WO2010038583A1 - 照明装置および液晶表示装置 - Google Patents
照明装置および液晶表示装置 Download PDFInfo
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- WO2010038583A1 WO2010038583A1 PCT/JP2009/065576 JP2009065576W WO2010038583A1 WO 2010038583 A1 WO2010038583 A1 WO 2010038583A1 JP 2009065576 W JP2009065576 W JP 2009065576W WO 2010038583 A1 WO2010038583 A1 WO 2010038583A1
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- light
- light guide
- substrate
- light emitting
- hole
- Prior art date
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- 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
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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
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
-
- 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
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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
- G02B6/0075—Arrangements of multiple light guides
- G02B6/0078—Side-by-side arrangements, e.g. for large area displays
- G02B6/008—Side-by-side arrangements, e.g. for large area displays of the partially overlapping type
-
- 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
- G02F1/133608—Direct backlight including particular frames or supporting means
-
- 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
- G02B6/0021—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 for housing at least a part of the light source, e.g. by forming holes or recesses
Definitions
- the present invention relates to an illumination device used as a backlight of a liquid crystal display device, and a liquid crystal display device including the illumination device.
- liquid crystal display devices which are rapidly spreading in place of cathode ray tubes (CRT), have features such as energy-saving, thin, and lightweight types, and are widely used for flat-screen TVs, monitors, mobile phones, and the like.
- CTR cathode ray tubes
- Lighting devices are mainly divided into direct type and edge light type.
- the direct type illumination device a plurality of linear light sources such as cold cathode tubes and hot cathode tubes and point light sources such as light emitting diodes are arranged in parallel behind the liquid crystal panel, and the light emitted from the light source is The liquid crystal panel is directly irradiated.
- the direct type illumination device is easy to obtain high brightness even on a large screen, and is mainly employed as a backlight of a large liquid crystal display of 20 inches or more.
- the edge light type lighting device a light guide is provided behind the liquid crystal panel, and a light source is provided at the lateral end. The light emitted from the light source is reflected by the light guide and indirectly irradiated onto the liquid crystal panel.
- the positional relationship between the light source and the light guide is determined by positioning according to the shape of the housing. Especially in recent lighting devices for mobile phones, in addition to positioning due to the shape of the housing, positioning with a double-sided tape, Some determine the positional relationship between the light source and the light guide. With such a structure, the edge light type lighting device has low luminance but can be thinned, and has excellent luminance uniformity. For this reason, edge light type lighting devices are mainly used as backlights for small and medium-sized displays such as mobile phones and laptop computers.
- the positional relationship between the light source and the light guide has a great influence on the brightness as the lighting device.
- the light incident efficiency to the light guide is improved, and an illumination device with good light utilization efficiency can be obtained.
- the light source and the light guide are disposed a little apart, there is a problem that the light incident efficiency of the light guide is lowered and the brightness as the lighting device is lowered. This problem becomes more prominent when the distance between the light source and the light guide is further increased.
- tandem illumination device a plurality of light guide units configured by combining a light source and a light guide are arranged in parallel to obtain a large illumination device.
- light guide units having different positional relationships with each other are arranged in parallel, the brightness differs for each light guide unit, and the luminance uniformity as an illuminating device becomes very poor. Has a problem.
- the tandem type illumination device employs a mounting technique in which the light guide is fixed while being aligned on the substrate on which the light source is fixedly arranged.
- the light guide is mounted in an incomplete state on the board, it is difficult to distinguish it from the case where it is mounted in a good state, and the product is in a poorly mounted state.
- the product is in a poorly mounted state.
- the present invention has been made in view of the above-described problems, and in a tandem lighting device, by devising a method for fixing and aligning a light source and a light guide, the alignment between the two can be improved.
- An object of the present invention is to realize an illumination device that can perform accuracy, improve luminance uniformity, and easily identify mounting defects of a light guide.
- an illumination device includes a plurality of light emitting units including a light source and a light guide that diffuses light from the light source and emits the light from a light emitting surface.
- Each light guide constituting the light emitting unit has a light emitting part having a light emitting surface and a light guiding part for guiding light from the light source to the light emitting part.
- a lighting device in which a light emitting unit of the other light guide adjacent to the one light guide is arranged side by side on the light guide, the light source being fixedly arranged, and the light guide
- the substrate further includes a substrate connected to the light body, and a protrusion for alignment with the substrate is formed on a surface of the light guide opposite to the substrate, while the substrate has A hole or recess is formed in which the protrusion is fitted, and Fitting portion between the projection and the hole or recess is characterized in that it is disposed closer to the light emitting portion of the light guide body than the connection region between the light guide body and the substrate.
- the illuminating device of the present invention is a so-called tandem type illuminating device, in which a light source is fixedly disposed on a substrate, and the substrate and the light guide are connected using, for example, a connection pin in the connection region. Has been.
- a protrusion for alignment is provided on a surface of the light guide that faces the substrate (also referred to as a back surface of the light guide).
- a recess is formed.
- the fitting part of the said projection part and the said hole or recessed part is a side (namely, connection area
- the substrate and the light guide can be connected while performing alignment by fitting the alignment protrusion and the hole or recess, and on the substrate on which the light source is disposed,
- the light guide can be accurately aligned and arranged. Therefore, for example, if each member is accurately aligned with a position where the light emission efficiency is optimum, an illumination device with high light emission efficiency can be realized.
- the fitting portion between the protrusion of the light guide and the hole or the recess formed in the substrate is closer to the light emitting portion of the light guide than the connection region between the light guide and the substrate. Arranged on the side. That is, the fitting portion is arranged at a position where the distance between the fitting portion and the light emitting portion is shorter than the distance between the connection region and the light emitting portion.
- the guide portion when the projection portion is not properly fitted in the hole or the recess portion is introduced.
- the rising of the tip portion of the light emitting portion of the light body increases. Therefore, according to the above configuration, it is possible to more easily determine when a mounting failure occurs.
- the light guide and the substrate in the connection region between the light guide and the substrate, through holes are formed in the light guide and the substrate, respectively, and the light guides are formed in the through holes. It is preferable that the light guide and the substrate are connected by fitting a coupling member for coupling the substrate and the substrate.
- the light guide and the substrate can be securely fixed and connected.
- the coupling member include a fixing pin or a screw.
- one substrate is provided for a plurality of light emitting units. That is, a plurality of light emitting units may be placed side by side on one substrate.
- the above configuration since a plurality of light emitting units can be aligned with respect to one substrate, it is possible to prevent the light emitting units from being displaced from each other. Thereby, the brightness
- the protrusion is provided on the light guide of the light guide.
- the light traveling in the light guide is affected by the presence of the protrusions, so if the protrusions are provided on the light emitting part side of the light guide, the light emission state in the vicinity of the protrusions is different from the other parts. This causes uneven brightness.
- the projection part is provided in the light guide part, since the light emitted from a light guide is less influenced by a projection part, the light emission state from a light emission part is made uniform. can do.
- the light guide part is closer to the connection region between the light guide and the substrate than the light emitting part. If the fitting portion between the projection and the hole (or recess) is arranged at a position closer to the connection region, the light guide is guided when the projection of the light guide is not properly fitted into the hole or recess of the substrate.
- the tip part of the light emitting part of the body (the tip part farthest from the connection part with the substrate) will rise more greatly. Therefore, according to the above configuration, it is possible to more easily determine when a mounting failure occurs.
- the protrusion is provided at a position closer to the end than the center of the light guide.
- the amount of light traveling through the light guide is larger in the center than in the end of the light guide. As a result, the influence of the protrusions on the light traveling in the light guide can be reduced.
- the illumination device of the present invention it is preferable that a plurality of the protrusions are provided for one light guide.
- the light guide can be aligned on the substrate with higher accuracy.
- the light source and the light guide fixedly arranged on the substrate can be aligned with higher accuracy.
- a hole into which the protrusion is fitted is formed in the substrate, and the length of the protrusion is equal to or greater than the thickness of the substrate.
- the amount of lifting at the tip of the light guide is increased, thereby making it possible to make mounting defects more easily visible.
- the light guide protrusion is difficult to be removed from the substrate hole, it is possible to prevent the light guide from being detached from the substrate even if the coupling member is forgotten to be fitted.
- the substrate has a recess into which the protrusion is fitted, and the length of the protrusion is smaller than the depth of the recess.
- the light guide can be prevented from floating from the substrate in a state where the protrusion of the light guide and the recess of the substrate are fitted.
- the light guide is provided with a hole into which the light source fixedly disposed on the substrate is fitted.
- the light guide and the light source can be accurately aligned, and the light source can be made difficult to shift.
- the liquid crystal display device according to the present invention is characterized by including any one of the illumination devices described above as a backlight.
- the liquid crystal display device having excellent luminance uniformity Can be realized.
- a protrusion for alignment with the substrate is formed on the surface of the light guide facing the substrate, while the protrusion is fitted to the substrate.
- a hole or a recess is formed, and a fitting portion between the protrusion and the hole or the recess is disposed closer to the light emitting portion of the light guide than the connection region between the light guide and the substrate.
- the alignment between the light source and the light guide can be performed with high accuracy, the luminance uniformity can be improved, and the mounting failure of the light guide can be easily identified. it can.
- liquid crystal display device of the present invention includes the illumination device of the present invention as a backlight, it is possible to improve luminance uniformity.
- (A) is a side view which shows the partial structure of the backlight provided in the liquid crystal display device shown in FIG. In this figure, one of the light guides shows a poor mounting state.
- (B) is a side view which shows the partial structure of the backlight of the comparative example of this invention. In this figure, one of the light guides shows a poor mounting state.
- Embodiments of the present invention will be described with reference to FIGS. 1 to 8 as follows. Note that the present invention is not limited to this.
- FIG. 2 shows a configuration of a liquid crystal display device 1 including a tandem illumination device as a backlight.
- the liquid crystal display device 1 includes a backlight 2 (illumination device) and a liquid crystal display panel 3 disposed to face the backlight 2.
- the liquid crystal display panel 3 is the same as a general liquid crystal display panel used in a conventional liquid crystal display device, and although not shown, for example, an active matrix substrate on which a plurality of TFTs (thin film transistors) are formed, and a liquid crystal display panel 3 is opposed thereto. And a liquid crystal layer sealed between the substrates by a sealing material.
- TFTs thin film transistors
- the configuration of the backlight 2 provided in the liquid crystal display device 1 will be described in detail below.
- the backlight 2 is arranged behind the liquid crystal display panel 3 (on the side opposite to the display surface).
- the backlight 2 includes a plurality of light emitting units 11, a diffusion plate 8, an optical sheet 9, and a transparent plate 10.
- the light emitting unit 11 having one light guide 7 and the light emitting unit 11 having the other light guide 17 will be described as examples. Unless otherwise specified, one light guide 7 will be described as an example as a representative of both light guides 7 and 17.
- One light emitting unit 11 includes a light source 5, a light guide 7 that diffuses light from the light source 5 to emit light, a substrate 4 on which the light source 5 is disposed, a reflection sheet 6, and the like.
- the light guide 7 includes a light emitting portion 7b having a light emitting surface 7a and a light guide 7c that guides light from the light source 5 to the light emitting portion 7b.
- the light guide 7c of the light guide 7 is guided to the other light guide 7c. It arrange
- a plurality of light guides 7, 17,... Form a flush light emitting surface (light emitting surface of the entire backlight 2; light emitting region). Such an arrangement is called a tandem arrangement.
- the transparent plate 10, the diffusion plate 8, and the optical sheet 9 are arranged in this order on the upper part of the structure in which the plurality of light emitting units 11 are arranged in tandem as shown in FIG.
- the light guide 7 is mainly made of a transparent resin such as polycarbonate (PC) or polymethyl methacrylate (PMMA), but is not particularly limited, and is preferably made of a material having high light transmittance.
- the light guide 7 can be formed by, for example, injection molding, extrusion molding, hot press molding, cutting, or the like. However, it is not limited to these shaping
- the reflection sheet 6 is provided so as to be in contact with the back surface of the light guide 7 (the surface facing the light emitting surface 7a).
- the reflection sheet 6 reflects light and emits more light from the light emitting surface 7a.
- a plurality of light guides 7 are provided, and a reflection sheet 6 is provided for each of the light guides 7, 17,.
- the diffusion plate 8 is disposed to face the light emitting surface 7a so as to cover the entire flush light emitting surface (light emitting region) formed by the light emitting surfaces 7a of the light guides 7, 17,.
- the diffusion plate 8 diffuses the light emitted from the light emitting surface 7 a of the light guide 7 and irradiates the optical sheet 9.
- “Panlite PC-9391 50HLW” manufactured by Teijin Chemicals Limited having a thickness of 2.0 mm is used as the diffusion plate 8.
- the optical sheet 9 is composed of a plurality of sheets arranged on the front surface side of the light guide 7, uniformizes and collects light emitted from the light emitting surface 7 a of the light guide 7, and displays a liquid crystal display.
- the panel 3 is irradiated. That is, the optical sheet 9 reflects a diffusion sheet that collects and scatters light, a lens sheet that collects light and improves luminance in the front direction (the direction of the liquid crystal display panel), and reflects one polarization component of light. Then, a polarization reflection sheet or the like that improves the luminance of the liquid crystal display device 1 by transmitting the other polarization component can be applied. These are preferably used in appropriate combination depending on the price and performance of the liquid crystal display device 1.
- a diffusion sheet “Light Up 250GM2” manufactured by Kimoto Co., Ltd., a prism sheet (lens sheet), “Thick RBEF” manufactured by Sumitomo 3M Co., Ltd., and a polarizing sheet are used.
- “DBEF-D400” manufactured by Sumitomo 3M Co., Ltd. is used for the (polarization reflection sheet).
- the transparent plate 10 is used when the distance between the light guide 7 and the diffusion plate 8 is kept constant, and forms a light diffusion region.
- the transparent plate 10 is formed of a light transmissive material such as a polyethylene film.
- the transparent plate 10 may be omitted, and the light guide 7 and the diffusion plate 8 may be arranged to face each other.
- the light emitted from the point light source 5 travels through the light guide 7 while receiving the scattering action and the reflection action, and is emitted from the light emitting surface 7a.
- the light emitted from the light emitting surface 7 a passes through the transparent plate 10 disposed on the front surface of the light guide 7, and is then diffused by the diffusion sheet 8 and the optical sheet 9 to be uniformed and collected.
- the liquid crystal display panel 3 is irradiated with light.
- the light guide 7 constituting the light emitting unit 11 causes the light emitted from the light source 5 to emit light from the light emitting surface 7a.
- the light emitting surface 7a is a surface for irradiating the irradiation target with light.
- the light guide 7 has a tandem structure as shown in FIG. That is, the light guide 7 includes a light emitting portion 7b having a light emitting surface 7a and a light guide 7c that guides light from the light source 5 to the light emitting portion 7b.
- the light emitting part 17b of the light guide 17 is arranged so as to ride on.
- a plurality of light guides 7, 17,... Form a flush light emitting surface (light emitting surface of the entire backlight 2; light emitting region).
- FIG. 3 shows a planar configuration of the light guide 7 in the light emitting unit 11.
- the light emitting region (the region of the light emitting surface 7a) is hatched.
- two light source placement holes 15 are formed near the end of the light guide 7 on the light guide 7 c side.
- a protrusion 12 is provided on the back surface of the light guide 7 (the surface opposite to the light emitting surface 7a).
- the protrusion 12 is provided on the light guide 7 c side of the light guide 7.
- the light guide 7 c is located closer to the connection region A between the light guide 7 and the substrate 4 than the light emitting part 7 b. If the fitting part (alignment part) B between the protrusion 12 and the through hole 13 is arranged at a position closer to the connection region A, the protrusion 12 of the light guide 7 is correctly connected to the through hole 13 of the substrate 4. When it is not fitted, the light guide 7 floats more greatly. Therefore, according to the above configuration, it is possible to more easily determine when a mounting failure occurs.
- FIG. 3 shows a planar configuration of the light guide 7 as viewed from the front surface side (the light emitting surface 7a side), but the region where the protrusions 12 are formed is indicated by broken lines.
- the protrusion 12 is provided near the end of the light guide 7 (in other words, closer to the end than the center of the light guide 7). Since the amount of light traveling in the light guide 7 is greater in the center than in the end of the light guide 7, the protrusion 12 is provided at a position close to the end of the light guide. The influence of the protrusion 12 on the light traveling in the light guide can be reduced.
- a hole 21 (through hole) for connection with the substrate 4 is formed in the light guide 7.
- a connecting pin 23 for fixed connection with the substrate 4 is fitted.
- FIG. 4 shows a partial configuration of the substrate 4 constituting the light emitting unit 11. As shown in FIG. 4, a plurality of light sources 5 are fixedly arranged on the substrate 4.
- the light source 5 is a point light source such as a light emitting diode (LED).
- the light source 5 is composed of a plurality of types of light emitting diodes having different emission colors.
- the light source 5 is composed of an LED group in which a plurality of light emitting diodes of three colors of red (R), green (G), and blue (B) are arranged.
- RGB red
- G green
- B blue
- the light source does not necessarily need to be composed of a plurality of types having different emission colors. For example, you may comprise a light source using only one type of LED like white LED.
- the color combination of the light emitting diodes can be appropriately determined based on the color development characteristics of the LEDs of each color and the color development characteristics of the backlight desired according to the purpose of use of the liquid crystal display device 1.
- the light source 5 composed of this LED group is mounted on the substrate 4.
- a side light emitting type LED in which LED chips of respective colors are molded in one package may be used.
- a backlight having a wide color reproduction range can be obtained.
- the light source 5 having the above configuration is fixed and mounted on the substrate 4.
- a through hole (hole) 13 into which the protrusion 12 is fitted is provided in the substrate 4 at a position corresponding to the protrusion 12 formed on the light guide 7.
- a driver (not shown) for controlling lighting of each LED constituting the light source 5 is mounted on the substrate 4. Since the driver is mounted on the same substrate 4 together with the light source 5, the number of substrates can be reduced, and connectors and the like connecting the substrates can be reduced, so that the cost of the apparatus can be reduced. Further, the backlight 2 can be thinned by reducing the number of substrates.
- a hole 22 (through hole) for connection to the light guide 7 is formed in the substrate 4.
- a coupling pin 23 for making a fixed connection with the light guide 7 is fitted.
- the position where one of the light guides 7 is arranged is indicated by a broken line.
- the light source 5 on the substrate 4 and the light source placement hole 15 in the light guide 7 are provided at corresponding positions, and the through hole 13 in the substrate 4 and the light guide 7 are provided in the corresponding positions.
- the formed projections 12 are provided at corresponding positions, and the connection holes 22 (through holes) in the substrate 4 and the connection holes 21 (through holes) in the light guide 7 are at corresponding positions. Is provided.
- FIG. 5 is a plan view showing a partial configuration of the backlight 2 provided in the liquid crystal display device 1 shown in FIG.
- the backlight 2 is formed by arranging a plurality of light emitting units 11 vertically and horizontally.
- the backlight 2 is formed by arranging a plurality of light emitting units 11 vertically and horizontally.
- four light emitting units 11 are arranged in tandem in the vertical direction (x direction) in the drawing, and two light emitting units 11 are arranged in the horizontal direction (y direction) in the drawing. Shows the state.
- the light emitting surface 7a (light emitting region) in each light guide 7 (or 17) is hatched, and the light emitting surface 7a of one light guide 7 and the other arranged so as to ride on it.
- the light emitting surface 7a of the light guide 17 changes the type of hatching.
- the diffusion plate 8, the optical sheet 9, and the transparent plate 10 are not shown.
- one substrate 4 is provided for the plurality of light emitting units 11, 11, 11.
- the relative positioning of each light emitting unit 11 can be more accurately performed. Thereby, the brightness
- This configuration can also reduce the number of substrates.
- the protrusion 12 for alignment with the substrate 4 is provided on the back surface of the light guide 7 (the surface facing the substrate 4).
- the substrate 4 is provided with through holes (holes) 13 into which the projections 12 are fitted at positions corresponding to the projections 12.
- connection holes (through holes) 21 and 22 for connecting the light guide 7 and the substrate 4 to each other are formed at positions corresponding to each other. And the pin 23 is inserted in these connection holes (the connection hole 21 of the light guide 7 and the connection hole 22 of the substrate 4), whereby the light guide 7 and the substrate 4 are fixed. It is connected.
- the alignment projection 12 is formed integrally with the light guide 7. This prevents the accuracy of alignment between the light guide plate and the substrate from being lowered.
- the configuration for fixedly connecting the substrate 4 and the light guide 7 includes a connection hole 22 formed in the substrate 4, a connection hole 21 formed in the light guide 7, and a pin 23. It consists of three parts. Thereby, the light guide 7 can be reliably fixed on the substrate 4 without being displaced.
- the backlight 2 of the present embodiment has the above-described configuration, so that the alignment between the light guide and the light source is performed with high accuracy and the luminance uniformity is improved.
- connection region A between the light source 5 and the light guide 7 and the alignment portion B (fitting portion) between the light source 5 and the light guide 7. By devising, it is possible to easily identify mounting defects of the light guide. This point will be described below with reference to FIGS. 1 (a) and 1 (b).
- FIG. 1A is a side view showing a partial configuration of a backlight 2 provided in the liquid crystal display device 1 of the present embodiment.
- one of the light guides (light guide 17) shows a poor mounting state.
- FIG. 1B shows a partial configuration of a backlight 102 as a comparative example of the present invention.
- one of the light guides shows a poor mounting state.
- FIG. 6 shows a plan configuration of the light guide 107 constituting the light emitting unit 11 of the backlight 102 of the comparative example
- FIG. 7 shows the light emitting unit 11 of the backlight 102 of the comparative example.
- FIG. 8 shows a partial configuration of the backlight 102 of the comparative example.
- FIG. 6 shows a planar configuration of the light guide 107 in the light emitting unit 11.
- the light emitting area area of the light emitting surface 7a
- two light source placement holes 15 are formed near the end of the light guide 107 on the light guide 7 c side.
- a hole 21 (through hole) for connection to the substrate 104 is formed in the light guide 107.
- a connecting pin 23 for fixed connection with the substrate 4 is fitted.
- the structure and arrangement position of the hole 15 and the connection hole 21 it is substantially the same as the light guide 7 shown in FIG.
- the arrangement position of the protrusion 112 is different from that of the light guide 7 shown in FIG.
- the protrusion 112 is the back surface of the light guide 107 on the side farther from the light emitting part 7 b of the light guide 107 than the connection hole 21 (that is, the side opposite to the light emission direction of the light source 5 with respect to the connection hole 21). A surface opposite to the light emitting surface 7a).
- FIG. 7 shows a partial configuration of the substrate 104 constituting the light emitting unit 11.
- the position where one of the light guides 107 is arranged is indicated by a broken line.
- a plurality of light sources 5 are fixedly arranged on the substrate 104.
- a through hole (hole) 113 into which the projection 112 is fitted is provided in the substrate 104 at a position corresponding to the projection 112 formed on the light guide 107.
- a hole 22 (through hole) for connection to the light guide 107 is formed in the substrate 104.
- a coupling pin 23 for making a fixed connection with the light guide 107 is fitted.
- FIG. 8 is a plan view showing a partial configuration of the backlight 102.
- the backlight 102 is formed by arranging a plurality of light emitting units 11 vertically and horizontally.
- the backlight 102 as a partial configuration of the backlight 102, four light emitting units 11 are arranged in tandem in the vertical direction (x direction) in the figure, and two light emitting units 11 are arranged in the horizontal direction (y direction) in the figure. Shows the state.
- the light emitting surface 7a (light emitting region) in each light guide 107 (or 117) is hatched, and the light emitting surface 7a of one light guide 107 and the other arranged so as to ride on it.
- the light emitting surface 7a of the light guide 117 changes the type of hatching.
- the diffusion plate 8, the optical sheet 9, and the transparent plate 10 are not shown.
- the alignment portion B with the light body 7 is closer to the light emitting portion 7b of the light guide body 7 than the connection area A between the light source 5 and the light guide body 7 (that is, with respect to the connection hole 21).
- the alignment portion B is located farther from the light emitting portion 7b of the light guide body 107 than the connection region A (that is, with respect to the connection hole 21).
- the light source 5 is disposed on the opposite side of the light emission direction.
- the position of the alignment portion B is different, so that the state of the light guide when the light guide is mounted in an incomplete state is different.
- the light guide body 117 in the vicinity of the alignment portion B is slightly lifted, while the tip portion of the light guide body 117 (light emission). At the end portion of the surface 7a, the light guide body sinks slightly.
- the rise of the light guide 117 in the vicinity of the alignment portion B and the sinking at the tip portion of the light guide 117 are both small, so that it is difficult to recognize whether the mounting is defective or not. Will occur.
- the alignment portion B is provided closer to the distal end side of the light guide body 17 (side closer to the light emitting portion 7b) than the connection region A.
- the light source 5 is fixedly disposed on the substrate 4 as described above, and the through hole 13 into which the protruding portion 12 of the light guide 7 is fitted is formed on the substrate 4. Is provided. With this configuration, the light guide 7 can be accurately aligned and disposed on the substrate 4 on which the light source 5 is disposed.
- the substrate 4 and the light guide 7 are accurately aligned as described above, and the coupling pins 23 are fitted into the respective connection holes 21 and 22 so that the positional deviation occurs. It is fixed not to.
- the substrate 4 and the light guide 7 are prevented from being displaced, and the relative positional relationship between the light source 5 and the light guide 7 is set between the plurality of light emitting units 11, 11, 11. , Can be evenly aligned. Therefore, the light emission state of each light emitting unit 11 can be made uniform, and the luminance uniformity of the backlight 2 can be improved.
- the state in which the light guide 7 is incompletely mounted on the substrate 4 can be easily identified, so the ratio of being productized in a poorly mounted state is reduced. The occurrence rate of mounting defects can be reduced.
- the length (the height of the protrusion) of the protrusion 12 provided in the light guide 7 is the thickness of the substrate 4.
- the thickness can be about 1.5 times the thickness of the substrate 4.
- the length of the protrusion is preferably 1.5 mm.
- the substrate 4 is exemplified by the configuration in which the through hole 13 is formed as a member for alignment with the light guide 7.
- the present invention is not limited to this. Instead, the substrate 4 may be provided with a recess as an alignment member.
- the length (projection height) of a projection part is smaller than the depth of the said recessed part. . Thereby, it can prevent that a light guide floats from a board
- a configuration in which two alignment projections 12 are provided on one light guide 7 is taken as an example, but the present invention is not limited to this configuration.
- connection region between the light guide and the substrate through holes are formed in the light guide and the substrate, respectively, and a connecting member such as a pin or a screw, which is a separate member, is connected to each of the above-described through holes.
- a connecting member such as a pin or a screw, which is a separate member, is connected to each of the above-described through holes.
- the present invention is not limited to this configuration, and, for example, a configuration in which the light guide and the substrate are connected using an adhesive, a double-sided tape, or the like is also included in the scope of the present invention.
- an illuminating device with improved luminance uniformity can be realized.
- the illumination device of the present invention can be used as a backlight of a liquid crystal display device.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
Description
2 バックライト(照明装置)
3 液晶表示パネル
4 基板
5 光源
6 反射シート
7 導光体
17 導光体
7a 発光面
7b 発光部
7c 導光部
11 発光ユニット
12 突起部
13 貫通孔(孔または凹部)
21 接続用穴(貫通孔)
22 接続用穴(貫通孔)
23 ピン(結合部材)
A 接続領域
B 位置合わせ部(嵌合部)
Claims (10)
- 光源、および、該光源からの光を拡散させて発光面から出射させる導光体を含む発光ユニットを複数個備え、
上記複数個の発光ユニットを構成する各導光体は、発光面を有する発光部と、該発光部へ上記光源からの光を導く導光部とを有し、上記発光ユニットは、一方の導光体の導光部に、該一方の導光体に隣り合う他方の導光体の発光部が乗り上げるようにして並んで配置されている照明装置であって、
上記光源を固定配置し、かつ、上記導光体と接続している基板をさらに備えているとともに、
上記導光体における上記基板との対向面には、上記基板との位置合わせ用の突起部が形成されている一方、上記基板には、上記突起部が嵌合する孔または凹部が形成されており、
上記突起部と上記孔または凹部との嵌合部は、上記導光体と上記基板との接続領域よりも上記導光体の発光部に近い側に配置されていることを特徴とする照明装置。 - 上記導光体と上記基板との接続領域において、上記導光体および上記基板には、それぞれ貫通孔が形成されており、
上記の各貫通孔に、上記導光体と上記基板とを結合するための結合部材を嵌め込むことによって、上記導光体と上記基板とは接続されていることを特徴とする請求項1に記載の照明装置。 - 上記基板は、複数の発光ユニットに対して1つ設けられていることを特徴とする請求項1または2に記載の照明装置。
- 上記突起部は、上記導光体の導光部に設けられていることを特徴とする請求項1~3の何れか1項に記載の照明装置。
- 上記突起部は、上記導光体の中央部よりも端部に近い位置に設けられていることを特徴とする請求項1~4の何れか1項に記載の照明装置。
- 上記突起部は、一つの導光体に対して複数個設けられていることを特徴とする請求項1~5の何れか1項に記載の照明装置。
- 上記基板には上記突起部が嵌合する孔が形成されており、上記突起部の長さは上記基板の厚さ以上となっていることを特徴とする請求項1~6の何れか1項に記載の照明装置。
- 上記基板には上記突起部が嵌合する凹部が形成されており、上記突起部の長さは上記凹部の深さよりも小さくなっていることを特徴とする請求項1~6の何れか1項に記載の照明装置。
- 上記導光体には、上記基板上に固定配置された上記光源が嵌り込む孔が形成されていることを特徴とする請求項1~8の何れか1項に記載の照明装置。
- 請求項1~9の何れか1項に記載の照明装置をバックライトとして備えていることを特徴とする液晶表示装置。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200980134769XA CN102144121A (zh) | 2008-09-30 | 2009-09-07 | 照明装置和液晶显示装置 |
JP2010531799A JP5043198B2 (ja) | 2008-09-30 | 2009-09-07 | 照明装置および液晶表示装置 |
EP09817620A EP2322844A4 (en) | 2008-09-30 | 2009-09-07 | LIGHTING DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE |
BRPI0920737A BRPI0920737A2 (pt) | 2008-09-30 | 2009-09-07 | dispositivo de iluminação e dispositivo de display de cristal líquido |
US13/062,002 US20110157517A1 (en) | 2008-09-30 | 2009-09-07 | Illumination device and liquid crystal display device |
RU2011110696/07A RU2470215C2 (ru) | 2008-09-30 | 2009-09-07 | Устройство освещения и жидкокристаллическое устройство отображения |
Applications Claiming Priority (2)
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JP2008254405 | 2008-09-30 | ||
JP2008-254405 | 2008-09-30 |
Publications (1)
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WO2010038583A1 true WO2010038583A1 (ja) | 2010-04-08 |
Family
ID=42073355
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2009/065576 WO2010038583A1 (ja) | 2008-09-30 | 2009-09-07 | 照明装置および液晶表示装置 |
Country Status (7)
Country | Link |
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US (1) | US20110157517A1 (ja) |
EP (1) | EP2322844A4 (ja) |
JP (1) | JP5043198B2 (ja) |
CN (1) | CN102144121A (ja) |
BR (1) | BRPI0920737A2 (ja) |
RU (1) | RU2470215C2 (ja) |
WO (1) | WO2010038583A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2400323A1 (en) * | 2010-06-28 | 2011-12-28 | Hitachi Consumer Electronics Co. Ltd. | Liquid crystal display device, backlight and LED |
EP2416190A1 (en) * | 2010-08-02 | 2012-02-08 | Hitachi Consumer Electronics Co. Ltd. | Illumination device and display apparatus using the same |
JP2012032505A (ja) * | 2010-07-29 | 2012-02-16 | Hitachi Consumer Electronics Co Ltd | 映像表示装置 |
KR20120085378A (ko) * | 2011-01-24 | 2012-08-01 | 삼성전자주식회사 | 광가이드바, 이를 포함하는 백라이트 어셈블리 및 이를 포함하는 표시장치 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111308606A (zh) * | 2018-12-12 | 2020-06-19 | 元太科技工业股份有限公司 | 导光组件及反射式显示装置 |
TWI730271B (zh) | 2018-12-12 | 2021-06-11 | 元太科技工業股份有限公司 | 導光組件及反射式顯示裝置 |
US11073251B2 (en) * | 2019-04-23 | 2021-07-27 | Lumileds Llc | Flexible printed wiring structure for LED light engine |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11288611A (ja) * | 1998-03-31 | 1999-10-19 | Nitto Jushi Kogyo Kk | タンデム型面光源装置 |
JP2001312916A (ja) | 2000-02-24 | 2001-11-09 | Sony Corp | 面光源装置 |
JP2004184493A (ja) * | 2002-11-29 | 2004-07-02 | Seiko Epson Corp | 電気光学装置、電気光学装置の製造方法、および電子機器 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1106913B1 (de) * | 1999-12-08 | 2005-05-25 | MENTOR GMBH & CO. | Leiterplattenmontierbares Anzeigeelement |
RU2174725C1 (ru) * | 2000-12-27 | 2001-10-10 | Дыхне Александр Михайлович | Способ изготовления оптического световодного устройства для передачи изображения (его варианты) |
TW548479B (en) * | 2001-02-27 | 2003-08-21 | Matsushita Electric Ind Co Ltd | Display device, display panel for the device, and the manufacturing method thereof |
JP3760900B2 (ja) * | 2001-09-06 | 2006-03-29 | セイコーエプソン株式会社 | 導光装置、電気光学装置及び電子機器 |
JP2006066129A (ja) * | 2004-08-25 | 2006-03-09 | Sakari:Kk | バックライト |
RU44410U1 (ru) * | 2004-10-27 | 2005-03-10 | Общество с ограниченной ответственностью "4 лайтс Си.Пи." | Универсальная световая панель |
RU44408U1 (ru) * | 2004-10-27 | 2005-03-10 | Общество с ограниченной ответственностью "4 лайтс Си.Пи." | Универсальная световая панель |
TWI293702B (en) * | 2005-03-17 | 2008-02-21 | Au Optronics Corp | Backlight modules |
CN100595481C (zh) * | 2005-07-04 | 2010-03-24 | 松下电器产业株式会社 | 线状光源装置、面发光装置以及液晶显示装置 |
US8269918B2 (en) * | 2006-10-27 | 2012-09-18 | Sharp Kabushiki Kaisha | Light source with overlapping light guide elements for liquid crystal display device |
WO2010126226A2 (en) * | 2009-04-27 | 2010-11-04 | Lg Electronics Inc. | Back light unit and display device using the same |
-
2009
- 2009-09-07 US US13/062,002 patent/US20110157517A1/en not_active Abandoned
- 2009-09-07 EP EP09817620A patent/EP2322844A4/en not_active Withdrawn
- 2009-09-07 CN CN200980134769XA patent/CN102144121A/zh active Pending
- 2009-09-07 RU RU2011110696/07A patent/RU2470215C2/ru not_active IP Right Cessation
- 2009-09-07 WO PCT/JP2009/065576 patent/WO2010038583A1/ja active Application Filing
- 2009-09-07 JP JP2010531799A patent/JP5043198B2/ja not_active Expired - Fee Related
- 2009-09-07 BR BRPI0920737A patent/BRPI0920737A2/pt not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11288611A (ja) * | 1998-03-31 | 1999-10-19 | Nitto Jushi Kogyo Kk | タンデム型面光源装置 |
JP2001312916A (ja) | 2000-02-24 | 2001-11-09 | Sony Corp | 面光源装置 |
JP2004184493A (ja) * | 2002-11-29 | 2004-07-02 | Seiko Epson Corp | 電気光学装置、電気光学装置の製造方法、および電子機器 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2322844A4 * |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2400323A1 (en) * | 2010-06-28 | 2011-12-28 | Hitachi Consumer Electronics Co. Ltd. | Liquid crystal display device, backlight and LED |
CN102298233A (zh) * | 2010-06-28 | 2011-12-28 | 日立民用电子株式会社 | 液晶显示装置、背光源以及led |
US8596848B2 (en) | 2010-06-28 | 2013-12-03 | Hitachi Consumer Electronics Co., Ltd. | Liquid crystal display device, backlight and LED |
TWI452391B (zh) * | 2010-06-28 | 2014-09-11 | Hitachi Consumer Electronics | Liquid crystal display device, backlight and light emitting diode |
JP2012032505A (ja) * | 2010-07-29 | 2012-02-16 | Hitachi Consumer Electronics Co Ltd | 映像表示装置 |
EP2416190A1 (en) * | 2010-08-02 | 2012-02-08 | Hitachi Consumer Electronics Co. Ltd. | Illumination device and display apparatus using the same |
KR20120085378A (ko) * | 2011-01-24 | 2012-08-01 | 삼성전자주식회사 | 광가이드바, 이를 포함하는 백라이트 어셈블리 및 이를 포함하는 표시장치 |
KR101867283B1 (ko) * | 2011-01-24 | 2018-06-15 | 삼성디스플레이 주식회사 | 광가이드바, 이를 포함하는 백라이트 어셈블리 및 이를 포함하는 표시장치 |
Also Published As
Publication number | Publication date |
---|---|
CN102144121A (zh) | 2011-08-03 |
US20110157517A1 (en) | 2011-06-30 |
RU2470215C2 (ru) | 2012-12-20 |
RU2011110696A (ru) | 2012-09-27 |
EP2322844A1 (en) | 2011-05-18 |
JP5043198B2 (ja) | 2012-10-10 |
JPWO2010038583A1 (ja) | 2012-03-01 |
EP2322844A4 (en) | 2011-08-17 |
BRPI0920737A2 (pt) | 2016-05-17 |
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