WO2010147219A1 - Light source module and electronic equipment provided therewith - Google Patents

Light source module and electronic equipment provided therewith Download PDF

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Publication number
WO2010147219A1
WO2010147219A1 PCT/JP2010/060389 JP2010060389W WO2010147219A1 WO 2010147219 A1 WO2010147219 A1 WO 2010147219A1 JP 2010060389 W JP2010060389 W JP 2010060389W WO 2010147219 A1 WO2010147219 A1 WO 2010147219A1
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WO
WIPO (PCT)
Prior art keywords
light
light guide
source module
light source
shaped
Prior art date
Application number
PCT/JP2010/060389
Other languages
French (fr)
Japanese (ja)
Inventor
紗友里 若村
澄人 西岡
英治 栗本
秀明 名倉
啓至 酒井
Original Assignee
シャープ株式会社
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Publication date
Application filed by シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2010147219A1 publication Critical patent/WO2010147219A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0018—Redirecting means on the surface of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0075—Arrangements of multiple light guides
    • G02B6/0076—Stacked arrangements of multiple light guides of the same or different cross-sectional area
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0075—Arrangements of multiple light guides
    • G02B6/0078—Side-by-side arrangements, e.g. for large area displays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Definitions

  • the present invention relates to a light source used in a backlight including a side edge (also referred to as a sidelight) type light guide plate that emits light from a light source in a planar shape by a light guide plate, for example, in a liquid crystal display device.
  • the present invention relates to a module and an electronic device including the module.
  • a backlight having a side edge (also referred to as a sidelight) type light guide plate that emits light from a light source in a planar shape by a light guide plate is frequently used.
  • the illumination device 100 disclosed in Patent Document 1 is a light guide plate including a plurality of light guides 111 arranged in a line. 110 and a plurality of light sources 101 provided for each light guide 111 of the light guide plate 110 and irradiating light to the light guide 111.
  • the light source 101 is composed of one red LED (Light Emitting Diode) 101R, two green LEDs 101G, and one blue LED 101B.
  • a reflective sheet 102 is provided below the light guide plate 110.
  • a gap 103 made of an air layer of 0.1 ⁇ m or more is formed between the adjacent light guides 111. With this configuration, pseudo-impulse display can be performed.
  • Patent Document 2 also discloses the same type of light emitter structure.
  • Japanese Patent Publication Japanese Patent Laid-Open No. 2008-34372 (published on Feb. 14, 2008)” Japanese Patent Publication “Japanese Unexamined Patent Application Publication No. 2009-43706 (published February 28, 2009)”
  • the gap 103 between the light guides 111 needs to be about 1 to 2 mm in consideration of thermal expansion and manufacturing tolerance of the light guide 111.
  • FIG. 25 showing a mechanism for emitting light from the light guide 111.
  • the light traveling in the light guide 111 changes the angle of traveling in the light guide 111 by colliding with the light scatterer 112, the total reflection condition is broken, and the exit surface
  • the light is emitted out of the light guide 111 from 111a or the opposite surface 111b facing the emission surface 111a.
  • the distance between the facing surface 111b and the reflecting sheet 102 is substantially small, the light emitted from the facing surface 111b of the light guide 111 is reflected by the reflecting sheet 102 as shown by a solid arrow in FIG.
  • the light is incident again on the light guide 111, reflected by the side wall surface 111c, and then re-emitted from the emission surface 111a.
  • the present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a light source module capable of reducing the occurrence of uneven brightness and an electronic apparatus including the same.
  • the light source module of the present invention includes a plurality of light guides provided with a gap in parallel with each other in the longitudinal direction, and at least one end face of the light guide in the longitudinal direction.
  • a plurality of light sources that respectively input light from the light guide, and a plurality of light sources provided on the light emission side of the light guide or the reflective sheet side opposite to the light guide to extract the light guided inside the light guide.
  • the light source module comprising the optical path conversion unit, at least one side end of the cross section orthogonal to the longitudinal direction of the light guide is the other side end of the cross section orthogonal to the longitudinal direction of the light guide Alternatively, it is characterized by being formed thinner than the central portion.
  • the plurality of light guides constituting the light guide plate are provided in parallel with each other in the longitudinal direction. As a result, light irradiation is reduced in the gap, resulting in uneven brightness in the entire light guide plate.
  • At least one side end of the cross section perpendicular to the longitudinal direction of the light guide is formed thinner than the other side end or center of the cross section perpendicular to the longitudinal direction of the light guide. Yes. For this reason, the defect part of a light guide is made in each side edge part.
  • At least one side end portion of the light guide body is configured such that light emitted from the light guide body or light reflected by the reflection sheet of the light passes through the defect portion of the light guide body. It is possible to illuminate the gap between the light guides without re-entering the light.
  • an electronic device includes the light source module described above.
  • an electronic device including a light source module that can reduce the occurrence of uneven brightness.
  • At least one side end of the cross section orthogonal to the longitudinal direction of the light guide is the other side end or center of the cross section orthogonal to the longitudinal direction of the light guide. It is formed thinner than that.
  • the electronic apparatus of the present invention includes the light source module described above.
  • FIG. 1 is a cross-sectional view illustrating an embodiment of a light source module according to the present invention and illustrating optical paths at end portions of a plurality of light guides constituting a light guide plate. It is a disassembled perspective view which shows the structure of the liquid crystal display device provided with the said light source module. It is sectional drawing which shows a part of structure in a liquid crystal display device provided with the said light source module. It is a top view which shows the structure of the light-guide plate in the said light source module. It is a side view which shows the structure of the light-guide plate in the said light source module.
  • (A) is a side view which shows the structure of the light-guide plate in the said light source module
  • (b) is a top view which shows the printing pattern of the light-scattering body arrange
  • It is a graph which shows the effect confirmation result of the light source module provided with the said light-guide plate in the relationship between the position of a light guide, and a brightness
  • the other embodiment of the light source module in this invention is shown, Comprising: It is a side view which shows the structure of a caterpillar type light guide.
  • (A) is a top view which shows the printing pattern of the light-scattering body arrange
  • (b) shows the structure of the caterpillar type light guide corresponding to the said top view. It is a side view.
  • FIG. 11 is a side view showing still another embodiment of the light source module according to the present invention and showing the configuration of the light guide.
  • (A) is a side view which shows the structure of the modification in the said light guide,
  • (b) is a side view which shows the structure of the other modification in the said light guide.
  • (A) shows other embodiment of the light source module in this invention, Comprising: It is a side view which shows the structure of the light guide which has a curved chamfering, (b) does not have a curved chamfering. It is a side view which shows the structure of a light guide.
  • (A) is a top view which shows the display state of a light source module in the comparison with the light guide which has a front-end
  • (A) is a case where a comparison experiment is made between a light guide having a tip angle curved chamfered portion and a light guide having a rectangular cross section without a tip angle curved chamfered portion with respect to an optical path when light is emitted from the light guide.
  • FIG. 4 is a cross-sectional view of a light guide showing a light path in a light guide having a tip angle curved chamfered portion
  • FIG. 4D is a cross-sectional view of the light guide showing a light path in a light guide having a tip angle circular chamfered portion. It is.
  • FIG. 14 is a side view showing still another embodiment of the light source module according to the present invention and showing a configuration of a light guide body having a curved chamfer and a chamfer at a corner portion.
  • FIG. 10 is a side view showing still another embodiment of the light source module according to the present invention and showing a configuration of a light guide body having a defect portion only at one side end portion. It is a side view which shows the modification of the said light guide, Comprising: The structure of the light guide of a caterpillar structure which has a defect
  • FIG. 14 is a disassembled perspective view showing still another embodiment of the light source module according to the present invention and showing a configuration of a liquid crystal display device including the light source module.
  • FIG. 24 is a cross-sectional view taken along the line A-A ′ of FIG. It is a top view which shows the brightness nonuniformity which generate
  • a liquid crystal display device 1A as an electronic apparatus including the light source module 10 according to the present embodiment includes a chassis 2, a light source module 10, a liquid crystal panel 3, and a bezel 4 in order from the bottom as shown in FIG.
  • the light source module 10 includes a reflection sheet 11 as a reflection plate, an LED (Light-Emitting Diode) 12 and LED substrate 13 as a light source, a reflector 14, a light guide plate 20, a diffusion plate 15, and an optical sheet group 16. It is composed of Note that the optical sheet group 16 may not exist in the present invention.
  • the LED 12, the LED substrate 13, and the reflector 14 are provided at the end portion of the light guide plate 20, so that light from the LED 12 is incident on one end surface 21 a of the light guide plate 20 and guided.
  • the liquid crystal panel 3 is irradiated with light from the exit surface 21 d of the light plate 20 through the diffusion plate 15 and the optical sheet group 16. Therefore, the light source module 10 of the present embodiment employs a side edge (also referred to as side light) method.
  • the liquid crystal display device 1A has a problem of blurring of a moving image as compared with a CRT (Cathode-Ray® Tube) display device. That is, in the CRT display device, since there is a non-light emission period in which this pixel does not emit light between the light emission period of the pixel in a certain frame and the light emission period of this pixel in the next frame, there is little afterimage feeling. On the other hand, since the display method of the liquid crystal display device 1A is a “hold type” that does not have such a non-light emission period, an afterimage feeling is generated, and this afterimage feeling is recognized by the user as blurring of moving images.
  • a CRT Cathode-Ray® Tube
  • the light source module 10 which is a backlight is divided and sequentially turned off in synchronization with the timing of applying the video signal to the liquid crystal panel 3, thereby displaying images and images.
  • Backlight blinking which is a technique for inserting a black display between them, has been proposed. Thereby, pseudo-impulse type display can be realized, the afterimage feeling can be suppressed, and the power consumption can be reduced.
  • the light source module 10 is configured by dividing the light guide plate 20 by a plurality of light guides 21 as shown in FIG.
  • the bodies 21 are arranged with gaps 22 in parallel with each other in the longitudinal direction. Therefore, in the present embodiment, as shown in FIG. 3, the LED 12 is configured to make light incident from a T-shaped thick portion 21 c described later on one end surface 21 a in the longitudinal direction of each light guide 21. Yes.
  • it is not necessarily limited to one end surface 21a, but may be incident from the other end surface in the longitudinal direction, and light may be incident from both one end surface 21a and the other end surface. That is, in the present invention, it is sufficient that light is incident from at least one end face 21a.
  • the clearance 22 is about 1 to 2 mm in consideration of thermal expansion and manufacturing tolerances. is necessary.
  • the T-shaped thin portion as the side end portions of the adjacent light guides 21 and 21 facing each other.
  • Each of 21b and 21b is formed thinner than the T-shaped thick portion 21c as the central portion of the cross section orthogonal to the longitudinal direction of the light guide 21.
  • the light guide 21 of the present embodiment has a T-shaped cross section with a missing portion 21f on the emission side or the reflection sheet side at the side end, and is formed thickly. 21c and thinly formed T-shaped thin portions 21b and 21b.
  • the length of the thinly formed portions of the T-shaped thin portions 21b and 21b toward the T-shaped thick portion 21c is at least equal to or greater than the thickness of the T-shaped thick portion 21c of the light guide 21. Is preferred. That is, it is preferable that the length is 1: 1 or more with respect to the thickness of the T-shaped thick portion 21c of the light guide 21.
  • FIG. 1 is a cross-sectional view showing the principle capable of preventing the occurrence of luminance unevenness.
  • the light traveling in the light guide 21 changes the angle of traveling in the light guide 21 by colliding with the light scatterer 23 as an optical path changing unit, and is totally reflected.
  • the condition is broken, and the light exits from the light exit surface 21 d to the outside of the light guide 21 and travels toward the diffusion plate 15.
  • this optical path light does not reach the center of the gap 22 in the diffusion plate 15.
  • the T-shaped thin portions 21b and 21b of the light guide 21 are formed thin, in the vicinity of the gap 22, they face the emission surface 21d in the T-shaped thin portions 21b and 21b.
  • a large space can be provided between the opposing surface 21e, which is a surface, and the reflection sheet 11. That is, the lower side of the T-shaped thin portions 21b and 21b is a missing portion 21f.
  • the light emitted from the opposing surfaces 21 e of the T-shaped thin portions 21 b and 21 b of the light guide 21 is reflected by the reflection sheet 11 and re-appears on the light guide 21.
  • the gap 22 between the light guides 21 and 21 in the diffusion plate 15 can be illuminated without being incident. Therefore, unevenness in the gap 22 is unlikely to occur.
  • FIG. 6A is a cross-sectional view of the light guide 21 of the present embodiment
  • FIG. 6B is a print pattern of the light scatterer 23 provided on the emission side surface of the light guide 21 of the present embodiment.
  • the light guide 21 of the present embodiment has, for example, a length of the emission side surface of 21 mm, a side end portion of the T-shaped thin portion 21b having a height of 2 mm, and a central portion.
  • the height of a certain T-shaped thin portion 21b is 5 mm, and the length of the T-shaped thin portion 21b is 9 mm.
  • the light-scattering body 23 is formed in the output side surface of the light guide 21 as a printing pattern.
  • light scattering particles are dispersed in a polymer and printed to form the light scatterer 23.
  • the present invention is not limited to this, and other methods may be used.
  • a phosphor may be used as the light scattering particle, and the light scattering body 23 may be formed with a fine uneven shape such as a prism. It is also possible to form a pattern by providing a rough surface on the emission side surface or the reflection sheet side surface by blasting or the like.
  • the printed pattern is formed in a ladder shape by dividing, for example, the emission side surface of the light guide 21 and is symmetric about the center of the T-shaped thick portion 21c.
  • the printed pattern has a pattern interval of the light scatterers 23 that decreases in parallel with the longitudinal direction and the light guide 21.
  • the pitch is shortened toward the side end of the T-shaped thin portion 21b. This is because the luminance decreases as the distance from the LED 12 as the light source increases, so that the arrangement density of the light scatterers 23 needs to be increased as the distance from the LED 12 as the light source increases.
  • the light scatterer 23 is linear here, it is not always necessary to specify the linear shape, and various shapes such as a circular shape and a rectangular shape are possible.
  • the light scatterer 23 is formed on the exit side surface of the light guide 21.
  • the present invention is not limited to this, and the light scatterer 23 may be formed on the reflective sheet side surface of the light guide 21. Also by this, the same effect as the case where the light scatterer 23 is formed on the exit side surface of the light guide 21 can be obtained.
  • FIG. 7 shows the results confirmed by simulation for the effect of preventing the occurrence of uneven brightness when the light source module 10 is used.
  • FIG. 7 is a graph showing a simulation result when the gap 22 is 1 mm. The vertical axis represents relative luminance, and the horizontal axis represents the distance from the center of the gap 22.
  • the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention.
  • the T-shaped thin portions 21 b and 21 b are formed in the T-shaped thin portions 21 b and 21 b by providing the missing portions 21 f on the reflection sheet 11 side in the T-shaped thin portions 21 b and 21 b. It was thinner than the thick parts 21c and 21c.
  • the defect portion 21f is not necessarily provided on the reflection sheet 11 side of the light guide 21.
  • the defect portion 21f may be provided on the emission side of the light guide 21, as shown in FIG.
  • the guide 21 is guided in the T-shaped thick portion 21c of the light guide 21 as shown by a broken line arrow in FIG.
  • the light traveling in the light body 21 collides with the light scatterer 23 to change the traveling angle in the light guide 21, the total reflection condition is broken, and the light exits from the light exit surface 21 d to the outside of the light guide 21, and is diffused. Head to board 15. However, in this optical path, light does not reach the central portion of the gap 22 in the diffusion plate 15 as in the case of FIG.
  • the defect portion 21f is present on the exit side of the T-shaped thin portions 21b and 21b of the light guide 21, near the gap 22, the defect portion 21f is located between the exit surface 21d and the diffusion plate 15. Large spacing can be provided. As a result, as shown by the solid line arrow in FIG. 8, the light traveling in the light guide 21 changes the angle of traveling in the light guide 21 by colliding with the light scatterer 23, and the total reflection condition is broken. Then, the light is reflected by the reflection sheet 11 provided on the facing surface 21e, and is emitted to the outside of the light guide 21 from the emission surface 21d of the T-shaped thin portion 21b. As a result, it is possible to easily illuminate the upper part of the gap 22 between the light guides 21 and 21 in the diffusion plate 15. Therefore, unevenness in the gap 22 is unlikely to occur.
  • deletion part 21f in the middle of the output side surface in the light guide 21, or the reflective sheet 11 side surface, it has the same effect.
  • the diffusion plate 15 is provided above the light exit surface 21d of the light guide 21 with a distance D of, for example, 2 mm. Thereby, compared with the case where the diffuser plate 15 is brought into close contact with the light exit surface 21d of the light guide 21, luminance unevenness can be reduced.
  • the light source module 10 includes a plurality of light guides 21 provided with the gaps 22 in parallel to the longitudinal direction, and at least one of the light guides 21 in the longitudinal direction.
  • a plurality of LEDs 12 that respectively enter light from the end face 21a of the light guide 21 and the reflection sheet 11 that is the light emission side of the light guide 21 or the opposite side to extract the light guided inside the light guide 21
  • a plurality of light scatterers 23 as optical path conversion units provided on the side.
  • T-shaped thin part 21b * 21b as each side edge part of the cross section orthogonal to the longitudinal direction in the light guide 21 is T-shaped thick part as the center part of the cross section orthogonal to the longitudinal direction in the light guide 21 It is formed thinner than 21c.
  • a plurality of light guides 21 constituting the light guide plate 20 are provided with gaps 22 in parallel with each other in the longitudinal direction. In the gap 22, light irradiation is reduced, and luminance unevenness occurs in the entire light guide plate.
  • the T-shaped thin portions 21b and 21b having a cross section orthogonal to the longitudinal direction of the light guide 21 are formed into the T-shaped thick portions 21c and 21c having a cross section orthogonal to the longitudinal direction of the light guide 21. It is formed thinner than. For this reason, in each T-shaped thin part 21b and 21b, the missing part 21f of the light guide 21 is formed.
  • the light emitted from the light guide 21 or the reflected light of the light on the reflection sheet 11 passes through the missing portion 21 f of the light guide 21.
  • the gap 22 between the light guides 21 and 21 can be illuminated without re-entering the light guide 21.
  • the light source module 10 that can avoid insufficient brightness in the gap 22 and reduce the occurrence of uneven brightness.
  • the T-shaped thin portions 21b and 21b of the light guide 21 are provided with the missing portions 21f on the reflective sheet 11 side of the T-shaped thin portions 21b and 21b. It is formed thinner.
  • each T character thin part 21b * 21b of the light guide 21 the reflected light in the reflective sheet 11 as a reflecting plate of the light radiate
  • the gap 22 between the light guides 21 and 21 is illuminated without reentering the light guide 21.
  • the T-shaped thin portions 21b and 21b of the light guide 21 are formed thin by providing the missing portion 21f on the emission side of the light guide 21. It is possible to be.
  • each T-shaped thin part 21b * 21b of the light guide 21 the light radiate
  • the gap between the light guides 21 and 21 can be illuminated.
  • the light-scattering body 23 as an optical path conversion part has the arrangement
  • the T-shaped thin portions 21 b and 21 b of the light guide 21 have a smaller amount of light from the LED 12 than the T-shaped thick portions 21 c of the light guide 21.
  • the light scatterer 23 is arranged on the emission side of the T-shaped thin portions 21b and 21b of the light guide 21 or on the reflection sheet 11 side, and the emission density of the T-shaped thick portion 21c of the light guide 21
  • the light emitted from the emission side of each of the T-shaped thin portions 21b and 21b of the light guide 21 or the reflection sheet 11 side is arranged by being arranged so as to have a higher density than the arrangement density on the reflection sheet 11 side. Can be increased.
  • the light scatterer 23 is provided on the surface on the exit side of the light guide 21 or the reflective sheet 11 side where the missing portion 21f does not exist. Therefore, when the light-scattering body 23 is pattern-arranged by printing, it can be printed on a smooth flat surface having no irregularities on the light-emitting body 21 side or the reflective sheet 11 side.
  • a diffusion plate 15 for diffusing light emitted from the light guide 21 is spaced above the light guide 21 by a distance D from the emission side surface of the light guide 21. Is provided.
  • the plurality of light guides 21 are provided with the gaps 22 in parallel with each other in the longitudinal direction, as described above, they are orthogonal to the longitudinal direction of the light guide 21.
  • the T-shaped thin portions 21b and 21b of the cross section thinner than the T-shaped thick portion 21c of the cross section perpendicular to the longitudinal direction of the light guide 21, the occurrence of luminance unevenness in the gap 22 is reduced. Can do.
  • the diffusion plate 15 when the diffusion plate 15 is disposed above the light guide 21, the brightness unevenness is less noticeable when the diffusion plate 15 is moved away from the light guide 21. Therefore, by providing the diffusing plate 15 with a distance D ( ⁇ 0) from the emitting side surface of the light guide 21 rather than arranging the diffusing plate 15 in close contact with the emitting side surface of the light guide 21, luminance unevenness can be reduced. Generation can be reduced.
  • the liquid crystal display device 1A as the electronic apparatus of the present embodiment includes the light source module 10 of the present embodiment.
  • the liquid crystal display device 1 ⁇ / b> A including the light source module 10 that can reduce the occurrence of uneven brightness can be provided.
  • the light guide plate 20 of the light source module 10 includes a plurality of light guides 21 provided with gaps 22 in parallel with each other in the longitudinal direction.
  • each light guide 21 is a single T-type light guide having a T-shaped cross section perpendicular to the longitudinal direction.
  • each light guide has a caterpillar light guide in which a plurality of T-type light guide portions 30 each having a T-shaped cross section perpendicular to the longitudinal direction are connected. The point which consists of the body 41 is different.
  • the thin-walled portions 41b and 41b are thinner than the T-shaped thick portions 41c and 41c into which the light from the LED 12 is incident.
  • the caterpillar light guide 41 is a caterpillar type by providing the T-shaped thin portions 41b and 41b thinner than the T-shaped thick portions 41c and 41c in the intermediate portion. Yes.
  • the reason why the shape of the light guide is a caterpillar type is to reduce the weight by partially reducing the thickness of the light guide.
  • the number of light guides to be arranged can be reduced by increasing the length on the side orthogonal to the longitudinal direction of the light guide, it is also for improving the assembly of the light guide plate 20.
  • the length of the caterpillar light guide 41 on the side perpendicular to the longitudinal direction is, for example, 84 mm.
  • the thickness of the T-shaped thick part 41c is, for example, 5 mm, and the length of the T-shaped thick part 41c is, for example, 9 mm, both of which are the same as in the first embodiment. Furthermore, the thickness of the T-shaped thin portion 41b is 2 mm, for example, and the length of the T-shaped thick portion 41c is 12 mm, for example.
  • FIG. 10A is a plan view showing an arrangement pattern of the light scatterers 23 provided on the emission side surface of the caterpillar light guide 41
  • FIG. 10B is a cross-sectional view of the caterpillar light guide 41. is there.
  • the LED 12 is provided on the side surface side of the T-shaped thick portion 41 c in the caterpillar light guide 41.
  • the arrangement of the light scatterers 23 in the present embodiment is such that the light scatterers 23 are parallel to the longitudinal direction toward the back (upper side of the paper surface in FIG. 10A).
  • the pattern interval is shortened, and the T-shaped thin portions 41b of the caterpillar light guide 41 are shorter in pitch than the T-shaped thick portions 41c. That is, it can be seen that the arrangement density of the light scatterers 23 is higher in the T-shaped thin portions 41b than in the T-shaped thick portions 41c.
  • the caterpillar light guide 41 can achieve uniform luminance.
  • the caterpillar light guide 41 as the light guide has a plurality of T-type light guide portions 30 each having a T-shaped cross section perpendicular to the longitudinal direction.
  • the LED 12 as each light source makes light incident from the end faces of the T-shaped thick portions 41 c and 41 c that are thick portions in the T-type light guide 30.
  • the number of light guides in the light guide plate 20 can be reduced, the number of parts can be prevented, and a plurality of missing portions 21f can be formed in the central portion, thereby reducing the weight of the light guide plate 20. can do. Therefore, the light guide plate 20 can be reduced in weight and cost can be reduced. That is, although the light guide plate 20 is made of, for example, an acrylic resin, the material cost can be reduced.
  • the light-scattering body 23 as an optical path conversion part is the emission side of the T-shaped thin part 41b ... which is a thin part in the T-type light guide part 30, or the reflective sheet 11 side.
  • the light-scattering body 23 as an optical path conversion part is the emission side of the T-shaped thin part 41b ... which is a thin part in the T-type light guide part 30, or the reflective sheet 11 side.
  • the T-shaped thin portions 41b and 41b in the T-shaped light guide body 30 have a smaller amount of light from the LED 12 than the T-shaped thick portion 41c.
  • the light scattering body 23 is arranged such that the arrangement density on the emission side of the T-shaped thin portions 41b and 41b or the reflection sheet 11 side in the T-shaped light guide portion 30 is the emission side or the reflection sheet of the T-shaped thick portion 41c.
  • the light scatterer 23 is provided on the surface on the exit side or the reflection sheet 11 side of the caterpillar light guide 41 where the missing portion 21f does not exist.
  • the light scatterers 23 are arranged in a pattern by printing, printing can be performed on a smooth flat surface having no irregularities on the exit side of the caterpillar light guide 41 or the reflection sheet 11 side.
  • the liquid crystal display device 1A as the electronic apparatus of the present embodiment includes the light source module 10 of the present embodiment.
  • the liquid crystal display device 1 ⁇ / b> A including the light source module 10 that can reduce the occurrence of uneven brightness can be provided.
  • Embodiment 3 The following will describe still another embodiment of the present invention with reference to FIGS.
  • the configurations other than those described in the present embodiment are the same as those in the first embodiment and the second embodiment.
  • members having the same functions as those shown in the drawings of Embodiment 1 and Embodiment 2 are given the same reference numerals, and explanation thereof is omitted.
  • the corners of the T-shaped thick portion and the T-shaped thin portion are formed in a rectangular shape.
  • the present embodiment is different in that the corner portions of the T-shaped thick portion and the T-shaped thin portion are chamfered as shown in FIG.
  • the chamfer 50 at the corner portion at the boundary between the T-shaped thick portion 21c and the T-shaped thin portion 21b can be a curved chamfer 51 as shown in FIG. That is, the curved chamfer 51 has a curved cross section such as a circle or an ellipse.
  • the chamfer 50 at the corner portion of the T-shaped thick portion 21c and the T-shaped thin portion 21b does not necessarily need to be a curved chamfer 51.
  • a straight chamfer 52 that extends linearly from the middle of the T-shaped thick portion 21c toward the T-shaped thin portion 21b can also be used.
  • an inflection point can be made, but the light incident on the light guide 21 from the LED 12 is guided to the T-shaped thin portion 21b, so that a decrease in the light guided to the T-shaped thin portion 21b is suppressed. can do.
  • a decrease in light emitted from the T-shaped thin portion 21b can be suppressed, and a decrease in luminance uniformity can be suppressed.
  • a linear chamfer 53 that linearly chamfers from the beginning of the T-shaped thick portion 21c can be used. . Thereby, there is no inflection point, and light can be guided to the T-shaped thin portion 21b.
  • Chamfers 50 such as a curved chamfer 51 and straight chamfers 52 and 53 are provided at the corners of the.
  • the light which guides the T-shaped thick part 21c as a center part in the light guide 21 is reflected in the corner part in the boundary with T-shaped thin part 21b * 21b as a side edge part. Therefore, it is possible to prevent the light from being guided to the T-shaped thin portions 21b and 21b. Accordingly, it is possible to suppress a decrease in luminance at the T-shaped thin portions 21b and 21b.
  • the T-shaped thin portions 41 b and 41 b that are thin portions in the plurality of T-type light guide portions 30 of the caterpillar type light guide 41 and the T-type light guide portion 30. It can be assumed that chamfering 50 is applied to each corner portion at the boundary with the T-shaped thick portion 41c.
  • the caterpillar light guide 41 having a plurality of T-type light guide portions 30... The light that guides the T-shaped thick portion 41 c in the T-type light guide portion 30 is converted into the T-type light guide portion. It is possible to prevent light from being guided to the T-shaped thin portions 41b and 41b by being reflected at the corners at the boundaries between the T-shaped thin portions 41b and 41b. Accordingly, it is possible to suppress a decrease in luminance at the T-shaped thin portions 41b and 41b.
  • the liquid crystal display device 1A as the electronic apparatus of the present embodiment includes the light source module 10 of the present embodiment.
  • the liquid crystal display device 1 ⁇ / b> A including the light source module 10 that can reduce the occurrence of uneven brightness can be provided.
  • the T-shaped thick part 21c (or the T-shaped thick part 41c) is It was formed in a rectangle.
  • the T-shaped thick portion 21c (or T-shaped thick portion 41c) of the light guide 21 (or the caterpillar light guide 41) has a tip angle curved chamfer 60 as a curved chamfer in which a rectangle is chamfered.
  • the T-shaped thick portion 21c is formed in a rectangular shape, as shown by the broken-line circle on the right side of FIG. 14B, the vicinity of the edge of the T-shaped thick portion 21c that is not chamfered.
  • the inflection point can be confirmed at, and it can be seen that a dark line is generated as shown on the lower side of the drawing in FIG.
  • the distal end angle curved chamfered portion 60 is provided in the distal end rectangle of the T-shaped thick portion 21c (or T-shaped thick portion 41c) of the light guide 21 (or caterpillar light guide 41).
  • the distal end angle curved chamfered portion 60 is provided in the distal end rectangle of the T-shaped thick portion 21c (or T-shaped thick portion 41c) of the light guide 21 (or caterpillar light guide 41).
  • FIGS. 15C and 15D from the center of the lower surface of the T-shaped thick part 21c (or T-shaped thick part 41c) of the light guide 21 (or caterpillar light guide 41).
  • the emitted light there are no or few totally reflected light rays. As a result, an abrupt change is unlikely to occur in the illuminance distribution on the light receiving surface.
  • the tip angle curved chamfered portion 60 in the tip rectangular shape in the T-shaped thick portion 21c improves the luminance uniformity by making it a circular chamfer even among the curves.
  • the tip angle curved chamfered portion 60 is applied to the tip corner portion of the T-shaped thick portion 21c as the central portion in the light guide 21.
  • the tip as a curved chamfer is provided at the tip corner of the T-shaped thick portion 41c of the plurality of T-shaped light guides 30 of the caterpillar light guide 41.
  • An angular curved chamfer 60 is provided.
  • the caterpillar light guide 41 having a plurality of T-shaped light guide parts 30... The light guided by the T-shaped thick parts 41 c of the caterpillar light guide 41 is a caterpillar light guide.
  • the present invention is not necessarily limited to this, for example, the embodiment.
  • the light guide 21 combined with the configuration 3 can be obtained.
  • a tip angle curved chamfered portion 60 is provided in the tip rectangle of the T-shaped thick portion 41c, and the T-shaped thick portion 41c It is possible to provide a chamfer 50 at a corner with the T-shaped thin portion 41b.
  • the amount of light guided to the T-shaped thin portion 41b can be increased, and luminance unevenness at the edge of the front end rectangle can be prevented.
  • the liquid crystal display device 1A as the electronic apparatus of the present embodiment includes the light source module 10 of the present embodiment.
  • the liquid crystal display device 1 ⁇ / b> A including the light source module 10 that can reduce the occurrence of uneven brightness can be provided.
  • the defect portions 21f are provided on both sides of the light guide.
  • the present embodiment is different in that the defect portion 21f is provided only on one side of the light guide 71 as shown in FIG.
  • the effect described in the first embodiment can be obtained even in the state where the defect portion 21f is provided only on one side like the light guide 71 of the present embodiment.
  • the same effect as in the second embodiment can be obtained even when the caterpillar structure is formed by connecting a plurality of light guides each having the missing portion 21f only on one side.
  • a liquid crystal display device 1B as an electronic apparatus including the light source module 10 according to the present embodiment includes a chassis 2, a light source module 10, a liquid crystal panel 3, and a bezel 4 in order from the bottom as shown in FIG.
  • the light source module 10 includes a reflection sheet 11 as a reflection plate, an LED (Light-Emitting Diode) 12 and LED substrate 13 as a light source, a reflector 14, a light guide plate 20, a diffusion plate 15, and an optical sheet group 16. It is composed of Note that the diffusion plate 15 and the optical sheet group 16 may not exist in the present invention.
  • the LED 12, the LED substrate 13, and the reflector 14 are provided at the end portion of the light guide plate 20, so that light from the LED 12 is incident on one end surface 21 a of the light guide plate 20 and guided.
  • the liquid crystal panel 3 is irradiated with light from the exit surface 21 d of the light plate 20 through the diffusion plate 15 and the optical sheet group 16. Therefore, the light source module 10 of the present embodiment employs a side edge (also referred to as side light) method.
  • the diffusion plate 15 is disposed in close contact with the light exit surface 21d of the light guide 21 without providing a gap.
  • the light source module 10 of the present embodiment is configured by dividing the light guide plate 20 by a plurality of light guides 21 as shown in FIG. 4 in the first embodiment. These light guides 21 are arranged with a gap 22 in parallel with each other in the longitudinal direction. Therefore, in the present embodiment, as shown in FIG. 20, the LED 12 causes light to enter from the T-shaped thick portion 21 c shown in FIG. 1 on one end face 21 a in the longitudinal direction of each light guide 21. It has become.
  • it is not necessarily limited to one end surface 21a, but may be incident from the other end surface in the longitudinal direction, and light may be incident from both one end surface 21a and the other end surface. That is, in the present invention, it is sufficient that light is incident from at least one end face 21a.
  • the clearance 22 is about 1 to 2 mm in consideration of thermal expansion and manufacturing tolerances. is required.
  • each light guide 21 of the light guide plate 20 has a T-shaped cross section in which fixing portions 21b and 21b are provided on both sides of a T-shaped thick portion 21c at the center.
  • the fixed portions 21b and 21b are formed such that the surface on the chassis 2 side is flush with the surface on the chassis 2 side of the T-shaped thick portion 21c.
  • the light guide plate 20 is fixed to the chassis 2 by sandwiching the fixing portions 21b and 21b together with the chassis 2 between the upper presser 81 and the lower presser 82 of the fixture 80.
  • the detailed shape of the light guide 21 is as follows.
  • the fixing portions 21b and 21b as the side ends facing each other of the adjacent light guides 21 and 21 are more than the T-shaped thick portion 21c as the central portion of the cross section perpendicular to the longitudinal direction of the light guide 21. Thinly formed.
  • the light guide body 21 of the present embodiment has a T-shaped thick section formed with a T-shaped section at the side end portion with the missing portions 21f and 21f on the diffusion plate 15 side. 21c and thinly formed fixing portions 21b and 21b.
  • the structure of the fixture 80 is not limited to that shown in FIG. 21, and can be arbitrarily selected as long as the fixing portions 21 b and 21 b are attached directly or indirectly to the chassis 2.
  • the fixed portions 21b and 21b are formed so that the surface of the fixed portions 21b and 21b on the chassis 2 side is flush with the surface of the T-shaped thick portion 21c on the chassis 2 side. It is preferable that the contact surface between the body 21 and the chassis 2 is wide. However, the present invention is not limited to this. That is, as long as the light guide 21 can be fixed to the chassis 2, the positions of the fixing portions 21b and 21b are arbitrary, and may be positioned closer to the emission surface 21d, for example.
  • [Print pattern] A pattern example of the light scatterer 23 formed on the light guide 21 having the fixing portions 21b and 21b will be described with reference to FIGS. 22A and 22B are views showing the light guide 21 in which the light scatterer 23 is formed by the printing pattern A.
  • FIGS. 22A and 22B are views showing the light guide 21 in which the light scatterer 23 is formed by the printing pattern A.
  • the light guide 21 has a T-shaped thick portion 21c and a surface of the fixing portion 21b / 21b on the chassis 2 side (opposing surface 21e) in the form of a printing pattern A.
  • a light scatterer 23 is formed.
  • the light guide 21 has a length in the longitudinal direction of 1361.0 mm (may be 900 to 1600 mm depending on the screen size), and a length in the short direction of 93 to 99 mm (40 to 100 mm).
  • the thickness of the T-shaped thick portion 21c as the central portion is 4 mm
  • the thickness of the fixing portions 21b and 21b as the side ends is 1 mm
  • the fixing portion 21b The length of 21b is 2 mm.
  • a groove (not shown) is provided along the longitudinal direction on the emission surface 21d (opposite the facing surface 21e) of the T-shaped thick portion 21c. Is formed.
  • the groove has a pitch of 1 mm (0.6 mm or more, for example, 1 mm) and a depth of 0.23 mm (varies depending on the pitch, but may be 0.18 mm or more, for example, 0.3 mm). Good).
  • fixed part 21b * 21b shown in figure are vertical surfaces, you may have an inclination part.
  • the printed pattern A is formed, for example, in a polka dot pattern as a circular shape on the opposing surface 21e, which is the pattern arrangement surface of the light guide 21, and is symmetric with respect to the center of the T-shaped thick portion 21c. ing.
  • the print pattern A has a large dot diameter and is substantially uniform in the area of the pattern arrangement surface corresponding to the T-shaped thick portion 21c.
  • the pattern size, the pattern interval, and the like are different from the T-shaped thick portion 21c. The reason for this is to construct a planar light source with high luminance uniformity. However, it is not limited to this pattern.
  • the dot diameter is, for example, 100 ⁇ m to 1000 ⁇ m (may be 100 ⁇ m to 2000 ⁇ m).
  • the light source module of the present invention it is assumed that at least one side end portion of the light guide is thinly formed by providing the defective portion on the reflection sheet side of the light guide. It is possible.
  • the light reflected from the reflection sheet of the light emitted from the light guide passes through the defect portion of the light guide and reenters the light guide. Without illuminating the gaps between the light guides.
  • At least one side end portion of the light guide can be formed thin by providing a defect portion on the light exit side of the light guide. is there.
  • emitted from the light guide passes through the defect
  • the light guide has a structure in which a plurality of T-shaped light guide portions each having a T-shaped cross section orthogonal to the longitudinal direction are connected. The light can be incident from the end face of the T-shaped thick portion which is the thick portion of the T-shaped light guide.
  • the number of light guides in the light guide plate can be reduced, the increase in the number of parts can be prevented, and a plurality of defective portions can be formed in the central portion, so that the weight of the light guide plate can be reduced. it can. Therefore, the light guide plate can be reduced in weight and the cost can be reduced.
  • the light guide has a plurality of thin portions that are missing portions in a cross section perpendicular to the longitudinal direction, and the light sources are provided in the light guide. It is possible to make light incident from the end face of the thick part.
  • the number of light guides in the light guide plate can be reduced, the increase in the number of parts can be prevented, and a plurality of defective portions can be formed in the central portion, so that the weight of the light guide plate can be reduced. it can. Therefore, the light guide plate can be reduced in weight and the cost can be reduced.
  • the optical path conversion unit may have an arrangement density on the emission side or the reflection sheet side of at least one side end of the light guide, or the other side end of the light guide or It is preferable that the arrangement density is higher than the arrangement density on the emission side or the reflection sheet side of the central portion.
  • At least one side end of the light guide has less light from the light source than the other side end or center of the light guide.
  • the arrangement density of at least one side end of the light guide on the exit side or the reflection sheet side of the optical path conversion unit is the other end or center of the light guide on the exit side or the reflection sheet side.
  • the optical path conversion unit has an arrangement density on the emission side or the reflection sheet side of the T-shaped thin portion which is a thin portion in the T-type light guide portion. It is preferable that it is arrange
  • the light amount from the light source is smaller in the T-shaped thin portion in the T-shaped light guide portion than in the T-shaped thick portion.
  • the arrangement density of the T-shaped light guide portion on the emission side or the reflection sheet side of the optical path conversion unit is larger than the arrangement density on the emission side or reflection sheet side of the T-shaped thick portion.
  • by arranging so as to have a high density it is possible to increase the emitted light from the emission side or the reflection sheet side of the T-shaped thin portion in the T-type light guide.
  • the optical path conversion unit is disposed on the exit side or the reflection sheet side of the thick portion so that the arrangement density on the exit side or the reflection sheet side of the thin portion in the light guide is set. It is preferable that they are arranged so as to have a higher density than the density.
  • the optical path conversion unit is arranged such that the arrangement density on the emission side or the reflection sheet side of the thin part in the light guide is higher than the arrangement density on the emission side or the reflection sheet side of the thick part.
  • the optical path conversion unit is provided on a light exit side or a reflection sheet side of the light guide body on a side where no missing portion exists.
  • the optical path changing unit when the optical path changing unit is arranged in a pattern by printing, printing can be performed on a smooth flat surface without any irregularities on the light exit side or the reflection sheet side.
  • the boundary between the central portion of the light guide and the side end formed thinner than the central portion, or the other side end and thinner than the other side end.
  • the corner portion at the boundary with the one side end portion is preferably chamfered.
  • the light which guides the center part in the light guide or the other side end part is not guided to the side end part by being reflected at the corner part at the boundary with at least one side end part. Can be prevented. Therefore, it is possible to suppress a decrease in luminance at the side end.
  • each in the boundary of the T-shaped thin part which is a thin part in the several T type light guide part of the said light guide, and the T-shaped thick part in this T type light guide part is preferably chamfered.
  • the light that guides the T-shaped thick portion in the T-type light guide portion is transmitted at the corner portion at the boundary with the T-shaped thin portion. It is possible to prevent the light from being guided to the T-shaped thin portion by being reflected. Accordingly, it is possible to suppress a decrease in luminance at the T-shaped thin portion.
  • each corner portion at the boundary between the plurality of thin portions of the light guide and the thick portion of the light guide is chamfered.
  • the light that guides the thick portions in the light guide is not guided to the thin portions by being reflected at the corners at the boundary with the thin portions. This can be prevented. Accordingly, it is possible to suppress a decrease in luminance at the thin portion.
  • a chamfered chamfer is applied to the central corner of the light guide or the tip corner of the other side end.
  • a curved chamfer is applied to a tip corner portion of the T-shaped thick portion in the plurality of T-type light guide portions of the light guide.
  • the light guide having a plurality of T-shaped light guide parts when the light guided by the T-shaped thick part in the light guide is emitted from the light guide, It is possible to prevent the occurrence of uneven brightness by not being emitted from the tip corner. That is, by applying a curved chamfer to the corner of the tip of the T-shaped thick portion, light is emitted from the curved chamfer, so that uneven brightness can be prevented.
  • the chamfered chamfer is applied to the corner portion of the thick portion of the light guide.
  • the light guide having a plurality of thin portions when the light guided by the thick portion in the light guide is emitted from the light guide, it is not emitted from the tip corner portion of the thick portion. It is possible to prevent uneven brightness from occurring. That is, since the light is emitted from the curved chamfer by applying the curved chamfer to the corner portion of the thick wall portion, it is possible to prevent the occurrence of luminance unevenness.
  • a diffusion plate for diffusing light emitted from the light guide is provided above the light guide with a gap from the emission side surface of the light guide. Is preferred.
  • the luminance unevenness in the gaps is obtained by having the configuration of the present invention as described above. Can be reduced.
  • the diffusion plate when the diffusion plate is disposed above the light guide, the luminance unevenness is less noticeable when the diffusion plate is moved away from the light guide. Therefore, it is possible to reduce occurrence of luminance unevenness by providing the diffusion plate with a space from the emission side surface of the light guide rather than arranging the diffusion plate in close contact with the emission side surface of the light guide.
  • the present invention relates to a light source module including a side edge (also referred to as a sidelight) type light guide plate that emits light from a light source in a planar shape by a light guide plate, and an electronic device including the light source module. It can be applied to electronic devices such as light source modules and liquid crystal display devices.
  • Liquid crystal display device (electronic equipment) 1B Liquid crystal display device (electronic equipment) 3 Liquid Crystal Panel 10 Light Source Module 11 Reflective Sheet 12 LED (Light Source) 15 Diffusion plate 20 Light guide plate 21 Light guide 21a End face 21b T-shaped thin part (side end part) 21c T-shaped thick part (central part) 21d Outgoing surface 21e Opposing surface 21f Defect portion 21g Side wall surface 22 Gap 23 Light scatterer (light path changing portion) 30 T-type light guide part 41 Caterpillar type light guide (light guide) 41b T-shaped thin part (side edge) 41c T-shaped thick part 50 Chamfer (Chamfer at corner) 51 Curved chamfer (Chamfered corner) 52 Straight chamfering (corner chamfering) 53 Straight chamfering (corner chamfering) 60 Tip angle curve chamfer (curved chamfer of tip corner) 71 Light guide 80 Fixing tool D Interval

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Abstract

Disclosed is a light source module (10) wherein a plurality of light-guide bodies (21) forming a light-guide plate are provided in a row in the longitudinal direction and have respective gaps (22) therebetween. The light source module is provided with a plurality of LEDs that respectively introduce light from at least one longitudinal end face of the plurality of light-guide bodies (21). Thin sections (21b, 21b) of a T-shape on at least one of each side edge of the cross-section orthogonal to the longitudinal direction of the light-guide bodies (21) are formed thinner than thick sections (21c, 21c) of the T-shape in the central part of the cross-section orthogonal to the longitudinal direction of the light-guide bodies (21). In this way, a light source module in which generation of uneven brightness can be reduced, and electronic equipment having such a module can be provided.

Description

光源モジュール、及びそれを備えた電子機器Light source module and electronic device including the same
　本発明は、例えば液晶表示装置において、薄型化を図るために、光源からの光を導光板によって面状に出射させるサイドエッジ（サイドライトともいう）型導光板を備えたバックライトに用いられる光源モジュール、及びそれを備えた電子機器に関するものである。 The present invention relates to a light source used in a backlight including a side edge (also referred to as a sidelight) type light guide plate that emits light from a light source in a planar shape by a light guide plate, for example, in a liquid crystal display device. The present invention relates to a module and an electronic device including the module.
　近年、液晶表示装置においては、薄型化を図るために、光源からの光を導光板によって面状に出射させるサイドエッジ（サイドライトともいう）型導光板を備えたバックライトが多用されている。 In recent years, in order to reduce the thickness of a liquid crystal display device, a backlight having a side edge (also referred to as a sidelight) type light guide plate that emits light from a light source in a planar shape by a light guide plate is frequently used.
　このようなサイドエッジ型導光板として、例えば特許文献１に開示された照明装置がある。図２３（ａ）、図２３（ｂ）及び図２３（ｃ）に示すように、上記特許文献１に開示された照明装置１００は、一列に配列された複数の導光体１１１からなる導光板１１０と、導光板１１０の導光体１１１毎に設けられかつ導光体１１１に対して光を照射する複数の光源１０１とを有している。上記光源１０１は、１個の赤色ＬＥＤ（Light Emitting Diode：発光ダイオード）１０１Ｒと２個の緑色ＬＥＤ１０１Ｇと１個の青色ＬＥＤ１０１Ｂとからなっている。また、導光板１１０の下側には、反射シート１０２が設けられている。そして、隣り合う導光体１１１間に０．１μｍ以上の空気層からなる隙間１０３を形成している。この構成により、疑似インパルス型の表示を行うことができるものとなっている。 As such a side edge type light guide plate, for example, there is an illumination device disclosed in Patent Document 1. As shown in FIGS. 23 (a), 23 (b), and 23 (c), the illumination device 100 disclosed in Patent Document 1 is a light guide plate including a plurality of light guides 111 arranged in a line. 110 and a plurality of light sources 101 provided for each light guide 111 of the light guide plate 110 and irradiating light to the light guide 111. The light source 101 is composed of one red LED (Light Emitting Diode) 101R, two green LEDs 101G, and one blue LED 101B. A reflective sheet 102 is provided below the light guide plate 110. A gap 103 made of an air layer of 0.1 μm or more is formed between the adjacent light guides 111. With this configuration, pseudo-impulse display can be performed.
　また、例えば、特許文献２にも、同種の発光体構造が開示されている。 For example, Patent Document 2 also discloses the same type of light emitter structure.
日本国公開特許公報「特開２００８－３４３７２号公報（２００８年２月１４日公開）」Japanese Patent Publication “Japanese Patent Laid-Open No. 2008-34372 (published on Feb. 14, 2008)” 日本国公開特許公報「特開２００９－４３７０６号公報（２００９年２月２８日公開）」Japanese Patent Publication “Japanese Unexamined Patent Application Publication No. 2009-43706 (published February 28, 2009)”
　ところで、上記従来の構成の光源モジュールにおいては、導光体１１１間の隙間１０３は、導光体１１１の熱膨張及び製造公差を考慮すると１～２ｍｍ程度が必要である。 By the way, in the light source module having the conventional configuration, the gap 103 between the light guides 111 needs to be about 1 to 2 mm in consideration of thermal expansion and manufacturing tolerance of the light guide 111.
　しかしながら、この長さの隙間１０３を確保すると、図２４に示すように、隙間１０３に輝度ムラが発生するという問題点を有している。 However, if the gap 103 having this length is secured, there is a problem that luminance unevenness occurs in the gap 103 as shown in FIG.
　この理由を、導光体１１１から光を出射させる仕組みを示した図２５に基づいて説明する。 This reason will be described with reference to FIG. 25 showing a mechanism for emitting light from the light guide 111.
　図２５において破線矢印にて示すように、導光体１１１中を進む光は、光散乱体１１２と衝突することにより導光体１１１中を進む角度が変わり、全反射条件が破られ、出射面１１１ａ又は該出射面１１１ａと対向する対向面１１１ｂから導光体１１１外に出射する。ここで、対向面１１１ｂと反射シート１０２との間隔が実質上小さいと、図１９において実線矢印にて示すように、導光体１１１の対向面１１１ｂから出射した光は、反射シート１０２にて反射された後、導光体１１１に再入射し、側壁面１１１ｃにて反射された後、出射面１１１ａから再出射する。 As shown by the broken line arrows in FIG. 25, the light traveling in the light guide 111 changes the angle of traveling in the light guide 111 by colliding with the light scatterer 112, the total reflection condition is broken, and the exit surface The light is emitted out of the light guide 111 from 111a or the opposite surface 111b facing the emission surface 111a. Here, when the distance between the facing surface 111b and the reflecting sheet 102 is substantially small, the light emitted from the facing surface 111b of the light guide 111 is reflected by the reflecting sheet 102 as shown by a solid arrow in FIG. Then, the light is incident again on the light guide 111, reflected by the side wall surface 111c, and then re-emitted from the emission surface 111a.
　この結果、拡散板１０４においては、導光体１１１・１１１間の隙間１０３上には光が届き難く、隙間１０３の直上が暗くなってしまう。したがって、輝度ムラが発生する。 As a result, in the diffusion plate 104, it is difficult for light to reach the gap 103 between the light guides 111 and 111, and the portion directly above the gap 103 becomes dark. Therefore, luminance unevenness occurs.
　本発明は、上記従来の問題点に鑑みなされたものであって、その目的は、輝度ムラの発生を低減し得る光源モジュール、及びそれを備えた電子機器を提供することにある。 The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a light source module capable of reducing the occurrence of uneven brightness and an electronic apparatus including the same.
　本発明の光源モジュールは、上記課題を解決するために、長手方向に対して並列にそれぞれ隙間を有して設けられた複数の導光体と、上記導光体における長手方向の少なくとも一方の端面から光をそれぞれ入射させる複数の光源と、上記導光体の内部にて導光される光を取り出すために該導光体における光の出射側、又はその反対側である反射シート側に複数設けられている光路変換部とを備えた光源モジュールにおいて、上記導光体における長手方向に直交する断面の少なくとも一方の側端部は、導光体における長手方向に直交する断面の他方の側端部又は中央部よりも薄く形成されていることを特徴としている。 In order to solve the above-described problem, the light source module of the present invention includes a plurality of light guides provided with a gap in parallel with each other in the longitudinal direction, and at least one end face of the light guide in the longitudinal direction. A plurality of light sources that respectively input light from the light guide, and a plurality of light sources provided on the light emission side of the light guide or the reflective sheet side opposite to the light guide to extract the light guided inside the light guide. In the light source module comprising the optical path conversion unit, at least one side end of the cross section orthogonal to the longitudinal direction of the light guide is the other side end of the cross section orthogonal to the longitudinal direction of the light guide Alternatively, it is characterized by being formed thinner than the central portion.
　上記の発明によれば、サイドエッジ（サイドライトともいう）型の光源モジュールにおいて、導光板を構成する複数の導光体が、長手方向に対して並列にそれぞれ隙間を有して設けられているので、隙間において光の照射が少なくなり、導光板全体として輝度ムラが生じる。 According to the above invention, in the side edge (also referred to as side light) type light source module, the plurality of light guides constituting the light guide plate are provided in parallel with each other in the longitudinal direction. As a result, light irradiation is reduced in the gap, resulting in uneven brightness in the entire light guide plate.
　しかし、本発明では、導光体における長手方向に直交する断面の少なくとも一方の側端部は、導光体における長手方向に直交する断面の他方の側端部又は中央部よりも薄く形成されている。このため、各側端部では、導光体の欠損部ができることになる。 However, in the present invention, at least one side end of the cross section perpendicular to the longitudinal direction of the light guide is formed thinner than the other side end or center of the cross section perpendicular to the longitudinal direction of the light guide. Yes. For this reason, the defect part of a light guide is made in each side edge part.
　この構成により、導光体の少なくとも一方の側端部では、導光体から出射した光、又はその光の反射シートでの反射光が導光体の欠損部を通過することによって、導光体に再入射することなく、導光体間の隙間を照らすことができる。 With this configuration, at least one side end portion of the light guide body is configured such that light emitted from the light guide body or light reflected by the reflection sheet of the light passes through the defect portion of the light guide body. It is possible to illuminate the gap between the light guides without re-entering the light.
　したがって、隙間での輝度が不足するのを回避することができ、輝度ムラの発生を低減し得る光源モジュールを提供することができる。 Therefore, it is possible to avoid a shortage of luminance in the gap and to provide a light source module that can reduce the occurrence of luminance unevenness.
　本発明の電子機器は、上記課題を解決するために、上記記載の光源モジュールを備えていることを特徴としている。 In order to solve the above-described problems, an electronic device according to the present invention includes the light source module described above.
　上記の発明によれば、輝度ムラの発生を低減し得る光源モジュールを備えた電子機器を提供することができる。 According to the above invention, it is possible to provide an electronic device including a light source module that can reduce the occurrence of uneven brightness.
　本発明の光源モジュールは、以上のように、導光体における長手方向に直交する断面の少なくとも一方の側端部は、導光体における長手方向に直交する断面の他方の側端部又は中央部よりも薄く形成されているものである。 As described above, in the light source module of the present invention, at least one side end of the cross section orthogonal to the longitudinal direction of the light guide is the other side end or center of the cross section orthogonal to the longitudinal direction of the light guide. It is formed thinner than that.
　また、本発明の電子機器は、以上のように、上記記載の光源モジュールを備えているものである。 Further, as described above, the electronic apparatus of the present invention includes the light source module described above.
　それゆえ、輝度ムラの発生を低減し得る光源モジュール、及びそれを備えた電子機器を提供するという効果を奏する。 Therefore, there is an effect of providing a light source module that can reduce the occurrence of uneven brightness and an electronic device including the light source module.
本発明における光源モジュールの実施の一形態を示すものであって、導光板を構成する複数の導光体における端部での光路を示す断面図である。1 is a cross-sectional view illustrating an embodiment of a light source module according to the present invention and illustrating optical paths at end portions of a plurality of light guides constituting a light guide plate. 上記光源モジュールを備えた液晶表示装置の構成を示す分解斜視図である。It is a disassembled perspective view which shows the structure of the liquid crystal display device provided with the said light source module. 上記光源モジュールを備えた液晶表示装置における一部の構成を示す断面図である。It is sectional drawing which shows a part of structure in a liquid crystal display device provided with the said light source module. 上記光源モジュールにおける導光板の構成を示す平面図である。It is a top view which shows the structure of the light-guide plate in the said light source module. 上記光源モジュールにおける導光板の構成を示す側面図である。It is a side view which shows the structure of the light-guide plate in the said light source module. （ａ）は上記光源モジュールにおける導光板の構成を示す側面図であり、（ｂ）は導光板の出射側面に配設された光散乱体の印刷パターンを示す平面図である。(A) is a side view which shows the structure of the light-guide plate in the said light source module, (b) is a top view which shows the printing pattern of the light-scattering body arrange | positioned at the output side surface of the light-guide plate. 上記導光板を備えた光源モジュールの効果確認結果を、導光体の位置と輝度との関係において示すグラフである。It is a graph which shows the effect confirmation result of the light source module provided with the said light-guide plate in the relationship between the position of a light guide, and a brightness | luminance. 上記導光板を備えた光源モジュールの変形例を示すものであって、出射側に欠損部を有する複数の導光体における端部での光路を示す断面図である。It is a sectional view showing a modification of a light source module provided with the above-mentioned light guide plate, and showing an optical path in an end in a plurality of light guides which have a deficit part on the outgoing side. 本発明における光源モジュールの他の実施の形態を示すものであって、キャタピラ型導光体の構成を示す側面図である。The other embodiment of the light source module in this invention is shown, Comprising: It is a side view which shows the structure of a caterpillar type light guide. （ａ）は上記キャタピラ型導光体の出射側面に配設された光散乱体の印刷パターンを示す平面図であり、（ｂ）は上記平面図に対応するキャタピラ型導光体の構成を示す側面図である。(A) is a top view which shows the printing pattern of the light-scattering body arrange | positioned at the output side surface of the said caterpillar type light guide, (b) shows the structure of the caterpillar type light guide corresponding to the said top view. It is a side view. 本発明における光源モジュールのさらに他の実施の形態を示すものであって、導光体の構成を示す側面図である。FIG. 11 is a side view showing still another embodiment of the light source module according to the present invention and showing the configuration of the light guide. （ａ）は上記導光体における変形例の構成を示す側面図であり、（ｂ）は上記導光体における他の変形例の構成を示す側面図である。(A) is a side view which shows the structure of the modification in the said light guide, (b) is a side view which shows the structure of the other modification in the said light guide. （ａ）は本発明における光源モジュールのさらに他の実施の形態を示すものであって、湾曲状面取りを有する導光体の構成を示す側面図であり、（ｂ）は湾曲状面取りを有しない導光体の構成を示す側面図である。(A) shows other embodiment of the light source module in this invention, Comprising: It is a side view which shows the structure of the light guide which has a curved chamfering, (b) does not have a curved chamfering. It is a side view which shows the structure of a light guide. （ａ）は先端角湾曲面取り部を有する導光体と先端角湾曲面取り部を有しない矩形断面の導光体との比較において光源モジュールの表示状態を示す平面図であり、（ｂ）は先端角湾曲面取り部を有する導光体と先端角湾曲面取り部を有しない矩形断面の導光体との比較において光源モジュールの位置と輝度との関係を示すグラフである。(A) is a top view which shows the display state of a light source module in the comparison with the light guide which has a front-end | tip angle curve chamfering part, and the light guide of the rectangular cross section which does not have a front-end | tip angle curve chamfer. It is a graph which shows the relationship between the position of a light source module, and a brightness | luminance in the comparison with the light guide which has a rectangular curved chamfered part, and the light guide of the rectangular cross section which does not have a front-end | tip curved curved chamfered part. （ａ）は導光体から光を出射させるときの光路について、先端角湾曲面取り部を有する導光体と先端角湾曲面取り部を有しない矩形断面の導光体との比較実験を行う場合における光源の発光位置を示す導光体の断面図であり、（ｂ）は先端角湾曲面取り部を有しない矩形断面の導光体での光路を示す導光体の断面図であり、（ｃ）は先端角湾曲面取り部を有する導光体での光路を示す導光体の断面図であり、（ｄ）は先端角円形面取り部を有する導光体での光路を示す導光体の断面図である。(A) is a case where a comparison experiment is made between a light guide having a tip angle curved chamfered portion and a light guide having a rectangular cross section without a tip angle curved chamfered portion with respect to an optical path when light is emitted from the light guide. It is sectional drawing of the light guide which shows the light emission position of a light source, (b) is sectional drawing of the light guide which shows the optical path in the light guide of the rectangular cross section which does not have a tip angle curve chamfer part, (c) FIG. 4 is a cross-sectional view of a light guide showing a light path in a light guide having a tip angle curved chamfered portion, and FIG. 4D is a cross-sectional view of the light guide showing a light path in a light guide having a tip angle circular chamfered portion. It is. 本発明における光源モジュールのさらに他の実施の形態を示すものであって、湾曲状面取り及び隅角部における面取りを有する導光体の構成を示す側面図である。FIG. 14 is a side view showing still another embodiment of the light source module according to the present invention and showing a configuration of a light guide body having a curved chamfer and a chamfer at a corner portion. 本発明における光源モジュールのさらに他の実施の形態を示すものであって、片方の側端部にのみ欠損部を有する導光体の構成を示す側面図である。FIG. 10 is a side view showing still another embodiment of the light source module according to the present invention and showing a configuration of a light guide body having a defect portion only at one side end portion. 上記導光体の変形例を示すものであって、片方の側端部にのみ欠損部を有するキャタピラ構造の導光体の構成を示す側面図である。It is a side view which shows the modification of the said light guide, Comprising: The structure of the light guide of a caterpillar structure which has a defect | deletion part only in one side edge part. 本発明における光源モジュールのさらに他の実施の形態を示すものであって、上記光源モジュールを備えた液晶表示装置の構成を示す分解斜視図である。FIG. 14 is a disassembled perspective view showing still another embodiment of the light source module according to the present invention and showing a configuration of a liquid crystal display device including the light source module. 上記光源モジュールを備えた液晶表示装置における一部の構成を示す断面図である。It is sectional drawing which shows a part of structure in a liquid crystal display device provided with the said light source module. 上記光源モジュールにおける導光板の取り付け構造を示す断面図である。It is sectional drawing which shows the attachment structure of the light-guide plate in the said light source module. （ａ）は上記導光体の構成を示す側面図であり、（ｂ）は上記導光体のシャーシ側面に配設された光散乱体の印刷パターンを示す平面図である。(A) is a side view which shows the structure of the said light guide, (b) is a top view which shows the printing pattern of the light-scattering body arrange | positioned at the chassis side surface of the said light guide. 従来の光源モジュールの構成を示す平面図である。It is a top view which shows the structure of the conventional light source module. 上記光源モジュールの構成を示す正面図である。It is a front view which shows the structure of the said light source module. 図２３（ａ）のＡ－Ａ’線断面図である。FIG. 24 is a cross-sectional view taken along the line A-A ′ of FIG. 上記従来の光源モジュールにおける導光体間に発生する輝度ムラを示す平面図である。It is a top view which shows the brightness nonuniformity which generate | occur | produces between the light guides in the said conventional light source module. 上記光源モジュールの導光体における端部での光路を示す断面図である。It is sectional drawing which shows the optical path in the edge part in the light guide of the said light source module.
　　〔実施の形態１〕
　本発明の一実施形態について図１～図８に基づいて説明すれば、以下のとおりである。 [Embodiment 1]
An embodiment of the present invention will be described below with reference to FIGS.
　本実施の形態の光源モジュール１０を備えた電子機器としての例えば液晶表示装置１Ａは、図２に示すように、下から順に、シャーシ２、光源モジュール１０、液晶パネル３、ベゼル４にて構成されており、光源モジュール１０は、反射板としての反射シート１１、光源としてのＬＥＤ（Light Emitting Diode：発光ダイオード）１２及びＬＥＤ基板１３、リフレクタ１４、導光板２０、拡散板１５、並びに光学シート群１６から構成されている。尚、光学シート群１６は、本発明においては存在しなくてもよい。 For example, a liquid crystal display device 1A as an electronic apparatus including the light source module 10 according to the present embodiment includes a chassis 2, a light source module 10, a liquid crystal panel 3, and a bezel 4 in order from the bottom as shown in FIG. The light source module 10 includes a reflection sheet 11 as a reflection plate, an LED (Light-Emitting Diode) 12 and LED substrate 13 as a light source, a reflector 14, a light guide plate 20, a diffusion plate 15, and an optical sheet group 16. It is composed of Note that the optical sheet group 16 may not exist in the present invention.
　上記ＬＥＤ１２及びＬＥＤ基板１３、並びにリフレクタ１４は、図３に示すように、導光板２０の端部に設けられ、これによって、ＬＥＤ１２からの光を導光板２０における一方の端面２１ａに入射し、導光板２０の出射面２１ｄから拡散板１５及び光学シート群１６を通して、液晶パネル３に光を照射するようになっている。したがって、本実施の形態の光源モジュール１０は、サイドエッジ（サイドライトともいう）方式を採用している。 As shown in FIG. 3, the LED 12, the LED substrate 13, and the reflector 14 are provided at the end portion of the light guide plate 20, so that light from the LED 12 is incident on one end surface 21 a of the light guide plate 20 and guided. The liquid crystal panel 3 is irradiated with light from the exit surface 21 d of the light plate 20 through the diffusion plate 15 and the optical sheet group 16. Therefore, the light source module 10 of the present embodiment employs a side edge (also referred to as side light) method.
　ところで、液晶表示装置１Ａにおいては、ＣＲＴ（Cathode-Ray Tube：陰極線管）表示装置と比較して、動画のボヤケという問題点がある。すなわち、ＣＲＴ表示装置においては、あるフレームにおける画素の発光期間と、次のフレームにおけるこの画素の発光期間との間に、この画素が発光しない非発光期間があるため、残像感が少ない。これに対して、液晶表示装置１Ａの表示方式はこのような非発光期間がない「ホールド型」であるため、残像感が生じ、この残像感が使用者に動画のボヤケとして認識される。 By the way, the liquid crystal display device 1A has a problem of blurring of a moving image as compared with a CRT (Cathode-Ray® Tube) display device. That is, in the CRT display device, since there is a non-light emission period in which this pixel does not emit light between the light emission period of the pixel in a certain frame and the light emission period of this pixel in the next frame, there is little afterimage feeling. On the other hand, since the display method of the liquid crystal display device 1A is a “hold type” that does not have such a non-light emission period, an afterimage feeling is generated, and this afterimage feeling is recognized by the user as blurring of moving images.
　そこで、バックライト型の液晶表示装置１Ａにおいては、バックライトである光源モジュール１０を分割し、液晶パネル３に映像信号を印加するタイミングに同期して順次消灯することにより、画像表示と画像表示との間に黒表示を挿入する技術であるバックライトブリンキングが提案されている。これにより、疑似インパルス型の表示を実現し、残像感を抑え、消費電力を低減することができる。 Therefore, in the backlight type liquid crystal display device 1A, the light source module 10 which is a backlight is divided and sequentially turned off in synchronization with the timing of applying the video signal to the liquid crystal panel 3, thereby displaying images and images. Backlight blinking, which is a technique for inserting a black display between them, has been proposed. Thereby, pseudo-impulse type display can be realized, the afterimage feeling can be suppressed, and the power consumption can be reduced.
　本実施の形態の光源モジュール１０は、このバックライトブリンキングを行うために、図４に示すように、導光板２０を複数の導光体２１…にて分割して構成し、これら複数の導光体２１…を、長手方向に対して並列にそれぞれ隙間２２を有して配設している。したがって、本実施の形態では、図３に示すように、ＬＥＤ１２は、各導光体２１における長手方向の一方の端面２１ａにおける後述するＴ字厚肉部２１ｃから光をそれぞれ入射させるようになっている。尚、必ずしも一方の端面２１ａに限らず、長手方向の他方の端面から入射させてもよく、さらに、一方の端面２１ａ及び他方の端面の両方から光を入射させてもよい。すなわち、本発明では、少なくとも一方の端面２１ａから光を入射させれば足りる。 In order to perform the backlight blinking, the light source module 10 according to the present embodiment is configured by dividing the light guide plate 20 by a plurality of light guides 21 as shown in FIG. The bodies 21 are arranged with gaps 22 in parallel with each other in the longitudinal direction. Therefore, in the present embodiment, as shown in FIG. 3, the LED 12 is configured to make light incident from a T-shaped thick portion 21 c described later on one end surface 21 a in the longitudinal direction of each light guide 21. Yes. In addition, it is not necessarily limited to one end surface 21a, but may be incident from the other end surface in the longitudinal direction, and light may be incident from both one end surface 21a and the other end surface. That is, in the present invention, it is sufficient that light is incident from at least one end face 21a.
　ところで、導光板２０を複数の導光体２１に分割して長手方向に対して並列に配列する場合に、導光体２１の熱膨張及び製造公差を考慮すると、隙間２２として１～２ｍｍ程度が必要である。 By the way, when the light guide plate 20 is divided into a plurality of light guides 21 and arranged in parallel in the longitudinal direction, the clearance 22 is about 1 to 2 mm in consideration of thermal expansion and manufacturing tolerances. is necessary.
　しかしながら、この長さの隙間２２を確保すると、背景技術での図面である図１８に示すように、隙間２２に輝度ムラが発生するという問題点を有している。 However, when the gap 22 having this length is secured, there is a problem that luminance unevenness occurs in the gap 22 as shown in FIG.
　そこで、本実施の形態では、この隙間２２における輝度ムラの発生を防止するために、図５に示すように、隣り合う導光体２１・２１の互いに対向する側端部としてのＴ字薄肉部２１ｂ・２１ｂは、それぞれ、導光体２１における長手方向に直交する断面の中央部としてのＴ字厚肉部２１ｃよりも薄く形成されている。この結果、本実施の形態の導光体２１は、側端部において出射側又は反射シート側に欠損部２１ｆを有して断面Ｔ字状となっており、厚く形成されたＴ字厚肉部２１ｃと薄く形成されたＴ字薄肉部２１ｂ・２１ｂとからなっている。 Therefore, in this embodiment, in order to prevent the occurrence of luminance unevenness in the gap 22, as shown in FIG. 5, the T-shaped thin portion as the side end portions of the adjacent light guides 21 and 21 facing each other. Each of 21b and 21b is formed thinner than the T-shaped thick portion 21c as the central portion of the cross section orthogonal to the longitudinal direction of the light guide 21. As a result, the light guide 21 of the present embodiment has a T-shaped cross section with a missing portion 21f on the emission side or the reflection sheet side at the side end, and is formed thickly. 21c and thinly formed T-shaped thin portions 21b and 21b.
　上記のＴ字薄肉部２１ｂ・２１ｂにおける薄く形成されている部分のＴ字厚肉部２１ｃ側への長さは、少なくとも、導光体２１のＴ字厚肉部２１ｃの厚さ以上であることが好ましい。つまり、導光体２１のＴ字厚肉部２１ｃの厚さに対して、１：１以上の長さが薄い部分であることが好ましい。これにより、側端部としてのＴ字薄肉部２１ｂから出射した光にて、隣接する導光体２１・２１におけるＴ字薄肉部２１ｂ・２１ｂの各側壁面２１ｇ・２１ｇ間の隙間２２を効率よく照射することができる。 The length of the thinly formed portions of the T-shaped thin portions 21b and 21b toward the T-shaped thick portion 21c is at least equal to or greater than the thickness of the T-shaped thick portion 21c of the light guide 21. Is preferred. That is, it is preferable that the length is 1: 1 or more with respect to the thickness of the T-shaped thick portion 21c of the light guide 21. Thereby, with the light radiate | emitted from the T-shaped thin part 21b as a side edge part, the clearance gap 22 between each side wall surface 21g * 21g of the T-shaped thin part 21b * 21b in the adjacent light guide 21 * 21 is efficiently made. Can be irradiated.
　上記の構成により輝度ムラの発生を防止できる原理について、図１に基づいて説明する。図１は輝度ムラの発生を防止できる原理を示す断面図である。 The principle of preventing the occurrence of luminance unevenness by the above configuration will be described with reference to FIG. FIG. 1 is a cross-sectional view showing the principle capable of preventing the occurrence of luminance unevenness.
　まず、図１において破線矢印にて示すように、導光体２１中を進む光は、光路変換部としての光散乱体２３と衝突することにより導光体２１中を進む角度が変わり、全反射条件が破られ、出射面２１ｄから導光体２１外に出射し、拡散板１５に向かう。しかし、この光路では、拡散板１５において、隙間２２の中央部までは光が届かない。 First, as shown by a broken line arrow in FIG. 1, the light traveling in the light guide 21 changes the angle of traveling in the light guide 21 by colliding with the light scatterer 23 as an optical path changing unit, and is totally reflected. The condition is broken, and the light exits from the light exit surface 21 d to the outside of the light guide 21 and travels toward the diffusion plate 15. However, in this optical path, light does not reach the center of the gap 22 in the diffusion plate 15.
　これに対して、本実施の形態では、導光体２１のＴ字薄肉部２１ｂ・２１ｂを薄く形成しているので、隙間２２付近では、Ｔ字薄肉部２１ｂ・２１ｂにおける出射面２１ｄと対向する面である対向面２１ｅと反射シート１１との間に大きな間隔を設けることができる。つまり、Ｔ字薄肉部２１ｂ・２１ｂの下側は欠損部２１ｆとなっている。この結果、図１において実線矢印にて示すように、導光体２１におけるＴ字薄肉部２１ｂ・２１ｂの対向面２１ｅから出射した光は、反射シート１１にて反射され、導光体２１に再入射することなく、拡散板１５における、導光体２１・２１間の隙間２２を照らすことができる。したがって、隙間２２でのムラが発生し難い。 On the other hand, in this embodiment, since the T-shaped thin portions 21b and 21b of the light guide 21 are formed thin, in the vicinity of the gap 22, they face the emission surface 21d in the T-shaped thin portions 21b and 21b. A large space can be provided between the opposing surface 21e, which is a surface, and the reflection sheet 11. That is, the lower side of the T-shaped thin portions 21b and 21b is a missing portion 21f. As a result, as shown by solid line arrows in FIG. 1, the light emitted from the opposing surfaces 21 e of the T-shaped thin portions 21 b and 21 b of the light guide 21 is reflected by the reflection sheet 11 and re-appears on the light guide 21. The gap 22 between the light guides 21 and 21 in the diffusion plate 15 can be illuminated without being incident. Therefore, unevenness in the gap 22 is unlikely to occur.
　ここで、上記光散乱体２３の配置について、図６（ａ）（ｂ）に基づいて説明する。図６（ａ）は本実施の形態の導光体２１の断面図であり、図６（ｂ）は本実施の形態の導光体２１の出射側面に設けられた光散乱体２３の印刷パターンを示す平面図である。 Here, the arrangement of the light scatterers 23 will be described with reference to FIGS. FIG. 6A is a cross-sectional view of the light guide 21 of the present embodiment, and FIG. 6B is a print pattern of the light scatterer 23 provided on the emission side surface of the light guide 21 of the present embodiment. FIG.
　図６（ａ）に示すように、本実施の形態の導光体２１は、例えば、出射側面の長さが２１ｍｍ、側端部であるＴ字薄肉部２１ｂの高さが２ｍｍ、中央部であるＴ字薄肉部２１ｂの高さが５ｍｍ、該Ｔ字薄肉部２１ｂの長さが９ｍｍとなっている。そして、導光体２１の出射側面には、図６（ｂ）に示すように、光散乱体２３が印刷パターンとして形成されている。 As shown in FIG. 6A, the light guide 21 of the present embodiment has, for example, a length of the emission side surface of 21 mm, a side end portion of the T-shaped thin portion 21b having a height of 2 mm, and a central portion. The height of a certain T-shaped thin portion 21b is 5 mm, and the length of the T-shaped thin portion 21b is 9 mm. And as shown in FIG.6 (b), the light-scattering body 23 is formed in the output side surface of the light guide 21 as a printing pattern.
　尚、本実施の形態では、例えば光散乱微粒子をポリマー中に分散させて印刷して光散乱体２３を形成しているが、必ずしもこれに限らず、他の方法で形成してもよい。例えば、光散乱粒子として蛍光体を用いてもよく、また、光散乱体２３を、プリズム等の微細な凹凸形状を形成してもよい。また、ブラスト等で出射側面又は反射シート側面に粗面を設けることによってパターンを形成することも可能である。 In the present embodiment, for example, light scattering particles are dispersed in a polymer and printed to form the light scatterer 23. However, the present invention is not limited to this, and other methods may be used. For example, a phosphor may be used as the light scattering particle, and the light scattering body 23 may be formed with a fine uneven shape such as a prism. It is also possible to form a pattern by providing a rough surface on the emission side surface or the reflection sheet side surface by blasting or the like.
　上記印刷パターンは、導光体２１の出射側面を例えば９分割して梯子状に形成されており、Ｔ字厚肉部２１ｃの中心を軸として左右対称となっている。図６（ｂ）から分かるように、本実施の形態では、印刷パターンは、長手方向に平行に奥に向かうに伴って光散乱体２３のパターン間隔が短くなっていると共に、導光体２１のＴ字薄肉部２１ｂにおける側端に向かうに伴ってピッチが短くなっている。この理由は、光源であるＬＥＤ１２から遠ざかるに伴って輝度が減衰するので、光源であるＬＥＤ１２から遠ざかるに伴って光散乱体２３の配置密度を高くする必要があるためである。 The printed pattern is formed in a ladder shape by dividing, for example, the emission side surface of the light guide 21 and is symmetric about the center of the T-shaped thick portion 21c. As can be seen from FIG. 6B, in the present embodiment, the printed pattern has a pattern interval of the light scatterers 23 that decreases in parallel with the longitudinal direction and the light guide 21. The pitch is shortened toward the side end of the T-shaped thin portion 21b. This is because the luminance decreases as the distance from the LED 12 as the light source increases, so that the arrangement density of the light scatterers 23 needs to be increased as the distance from the LED 12 as the light source increases.
　また、光散乱体２３を、ここでは線状としているが、必ずしも線状に特定する必要はなく、例えば、円形状、矩形状等の種々の形状が可能である。 Further, although the light scatterer 23 is linear here, it is not always necessary to specify the linear shape, and various shapes such as a circular shape and a rectangular shape are possible.
　尚、上記の説明では、光散乱体２３は、導光体２１の出射側面に形成されているが、必ずしもこれに限らず、導光体２１の反射シート側面に形成してもよい。これによっても、導光体２１の出射側面に光散乱体２３を形成した場合と同様の効果を得ることができる。ただし、導光体２１の薄肉部が形成された広い面に光散乱体２３を形成する方が好ましい。本実施の形態では、光散乱体２３を印刷パターンにて形成しているので、面積の広い方には凹凸がなく、印刷し易いためである。 In the above description, the light scatterer 23 is formed on the exit side surface of the light guide 21. However, the present invention is not limited to this, and the light scatterer 23 may be formed on the reflective sheet side surface of the light guide 21. Also by this, the same effect as the case where the light scatterer 23 is formed on the exit side surface of the light guide 21 can be obtained. However, it is preferable to form the light scattering body 23 on a wide surface where the thin portion of the light guide 21 is formed. In the present embodiment, since the light scatterer 23 is formed by a printing pattern, the wider area has no unevenness and is easy to print.
　上記の光源モジュール１０を用いた場合における輝度ムラの発生防止効果について、シミュレーションにて確認した結果を図７に示す。図７は、隙間２２を１ｍｍとしたときのシミュレーション結果を示すグラフである。縦軸は相対輝度、横軸は隙間２２の中心からの距離を示している。 FIG. 7 shows the results confirmed by simulation for the effect of preventing the occurrence of uneven brightness when the light source module 10 is used. FIG. 7 is a graph showing a simulation result when the gap 22 is 1 mm. The vertical axis represents relative luminance, and the horizontal axis represents the distance from the center of the gap 22.
　すなわち、図７において、白丸にて示す従来例では隙間２２における±０．５ｍｍの部分において１０％以上の輝度低下が発生しているのに対して、黒四角にて示す実施例では、隙間２２における±０．５ｍｍの部分において３％程度の輝度低下に抑えられていることがわかる。 That is, in FIG. 7, in the conventional example indicated by white circles, a luminance decrease of 10% or more occurs in the portion of ± 0.5 mm in the gap 22, whereas in the example indicated by black squares, the gap 22 It can be seen that a decrease in luminance of about 3% is suppressed in a portion of ± 0.5 mm.
　すなわち、本実施の形態のＴ字薄肉部２１ｂ・２１ｂを形成した導光体２１とすることによって、輝度ムラを防止できることが確認できた。 That is, it was confirmed that uneven brightness can be prevented by using the light guide 21 in which the T-shaped thin portions 21b and 21b of the present embodiment are formed.
　尚、本発明は、上記の実施の形態に限定されるものではなく、本発明の範囲内で種々の変更が可能である。例えば、上記の説明では、図１に示すように、導光体２１のＴ字薄肉部２１ｂ・２１ｂにおける反射シート１１側に欠損部２１ｆが設けられることにより、Ｔ字薄肉部２１ｂ・２１ｂがＴ字厚肉部２１ｃ・２１ｃよりも薄くなっていた。 Note that the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. For example, in the above description, as shown in FIG. 1, the T-shaped thin portions 21 b and 21 b are formed in the T-shaped thin portions 21 b and 21 b by providing the missing portions 21 f on the reflection sheet 11 side in the T-shaped thin portions 21 b and 21 b. It was thinner than the thick parts 21c and 21c.
　しかし、欠損部２１ｆは、必ずしも導光体２１の反射シート１１側に設ける必要はなく、例えば、図８に示すように、欠損部２１ｆを導光体２１の出射側に設けてもよい。また、欠損部２１ｆを、例えば、導光体２１における出射側面と反射シート側面との中間に設けてもよい。 However, the defect portion 21f is not necessarily provided on the reflection sheet 11 side of the light guide 21. For example, the defect portion 21f may be provided on the emission side of the light guide 21, as shown in FIG. Moreover, you may provide the defect | deletion part 21f in the middle of the output side surface in the light guide 21, and a reflective sheet side surface, for example.
　欠損部２１ｆを、図８に示すように、導光体２１の出射側に設けた場合、図８において破線矢印にて示すように、導光体２１のＴ字厚肉部２１ｃにおいては、導光体２１中を進む光は、光散乱体２３と衝突することにより導光体２１中を進む角度が変わり、全反射条件が破られ、出射面２１ｄから導光体２１外に出射し、拡散板１５に向かう。しかし、この光路では、図１の場合と同様に、拡散板１５において、隙間２２の中央部までは光が届かない。 When the missing portion 21f is provided on the light exit side of the light guide 21 as shown in FIG. 8, the guide 21 is guided in the T-shaped thick portion 21c of the light guide 21 as shown by a broken line arrow in FIG. The light traveling in the light body 21 collides with the light scatterer 23 to change the traveling angle in the light guide 21, the total reflection condition is broken, and the light exits from the light exit surface 21 d to the outside of the light guide 21, and is diffused. Head to board 15. However, in this optical path, light does not reach the central portion of the gap 22 in the diffusion plate 15 as in the case of FIG.
　一方、導光体２１のＴ字薄肉部２１ｂ・２１ｂにおける出射側に欠損部２１ｆが存在する場合には、隙間２２付近では、出射面２１ｄと拡散板１５との間に、欠損部２１ｆにて大きな間隔を設けることができる。この結果、図８において実線矢印にて示すように、導光体２１中を進む光は、光散乱体２３と衝突することにより導光体２１中を進む角度が変わり、全反射条件が破られ、対向面２１ｅに設けられた反射シート１１にて反射し、Ｔ字薄肉部２１ｂの出射面２１ｄから導光体２１外に出射する。この結果、拡散板１５において、導光体２１・２１間の隙間２２の上方を照らし易くすることができる。したがって、隙間２２でのムラが発生し難い。 On the other hand, when the defect portion 21f is present on the exit side of the T-shaped thin portions 21b and 21b of the light guide 21, near the gap 22, the defect portion 21f is located between the exit surface 21d and the diffusion plate 15. Large spacing can be provided. As a result, as shown by the solid line arrow in FIG. 8, the light traveling in the light guide 21 changes the angle of traveling in the light guide 21 by colliding with the light scatterer 23, and the total reflection condition is broken. Then, the light is reflected by the reflection sheet 11 provided on the facing surface 21e, and is emitted to the outside of the light guide 21 from the emission surface 21d of the T-shaped thin portion 21b. As a result, it is possible to easily illuminate the upper part of the gap 22 between the light guides 21 and 21 in the diffusion plate 15. Therefore, unevenness in the gap 22 is unlikely to occur.
　尚、欠損部２１ｆを導光体２１における出射側面又は反射シート１１側面の中間に設けても同様の作用効果を有する。 In addition, even if it provides the defect | deletion part 21f in the middle of the output side surface in the light guide 21, or the reflective sheet 11 side surface, it has the same effect.
　また、本実施の形態では、拡散板１５は、導光体２１の出射面２１ｄとは例えば２ｍｍの間隔Ｄを有してその上方に設けられている。これにより、拡散板１５を導光体２１の出射面２１ｄに密着する場合に比べて、輝度ムラを低減することができる。 Further, in the present embodiment, the diffusion plate 15 is provided above the light exit surface 21d of the light guide 21 with a distance D of, for example, 2 mm. Thereby, compared with the case where the diffuser plate 15 is brought into close contact with the light exit surface 21d of the light guide 21, luminance unevenness can be reduced.
　このように、本実施の形態の光源モジュール１０は、長手方向に対して並列にそれぞれ隙間２２を有して設けられた複数の導光体２１…と、導光体２１における長手方向の少なくとも一方の端面２１ａから光をそれぞれ入射させる複数のＬＥＤ１２と、導光体２１の内部にて導光される光を取り出すために導光体２１における光の出射側、又はその反対側である反射シート１１側に複数設けられている光路変換部としての光散乱体２３とを備えている。そして、導光体２１における長手方向に直交する断面の各側端部としてのＴ字薄肉部２１ｂ・２１ｂは、導光体２１における長手方向に直交する断面の中央部としてのＴ字厚肉部２１ｃよりも薄く形成されている。 As described above, the light source module 10 according to the present embodiment includes a plurality of light guides 21 provided with the gaps 22 in parallel to the longitudinal direction, and at least one of the light guides 21 in the longitudinal direction. A plurality of LEDs 12 that respectively enter light from the end face 21a of the light guide 21 and the reflection sheet 11 that is the light emission side of the light guide 21 or the opposite side to extract the light guided inside the light guide 21 And a plurality of light scatterers 23 as optical path conversion units provided on the side. And T-shaped thin part 21b * 21b as each side edge part of the cross section orthogonal to the longitudinal direction in the light guide 21 is T-shaped thick part as the center part of the cross section orthogonal to the longitudinal direction in the light guide 21 It is formed thinner than 21c.
　すなわち、サイドエッジ（サイドライトともいう）型の光源モジュール１０において、導光板２０を構成する複数の導光体２１が、長手方向に対して並列にそれぞれ隙間２２を有して設けられているので、隙間２２において光の照射が少なくなり、導光板全体として輝度ムラが生じる。 That is, in the side edge (also referred to as side light) type light source module 10, a plurality of light guides 21 constituting the light guide plate 20 are provided with gaps 22 in parallel with each other in the longitudinal direction. In the gap 22, light irradiation is reduced, and luminance unevenness occurs in the entire light guide plate.
　しかし、本実施の形態では、導光体２１における長手方向に直交する断面の各Ｔ字薄肉部２１ｂ・２１ｂは、導光体２１における長手方向に直交する断面のＴ字厚肉部２１ｃ・２１ｃよりも薄く形成されている。このため、各Ｔ字薄肉部２１ｂ・２１ｂでは、導光体２１の欠損部２１ｆができることになる。 However, in the present embodiment, the T-shaped thin portions 21b and 21b having a cross section orthogonal to the longitudinal direction of the light guide 21 are formed into the T-shaped thick portions 21c and 21c having a cross section orthogonal to the longitudinal direction of the light guide 21. It is formed thinner than. For this reason, in each T-shaped thin part 21b and 21b, the missing part 21f of the light guide 21 is formed.
　この構成により、導光体２１の各Ｔ字薄肉部２１ｂ・２１ｂでは、導光体２１から出射した光、又はその光の反射シート１１での反射光が導光体２１の欠損部２１ｆを通過することによって、導光体２１に再入射することなく、導光体２１・２１間の隙間２２を照らすことができる。 With this configuration, in each of the T-shaped thin portions 21 b and 21 b of the light guide 21, the light emitted from the light guide 21 or the reflected light of the light on the reflection sheet 11 passes through the missing portion 21 f of the light guide 21. By doing so, the gap 22 between the light guides 21 and 21 can be illuminated without re-entering the light guide 21.
　したがって、隙間２２での輝度が不足するのを回避することができ、輝度ムラの発生を低減し得る光源モジュール１０を提供することができる。 Therefore, it is possible to provide the light source module 10 that can avoid insufficient brightness in the gap 22 and reduce the occurrence of uneven brightness.
　また、本実施の形態の光源モジュール１０では、導光体２１の各Ｔ字薄肉部２１ｂ・２１ｂは、該Ｔ字薄肉部２１ｂ・２１ｂの反射シート１１側に欠損部２１ｆが設けられていることにより薄く形成されている。 Further, in the light source module 10 of the present embodiment, the T-shaped thin portions 21b and 21b of the light guide 21 are provided with the missing portions 21f on the reflective sheet 11 side of the T-shaped thin portions 21b and 21b. It is formed thinner.
　これにより、導光体２１の各Ｔ字薄肉部２１ｂ・２１ｂでは、導光体２１から出射した光の反射板としての反射シート１１での反射光が導光体２１の欠損部２１ｆを通過することによって、導光体２１に再入射することなく、導光体２１・２１間の隙間２２を照らすことになる。 Thereby, in each T character thin part 21b * 21b of the light guide 21, the reflected light in the reflective sheet 11 as a reflecting plate of the light radiate | emitted from the light guide 21 passes the defect | deletion part 21f of the light guide 21. FIG. Thus, the gap 22 between the light guides 21 and 21 is illuminated without reentering the light guide 21.
　また、本実施の形態の光源モジュール１０では、導光体２１の各Ｔ字薄肉部２１ｂ・２１ｂは、該導光体２１の出射側に欠損部２１ｆが設けられていることにより薄く形成されているとすることが可能である。 Further, in the light source module 10 according to the present embodiment, the T-shaped thin portions 21b and 21b of the light guide 21 are formed thin by providing the missing portion 21f on the emission side of the light guide 21. It is possible to be.
　これにより、導光体２１の各Ｔ字薄肉部２１ｂ・２１ｂでは、導光体２１から出射した光が導光体２１の欠損部２１ｆを通過することによって、導光体２１に再入射することなく、導光体２１・２１間の隙間を照らすことができる。 Thereby, in each T-shaped thin part 21b * 21b of the light guide 21, the light radiate | emitted from the light guide 21 passes through the defect | deletion part 21f of the light guide 21, and reenters the light guide 21. The gap between the light guides 21 and 21 can be illuminated.
　また、本実施の形態の光源モジュール１０では、光路変換部としての光散乱体２３は、導光体２１の各Ｔ字薄肉部２１ｂ・２１ｂの出射側又は反射シート１１側での配設密度が該導光体２１のＴ字厚肉部２１ｃの出射側又は反射シート１１側での配設密度よりも高密度となるように配設されている。 Moreover, in the light source module 10 of this Embodiment, the light-scattering body 23 as an optical path conversion part has the arrangement | positioning density in the output side of each T-shaped thin part 21b * 21b of the light guide 21, or the reflective sheet 11 side. It arrange | positions so that it may become a density higher than the arrangement | positioning density in the output side of the T-shaped thick part 21c of this light guide 21, or the reflection sheet 11 side.
　すなわち、導光体２１の各Ｔ字薄肉部２１ｂ・２１ｂは、導光体２１のＴ字厚肉部２１ｃに比べてＬＥＤ１２からの光量が少ない。このため、光散乱体２３を、導光体２１の各Ｔ字薄肉部２１ｂ・２１ｂの出射側又は反射シート１１側での配設密度が導光体２１のＴ字厚肉部２１ｃの出射側又は反射シート１１側での配設密度よりも高密度となるように配設することによって、導光体２１の各Ｔ字薄肉部２１ｂ・２１ｂの出射側又は反射シート１１側からの出射光を増加させることができる。 That is, the T-shaped thin portions 21 b and 21 b of the light guide 21 have a smaller amount of light from the LED 12 than the T-shaped thick portions 21 c of the light guide 21. For this reason, the light scatterer 23 is arranged on the emission side of the T-shaped thin portions 21b and 21b of the light guide 21 or on the reflection sheet 11 side, and the emission density of the T-shaped thick portion 21c of the light guide 21 Alternatively, the light emitted from the emission side of each of the T-shaped thin portions 21b and 21b of the light guide 21 or the reflection sheet 11 side is arranged by being arranged so as to have a higher density than the arrangement density on the reflection sheet 11 side. Can be increased.
　また、本実施の形態の光源モジュール１０では、光散乱体２３は、導光体２１の出射側又は反射シート１１側のうち欠損部２１ｆが存在しない面に設けられている。これにより、光散乱体２３を印刷によりパターン配置する場合に、導光体２１の出射側又は反射シート１１側のうち、凹凸のない平滑な平面に印刷することができる。 Further, in the light source module 10 of the present embodiment, the light scatterer 23 is provided on the surface on the exit side of the light guide 21 or the reflective sheet 11 side where the missing portion 21f does not exist. Thereby, when the light-scattering body 23 is pattern-arranged by printing, it can be printed on a smooth flat surface having no irregularities on the light-emitting body 21 side or the reflective sheet 11 side.
　また、本実施の形態の光源モジュール１０では、導光体２１の上方には、導光体２１から出射された光を拡散させる拡散板１５が該導光体２１の出射側面から間隔Ｄを有して設けられている。 Further, in the light source module 10 of the present embodiment, a diffusion plate 15 for diffusing light emitted from the light guide 21 is spaced above the light guide 21 by a distance D from the emission side surface of the light guide 21. Is provided.
　すなわち、複数の導光体２１…が、長手方向に対して並列にそれぞれ隙間２２を有して設けられている導光板２０においては、上述したように、導光体２１における長手方向に直交する断面の各Ｔ字薄肉部２１ｂ・２１ｂを、導光体２１における長手方向に直交する断面のＴ字厚肉部２１ｃよりも薄く形成することにより、隙間２２での輝度ムラの発生を低減することができる。 That is, in the light guide plate 20 in which the plurality of light guides 21 are provided with the gaps 22 in parallel with each other in the longitudinal direction, as described above, they are orthogonal to the longitudinal direction of the light guide 21. By forming the T-shaped thin portions 21b and 21b of the cross section thinner than the T-shaped thick portion 21c of the cross section perpendicular to the longitudinal direction of the light guide 21, the occurrence of luminance unevenness in the gap 22 is reduced. Can do.
　このとき、導光体２１の上方に拡散板１５を配置する場合に、拡散板１５を導光体２１から遠ざける方が、輝度ムラは目立たなくなる。したがって、拡散板１５を導光体２１の出射側面に密着して配置するよりも拡散板１５を導光体２１の出射側面から間隔Ｄ（≠０）を有して設けることによって、輝度ムラの発生を低減することができる。 At this time, when the diffusion plate 15 is disposed above the light guide 21, the brightness unevenness is less noticeable when the diffusion plate 15 is moved away from the light guide 21. Therefore, by providing the diffusing plate 15 with a distance D (≠ 0) from the emitting side surface of the light guide 21 rather than arranging the diffusing plate 15 in close contact with the emitting side surface of the light guide 21, luminance unevenness can be reduced. Generation can be reduced.
　また、本実施の形態の電子機器としての液晶表示装置１Ａは、本実施の形態の光源モジュール１０を備えている。これにより、輝度ムラの発生を低減し得る光源モジュール１０を備えた液晶表示装置１Ａを提供することができる。 Moreover, the liquid crystal display device 1A as the electronic apparatus of the present embodiment includes the light source module 10 of the present embodiment. Thereby, the liquid crystal display device 1 </ b> A including the light source module 10 that can reduce the occurrence of uneven brightness can be provided.
　　〔実施の形態２〕
　本発明の他の実施の形態について図９及び図１０に基づいて説明すれば、以下のとおりである。なお、本実施の形態において説明すること以外の構成は、前記実施の形態１と同じである。また、説明の便宜上、前記の実施の形態１の図面に示した部材と同一の機能を有する部材については、同一の符号を付し、その説明を省略する。 [Embodiment 2]
The following will describe another embodiment of the present invention with reference to FIGS. Configurations other than those described in the present embodiment are the same as those in the first embodiment. For convenience of explanation, members having the same functions as those shown in the drawings of the first embodiment are given the same reference numerals, and explanation thereof is omitted.
　前記実施の形態１の光源モジュール１０の導光板２０は、図５に示すように、複数の導光体２１が、長手方向に対して並列にそれぞれ隙間２２を有して設けられてなっていると共に、各導光体２１…は、長手方向に直交する断面がＴ字状断面を有する単体のＴ型導光体となっていた。しかし、本実施の形態では、各導光体は、図９に示すように、長手方向に直交する断面がＴ字状断面を有するＴ型導光体部３０を複数個連ねたキャタピラ型導光体４１からなっている点が異なっている。 As shown in FIG. 5, the light guide plate 20 of the light source module 10 according to the first embodiment includes a plurality of light guides 21 provided with gaps 22 in parallel with each other in the longitudinal direction. In addition, each light guide 21 is a single T-type light guide having a T-shaped cross section perpendicular to the longitudinal direction. However, in this embodiment, as shown in FIG. 9, each light guide has a caterpillar light guide in which a plurality of T-type light guide portions 30 each having a T-shaped cross section perpendicular to the longitudinal direction are connected. The point which consists of the body 41 is different.
　本実施の形態においても、各キャタピラ型導光体４１の間には、例えば１ｍｍの隙間２２が設けられていると共に、隣接するキャタピラ型導光体４１・４１の互いの側端部としてのＴ字薄肉部４１ｂ・４１ｂが、ＬＥＤ１２の光が入射されるＴ字厚肉部４１ｃ・４１ｃよりも薄くなっている。 Also in the present embodiment, a gap 22 of 1 mm, for example, is provided between the caterpillar light guides 41, and T as side ends of the adjacent caterpillar light guides 41 and 41 is provided. The thin- walled portions 41b and 41b are thinner than the T-shaped thick portions 41c and 41c into which the light from the LED 12 is incident.
　これにより、前記実施の形態１と同様に、キャタピラ型導光体４１・４１の間に隙間２２があっても、隙間２２での輝度ムラが発生し難いものとなっている。 As a result, as in the first embodiment, even if the gap 22 is between the caterpillar light guides 41 and 41, luminance unevenness in the gap 22 hardly occurs.
　尚、本実施の形態において、キャタピラ型導光体４１は、中間部においてもＴ字厚肉部４１ｃ・４１ｃよりも薄いＴ字薄肉部４１ｂ・４１ｂを設けていることにより、キャタピラ型となっている。このように、導光体の形状をキャタピラ型としたのは、導光体の厚さを一部において薄くすることにより軽量化を図るためである。また、導光体の長手方向に直交する側の長さを長くすることにより並べる導光体の本数を減らすことができるので、導光板２０の組み立て性を向上させるためでもある。上記キャタピラ型導光体４１の長手方向に直交する側の長さは例えば８４ｍｍである。また、Ｔ字厚肉部４１ｃの厚さは例えば５ｍｍであり、Ｔ字厚肉部４１ｃの長さは例えば９ｍｍであり、いずれも実施の形態１と同様である。さらに、Ｔ字薄肉部４１ｂの厚さは例えば２ｍｍであり、Ｔ字厚肉部４１ｃの長さは例えば１２ｍｍである。 In the present embodiment, the caterpillar light guide 41 is a caterpillar type by providing the T-shaped thin portions 41b and 41b thinner than the T-shaped thick portions 41c and 41c in the intermediate portion. Yes. Thus, the reason why the shape of the light guide is a caterpillar type is to reduce the weight by partially reducing the thickness of the light guide. Moreover, since the number of light guides to be arranged can be reduced by increasing the length on the side orthogonal to the longitudinal direction of the light guide, it is also for improving the assembly of the light guide plate 20. The length of the caterpillar light guide 41 on the side perpendicular to the longitudinal direction is, for example, 84 mm. Further, the thickness of the T-shaped thick part 41c is, for example, 5 mm, and the length of the T-shaped thick part 41c is, for example, 9 mm, both of which are the same as in the first embodiment. Furthermore, the thickness of the T-shaped thin portion 41b is 2 mm, for example, and the length of the T-shaped thick portion 41c is 12 mm, for example.
　次に、本実施の形態における光路変換部としての光散乱体２３の配置について、図１０（ａ）（ｂ）に基づいて説明する。図１０（ａ）はキャタピラ型導光体４１の出射側面に設けられた光散乱体２３の配設パターンを示す平面図であり、図１０（ｂ）はキャタピラ型導光体４１の断面図である。尚、ＬＥＤ１２は、キャタピラ型導光体４１におけるＴ字厚肉部４１ｃの側面側に設けられている。 Next, the arrangement of the light scatterers 23 as the optical path changing unit in the present embodiment will be described based on FIGS. 10 (a) and 10 (b). FIG. 10A is a plan view showing an arrangement pattern of the light scatterers 23 provided on the emission side surface of the caterpillar light guide 41, and FIG. 10B is a cross-sectional view of the caterpillar light guide 41. is there. The LED 12 is provided on the side surface side of the T-shaped thick portion 41 c in the caterpillar light guide 41.
　本実施の形態における光散乱体２３の配置は、図１０（ａ）に示すように、長手方向に平行に奥（図１０（ａ）における紙面の上側）に向かうに伴って光散乱体２３のパターンの間隔が短くなっていると共に、キャタピラ型導光体４１のＴ字薄肉部４１ｂ…がＴ字厚肉部４１ｃ…よりもピッチが短くなっている。すなわち、Ｔ字薄肉部４１ｂ…がＴ字厚肉部４１ｃ…よりも光散乱体２３の配設密度が高いことがわかる。これによって、キャタピラ型導光体４１において、輝度の均一化が図れるものとなっている。 As shown in FIG. 10A, the arrangement of the light scatterers 23 in the present embodiment is such that the light scatterers 23 are parallel to the longitudinal direction toward the back (upper side of the paper surface in FIG. 10A). The pattern interval is shortened, and the T-shaped thin portions 41b of the caterpillar light guide 41 are shorter in pitch than the T-shaped thick portions 41c. That is, it can be seen that the arrangement density of the light scatterers 23 is higher in the T-shaped thin portions 41b than in the T-shaped thick portions 41c. As a result, the caterpillar light guide 41 can achieve uniform luminance.
　このように、本実施の形態の光源モジュール１０では、導光体としてのキャタピラ型導光体４１は、長手方向に直交する断面がＴ字状断面を有するＴ型導光体部３０を複数個連ねたものからなっていると共に、各光源としてのＬＥＤ１２は、Ｔ型導光体部３０における厚肉部分であるＴ字厚肉部４１ｃ・４１ｃの端面から光をそれぞれ入射させる。 As described above, in the light source module 10 of the present embodiment, the caterpillar light guide 41 as the light guide has a plurality of T-type light guide portions 30 each having a T-shaped cross section perpendicular to the longitudinal direction. The LED 12 as each light source makes light incident from the end faces of the T-shaped thick portions 41 c and 41 c that are thick portions in the T-type light guide 30.
　これにより、導光板２０における導光体の数を減らすことができ、部品点数の増大を防止すると共に、中央部にも欠損部２１ｆを複数形成することになるので、導光板２０の重量を軽減することができる。したがって、導光板２０の軽量化を図り、かつコストの低減も図ることができる。すなわち、導光板２０は、例えば、アクリル樹脂からなっているが、この材料費の低減等を図ることができる。 As a result, the number of light guides in the light guide plate 20 can be reduced, the number of parts can be prevented, and a plurality of missing portions 21f can be formed in the central portion, thereby reducing the weight of the light guide plate 20. can do. Therefore, the light guide plate 20 can be reduced in weight and cost can be reduced. That is, although the light guide plate 20 is made of, for example, an acrylic resin, the material cost can be reduced.
　また、本実施の形態の光源モジュール１０では、光路変換部としての光散乱体２３は、Ｔ型導光体部３０における薄肉部分であるＴ字薄肉部４１ｂ…の出射側又は反射シート１１側での配設密度がＴ字厚肉部４１ｃ…の出射側又は反射シート１１側での配設密度よりも高密度となるように配設されている。 Moreover, in the light source module 10 of this Embodiment, the light-scattering body 23 as an optical path conversion part is the emission side of the T-shaped thin part 41b ... which is a thin part in the T-type light guide part 30, or the reflective sheet 11 side. Are arranged so as to be higher than the arrangement density on the emission side or the reflection sheet 11 side of the T-shaped thick portions 41c.
　すなわち、Ｔ型導光体部３０におけるＴ字薄肉部４１ｂ・４１ｂは、Ｔ字厚肉部４１ｃに比べてＬＥＤ１２からの光量が少ない。このため、光散乱体２３を、Ｔ型導光体部３０におけるＴ字薄肉部４１ｂ・４１ｂの出射側又は反射シート１１側での配設密度がＴ字厚肉部４１ｃの出射側又は反射シート１１側での配設密度よりも高密度となるように配設することによって、Ｔ型導光体部３０におけるＴ字薄肉部４１ｂ・４１ｂの出射側又は反射シート１１側からの出射光を増加させることができる。 That is, the T-shaped thin portions 41b and 41b in the T-shaped light guide body 30 have a smaller amount of light from the LED 12 than the T-shaped thick portion 41c. For this reason, the light scattering body 23 is arranged such that the arrangement density on the emission side of the T-shaped thin portions 41b and 41b or the reflection sheet 11 side in the T-shaped light guide portion 30 is the emission side or the reflection sheet of the T-shaped thick portion 41c. By arranging to be higher than the arrangement density on the 11 side, the emitted light from the emission side of the T-shaped thin portions 41 b and 41 b or the reflection sheet 11 side in the T-type light guide body 30 is increased. Can be made.
　また、本実施の形態の光源モジュール１０では、光散乱体２３は、キャタピラ型導光体４１の出射側又は反射シート１１側のうち欠損部２１ｆが存在しない面に設けられている。これにより、光散乱体２３を印刷によりパターン配置する場合に、キャタピラ型導光体４１の出射側又は反射シート１１側のうち、凹凸のない平滑な平面に印刷することができる。 Further, in the light source module 10 of the present embodiment, the light scatterer 23 is provided on the surface on the exit side or the reflection sheet 11 side of the caterpillar light guide 41 where the missing portion 21f does not exist. As a result, when the light scatterers 23 are arranged in a pattern by printing, printing can be performed on a smooth flat surface having no irregularities on the exit side of the caterpillar light guide 41 or the reflection sheet 11 side.
　また、本実施の形態の電子機器としての液晶表示装置１Ａは、本実施の形態の光源モジュール１０を備えている。これにより、輝度ムラの発生を低減し得る光源モジュール１０を備えた液晶表示装置１Ａを提供することができる。 Moreover, the liquid crystal display device 1A as the electronic apparatus of the present embodiment includes the light source module 10 of the present embodiment. Thereby, the liquid crystal display device 1 </ b> A including the light source module 10 that can reduce the occurrence of uneven brightness can be provided.
　　〔実施の形態３〕
　本発明のさらに他の実施の形態について図１１及び図１２に基づいて説明すれば、以下のとおりである。なお、本実施の形態において説明すること以外の構成は、前記実施の形態１及び実施の形態２と同じである。また、説明の便宜上、前記の実施の形態１及び実施の形態２の図面に示した部材と同一の機能を有する部材については、同一の符号を付し、その説明を省略する。 [Embodiment 3]
The following will describe still another embodiment of the present invention with reference to FIGS. The configurations other than those described in the present embodiment are the same as those in the first embodiment and the second embodiment. For convenience of explanation, members having the same functions as those shown in the drawings of Embodiment 1 and Embodiment 2 are given the same reference numerals, and explanation thereof is omitted.
　前記実施の形態の導光体２１及びキャタピラ型導光体４１では、Ｔ字厚肉部とＴ字薄肉部との隅角部が矩形に形成されていた。しかし、本実施の形態では、図１１に示すように、Ｔ字厚肉部とＴ字薄肉部との隅角部が面取りされている点が異なっている。 In the light guide 21 and the caterpillar light guide 41 of the above-described embodiment, the corners of the T-shaped thick portion and the T-shaped thin portion are formed in a rectangular shape. However, the present embodiment is different in that the corner portions of the T-shaped thick portion and the T-shaped thin portion are chamfered as shown in FIG.
　本実施の形態の特徴について、上記にて説明した導光体２１を用いて説明する。ただし、実施の形態２におけるキャタピラ型導光体４１についても原理は同じであり、キャタピラ型導光体４１についても本実施の形態の構成を適用することができる。 The characteristics of this embodiment will be described using the light guide 21 described above. However, the principle is the same for the caterpillar light guide 41 in the second embodiment, and the configuration of the present embodiment can be applied to the caterpillar light guide 41 as well.
　まず、図１１において破線にて示すように、導光体２１のＴ字厚肉部２１ｃとＴ字薄肉部２１ｂとの境界における隅角部に面取り５０が存在しない場合には、Ｔ字厚肉部２１ｃとＴ字薄肉部２１ｂとの隅角部が９０度になっているので、図１１において破線矢印にて示すように、ＬＥＤ１２から導光体２１に入射された光は、Ｔ字厚肉部２１ｃとＴ字薄肉部２１ｂとの隅角部にて全反射し、Ｔ字薄肉部２１ｂに導光されないか又は導光され難くなる。この結果、Ｔ字薄肉部２１ｂから出射される光が少なくなり、輝度の均一化が困難となる。 First, as shown by a broken line in FIG. 11, when the chamfer 50 does not exist at the corner portion at the boundary between the T-shaped thick portion 21 c and the T-shaped thin portion 21 b of the light guide 21, Since the corner portion of the portion 21c and the T-shaped thin portion 21b is 90 degrees, the light incident on the light guide 21 from the LED 12 is shown in FIG. The light is totally reflected at the corners of the portion 21c and the T-shaped thin portion 21b, and is not guided or hardly guided to the T-shaped thin portion 21b. As a result, the light emitted from the T-shaped thin portion 21b is reduced, and it is difficult to make the luminance uniform.
　これに対して、導光体２１のＴ字厚肉部２１ｃとＴ字薄肉部２１ｂとの隅角部に面取り５０が存在する場合には、図１１において実線矢印にて示すように、ＬＥＤ１２から導光体２１に入射された光はＴ字薄肉部２１ｂに導光されるので、Ｔ字薄肉部２１ｂに導光される光の減少を抑制することができる。その結果、Ｔ字薄肉部２１ｂから出射される光の減少を抑制することができ、輝度の均一化の低下を抑制することができる。 On the other hand, when chamfers 50 exist at the corners of the T-shaped thick portion 21c and the T-shaped thin portion 21b of the light guide 21, as indicated by solid line arrows in FIG. Since the light incident on the light guide 21 is guided to the T-shaped thin portion 21b, a decrease in light guided to the T-shaped thin portion 21b can be suppressed. As a result, a decrease in light emitted from the T-shaped thin portion 21b can be suppressed, and a decrease in luminance uniformity can be suppressed.
　尚、このＴ字厚肉部２１ｃとＴ字薄肉部２１ｂとの境界における隅角部における面取り５０は、図１１に示すように、湾曲状面取り５１とすることができる。すなわち、湾曲状面取り５１は、円形又は楕円形等の曲線の断面となっているものである。これにより、Ｔ字厚肉部２１ｃとＴ字薄肉部２１ｂとの隅角部における変曲点をなくすことができるので、輝度の均一化において、変曲点ができるのを防止することができる。 Note that the chamfer 50 at the corner portion at the boundary between the T-shaped thick portion 21c and the T-shaped thin portion 21b can be a curved chamfer 51 as shown in FIG. That is, the curved chamfer 51 has a curved cross section such as a circle or an ellipse. Thereby, since the inflection point in the corner part of the T-shaped thick part 21c and the T-shaped thin part 21b can be eliminated, it is possible to prevent the inflection point from being formed in the uniform luminance.
　この考え方からすると、Ｔ字厚肉部２１ｃとＴ字薄肉部２１ｂとの隅角部における面取り５０は、必ずしも湾曲状面取り５１にする必要はなく、図１２（ａ）に示すように、例えば、Ｔ字厚肉部２１ｃの途中からＴ字薄肉部２１ｂに向けて直線的に延びる直線状面取り５２とすることも可能である。これによって、変曲点はできるが、ＬＥＤ１２から導光体２１に入射された光は、Ｔ字薄肉部２１ｂに導光されるので、Ｔ字薄肉部２１ｂに導光される光の減少を抑制することができる。その結果、Ｔ字薄肉部２１ｂから出射される光の減少を抑制することができ、輝度の均一化の低下を抑制することができる。 From this point of view, the chamfer 50 at the corner portion of the T-shaped thick portion 21c and the T-shaped thin portion 21b does not necessarily need to be a curved chamfer 51. For example, as shown in FIG. A straight chamfer 52 that extends linearly from the middle of the T-shaped thick portion 21c toward the T-shaped thin portion 21b can also be used. In this way, an inflection point can be made, but the light incident on the light guide 21 from the LED 12 is guided to the T-shaped thin portion 21b, so that a decrease in the light guided to the T-shaped thin portion 21b is suppressed. can do. As a result, a decrease in light emitted from the T-shaped thin portion 21b can be suppressed, and a decrease in luminance uniformity can be suppressed.
　また、面取り５０を直線状にする場合においては、例えば、図１２（ｂ）に示すように、Ｔ字厚肉部２１ｃの最初から直線状に面取りする直線状面取り５３とすることも可能である。これにより、変曲点は無くなり、かつＴ字薄肉部２１ｂに光りを導光させることができる。 Further, when the chamfer 50 is linear, for example, as shown in FIG. 12B, a linear chamfer 53 that linearly chamfers from the beginning of the T-shaped thick portion 21c can be used. . Thereby, there is no inflection point, and light can be guided to the T-shaped thin portion 21b.
　このように、本実施の形態では、光源モジュール１０では、導光体２１におけるＴ字厚肉部２１ｃと該Ｔ字厚肉部２１ｃよりも薄く形成されたＴ字薄肉部２１ｂ・２１ｂとの境界における隅角部には、湾曲状面取り５１、直線状面取り５２・５３等の面取り５０が施されている。 As described above, in the present embodiment, in the light source module 10, the boundary between the T-shaped thick portion 21c of the light guide 21 and the T-shaped thin portions 21b and 21b formed thinner than the T-shaped thick portion 21c. Chamfers 50 such as a curved chamfer 51 and straight chamfers 52 and 53 are provided at the corners of the.
　これにより、導光体２１における中央部としてのＴ字厚肉部２１ｃを導光する光が、側端部としてのＴ字薄肉部２１ｂ・２１ｂとの境界における隅角部にて反射されることによってＴ字薄肉部２１ｂ・２１ｂに導光されないことを防止することができる。したがって、Ｔ字薄肉部２１ｂ・２１ｂでの輝度の低下を抑制することができる。 Thereby, the light which guides the T-shaped thick part 21c as a center part in the light guide 21 is reflected in the corner part in the boundary with T-shaped thin part 21b * 21b as a side edge part. Therefore, it is possible to prevent the light from being guided to the T-shaped thin portions 21b and 21b. Accordingly, it is possible to suppress a decrease in luminance at the T-shaped thin portions 21b and 21b.
　また、本実施の形態の光源モジュール１０では、キャタピラ型導光体４１の複数のＴ型導光体部３０における薄肉部分であるＴ字薄肉部４１ｂ・４１ｂと該Ｔ型導光体部３０におけるＴ字厚肉部４１ｃとの境界における各隅角部には、面取り５０が施されているとすることができる。 Further, in the light source module 10 of the present embodiment, the T-shaped thin portions 41 b and 41 b that are thin portions in the plurality of T-type light guide portions 30 of the caterpillar type light guide 41 and the T-type light guide portion 30. It can be assumed that chamfering 50 is applied to each corner portion at the boundary with the T-shaped thick portion 41c.
　これにより、複数のＴ型導光体部３０…を有するキャタピラ型導光体４１において、Ｔ型導光体部３０におけるＴ字厚肉部４１ｃを導光する光が、Ｔ型導光体部３０におけるＴ字薄肉部４１ｂ・４１ｂとの境界における隅角部にて反射されることによってＴ字薄肉部４１ｂ・４１ｂに導光されないことを防止することができる。したがって、Ｔ字薄肉部４１ｂ・４１ｂでの輝度の低下を抑制することができる。 As a result, in the caterpillar light guide 41 having a plurality of T-type light guide portions 30..., The light that guides the T-shaped thick portion 41 c in the T-type light guide portion 30 is converted into the T-type light guide portion. It is possible to prevent light from being guided to the T-shaped thin portions 41b and 41b by being reflected at the corners at the boundaries between the T-shaped thin portions 41b and 41b. Accordingly, it is possible to suppress a decrease in luminance at the T-shaped thin portions 41b and 41b.
　また、本実施の形態の電子機器としての液晶表示装置１Ａは、本実施の形態の光源モジュール１０を備えている。これにより、輝度ムラの発生を低減し得る光源モジュール１０を備えた液晶表示装置１Ａを提供することができる。 Moreover, the liquid crystal display device 1A as the electronic apparatus of the present embodiment includes the light source module 10 of the present embodiment. Thereby, the liquid crystal display device 1 </ b> A including the light source module 10 that can reduce the occurrence of uneven brightness can be provided.
　　〔実施の形態４〕
　本発明のさらに他の実施の形態について図１３～図１６に基づいて説明すれば、以下のとおりである。なお、本実施の形態において説明すること以外の構成は、前記実施の形態１～実施の形態３と同じである。また、説明の便宜上、前記の実施の形態１～実施の形態３の図面に示した部材と同一の機能を有する部材については、同一の符号を付し、その説明を省略する。 [Embodiment 4]
The following will describe still another embodiment of the present invention with reference to FIGS. Configurations other than those described in the present embodiment are the same as those in the first to third embodiments. For convenience of explanation, members having the same functions as those shown in the drawings of Embodiments 1 to 3 are given the same reference numerals, and descriptions thereof are omitted.
　前記実施の形態１及び実施の形態２の導光体２１及びキャタピラ型導光体４１では、図１３（ｂ）に示すように、Ｔ字厚肉部２１ｃ（又はＴ字厚肉部４１ｃ）は矩形に形成されていた。しかし、本実施の形態では、図１３（ａ）に示すように、導光体２１(又はキャタピラ型導光体４１)のＴ字厚肉部２１ｃ（又はＴ字厚肉部４１ｃ）は、先端矩形に面取りが施された湾曲状面取りとしての先端角湾曲面取り部６０を有している点が異なっている。 In the light guide 21 and the caterpillar light guide 41 of the first and second embodiments, as shown in FIG. 13B, the T-shaped thick part 21c (or the T-shaped thick part 41c) is It was formed in a rectangle. However, in the present embodiment, as shown in FIG. 13A, the T-shaped thick portion 21c (or T-shaped thick portion 41c) of the light guide 21 (or the caterpillar light guide 41) The difference is that it has a tip angle curved chamfer 60 as a curved chamfer in which a rectangle is chamfered.
　すなわち、Ｔ字厚肉部２１ｃが矩形に形成されている場合には、図１４（ｂ）の紙面右側における破線円にて示すように、面取りをしていないＴ字厚肉部２１ｃのエッジ付近にて変曲点が確認でき、図１４（ａ）の紙面下側に示すように、暗線が発生しているのがわかる。 That is, in the case where the T-shaped thick portion 21c is formed in a rectangular shape, as shown by the broken-line circle on the right side of FIG. 14B, the vicinity of the edge of the T-shaped thick portion 21c that is not chamfered. The inflection point can be confirmed at, and it can be seen that a dark line is generated as shown on the lower side of the drawing in FIG.
　これに対して、導光体２１(又はキャタピラ型導光体４１)のＴ字厚肉部２１ｃ（又はＴ字厚肉部４１ｃ）における先端矩形に先端角湾曲面取り部６０を有している場合には、図１４（ｂ）の紙面左側に示すように、先端角湾曲面取り部６０付近には変曲点がなく、図１４（ａ）の紙面上側に示すように、暗線の発生も存在しないことがわかる。 On the other hand, when the distal end angle curved chamfered portion 60 is provided in the distal end rectangle of the T-shaped thick portion 21c (or T-shaped thick portion 41c) of the light guide 21 (or caterpillar light guide 41). 14B, there is no inflection point in the vicinity of the tip angle curved chamfered portion 60 as shown on the left side of FIG. 14B, and no dark line is generated as shown on the upper side of FIG. 14A. I understand that.
　ここで、矩形断面における輝度ムラの発生を防止できる理由を、図１５（ａ）（ｂ）（ｃ）（ｄ）に基づいて説明する。 Here, the reason why the occurrence of luminance unevenness in the rectangular cross section can be prevented will be described with reference to FIGS. 15 (a) (b) (c) (d).
　すなわち、図１５（ａ）に示すように、導光体２１のＴ字厚肉部２１ｃにおける下面中央部から光線を出射した場合の取り出し光の動きを検討する。 That is, as shown in FIG. 15 (a), the movement of extracted light when a light beam is emitted from the center of the lower surface of the T-shaped thick portion 21c of the light guide 21 is examined.
　最初に、Ｔ字厚肉部２１ｃが矩形に形成されている場合には、図１５（ｂ）に示すように、Ｔ字厚肉部２１ｃの側面に当たる光線の一部が全反射し、エッジ部分から光線が取り出せないことがわかる。この結果、Ｔ字厚肉部２１ｃの矩形のエッジ部分が暗線になることが明らかである。 First, when the T-shaped thick portion 21c is formed in a rectangular shape, as shown in FIG. 15B, a part of the light beam that hits the side surface of the T-shaped thick portion 21c is totally reflected, and the edge portion It can be seen that no light beam can be extracted. As a result, it is clear that the rectangular edge portion of the T-shaped thick portion 21c becomes a dark line.
　これに対して、導光体２１(又はキャタピラ型導光体４１)のＴ字厚肉部２１ｃ（又はＴ字厚肉部４１ｃ）における先端矩形に先端角湾曲面取り部６０を有している場合には、図１５（ｃ）（ｄ）に示すように、導光体２１(又はキャタピラ型導光体４１)のＴ字厚肉部２１ｃ（又はＴ字厚肉部４１ｃ）における下面中央部から出射される光線のうち、全反射する光線がないか又は少ない。この結果、受光面での照度分布に急峻な変化が生じ難い。 On the other hand, when the distal end angle curved chamfered portion 60 is provided in the distal end rectangle of the T-shaped thick portion 21c (or T-shaped thick portion 41c) of the light guide 21 (or caterpillar light guide 41). As shown in FIGS. 15C and 15D, from the center of the lower surface of the T-shaped thick part 21c (or T-shaped thick part 41c) of the light guide 21 (or caterpillar light guide 41). Of the emitted light, there are no or few totally reflected light rays. As a result, an abrupt change is unlikely to occur in the illuminance distribution on the light receiving surface.
　したがって、矩形のＴ字厚肉部２１ｃ（又はＴ字厚肉部４１ｃ）のエッジに起因する輝度ムラの改善を図れることが把握できる。 Therefore, it can be understood that the luminance unevenness caused by the edge of the rectangular T-shaped thick portion 21c (or T-shaped thick portion 41c) can be improved.
　尚、この原理から波及して、Ｔ字厚肉部２１ｃにおける先端矩形に先端角湾曲面取り部６０は、湾曲のうちでも円形の面取りとすることにより、輝度の均一性を向上させることが把握される。 Note that it is understood from this principle that the tip angle curved chamfered portion 60 in the tip rectangular shape in the T-shaped thick portion 21c improves the luminance uniformity by making it a circular chamfer even among the curves. The
　このように、本実施の形態の光源モジュール１０では、導光体２１における中央部としてのＴ字厚肉部２１ｃの先端角部には、先端角湾曲面取り部６０が施されている。これにより、導光体２１における中央部としてのＴ字厚肉部２１ｃにて導光された光が導光体２１から出射するときに、Ｔ字厚肉部２１ｃの先端角部から出射されないことによって輝度ムラが発生することを防止することができる。すなわち、Ｔ字厚肉部２１ｃの先端角部に先端角湾曲面取り部６０を施すことによって、先端角湾曲面取り部６０から光が出射されるので、輝度ムラの発生を防止することができる。 Thus, in the light source module 10 of the present embodiment, the tip angle curved chamfered portion 60 is applied to the tip corner portion of the T-shaped thick portion 21c as the central portion in the light guide 21. Thereby, when the light guided by the T-shaped thick portion 21c as the central portion of the light guide 21 is emitted from the light guide 21, it is not emitted from the tip corner portion of the T-shaped thick portion 21c. Therefore, it is possible to prevent uneven brightness from occurring. That is, by applying the tip angle curved chamfered portion 60 to the tip corner portion of the T-shaped thick portion 21c, light is emitted from the tip angle curved chamfered portion 60, so that occurrence of luminance unevenness can be prevented.
　また、本実施の形態の光源モジュール１０では、キャタピラ型導光体４１の複数のＴ型導光体部３０…におけるＴ字厚肉部４１ｃ…の先端角部には、湾曲状面取りとしての先端角湾曲面取り部６０が施されている。これにより、複数のＴ型導光体部３０…を有するキャタピラ型導光体４１において、キャタピラ型導光体４１におけるＴ字厚肉部４１ｃ…にて導光された光がキャタピラ型導光体４１から出射するときに、Ｔ字厚肉部４１ｃ…の先端角部から出射されないことによって輝度ムラが発生することを防止することができる。 Further, in the light source module 10 of the present embodiment, the tip as a curved chamfer is provided at the tip corner of the T-shaped thick portion 41c of the plurality of T-shaped light guides 30 of the caterpillar light guide 41. An angular curved chamfer 60 is provided. As a result, in the caterpillar light guide 41 having a plurality of T-shaped light guide parts 30..., The light guided by the T-shaped thick parts 41 c of the caterpillar light guide 41 is a caterpillar light guide. When the light is emitted from 41, it is possible to prevent the occurrence of uneven brightness by not being emitted from the tip corners of the T-shaped thick portions 41c.
　すなわち、Ｔ字厚肉部４１ｃ…の先端角部に先端角湾曲面取り部６０を施すことによって、先端角湾曲面取り部６０から光が出射されるので、輝度ムラの発生を防止することができる。 That is, by applying the tip angle curved chamfered portion 60 to the tip corner portion of the T-shaped thick portion 41c..., Light is emitted from the tip angle curved chamfered portion 60, thereby preventing occurrence of luminance unevenness.
　尚、本実施の形態においては、Ｔ字厚肉部２１ｃにおける先端矩形に先端角湾曲面取り部６０を設けることのみについて説明したが、本発明では、必ずしもこれに限定されず、例えば、実施の形態３の構成と合わせた導光体２１とすることが可能である。 In the present embodiment, only the provision of the tip angle curved chamfered portion 60 in the tip rectangle of the T-shaped thick portion 21c has been described. However, the present invention is not necessarily limited to this, for example, the embodiment. The light guide 21 combined with the configuration 3 can be obtained.
　例えば、図１６に示すように、実施の形態２に示すキャタピラ型導光体４１において、Ｔ字厚肉部４１ｃにおける先端矩形に先端角湾曲面取り部６０を設けると共に、Ｔ字厚肉部４１ｃとＴ字薄肉部４１ｂとの隅角部に面取り５０を設けることが可能である。 For example, as shown in FIG. 16, in the caterpillar light guide 41 shown in the second embodiment, a tip angle curved chamfered portion 60 is provided in the tip rectangle of the T-shaped thick portion 41c, and the T-shaped thick portion 41c It is possible to provide a chamfer 50 at a corner with the T-shaped thin portion 41b.
　これにより、Ｔ字薄肉部４１ｂへの導光量を多くすると共に、先端矩形のエッジでの輝度ムラを防止することができる。 Thereby, the amount of light guided to the T-shaped thin portion 41b can be increased, and luminance unevenness at the edge of the front end rectangle can be prevented.
　また、本実施の形態の電子機器としての液晶表示装置１Ａは、本実施の形態の光源モジュール１０を備えている。これにより、輝度ムラの発生を低減し得る光源モジュール１０を備えた液晶表示装置１Ａを提供することができる。 Moreover, the liquid crystal display device 1A as the electronic apparatus of the present embodiment includes the light source module 10 of the present embodiment. Thereby, the liquid crystal display device 1 </ b> A including the light source module 10 that can reduce the occurrence of uneven brightness can be provided.
　　〔実施の形態５〕
　本発明のさらに他の実施の形態について図１７及び図１８に基づいて説明すれば、以下のとおりである。なお、本実施の形態において説明すること以外の構成は、前記実施の形態１～実施の形態４と同じである。また、説明の便宜上、前記の実施の形態１～実施の形態４の図面に示した部材と同一の機能を有する部材については、同一の符号を付し、その説明を省略する。 [Embodiment 5]
The following will describe still another embodiment of the present invention with reference to FIGS. Configurations other than those described in the present embodiment are the same as those in the first to fourth embodiments. For convenience of explanation, members having the same functions as those shown in the drawings of Embodiments 1 to 4 are given the same reference numerals, and descriptions thereof are omitted.
　前記実施の形態１～実施の形態４の導光体２１及びキャタピラ型導光体４１では、導光体の両側に欠損部２１ｆが設けられていた。しかし、本実施の形態では、図１７に示すように、導光体７１の片側にのみ欠損部２１ｆが設けられている点が異なっている。 In the light guide 21 and the caterpillar light guide 41 according to the first to fourth embodiments, the defect portions 21f are provided on both sides of the light guide. However, the present embodiment is different in that the defect portion 21f is provided only on one side of the light guide 71 as shown in FIG.
　本実施の形態の導光体７１のように、片側にのみ欠損部２１ｆが設けられた状態でも実施の形態１で説明した効果が得られる。 The effect described in the first embodiment can be obtained even in the state where the defect portion 21f is provided only on one side like the light guide 71 of the present embodiment.
　また、図１８に示すように、片側のみ欠損部２１ｆがある導光体を複数個連ねたキャタピラ構造になっていても、実施の形態２と同様の効果が得られる。 Further, as shown in FIG. 18, the same effect as in the second embodiment can be obtained even when the caterpillar structure is formed by connecting a plurality of light guides each having the missing portion 21f only on one side.
　　〔実施の形態６〕
　本発明のさらに他の実施の形態について図１９～図２２に基づいて説明すれば、以下のとおりである。なお、本実施の形態において説明すること以外の構成は、前記実施の形態１～実施の形態５と同じである。また、説明の便宜上、前記の実施の形態１～実施の形態５の図面に示した部材と同一の機能を有する部材については、同一の符号を付し、その説明を省略する。 [Embodiment 6]
The following will describe still another embodiment of the present invention with reference to FIGS. Configurations other than those described in the present embodiment are the same as those in the first to fifth embodiments. For convenience of explanation, members having the same functions as those shown in the drawings of Embodiments 1 to 5 are given the same reference numerals, and descriptions thereof are omitted.
　本実施の形態の光源モジュール１０を備えた電子機器としての例えば液晶表示装置１Ｂは、図１９に示すように、下から順に、シャーシ２、光源モジュール１０、液晶パネル３、ベゼル４にて構成されており、光源モジュール１０は、反射板としての反射シート１１、光源としてのＬＥＤ（Light Emitting Diode：発光ダイオード）１２及びＬＥＤ基板１３、リフレクタ１４、導光板２０、拡散板１５、並びに光学シート群１６から構成されている。尚、拡散板１５及び光学シート群１６は、本発明においては存在しなくてもよい。 For example, a liquid crystal display device 1B as an electronic apparatus including the light source module 10 according to the present embodiment includes a chassis 2, a light source module 10, a liquid crystal panel 3, and a bezel 4 in order from the bottom as shown in FIG. The light source module 10 includes a reflection sheet 11 as a reflection plate, an LED (Light-Emitting Diode) 12 and LED substrate 13 as a light source, a reflector 14, a light guide plate 20, a diffusion plate 15, and an optical sheet group 16. It is composed of Note that the diffusion plate 15 and the optical sheet group 16 may not exist in the present invention.
　上記ＬＥＤ１２及びＬＥＤ基板１３、並びにリフレクタ１４は、図２０に示すように、導光板２０の端部に設けられ、これによって、ＬＥＤ１２からの光を導光板２０における一方の端面２１ａに入射し、導光板２０の出射面２１ｄから拡散板１５及び光学シート群１６を通して、液晶パネル３に光を照射するようになっている。したがって、本実施の形態の光源モジュール１０は、サイドエッジ（サイドライトともいう）方式を採用している。尚、拡散板１５は、導光体２１の出射面２１ｄ上に間隔を設けずに密着して配置されている。 As shown in FIG. 20, the LED 12, the LED substrate 13, and the reflector 14 are provided at the end portion of the light guide plate 20, so that light from the LED 12 is incident on one end surface 21 a of the light guide plate 20 and guided. The liquid crystal panel 3 is irradiated with light from the exit surface 21 d of the light plate 20 through the diffusion plate 15 and the optical sheet group 16. Therefore, the light source module 10 of the present embodiment employs a side edge (also referred to as side light) method. Note that the diffusion plate 15 is disposed in close contact with the light exit surface 21d of the light guide 21 without providing a gap.
　本実施の形態の光源モジュール１０は、このバックライトブリンキングを行うために、前記実施の形態１における図４に示すように、導光板２０を複数の導光体２１…にて分割して構成し、これら複数の導光体２１…を、長手方向に対して並列にそれぞれ隙間２２を有して配設している。したがって、本実施の形態では、図２０に示すように、ＬＥＤ１２は、各導光体２１における長手方向の一方の端面２１ａにおける前記図１に示すＴ字厚肉部２１ｃから光をそれぞれ入射させるようになっている。尚、必ずしも一方の端面２１ａに限らず、長手方向の他方の端面から入射させてもよく、さらに、一方の端面２１ａ及び他方の端面の両方から光を入射させてもよい。すなわち、本発明では、少なくとも一方の端面２１ａから光を入射させれば足りる。 In order to perform this backlight blinking, the light source module 10 of the present embodiment is configured by dividing the light guide plate 20 by a plurality of light guides 21 as shown in FIG. 4 in the first embodiment. These light guides 21 are arranged with a gap 22 in parallel with each other in the longitudinal direction. Therefore, in the present embodiment, as shown in FIG. 20, the LED 12 causes light to enter from the T-shaped thick portion 21 c shown in FIG. 1 on one end face 21 a in the longitudinal direction of each light guide 21. It has become. In addition, it is not necessarily limited to one end surface 21a, but may be incident from the other end surface in the longitudinal direction, and light may be incident from both one end surface 21a and the other end surface. That is, in the present invention, it is sufficient that light is incident from at least one end face 21a.
　尚、導光板２０を複数の導光体２１…に分割して長手方向に対して並列に配列する場合に、導光体２１の熱膨張及び製造公差を考慮すると、隙間２２として１～２ｍｍ程度が必要である。 When the light guide plate 20 is divided into a plurality of light guides 21 and arranged in parallel in the longitudinal direction, the clearance 22 is about 1 to 2 mm in consideration of thermal expansion and manufacturing tolerances. is required.
　次に、図２１に基づいて、光源モジュール１０における導光体２１の取り付け構造を説明する。 Next, the mounting structure of the light guide 21 in the light source module 10 will be described with reference to FIG.
　図２１に示すように、導光板２０の各導光体２１は、それぞれ、中央におけるＴ字厚肉部２１ｃの両側に固定部２１ｂ・２１ｂを設けた断面Ｔ字状となっている。 As shown in FIG. 21, each light guide 21 of the light guide plate 20 has a T-shaped cross section in which fixing portions 21b and 21b are provided on both sides of a T-shaped thick portion 21c at the center.
　すなわち、固定部２１ｂ・２１ｂは、シャーシ２側の面がＴ字厚肉部２１ｃのシャーシ２側の面と同一面となるように形成されている。そして、固定部２１ｂ・２１ｂをシャーシ２と一緒に、固定具８０の上側押え８１と下側押え８２との間に挟むことによって導光板２０をシャーシ２に固定する。 That is, the fixed portions 21b and 21b are formed such that the surface on the chassis 2 side is flush with the surface on the chassis 2 side of the T-shaped thick portion 21c. The light guide plate 20 is fixed to the chassis 2 by sandwiching the fixing portions 21b and 21b together with the chassis 2 between the upper presser 81 and the lower presser 82 of the fixture 80.
　これにより、複数の導光体２１…をシャーシ２に対して安定して固定することが可能となる。したがって、従来のように、位置ずれによる輝度ムラの発生や、液晶パネル等の接触しての破損等を防止することができる。 This makes it possible to stably fix the plurality of light guides 21 to the chassis 2. Therefore, as in the prior art, it is possible to prevent the occurrence of luminance unevenness due to misalignment and the damage caused by contact of the liquid crystal panel or the like.
　さらに、導光体２１の詳細な形状は、次の通りである。 Furthermore, the detailed shape of the light guide 21 is as follows.
　隣り合う導光体２１・２１の互いに対向する側端部としての固定部２１ｂ・２１ｂは、それぞれ、導光体２１における長手方向に直交する断面の中央部としてのＴ字厚肉部２１ｃよりも薄く形成されている。この結果、本実施の形態の導光体２１は、側端部において、拡散板１５側に欠損部２１ｆ・２１ｆを有して断面Ｔ状となっており、厚く形成されたＴ字厚肉部２１ｃと薄く形成された固定部２１ｂ・２１ｂとからなっている。 The fixing portions 21b and 21b as the side ends facing each other of the adjacent light guides 21 and 21 are more than the T-shaped thick portion 21c as the central portion of the cross section perpendicular to the longitudinal direction of the light guide 21. Thinly formed. As a result, the light guide body 21 of the present embodiment has a T-shaped thick section formed with a T-shaped section at the side end portion with the missing portions 21f and 21f on the diffusion plate 15 side. 21c and thinly formed fixing portions 21b and 21b.
　尚、固定具８０の構造は、図２１のものに限定されず、固定部２１ｂ・２１ｂをシャーシ２に直接又は間接に取り付けるものであれば任意に選択できる。 Note that the structure of the fixture 80 is not limited to that shown in FIG. 21, and can be arbitrarily selected as long as the fixing portions 21 b and 21 b are attached directly or indirectly to the chassis 2.
　また、固定部２１ｂ・２１ｂは、該固定部２１ｂ・２１ｂのシャーシ２側の面がＴ字厚肉部２１ｃのシャーシ２側の面と同一面となるように形成されていることによって、導光体２１とシャーシ２との接触面が広くなって好ましい。ただし、これに限定するものではない。すなわち、導光体２１をシャーシ２に固定できれば、固定部２１ｂ・２１ｂの位置は任意であり、例えば出射面２１ｄ寄りに位置していてもよい。
〔印刷パターン〕
　上記固定部２１ｂ・２１ｂを有する導光体２１に形成される光散乱体２３のパターン例について、図２２（ａ）（ｂ）に基づいて説明する。図２２（ａ）（ｂ）は、印刷パターンＡによって光散乱体２３が形成された導光体２１を示す図である。 The fixed portions 21b and 21b are formed so that the surface of the fixed portions 21b and 21b on the chassis 2 side is flush with the surface of the T-shaped thick portion 21c on the chassis 2 side. It is preferable that the contact surface between the body 21 and the chassis 2 is wide. However, the present invention is not limited to this. That is, as long as the light guide 21 can be fixed to the chassis 2, the positions of the fixing portions 21b and 21b are arbitrary, and may be positioned closer to the emission surface 21d, for example.
[Print pattern]
A pattern example of the light scatterer 23 formed on the light guide 21 having the fixing portions 21b and 21b will be described with reference to FIGS. 22A and 22B are views showing the light guide 21 in which the light scatterer 23 is formed by the printing pattern A. FIG.
　図２２（ａ）（ｂ）に示すように、導光体２１には、Ｔ字厚肉部２１ｃ及び固定部２１ｂ・２１ｂのシャーシ２側の面（対向面２１ｅ）に印刷パターンＡの形状で光散乱体２３が形成されている。 As shown in FIGS. 22A and 22B, the light guide 21 has a T-shaped thick portion 21c and a surface of the fixing portion 21b / 21b on the chassis 2 side (opposing surface 21e) in the form of a printing pattern A. A light scatterer 23 is formed.
　導光体２１は、例えば、長手方向の長さが１３６１．０ｍｍ（画面サイズによっては、９００～１６００ｍｍであってもよい。）、短手方向の長さが９３～９９ｍｍ（４０～１００ｍｍであってもよく、１００ｍｍ以上となることもある。）、中央部であるＴ字厚肉部２１ｃの厚さが４ｍｍ、側端部である固定部２１ｂ・２１ｂの厚さが１ｍｍ、固定部２１ｂ・２１ｂの長さが２ｍｍとなっている。さらに、印刷パターンＡによって光散乱体２３が形成された導光体２１では、Ｔ字厚肉部２１ｃの前記出射面２１ｄ（対向面２１ｅとは反対側）に長手方向に沿って、図示しない溝が形成されている。この溝は、ピッチが１ｍｍ（０．６ｍｍ以上、例えば、１ｍｍであってもよい。）、深さが０．２３ｍｍ（ピッチにより変るが、０．１８ｍｍ以上、例えば、０．３ｍｍであってもよい）である。また、図示されているＴ字厚肉部２１ｃと固定部２１ｂ・２１ｂとの間は垂直面となっているが、傾斜部を有していてもよい。 For example, the light guide 21 has a length in the longitudinal direction of 1361.0 mm (may be 900 to 1600 mm depending on the screen size), and a length in the short direction of 93 to 99 mm (40 to 100 mm). The thickness of the T-shaped thick portion 21c as the central portion is 4 mm, the thickness of the fixing portions 21b and 21b as the side ends is 1 mm, and the fixing portion 21b The length of 21b is 2 mm. Further, in the light guide 21 in which the light scatterer 23 is formed by the printing pattern A, a groove (not shown) is provided along the longitudinal direction on the emission surface 21d (opposite the facing surface 21e) of the T-shaped thick portion 21c. Is formed. The groove has a pitch of 1 mm (0.6 mm or more, for example, 1 mm) and a depth of 0.23 mm (varies depending on the pitch, but may be 0.18 mm or more, for example, 0.3 mm). Good). Moreover, although the T-shaped thick part 21c and the fixing | fixed part 21b * 21b shown in figure are vertical surfaces, you may have an inclination part.
　印刷パターンＡは、導光体２１のパターン配置面である対向面２１ｅに例えば円形状としての水玉模様状に形成されており、Ｔ字厚肉部２１ｃの中心を対称軸として、左右対称となっている。図２２（ａ）（ｂ）から分かるように、印刷パターンＡは、Ｔ字厚肉部２１ｃに対応するパターン配置面の領域では、ドット径が大きく、略一様である。また、Ｔ字厚肉部２１ｃと固定部２１ｂ・２１ｂとの境界付近では、パターンサイズやパターン間隔等がＴ字厚肉部２１ｃと異なっている。この理由は、輝度均一性の高い面状光源を構成するためである。ただし、特にこのパターンに限るものではない。 The printed pattern A is formed, for example, in a polka dot pattern as a circular shape on the opposing surface 21e, which is the pattern arrangement surface of the light guide 21, and is symmetric with respect to the center of the T-shaped thick portion 21c. ing. As can be seen from FIGS. 22A and 22B, the print pattern A has a large dot diameter and is substantially uniform in the area of the pattern arrangement surface corresponding to the T-shaped thick portion 21c. Further, in the vicinity of the boundary between the T-shaped thick portion 21c and the fixed portions 21b and 21b, the pattern size, the pattern interval, and the like are different from the T-shaped thick portion 21c. The reason for this is to construct a planar light source with high luminance uniformity. However, it is not limited to this pattern.
　本実施の形態では、１個のドット径は、例えば１００μｍ～１０００μｍ（１００μｍ～２０００μｍであってもよい。）である。 In the present embodiment, the dot diameter is, for example, 100 μm to 1000 μm (may be 100 μm to 2000 μm).
　尚、本発明は、上述した各実施形態に限定されるものではなく、請求項に示した範囲で種々の変更が可能であり、異なる実施形態にそれぞれ開示された技術的手段を適宜組み合わせて得られる実施形態についても本発明の技術的範囲に含まれる。 The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the technical means disclosed in different embodiments can be appropriately combined. Such embodiments are also included in the technical scope of the present invention.
　以上のように、本発明の光源モジュールでは、前記導光体の少なくとも一方の側端部は、該導光体の反射シート側に欠損部が設けられていることにより薄く形成されているとすることが可能である。 As described above, in the light source module of the present invention, it is assumed that at least one side end portion of the light guide is thinly formed by providing the defective portion on the reflection sheet side of the light guide. It is possible.
　これにより、導光体の少なくとも一方の側端部では、導光体から出射した光の反射シートでの反射光が導光体の欠損部を通過することによって、導光体に再入射することなく、導光体間の隙間を照らすことになる。 Thereby, in at least one side end portion of the light guide, the light reflected from the reflection sheet of the light emitted from the light guide passes through the defect portion of the light guide and reenters the light guide. Without illuminating the gaps between the light guides.
　また、本発明の光源モジュールでは、前記導光体の少なくとも一方の側端部は、該導光体の出射側に欠損部が設けられていることにより薄く形成されているとすることが可能である。 In the light source module of the present invention, at least one side end portion of the light guide can be formed thin by providing a defect portion on the light exit side of the light guide. is there.
　これにより、導光体の少なくとも一方の側端部では、導光体から出射した光が導光体の欠損部を通過することによって、導光体に再入射することなく、導光体間の隙間を照らすことができる。 Thereby, in the at least one side edge part of a light guide, the light radiate | emitted from the light guide passes through the defect | deletion part of a light guide, and does not re-enter a light guide, but between light guides Can illuminate the gap.
　また、本発明の光源モジュールでは、前記導光体は、長手方向に直交する断面がＴ字状断面を有するＴ型導光体部を複数個連ねたものからなっていると共に、前記各光源は、上記Ｔ型導光体部における厚肉部分であるＴ字厚肉部の端面から光をそれぞれ入射させるとすることが可能である。 Moreover, in the light source module of the present invention, the light guide has a structure in which a plurality of T-shaped light guide portions each having a T-shaped cross section orthogonal to the longitudinal direction are connected. The light can be incident from the end face of the T-shaped thick portion which is the thick portion of the T-shaped light guide.
　これにより、導光板における導光体の数を減らすことができ、部品点数の増大を防止すると共に、中央部にも欠損部を複数形成することになるので、導光板の重量を軽減することができる。したがって、導光板の軽量化を図り、かつコストの低減も図ることができる。 As a result, the number of light guides in the light guide plate can be reduced, the increase in the number of parts can be prevented, and a plurality of defective portions can be formed in the central portion, so that the weight of the light guide plate can be reduced. it can. Therefore, the light guide plate can be reduced in weight and the cost can be reduced.
　また、本発明の光源モジュールでは、前記導光体は、長手方向に直交する断面において欠損部である薄肉部を複数個有したものからなっていると共に、前記各光源は、上記導光体における厚肉部の端面から光をそれぞれ入射させるとすることが可能である。 In the light source module of the present invention, the light guide has a plurality of thin portions that are missing portions in a cross section perpendicular to the longitudinal direction, and the light sources are provided in the light guide. It is possible to make light incident from the end face of the thick part.
　これにより、導光板における導光体の数を減らすことができ、部品点数の増大を防止すると共に、中央部にも欠損部を複数形成することになるので、導光板の重量を軽減することができる。したがって、導光板の軽量化を図り、かつコストの低減も図ることができる。 As a result, the number of light guides in the light guide plate can be reduced, the increase in the number of parts can be prevented, and a plurality of defective portions can be formed in the central portion, so that the weight of the light guide plate can be reduced. it can. Therefore, the light guide plate can be reduced in weight and the cost can be reduced.
　また、本発明の光源モジュールでは、前記光路変換部は、上記導光体の少なくとも一方の側端部の出射側又は反射シート側での配設密度が該導光体の他方の側端部若しくは中央部の出射側又は反射シート側での配設密度よりも高密度となるように配設されていることが好ましい。 In the light source module of the present invention, the optical path conversion unit may have an arrangement density on the emission side or the reflection sheet side of at least one side end of the light guide, or the other side end of the light guide or It is preferable that the arrangement density is higher than the arrangement density on the emission side or the reflection sheet side of the central portion.
　すなわち、導光体の少なくとも一方の側端部は、導光体の他方の側端部又は中央部に比べて光源からの光量が少ない。このため、光路変換部を、導光体の少なくとも一方の側端部の出射側又は反射シート側での配設密度が導光体の他方の側端部若しくは中央部の出射側又は反射シート側での配設密度よりも高密度となるように配設することによって、導光体の少なくとも一方の側端部の出射側又は反射シート側からの出射光を増加させることができる。 That is, at least one side end of the light guide has less light from the light source than the other side end or center of the light guide. For this reason, the arrangement density of at least one side end of the light guide on the exit side or the reflection sheet side of the optical path conversion unit is the other end or center of the light guide on the exit side or the reflection sheet side. By arranging so as to be higher than the arrangement density in, the emitted light from the emission side or the reflection sheet side of at least one side end of the light guide can be increased.
　また、本発明の光源モジュールでは、前記光路変換部は、前記Ｔ型導光体部における薄肉部分であるＴ字薄肉部の出射側又は反射シート側での配設密度が前記Ｔ字厚肉部の出射側又は反射シート側での配設密度よりも高密度となるように配設されていることが好ましい。 Moreover, in the light source module of the present invention, the optical path conversion unit has an arrangement density on the emission side or the reflection sheet side of the T-shaped thin portion which is a thin portion in the T-type light guide portion. It is preferable that it is arrange | positioned so that it may become a high density rather than the arrangement | positioning density in the output side or reflective sheet side.
　すなわち、Ｔ型導光体部におけるＴ字薄肉部は、Ｔ字厚肉部に比べて光源からの光量が少ない。このため、光路変換部を、Ｔ型導光体部におけるＴ字薄肉部の出射側又は反射シート側での配設密度がＴ字厚肉部の出射側又は反射シート側での配設密度よりも高密度となるように配設することによって、Ｔ型導光体部におけるＴ字薄肉部の出射側又は反射シート側からの出射光を増加させることができる。 That is, the light amount from the light source is smaller in the T-shaped thin portion in the T-shaped light guide portion than in the T-shaped thick portion. For this reason, the arrangement density of the T-shaped light guide portion on the emission side or the reflection sheet side of the optical path conversion unit is larger than the arrangement density on the emission side or reflection sheet side of the T-shaped thick portion. In addition, by arranging so as to have a high density, it is possible to increase the emitted light from the emission side or the reflection sheet side of the T-shaped thin portion in the T-type light guide.
　また、本発明の光源モジュールでは、前記光路変換部は、前記導光体における薄肉部の出射側又は反射シート側での配設密度が前記厚肉部の出射側又は反射シート側での配設密度よりも高密度となるように配設されていることが好ましい。 Further, in the light source module of the present invention, the optical path conversion unit is disposed on the exit side or the reflection sheet side of the thick portion so that the arrangement density on the exit side or the reflection sheet side of the thin portion in the light guide is set. It is preferable that they are arranged so as to have a higher density than the density.
　すなわち、導光体における薄肉部は、厚肉部に比べて光源からの光量が少ない。このため、光路変換部を、導光体における薄肉部の出射側又は反射シート側での配設密度が厚肉部の出射側又は反射シート側での配設密度よりも高密度となるように配設することによって、導光体における薄肉部の出射側又は反射シート側からの出射光を増加させることができる。 That is, the light portion from the light source is less in the thin portion of the light guide than in the thick portion. For this reason, the optical path conversion unit is arranged such that the arrangement density on the emission side or the reflection sheet side of the thin part in the light guide is higher than the arrangement density on the emission side or the reflection sheet side of the thick part. By arranging, the emitted light from the emission side or the reflection sheet side of the thin portion in the light guide can be increased.
　また、本発明の光源モジュールでは、前記光路変換部は、前記導光体の出射側又は反射シート側のうち欠損部が存在しない側に設けられていることが好ましい。 Moreover, in the light source module of the present invention, it is preferable that the optical path conversion unit is provided on a light exit side or a reflection sheet side of the light guide body on a side where no missing portion exists.
　これにより、光路変換部を印刷によりパターン配置する場合に、導光体の出射側又は反射シート側のうち、凹凸のない平滑な平面に印刷することができる。 Thus, when the optical path changing unit is arranged in a pattern by printing, printing can be performed on a smooth flat surface without any irregularities on the light exit side or the reflection sheet side.
　また、本発明の光源モジュールでは、前記導光体における中央部と該中央部よりも薄く形成された側端部との境界、又は他方の側端部と該他方の側端部よりも薄く形成された一方の側端部との境界における隅角部には、面取りが施されていることが好ましい。 In the light source module of the present invention, the boundary between the central portion of the light guide and the side end formed thinner than the central portion, or the other side end and thinner than the other side end. The corner portion at the boundary with the one side end portion is preferably chamfered.
　これにより、導光体における中央部又は他方の側端部を導光する光が、少なくとも一方の側端部との境界における隅角部にて反射されることによって側端部に導光されないことを防止することができる。したがって、側端部での輝度の低下を抑制することができる。 Thereby, the light which guides the center part in the light guide or the other side end part is not guided to the side end part by being reflected at the corner part at the boundary with at least one side end part. Can be prevented. Therefore, it is possible to suppress a decrease in luminance at the side end.
　また、本発明の光源モジュールでは、前記導光体の複数のＴ型導光体部における薄肉部分であるＴ字薄肉部と該Ｔ型導光体部におけるＴ字厚肉部との境界における各隅角部には、面取りが施されていることが好ましい。 Moreover, in the light source module of this invention, each in the boundary of the T-shaped thin part which is a thin part in the several T type light guide part of the said light guide, and the T-shaped thick part in this T type light guide part The corner portion is preferably chamfered.
　これにより、複数のＴ型導光体部を有する導光体において、Ｔ型導光体部におけるＴ字厚肉部を導光する光が、Ｔ字薄肉部との境界における隅角部にて反射されることによってＴ字薄肉部に導光されないことを防止することができる。したがって、Ｔ字薄肉部での輝度の低下を抑制することができる。 Thereby, in the light guide having a plurality of T-shaped light guide portions, the light that guides the T-shaped thick portion in the T-type light guide portion is transmitted at the corner portion at the boundary with the T-shaped thin portion. It is possible to prevent the light from being guided to the T-shaped thin portion by being reflected. Accordingly, it is possible to suppress a decrease in luminance at the T-shaped thin portion.
　また、本発明の光源モジュールでは、前記導光体の複数の薄肉部と該導光体における厚肉部との境界における各隅角部には、面取りが施されていることが好ましい。 Further, in the light source module of the present invention, it is preferable that each corner portion at the boundary between the plurality of thin portions of the light guide and the thick portion of the light guide is chamfered.
　これにより、複数の薄肉部を有する導光体において、導光体における厚肉部を導光する光が、薄肉部との境界における隅角部にて反射されることによって薄肉部に導光されないことを防止することができる。したがって、薄肉部での輝度の低下を抑制することができる。 Thereby, in the light guide having a plurality of thin portions, the light that guides the thick portions in the light guide is not guided to the thin portions by being reflected at the corners at the boundary with the thin portions. This can be prevented. Accordingly, it is possible to suppress a decrease in luminance at the thin portion.
　また、本発明の光源モジュールでは、前記導光体における中央部又は前記他方の側端部の先端角部には、湾曲状面取りが施されていることが好ましい。 Further, in the light source module of the present invention, it is preferable that a chamfered chamfer is applied to the central corner of the light guide or the tip corner of the other side end.
　これにより、導光体における中央部又は前記他方の側端部にて導光された光が導光体から出射するときに、中央部又は前記他方の側端部の先端角部から出射されないことによって輝度ムラが発生することを防止することができる。すなわち、中央部又は前記他方の側端部の先端角部に湾曲状面取りを施すことによって、湾曲状面取りから光が出射されるので、輝度ムラの発生を防止することができる。 Thereby, when the light guided at the central portion or the other side end portion of the light guide body is emitted from the light guide body, it is not emitted from the tip corner portion of the central portion or the other side end portion. Therefore, it is possible to prevent uneven brightness from occurring. That is, by performing curved chamfering at the central corner or the tip corner of the other side end, light is emitted from the curved chamfering, so that occurrence of uneven brightness can be prevented.
　また、本発明の光源モジュールでは、前記導光体の複数のＴ型導光体部におけるＴ字厚肉部の先端角部には、湾曲状面取りが施されていることが好ましい。 Moreover, in the light source module of the present invention, it is preferable that a curved chamfer is applied to a tip corner portion of the T-shaped thick portion in the plurality of T-type light guide portions of the light guide.
　これにより、複数のＴ型導光体部を有する導光体において、導光体におけるＴ字厚肉部にて導光された光が導光体から出射するときに、Ｔ字厚肉部の先端角部から出射されないことによって輝度ムラが発生することを防止することができる。すなわち、Ｔ字厚肉部の先端角部に湾曲状面取りを施すことによって、湾曲状面取りから光が出射されるので、輝度ムラの発生を防止することができる。 Thereby, in the light guide having a plurality of T-shaped light guide parts, when the light guided by the T-shaped thick part in the light guide is emitted from the light guide, It is possible to prevent the occurrence of uneven brightness by not being emitted from the tip corner. That is, by applying a curved chamfer to the corner of the tip of the T-shaped thick portion, light is emitted from the curved chamfer, so that uneven brightness can be prevented.
　また、本発明の光源モジュールでは、前記導光体の厚肉部の先端角部には、湾曲状面取りが施されていることことが好ましい。 Moreover, in the light source module of the present invention, it is preferable that the chamfered chamfer is applied to the corner portion of the thick portion of the light guide.
　これにより、複数の薄肉部を有する導光体において、導光体における厚肉部にて導光された光が導光体から出射するときに、厚肉部の先端角部から出射されないことによって輝度ムラが発生することを防止することができる。すなわち、厚肉部の先端角部に湾曲状面取りを施すことによって、湾曲状面取りから光が出射されるので、輝度ムラの発生を防止することができる。 Thereby, in the light guide having a plurality of thin portions, when the light guided by the thick portion in the light guide is emitted from the light guide, it is not emitted from the tip corner portion of the thick portion. It is possible to prevent uneven brightness from occurring. That is, since the light is emitted from the curved chamfer by applying the curved chamfer to the corner portion of the thick wall portion, it is possible to prevent the occurrence of luminance unevenness.
　また、本発明の光源モジュールでは、前記導光体の上方には、導光体から出射された光を拡散させる拡散板が該導光体の出射側面から間隔を有して設けられていることが好ましい。 In the light source module of the present invention, a diffusion plate for diffusing light emitted from the light guide is provided above the light guide with a gap from the emission side surface of the light guide. Is preferred.
　すなわち、複数の導光体が、長手方向に対して並列にそれぞれ隙間を有して設けられている導光板においては、上述したように、本発明の構成を有することにより、隙間での輝度ムラの発生を低減することができる。 That is, in the light guide plate in which a plurality of light guides are provided with gaps in parallel with each other in the longitudinal direction, the luminance unevenness in the gaps is obtained by having the configuration of the present invention as described above. Can be reduced.
　このとき、導光体の上方に拡散板を配置する場合に、拡散板を導光体から遠ざける方が、輝度ムラは目立たなくなる。したがって、拡散板を導光体の出射側面に密着して配置するよりも拡散板を導光体の出射側面から間隔を有して設けることによって、輝度ムラの発生を低減することができる。 At this time, when the diffusion plate is disposed above the light guide, the luminance unevenness is less noticeable when the diffusion plate is moved away from the light guide. Therefore, it is possible to reduce occurrence of luminance unevenness by providing the diffusion plate with a space from the emission side surface of the light guide rather than arranging the diffusion plate in close contact with the emission side surface of the light guide.
　本発明は、光源からの光を導光板によって面状に出射させるサイドエッジ（サイドライトともいう）型導光板を備えた光源モジュール、及びそれを備えた電子機器に関するものであり、例えば、バックライト等の光源モジュール及び液晶表示装置等の電子機器に適用可能である。 The present invention relates to a light source module including a side edge (also referred to as a sidelight) type light guide plate that emits light from a light source in a planar shape by a light guide plate, and an electronic device including the light source module. It can be applied to electronic devices such as light source modules and liquid crystal display devices.
　１Ａ　　液晶表示装置（電子機器）
　１Ｂ　　液晶表示装置（電子機器）
　３　　　液晶パネル
１０　　　光源モジュール
１１　　　反射シート
１２　　　ＬＥＤ（光源）
１５　　　拡散板
２０　　　導光板
２１　　　導光体
２１ａ　　端面
２１ｂ　　Ｔ字薄肉部（側端部）
２１ｃ　　Ｔ字厚肉部（中央部）
２１ｄ　　出射面
２１ｅ　　対向面
２１ｆ　　欠損部
２１ｇ　　側壁面
２２　　　隙間
２３　　　光散乱体（光路変換部）
３０　　　Ｔ型導光体部
４１　　　キャタピラ型導光体（導光体）
４１ｂ　　Ｔ字薄肉部（側端部）
４１ｃ　　Ｔ字厚肉部
５０　　　面取り（隅角部の面取り）
５１　　　湾曲状面取り（隅角部の面取り）
５２　　　直線状面取り（隅角部の面取り）
５３　　　直線状面取り（隅角部の面取り）
６０　　　先端角湾曲面取り部（先端角部の湾曲状面取り）
７１　　　導光体
８０　　　固定具
　Ｄ　　　間隔 1A Liquid crystal display device (electronic equipment)
1B Liquid crystal display device (electronic equipment)
3 Liquid Crystal Panel 10 Light Source Module 11 Reflective Sheet 12 LED (Light Source)
15 Diffusion plate 20 Light guide plate 21 Light guide 21a End face 21b T-shaped thin part (side end part)
21c T-shaped thick part (central part)
21d Outgoing surface 21e Opposing surface 21f Defect portion 21g Side wall surface 22 Gap 23 Light scatterer (light path changing portion)
30 T-type light guide part 41 Caterpillar type light guide (light guide)
41b T-shaped thin part (side edge)
41c T-shaped thick part 50 Chamfer (Chamfer at corner)
51 Curved chamfer (Chamfered corner)
52 Straight chamfering (corner chamfering)
53 Straight chamfering (corner chamfering)
60 Tip angle curve chamfer (curved chamfer of tip corner)
71 Light guide 80 Fixing tool D Interval

Claims (19)

  1. 　長手方向に対して並列にそれぞれ隙間を有して設けられた複数の導光体と、上記導光体における長手方向の少なくとも一方の端面から光をそれぞれ入射させる複数の光源と、上記導光体の内部にて導光される光を取り出すために該導光体における光の出射側、又はその反対側である反射シート側に複数設けられている光路変換部とを備えた光源モジュールにおいて、
    　上記導光体における長手方向に直交する断面の少なくとも一方の側端部は、導光体における長手方向に直交する断面の他方の側端部又は中央部よりも薄く形成されていることを特徴とする光源モジュール。     A plurality of light guides provided with gaps in parallel with each other in the longitudinal direction, a plurality of light sources for allowing light to enter from at least one end face in the longitudinal direction of the light guides, and the light guide A light source module including a plurality of optical path conversion units provided on the light emission side of the light guide, or on the reflection sheet side opposite to the light guided in order to extract the light guided inside
    At least one side end of the cross section orthogonal to the longitudinal direction of the light guide is formed thinner than the other side end or center of the cross section orthogonal to the longitudinal direction of the light guide. Light source module.
  2. 　前記導光体の少なくとも一方の側端部は、該導光体の反射シート側に欠損部が設けられていることにより薄く形成されていることを特徴とする請求項１記載の光源モジュール。 2. The light source module according to claim 1, wherein at least one side end portion of the light guide is formed thin by providing a defective portion on the reflective sheet side of the light guide.
  3. 　前記導光体の少なくとも一方の側端部は、該導光体の出射側に欠損部が設けられていることにより薄く形成されていることを特徴とする請求項１記載の光源モジュール。 2. The light source module according to claim 1, wherein at least one side end portion of the light guide is formed thin by providing a defect portion on an emission side of the light guide.
  4. 　前記導光体は、長手方向に直交する断面がＴ字状断面を有するＴ型導光体部を複数個連ねたものからなっていると共に、
    　前記各光源は、上記Ｔ型導光体部における厚肉部分であるＴ字厚肉部の端面から光をそれぞれ入射させることを特徴とする請求項１，２又は３記載の光源モジュール。     The light guide is formed by connecting a plurality of T-shaped light guide portions each having a T-shaped cross section perpendicular to the longitudinal direction.
    4. The light source module according to claim 1, wherein each of the light sources makes light incident from an end face of a T-shaped thick portion which is a thick portion of the T-shaped light guide portion.
  5. 　前記導光体は、長手方向に直交する断面において欠損部である薄肉部を複数個有したものからなっていると共に、
    　前記各光源は、上記導光体における厚肉部の端面から光をそれぞれ入射させることを特徴とする請求項１，２又は３記載の光源モジュール。     The light guide has a plurality of thin portions that are missing portions in a cross section perpendicular to the longitudinal direction, and
    4. The light source module according to claim 1, wherein each of the light sources makes light incident from an end face of a thick portion of the light guide.
  6. 　前記光路変換部は、上記導光体の少なくとも一方の側端部の出射側又は反射シート側での配設密度が該導光体の他方の側端部若しくは中央部の出射側又は反射シート側での配設密度よりも高密度となるように配設されていることを特徴とする請求項１，２又は３記載の光源モジュール。 The optical path conversion unit has an arrangement density on the emission side or the reflection sheet side of at least one side end of the light guide, and the emission side or reflection sheet side of the other side end or center of the light guide. The light source module according to claim 1, wherein the light source module is disposed so as to have a density higher than that of the light source.
  7. 　前記光路変換部は、前記Ｔ型導光体部における薄肉部分であるＴ字薄肉部の出射側又は反射シート側での配設密度が前記Ｔ字厚肉部の出射側又は反射シート側での配設密度よりも高密度となるように配設されていることを特徴とする請求項４記載の光源モジュール。 The optical path conversion unit is arranged such that the disposition density on the emission side or the reflection sheet side of the T-shaped thin part, which is a thin part in the T-shaped light guide unit, is on the emission side or the reflection sheet side of the T-shaped thick part. The light source module according to claim 4, wherein the light source module is disposed so as to have a higher density than the disposed density.
  8. 　前記光路変換部は、前記導光体における薄肉部の出射側又は反射シート側での配設密度が前記厚肉部の出射側又は反射シート側での配設密度よりも高密度となるように配設されていることを特徴とする請求項５記載の光源モジュール。 The optical path conversion unit is arranged such that the arrangement density on the emission side or the reflection sheet side of the thin part in the light guide is higher than the arrangement density on the emission side or the reflection sheet side of the thick part. The light source module according to claim 5, wherein the light source module is disposed.
  9. 　前記光路変換部は、前記導光体の出射側又は反射シート側のうち欠損部が存在しない側に設けられていることを特徴とする請求項６記載の光源モジュール。 The light source module according to claim 6, wherein the light path conversion unit is provided on a light exit side or a reflection sheet side of the light guide body on a side where no defect portion is present.
  10. 　前記光路変換部は、前記導光体の出射側又は反射シート側のうち欠損部が存在しない側に設けられていることを特徴とする請求項７記載の光源モジュール。 The light source module according to claim 7, wherein the light path conversion unit is provided on a light exit side or a reflection sheet side of the light guide body on a side where a defect portion does not exist.
  11. 　前記光路変換部は、前記導光体の出射側又は反射シート側のうち欠損部が存在しない側に設けられていることを特徴とする請求項８記載の光源モジュール。 The light source module according to claim 8, wherein the light path conversion unit is provided on a light exit side or a reflection sheet side of the light guide body on a side where a defect portion does not exist.
  12. 　前記導光体における中央部と該中央部よりも薄く形成された側端部との境界、又は他方の側端部と該他方の側端部よりも薄く形成された一方の側端部との境界における隅角部には、面取りが施されていることを特徴とする請求項１，２，３，６又は９記載の光源モジュール。 The boundary between the central portion of the light guide and the side end portion formed thinner than the central portion, or the other side end portion and one side end portion formed thinner than the other side end portion. The light source module according to claim 1, wherein the corner portion at the boundary is chamfered.
  13. 　前記導光体の複数のＴ型導光体部における薄肉部分であるＴ字薄肉部と該Ｔ型導光体部におけるＴ字厚肉部との境界における各隅角部には、面取りが施されていることを特徴とする請求項４，７又は１０記載の光源モジュール。 Chamfering is applied to each corner portion at the boundary between the T-shaped thin portion that is a thin portion of the plurality of T-shaped light guide portions of the light guide and the T-shaped thick portion of the T-type light guide portion. The light source module according to claim 4, wherein the light source module is provided.
  14. 　前記導光体の複数の薄肉部と該導光体における厚肉部との境界における各隅角部には、面取りが施されていることを特徴とする請求項５，８又は１１記載の光源モジュール。 The light source according to claim 5, 8 or 11, wherein each corner portion at a boundary between a plurality of thin portions of the light guide and a thick portion of the light guide is chamfered. module.
  15. 　前記導光体における中央部又は前記他方の側端部の先端角部には、湾曲状面取りが施されていることを特徴とする請求項１，２，３，６，９又は１２記載の光源モジュール。 The light source according to claim 1, 2, 3, 6, 9 or 12, wherein a chamfered chamfer is applied to a central portion or a tip corner portion of the other side end portion of the light guide. module.
  16. 　前記導光体の複数のＴ型導光体部におけるＴ字厚肉部の先端角部には、湾曲状面取りが施されていることを特徴とする請求項４，７，１０又は１３記載の光源モジュール。 The curved chamfer is given to the front-end | tip corner | angular part of the T-shaped thick part in the several T type light guide part of the said light guide, The Claim 4, 7, 10 or 13 characterized by the above-mentioned. Light source module.
  17. 　前記導光体の厚肉部の先端角部には、湾曲状面取りが施されていることを特徴とする請求項５，８，１１又は１４記載の光源モジュール。 15. The light source module according to claim 5, 8, 11 or 14, wherein a chamfered chamfer is provided at a tip corner of the thick part of the light guide.
  18. 　前記導光体の上方には、導光体から出射された光を拡散させる拡散板が該導光体の出射側面から間隔を有して設けられていることを特徴とする請求項１～１７のいずれか１項に記載の光源モジュール。 A diffusion plate for diffusing light emitted from the light guide is provided above the light guide so as to be spaced from the exit side surface of the light guide. The light source module according to any one of the above.
  19. 　請求項１～１８のいずれか１項に記載の光源モジュールを備えていることを特徴とする電子機器。 An electronic device comprising the light source module according to any one of claims 1 to 18.
PCT/JP2010/060389 2009-06-19 2010-06-18 Light source module and electronic equipment provided therewith WO2010147219A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004112830A (en) * 1995-03-22 2004-04-08 Canon Inc Light guide, illuminator and information processing apparatus
JP2008034372A (en) * 2006-06-30 2008-02-14 Toshiba Corp Lighting system and liquid crystal display
JP2009043706A (en) * 2007-05-16 2009-02-26 Rohm & Haas Denmark Finance As Long and slender light emitting substance structure for lcd display

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004112830A (en) * 1995-03-22 2004-04-08 Canon Inc Light guide, illuminator and information processing apparatus
JP2008034372A (en) * 2006-06-30 2008-02-14 Toshiba Corp Lighting system and liquid crystal display
JP2009043706A (en) * 2007-05-16 2009-02-26 Rohm & Haas Denmark Finance As Long and slender light emitting substance structure for lcd display

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