WO2014069405A1 - 光源ユニット及び表示装置 - Google Patents
光源ユニット及び表示装置 Download PDFInfo
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- WO2014069405A1 WO2014069405A1 PCT/JP2013/079142 JP2013079142W WO2014069405A1 WO 2014069405 A1 WO2014069405 A1 WO 2014069405A1 JP 2013079142 W JP2013079142 W JP 2013079142W WO 2014069405 A1 WO2014069405 A1 WO 2014069405A1
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- WIPO (PCT)
- Prior art keywords
- light source
- light
- source unit
- plate
- guide plate
- Prior art date
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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
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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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
-
- 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
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0031—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
- G02B6/0033—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
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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
- G02B6/0081—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
- 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
- G02B6/0091—Positioning aspects of the light source relative to the light guide
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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
- G02B6/0051—Diffusing sheet or layer
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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
- G02B6/0081—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
- G02B6/0085—Means for removing heat created by the light source from the package
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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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
- G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame
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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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
- G02F1/133322—Mechanical guidance or alignment of LCD panel support components
-
- 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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- 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
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/46—Fixing elements
- G02F2201/465—Snap -fit
Definitions
- the present invention relates to a light source unit that irradiates light to an object and a display device including the light source unit.
- a thin display device that occupies a smaller area than the size of the display screen is generally widely used.
- Many thin display devices display an image on a display panel by light from a backlight unit (light source unit).
- the light source unit includes a direct type in which a light source such as an LED (Light Emitting ⁇ Diode) or a cold cathode fluorescent tube is disposed facing the display panel, a light guide plate facing the display panel, and a light source facing the peripheral surface of the light guide plate. There is an edge light type with.
- a direct type in which a light source such as an LED (Light Emitting ⁇ Diode) or a cold cathode fluorescent tube is disposed facing the display panel, a light guide plate facing the display panel, and a light source facing the peripheral surface of the light guide plate.
- a light source such as an LED (Light Emitting ⁇ Diode) or a cold cathode fluorescent tube is disposed facing the display panel, a light guide plate facing the display panel, and a light source facing the peripheral surface of the light guide plate.
- edge light type light source unit is easy to make the light source unit thinner than the direct type, it is conceivable to use the edge light type light source unit in order to meet the demand for thinning.
- the frame when manufacturing an edge light type light source unit is manufactured while maintaining a narrow frame, the light source, chassis, etc. arranged around the light guide plate may be visually recognized. Therefore, when manufacturing an edge light type light source unit, the frame must be widened.
- the present invention has been made in view of such circumstances, and it is an object of the present invention to provide a light source unit and a display device capable of achieving both a narrow frame and a thin frame.
- a light source unit is a light source unit including a light guide plate, a light source provided on a peripheral surface of the light guide plate, and a reflection unit that reflects light emitted from one surface of the light guide plate, wherein the reflection The portion is located outside the edge of the light guide plate and extends in a direction intersecting the one surface, and a protrusion protruding toward the one surface from a position separated from the one surface in the extended portion And the one surface side of the light source is covered with the projecting portion.
- the light source unit according to the present invention is characterized in that the protruding portion is inclined with respect to the one surface.
- the light source unit according to the present invention is characterized in that an inclination angle of the protruding portion is 30 degrees or more and less than 90 degrees.
- the light source unit according to the present invention is characterized in that a curved surface protruding in a direction intersecting the one surface is formed on the opposite side of the one surface of the protruding portion.
- the light source unit according to the present invention is characterized in that a side opposite to the one surface of the protruding portion is formed in a step shape.
- the light source unit according to the present invention is characterized in that a diffusion sheet for diffusing light is provided on the one surface.
- the light source unit according to the present invention is spaced apart and opposed to the one surface of the light guide plate and is disposed between the diffuser plate and the light guide plate, and has a light transmitting property. And a support part that supports
- the light source unit according to the present invention is spaced apart from the one surface of the light guide plate and diffuses light, an optical sheet superimposed on the diffusion plate, and outside the edge portion of the one surface of the diffusion plate. And a locking piece having a hole extending from the edge of the optical sheet in a direction intersecting the diffusion plate, and the reflecting portion having a protrusion inserted into the hole.
- the light source unit according to the present invention is spaced apart from the one surface of the light guide plate and diffuses light, an optical sheet superimposed on the diffusion plate, and outside the edge portion of the one surface of the diffusion plate. And a locking piece having a hole extending from the edge of the optical sheet in a direction crossing the diffusion plate, and the diffusion plate having a protrusion inserted into the hole.
- a display device includes any one of the light source units described above, a display panel that transmits light emitted from the light source unit, displays an image, and is supported by the reflection unit, and includes the reflection unit. Supports the display panel outside the display area of the display panel.
- a display device includes any one of the light source units described above, a display panel that transmits light emitted from the light source unit, displays an image, and is supported by the reflection unit, and the light source includes It is located in the display area of the display panel, and the protruding portion is located between the light source and the display panel.
- a television receiver includes any one of the display devices described above and a receiving unit that receives a television broadcast, and an image is displayed on the display device based on the television broadcast received by the receiving unit. Is displayed.
- the edge light type light source unit is provided with a protruding portion protruding toward one surface of the light guide plate, and components such as a light source are positioned on the back side of the protruding portion. Moreover, the light emitted from one surface of the light guide plate is reflected by the protruding portion, the luminance is prevented from being lowered at the edge portion, and both the narrowing of the frame and the thinning can be realized.
- FIG. 1 is a perspective view schematically showing a television receiver according to Embodiment 1.
- FIG. It is a fragmentary sectional view which briefly shows the internal structure of a television receiver. It is a graph which shows the relationship between the distance from the LED front-end
- FIG. It is a schematic diagram which shows the relationship between the inclination angle of a reflecting plate, and the dark zone and the bright zone visually recognized on the display surface of a liquid crystal display panel.
- FIG. 10 is a partial cross-sectional view schematically showing an internal configuration of a television receiver according to Embodiment 2.
- FIG. 12 is a partial cross-sectional view schematically showing an internal configuration of a television receiver according to Embodiment 3.
- FIG. It is an expansion perspective view which shows a hook and a locking piece schematically. It is the perspective view which looked at the optical sheet from the back side. It is an expansion expanded view of an optical sheet. It is a fragmentary sectional view which shows the aspect which changed a part of structure of the hook.
- FIG. 1 is a perspective view schematically showing a television receiver.
- reference numeral 1 denotes a television receiver.
- the television receiver 1 is encoded with a display device 100 for displaying video and a tuner 200 (reception unit) for receiving broadcast waves from an antenna (not shown). And a decoder 300 for decoding the broadcast wave.
- the television receiver 1 decodes the broadcast wave received by the tuner 200 by the decoder 300 and displays an image on the display device 100 based on the decoded information.
- the display device 100 includes a rectangular liquid crystal display panel 10 and a light source unit 40 which will be described later.
- the liquid crystal display panel 10 is configured to control the voltage applied to the liquid crystal to adjust the light transmittance.
- the display device 100 is accommodated in the front cabinet 20 and the rear cabinet 30 arranged in the front and rear directions with the display surface of the liquid crystal display panel 10 (the surface on the side visually recognized by the user in a normal use mode) being the front side (hereinafter referred to as the front side). In a normal use mode, the surface on the side viewed by the user is the front, the surface opposite to the front is the back, the front is the front, and the back is the back).
- the front cabinet 20 has a rectangular frame shape, and has a rectangular opening 20a at the center thereof.
- the front cabinet 20 is made of, for example, aluminum.
- the rear cabinet 30 has a rectangular tray shape with the front side open, and is made of, for example, an electrogalvanized steel sheet. In addition, you may comprise the front cabinet 20 and the back cabinet 30 with a resin member.
- the tuner 200 and the decoder 300 are accommodated in the front cabinet 20 and the rear cabinet 30. Note that the tuner 200 and the decoder 300 may be installed outside the display device 100 and connected to the display device 100.
- FIG. 2 is a partial cross-sectional view schematically showing the internal configuration of the television receiver 1.
- the display device 100 includes a liquid crystal display panel 10 and a light source unit 40 that irradiates the liquid crystal display panel 10 with light.
- the light source unit 40 includes a rectangular deep dish-shaped backlight chassis 48, a rectangular light guide plate 41 accommodated in the backlight chassis 48, and an LED 51 that irradiates the light guide plate 41 with light.
- the light guide plate 41 is supported on the bottom surface of the backlight chassis 48.
- a reflection sheet 42 that reflects light is provided on the back surface of the light guide plate 41.
- the front surface (one surface) of the light guide plate 41 is covered with a diffusion sheet 43 that diffuses light.
- An LED substrate 50 on which a plurality of LEDs 51 are mounted is attached to the side surface of the backlight chassis 48 via a heat sink 49.
- the LED 51 faces the peripheral surface of the light guide plate 41.
- the LED substrate 50 may be directly attached to the side surface of the backlight chassis 48 without providing the heat sink 49.
- the front surface of the light guide plate 41 is covered with a diffusion sheet 43 and faces a rectangular diffusion plate 44 that diffuses light.
- the front surface of the diffusion plate 44 is covered with an optical sheet 45 that adjusts the light emission direction.
- the liquid crystal display panel 10 faces the front surface of the diffusion plate 44.
- the liquid crystal display panel 10 and the diffusion plate 44 are supported by a panel chassis 47.
- the panel chassis 47 is a white bowl extending along the edge of the liquid crystal display panel 10.
- the panel chassis 47 has a support body 47 a having an L-shaped cross section that supports the liquid crystal display panel 10 and the diffusion plate 44.
- the support 47a faces the peripheral surface of the diffusion plate 44 and extends toward the edge of the liquid crystal display panel 10, and is perpendicular to the diffusion plate 44 side from the rear side end of the panel support portion 471.
- a diffusion plate support portion 472 that faces the back surface of the diffusion plate 44.
- the front side edge of the panel support portion 471 supports the rear edge of the liquid crystal display panel 10.
- the diffusion plate support portion 472 supports the rear edge of the diffusion plate 44.
- the liquid crystal display panel 10 and the diffusion plate 44 face each other with a predetermined gap.
- a mounting plate 47c extended portion for mounting a bezel 46, which will be described later, to the backlight chassis 48 protrudes from the protruding end of the diffusion plate support portion 472 to the back side.
- a reflection plate 47 b protruding portion that protrudes in the opposite direction to the panel support portion 471 from the protruding end toward the inside of the diffusing plate 44 and obliquely intersects with the diffusing plate 44 is provided.
- the mounting plate 47 c is disposed on the outer surface of the backlight chassis 48.
- the front edge portion of the liquid crystal display panel 10, the peripheral surface of the liquid crystal display panel 10, and the outer surfaces of the support 47a and the mounting plate 47c are covered with a frame-like bezel 46.
- the bezel 46 has a recess 46a in a portion facing the mounting plate 47c.
- a through hole (not shown) is provided in the recess 46a and the mounting plate 47c, and a screw hole (not shown) corresponding to the through hole is provided in the backlight chassis 48.
- a screw 60 is inserted into each through hole, screwed into the screw hole, and the bezel 46, the panel chassis 47, and the backlight chassis 48 are connected.
- the heat radiating plate 49 and the LED substrate 50 are located on the back side of the reflecting plate 47b and are concealed from the front by the reflecting plate 47b.
- the reflection plate 47b covers the front side of the LED 51.
- the tip of the reflection plate 47 b faces the front edge portion of the light guide plate 41, and the reflection plate 47 b is tilted toward the outside of the edge of the light guide plate 41.
- FIG. 3 is a graph showing the relationship between the distance from the tip of the LED 51 in the direction toward the inside of the light guide plate 41 and the relative value of the luminance when the luminance at a position of 50 mm from the tip of the LED 51 to the inside of the light guide plate 41 is 1.
- the distance from the tip of the LED 51 to the tip of the reflector 47b is sufficiently smaller than 50 mm, for example, 25 mm or less.
- FIG. 4 is a schematic diagram showing the relationship between the inclination angle of the reflecting plate 47b and the dark and bright bands visually recognized on the display surface of the liquid crystal display panel 10.
- the hatched portion indicates a dark band
- the non-hatched portion indicates a bright band.
- the tilt angle ⁇ when the tilt angle ⁇ is 20 degrees, the relationship between the distance from the LED 51 tip and the relative value of the luminance is approximately proportional, and as the distance from the LED 51 tip increases from 0 to 50 mm, The relative luminance value increases from approximately 0 to 1.
- the inclination angle ⁇ is 30 degrees, the inclination between the distance from the LED 51 tip is 0 to 10 mm is larger than that at 20 degrees, and at a position where the distance from the LED 51 tip is 10 mm, the inclination angle ⁇ is In the case of 20 degrees, the relative value of the luminance is about 0.25, but when the inclination angle ⁇ is 30 degrees, the relative value of the luminance is about 0.45. As shown in FIG.
- the occupied area of the dark band in the distance range of 0 to 10 mm is smaller than the case where the inclination angle ⁇ is 20 degrees and the distance is close to 0 mm. Therefore, it is difficult for the user to recognize the dark band.
- the relative value of luminance at a position where the distance from the LED 51 tip is 10 mm is approximately 0.7 when the tilt angle ⁇ is 45 degrees, and approximately 0.75 when the tilt angle ⁇ is 57 degrees. When ⁇ is 80 degrees or 90 degrees, it is approximately 0.88.
- the relative value of the brightness is greatly improved, and the area occupied by the dark band in the distance range of 0 to 10 mm is smaller than the case where the inclination angle ⁇ is 30 degrees and the distance is 0 mm. Therefore, the dark belt is more difficult to be recognized by the user.
- the inclination angle ⁇ of the reflection plate 47b is preferably determined in the range of 30 degrees or more and less than 90 degrees in consideration of the luminance in front of the liquid crystal display panel 10, and if it is determined in the range of 45 degrees or more and less than 90 degrees. More preferred.
- the liquid crystal display panel 10 has a larger area than the diffusion plate 44.
- the diffusion plate 44 faces the central portion of the liquid crystal display panel 10, and the edge of the liquid crystal display panel 10 is located outside the diffusion plate 44.
- the liquid crystal display panel 10 includes a display area for displaying video and a non-display area for not displaying video.
- the display area occupies the center of the liquid crystal display panel 10, and the non-display area is located at the peripheral edge of the liquid crystal display panel 10.
- L1 indicates the boundary between the display area and the non-display area, the inside (left side in FIG. 2) from L1 is the display area, and the outside (right side in FIG. 2) is the non-display area.
- the portion where the reflection plate 47 b and the diffusion plate support portion 472 are continuous is located outside the display area of the liquid crystal display panel 10.
- L2 indicates the position of the portion in the direction parallel to the liquid crystal display panel 10, and L2 is positioned outside L1 and positioned in the non-display area.
- the light emitted from the LED 51 enters the light guide plate 41, travels repeatedly by total reflection by the reflection sheet 42 on the back surface and partial reflection by the front surface, and is distributed and emitted from the entire front surface of the light guide plate 41.
- the emitted light is diffused by the diffusion sheet 43 and applied to the diffusion plate 44.
- the light diffused by the diffusion sheet 43 reaches the reflection plate 47b, the light is reflected by the reflection plate 47b and applied to the diffusion plate 44.
- the light applied to the diffusion plate 44 is diffused and passes through the optical sheet 45 to display an image on the liquid crystal display panel 10.
- the LED substrate 50 and the heat sink 49 are located in the display area, but are hidden by the reflector 47b.
- the reflector 47b since the light emitted from the front surface of the light guide plate 41 is reflected by the reflection plate 47b, the shadow of the reflection plate 47b does not appear on the liquid crystal display panel 10, and the luminance of the portion of the liquid crystal display panel 10 facing the reflection plate 47b is reduced. Can be suppressed.
- the reflecting plate 47b since the reflecting plate 47b is inclined, the light reaching the reflecting plate 47b can be efficiently reflected to the front. Further, by setting the inclination angle ⁇ of the reflection plate 47b to be larger than 20 degrees and smaller than 70 degrees, the luminance of the liquid crystal display panel 10 is maintained even when the reflection plate 47b is located in the display area of the liquid crystal display panel 10. be able to.
- the diffusion sheet 43 is provided in front of the light guide plate 41, the light emitted from the light guide plate 41 is directed toward the reflection plate 47b, and more light is reflected by the reflection plate 47b. Further, since the diffusion plate 44 is provided between the liquid crystal display panel 10 and the light guide plate 41, the light incident on the liquid crystal display panel 10 can be made uniform, and the appearance of shadows by the reflection plate 47b can be prevented.
- the panel support portion 471 supports the liquid crystal display panel 10 and the diffusion plate 44 outside the display area, the shadow caused by the panel support portion 471 does not appear on the liquid crystal display panel 10.
- LED51 is located in a display area, since it is concealed by the reflecting plate 47b, it can aim at narrowing a frame and can avoid that LED51 is visually recognized. Further, the edge light type light source unit 40 can be easily made thinner than the direct type.
- FIG. 5 is a partial cross-sectional view schematically showing the internal configuration of the display device according to the first modification.
- a reflecting plate 47b having a curved reflecting surface may be used.
- the curvature of the curved surface is appropriately set in consideration of the reflection efficiency.
- the reflecting surface may be a convex curved surface or a concave curved surface.
- FIG. 6 is a partial cross-sectional view schematically showing the internal configuration of the display device according to the second modification.
- a reflecting plate 47b having a step-like reflecting surface may be used.
- the number of steps, the height of the steps, and the width of the steps are appropriately set in consideration of the reflection efficiency.
- both the panel chassis 47 and 47 have a symmetrical shape in order to ensure the uniformity of luminance.
- the color of the panel chassis 47 may be any color that reflects light, and is not limited to white. For example, it may be silver.
- FIG. 7 is a partial cross-sectional view schematically showing the internal configuration of the television receiver 1.
- the television receiver 1 is disposed between the diffusion plate 44 and the light guide plate 41 and includes a support body 70 (support unit) that supports the diffusion plate 44.
- the support body 70 includes a base plate 71 parallel to the diffusion plate 44 and support pins 72 formed integrally with the base plate 71.
- the support pin 72 has a cone shape and protrudes in a direction perpendicular to both surfaces of the base plate 71.
- the support pins 72 and the base plate 71 are translucent.
- the support 70 is placed between the diffusion plate 44 and the light guide plate 41 with the pointed end of the support pin 72 facing the diffusion plate 44 and the other end placed on the light guide plate 41.
- a gap is provided between the tip of the support pin 72 and the diffusion plate 44, for example, a gap of 0.5 mm or more is provided.
- the edge portion of the base plate 71 is locked to the inclined plate 47b.
- the diffuser plate 44 is bent by its own weight, the diffuser plate 44 is supported by the support pins 72, so that the display quality can be prevented from being deteriorated due to the deflection of the diffuser plate 44. Further, since the base plate 71 and the support pins 72 are translucent, the appearance of shadows on the liquid crystal display panel 10 can be avoided.
- the base plate 71 and the support pins 72 are not limited to integral molding, and a configuration in which a through hole is provided in the base plate 71 and the support pin 72 is inserted and held in the through hole may be employed.
- FIG. 8 is a partial cross-sectional view schematically showing the internal configuration of the television receiver 1.
- FIG. 9 is an enlarged perspective view schematically showing the hook 471a and the locking piece.
- FIG. 11 is an enlarged development view of the optical sheet 45.
- a to C, A ′, B ′, and P indicate the dimensions of the respective portions of the optical sheet 45.
- an L-shaped hook 471a protruding portion protrudes outward from the outer surface of the panel support portion 471.
- the hook 471a includes a portion that protrudes outward from the outer surface of the panel support portion 471, and a portion that protrudes from the protruding end of the portion to the back side and is inclined so that the width becomes narrower toward the back side.
- a plurality of insertion holes 471b for inserting a positioning locking piece 451 or a locking piece 451, which will be described later, are provided in parallel with the panel support part 471 in a part on the front side of the hook 471a of the panel support part 471.
- the vertical width and horizontal width of the optical sheet 45 are the same as or larger than those of the diffusion plate 44.
- a positioning locking piece 451 is provided at the center of the edge portion of the optical sheet 45, and the same number of locking pieces 450 are distributed and arranged on both sides of the positioning locking piece 451. is there.
- the positioning locking pieces 451 and the locking pieces 450 extend from the edge of the optical sheet 45.
- the locking piece 450 has a long rectangular shape along the edge of the optical sheet 45.
- the locking piece 450 is provided on one side or a plurality of sides of the optical sheet 45.
- a perforation 453 is formed on the positioning locking piece 451 and the locking piece 450. The perforation 453 is positioned on the positioning locking piece 451, the boundary between the locking piece 450 and the edge of the optical sheet 45, or on the positioning locking piece 451 side or the locking piece 450 side from the boundary.
- the longitudinal dimension A of the through hole 451a of the positioning locking piece 451 is 0.3 mm longer than the dimension of the hook 471a in the direction along the edge of the optical sheet 45.
- the longitudinal dimension B of the positioning locking piece 451 is 6 mm or more longer than the longitudinal dimension A of the through hole 451a.
- the dimension C between the outer edge of the positioning locking piece 451 and the edge of the through hole 451a is 1.5 mm or more.
- the longitudinal dimension A ′ of the through hole 450 a of the locking piece 450 is longer than the longitudinal dimension A of the through hole 451 a of the positioning locking piece 451.
- the longitudinal dimension B ′ of the locking piece 450 is the same as or longer than the longitudinal dimension B of the positioning locking piece 451.
- the dimension between the outer edge of the locking piece 450 and the edge of the through hole 450a is the same as the dimension C.
- the locking piece 450 and the positioning locking piece 451 are inserted into the insertion hole 471 b so that the perforation 453 is positioned outside the panel support portion 471. Further, as shown in FIGS. 8 to 10, the locking piece 450 and the positioning locking piece 451 are folded to the back side with the perforation 453 as the fold so that the hook 471a is inserted into the through holes 450a and 451a. Yes.
- the hook 471a locks the edge portions of the through holes 450a and 451a.
- the optical sheet 45 is supported by the locking of the locking piece 450 and the positioning locking piece 451.
- the bezel 46 has a through hole 46b at a portion facing the hook 471a, and the hook 471a is inserted into the through hole 46b.
- the front-rear dimension of the hook 471a is preferably 5 mm or more for locking the optical sheet 45. Further, the optical sheet 45 is positioned by inserting the hook 471 a into the through hole 451 a of the positioning locking piece 451.
- the longitudinal dimension A of the through hole 451a is 0.3 mm longer than the dimension of the hook 471a, and the longitudinal dimension A ′ of the through hole 450a is longer than A. Therefore, as shown in FIG. 9, a clearance can be provided between the edge of the through holes 450a and 451a and the hook 471a.
- the longitudinal dimension A ′ of the through hole 450a of the locking piece 450 is longer than A of the through hole 451a of the positioning locking piece 451, even if the optical sheet 45 is thermally expanded or contracted, No wrinkles occur.
- the outer edge portions of the through holes 450 a and 451 a abut against the hook 471 a, and the hook 471 a supports the optical sheet 45.
- the load of the optical sheet 45 is distributed by the plurality of hooks 471a, 471a,.
- the locking piece 450 and the positioning locking piece 451 are bent to the back side of the diffusion plate 44, and the hook 471a is inserted into the through holes 450a and 451a to lock the optical sheet 45. Therefore, the optical sheet 45 can cover the entire front surface of the diffusion plate 44.
- the optical sheet 45 can be suspended from the front surface of the diffusion plate 44 by the weight of the optical sheet 45.
- the edge of the optical sheet 45 can be positioned on the same side as the edge of the diffusion plate 44 or on the outer side, the optical sheet 45 can cover the entire diffusion plate 44 and prevent light leakage. Further, since the edge portion of the optical sheet 45 covers the edge of the diffusion plate 44 and is hidden by the bezel 46, when the user views the television receiver 1 from an oblique direction with respect to the liquid crystal display panel 10, the optical sheet 45 The edge is not visually recognized, and the display quality can be improved.
- FIG.12 and FIG.13 is a fragmentary sectional view which shows the aspect which changed a part of structure of the hook 471a.
- the hook 471a may be formed in a T shape.
- the hook 471a protrudes outward from the side surface of the panel support portion 471, and has a shaft portion having an opening slot groove at the projecting end, and projects from the two ends of the shaft portion to the front side and the back side. And provided with.
- the hook 471a has high flexibility due to the slit, and the hook 471a can be inserted into the through holes 450a and 451a even if the diameter of the tip of the hook 471a is larger than the diameter of the through holes 450a and 451a.
- the hook 471a may be formed in an I shape.
- the hook 471 a includes only a portion protruding outward from the side surface of the panel chassis 47.
- FIGS. 14 and 15 are development views of the optical sheet 45 schematically showing an aspect in which a part of the configuration of the locking piece 450 and the positioning locking piece 451 is changed.
- the locking piece 450 and the positioning locking piece 451 may be formed in a bowl shape.
- the hook 471a is inserted into the central portion of the bowl shape.
- the second through hole 450b may be formed outside the rectangular through hole 450a.
- a second through hole 450b including a circular hole and a hole communicating with the circular hole and the through hole 450a may be formed.
- the outer edge portion of the through hole 450a is easily bent by the second through hole 450b, and the hook 471a can be easily inserted into the through hole 450a.
- FIG. 16 is a partial cross-sectional view schematically showing the internal configuration of the display device in which a part of the configuration of the diffusion plate 44 is changed.
- a hook 441 a protrudes outward from the peripheral surface of the diffusion plate 44.
- the locking piece 450 and the positioning locking piece 451 are located between the peripheral surface of the diffusion plate 44 and the P chassis, and the hooks 441a are provided in the through holes 450a and 451a of the locking piece 450 and the positioning locking piece 451. Inserted.
- the locking piece 450, the positioning locking piece 451, and the hooks 471a and 441a can be applied not only to the edge light type light source unit 40 but also to the direct type light source unit 40 as shown in FIG.
- the LED substrate 50 on which the light source, for example, the LED 51 is mounted is fixed to the bottom surface of the backlight chassis 48.
- the locking piece 450 is provided on the optical sheet 45 closest to the liquid crystal display panel 10, and the locking pieces 450 are not provided on the other optical sheets 45 or the liquid crystal display is the most. Less locking pieces 450 than the optical sheet 45 close to the panel 10 may be provided. This is because if the optical sheet 45 closest to the liquid crystal display panel 10 is locked, the other optical sheets 45 can be prevented from jumping out. It goes without saying that the same number of locking pieces 450 may be provided on all the optical sheets 45. Further, the positioning locking pieces 451 and the locking pieces 450 may be provided in an even number per side of the optical sheet 45, or only a single positioning locking piece 451 may be provided on one side of the optical sheet 45. The positioning locking piece 451 is not necessarily provided at the center of the edge portion of the optical sheet 45, and may be provided at a position away from the center to position the optical sheet 45.
- the light source unit 40 of the television receiver 1 described above can be used for other purposes.
- a transparent or translucent acrylic plate can be provided in front of the light source unit 40 and used as an illuminating device that illuminates the living room with transmitted light. Etc., and can also be used as an advertising device.
- the light source is not limited to the LED 51, and other light sources such as a cold cathode fluorescent tube, organic EL (Eletroluminescence), LD (Laser Diode) may be used.
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Abstract
Description
以下本発明を実施の形態1に係るテレビジョン受信機を示す図面に基づいて詳述する。図1はテレビジョン受信機を略示する斜視図である。
表示装置100は液晶表示パネル10と、該液晶表示パネル10に光を照射する光源ユニット40とを備える。光源ユニット40は矩形深皿状のバックライトシャーシ48と、該バックライトシャーシ48に収容された矩形の導光板41と、該導光板41に光を照射するLED51とを備える。
以下本発明を実施の形態2に係るテレビジョン受信機1を示す図面に基づいて詳述する。図7はテレビジョン受信機1の内部構成を略示する部分断面図である。
以下本発明を実施の形態3に係るテレビジョン受信機1を示す図面に基づいて詳述する。図8はテレビジョン受信機1の内部構成を略示する部分断面図、図9はフック471a及び係止片を略示する拡大斜視図、図10は光学シート45を背面側から見た斜視図、図11は光学シート45の拡大展開図である。図11において、A~C、A′、B′、Pは光学シート45の各部位の寸法を示す。
10 液晶表示パネル
41 導光板
51 LED(光源)
47 パネルシャーシ(反射部)
47b 反射板(突出部分)
47c 取付板(延設部分)
471a フック(突出部)
40 光源ユニット
43 拡散シート
44 拡散板
441a フック(突出部)
45 光学シート
450 係止片
451 位置決め係止片
70 支持体(支持部)
100 表示装置
Claims (11)
- 導光板と、該導光板の周面に対設した光源と、前記導光板の一面から出射した光を反射する反射部とを備える光源ユニットであって、
前記反射部は、
前記導光板の縁の外側に位置し、前記一面に交差する方向に延設された延設部分と、
該延設部分における前記一面から離隔した位置から前記一面に向けて突出した突出部分とを有し、
前記光源の前記一面側は前記突出部分によって覆われていること
を特徴とする光源ユニット。 - 前記突出部分は前記一面に対し傾斜していることを特徴とする請求項1に記載の光源ユニット。
- 前記突出部分の傾斜角度は30度以上90度未満であることを特徴とする請求項2の記載の光源ユニット。
- 前記一面に交差する方向に突出した曲面が前記突出部分の前記一面と反対側に形成してあること
を特徴とする請求項1から3のいずれか一つに記載の光源ユニット。 - 前記突出部分の前記一面と反対側を段状に形成してあること
を特徴とする請求項1から3のいずれか一つに記載の光源ユニット。 - 光を拡散する拡散シートが前記一面に設けてあることを特徴とする請求項1から5のいずれか一つに記載の光源ユニット。
- 前記導光板の前記一面に離隔対向し、光を拡散する拡散板と、
該拡散板及び導光板の間に配してあり、透光性を有し、前記拡散板を支持する支持部と
を備えることを特徴とする請求項1から6のいずれか一つに記載の光源ユニット。 - 前記導光板の前記一面に離隔対向し、光を拡散する拡散板と、
該拡散板に重畳した光学シートと、
前記拡散板の前記一面の縁部分よりも外側に位置し、前記光学シートの縁から前記拡散板に交差する方向に延出し、孔を有する係止片とを備え、
前記反射部は前記孔に挿入される突出部を有すること
を特徴とする請求項1から6のいずれか一つに記載の光源ユニット。 - 前記導光板の前記一面に離隔対向し、光を拡散する拡散板と、
該拡散板に重畳した光学シートと、
前記拡散板の前記一面の縁部分よりも外側に位置し、前記光学シートの縁から前記拡散板に交差する方向に延出し、孔を有する係止片とを備え、
前記拡散板は前記孔に挿入される突出部を有すること
を特徴とする請求項1から6のいずれか一つに記載の光源ユニット。 - 請求項1から9のいずれか一つに記載の光源ユニットと、
該光源ユニットから出射された光を透過して画像を表示し、前記反射部に支持された表示パネルとを備え、
前記反射部は前記表示パネルの表示領域の外側にて前記表示パネルを支持していること
を特徴とする表示装置。 - 請求項1から9のいずれか一つに記載の光源ユニットと、
該光源ユニットから出射された光を透過して画像を表示し、前記反射部に支持された表示パネルとを備え、
前記光源は前記表示パネルの前記表示領域内に位置し、
前記突出部分は前記光源と前記表示パネルとの間に位置すること
を特徴とする表示装置。
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US14/396,565 US9488770B2 (en) | 2012-10-30 | 2013-10-28 | Light source unit and display apparatus |
CN201380021283.1A CN104246352B (zh) | 2012-10-30 | 2013-10-28 | 光源单元以及显示装置 |
JP2014544498A JP5766888B2 (ja) | 2012-10-30 | 2013-10-28 | 光源ユニット及び表示装置 |
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JP2012-239517 | 2012-10-30 | ||
JP2012239517 | 2012-10-30 |
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WO2014069405A1 true WO2014069405A1 (ja) | 2014-05-08 |
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PCT/JP2013/079142 WO2014069405A1 (ja) | 2012-10-30 | 2013-10-28 | 光源ユニット及び表示装置 |
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US (1) | US9488770B2 (ja) |
JP (1) | JP5766888B2 (ja) |
CN (1) | CN104246352B (ja) |
WO (1) | WO2014069405A1 (ja) |
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JP2019159072A (ja) * | 2018-03-13 | 2019-09-19 | シャープ株式会社 | 表示装置およびテレビ受信装置 |
JP7065651B2 (ja) | 2018-03-13 | 2022-05-12 | シャープ株式会社 | 表示装置およびテレビ受信装置 |
JPWO2019230515A1 (ja) * | 2018-05-31 | 2021-04-22 | パナソニックIpマネジメント株式会社 | 画像表示装置 |
JP7325012B2 (ja) | 2018-05-31 | 2023-08-14 | パナソニックIpマネジメント株式会社 | 画像表示装置 |
US11194185B2 (en) | 2020-02-21 | 2021-12-07 | Funai Electric Co., Ltd. | Display device |
Also Published As
Publication number | Publication date |
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US20150078032A1 (en) | 2015-03-19 |
JPWO2014069405A1 (ja) | 2016-09-08 |
CN104246352B (zh) | 2016-02-03 |
JP5766888B2 (ja) | 2015-08-19 |
CN104246352A (zh) | 2014-12-24 |
US9488770B2 (en) | 2016-11-08 |
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