WO2013061855A1 - Dispositif d'éclairage, dispositif d'affichage et dispositif de réception de télévision - Google Patents

Dispositif d'éclairage, dispositif d'affichage et dispositif de réception de télévision Download PDF

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Publication number
WO2013061855A1
WO2013061855A1 PCT/JP2012/076896 JP2012076896W WO2013061855A1 WO 2013061855 A1 WO2013061855 A1 WO 2013061855A1 JP 2012076896 W JP2012076896 W JP 2012076896W WO 2013061855 A1 WO2013061855 A1 WO 2013061855A1
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WO
WIPO (PCT)
Prior art keywords
light
light source
plate
guide plate
reflection sheet
Prior art date
Application number
PCT/JP2012/076896
Other languages
English (en)
Japanese (ja)
Inventor
健太郎 鎌田
Original Assignee
シャープ株式会社
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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 WO2013061855A1 publication Critical patent/WO2013061855A1/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
    • G02B6/0083—Details of electrical connections of light sources to drivers, circuit boards, or the like

Definitions

  • the present invention relates to a lighting device, a display device, and a television receiver.
  • the liquid crystal display device requires a backlight device as a separate illumination device because the liquid crystal panel used for this does not emit light.
  • a backlight device an edge light type backlight device in which a light incident surface is provided on a side surface of a light guide plate and a light source such as an LED is disposed on a side surface side of the light guide plate is known.
  • the edge light type backlight device a configuration in which a reflection sheet for reflecting light is laid between the light guide plate and the housing is known. By this reflection sheet, the light leaked from the light guide plate can be returned again into the light guide plate, and the light incident efficiency can be improved.
  • a light source substrate on which a light source is disposed is disposed between the light source and the side plate of the casing. In such a configuration, the light emitted from the light source and directed toward the side opposite to the light incident surface of the light guide plate of the light source reaches the surface of the light source substrate and is reflected by the light source substrate. Then, it goes to the light incident surface side of the light guide plate.
  • Patent Document 1 discloses a backlight device in which a light source substrate is disposed between a reflection sheet and a bottom plate of a casing.
  • An object of the technology disclosed in the present specification is to provide an illuminating device that can improve the light incident efficiency with respect to the light incident surface of light from a light source while realizing a narrow frame.
  • the technology disclosed in this specification includes a plate-shaped member, a light guide plate having a light incident surface on a side surface, and one of the plate surfaces facing the one surface side of the plate-shaped member, A light source disposed on the one surface side of the plate-like member so as to face the light incident surface, and a reflection sheet that reflects light from the light source, and is in contact with the one plate surface of the light guide plate
  • the abutting portion disposed on the light source side, an extension portion provided to extend from the edge of the contact portion toward the light source, and the light incident on the light source with the light source sandwiched therebetween.
  • a light source substrate to which the light source is attached a reflective sheet having a rising portion that rises on the other plate surface side of the light guide plate so as to face the surface, a through hole provided in the extension portion, and It has a plate surface along the plate surface of the plate-like member, is arranged between the plate-like member and the reflection sheet, and the light source is A light source substrate made exposed to the light guide plate side of the reflecting sheet from serial through-hole, a lighting device comprising a.
  • the light directed toward the side opposite to the light incident surface of the light guide plate of the light source can be reflected by the rising portion of the reflection sheet and directed toward the light incident surface. For this reason, the light incident efficiency with respect to the light incident surface of the light from the light source can be improved while realizing a narrow frame of the lighting device.
  • the rising portion may rise until it faces the entire surface of the light source opposite to the surface facing the light incident surface. According to this configuration, light rising toward the side opposite to the side facing the light incident surface of the light guide plate of the light source can be effectively reflected by the rising portion, further improving the light incident efficiency of the light from the light source Can be made.
  • a perforation may be provided along the bent line segment of the rising portion. According to this configuration, the reflective sheet can be easily bent along the perforation when the lighting device is manufactured.
  • a support member that is provided on the light source substrate and penetrates the through hole and supports the light source may be further provided. According to this configuration, a specific configuration for supporting the light source can be realized.
  • the light source may have a plate shape, and one plate surface may be mounted on the light source substrate, and the side surface may be a light exit surface. According to this configuration, it is possible to realize a specific configuration for arranging a light source whose side surface is a light exit surface.
  • a plurality of the light sources wherein the reflection sheet has a plurality of the through holes, and each of the plurality of light sources is exposed from the plurality of the through holes to the light guide plate side of the reflection sheet.
  • strength of a reflection sheet can be improved compared with the case where a some light source is penetrated by one big through-hole.
  • the plurality of light sources may be arranged such that the distance between the light exit surface and the light entrance surface is equal between the light sources. According to this configuration, the amount of light incident on the light incident surface from each light source can be made equal, so that the optical design of the illumination device can be made favorable.
  • the said through-hole may be provided in the edge part by the side of the said rising part of the said extension part. According to this configuration, since the light source is arranged in the vicinity of the rising portion, it is possible to suitably realize a narrow frame of the lighting device.
  • the chassis may further include a chassis having the plate-like member and a side plate rising from an edge thereof, and the rising portion may rise so as to be perpendicular to the extension portion. According to this configuration, the rising portion of the bent reflection sheet can be brought into contact with the side plate of the chassis, and the rising portion can be hardly bent.
  • the technology disclosed in this specification can also be expressed as a display device including a display panel that performs display using light from the above-described lighting device.
  • a frame is further provided between the chassis and the light source, the light source substrate, the display panel, and the light guide plate.
  • the bottom plate of the chassis is on the display panel side with respect to the light guide plate. It may be arranged on the opposite side. According to this configuration, a display device that does not include a cabinet can be realized.
  • a display device in which the display panel is a liquid crystal panel using liquid crystal is also new and useful.
  • a television receiver provided with the above display device is also new and useful.
  • FIG. 1 is an exploded perspective view of a television receiver TV according to Embodiment 1.
  • FIG. An exploded perspective view of the liquid crystal display device 10 is shown.
  • a cross-sectional view of the liquid crystal display device 10 is shown.
  • the principal part sectional view of liquid crystal display 10 is shown.
  • the perspective view of the reflection sheet 26 in the LED light source 28 vicinity is shown.
  • FIG. 4 is a cross-sectional view of a main part of a liquid crystal display device 110 according to a second embodiment.
  • the perspective view of the reflective sheet 126 in the LED light source 128 vicinity is shown.
  • seat 226 in the LED light source 228 vicinity which concerns on Embodiment 3 is shown.
  • FIG. 6 is a cross-sectional view of a main part of a liquid crystal display device 310 according to a fourth embodiment.
  • Embodiment 1 will be described with reference to the drawings.
  • a part of each drawing shows an X-axis, a Y-axis, and a Z-axis, and each axis direction is drawn in a common direction in each drawing.
  • the Y-axis direction coincides with the vertical direction
  • the X-axis direction coincides with the horizontal direction.
  • the vertical direction is used as a reference for upper and lower descriptions.
  • FIG. 1 is an exploded perspective view of the television receiver TV according to the first embodiment.
  • the television receiver TV includes a liquid crystal display device 10, front and back cabinets Ca and Cb that are accommodated so as to sandwich the display device D, a power source P, a tuner T, and a stand S.
  • FIG. 2 is an exploded perspective view of the liquid crystal display device 10.
  • the upper side shown in FIG. 2 is the front side, and the lower side is the back side.
  • the liquid crystal display device 10 has a horizontally long rectangular shape as a whole, and includes a liquid crystal panel 16 as a display panel and a backlight device 24 as an external light source, and these form a bezel having a frame shape. 12 and the like are integrally held.
  • the liquid crystal panel 16 has a configuration in which a pair of transparent (highly translucent) glass substrates are bonded together with a predetermined gap therebetween, and a liquid crystal layer (not shown) is enclosed between the glass substrates. Is done.
  • One glass substrate is provided with a switching element (for example, TFT) connected to a source wiring and a gate wiring orthogonal to each other, a pixel electrode connected to the switching element, an alignment film, and the like.
  • the substrate is provided with a color filter and counter electrodes in which colored portions such as R (red), G (green), and B (blue) are arranged in a predetermined arrangement, and an alignment film.
  • image data and various control signals necessary for displaying an image are supplied to a source wiring, a gate wiring, a counter electrode, and the like from a driving circuit board (not shown).
  • a polarizing plate (not shown) is disposed outside both glass substrates.
  • FIG. 3 shows a cross-sectional view of a cross section of the liquid crystal display device 10 cut along the vertical direction (Y-axis direction).
  • the backlight device 24 includes a frame 14, an optical member 18, and a chassis 22.
  • the frame 14 has a frame shape, is disposed along the edge side of the surface of the light guide plate 20 (light output surface 20b), and supports the liquid crystal panel 16 along the inner edge.
  • the optical member 18 is placed on the front side of the light guide plate 20 (the light exit surface 20b side).
  • the chassis 22 has a substantially box shape opened to the front side (light emission side, liquid crystal panel 16 side).
  • the chassis 22 is made of a metal such as an aluminum-based material, for example, and has a bottom plate 22a having a rectangular shape in plan view, side plates 22b and 22c rising from outer edges of both long sides of the bottom plate 22a, and each of short sides of the bottom plate 22a. It consists of a side plate that rises from the outer edge.
  • a space facing each LED light source 28, 28 described later in the chassis 22 is a housing space for the light guide plate 20.
  • a power circuit board (not shown) for supplying power to the LED unit 32 is attached to the back side of the bottom plate 22a.
  • a pair of LED (Light Emitting Diode) substrates 30 and 30, a plurality of LED light sources 28, a reflective sheet 26, and a light guide plate 20 are accommodated in the chassis 22.
  • the pair of LED boards 30, 30 extend in the long side direction of the chassis 22, respectively, and are disposed between the reflection sheet 26 and the bottom plate 22 a of the chassis 22 in the cross-sectional view shown in FIG. 3.
  • each LED light source 28 is erected on a plate surface of each LED substrate 30, 30 via a support member 29 described later in a state where its light exit surface faces the light incident surface 20 a of the light guide plate 20. Light is emitted toward the light incident surface 20a side.
  • the longitudinal side surface (light incident surface) 20a of the light guide plate 20 is disposed at a position facing each LED light source 28, and guides light emitted from the LED light source 28 to the liquid crystal panel 16 side.
  • the optical member 18 is placed on the front side of the light guide plate 20.
  • the light guide plate 20 and the optical member 18 are arranged directly below the liquid crystal panel 16 and the LED unit 32 that is a light source is arranged at the side end of the light guide plate 20.
  • a so-called edge light system (side light system) is adopted.
  • edge light system side light system
  • positioning aspect of the LED board 30, LED light source 28, and the reflection sheet 26 are demonstrated in detail later.
  • the optical member 18 is formed by laminating a diffusion sheet 18a, a lens sheet 18b, and a reflective polarizing plate 18c in order from the light guide plate 20 side.
  • the diffusion sheet 18a, the lens sheet 18b, and the reflective polarizing plate 18c have a function of converting light emitted from the LED unit 32 and passing through the light guide plate 20 into planar light.
  • a liquid crystal panel 16 is installed on the upper surface side of the reflective polarizing plate 18 d, and the optical member 18 is disposed between the light guide plate 20 and the liquid crystal panel 16.
  • Each LED light source 28 emits white light.
  • the LED light source 28 may emit white light by applying a phosphor having a light emission peak in a yellow region to a blue light emitting element.
  • the blue light emitting element may emit white light by applying a phosphor having emission peaks in the green and red regions.
  • a phosphor having a light emission peak in a green region may be applied to a blue light emitting element, and white light may be emitted by combining a red light emitting element.
  • the LED light source 28 may emit white light by combining a blue light emitting element, a green light emitting element, and a red light emitting element.
  • a combination of an ultraviolet light emitting element and a phosphor may be used.
  • an ultraviolet light-emitting element may emit white light by applying a phosphor having emission peaks in blue, green, and red, respectively.
  • the light guide plate 20 is a rectangular plate-like member, is formed of a highly transparent (highly transparent) resin such as acrylic, is in contact with the reflective sheet 26 and is supported by the chassis 22. Yes. As shown in FIGS. 2 and 3, the light guide plate 20 is a plate surface opposite to the light output surface 20b with the light output surface 20b as the main plate surface facing the diffusion sheet 18a between the LED light sources 28. The opposite plate surface 20c is arranged so as to face the reflection sheet 26 side. By arranging such a light guide plate 20, the light generated from the LED light source 28 enters the light entrance surface 20 a of the light guide plate 20 and exits from the light exit surface 20 b facing the diffusion sheet 18 a, The liquid crystal panel 16 is irradiated from the back side.
  • a highly transparent resin such as acrylic
  • FIG. 4 is a cross-sectional view of the main part of the liquid crystal display device 10 and shows an enlarged cross-sectional view of the vicinity of the LED light source 28 in FIG.
  • FIG. 5 is a perspective view of the reflection sheet 26 in the vicinity of the LED light source 28.
  • the LED board 30 has a rectangular shape made of resin. As shown in FIG. 2, the LED board 30 faces the front side and the back side of the backlight device 24 in the long side direction of the chassis 22 as shown in FIG. It extends. As shown in FIG.
  • the LED substrate 30 has a plate surface on the back side in contact with the bottom plate 22 a of the chassis 22, and one side surface (side surface directed to the outside of the backlight device 24). It arrange
  • the reflection sheet 26 has a rectangular shape, is made of a synthetic resin, has a white surface with excellent light reflectivity, and has a light reflection surface on the front side.
  • the reflection sheet 26 comes from a contact portion 26 a that contacts the opposite plate surface 20 c of the light guide plate 20 and an end portion of the contact portion 26 a (a portion overlapping the light incident surface 20 a).
  • the chassis 22 includes an extension portion 26b extending toward the side plate 22b (22c) side of the chassis 22 and a rising portion 26c that is bent from the end portion of the extension portion 26b to the front side and rises.
  • the end part side of the contact part 26 a near the part overlapping the light incident surface 20 a
  • the extension part 26 b are arranged in a state of being placed on the front side of the LED substrate 30. That is, a part of the reflection sheet 26 is sandwiched between the light guide plate 20 and the LED substrate 28.
  • the leading end of the extending portion 26b is in contact with the side plate 22b (22c) of the chassis, and the rising portion 26c is bent and rises from the leading end of the extending portion 26b so as to be perpendicular to the extending portion 26b. .
  • a perforation 26e is provided in advance at the boundary between the extending portion 26b and the rising portion 26c along the bent line segment. For this reason, when the reflective sheet 26 is accommodated in the chassis 22 when the backlight device 24 is manufactured, the bent portion at the boundary between the extending portion 26b and the rising portion 26c is easily bent.
  • a plurality of through-holes 26 d having a rectangular shape in plan view are formed at the distal end portion (end portion on the rising portion 26 b side) of the extending portion 26 b along the long side direction of the chassis 22. They are arranged in a line. And from each through-hole 26d, the LED light source 28 is exposed to the front side of the reflective sheet 26 through the support member 29. The support member 29 is erected on the LED substrate 30, and one LED light source 28 is supported by two support members 29. Between each through-hole 26d, the extending part 26b and the rising part 26c are in a continuous state, and the rising part 26c is positioned between the LED light source 28 and the side plate 22b (22c) of the chassis 22.
  • the rising portion 26c is arranged so as to face the surface opposite to the light exit surface 28a (see FIG. 5) of each LED light source 28.
  • Each LED light source 28 is mounted on the LED substrate 30 so that the distance between the light exit surface 28 a and the light incident surface 20 a of the light guide plate 20 is equal between the LED light sources 28.
  • the rising portion 26c is bent so as to be perpendicular to the extending portion 26b, and is parallel to the light incident surface 20a of the light guide plate 20 as shown in FIG.
  • the rising portion 26 c rises to the front side from the LED light source 28. Therefore, the rising portion 26c faces the entire surface of the surface opposite to the surface (light exit surface 28a) facing the light incident surface 20a of the LED light source 28.
  • the rising portion 26c of the reflection sheet 26 is disposed so as to face the surface opposite to the surface (light exit surface 28a) facing the light incident surface 20a of the LED light source 28. Therefore, the light emitted from the LED light source 28 and directed to the side opposite to the light exit surface 28 a of the LED light source 28 can be reflected by the rising portion 26. And since the light reflected by the rising part 26 goes again to the light incident surface 20a of the light guide plate 20, the light incident efficiency of the light emitted from the LED light source 28 on the light incident surface 20a of the light guide plate 20 is increased. Can be improved.
  • the light directed toward the side opposite to the side facing the light incident surface 20a of the light guide plate 20 of the LED light source 28 is reflected by the rising portion 26c of the reflection sheet 26. , Can be directed toward the light incident surface 20a. For this reason, the light incident efficiency with respect to the light incident surface 20a of the light from the LED light source 28 can be improved while realizing the narrow frame of the backlight device 24.
  • the rising portion 26c can be provided only by bending the end portion of the reflection sheet 26, and the LED light source 28 can be exposed to the front side of the reflection sheet 26 only by providing the through hole 26d in the extension portion 26c.
  • the narrow frame type backlight device 24 with improved light incident efficiency can be realized with a simple configuration.
  • the rising portion 26c of the reflection sheet 26 is the entire surface of the surface opposite to the surface facing the light incident surface 20a of the LED light source 28 (light exit surface 28a). It stands up until it opposes. For this reason, the light which went to the opposite side to the light incident surface 20a of the light guide plate 20 of the LED light source 28 can be effectively reflected by the rising portion 26c, and light incident from the LED light source 28 can be reflected. Efficiency can be further improved.
  • the reflection sheet 26 can be easily bent along the perforation.
  • the backlight device 24 includes a plurality of LED light sources 28.
  • the reflection sheet 26 has a plurality of through holes 26d, and each of the plurality of LED light sources 28 is exposed to the light guide plate 20 side from the reflection sheet 26 from each of the plurality of through holes 26d. For this reason, the intensity
  • the plurality of LED light sources 28 are arranged such that the distance between the light exit surface 28a and the light incident surface 20a is equal between the LED light sources 28. . For this reason, the amount of light incident on the light incident surface 20a from each LED light source 28 can be made equal, and the optical design of the backlight device 24 can be made favorable.
  • the through hole 26d is provided at the end of the extending portion 26b of the reflection sheet 26 on the rising portion 26c side.
  • the backlight device 24 further includes a chassis 22 having a bottom plate 22a and side plates 22b and 22c rising from the edge thereof.
  • the rising portion 26c rises so as to be perpendicular to the extending portion 26b.
  • FIG. 6 is a cross-sectional view of a main part of the liquid crystal display device 110 according to the second embodiment.
  • FIG. 7 is a perspective view of the reflection sheet 126 in the vicinity of the LED light source 128.
  • the second embodiment is different from the first embodiment in the configuration and mounting manner of the LED light source 128. Since the other configuration is the same as that of the first embodiment, the description of the structure, operation, and effect is omitted.
  • the part where the numeral 100 is added to the reference numeral in FIG. 4 and the part where the numeral 100 is added to the reference numeral in FIG. 5 in FIG. 7 are the same as those described in the first embodiment.
  • one main surface of a rectangular parallelepiped LED light source 128 is directly mounted on the LED substrate 130.
  • the through-hole 126d provided in the extending part 126b of the reflection sheet 126 has a size that allows the LED light source 128 to be inserted.
  • one side surface facing the light incident surface 120a of the light guide plate 120 is a light exit surface 128a. Even when the side-emitting LED light source is attached in this way, the rising portion 126c of the reflection sheet 126 can be arranged so as to face the surface opposite to the light exit surface 128a of the LED light source 128.
  • the light incident efficiency of the backlight device can be improved while realizing a narrow frame of the backlight device 124.
  • FIG. 8 is a perspective view of the reflection sheet 226 in the vicinity of the LED light source 228 according to the third embodiment.
  • the shape of the through hole 226d provided in the extending portion 226b of the reflection sheet 226 is different from that in the first embodiment. Since the other configuration is the same as that of the first embodiment, the description of the structure, operation, and effect is omitted.
  • the part obtained by adding the numeral 200 to the reference numeral in FIG. 5 is the same as the part described in the first embodiment.
  • the through hole 226 d provided in the extending portion 226 b of the reflection sheet 226 has a shape in which the opening end is semicircular. Even when the through hole 226d has such a shape, the LED light source 228 erected on the LED substrate 230 can be exposed to the front side, and the rising portion 226c of the reflection sheet 226 can be used as the LED light source. Since it can be arranged so as to face the surface opposite to the light exit surface 228a of 228, the light incident efficiency of the backlight device can be improved while realizing a narrow frame of the backlight device.
  • FIG. 9 is a cross-sectional view of a main part of the liquid crystal display device 310 according to the fourth embodiment.
  • the fourth embodiment is different from that of the first embodiment in that the liquid crystal display device 310 does not include a cabinet. Since the other configuration is the same as that of the first embodiment, the description of the structure, operation, and effect is omitted.
  • the part obtained by adding the numeral 300 to the reference sign in FIG. 4 is the same as the part described in the first embodiment.
  • the liquid crystal display device 310 does not include a cabinet, and the frame 314 is exposed to the outside as shown in FIG.
  • the frame 314 is attached to the chassis 322 so that a space for accommodating the light guide plate 320 and the LED light source 328 is formed. That is, the LED light source 328, the LED substrate 330, the liquid crystal panel 316, and the light guide plate 320 are accommodated between the frame 314 and the chassis 322.
  • elastic members 315 a and 315 b are interposed between the frame 314 and the liquid crystal panel 316, and the edge of the liquid crystal panel 316 is prevented from coming into contact with the frame 314 and being damaged.
  • the rising portion 326c of the reflection sheet 326 can be disposed so as to face the surface opposite to the light exit surface 328a of the LED light source 328, so that the narrow frame of the backlight device 324 is provided.
  • the light incident efficiency of the backlight device 324 can be improved.
  • the bottom plates 22a, 122a, 322a are examples of “plate members”.
  • LED light sources 28, 128, 228, and 328 are examples of “light sources”.
  • the LED substrates 30, 130, 230, and 330 are examples of the “light source substrate”.
  • the backlight devices 24, 124, and 324 are examples of “illumination devices”.
  • the liquid crystal display devices 10, 110, and 310 are examples of the “display device”.
  • the configuration in which the through holes are provided in a row in the extending portion of the reflection sheet is illustrated, but the position, size, shape of the through holes, etc. are not limited. .
  • the LED light source should just be provided in the aspect which can be exposed to the front side of a reflective sheet through a through-hole.
  • a configuration in which one large through hole is provided in the extending portion and a plurality of LED light sources are exposed from the one through hole on the front side of the reflection sheet may be employed.
  • the configuration in which the LED substrate is placed on the bottom plate of the chassis is exemplified.
  • the LED substrate is placed on the bottom surface of the heat sink. It may be a configuration.
  • the position, size, shape, number, and the like of the through holes provided in the extending portion can be changed as appropriate.
  • the configuration of the reflection sheet can be changed as appropriate.
  • the television receiver provided with the tuner is exemplified, but the present invention can also be applied to a display device that does not include the tuner.
  • TV TV receiver, Ca, Cb: cabinet, T: tuner, S: stand, 10, 110, 310: liquid crystal display, 12, 112, 312: bezel, 14, 114, 314: frame, 16, 116, 316: Liquid crystal panel, 18, 118, 218, 318: Optical member, 20, 120, 320: Light guide plate, 20a, 120a, 320a: Light incident surface, 22, 122, 322: Chassis, 24, 124, 324: Back Light device 26, 126, 226, 326: reflection sheet, 26a, 126a, 226a, 326a: contact part, 26b, 126b, 226b, 326b: extension part, 26c, 126c, 226c, 326c: rising part, 26d 126d, 226d, 326d: through hole, 28, 128, 228, 328: LED light source, 2, , 229,329: support member, 30,130,230,330: LED board

Abstract

L'invention concerne un dispositif (24) de rétro-éclairage comportant : un châssis (22) doté d'une plaque inférieure (22a) ; une plaque-guide (20) de lumière dotée d'une surface (20a) d'entrée de lumière sur la surface latérale ; une source lumineuse (28) à DEL disposée face à la surface (20a) d'entrée de lumière ; une feuille réfléchissante (26) servant à réfléchir la lumière provenant de la source lumineuse (28) à DEL, la feuille réfléchissante (26) étant équipée d'une partie (26a) de contact disposée de façon à entrer en contact avec une des surfaces plates de la plaque-guide (20) de lumière, une partie (26b) de prolongement disposée de façon à s'étendre à partir du bord de la partie (26a) de contact en direction de la source lumineuse (28) à DEL, une partie surélevée (26c) repliée en partant du bord de la partie (26b) de prolongement et surélevée de façon à faire face à la surface (20a) d'entrée de lumière, la source lumineuse (28) à DEL se trouvant entre celles-ci, et un trou débouchant (26d) pratiqué dans la partie (26b) de prolongement ; et un substrat (30) à DEL qui présente une surface plate le long de la surface plate de la plaque inférieure (22a), est disposé entre la plaque inférieure (22a) et la feuille réfléchissante (26), et dans lequel la source lumineuse (28) à DEL s'étend à partir du trou débouchant (26d), plus loin en direction de la plaque-guide (20) de lumière que la feuille réfléchissante (26).
PCT/JP2012/076896 2011-10-25 2012-10-18 Dispositif d'éclairage, dispositif d'affichage et dispositif de réception de télévision WO2013061855A1 (fr)

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JP2011233826 2011-10-25
JP2011-233826 2011-10-25

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103727434A (zh) * 2013-12-20 2014-04-16 苏州东山精密制造股份有限公司 一种侧光式背光模组
WO2016086473A1 (fr) * 2014-12-03 2016-06-09 深圳市华星光电技术有限公司 Module de rétroéclairage et dispositif d'affichage à cristaux liquides

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WO2016086473A1 (fr) * 2014-12-03 2016-06-09 深圳市华星光电技术有限公司 Module de rétroéclairage et dispositif d'affichage à cristaux liquides
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