WO2012169440A1 - 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
WO2012169440A1
WO2012169440A1 PCT/JP2012/064266 JP2012064266W WO2012169440A1 WO 2012169440 A1 WO2012169440 A1 WO 2012169440A1 JP 2012064266 W JP2012064266 W JP 2012064266W WO 2012169440 A1 WO2012169440 A1 WO 2012169440A1
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WO
WIPO (PCT)
Prior art keywords
light
guide plate
light source
substrate
end surface
Prior art date
Application number
PCT/JP2012/064266
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English (en)
Japanese (ja)
Inventor
良武 石元
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 WO2012169440A1 publication Critical patent/WO2012169440A1/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
    • G02B6/0081—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
    • 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
    • G02B6/0066—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 characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • 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
    • G02B6/009—Positioning aspects of the light source in the package
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side

Definitions

  • the present invention relates to a lighting device, a display device, and a television receiver.
  • liquid crystal panels have been widely used as display units for televisions, mobile phones, portable information terminals and the like. Since the liquid crystal panel cannot emit light by itself, the light of an illumination device (so-called backlight device) is used to display an image.
  • This illuminating device is arranged on the back side of the liquid crystal panel, and is configured to irradiate light spreading in a plane toward the back side of the liquid crystal panel.
  • a device including a light guide plate and an LED light source arranged so as to face an end surface of the light guide plate is known.
  • a plurality of LED light sources are mounted in a state where a plurality of LED light sources are arranged at predetermined intervals on a strip-shaped light source substrate.
  • the light source substrate is arranged along the end surface of the light guide plate such that each LED light source faces the end surface of the light guide plate.
  • This type of lighting device is generally known as a side light type (or edge light type), and the end surface of the light guide plate is a light incident surface on which light emitted from an LED light source is incident.
  • the plate surface (front surface) on the front side of the light guide plate is a light emitting surface that emits light toward the liquid crystal panel.
  • a connector is usually mounted on the light source board together with the LED light source.
  • This connector is mounted on the light source board to relay the supply of current to each LED light source.
  • the connector is configured to be electrically connected to an external wiring or a mating connector provided in another light source board, and is mounted on the end side of the light source board.
  • the portion where the connector is mounted has a lower luminance than the portion where the LED light source is mounted. For this reason, when the light source substrate is disposed so that the portion where the connector is mounted faces the end face of the light guide plate, light hardly enters from the end face portion of the light guide plate facing the connector. As a result, a strip-shaped dark portion extending straight from the end surface portion toward the opposite end surface is formed in the light guide plate. Therefore, even in the light emitted from the front plate surface of the light guide plate, luminance unevenness occurs due to this dark portion, which is a problem.
  • the light source board it is also conceivable to arrange the light source board so that the portion where the connector is mounted protrudes outward along the end face direction of the light guide plate and does not face the end face of the light guide plate.
  • the portion of the light source board where the connector is mounted protrudes outside the light guide plate, the lighting device becomes large, which is a problem.
  • An object of the present invention is to provide a technique capable of suppressing the occurrence of luminance unevenness of a lighting device due to a connector mounted on a light source substrate and reducing the size of the lighting device.
  • An illumination device is a light guide plate that guides light from a plurality of light sources, a connector for relaying current supply to the light sources, and light from the light sources, and is an end surface of the light guide plate.
  • a first end face on which light from the light source is incident to face the light source, a second end face that is one end face of the light guide plate and is arranged in a direction intersecting the first end face, and one plate face of the light guide plate A light source plate having a light exit surface for emitting light incident from the first end surface, and a light source substrate on which the light source and the connector are mounted, facing the first end surface and the plurality of the light source plates.
  • a light source board having a first board part on which the light sources are mounted side by side, and a second board part extending along the surface direction of the second end face and on which the connector is mounted. According to the illuminating device, it is possible to reduce the size of the device while suppressing the occurrence of uneven brightness due to the connector.
  • the second substrate portion of the light source substrate is disposed so as to face the second end surface. According to the illumination device, the size of the device can be further reduced.
  • the light source substrate may include a heat radiating portion on which an end portion of the light guide plate on the first end face side is placed and arranged in parallel to the plate surface of the light guide plate.
  • the light source substrate may be fixed to a heat radiating member.
  • the light source substrate may include a base material made of aluminum.
  • the light source substrate may include a base material made of copper.
  • the light source may be an LED light source.
  • a concavo-convex shape or a lens shape may be formed on any one of the plate surfaces of the light guide plate.
  • the display device includes the illumination device and a display panel that performs display using light from the illumination device.
  • the display panel may be a liquid crystal panel using liquid crystal.
  • a television receiver according to the present invention includes the display device.
  • FIG. 1 is an exploded perspective view showing a schematic configuration of a television receiver according to Embodiment 1 of the present invention.
  • Top view of lighting device Explanatory diagram schematically showing the manufacturing process of LED substrate The top view of the illuminating device which concerns on Embodiment 2.
  • FIG. The top view of the illuminating device which concerns on Embodiment 3.
  • FIG. Explanatory drawing schematically showing other manufacturing process of LED substrate Sectional drawing of the illuminating device provided with the LED board which has a thermal radiation part. Sectional drawing of the illuminating device provided with the LED board currently fixed to the heat radiating member
  • Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 5.
  • the lighting device 12, the liquid crystal display device 10 including the lighting device 12, and the television receiver TV including the liquid crystal display device 10 are illustrated.
  • an X axis, a Y axis, and a Z axis are shown.
  • the upper side shown in FIGS. 2 and 3 is the front side, and the lower side is the back side.
  • FIG. 1 is an exploded perspective view showing a schematic configuration of the television receiver TV according to the first embodiment.
  • the television receiver TV of the present embodiment mainly includes a liquid crystal display device (display device) 10, front and back cabinets Ca and Cb that are stored so as to sandwich the liquid crystal display device 10, and a power source P. And a tuner T and a stand S.
  • the liquid crystal display device 10 is supported by the stand S so that its display surface is along the vertical direction (Y direction).
  • FIG. 2 is an exploded perspective view showing a schematic configuration of the liquid crystal display device 10.
  • FIG. 3 is a cross-sectional view showing a cross-sectional configuration along the short side direction of the liquid crystal display device 10, and
  • FIG. 4 is a plan view of the illumination device 12.
  • the liquid crystal display device 10 has a horizontally long rectangular shape when viewed from the front side, and includes a liquid crystal panel (display panel) 11 and a back surface 11 b side of the liquid crystal panel 11. And a frame-shaped bezel 13 that covers the front side (display surface 11a side) of the liquid crystal panel 11. These are integrally held by attaching the bezel 13 or the like to the lighting device 12.
  • the bezel 13 is made of a metal material or the like.
  • the liquid crystal panel 11 has a horizontally long rectangular shape when viewed from the front side.
  • the liquid crystal panel 11 mainly includes a pair of transparent glass substrates facing each other and a liquid crystal layer sealed between these substrates.
  • one glass substrate disposed on the back surface 11b side (back side) is a so-called thin film transistor (hereinafter, TFT) array substrate, and the other glass substrate disposed on the display surface 11a side (front side).
  • TFT thin film transistor
  • CF color filter
  • the TFT array substrate is mainly composed of a plurality of TFTs as switching elements and a plurality of transparent pixel electrodes connected to the drain electrodes of each TFT in a matrix (matrix) on a transparent glass plate. It consists of what is provided. Individual TFTs and pixel electrodes are provided for each pixel, and are partitioned by a plurality of gate wirings and a plurality of source wirings provided on the glass plate so as to cross each other. . Note that the gate electrode in each TFT is connected to the gate wiring, and the source electrodes thereof are connected to the source wiring.
  • the CF substrate is mainly formed on a transparent glass plate so that the CF composed of each color such as red (R), green (G), and blue (B) corresponds to each pixel of the TFT array substrate. It consists of what was provided in matrix form. Each CF is partitioned by a light-shielding black matrix (BM) provided in a lattice pattern on the glass plate. A transparent counter electrode or the like facing the pixel electrode of the TFT array substrate is provided on the CF and the BM.
  • BM light-shielding black matrix
  • the liquid crystal panel 11 is configured to supply image data and various control signals necessary for displaying an image from the drive circuit substrate to the above-described source wiring, gate wiring, counter electrode, and the like. Drives in a matrix system.
  • the liquid crystal panel 11 is provided with polarizing plates on the display surface 11a side and the back surface 11b side so as to sandwich the pair of glass substrates.
  • the illuminating device 12 is a so-called edge light type (side light type), and mainly includes a chassis (housing member) 14, an optical sheet 15, an LED light source (light source) 16, an LED substrate (light source substrate) 17, A connector 18, a light guide plate 19, a reflection sheet 20, and a frame 21 are provided.
  • the chassis 14 is formed of a shallow box having an upper opening, and is formed by pressing a plate material made of a metal material such as an aluminum material.
  • the chassis 14 has a horizontally long floor 14a when viewed from the front side, a pair of walls 14b erected on the edge of the long side of the floor 14a, and the short side of the floor 14a. And a pair of walls 14c erected on the edges.
  • the reflective sheet 20 has a horizontally long rectangular shape when viewed from the front side, and is made of a white foamed plastic sheet (for example, a foamed polyethylene terephthalate sheet).
  • the reflection sheet 20 is accommodated in the box-shaped chassis 14 so as to cover the floor 14a.
  • the LED light source 16 is composed of a plurality of LED chips, which are light emitting elements, sealed in a housing with a resin material or the like (so-called LED package), and is configured to emit white light.
  • the LED light source 16 includes three types of LED chips having different main emission wavelengths. Specifically, each LED chip has red (R), green (G), and blue (B). It is configured to emit monochromatic light.
  • the LED light source 16 is not limited to such a configuration, and may have another configuration. Other configurations of the LED light source 16 include, for example, a built-in LED chip that emits blue (B) in a single color, a phosphor having an emission peak in the red (R) region, and an emission peak in the green (G) region.
  • the LED chip may be covered with a resin (for example, a silicon-based resin) mixed with a phosphor having the above. Further, as another configuration, a resin (for example, a silicon-based resin) in which an LED chip that emits blue (B) in a single color is incorporated and a phosphor that emits yellow light such as YAG (yttrium, aluminum, garnet) phosphor is mixed. ), The LED chip may be covered.
  • a resin for example, a silicon-based resin
  • a resin for example, a silicon-based resin in which an LED chip that emits blue (B) in a single color is incorporated and a phosphor that emits yellow light such as YAG (yttrium, aluminum, garnet) phosphor is mixed.
  • the LED substrate (light source substrate) 17 includes a strip-shaped first substrate portion 171 extending along the long side direction (X-axis direction) of the chassis 14 and the short side of the chassis 14. And a belt-like second substrate portion extending along the direction (Y-axis direction).
  • the first substrate unit 171 is sufficiently longer than the second substrate unit 172.
  • the first substrate portion 171 and the second substrate portion 172 are connected in a row, and these intersect at a substantially right angle.
  • the LED substrate 17 has a shape in which a single elongated strip-like substrate (original substrate described later) is bent at a substantially right angle in the middle thereof.
  • the LED substrate 17 includes an elongated base material made of a metal material such as an aluminum-based material (for example, aluminum or an aluminum alloy) or copper, and an insulating layer made of a synthetic resin formed on the base material. And a wiring pattern made of a metal film such as a copper foil formed on the insulating layer, and a reflective layer made of a white insulating film formed on the insulating layer so as to cover the wiring pattern.
  • a metal film such as a copper foil formed on the insulating layer
  • a reflective layer made of a white insulating film formed on the insulating layer so as to cover the wiring pattern.
  • the base material made of the metal material has moderate rigidity and excellent heat dissipation.
  • a plurality of the LED light sources 16 are surface-mounted on the front plate surface 171a of the first substrate portion 171 in a state of being arranged in a line at a predetermined interval. Various conditions such as the number of LED light sources 16 mounted on the first substrate unit 171 and the interval between the LED light sources 16 are appropriately set.
  • a connector 18 for relaying current supply to each LED light source 16 is mounted on the front surface 172a of the second substrate portion 172.
  • a wiring pattern (not shown) is formed on the LED substrate 17 as described above, and the LED light sources 16 on the first substrate unit 171 are connected in series by this wiring pattern.
  • the second substrate portion 172 is formed with an end portion on the anode side (+ side) and an end portion on the cathode side ( ⁇ side) of the wiring pattern.
  • the connector 18 mainly includes a housing 18a made of insulating synthetic resin and two terminal fittings (not shown) housed in the housing 18a.
  • the external shape of the housing 18a is generally a rectangular parallelepiped, and has a box shape with one surface opened.
  • a mating connector (not shown) is inserted into the opened portion.
  • the mating connector is inserted from the direction of the arrow M along the Y-axis direction shown in FIG. This mating connector is provided at the tip of a predetermined electric wire.
  • One of the terminal fittings is on the power source side, and is connected to an external drive control circuit (not shown) that supplies power and control signals necessary for lighting each LED light source 16 via the counterpart connector.
  • the rear end portion of the terminal fitting on the power source side is connected to the end portion on the anode side of the wiring pattern.
  • the other terminal fitting is on the ground side and is grounded via the mating connector. Note that a rear end portion of the terminal fitting on the ground side is connected to an end portion on the cathode side of the wiring pattern.
  • FIG. 5 is an explanatory view schematically showing the manufacturing process of the LED substrate 17.
  • the LED substrate 17 of the present embodiment is manufactured by preparing a straight LED substrate (hereinafter referred to as an original substrate) and bending the original substrate at a predetermined location by approximately 90 °.
  • the light guide plate 19 is a horizontally long rectangular shape in a plan view and is made of a plate-like member having a predetermined thickness, like the liquid crystal panel 11 and the chassis 14.
  • the light guide plate 19 is manufactured from a synthetic resin material having a refractive index higher than air and substantially transparent (for example, an acrylic resin such as PMMA or polycarbonate).
  • the light guide plate 19 includes a front side plate surface 19a, a back side plate surface 19b, two end surfaces (first end surface) 19c on the long side, and two end surfaces (second end surface) 19d on the short side. ing.
  • the end surface 19c and the end surface 19d are set so as to intersect substantially perpendicularly.
  • the end surface 19d is arranged in a direction intersecting the end surface 19c.
  • the light guide plate 19 is accommodated in the chassis 14 so that the back surface 19b of the light guide plate 19 faces the floor 14a with the reflection sheet 20 interposed therebetween.
  • a plurality of locking pins (not shown) are erected on the floor 14 a, and the locking pins are inserted into the light guide plate 19 from the back plate surface 19 b, so that the light guide plate 19 is placed in the chassis 14. It is positioned.
  • the chassis 14 there is a gap between one end surface 19 c on the long side of the light guide plate 19 and the wall 14 b, and the first board of the LED board 17 is in this gap.
  • Part 171 is installed.
  • the first substrate portion 171 is disposed in the chassis 14 so that the LED light source 16 mounted on the front plate surface 171 a faces the end surface 19 c of the light guide plate 19.
  • a plate surface 171b on the back side of the first substrate portion 171 is attached to the wall 14b.
  • the second substrate portion 172 is disposed in the chassis 14 so that the connector 18 (housing 18a) mounted on the front plate surface 172a faces the end surface 19d of the light guide plate 19.
  • FIG. 4 shows the lighting device 12 with the optical sheet 15 and the frame 21 removed.
  • the first substrate portion 171 extends along the surface direction (X-axis direction) of the end surface 19 c of the light guide plate 19, and the second substrate portion 172 is the end surface 19 d of the light guide plate 19. In the surface direction (Y-axis direction).
  • the end face 19c of the light guide plate 18 facing the LED light source 16 is a light incident surface on which light emitted from the LED light source 16 is incident.
  • a front surface (surface) 19 a of the light guide plate 19 is a light emitting surface, and light incident from one end surface 19 c serving as a light incident surface is disposed above the light guide plate 19. The light is emitted toward the optical sheet 15 and the liquid crystal panel 11.
  • a plate surface (back surface) 19 b on the back side of the light guide plate 19 faces the floor 14 a while being covered with the reflection sheet 20.
  • the reflection sheet 20 that covers the plate surface 19b of the light guide plate 19 reflects the light incident on the inside of the light guide plate 19 from the end surface 19c serving as a light incident surface, and the front plate surface (light emitting surface 19a).
  • a reflection portion that reflects light in the light guide plate 19 or a scattering portion that scatters has a predetermined in-plane distribution.
  • the light emitted from the plate surface (light emitting surface) 19a is adjusted so as to have a uniform distribution in the surface.
  • the optical sheet 15 has a horizontally long rectangular shape when viewed from the front side, like the liquid crystal panel 11 and the like.
  • the optical sheet 15 has a diffusion sheet 15a, a lens sheet 15b, and a reflective polarizing plate. It consists of a laminate of sheets 15c.
  • the optical sheet 15 is placed on the plate surface 19 a so as to cover the front plate surface (light emitting surface) 19 a of the light guide plate 19.
  • the size of the optical sheet 15 is set to be approximately the same as the size of the plate surface 19 a of the light guide plate 19.
  • the frame 21 is a frame-like (frame-like) member along the periphery of the liquid crystal panel 11 and the light guide plate 19 and is made of synthetic resin or the like.
  • the frame 21 is black and has a light shielding property.
  • the frame 21 presses the end of the light guide plate 19 from the front side over substantially the entire circumference.
  • the frame 21 is covered from the upper end side of each wall 14b, 14c of the chassis 14 housing the light guide plate 19 and the like.
  • the frame 21 is fixed to the walls 14b and 14c of the chassis 14 by fixing means (not shown) such as screws.
  • the peripheral edge of the liquid crystal panel 11 is placed on the inner peripheral edge of the frame 21.
  • the liquid crystal panel 11 is attached to the chassis 14 with its peripheral edge sandwiched between the frame 21 and the above-described bezel 13 covered from the front side of the frame 21.
  • the bezel 13 is fixed to the walls 14b and 14c of the chassis 14 together with the frame 21 and the like by fixing means such as screws.
  • each LED light source 16 on the LED substrate 17 included in the illumination device 12 emits light (lights up).
  • each LED light source 16 emits light light enters the light guide plate 19 from one end face (light incident surface) 19 c of the light guide plate 19.
  • the incident light is reflected by the reflecting sheet 20 laid on the back side of the light guide plate 19, the reflecting portion formed on the back surface 19 b or the front surface 19 a of the light guide plate 19, and the like while traveling through the light guide plate 19.
  • the light is emitted from the front side plate surface (light emitting surface) 19a.
  • the light emitted from the plate surface 19a passes through the optical sheet 15 and spreads into a planar shape, and illuminates the liquid crystal panel 11 from the back surface 11b.
  • the liquid crystal panel 11 displays an image on the display surface 11a using the light from the illumination device 12.
  • FIG. The second board part 172 on which the connector 18 is mounted is arranged so as to face one end face 19 d on the short side of the light guide plate 19. Since the LED light source 16 is not mounted on the second substrate portion 172, even if the second substrate portion 172 is opposed to the light incident surface 19c, the light incident surface 19c of the opposed portion is substantially free of light. Is not incident. Therefore, as in this embodiment, the second substrate portion 172 is disposed so as to face the end surface 19d that is not the light incident surface 19c.
  • the light incident surface 19c is configured to be sufficiently irradiated with light from each LED light source 16 mounted on the first substrate unit 171. Therefore, in the illuminating device 12, the dark part resulting from the connector 18 mounted on the LED board 17 is not formed in the light guide plate 19, and generation
  • the second substrate portion 172 is disposed between the end surface 19d and the wall 14c so as to be along the surface direction of the end surface 19d. That is, the frame area of the lighting device 12 can be set narrower than in the case where the second substrate unit 172 is arranged along the surface direction of the light incident surface 19c, similarly to the first substrate unit 171.
  • the frame region referred to here is a region (interval) formed between the end surface 19d on the short side of the light guide plate 19 and the wall 14c of the chassis 14 facing the end surface 19d.
  • the illuminating device 12 of the present embodiment can suppress the occurrence of uneven brightness due to the connector 18 mounted on the LED substrate 17 and can reduce the size (narrow frame) of the device.
  • the liquid crystal display device 10 including the illumination device 12 and the television receiver TV including the liquid crystal display device 10 can similarly suppress the occurrence of luminance unevenness due to the connector 18 and reduce the size (narrowness) of the device. Frame).
  • Embodiment 2 of the present invention will be described with reference to FIG.
  • the same parts as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and detailed description thereof is omitted.
  • FIG. 6 is a plan view of the illumination device 12A according to the second embodiment.
  • the basic configuration of the illumination device 12A of the present embodiment is the same as that of the first embodiment.
  • FIG. 6 shows the illumination device 12A in a state where the optical sheet, the frame, and the like are removed.
  • the LED substrate (light source substrate) 17A included in the illumination device 12A is different in appearance from that of the first embodiment.
  • the LED substrate 17A includes a first substrate portion 171A extending along the surface direction (X-axis direction) of the end surface 19c of the light guide plate 19 and the surface direction (Y-axis direction) of the end surface 19d.
  • the second substrate portion 172A extends.
  • the second substrate portion 172A of the LED substrate 17A extends in the opposite direction to that of the first embodiment.
  • a plurality of LED light sources 16 are mounted in a state of being arranged at predetermined intervals on the front plate surface 171Aa of the first substrate portion 171A.
  • a connector 18 is mounted on the front plate surface 172Aa of the second substrate portion 172A.
  • the basic configuration of this connector 18 is the same as that of the first embodiment, and the direction in which the mating connector (not shown) is inserted is set to the direction of arrow N shown in FIG. .
  • the front-side plate surface 171Aa of the first substrate portion 171A is disposed in the chassis 14 so as to face the end surface 19c of the light guide plate 19, and the back-side plate surface 171Ab faces the wall 14b. Further, the front-side plate surface 172Aa in the second substrate portion 172A is disposed in the chassis 14 so as to face one wall 14c, and the back-side plate surface 172Ab faces the other wall 14c.
  • the LED substrate 17A is supported in a state in which a predetermined posture is maintained in the chassis 14 by a support member (not shown) standing on the floor 14a.
  • the first substrate portion 171A on which the LED light source 16 is mounted faces one end surface (light incident surface) 19c on the long side of the light guide plate 19.
  • the second board part 172A on which the connector 18 is mounted faces the wall 14c so as not to face the end face 19c of the light guide plate 19. Accordingly, in the illumination device 12A of the present embodiment, similarly to the first embodiment, the occurrence of luminance unevenness due to the connector 18 mounted on the LED board 17A is suppressed.
  • the second substrate portion 172A is disposed between the end surface 19d and the wall 14c so as to be along the surface direction of the end surface 19d. That is, also in the present embodiment, the frame area of the lighting device 12A can be set narrow as in the first embodiment.
  • region here is an area
  • interval formed between the end surface 19c of the light-guide plate 19 in this embodiment and the wall 14b is large (wide) compared with the thing of Embodiment 1.
  • at least the gap (region) formed between the end surface 19d of the light guide plate 19 and the wall 14a can be set narrow as in the first embodiment.
  • FIG. 7 is a plan view of the illumination device 12B according to the third embodiment.
  • the basic configuration of the illumination device 12B of the present embodiment is the same as that of the first embodiment.
  • FIG. 7 shows the illumination device 12B in a state where the optical sheet, the frame, and the like are removed.
  • the illuminating device 12B is different from that of the first embodiment in that the two end surfaces 19c on the long side of the light guide plate 19 are respectively light incident surfaces.
  • the lighting device 12B includes two LED substrates 17.
  • the LED boards 17 are set to have the same size, and are arranged in the chassis 14 so as to face each other through the light guide plate 19.
  • the first substrate portion 171 of each LED substrate 17 is arranged along the end surface 19c on the long side, and the second substrate portion 172 of each LED substrate 17 is along the end surface 10d on the short side. It is arranged.
  • the LED light source 16 on the first substrate portion 171 faces the end surface 19c, and the connector 18 on the second substrate portion 172 faces the end surface 19d.
  • a plurality of LED substrates 17 may be used for one light guide plate 19 as in the illumination device 12B of the present embodiment.
  • the occurrence of uneven brightness due to the connector 18 mounted on the LED substrate 17 is suppressed as in the first embodiment.
  • the second substrate portion 172 is disposed between the end surface 19d and the wall 14c so as to be along the surface direction of the end surface 19d. That is, the frame area of the lighting device 12 can be set narrower than in the case where the second substrate unit 172 is arranged along the surface direction of the light incident surface 19c, similarly to the first substrate unit 171.
  • the frame region referred to here is a region formed between the end surface 19d on the short side of the light guide plate 19 and the wall 14c of the chassis 14 facing the end surface 19d.
  • the connector 18 is mounted only on one end of the LED board 17.
  • the connector 18 is mounted on both ends of the LED board 17. May be.
  • the LED substrate 17 is provided with the second substrate portion 172 at both ends of the first substrate portion 171.
  • an uneven shape or a lens shape may be formed on the plate surface of the light guide plate.
  • the uneven shape or the lens shape is formed on the plate surface of the light guide plate, generally, the straightness of the light emitted from the LED light source in the light guide plate is high. Therefore, in an illuminating device provided with such a light guide plate, it is particularly desired to suppress the occurrence of luminance unevenness due to the connector mounted on the LED substrate.
  • the connector 18 is mounted on the front plate surface 172a of the second substrate portion 172. In other embodiments, the connector 18 is mounted on the back plate surface 172b. May be. That is, the LED substrate 17 may be a so-called double-sided mounting substrate.
  • the insertion direction of the mating connector with respect to the connector 18 is set to be the same as the surface direction of the end surface 19d of the light guide plate 19 (see arrow M in FIG. 4).
  • the embodiment there is no particular limitation, and it is appropriately set according to the purpose.
  • the LED light sources 16 mounted on the LED substrate 17 are connected in series with each other by a wiring pattern.
  • the LED light sources 16 are wired.
  • the patterns may be connected in parallel to each other.
  • the LED substrate 17 is formed by bending the original substrate as shown in FIG.
  • a first substrate portion 171 and a second substrate portion 172 are prepared separately in advance, and these are connected to each other to connect the LED substrate 17. It may be manufactured. Note that wiring patterns and the like are appropriately formed on the first substrate portion 171 and the second substrate portion 172, and these wiring patterns and the like are also connected to each other.
  • the color of the connector 18 in the housing 18a may be white.
  • the LED substrate 17B may be configured to include a heat dissipation portion 173B in order to improve heat dissipation.
  • FIG. 9 is a cross-sectional view of an illuminating device 12B including an LED substrate 17B having a heat radiating portion 173B. Further, FIG. 9 shows a liquid crystal display device 10B provided with the illumination device 12B, and a cross-sectional configuration along the short side direction of the liquid crystal display device 10B is shown.
  • the LED substrate 17B includes a first substrate portion 171B extending along the surface direction (X-axis direction) of the end surface 19c on the long side of the light guide plate 19 and the short side of the light guide plate 19 as in the above-described embodiments.
  • the LED substrate 17B includes a plate-like heat radiation portion 173B on which the end portion of the light guide plate 19 on the end surface 19c side is placed and which is arranged in parallel to the plate surface 19b on the back side of the light guide plate 19. Yes.
  • the heat radiating portion 173B is extended to the lower end portion of the first substrate portion 171B, and is provided at a substantially right angle to the first substrate portion 171B.
  • the end of the reflection sheet 20 is also placed on the heat radiating part 173B.
  • the heat dissipation part 173B is made of a part of a base material made of a metal material (for example, aluminum) provided in the LED substrate 17B.
  • the illuminating device 12B includes two LED substrates 17B, which are arranged so that the LED light sources 16 face the two long side end surfaces 19c of the light guide plate 19, respectively.
  • a plurality of convex portions 14 d are provided on the floor 14 a of the chassis 14.
  • the light guide plate 19 is supported in the chassis 14 by the convex portions 14d.
  • the LED substrate 17B may be configured to include the heat radiating portion 173B.
  • FIG. 10 is a cross-sectional view of an illuminating device 12 ⁇ / b> C provided with an LED substrate 17 ⁇ / b> C fixed to the heat dissipation member 22.
  • FIG. 10 shows a liquid crystal display device 10 ⁇ / b> C provided with the illumination device 12 ⁇ / b> C, and shows a cross-sectional configuration along the short side direction of the liquid crystal display device 10 ⁇ / b> C.
  • the LED substrate 17C includes a first substrate portion 171C extending along the surface direction (X-axis direction) of the end surface 19c on the long side of the light guide plate 19, and a short side of the light guide plate 19. And a second substrate portion (not shown) extending along the surface direction (Y-axis direction) of the end face (not shown).
  • the LED substrate 17 ⁇ / b> C is fixed to a heat radiating member 20 having an L-shaped cross section.
  • the heat radiating member 22 includes a plate-like standing portion 221 disposed along the wall 14b, and a plate-like mounting portion 222 that extends to the lower end portion of the standing portion 221 and is disposed along the floor 14a. Consists of.
  • the upright part 221 and the mounting part 222 cross each other substantially perpendicularly.
  • the heat radiating member 22 is formed by bending and processing a plate-like member made of a metal material such as aluminum or copper.
  • the LED board 17 ⁇ / b> C is fixed to the standing part 221 of the heat radiating member 22.
  • the LED substrate 17C is attached to the standing portion 221 via a fixing means such as a screw or an adhesive layer.
  • the end portion of the light guide plate 19 on the end face 19 c side is placed on the placement portion 222 of the heat dissipation member 22.
  • the end portion of the reflection sheet 20 is also placed on the placement portion 222.
  • the illuminating device 12C includes two LED substrates 17C, which are fixed to the heat radiation member 22 so that the LED light sources 16 face the two long side end surfaces 19c of the light guide plate 19, respectively. It is arranged with.
  • a plurality of convex portions 14 d are provided on the floor 14 a of the chassis 14.
  • the light guide plate 19 is supported in the chassis 14 by the convex portions 14d.

Landscapes

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

Abstract

Le dispositif d'éclairage de l'invention est équipé d'une plaque de guidage de lumière (19) qui guide une lumière en provenance de sources lumineuses (16), et qui possède : une première face extrémité (19c) qui constitue une des faces extrémité de la plaque de guidage de lumière (19), qui s'oppose aux sources lumineuses (16), et qui reçoit en incidence la lumière en provenance de ces dernières; une seconde face extrémité (19d) qui constitue une des faces extrémité de la plaque de guidage de lumière (19), et qui est placée dans une direction croisant la première face extrémité (19c); et une face émission de lumière (19a) qui constitue une des faces plaque de la plaque de guidage de lumière (19), et qui émet en sortie la lumière incidente par la première face extrémité (19c). Le dispositif d'éclairage de l'invention est également équipé d'un substrat de sources lumineuses (17) sur lequel les sources lumineuses (16) et un connecteur (18) sont montés, et qui possède : une première partie substrat (171) qui s'oppose à la première face extrémité (19c), et sur laquelle la pluralité de sources lumineuses (16) est montée en rang; et une seconde partie substrat (172) qui s'étend suivant la direction faciale de la seconde face extrémité (19d), et sur laquelle le connecteur (18) est monté.
PCT/JP2012/064266 2011-06-09 2012-06-01 Dispositif d'éclairage, dispositif d'affichage, et dispositif de réception de télévision WO2012169440A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-129379 2011-06-09
JP2011129379 2011-06-09

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WO2012169440A1 true WO2012169440A1 (fr) 2012-12-13

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103486503A (zh) * 2013-09-27 2014-01-01 上海向隆电子科技有限公司 导光装置
JP2014170079A (ja) * 2013-03-01 2014-09-18 Funai Electric Co Ltd 表示装置
KR20150002046A (ko) * 2013-06-28 2015-01-07 엘지이노텍 주식회사 회로기판 및 상기 회로기판을 포함하는 조명장치

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Publication number Priority date Publication date Assignee Title
JP2007258089A (ja) * 2006-03-24 2007-10-04 Toshiba Lighting & Technology Corp 光源装置及び表示装置
JP2009199871A (ja) * 2008-02-21 2009-09-03 Mitsubishi Electric Corp 面状光源装置、及び面状光源装置を用いた表示装置
JP2010080401A (ja) * 2008-09-29 2010-04-08 Fujifilm Corp 面状照明装置
JP2010192433A (ja) * 2009-01-22 2010-09-02 Hitachi Consumer Electronics Co Ltd バックライトユニットおよびそれを用いた液晶表示装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007258089A (ja) * 2006-03-24 2007-10-04 Toshiba Lighting & Technology Corp 光源装置及び表示装置
JP2009199871A (ja) * 2008-02-21 2009-09-03 Mitsubishi Electric Corp 面状光源装置、及び面状光源装置を用いた表示装置
JP2010080401A (ja) * 2008-09-29 2010-04-08 Fujifilm Corp 面状照明装置
JP2010192433A (ja) * 2009-01-22 2010-09-02 Hitachi Consumer Electronics Co Ltd バックライトユニットおよびそれを用いた液晶表示装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014170079A (ja) * 2013-03-01 2014-09-18 Funai Electric Co Ltd 表示装置
KR20150002046A (ko) * 2013-06-28 2015-01-07 엘지이노텍 주식회사 회로기판 및 상기 회로기판을 포함하는 조명장치
JP2015011994A (ja) * 2013-06-28 2015-01-19 エルジー イノテック カンパニー リミテッド 回路基板及び回路基板を含む照明装置
KR102133889B1 (ko) * 2013-06-28 2020-07-14 엘지이노텍 주식회사 회로기판 및 상기 회로기판을 포함하는 조명장치
CN103486503A (zh) * 2013-09-27 2014-01-01 上海向隆电子科技有限公司 导光装置

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