WO2016136146A1 - 表示装置 - Google Patents
表示装置 Download PDFInfo
- Publication number
- WO2016136146A1 WO2016136146A1 PCT/JP2016/000513 JP2016000513W WO2016136146A1 WO 2016136146 A1 WO2016136146 A1 WO 2016136146A1 JP 2016000513 W JP2016000513 W JP 2016000513W WO 2016136146 A1 WO2016136146 A1 WO 2016136146A1
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- WO
- WIPO (PCT)
- Prior art keywords
- display panel
- back plate
- display device
- light
- attached
- Prior art date
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Classifications
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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
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- G—PHYSICS
- G02—OPTICS
- 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
- 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
- G02F1/133612—Electrical details
Definitions
- This disclosure relates to a display device that displays images such as still images and moving images.
- a display device such as a monitor for a television or a computer
- a thin display device such as a liquid crystal panel or an organic EL (Electro Luminescence) display panel.
- the liquid crystal display device is a display device that does not emit light. Therefore, in the liquid crystal display device, a light source is disposed on the back surface (opposite to the user) of the display panel included in the display device so that the user can recognize an image even in a dark place, and the light transmitted through the display panel is transmitted to the user. It is configured to reach.
- the display device having such a configuration has, for example, a configuration in which dot-like light sources (point light sources) composed of LEDs (Light Emitting Diodes) or the like are arranged in a matrix at intervals. Therefore, the display device may include a reflection sheet for reflecting the light that has been emitted from the light emission source and travels to the opposite side of the display panel to the display panel side.
- dot-like light sources point light sources
- LEDs Light Emitting Diodes
- Patent Document 1 discloses a display device in which a reflective sheet is attached to a back plate to which a light emitting source is attached.
- the reflection sheet has an outer peripheral portion rising on the light emitting side of the light emitting source.
- the display device having such a configuration, light is transmitted between the display panel and the light source so that luminance unevenness does not occur in the light transmitted through the display panel and light is transmitted through the display panel with a uniform amount of light.
- a diffusing diffuser is disposed.
- the diffusion plate may be printed in a region where the amount of light transmitted is relatively large (bright) to limit the amount of light transmitted. is there.
- Limiting the amount of light transmitted by printing on the diffusion plate ensures the uniformity of the amount of light in a state where the brightness of the display panel is lowered, resulting in energy waste. Further, a printing process is required in the manufacturing process, and the process for manufacturing the display device becomes complicated.
- the present disclosure provides a display device with high luminous efficiency that can suppress uneven brightness of the display panel while maintaining the brightness of the display panel at a high level.
- the display device includes a display panel that displays an image, a plurality of light emission sources, a back plate to which the light emission sources are attached, and a reflection sheet.
- the plurality of light emitting sources emit light from the back side of the display panel toward the display panel, and are arranged in a matrix along the display panel.
- the reflection sheet is attached to the back plate, has an insertion hole into which the light source is inserted, and reflects light emitted from the light source.
- a backplate is provided with the some protrusion part which bulges a part of reflection sheet toward a display panel in the state in which the reflection sheet was attached.
- the display device can reduce luminance unevenness while ensuring high luminance.
- FIG. 1 is a perspective view schematically showing an example of the appearance of the display device according to the first embodiment.
- FIG. 2 is an exploded perspective view schematically showing an example of the structure of the display device in the first embodiment.
- FIG. 3 is a perspective view schematically showing an example of the light emitting module in the first embodiment.
- FIG. 4 is a perspective view schematically showing an example of the reflection sheet in the first embodiment.
- FIG. 5 is a perspective view schematically showing an example of the back plate and the protrusions in the first embodiment.
- FIG. 6 is a perspective view schematically showing an example of the back plate before the reflection sheet in Embodiment 1 is attached.
- FIG. 7 is a cross-sectional view of the back plate before attaching the reflection sheet in the first embodiment.
- FIG. 8 is a cross-sectional view of the back plate to which the reflective sheet in Embodiment 1 is attached.
- FIG. 9 is a cross-sectional view of the back plate to which the reflective sheet in Embodiment 1 is
- FIG. 1 is a perspective view schematically showing an example of the appearance of the display device 100 according to the first embodiment.
- FIG. 2 is an exploded perspective view schematically showing an example of the structure of the display device 100 according to the first embodiment.
- the XYZ axes will be used as necessary.
- the direction parallel (substantially parallel) to the longitudinal direction of the display device 100 is taken as the X axis
- the direction parallel (substantially parallel) to the lateral direction of the display device 100 is designated Y.
- a direction perpendicular to both the X axis and the Y axis is taken as the Z axis.
- the vertical direction with respect to the XZ plane, that is, the Y-axis direction is the direction of gravity
- the display device 100 is installed on an installation surface parallel (substantially parallel) to the XZ plane under normal use conditions.
- the side facing the user (not shown) who views the display device 100 is referred to as “front”, the opposite side of the front is referred to as “back”, and the side relatively far in the Y-axis direction from the installation surface is “ “Up” is defined as “down” and the direction relatively close to the installation surface in the Y-axis direction is defined as “down”. Note that these directions are relative for convenience and are not absolute.
- the display device 100 includes a frame body 101, a front member 102, a display panel 103, a light emitting unit 140, a protrusion 107, a back plate 108, and a back cover 109.
- the display device 100 described in this embodiment is, for example, a television that outputs video and audio obtained from received broadcast waves and the like, and includes a circuit board (not shown) and the like. Since the configuration as a television is substantially the same as a generally known configuration, description thereof is omitted.
- the frame body 101, the front member 102, and the back cover 109 are members that cover the display panel 103, the light emitting unit 140, and the like.
- the frame body 101 is a member that protects the outer periphery of the display panel 103 and the like.
- the front member 102 is a transparent member that covers the front surface of the display panel 103.
- the back cover 109 is a member that protects the back surface of the display panel 103 and the like.
- the display panel 103 is a device that displays an image based on an input video signal.
- the images include still images, moving images, and the like, and characters and symbols are also included in the images.
- the display panel 103 described in this embodiment is a liquid crystal display panel. Further, the thickness of the display panel 103 is, for example, about 1 mm to 3 mm. In the present disclosure, the type of the display panel 103 is not particularly limited. The display panel 103 only needs to be light that transmits the display panel 103 when displaying an image.
- the light emitting unit 140 is a member for radiating light having substantially uniform luminance to the back surface of the display panel 103, and is generally called “backlight” or the like.
- the light emitting unit 140 includes the diffusion plate 104, the reflection sheet 105, and the light emitting module 106.
- FIG. 3 is a perspective view schematically showing an example of the light emitting module 106 according to the first embodiment.
- the light emitting module 106 is obtained by attaching a plurality of light emitting sources 161 included in the display device 100 to a wiring board 162.
- the light emitting module 106 is for making it possible to easily arrange the light emitting source 161 with respect to the back plate 108.
- the light emitting sources 161 can be arranged in a matrix along the display panel 103.
- the wiring board 162 includes a connector 163 for connecting the electric wire 164.
- the wiring board 162 includes a conductive member (for example, a printed wiring) that electrically connects the connector 163 and the light emission source 161.
- a conductive member for example, a printed wiring
- electric power supplied from the electric wire 164 connected to the connector 163 is supplied to the light emitting source 161 attached to the wiring board 162. Thereby, the light emission source 161 attached to the wiring board 162 is turned on.
- the surface on which the light emission source 161 is attached is provided with a layer having a higher light reflectance than the main body of the wiring substrate 162.
- the wiring board 162 of the present embodiment includes, for example, a white resist film as a layer having a high light reflectance.
- the diameter of an insertion hole (described later) provided in the reflection sheet 105 is larger than the outer shape of the light emitting source 161, and the wiring board 162 disposed on the back side of the reflection sheet 105. Even when a part of the display panel 103 can be seen through the insertion hole, the reflectance of light on the surface of the wiring board 162 is high, so that it is possible to suppress the occurrence of uneven brightness in the display panel 103.
- the light emitting sources 161 are arranged in a matrix along the display panel 103 (along the X axis and the Y axis shown in FIG. 3).
- the light emission source 161 is a component that emits light from the back side of the display panel 103 toward the display panel 103.
- the type of the light emission source 161 is not particularly limited, but as the light emission source 161, for example, a white LED capable of emitting white light, which is a combination of a blue light emitting diode and a yellow fluorescent material, etc. Can be illustrated.
- the diffusion plate 104 is a member that diffuses light emitted from a plurality of light emitting sources 161 (point light sources) of the plurality of light emitting modules 106.
- the diffusing plate 104 diffuses incident light substantially in all directions, reduces the viewing angle dependency of the luminance of outgoing light, and substantially equalizes the luminance of outgoing light.
- the diffusing plate 104 is a plate-shaped transparent member having fine irregularities on both sides or only one side.
- fine particles having high reflectance may be dispersed and arranged inside the diffusion plate 104.
- the diffusing plate 104 may be a laminate of a plurality of films having fine irregularities.
- FIG. 4 is a perspective view schematically showing an example of the reflection sheet 105 in the first embodiment.
- FIG. 4 shows the reflection sheet 105 before being attached to the back plate 108.
- the reflection sheet 105 is a member that reflects the light emitted from the light emitting source 161 toward the display panel 103. As shown in FIG. 4, the reflection sheet 105 has an insertion hole 151 into which the light emission source 161 is inserted. In the reflection sheet 105, each insertion hole 151 is formed at a position corresponding to the light emission source 161 disposed on the back plate 108. Note that the diameter of the insertion hole 151 may be set larger than the outer shape of the light source 161 so that the light source 161 can be easily inserted into the insertion hole 151.
- the material of the reflection sheet 105 is not particularly limited, but as the reflection sheet 105, for example, a sheet-like member made of a synthetic resin such as white PET (polyethylene terephthalate) having excellent light reflectivity may be exemplified. it can.
- the reflection sheet 105 has flexibility (stretchability) that can bulge (deform) by being partially pushed out by the protruding portion 107 (see FIGS. 2 and 5).
- the reflection sheet 105 has a cut portion 152 at a position corresponding to the connector 163 provided on the wiring board 162.
- the cut portion 152 is provided with an H-shaped cut in the reflective sheet 105, and is formed so that a part of the reflective sheet 105 rises along the cut.
- the cut portion 152 has a structure in which the upper portion of the cut portion 152 rises when the connector 163 is inserted into the cut portion 152 and the lower portion of the cut portion 152 rises by the electric wire 164.
- the rising part of the reflection sheet 105 covers at least a part of the connector 163. Further, the rising part of the reflection sheet 105 covers at least a part of the electric wire 164 in a state where generation of wrinkles and the like is reduced.
- the cut portion 152 is provided in a portion of the reflection sheet 105 corresponding to the connector 163.
- a part of the reflection sheet 105 bulges toward the display panel 103 by the connector 163 protruding from the wiring board 162. Accordingly, it is possible to prevent uneven brightness from occurring in the light irradiated on the display panel 103.
- the reflective sheet 105 with the notch 152 corresponding to the connector 163, it is possible to suppress the connector 163 from being exposed on the surface of the reflective sheet 105, and to prevent uneven brightness generated by the connector 163. The same applies to the electric wire 164 connected to the connector 163.
- FIG. 5 is a perspective view schematically showing an example of the back plate 108 and the protrusion 107 in the first embodiment.
- the back plate 108 is a plate-like member that holds the display panel 103, and is arranged on the back side (surface on the negative direction side of the Z axis) side of the display panel 103 as shown in FIG.
- the back plate 108 holds the light emitting unit 140 between the display panel 103 and the back plate 108, and holds a circuit board (not shown) or the like on the back of the back plate 108.
- the back plate 108 is formed using, for example, a metal plate generally called “chassis”. Further, the back plate 108 is provided with irregularities by press working or the like in order to improve the structural strength.
- the back plate 108 shown in the present embodiment includes a recess 181 that extends in the longitudinal direction (X-axis direction) of the back plate 108.
- the wiring board 162 is placed in the recess 181.
- a boss or the like for screwing may be attached to the back plate 108.
- the back plate 108 is disposed so as to cover the entire back surface (or almost the entire surface) of the display panel 103 and may have a function of radiating heat generated in the display panel 103.
- the protruding portion 107 is a rectangular bar-shaped member attached to the back plate 108.
- the protrusion 107 is attached to the back plate 108 to bulge a part of the reflection sheet 105 toward the display panel 103 side.
- the protruding portion 107 protrudes toward the display panel 103 side on the attachment surface (surface having the same height as the surface of the wiring board 162 on the display panel 103 side) of the back plate 108.
- the protruding portion 107 is disposed between the light emitting sources 161 (in the center position) and extends along the extending direction of the light emitting module 106.
- FIG. 6 is a perspective view schematically showing an example of the back plate 108 before the reflection sheet 105 according to Embodiment 1 is attached.
- FIG. 6 shows the back plate 108 to which the light emitting module 106 and the protrusion 107 are attached.
- FIG. 7 is a cross-sectional view of the back plate 108 before the reflection sheet 105 according to Embodiment 1 is attached.
- FIG. 7 shows a part of a cross-sectional view taken along line VII-VII in FIG.
- the light emitting module 106 is disposed on the back plate 108 with the wiring board 162 fitted in the recess 181 of the back plate 108.
- the surface of the wiring board 162 on the display panel 103 side and the mounting surface of the protruding portion 107 of the back plate 108 are substantially the same plane.
- the light emission sources 161 are arranged in a matrix with respect to the back plate 108.
- a sticking member 171 for sticking the reflection sheet 105 is attached to the back plate 108.
- the sticking member 171 is, for example, a belt-like double-sided tape. However, the sticking member 171 is not limited to a double-sided tape.
- the sticking member 171 may be any member that can stick the reflective sheet 105.
- the affixing member 171 is affixed to the back plate 108 in a state of extending over substantially the entire length of the back plate 108 (X-axis direction in the drawing). In this way, when the sticking member 171 is arranged along the longitudinal direction of the back plate 108, the back plate 108 and the reflection sheet 105 after the sticking are stretched or contracted by heat (hereinafter also referred to as "thermal stretch"). The possibility that the sticking member 171 and the reflection sheet 105 are peeled off from the back plate 108 can be reduced.
- the sticking member 171 is also provided in the vicinity of the light emitting source 161. Accordingly, it is possible to suppress the occurrence of a phenomenon in which the light-emitting source 161 is displaced or dropped from the wiring board 162 when the back plate 108 or the reflection sheet 105 after being attached is thermally expanded and contracted.
- the sticking member 171 is attached across the wiring board 162 and the back plate 108. Thereby, when the wiring board 162 is thermally expanded and contracted, the possibility that the sticking member 171 is peeled can be reduced.
- the sticking member 171 is also attached to the inclined portion 182 existing on the periphery of the back plate 108.
- the inclined portion 182 is a peripheral portion of the back plate 108 formed so as to approach the display panel 103 toward the peripheral edge. That is, the inclined portion 182 is a peripheral portion of the back plate 108 formed so that the opening area increases as the display panel 103 is approached.
- FIG. 8 is a cross-sectional view of back plate 108 to which reflection sheet 105 in Embodiment 1 is attached.
- FIG. 8 shows a state where the reflection sheet 105 is attached to the cross-sectional view shown in FIG.
- the reflection sheet 105 is attached to the wiring board 162 and the back plate 108 by the attaching member 171 in a state where the light emitting source 161 is inserted into the insertion hole 151.
- the protruding portion 107 protrudes to the display panel 103 side from the surface to which the sticking member 171 is attached, the reflective sheet 105 partially swells toward the display panel 103 due to its own elasticity. Put out. In this way, the bulging portion 153 is formed in the reflection sheet 105.
- the protrusion 107 is disposed between the light source 161 and the light source 161 along the longitudinal direction of the back plate 108. Therefore, in the present embodiment, the bulging portion 153 of the reflection sheet 105 extends along the longitudinal direction of the back plate 108 and bulges in a semi-cylindrical shape toward the display panel 103 side.
- the bulging portion 153 is not provided, a dark region may occur in the light emitted toward the display panel 103.
- the luminance of a dark region generated when the bulging portion 153 is not provided can be increased. it can.
- the luminance of light radiated to the display panel 103 can be substantially uniform in a state where the luminance is high.
- FIG. 9 is a cross-sectional view of back plate 108 to which reflective sheet 105 in Embodiment 1 is attached. 9 shows a part of a cross-sectional view taken along line IX-IX passing through the connector 163 in FIG. 6 (however, a cross-sectional view in a state where the reflection sheet 105 is attached).
- the connector 163 is covered by a tongue piece 154 formed by a cut portion 152 provided at a position corresponding to the connector 163 of the reflection sheet 105. .
- the electric wire 164 connected to the connector 163 is also covered with the tongue piece 154.
- the connector 163 and the electric wire 164 are exposed on the surface of the reflection sheet 105, a dark region may occur at a position where the connector 163 is attached in the light emitted toward the display panel 103.
- the brightness of a dark region generated at the position where the connector 163 is attached can be increased.
- the luminance of light radiated to the display panel 103 can be substantially uniform in a state where the luminance is high.
- a display device includes a display panel that displays an image, a plurality of light emission sources, a back plate to which the light emission sources are attached, and a reflection sheet.
- the plurality of light emitting sources emit light from the back side of the display panel toward the display panel, and are arranged in a matrix along the display panel.
- the reflection sheet is attached to the back plate, has an insertion hole into which the light source is inserted, and reflects light emitted from the light source.
- a backplate is provided with the some protrusion part which bulges a part of reflection sheet toward a display panel in the state in which the reflection sheet was attached.
- the display device 100 is an example of a display device.
- the display panel 103 is an example of a display panel.
- the light emission source 161 is an example of a light emission source.
- the back plate 108 is an example of a back plate.
- the reflection sheet 105 is an example of a reflection sheet.
- the insertion hole 151 is an example of an insertion hole.
- the protrusion 107 is an example of a protrusion.
- the bulging portion 153 due to the protruding portion 107 when the bulging portion 153 due to the protruding portion 107 is not formed on the reflection sheet 105, a dark region may occur in the light emitted toward the display panel 103.
- the bulging portion 153 since the bulging portion 153 is formed in the reflection sheet 105 by the protruding portion 107, it may be generated in the light radiated toward the display panel 103.
- the brightness of the area can be increased. Thereby, the brightness
- the back plate may further include a connector for supplying power to the light emitting source, and the reflection sheet may include a cut portion that forms a tongue piece that covers the connector. .
- the connector 163 is an example of a connector.
- the tongue piece 154 is an example of a tongue piece.
- the cut portion 152 is an example of a cut portion.
- the display device 100 when the connector 163 is not covered by the tongue piece 154, a dark region may occur at a position where the connector 163 is attached in the light emitted toward the display panel 103.
- the connector 163 is covered with the tongue piece 154 by providing the reflective sheet 105 with a cut portion.
- the display device 100 can increase the luminance of a dark region that may be generated at a position where the connector 163 is attached among the light emitted toward the display panel 103, and the light emitted to the display panel 103. Can be made substantially uniform with high brightness.
- the back plate may be provided with an inclined part that approaches the display panel toward the peripheral edge at the peripheral part, and the reflective sheet may be attached to the inclined part.
- the inclined portion 182 is an example of an inclined portion.
- the peripheral portion of the reflection sheet 105 is attached and fixed to the inclined portion 182, the shape of the reflection sheet 105 after attachment can be stabilized. It is possible to suppress variation in luminance of light emitted to the display panel 103.
- the back plate may further include a wiring board to which a plurality of light emitting sources are attached, and the reflective sheet may be attached to the wiring board in the vicinity of the light emitting sources.
- the wiring board 162 is an example of a wiring board.
- the light emitting sources 161 can be easily arranged on the back plate 108 in, for example, a matrix. Then, when the back plate 108 and the reflection sheet 105 are thermally expanded and contracted, it is possible to reduce the possibility that the light emission source 161 is displaced or dropped with respect to the wiring board 162.
- the attaching portion to which the reflective sheet and the wiring substrate are attached may be formed by extending in the longitudinal direction of the display panel.
- the pasting member 171 is an example of a pasting portion.
- the sticking member 171 is disposed along the longitudinal direction of the back plate 108.
- the back plate 108 and the reflection sheet 105 are thermally expanded and contracted, it is possible to reduce the possibility that the sticking member 171 and the reflection sheet 105 are peeled off from the back plate 108.
- the first embodiment has been described as an example of the technique disclosed in the present application.
- the technology in the present disclosure is not limited to this, and can also be applied to embodiments in which changes, replacements, additions, omissions, and the like are performed.
- the protruding portion 107 has been described as a separate member from the back plate 108. However, the protrusion 107 and the back plate 108 may be integrated.
- the sticking member 171 is not limited to a double-sided tape.
- the sticking member 171 may be a type of adhesive to be applied.
- the sticking direction of the sticking member 171 may be any direction.
- the sticking member 171 may be provided along the short side direction of the back plate 108.
- a mark indicating a position where the adhesive member 171 is provided on the wiring board 162 may be provided by screen printing or the like.
- the protruding portion 107 is not limited to one protruding linearly.
- the protruding portion 107 may protrude in a dot shape.
- the shape of the bulging portion 153 of the reflection sheet 105 may be a dome shape.
- the present disclosure is applicable to a display device that displays an image, characters, a moving image, or the like using a backlight.
- the present disclosure is applicable to electronic devices such as a television, a monitor display, digital signage, a portable terminal, a tablet terminal, or a table display device.
Abstract
Description
[1-1.表示装置の構成の概要]
図1は、実施の形態1における表示装置100の外観の一例を模式的に示す斜視図である。
発光ユニット140は、表示パネル103の背面に実質的に輝度が均一な光を放射するための部材であり、一般的に「バックライト」等と呼称される。発光ユニット140は、拡散板104と、反射シート105と、発光モジュール106と、を備えている。
図4は、実施の形態1における反射シート105の一例を模式的に示す斜視図である。図4には、背面板108に取り付ける前の反射シート105を示す。
図5は、実施の形態1における背面板108および突出部107の一例を模式的に示す斜視図である。
突出部107は、図5に示すように、背面板108に取り付けられる矩形棒状の部材である。突出部107は、背面板108に取り付けられることで、反射シート105の一部を表示パネル103側に向かって膨出させる。本実施の形態では、突出部107は、背面板108における反射シート105の取り付け面(配線基板162の表示パネル103側の表面とほぼ同じ高さの面)に、表示パネル103側に向かって突出するように貼り付けられる。突出部107は、発光源161の間(中央位置)に配置されており、発光モジュール106の延伸方向に沿って延伸している。
次に、反射シート105の貼り付け方法を説明する。
以上のように、本実施の形態において、表示装置は、画像を表示する表示パネルと、複数の発光源と、発光源が取り付けられる背面板と、反射シートと、を備える。複数の発光源は、表示パネルの背面側から表示パネルに向かって光を放射し、表示パネルに沿ってマトリクス状に配置される。反射シートは、背面板に取り付けられ、発光源が差し込まれる挿入孔を有し、発光源から放射された光を反射する。そして、背面板は、反射シートが取り付けられた状態で反射シートの一部を表示パネルに向かって膨出させる複数の突出部を備える。
以上のように、本出願において開示する技術の例示として、実施の形態1を説明した。しかしながら、本開示における技術は、これに限定されず、変更、置き換え、付加、省略等を行った実施の形態にも適用できる。また、上記実施の形態1で説明した各構成要素を組み合わせて、新たな実施の形態とすることも可能である。
101 枠体
102 前面部材
103 表示パネル
104 拡散板
105 反射シート
106 発光モジュール
107 突出部
108 背面板
109 背面カバー
140 発光ユニット
151 挿入孔
152 切り込み部
153 膨出部
154 舌片部
161 発光源
162 配線基板
163 コネクタ
164 電線
171 貼付部材
181 凹部
182 傾斜部
Claims (5)
- 画像を表示する表示パネルと、
前記表示パネルの背面側から表示パネルに向かって光を放射し、前記表示パネルに沿ってマトリクス状に配置される複数の発光源と、
前記発光源が取り付けられる背面板と、
前記背面板に取り付けられ、前記発光源が差し込まれる挿入孔を有し、前記発光源から放射された光を反射する反射シートと、を備え、
前記背面板は、前記反射シートが取り付けられた状態で前記反射シートの一部を前記表示パネルに向かって膨出させる複数の突出部を備える、
表示装置。 - 前記背面板は、
前記発光源に電力を供給するためのコネクタをさらに備え、
前記反射シートは、
前記コネクタを覆う舌片部を形成する切り込み部を備える、
請求項1に記載の表示装置。 - 前記背面板は、
周縁部に、周縁端に向かうほど前記表示パネルに近づく傾斜部を備え、
前記反射シートは、前記傾斜部に貼り付けられる、
請求項1に記載の表示装置。 - 前記背面板は、
複数の前記発光源が取り付けられる配線基板をさらに備え、
前記反射シートは、
前記発光源の近傍において前記配線基板に貼り付けられる、
請求項1に記載の表示装置。 - 前記反射シートと前記配線基板とが貼り付けられる貼り付け部は、前記表示パネルの長手方向に延伸して形成される、
請求項4に記載の表示装置。
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US15/542,937 US10317730B2 (en) | 2015-02-23 | 2016-02-02 | Display device having backlight with protrusions for causing reflection sheet to bulge up |
EP16754902.1A EP3263972B1 (en) | 2015-02-23 | 2016-02-02 | Display device |
JP2017501887A JP6589145B2 (ja) | 2015-02-23 | 2016-02-02 | 表示装置 |
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US (1) | US10317730B2 (ja) |
EP (1) | EP3263972B1 (ja) |
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WO (1) | WO2016136146A1 (ja) |
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EP3263972A4 (en) | 2018-03-28 |
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