WO2012063917A1 - Dispositif d'éclairage et dispositif d'affichage à cristaux liquides le comprenant - Google Patents

Dispositif d'éclairage et dispositif d'affichage à cristaux liquides le comprenant Download PDF

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Publication number
WO2012063917A1
WO2012063917A1 PCT/JP2011/075989 JP2011075989W WO2012063917A1 WO 2012063917 A1 WO2012063917 A1 WO 2012063917A1 JP 2011075989 W JP2011075989 W JP 2011075989W WO 2012063917 A1 WO2012063917 A1 WO 2012063917A1
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WO
WIPO (PCT)
Prior art keywords
guide plate
light guide
light
chassis
frame
Prior art date
Application number
PCT/JP2011/075989
Other languages
English (en)
Japanese (ja)
Inventor
弘樹 深井
小倉　健
茂賀 岡崎
東　洋喜
一喜 中道
祐輔 三宅
沙織 南保
Original Assignee
シャープ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2012063917A1 publication Critical patent/WO2012063917A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—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
    • G02B6/0081—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
    • 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

Definitions

  • the present invention relates to an illumination device disposed on the back surface of a liquid crystal display panel and a liquid crystal display device including the illumination device.
  • a general liquid crystal display device includes a liquid crystal display panel and a lighting device disposed on the back side of the liquid crystal display panel so as to irradiate light.
  • a sidelight including a plate-like light guide plate made of a transparent material such as acrylic resin and a light source made up of LEDs (light emitting diodes) arranged along one side or a plurality of sides of the light guide plate
  • LEDs light emitting diodes
  • a type (edge light type) is known.
  • Such a sidelight type illuminating device has advantages such as being easily reduced in thickness as compared to a direct illuminating device in which a light source is disposed on the back surface of a liquid crystal display panel.
  • FIGS. 4 and 5 are an exploded perspective view and a cross-sectional view of the main part showing a schematic configuration of a liquid crystal display device including a sidelight type illumination device using such an LED.
  • the liquid crystal display device 100 includes a bezel 102, a liquid crystal display panel 103, and a lighting device 104.
  • the bezel 102 has a frame shape that covers the periphery of the liquid crystal display panel 103, and ensures the strength of the entire liquid crystal display device 100 together with the chassis 114.
  • the liquid crystal display panel 103 is formed by bonding two pieces of glass and sealing the liquid crystal therebetween, so that an image can be displayed on the front surface.
  • the illuminating device 104 includes a chassis 114 having a shallow box shape. Inside the chassis 114, optical sheets 107 to 109, a light guide plate 111, a first reflecting sheet 110, and a plurality of LEDs 121 are mounted.
  • the LED board 120 can be stored.
  • the light guide plate 111 includes a light incident surface 111 a for introducing light from the LEDs 121 included in the LED substrate 120, and the light introduced from the light incident surface 111 a upward (irradiation direction). And a light emitting surface 111b for emitting the light.
  • the light incident surface 111 a is configured by a predetermined side end surface of the light guide plate 111
  • the light emitting surface 111 b is configured by the front surface of the light guide plate 111.
  • the first reflection sheet 110 is disposed so as to cover the back surface 111c of the light guide plate 111 opposite to the light emitting surface 111b.
  • the optical sheets 107 to 109 include a diffusion sheet, a lens sheet, and the like, and are disposed on the light emitting surface 111b of the light guide plate 111.
  • the optical sheets 107 to 109, the light guide plate 111, and the first reflection sheet 110 are fixed in a stacked state on the bottom plate portion 114a of the chassis 114 by the frame 105.
  • the plurality of LEDs 121 provided on the LED substrate 120 are arranged in the vicinity of the light incident surface 111 a of the light guide plate 111. Further, the light emitting surface 121a of the LED 121 is arranged at a predetermined interval along the light incident surface 111a so as to face the light incident surface 111a of the light guide plate 111.
  • the LED board 120 is erected vertically with respect to the bottom plate portion 114a by a support member (L-shaped mounting (mounting) mounting bracket) 115 provided on the bottom plate portion 114a in the vicinity of the side wall portion 114b of the chassis 114. Is held to be.
  • the bottom plate portion 114a of the chassis 114 is provided with a convex portion 114d protruding downward, and the support member 115 is fixed to the convex portion 114d.
  • a band-shaped second reflection sheet 116 having an adhesive layer on one side is adhered (attached) to the upper surface of the convex portion 114d.
  • the second reflection sheet 116 is disposed so as to fill a gap between the first reflection sheet 110 and the LED 121, and is configured to reflect light from the LED 121.
  • a strip-shaped third reflection sheet 117 having an adhesive layer on one side is bonded (attached) to the lower surface 105c of the frame 105.
  • the third reflection sheet 117 has a function of reflecting light from the LED 121 and is in contact with the upper surface of the end portion of the light guide plate 111 to hold the light guide plate 111 with the bottom plate portion 114 a of the chassis 114. It also has a function as a part.
  • the following patent document is mentioned as a prior art document relevant to this invention.
  • thermal contraction occurs due to thermal expansion of a member formed by the temperature increase due to the lighting of the LED 121, or temperature decrease due to the LED 121 being turned off.
  • thermal expansion and contraction due to differences in linear expansion coefficients and volumes between the light guide plate 111 and the frame 105, the third reflection sheet 117 provided on the lower surface 105c of the frame 105, and the third
  • rubbing occurs with the light guide plate 111 against which the reflection sheet 117 is abutted, and this generates an abnormal sound (smearing sound) N such as “pick” as shown in FIG. .
  • An object of the present invention is to provide an illumination device that suppresses the generation of abnormal noise due to friction with a reflection sheet provided on the lower surface of a frame, and a liquid crystal display device including the same.
  • a lighting device includes a chassis having a box shape with an upper surface opened, a light guide plate having a plate shape accommodated in the chassis, and an outer peripheral end portion of the light guide plate.
  • a frame having a frame shape extending on the upper side of the chassis, and a light source for irradiating light to a predetermined side end surface of the light guide plate.
  • a reflection sheet having a function as a pressing portion for sandwiching the light plate between the chassis and a function of reflecting light is adhered, and a low surface is provided between the lower surface of the reflection sheet and the light guide plate.
  • the gist is that a friction member is interposed.
  • a low-friction member is bonded between the lower surface of the reflection sheet and the light guide plate, which is bonded to the lower surface of the frame and holds the light guide plate with the chassis. Therefore, even if members with different linear expansion coefficients are used in the light guide plate and the frame, they slide smoothly with each other due to the low friction member. Even if the thermal shrinkage caused by the temperature drop due to the occurrence of the noise, the generation of abnormal noise (stagnation sound) caused by friction between the light guide plate and the reflection sheet is suppressed.
  • the low friction member is preferably a transparent sheet adhered to the lower surface of the reflective sheet.
  • a transparent sheet having an adhesive layer on one side is adhered to the lower surface of the reflective sheet adhered to the lower surface of the frame, and the frame is attached to the chassis in which the light guide plate is accommodated.
  • the low friction member is preferably a transparent resin film coated on the lower surface of the reflective sheet. According to such a configuration, by simply attaching the reflection sheet whose lower surface is coated with a transparent resin film to the lower surface of the frame, and mounting the frame to the chassis containing the light guide plate, A transparent resin film (low friction member) can be easily interposed between the lower surface of the reflection sheet and the light guide plate. Moreover, since it is a transparent resin film, it is prevented that the light reflection characteristic of the lower surface of a reflection sheet is affected.
  • the low friction member is made of a lubricating grease applied to the lower surface of the reflection sheet.
  • the lubricating grease is applied to the lower surface of the reflection sheet bonded to the lower surface of the frame, and the frame is simply attached to the chassis containing the light guide plate.
  • Lubricating grease (low friction member) can be interposed between the lower surface of the reflection sheet and the light guide plate.
  • the lubricating grease may be white.
  • the liquid crystal display device which concerns on this invention makes it a summary to provide such an illuminating device and the liquid crystal display panel which performs a display using the light from the illuminating device. Is. According to such a liquid crystal display device, since the generation of abnormal noise is suppressed during or after use of the illumination device, the quality of the liquid crystal display device can be improved.
  • the low friction member is interposed between the light guide plate and the reflection sheet of the frame in contact with the light guide plate, it is possible to suppress the generation of noise due to friction between the two.
  • FIG. 1 is an exploded perspective view schematically showing a schematic configuration of a liquid crystal display device according to an embodiment of the present invention. It is sectional drawing which expanded and showed the principal part after the assembly of the liquid crystal display device of FIG. (A) is the figure which showed the state which affixes a transparent sheet to the reflection sheet provided in the lower surface of the flame
  • FIG. 1 is an exploded perspective view schematically showing a liquid crystal display device according to this embodiment.
  • the liquid crystal display device 1 includes a liquid crystal display panel 3 and an illumination device (backlight device) 4 for irradiating the liquid crystal display panel 3 with light, and these are integrally held by a bezel 2 or the like. It has become.
  • the bezel 2 has a frame shape that covers the periphery of the liquid crystal display panel 3, and ensures the strength of the entire liquid crystal display device 1 together with the chassis 14 included in the illumination device 4.
  • the liquid crystal display panel 3 has a horizontally long rectangular shape when viewed from above.
  • a pair of glass substrates comprising a thin film transistor (TFT) array substrate and a color filter (CF) substrate are bonded together in parallel at a predetermined interval, and a liquid crystal is sandwiched between the glass substrates. It has a sealed configuration.
  • TFT thin film transistor
  • CF color filter
  • a plurality of TFTs and pixel electrodes are formed in a matrix on the TFT array substrate, and a plurality of colored patterns are formed in a matrix on the CF substrate, and a common electrode is formed on almost the entire surface.
  • An image can be displayed by controlling the orientation of the liquid crystal by changing the voltage applied between the first electrode and the common electrode.
  • a polarizing plate is disposed on each of the front and back surfaces of the liquid crystal display panel 3.
  • the illumination device 4 is a so-called side light type (edge light type) illumination device.
  • the illumination device 4 includes a substantially box-shaped chassis 14 having an opening opened toward the liquid crystal display panel 3 side, and optical sheets 7 to 9 arranged so as to cover the opening of the chassis 14. Is provided. Further, inside the chassis 14, an LED substrate 20 on which a plurality of LEDs (light emitting diodes) 21 that are light sources are mounted, a light guide plate 11 that guides light from the LEDs 21 to the liquid crystal display panel 3 side, and the light guide plate 11.
  • arranged to the back side is provided.
  • the frame 5 is for fixing the optical sheets 7 to 9, the light guide plate 11, and the first reflection sheet 10 to the chassis 14 in a state where they are laminated in this order from above.
  • the frame 5 is formed in a frame shape (frame shape) extending along the outer peripheral end portion of the light guide plate 11, and the outer peripheral end portions of the optical sheets 7 to 9 and the light guide plate 11 extend over substantially the entire circumference. It can be pressed from the front side.
  • the frame 5 is, for example, a black metal member or a black synthetic resin member, and has a light shielding property. Further, the frame 5 can receive the back surface of the outer peripheral end portion of the liquid crystal display panel 3 with a concave surface 5b formed inside the upper surface of the frame portion 5a.
  • the chassis 14 is formed into a shallow box shape by bending a metal plate made of aluminum or the like, and the optical sheets 7 to 9, the light guide plate 11, the first reflection sheet 10, and the support member 15 are formed therein. And the LED board 20 can be accommodated.
  • the chassis 14 includes a bottom plate portion 14a having a horizontally long rectangular shape when viewed from above and a side plate portion 14b rising from the outer edges of the four sides of the bottom plate portion 14a. Further, the above-described frame 5 and bezel 2 can be fixed to the side plate portion 14b by screws or the like.
  • the three optical sheets 7 to 9 are composed of thin resin sheets having a horizontally long rectangular shape when seen in a plan view.
  • the optical sheets 7 to 9 are placed on the front side (light emitting side) of the light guide plate 11 and are interposed between the liquid crystal display panel 3 and the light guide plate 11.
  • a polarization selective reflection sheet 7, a lens sheet 8 and a diffusion sheet 9 having a thickness of about 0.1 to 0.5 mm are used in order from the top.
  • the diffusion sheet 9 is for making the luminance distribution uniform by diffusing the light emitted from the light guide plate 11.
  • the lens sheet 8 is for increasing the front luminance by condensing the light emitted from the diffusion sheet 9.
  • the polarization selective reflection sheet 7 is for selectively reflecting the light emitted from the lens sheet 8 so that the light is not absorbed by a polarizing plate (not shown) attached to the back surface of the liquid crystal display panel 3.
  • the light guide plate 11 is formed of a transparent resin plate having a horizontally long rectangular shape in a plan view and having a thickness of about 3 to 4 mm, for example.
  • the light guide plate 11 has a light incident surface 11a for introducing light from the LED 21 and a light emission surface 11b for emitting light introduced from the light incident surface 11a upward (irradiation direction). ing.
  • the light incident surface 11 a is configured by a predetermined side end surface of the light guide plate 11, and the light emitting surface 11 b is configured by the front surface of the light guide plate 11.
  • the light guide plate 11 reflects light incident from the light incident surface 11a repeatedly between the light emitting surface (front surface) 11b and the back surface 11c opposite to the light emitting surface 11b, and forms a planar shape inside the light guiding plate 11 It can be expanded.
  • a plurality of scattering portions are formed on the back surface 11c of the light guide plate 11 to scatter light incident from the light incident surface 11a and emit the light from the light emitting surface 11b.
  • a scattering part what was formed by printing the coating material containing a white pigment etc. on the back surface 11c of the light-guide plate 11 in the shape of a spot is applied.
  • the first reflection sheet 10 is disposed so as to cover the back surface 11c of the light guide plate 11 opposite to the light emitting surface 11b.
  • the first reflection sheet 10 is laid on the bottom plate portion 14a of the chassis 14.
  • the first reflecting sheet 10 is for reflecting light emitted from the back surface 11c of the light guide plate 11 to the back side toward the light guide plate 11, and is made of a resin having a thickness of about 0.1 to 2 mm, for example. Consists of sheets.
  • the front surface of the reflection sheet 10 is white, and the light emitted from the back surface 11c of the light guide plate 11 is efficiently reflected to the light guide plate 11 side so that the light utilization efficiency and the light emission surface of the light guide plate 11 are improved.
  • the brightness at 11b is increased.
  • the illumination device 4 can convert the light from the LED 21 into the planar light by the optical sheets 7 to 9, the light guide plate 11, and the first reflection sheet 10 and irradiate the back side of the liquid crystal display panel 3. It has become.
  • a power supply board 18 that supplies power to the LED board 20 and a control board 19 that drives the liquid crystal display panel 3 are disposed on the rear surface of the chassis 4.
  • the plurality of LEDs 21 provided on the LED substrate 20 are disposed in the vicinity of the light incident surface 11 a of the light guide plate 11.
  • the LED 21 has a package structure in which, for example, an LED chip that generates blue light is sealed with a transparent resin mixed with a yellow phosphor, and white light can be emitted from the light emitting surface 21a of the LED 21. Yes.
  • Such LEDs 21 are arranged at a predetermined interval along the light incident surface 11 a so that the light emitting surface 21 a faces the light incident surface 11 a of the light guide plate 11.
  • the LED substrate 20 includes a base material 22 made of metal such as aluminum.
  • This base material 22 (LED substrate 20) has a horizontally long belt shape.
  • an insulating layer 23 is formed on the front surface of the base material 22, and a plurality of LEDs 21, 21, 21,... Are aligned on the insulating layer 23 along the longitudinal direction thereof. Has been implemented.
  • the plurality of LEDs 21 are connected in series by a wiring pattern (not shown) formed on the insulating layer 23.
  • the base material 22 of the LED substrate 20 has a function of suppressing a temperature rise due to heat generation of the LED 21.
  • a heat conduction sheet (not shown) is interposed between the base material 22 and the support member 15, and the heat generated by the LED 21 is transmitted to the bottom plate of the chassis 14 via the base material 22, the heat conduction sheet and the support member 15. By conducting heat to the portion 14a (convex portion 14d), the temperature of the LED 21 is suppressed so as not to rise excessively.
  • the LED board 20 is attached in a standing state (standing state) on the support member 15 disposed on the bottom plate portion 14a in the vicinity of the side plate portion 14b of the chassis 14.
  • the support member 15 has a shape like a so-called bracket (an L-shaped mounting (fixing) fitting).
  • bracket an L-shaped mounting (fixing) fitting
  • the bottom plate portion 14a of the chassis 14 is provided with a convex portion 14d protruding downward, and the support member 115 is fixed to the convex portion 14d.
  • a belt-like second reflection sheet 16 having an adhesive layer on one side is adhered (attached) to the upper surface of the convex portion 14d.
  • the upper surface of the second reflective sheet 16 is white, and as shown in FIG. 2, the second reflective sheet 16 is arranged so as to fill a gap between the first reflective sheet 10 and the LED 21 and reflects light from the LED 21. Is configured to do.
  • a strip-shaped third reflection sheet 17 having an adhesive layer on one side is adhered (attached) to the lower surface 5 c of the frame 5.
  • the third reflection sheet 17 has a white lower surface, has a function of reflecting light from the LED 21, abuts against the upper surface of the end of the light guide plate 11, and makes the light guide plate 11 a bottom plate of the chassis 14. It also has a function as a pressing part that is sandwiched between the part 114a.
  • a low friction member 31 is provided on the lower surface (front surface) of the third reflection sheet 17 so as to cover the lower surface.
  • the low friction member 31 is interposed between the lower surface of the third reflection sheet 17 serving as a pressing portion of the frame 5 that sandwiches the light guide plate 11 with the chassis 14 and the upper end surface of the light guide plate 11. Due to the interposed configuration, even if members having different linear expansion coefficients are used in the light guide plate 11 and the frame 5, they slide smoothly with each other by the low friction member 31. Even if thermal contraction caused by thermal expansion caused by the LED 21 or temperature drop due to the turn-off of the LED 21 occurs, generation of abnormal noise (stagnation sound) caused by friction between the light guide plate 11 and the reflection sheet 17 is suppressed.
  • a transparent sheet 31 ⁇ / b> A is used as the low friction member 31.
  • This transparent sheet 31A is a resin sheet having a smooth surface (lower surface), and has an adhesive layer on the back surface (upper surface).
  • a sheet-like or tape-like one made of PET, fluororesin, Teflon (registered trademark), or the like can be exemplified.
  • a transparent sheet 31A having an adhesive layer on one side is bonded to the lower surface of the third reflection sheet 17 bonded to the lower surface 5c of the frame 5, and the frame 5 is connected to the light guide plate.
  • the transparent sheet 31 ⁇ / b> A (low friction member 31) can be easily interposed between the lower surface of the third reflection sheet 17 and the upper surface of the end portion of the light guide plate 11 simply by being attached to the chassis 14 in which 11 is accommodated. it can.
  • the transparent sheet 31A is transparent, it is possible to prevent the light reflection characteristics of the lower surface of the third reflection sheet 17 from being affected. Note that the surface (lower surface) of the low-friction member 31A described above, that is, the contact surface with the upper surface of the end portion of the light guide plate 11 only needs to slide well with the light guide plate 11, and is not necessarily smooth.
  • a transparent resin film 31 ⁇ / b> B coated on the surface (lower surface) of the third reflection sheet 17 is used as the low friction member 31.
  • the transparent resin film 31B include a polyethylene film.
  • a third reflection sheet 17 having a lower surface coated with a transparent resin film 31B is adhered to the lower surface 5c of the frame 5, and the frame 5 is a chassis in which the light guide plate 11 is accommodated.
  • the transparent resin film 31B (low friction member 31) can be interposed between the lower surface of the third reflection sheet 17 and the upper surface of the end portion of the light guide plate 11 simply.
  • the transparent resin film 31B is transparent, it is possible to prevent the light reflection characteristics of the lower surface of the third reflection sheet 17 from being affected.
  • the surface (lower surface) of the low friction member 31B described above that is, the contact surface with the upper surface of the end portion of the light guide plate 11 only needs to slide well with the light guide plate 11 and is not necessarily smooth.
  • lubricating grease 31 ⁇ / b> C is used as the low friction member 31.
  • examples of the lubricating grease 31C include silicon grease.
  • transparent lubricating grease 31C is applied to the lower surface of the third reflecting sheet 17 adhered to the lower surface 5c of the frame 5, and the light guide plate 11 accommodates the frame 5.
  • the lubricating grease 31 ⁇ / b> C (low friction member 31) can be easily interposed between the lower surface of the third reflection sheet 17 and the upper surface of the end portion of the light guide plate 11 simply by being mounted on the chassis 14. .
  • the lubricating grease 31C when the lubricating grease 31C is transparent, it is possible to prevent the light reflection characteristics of the lower surface of the reflection sheet from being affected.
  • the lubricating grease 31C may be white grease.
  • the light guide plate 11 is bonded to the lower surface 5 c of the frame 5 and between the lower surface of the third reflection sheet 17 and the light guide plate 11 as a pressing portion that holds the light guide plate 11 between the chassis 14. Since the low friction member 31 (31A to 31C) is interposed between the light guide plate 11 and the frame 5, even if members having different linear expansion coefficients are used, the low friction member 31 (31A to 31C) Even if thermal expansion caused by the temperature rise due to the lighting of the LED 21 or the heat shrink caused by the temperature drop due to the turning off of the LED 21 occurs because of sliding smoothly, the friction between the light guide plate 11 and the third reflection sheet 17 Occurrence of an abnormal noise (stagnation sound) is suppressed. Therefore, since the generation of abnormal noise is suppressed during or after use of the lighting device 4 in this way, the quality of the lighting device 4 and the liquid crystal display device 1 can be improved.
  • the present invention is not limited to these embodiments, and can be variously modified without departing from the gist of the present invention. Of course, it can be implemented.
  • the LED substrate 20 (light source) is disposed so as to face one long side of the light guide plate 11 having a rectangular shape, and one long side of the frame 5 corresponding to this.
  • the configuration in which the third reflection sheet 17 and the low friction member 31 are provided on the lower surface 5c of the frame portion 5a has been described.
  • the LED substrate 20 (light source) is disposed so as to face each of the pair of opposed long sides of the light guide plate 11, and the lower surfaces of the pair of frame portions 5a of the opposed long sides of the frame 5 corresponding thereto. You may make it the structure which provided the 3rd reflective sheet 17 and the low friction member 31 in 5c.
  • the LED substrate 20 (light source) is disposed so as to face one long side and one short side of the light guide plate 11, respectively, and the frame portion 5a on one long side of the frame 5 corresponding to this.
  • the third reflection sheet 17 and the low-friction member 31 may be provided on the lower surface 5c and the lower surface 5c of the frame 5a on one short side, respectively, and are not limited to the above-described embodiment.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

Le but de l'invention est de fournir un dispositif d'éclairage qui supprime la génération de bruit due au frottement entre une plaque de guidage de lumière et une feuille réfléchissante disposée sur la surface inférieure d'un cadre du fait de la chaleur générée par une source de lumière. Le dispositif d'éclairage (4) comprend : une plaque de guidage de lumière en forme de plaque (11) ; un châssis en forme de boîte (14) renfermant la plaque de guidage de lumière (11) et dont la surface supérieure est ouverte ; un cadre (5) qui s'étend le long de la section d'extrémité circonférentielle externe de la plaque de guidage de lumière (11) et qui est monté sur le côté supérieur du châssis (14) ; et une source de lumière (21) afin d'envoyer de la lumière sur une surface d'extrémité latérale prédéterminée de la plaque de guidage de lumière (11). La feuille réfléchissante (17), dont une fonction est de servir de section de pression prenant en sandwich la plaque de guidage de lumière (11) entre la feuille réfléchissante (17) et le châssis et dont une fonction est de réfléchir la lumière, est collée à la surface inférieure (5c) du cadre (5). Un élément à faible frottement (31) est disposé entre la surface côté inférieure de ladite feuille réfléchissante (17) et la plaque de guidage de lumière (11).
PCT/JP2011/075989 2010-11-12 2011-11-10 Dispositif d'éclairage et dispositif d'affichage à cristaux liquides le comprenant WO2012063917A1 (fr)

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JP2010-253743 2010-11-12
JP2010253743 2010-11-12

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Cited By (5)

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CN102865522A (zh) * 2012-10-12 2013-01-09 深圳市华星光电技术有限公司 背光模组
WO2014148362A1 (fr) * 2013-03-19 2014-09-25 堺ディスプレイプロダクト株式会社 Dispositif de rétroéclairage et dispositif d'affichage
JP2015176752A (ja) * 2014-03-14 2015-10-05 日本精機株式会社 照明装置及び表示装置
JP2019125504A (ja) * 2018-01-17 2019-07-25 オムロン株式会社 面光源装置、表示装置、及び電子機器
CN118151436A (zh) * 2024-05-10 2024-06-07 惠科股份有限公司 背光模组及显示装置

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JPH11176224A (ja) * 1997-12-10 1999-07-02 Sanyo Electric Co Ltd 面発光装置
JP2002190209A (ja) * 2000-12-21 2002-07-05 Enplas Corp 面光源装置及び画像表示装置
WO2004027314A1 (fr) * 2002-09-19 2004-04-01 Matsushita Electric Industrial Co., Ltd. Unite d'eclairage et ecran a cristaux liquides dans lequel elle est integree

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JP2002190209A (ja) * 2000-12-21 2002-07-05 Enplas Corp 面光源装置及び画像表示装置
WO2004027314A1 (fr) * 2002-09-19 2004-04-01 Matsushita Electric Industrial Co., Ltd. Unite d'eclairage et ecran a cristaux liquides dans lequel elle est integree

Cited By (8)

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CN102865522A (zh) * 2012-10-12 2013-01-09 深圳市华星光电技术有限公司 背光模组
WO2014148362A1 (fr) * 2013-03-19 2014-09-25 堺ディスプレイプロダクト株式会社 Dispositif de rétroéclairage et dispositif d'affichage
CN104520635A (zh) * 2013-03-19 2015-04-15 堺显示器制品株式会社 背光装置以及显示装置
JP2015176752A (ja) * 2014-03-14 2015-10-05 日本精機株式会社 照明装置及び表示装置
JP2019125504A (ja) * 2018-01-17 2019-07-25 オムロン株式会社 面光源装置、表示装置、及び電子機器
WO2019142620A1 (fr) * 2018-01-17 2019-07-25 オムロン株式会社 Dispositif source de lumière de surface, dispositif d'affichage et dispositif électronique
TWI693457B (zh) * 2018-01-17 2020-05-11 日商歐姆龍股份有限公司 面光源裝置、顯示裝置以及電子機器
CN118151436A (zh) * 2024-05-10 2024-06-07 惠科股份有限公司 背光模组及显示装置

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