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WO2012020592A1 - Illumination device and display device - Google Patents

Illumination device and display device Download PDF

Info

Publication number
WO2012020592A1
WO2012020592A1 PCT/JP2011/062446 JP2011062446W WO2012020592A1 WO 2012020592 A1 WO2012020592 A1 WO 2012020592A1 JP 2011062446 W JP2011062446 W JP 2011062446W WO 2012020592 A1 WO2012020592 A1 WO 2012020592A1
Authority
WO
WIPO (PCT)
Prior art keywords
guide plate
light guide
side end
light
pressing member
Prior art date
Application number
PCT/JP2011/062446
Other languages
French (fr)
Japanese (ja)
Inventor
良武 石元
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 WO2012020592A1 publication Critical patent/WO2012020592A1/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133322—Mechanical guidance or alignment of LCD panel support components
    • 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
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/46—Fixing elements

Definitions

  • the present invention relates to a lighting device and a display device.
  • the liquid crystal display panel that displays images does not emit light.
  • the liquid crystal display panel is illuminated with light from the illumination device.
  • the illuminating device installed in the back surface side of a liquid crystal display panel is called the backlight unit etc., for example.
  • the backlight unit installed in the liquid crystal display device is roughly classified into two types, a direct type and an edge light type.
  • a light source is disposed directly under the liquid crystal display panel (a region facing the back surface of the liquid crystal display panel).
  • the light emitted from the light source illuminates the liquid crystal display panel via an optical sheet (such as a diffusion sheet, a lens sheet, and a polarizing sheet).
  • a light guide plate is disposed immediately below the liquid crystal display panel, and a light source is disposed so as to face a predetermined side end surface of the light guide plate.
  • a light source is disposed so as to face a predetermined side end surface of the light guide plate.
  • an edge light type backlight unit components such as a light guide plate and a light source are usually accommodated in an accommodation area of a housing (accommodating container).
  • the light guide plate is fixed in the housing region of the housing by bonding the housing and the light guide plate via a double-sided tape (see, for example, Patent Document 1).
  • This invention was made in order to solve the said subject, and it aims at providing the illuminating device and display apparatus which can improve the efficiency of the recombination work of a light-guide plate.
  • a lighting device includes a housing, a front surface housed in the housing and facing the illuminated body, a rear surface opposite to the front surface, and a front surface. And a light guide plate having a plurality of side end surfaces connected to the rear surface, and a press that is attached to the housing and holds the light guide plate by pressing a predetermined side end surface of the plurality of side end surfaces of the light guide plate And a member.
  • the pressing member is movable in an approaching direction, which is a direction approaching the light guide plate, and in a separating direction, which is a direction away from the light guide plate.
  • the pressing member in the configuration in which the light guide plate is held by pressing the predetermined side end surface of the light guide plate with the press member, the pressing member is moved in the approach direction (approaching the light guide plate). Direction) and a separating direction (a direction away from the light guide plate), by moving the pressing member in the separating direction, the pressing operation of the pressing member against the predetermined side end surface of the light guide plate is released.
  • the light guide plate can be moved freely without resistance. For this reason, it becomes easy to remove the light guide plate accommodated in the housing.
  • the light guide plate when the light guide plate is accommodated again in the casing, the light guide plate can be easily accommodated in the casing by keeping the pressing member moved in the separating direction. Then, after the light guide plate is accommodated in the housing, if the pressing member is moved in the approaching direction, a predetermined side end surface of the light guide plate is pressed by the pressing member, and the light guide plate is held.
  • the light guide plate can be easily attached to and detached from the housing, so that the efficiency of the light guide plate recombination work can be improved.
  • a member having at least an elastically deformable cushion body is a pressing member, and a predetermined side end surface of the light guide plate is pressed by the cushion body. If comprised in this way, even if a light guide plate expand
  • the cushion body is restored and deformed so that no gap is generated between the member (cushion body) and a predetermined side end surface of the light guide plate.
  • rattling of the light guide plate is suppressed. That is, the efficiency of the light guide plate recombination work can be improved without the light guide plate being held by the pressing member inadequately.
  • the pressing member in addition to the cushion body, has a movable body to which the cushion body is fixed. It is preferable that it is attached to the housing so as to be movable in the separating direction. If comprised in this way, by suitably moving a movable body to an approach direction and a separation
  • the movable body further includes a fastening member for fastening the housing and the movable body, and a through hole for inserting the fastening member is formed in the movable body.
  • the opening shape of the through hole of the movable body is a long hole shape that is long in the approaching direction and the separating direction, and the casing and the movable body by the fastening member are inserted in the through hole of the movable body. It is preferable that fastening with is made.
  • a press member (movable body) can be easily moved to an approach direction and a separation direction by weakening the fastening between the housing
  • the fastening between the casing and the movable body by the fastening member is strengthened, the pressing member (movable body) is firmly attached to the casing, and the pressing member is prevented from being detached from the casing. be able to.
  • the fastening member is a screw member, and the fastening member inserted into the through hole of the movable body is screwed into the housing.
  • the casing and the movable body are preferably fastened by a fastening member. If comprised in this way, the case and the movable body by a fastening member can be easily fastened.
  • the pressing member includes a plurality of pressing members, and a predetermined number of pressing members are arranged on each side of the pair of side end surfaces facing the opposite directions of the light guide plate.
  • the predetermined side end surfaces (side end surfaces pressed by the pressing member) of the light guide plate are a pair of side end surfaces facing in opposite directions. If comprised in this way, each of a pair of side end surface which faces the mutually opposite direction of a light-guide plate can be pressed with a press member. And if each of a pair of side end surface which faces a mutually reverse direction of a light-guide plate is pressed with a press member, holding
  • the outer shape of the light guide plate in a plan view from the side facing the front surface of the light guide plate is square.
  • one side end surface of the pair of side end surfaces facing the opposite directions of the light guide plate is pressed by the pressing member, and the pair of light guide plates facing the opposite direction to each other
  • the other side end surface of the side end surfaces may be in contact with a non-movable member different from the pressing member.
  • a predetermined number of pressing members are arranged on each side of the pair of side end surfaces facing the opposite directions of the light guide plate (each of the pair of side end surfaces facing the opposite direction of the light guide plate is pressed member)
  • the light guide plate can be reliably held in the same manner as in the case of pressing with a).
  • the pressing member only needs to be arranged on one side end surface of the pair of side end surfaces facing in opposite directions of the light guide plate, so that the number of pressing members used is reduced, and the cost is reduced. Connected.
  • the non-movable member may be a member having at least a cushion body that can be elastically deformed, or the non-movable member may be a positioning pin.
  • the display device includes the illumination device according to the first aspect and a display panel illuminated with light from the illumination device.
  • the efficiency of the light guide plate recombination work can be improved.
  • This display device is a liquid crystal display device, and as shown in FIG. 1, a liquid crystal display panel 10 for displaying an image, and a backlight unit 20 installed on the back surface side opposite to the display surface side of the liquid crystal display panel 10. And at least.
  • the liquid crystal display panel 10 is an example of the “illuminated body” and the “display panel” in the present invention.
  • the backlight unit 20 is an example of the “lighting device” in the present invention.
  • the liquid crystal display device further includes a bezel BZ as a casing, and the liquid crystal display panel 10 and the backlight unit 20 are covered from the display surface side of the liquid crystal display panel 10 by the bezel BZ.
  • the liquid crystal display panel 10 has a display area where an image is actually displayed and a non-display area which is an outer edge area of the display area. A plurality of pixels arranged in a matrix are formed in the display area of the liquid crystal display panel 10.
  • Each of the plurality of pixels is driven by a switching element, a pixel electrode, a common electrode, and the like. Note that the switching element, the pixel electrode, and the common electrode are not shown in order to make the drawing easy to see, and wirings that are electrically connected to them are not shown.
  • the switching element is made of a TFT (thin film transistor), the gate of the switching element is connected to a gate line (scanning line), and the source of the switching element is connected to a source line (data line).
  • a pixel electrode is connected to the drain of the switching element, a common electrode is disposed so as to face the pixel electrode, and a liquid crystal (not shown) is sandwiched between the pixel electrode and the common electrode.
  • the switching elements are individually provided for each pixel, and the pixel electrodes are also individually provided for each pixel.
  • the common electrode is common to each pixel.
  • the optical property (light transmittance) of the liquid crystal is changed for each pixel based on the video signal. Specifically, in each pixel, an electric field is generated between the pixel electrode and the common electrode by supplying predetermined power to the pixel electrode via the switching element. The orientation of the liquid crystal, that is, the transmittance of light transmitted through the liquid crystal is changed by the electric field generated between the pixel electrode and the common electrode.
  • the liquid crystal display panel 10 includes at least two transparent substrates 11 and 12 as shown in FIG.
  • One transparent substrate 11 is referred to as an active matrix substrate, and the other transparent substrate 12 may be referred to as a counter substrate because it is disposed opposite to the transparent substrate 11, or a color substrate.
  • a switching element and a pixel electrode are formed, and a gate line (scanning line) and a source line (data line) electrically connected to them are also formed.
  • a common electrode is formed on a predetermined surface of the other transparent substrate 12.
  • a color filter is further formed on the predetermined surface of the other transparent substrate 12 as necessary.
  • Each predetermined surface of the two transparent electrodes 11 and 12 is covered with an alignment film (not shown) capable of aligning the liquid crystal in a specific direction.
  • the two transparent substrates 11 and 12 are bonded to each other via a seal material (not shown) so that their predetermined surfaces face each other.
  • a liquid crystal is sealed between the two transparent substrates 11 and 12.
  • the liquid crystal is sandwiched between the pixel electrode and the common electrode (between the alignment film covering the predetermined surface of one transparent substrate 11 and the alignment film covering the predetermined surface of the other transparent electrode 12). ing.
  • the outer sizes of the two transparent substrates 11 and 12 are different from each other, and the outer size of the transparent substrate 11 is larger than the outer size of the transparent substrate 12. Accordingly, the two transparent substrates 11 and 12 are bonded to each other, but the predetermined ends of the transparent substrates 11 and 12 do not match each other, and a part of the predetermined surface of the transparent substrate 11 is separated from the transparent substrate 12. Exposed. The exposed portion of the predetermined surface of the transparent substrate 11 is a region of a non-display area, and is used for electrically connecting a driver (not shown) to the transparent substrate 11.
  • a polarizing sheet 13 that transmits only light waves in a specific vibration direction is attached to each of the surfaces of the two transparent substrates 11 and 12 opposite to the predetermined surfaces (surfaces on the liquid crystal side). Yes.
  • the transmission axis directions of the two polarizing sheets 13 are shifted from each other by about 90 °.
  • the backlight unit 20 installed on the back side of the liquid crystal display panel 10 is an edge light type, and includes a back chassis 21, a reflection sheet 22, a light guide plate 23, At least an optical sheet 24 and a light source module 25 are provided.
  • the back chassis 21 is an example of the “housing” in the present invention.
  • the back chassis 21 is formed in a substantially box shape with the liquid crystal display panel 10 side opened. That is, the back chassis 21 has a bottom portion and side portions erected on the outer periphery of the bottom portion. An area surrounded by the bottom and sides of the back chassis 21 is an accommodation area, and the reflection sheet 22, the light guide plate 23, the optical sheet 24, and the light source module 25 are accommodated in the accommodation area of the back chassis 21. Is done.
  • the reflection sheet 22 is placed on the inner surface (bottom surface) of the bottom of the back chassis 21. That is, due to the presence of the reflection sheet 22, the inner surface (bottom surface) of the bottom portion of the back chassis 21 is a light reflection surface.
  • the light guide plate 23 introduces light from the light source module 25 and emits the light toward the liquid crystal display panel 10 side.
  • the light guide plate 23 is formed on the front surface 23a and the rear surface 23b opposite to the front surface 23a, and on the front surface 23a and the rear surface 23b. And a plurality of side end surfaces connected to each other, and is placed on the inner surface (bottom surface) of the bottom portion of the back chassis 21 via the reflection sheet 22.
  • the front surface 23 a of the light guide plate 23 is directed toward the liquid crystal display panel 10, and the rear surface 23 b of the light guide plate 23 is directed toward the bottom side of the back chassis 21.
  • the front surface 23a of the light guide plate 23 becomes a light emitting surface for emitting light introduced into the light guide plate 23 (light from the light source module 25) toward the liquid crystal display panel 10 side.
  • the rear surface 23b of the light guide plate 23 is covered with the reflection sheet 22, it does not become a light emission surface.
  • the outer shape of the light guide plate 23 (planar shapes of the front surface 23a and the rear surface 23b) is substantially rectangular.
  • the light guide plate 23 has four side end faces 23c to 23f.
  • the side end surface 23c is a light incident surface on which light from the light source module 25 is incident. That is, light from the light source module 25 is introduced into the light guide plate 23 through the side end surface 23 c of the light guide plate 23.
  • the side end surfaces 23c and 23d of the light guide plate 23 are surfaces that face in opposite directions and are parallel to the longitudinal direction (X direction) of the light guide plate 23 in plan view. Further, the side end surfaces 23e and 23f of the light guide plate 23 are surfaces facing in opposite directions to each other and parallel to the short direction (Y direction) of the light guide plate 23 in plan view.
  • the optical sheet 24 shown in FIGS. 1 and 2 includes a diffusion sheet, a lens sheet, and the like, and is placed on the front surface (light emitting surface) 23a of the light guide plate 23.
  • the optical sheet 24 diffuses or collects light emitted from the front surface (light emitting surface) 23a of the light guide plate 23.
  • the light source module 25 is for generating light (light introduced into the light guide plate 23) as a base of backlight light, and is disposed on the side end surface (light incident surface) 23c side of the light guide plate 23.
  • the number of light source modules 25 used is not particularly limited.
  • the light source module 25 may be further added, and the added light source module 25 may be disposed on the side end face 23 d side of the light guide plate 23.
  • the side end face 23d of the light guide plate 23 may also function as a light incident surface.
  • the light source module 25 has a structure in which a plurality of LEDs 27 are mounted on a mounting surface 26a of the same printed circuit board 26. Note that the number of LEDs 27 mounted is not particularly limited, and can be changed according to the application.
  • the printed circuit board 26 is made of an FPC (flexible printed wiring board) formed in a strip shape, and the mounting surface 26a is held so as to face the side end surface (light incident surface) 23c of the light guide plate 23. For this reason, the LED 27 mounted on the mounting surface 26 a of the printed circuit board 26 also faces the side end surface (light incident surface) 23 c of the light guide plate 23. Accordingly, when light is emitted from the LED 27, the light enters the side end face (light incident surface) 23 c of the light guide plate 23 and is introduced into the light guide plate 23.
  • FPC flexible printed wiring board
  • the LED 27 is a white LED, for example, a combination of a phosphor that converts blue (blue-violet) LED light into yellow and a blue LED (blue-violet LED). Note that a combination of a phosphor that converts blue (blue-violet) LED light into green and red and a blue LED (blue-violet LED) may be used as LED 27, and three types of blue LED, green LED, and red LED may be used. It is good also as what combined LED of LED27.
  • the light guide plate 23 In order to make the light from the light source module 25 incident on the side end surface (light incident surface) 23c of the light guide plate 23 efficiently, the light guide plate 23 must be accurately positioned in the accommodation region of the back chassis 21. Is required.
  • a positioning member that is a member different from the back chassis 21 is attached to the bottom of the back chassis 21, and the positioning member (positioning pin 31). And the pressing member 32) are used to position the light guide plate 23 in the accommodation area of the back chassis 21 with high accuracy.
  • the positioning pin 31 and the pressing member 32 are not shown in FIG.
  • the number of positioning pins 31 used as positioning members is two, and one recess 23g for fitting the positioning pin 31 is formed on each of the side end surfaces 23e and 23f of the light guide plate 23.
  • the concave portion 23g of the light guide plate 23 is formed by a notch cut in a U shape in the X direction from the respective surfaces of the side end surfaces 23e and 23f, and the center of each of the side end surfaces 23e and 23f in the Y direction. It is arranged in the part.
  • the reflective sheet 22 is also formed with a recess 22a (see FIG. 1) into which the positioning pin 31 is fitted.
  • the positioning pin 31 is fitted into the recess 23g of the light guide plate 23, so that the positioning pin 31 is in contact with the inner wall of the recess 23g of the light guide plate 23 in the Y direction. That is, no gap exists between the inner wall of the recess 23 g of the light guide plate 23 and the positioning pin 31 in the Y direction. Thereby, the light guide plate 23 is positioned in the Y direction.
  • the constituent material and shape of the positioning pin 31 are not particularly limited and can be changed according to the application.
  • the constituent material of the positioning pin 31 is a metal (aluminum, stainless steel, etc.), and the shape of the positioning pin 31 is a cylindrical shape.
  • the number of pressing members 32 used as positioning members is four, and two pressing members 32 are arranged on each side of the side end faces 23e and 23f of the light guide plate 23.
  • the two pressing members 32 positioned on the side end face 23 e side of the light guide plate 23 are respectively arranged with respect to one end and the other end in the Y direction of the side end face 23 e.
  • the two pressing members 32 that are arranged opposite to each other and located on the side end face 23f side of the light guide plate 23 are arranged to face each of one end and the other end in the Y direction of the side end face 23f.
  • the pressing member 32 presses the side end surface 23e of the light guide plate 23 in one direction in the X direction (the direction from the side end surface 23e toward the side end surface 23f), and the side end surface 23f of the light guide plate 23 in the X direction. Is pressed in the other direction opposite to the one direction (the direction from the side end face 23f toward the side end face 23e). That is, the side end faces 23e and 23f of the light guide plate 23 are pressed in opposite directions by the pressing member 32, and thereby the light guide plate 23 is held so as not to move in the X direction. Thereby, the light guide plate 23 is positioned in the X direction. When viewed in plan from the side facing the front surface 23 a of the light guide plate 23, the four corners (portions indicated by broken lines in FIG. 3) C of the light guide plate 23 are pressed by the pressing member 32. It is in the state.
  • the pressing member 32 is configured to be movable in the X direction.
  • the pressing member 32 is movable in an approach direction (X1 direction of the X direction) that is a direction approaching the light guide plate 23 and a separation direction (X2 direction of the X direction) that is a direction away from the light guide plate 23. It has become.
  • the pressing member 32 As a specific structure of the pressing member 32, a member having a movable body 33 as a main body and a cushion body 34 fixed to the movable body 33 is used as the pressing member 32.
  • the pressing member 32 is movable in the X direction by attaching the movable body 33 to the bottom of the back chassis 21 so as to be movable in the X direction.
  • the movable body 33 is composed of a substantially rectangular parallelepiped resin block made of polycarbonate resin, polystyrene resin, ABS (acrylonitrile-butadiene-styrene) resin, or the like. Moreover, the through-hole 33a is formed in the movable body 33, and the opening shape of the through-hole 33a of the movable body 33 is a long hole shape long in the X direction.
  • the attachment of the movable body 33 to the bottom of the back chassis 21 is performed by screwing the screw member 35 inserted into the through hole 33a of the movable body 33 into the bottom of the back chassis 21. That is, the bottom portion of the back chassis 21 and the movable body 33 are fastened by the screw member 35.
  • the pressing member 32 is equivalent to the length of the through hole 33a of the movable body 33 in the X direction. Can be moved in the X direction.
  • the screw member 35 is an example of the “fastening member” in the present invention.
  • the cushion body 34 is made of an elastically deformable cushion material (for example, urethane or sponge).
  • the position where the cushion body 34 is fixed to the movable body 33 is such a position that the cushion body 34 is sandwiched between the movable body 33 and the side end face 23e (23f) of the light guide plate 23.
  • the cushion body 34 comes into contact with the side end surface 23e (23f) of the light guide plate 23, and the cushion body 34 is elastically deformed ( Compression deformation). That is, an urging force that presses the side end face 23e (23f) of the light guide plate 23 is generated in the cushion body 34.
  • the light guide plate 23 is recombined by the method shown in FIGS.
  • the light guide plate 23 is accommodated in the accommodation region of the back chassis 21 and the light guide plate 23 is held (positioned) in the accommodation region of the back chassis 21 (the state shown in FIG. 6).
  • the pressing member 32 can be moved in the X direction by loosening the fastening between the bottom portion of the back chassis 21 and the movable body 33 by the screw member 35.
  • the pressing member 32 is moved in the X2 direction. Thereby, the pressing operation of the pressing member 32 against the side end face 23e (23f) of the light guide plate 23 is released, and the light guide plate 23 can be freely moved without resistance. That is, the light guide plate 23 can be removed from the accommodation area of the back chassis 21.
  • the pressing member 32 is moved in the X2 direction and remains in the accommodation area of the back chassis 21 in that state.
  • the light guide plate 23 is accommodated.
  • the cushion body 34 is brought into contact with the side end face 23e (23f) of the light guide plate 23, and the cushion body 34 is elastically deformed (compressed). Deformation). Furthermore, the fastening between the bottom portion of the back chassis 21 and the movable body 33 by the screw member 35 is strengthened so that the pressing member 32 does not move in the X direction.
  • the pressing member 32 can be moved in the X1 direction that is a direction approaching the light guide plate 23 (approach direction) and the X2 direction that is a direction away from the light guide plate 23 (separation direction).
  • the light guide plate 23 can be attached to and detached from the back chassis 21 by the method shown in FIGS. 6 and 7, so that the light guide plate 23 can be easily removed from the storage area of the back chassis 21.
  • the light guide plate 23 can be easily accommodated in the accommodation area. For this reason, it becomes possible to improve the efficiency of the recombination work of the light guide plate 23.
  • the member having at least the elastically deformable cushion body 34 is used as the pressing member 32, and the side end face 23e (23f) of the light guide plate 23 is pressed by the cushion body 34. Even if the light guide plate 23 expands and deforms due to heat, the cushion body 34 can absorb the expansion deformation of the light guide plate 23, so that the gap between the pressing member 32 and the side end face 23 e (23 f) of the light guide plate 23 is not limited. It is not necessary to provide a gap in advance. Further, when the pressing member 32 is pressing the side end face 23e (23f) of the light guide plate 23, the cushion body 34 is in an elastically deformed (compressed) state.
  • the cushion body 34 is restored and deformed so that no gap is generated between the pressing member 32 and the side end face 23e (23f) of the light guide plate 23.
  • the member further including the movable body 33 to which the cushion body 34 is fixed is used as the pressing member 32, and the movable body 33 can be moved in the X direction.
  • the movable body 33 By attaching the movable body 33 in the X direction by attaching it to the bottom of the back chassis 21, it is possible to easily release the pressing operation of the pressing member 32 against the side end face 23e (23f) of the light guide plate 23, or The pressing operation of the pressing member 32 against the side end surface 23e (23f) of 23 can be resumed. That is, the light guide plate 23 can be easily recombined.
  • the screw member 35 is inserted into the through hole (long hole in the X direction) 33 a of the movable body 33, and the screw member 35 is screwed into the bottom portion of the back chassis 21. If the fastening between the bottom of the back chassis 21 and the movable body 33 by the screw member 35 is weakened by fastening the bottom of the chassis 21 and the movable body 33, the pressing member 32 can be easily moved in the X direction. Can be. On the other hand, if the fastening between the bottom portion of the back chassis 21 and the movable body 33 by the screw member 35 is strengthened, the pressing member 32 is firmly attached to the bottom portion of the back chassis 21, and the pressing member 32 is attached to the back chassis 21. It can suppress that it remove
  • the light guide plate 23 is held in a well-balanced manner.
  • the processing time of the light guide plate 23 is shortened by making the shape of the positioning recess 23g formed in the light guide plate 23 U-shaped.
  • the efficiency of processing work can be increased.
  • all the pressing members 32 arranged on the respective side end surfaces 23e and 23f of the light guide plate 23 are movable in the X direction.
  • the present invention is not limited to this, and FIG. As shown, the pressure member 32 movable in the X direction is disposed only on the side end surface 23e side of the light guide plate 23, and the non-movable pressure member 42 is disposed on the side end surface 23f side of the light guide plate 23, The non-movable pressing member 42 may be brought into contact with the side end face 23 f of the light guide plate 23.
  • the non-movable pressing member 42 may be disposed on the side end surface 23e side of the light guide plate 23, and the pressing member 32 movable in the X direction may be disposed on the side end surface 23f side of the light guide plate 23.
  • the non-movable pressing member 42 is an example of the “non-movable member” in the present invention.
  • the structure of this non-movable pressing member 42 is preferably substantially the same as the structure of the pressing member 32 except that it is not movable in the X direction. That is, a fixed body 43 that is completely fixed to the bottom portion of the back chassis 21 and an elastically deformable cushion body that is fixed to the fixed body 43 (that actually contacts the side end face 23e of the light guide plate 23) 44 are provided.
  • the member having the non-movable pressing member 42 is preferably used.
  • each of the side end surfaces 23e and 23f of the light-guide plate 23 was pressed with the press member 32, this invention is not restricted to this, As shown in FIG. Only the end face 23e is pressed by the pressing member 32, and the inner wall of the recess 23g formed on the side end face 23f of the light guide plate 23 is brought into contact with the positioning pin 31 in the X direction, thereby positioning the light guide plate 23 in the X direction. You may make it perform.
  • the positioning pin 31 erected on the side end face 23f side of the light guide plate 23 corresponds to the “non-movable member” of the present invention.
  • the pressing member 32 only needs to be arranged on the side end face 23e side of the light guide plate 23. Therefore, the number of pressing members 32 used is reduced, leading to cost reduction. Needless to say, the same effect can be obtained when the pressing member 32 is disposed only on the side end face 23 f side of the light guide plate 23.
  • two pressing members 32 are arranged on each side of the side end faces 23e and 23f of the light guide plate 23.
  • the present invention is not limited to this, and the side end faces 23e and 23f of the light guide plate 23 are arranged.
  • One pressing member 32 may be disposed on each side, or three or more pressing members 32 may be disposed. Further, the number of pressing members 32 disposed on the respective side end surfaces 23e and 23f of the light guide plate 23 may be different from each other.
  • the pressing member 32 is attached to the bottom of the back chassis 21.
  • the present invention is not limited to this, and the pressing member 32 may be attached to the side of the back chassis 21.
  • the LED 27 is used as the light source of the backlight unit 20, but the present invention is not limited to this, and a cold cathode tube or the like may be used as the light source of the backlight unit 20.
  • the present invention is not limited to this, and the present invention may be applied to display devices other than the liquid crystal display device.

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

Abstract

Disclosed is an illumination device that makes it possible to increase the efficiency of light-guide panel replacement. Said illumination device is provided with: a light-guide panel (23) contained in a back chassis (21); and pressure members (32) that hold the light-guide panel (23) by pressing on side faces (23e and 23f) thereof. The pressure members (32) can move in a closure direction, i.e. towards the light-guide panel (23), and a separation direction, i.e. away from the light-guide panel (23).

Description

照明装置および表示装置Illumination device and display device
　本発明は、照明装置および表示装置に関する。 The present invention relates to a lighting device and a display device.
　表示装置の一つである液晶表示装置では、映像を表示する液晶表示パネルが非発光であるため、液晶表示パネルの裏面側（液晶表示パネルの表示面側とは反対側）に照明装置を設置し、その照明装置からの光で液晶表示パネルを照明するようになっている。なお、液晶表示パネルの裏面側に設置される照明装置は、たとえば、バックライトユニットなどと称されている。 In a liquid crystal display device, which is one of the display devices, the liquid crystal display panel that displays images does not emit light. The liquid crystal display panel is illuminated with light from the illumination device. In addition, the illuminating device installed in the back surface side of a liquid crystal display panel is called the backlight unit etc., for example.
　また、液晶表示装置に設置されるバックライトユニットは、大別すると直下型とエッジライト型との２種類に分類される。 In addition, the backlight unit installed in the liquid crystal display device is roughly classified into two types, a direct type and an edge light type.
　その構成を簡単に説明すると、直下型のバックライトユニットでは、液晶表示パネルの直下（液晶表示パネルの裏面と対向する領域）に光源が配置されている。そして、光源から発せられた光は、光学シート（拡散シート、レンズシートおよび偏光シートなど）を介して液晶表示パネルを照明する。 Briefly describing the configuration, in the direct type backlight unit, a light source is disposed directly under the liquid crystal display panel (a region facing the back surface of the liquid crystal display panel). The light emitted from the light source illuminates the liquid crystal display panel via an optical sheet (such as a diffusion sheet, a lens sheet, and a polarizing sheet).
　一方で、エッジライト型のバックライトユニットでは、液晶表示パネルの直下に導光板が配置され、その導光板の所定の側端面と対向するように光源が配置されている。エッジライト型のバックライトユニットの照明動作としては、光源から光が発せられると、その光が導光板の所定の側端面から導光板内に導入される。そして、導光板内に導入された光は、反復反射を繰り返して導光板の前面（液晶表示パネル側に向く面）から面状に出射した後、光学シートを介して液晶表示パネルを照明する。 On the other hand, in the edge light type backlight unit, a light guide plate is disposed immediately below the liquid crystal display panel, and a light source is disposed so as to face a predetermined side end surface of the light guide plate. As an illumination operation of the edge light type backlight unit, when light is emitted from the light source, the light is introduced into the light guide plate from a predetermined side end surface of the light guide plate. Then, the light introduced into the light guide plate is repeatedly reflected and emitted in a planar shape from the front surface (surface facing the liquid crystal display panel side) of the light guide plate, and then illuminates the liquid crystal display panel via the optical sheet.
　これら２種類のバックライトユニットは用途に応じて使い分けられるが、薄型に特化した液晶表示装置では、薄型化に有利なエッジライト型のバックライトユニットが採用される。 These two types of backlight units can be properly used according to the application, but in thin liquid crystal display devices, an edge light type backlight unit advantageous for thinning is adopted.
　ところで、エッジライト型のバックライトユニットでは、通常、導光板や光源などの構成部材を筐体（収容容器）の収容領域内に収容している。そして、たとえば、両面テープを介して筐体と導光板とを接着することによって、筐体の収容領域内において導光板を固定している（たとえば、特許文献１参照）。 By the way, in an edge light type backlight unit, components such as a light guide plate and a light source are usually accommodated in an accommodation area of a housing (accommodating container). For example, the light guide plate is fixed in the housing region of the housing by bonding the housing and the light guide plate via a double-sided tape (see, for example, Patent Document 1).
特開２００５－２３５７７１号公報Japanese Patent Laid-Open No. 2005-235771
　上記した特許文献１の構成では、両面テープを介して筐体と導光板とを接着しているため、筐体の収容領域内における導光板の固定は確実になる。しかしながら、両面テープを介して筐体と導光板とを接着すると、何らかの理由で導光板の組み換えを行わなければならない場合に、筐体の収容領域内から導光板を取り外すのが困難になる。すなわち、導光板の組み換え作業の効率が低下してしまう。 In the configuration of Patent Document 1 described above, since the housing and the light guide plate are bonded via the double-sided tape, the light guide plate is reliably fixed in the housing region of the housing. However, if the housing and the light guide plate are bonded via the double-sided tape, it becomes difficult to remove the light guide plate from the housing region when the light guide plate needs to be recombined for some reason. That is, the efficiency of the light guide plate recombination work is reduced.
　本発明は、上記課題を解決するためになされたものであり、導光板の組み換え作業の効率を向上させることが可能な照明装置および表示装置を提供することを目的とする。 This invention was made in order to solve the said subject, and it aims at providing the illuminating device and display apparatus which can improve the efficiency of the recombination work of a light-guide plate.
　上記目的を達成するために、本発明の第１の局面による照明装置は、筐体と、筐体に収容され、被照明体側に向くことになる前面および前面の反対面である後面と、前面および後面に繋がる複数の側端面とを有する導光板と、筐体に取り付けられているとともに、導光板の複数の側端面のうちの所定の側端面を押圧することで導光板の保持を行う押圧部材とを備えている。そして、押圧部材が導光板に近づく方向である接近方向および導光板から離れる方向である離間方向に移動可能になっている。 In order to achieve the above object, a lighting device according to a first aspect of the present invention includes a housing, a front surface housed in the housing and facing the illuminated body, a rear surface opposite to the front surface, and a front surface. And a light guide plate having a plurality of side end surfaces connected to the rear surface, and a press that is attached to the housing and holds the light guide plate by pressing a predetermined side end surface of the plurality of side end surfaces of the light guide plate And a member. The pressing member is movable in an approaching direction, which is a direction approaching the light guide plate, and in a separating direction, which is a direction away from the light guide plate.
　第１の局面による照明装置では、上記のように、導光板の所定の側端面を押圧部材で押圧することにより導光板を保持するようにした構成において、押圧部材を接近方向（導光板に近づく方向）および離間方向（導光板から離れる方向）に移動可能にすることによって、押圧部材を離間方向に移動させれば、導光板の所定の側端面に対する押圧部材の押圧動作が解除されるので、導光板を抵抗なく自由に移動させることができる。このため、筐体に収容された導光板を取り外すのが容易となる。 In the illumination device according to the first aspect, as described above, in the configuration in which the light guide plate is held by pressing the predetermined side end surface of the light guide plate with the press member, the pressing member is moved in the approach direction (approaching the light guide plate). Direction) and a separating direction (a direction away from the light guide plate), by moving the pressing member in the separating direction, the pressing operation of the pressing member against the predetermined side end surface of the light guide plate is released. The light guide plate can be moved freely without resistance. For this reason, it becomes easy to remove the light guide plate accommodated in the housing.
　一方、筐体に導光板を再度収容する場合には、押圧部材が離間方向に移動された状態にしておくことにより、筐体に導光板を収容するのが容易となる。そして、筐体に導光板を収容した後、押圧部材を接近方向に移動させれば、導光板の所定の側端面が押圧部材で押圧され、導光板が保持された状態になる。 On the other hand, when the light guide plate is accommodated again in the casing, the light guide plate can be easily accommodated in the casing by keeping the pressing member moved in the separating direction. Then, after the light guide plate is accommodated in the housing, if the pressing member is moved in the approaching direction, a predetermined side end surface of the light guide plate is pressed by the pressing member, and the light guide plate is held.
　このように、第１の局面による照明装置では、筐体に対する導光板の着脱が容易となるので、導光板の組み換え作業の効率を向上させることが可能となる。 As described above, in the lighting device according to the first aspect, the light guide plate can be easily attached to and detached from the housing, so that the efficiency of the light guide plate recombination work can be improved.
　第１の局面による照明装置において、弾性変形可能なクッション体を少なくとも有する部材が押圧部材とされており、クッション体で導光板の所定の側端面が押圧されることが好ましい。このように構成すれば、導光板が熱の影響で膨張変形したとしても、導光板の膨張変形をクッション体で吸収することができるので、押圧部材（クッション体）と導光板の所定の側端面との間に予め空隙を設けておく必要はない。さらに、導光板の所定の側端面を押圧部材（クッション体）が押圧しているときには、クッション体が弾性変形（圧縮変形）した状態となっているので、導光板が収縮変形したとしても、押圧部材（クッション体）と導光板の所定の側端面との間に空隙が生じないようにクッション体が復元変形する。これらのことにより、導光板のガタツキが抑制される。すなわち、押圧部材による導光板の保持が不十分になることなく、導光板の組み換え作業の効率を向上させることができる。 In the lighting device according to the first aspect, it is preferable that a member having at least an elastically deformable cushion body is a pressing member, and a predetermined side end surface of the light guide plate is pressed by the cushion body. If comprised in this way, even if a light guide plate expand | swells and deforms by the influence of heat, since the expansion deformation of a light guide plate can be absorbed with a cushion body, a predetermined side end surface of a pressing member (cushion body) and a light guide plate It is not necessary to provide a gap in advance. Further, when the pressing member (cushion body) is pressing the predetermined side end surface of the light guide plate, the cushion body is in an elastically deformed (compressed deformation) state. The cushion body is restored and deformed so that no gap is generated between the member (cushion body) and a predetermined side end surface of the light guide plate. As a result, rattling of the light guide plate is suppressed. That is, the efficiency of the light guide plate recombination work can be improved without the light guide plate being held by the pressing member inadequately.
　弾性変形可能なクッション体を少なくとも有する部材が押圧部材とされている構成において、クッション体に加えて、そのクッション体が固着される可動体を押圧部材が有しており、可動体が接近方向および離間方向に移動可能に筐体に取り付けられていることが好ましい。このように構成すれば、可動体を接近方向および離間方向に適宜移動させることによって、容易に、導光板の所定の側端面に対する押圧部材（クッション体）の押圧動作を解除したり、導光板の所定の側端面に対する押圧部材（クッション体）の押圧動作を再開したりすることができる。すなわち、容易に、導光板の組み換えを行うことができる。 In the configuration in which the member having at least the elastically deformable cushion body is the pressing member, in addition to the cushion body, the pressing member has a movable body to which the cushion body is fixed. It is preferable that it is attached to the housing so as to be movable in the separating direction. If comprised in this way, by suitably moving a movable body to an approach direction and a separation | spacing direction, the press operation of the press member (cushion body) with respect to the predetermined | prescribed side end surface of a light-guide plate can be cancelled | released easily, The pressing operation of the pressing member (cushion body) against the predetermined side end surface can be resumed. That is, the light guide plate can be easily recombined.
　クッション体および可動体を有する部材が押圧部材とされている構成において、筐体と可動体とを締結するための締結部材をさらに備え、締結部材を挿入するための貫通穴が可動体に形成されているとともに、その可動体の貫通穴の開口形状が接近方向および離間方向に長い長穴形状とされ、締結部材が可動体の貫通穴に挿入された状態で、締結部材による筐体と可動体との締結がなされていることが好ましい。このように構成すれば、締結部材による筐体と可動体との間の締結を弱めることによって、容易に、押圧部材（可動体）を接近方向および離間方向に移動可能にすることができる。一方で、締結部材による筐体と可動体との間の締結を強めれば、筐体に対する押圧部材（可動体）の取り付けが強固になり、押圧部材が筐体から外れてしまうのを抑制することができる。 In the configuration in which the member having the cushion body and the movable body is a pressing member, the movable body further includes a fastening member for fastening the housing and the movable body, and a through hole for inserting the fastening member is formed in the movable body. In addition, the opening shape of the through hole of the movable body is a long hole shape that is long in the approaching direction and the separating direction, and the casing and the movable body by the fastening member are inserted in the through hole of the movable body. It is preferable that fastening with is made. If comprised in this way, a press member (movable body) can be easily moved to an approach direction and a separation direction by weakening the fastening between the housing | casing by a fastening member and a movable body. On the other hand, if the fastening between the casing and the movable body by the fastening member is strengthened, the pressing member (movable body) is firmly attached to the casing, and the pressing member is prevented from being detached from the casing. be able to.
　筐体と可動体とを締結するための締結部材をさらに備えている構成において、締結部材がネジ部材であり、可動体の貫通穴に挿入された締結部材が筐体にねじ込まれていることによって、締結部材による筐体と可動体との締結がなされていることが好ましい。このように構成すれば、容易に、締結部材による筐体と可動体との締結を行うことができる。 In the configuration further including a fastening member for fastening the housing and the movable body, the fastening member is a screw member, and the fastening member inserted into the through hole of the movable body is screwed into the housing. The casing and the movable body are preferably fastened by a fastening member. If comprised in this way, the case and the movable body by a fastening member can be easily fastened.
　第１の局面による照明装置において、押圧部材が複数の押圧部材を含んでおり、導光板の互いに逆方向に向く一対の側端面のそれぞれの側に押圧部材が所定数ずつ配置されていることが好ましい。すなわち、導光板の所定の側端面（押圧部材で押圧される側端面）が互いに逆方向に向く一対の側端面であることが好ましい。このように構成すれば、導光板の互いに逆方向に向く一対の側端面のそれぞれを押圧部材で押圧することができる。そして、導光板の互いに逆方向に向く一対の側端面のそれぞれが押圧部材で押圧されると、導光板の保持が確実になる。 In the lighting device according to the first aspect, the pressing member includes a plurality of pressing members, and a predetermined number of pressing members are arranged on each side of the pair of side end surfaces facing the opposite directions of the light guide plate. preferable. That is, it is preferable that the predetermined side end surfaces (side end surfaces pressed by the pressing member) of the light guide plate are a pair of side end surfaces facing in opposite directions. If comprised in this way, each of a pair of side end surface which faces the mutually opposite direction of a light-guide plate can be pressed with a press member. And if each of a pair of side end surface which faces a mutually reverse direction of a light-guide plate is pressed with a press member, holding | maintenance of a light-guide plate will become reliable.
　導光板の互いに逆方向に向く一対の側端面のそれぞれの側に押圧部材が所定数ずつ配置されている構成において、導光板の前面と対向する側からの平面視における導光板の外形形状が四角形状とされている場合には、平面視における導光板の４つの隅部が押圧部材で押圧されるように、導光板の互いに逆方向に向く一対の側端面のそれぞれの側に押圧部材が２つずつ配置されていることが好ましい。このように構成すれば、導光板をバランス良く保持することができる。 In a configuration in which a predetermined number of pressing members are arranged on each side of a pair of side end surfaces facing in opposite directions of the light guide plate, the outer shape of the light guide plate in a plan view from the side facing the front surface of the light guide plate is square. In the case of the shape, there are two pressing members on each side of the pair of side end surfaces facing in opposite directions of the light guide plate so that the four corners of the light guide plate in plan view are pressed by the pressing member. It is preferable that they are arranged one by one. If comprised in this way, a light-guide plate can be hold | maintained with sufficient balance.
　さらに、第１の局面による照明装置において、導光板の互いに逆方向に向く一対の側端面のうちの一方の側端面が押圧部材で押圧されているとともに、導光板の互いに逆方向に向く一対の側端面のうちの他方の側端面が押圧部材とは異なる非可動部材に当接していてもよい。このように構成すれば、導光板の互いに逆方向に向く一対の側端面のそれぞれの側に押圧部材を所定数ずつ配置する（導光板の互いに逆方向に向く一対の側端面のそれぞれを押圧部材で押圧する）場合と同じように、導光板の保持を確実に行うことができる。なお、この構成では、導光板の互いに逆方向に向く一対の側端面のうちの一方の側端面の側にだけ押圧部材を配置すればよいので、押圧部材の使用数が削減され、コストダウンに繋がる。 Furthermore, in the illumination device according to the first aspect, one side end surface of the pair of side end surfaces facing the opposite directions of the light guide plate is pressed by the pressing member, and the pair of light guide plates facing the opposite direction to each other The other side end surface of the side end surfaces may be in contact with a non-movable member different from the pressing member. According to this structure, a predetermined number of pressing members are arranged on each side of the pair of side end surfaces facing the opposite directions of the light guide plate (each of the pair of side end surfaces facing the opposite direction of the light guide plate is pressed member) The light guide plate can be reliably held in the same manner as in the case of pressing with a). In this configuration, the pressing member only needs to be arranged on one side end surface of the pair of side end surfaces facing in opposite directions of the light guide plate, so that the number of pressing members used is reduced, and the cost is reduced. Connected.
　この場合、非可動部材が弾性変形可能なクッション体を少なくとも有する部材であってもよいし、非可動部材が位置決めピンであってもよい。 In this case, the non-movable member may be a member having at least a cushion body that can be elastically deformed, or the non-movable member may be a positioning pin.
　また、本発明の第２の局面による表示装置は、第１の局面による照明装置と、その照明装置からの光で照明される表示パネルとを備えている。 The display device according to the second aspect of the present invention includes the illumination device according to the first aspect and a display panel illuminated with light from the illumination device.
　このように構成された表示装置では、導光板の組み換え作業の効率を向上させることが可能となる。 In the display device configured as described above, the efficiency of the light guide plate recombination work can be improved.
　以上のように、本発明によれば、導光板の組み換え作業の効率を向上させることが可能な照明装置および表示装置を得ることができる。 As described above, according to the present invention, it is possible to obtain an illumination device and a display device that can improve the efficiency of the light guide plate recombination work.
本発明の一実施形態による照明装置を備えた表示装置の分解斜視図である（位置決めピンおよび押圧部材については省略）。It is a disassembled perspective view of the display apparatus provided with the illuminating device by one Embodiment of this invention (it abbreviate | omits about a positioning pin and a press member). 本発明の一実施形態による照明装置の一部（光源の周辺部分）を拡大した断面図である。It is sectional drawing which expanded a part (peripheral part of a light source) of the illuminating device by one Embodiment of this invention. 本発明の一実施形態による照明装置を導光板の前面と対向する側から見た場合の平面図である（光学シートについては省略）。It is a top view at the time of seeing the illuminating device by one Embodiment of this invention from the side facing the front surface of a light-guide plate (it abbreviate | omits about an optical sheet). 本発明の一実施形態による照明装置の一部（押圧部材の周辺部分）を拡大した断面図である。It is sectional drawing which expanded a part (peripheral part of a press member) of the illuminating device by one Embodiment of this invention. 本発明の一実施形態による照明装置の押圧部材の斜視図である。It is a perspective view of the pressing member of the illuminating device by one Embodiment of this invention. 本発明の一実施形態による照明装置の導光板を組み換える際の動作を説明するための図である。It is a figure for demonstrating the operation | movement at the time of recombining the light-guide plate of the illuminating device by one Embodiment of this invention. 本発明の一実施形態による照明装置の導光板を組み換える際の動作を説明するための図である。It is a figure for demonstrating the operation | movement at the time of recombining the light-guide plate of the illuminating device by one Embodiment of this invention. 本発明の変形例による照明装置を導光板の前面と対向する側から見た場合の平面図である（光学シートについては省略）。It is a top view at the time of seeing the illuminating device by the modification of this invention from the side facing the front surface of a light-guide plate (it abbreviate | omits about an optical sheet). 本発明の変形例による照明装置を導光板の前面と対向する側から見た場合の平面図である（光学シートについては省略）。It is a top view at the time of seeing the illuminating device by the modification of this invention from the side facing the front surface of a light-guide plate (it abbreviate | omits about an optical sheet).
　本発明の一実施形態による照明装置を備えた表示装置の構成について、図１～図７を参照して説明する。 The configuration of a display device including an illumination device according to an embodiment of the present invention will be described with reference to FIGS.
　この表示装置は液晶表示装置であって、図１に示すように、映像を表示する液晶表示パネル１０と、液晶表示パネル１０の表示面側とは反対の裏面側に設置されるバックライトユニット２０とを少なくとも備えている。なお、液晶表示パネル１０は、本発明の「被照明体」および「表示パネル」の一例である。また、バックライトユニット２０は、本発明の「照明装置」の一例である。 This display device is a liquid crystal display device, and as shown in FIG. 1, a liquid crystal display panel 10 for displaying an image, and a backlight unit 20 installed on the back surface side opposite to the display surface side of the liquid crystal display panel 10. And at least. The liquid crystal display panel 10 is an example of the “illuminated body” and the “display panel” in the present invention. The backlight unit 20 is an example of the “lighting device” in the present invention.
　また、液晶表示装置には筐体としてのベゼルＢＺがさらに備えられていて、そのベゼルＢＺによって、液晶表示パネル１０およびバックライトユニット２０が液晶表示パネル１０の表示面側から覆われている。 Further, the liquid crystal display device further includes a bezel BZ as a casing, and the liquid crystal display panel 10 and the backlight unit 20 are covered from the display surface side of the liquid crystal display panel 10 by the bezel BZ.
　液晶表示パネル１０は、実際に映像が表示される表示領域と、その表示領域の外縁領域である非表示領域とを有している。そして、液晶表示パネル１０の表示領域には、マトリクス状に配列された複数の画素が作り込まれている。 The liquid crystal display panel 10 has a display area where an image is actually displayed and a non-display area which is an outer edge area of the display area. A plurality of pixels arranged in a matrix are formed in the display area of the liquid crystal display panel 10.
　複数の画素のそれぞれは、スイッチング素子、画素電極および共通電極などによって駆動されるようになっている。なお、図面を見易くするため、スイッチング素子、画素電極および共通電極は図示しておらず、それらに対して電気的に接続される配線などについても図示していない。 Each of the plurality of pixels is driven by a switching element, a pixel electrode, a common electrode, and the like. Note that the switching element, the pixel electrode, and the common electrode are not shown in order to make the drawing easy to see, and wirings that are electrically connected to them are not shown.
　スイッチング素子はＴＦＴ（薄膜トランジスタ）からなっていて、スイッチング素子のゲートはゲート線（走査線）に接続され、スイッチング素子のソースはソース線（データ線）に接続される。また、スイッチング素子のドレインには画素電極が接続されるとともに、その画素電極と対向するように共通電極が配置され、さらに、画素電極と共通電極との間に液晶（図示せず）が挟持される。なお、スイッチング素子は各画素に個々に設けられており、画素電極も各画素に個々に設けられている。一方、共通電極については、その名の通り、各画素で共通となっている。 The switching element is made of a TFT (thin film transistor), the gate of the switching element is connected to a gate line (scanning line), and the source of the switching element is connected to a source line (data line). A pixel electrode is connected to the drain of the switching element, a common electrode is disposed so as to face the pixel electrode, and a liquid crystal (not shown) is sandwiched between the pixel electrode and the common electrode. The Note that the switching elements are individually provided for each pixel, and the pixel electrodes are also individually provided for each pixel. On the other hand, as the name indicates, the common electrode is common to each pixel.
　そして、表示動作の際には、映像信号に基づいて、液晶の光学的性質（光透過率）が画素毎に変化される。具体的には、各画素において、スイッチング素子を介して画素電極に所定の電力が供給されることにより、画素電極と共通電極との間に電界が発生される。そして、画素電極と共通電極との間に発生した電界によって、液晶の配向、すなわち、液晶を透過する光の透過率が変化される。 In the display operation, the optical property (light transmittance) of the liquid crystal is changed for each pixel based on the video signal. Specifically, in each pixel, an electric field is generated between the pixel electrode and the common electrode by supplying predetermined power to the pixel electrode via the switching element. The orientation of the liquid crystal, that is, the transmittance of light transmitted through the liquid crystal is changed by the electric field generated between the pixel electrode and the common electrode.
　このため、バックライトユニット２０からバックライト光が出射され、そのバックライト光によって液晶表示パネル１０の裏面が照明されると、液晶表示パネル１０を透過するバックライト光の透過量が画素毎に異ならされることになる。これにより、液晶表示パネル１０の表示面に所望の映像が表示される。 For this reason, when backlight light is emitted from the backlight unit 20 and the back surface of the liquid crystal display panel 10 is illuminated by the backlight light, the transmission amount of the backlight light transmitted through the liquid crystal display panel 10 is different for each pixel. Will be. As a result, a desired image is displayed on the display surface of the liquid crystal display panel 10.
　以下に、液晶表示パネル１０およびバックライトユニット２０の構成についてより詳細に説明する。 Hereinafter, the configuration of the liquid crystal display panel 10 and the backlight unit 20 will be described in more detail.
　液晶表示パネル１０は、図１に示すように、２枚の透明基板１１および１２を少なくとも備えている。一方の透明基板１１は、アクティブマトリクス基板と称されるものであって、他方の透明基板１２は、透明基板１１に対して対向配置されることから対向基板と称される場合もあるし、カラーフィルタ基板と称される場合もある。 The liquid crystal display panel 10 includes at least two transparent substrates 11 and 12 as shown in FIG. One transparent substrate 11 is referred to as an active matrix substrate, and the other transparent substrate 12 may be referred to as a counter substrate because it is disposed opposite to the transparent substrate 11, or a color substrate. Sometimes referred to as a filter substrate.
　一方の透明基板１１の所定面上には、スイッチング素子および画素電極が形成されているとともに、それらに電気的に接続されるゲート線（走査線）およびソース線（データ線）も形成されている。また、他方の透明基板１２の所定面上には、共通電極が形成されている。なお、他方の透明基板１２の所定面上には、共通電極に加えて、必要に応じてカラーフィルタがさらに形成される。そして、２枚の透明電極１１および１２のそれぞれの所定面は、液晶を特定方向に配向させることが可能な配向膜（図示せず）によって覆われている。 On a predetermined surface of one transparent substrate 11, a switching element and a pixel electrode are formed, and a gate line (scanning line) and a source line (data line) electrically connected to them are also formed. . A common electrode is formed on a predetermined surface of the other transparent substrate 12. In addition to the common electrode, a color filter is further formed on the predetermined surface of the other transparent substrate 12 as necessary. Each predetermined surface of the two transparent electrodes 11 and 12 is covered with an alignment film (not shown) capable of aligning the liquid crystal in a specific direction.
　また、２枚の透明基板１１および１２は、それぞれの所定面が向き合うように、シール材（図示せず）を介して互いに貼り合わされている。そして、２枚の透明基板１１および１２の間に液晶が封止されている。これによって、画素電極と共通電極との間（一方の透明基板１１の所定面を覆う配向膜と他方の透明電極１２の所定面を覆う配向膜との間）に液晶が挟持された状態となっている。 Also, the two transparent substrates 11 and 12 are bonded to each other via a seal material (not shown) so that their predetermined surfaces face each other. A liquid crystal is sealed between the two transparent substrates 11 and 12. As a result, the liquid crystal is sandwiched between the pixel electrode and the common electrode (between the alignment film covering the predetermined surface of one transparent substrate 11 and the alignment film covering the predetermined surface of the other transparent electrode 12). ing.
　さらに、２枚の透明基板１１および１２のそれぞれの外形サイズは互いに異ならされていて、透明基板１１の外形サイズが透明基板１２の外形サイズよりも大きくなっている。したがって、２枚の透明基板１１および１２は互いに貼り合わされているが、透明基板１１および１２のそれぞれの所定端は互いに合致しておらず、透明基板１１の所定面の一部が透明基板１２から露出されている。この透明基板１１の所定面の露出した部分は、非表示領域の一領域であって、透明基板１１にドライバ（図示せず）を電気的に接続するために用いられる。 Furthermore, the outer sizes of the two transparent substrates 11 and 12 are different from each other, and the outer size of the transparent substrate 11 is larger than the outer size of the transparent substrate 12. Accordingly, the two transparent substrates 11 and 12 are bonded to each other, but the predetermined ends of the transparent substrates 11 and 12 do not match each other, and a part of the predetermined surface of the transparent substrate 11 is separated from the transparent substrate 12. Exposed. The exposed portion of the predetermined surface of the transparent substrate 11 is a region of a non-display area, and is used for electrically connecting a driver (not shown) to the transparent substrate 11.
　また、２枚の透明基板１１および１２の所定面（液晶側の面）とは反対側の面のそれぞれには、特定の振動方向の光波だけを透過させる偏光シート１３が１枚ずつ貼付されている。そして、２枚の偏光シート１３のそれぞれの透過軸方向は、互いに約９０°ずらされている。 In addition, a polarizing sheet 13 that transmits only light waves in a specific vibration direction is attached to each of the surfaces of the two transparent substrates 11 and 12 opposite to the predetermined surfaces (surfaces on the liquid crystal side). Yes. The transmission axis directions of the two polarizing sheets 13 are shifted from each other by about 90 °.
　この液晶表示パネル１０の裏面側に設置されるバックライトユニット２０は、図１および図２に示すように、エッジライト型であって、バックシャーシ２１と、反射シート２２と、導光板２３と、光学シート２４と、光源モジュール２５とを少なくとも備えている。なお、バックシャーシ２１は、本発明の「筐体」の一例である。 As shown in FIGS. 1 and 2, the backlight unit 20 installed on the back side of the liquid crystal display panel 10 is an edge light type, and includes a back chassis 21, a reflection sheet 22, a light guide plate 23, At least an optical sheet 24 and a light source module 25 are provided. The back chassis 21 is an example of the “housing” in the present invention.
　バックシャーシ２１は、液晶表示パネル１０側が開口された略箱状に形成されている。すなわち、バックシャーシ２１は、底部と、その底部の外周に立設された側部とを有していることになる。そして、バックシャーシ２１の底部および側部で取り囲まれた領域が収容領域とされており、そのバックシャーシ２１の収容領域内に、反射シート２２、導光板２３、光学シート２４および光源モジュール２５が収容される。 The back chassis 21 is formed in a substantially box shape with the liquid crystal display panel 10 side opened. That is, the back chassis 21 has a bottom portion and side portions erected on the outer periphery of the bottom portion. An area surrounded by the bottom and sides of the back chassis 21 is an accommodation area, and the reflection sheet 22, the light guide plate 23, the optical sheet 24, and the light source module 25 are accommodated in the accommodation area of the back chassis 21. Is done.
　反射シート２２は、バックシャーシ２１の底部の内面（底面）上に載置されている。すなわち、この反射シート２２の存在によって、バックシャーシ２１の底部の内面（底面）が光反射面となっている。 The reflection sheet 22 is placed on the inner surface (bottom surface) of the bottom of the back chassis 21. That is, due to the presence of the reflection sheet 22, the inner surface (bottom surface) of the bottom portion of the back chassis 21 is a light reflection surface.
　導光板２３は、光源モジュール２５からの光を導入して液晶表示パネル１０側に向けて出射するためのものであって、前面２３ａおよびその反対面である後面２３ｂと、前面２３ａおよび後面２３ｂに繋がる複数の側端面とを有しているとともに、バックシャーシ２１の底部の内面（底面）上に反射シート２２を介して載置されている。そして、導光板２３の前面２３ａが液晶表示パネル１０側に向けられ、導光板２３の後面２３ｂがバックシャーシ２１の底部側に向けられている。 The light guide plate 23 introduces light from the light source module 25 and emits the light toward the liquid crystal display panel 10 side. The light guide plate 23 is formed on the front surface 23a and the rear surface 23b opposite to the front surface 23a, and on the front surface 23a and the rear surface 23b. And a plurality of side end surfaces connected to each other, and is placed on the inner surface (bottom surface) of the bottom portion of the back chassis 21 via the reflection sheet 22. The front surface 23 a of the light guide plate 23 is directed toward the liquid crystal display panel 10, and the rear surface 23 b of the light guide plate 23 is directed toward the bottom side of the back chassis 21.
　これにより、導光板２３の前面２３ａは、導光板２３内に導入された光（光源モジュール２５からの光）を液晶表示パネル１０側に向けて出射するための光出射面となる。一方で、導光板２３の後面２３ｂは、反射シート２２によって覆われるため、光出射面とはならない。 Thereby, the front surface 23a of the light guide plate 23 becomes a light emitting surface for emitting light introduced into the light guide plate 23 (light from the light source module 25) toward the liquid crystal display panel 10 side. On the other hand, since the rear surface 23b of the light guide plate 23 is covered with the reflection sheet 22, it does not become a light emission surface.
　また、導光板２３の前面２３ａと対向する側からの平面視（図３参照）においては、導光板２３の外形形状（前面２３ａおよび後面２３ｂの平面形状）は略長方形状となっている。このため、導光板２３は、４つの側端面２３ｃ～２３ｆを有していることになる。そして、この導光板２３の４つの側端面２３ｃ～２３ｆのうちの側端面２３ｃは、光源モジュール２５からの光が入射する光入射面となっている。すなわち、導光板２３の側端面２３ｃを介して、光源モジュール２５からの光が導光板２３内に導入される。 Further, in a plan view from the side facing the front surface 23a of the light guide plate 23 (see FIG. 3), the outer shape of the light guide plate 23 (planar shapes of the front surface 23a and the rear surface 23b) is substantially rectangular. For this reason, the light guide plate 23 has four side end faces 23c to 23f. Of the four side end surfaces 23c to 23f of the light guide plate 23, the side end surface 23c is a light incident surface on which light from the light source module 25 is incident. That is, light from the light source module 25 is introduced into the light guide plate 23 through the side end surface 23 c of the light guide plate 23.
　なお、導光板２３の側端面２３ｃおよび２３ｄは、互いに逆方向を向き、かつ、平面視における導光板２３の長手方向（Ｘ方向）に平行になっている面である。また、導光板２３の側端面２３ｅおよび２３ｆは、互いに逆方向を向き、かつ、平面視における導光板２３の短手方向（Ｙ方向）に平行になっている面である。 The side end surfaces 23c and 23d of the light guide plate 23 are surfaces that face in opposite directions and are parallel to the longitudinal direction (X direction) of the light guide plate 23 in plan view. Further, the side end surfaces 23e and 23f of the light guide plate 23 are surfaces facing in opposite directions to each other and parallel to the short direction (Y direction) of the light guide plate 23 in plan view.
　また、図１および図２に示す光学シート２４は、拡散シートやレンズシートなどを含んでおり、導光板２３の前面（光出射面）２３ａ上に載置されている。そして、この光学シート２４によって、導光板２３の前面（光出射面）２３ａから出射された光の拡散や集光などが行われる。 The optical sheet 24 shown in FIGS. 1 and 2 includes a diffusion sheet, a lens sheet, and the like, and is placed on the front surface (light emitting surface) 23a of the light guide plate 23. The optical sheet 24 diffuses or collects light emitted from the front surface (light emitting surface) 23a of the light guide plate 23.
　光源モジュール２５は、バックライト光の基となる光（導光板２３内に導入される光）を生成するためのものであって、導光板２３の側端面（光入射面）２３ｃの側に配置されている。なお、光源モジュール２５の使用数は特に限定されるものではない。たとえば、図示しないが、光源モジュール２５をさらに追加し、その追加した光源モジュール２５を導光板２３の側端面２３ｄ側に配置するようにしてもよい。言い換えると、導光板２３の側端面２３ｃに加えて、導光板２３の側端面２３ｄも光入射面として機能させてもよい。 The light source module 25 is for generating light (light introduced into the light guide plate 23) as a base of backlight light, and is disposed on the side end surface (light incident surface) 23c side of the light guide plate 23. Has been. The number of light source modules 25 used is not particularly limited. For example, although not illustrated, the light source module 25 may be further added, and the added light source module 25 may be disposed on the side end face 23 d side of the light guide plate 23. In other words, in addition to the side end face 23c of the light guide plate 23, the side end face 23d of the light guide plate 23 may also function as a light incident surface.
　光源モジュール２５の構造としては、同一のプリント基板２６の実装面２６ａに複数のＬＥＤ２７が実装されたものとなっている。なお、ＬＥＤ２７の実装数は特に限定されるものではなく、用途に応じて変更可能である。 The light source module 25 has a structure in which a plurality of LEDs 27 are mounted on a mounting surface 26a of the same printed circuit board 26. Note that the number of LEDs 27 mounted is not particularly limited, and can be changed according to the application.
　プリント基板２６は、短冊状に形成されたＦＰＣ（フレキシブルプリント配線板）などからなっていて、その実装面２６ａが導光板２３の側端面（光入射面）２３ｃと向き合うように保持されている。このため、プリント基板２６の実装面２６ａに実装されたＬＥＤ２７も導光板２３の側端面（光入射面）２３ｃと対向することになる。これにより、ＬＥＤ２７から光が発せられると、その光が導光板２３の側端面（光入射面）２３ｃに入射して導光板２３内に導入される。 The printed circuit board 26 is made of an FPC (flexible printed wiring board) formed in a strip shape, and the mounting surface 26a is held so as to face the side end surface (light incident surface) 23c of the light guide plate 23. For this reason, the LED 27 mounted on the mounting surface 26 a of the printed circuit board 26 also faces the side end surface (light incident surface) 23 c of the light guide plate 23. Accordingly, when light is emitted from the LED 27, the light enters the side end face (light incident surface) 23 c of the light guide plate 23 and is introduced into the light guide plate 23.
　ＬＥＤ２７は白色ＬＥＤであって、たとえば、青色（青紫色）のＬＥＤ光を黄色に変換する蛍光体と青色ＬＥＤ（青紫色ＬＥＤ）とを組み合わせたものである。なお、青色（青紫色）のＬＥＤ光を緑色および赤色にそれぞれ変換する蛍光体と青色ＬＥＤ（青紫色ＬＥＤ）とを組み合わせたものをＬＥＤ２７としてもよく、青色ＬＥＤ、緑色ＬＥＤおよび赤色ＬＥＤの３種類のＬＥＤを組み合わせたものをＬＥＤ２７としてもよい。 The LED 27 is a white LED, for example, a combination of a phosphor that converts blue (blue-violet) LED light into yellow and a blue LED (blue-violet LED). Note that a combination of a phosphor that converts blue (blue-violet) LED light into green and red and a blue LED (blue-violet LED) may be used as LED 27, and three types of blue LED, green LED, and red LED may be used. It is good also as what combined LED of LED27.
　ところで、光源モジュール２５からの光を導光板２３の側端面（光入射面）２３ｃに効率的に入射させるためには、バックシャーシ２１の収容領域内において導光板２３を精度良く位置決めしておくことが必要となる。 By the way, in order to make the light from the light source module 25 incident on the side end surface (light incident surface) 23c of the light guide plate 23 efficiently, the light guide plate 23 must be accurately positioned in the accommodation region of the back chassis 21. Is required.
　したがって、本実施形態では、図３に示すように、バックシャーシ２１とは異なる部材である位置決め部材（位置決めピン３１および押圧部材３２）をバックシャーシ２１の底部に取り付け、その位置決め部材（位置決めピン３１および押圧部材３２）を用いてバックシャーシ２１の収容領域内における導光板２３の位置決めを精度良く行うようにしている。なお、図面の簡略化のため、位置決めピン３１および押圧部材３２は図１には図示していない。 Therefore, in this embodiment, as shown in FIG. 3, a positioning member (positioning pin 31 and pressing member 32) that is a member different from the back chassis 21 is attached to the bottom of the back chassis 21, and the positioning member (positioning pin 31). And the pressing member 32) are used to position the light guide plate 23 in the accommodation area of the back chassis 21 with high accuracy. For simplification of the drawing, the positioning pin 31 and the pressing member 32 are not shown in FIG.
　位置決め部材としての位置決めピン３１の使用数は２本とされていて、その位置決めピン３１を嵌め込むための凹部２３ｇが導光板２３の側端面２３ｅおよび２３ｆのそれぞれに１つずつ形成されている。この導光板２３の凹部２３ｇは、側端面２３ｅおよび２３ｆのそれぞれの表面からＸ方向にＵ字状に切り込まれた切り欠きからなっているとともに、側端面２３ｅおよび２３ｆのそれぞれのＹ方向における中心部に配置されている。なお、図３には図示しないが、反射シート２２にも、位置決めピン３１が嵌め込まれる凹部２２ａ（図１参照）が形成されている。 The number of positioning pins 31 used as positioning members is two, and one recess 23g for fitting the positioning pin 31 is formed on each of the side end surfaces 23e and 23f of the light guide plate 23. The concave portion 23g of the light guide plate 23 is formed by a notch cut in a U shape in the X direction from the respective surfaces of the side end surfaces 23e and 23f, and the center of each of the side end surfaces 23e and 23f in the Y direction. It is arranged in the part. Although not shown in FIG. 3, the reflective sheet 22 is also formed with a recess 22a (see FIG. 1) into which the positioning pin 31 is fitted.
　そして、導光板２３の凹部２３ｇに位置決めピン３１が嵌め込まれ、それによって、Ｙ方向において導光板２３の凹部２３ｇの内壁に位置決めピン３１が当接した状態となっている。すなわち、Ｙ方向においては、導光板２３の凹部２３ｇの内壁と位置決めピン３１との間に空隙は存在しない。これにより、導光板２３のＹ方向における位置決めがなされている。 Then, the positioning pin 31 is fitted into the recess 23g of the light guide plate 23, so that the positioning pin 31 is in contact with the inner wall of the recess 23g of the light guide plate 23 in the Y direction. That is, no gap exists between the inner wall of the recess 23 g of the light guide plate 23 and the positioning pin 31 in the Y direction. Thereby, the light guide plate 23 is positioned in the Y direction.
　この位置決めピン３１の構成材料や形状は特に限定されるものではなく、用途に応じて変更可能である。たとえば、本実施形態では、位置決めピン３１の構成材料を金属（アルミニウムやステンレスなど）とし、位置決めピン３１の形状を円柱形状としている。 The constituent material and shape of the positioning pin 31 are not particularly limited and can be changed according to the application. For example, in this embodiment, the constituent material of the positioning pin 31 is a metal (aluminum, stainless steel, etc.), and the shape of the positioning pin 31 is a cylindrical shape.
　また、位置決め部材としての押圧部材３２の使用数は４つであって、その押圧部材３２は導光板２３の側端面２３ｅおよび２３ｆのそれぞれの側に２つずつ配置されている。押圧部材３２の具体的な配置位置としては、導光板２３の側端面２３ｅの側に位置する２つの押圧部材３２は、側端面２３ｅのＹ方向における一方端部および他方端部のそれぞれに対して対向配置され、導光板２３の側端面２３ｆの側に位置する２つの押圧部材３２は、側端面２３ｆのＹ方向における一方端部および他方端部のそれぞれに対して対向配置されている。 Further, the number of pressing members 32 used as positioning members is four, and two pressing members 32 are arranged on each side of the side end faces 23e and 23f of the light guide plate 23. As specific arrangement positions of the pressing members 32, the two pressing members 32 positioned on the side end face 23 e side of the light guide plate 23 are respectively arranged with respect to one end and the other end in the Y direction of the side end face 23 e. The two pressing members 32 that are arranged opposite to each other and located on the side end face 23f side of the light guide plate 23 are arranged to face each of one end and the other end in the Y direction of the side end face 23f.
　そして、この押圧部材３２によって、導光板２３の側端面２３ｅがＸ方向の一方向（側端面２３ｅから側端面２３ｆに向かう方向）に押圧されているとともに、導光板２３の側端面２３ｆがＸ方向の一方向とは反対の他方向（側端面２３ｆから側端面２３ｅに向かう方向）に押圧されている。すなわち、導光板２３の側端面２３ｅおよび２３ｆが押圧部材３２によって互いに逆方向に押圧され、それによって、導光板２３がＸ方向に移動しないように保持されている。これにより、導光板２３のＸ方向における位置決めがなされている。なお、導光板２３の前面２３ａと対向する側から平面的に見た場合には、導光板２３の４つの隅部（図３中の破線で示された部分）Ｃが押圧部材３２で押圧された状態となっている。 The pressing member 32 presses the side end surface 23e of the light guide plate 23 in one direction in the X direction (the direction from the side end surface 23e toward the side end surface 23f), and the side end surface 23f of the light guide plate 23 in the X direction. Is pressed in the other direction opposite to the one direction (the direction from the side end face 23f toward the side end face 23e). That is, the side end faces 23e and 23f of the light guide plate 23 are pressed in opposite directions by the pressing member 32, and thereby the light guide plate 23 is held so as not to move in the X direction. Thereby, the light guide plate 23 is positioned in the X direction. When viewed in plan from the side facing the front surface 23 a of the light guide plate 23, the four corners (portions indicated by broken lines in FIG. 3) C of the light guide plate 23 are pressed by the pressing member 32. It is in the state.
　ここで、本実施形態では、押圧部材３２がＸ方向に移動可能な構造とされている。言い換えると、押圧部材３２は、導光板２３に近づく方向である接近方向（Ｘ方向のうちのＸ１方向）および導光板２３から離れる方向である離間方向（Ｘ方向のうちのＸ２方向）に移動可能になっている。 Here, in this embodiment, the pressing member 32 is configured to be movable in the X direction. In other words, the pressing member 32 is movable in an approach direction (X1 direction of the X direction) that is a direction approaching the light guide plate 23 and a separation direction (X2 direction of the X direction) that is a direction away from the light guide plate 23. It has become.
　押圧部材３２の具体的な構造としては、本体としての可動体３３と、可動体３３に固着されるクッション体３４とを有する部材が押圧部材３２とされている。そして、Ｘ方向に移動可能になるようにバックシャーシ２１の底部に可動体３３が取り付けられていることによって、押圧部材３２がＸ方向に移動可能になっている。 As a specific structure of the pressing member 32, a member having a movable body 33 as a main body and a cushion body 34 fixed to the movable body 33 is used as the pressing member 32. The pressing member 32 is movable in the X direction by attaching the movable body 33 to the bottom of the back chassis 21 so as to be movable in the X direction.
　可動体３３は、図３～図５に示すように、ポリカーボネート樹脂、ポリスチレン樹脂およびＡＢＳ（アクリロニトリル－ブタジエン－スチレン）樹脂などを構成材料とする略直方体の樹脂ブロックからなっている。また、可動体３３には貫通穴３３ａが形成されていて、その可動体３３の貫通穴３３ａの開口形状はＸ方向に長い長穴形状とされている。 As shown in FIGS. 3 to 5, the movable body 33 is composed of a substantially rectangular parallelepiped resin block made of polycarbonate resin, polystyrene resin, ABS (acrylonitrile-butadiene-styrene) resin, or the like. Moreover, the through-hole 33a is formed in the movable body 33, and the opening shape of the through-hole 33a of the movable body 33 is a long hole shape long in the X direction.
　バックシャーシ２１の底部に対する可動体３３の取り付けは、可動体３３の貫通穴３３ａに挿入したネジ部材３５をバックシャーシ２１の底部にねじ込むことでなされている。すなわち、ネジ部材３５によって、バックシャーシ２１の底部と可動体３３とが締結されていることになる。このようになっていると、ネジ部材３５によるバックシャーシ２１の底部と可動体３３との間の締結を緩めれば、可動体３３の貫通穴３３ａのＸ方向の長さ分だけ、押圧部材３２をＸ方向に移動させることが可能となる。なお、ネジ部材３５は、本発明の「締結部材」の一例である。 The attachment of the movable body 33 to the bottom of the back chassis 21 is performed by screwing the screw member 35 inserted into the through hole 33a of the movable body 33 into the bottom of the back chassis 21. That is, the bottom portion of the back chassis 21 and the movable body 33 are fastened by the screw member 35. In this case, if the fastening between the bottom portion of the back chassis 21 and the movable body 33 by the screw member 35 is loosened, the pressing member 32 is equivalent to the length of the through hole 33a of the movable body 33 in the X direction. Can be moved in the X direction. The screw member 35 is an example of the “fastening member” in the present invention.
　クッション体３４は、弾性変形可能なクッション材（たとえば、ウレタンやスポンジなど）からなっている。このクッション体３４の可動体３３に対する固着位置としては、可動体３３と導光板２３の側端面２３ｅ（２３ｆ）との間にクッション体３４が挟み込まれるような位置とされている。そして、押圧部材３２によって導光板２３の側端面２３ｅ（２３ｆ）が押圧されているときには、クッション体３４が導光板２３の側端面２３ｅ（２３ｆ）に当接し、かつ、クッション体３４が弾性変形（圧縮変形）している。すなわち、導光板２３の側端面２３ｅ（２３ｆ）を押圧するような付勢力がクッション体３４に発生している。 The cushion body 34 is made of an elastically deformable cushion material (for example, urethane or sponge). The position where the cushion body 34 is fixed to the movable body 33 is such a position that the cushion body 34 is sandwiched between the movable body 33 and the side end face 23e (23f) of the light guide plate 23. When the side end surface 23e (23f) of the light guide plate 23 is pressed by the pressing member 32, the cushion body 34 comes into contact with the side end surface 23e (23f) of the light guide plate 23, and the cushion body 34 is elastically deformed ( Compression deformation). That is, an urging force that presses the side end face 23e (23f) of the light guide plate 23 is generated in the cushion body 34.
　このような可動体３３およびクッション体３４を有する押圧部材３２を位置決め部材として用いれば、図６および図７に示すような方法で導光板２３の組み換え作業が行われることになる。 When the pressing member 32 having the movable body 33 and the cushion body 34 is used as a positioning member, the light guide plate 23 is recombined by the method shown in FIGS.
　すなわち、バックシャーシ２１の収容領域内に導光板２３が収容され、かつ、バックシャーシ２１の収容領域内において導光板２３が保持（位置決め）された状態（図６に示す状態）から導光板２３を取り外す場合には、まず、ネジ部材３５によるバックシャーシ２１の底部と可動体３３との間の締結を緩めることによって、押圧部材３２をＸ方向に移動可能とする。 That is, the light guide plate 23 is accommodated in the accommodation region of the back chassis 21 and the light guide plate 23 is held (positioned) in the accommodation region of the back chassis 21 (the state shown in FIG. 6). In the case of removing, first, the pressing member 32 can be moved in the X direction by loosening the fastening between the bottom portion of the back chassis 21 and the movable body 33 by the screw member 35.
　そして、図７に示すように、押圧部材３２をＸ２方向に移動させる。これにより、導光板２３の側端面２３ｅ（２３ｆ）に対する押圧部材３２の押圧動作が解除され、導光板２３を抵抗なく自由に移動させることができるようになる。つまり、バックシャーシ２１の収容領域内から導光板２３を取り外すことが可能な状態となる。 Then, as shown in FIG. 7, the pressing member 32 is moved in the X2 direction. Thereby, the pressing operation of the pressing member 32 against the side end face 23e (23f) of the light guide plate 23 is released, and the light guide plate 23 can be freely moved without resistance. That is, the light guide plate 23 can be removed from the accommodation area of the back chassis 21.
　次に、バックシャーシ２１の収容領域内に導光板２３を再度収容する際には、押圧部材３２がＸ２方向に移動された状態にしておき、その状態のまま、バックシャーシ２１の収容領域内に導光板２３を収容する。 Next, when the light guide plate 23 is accommodated again in the accommodation area of the back chassis 21, the pressing member 32 is moved in the X2 direction and remains in the accommodation area of the back chassis 21 in that state. The light guide plate 23 is accommodated.
　続いて、押圧部材３２をＸ１方向に移動させることによって、図６に示したように、クッション体３４を導光板２３の側端面２３ｅ（２３ｆ）に当接させ、クッション体３４を弾性変形（圧縮変形）させる。さらに、ネジ部材３５によるバックシャーシ２１の底部と可動体３３との間の締結を強め、押圧部材３２がＸ方向に移動しないようにする。 Subsequently, by moving the pressing member 32 in the X1 direction, as shown in FIG. 6, the cushion body 34 is brought into contact with the side end face 23e (23f) of the light guide plate 23, and the cushion body 34 is elastically deformed (compressed). Deformation). Furthermore, the fastening between the bottom portion of the back chassis 21 and the movable body 33 by the screw member 35 is strengthened so that the pressing member 32 does not move in the X direction.
　これによって、導光板２３の側端面２３ｅ（２３ｆ）をＸ１方向に押圧するような付勢力がクッション体３４に発生し、導光板２３の側端面２３ｅ（２３ｆ）が押圧部材３２によってＸ１方向に押圧される。その結果、バックシャーシ２１の収容領域内において、導光板２３がＸ方向に移動しないように保持され、導光板２３のＸ方向の位置決めがなされる。なお、言うまでもないが、導光板２３のＹ方向の位置決めについては、位置決めピン３１（図３参照）によってなされる。 As a result, an urging force that presses the side end face 23e (23f) of the light guide plate 23 in the X1 direction is generated in the cushion body 34, and the side end face 23e (23f) of the light guide plate 23 is pressed in the X1 direction by the pressing member 32. Is done. As a result, in the accommodation area of the back chassis 21, the light guide plate 23 is held so as not to move in the X direction, and the light guide plate 23 is positioned in the X direction. Needless to say, the positioning of the light guide plate 23 in the Y direction is performed by positioning pins 31 (see FIG. 3).
　本実施形態では、上記のように、押圧部材３２を導光板２３に近づく方向（接近方向）であるＸ１方向および導光板２３から離れる方向（離間方向）であるＸ２方向に移動可能にすることによって、図６および図７に示した方法でバックシャーシ２１に対する導光板２３の着脱を行うことができるので、バックシャーシ２１の収容領域内からの導光板２３の取り外しが容易となり、さらに、バックシャーシ２１の収容領域内への導光板２３の収容も容易となる。このため、導光板２３の組み換え作業の効率を向上させることが可能となる。 In the present embodiment, as described above, the pressing member 32 can be moved in the X1 direction that is a direction approaching the light guide plate 23 (approach direction) and the X2 direction that is a direction away from the light guide plate 23 (separation direction). The light guide plate 23 can be attached to and detached from the back chassis 21 by the method shown in FIGS. 6 and 7, so that the light guide plate 23 can be easily removed from the storage area of the back chassis 21. The light guide plate 23 can be easily accommodated in the accommodation area. For this reason, it becomes possible to improve the efficiency of the recombination work of the light guide plate 23.
　また、本実施形態では、上記のように、弾性変形可能なクッション体３４を少なくとも有する部材を押圧部材３２とし、そのクッション体３４で導光板２３の側端面２３ｅ（２３ｆ）を押圧することによって、導光板２３が熱の影響で膨張変形したとしても、導光板２３の膨張変形をクッション体３４で吸収することができるので、押圧部材３２と導光板２３の側端面２３ｅ（２３ｆ）との間に予め空隙を設けておく必要はない。さらに、導光板２３の側端面２３ｅ（２３ｆ）を押圧部材３２が押圧しているときには、クッション体３４が弾性変形（圧縮変形）した状態となっているので、導光板２３が収縮変形したとしても、押圧部材３２と導光板２３の側端面２３ｅ（２３ｆ）との間に空隙が生じないようにクッション体３４が復元変形する。これらのことにより、導光板２３のガタツキが抑制される。すなわち、押圧部材３２による導光板２３の保持が不十分になることなく、導光板２３の組み換え作業の効率を向上させることができる。 In the present embodiment, as described above, the member having at least the elastically deformable cushion body 34 is used as the pressing member 32, and the side end face 23e (23f) of the light guide plate 23 is pressed by the cushion body 34. Even if the light guide plate 23 expands and deforms due to heat, the cushion body 34 can absorb the expansion deformation of the light guide plate 23, so that the gap between the pressing member 32 and the side end face 23 e (23 f) of the light guide plate 23 is not limited. It is not necessary to provide a gap in advance. Further, when the pressing member 32 is pressing the side end face 23e (23f) of the light guide plate 23, the cushion body 34 is in an elastically deformed (compressed) state. The cushion body 34 is restored and deformed so that no gap is generated between the pressing member 32 and the side end face 23e (23f) of the light guide plate 23. By these things, the shakiness of the light-guide plate 23 is suppressed. That is, the efficiency of recombination work of the light guide plate 23 can be improved without the light guide plate 23 being held by the pressing member 32 inadequately.
　また、本実施形態では、上記のように、クッション体３４に加えて、そのクッション体３４が固着される可動体３３をさらに有する部材を押圧部材３２とし、可動体３３をＸ方向に移動可能にバックシャーシ２１の底部に取り付けることによって、可動体３３をＸ方向に適宜移動させることにより、容易に、導光板２３の側端面２３ｅ（２３ｆ）に対する押圧部材３２の押圧動作を解除したり、導光板２３の側端面２３ｅ（２３ｆ）に対する押圧部材３２の押圧動作を再開したりすることができる。すなわち、容易に、導光板２３の組み換えを行うことができる。 In the present embodiment, as described above, in addition to the cushion body 34, the member further including the movable body 33 to which the cushion body 34 is fixed is used as the pressing member 32, and the movable body 33 can be moved in the X direction. By attaching the movable body 33 in the X direction by attaching it to the bottom of the back chassis 21, it is possible to easily release the pressing operation of the pressing member 32 against the side end face 23e (23f) of the light guide plate 23, or The pressing operation of the pressing member 32 against the side end surface 23e (23f) of 23 can be resumed. That is, the light guide plate 23 can be easily recombined.
　また、本実施形態では、上記のように、可動体３３の貫通穴（Ｘ方向に長い長穴）３３ａにネジ部材３５を挿入し、そのネジ部材３５をバックシャーシ２１の底部にねじ込むことでバックシャーシ２１の底部と可動体３３とを締結することによって、ネジ部材３５によるバックシャーシ２１の底部と可動体３３との間の締結を弱めれば、容易に、押圧部材３２をＸ方向に移動可能にすることができる。一方で、ネジ部材３５によるバックシャーシ２１の底部と可動体３３との間の締結を強めれば、バックシャーシ２１の底部への押圧部材３２の取り付けが強固になり、押圧部材３２がバックシャーシ２１の底部から外れてしまうのを抑制することができる。 In the present embodiment, as described above, the screw member 35 is inserted into the through hole (long hole in the X direction) 33 a of the movable body 33, and the screw member 35 is screwed into the bottom portion of the back chassis 21. If the fastening between the bottom of the back chassis 21 and the movable body 33 by the screw member 35 is weakened by fastening the bottom of the chassis 21 and the movable body 33, the pressing member 32 can be easily moved in the X direction. Can be. On the other hand, if the fastening between the bottom portion of the back chassis 21 and the movable body 33 by the screw member 35 is strengthened, the pressing member 32 is firmly attached to the bottom portion of the back chassis 21, and the pressing member 32 is attached to the back chassis 21. It can suppress that it remove | deviates from the bottom part.
　また、本実施形態では、上記のように、導光板２３の側端面２３ｅおよび２３ｆを押圧部材３２で互いに逆方向に押圧することによって、導光板２３のＸ方向への移動が規制されるので、導光板２３の保持が確実になされる。さらに、本実施形態では、導光板２３の４つの隅部Ｃが押圧部材３２で押圧された状態となっているので、導光板２３の保持がバランス良く行われる。 In the present embodiment, as described above, by pressing the side end surfaces 23e and 23f of the light guide plate 23 in the opposite directions with the pressing member 32, the movement of the light guide plate 23 in the X direction is restricted. The light guide plate 23 is securely held. Furthermore, in this embodiment, since the four corners C of the light guide plate 23 are pressed by the pressing member 32, the light guide plate 23 is held in a well-balanced manner.
　また、本実施形態では、上記のように、導光板２３に形成する位置決め用の凹部２３ｇの形状をＵ字形状にすることによって、導光板２３の加工時間が短縮されるので、導光板２３の加工作業の効率を高めることができる。 In this embodiment, as described above, the processing time of the light guide plate 23 is shortened by making the shape of the positioning recess 23g formed in the light guide plate 23 U-shaped. The efficiency of processing work can be increased.
　今回開示された実施形態は、すべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は、上記した実施形態の説明ではなく特許請求の範囲によって示され、さらに、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれる。 The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and includes all modifications within the meaning and scope equivalent to the scope of claims for patent.
　たとえば、上記実施形態では、導光板２３の側端面２３ｅおよび２３ｆのそれぞれの側に配置される全ての押圧部材３２をＸ方向に移動可能としたが、本発明はこれに限らず、図８に示すように、導光板２３の側端面２３ｅの側にのみＸ方向に移動可能な押圧部材３２を配置するとともに、導光板２３の側端面２３ｆの側には非可動の押圧部材４２を配置し、導光板２３の側端面２３ｆに非可動の押圧部材４２を当接させるようにしてもよい。もちろん、導光板２３の側端面２３ｅの側に非可動の押圧部材４２を配置し、導光板２３の側端面２３ｆの側にＸ方向に移動可能な押圧部材３２を配置してもよい。なお、非可動の押圧部材４２は、本発明の「非可動部材」の一例である。 For example, in the above embodiment, all the pressing members 32 arranged on the respective side end surfaces 23e and 23f of the light guide plate 23 are movable in the X direction. However, the present invention is not limited to this, and FIG. As shown, the pressure member 32 movable in the X direction is disposed only on the side end surface 23e side of the light guide plate 23, and the non-movable pressure member 42 is disposed on the side end surface 23f side of the light guide plate 23, The non-movable pressing member 42 may be brought into contact with the side end face 23 f of the light guide plate 23. Of course, the non-movable pressing member 42 may be disposed on the side end surface 23e side of the light guide plate 23, and the pressing member 32 movable in the X direction may be disposed on the side end surface 23f side of the light guide plate 23. The non-movable pressing member 42 is an example of the “non-movable member” in the present invention.
　この非可動の押圧部材４２の構造としては、Ｘ方向に移動可能になっていないこと以外は、押圧部材３２の構造と略同じであることが好ましい。すなわち、バックシャーシ２１の底部に完全に固定される固定体４３と、その固定体４３に固着される弾性変形可能なクッション体（導光板２３の側端面２３ｅと実際に当接するもの）４４とを有する部材が非可動の押圧部材４２とされていることが好ましい。 The structure of this non-movable pressing member 42 is preferably substantially the same as the structure of the pressing member 32 except that it is not movable in the X direction. That is, a fixed body 43 that is completely fixed to the bottom portion of the back chassis 21 and an elastically deformable cushion body that is fixed to the fixed body 43 (that actually contacts the side end face 23e of the light guide plate 23) 44 are provided. The member having the non-movable pressing member 42 is preferably used.
　また、上記実施形態では、導光板２３の側端面２３ｅおよび２３ｆのそれぞれを押圧部材３２で押圧するようにしたが、本発明はこれに限らず、図９に示すように、導光板２３の側端面２３ｅのみを押圧部材３２で押圧し、導光板２３の側端面２３ｆに形成された凹部２３ｇの内壁と位置決めピン３１とをＸ方向において当接させることによって、導光板２３のＸ方向における位置決めを行うようにしてもよい。なお、この変形例においては、導光板２３の側端面２３ｆの側に立設された位置決めピン３１が本発明の「非可動部材」に相当する。 Moreover, in the said embodiment, although each of the side end surfaces 23e and 23f of the light-guide plate 23 was pressed with the press member 32, this invention is not restricted to this, As shown in FIG. Only the end face 23e is pressed by the pressing member 32, and the inner wall of the recess 23g formed on the side end face 23f of the light guide plate 23 is brought into contact with the positioning pin 31 in the X direction, thereby positioning the light guide plate 23 in the X direction. You may make it perform. In this modification, the positioning pin 31 erected on the side end face 23f side of the light guide plate 23 corresponds to the “non-movable member” of the present invention.
　図９に示した変形例では、導光板２３の側端面２３ｅの側にだけ押圧部材３２を配置すればよいので、押圧部材３２の使用数が削減され、コストダウンに繋がる。なお、言うまでもないが、導光板２３の側端面２３ｆの側にだけ押圧部材３２を配置した場合においても、同じ効果が得られる。 In the modification shown in FIG. 9, the pressing member 32 only needs to be arranged on the side end face 23e side of the light guide plate 23. Therefore, the number of pressing members 32 used is reduced, leading to cost reduction. Needless to say, the same effect can be obtained when the pressing member 32 is disposed only on the side end face 23 f side of the light guide plate 23.
　また、上記実施形態では、導光板２３の側端面２３ｅおよび２３ｆのそれぞれの側に押圧部材３２を２つずつ配置したが、本発明はこれに限らず、導光板２３の側端面２３ｅおよび２３ｆのそれぞれの側に配置される押圧部材３２が１つずつであってもよいし、３つ以上ずつであってもよい。また、導光板２３の側端面２３ｅおよび２３ｆのそれぞれの側に配置される押圧部材３２の個数が互いに異なっていてもよい。 In the above embodiment, two pressing members 32 are arranged on each side of the side end faces 23e and 23f of the light guide plate 23. However, the present invention is not limited to this, and the side end faces 23e and 23f of the light guide plate 23 are arranged. One pressing member 32 may be disposed on each side, or three or more pressing members 32 may be disposed. Further, the number of pressing members 32 disposed on the respective side end surfaces 23e and 23f of the light guide plate 23 may be different from each other.
　また、上記実施形態では、押圧部材３２をバックシャーシ２１の底部に取り付けるようにしたが、本発明はこれに限らず、押圧部材３２をバックシャーシ２１の側部に取り付けるようにしてもよい。 In the above embodiment, the pressing member 32 is attached to the bottom of the back chassis 21. However, the present invention is not limited to this, and the pressing member 32 may be attached to the side of the back chassis 21.
　また、上記実施形態では、バックライトユニット２０の光源としてＬＥＤ２７を用いたが、本発明はこれに限らず、冷陰極管などをバックライトユニット２０の光源としてもよい。 In the above embodiment, the LED 27 is used as the light source of the backlight unit 20, but the present invention is not limited to this, and a cold cathode tube or the like may be used as the light source of the backlight unit 20.
　また、上記実施形態では、液晶表示装置に本発明を適用する例について説明したが、本発明はこれに限らず、液晶表示装置以外の表示装置に本発明を適用してもよい。 In the above embodiment, the example in which the present invention is applied to the liquid crystal display device has been described. However, the present invention is not limited to this, and the present invention may be applied to display devices other than the liquid crystal display device.
　　１０　液晶表示パネル（表示パネル）
　　２０　バックライトユニット（照明装置）
　　２１　バックシャーシ（筐体）
　　２３　導光板
　　２３ａ　前面
　　２３ｂ　後面
　　２３ｃ、２３ｄ　側端面
　　２３ｅ、２３ｆ　側端面（所定の側端面）
　　３１　位置決めピン（非可動部材）
　　３２　押圧部材
　　３３　可動体
　　３３ａ　貫通穴
　　３４　クッション体
　　３５　ネジ部材（締結部材）
　　４２　非可動の押圧部材（非可動部材）
　　４３　固定体
　　４４　クッション体
　　Ｃ　隅部 10 Liquid crystal display panel (display panel)
20 Backlight unit (lighting device)
21 Back chassis (housing)
23 light guide plate 23a front surface 23b rear surface 23c, 23d side end surface 23e, 23f side end surface (predetermined side end surface)
31 Positioning pin (non-movable member)
32 Pressing member 33 Movable body 33a Through hole 34 Cushioning body 35 Screw member (fastening member)
42 Non-movable pressing member (non-movable member)
43 Fixed body 44 Cushion body C Corner

Claims (11)

  1. 　筐体と、
    　前記筐体に収容され、被照明体側に向くことになる前面および前記前面の反対面である後面と、前記前面および前記後面に繋がる複数の側端面とを有する導光板と、
    　前記筐体に取り付けられているとともに、前記導光板の複数の側端面のうちの所定の側端面を押圧することで前記導光板の保持を行う押圧部材とを備え、
    　前記押圧部材が前記導光板に近づく方向である接近方向および前記導光板から離れる方向である離間方向に移動可能になっていることを特徴とする照明装置。     A housing,
    A light guide plate having a front surface accommodated in the housing and facing the illuminated body side, a rear surface opposite to the front surface, and a plurality of side end surfaces connected to the front surface and the rear surface;
    A pressing member that is attached to the housing and holds the light guide plate by pressing a predetermined side end surface of the plurality of side end surfaces of the light guide plate;
    The illuminating device, wherein the pressing member is movable in an approach direction that is a direction approaching the light guide plate and a separation direction that is a direction away from the light guide plate.
  2. 　弾性変形可能なクッション体を少なくとも有する部材が前記押圧部材とされており、
    　前記クッション体で前記導光板の所定の側端面が押圧されることを特徴とする請求項１に記載の照明装置。     A member having at least an elastically deformable cushion body is the pressing member,
    The lighting device according to claim 1, wherein a predetermined side end surface of the light guide plate is pressed by the cushion body.
  3. 　前記クッション体に加えて、前記クッション体が固着される可動体を前記押圧部材が有しており、
    　前記可動体が前記接近方向および前記離間方向に移動可能に前記筐体に取り付けられていることを特徴とする請求項２に記載の照明装置。     In addition to the cushion body, the pressing member has a movable body to which the cushion body is fixed,
    The lighting device according to claim 2, wherein the movable body is attached to the housing so as to be movable in the approaching direction and the separating direction.
  4. 　前記筐体と前記可動体とを締結するための締結部材をさらに備え、
    　前記締結部材を挿入するための貫通穴が前記可動体に形成されているとともに、前記可動体の貫通穴の開口形状が前記接近方向および前記離間方向に長い長穴形状とされ、
    　前記締結部材が前記可動体の貫通穴に挿入された状態で、前記締結部材による前記筐体と前記可動体との締結がなされていることを特徴とする請求項３に記載の照明装置。     A fastening member for fastening the housing and the movable body;
    A through hole for inserting the fastening member is formed in the movable body, and an opening shape of the through hole of the movable body is a long hole shape in the approaching direction and the separating direction,
    The lighting device according to claim 3, wherein the casing and the movable body are fastened by the fastening member in a state where the fastening member is inserted into the through hole of the movable body.
  5. 　前記締結部材がネジ部材であり、
    　前記可動体の貫通穴に挿入された前記締結部材が前記筐体にねじ込まれていることによって、前記締結部材による前記筐体と前記可動体との締結がなされていることを特徴とする請求項４に記載の照明装置。     The fastening member is a screw member;
    The fastening member inserted into the through hole of the movable body is screwed into the casing, whereby the casing and the movable body are fastened by the fastening member. 4. The lighting device according to 4.
  6. 　前記押圧部材が複数の押圧部材を含んでおり、
    　前記導光板の互いに逆方向に向く一対の側端面のそれぞれの側に前記押圧部材が所定数ずつ配置されていることを特徴とする請求項１～５のいずれかに記載の照明装置。     The pressing member includes a plurality of pressing members;
    6. The lighting device according to claim 1, wherein a predetermined number of the pressing members are arranged on each side of a pair of side end surfaces facing in opposite directions of the light guide plate.
  7. 　前記導光板の前面と対向する側からの平面視における前記導光板の外形形状が四角形状とされており、
    　平面視における前記導光板の４つの隅部が前記押圧部材で押圧されるように、前記導光板の互いに逆方向に向く一対の側端面のそれぞれの側に前記押圧部材が２つずつ配置されていることを特徴とする請求項６に記載の照明装置。     The outer shape of the light guide plate in a plan view from the side facing the front surface of the light guide plate is a square shape,
    Two pressing members are arranged on each side of a pair of side end surfaces facing in opposite directions of the light guide plate so that the four corners of the light guide plate in plan view are pressed by the pressing member. The lighting device according to claim 6.
  8. 　前記導光板の互いに逆方向に向く一対の側端面のうちの一方の側端面が前記押圧部材で押圧されているとともに、前記導光板の互いに逆方向に向く一対の側端面のうちの他方の側端面が前記押圧部材とは異なる非可動部材に当接していることを特徴とする請求項１～５のいずれかに記載の照明装置。 One side end surface of a pair of side end surfaces facing in opposite directions of the light guide plate is pressed by the pressing member, and the other side of the pair of side end surfaces facing in opposite directions of the light guide plate. The lighting device according to any one of claims 1 to 5, wherein an end surface is in contact with a non-movable member different from the pressing member.
  9. 　前記非可動部材が弾性変形可能なクッション体を少なくとも有する部材であることを特徴とする請求項８に記載の照明装置。 The lighting device according to claim 8, wherein the non-movable member is a member having at least a cushion body that can be elastically deformed.
  10. 　前記非可動部材が位置決めピンであることを特徴とする請求項８に記載の照明装置。 The lighting device according to claim 8, wherein the non-movable member is a positioning pin.
  11. 　請求項１～１０のいずれかに記載の照明装置と、
    　前記照明装置からの光で照明される表示パネルとを備えていることを特徴とする表示装置。     The lighting device according to any one of claims 1 to 10,
    And a display panel illuminated with light from the illumination device.
PCT/JP2011/062446 2010-08-09 2011-05-31 Illumination device and display device WO2012020592A1 (en)

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JP2013178334A (en) * 2012-02-28 2013-09-09 Sharp Corp Display device and television receiver
US20150212262A1 (en) * 2014-01-29 2015-07-30 Innolux Corporation Backlight module and display comprising the same
CN111897042A (en) * 2020-07-23 2020-11-06 苏州伊尔顿光电科技有限公司 Novel light guide plate
WO2022009525A1 (en) * 2020-07-07 2022-01-13 ミネベアミツミ株式会社 Planar illumination device
WO2022048713A1 (en) * 2020-09-01 2022-03-10 Continental Automotive Gmbh Illumination unit having a centring device for a light guide

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JP2006013087A (en) * 2004-06-25 2006-01-12 Nichia Chem Ind Ltd Semiconductor light-emitting device
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Publication number Priority date Publication date Assignee Title
JP2013178334A (en) * 2012-02-28 2013-09-09 Sharp Corp Display device and television receiver
US20150212262A1 (en) * 2014-01-29 2015-07-30 Innolux Corporation Backlight module and display comprising the same
US9606290B2 (en) * 2014-01-29 2017-03-28 Innolux Corporation Backlight module and display device comprising the same having engaging convex and concave positioning elements
WO2022009525A1 (en) * 2020-07-07 2022-01-13 ミネベアミツミ株式会社 Planar illumination device
CN111897042A (en) * 2020-07-23 2020-11-06 苏州伊尔顿光电科技有限公司 Novel light guide plate
CN111897042B (en) * 2020-07-23 2022-11-04 苏州伊尔顿光电科技有限公司 Novel light guide plate
WO2022048713A1 (en) * 2020-09-01 2022-03-10 Continental Automotive Gmbh Illumination unit having a centring device for a light guide

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