WO2015159397A1 - 表示装置 - Google Patents
表示装置 Download PDFInfo
- Publication number
- WO2015159397A1 WO2015159397A1 PCT/JP2014/060859 JP2014060859W WO2015159397A1 WO 2015159397 A1 WO2015159397 A1 WO 2015159397A1 JP 2014060859 W JP2014060859 W JP 2014060859W WO 2015159397 A1 WO2015159397 A1 WO 2015159397A1
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- WIPO (PCT)
- Prior art keywords
- guide plate
- light guide
- heat
- plate
- light
- Prior art date
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Classifications
-
- 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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
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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
- G02F1/133615—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
- 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
- G02F1/133628—Illuminating devices with cooling means
Definitions
- the present invention relates to a display device that includes a light guide plate that emits light incident from a side surface from one surface, and that displays an image using light from the light guide plate.
- Patent Document 1 a recess that extends from the LED light source block to at least a part of the light guide plate / reflective sheet is provided at the end of the panel frame where the LED light source block is disposed.
- a reflective heat insulating member that extends from the end portion to at least a part of the light guide plate / reflective sheet and is fixed to the panel frame, the light extraction efficiency is improved and the deterioration of the optical member is suppressed.
- a liquid crystal display device having good optical characteristics is disclosed.
- Patent Document 2 a plate-type heat radiating portion having a pipe portion, an LED light source disposed at a side end of the plate-type heat radiating portion, and receiving heat in contact with the LED light source,
- a backlight unit for a liquid crystal display device having a heat receiving portion to be connected and having excellent heat dissipation.
- the liquid crystal display device disclosed in Patent Document 1 does not consider such suppression of heat generation or heat dissipation, and cannot respond.
- Cited Document 2 a plate-type heat radiating section is provided to radiate heat from the LED light source, but this is a complicated configuration that requires a pipe section, a heat receiving section, etc., increasing the production cost of the apparatus. And productivity is inferior.
- the present invention has been made in view of such circumstances, and an object of the present invention is to provide a light guide plate that emits light incident from the side surface from one surface, and to display an image with the light from the light guide plate.
- an object of the present invention is to provide a light guide plate that emits light incident from the side surface from one surface, and to display an image with the light from the light guide plate.
- the display device to be performed by providing a heat absorption plate that is integrally molded with the light guide plate, one surface is in contact with the other surface of the light guide plate, and absorbs heat from the light guide plate, excellent heat dissipation can be achieved with a simpler structure.
- An object of the present invention is to provide a display device that can be demonstrated and that can increase the productivity by reducing the number of parts.
- a display device includes a light guide plate that emits light incident from a side surface from one surface, and in the display device that displays an image with light from the light guide plate, the display device is integrally molded with the light guide plate.
- a heat absorbing plate is provided in contact with the other surface of the light guide plate and absorbs heat from the light guide plate.
- the heat absorbing plate is integrally formed with the light guide plate, the number of parts can be reduced.
- the heat absorbing plate absorbs heat generated by the light guide plate from the other surface of the light guide plate.
- the display device according to the present invention is characterized in that the endothermic plate has a cavity, and a coolant is injected into the cavity.
- the heat absorbed from the other surface of the light guide plate by the heat absorbing plate is cooled by the coolant in the cavity. Accordingly, the heat generated by the light guide plate can be radiated efficiently.
- the display device according to the present invention is characterized in that the heat absorbing plate has irregularities on the other surface.
- the other surface of the endothermic plate since the other surface of the endothermic plate has irregularities, the specific surface area on the other surface increases and heat can be radiated more effectively. Further, the strength on the other surface is increased, and deformation of the heat absorbing plate is prevented.
- the display device according to the present invention is characterized in that one surface of the heat absorbing plate is white.
- one surface of the heat absorbing plate in contact with the other surface of the light guide plate is white, and light emitted through the other surface of the light guide plate is reflected toward one surface of the light guide plate.
- the brightness in image display can be increased.
- the display device includes a heat radiating plate in contact with the other surface of the heat absorbing plate.
- the heat absorbed from the other surface of the light guide plate by the heat absorbing plate is cooled by the coolant injected into the cavity, and is conducted to the heat radiating plate in the air. Heat is dissipated.
- the display device includes an optical sheet provided on one surface side of the light guide plate, and an interval holding unit that is provided on an edge of the one surface of the light guide plate and holds an interval between the light guide plate and the optical sheet.
- the interval holding part has a cavity.
- the gap holding portion since the gap holding portion has a cavity inside, it can be deformed to some extent. For example, even when an impact is applied from the outside, the light guide plate and the optical sheet are absorbed. Hold the interval.
- the display device includes a display panel that displays an image using light incident through the optical sheet, and the interval holding unit is configured to maintain an interval between the optical sheet and the display panel. It is characterized by.
- the interval holding unit is configured to maintain not only the interval between the light guide plate and the optical sheet but also the interval between the optical sheet and the display panel, the number of components is further reduced. Can do.
- the display device is characterized in that the interval holding portion, the light guide plate, and the heat absorption plate are integrally formed.
- the interval holding part, the light guide plate, and the heat absorbing plate are integrally molded, the number of parts is reduced, the assembly process is simplified, and the productivity is increased.
- the display device includes a light source provided in the vicinity of one side surface of the light guide plate, and the convex portion of the heat absorbing plate is provided at an edge portion on one side surface of the light guide plate.
- the convex portion of the endothermic plate is provided at an edge portion on one side surface of the light guide plate in the vicinity of the light source, and heat is conducted from the light source that causes heat generation of the light guide plate. If so, it absorbs such heat before it is diffused throughout the light guide plate.
- the light source includes a light emitting element and a substrate on which the light emitting element is mounted on one surface, and a hollow heat absorbing portion that absorbs heat of the substrate on the other surface side of the substrate.
- the heat absorption part is integrally formed with the heat absorption plate.
- heat generated from the light emitting element is absorbed by the heat absorbing portion on the other surface side of the substrate through the substrate, and the absorbed heat is transmitted through the heat absorbing plate. To dissipate heat.
- one surface is in contact with the other surface of the light guide plate, and the heat absorbing plate that absorbs heat from the light guide plate is integrally formed with the light guide plate, so that the heat dissipation is excellent with a simpler structure. And increase the productivity by reducing the number of parts.
- FIG. 1 is a front view showing an appearance of a television receiver according to Embodiment 1 of the present invention.
- FIG. 2 is a longitudinal sectional view taken along line AA in FIG. It is the enlarged view to which a part of FIG. 2 was expanded. It is explanatory drawing explaining arrangement
- FIG. 5 is a partial cross-sectional view taken along line BB in FIG. 4.
- the television receiver which concerns on Embodiment 1 of this invention it is an illustration figure which shows the space
- FIG. 1 is a front view showing an external appearance of a television receiver according to Embodiment 1 of the present invention.
- Reference numeral 100 in the figure indicates a television receiver according to Embodiment 1 of the present invention.
- the horizontal direction in the drawing is referred to as a horizontal direction
- the vertical direction in the drawing is referred to as a vertical direction.
- FIG. 2 is a longitudinal sectional view taken along line AA in FIG.
- the television receiver 100 according to Embodiment 1 of the present invention includes a rectangular liquid crystal display panel 2 that displays an image on one surface of the front side.
- a light source device 1 for irradiating the liquid crystal display panel 2 with light is disposed on the back side of the liquid crystal display panel 2.
- the light source device 1 includes a light source unit 3, an optical sheet 4, a light guide plate 5, and a heat absorption plate 6.
- FIG. 3 is an enlarged view of a part of FIG.
- the optical sheet 4 is arranged so that one surface thereof faces the other surface of the liquid crystal display panel 2, the light guide plate 5 is arranged so that one surface faces the other surface of the optical sheet 4, and the heat absorbing plate 6 further includes It arrange
- a front cover 7 is disposed on the edge side of the liquid crystal display panel 2.
- the front cover 7 has a hollow rectangular display window 71 that follows the shape of one surface of the liquid crystal display panel 2 visually recognized by the user. The user can visually recognize an image displayed on the one surface of the liquid crystal display panel 2 through the display window 71.
- the liquid crystal display panel 2 is covered with a display window 71 at a peripheral portion of the one surface. More specifically, the liquid crystal display panel 2 presses the peripheral edge of the liquid crystal display panel 2 against the interval holding portion 8 described later via the cushion C provided along the peripheral edge of the one surface of the liquid crystal display panel 2, thereby liquid crystal. The display panel 2 is held.
- the liquid crystal display panel 2 is provided with a polarizing plate (not shown) on the other surface, and light incident using the polarizing plate is converted into a P wave (horizontal deflection component) and an S wave (vertical deflection component). The P wave is separated, and only the P wave goes out to one side, and the S wave is absorbed by the polarizing plate.
- the liquid crystal display panel 2 may be an electrophoretic liquid crystal panel, for example.
- the optical sheet 4 which is emitted from the light source unit 3, diffuses and collects light incident on the light guide plate 5 and emits more uniform light toward the liquid crystal display panel 2.
- the optical sheet 4 includes two diffusion sheets and one prism sheet, and the prism sheet is interposed between the two diffusion sheets.
- One diffusion sheet disposed on the light guide plate 5 side of the two diffusion sheets is an optical sheet that diffuses light incident from the light source unit 3 through the light guide plate 5 and enters the prism sheet.
- the prism sheet is an optical sheet that collects light incident through the one diffusion sheet and emits the light toward another diffusion sheet. The light that has passed through the prism sheet is incident on the other diffusion sheet perpendicular to the prism sheet.
- the other diffusion sheet disposed on the liquid crystal display panel 2 side further diffuses the light incident through the prism sheet to obtain a more uniform luminance distribution.
- the optical sheet is emitted toward
- a rectangular light guide plate 5 is arranged on the other surface side of the optical sheet 4.
- the light guide plate 5 guides light emitted from the light source unit 3 to the optical sheet 4 (liquid crystal display panel 2).
- the light guide plate 5 is configured to have, on one surface facing the other surface of the optical sheet 4, an output surface on which a pattern is formed so that light incident from the light source unit 3 travels in the direction of the liquid crystal display panel 2. May be. Accordingly, the light guide plate 5 can uniformly transmit the light incident from the light source unit 3 to the optical sheet 4 through the emission surface by changing the light into flat light.
- the light guide plate 5 is made of, for example, highly transparent acrylic resin, and the heat absorbing plate 6 is disposed on the other surface of the light guide plate 5 so that the one surface 61 is in contact with the other surface.
- the heat-absorbing plate 6 is made of, for example, plastic, and one surface 61 has a shape and size substantially equal to that of the light guide plate 5, and the one surface 61 is white with good reflectivity. Accordingly, it has a function of reflecting light that enters the light guide plate 5 from the light source unit 3 and is emitted from the other surface of the light guide plate 5, and returns the light to the light exit surface side of the light guide plate 5. Further, the color of the first surface 61 is not limited to white, but may be an achromatic color that can achieve the purpose of reflecting light emitted from the other surface of the light guide plate 5.
- the heat absorbing plate 6 is formed so that the other surface is uneven. Since the other surface of the heat absorbing plate 6 is uneven as described above, the strength is increased, and it can be interposed between the light guide plate 5 and a heat radiating plate 9 described later to serve as a spacer. In other words, by configuring the other surface of the heat absorbing plate 6 to be uneven, a so-called backlight chassis that supports the other surface of the heat absorbing plate 6 can be omitted.
- convex portions 64, 64,... 64 and concave portions 63, 63,... 63 are formed, and the convex portion 64 has a cavity 65 inside. Therefore, since the convex portion 64 (the concave portion 63) can be deformed within a predetermined range, the spacer can maintain a predetermined distance from the light guide plate 5 as a spacer without being related to the surface shape of the heat sink 9.
- a cooling liquid 66 is injected into the cavity 65 of the convex portion 64. Therefore, the heat generated by the light guide plate 5 is cooled by the cooling liquid 66 of the convex portion 64 via the one surface 61 of the heat absorbing plate 6, thereby preventing the light guide plate 5 (or the light source device 1) from being overheated in advance. it can.
- two heat radiating plates 9 are arranged so that one surface thereof is in contact with the other surface of the heat absorbing plate 6.
- the heat sink 9 is made of aluminum having excellent thermal conductivity, for example. That is, the convex portion 64 on the other surface side of the heat absorbing plate 6 is in contact with one surface of the heat radiating plate 9.
- FIG. 4 is an explanatory diagram for explaining the arrangement of the heat sink 9 in the television receiver 100 according to Embodiment 1 of the present invention.
- FIG. 5 is a partial sectional view taken along line BB in FIG.
- the heat radiating plate 9 has a strip shape, and the longitudinal dimension is substantially equal to the longitudinal dimension of the light guide plate 5 or the heat absorbing plate 6. Further, the heat sink 9 is provided along both edge portions on the long side of the light guide plate 5 or the heat absorber 6. Furthermore, the heat sink 9 has a bent portion 91 provided along the other surface on the other surface side of the substrate 32 of the light source unit 3 to be described later. In other words, the heat sink 9 is bent at the light source section 3 end in the thickness direction of the heat sink 9.
- Such a heat radiating plate 9 radiates heat generated by the light guide plate 5 conducted through the heat absorbing plate 6 into the air. That is, the heat generated by the light guide plate 5 (light source unit 3) is cooled to the cooling liquid 66 of the convex portion 64 via the one surface 61 of the heat absorbing plate 6, and is conducted to the heat radiating plate 9 by the cooling liquid 66. Furthermore, the heat conducted from the convex portion 64 (coolant 66) to the heat radiating plate 9 is thermally diffused throughout the heat radiating plate 9, and is radiated from the entire other surface of the heat radiating plate 9 into the air.
- the heat generated by the light guide plate 5 (light source unit 3) can be effectively cooled. That is, since the cooling liquid 66 is injected into the cavity 65 of the convex portion 64, the amount of heat absorbed from the light guide plate 5 is larger than when the cooling liquid 66 is not injected into the cavity 65.
- cooling liquid 66 is a liquid, heat conduction to the heat radiating plate 9 is facilitated as compared with the case where the cooling liquid 66 is not injected into the cavity 65.
- the heat of the light source unit 3 (substrate 32) is diffused to the entire heat sink 9 via the bent portion 91 and radiated from the entire other surface of the heat sink 9 into the air, the light source unit 3 directly It is also possible to dissipate the heat generated.
- the VESA standard fittings V and V can be further attached to the other surface of the heat radiating plate 9 or the heat absorbing plate 6 (recess 63). is there.
- the television receiver 100 includes the interval holding unit 8 that holds the liquid crystal display panel 2, the optical sheet 4, and the light guide plate 5 at predetermined intervals.
- the interval holding unit 8 is provided along an edge on the long side of the liquid crystal display panel 2, the optical sheet 4, and the light guide plate 5. As shown in FIGS. 2 and 3, the interval holding unit 8 has a crank shape in a longitudinal section, and has two bent portions.
- the interval holding unit 8 includes two plane portions 81 and 82 that are parallel to the liquid crystal display panel 2, the optical sheet 4, or the light guide plate 5, and one end portion related to the crank shape is the optical sheet 4 and the light guide. It is interposed between the optical plates 5.
- One flat surface portion 81 is formed at the other end portion of the crank shape of the interval holding portion 8, and the other flat surface portion 82 is formed between the one end portion and the other end portion of the crank shape.
- the crank-shaped one end and the crank-shaped other end are simply referred to as one end and the other end.
- the edge portion of the optical sheet 4 is placed on the plane portion 82, and, as described above, one end portion of the interval holding portion 8 is interposed between the optical sheet 4 and the light guide plate 5, so that the optical sheet 4 The light guide plate 5 is held while maintaining a constant interval.
- the edge of the liquid crystal display panel 2 is placed on the flat surface portion 81. Thereby, the liquid crystal display panel 2 and the optical sheet 4 are held while maintaining a constant interval.
- the interval holding unit 8 has a cavity 83 inside.
- maintenance part 8 has the cavity 83, a deformation
- maintenance part 8 has white. Therefore, the light from the light guide plate 5 and the optical sheet 4 is reflected. That is, when the light from the light guide plate 5 and the optical sheet 4 is reflected by the interval holding unit 8, it is possible to prevent local uneven brightness from occurring at these edges.
- FIG. 6 is an exemplary diagram showing the interval holding unit 8, the light guide plate 5, and the heat absorption plate 6 that are integrally molded in the television receiver 100 according to Embodiment 1 of the present invention.
- the interval holding unit 8, the light guide plate 5, and the heat absorbing plate 6 are integrally molded, and these are molded by, for example, a gas assist molding method.
- a gas assist molding method is a known technique for forming a cavity in a product by injecting a gas during injection molding, and detailed description thereof is omitted here.
- a so-called two-color molding method is further used for the integral molding of the interval holding unit 8, the light guide plate 5 and the heat absorbing plate 6.
- Such a two-color molding method is a known technique capable of obtaining a product having a plurality of colors by sequentially performing injection using a plurality of nozzles at the time of injection molding, and detailed description thereof is omitted here. .
- the television receiver 100 by using the two-color type method, as described above, only one surface of the heat absorbing plate 6 and the interval holding unit 8 can be white. Further, by using the two-color mold method, it is also possible to prepare in advance BOSS for attaching the metal fittings V, V to the other surface of the heat radiating plate 9 or the heat absorbing plate 6 (recess 63).
- the interval holding unit 8, the light guide plate 5, and the heat absorbing plate 6 are integrally molded. Furthermore, as described above, the backlight chassis can be omitted. Therefore, the assembly of the product becomes easy, the manufacturing process is simplified, and the productivity of the product can be increased.
- a leg plate 84 extending from the light guide plate 5 in the direction of the heat absorbing plate 6 is provided at the other end of the interval holding unit 8.
- the leg 84 is fitted to the outside of the heat sink 9 (bent portion 91), so that the heat sink 9 is attached to the integrated unit of the interval holding unit 8, the light guide plate 5, and the heat absorbing plate 6.
- the light source unit 3 is provided near one side surface of the light guide plate 5 in the vertical direction.
- the light source unit 3 includes a strip-shaped substrate 32 disposed to face the one side surface of the light guide plate 5 and a plurality of light sources 31, 31,... Mounted on one surface of the substrate 32 along the longitudinal direction of the substrate 32. ..31.
- the light source 31 includes, for example, a cold cathode fluorescent lamp (CCFL: Cold Cathode Fluorescence Lamp), an external electrode fluorescent lamp (EEFL: External Electrode Fluorescent Lamp), a hot cathode tube (HCFL: Hot Cathode Fluorescent LED). Emitting (Diode) etc.
- CCFL Cold Cathode Fluorescence Lamp
- EFL External Electrode Fluorescent Lamp
- HCFL Hot Cathode Fluorescent LED.
- FIG. 7 is a partial vertical cross-sectional view showing the main configuration of the television receiver 100 according to Embodiment 2 of the present invention.
- the convex portion 64 is formed on the other surface of the heat absorbing plate 6.
- the convex portion 64 is the other surface of the heat absorbing plate 6 and is formed at the edge on the long side of the heat absorbing plate 6 that is rectangular. More specifically, the convex portion 64 is formed only at the edge portion of the heat absorbing plate 6 near the light source portion 3.
- a portion other than the convex portion 64 is a flat surface 67 that comes into contact with the backlight chassis 10 described later. The flat surface 67 is supported by the backlight chassis 10.
- the convex portion 64 has a hollow 65 inside, as in the first embodiment.
- the cooling liquid 66 may be injected into the cavity 65 of the convex portion 64.
- the convex portion 64 is formed only at the edge of the heat absorbing plate 6 near the light source unit 3, the light source unit 3 and the light guide plate are more effectively used.
- the heat from 5 can be absorbed.
- the heat generated by the light guide plate 5 originates from the heat generated by the light source unit 3
- the heat generated by the light source unit 3 can be reduced by having the configuration in which the convex portions 64 are formed in the vicinity of the light source unit 3.
- the light can be absorbed directly from the portion 3 and is indirectly absorbed from the edge of the heat absorbing plate 6 in the vicinity of the light source portion 3 before heat is diffused throughout the light guide plate 5. Therefore, the light guide plate 5 (or the light source device 1) can be prevented from being overheated more efficiently.
- FIG. 8 is a partial vertical cross-sectional view showing the main configuration of the television receiver 100 according to Embodiment 3 of the present invention.
- the television receiver 100 according to Embodiment 3 of the present invention has a configuration in which the interval holding portion 8 is provided as a separate member, and the convex portion 64, the concave portion 63, and the heat sink 9 are omitted.
- the heat absorbing plate 6 in the television receiver 100 according to Embodiment 3 of the present invention does not have the convex portion 64 and the concave portion 63 and has a cavity 69 inside.
- the cavity 69 is divided into a plurality of regions.
- the other surface of the heat absorbing plate 6 is flat and is configured to be in contact with air.
- a cooling liquid 66 may be injected into the cavity 69.
- the heat absorbing plate 6 radiates heat generated by the light guide plate 5 (light source unit 3) into the air. That is, the heat generated by the light guide plate 5 (light source unit 3) is absorbed by the cavity 69 through the one surface of the heat absorbing plate 6 and cooled by the cooling liquid 66. Further, the heat absorbed by the cavity 69 is radiated from the other surface of the heat absorbing plate 6 into the air. That is, despite the configuration in which the heat radiating plate is omitted, the heat generated by the light guide plate 5 can be effectively radiated, the number of components can be reduced, and the device can be made compact.
- the heat absorbing plate 6 has a bent portion 68 bent in the thickness direction of the heat absorbing plate 6 at the end on the light source unit 3 side.
- the bent portion 68 heat absorbing portion
- a configuration may be adopted in which a cavity 69 is formed inside the bent portion 68 and a cooling liquid 66 is injected into the cavity 69.
- the heat of the light source unit 3 (substrate 32) is diffused to the entire heat absorbing plate 6 through the bent portion 68 (cooling liquid 66), and is radiated from the entire other surface of the heat absorbing plate 6 into the air. It is also possible to dissipate heat generated by the light source unit 3.
- the interval holding unit 8, the light guide plate 5, and the heat absorbing plate 6 are integrally molded, and it has been described that these integral moldings are performed by a gas assist molding method and a two-color molding method.
- the present invention is not limited to this. Only the light guide plate 5 may be prepared in advance, set in a mold, and may be integrally molded by so-called insert molding.
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Abstract
Description
図1は本発明の実施の形態1に係るテレビジョン受像機の外観を示す正面図である。図中符号100は、本発明の実施の形態1に係るテレビジョン受像機を示す。以下、説明の便宜上、図面視左右方向を横方向、図面視上下方向を縦方向という。
実施の形態1においては、吸熱板6が導光板5と略等しい形状及び大きさを有し、凸部64及び凹部63が、吸熱板6の他面に全体的に形成されている場合について説明したが、本発明はこれに限るものでない。
実施の形態1においては、吸熱板6が導光板5と略等しい形状及び大きさを有し、凸部64及び凹部63が、吸熱板6の他面に全体的に形成されている場合について説明したが、本発明はこれに限るものでない。
3 光源部(光源)
4 光学シート
5 導光板
6 吸熱板
8 間隔保持部
9 放熱板
31 光源
32 基板
61 一面
63 凹部
64 凸部
65 空洞
66 冷却液
68 突出部(吸熱部)
83 空洞
100 テレビジョン受像機
Claims (10)
- 側面から入射される光を一面から出射させる導光板を備え、該導光板からの光にて画像表示を行う表示装置において、
前記導光板と一体成型され、一面が該導光板の他面と接し、該導光板から熱を吸収する吸熱板を備えることを特徴とする表示装置。 - 前記吸熱板は空洞を有し、
該空洞内には冷却液が注入されていることを特徴とする請求項1に記載の表示装置。 - 前記吸熱板は他面に凸凹を有することを特徴とする請求項1又は2に記載の表示装置。
- 前記吸熱板の一面は白色であることを特徴する請求項1から3の何れかに記載の表示装置。
- 前記吸熱板の他面と接する放熱板を備えることを特徴とする請求項1から4の何れかに記載の表示装置。
- 前記導光板の一面側に設けられた光学シートと、
前記導光板の一面の縁部に設けられ、該導光板及び前記光学シートの間隔を保持する間隔保持部とを備え、
該間隔保持部は空洞を有することを特徴とする請求項1から5の何れかに記載の表示装置。 - 前記光学シートを介して入射される光を用いて画像を表示する表示パネルを備え、
前記間隔保持部は、前記光学シート及び表示パネルの間隔を保つように構成されていることを特徴とする請求項6に記載の表示装置。 - 前記間隔保持部、導光板、及び吸熱板は一体成型されていることを特徴とする請求項6又は7に記載の表示装置。
- 前記導光板の一側面の付近に設けられた光源を備え、
前記吸熱板の凸部は、前記導光板の一側面に係る縁部に設けられていることを特徴とする請求項1から8の何れかに記載の表示装置。 - 前記光源は、発光素子と、該発光素子を一面に実装した基板とを有しており、
前記基板の他面側に該基板の熱を吸収する中空の吸熱部を備え、
該吸熱部は前記吸熱板と一体成型されていることを特徴とする請求項9に記載の表示装置。
Priority Applications (4)
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US15/126,256 US10451794B2 (en) | 2014-04-16 | 2014-04-16 | Display apparatus |
JP2016513574A JP6259512B2 (ja) | 2014-04-16 | 2014-04-16 | 表示装置 |
CN201480077166.1A CN106104369A (zh) | 2014-04-16 | 2014-04-16 | 显示装置 |
PCT/JP2014/060859 WO2015159397A1 (ja) | 2014-04-16 | 2014-04-16 | 表示装置 |
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PCT/JP2014/060859 WO2015159397A1 (ja) | 2014-04-16 | 2014-04-16 | 表示装置 |
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WO2015159397A1 true WO2015159397A1 (ja) | 2015-10-22 |
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US (1) | US10451794B2 (ja) |
JP (1) | JP6259512B2 (ja) |
CN (1) | CN106104369A (ja) |
WO (1) | WO2015159397A1 (ja) |
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CN106707584B (zh) * | 2016-12-29 | 2023-05-09 | 上海启钧电子有限公司 | 用于显示单元的多功能通道 |
KR20200139379A (ko) | 2019-06-04 | 2020-12-14 | 삼성전자주식회사 | 디스플레이 장치 |
CN115774352A (zh) * | 2021-09-06 | 2023-03-10 | 苏州佳世达电通有限公司 | 显示装置 |
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- 2014-04-16 JP JP2016513574A patent/JP6259512B2/ja not_active Expired - Fee Related
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US20170090109A1 (en) | 2017-03-30 |
JPWO2015159397A1 (ja) | 2017-04-13 |
JP6259512B2 (ja) | 2018-01-10 |
US10451794B2 (en) | 2019-10-22 |
CN106104369A (zh) | 2016-11-09 |
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