WO2012111501A1 - Dispositif d'éclairage, dispositif d'affichage et dispositif récepteur de télévision - Google Patents

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

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Publication number
WO2012111501A1
WO2012111501A1 PCT/JP2012/052838 JP2012052838W WO2012111501A1 WO 2012111501 A1 WO2012111501 A1 WO 2012111501A1 JP 2012052838 W JP2012052838 W JP 2012052838W WO 2012111501 A1 WO2012111501 A1 WO 2012111501A1
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WO
WIPO (PCT)
Prior art keywords
light
guide plate
plate
light guide
reflection sheet
Prior art date
Application number
PCT/JP2012/052838
Other languages
English (en)
Japanese (ja)
Inventor
信宏 笠井
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 WO2012111501A1 publication Critical patent/WO2012111501A1/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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • 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 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.
  • Patent Document 1 discloses an edge light type backlight device capable of achieving high brightness.
  • this backlight device light incident surfaces are provided on both side surfaces of the light guide plate which are parallel to each other, and light sources are arranged on both sides of the light guide plate so as to face each other with the light guide plate interposed therebetween. Then, by surrounding the light incident surface of the light guide plate with a reflecting member that reflects light, the incident efficiency of the light emitted from the light source is increased to increase the luminance.
  • a light incident surface may be provided on one side surface of the light guide plate, and a light source may be disposed only on the light incident surface side.
  • a light source When the light source is disposed only on one side surface of the light guide plate in the backlight device of Patent Document 1, light incident on the light guide plate leaks out from the side surface opposite to the light incident surface to the outside of the light guide plate. There is a possibility that the utilization efficiency of the light incident on the inside is lowered.
  • the present invention has been created in view of the above problems.
  • the present invention provides a technique capable of improving the utilization efficiency of light incident on a light guide plate with a simple configuration in an edge light type illumination device in which a light source is arranged only in one direction around a side surface of the light guide plate. For the purpose.
  • the technology disclosed in this specification includes a light incident surface provided on one side surface, an opposite side surface that is a side surface opposite to the light incident surface, and a light exit surface provided on one surface of the plate surface.
  • a light guide plate having a surface opposite to the light exit surface, a light source disposed opposite to the light incident surface of the light guide plate, and the opposite plate of the light guide plate
  • a reflection sheet having an extending portion that is disposed on a surface side and extends from the opposite side surface of the light guide plate, a bottom plate, and a side plate that rises on one surface side of the bottom plate, and the light guide plate
  • a housing member that houses at least the light source and the reflection sheet, and the extension portion of the reflection sheet extends at least partially in the rising direction of the side plate and is formed between the side plate and the opposite side surface.
  • the present invention relates to a lighting device interposed therebetween.
  • the extension portion of the reflection sheet faces the opposite side surface of the light guide plate, the light emitted from the light source and entering the light guide plate is opposite to the light guide plate.
  • the light leaking from the side surface is reflected by at least a part of the extending portion of the reflection sheet and returned again into the light guide plate.
  • the extension part of the reflection sheet may be provided with a first fold that can bend at least a part of the extension part in the rising direction of the side plate. According to this configuration, in the manufacturing process of the lighting device, the extension portion of the reflection sheet is bent along the first fold, so that the portion facing the opposite side surface of the light guide plate in the extension portion can be easily formed. Can do.
  • a perforated cut may be provided along the first fold.
  • an incision cut into a half depth in the thickness direction of the reflection sheet along the first fold may be provided. According to these configurations, the reflecting sheet can be easily bent along the first crease in the manufacturing process of the lighting device.
  • the extension portion of the reflection sheet may be at least partially opposed to the entire surface of the opposite side surface of the light guide plate. According to this structure, all the light which went to the opposite side surface of a light-guide plate can be reflected in a light-guide plate by the extension part of a reflection sheet. For this reason, the utilization efficiency of the light incident on the light guide plate can be further improved.
  • the light guide plate further includes a frame member arranged along an edge side of the light exit surface of the light guide plate, and the extending portion of the reflection sheet has an edge extending to the light exit surface side of the light guide plate and the light exit surface. And the frame member.
  • the extension portion of the reflection sheet may be provided with a second fold that can bend a part of the extension portion toward the light exit surface of the light guide plate. According to this configuration, in the manufacturing process of the lighting device, the extension portion of the reflection sheet is bent along the second fold, thereby easily forming a portion extending to the light output surface side of the light guide plate in the extension portion. Can do.
  • a perforated cut may be provided along the second fold.
  • a notch that is cut to a half depth in the thickness direction of the reflective sheet along the second fold may be provided. According to these configurations, the reflecting sheet can be easily bent along the second crease in the manufacturing process of the lighting device.
  • At least a part of the extension part of the reflection sheet may face the opposite side surface in parallel. According to this configuration, light that leaks from the opposite side surface of the light guide plate and travels toward the extension portion of the reflection sheet hits the extension portion perpendicularly, so that the light is effectively reflected into the light guide plate. Can do.
  • a portion of the reflection sheet that faces the opposite side surface of the extension portion in parallel may abut against the side plate. According to this structure, since the extension part of a reflective sheet is supported by a side plate, the said extension part can be stabilized.
  • the opposite side surface may be arranged to extend to the vicinity of the side plate, and a portion of the reflection sheet that contacts the side plate may be sandwiched between the side plate and the opposite side surface. According to this configuration, since the portion facing the opposite side surface of the extending portion of the reflecting sheet is held by the light guide plate and the housing member, the extending portion of the reflecting sheet is prevented or suppressed from being displaced due to changes over time. can do.
  • a portion of the reflection sheet that is sandwiched between the side plate and the opposite side surface of the extension portion may abut on the entire surface of the opposite side surface. According to this configuration, all the light directed to the opposite side surface of the light guide plate is reflected into the light guide plate by the extension portion of the reflection sheet while preventing or suppressing the positional deviation of the extension portion of the reflection sheet. Can do.
  • the light source substrate side extending portion of the reflective sheet may have its tip abutting on the light source substrate. According to this configuration, when the reflective sheet is disposed in the manufacturing process of the lighting device, the reflective sheet can be easily positioned by bringing the tip of the light source substrate side extension portion into contact with the light source substrate. .
  • the light source may be a white diode. According to this configuration, the life of the light source can be extended and the power consumption can be reduced.
  • the white light emitting diode may include a first light emitting chip that emits blue light, and a first light emitting layer that is provided around the first light emitting chip and has a light emission peak in a yellow region. .
  • a first light emitting chip that emits blue light, a third light emitting layer that is provided around the first light emitting chip and has a light emission peak in a green region, and a second light emitting chip that emits red light May be included.
  • it may include a first light emitting chip that emits blue light, a second light emitting chip that emits red light, and a third light emitting chip that emits green light.
  • 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 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.
  • FIG. 6 is a cross-sectional view of the vicinity of the opposite side surface 20d of the light guide plate 20 and shows how light is reflected by the extension 26b of the reflection sheet 26;
  • FIG. 3 shows a cross-sectional view of a liquid crystal display device 110 according to a second embodiment.
  • FIG. 6 shows a cross-sectional view of a liquid crystal display device 210 according to Embodiment 3.
  • 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 sealed 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 drive 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).
  • a light emitting diode (LED) unit 32 In the chassis 22, a light emitting diode (LED) unit 32, a reflection sheet 26, and a light guide plate 20 are accommodated.
  • the LED unit 32 is disposed on one long side outer edge (side plate) 22b of the chassis 22 and emits light.
  • One longitudinal side surface (light incident surface) 20a of the light guide plate 20 is disposed at a position facing the LED unit 32, and guides light emitted from the LED unit 32 to the liquid crystal panel 16 side.
  • the opposite side surface (side surface in the other long side) 20d opposite to the light incident surface 20a of the light guide plate 20 faces a part of the reflection sheet 26.
  • 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 disposed directly below the liquid crystal panel 16 and the LED unit 32 that is a light source is disposed on the side end of the light guide plate 20.
  • a so-called edge light system (side light system) is adopted.
  • the backlight device 24 realizes a configuration in which the LED unit 32 is arranged only in one direction around the side surface of the light guide plate 20.
  • the chassis 22 is made of a metal such as an aluminum material, for example, and has a bottom plate 22a having a rectangular shape in a plan view, side plates 22b and 22c rising from outer edges of both long sides of the bottom plate 22a, and both short sides of the bottom plate 22a. It consists of a side plate that rises from the outer edge.
  • a space facing the LED unit 32 and the one side plate 22 c 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.
  • 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.
  • the LED unit 32 has a configuration in which LED light sources 28 that emit white light are arranged in a row on a resin-made rectangular LED board 30.
  • the LED substrate 30 is fixed to one side plate 22b of the chassis 22 by screws or the like.
  • 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. Further, a combination of an ultraviolet light emitting element and a phosphor may be used. In particular, 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 FIG. 2, the light guide plate 20 has a light output surface 20b as a main plate surface facing the diffusion sheet 18a between the LED unit 26 and one side plate 22c of the chassis 22, and is opposite to the light output surface 20b.
  • the opposite plate surface 20c which is the plate surface, is arranged in such a manner as to face the reflection sheet 26 side.
  • the light generated from the LED unit 32 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.
  • the reflection sheet 26 has a longitudinal shape, is made of a synthetic resin, has a white surface with excellent light reflectivity, and is placed on the front side of the bottom plate 22 a of the chassis 22.
  • the reflection sheet 26 has a reflection surface on the front side, and this reflection surface is in contact with the opposite plate surface 20 c of the light guide plate 20. And the reflection sheet 26 can reflect the light which leaked from the LED unit 32 or the light-guide plate 20 to the reflective surface side.
  • an LED substrate side extending portion 26 d extending from the light incident surface 20 a side of the light guide plate 20 toward the LED substrate 30 side is provided. Is provided. The tip of the LED board side extending portion 26 d is in contact with the surface of the LED board 30. For this reason, it is possible to reflect the light emitted from the LED light source and directed toward the LED substrate side extending portion 26d of the reflection sheet 26 toward the light incident surface 20a side of the light guide plate 20 by the LED substrate side extending portion 26d. It has become.
  • the opposite side surface 20d side of the light guide plate 20 is provided at one end of the reflection sheet 26 located on the side plate 22c side of the chassis 22 (on the opposite side to the LED unit 32 side with the light guide plate 20 interposed).
  • An extending portion 26 b extending from one side plate 22 c of the chassis 22 toward the side plate 22 c is provided.
  • the extending portion 26b extends from the opposite side surface 20d side of the light guide plate 20 to the side plate 22c side of the chassis 22 and comes into contact with the side plate 22c.
  • the extending portion 26b is bent at a substantially right angle to the rising side (front side) of the side plate 22c. Further extending in contact with the side plate 22c. Accordingly, a portion of the extending portion 26b extending in the direction in which the side plate 22c rises faces the opposite side surface 20d of the light guide plate 20 in parallel as shown in FIG.
  • the extending portion 26b extending in the direction in which the side plate 22c rises is in contact with the back surface of the frame 14 disposed on the front side of the side plate 22c, and is bent substantially at right angles to the light output surface 20b side (inside the chassis 22) of the light guide plate 20.
  • the light guide plate 20 further extends toward the light exit surface 20b.
  • the portion of the extending portion 26b that extends toward the light exit surface 20b side of the light guide plate 20 extends to the end edge portion of the light exit surface 20b and contacts the end edge portion, and the contact portion corresponds to the tip of the extending portion 26b. It has become.
  • the extending portion 26b of the reflection sheet 26 is provided with a first fold line 26c1 and a second fold line 26c2 that can be bent inward (front side) in a state where the reflection sheet 26 is placed on the bottom plate of the chassis ( (See FIG. 2).
  • the first fold line 26c1 and the second fold line 26c2 are provided in a substantially linear shape along the longitudinal direction (X-axis direction) of the reflection sheet 26, and along the first fold line 26c1 and the second fold line 26c2. Perforated cuts are provided. For this reason, in the manufacturing process of the backlight device 24, the extension portion 26b of the reflection sheet 26 is bent at a substantially right angle along the first fold line 26c1, so that the opposite side surface 20d of the light guide plate 20 described above in the extension portion 26b.
  • the extension part 26b of the reflection sheet 26 is bent at a substantially right angle along the second fold line 26c2, so that the light exiting surface 20b side of the light guide plate 20 described above in the extension part 26b. A site extending to the surface can be formed.
  • FIG. 4 is a cross-sectional view in the vicinity of the opposite side surface 20 d of the light guide plate 20, and shows how light is reflected by the extending portion 26 b of the reflection sheet 26. 4 indicates that the light generated from the LED unit 32 is incident on the light guide plate 20 so as to be substantially orthogonal to the light incident surface 20a of the light guide plate 20, and is opposite to the light guide plate 20. It represents the path of light toward 20d.
  • the light leaked from the opposite side surface 20d of the light guide plate 20 to the outside of the light guide plate 20 is reflected. Reflection is repeated at the extended portion 26 b of the sheet 26 and reflected into the light guide plate 20. That is, as shown in FIG. 4, the light directed toward the opposite side surface 20d along the path indicated by the arrow A leaks from the opposite side surface 20d to the outside of the light guide plate 20, and the extending portion 26b of the reflection sheet 26 facing the opposite side surface 20d. (A path of light at this time is indicated by an arrow B).
  • the light reflected by the extending portion 26b of the reflection sheet 26 is reflected upon being reflected by a portion that contacts the bottom plate 22a of the chassis 22 of the extending portion 26b or a portion that contacts the frame 14 of the extending portion 26b.
  • the light again enters the light (the light path at this time is indicated by an arrow C).
  • the light leaking from the opposite side surface 20d to the outside of the light guide plate 20 is returned to the light guide plate 20 by the extending portion 26b of the reflection sheet 26 and reused.
  • the backlight device 24 As described above, in the backlight device 24 according to the present embodiment, a part of the extended portion 26b of the reflection sheet 26 faces the opposite side surface 20d of the light guide plate 20, so that it is emitted from the LED light source 28 and guided. Of the light that has entered the light plate 20, the light leaked from the opposite side surface 20 d of the light guide plate 20 is reflected by a part of the extending portion 26 b of the reflection sheet 26 and returned to the light guide plate 20 again. For this reason, while realizing the edge light type backlight device 24 in which the LED light source 28 is arranged only in one direction around the side surface of the light guide plate 20, use of light that enters the light guide plate 20 with a simple configuration. Efficiency can be improved.
  • the reflection is performed by a member different from the reflection sheet 26 arranged on the opposite plate surface 20 c side of the light guide plate 20 on the opposite side surface 20 d.
  • a configuration in which a sheet is pasted is known.
  • problems such as an increase in the number of members and a problem such as dropping off of the reflection sheet due to changes over time.
  • the backlight device 24 according to the present embodiment the light leaked out of the light guide plate 20 using a part of the reflection sheet 26 arranged on the opposite plate surface 20c side of the light guide plate 20 is guided by the light guide plate. Therefore, it is not necessary to attach another reflection sheet to the opposite side surface 20d, and the above-described problem can be solved.
  • a first portion that can be bent to the extending portion 26b of the reflection sheet 26 in a direction in which the side plate 22c of the chassis 22 rises (front side direction). Fold line 26c1 is provided.
  • the extension portion 26b of the reflection sheet 26 is bent along the first fold line 26c1 so as to face the opposite side surface 20d of the light guide plate 20 in the extension portion 26b. Can be easily formed.
  • the reflection sheet 26 can be easily bent along the first fold line 26c1.
  • a part of the extending portion 26 b of the reflection sheet 26 faces the entire surface of the opposite side surface 20 d of the light guide plate 20. For this reason, all the light directed to the opposite side surface 20d of the light guide plate 20 can be reflected into the light guide plate 20 by the extending portion 26b of the reflection sheet 26, and the utilization efficiency of the light incident into the light guide plate 20 is improved. Can be further improved.
  • the backlight device 24 further includes a frame 14 disposed along the edge side of the light exit surface 20b of the light guide plate 20.
  • the extended portion 26 b of the reflection sheet 26 has an edge extending toward the light exit surface 20 b of the light guide plate 20 and is sandwiched between the light exit surface 20 b and the frame 14.
  • a second fold line 26 c 2 that can fold a part of the extension part 26 b toward the light exit surface 20 b side of the light guide plate 20 is provided in the extension part 26 b of the reflection sheet 26. It has been. For this reason, in the manufacturing process of the backlight device 24, the extension part 26b of the reflection sheet 26 is bent along the second fold line 26c2, so that the extension part 26b extends toward the light output surface 20b side of the light guide plate 20. Can be easily formed.
  • the reflection sheet 26 can be easily bent along the second fold line 26c2.
  • a part of the extending portion 26b of the reflection sheet 26 faces the opposite side surface 20d in parallel.
  • light that leaks from the opposite side surface 20d of the light guide plate 20 and travels toward the extension portion 26b of the reflection sheet 26 hits the extension portion 26b perpendicularly, so that the light is effectively introduced into the light guide plate 20. Can be reflected.
  • a portion facing the opposite side surface 20d of the extending portion 26b of the reflection sheet 26 in parallel is in contact with the side plate 22c of the chassis 22.
  • the backlight device 24 includes an LED substrate 30 on the surface of which a plurality of LED light sources 28 are arranged.
  • the reflection sheet 26 has an LED substrate side extending portion 26 d extending from the light incident surface 20 a side of the light guide plate 20 to the LED substrate 30 side. Thereby, the light emitted from the LED light source 28 and leaked to the light source substrate side extending portion 26 d is reflected by the LED substrate side extending portion 26 d and returned again into the light guide plate 20. For this reason, the utilization efficiency of the light incident on the light guide plate 20 can be further improved.
  • the tip of the light source substrate side extending portion 26 d of the reflection sheet 26 is in contact with the LED substrate 30. For this reason, when arranging the reflection sheet 26 in the manufacturing process of the backlight device 24, the tip of the light source substrate side extending portion 26d can be brought into contact with the LED substrate 30, and the reflection sheet 26 can be easily positioned. It is said that.
  • FIG. 5 is a cross-sectional view of the liquid crystal display device 110 according to the second embodiment and shows a cross-sectional configuration corresponding to FIG. 3 of the first embodiment.
  • the configuration of the extending portion 126b of the reflection sheet 126 is different from that of the first embodiment. Since other configurations are the same as those of the first embodiment, description of the structure, operation, and effect is omitted.
  • the part obtained by adding the numeral 100 to the reference numeral in FIG. 3 is the same as the part described in the first embodiment.
  • the extending portion 126b of the reflection sheet 126 extends to a portion that contacts the front side tip of the side plate 122c, and this portion is the tip of the extending portion 126b. Even if the extension part 126b of the reflection sheet 126 has such a configuration, a part of the extension part 126b of the reflection sheet 126 faces the opposite side surface 120d of the light guide plate 120. The light leaking from the side surface 120d to the outside of the light guide plate 120 can be reflected to the light guide plate 120 by the extending portion 126b of the reflection sheet 126. For this reason, the utilization efficiency of the light which entered the light guide plate 120 can be improved.
  • a cut is provided along the first fold line 126c1 up to a half depth in the thickness direction of the reflective sheet 126. For this reason, in the manufacturing process of the backlight device 124, the reflection sheet 126 can be easily bent along the first fold 126c1.
  • FIG. 6 is a cross-sectional view of the liquid crystal display device 210 according to the third embodiment, and shows a cross-sectional configuration corresponding to FIG. 3 of the first embodiment.
  • the configuration of the opposite side surface 220d of the light guide plate 220 is different from that of the second embodiment. Since other configurations are the same as those of the first embodiment, description of the structure, operation, and effect is omitted.
  • the part obtained by adding the numeral 100 to the reference numeral in FIG. 5 is the same as the part described in the first embodiment.
  • the extending portion 226b of the reflection sheet 226 extends to a portion that contacts the front end of the side plate 222c, and this portion is the front end of the extending portion 226b. It has become.
  • the opposite side surface 220d of the light guide plate 220 is arranged to extend to the vicinity of the side plate 222c, and the opposite side surface 220d is connected to the opposite side surface 220d of the extending portion 226b. It is in contact with the opposite part.
  • abuts the side plate 222c of the extension part 226b becomes a structure clamped between the said side plate 222c and the opposite side surface 220d.
  • the portion of the extending portion 226b sandwiched between the side plate 222c and the opposite side surface 220d is in contact with the entire surface of the opposite side surface 220d.
  • a part of the extension part 226b of the reflection sheet 226 faces the opposite side surface 220d of the light guide plate 220 even if the extension part 226b of the reflection sheet 226 and the light guide plate 220 have such a configuration.
  • the light leaking from the opposite side surface 220d of the light guide plate 220 to the outside of the light guide plate 220 can be reflected to the light guide plate 220 by the extending portion 226b of the reflection sheet 226. For this reason, the utilization efficiency of the light which entered into the light guide plate 220 can be improved.
  • the portion of the extension portion 226b of the reflection sheet 226 that is in contact with the side plate 222c is sandwiched between the side plate 222c and the opposite side surface 220d, and thus the extension portion 226b.
  • a portion facing the opposite side surface 220d is held by the light guide plate 220 and the chassis 222. For this reason, it can prevent thru
  • the LED light sources 28, 128, and 228 are examples of “light sources”.
  • the chassis 22, 122, and 222 are examples of “accommodating members”.
  • the backlight devices 24, 124, and 224 are examples of “illumination devices”.
  • the frames 14, 114, and 214 are examples of “frame members”.
  • the LED substrate side extending portions 26d, 126d, and 226d are examples of the “light source substrate side extending portion”.
  • the liquid crystal display devices 10, 110, and 210 are examples of the “display device”.
  • the extension part may not be bent along the crease.
  • the extension part may not be provided with a fold, and the extension part may be bent while having a curvature.
  • the configuration in which at least a part of the extension portion of the reflection sheet is in contact with the side plate of the chassis is illustrated, but the extension portion of the reflection sheet is not in contact with the side plate of the chassis. It may be a configuration. Even in such a configuration, if at least a part of the extension portion of the reflection sheet is opposed to the opposite side surface of the light guide plate, the light leaking from the opposite side surface to the outside of the light guide plate is transmitted to the light guide plate by the extension portion. Can be reflected.
  • the configuration in which the reflective sheet has the LED substrate side extending portion that extends from the light incident surface side of the light guide plate is exemplified, but the reflective sheet has the LED substrate side extending portion.
  • the configuration may not be.
  • the shape of the extending portion of the reflecting sheet, the extending mode, the bending mode, and the like can be appropriately changed.
  • a television receiver provided with a tuner has been exemplified.
  • the present invention can also be applied to a display device that does not include a tuner.
  • TV TV receiver, Ca, Cb: cabinet, T: tuner, S: stand, 10, 110, 210: liquid crystal display, 12, 112, 212: bezel, 14, 114, 214: frame, 16, 116, 216: liquid crystal panel, 18, 118, 218: optical member, 20, 120, 220: light guide plate, 20a, 120a, 220a: light incident surface, 20d, 120d, 220d: opposite side surface, 22, 122, 222: chassis, 24, 124, 224: Backlight device, 26, 126, 226: Reflective sheet, 26b, 126b, 226b: Extension part, 28, 128, 228: LED light source, 30, 130, 230: LED substrate, 32, 132 232: LED unit

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

Abstract

Un dispositif de rétro-éclairage (24) se rapportant à cette invention comprend : une plaque de guidage de lumière (20) ayant une surface de lumière incidente (20a) disposée sur un premier côté de celle-ci, une surface latérale opposée (20d) sur le côté opposé à la surface de lumière incidente (20a), une surface d'émission de lumière (20b) disposée sur une première surface de plaque, et une surface de plaque opposée (20c) sur le côté opposé à la surface d'émission de lumière (20b) ; une source de lumière à LED (28) agencée face à la surface de lumière incidente (20a) de la plaque de guidage de lumière (20) ; une feuille réfléchissante (26) agencée sur le côté surface de plaque opposée (20d) de la plaque de guidage de lumière (20) et comportant une section d'extension (26b) qui s'étend depuis le côté surface latérale opposée (20d) de la plaque de guidage de lumière (20) ; et un châssis (22) comportant une plaque de fond (22a) et des plaques latérales (22b, 22c) qui s'élèvent depuis le côté surface de la plaque de fond (22a). Une partie de la section d'extension (26b) de la feuille réfléchissante (26) s'étend dans la direction dans laquelle s'élèvent les plaques latérales (22b, 22c) et est intercalée entre la plaque latérale (22c) et la surface latérale opposée (20d).
PCT/JP2012/052838 2011-02-15 2012-02-08 Dispositif d'éclairage, dispositif d'affichage et dispositif récepteur de télévision WO2012111501A1 (fr)

Applications Claiming Priority (2)

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JP2011-029871 2011-02-15
JP2011029871 2011-02-15

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016031394A1 (fr) * 2014-08-28 2016-03-03 ソニー株式会社 Dispositif d'affichage
CN111983835A (zh) * 2020-08-17 2020-11-24 武汉华星光电技术有限公司 显示装置
WO2021003855A1 (fr) * 2019-07-09 2021-01-14 武汉华星光电技术有限公司 Module de rétroéclairage et dispositif d'affichage
WO2021027105A1 (fr) * 2019-08-14 2021-02-18 武汉华星光电技术有限公司 Module de rétroéclairage et écran d'affichage

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JPH08122535A (ja) * 1994-10-24 1996-05-17 Nissha Printing Co Ltd 面発光装置
JPH09115322A (ja) * 1995-10-21 1997-05-02 Meiji Natl Ind Co Ltd ライトパネル
JP2000057830A (ja) * 1998-06-01 2000-02-25 Jeco Co Ltd 面発光光源装置およびその反射板付導光板の製造方法
JP2002109929A (ja) * 2000-09-28 2002-04-12 Toshiba Corp 平面表示装置
JP2002216522A (ja) * 2001-01-19 2002-08-02 Yuka Denshi Co Ltd 光反射シート及びこれを用いた面光源装置と液晶ディスプレイ装置
JP2003279972A (ja) * 2002-03-20 2003-10-02 Kawaguchiko Seimitsu Co Ltd 液晶表示装置
JP2003346535A (ja) * 2002-03-20 2003-12-05 Advanced Display Inc 面状光源装置及び表示装置
JP2004152597A (ja) * 2002-10-30 2004-05-27 Kawaguchiko Seimitsu Co Ltd バックライト装置

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Publication number Priority date Publication date Assignee Title
JPH08122535A (ja) * 1994-10-24 1996-05-17 Nissha Printing Co Ltd 面発光装置
JPH09115322A (ja) * 1995-10-21 1997-05-02 Meiji Natl Ind Co Ltd ライトパネル
JP2000057830A (ja) * 1998-06-01 2000-02-25 Jeco Co Ltd 面発光光源装置およびその反射板付導光板の製造方法
JP2002109929A (ja) * 2000-09-28 2002-04-12 Toshiba Corp 平面表示装置
JP2002216522A (ja) * 2001-01-19 2002-08-02 Yuka Denshi Co Ltd 光反射シート及びこれを用いた面光源装置と液晶ディスプレイ装置
JP2003279972A (ja) * 2002-03-20 2003-10-02 Kawaguchiko Seimitsu Co Ltd 液晶表示装置
JP2003346535A (ja) * 2002-03-20 2003-12-05 Advanced Display Inc 面状光源装置及び表示装置
JP2004152597A (ja) * 2002-10-30 2004-05-27 Kawaguchiko Seimitsu Co Ltd バックライト装置

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016031394A1 (fr) * 2014-08-28 2016-03-03 ソニー株式会社 Dispositif d'affichage
CN106575493A (zh) * 2014-08-28 2017-04-19 索尼公司 显示装置
JPWO2016031394A1 (ja) * 2014-08-28 2017-06-08 ソニー株式会社 表示装置
US10816837B2 (en) 2014-08-28 2020-10-27 Saturn Licensing Llc Display device
WO2021003855A1 (fr) * 2019-07-09 2021-01-14 武汉华星光电技术有限公司 Module de rétroéclairage et dispositif d'affichage
WO2021027105A1 (fr) * 2019-08-14 2021-02-18 武汉华星光电技术有限公司 Module de rétroéclairage et écran d'affichage
CN111983835A (zh) * 2020-08-17 2020-11-24 武汉华星光电技术有限公司 显示装置

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