WO2013018646A1 - Dispositif d'éclairage, dispositif d'affichage et dispositif de réception de la télévision - Google Patents

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

Info

Publication number
WO2013018646A1
WO2013018646A1 PCT/JP2012/068948 JP2012068948W WO2013018646A1 WO 2013018646 A1 WO2013018646 A1 WO 2013018646A1 JP 2012068948 W JP2012068948 W JP 2012068948W WO 2013018646 A1 WO2013018646 A1 WO 2013018646A1
Authority
WO
WIPO (PCT)
Prior art keywords
bottom plate
led
light source
spacer
chassis
Prior art date
Application number
PCT/JP2012/068948
Other languages
English (en)
Japanese (ja)
Inventor
亮 山川
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 WO2013018646A1 publication Critical patent/WO2013018646A1/fr

Links

Images

Classifications

    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/66—Transforming electric information into light information
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs

Definitions

  • the present invention relates to a lighting device, a display device, and a television receiver.
  • a backlight device is separately required as a lighting device.
  • the backlight device is installed on the back side of the liquid crystal panel (the side opposite to the display surface).
  • the liquid crystal panel side surface is open, a light source accommodated in the chassis, a light source,
  • An optical member (such as a diffusion sheet) that is disposed so as to cover the opening of the chassis so as to face the light and efficiently emits light emitted from the light source to the liquid crystal panel side.
  • an LED may be used as a light source.
  • an LED substrate on which the LED is mounted is accommodated in the chassis.
  • what was described in following patent document 1 is known as an example of the backlight apparatus which used LED as a light source.
  • the chassis that constitutes the backlight device has a bottom plate on which the LED substrate is arranged on the inner surface side.
  • the power source is placed in a posture in which the outer surface of the bottom plate is vertically upward.
  • Mounting parts such as a board and a stand are attached.
  • the bottom plate of the chassis becomes larger as the liquid crystal display device and the backlight device are increased in size, and tends to bend and warp more easily.
  • the chassis thickness including the bottom plate may be reduced, and in this case, the bottom plate is more likely to be bent or warped. For this reason, when performing the mounting operation of the mounting component described above, the bottom plate may be warped and deformed inward due to its own weight or the weight of the LED substrate, which makes it difficult to mount the mounting component. It was.
  • the present invention has been completed based on the above-described circumstances, and an object thereof is to solve a problem caused by deformation occurring in a bottom plate of a chassis.
  • the illuminating device of the present invention accommodates a plurality of light sources and a plurality of the light sources, and the plurality of light sources are arranged side by side from an end portion to a central portion, and the central portion is more than the end portion.
  • a chassis having a bottom plate that protrudes on the side opposite to the light source side, a mounting part that is attached to a surface of the bottom plate opposite to the surface facing the light source side, the light source, and the bottom plate And a spacer arranged such that a distance between the light source and the bottom plate is relatively larger on the central portion side than on the end portion side.
  • the chassis When attaching a mounting part to the chassis, for example, the chassis is in a posture in which the surface opposite to the surface facing the light source side of the bottom plate is the upper side in the vertical direction.
  • the bottom plate is deformed by its own weight or the weight of the light source, and the center part is vertically downward from the end part, that is, largely displaced toward the light source side. Since it is configured to protrude to the side opposite to the side, it is difficult for a difference in position in the vertical direction between the central portion and the end portion. Thereby, since the flatness of the whole in a bottom plate is kept favorable, the operation
  • the bottom plate has a configuration in which the center portion protrudes to the side opposite to the light source side from the end portion. Therefore, if a plurality of light sources are arranged along the light source side surface of the bottom plate, There will be a difference in position between the light source arranged on the center side and the light source arranged on the end side as much as the center part protrudes, and then the light emitted from each light source will be outside the lighting device. There is a possibility that unevenness occurs when the light is emitted.
  • the spacer is interposed between the light source and the bottom plate so that the distance between the light source and the bottom plate is relatively larger on the center side than on the end side on the bottom plate. The difference in position as described above is unlikely to occur between the light source arranged on the center side and the light source arranged on the end side. Thereby, unevenness is less likely to occur when light emitted from each light source is emitted outside the illumination device.
  • the bottom plate has, on the light source side, an inclined surface that is inclined from the end side toward the central portion side, and the spacer has a distance between the light source and the bottom plate, It is formed so as to gradually increase from the end side toward the center side.
  • the spacer since the distance between the light source and the bottom plate maintained by the spacer can be changed gently according to the inclination angle of the inclined surface, the light source arranged on the center side and the end side are arranged.
  • the difference in position that can occur when the central portion protrudes is more favorably mitigated by the light source. Thereby, unevenness is less likely to occur when light emitted from each light source is emitted outside the illumination device.
  • the bottom plate has a pair of the inclined surfaces and the pair of inclined surfaces are continuous at the central portion, so that the entire cross-sectional shape is substantially V-shaped. In this way, when attaching the attachment component to the bottom plate, the overall flatness of the bottom plate can be made better, so that the attachment operation of the attachment component can be made easier.
  • the spacer is formed such that the optical axes of the plurality of light sources are parallel to each other. In this way, unevenness is less likely to occur when light emitted from a plurality of light sources is emitted outside the illumination device.
  • the “optical axis” is an axis that coincides with the traveling direction of light having the highest emission intensity among the emitted light from the light source.
  • the spacer is formed such that the light emitting surfaces of the plurality of light sources are flush with each other. In this way, unevenness is less likely to occur when the light emitted from the light emitting surfaces of the plurality of light sources is emitted outside the illumination device.
  • the bottom plate has a rectangular shape when seen in a plan view, and a central portion in the long side direction protrudes on the opposite side to the light source side rather than both end portions in the long side direction. .
  • the bottom plate having a rectangular shape when viewed in plan is more deformed in the long side direction than in the short side direction when the mounting part is attached.
  • a light source substrate on which a plurality of the light sources are mounted is provided, and the spacer is interposed between a surface of the light source substrate opposite to a mounting surface on which the light source is mounted and the bottom plate. It is arranged in a form.
  • the spacer allows the distance between the light source mounted on the mounting surface of the light source substrate and the bottom plate to be relatively larger on the center side than on the end side of the bottom plate. The difference in position that can occur as the central portion protrudes is more appropriately mitigated between the light source arranged on the side and the light source arranged on the end side. As a result, unevenness is less likely to occur when light emitted from each light source mounted on the light source substrate is emitted outside the illumination device.
  • a plurality of the light source substrates are arranged side by side from the end portion to the center portion of the bottom plate, and the spacer includes a surface of the light source substrate opposite to the mounting surface and the bottom plate. Is arranged so as to be relatively larger on the central portion side than on the end portion side. If it does in this way, it will be hard to produce the difference of the position which may arise with a spacer projecting from a light source substrate arranged at the central part side and a light source board arranged at the end part side by a spacer. It has become. Thereby, when light emitted from each light source mounted on the plurality of light source substrates is emitted outside the illumination device, unevenness is less likely to occur.
  • the spacer is formed so that the mounting surfaces of the light source substrate are flush with each other. If it does in this way, when light emitted from each light source mounted in a plurality of light source boards is emitted outside the lighting device, it will become difficult to produce unevenness.
  • the spacer is individually arranged for each of the plurality of light source substrates. In this way, the positional relationship between the surface of the light source substrate opposite to the mounting surface and the bottom plate is more finely adjusted than when the spacer extends over a plurality of light source substrates. can do.
  • the spacer is integrally formed so as to protrude from the surface of the bottom plate facing the light source to the light source. In this way, since the spacer is integrally formed on the bottom plate, it is suitable for reducing the manufacturing cost.
  • the spacer is a separate component from the bottom plate and is attached to the bottom plate. In this way, there is a high degree of freedom in changing the material and shape of the spacer, for example.
  • a display device of the present invention includes the above-described illumination device and a display panel that performs display using light from the illumination device.
  • the illumination device that supplies light to the display panel is less likely to cause unevenness when the light emitted from each light source is emitted outside the illumination device.
  • An excellent display can be realized.
  • a liquid crystal panel can be exemplified as the display panel.
  • Such a display device can be applied as a liquid crystal display device to various uses such as a display of a television or a personal computer, and is particularly suitable for a large screen.
  • FIG. 1 is an exploded perspective view showing a schematic configuration of a television receiver according to Embodiment 1 of the present invention. Exploded perspective view showing schematic configuration of liquid crystal display device
  • the top view which shows the arrangement structure of the chassis, LED board, and reflective sheet in the backlight apparatus with which a liquid crystal display device is equipped.
  • the bottom view which shows the arrangement structure of the chassis and each attachment component in the backlight apparatus with which a liquid crystal display device is equipped
  • V-v cross-sectional view of FIGS. 3 and 4 Sectional view taken along the line vi-vi in FIGS. 3 and 4 A cross-sectional view taken along the line vv of FIGS.
  • Sectional drawing which shows the cross-sectional structure along the long side direction in the liquid crystal display device which concerns on Embodiment 2 of this invention.
  • Sectional drawing which shows the cross-sectional structure along the long side direction in the liquid crystal display device which concerns on Embodiment 3 of this invention.
  • Sectional drawing which shows the cross-sectional structure along the short side direction in a liquid crystal display device
  • the top view which shows the arrangement configuration of the chassis, LED board, and reflective sheet in the backlight apparatus with which the liquid crystal display device which concerns on Embodiment 4 of this invention is equipped.
  • FIGS. 1 A first embodiment of the present invention will be described with reference to FIGS.
  • the liquid crystal display device 10 is illustrated.
  • a part of each drawing shows an X axis, a Y axis, and a Z axis, and each axis direction is drawn to be a direction shown in each drawing.
  • the upper side shown in FIG.4 and FIG.5 be a front side, and let the lower side of the figure be a back side.
  • the television receiver TV includes a liquid crystal display device 10, a pair of front and back cabinets Ca and Cb that are accommodated so as to sandwich the liquid crystal display device 10, a power source P, and a tuner T.
  • the stand S is supported with the display surface of the liquid crystal display device 10 along the vertical direction (Y-axis direction).
  • the liquid crystal display device (display device) 10 has a horizontally long rectangular shape (rectangular shape, longitudinal shape) as a whole, and is accommodated in a vertically placed state. As shown in FIG.
  • the liquid crystal display device 10 includes a liquid crystal panel 11 that is a display panel and a backlight device (illumination device) 12 that is an external light source, which are integrated by a frame-like bezel 13 or the like. Is supposed to be retained.
  • the display surface of the liquid crystal display device 10 is along the vertical direction” as referred to in the present embodiment is not limited to an aspect in which the display surface of the liquid crystal display device 10 is parallel to the vertical direction, but from a direction along the horizontal direction. Also, it means that it is installed in a direction relatively along the vertical direction, and includes, for example, those inclined by 0 ° to 45 °, preferably 0 ° to 30 ° with respect to the vertical direction.
  • the liquid crystal panel 11 and the backlight device 12 constituting the liquid crystal display device 10 will be described sequentially.
  • the liquid crystal panel (display panel) 11 has a horizontally long rectangular shape (rectangular shape, long shape) when seen in a plane, and a pair of glass substrates are bonded together with a predetermined gap therebetween, The liquid crystal is sealed between both glass substrates.
  • 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.
  • a switching element for example, TFT
  • 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.
  • a polarizing plate is disposed on the outside of both substrates.
  • the backlight device 12 includes a substantially box-shaped chassis 14 having a light emitting portion 14 b that opens on the front side (light emitting side, liquid crystal panel 11 side), and a light emitting portion 14 b of the chassis 14.
  • the optical member 15 is disposed so as to cover the frame, and the frame 16 is disposed along the outer edge portion of the chassis 14 and sandwiches the outer edge portion of the optical member 15 with the chassis 14.
  • an LED (Light Emitting Diode) 17 that is a light source, an LED substrate 18 on which the LED 17 is mounted, and the light in the chassis 14 on the front side (light emitting side, optical member 15 side).
  • the backlight device 12 is a so-called direct type.
  • an LED driving board (light source driving board) 21 that supplies driving power to the LEDs 17, a control board 22 that supplies liquid crystal driving signals to the liquid crystal panel 11, the LED driving board 21, and the control board
  • a power supply board 23 for supplying power to 22 and the like, and a stand attachment member 24 for attaching the stand S to the chassis 14 are attached.
  • the optical member 15 side is the light emission side from the LED 17.
  • the chassis 14 is made of, for example, a metal plate such as an aluminum plate or an electrogalvanized steel plate (SECC). As shown in FIGS. 3 to 5, the chassis 14 has a horizontally long rectangular shape (rectangular shape, longitudinal shape) like the liquid crystal panel 11. A bottom plate 14a, a side plate 14c rising from the outer end of each side (a pair of long sides and a pair of short sides) of the bottom plate 14a toward the front side (light emitting side), and outward from the rising end of each side plate 14c 14d, and is formed in a shallow box shape (substantially a dish shape) that opens toward the front side as a whole.
  • the long side direction of the chassis 14 matches the X-axis direction, and the short side direction matches the Y-axis direction.
  • the bottom plate 14 a in the chassis 14 is disposed on the back side of the LED substrate 18, that is, on the side opposite to the light emitting side of the LED 17.
  • a frame 16 and an optical member 15 to be described below can be placed on each receiving plate 14d in the chassis 14 from the front side.
  • a frame 16 is screwed to each receiving plate 14d.
  • the optical member 15 has a horizontally long rectangular shape when viewed in a plane, like the liquid crystal panel 11 and the chassis 14. As shown in FIGS. 4 and 5, the optical member 15 has its outer edge portion placed on the receiving plate 14 d so as to cover the light emitting portion 14 b of the chassis 14 and to be interposed between the liquid crystal panel 11 and the LED 17. Arranged.
  • the optical member 15 is opposed to the LED 17 with a predetermined interval on the front side, that is, on the light emitting side.
  • the optical member 15 includes a diffusion plate 15a disposed on the back side (the side opposite to the LED 17 side and the light emitting side) and an optical sheet 15b disposed on the front side (the liquid crystal panel 11 side and the light emitting side). .
  • the diffusing plate 15a has a structure in which a large number of diffusing particles are dispersed in a substantially transparent resin base material having a predetermined thickness, and has a function of diffusing transmitted light.
  • the optical sheet 15b has a sheet shape that is thinner than the diffusion plate 15a, and two optical sheets 15b are laminated. Specific types of the optical sheet 15b include, for example, a diffusion sheet, a lens sheet, a reflective polarizing sheet, and the like, which can be appropriately selected and used.
  • the frame 16 has a frame shape along the outer peripheral edge portions of the liquid crystal panel 11 and the optical member 15. An outer edge portion of the optical member 15 can be sandwiched between the frame 16 and each receiving plate 14d (FIGS. 4 and 5).
  • the frame 16 can receive the outer edge portion of the liquid crystal panel 11 from the back side, and can sandwich the outer edge portion of the liquid crystal panel 11 with the bezel 13 disposed on the front side (FIGS. 4 and 5). ).
  • the LED 17 has a configuration in which an LED chip is sealed with a resin material on a substrate portion fixed to the LED substrate 18.
  • the LED chip mounted on the substrate unit has one main emission wavelength, and specifically, one that emits blue light in a single color is used.
  • a phosphor that emits a predetermined color by being excited by the blue light emitted from the LED chip is dispersed and blended. As a result, white light emission is possible.
  • the LED 17 is a so-called top surface light emitting type in which a top surface opposite to the mounting surface with respect to the LED substrate 18 (a surface facing the optical member 15) is a light emitting surface 17a, and its optical axis is in the Z-axis direction. That is, they are arranged so as to coincide with the direction orthogonal to the display surface of the liquid crystal panel 11 (the plate surface of the optical member 15).
  • the “optical axis” refers to an axis that coincides with the traveling direction of light having the highest emission intensity among the emitted light from the LED 17.
  • the LED substrate 18 has a vertically long rectangular shape (rectangular shape, rectangular shape) in a plan view, and the long side direction (length direction) is the Y-axis direction, that is, It is accommodated in the chassis 14 so as to coincide with the short side direction of the chassis 14 and the short side direction (width direction) coincides with the X-axis direction, that is, the long side direction of the chassis 14.
  • a plurality of LED substrates 18 are accommodated in the chassis 14 in parallel with each other along the long side direction.
  • the LED board 18 is one sheet at the center position in the long side direction of the chassis 14, one sheet at each end position, and one sheet at each intermediate position between the center position and the both end positions.
  • each LED board 18 is made into the magnitude
  • FIG. Each LED board 18 has a long side dimension that is slightly smaller than a short side dimension of the bottom plate 14a of the chassis 14, and crosses the bottom plate 14a almost along the short side direction.
  • the above-described LED 17 is surface-mounted on a plate surface facing the front side (surface facing the optical member 15 side), and this is the mounting surface 18a. .
  • the mounting surface 18a of the LED substrate for example, three LEDs 17 are arranged in parallel, for example, three pieces each along the short side direction and 11 pieces along the long side direction.
  • the LED board 18 having such a configuration is arranged in a state in which a plurality of LED boards 18 are arranged in parallel along the long side direction in the chassis 14, so that the LED 17 is a surface of the bottom plate 14 a in the chassis 14 as shown in FIG. 3.
  • a plurality of pieces are arranged in a matrix (arranged in a matrix) with the X-axis direction as the row direction and the Y-axis direction as the column direction. That is, the LEDs 17 are arranged in parallel from the one end to the center in the short side direction on the bottom plate 14a of the chassis 14 and from there to the other end. It can be said that a plurality are arranged in parallel from one end EP in the side direction to the center CP, and further to the other end EP. Note that the arrangement pitch in the X-axis direction and the Y-axis direction of the LEDs 17 arranged in a plane in the chassis 14 is substantially constant, that is, it can be said that the LEDs 17 are arranged at substantially equal intervals.
  • a wiring pattern (not shown) made of a metal film (such as copper foil) is formed on the mounting surface 18a of the LED substrate 18 to connect the adjacent LEDs 17 in series across the mounted LED 17 group.
  • the terminal portions formed at both ends of the wiring pattern are connected to the external LED drive substrate 21 via an electric wire or the like, so that drive power can be supplied to each LED 17.
  • the base material of the LED substrate 18 is made of metal like the chassis 14, and the wiring pattern (not shown) described above is formed on the surface thereof via an insulating layer.
  • insulating materials such as a ceramic, can also be used as a material used for the base material of LED board 18.
  • the reflection sheet 19 is made of a synthetic resin and has a white surface with excellent light reflectivity. As shown in FIGS. 3 to 5, the reflection sheet 19 has a size that is laid over almost the entire inner surface of the chassis 14, so that the LED board 18 disposed in the chassis 14 is almost entirely on the front side. It is possible to cover from (light emitting side, optical member 15 side). The reflection sheet 19 can reflect the light in the chassis 14 toward the front side (light emission side, optical member 15 side). The reflection sheet 19 extends along the LED substrate 18 (bottom plate 14a) and rises from the outer ends of the bottom portion 19a to the front side with a bottom portion 19a having a size that covers each LED substrate 18 in a lump.
  • the bottom portion 19 a of the reflection sheet 19 is arranged so as to overlap the front side surface of each LED substrate 18, that is, the mounting surface 18 a of the LED 17.
  • a light source insertion hole 19 d through which each LED 17 is individually inserted is provided in the bottom portion 19 a of the reflection sheet 19 at a position overlapping with each LED 17 in plan view.
  • a plurality of light source insertion holes 19d are arranged in parallel in a matrix (matrix shape) in the X-axis direction and the Y-axis direction corresponding to the arrangement of the LEDs 17.
  • the substrate holding member 20 is made of a synthetic resin having a white surface with excellent light reflectivity. As shown in FIGS. 5 and 6, at least the LED substrate 18 is interposed between the substrate 14 and the bottom plate 14 a of the chassis 14. It can be held.
  • the substrate holding member 20 includes a main body portion 20 a along the plate surface of the LED substrate 18, and a fixing portion 20 b that protrudes from the main body portion 20 a toward the back side, that is, the chassis 14 side and is fixed to the chassis 14.
  • the main body portion 20a has a substantially circular plate shape when seen in a plan view, and at least the LED substrate 18 can be sandwiched between the main body portion 20a and the bottom plate 14a of the chassis 14.
  • the fixing portion 20b can be locked to the bottom plate 14a while penetrating through an insertion hole and an attachment hole respectively formed corresponding to the mounting position of the board holding member 20 on the LED board 18 and the bottom plate 14a of the chassis 14. .
  • a plurality of the substrate holding members 20 are appropriately distributed and arranged in the plane of the LED substrate 18. Specifically, two each of the substrate holding members 20 are long along the short side direction of the LED substrate 18. A total of 8 pieces are arranged intermittently, 4 pieces along the side direction.
  • the substrate holding member 20 holds only the LED board 18 between the bottom plate 14a of the chassis 14 and the board holding member 20 holds the bottom part 19a of the reflection sheet 19 in addition to the LED board 18 in a lump. It is possible to include these two types.
  • each attachment component attached to the outside of the chassis 14 will be described in detail.
  • an LED driving substrate 21 As shown in FIG. 4 to FIG. 6, on the back side surface of the bottom plate 14 a of the chassis 14, that is, the surface opposite to the LED substrate 18 (LED 17) side, an LED driving substrate 21, a control substrate 22, a power source
  • substrate 23 and the stand attachment member 24 are each attached.
  • the attachment base part 14e which protrudes partially toward the back side is formed in the attachment location of each attachment part in the baseplate 14a, and each attachment part is attached in the state mounted on this attachment base part 14e. It is like that.
  • the LED drive substrate 21 is formed by forming a predetermined circuit pattern (not shown) on a synthetic resin (for example, paper phenol or glass epoxy resin) substrate and mounting various electronic components. 4 and 5, the LED drive board 21 is connected to each LED board 18 in the chassis 14 and a power supply board 23 outside the chassis 14 via electric wires, etc. By supplying the drive voltage input from 23 to the LED 17 mounted on each LED board 18, the LED 17 has a function of controlling turning on / off of each LED 17.
  • the LED drive boards 21 are arranged in pairs near both ends in the long side direction of the bottom plate 14a of the chassis 14, and are attached to mounting bases 14e formed there by screws or the like.
  • the control board 22 has a predetermined circuit pattern (not shown) formed on a synthetic resin (for example, paper phenol or glass epoxy resin) board, and various input signals such as a TV signal from the tuner T. Is converted into a liquid crystal driving signal, and the converted liquid crystal driving signal is supplied to the liquid crystal panel 11. As shown in FIGS. 4 and 5, the control board 22 is located closer to the center than the LED driving board 21 described above in the long side direction in the bottom plate 14a of the chassis 14 (specifically, the control board 22 is closer to the center. 4 and is attached to a mounting base portion 14e formed there by a screw or the like.
  • a synthetic resin for example, paper phenol or glass epoxy resin
  • the power supply board 23 is a power supply source that supplies power to the LED drive board 21 and the control board 22. 4 and 5, the power supply board 23 is located closer to the center than the LED drive board 21 described above in the long side direction in the bottom plate 14a of the chassis 14 (specifically, the power supply board 23 is closer to the center. 4 and is attached to a mounting base portion 14e formed there by a screw or the like.
  • the stand mounting member 24 is made of metal like the chassis 14, and as shown in FIGS. 4 and 5, extends substantially along the Y-axis direction (short side direction, vertical direction of the chassis 14). It is columnar. A pair of stand attachment members 24 are respectively arranged at positions between the control board 22 and the power supply board 23 on the center side and the LED drive boards 21 on both ends of the bottom plate 14a of the chassis 14 in the long side direction. Yes.
  • the stand mounting member 24 has a length that extends over the entire length in the short side direction of the bottom plate 14 a of the chassis 14.
  • the stand mounting member 24 is formed by bending a metal plate or the like, thereby extending along the Y-axis direction and opening in a substantially rectangular tube shape (channel type) that opens to the bottom plate 14a side.
  • projection part which protrudes along an X-axis direction from both ends.
  • a mounting portion (not shown) of the stand S is inserted from below in the vertical direction in the vertically placed state, and is attached by screws or the like.
  • projection parts among the stand attachment members 24 are attached with the bis
  • the chassis 14 has a bottom plate 14 a that is warped outward in advance, in other words, an outwardly warped shape, specifically, both end portions in the long side direction.
  • the central portion CP is protruded (retracted) from the EP to the back side, that is, the side opposite to the LED substrate 18 (LED 17) side.
  • the bottom plate 14a has a substantially V-shaped cross-sectional shape cut along the long side direction (X-axis direction) as a whole, and a bent portion F that forms a straight line along the Y-axis direction at the central portion CP. Formed (see FIG. 4).
  • the surface (inner surface) facing the LED board 18 (LED 17) side of the bottom plate 14a has a pair of inclined surfaces IS that are inclined from both end portions EP to the central portion CP in the long side direction. Both inclined surfaces IS are connected at the central portion CP.
  • the angle formed by the pair of inclined surfaces IS is an obtuse angle.
  • the bottom plate 14a is formed in an outward warp shape in advance, so that it is maintained in a flat shape as a whole (see FIG. 7).
  • the bottom plate 14a is formed in an outward warp shape in advance, so that it is maintained in a flat shape as a whole (see FIG. 7).
  • the bottom plate 14 a of the chassis 14 partially protrudes along the Z-axis direction toward the inside, that is, the LED substrate 18 (LED 17) side, and the LED substrate 18. Is integrally formed.
  • the spacer 25 is interposed between the LED substrate 18 (LED 17) and the main body portion of the bottom plate 14a, and can regulate the distance between the LED substrate 18 and the main body portion of the bottom plate 14a to be constant.
  • the “main body portion of the bottom plate 14a” referred to here is a non-formed portion of the spacer 25 where the spacer 25 is not formed in the bottom plate 14a.
  • the spacer 25 has a substantially bottomed cylindrical shape that protrudes from the main body portion toward the front side by drawing or striking a portion that is substantially dotted when viewed in a plane in the plane of the bottom plate 14a.
  • the LED substrate 18 can be received from the back side by the protruding tip.
  • An attachment hole to which a substrate holding member 20 for holding the LED substrate 18 can be attached is formed at the protruding tip of the spacer 25, and a fixing portion 20b of the substrate holding member 20 is formed at the hole edge. It is designed to be locked. That is, it can be said that the spacer 25 functions as a mounting base that supports the LED substrate 18 at a position that is lifted by a predetermined height from the main body portion of the bottom plate 14a.
  • a plurality of spacers 25 are intermittently arranged in parallel in the long side direction (X-axis direction) and the short side direction (Y-axis direction) in the plane of the bottom plate 14a, and the arrangement is shown in FIG. This is consistent with the arrangement of the substrate holding members 20. Accordingly, a plurality of spacers 25 are individually arranged for each LED board 18 and can support both ends of each LED board 18 in the short side direction (see FIG. 5).
  • the spacer 25 is arranged on the central portion CP side rather than on the end portion EP side in the long side direction in the plane of the bottom plate 14 a.
  • the protrusion dimension (protrusion height) from the portion is formed to be relatively large. That is, the spacer 25 is arranged such that the distance between the LED substrate 18 (LED 17) and the main body portion of the bottom plate 14a is relatively larger on the central portion CP side than on the end portion EP side in the long side direction of the bottom plate 14a. I can say.
  • the protruding dimension of the spacer 25 from the main body portion of the bottom plate 14a is continuous in such a manner that it decreases as it approaches the both ends EP in the long side direction of the bottom plate 14a, but increases as it approaches the center portion CP. Will gradually change.
  • the protruding dimension of the spacer 25 changes gently according to the inclination angle of the inclined surface IS on the bottom plate 14a, and the distance between the inclined surface IS and the surface of the LED substrate 18 on the back side (the side opposite to the mounting surface 18a). Is approximately equal to As shown in FIG. 6, the spacers 25 arranged in parallel in the short side direction of the bottom plate 14a have the same arrangement in the long side direction, and thus the protruding dimensions are substantially the same.
  • the spacers 25 distributed in the plane of the bottom plate 14 a are substantially flush with each other at their protruding tip surfaces (receiving surfaces for the LED substrate 18). Yes. Accordingly, the LED substrates 18 supported by the spacers 25 are all flush with each other regardless of the installation position in the long side direction of the chassis 14.
  • each LED board 18 is held between the main body portion of the bottom plate 14a according to the arrangement in the long side direction in the chassis 14 (the arrangement on the end portion EP side or the arrangement on the central portion CP side) (although the distance is different, the position in the Z-axis direction (the direction from the main body portion of the bottom plate 14a toward the LED substrate 18 (LED 17)) is supported by the spacer 25 having the same height as the interval. And the flatness thereof is kept uniform. Further, with respect to each LED 17 mounted on each LED board 18, the light emitting surfaces 17 a are flush with each other, and the optical axes are parallel to each other so that it is almost equal to the Z-axis direction. I'm doing it.
  • This embodiment has the structure as described above, and its operation will be described next.
  • the separately manufactured liquid crystal panel 11, backlight device 12, bezel 13 and the like are assembled.
  • the manufacturing procedure of the backlight device 12 will be described mainly with respect to the manufacturing procedure of the liquid crystal display device 10.
  • each LED board 18 on which the LEDs 17 are mounted in the chassis 14 is assembled.
  • the chassis 14 is accommodated in the chassis 14 with the front surface (inner surface) of the bottom plate 14a facing upward in the vertical direction (see FIGS. 5 and 6). reference).
  • the LED substrate 18 is arranged at a predetermined position in the surface of the bottom plate 14a so as to be supported by each spacer 25 formed on the bottom plate 14a, the LED substrate 18 is attached to the bottom plate 14a by attaching the substrate holding member 20. On the other hand, it is held in the mounted state.
  • the work of laying the reflection sheet 19 is continued.
  • the bottom plate 14 a is placed on each LED substrate 18 while being aligned so that each light source insertion hole 19 d is aligned with each LED 17, and each extending portion 19 c is placed on each receiving plate 14 d.
  • the substrate holding member 20 is attached from above the bottom portion 19 a of the reflection sheet 19, so that both the LED substrate 18 and the bottom portion 19 a of the reflection sheet 19 can be sandwiched between the bottom plate 14 a of the chassis 14.
  • the optical member 15 is placed on the receiving plate 14d of the chassis 14 and attaching the frame 16, the optical member 15 is held with its outer peripheral edge sandwiched.
  • the assembly of the components arranged on the front side in the backlight device 12 is completed.
  • the assembly of the components arranged on the front side in the liquid crystal display device 10 is completed.
  • the bezel 13 of the liquid crystal display device 10 is operated with the chassis 14 in a posture in which the back surface (outer surface) of the bottom plate 14a faces upward in the vertical direction. Place on stage WB. At this time, the bottom plate 14a of the chassis 14 is warped and deformed by its own weight or the weight of the LED substrate 18, and the center portion CP is displaced more downward in the vertical direction than the both end portions EP in the long side direction. become.
  • the amount of deformation tends to increase as the bottom plate 14a of the chassis 14 increases in size as the liquid crystal display device 10 increases in size, and increases as the plate thickness of the chassis 14 decreases as the cost decreases. If the bottom plate 14a is deformed inwardly (deformed so as to be recessed inward) to have an arcuate shape, the flatness of the bottom plate 14a is impaired, and for example, the positional relationship in the Z-axis direction at each mounting base 14e varies. There is a possibility that the problem that the mounting work of each mounting part becomes very difficult will occur.
  • the bottom plate 14a of the chassis 14 is processed in advance in a warped shape, that is, in a shape in which the central portion CP protrudes to the back side rather than both end portions EP in the long side direction.
  • a warped shape that is, in a shape in which the central portion CP protrudes to the back side rather than both end portions EP in the long side direction.
  • the main body portion of the bottom plate 14a of the chassis 14 is arranged in a substantially flat state in the plane thereof, so that the LED drive board 21, the control board 22, and the power supply board 23 which are mounting parts are arranged.
  • the stand attachment member 24 can be easily attached to the back side surface (specifically, each attachment pedestal portion 14e) of the bottom plate 14a, so that the attachment workability is excellent.
  • the assembly of the liquid crystal display device 10 is completed by assembling all the attachment parts.
  • the power supply of the liquid crystal display device 10 manufactured as described above is turned on, as shown in FIGS. 5 and 6, the power supply from the power supply substrate 23 is received, and the LED drive substrate 21 is connected to each of the wires via an electric wire or the like.
  • Driving power is supplied to each LED 17 mounted on the LED substrate 18 to light it, and various signals for liquid crystal display are supplied from the control substrate 22 to the liquid crystal panel 11.
  • the light emitted from the light emitting surface 17a of each LED 17 is directly or indirectly reflected on the reflection sheet 19 to irradiate the optical member 15, and in the process of transmitting the light, a predetermined optical action (diffusion). Action and light collecting action).
  • a predetermined image is displayed on the display surface of the liquid crystal panel 11 by irradiating the liquid crystal panel 11 with light transmitted through the optical member 15.
  • each LED 17 has a light distribution such that the emission intensity of emitted light traveling in the direction along the optical axis is the highest, and the emission intensity of the emitted light decreases as the angle with respect to the optical axis increases. For this reason, for example, when the direction of the optical axis is shifted by each LED 17, there is a possibility that the amount of irradiation light in the surface of the optical member 15 (light emitting portion 14 b) may be uneven.
  • the spacer 25 is interposed between the LED board 18 on which each LED 17 is mounted and the main body portion of the bottom plate 14a having a curved shape, so that each LED board 18 is flat.
  • the optical axes of the LEDs 17 are parallel to each other without deviating from each other, so that the optical member 15 is irradiated. Unevenness is less likely to occur in the light. Moreover, since the flatness of each LED board 18 is ensured by the spacer 25, the light emitting surfaces 17a of the LEDs 17 are kept flush with each other. Compared with the case where the irradiation range on the optical member 15 varies when the position is shifted, unevenness in the amount of irradiation light within the surface of the optical member 15 is less likely to occur.
  • each LED substrate 18 since the flatness of each LED substrate 18 is ensured by the spacer 25, the mounting surface 18a of each LED substrate 18 is kept flush with each other, so that the light emitting surface 17a of each LED 17 as described above. In addition to being kept flush with each other, a step is less likely to occur at the bottom portion 19a of the reflection sheet 19 laid on the mounting surface 18a, so that the amount of light reflected by the reflection sheet 19 is less likely to be uneven. . As described above, the display quality of the image displayed on the display surface of the liquid crystal panel 11 can be improved.
  • the backlight device (illumination device) 12 of the present embodiment accommodates a plurality of LEDs (light sources) 17 and a plurality of LEDs 17, and includes a plurality of LEDs from the end portion EP to the central portion CP.
  • the chassis 14 having the bottom plate 14a in which the LEDs 17 are arranged side by side and the central portion CP projects beyond the end portion EP to the opposite side of the LED 17 side, and the surface of the bottom plate 14a facing the LED 17 side
  • An attachment component (LED drive board 21, control board 22, power supply board 23, and stand attachment member 24) attached to the opposite surface is interposed between LED 17 and bottom plate 14a, and the distance between LED 17 and bottom plate 14a is
  • the spacer 25 is arranged so as to be relatively larger on the central portion CP side than on the end portion EP side.
  • the chassis 14 When attaching the attachment parts to the chassis 14, for example, the chassis 14 is set to a posture in which the surface opposite to the surface facing the LED 17 in the bottom plate 14a is on the upper side in the vertical direction. At this time, the bottom plate 14a is deformed by its own weight or the weight of the LED 17, and the central portion CP is displaced downward in the vertical direction from the end EP, that is, largely displaced toward the LED 17 side. Since CP is configured to protrude to the side opposite to the LED 17 side, it is difficult for the central portion CP and the end portion EP to have a difference in position in the vertical direction. Thereby, since the flatness of the whole in the baseplate 14a is maintained favorable, the operation
  • the bottom plate 14a has a configuration in which the central portion CP protrudes to the opposite side of the LED 17 from the end portion EP, if a plurality of LEDs are arranged along the LED side surface of the bottom plate 14a. Is different from the LED disposed on the central portion CP side of the bottom plate 14a and the LED disposed on the end portion EP side in the position corresponding to the protrusion of the central portion CP.
  • unevenness may occur.
  • the spacer 25 is interposed between the LED 17 and the bottom plate 14a, so that the distance between the LED 17 and the bottom plate 14a is relatively closer to the central portion CP side than the end portion EP side of the bottom plate 14a. Since the position is increased, the difference in position as described above is unlikely to occur between the LED 17 disposed on the central portion CP side and the LED 17 disposed on the end portion EP side. Thereby, unevenness is less likely to occur when the light emitted from each LED 17 is emitted outside the backlight device 12. As described above, the problem caused by the deformation generated in the bottom plate 14a of the chassis 14 can be solved.
  • the bottom plate 14a has an inclined surface IS that is inclined from the end EP side toward the central portion CP side on the LED 17 side, and the spacer 25 has a distance between the LED 17 and the bottom plate 14a such that the end EP. It is formed so as to gradually increase from the side toward the central portion CP side.
  • the LED 17 and the end portion arranged on the central portion CP side can be changed.
  • the LED 17 arranged on the EP side the difference in position that can occur as the central portion CP protrudes is more appropriately mitigated. Thereby, unevenness is less likely to occur when light emitted from each LED 17 is emitted outside the backlight device 12.
  • the bottom plate 14a has a pair of inclined surfaces IS and the pair of inclined surfaces IS are continuous at the central portion CP, so that the entire cross-sectional shape is substantially V-shaped. In this way, when attaching the attachment component to the bottom plate 14a, the overall flatness of the bottom plate 14a can be made better, so that the attachment operation of the attachment component can be made easier.
  • the spacer 25 is formed so that the optical axes of the plurality of LEDs 17 are parallel to each other. In this way, unevenness is less likely to occur when the light emitted from the plurality of LEDs 17 is emitted outside the backlight device 12.
  • the “optical axis” refers to an axis that coincides with the traveling direction of light having the highest light emission intensity among the light emitted from the LED 17.
  • the spacer 25 is formed so that the light emitting surfaces 17a of the plurality of LEDs 17 are flush with each other. In this way, unevenness is less likely to occur when the light emitted from the light emitting surface 17a of the plurality of LEDs 17 is emitted outside the backlight device 12.
  • the bottom plate 14a has a rectangular shape in plan view, and the central portion CP in the long side direction protrudes on the side opposite to the LED 17 side from both end portions EP in the long side direction. .
  • the bottom plate 14a having a rectangular shape when seen in a plane is deformed more in the long side direction than in the short side direction when the mounting part is attached. Therefore, it is possible to keep the flatness of the mounting part more effectively and better, and the mounting work of the mounting parts becomes easier.
  • an LED substrate 18 on which a plurality of LEDs 17 are mounted is provided, and the spacer 25 is interposed between the surface of the LED substrate 18 opposite to the mounting surface 18a on which the LEDs 17 are mounted and the bottom plate 14a. It is arranged with.
  • the distance between the LED 17 mounted on the mounting surface 18a of the LED substrate 18 and the bottom plate 14a is relatively increased by the spacer 25 on the central portion CP side than on the end portion EP side of the bottom plate 14a. Therefore, the difference in position that can occur when the central portion CP protrudes between the LED 17 disposed on the central portion CP side and the LED 17 disposed on the end portion EP side is more appropriately mitigated.
  • unevenness is less likely to occur.
  • a plurality of LED substrates 18 are arranged side by side from the end portion EP to the center portion CP of the bottom plate 14a, and the spacer 25 is formed between the surface of the LED substrate 18 opposite to the mounting surface 18a and the bottom plate 14a.
  • the distance is arranged to be relatively larger on the central portion CP side than on the end portion EP side. If it does in this way, it will arise when central part CP protrudes with LED board 18 distribute
  • the spacer 25 is formed so that the mounting surfaces 18a of the LED substrate 18 are flush with each other. In this way, unevenness is less likely to occur when the light emitted from the LEDs 17 mounted on the plurality of LED boards 18 is emitted outside the backlight device 12.
  • the spacer 25 is individually arranged for each of the plurality of LED substrates 18. In this way, the positional relationship between the bottom plate 14a and the surface on the opposite side of the mounting surface of each LED substrate 18 is compared with the case where the spacer is formed to extend across the plurality of LED substrates 18. It can be adjusted more finely.
  • the spacer 25 is integrally formed so as to protrude from the surface of the bottom plate 14a facing the LED 17 to the LED 17 side. In this way, since the spacer 25 is integrally formed with the bottom plate 14a, it is suitable for reducing the manufacturing cost.
  • the spacer 125 is a separate component from the chassis 114, and is arranged in a form sandwiched between the LED substrate 118 and the bottom plate 114a.
  • the spacers 125 are made of synthetic resin and have a substantially columnar shape.
  • a plurality of spacers 125 are dispersedly arranged on the bottom plate 114 a of the chassis 114, and a plurality of spacers 125 are arranged for each LED substrate 118.
  • the arrangement of the spacers 125 is the same as that of the first embodiment, and is the same as the arrangement of the substrate holding members 20 shown in FIG.
  • the spacer 125 is fixed to, for example, a double-sided tape or an adhesive (not shown) on the front side surface (the surface facing the LED substrate 118 side) of the bottom plate 114a.
  • the substrate holding member 120 holds the LED substrate 118 by locking the fixing portion 120b to the mounting hole formed in the bottom plate 114a while penetrating the LED substrate 118.
  • the spacer 125 is a separate component from the bottom plate 114a and is attached to the bottom plate 114a. In this way, there is a high degree of freedom in changing the material and shape of the spacer 125, for example.
  • Embodiment 3 A third embodiment of the present invention will be described with reference to FIG. 9 or FIG. In this Embodiment 3, what changed the form of the spacer 225 from Embodiment 2 mentioned above is shown. In addition, the overlapping description about the same structure, an effect
  • the spacer 225 is a separate component from the chassis 214 and extends along the plate surface of the LED substrate 218 as in the second embodiment. It is supposed to exist.
  • the spacer 225 has a substantially plate shape along the plate surface of the LED substrate 218, and is in contact with the surface on the back side of the LED substrate 218 in a surface contact state.
  • the spacers 225 have a size in plan view that covers almost the entire area of the rear surface of the LED substrate 218, and are individually arranged for each LED substrate 218.
  • the LED substrate 218 is fixed to the spacer 225 with, for example, a double-sided tape or an adhesive, and the substrate holding members 20 and 120 described in the first and second embodiments are omitted. ing.
  • Embodiment 4 A fourth embodiment of the present invention will be described with reference to FIGS. In this Embodiment 4, what changed the shape of the LED board 318, etc. is shown. In addition, the overlapping description about the same structure, an effect
  • the LED substrate 318 As shown in FIGS. 11 to 13, the LED substrate 318 according to the present embodiment has a horizontally long rectangular shape, the long side direction matches the X-axis direction, and the short side direction matches the Y-axis direction. It is accommodated in the chassis 314 in such a posture.
  • the LED substrates 318 are arranged in a matrix in the chassis 314 with the X-axis direction as the row direction and the Y-axis direction as the column direction. Specifically, three LED substrates 318 are arranged in parallel in a matrix in the chassis 314, three in the X-axis direction (row direction) and ten in the Y-axis direction (column direction). ing.
  • a plurality On the mounting surface 318a of the LED substrate 318, a plurality (four in FIG.
  • LEDs 317 are arranged in a line along the long side direction.
  • a pair of substrate holding members 320 are attached to both ends of the LED substrate 318 in the long side direction.
  • the spacer 325 formed integrally with the bottom plate 314a of the chassis 314 has the same planar arrangement as the substrate holding member 320 described above, and supports both end portions in the long side direction of each LED substrate 318 from the back side. It is arranged to be able to. Even in such a configuration, the distance between the bottom plate 314 having a warped shape and each LED substrate 318 can be appropriately maintained by the spacer 325, and the same operations and effects as those of the first embodiment can be obtained. .
  • Embodiment 5 of the present invention will be described with reference to FIG.
  • the shape of the bottom plate 414a of the chassis 414 is changed.
  • action, and effect as above-mentioned Embodiment 1 is abbreviate
  • the center portion CP protrudes from the back side, that is, the side opposite to the LED substrate side, from both ends EP in the short side direction (Y-axis direction). It is assumed to have an outward curvature shape.
  • the bottom plate 414a has a substantially V-shaped cross section cut along the short side direction, and is linear at the central portion CP along the long side direction (X-axis direction) of the bottom plate 414a. A bent portion F is formed.
  • the pair of LED drive boards 421 are arranged at both ends of the long side direction of the bottom plate 414a and at the lower part shown in FIG.
  • the control board 422 and the power supply board 423 are 14 is divided into an upper portion and a lower portion shown in FIG. 14 in the central portion of the bottom plate 414a in the long side direction and in the short side direction, and the stand mounting member 424 is further arranged in the long side direction of the bottom plate 414a.
  • a pair of LED drive boards 421, a control board 422, and a power supply board 423 are positioned and arranged. With this configuration, when assembling each mounting component (LED drive board 421, control board 422, power supply board 423, stand mounting member 424), the chassis 414 and the back surface (outer surface) of the bottom plate 414a are in the vertical direction.
  • the central portion CP is displaced more downward in the vertical direction than both end portions EP in the short side direction.
  • the displacement amount can be absorbed by the original outward warping shape, so that the bottom plate 414a can be maintained in a flat shape, and the attachment workability of each attachment component is excellent.
  • Embodiment 6 of the present invention will be described with reference to FIG.
  • the shape of the bottom plate 514a of the chassis 514 is further changed from the fifth embodiment described above.
  • action, and effect as above-mentioned Embodiment 5 is abbreviate
  • the bottom plate 514a of the chassis 514 has a central portion CP1 protruding rearward from the both end portions EP1 in the long side direction (X-axis direction), and the short side direction (Y-axis direction). ),
  • the center portion CP2 is more outwardly curved than the both ends EP2.
  • the bottom plate 514a has a substantially V-shaped cross section cut along the long side direction and the short side direction, and has a substantially bowl shape (quadrangular pyramid shape) as a whole.
  • a bent portion F1 that is linear along the short side direction of the bottom 514a is formed, whereas in the central portion CP2 in the short side direction, A bent portion F2 that forms a straight line is formed along the long side direction of the bottom plate 514a.
  • the pair of LED drive boards 521 are disposed at both ends of the long side direction of the bottom plate 514a and at the lower part shown in FIG. 15 in the short side direction, whereas the control board 522 and the power supply board 523 are The bottom plate 514a is arranged at a position sandwiching the central portion CP1 in the long side direction and in the lower side portion shown in FIG.
  • the LED drive board 521 is disposed between the control board 522 and the power supply board 523. With this configuration, when assembling each mounting component (the LED drive board 521, the control board 522, the power board 523, and the stand mounting member 524), the chassis 514 and the back surface (outer surface) of the bottom plate 514a are in the vertical direction.
  • the bottom plate 514a is warped by its own weight or the weight of the LED substrate, and the central portions CP1 and CP2 are more vertical than the end portions EP1 and EP2 in the long side direction and the short side direction.
  • Embodiment 7 of the present invention will be described with reference to FIG. In this Embodiment 7, what changed the shape of the baseplate 614a of the chassis 614 is shown. In addition, the overlapping description about the same structure, an effect
  • the bottom plate 614a of the chassis 614 has a substantially trapezoidal cross-sectional shape as a whole along the long side direction (X-axis direction). That is, the bottom plate 614a has a central portion CP in the long side direction that is substantially flat along the X-axis direction and the Y-axis direction. Therefore, the surface (inner surface) of the bottom plate 614 facing the LED substrate 618 (LED 617) side has a pair of inclined surfaces IS that are inclined from both end portions EP toward the central portion CP in the long side direction, and the center. It has a flat surface FS which is arranged in the part CP and is continuous with the pair of inclined surfaces IS. Of the bottom plate 614a, a pair of bent portions F that form a straight line along the short side direction (Y-axis direction) of the bottom plate 614a is formed at a connection portion between the pair of inclined surfaces IS and the flat surface FS.
  • Embodiment 8 will be described with reference to FIG. 17 or FIG.
  • the bottom plate 714a of the chassis 714 has a flat shape.
  • the bottom plate 714a of the chassis 714 has a flat shape along the X-axis direction and the Y-axis direction as a whole from the end part EP to the center part CP.
  • a spacer 725 is provided between the LED substrate 718 and the main body portion of the bottom plate 714a.
  • the spacer 725 is set such that the protruding dimension of the bottom plate 714a from the main body portion gradually increases from the end portion EP of the bottom plate 714a toward the central portion CP. That is, the spacer 725 is arranged such that the distance between the LED 717 and the bottom plate 714a is relatively larger on the central portion CP side than on the end portion EP side.
  • the plurality of LED substrates 718 arranged side by side along the long side direction in the chassis 714 are arranged closer to the central portion CP side than those arranged on both end portions EP side in the long side direction of the bottom plate 714a.
  • the one is arranged at a position protruding to the front side in the Z-axis direction. Specifically, among the five LED substrates 718 arranged in parallel, four of the four LED boards closer to the end portion EP are inclined outward, and one of the one located in the central portion CP is substantially flat.
  • the cabinet Cb on the back side has a display device side wall hanging for supporting the liquid crystal display device 710 in a wall hanging state.
  • the member 26 is attached by a screw member 27.
  • the display device side wall hanging member 26 is adapted to be hooked on a wall surface side wall hanging member (not shown) attached to the wall surface of the wall on which the liquid crystal display device 710 is to be installed, thereby floating the liquid crystal display device 710 in the air. It is possible to support in a wall-mounted state.
  • the rear cabinet Cb is formed with a mounting base 28 that protrudes toward the stand mounting member 724 attached to the rear surface of the bottom plate 714a of the chassis 714, and the stand is passed through the mounting base 28.
  • the display device side wall hanging member 26 is attached.
  • the cabinet Cb on the back side and the bottom plate 714a of the chassis 714 are displayed by the weight of the liquid crystal display device 710 as shown in FIG.
  • the device side wall member 26 is pulled from the back side at the attachment position to be deformed into an outward curvature shape.
  • the bottom plate 714a has a configuration in which, for example, the central portion CP side protrudes more toward the back side than the both end portions EP side in the long side direction along with the outward warping deformation.
  • each LED board 718 is arranged on the central part CP side rather than the one arranged on the both ends EP side by the spacer 725 in advance. Is disposed at a position projecting to the front side in the Z-axis direction, the amount of displacement due to the outward warping deformation of the bottom plate 714a is canceled out, and each LED substrate 718 on the central portion CP side and both end portions EP side.
  • the positional relationship in the Z-axis direction is substantially the same.
  • the mounting surfaces 718a of the LED substrates 718 are flush with each other, the light emitting surfaces 717a of the mounted LEDs 717 are flush with each other, and the optical axes of the LEDs 717 are parallel to each other. Therefore, unevenness is less likely to occur when the light emitted from each LED 717 is emitted outside the backlight device 712.
  • the present invention is not limited to the embodiments described with reference to the above description and drawings.
  • the following embodiments are also included in the technical scope of the present invention.
  • the bottom plate is formed in an arc shape in cross section.
  • an arc-shaped curved surface is formed on the surface of the bottom plate facing the LED side, and such a shape is also included in the present invention.
  • the spacers are formed so that the optical axes of a plurality of LEDs are parallel to each other.
  • the phrase “the optical axes are parallel to each other” here refers to the optical axis
  • a configuration in which the optical axes are completely parallel to each other a configuration in which the optical axes slightly intersect with each other but the intersection angle is extremely small is naturally included.
  • the spacer is formed so that the light emitting surfaces of the plurality of LEDs are flush with each other.
  • the light emitting surfaces are flush with each other.
  • the light emitting surfaces are slightly displaced in the Z-axis direction, but the positional deviation amount is very small. Is also included.
  • the spacer is formed so that the mounting surfaces of the plurality of LED substrates are flush with each other.
  • “Nasu” means that the mounting surfaces are slightly displaced in the Z-axis direction, although the mounting surfaces are not exactly the same in the Z-axis direction.
  • the configuration is also included.
  • planar shape and cross-sectional shape of the spacer are appropriately determined. It can be changed.
  • the chassis has a configuration in which the bottom plate of the chassis has a horizontally long rectangular shape.
  • the bottom plate has a square shape or the bottom plate has a vertically long rectangular shape.
  • the LED substrate has a vertically long rectangular shape or a horizontally long rectangular shape is used.
  • the LED substrate has a square shape.
  • Embodiments 1 to 3 and 5 to 7 described above a configuration in which a plurality of vertically long LED substrates are arranged in parallel along the long side direction of the chassis has been described. It is also possible to adopt a configuration in which a plurality of substrates are arranged in parallel in a matrix along the long side direction and short side direction of the chassis.
  • Embodiment 4 described above a configuration in which a plurality of horizontally long LED substrates are arranged in parallel in a matrix along the long side direction and short side direction of the chassis has been described.
  • the long side dimension of the board may be the same as the long side dimension of the bottom plate of the chassis, and a plurality of LED boards may be arranged in parallel in the short side direction of the chassis.
  • the specific number of LED substrates housed in the chassis can be changed as appropriate. In that case, it is also possible to use only one LED substrate that is approximately the same size as the bottom plate of the chassis.
  • the LED substrate is held on the chassis by the substrate holding member.
  • the LED substrate is used as a spacer by double-sided tape. You may make it hold
  • the LED substrate is attached to the spacer with a double-sided tape.
  • the LED substrate is mounted by the substrate holding member. It may be configured to be held by the chassis.
  • the side plate is formed on all four sides of the bottom plate of the chassis.
  • a pair of side plates is formed only on the long side of the bottom plate.
  • a case where a pair of side plates formed only on the short side of the bottom plate is also included in the present invention.
  • the liquid crystal panel and the chassis are illustrated in a vertically placed state in which the short side direction coincides with the vertical direction.
  • the liquid crystal panel and the chassis are arranged in the long side direction. What is made into the vertical installation state matched with the perpendicular direction is also contained in this invention.
  • an LED is used as a light source.
  • other light sources such as an organic EL can be used.
  • the TFT is used as a switching element of the liquid crystal display device.
  • the present invention can also be applied to a liquid crystal display device using a switching element other than TFT (for example, a thin film diode (TFD)).
  • a switching element other than TFT for example, a thin film diode (TFD)
  • the present invention can be applied to a liquid crystal display device for monochrome display.
  • the liquid crystal display device using the liquid crystal panel as the display panel has been exemplified, but the present invention is also applicable to display devices using other types of display panels.
  • the television receiver provided with the tuner is exemplified, but the present invention can also be applied to a display device not provided with the tuner.
  • SYMBOLS 10 Liquid crystal display device (display device), 11 ... Liquid crystal panel (display panel), 12 ... Backlight device (illumination device) 14, 114, 214, 314, 414, 514, 614 ... Chassis, 14a, 114a, 214a , 314a, 414a, 514a, 614a ... bottom plate, 17, 217, 317, 617 ... LED (light source), 17a ... light emitting surface, 18, 118, 218, 318, 618 ... LED substrate (light source substrate), 18a ... mounting surface 21, 421, 521 ... LED drive board (mounting parts), 22, 422, 522 ... Control board (mounting parts), 23, 423, 523 ...
  • Power supply board (mounting parts), 24, 424, 524 ... Stand mounting members (Mounting parts), 25, 125, 225, 325 ... spacer, CP, CP1, CP2 ... central part, EP, EP1, EP ... end, IS ... inclined plane, TV ... television receiver

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

Le dispositif de rétroéclairage selon l'invention (dispositif d'éclairage) (12) comprend : des LED (sources lumineuses) (17); un châssis (14) qui loge les LED (17) de telle manière que les LED (17) sont agencées de chaque côté à partir des parties d'extrémité (EP) en direction de la partie centrale (CP), et qui présente une plaque de fond (14a) formée de telle manière que la partie centrale (CP) dépasse plus que les parties d'extrémité (EP) en direction du côté opposé aux LED (17); des éléments de montage (une carte d'excitation des LED (21), une carte de commande (22), une carte d'alimentation électrique (23) et un élément de montage fixe (24)) qui sont montés sur une surface de la plaque de fond (14a), ladite surface étant le verso de la surface tournée vers les LED (17); et un écarteur (25) disposé entre la plaque de fond (14a) et les LED (17) de telle manière que la distance entre les LED (17) et la plaque de fond (14a) est relativement plus grande du côté de la partie centrale (CP) que du côté des parties d'extrémité (EP).
PCT/JP2012/068948 2011-08-02 2012-07-26 Dispositif d'éclairage, dispositif d'affichage et dispositif de réception de la télévision WO2013018646A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-169356 2011-08-02
JP2011169356 2011-08-02

Publications (1)

Publication Number Publication Date
WO2013018646A1 true WO2013018646A1 (fr) 2013-02-07

Family

ID=47629171

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/068948 WO2013018646A1 (fr) 2011-08-02 2012-07-26 Dispositif d'éclairage, dispositif d'affichage et dispositif de réception de la télévision

Country Status (1)

Country Link
WO (1) WO2013018646A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2997404A4 (fr) * 2014-08-01 2017-03-08 Sct Technology, Ltd. Dispositif d'affichage et procédé pour réduire les effets de moiré à l'aide de celui-ci
JP2021022531A (ja) * 2019-07-30 2021-02-18 シャープ株式会社 照明装置、表示装置、及びテレビ受信装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09330048A (ja) * 1996-04-12 1997-12-22 Idemitsu Petrochem Co Ltd 照明装置用ハウジング
JP2008129199A (ja) * 2006-11-17 2008-06-05 Sharp Corp 表示装置用照明装置、表示装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09330048A (ja) * 1996-04-12 1997-12-22 Idemitsu Petrochem Co Ltd 照明装置用ハウジング
JP2008129199A (ja) * 2006-11-17 2008-06-05 Sharp Corp 表示装置用照明装置、表示装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2997404A4 (fr) * 2014-08-01 2017-03-08 Sct Technology, Ltd. Dispositif d'affichage et procédé pour réduire les effets de moiré à l'aide de celui-ci
JP2021022531A (ja) * 2019-07-30 2021-02-18 シャープ株式会社 照明装置、表示装置、及びテレビ受信装置
JP7273647B2 (ja) 2019-07-30 2023-05-15 シャープ株式会社 照明装置、表示装置、及びテレビ受信装置

Similar Documents

Publication Publication Date Title
JP5303660B2 (ja) 照明装置、表示装置およびテレビ受信装置
JP5538495B2 (ja) 液晶表示装置モジュール
WO2011152133A1 (fr) Dispositif d'éclairage, dispositif d'affichage et dispositif récepteur de télévision
WO2012023322A1 (fr) Dispositif d'éclairage, dispositif d'affichage et téléviseur
WO2011074354A1 (fr) Dispositif d'éclairage, dispositif d'affichage et récepteur de télévision
WO2014038503A1 (fr) Dispositif d'affichage et récepteur de télévision
WO2012081395A1 (fr) Dispositif d'éclairage et dispositif d'affichage à cristaux liquides le comportant
US20130038799A1 (en) Lighting device, display device and television receiver
WO2013021940A1 (fr) Dispositif d'éclairage, dispositif d'affichage et dispositif de réception de télévision
JP2013118117A (ja) 照明装置、表示装置、及びテレビ受信装置
JP5662952B2 (ja) 照明装置、表示装置、及びテレビ受信装置
JP5331245B2 (ja) 照明装置、表示装置及びテレビ受信装置
US20110141402A1 (en) Lighting device, display device and television receiver
WO2011067994A1 (fr) Dispositif d'éclairage, dispositif d'affichage, et dispositif de réception de télévision
WO2013018648A1 (fr) Dispositif d'éclairage, dispositif d'affichage et dispositif de réception de télévision
WO2011086814A1 (fr) Dispositif d'éclairage, appareil d'affichage et appareil récepteur de télévision
WO2011040427A1 (fr) Dispositif d'éclairage, dispositif d'affichage et dispositif de réception de télévision
WO2014181566A1 (fr) Dispositif d'éclairage, dispositif d'affichage, et dispositif de réception de télévision
KR20070119453A (ko) 액정표시장치의 백라이트 유닛
WO2010140413A1 (fr) Dispositif d'eclairage, dispositif d'affichage et dispositif televiseur
WO2013018646A1 (fr) Dispositif d'éclairage, dispositif d'affichage et dispositif de réception de la télévision
WO2013031672A1 (fr) Dispositif d'éclairage, dispositif d'affichage et dispositif récepteur de télévision
JP2014074756A (ja) 表示装置、及びテレビ受信装置
JP2013206574A (ja) 照明装置、表示装置、及びテレビ受信装置
JP6203518B2 (ja) バックライト装置及びこれを含む液晶表示装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12819631

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12819631

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP