WO2016167207A1 - Display device - Google Patents

Display device Download PDF

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Publication number
WO2016167207A1
WO2016167207A1 PCT/JP2016/061654 JP2016061654W WO2016167207A1 WO 2016167207 A1 WO2016167207 A1 WO 2016167207A1 JP 2016061654 W JP2016061654 W JP 2016061654W WO 2016167207 A1 WO2016167207 A1 WO 2016167207A1
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WO
WIPO (PCT)
Prior art keywords
sheet
optical
protrusion
pressing surface
sheet pressing
Prior art date
Application number
PCT/JP2016/061654
Other languages
French (fr)
Japanese (ja)
Inventor
桂一 宮川
Original Assignee
シャープ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2016167207A1 publication Critical patent/WO2016167207A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements

Definitions

  • the present invention relates to a display device.
  • Patent Document 1 in a configuration in which a plurality of optical sheets are held so as to be sandwiched between a first frame and a second frame, the first frame has a plurality of grooves arranged on a surface for holding the optical sheet. A configuration is described in which the projections provided on each of the plurality of optical sheets are respectively fitted in the plurality of grooves.
  • the optical performance such as luminance required for the display device varies depending on the purpose of use.
  • each display device is configured using common parts, and the desired optical performance is achieved by appropriately changing the number of optical members (optical sheets). It is possible to design it so that it can be demonstrated.
  • the frame (second number) is matched to the thickness dimension when the largest number (hereinafter referred to as the maximum number) of optical members is used. It is necessary to secure a space for accommodating the optical member in the first frame and the second frame.
  • the optical member of less than the maximum number is accommodated in such a frame, a gap is generated in the space for accommodating the optical member in the thickness direction of the optical member, and the optical member flutters due to vibration or the like. There is a fear. If the optical member flutters, the optical member and a member adjacent to the optical member (for example, a display panel) interfere with each other, and the adjacent member or the optical member itself may be damaged to deteriorate the display quality. is there.
  • the present invention has been completed based on the above circumstances, and an object thereof is to suppress the occurrence of a situation in which the display quality is impaired by suppressing the fluttering of the optical member.
  • the display device of the present invention includes a light source and a plurality of sheet-shaped optical members for transmitting light from the light source and imparting an optical action to the transmitted light, the first optical member and A plurality of optical members configured to be stacked on the first optical member, and the second optical member with respect to the plurality of optical members.
  • a display panel that is arranged on the side and that performs display using light transmitted through the plurality of optical members, and a frame that extends along an outer peripheral portion of the plurality of optical members and an outer peripheral portion of the display panel.
  • the plurality of optical members in a form having a panel support portion for supporting the display panel from the side of the plurality of optical members, and an optical member accommodating space in which at least the plurality of optical members can be disposed between the panel support portions.
  • the optical member of the display A sheet support surface that is supported from the side opposite to the flannel side and a surface of the first optical member facing the display panel side, and a first sheet pressing member that presses the first optical member from the display panel side And the distance from the sheet support surface is larger than the first sheet pressing surface, and is opposed to the surface of the second optical member on the display panel side, and the second optical member A frame having a second sheet pressing surface for pressing from the display panel side.
  • the first optical member and the second optical member are provided in the configuration in which the frame has an optical member housing space in which a plurality of optical members can be disposed between the panel support portion and the sheet support surface. Since the first sheet pressing surface and the second sheet pressing surface are respectively pressed, it is possible to regulate the movement of the first optical member and the second optical member between the panel support portion and the sheet support surface. it can.
  • the first optical member is formed with a first protruding portion that is pressed against the first sheet pressing surface so as to protrude outward from the outer peripheral portion
  • the second optical member includes A second protruding portion that is pressed against the second sheet pressing surface is formed so as to protrude outward from the outer peripheral portion.
  • the portions of the first optical member and the second optical member that are respectively pressed by the first sheet pressing surface and the second sheet pressing surface completely exclude the outer peripheral portion of the optical member.
  • the first optical member and the second optical member can be downsized as compared with the case where the first optical member and the second optical member are formed so as to expand toward the direction.
  • the frame further includes a side wall portion that surrounds the plurality of optical members, and the side wall portion includes a groove portion that accommodates the first protrusion portion and the second protrusion portion.
  • the first sheet pressing surface and the second sheet pressing surface are surfaces positioned on the panel support portion side of the inner surface of the groove portion. According to such a configuration, as the first optical member and the second optical member are accommodated between the panel support portion and the sheet support surface, the first protrusion portion and the second protrusion portion are formed into the groove portions.
  • the first sheet pressing surface and the second sheet pressing surface, the first optical member, and the second optical member can be easily arranged to face each other, which is preferable.
  • the plurality of optical members include a first step surface configured at least by the first protrusion, and a second step surface configured at least by overlapping the second protrusion on the first step surface.
  • the inner surface of the groove portion is configured so that the first sheet pressing surface and the second sheet pressing surface follow the first step surface and the second step surface, respectively. It is formed in a stepped shape. According to such a configuration, the second sheet pressing surface can press the first protruding portion together with the second protruding portion, and it is more preferable to restrict the movement of the first optical member. Can do.
  • the plurality of optical members are stepped in that the dimension in the direction orthogonal to the protruding direction of the first protruding part is larger than the dimension in the direction orthogonal to the protruding direction of the second protruding part. It is set as the structure which makes. According to such a configuration, by increasing the dimension in the direction orthogonal to the protruding direction of the first protruding portion, it is possible to sufficiently ensure the area pressed by the first sheet pressing surface in the first protruding portion. For this reason, for example, it is not necessary to increase the protruding dimension of the first protruding portion to increase the width dimension of the non-display area in the display device, which can contribute to narrowing the frame of the display device.
  • the plurality of optical members are configured to have a step shape by making the dimension in the projecting direction of the first projecting part larger than the dimension in the projecting direction of the second projecting part. According to such a configuration, if the second optical member is disposed at a position where the first optical member is to be disposed, the second projecting portion reaches the position facing the first sheet pressing surface. It is possible to realize an assembly configuration in which the position of the end portion of the second optical member opposite to the second projecting portion side is shifted from the predetermined position in the projecting direction by being inserted. For this reason, when arrange
  • the plurality of optical members are disposed at a position where the second protrusion is displaced along the outer peripheral portion with respect to the first protrusion, so that the first protrusion and the second protrusion are disposed.
  • the groove portions are stacked so as not to overlap each other, and the groove portion accommodates the first protrusion portion and the first groove portion having the first sheet pressing surface, and the second protrusion portion and the second protrusion portion.
  • the second groove portion having the sheet pressing surface forms an internal space independent from each other. According to such a configuration, if the second optical member is to be disposed at a position where the first optical member is to be disposed, or the first optical member is disposed at a position where the second optical member is to be disposed.
  • a plurality of the first sheet pressing surfaces and the second sheet pressing surfaces are respectively formed. According to such a configuration, the first optical member and the second optical member can be pressed at a plurality of locations, and preferably the first optical member and the second optical member are restricted from moving. Can do.
  • the plurality of optical members have a rectangular shape, and the plurality of first sheet pressing surfaces and the second sheet pressing surfaces are respectively arranged on a plurality of sides of the plurality of optical members. According to such a configuration, a plurality of sides of the first optical member and the second optical member can be pressed, respectively, and preferably the movement of the first optical member and the second optical member is restricted. be able to.
  • the plurality of optical members have a rectangular shape, and the plurality of first sheet pressing surfaces and the second sheet pressing surfaces are arranged side by side along one side of the plurality of optical members. Yes. According to such a configuration, one side of the first optical member and the second optical member can be pressed at a plurality of locations, and preferably the first optical member and the second optical member move. Can be regulated.
  • the display panel is a liquid crystal panel in which liquid crystal is sealed between a pair of substrates.
  • a display device can be suitably applied as a liquid crystal display device to various uses such as a display of a tablet personal computer or a portable information terminal.
  • FIG. 1 is an exploded perspective view showing a schematic configuration of a liquid crystal display device according to Embodiment 1 of the present invention.
  • Sectional drawing which shows the cross-sectional structure along the long side direction (X-axis direction) in a liquid crystal display device
  • frame, and the protrusion part of an optical sheet 4 is a longitudinal sectional view (corresponding to a view cut along line VV).
  • 4 is a longitudinal sectional view (corresponding to a view cut along line VI-VI).
  • 4 is a longitudinal sectional view (corresponding to a view cut along line VII-VII).
  • frame which concerns on the modification 1 of Embodiment 1, and the protrusion part of an optical sheet 9 is a cross-sectional view of FIG. 9 (corresponding to a view cut along line XX).
  • frame which concerns on the modification 2 of Embodiment 1, and the protrusion part of an optical sheet The perspective view which shows the sheet
  • FIG. 12 (corresponding to a view cut along line XIII-XIII) The perspective view which shows the sheet
  • 14 (corresponding to a view cut along line XV-XV)
  • Cross-sectional view of FIG. 15 (corresponding to a view cut along line XVI-XVI) The cross-sectional view which shows the sheet
  • FIG. 6 is an exploded perspective view showing a schematic configuration of a liquid crystal display unit constituting a liquid crystal display device according to Embodiment 4 of the present invention.
  • FIG. 7 is an exploded perspective view showing a schematic configuration of a liquid crystal display unit that constitutes a liquid crystal display device according to a first modification of the fourth embodiment.
  • FIGS. 1 A first embodiment of the present invention will be described with reference to FIGS.
  • the liquid crystal display device 10 is illustrated as a display device.
  • a part of each drawing shows an X axis, a Y axis, and a Z axis, and each axis direction is drawn to be a direction shown in each drawing.
  • FIG. 3 is used as a reference, and the upper side of the figure is the front side and the lower side of the figure is the back side.
  • the liquid crystal display device 10 has a horizontally long rectangular shape as a whole, and is formed by assembling components such as a touch panel 14, a cover panel 15, and a casing 16 to a liquid crystal display unit 20 that is a basic component. It is said.
  • the liquid crystal display unit 20 includes a liquid crystal panel (display panel) 11 having a display surface 11c that displays an image on the front side, and a backlight device (illumination) that is disposed on the back side of the liquid crystal panel 11 and emits light toward the liquid crystal panel 11.
  • Device 12 and a housing frame (housing member) 13 that holds the liquid crystal panel 11 from the front side, that is, the side opposite to the backlight device 12 side (display surface 11c side).
  • Both the touch panel 14 and the cover panel 15 are accommodated from the front side in a housing frame 13 constituting the liquid crystal display unit 20, and an outer peripheral portion (including an outer peripheral end) is supported from the back side by the housing frame 13. .
  • the casing 16 is assembled to the housing frame 13 so as to cover the liquid crystal display unit 20 from the back side.
  • the housing frame 13, the cover panel 15, and the casing 16 constitute the appearance of the liquid crystal display device 10.
  • the liquid crystal display device 10 according to the present embodiment is mainly used for electronic devices such as tablet-type notebook personal computers and smartphones, and has a screen size of about several inches to 20 inches. The size is classified as small and medium.
  • the liquid crystal panel 11 constituting the liquid crystal display unit 20 will be described in detail.
  • the liquid crystal panel 11 has a horizontally long rectangular shape and is substantially transparent and has a pair of glass substrates 11a and 11b having excellent translucency, and between the substrates 11a and 11b.
  • a liquid crystal layer (not shown) containing liquid crystal molecules, which are substances whose optical characteristics change with application of an electric field, with both substrates 11a and 11b maintaining a gap corresponding to the thickness of the liquid crystal layer. It is bonded together with a sealing agent (not shown).
  • the liquid crystal panel 11 has a display area in which an image is displayed, and a non-display area that has a frame shape surrounding the display area and in which no image is displayed.
  • a part of the non-display area is an outer peripheral portion 11d held by a frame 40 described later.
  • the long side direction in the liquid crystal panel 11 coincides with the X-axis direction
  • the short side direction coincides with the Y-axis direction
  • the thickness direction coincides with the Z-axis direction.
  • the front side is the CF substrate 11a
  • the back side is the array substrate 11b
  • a number of TFTs Thin Film Transistors
  • pixel electrodes which are switching elements, are provided side by side.
  • a gate wiring and a source wiring having a lattice shape are disposed around the gate.
  • a predetermined image signal is supplied to each wiring from a control circuit (not shown).
  • the pixel electrode is made of a transparent electrode such as ITO (Indium Tin Oxide) or ZnO (Zinc Oxide).
  • the CF substrate 11a On the other hand, on the CF substrate 11a, a large number of color filters are arranged side by side at positions corresponding to the respective pixels.
  • the color filter is arranged so that three colors of R, G, and B are alternately arranged.
  • a light shielding layer (black matrix) for preventing color mixture is formed between the color filters.
  • a counter electrode facing the pixel electrode on the array substrate 11b side is provided on the surface of the color filter and the light shielding layer.
  • the CF substrate 11a is slightly smaller than the array substrate 11b.
  • An alignment film for aligning liquid crystal molecules contained in the liquid crystal layer is formed on the inner surfaces of both the substrates 11a and 11b. Note that polarizing plates 11c and 11d are attached to the outer surface sides of both the substrates 11a and 11b, respectively (see FIG. 3).
  • the backlight device 12 constituting the liquid crystal display unit 20 will be described in detail.
  • the backlight device 12 has a horizontally long and substantially block shape as in the liquid crystal panel 11 as a whole.
  • the backlight device 12 includes an LED (Light Emitting Diode) 21 that is a light source, an LED substrate (light source substrate) 22 on which the LED 21 is mounted, and light from the LED 21.
  • a light guide plate 23 that guides light, a plurality of optical sheets (optical members) 30 that are stacked on the light guide plate 23, a frame 40 that holds the light guide plate 23, the optical sheet 30, and the liquid crystal panel 11;
  • a chassis 25 for accommodating the LED substrate 22 and the light guide plate 23 therebetween.
  • the backlight device 12 is a so-called edge light type (side light type) in which LEDs 21 (LED substrates 22) are unevenly distributed at one end on the long side of the outer peripheral portion.
  • the LED 21 has a configuration in which an LED chip is sealed with a resin material on a substrate portion fixed to the LED substrate 22.
  • the LED chip mounted on the substrate unit has one main emission wavelength, and specifically, one that emits blue light in a single color is used.
  • the resin material that seals the LED chip is dispersed and blended with a phosphor that emits a predetermined color when excited by the blue light emitted from the LED chip, and generally emits white light as a whole. It is said.
  • the phosphor for example, a yellow phosphor that emits yellow light, a green phosphor that emits green light, and a red phosphor that emits red light are used in appropriate combination, or any one of them is used. It can be used alone.
  • the LED 21 is a so-called top surface light emitting type in which a surface opposite to the mounting surface with respect to the LED substrate 22 is a light emitting surface 21a.
  • the LED substrate 22 has a long plate shape extending along the X-axis direction (the long side direction of the light guide plate 23 and the chassis 25). It is accommodated between the frame 40 (sheet support part 42) and the chassis 25 in a posture parallel to the X-axis direction and the Z-axis direction, that is, a posture orthogonal to the plate surfaces of the liquid crystal panel 11 and the light guide plate 23. That is, the LED substrate 22 has a posture in which the long side direction on the plate surface coincides with the X-axis direction, the short side direction coincides with the Z-axis direction, and the plate thickness direction orthogonal to the plate surface coincides with the Y-axis direction. It is said.
  • the LED substrate 22 is opposed to the inner surface of the light guide plate 23 (mounting surface 22a) with a predetermined interval in the Y-axis direction with respect to the end surface on one long side (light incident surface 23b) of the light guide plate 23. It is arranged in. Therefore, the alignment direction of the LED 21 and the LED substrate 22 and the light guide plate 23 substantially coincides with the Y-axis direction.
  • the LED substrate 22 has a length dimension that is substantially the same as the long side dimension of the light guide plate 23 and is attached to one end portion of the long side of the chassis 25 described later.
  • the mounting surface 22a is used on the inner side of the LED substrate 22, that is, on the plate surface facing the light guide plate 23 side (the surface facing the light guide plate 23), as shown in FIG.
  • the mounting surface 22a is used.
  • a plurality of the LEDs 21 are arranged in a line (linearly) in parallel on the mounting surface 22a of the LED substrate 22 along the length direction (X-axis direction) with a predetermined interval. That is, it can be said that the LEDs 21 are intermittently arranged in parallel along the long side direction at one end on the long side of the backlight device 12.
  • a wiring pattern (not shown) made of a metal film (such as copper foil) is provided on the mounting surface 22a of the LED substrate 22 and extends in the X-axis direction and connects adjacent LEDs 21 in series across the LED 21 group. And the terminal portions formed at both ends of the wiring pattern are connected to an external LED driving circuit, so that driving power can be supplied to each LED 21.
  • the base material of the LED substrate 22 is made of metal like the chassis 25, and the wiring pattern (not shown) described above is formed on the surface thereof via an insulating layer.
  • insulating materials such as a ceramic, can also be used as a material used for the base material of LED board 22.
  • the light guide plate 23 is made of a synthetic resin material (for example, acrylic) having a refractive index sufficiently higher than that of air and substantially transparent (excellent translucency).
  • the light guide plate 23 is formed in a flat plate shape that is horizontally long when viewed in a plane, like the liquid crystal panel 11, and the plate surface thereof is parallel to the plate surface (display surface 11 c) of the liquid crystal panel 11.
  • the long side direction on the plate surface coincides with the X-axis direction
  • the short side direction coincides with the Y-axis direction
  • the plate thickness direction orthogonal to the plate surface coincides with the Z-axis direction.
  • the light guide plate 23 is disposed in the chassis 25 at a position directly below the liquid crystal panel 11 and the optical sheet 30, and one of the outer peripheral end surfaces of the light guide plate 23 is disposed at one end of the chassis 25 on the long side.
  • Each LED 21 on the LED board 22 is opposed to each other. Therefore, the alignment direction of the LED 21 (LED substrate 22) and the light guide plate 23 coincides with the Y-axis direction, whereas the alignment direction (overlapping direction) of the optical sheet 30 (liquid crystal panel 11) and the light guide plate 23 is Z. It is coincident with the axial direction, and both alignment directions are orthogonal to each other.
  • the light guide plate 23 introduces light emitted from the LED 21 along the Y-axis direction from the end surface on the long side, and propagates the light to the optical sheet 30 side (front side, light emission side). It has the function of rising up and emitting from the plate surface.
  • the surface facing the front side transmits the internal light to the optical sheet 30 as shown in FIGS.
  • a light emitting surface 23a is formed to emit light toward the liquid crystal panel 11 side.
  • the pair of long side end surfaces having a longitudinal shape along the X-axis direction LED 21 alignment direction, LED substrate 22 long side direction
  • One end surface is opposed to the LED 21 (LED substrate 22) with a predetermined space therebetween, and this is a light incident surface 23b on which light emitted from the LED 21 is incident. Yes.
  • the light incident surface 23b is a surface that is parallel to the X-axis direction and the Z-axis direction, and is a surface that is substantially orthogonal to the light emitting surface 23a. Further, the alignment direction of the LED 21 and the light incident surface 23b (light guide plate 23) coincides with the Y-axis direction and is parallel to the light emitting surface 23a. Of the outer peripheral end face of the light guide plate 23, the end face on the long side opposite to the light incident face 23b and the pair of end faces on the short side are respectively LED non-facing end faces that do not face the LED 21.
  • the plate surface 23c opposite to the light emitting surface 23a is a reflection capable of reflecting the light in the light guide plate 23 and rising to the front side as shown in FIG.
  • a sheet 24 is provided so as to cover the entire area.
  • the reflection sheet 24 is disposed between the chassis 25 and the light guide plate 23.
  • a scattering portion (not shown) that scatters the light in the light guide plate 23 is provided on at least one of the light exit surface 23 a and the opposite plate surface 23 c in the light guide plate 23, or on the surface of the reflection sheet 24. Is patterned so as to have a predetermined in-plane distribution, whereby the light emitted from the light exit surface 23a is controlled to have a uniform distribution in the plane.
  • the optical sheet 30 has a horizontally long rectangular shape when seen in a plane, like the liquid crystal panel 11 and the chassis 25.
  • the optical sheet 30 is disposed between the liquid crystal panel 11 and the light guide plate 23 so as to transmit light emitted from the light guide plate 23 and to give a predetermined optical action to the transmitted light. 11 is emitted.
  • the optical sheet 30 is arranged in a form in which a plurality of sheets (three sheets in the present embodiment) are stacked on each other. In the following description, when a plurality of optical sheets 30 are distinguished from each other, the first optical sheet (first optical member) 30A and the second optical sheet (second optical member) are respectively viewed from the light guide plate 23 side. 30B and the third optical sheet 30C.
  • the optical sheet 30 include, for example, a diffusion sheet, a lens sheet, a reflective polarizing sheet, and the like, which can be appropriately selected and used.
  • the optical sheet 30 can be used by appropriately changing the number of sheets according to the optical performance required for the liquid crystal display device 10 (in this embodiment, the number can be changed from one to four).
  • the luminance of the liquid crystal display device in order to respectively 350cd / m 2, 500cd / m 2, different set values of 700 cd / m 2, the use of optical sheets 30 two respectively three, as four Can do.
  • the configuration of each part of the optical sheet 30 will be described later.
  • the frame 40 is formed in a substantially frame shape extending along the outer peripheral portion 30 d of the plurality of optical sheets 30 and the outer peripheral portion 11 d of the liquid crystal panel 11.
  • the frame 40 is made of synthetic resin, and at least a panel support part 41 and a sheet support part 42, which will be described later, are integrally formed, and the number of parts is reduced compared to a configuration in which these are provided as separate members. It is possible to reduce the man-hours for assembling them together and the assembling error associated with the assembling.
  • the frame 40 is assembled to the chassis 25 and serves as a structural member that gives the liquid crystal display unit 20 rigidity together with the chassis 25.
  • the frame 40 is arranged in such a manner that the sheet support portion 42 is interposed between the outer peripheral portion of the light guide plate 23 and the LED 21 and the outer peripheral portions 11 d and 30 d of the liquid crystal panel 11 and the optical sheet 30. These are partitioned so as to be optically independent. Thereby, the light emitted from the LED 21 and not entering the light incident surface 23b and the light leaking from the end surface of the light guide plate 23 (the light incident surface 23b and the three LED non-opposing end surfaces not facing the LED 21) are blocked. Further, it is possible to suppress direct light incident on each of the outer peripheral portions 11 d and 30 d (particularly the end surfaces) of the liquid crystal panel 11 and the optical sheet 30. The configuration of each part of the frame 40 will be described later.
  • the chassis 25 is made of a metal plate having excellent thermal conductivity, such as an aluminum plate or an electrogalvanized steel plate (SEC), and has a horizontally long rectangular shape as in the liquid crystal panel 11 as shown in FIGS. Eggplant.
  • the chassis 25 is formed with a claw portion (not shown), and the chassis 25 is assembled with the frame 40 by fitting the claw portion to a fitting portion (not shown) formed on the frame.
  • the assembly configuration of the chassis 25 and the frame 40 is not limited to the claw fitting, and can be designed as appropriate.
  • the chassis 25 supports the light guide plate 23 from the back side (the side opposite to the light emitting surface 23a side), and holds (holds) the light guide plate 23 between the frame 40 (sheet support portion 42). Has been.
  • the chassis 25 is assembled with the housing frame 13 so as to hold (clamp) each part of the liquid crystal display unit 20 with the housing frame 13.
  • a board such as a control board for controlling the driving of the liquid crystal panel 11, an LED driving board for supplying driving power to the LEDs 21, and a battery (not shown) are accommodated.
  • the chassis 25 has a flat plate shape is illustrated, but the configuration of the chassis 25 is not limited thereto.
  • the chassis 25 may be formed to include a bottom plate that supports the light guide plate and a side plate that rises from at least one end of the bottom plate. In such a configuration, the LED substrate 22 may be attached to the inner surface of the side plate.
  • each of the plurality of optical sheets 30 is provided with a protruding portion 32 that protrudes outward from the outer peripheral portion 30d.
  • each of the plurality of optical sheets 30 includes a main body 31 that has a rectangular shape, and a protrusion 32 that protrudes in an ear shape from one side 31 a of the main body 31.
  • the protruding portion 32 is disposed near the central portion on one side 31a of the main body portion 31 (see FIG. 2).
  • the protrusion part 32 is distribute
  • a protruding portion 32 is a portion held by the frame 40 in a manner described later.
  • the protrusion 32 provided on the first optical sheet 30A is referred to as a first protrusion 32A
  • the protrusion 32 provided on the second optical sheet 30B is referred to as a second protrusion 32B.
  • the protrusion 32 provided on the third optical sheet 30C is referred to as a third protrusion 32C.
  • the plurality of optical sheets 30 includes a first step surface 33 ⁇ / b> A configured at least by the first protrusion 32 ⁇ / b> A and a second protrusion 32 ⁇ / b> B overlapping the first step surface 33 ⁇ / b> A.
  • the second step surface 33B and the third step surface 33C configured by the third protrusion portion 32C overlapping the second step surface 33B are stacked on each other so as to form a step.
  • the first protrusion 32A, the second protrusion 32B, and the third protrusion 32C have the largest dimension in the direction (Y-axis direction) orthogonal to the protrusion direction of the first protrusion 32A, and the third protrusion 32C By making the dimension the smallest, it forms a step.
  • the optical sheet 30A forming the first step surface 33A is a single portion, and the optical sheets 30A and 30B forming the second step surface 33B overlap each other,
  • the portions where the three optical sheets 30A, 30B, 30C forming the third step surface 33C overlap are arranged in this order to form a step portion 33 having a step corresponding to each thickness dimension of the optical sheets 30A, 30B, 30C.
  • the step portion 33 is configured to have a step on one end side (left side in FIG. 8) in the Y-axis direction, and the end surfaces of the optical sheets 30A, 30B, and 30C are on the other end side (right side in FIG. 8). It is set as the structure which continues in a plane.
  • the frame 40 includes a panel support portion 41 that supports the liquid crystal panel 11 from the back side (a plurality of optical sheets 30 side), and a plurality of optical sheets 30 that are opposite to the back side (the liquid crystal panel 11 side). And a side wall portion 44 that surrounds the plurality of optical sheets 30.
  • the panel support portion 41 and the sheet support portion 42 having the sheet support surface 42 a are formed so as to protrude inward from the inner surface 44 a of the side wall portion 44. That is, the frame 40 is configured such that the panel support portion 41, the side wall portion 44, and the sheet support portion 42 are continuous in a U shape in a sectional view.
  • the panel support portion 41 is formed in a frame shape along the outer peripheral portion 11d of the liquid crystal panel 11, and can support the outer peripheral portion 11d of the liquid crystal panel 11 from the back side over almost the entire periphery. It is possible.
  • the panel support portion 41 is configured to have a step shape with the surface of the side wall portion 44 opposite to the chassis 25 side, and the liquid crystal panel 11 is fitted to the step. And the panel support part 41 is set as the structure which hold
  • the panel support part 41 is on the opposite side (right side in FIG. 3) to the side on which the sheet pressing surface 46 is arranged, compared to the side (left side in FIG. 3) on which the sheet pressing surface 46 described later is arranged.
  • the projecting dimension from the side wall 44 is short, and the panel support 41 and the optical sheet 30 are unlikely to interfere with each other when the optical sheet 30 is disposed on the sheet support surface 42a from the panel support 41 side. ing.
  • the sheet support portion 42 is formed in a frame shape along the outer peripheral portion 30d of the plurality of optical sheets 30, and supports the outer peripheral portion 30d of the optical sheet 30 from the back side over almost the entire periphery. It is possible. Of the surfaces rising from the inner surface 44a of the side wall portion 44, the sheet support portion 42 has a surface positioned on the panel support portion 41 side as a sheet support surface 42a. Moreover, the sheet
  • the sheet support portion 42 is configured to hold (clamp) the light guide plate 23 and the reflection sheet 24 between the light guide plate 23 and the chassis 25 disposed on the back side of the reflection sheet 24.
  • the sheet support portion 42 is provided in a form having a sheet storage space 43 in which at least a plurality of optical sheets 30 can be disposed between the sheet support portion 42 and the panel support portion 41.
  • the sheet storage space 43 is a gap between the panel support portion 41 and the sheet support portion 42 provided in parallel with each other, as shown in FIG.
  • the sheet accommodating space 43 extends in a shape surrounding the plurality of optical sheets 30 and has a groove shape that opens toward the inside (on the optical sheet 30 side).
  • seat accommodation space 43 is set as the structure which can hold
  • the sheet storage space 43 has an inner diameter (a width dimension between the panel support portion 41 and the sheet support portion 42) of the maximum number of optical sheets 30 that can be used in the liquid crystal display device 10 (four in the present embodiment).
  • the thickness dimension is equivalent to the thickness dimension, and is configured to be able to accommodate the maximum number of optical sheets 30 with a slight clearance.
  • the back surface of the panel support portion 41 is opposed to the surface on the liquid crystal panel 11 side of the fourth optical sheet (not shown) further laminated on the third optical sheet 30C, and It can be said that the fourth optical sheet functions as a fourth sheet pressing surface for pressing from the liquid crystal panel 11 side.
  • the side wall 44 has a short rectangular tube shape that collectively surrounds a part of the liquid crystal panel 11, the plurality of optical sheets 30, and the outer peripheral end surfaces of the light guide plate 23.
  • the side wall portion 44 includes a pair of short side portions extending along the Z-axis direction and the Y-axis direction, and a pair of long side portions extending along the Z-axis direction and the X-axis direction, Are connected to each other to form a square shape.
  • a portion of the inner surface 44 a of the side wall portion 44 that faces the sheet storage space 43 and forms the back surface 43 a of the sheet storage space 43 is opposed to the outer peripheral end surface of the optical sheet 30.
  • channel part 45 which accommodates the 1st protrusion part 32A, the 2nd protrusion part 32B, and the 3rd protrusion part 32C of several optical sheet 30A, 30B, 30C is formed in the back surface 43a.
  • the groove 45 is recessed in the inner surface 44a so as to follow the outer shape of the first protrusion 32A, the second protrusion 32B, and the third protrusion 32C.
  • the groove 45 has a slit shape that opens in the inner surface 44 a of the side wall 44.
  • the groove 45 has a slight clearance in the thickness direction of each optical sheet 30 and is configured to be able to accommodate the first protrusion 32A, the second protrusion 32B, and the third protrusion 32C in a lump. ing.
  • the frame 40 has a first sheet pressing surface 46A that presses the first optical sheet 30A from the liquid crystal panel 11 side and a distance from the sheet support surface 42a that is larger than the first sheet pressing surface 46A. And the distance from the second sheet pressing surface 46B for pressing the second optical sheet 30B from the liquid crystal panel 11 side and the sheet support surface 42a is larger than the second sheet pressing surface 46B.
  • the first sheet pressing surface 46A, the second sheet pressing surface 46B, and the third sheet pressing surface 46C may be collectively referred to as the sheet pressing surface 46.
  • the first sheet pressing surface 46 ⁇ / b> A, the second sheet pressing surface 46 ⁇ / b> B, and the third sheet pressing surface 46 ⁇ / b> C are in a state where a plurality of optical sheets 30 are stored in the sheet storage space 43.
  • 30e, 30e, and 30e are opposed.
  • the first sheet pressing surface 46A, the second sheet pressing surface 46B, and the third sheet pressing surface 46C are surfaces extending along the extending direction (X-axis direction and Y-axis direction) of the sheet support surface 42a, respectively. ing.
  • the separation distance L1 between the first sheet pressing surface 46A and the sheet support surface 42a is equal to the thickness dimension of the first optical sheet 30A, and the separation distance between the second sheet pressing surface 46B and the sheet support surface 42a.
  • L2 is equivalent to the sum of the thickness dimensions of the first optical sheet 30A and the second optical sheet 30B, and the separation distance L3 between the third sheet pressing surface 46CA and the sheet support surface 42a is equal to the first optical sheet 30A and the second optical sheet 30B.
  • each sheet pressing surface 46 is provided at a position corresponding to the position of the surface 30 e on the liquid crystal panel 11 side of each optical sheet 30 in the frame 40.
  • the first sheet pressing surface 46A, the second sheet pressing surface 46B, and the third sheet pressing surface 46C are spaced apart from the sheet support surface 42a in this order, and follow the step portions 33 of the plurality of optical sheets 30. It has a stepped shape.
  • the sheet pressing surface 46 (the first sheet pressing surface 46A, the second sheet pressing surface 46B, and the third sheet pressing surface 46C) is located on the panel support portion 41 side of the inner surface of the groove 45 as shown in FIG. It is considered as a surface.
  • the inner surface of the groove 45 includes the first sheet pressing surface 46A, the second sheet pressing surface 46B, and the third sheet pressing surface 46C, which are the first step surface 33A and the second step surface of the plurality of optical sheets 30.
  • 33B and the third step surface 33C are formed in steps so as to follow each other. That is, the groove 45 is formed such that the inner diameter in the direction in which the sheet support surface 42a and the panel support 41 are aligned (Z-axis direction) increases stepwise.
  • the surface of the groove 45 that faces the sheet pressing surface 46 is a sheet support surface 42a on which the main body 31 of the optical sheet 30 is placed in the sheet support portion 42 (the position is indicated by a one-dot broken line in FIG. 8). And is in the same plane.
  • the mode of the groove 45 is not limited to this, and the groove 45 may be formed such that a portion on the sheet support 42 side penetrates the sheet support 42.
  • FIG. 4 in order to make the configuration of the groove portion 45 easier to see, a portion of the panel support portion 41 located above the groove portion 45 is cut out. In FIG. 4, the light guide plate 23 is omitted.
  • the frame 40 is placed on the work table with the seat support surface 42a facing upward. Then, the operator accommodates the outer peripheral portion 30 d of the first optical sheet 30 ⁇ / b> A in the sheet accommodation space 43 of the frame 40. Specifically, first, the side 31a side of the first optical sheet 30A is inserted into the side of the sheet storage space 43 where the sheet pressing surface 46 is provided. Then, the groove 45 opens at a position corresponding to the first projecting portion 32 ⁇ / b> A of the first optical sheet 30 ⁇ / b> A in the sheet accommodation space 43, and as the first optical sheet 30 ⁇ / b> A is inserted into the sheet accommodation space 43. Thus, the first protrusion 32 ⁇ / b> A is inserted into the groove 45.
  • the outer peripheral portion 30d on the opposite side 31b side of the first optical sheet 30A is accommodated in the sheet accommodating space 43, and the first optical sheet 30A is placed on the sheet support surface 42a.
  • a part of the first protrusion 32A (the left third part shown in FIG. 8) is arranged to face the first sheet pressing surface 46A with almost no gap, and the other part (FIG. 8).
  • 2/3 is disposed so as to partially fill the space on the sheet support surface 42a side between the second sheet pressing surface 46B (third sheet pressing surface 46C) and the sheet supporting surface 42a.
  • the operator accommodates the outer peripheral portion 30d of the second optical sheet 30B in the sheet accommodation space 43 of the frame 40 in a form of being laminated on the first optical sheet 30A.
  • a specific aspect is the same as the aspect in which the first optical sheet 30A is accommodated in the sheet accommodating space 43, and the description thereof is omitted.
  • the second projecting portion 32B is raised by the first projecting portion 32A, and a part of the second projecting portion 32B (the left half portion shown in FIG. 8) is in the second state with almost no gap.
  • the other part While being disposed opposite to the sheet pressing surface 46B, the other part (the right half portion shown in FIG. 8) is a space on the sheet supporting surface 42a side between the third sheet pressing surface 46C and the sheet supporting surface 42a.
  • the first protrusion 32A and the first protrusion 32A are partly filled.
  • the operator accommodates the outer peripheral portion 30d of the third optical sheet 30C in the sheet accommodation space 43 of the frame 40 in a form of being laminated on the second optical sheet 30B.
  • a specific aspect is the same as the aspect in which the first optical sheet 30A is accommodated in the sheet accommodating space 43, and the description thereof is omitted.
  • the third protrusion 32C is raised by the first protrusion 32A and the second protrusion 32B, and the third protrusion 32C is disposed to face the third sheet pressing surface 46C with almost no gap. .
  • the assembly of the plurality of optical sheets 30 to the frame 40 is completed.
  • the fourth optical sheet is accommodated in the sheet accommodating space 43 of the frame 40 so as to be stacked on the third optical sheet 30C.
  • the outer peripheral portion of the optical sheet 4 may be arranged to face the back surface of the panel support portion 41 with almost no gap.
  • the liquid crystal display unit 20 does not include the third optical sheet 30C, that is, includes only the first optical sheet 30A and the second optical sheet 30B, the third sheet pressing surface 46C and the second optical sheet 30C are provided. It does not matter as a shape having a gap between the protrusion 32B.
  • the mode in which the optical sheets 30A, 30B, and 30C are sequentially assembled to the frame 40 has been described. However, the optical sheets 30A, 30B, and 30C are laminated in advance, and the frame is collectively collected. It is good also as an aspect assembled to 40.
  • the liquid crystal display device 10 includes an LED 21 and a plurality of optical sheets 30 for transmitting light from the LED 21 and imparting an optical action to the transmitted light, the first optical sheet 30A, A plurality of optical sheets 30 configured to include a second optical sheet 30 ⁇ / b> B arranged in a stacked manner on the first optical sheet 30 ⁇ / b> A, and a second optical sheet relative to the plurality of optical sheets 30
  • the liquid crystal panel 11 is arranged on the 30B side and performs display using light transmitted through the plurality of optical sheets 30, and the outer peripheral portion 30d of the plurality of optical sheets 30 and the outer peripheral portion 30d of the liquid crystal panel 11 are extended.
  • a frame support 40 that supports the liquid crystal panel 11 from the plurality of optical sheets 30 side, and at least the plurality of optical sheets 3 between the panel support 41. And a sheet support surface 42a for supporting the plurality of optical sheets 30 from the side opposite to the liquid crystal panel 11 side, and a surface 30e on the liquid crystal panel 11 side of the first optical sheet 30A. And a first sheet pressing surface 46A that presses the first optical sheet 30A from the liquid crystal panel 11 side, and a distance from the sheet support surface 42a that is larger than the first sheet pressing surface 46A (L2> L1). And a frame 40 having a second sheet pressing surface 46B that is opposed to the surface 30e of the second optical sheet 30B on the liquid crystal panel 11 side and presses the second optical sheet 30B from the liquid crystal panel 11 side. It is equipped with.
  • the first optical sheet 30A and the first optical sheet 30A Since the first sheet pressing surface 46A and the second sheet pressing surface 46B that respectively hold the second optical sheet 30B are provided, the first optical sheet 30A and the second optical sheet 30B are interposed between the panel support portion 41 and the sheet support surface 42a.
  • the movement of the optical sheet 30B can be restricted.
  • the number of optical sheets 30 disposed between the panel support portion 41 and the sheet support portion 42 is the maximum number that can be disposed between the panel support portion 41 and the sheet support surface 42a (4 in the present embodiment).
  • the other member (the liquid crystal panel 11, the light guide plate 23, etc.) interferes with the other member. Further, it is possible to suppress the occurrence of a situation where the interfered optical sheet 30 itself is damaged.
  • the holding mode of the optical sheet 30 as described above acts individually for each of the optical sheets 30A, 30B, and 30C. That is, since each sheet pressing surface 46A, 46B, 46C individually presses the protrusions 32A, 32B, 32C, for example, the liquid crystal display device does not include the third optical sheet 30C, that is, the first optical sheet. Even in the case where only 30A and the second optical sheet 30B are provided, the first sheet pressing surface 46A regulates the movement of the first protruding portion 32A, and the second sheet pressing surface 46B is the second protruding.
  • the mode of restricting the movement of the part 32B can act similarly to the configuration in which the liquid crystal display device 10 includes the third optical sheet 30C.
  • the number of optical sheets 30 can be appropriately changed between 1 and the maximum number, and the liquid crystal display device can be used.
  • the optical performance of 10 can be appropriately set by changing the number of optical sheets 30.
  • the first optical sheet 30A is provided with a first protruding portion 32A that is pressed by the first sheet pressing surface 46A so as to protrude outward from the outer peripheral portion 30d.
  • the optical sheet 30B is formed with a second protruding portion 32B that is pressed by the second sheet pressing surface 46B so as to protrude outward from the outer peripheral portion 30d. For this reason, portions of the first optical sheet 30A and the second optical sheet 30B that are respectively pressed by the first sheet pressing surface 46A and the second sheet pressing surface 46B completely outwardly surround the outer peripheral portion of the optical sheet.
  • the first optical sheet 30A and the second optical sheet 30B can be reduced in size compared to the case where the first optical sheet 30A and the second optical sheet 30B are formed so as to expand toward the front.
  • the frame 40 further includes a side wall portion 44 that surrounds the plurality of optical sheets 30, and the side wall portion 44 has a groove portion that accommodates the first protruding portion 32 ⁇ / b> A and the second protruding portion 32 ⁇ / b> B. 45 is formed, and the first sheet pressing surface 46A and the second sheet pressing surface 46B are surfaces located on the panel support portion 41 side of the inner surface of the groove 45. Therefore, as the first optical sheet 30A and the second optical sheet 30B are accommodated between the panel support portion 41 and the sheet support surface 42a, the first protrusion portion 32A and the second protrusion portion 32B are grooved.
  • the first sheet pressing surface 46A, the second sheet pressing surface 46B, the first optical sheet 30A, and the second optical sheet 30B can be easily arranged to face each other, which is preferable.
  • the plurality of optical sheets 30 are configured at least by the first step surface 33A configured by at least the first projecting portion 32A and the second projecting portion 32B overlapping the first step surface 33A.
  • the second step surface 33B is laminated to form a stepped shape, and the inner surface of the groove 45 includes the first sheet pressing surface 46A and the second sheet pressing surface 46B, and the first step surface 33A and the second step. It is formed in a step shape so as to follow the surface 33B.
  • the second sheet pressing surface 46B can also press the first protruding portion 32A together with the second protruding portion 32B, and more preferably, the movement of the first optical sheet 30A can be regulated. it can.
  • the plurality of optical sheets 30 have a dimension in the direction (Y-axis direction) orthogonal to the protrusion direction of the first protrusion 32A (Y-axis direction) perpendicular to the protrusion direction of the second protrusion 32B. ) To be larger than the dimension in FIG. For this reason, by increasing the dimension in the direction orthogonal to the protruding direction of the first protruding portion 32A, it is possible to sufficiently secure an area pressed by the first sheet pressing surface 46A in the first protruding portion 32A. It is not necessary to increase the projecting dimension of one projecting portion to increase the width dimension of the non-display area in the liquid crystal display device, which can contribute to narrowing the frame of the liquid crystal display device 10.
  • the display panel is a liquid crystal panel 11 in which liquid crystal is sealed between a pair of substrates 11a and 11b.
  • a display device can be suitably applied to the liquid crystal display device 10 for various uses, such as a display of a tablet personal computer or a portable information terminal.
  • Modification 1 of Embodiment 1 of the present invention will be described with reference to FIGS. 9 and 10.
  • a liquid crystal display device 110 in which the aspect of the groove 45 is changed is shown.
  • the groove portion 145 is configured by a rib 145a erected on the inner surface 44a so as to follow the outer shape of the first protrusion 32A, the second protrusion 32B, and the third protrusion 32C.
  • the groove portion 145 has a slit shape that opens between the flange-shaped rib 145a protruding from the inner surface 44a of the side wall portion 44 and the sheet support surface 42a.
  • the groove portion 145 has a slight clearance in the thickness direction of each optical sheet 30 and is configured to be able to collectively accommodate the first protrusion portion 32A, the second protrusion portion 32B, and the third protrusion portion 32C. Yes.
  • the groove portion 245 extends along the surface 30e on the liquid crystal panel 11 side of the first protrusion portion 32A, the second protrusion portion 32B, and the third protrusion portion 32C, and a plurality of ribs 245a, 245a and 245a.
  • the groove portion 245 has a slit shape that opens between the flange-shaped ribs 245a protruding from the inner surface 44a of the side wall portion 44 and the sheet support surface 42a.
  • the groove portion 245 has a slight clearance in the thickness direction of each optical sheet 30 and is configured to be able to collectively accommodate the first protrusion portion 32A, the second protrusion portion 32B, and the third protrusion portion 32C. Yes.
  • the plurality of optical sheets 330 includes a first step surface 33A constituted by at least a first protrusion 332A and a second protrusion 332B overlapping the first step surface 33A.
  • the second step surface 33B and the third step surface 33C configured by the third protrusion portion 332C overlapping the second step surface 33B are stacked on each other so as to form a step.
  • the first protrusion 332A, the second protrusion 332B, and the third protrusion 332C have the largest dimension in the protrusion direction (X-axis direction) of the first protrusion 332A, and the third protrusion 332C has the smallest dimension.
  • the optical sheet 330A forming the first step surface 33A is one part along the X-axis direction, and the optical sheets 330A and 330B forming the second step surface 33B overlap each other.
  • the portions where the three optical sheets 330A, 330B and 330C forming the third step surface 33C overlap are arranged in this order to form a step portion 33 having a step corresponding to each thickness dimension of the optical sheets 330A, 330B and 330C. ing.
  • the sheet pressing surface 346 (the first sheet pressing surface 346A, the second sheet pressing surface 346B, and the third sheet pressing surface 346C) is positioned on the panel support portion 41 side of the inner surface of the groove portion 345. It is considered as a surface.
  • the inner surface of the groove 345 includes the first sheet pressing surface 346A, the second sheet pressing surface 346B, and the third sheet pressing surface 346C, which are the first step surface 33A and the second step surface of the plurality of optical sheets 330.
  • 33B and the third step surface 33C are formed in steps so as to follow each other.
  • the groove part 345 is formed so that the inner diameter in the arrangement direction (Z-axis direction) of the sheet support surface 42a and the panel support part 41 increases stepwise.
  • the surface of the groove 345 that faces the sheet pressing surface 346 is flush with the sheet support surface 42 a on which the main body 31 of the optical sheet 330 is placed in the sheet support 42.
  • the mode of the groove 345 is not limited thereto, and the groove 345 may be formed such that a portion on the sheet support portion 42 side penetrates the sheet support portion 42.
  • the plurality of optical sheets 330 are configured to have a step shape by making the dimension in the projecting direction of the first projecting portion 332A larger than the dimension in the projecting direction of the second projecting portion 332B. Yes.
  • the second optical sheet 330B is disposed at a position where the first optical sheet 330A is to be disposed, the second projecting portion 332B and the first sheet pressing surface 346A are disposed.
  • the assembly configuration is such that the position of the end of the second optical sheet 330B on the side opposite to the second projecting portion 332B side (side 31b side) is shifted from the predetermined position in the projecting direction by being inserted up to the opposing position. Can be realized.
  • FIGS. 3 A third embodiment of the present invention will be described with reference to FIGS.
  • a liquid crystal display device 410 in which the aspects of the plurality of optical sheets 30 and the sheet pressing surface 46 of the first embodiment are changed is shown.
  • action, and effect similar to above-described embodiment is abbreviate
  • the plurality of optical sheets 430 are disposed at positions where the second protrusions 432B are displaced along the outer peripheral portion 30d (along the Y-axis direction) with respect to the first protrusions 432A.
  • the first protrusion 432A and the second protrusion 432B are stacked on each other so as not to overlap.
  • the plurality of optical sheets 430 are disposed at positions where the third protrusions 432C are displaced along the outer peripheral portion 30d (along the Y-axis direction) with respect to the first protrusions 432A and the second protrusions 432B.
  • first protrusion 432A and the second protrusion 432B and the third protrusion 432C are stacked on each other so as not to overlap.
  • the first protrusion 432A, the second protrusion 432B, and the third protrusion 432C have substantially the same dimensions in the protrusion direction (X-axis direction) and in the direction orthogonal to the protrusion direction (Y-axis direction). It has been done.
  • the plurality of optical sheets 430 are configured such that the first protrusions 432A, the second protrusions 432B, and the third protrusions 432C are spaced apart from each other and arranged in this order.
  • the groove 445 is recessed in the inner surface 44 a so as to follow the outer shape of the first protrusion 432 A, the second protrusion 432 B, and the third protrusion 432 C.
  • the groove portion 445 has a slit shape opening in the inner surface 44 a of the side wall portion 44.
  • the groove portion 445 has a slight clearance in the thickness direction of each optical sheet 430, and is configured to be capable of individually accommodating the first protrusion portion 432A, the second protrusion portion 432B, and the third protrusion portion 432C. .
  • the groove 445 accommodates the first protrusion 432A and the first groove 445 having the first sheet pressing surface 46A, and the second protrusion 432B and the second sheet pressing surface 46B.
  • the second groove portion 445 having the third protrusion portion 432C and the third groove portion 445 having the third sheet pressing surface 46C form an internal space independent from each other.
  • the first groove portion 445, the second groove portion 445, and the third groove portion 445 are, in the Z-axis direction, the first sheet pressing surface 46A (the surface on the panel support portion 41 side of the first groove portion 445) and the sheet support of the second groove portion 445.
  • the surface on the portion 42 side is substantially the same position, and the second sheet pressing surface 46B (the surface on the panel support portion 41 side of the second groove portion 445) and the surface on the sheet support portion 42 side of the third groove portion 445 are substantially the same. It is the same position.
  • the second optical sheet 430B is to be disposed at a position where the first optical sheet 430A is to be disposed, or the first optical sheet is disposed at a position where the second optical sheet 430B is to be disposed.
  • the first protruding portion 432A cannot be inserted into the second groove portion 445B, and the second protruding portion 432B cannot be inserted into the first groove portion 445A. It becomes possible to do. For this reason, the illegal arrangement
  • the plurality of optical sheets 530 are disposed at positions where the second protrusions 532B are displaced along the outer peripheral portion 30d (along the Y-axis direction) with respect to the first protrusions 532A. 532A and the second protrusion 532B are stacked on each other so as not to overlap. Further, the plurality of optical sheets 530 are disposed at positions where the third protrusions 532C are displaced along the outer peripheral portion 30d (along the Y-axis direction) with respect to the first protrusions 532A and the second protrusions 532B. Thus, the first protrusion 532A, the second protrusion 532B, and the third protrusion 532C are stacked so as not to overlap each other.
  • the first protrusion 532A, the second protrusion 532B, and the third protrusion 532C have substantially the same dimensions in the protrusion direction (X-axis direction) and in the direction orthogonal to the protrusion direction (Y-axis direction). It has been done.
  • the plurality of optical sheets 530 are configured such that the first projecting portion 532A, the second projecting portion 532B, and the third projecting portion 532C are spaced apart from each other and arranged in this order.
  • the first optical sheet 530A has the same shape as the second projecting portion 532B and the third projecting portion 532C, and has raised projecting portions 535A and 535A that overlap these. Further, the second optical sheet 530B has the same shape as the third protrusion 532C and has a raised protrusion 535B that overlaps with the third protrusion 532C.
  • the first optical sheet 530A has three protrusions (the first protrusion 532A and the raised protrusions 535A and 535A), and the second optical sheet 530B has two protrusions (first 2 protrusions 532B and raised protrusions 535B), and the third optical sheet 530C has one protrusion (third protrusion 532C), so that the optical sheets 530 can be easily distinguished from each other, and each optical sheet 530 is mistaken. Can be suppressed.
  • the surfaces of the first groove portion 545, the second groove portion 545, and the third groove portion 545 are flush with the sheet support surface 42a in the Z-axis direction.
  • the first groove 545A can accommodate the first protrusion 532A
  • the second groove 545B can accommodate the second protrusion and the raised protrusion 535A
  • the third groove 545C can accommodate the third protrusion and the raised protrusions 535A and 535B. It is made into the composition.
  • FIG. 4 A fourth embodiment of the present invention will be described with reference to FIG.
  • action, and effect similar to above-described embodiment is abbreviate
  • Each of the sheet pressing surfaces 646 (the first sheet pressing surface 646A, the second sheet pressing surface 646B, and the third sheet pressing surface 646C) is formed in plural (two in the present embodiment).
  • the sheet pressing surfaces 646 and 646 are respectively disposed on the one side 31a side and the opposite side 31b side of the plurality of optical sheets 30.
  • the protruding portions 632 (the first protruding portion 632A, the second protruding portion 632B, and the third protruding portion 632C) are arranged on the one side 31a and the opposite side 31b, respectively, corresponding to the position of the sheet pressing surface 646. .
  • the first optical sheet 30A and the second optical sheet 30B can be pressed at a plurality of locations, and preferably the first optical sheet 30A and the second optical sheet 30B are restricted from moving. be able to.
  • the plurality of sides 31a and 31b of the first optical sheet 30A and the second optical sheet 30B can be pressed, respectively, and preferably the first optical sheet 30A and the second optical sheet 30B. Can be controlled.
  • the sheet pressing surfaces 746 and 746 are arranged side by side along one side 31c of the plurality of optical sheets 30.
  • the protrusions 732 (the first protrusion 732A, the second protrusion 732B, and the third protrusion 732C) are aligned along the one side 31c corresponding to the positions of the sheet pressing surfaces 746, 746.
  • Each is arranged. According to such a configuration, one side 31c of the first optical sheet 30A and the second optical sheet 30B can be pressed at a plurality of locations, and even in a larger liquid crystal display device or the like, The movement of the first optical sheet 30A and the second optical sheet 30B can be restricted.
  • the present invention is not limited to the embodiments described with reference to the above description and drawings.
  • the following embodiments are also included in the technical scope of the present invention.
  • the liquid crystal display device including the first optical sheet, the second optical sheet, and the third optical sheet is exemplified, but the present invention is not limited thereto.
  • the liquid crystal display device may not include the third optical sheet, or may include more optical sheets (fourth optical sheet or the like).
  • the configuration in which the frame has a sheet storage space in which four optical sheets can be arranged between the panel support portion and the sheet support surface has been exemplified. Not limited to.
  • the sheet accommodating space only needs to be capable of disposing at least two optical sheets between the panel support portion and the sheet support surface.
  • the first protrusion (second protrusion) of the first optical sheet (second optical sheet) is pressed against the first sheet pressing surface (second sheet pressing surface).
  • the present invention is not limited to this.
  • the first optical sheet (second optical sheet) may not have the first protrusion (second protrusion), and in that case, the first optical sheet (second optical sheet) may be used.
  • the outer periphery of the sheet may be configured to be pressed by the first sheet pressing surface (second sheet pressing surface).
  • first sheet pressing surface second sheet pressing surface
  • first sheet pressing surface second sheet pressing surface
  • first sheet pressing surface may be a protruding end surface of a protruding portion that protrudes from the back surface (the surface facing the sheet supporting surface) of the panel support portion.
  • the sheet pressing surface and the protruding portion are disposed on the pair of short sides of the rectangular optical member.
  • the arrangement of the sheet pressing surface and the protruding portion is this.
  • the sheet pressing surface and the protruding portion may be disposed on the pair of long sides of the rectangular optical member, or may be disposed on each of the four sides.
  • the sheet pressing surface and the protrusion are disclosed to be arranged side by side along the long side of the rectangular optical member.
  • the arrangement of the protrusions is not limited to this.
  • the sheet pressing surface and the protruding portion may be arranged side by side along the short side of the rectangular optical member.
  • the shapes of the panel support part, the sheet support surface (sheet support part), and the side wall part can be changed as appropriate.
  • the sheet support surface is exemplified as one surface of the sheet support portion that protrudes from the side wall portion, but the sheet support surface has a stepped side wall portion. May be formed.
  • the LED substrate is disposed so as to face the one end surface on the long side of the light guide plate.
  • the LED substrate is disposed on the one end surface on the short side of the light guide plate.
  • those arranged in an opposing manner are also included in the present invention.
  • the LED substrate is disposed opposite to the pair of end surfaces on the long side of the light guide plate, or the LED substrate is disposed on the pair of end surfaces on the short side of the light guide plate. Those arranged opposite to each other are also included in the present invention.
  • the LED substrate is arranged opposite to any three end surfaces of the light guide plate, or the LED substrate is attached to all four end surfaces of the light guide plate. In addition, those arranged in an opposing manner are also included in the present invention.
  • the LED is used as the light source, but other light sources may be used.
  • the edge light type is exemplified as the backlight device included in the liquid crystal display device, but the present invention includes a backlight device of a direct type.
  • the frame is applied to a display device including a display panel.
  • the frame described in each embodiment is applied to a backlight device (illumination device) that does not include a display panel. Even if it is a case, there can exist the same effect
  • liquid crystal display device in which the liquid crystal panel has a square shape is illustrated, but the shape of the liquid crystal panel is not limited thereto.
  • the TFT is used as the switching element of the liquid crystal display device.
  • the present invention can also be applied to a liquid crystal display device using a switching element other than TFT (for example, a thin film diode (TFD)).
  • a switching element other than TFT for example, a thin film diode (TFD)
  • the present invention can also be applied to a liquid crystal display device for monochrome display.
  • liquid crystal display device using the liquid crystal panel as the display panel is exemplified, but the present invention can be applied to a display device using another type of display panel.
  • first step surface, 33B ... second step surface, 40 ... frame, 41 ... panel support, 42 ... sheet support, 42a ... sheet support Surface, 43 ... sheet housing space (optical member housing space) 44 ... side Parts, 45,145,245,345,445,545 ... groove, 46A, 346A, 646A, 746A ... sheet holding surface, 46B, 346B, 646B, 746B ... sheet holding surface

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Abstract

A liquid crystal display device 10 is provided with the following: a plurality of optical sheets 30, including an LED 21, a first optical sheet 30A, and a second optical sheet 30B; a liquid crystal panel 11 which is, with respect to the plurality of optical sheets 30, disposed on the second optical sheet 30B side. The liquid crystal display device is also provided with a frame 40 which includes the following: a panel supporting part 41; a sheet supporting surface 42a that supports the plurality of optical sheets 30 in an accommodation space 43 which exists between the panel supporting part 41 and the sheet supporting surface; a first sheet pressing surface 46A which opposes a liquid crystal panel 11-side surface 30e of the first optical sheet 30A, and which presses the first optical sheet 30A from the liquid crystal panel 11 side; and a second sheet pressing surface 46B which is configured so that the distance thereto from the sheet supporting surface 42a is greater than the distance to the first sheet pressing surface 46A from the sheet supporting surface 42a, which opposes a liquid crystal panel 11-side surface 30e of the second optical sheet 30B, and which presses the second optical sheet 30B from the liquid crystal panel 11 side.

Description

表示装置Display device
　本発明は、表示装置に関する。 The present invention relates to a display device.
　従来、表示パネルとして自発光しない液晶パネルを備えた液晶表示装置の一例として下記特許文献１に記載されたものが知られている。この特許文献１には、複数の光学シートを第１のフレームと第２のフレームとで挟み込むように保持する構成において、第１のフレームには、光学シートを保持する面に複数の溝が配設され、その複数の溝に複数の光学シートの各々に設けられた突起がそれぞれ嵌合する構成が記載されている。 Conventionally, as an example of a liquid crystal display device including a liquid crystal panel that does not emit light as a display panel, one described in Patent Document 1 below is known. In Patent Document 1, in a configuration in which a plurality of optical sheets are held so as to be sandwiched between a first frame and a second frame, the first frame has a plurality of grooves arranged on a surface for holding the optical sheet. A configuration is described in which the projections provided on each of the plurality of optical sheets are respectively fitted in the plurality of grooves.
特開２００３－３５８９９号公報JP 2003-35899 A
（発明が解決しようとする課題）
　ところで、表示装置に要求される輝度等の光学性能は、その使用目的等に応じて様々である。様々な光学性能を有する表示装置を製造するためには、各表示装置を共通の部品を用いてそれぞれ構成するとともに、光学部材（光学シート）の枚数を適宜変更することによって、所望の光学性能を発揮するように設計することが考えられる。 (Problems to be solved by the invention)
Incidentally, the optical performance such as luminance required for the display device varies depending on the purpose of use. In order to manufacture display devices having various optical performances, each display device is configured using common parts, and the desired optical performance is achieved by appropriately changing the number of optical members (optical sheets). It is possible to design it so that it can be demonstrated.
　このような表示装置においては、光学部材の枚数によってその厚さ寸法が異なるため、最も多くの数（以下、最大数と呼ぶ）の光学部材を用いる場合の厚さ寸法に合わせて、フレーム（第１のフレームと第２のフレーム）に光学部材を収容するため空間を確保しておく必要がある。このようなフレームに、最大数未満の枚数の光学部材を収容する場合には、光学部材の厚さ方向について光学部材を収容するための空間に隙間が生じて、振動等により光学部材がバタつく虞がある。そして、光学部材にバタつきが生じると、光学部材とこれに隣接する部材（例えば、表示パネル等）とが干渉して、隣接する部材や光学部材自体に傷がついて表示品位が損なわれる虞がある。 In such a display device, since the thickness dimension differs depending on the number of optical members, the frame (second number) is matched to the thickness dimension when the largest number (hereinafter referred to as the maximum number) of optical members is used. It is necessary to secure a space for accommodating the optical member in the first frame and the second frame. When the optical member of less than the maximum number is accommodated in such a frame, a gap is generated in the space for accommodating the optical member in the thickness direction of the optical member, and the optical member flutters due to vibration or the like. There is a fear. If the optical member flutters, the optical member and a member adjacent to the optical member (for example, a display panel) interfere with each other, and the adjacent member or the optical member itself may be damaged to deteriorate the display quality. is there.
　本発明は上記のような事情に基づいて完成されたものであって、光学部材のバタつきを抑制して、表示品位が損なわれる事態の発生を抑制することを目的とする。 The present invention has been completed based on the above circumstances, and an object thereof is to suppress the occurrence of a situation in which the display quality is impaired by suppressing the fluttering of the optical member.
（課題を解決するための手段）
　本発明の表示装置は、光源と、前記光源からの光を透過するとともに、透過する光に光学作用を付与するためのシート状をなした複数の光学部材であって、第１の光学部材と、前記第１の光学部材に対して積層する形で配される第２の光学部材と、を含んで構成される複数の光学部材と、前記複数の光学部材に対して前記第２の光学部材側に配されるとともに、前記複数の光学部材を透過した光を利用して表示を行う表示パネルと、前記複数の光学部材の外周部分及び前記表示パネルの外周部分に沿って延在するフレームであって、　前記表示パネルを前記複数の光学部材側から支持するパネル支持部と、前記パネル支持部との間に少なくとも前記複数の光学部材を配置可能な光学部材収容空間を有する形で、前記複数の光学部材を前記表示パネル側とは反対側から支持するシート支持面と、前記第１の光学部材の前記表示パネル側の面と対向状をなし、前記第１の光学部材を前記表示パネル側から押さえる第１シート押さえ面と、前記シート支持面からの距離が前記第１シート押さえ面より大きいものとされるとともに、前記第２の光学部材の前記表示パネル側の面と対向状をなし、前記第２の光学部材を前記表示パネル側から押さえる第２シート押さえ面と、を有するフレームと、を備える。 (Means for solving the problem)
The display device of the present invention includes a light source and a plurality of sheet-shaped optical members for transmitting light from the light source and imparting an optical action to the transmitted light, the first optical member and A plurality of optical members configured to be stacked on the first optical member, and the second optical member with respect to the plurality of optical members. A display panel that is arranged on the side and that performs display using light transmitted through the plurality of optical members, and a frame that extends along an outer peripheral portion of the plurality of optical members and an outer peripheral portion of the display panel. The plurality of optical members in a form having a panel support portion for supporting the display panel from the side of the plurality of optical members, and an optical member accommodating space in which at least the plurality of optical members can be disposed between the panel support portions. The optical member of the display A sheet support surface that is supported from the side opposite to the flannel side and a surface of the first optical member facing the display panel side, and a first sheet pressing member that presses the first optical member from the display panel side And the distance from the sheet support surface is larger than the first sheet pressing surface, and is opposed to the surface of the second optical member on the display panel side, and the second optical member A frame having a second sheet pressing surface for pressing from the display panel side.
　本発明によれば、フレームが、パネル支持部とシート支持面との間に複数の光学部材を配置可能な光学部材収容空間を有する構成において、第１の光学部材と第２の光学部材とをそれぞれ押さえる第１シート押さえ面と第２シート押さえ面とを有するから、パネル支持部とシート支持面との間で第１の光学部材と第２の光学部材とがそれぞれ動くことを規制することができる。このため、パネル支持部とシート支持面との間に配置される光学部材の枚数が、パネル支持部とシート支持面との間に配置可能な最大数より少ない場合であっても、第１の光学部材又は／及び第２の光学部材が隣接する他の部材（表示パネル等）と干渉して、当該他の部材や干渉した光学部材自体に傷がつく事態の発生を抑制することができる。 According to the present invention, in the configuration in which the frame has an optical member housing space in which a plurality of optical members can be disposed between the panel support portion and the sheet support surface, the first optical member and the second optical member are provided. Since the first sheet pressing surface and the second sheet pressing surface are respectively pressed, it is possible to regulate the movement of the first optical member and the second optical member between the panel support portion and the sheet support surface. it can. Therefore, even when the number of optical members arranged between the panel support portion and the sheet support surface is smaller than the maximum number that can be arranged between the panel support portion and the sheet support surface, The occurrence of a situation in which the optical member or / and the second optical member interfere with other adjacent members (display panel or the like) and the other optical member or the interfered optical member itself is damaged can be suppressed.
　本発明の実施態様として、次の構成が好ましい。
　（１）前記第１の光学部材には、前記外周部分から外方に向けて突出する形で前記第１シート押さえ面に押さえられる第１突出部が形成され、前記第２の光学部材には、前記外周部分から外方に向けて突出する形で前記第２シート押さえ面に押さえられる第２突出部が形成されている。このような構成によれば、第１の光学部材及び第２の光学部材のうち、第１シート押さえ面及び第２シート押さえ面にそれぞれ押さえられる部分が当該光学部材の外周部分を全体的に外方に向けて拡げる形で形成される場合に比べて、第１の光学部材及び第２の光学部材を小型化することができる。 The following configuration is preferable as an embodiment of the present invention.
(1) The first optical member is formed with a first protruding portion that is pressed against the first sheet pressing surface so as to protrude outward from the outer peripheral portion, and the second optical member includes A second protruding portion that is pressed against the second sheet pressing surface is formed so as to protrude outward from the outer peripheral portion. According to such a configuration, the portions of the first optical member and the second optical member that are respectively pressed by the first sheet pressing surface and the second sheet pressing surface completely exclude the outer peripheral portion of the optical member. The first optical member and the second optical member can be downsized as compared with the case where the first optical member and the second optical member are formed so as to expand toward the direction.
　（２）前記フレームは、前記複数の光学部材を囲む形をなす側壁部を更に有し、前記側壁部には、前記第１突出部及び前記第２突出部を収容する溝部が形成され、前記第１シート押さえ面及び前記第２シート押さえ面は、前記溝部の内面のうち前記パネル支持部側に位置する面とされている。このような構成によれば、第１の光学部材及び第２の光学部材をパネル支持部とシート支持面との間に収容するのに伴って、第１突出部及び第２突出部を溝部に挿入することができ、第１シート押さえ面及び第２シート押さえ面と第１の光学部材と第２の光学部材とが互いに対向する配置とし易く、好適である。 (2) The frame further includes a side wall portion that surrounds the plurality of optical members, and the side wall portion includes a groove portion that accommodates the first protrusion portion and the second protrusion portion. The first sheet pressing surface and the second sheet pressing surface are surfaces positioned on the panel support portion side of the inner surface of the groove portion. According to such a configuration, as the first optical member and the second optical member are accommodated between the panel support portion and the sheet support surface, the first protrusion portion and the second protrusion portion are formed into the groove portions. The first sheet pressing surface and the second sheet pressing surface, the first optical member, and the second optical member can be easily arranged to face each other, which is preferable.
　（３）前記複数の光学部材は、前記第１突出部で少なくとも構成される第１段面と、前記第１段面に前記第２突出部が重なることで少なくとも構成される第２段面とが、段差状をなすようにして互いに積層され、前記溝部の内面は、前記第１シート押さえ面と前記第２シート押さえ面とが、前記第１段面と前記第２段面とにそれぞれ倣う形で段差状をなして形成されている。このような構成によれば、第２シート押さえ面が第２突出部と共に第１突出部をも押さえるものとすることができ、より一層好適に、第１の光学部材が動くことを規制することができる。 (3) The plurality of optical members include a first step surface configured at least by the first protrusion, and a second step surface configured at least by overlapping the second protrusion on the first step surface. However, the inner surface of the groove portion is configured so that the first sheet pressing surface and the second sheet pressing surface follow the first step surface and the second step surface, respectively. It is formed in a stepped shape. According to such a configuration, the second sheet pressing surface can press the first protruding portion together with the second protruding portion, and it is more preferable to restrict the movement of the first optical member. Can do.
　（４）前記複数の光学部材は、前記第１突出部の突出方向と直交する方向における寸法が前記第２突出部の突出方向と直交する方向における寸法より大きいものとされることで、段差状をなす構成とされている。このような構成によれば、第１突出部の突出方向と直交する方向における寸法を大きくすることで、第１突出部における第１シート押さえ面に押さえられる面積を十分に確保することができる。このため、例えば第１突出部の突出寸法を大きくして、表示装置における非表示領域の幅寸法を大きくする必要がなく、表示装置の狭額縁化に寄与することができる。 (4) The plurality of optical members are stepped in that the dimension in the direction orthogonal to the protruding direction of the first protruding part is larger than the dimension in the direction orthogonal to the protruding direction of the second protruding part. It is set as the structure which makes. According to such a configuration, by increasing the dimension in the direction orthogonal to the protruding direction of the first protruding portion, it is possible to sufficiently ensure the area pressed by the first sheet pressing surface in the first protruding portion. For this reason, for example, it is not necessary to increase the protruding dimension of the first protruding portion to increase the width dimension of the non-display area in the display device, which can contribute to narrowing the frame of the display device.
　（５）前記複数の光学部材は、前記第１突出部の突出方向における寸法が前記第２突出部の突出方向における寸法より大きいものとされることで、段差状をなす構成とされている。このような構成によれば、仮に第１の光学部材を配置すべき位置に第２の光学部材を配置してしまった場合には、第２突出部が第１シート押さえ面と対向する位置まで挿入されて、第２の光学部材の第２突出部側とは反対側の端部の位置が、所定の位置より突出方向にずれるような組み付け構成を実現することができる。このため、複数の光学部材を配置する際に、光学部材の不正配置を目視にて検出することが可能となる。この結果、光学部材の不正配置を抑制して、表示装置の表示品位が損なわれる事態の発生を抑制することができる。 (5) The plurality of optical members are configured to have a step shape by making the dimension in the projecting direction of the first projecting part larger than the dimension in the projecting direction of the second projecting part. According to such a configuration, if the second optical member is disposed at a position where the first optical member is to be disposed, the second projecting portion reaches the position facing the first sheet pressing surface. It is possible to realize an assembly configuration in which the position of the end portion of the second optical member opposite to the second projecting portion side is shifted from the predetermined position in the projecting direction by being inserted. For this reason, when arrange | positioning a some optical member, it becomes possible to detect the illegal arrangement | positioning of an optical member visually. As a result, the illegal arrangement of the optical member can be suppressed, and the occurrence of a situation in which the display quality of the display device is impaired can be suppressed.
　（６）前記複数の光学部材は、前記第１突出部に対して前記第２突出部が前記外周部分に沿ってずれた位置に配設されることで、前記第１突出部と前記第２突出部が重ならないようにして互いに積層され、前記溝部は、前記第１突出部を収容するとともに前記第１シート押さえ面を有する第１溝部と、前記第２突出部を収容するとともに前記第２シート押さえ面を有する第２溝部とが、互いに独立した内部空間を形成する構成とされている。このような構成によれば、仮に第１の光学部材を配置すべき位置に第２の光学部材を配置しようとした場合、または、第２の光学部材を配置すべき位置に第１の光学部材を配置しようとした場合には、それぞれ、第１突出部を第２溝部に、第２突出部を第１溝部に挿入することができず、光学部材の不正配置を検出することが可能となる。このため、光学部材の不正配置を抑制して、表示装置の表示品位が損なわれる事態の発生を抑制することができる。 (6) The plurality of optical members are disposed at a position where the second protrusion is displaced along the outer peripheral portion with respect to the first protrusion, so that the first protrusion and the second protrusion are disposed. The groove portions are stacked so as not to overlap each other, and the groove portion accommodates the first protrusion portion and the first groove portion having the first sheet pressing surface, and the second protrusion portion and the second protrusion portion. The second groove portion having the sheet pressing surface forms an internal space independent from each other. According to such a configuration, if the second optical member is to be disposed at a position where the first optical member is to be disposed, or the first optical member is disposed at a position where the second optical member is to be disposed. When trying to arrange the first projection part into the second groove part and the second projection part into the first groove part, respectively, it becomes possible to detect improper placement of the optical member. . For this reason, the illegal arrangement | positioning of an optical member can be suppressed and generation | occurrence | production of the situation where the display quality of a display apparatus is impaired can be suppressed.
　（７）前記第１シート押さえ面及び前記第２シート押さえ面は、それぞれ複数形成されている。このような構成によれば、第１の光学部材及び第２の光学部材を複数の箇所で押さえることができ、好適に、第１の光学部材及び第２の光学部材が動くことを規制することができる。 (7) A plurality of the first sheet pressing surfaces and the second sheet pressing surfaces are respectively formed. According to such a configuration, the first optical member and the second optical member can be pressed at a plurality of locations, and preferably the first optical member and the second optical member are restricted from moving. Can do.
　（８）前記複数の光学部材は、方形状をなし、複数の前記第１シート押さえ面及び前記第２シート押さえ面は、前記複数の光学部材の複数の辺側にそれぞれ配されている。このような構成によれば、第１の光学部材及び第２の光学部材の複数の辺をそれぞれ押さえることができ、好適に、第１の光学部材及び第２の光学部材が動くことを規制することができる。 (8) The plurality of optical members have a rectangular shape, and the plurality of first sheet pressing surfaces and the second sheet pressing surfaces are respectively arranged on a plurality of sides of the plurality of optical members. According to such a configuration, a plurality of sides of the first optical member and the second optical member can be pressed, respectively, and preferably the movement of the first optical member and the second optical member is restricted. be able to.
　（９）前記複数の光学部材は、方形状をなし、複数の前記第１シート押さえ面及び前記第２シート押さえ面は、前記複数の光学部材の一の辺に沿って、並んで配されている。このような構成によれば、第１の光学部材及び第２の光学部材の一の辺を複数の箇所で押さえることができ、好適に、第１の光学部材及び第２の光学部材が動くことを規制することができる。 (9) The plurality of optical members have a rectangular shape, and the plurality of first sheet pressing surfaces and the second sheet pressing surfaces are arranged side by side along one side of the plurality of optical members. Yes. According to such a configuration, one side of the first optical member and the second optical member can be pressed at a plurality of locations, and preferably the first optical member and the second optical member move. Can be regulated.
　（１０）前記表示パネルは、一対の基板間に液晶を封入してなる液晶パネルとされる。このような表示装置は液晶表示装置として、種々の用途、例えばタブレット型パソコンや携帯型情報端末のディスプレイ等に好適に適用できる。 (10) The display panel is a liquid crystal panel in which liquid crystal is sealed between a pair of substrates. Such a display device can be suitably applied as a liquid crystal display device to various uses such as a display of a tablet personal computer or a portable information terminal.
（発明の効果）
　本発明によれば、光学部材のバタつきを抑制して、表示品位が損なわれる事態の発生を抑制することができる。 (The invention's effect)
ADVANTAGE OF THE INVENTION According to this invention, the occurrence of the situation where display quality is impaired can be suppressed by suppressing the fluttering of the optical member.
本発明の実施形態１に係る液晶表示装置の概略構成を示す分解斜視図1 is an exploded perspective view showing a schematic configuration of a liquid crystal display device according to Embodiment 1 of the present invention. 液晶表示装置を構成する液晶表示ユニットの概略構成を示す分解斜視図Exploded perspective view showing a schematic configuration of a liquid crystal display unit constituting the liquid crystal display device 液晶表示装置における長辺方向（Ｘ軸方向）に沿った断面構成を示す断面図Sectional drawing which shows the cross-sectional structure along the long side direction (X-axis direction) in a liquid crystal display device フレームのシート押さえ面及び光学シートの突出部を示す斜視図The perspective view which shows the sheet | seat pressing surface of a flame | frame, and the protrusion part of an optical sheet 図４の縦断面図（Ｖ－Ｖ線で切断した図に対応）4 is a longitudinal sectional view (corresponding to a view cut along line VV). 図４の縦断面図（ＶＩ－ＶＩ線で切断した図に対応）4 is a longitudinal sectional view (corresponding to a view cut along line VI-VI). 図４の縦断面図（ＶＩＩ－ＶＩＩ線で切断した図に対応）4 is a longitudinal sectional view (corresponding to a view cut along line VII-VII). 図５から図７の横断面図（ＶＩＩＩ－ＶＩＩＩ線で切断した図に対応）Cross-sectional view of FIGS. 5 to 7 (corresponding to a view cut along line VIII-VIII) 実施形態１の変形例１に係るフレームのシート押さえ面および光学シートの突出部を示す縦断面図The longitudinal cross-sectional view which shows the sheet | seat pressing surface of the flame | frame which concerns on the modification 1 of Embodiment 1, and the protrusion part of an optical sheet 図９の横断面図（Ｘ－Ｘ線で切断した図に対応）9 is a cross-sectional view of FIG. 9 (corresponding to a view cut along line XX). 実施形態１の変形例２に係るフレームのシート押さえ面および光学シートの突出部を示す横断面図The cross-sectional view which shows the sheet | seat pressing surface of the flame | frame which concerns on the modification 2 of Embodiment 1, and the protrusion part of an optical sheet 本発明の実施形態２に係るフレームのシート押さえ面および光学シートの突出部を示す斜視図The perspective view which shows the sheet | seat pressing surface of the flame | frame which concerns on Embodiment 2 of this invention, and the protrusion part of an optical sheet. 図１２の縦断面図（ＸＩＩＩ－ＸＩＩＩ線で切断した図に対応）12 (corresponding to a view cut along line XIII-XIII) 本発明の実施形態３に係るフレームのシート押さえ面および光学シートの突出部を示す斜視図The perspective view which shows the sheet | seat pressing surface of the flame | frame which concerns on Embodiment 3 of this invention, and the protrusion part of an optical sheet. 図１４の縦断面図（ＸＶ－ＸＶ線で切断した図に対応）14 (corresponding to a view cut along line XV-XV) 図１５の横断面図（ＸＶＩ－ＸＶＩ線で切断した図に対応）Cross-sectional view of FIG. 15 (corresponding to a view cut along line XVI-XVI) 実施形態３の変形例１に係るフレームのシート押さえ面および光学シートの突出部を示す横断面図The cross-sectional view which shows the sheet | seat pressing surface of the flame | frame which concerns on the modification 1 of Embodiment 3, and the protrusion part of an optical sheet. 本発明の実施形態４に係る液晶表示装置を構成する液晶表示ユニットの概略構成を示す分解斜視図FIG. 6 is an exploded perspective view showing a schematic configuration of a liquid crystal display unit constituting a liquid crystal display device according to Embodiment 4 of the present invention. 実施形態４の変形例１に係る液晶表示装置を構成する液晶表示ユニットの概略構成を示す分解斜視図FIG. 7 is an exploded perspective view showing a schematic configuration of a liquid crystal display unit that constitutes a liquid crystal display device according to a first modification of the fourth embodiment.
　＜実施形態１＞
　本発明の実施形態１を図１から図８によって説明する。本実施形態では、表示装置として液晶表示装置１０について例示する。なお、各図面の一部にはＸ軸、Ｙ軸及びＺ軸を示しており、各軸方向が各図面で示した方向となるように描かれている。また、上下方向については、図３を基準とし、且つ同図上側を表側とするとともに同図下側を裏側とする。 <Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, the liquid crystal display device 10 is illustrated as a display device. In addition, a part of each drawing shows an X axis, a Y axis, and a Z axis, and each axis direction is drawn to be a direction shown in each drawing. In addition, regarding the vertical direction, FIG. 3 is used as a reference, and the upper side of the figure is the front side and the lower side of the figure is the back side.
　液晶表示装置１０は、図１に示すように、全体として横長な方形状をなしており、基幹部品である液晶表示ユニット２０にタッチパネル１４、カバーパネル１５及びケーシング１６などの部品を組み付けてなるものとされる。液晶表示ユニット２０は、表側に画像を表示する表示面１１ｃを有する液晶パネル（表示パネル）１１と、液晶パネル１１の裏側に配されて液晶パネル１１に向けて光を照射するバックライト装置（照明装置）１２と、液晶パネル１１を表側、つまりバックライト装置１２側とは反対側（表示面１１ｃ側）から押さえる筐体フレーム（筐体部材）１３とを有してなる。タッチパネル１４及びカバーパネル１５は、共に液晶表示ユニット２０を構成する筐体フレーム１３内に表側から収容されるとともに、外周部分（外周端部を含む）が筐体フレーム１３によって裏側から支持されている。ケーシング１６は、液晶表示ユニット２０を裏側から覆う形で筐体フレーム１３に組み付けられている。液晶表示装置１０の構成部品のうち、筐体フレーム１３、カバーパネル１５及びケーシング１６が液晶表示装置１０の外観を構成している。本実施形態に係る液晶表示装置１０は、主にタブレット型ノートパソコンやスマートフォンなどの電子機器に用いられるものであり、その画面サイズは、数インチ～２０インチ程度とされ、一般的には小型または中小型に分類される大きさとされている。 As shown in FIG. 1, the liquid crystal display device 10 has a horizontally long rectangular shape as a whole, and is formed by assembling components such as a touch panel 14, a cover panel 15, and a casing 16 to a liquid crystal display unit 20 that is a basic component. It is said. The liquid crystal display unit 20 includes a liquid crystal panel (display panel) 11 having a display surface 11c that displays an image on the front side, and a backlight device (illumination) that is disposed on the back side of the liquid crystal panel 11 and emits light toward the liquid crystal panel 11. Device) 12 and a housing frame (housing member) 13 that holds the liquid crystal panel 11 from the front side, that is, the side opposite to the backlight device 12 side (display surface 11c side). Both the touch panel 14 and the cover panel 15 are accommodated from the front side in a housing frame 13 constituting the liquid crystal display unit 20, and an outer peripheral portion (including an outer peripheral end) is supported from the back side by the housing frame 13. . The casing 16 is assembled to the housing frame 13 so as to cover the liquid crystal display unit 20 from the back side. Of the components of the liquid crystal display device 10, the housing frame 13, the cover panel 15, and the casing 16 constitute the appearance of the liquid crystal display device 10. The liquid crystal display device 10 according to the present embodiment is mainly used for electronic devices such as tablet-type notebook personal computers and smartphones, and has a screen size of about several inches to 20 inches. The size is classified as small and medium.
　まず、液晶表示ユニット２０を構成する液晶パネル１１について詳しく説明する。液晶パネル１１は、図２及び図３に示すように、横長な方形状をなすとともにほぼ透明で優れた透光性を有するガラス製の一対の基板１１ａ，１１ｂと、両基板１１ａ，１１ｂ間に介在し、電界印加に伴って光学特性が変化する物質である液晶分子を含む液晶層（図示せず）とを備え、両基板１１ａ，１１ｂが液晶層の厚さ分のギャップを維持した状態で図示しないシール剤によって貼り合わせられている。この液晶パネル１１は、画像が表示される表示領域と、表示領域を取り囲む額縁状をなすとともに画像が表示されない非表示領域とを有している。非表示領域の一部は、後述するフレーム４０に保持される外周部分１１ｄとされる。なお、液晶パネル１１における長辺方向がＸ軸方向と一致し、短辺方向がＹ軸方向と一致し、さらに厚さ方向がＺ軸方向と一致している。 First, the liquid crystal panel 11 constituting the liquid crystal display unit 20 will be described in detail. As shown in FIGS. 2 and 3, the liquid crystal panel 11 has a horizontally long rectangular shape and is substantially transparent and has a pair of glass substrates 11a and 11b having excellent translucency, and between the substrates 11a and 11b. And a liquid crystal layer (not shown) containing liquid crystal molecules, which are substances whose optical characteristics change with application of an electric field, with both substrates 11a and 11b maintaining a gap corresponding to the thickness of the liquid crystal layer. It is bonded together with a sealing agent (not shown). The liquid crystal panel 11 has a display area in which an image is displayed, and a non-display area that has a frame shape surrounding the display area and in which no image is displayed. A part of the non-display area is an outer peripheral portion 11d held by a frame 40 described later. The long side direction in the liquid crystal panel 11 coincides with the X-axis direction, the short side direction coincides with the Y-axis direction, and the thickness direction coincides with the Z-axis direction.
　両基板１１ａ，１１ｂのうち表側（正面側）がＣＦ基板１１ａとされ、裏側（背面側）がアレイ基板１１ｂとされる。アレイ基板１１ｂにおける内面側（液晶層側、ＣＦ基板１１ａとの対向面側）には、スイッチング素子であるＴＦＴ（Thin Film Transistor）及び画素電極が多数個並んで設けられるとともに、これらＴＦＴ及び画素電極の周りには、格子状をなすゲート配線及びソース配線が取り囲むようにして配設されている。各配線には、図示しない制御回路から所定の画像信号が供給されるようになっている。画素電極は、ＩＴＯ（Indium Tin Oxide：酸化インジウム錫）或いはＺｎＯ（Zinc Oxide：酸化亜鉛）といった透明電極からなる。 Among the substrates 11a and 11b, the front side (front side) is the CF substrate 11a, and the back side (back side) is the array substrate 11b. On the inner surface side (the liquid crystal layer side, the surface facing the CF substrate 11a) of the array substrate 11b, a number of TFTs (Thin Film Transistors) and pixel electrodes, which are switching elements, are provided side by side. A gate wiring and a source wiring having a lattice shape are disposed around the gate. A predetermined image signal is supplied to each wiring from a control circuit (not shown). The pixel electrode is made of a transparent electrode such as ITO (Indium Tin Oxide) or ZnO (Zinc Oxide).
　一方、ＣＦ基板１１ａには、各画素に対応した位置に多数個のカラーフィルタが並んで設けられている。カラーフィルタは、Ｒ，Ｇ，Ｂの三色が交互に並ぶ配置とされる。各カラーフィルタ間には、混色を防ぐための遮光層（ブラックマトリクス）が形成されている。カラーフィルタ及び遮光層の表面には、アレイ基板１１ｂ側の画素電極と対向する対向電極が設けられている。このＣＦ基板１１ａは、アレイ基板１１ｂよりも一回り小さい大きさとされる。また、両基板１１ａ，１１ｂの内面側には、液晶層に含まれる液晶分子を配向させるための配向膜がそれぞれ形成されている。なお、両基板１１ａ，１１ｂの外面側には、それぞれ偏光板１１ｃ，１１ｄが貼り付けられている（図３を参照）。 On the other hand, on the CF substrate 11a, a large number of color filters are arranged side by side at positions corresponding to the respective pixels. The color filter is arranged so that three colors of R, G, and B are alternately arranged. A light shielding layer (black matrix) for preventing color mixture is formed between the color filters. A counter electrode facing the pixel electrode on the array substrate 11b side is provided on the surface of the color filter and the light shielding layer. The CF substrate 11a is slightly smaller than the array substrate 11b. An alignment film for aligning liquid crystal molecules contained in the liquid crystal layer is formed on the inner surfaces of both the substrates 11a and 11b. Note that polarizing plates 11c and 11d are attached to the outer surface sides of both the substrates 11a and 11b, respectively (see FIG. 3).
　続いて、液晶表示ユニット２０を構成するバックライト装置１２について詳しく説明する。バックライト装置１２は、図１に示すように、全体として液晶パネル１１と同様に横長の略ブロック状をなしている。バックライト装置１２は、図２及び図３に示すように、光源であるＬＥＤ（Light Emitting Diode：発光ダイオード）２１と、ＬＥＤ２１が実装されたＬＥＤ基板（光源基板）２２と、ＬＥＤ２１からの光を導光する導光板２３と、導光板２３上に積層配置される複数の光学シート（光学部材）３０と、導光板２３、光学シート３０及び液晶パネル１１を保持するフレーム４０と、フレーム４０との間にＬＥＤ基板２２及び導光板２３を収容するシャーシ２５と、を備える。このバックライト装置１２は、その外周部分のうち長辺側の一端部にＬＥＤ２１（ＬＥＤ基板２２）が偏在する形で配された、いわゆるエッジライト型（サイドライト型）とされる。 Subsequently, the backlight device 12 constituting the liquid crystal display unit 20 will be described in detail. As shown in FIG. 1, the backlight device 12 has a horizontally long and substantially block shape as in the liquid crystal panel 11 as a whole. As shown in FIGS. 2 and 3, the backlight device 12 includes an LED (Light Emitting Diode) 21 that is a light source, an LED substrate (light source substrate) 22 on which the LED 21 is mounted, and light from the LED 21. A light guide plate 23 that guides light, a plurality of optical sheets (optical members) 30 that are stacked on the light guide plate 23, a frame 40 that holds the light guide plate 23, the optical sheet 30, and the liquid crystal panel 11; And a chassis 25 for accommodating the LED substrate 22 and the light guide plate 23 therebetween. The backlight device 12 is a so-called edge light type (side light type) in which LEDs 21 (LED substrates 22) are unevenly distributed at one end on the long side of the outer peripheral portion.
　ＬＥＤ２１は、図２及び図３に示すように、ＬＥＤ基板２２に固着される基板部上にＬＥＤチップを樹脂材により封止した構成とされる。基板部に実装されるＬＥＤチップは、主発光波長が１種類とされ、具体的には、青色を単色発光するものが用いられている。その一方、ＬＥＤチップを封止する樹脂材には、ＬＥＤチップから発せられた青色の光により励起されて所定の色を発光する蛍光体が分散配合されており、全体として概ね白色光を発するものとされる。なお、蛍光体としては、例えば黄色光を発光する黄色蛍光体、緑色光を発光する緑色蛍光体、及び赤色光を発光する赤色蛍光体の中から適宜組み合わせて用いたり、またはいずれか１つを単独で用いることができる。このＬＥＤ２１は、ＬＥＤ基板２２に対する実装面とは反対側の面が発光面２１ａとなる、いわゆる頂面発光型とされている。 2 and 3, the LED 21 has a configuration in which an LED chip is sealed with a resin material on a substrate portion fixed to the LED substrate 22. The LED chip mounted on the substrate unit has one main emission wavelength, and specifically, one that emits blue light in a single color is used. On the other hand, the resin material that seals the LED chip is dispersed and blended with a phosphor that emits a predetermined color when excited by the blue light emitted from the LED chip, and generally emits white light as a whole. It is said. In addition, as the phosphor, for example, a yellow phosphor that emits yellow light, a green phosphor that emits green light, and a red phosphor that emits red light are used in appropriate combination, or any one of them is used. It can be used alone. The LED 21 is a so-called top surface light emitting type in which a surface opposite to the mounting surface with respect to the LED substrate 22 is a light emitting surface 21a.
　ＬＥＤ基板２２は、図２及び図３に示すように、Ｘ軸方向（導光板２３及びシャーシ２５の長辺方向）に沿って延在する、長手の板状をなしており、その板面をＸ軸方向及びＺ軸方向に並行させた姿勢、すなわち液晶パネル１１及び導光板２３の板面と直交させた姿勢でフレーム４０（シート支持部４２）とシャーシ２５の間に収容されている。つまり、このＬＥＤ基板２２は、板面における長辺方向がＸ軸方向と、短辺方向がＺ軸方向とそれぞれ一致し、さらには板面と直交する板厚方向がＹ軸方向と一致した姿勢とされる。ＬＥＤ基板２２は、その内側を向いた板面（実装面２２ａ）が導光板２３における一方の長辺側の端面（光入射面２３ｂ）に対してＹ軸方向について所定の間隔を空けつつ対向状に配されている。従って、ＬＥＤ２１及びＬＥＤ基板２２と導光板２３との並び方向は、Ｙ軸方向とほぼ一致している。このＬＥＤ基板２２は、その長さ寸法が導光板２３の長辺寸法とほぼ同じ程度とされており、後述するシャーシ２５における長辺側の一端部に取り付けられている。 As shown in FIGS. 2 and 3, the LED substrate 22 has a long plate shape extending along the X-axis direction (the long side direction of the light guide plate 23 and the chassis 25). It is accommodated between the frame 40 (sheet support part 42) and the chassis 25 in a posture parallel to the X-axis direction and the Z-axis direction, that is, a posture orthogonal to the plate surfaces of the liquid crystal panel 11 and the light guide plate 23. That is, the LED substrate 22 has a posture in which the long side direction on the plate surface coincides with the X-axis direction, the short side direction coincides with the Z-axis direction, and the plate thickness direction orthogonal to the plate surface coincides with the Y-axis direction. It is said. The LED substrate 22 is opposed to the inner surface of the light guide plate 23 (mounting surface 22a) with a predetermined interval in the Y-axis direction with respect to the end surface on one long side (light incident surface 23b) of the light guide plate 23. It is arranged in. Therefore, the alignment direction of the LED 21 and the LED substrate 22 and the light guide plate 23 substantially coincides with the Y-axis direction. The LED substrate 22 has a length dimension that is substantially the same as the long side dimension of the light guide plate 23 and is attached to one end portion of the long side of the chassis 25 described later.
　ＬＥＤ基板２２のうち内側、つまり導光板２３側を向いた板面（導光板２３との対向面）には、図３に示すように、上記した構成のＬＥＤ２１が表面実装されており、ここが実装面２２ａとされる。ＬＥＤ２１は、ＬＥＤ基板２２の実装面２２ａにおいて、その長さ方向（Ｘ軸方向）に沿って複数が所定の間隔を空けつつ一列に（直線的に）並列配置されている。つまり、ＬＥＤ２１は、バックライト装置１２における長辺側の一端部において長辺方向に沿って複数ずつ間欠的に並列配置されていると言える。また、ＬＥＤ基板２２の実装面２２ａには、Ｘ軸方向に沿って延在するとともにＬＥＤ２１群を横切って隣り合うＬＥＤ２１同士を直列接続する、金属膜（銅箔など）からなる配線パターン（図示せず）が形成されており、この配線パターンの両端部に形成された端子部が外部のＬＥＤ駆動回路に接続されることで、駆動電力を各ＬＥＤ２１に供給することが可能とされる。また、ＬＥＤ基板２２の基材は、シャーシ２５と同様に金属製とされ、その表面に絶縁層を介して既述した配線パターン（図示せず）が形成されている。なお、ＬＥＤ基板２２の基材に用いる材料としては、セラミックなどの絶縁材料を用いることも可能である。 On the inner side of the LED substrate 22, that is, on the plate surface facing the light guide plate 23 side (the surface facing the light guide plate 23), as shown in FIG. The mounting surface 22a is used. A plurality of the LEDs 21 are arranged in a line (linearly) in parallel on the mounting surface 22a of the LED substrate 22 along the length direction (X-axis direction) with a predetermined interval. That is, it can be said that the LEDs 21 are intermittently arranged in parallel along the long side direction at one end on the long side of the backlight device 12. Further, a wiring pattern (not shown) made of a metal film (such as copper foil) is provided on the mounting surface 22a of the LED substrate 22 and extends in the X-axis direction and connects adjacent LEDs 21 in series across the LED 21 group. And the terminal portions formed at both ends of the wiring pattern are connected to an external LED driving circuit, so that driving power can be supplied to each LED 21. Further, the base material of the LED substrate 22 is made of metal like the chassis 25, and the wiring pattern (not shown) described above is formed on the surface thereof via an insulating layer. In addition, as a material used for the base material of LED board 22, insulating materials, such as a ceramic, can also be used.
　導光板２３は、図２及び図３に示すように、屈折率が空気よりも十分に高く且つほぼ透明な（透光性に優れた）合成樹脂材料（例えばアクリルなど）からなる。導光板２３は、液晶パネル１１と同様に平面に視て横長の方形状をなす平板状とされており、その板面が液晶パネル１１の板面（表示面１１ｃ）に並行している。導光板２３は、その板面における長辺方向がＸ軸方向と、短辺方向がＹ軸方向とそれぞれ一致し、且つ板面と直交する板厚方向がＺ軸方向と一致している。導光板２３は、シャーシ２５内において液晶パネル１１及び光学シート３０の直下位置に配されており、その外周端面のうちの一方の長辺側の端面がシャーシ２５における長辺側の一端部に配されたＬＥＤ基板２２の各ＬＥＤ２１とそれぞれ対向状をなしている。従って、ＬＥＤ２１（ＬＥＤ基板２２）と導光板２３との並び方向がＹ軸方向と一致するのに対して、光学シート３０（液晶パネル１１）と導光板２３との並び方向（重なり方向）がＺ軸方向と一致しており、両並び方向が互いに直交するものとされる。そして、導光板２３は、ＬＥＤ２１からＹ軸方向に沿って発せられた光を長辺側の端面から導入するとともに、その光を内部で伝播させつつ光学シート３０側（表側、光出射側）へ向くよう立ち上げて板面から出射させる機能を有する。 As shown in FIGS. 2 and 3, the light guide plate 23 is made of a synthetic resin material (for example, acrylic) having a refractive index sufficiently higher than that of air and substantially transparent (excellent translucency). The light guide plate 23 is formed in a flat plate shape that is horizontally long when viewed in a plane, like the liquid crystal panel 11, and the plate surface thereof is parallel to the plate surface (display surface 11 c) of the liquid crystal panel 11. In the light guide plate 23, the long side direction on the plate surface coincides with the X-axis direction, the short side direction coincides with the Y-axis direction, and the plate thickness direction orthogonal to the plate surface coincides with the Z-axis direction. The light guide plate 23 is disposed in the chassis 25 at a position directly below the liquid crystal panel 11 and the optical sheet 30, and one of the outer peripheral end surfaces of the light guide plate 23 is disposed at one end of the chassis 25 on the long side. Each LED 21 on the LED board 22 is opposed to each other. Therefore, the alignment direction of the LED 21 (LED substrate 22) and the light guide plate 23 coincides with the Y-axis direction, whereas the alignment direction (overlapping direction) of the optical sheet 30 (liquid crystal panel 11) and the light guide plate 23 is Z. It is coincident with the axial direction, and both alignment directions are orthogonal to each other. The light guide plate 23 introduces light emitted from the LED 21 along the Y-axis direction from the end surface on the long side, and propagates the light to the optical sheet 30 side (front side, light emission side). It has the function of rising up and emitting from the plate surface.
　平板状をなす導光板２３の板面のうち、表側を向いた面（液晶パネル１１や光学シート３０との対向面）は、図２及び図３に示すように、内部の光を光学シート３０及び液晶パネル１１側に向けて出射させる光出射面２３ａとなっている。導光板２３における板面に対して隣り合う外周端面のうち、Ｘ軸方向（ＬＥＤ２１の並び方向、ＬＥＤ基板２２の長辺方向）に沿って長手状をなす一対の長辺側の端面のうちの一方（図３に示す右側）の端面は、ＬＥＤ２１（ＬＥＤ基板２２）と所定の空間を空けて対向状をなしており、これがＬＥＤ２１から発せられた光が入射される光入射面２３ｂとなっている。光入射面２３ｂは、Ｘ軸方向及びＺ軸方向に沿って並行する面とされ、光出射面２３ａに対して略直交する面とされる。また、ＬＥＤ２１と光入射面２３ｂ（導光板２３）との並び方向は、Ｙ軸方向と一致しており、光出射面２３ａに並行している。なお、導光板２３の外周端面のうち、光入射面２３ｂとは反対側の長辺側の端面及び短辺側の一対の端面は、それぞれＬＥＤ２１とは対向しないＬＥＤ非対向端面とされる。 Of the plate surface of the light guide plate 23 having a flat plate shape, the surface facing the front side (the surface facing the liquid crystal panel 11 and the optical sheet 30) transmits the internal light to the optical sheet 30 as shown in FIGS. In addition, a light emitting surface 23a is formed to emit light toward the liquid crystal panel 11 side. Of the outer peripheral end surfaces adjacent to the plate surface of the light guide plate 23, of the pair of long side end surfaces having a longitudinal shape along the X-axis direction (LED 21 alignment direction, LED substrate 22 long side direction) One end surface (the right side in FIG. 3) is opposed to the LED 21 (LED substrate 22) with a predetermined space therebetween, and this is a light incident surface 23b on which light emitted from the LED 21 is incident. Yes. The light incident surface 23b is a surface that is parallel to the X-axis direction and the Z-axis direction, and is a surface that is substantially orthogonal to the light emitting surface 23a. Further, the alignment direction of the LED 21 and the light incident surface 23b (light guide plate 23) coincides with the Y-axis direction and is parallel to the light emitting surface 23a. Of the outer peripheral end face of the light guide plate 23, the end face on the long side opposite to the light incident face 23b and the pair of end faces on the short side are respectively LED non-facing end faces that do not face the LED 21.
　導光板２３の板面のうち、光出射面２３ａとは反対側の板面２３ｃには、図３に示すように、導光板２３内の光を反射して表側へ立ち上げることが可能な反射シート２４がその全域を覆う形で設けられている。言い換えると、反射シート２４は、シャーシ２５と導光板２３との間に挟まれた形で配されている。なお、導光板２３における光出射面２３ａと反対側の板面２３ｃとの少なくともいずれか一方、または反射シート２４の表面には、導光板２３内の光を散乱させる散乱部（図示せず）などが所定の面内分布を持つようパターニングされており、それにより光出射面２３ａからの出射光が面内において均一な分布となるよう制御されている。 Of the plate surface of the light guide plate 23, the plate surface 23c opposite to the light emitting surface 23a is a reflection capable of reflecting the light in the light guide plate 23 and rising to the front side as shown in FIG. A sheet 24 is provided so as to cover the entire area. In other words, the reflection sheet 24 is disposed between the chassis 25 and the light guide plate 23. Note that a scattering portion (not shown) that scatters the light in the light guide plate 23 is provided on at least one of the light exit surface 23 a and the opposite plate surface 23 c in the light guide plate 23, or on the surface of the reflection sheet 24. Is patterned so as to have a predetermined in-plane distribution, whereby the light emitted from the light exit surface 23a is controlled to have a uniform distribution in the plane.
　光学シート３０は、図２及び図３に示すように、液晶パネル１１及びシャーシ２５と同様に平面に視て横長の方形状をなしている。光学シート３０は、液晶パネル１１と導光板２３との間に介在して配されることで、導光板２３からの出射光を透過するとともにその透過光に所定の光学作用を付与しつつ液晶パネル１１に向けて出射させる。光学シート３０は、複数枚（本実施形態では３枚）が互いに積層される形で配されている。以下の説明において、複数の光学シート３０を互いに区別する場合には、それぞれ導光板２３側から第１の光学シート（第１の光学部材）３０Ａ、第２の光学シート（第２の光学部材）３０Ｂ、第３の光学シート３０Ｃと呼ぶ。具体的な光学シート３０の種類としては、例えば拡散シート、レンズシート、反射型偏光シートなどがあり、これらの中から適宜に選択して使用することが可能である。また、光学シート３０は、液晶表示装置１０に求められる光学性能に応じて、その枚数を適宜変更（本実施形態では、１枚から４枚に変更可能）して使用することが可能である。例えば、液晶表示装置の輝度を、それぞれ３５０ｃｄ／ｍ２、５００ｃｄ／ｍ２、７００ｃｄ／ｍ２の異なる設定値とするために、光学シート３０をそれぞれ２枚、３枚、４枚として使用することができる。光学シート３０の各部の構成については、後に説明する。 As shown in FIGS. 2 and 3, the optical sheet 30 has a horizontally long rectangular shape when seen in a plane, like the liquid crystal panel 11 and the chassis 25. The optical sheet 30 is disposed between the liquid crystal panel 11 and the light guide plate 23 so as to transmit light emitted from the light guide plate 23 and to give a predetermined optical action to the transmitted light. 11 is emitted. The optical sheet 30 is arranged in a form in which a plurality of sheets (three sheets in the present embodiment) are stacked on each other. In the following description, when a plurality of optical sheets 30 are distinguished from each other, the first optical sheet (first optical member) 30A and the second optical sheet (second optical member) are respectively viewed from the light guide plate 23 side. 30B and the third optical sheet 30C. Specific types of the optical sheet 30 include, for example, a diffusion sheet, a lens sheet, a reflective polarizing sheet, and the like, which can be appropriately selected and used. The optical sheet 30 can be used by appropriately changing the number of sheets according to the optical performance required for the liquid crystal display device 10 (in this embodiment, the number can be changed from one to four). For example, the luminance of the liquid crystal display device, in order to respectively 350cd / m 2, 500cd / m 2, different set values of 700 cd / m 2, the use of optical sheets 30 two respectively three, as four Can do. The configuration of each part of the optical sheet 30 will be described later.
　フレーム４０は、図２に示すように、複数の光学シート３０の外周部分３０ｄ及び液晶パネル１１の外周部分１１ｄに沿って延在する略枠状に形成されている。フレーム４０は、合成樹脂製とされ、少なくとも後述するパネル支持部４１とシート支持部４２とが一体的に形成されており、仮にこれらが互いに別部材として設けられる構成に比べて、部品点数を低減可能とされるとともに、これらを互いに組み付けるための工数及び当該組み付けに係る組み付け誤差を低減可能とされる。フレーム４０は、シャーシ２５に組み付けられて、シャーシ２５とともに液晶表示ユニット２０に剛性を付与する構造部材としての役目を果たす。また、フレーム４０は、シート支持部４２が導光板２３の外周部分及びＬＥＤ２１と、液晶パネル１１及び光学シート３０の各外周部分１１ｄ，３０ｄとの間に全周にわたって介在する形で配されており、これらが光学的に独立するように仕切っている。これにより、ＬＥＤ２１から発せられて光入射面２３ｂに入光しない光や導光板２３の端面（光入射面２３ｂ及びＬＥＤ２１とは対向しない３つのＬＥＤ非対向端面）から漏れ出した光を遮光して、液晶パネル１１及び光学シート３０の各外周部分１１ｄ，３０ｄ（特にその端面）に直接入光することを抑制可能とされる。なお、フレーム４０の各部の構成については、後に説明する。 2, the frame 40 is formed in a substantially frame shape extending along the outer peripheral portion 30 d of the plurality of optical sheets 30 and the outer peripheral portion 11 d of the liquid crystal panel 11. The frame 40 is made of synthetic resin, and at least a panel support part 41 and a sheet support part 42, which will be described later, are integrally formed, and the number of parts is reduced compared to a configuration in which these are provided as separate members. It is possible to reduce the man-hours for assembling them together and the assembling error associated with the assembling. The frame 40 is assembled to the chassis 25 and serves as a structural member that gives the liquid crystal display unit 20 rigidity together with the chassis 25. Further, the frame 40 is arranged in such a manner that the sheet support portion 42 is interposed between the outer peripheral portion of the light guide plate 23 and the LED 21 and the outer peripheral portions 11 d and 30 d of the liquid crystal panel 11 and the optical sheet 30. These are partitioned so as to be optically independent. Thereby, the light emitted from the LED 21 and not entering the light incident surface 23b and the light leaking from the end surface of the light guide plate 23 (the light incident surface 23b and the three LED non-opposing end surfaces not facing the LED 21) are blocked. Further, it is possible to suppress direct light incident on each of the outer peripheral portions 11 d and 30 d (particularly the end surfaces) of the liquid crystal panel 11 and the optical sheet 30. The configuration of each part of the frame 40 will be described later.
　シャーシ２５は、例えばアルミニウム板や電気亜鉛めっき綱板（ＳＥＣ）などの熱伝導率に優れた金属板からなり、図２及び図３に示すように、液晶パネル１１と同様に横長の方形状をなす。シャーシ２５には、図示しない爪部が形成されており、シャーシ２５は、爪部がフレームに形成された被嵌合部（不図示）に嵌合することで、フレーム４０と組み付けられている。なお、シャーシ２５とフレーム４０との組み付け構成は、爪嵌合に限られず、適宜設計可能である。そして、シャーシ２５は、導光板２３を裏側（光出射面２３ａ側とは反対側）から支持して、フレーム４０（シート支持部４２）との間で導光板２３を保持（挟持）する構成とされている。さらに、シャーシ２５は、筐体フレーム１３と組み付けられて、筐体フレーム１３との間で、液晶表示ユニット２０を構成する各部を保持（挟持）する構成とされている。シャーシ２５の裏側の空間には、液晶パネル１１の駆動を制御するためのコントロール基板やＬＥＤ２１に駆動電力を供給するＬＥＤ駆動基板などの基板類（不図示）や、電池（不図示）などが収容されている。なお、本実施形態では、シャーシ２５が平板状をなす構成を例示したが、シャーシ２５の構成はこれに限られない。例えば、シャーシ２５は、導光板を支持する底板と、底板の少なくとも一端部から立ち上がる側板と、を有して形成されていてもよい。また、そのような構成において、側板の内面にＬＥＤ基板２２が取り付けられる構成としてもよい。 The chassis 25 is made of a metal plate having excellent thermal conductivity, such as an aluminum plate or an electrogalvanized steel plate (SEC), and has a horizontally long rectangular shape as in the liquid crystal panel 11 as shown in FIGS. Eggplant. The chassis 25 is formed with a claw portion (not shown), and the chassis 25 is assembled with the frame 40 by fitting the claw portion to a fitting portion (not shown) formed on the frame. The assembly configuration of the chassis 25 and the frame 40 is not limited to the claw fitting, and can be designed as appropriate. The chassis 25 supports the light guide plate 23 from the back side (the side opposite to the light emitting surface 23a side), and holds (holds) the light guide plate 23 between the frame 40 (sheet support portion 42). Has been. Further, the chassis 25 is assembled with the housing frame 13 so as to hold (clamp) each part of the liquid crystal display unit 20 with the housing frame 13. In the space on the back side of the chassis 25, a board (not shown) such as a control board for controlling the driving of the liquid crystal panel 11, an LED driving board for supplying driving power to the LEDs 21, and a battery (not shown) are accommodated. Has been. In the present embodiment, the configuration in which the chassis 25 has a flat plate shape is illustrated, but the configuration of the chassis 25 is not limited thereto. For example, the chassis 25 may be formed to include a bottom plate that supports the light guide plate and a side plate that rises from at least one end of the bottom plate. In such a configuration, the LED substrate 22 may be attached to the inner surface of the side plate.
　続いて、液晶表示ユニット２０を構成する光学シート３０及びフレーム４０の各部の構成について説明する。
　複数の光学シート３０の各々には、図４に示すように、外周部分３０ｄから外方に向けて突出する形で突出部３２がそれぞれ設けられている。言い換えれば、複数の光学シート３０の各々は、方形状をなす本体部３１と、本体部３１の一辺３１ａから耳状に突出する突出部３２と、を有している。突出部３２は、本体部３１の一辺３１ａにおける中央部付近に配されている（図２参照）。また、突出部３２は、液晶表示ユニット２０において、ＬＥＤ２１が配される側の辺３１ｂとは反対に配される側の辺３１ａに配されている（図２参照）。このような突出部３２は、後に説明する態様で、フレーム４０に保持される部分とされる。以下の説明においては、第１の光学シート３０Ａに設けられた突出部３２を第１突出部３２Ａと呼び、第２の光学シート３０Ｂに設けられた突出部３２を第２突出部３２Ｂと呼び、第３の光学シート３０Ｃに設けられた突出部３２を第３突出部３２Ｃと呼ぶ。 Then, the structure of each part of the optical sheet 30 and the frame 40 which comprises the liquid crystal display unit 20 is demonstrated.
As shown in FIG. 4, each of the plurality of optical sheets 30 is provided with a protruding portion 32 that protrudes outward from the outer peripheral portion 30d. In other words, each of the plurality of optical sheets 30 includes a main body 31 that has a rectangular shape, and a protrusion 32 that protrudes in an ear shape from one side 31 a of the main body 31. The protruding portion 32 is disposed near the central portion on one side 31a of the main body portion 31 (see FIG. 2). Moreover, the protrusion part 32 is distribute | arranged to the edge | side 31a of the side arrange | positioned opposite to the edge | side 31b by which LED21 is distribute | arranged in the liquid crystal display unit 20 (refer FIG. 2). Such a protruding portion 32 is a portion held by the frame 40 in a manner described later. In the following description, the protrusion 32 provided on the first optical sheet 30A is referred to as a first protrusion 32A, and the protrusion 32 provided on the second optical sheet 30B is referred to as a second protrusion 32B. The protrusion 32 provided on the third optical sheet 30C is referred to as a third protrusion 32C.
　複数の光学シート３０は、図８に示すように、第１突出部３２Ａで少なくとも構成される第１段面３３Ａと、第１段面３３Ａに第２突出部３２Ｂが重なることで構成される第２段面３３Ｂと、第２段面３３Ｂに第３突出部３２Ｃが重なることで構成される第３段面３３Ｃとが、段差状をなすようにして互いに積層されている。第１突出部３２Ａ、第２突出部３２Ｂ、及び第３突出部３２Ｃは、第１突出部３２Ａの突出方向と直交する方向（Ｙ軸方向）における寸法が最も大きく、第３突出部３２Ｃの当該寸法が最も小さいものとされることで、段差状をなす。つまり、複数の光学シート３０は、Ｙ軸方向に沿って、第１段面３３Ａをなす光学シート３０Ａが１枚の部分、第２段面３３Ｂをなす光学シート３０Ａ，３０Ｂが２枚重なる部分、第３段面３３Ｃをなす光学シート３０Ａ，３０Ｂ，３０Ｃが３枚重なる部分が、この順に並んで、光学シート３０Ａ，３０Ｂ，３０Ｃの各厚さ寸法に応じた段差を有する段差部３３を構成している。なお、段差部３３は、Ｙ軸方向における一端側（図８における左側）において段差を有する構成とされるとともに、他端側（図８における右側）において光学シート３０Ａ，３０Ｂ，３０Ｃの各端面が面一状に連なる構成とされている。 As shown in FIG. 8, the plurality of optical sheets 30 includes a first step surface 33 </ b> A configured at least by the first protrusion 32 </ b> A and a second protrusion 32 </ b> B overlapping the first step surface 33 </ b> A. The second step surface 33B and the third step surface 33C configured by the third protrusion portion 32C overlapping the second step surface 33B are stacked on each other so as to form a step. The first protrusion 32A, the second protrusion 32B, and the third protrusion 32C have the largest dimension in the direction (Y-axis direction) orthogonal to the protrusion direction of the first protrusion 32A, and the third protrusion 32C By making the dimension the smallest, it forms a step. That is, in the plurality of optical sheets 30, along the Y-axis direction, the optical sheet 30A forming the first step surface 33A is a single portion, and the optical sheets 30A and 30B forming the second step surface 33B overlap each other, The portions where the three optical sheets 30A, 30B, 30C forming the third step surface 33C overlap are arranged in this order to form a step portion 33 having a step corresponding to each thickness dimension of the optical sheets 30A, 30B, 30C. ing. The step portion 33 is configured to have a step on one end side (left side in FIG. 8) in the Y-axis direction, and the end surfaces of the optical sheets 30A, 30B, and 30C are on the other end side (right side in FIG. 8). It is set as the structure which continues in a plane.
　フレーム４０は、図３に示すように、液晶パネル１１を裏面側（複数の光学シート３０側）から支持するパネル支持部４１と、複数の光学シート３０を裏面側（液晶パネル１１側とは反対側）から支持するシート支持面４２ａと、複数の光学シート３０を囲む形をなす側壁部４４と、を有して構成されている。本実施形態では、パネル支持部４１と、シート支持面４２ａを有するシート支持部４２は、側壁部４４の内面４４ａから内方に向けて突出する形でそれぞれ形成されている。つまり、フレーム４０は、パネル支持部４１と側壁部４４とシート支持部４２とが断面視Ｕ字状に連なる構成とされている。 As shown in FIG. 3, the frame 40 includes a panel support portion 41 that supports the liquid crystal panel 11 from the back side (a plurality of optical sheets 30 side), and a plurality of optical sheets 30 that are opposite to the back side (the liquid crystal panel 11 side). And a side wall portion 44 that surrounds the plurality of optical sheets 30. In the present embodiment, the panel support portion 41 and the sheet support portion 42 having the sheet support surface 42 a are formed so as to protrude inward from the inner surface 44 a of the side wall portion 44. That is, the frame 40 is configured such that the panel support portion 41, the side wall portion 44, and the sheet support portion 42 are continuous in a U shape in a sectional view.
　パネル支持部４１は、図２及び図３に示すように、液晶パネル１１の外周部分１１ｄに沿って額縁状に形成され、液晶パネル１１の外周部分１１ｄをほぼ全周にわたって裏側から支持することが可能とされる。パネル支持部４１は、側壁部４４のシャーシ２５側とは反対側の面と段差状をなして構成され、当該段差に液晶パネル１１が嵌合する構成とされている。そして、パネル支持部４１は、液晶パネル１１の表側に配された筐体フレーム１３との間で、液晶パネル１１を保持（挟持）する構成とされている。また、パネル支持部４１は、光学シート３０の外周部分３０ｄの少なくとも短辺側の部分を表側から押さえることが可能とされる。なお、パネル支持部４１は、後述するシート押さえ面４６が配される側（図３の左側）に比べて、シート押さえ面４６が配される側とは反対側（図３の右側）において、側壁部４４からの突出寸法が短いものとされており、パネル支持部４１側から光学シート３０をシート支持面４２ａに配置する際にパネル支持部４１と光学シート３０とが干渉し難い構成とされている。 2 and 3, the panel support portion 41 is formed in a frame shape along the outer peripheral portion 11d of the liquid crystal panel 11, and can support the outer peripheral portion 11d of the liquid crystal panel 11 from the back side over almost the entire periphery. It is possible. The panel support portion 41 is configured to have a step shape with the surface of the side wall portion 44 opposite to the chassis 25 side, and the liquid crystal panel 11 is fitted to the step. And the panel support part 41 is set as the structure which hold | maintains (holds) the liquid crystal panel 11 between the housing frames 13 distribute | arranged to the front side of the liquid crystal panel 11. FIG. Further, the panel support portion 41 can press at least the short side portion of the outer peripheral portion 30d of the optical sheet 30 from the front side. In addition, the panel support part 41 is on the opposite side (right side in FIG. 3) to the side on which the sheet pressing surface 46 is arranged, compared to the side (left side in FIG. 3) on which the sheet pressing surface 46 described later is arranged. The projecting dimension from the side wall 44 is short, and the panel support 41 and the optical sheet 30 are unlikely to interfere with each other when the optical sheet 30 is disposed on the sheet support surface 42a from the panel support 41 side. ing.
　シート支持部４２は、図２及び図３に示すように、複数の光学シート３０の外周部分３０ｄに沿って額縁状に形成され、光学シート３０の外周部分３０ｄをほぼ全周にわたって裏側から支持することが可能とされる。シート支持部４２は、側壁部４４の内面４４ａから立ち上がる面のうち、パネル支持部４１側に位置する面がシート支持面４２ａとされている。また、シート支持部４２は、導光板２３について、その外周部分に沿って額縁状に形成され、導光板２３の外周部分をほぼ全周にわたって表側から押さえることが可能とされる。そして、シート支持部４２は、導光板２３及び反射シート２４の裏面側に配されたシャーシ２５との間で、導光板２３及び反射シート２４を保持（挟持）する構成とされている。このシート支持部４２は、パネル支持部４１との間に少なくとも複数の光学シート３０を配置可能なシート収容空間４３を有する形で設けられている。 As shown in FIGS. 2 and 3, the sheet support portion 42 is formed in a frame shape along the outer peripheral portion 30d of the plurality of optical sheets 30, and supports the outer peripheral portion 30d of the optical sheet 30 from the back side over almost the entire periphery. It is possible. Of the surfaces rising from the inner surface 44a of the side wall portion 44, the sheet support portion 42 has a surface positioned on the panel support portion 41 side as a sheet support surface 42a. Moreover, the sheet | seat support part 42 is formed in a frame shape along the outer peripheral part about the light-guide plate 23, and can hold | suppress the outer peripheral part of the light-guide plate 23 from the front side over substantially the whole periphery. The sheet support portion 42 is configured to hold (clamp) the light guide plate 23 and the reflection sheet 24 between the light guide plate 23 and the chassis 25 disposed on the back side of the reflection sheet 24. The sheet support portion 42 is provided in a form having a sheet storage space 43 in which at least a plurality of optical sheets 30 can be disposed between the sheet support portion 42 and the panel support portion 41.
　シート収容空間４３は、図３に示すように、互いに平行状をなして設けられたパネル支持部４１とシート支持部４２の間の隙間とされる。言い換えれば、シート収容空間４３は、複数の光学シート３０を囲む形で延設されるとともに、内方（光学シート３０側）に向けて開口する溝状をなす。そして、シート収容空間４３は、光学シート３０の外周部分３０ｄを収容することで、光学シート３０を液晶パネル１１と導光板２３との間で保持可能な構成とされている。シート収容空間４３は、その内径（パネル支持部４１とシート支持部４２の間の幅寸法）が、当該液晶表示装置１０に使用可能な光学シート３０の最大数（本実施形態では４枚）の厚さ寸法と同等とされ、最大数の光学シート３０をわずかなクリアランスを有して収容可能な構成とされている。言い換えれば、本実施形態では、パネル支持部４１の裏面は、第３の光学シート３０Ｃにさらに積層される第４の光学シート（不図示）の液晶パネル１１側の面と対向状をなし、第４の光学シートを液晶パネル１１側から押さえる第４シート押さえ面として機能すると言える。 The sheet storage space 43 is a gap between the panel support portion 41 and the sheet support portion 42 provided in parallel with each other, as shown in FIG. In other words, the sheet accommodating space 43 extends in a shape surrounding the plurality of optical sheets 30 and has a groove shape that opens toward the inside (on the optical sheet 30 side). And the sheet | seat accommodation space 43 is set as the structure which can hold | maintain the optical sheet 30 between the liquid crystal panel 11 and the light-guide plate 23 by accommodating the outer peripheral part 30d of the optical sheet 30. FIG. The sheet storage space 43 has an inner diameter (a width dimension between the panel support portion 41 and the sheet support portion 42) of the maximum number of optical sheets 30 that can be used in the liquid crystal display device 10 (four in the present embodiment). It is equivalent to the thickness dimension, and is configured to be able to accommodate the maximum number of optical sheets 30 with a slight clearance. In other words, in the present embodiment, the back surface of the panel support portion 41 is opposed to the surface on the liquid crystal panel 11 side of the fourth optical sheet (not shown) further laminated on the third optical sheet 30C, and It can be said that the fourth optical sheet functions as a fourth sheet pressing surface for pressing from the liquid crystal panel 11 side.
　側壁部４４は、図２に示すように、液晶パネル１１の一部と、複数の光学シート３０と、導光板２３の各外周端面を一括して囲む短角筒状をなす。言い換えれば、側壁部４４は、Ｚ軸方向かつＹ軸方向に沿って延在する一対の短辺側部分と、Ｚ軸方向かつＸ軸方向に沿って延在する一対の長辺側部分と、が互いに接続されて方形状をなす構成されている。そして、側壁部４４の内面４４ａのうち、シート収容空間４３に臨んで、シート収容空間４３の奥面４３ａを構成する部分は、光学シート３０の外周端面と対向状をなす。そして、奥面４３ａには、複数の光学シート３０Ａ，３０Ｂ，３０Ｃの第１突出部３２Ａ、第２突出部３２Ｂ、及び第３突出部３２Ｃを収容する溝部４５が形成されている。 As shown in FIG. 2, the side wall 44 has a short rectangular tube shape that collectively surrounds a part of the liquid crystal panel 11, the plurality of optical sheets 30, and the outer peripheral end surfaces of the light guide plate 23. In other words, the side wall portion 44 includes a pair of short side portions extending along the Z-axis direction and the Y-axis direction, and a pair of long side portions extending along the Z-axis direction and the X-axis direction, Are connected to each other to form a square shape. A portion of the inner surface 44 a of the side wall portion 44 that faces the sheet storage space 43 and forms the back surface 43 a of the sheet storage space 43 is opposed to the outer peripheral end surface of the optical sheet 30. And the groove | channel part 45 which accommodates the 1st protrusion part 32A, the 2nd protrusion part 32B, and the 3rd protrusion part 32C of several optical sheet 30A, 30B, 30C is formed in the back surface 43a.
　溝部４５は、図４に示すように、第１突出部３２Ａ、第２突出部３２Ｂ、及び第３突出部３２Ｃの外形に倣う形で内面４４ａに凹設されている。言い換えれば、溝部４５は、側壁部４４の内面４４ａに開口するスリット状をなす。溝部４５は、各光学シート３０の厚さ方向において、わずかなクリアランスを有して、第１突出部３２Ａ、第２突出部３２Ｂ、及び第３突出部３２Ｃを一括して収容可能な構成とされている。 As shown in FIG. 4, the groove 45 is recessed in the inner surface 44a so as to follow the outer shape of the first protrusion 32A, the second protrusion 32B, and the third protrusion 32C. In other words, the groove 45 has a slit shape that opens in the inner surface 44 a of the side wall 44. The groove 45 has a slight clearance in the thickness direction of each optical sheet 30 and is configured to be able to accommodate the first protrusion 32A, the second protrusion 32B, and the third protrusion 32C in a lump. ing.
　さらに、フレーム４０は、図４に示すように、第１の光学シート３０Ａを液晶パネル１１側から押さえる第１シート押さえ面４６Ａと、シート支持面４２ａからの距離が第１シート押さえ面４６Ａより大きいものとされるとともに、第２の光学シート３０Ｂを液晶パネル１１側から押さえる第２シート押さえ面４６Ｂと、シート支持面４２ａからの距離が第２シート押さえ面４６Ｂより大きいものとされるとともに、第３の光学シート３０Ｃを液晶パネル１１側から押さえる第３シート押さえ面４６Ｃと、を有する。なお、以下の説明では、第１シート押さえ面４６Ａ、第２シート押さえ面４６Ｂ、及び第３シート押さえ面４６Ｃを総称して、シート押さえ面４６と呼ぶ場合もある。 Further, as shown in FIG. 4, the frame 40 has a first sheet pressing surface 46A that presses the first optical sheet 30A from the liquid crystal panel 11 side and a distance from the sheet support surface 42a that is larger than the first sheet pressing surface 46A. And the distance from the second sheet pressing surface 46B for pressing the second optical sheet 30B from the liquid crystal panel 11 side and the sheet support surface 42a is larger than the second sheet pressing surface 46B. A third sheet pressing surface 46C for pressing the third optical sheet 30C from the liquid crystal panel 11 side. In the following description, the first sheet pressing surface 46A, the second sheet pressing surface 46B, and the third sheet pressing surface 46C may be collectively referred to as the sheet pressing surface 46.
　第１シート押さえ面４６Ａ、第２シート押さえ面４６Ｂ、及び第３シート押さえ面４６Ｃは、図５から図７に示すように、複数の光学シート３０がシート収容空間４３に収容された状態で、それぞれ第１の光学シート３０Ａ（第１突出部３２Ａ）、第２の光学シート３０Ｂ（第２突出部３２Ｂ）、及び第３の光学シート３０Ｃ（第３突出部３２Ｃ）の液晶パネル１１側の面３０ｅ，３０ｅ，３０ｅと対向状をなしている。また、第１シート押さえ面４６Ａ、第２シート押さえ面４６Ｂ、及び第３シート押さえ面４６Ｃは、それぞれシート支持面４２ａの延在方向（Ｘ軸方向かつＹ軸方向）に沿って延びる面とされている。そして、第１シート押さえ面４６Ａとシート支持面４２ａとの離間距離Ｌ１は、第１の光学シート３０Ａの厚さ寸法と同等とされ、第２シート押さえ面４６Ｂとシート支持面４２ａとの離間距離Ｌ２は、第１の光学シート３０Ａ及び第２の光学シート３０Ｂの厚さ寸法を合算したものと同等とされ、第３シート押さえ面４６ＣＡとシート支持面４２ａとの離間距離Ｌ３は、第１の光学シート３０Ａ、第２の光学シート３０Ｂ、及び第３の光学シート３０Ｃの厚さ寸法を合算したものと同等とされる（図８参照）。つまり、各シート押さえ面４６は、フレーム４０における各光学シート３０の液晶パネル１１側の面３０ｅの位置と対応する位置に、それぞれ設けられている。第１シート押さえ面４６Ａ、第２シート押さえ面４６Ｂ、及び第３シート押さえ面４６Ｃは、シート支持面４２ａからの離間距離がこの順で大きくなるとともに、複数の光学シート３０の段差部３３に倣う形で段差状をなしている。 As shown in FIGS. 5 to 7, the first sheet pressing surface 46 </ b> A, the second sheet pressing surface 46 </ b> B, and the third sheet pressing surface 46 </ b> C are in a state where a plurality of optical sheets 30 are stored in the sheet storage space 43. The surface on the liquid crystal panel 11 side of the first optical sheet 30A (first protrusion 32A), the second optical sheet 30B (second protrusion 32B), and the third optical sheet 30C (third protrusion 32C), respectively. 30e, 30e, and 30e are opposed. The first sheet pressing surface 46A, the second sheet pressing surface 46B, and the third sheet pressing surface 46C are surfaces extending along the extending direction (X-axis direction and Y-axis direction) of the sheet support surface 42a, respectively. ing. The separation distance L1 between the first sheet pressing surface 46A and the sheet support surface 42a is equal to the thickness dimension of the first optical sheet 30A, and the separation distance between the second sheet pressing surface 46B and the sheet support surface 42a. L2 is equivalent to the sum of the thickness dimensions of the first optical sheet 30A and the second optical sheet 30B, and the separation distance L3 between the third sheet pressing surface 46CA and the sheet support surface 42a is equal to the first optical sheet 30A and the second optical sheet 30B. This is equivalent to the sum of the thickness dimensions of the optical sheet 30A, the second optical sheet 30B, and the third optical sheet 30C (see FIG. 8). That is, each sheet pressing surface 46 is provided at a position corresponding to the position of the surface 30 e on the liquid crystal panel 11 side of each optical sheet 30 in the frame 40. The first sheet pressing surface 46A, the second sheet pressing surface 46B, and the third sheet pressing surface 46C are spaced apart from the sheet support surface 42a in this order, and follow the step portions 33 of the plurality of optical sheets 30. It has a stepped shape.
　シート押さえ面４６（第１シート押さえ面４６Ａ、第２シート押さえ面４６Ｂ、及び第３シート押さえ面４６Ｃ）は、図８に示すように、溝部４５の内面のうちパネル支持部４１側に位置する面とされている。具体的には、溝部４５の内面は、第１シート押さえ面４６Ａ、第２シート押さえ面４６Ｂ、及び第３シート押さえ面４６Ｃが、複数の光学シート３０における第１段面３３Ａ、第２段面３３Ｂ、及び第３段面３３Ｃにそれぞれ倣う形で段差状をなして形成されている。つまり、溝部４５は、シート支持面４２ａとパネル支持部４１との並び方向（Ｚ軸方向）における内径が、段階的に大きくなるようにして形成されている。一方、溝部４５におけるシート押さえ面４６と対向する面は、シート支持部４２のうち光学シート３０の本体部３１が載置されるシート支持面４２ａ（図８で１点破線にて位置を示す）と面一状をなしている。なお、溝部４５の態様はこれに限られず、例えば、溝部４５はそのシート支持部４２側の部分がシート支持部４２を貫通するようにして成形されていてもよい。 The sheet pressing surface 46 (the first sheet pressing surface 46A, the second sheet pressing surface 46B, and the third sheet pressing surface 46C) is located on the panel support portion 41 side of the inner surface of the groove 45 as shown in FIG. It is considered as a surface. Specifically, the inner surface of the groove 45 includes the first sheet pressing surface 46A, the second sheet pressing surface 46B, and the third sheet pressing surface 46C, which are the first step surface 33A and the second step surface of the plurality of optical sheets 30. 33B and the third step surface 33C are formed in steps so as to follow each other. That is, the groove 45 is formed such that the inner diameter in the direction in which the sheet support surface 42a and the panel support 41 are aligned (Z-axis direction) increases stepwise. On the other hand, the surface of the groove 45 that faces the sheet pressing surface 46 is a sheet support surface 42a on which the main body 31 of the optical sheet 30 is placed in the sheet support portion 42 (the position is indicated by a one-dot broken line in FIG. 8). And is in the same plane. The mode of the groove 45 is not limited to this, and the groove 45 may be formed such that a portion on the sheet support 42 side penetrates the sheet support 42.
　続いて、フレーム４０に複数の光学シート３０を組み付ける態様について、図４を用いて説明する。なお、図４においては、溝部４５の構成を見やすくするために、パネル支持部４１の溝部４５の上方に位置する部分を切り欠く形で示している。また、図４においては、導光板２３を省略して示している。 Subsequently, a mode of assembling a plurality of optical sheets 30 to the frame 40 will be described with reference to FIG. In FIG. 4, in order to make the configuration of the groove portion 45 easier to see, a portion of the panel support portion 41 located above the groove portion 45 is cut out. In FIG. 4, the light guide plate 23 is omitted.
　まず、フレーム４０を、シート支持面４２ａが上方を向く姿勢で作業台に載置する。そして、作業者は、第１の光学シート３０Ａの外周部分３０ｄを、フレーム４０のシート収容空間４３に収容する。具体的には、最初に、第１の光学シート３０Ａの一辺３１ａ側を、シート収容空間４３のシート押さえ面４６が設けられた辺側に挿入する。すると、シート収容空間４３における第１の光学シート３０Ａの第１突出部３２Ａと対応する位置には溝部４５が開口しており、第１の光学シート３０Ａをシート収容空間４３に挿入するのに伴って、溝部４５内に第１突出部３２Ａが挿入される。次に、第１の光学シート３０Ａの対向辺３１ｂ側の外周部分３０ｄをシート収容空間４３に収容して、第１の光学シート３０Ａをシート支持面４２ａに載置する。この状態では、第１突出部３２Ａの一部（図８に示す左側１／３の部分）が、ほとんど隙間のない状態で第１シート押さえ面４６Ａと対向配置されるとともに、他部（図８に示す右側２／３の部分）が第２シート押さえ面４６Ｂ（第３シート押さえ面４６Ｃ）とシート支持面４２ａとの間のシート支持面４２ａ側の空間を一部埋める形で配置される。 First, the frame 40 is placed on the work table with the seat support surface 42a facing upward. Then, the operator accommodates the outer peripheral portion 30 d of the first optical sheet 30 </ b> A in the sheet accommodation space 43 of the frame 40. Specifically, first, the side 31a side of the first optical sheet 30A is inserted into the side of the sheet storage space 43 where the sheet pressing surface 46 is provided. Then, the groove 45 opens at a position corresponding to the first projecting portion 32 </ b> A of the first optical sheet 30 </ b> A in the sheet accommodation space 43, and as the first optical sheet 30 </ b> A is inserted into the sheet accommodation space 43. Thus, the first protrusion 32 </ b> A is inserted into the groove 45. Next, the outer peripheral portion 30d on the opposite side 31b side of the first optical sheet 30A is accommodated in the sheet accommodating space 43, and the first optical sheet 30A is placed on the sheet support surface 42a. In this state, a part of the first protrusion 32A (the left third part shown in FIG. 8) is arranged to face the first sheet pressing surface 46A with almost no gap, and the other part (FIG. 8). 2/3) is disposed so as to partially fill the space on the sheet support surface 42a side between the second sheet pressing surface 46B (third sheet pressing surface 46C) and the sheet supporting surface 42a.
　次に、作業者は、第１の光学シート３０Ａに積層する形で、第２の光学シート３０Ｂの外周部分３０ｄを、フレーム４０のシート収容空間４３に収容する。具体的な態様は、第１の光学シート３０Ａをシート収容空間４３に収容する態様と同様であり、その説明を省略する。この状態では、第２突出部３２Ｂが第１突出部３２Ａにより嵩上げされて、第２突出部３２Ｂの一部（図８に示す左側１／２の部分）が、ほとんど隙間のない状態で第２シート押さえ面４６Ｂと対向配置されるとともに、他部（図８に示す右側１／２の部分）が第３シート押さえ面４６Ｃとシート支持面４２ａとの間のシート支持面４２ａ側の空間を、第１突出部３２Ａとともに一部埋める形で配置される。 Next, the operator accommodates the outer peripheral portion 30d of the second optical sheet 30B in the sheet accommodation space 43 of the frame 40 in a form of being laminated on the first optical sheet 30A. A specific aspect is the same as the aspect in which the first optical sheet 30A is accommodated in the sheet accommodating space 43, and the description thereof is omitted. In this state, the second projecting portion 32B is raised by the first projecting portion 32A, and a part of the second projecting portion 32B (the left half portion shown in FIG. 8) is in the second state with almost no gap. While being disposed opposite to the sheet pressing surface 46B, the other part (the right half portion shown in FIG. 8) is a space on the sheet supporting surface 42a side between the third sheet pressing surface 46C and the sheet supporting surface 42a. The first protrusion 32A and the first protrusion 32A are partly filled.
　さらに、作業者は、第２の光学シート３０Ｂに積層する形で、第３の光学シート３０Ｃの外周部分３０ｄを、フレーム４０のシート収容空間４３に収容する。具体的な態様は、第１の光学シート３０Ａをシート収容空間４３に収容する態様と同様であり、その説明を省略する。この状態では、第３突出部３２Ｃが第１突出部３２Ａ及び第２突出部３２Ｂにより嵩上げされて、第３突出部３２Ｃが、ほとんど隙間のない状態で第３シート押さえ面４６Ｃと対向配置される。以上の態様により、複数の光学シート３０のフレーム４０への組み付けが完了する。 Furthermore, the operator accommodates the outer peripheral portion 30d of the third optical sheet 30C in the sheet accommodation space 43 of the frame 40 in a form of being laminated on the second optical sheet 30B. A specific aspect is the same as the aspect in which the first optical sheet 30A is accommodated in the sheet accommodating space 43, and the description thereof is omitted. In this state, the third protrusion 32C is raised by the first protrusion 32A and the second protrusion 32B, and the third protrusion 32C is disposed to face the third sheet pressing surface 46C with almost no gap. . With the above aspect, the assembly of the plurality of optical sheets 30 to the frame 40 is completed.
　なお、液晶表示ユニット２０が第４の光学シートを更に備える場合には、第３の光学シート３０Ｃに積層する形で、第４の光学シートをフレーム４０のシート収容空間４３に収容して、第４の光学シートの外周部分が、ほとんど隙間のない状態でパネル支持部４１の裏面と対向配置されるようにすればよい。液晶表示ユニット２０が第３の光学シート３０Ｃを備えない、つまり、第１の光学シート３０Ａと第２の光学シート３０Ｂのみを備えて構成される場合には、第３シート押さえ面４６Ｃと第２突出部３２Ｂとの間に隙間を有する形としてかまわない。また、本実施形態では、各光学シート３０Ａ，３０Ｂ，３０Ｃを順次にフレーム４０に対して組み付ける態様を説明したが、各光学シート３０Ａ，３０Ｂ，３０Ｃを予め積層しておいて、一括してフレーム４０に組み付ける態様としてもよい。 In the case where the liquid crystal display unit 20 further includes a fourth optical sheet, the fourth optical sheet is accommodated in the sheet accommodating space 43 of the frame 40 so as to be stacked on the third optical sheet 30C. The outer peripheral portion of the optical sheet 4 may be arranged to face the back surface of the panel support portion 41 with almost no gap. When the liquid crystal display unit 20 does not include the third optical sheet 30C, that is, includes only the first optical sheet 30A and the second optical sheet 30B, the third sheet pressing surface 46C and the second optical sheet 30C are provided. It does not matter as a shape having a gap between the protrusion 32B. In the present embodiment, the mode in which the optical sheets 30A, 30B, and 30C are sequentially assembled to the frame 40 has been described. However, the optical sheets 30A, 30B, and 30C are laminated in advance, and the frame is collectively collected. It is good also as an aspect assembled to 40.
　続いて、本実施形態の作用・効果について説明する。
　本実施形態の液晶表示装置１０は、ＬＥＤ２１と、ＬＥＤ２１からの光を透過するとともに、透過する光に光学作用を付与するための複数の光学シート３０であって、第１の光学シート３０Ａと、第１の光学シート３０Ａに対して積層する形で配される第２の光学シート３０Ｂと、を含んで構成される複数の光学シート３０と、複数の光学シート３０に対して第２の光学シート３０Ｂ側に配されるとともに、複数の光学シート３０を透過した光を利用して表示を行う液晶パネル１１と、複数の光学シート３０の外周部分３０ｄ及び液晶パネル１１の外周部分３０ｄに沿って延在するフレーム４０であって、液晶パネル１１を複数の光学シート３０側から支持するパネル支持部４１と、パネル支持部４１との間に少なくとも複数の光学シート３０を配置可能なシート収容空間４３を有する形で、複数の光学シート３０を液晶パネル１１側とは反対側から支持するシート支持面４２ａと、第１の光学シート３０Ａの液晶パネル１１側の面３０ｅと対向状をなし、第１の光学シート３０Ａを液晶パネル１１側から押さえる第１シート押さえ面４６Ａと、シート支持面４２ａからの距離が第１シート押さえ面４６Ａより大きい（Ｌ２＞Ｌ１）ものとされるとともに、第２の光学シート３０Ｂの液晶パネル１１側の面３０ｅと対向状をなし、第２の光学シート３０Ｂを液晶パネル１１側から押さえる第２シート押さえ面４６Ｂと、を有するフレーム４０と、を備えている。 Then, the effect | action and effect of this embodiment are demonstrated.
The liquid crystal display device 10 according to the present embodiment includes an LED 21 and a plurality of optical sheets 30 for transmitting light from the LED 21 and imparting an optical action to the transmitted light, the first optical sheet 30A, A plurality of optical sheets 30 configured to include a second optical sheet 30 </ b> B arranged in a stacked manner on the first optical sheet 30 </ b> A, and a second optical sheet relative to the plurality of optical sheets 30 The liquid crystal panel 11 is arranged on the 30B side and performs display using light transmitted through the plurality of optical sheets 30, and the outer peripheral portion 30d of the plurality of optical sheets 30 and the outer peripheral portion 30d of the liquid crystal panel 11 are extended. A frame support 40 that supports the liquid crystal panel 11 from the plurality of optical sheets 30 side, and at least the plurality of optical sheets 3 between the panel support 41. And a sheet support surface 42a for supporting the plurality of optical sheets 30 from the side opposite to the liquid crystal panel 11 side, and a surface 30e on the liquid crystal panel 11 side of the first optical sheet 30A. And a first sheet pressing surface 46A that presses the first optical sheet 30A from the liquid crystal panel 11 side, and a distance from the sheet support surface 42a that is larger than the first sheet pressing surface 46A (L2> L1). And a frame 40 having a second sheet pressing surface 46B that is opposed to the surface 30e of the second optical sheet 30B on the liquid crystal panel 11 side and presses the second optical sheet 30B from the liquid crystal panel 11 side. It is equipped with.
　本実施形態によれば、フレーム４０が、パネル支持部４１とシート支持面４２ａとの間に複数の光学シート３０を配置可能なシート収容空間４３を有する構成において、第１の光学シート３０Ａと第２の光学シート３０Ｂとをそれぞれ押さえる第１シート押さえ面４６Ａと第２シート押さえ面４６Ｂとを有するから、パネル支持部４１とシート支持面４２ａとの間で第１の光学シート３０Ａと第２の光学シート３０Ｂとがそれぞれ動くことを規制することができる。このため、パネル支持部４１とシート支持部４２との間に配置される光学シート３０の数が、パネル支持部４１とシート支持面４２ａとの間に配置可能な最大数（本実施形態では４枚）より少ない場合であっても、第１の光学シート３０Ａ又は／及び第２の光学シート３０Ｂが隣接する他の部材（液晶パネル１１、導光板２３等）と干渉して、当該他の部材や干渉した光学シート３０自体に傷がつく事態の発生を抑制することができる。 According to the present embodiment, in the configuration in which the frame 40 includes the sheet storage space 43 in which the plurality of optical sheets 30 can be disposed between the panel support portion 41 and the sheet support surface 42a, the first optical sheet 30A and the first optical sheet 30A Since the first sheet pressing surface 46A and the second sheet pressing surface 46B that respectively hold the second optical sheet 30B are provided, the first optical sheet 30A and the second optical sheet 30B are interposed between the panel support portion 41 and the sheet support surface 42a. The movement of the optical sheet 30B can be restricted. For this reason, the number of optical sheets 30 disposed between the panel support portion 41 and the sheet support portion 42 is the maximum number that can be disposed between the panel support portion 41 and the sheet support surface 42a (4 in the present embodiment). Even if the number of the first optical sheet 30A and / or the second optical sheet 30B is less, the other member (the liquid crystal panel 11, the light guide plate 23, etc.) interferes with the other member. Further, it is possible to suppress the occurrence of a situation where the interfered optical sheet 30 itself is damaged.
　具体的には、第１の光学シート３０Ａは、図５に示すように、裏面側に向けて移動しようとすると、第１突出部３２Ａ及び外周部分３０ｄがシート支持面４２ａに当接して、シート支持面４２ａにより当該移動が規制され、かつ、表面側に向けて移動しようとすると、第１突出部３２Ａが第１シート押さえ面４６Ａに当接して、第１シート押さえ面４６Ａにより当該移動が規制される。また、第２の光学シート３０Ｂは、図６に示すように、裏面側に向けて移動しようとすると、第２突出部３２Ｂ及び外周部分３０ｄが第１の光学シート３０Ａに当接して、第１の光学シート３０Ａを介してシート支持面４２ａにより当該移動が規制され、かつ、表面側に向けて移動しようとすると、第２突出部３２Ｂが第２シート押さえ面４６Ｂに当接して、第２シート押さえ面４６Ｂにより当該移動が規制される。また、第３の光学シート３０Ｃは、図７に示すように、裏面側に向けて移動しようとすると、第３突出部３２Ｃ及び外周部分３０ｄが第２の光学シート３０Ｂに当接して、第２の光学シート３０Ｂ及び第１の光学シート３０Ａを介してシート支持面４２ａにより当該移動が規制され、かつ、表面側に向けて移動しようとすると、第３突出部３２Ｃが第３シート押さえ面４６Ｃに当接して、第２シート押さえ面４６Ｂにより当該移動が規制される。このため、各光学シート３０Ａ，３０Ｂ，３０Ｃは、振動等によりバタついて、液晶パネル１１側又は導光板２３側に移動することが抑制される。さらに、各光学シート３０Ａ，３０Ｂ，３０Ｃは、両シート面側から保持されることでその保形性が向上するから、揺動したり波打ったりして、その一部が液晶パネル１１側又は導光板２３側に移動することが抑制される。 Specifically, as shown in FIG. 5, when the first optical sheet 30A tries to move toward the back surface side, the first projecting portion 32A and the outer peripheral portion 30d abut against the sheet support surface 42a, and the sheet When the movement is restricted by the support surface 42a and the movement toward the front surface side is attempted, the first protrusion 32A comes into contact with the first sheet pressing surface 46A, and the movement is regulated by the first sheet pressing surface 46A. Is done. Further, as shown in FIG. 6, when the second optical sheet 30B is moved toward the back surface side, the second projecting portion 32B and the outer peripheral portion 30d come into contact with the first optical sheet 30A, and the first optical sheet 30B When the movement is restricted by the sheet support surface 42a via the optical sheet 30A and the movement toward the surface side, the second protrusion 32B comes into contact with the second sheet pressing surface 46B, and the second sheet The movement is restricted by the pressing surface 46B. Further, as shown in FIG. 7, when the third optical sheet 30C moves toward the back surface side, the third projecting portion 32C and the outer peripheral portion 30d come into contact with the second optical sheet 30B, and the second optical sheet 30C When the movement is restricted by the sheet support surface 42a via the optical sheet 30B and the first optical sheet 30A, and the movement toward the surface side is attempted, the third protrusion 32C is brought into contact with the third sheet pressing surface 46C. The movement is restricted by the second sheet pressing surface 46B. For this reason, each optical sheet 30A, 30B, 30C flutters by vibration etc., and it is suppressed that it moves to the liquid crystal panel 11 side or the light-guide plate 23 side. Furthermore, since each optical sheet 30A, 30B, 30C is held from both sheet surface sides, its shape retention is improved. The movement to the light guide plate 23 side is suppressed.
　上述したような光学シート３０の保持態様は、各光学シート３０Ａ，３０Ｂ，３０Ｃ毎に、個別に作用するものである。つまり、各シート押さえ面４６Ａ，４６Ｂ，４６Ｃは、それぞれ突出部３２Ａ，３２Ｂ，３２Ｃを個別に押さえるから、例えば、液晶表示装置が第３の光学シート３０Ｃを備えない、つまり、第１の光学シート３０Ａと第２の光学シート３０Ｂのみを備えて構成される場合においても、第１シート押さえ面４６Ａが第１突出部３２Ａの移動を規制する態様、及び、第２シート押さえ面４６Ｂが第２突出部３２Ｂの移動を規制する態様は、液晶表示装置１０が第３の光学シート３０Ｃを備える構成と同様に作用し得る。このため、シート収容空間４３に収容可能な光学シート３０の最大数を適宜設定しておけば、光学シート３０の枚数を１から最大数の間で適宜変更して用いることができ、液晶表示装置１０の光学性能を光学シート３０の枚数を変更することで適宜設定可能となる。 The holding mode of the optical sheet 30 as described above acts individually for each of the optical sheets 30A, 30B, and 30C. That is, since each sheet pressing surface 46A, 46B, 46C individually presses the protrusions 32A, 32B, 32C, for example, the liquid crystal display device does not include the third optical sheet 30C, that is, the first optical sheet. Even in the case where only 30A and the second optical sheet 30B are provided, the first sheet pressing surface 46A regulates the movement of the first protruding portion 32A, and the second sheet pressing surface 46B is the second protruding. The mode of restricting the movement of the part 32B can act similarly to the configuration in which the liquid crystal display device 10 includes the third optical sheet 30C. For this reason, if the maximum number of optical sheets 30 that can be accommodated in the sheet accommodating space 43 is appropriately set, the number of optical sheets 30 can be appropriately changed between 1 and the maximum number, and the liquid crystal display device can be used. The optical performance of 10 can be appropriately set by changing the number of optical sheets 30.
　また、本実施形態では、第１の光学シート３０Ａには、外周部分３０ｄから外方に向けて突出する形で第１シート押さえ面４６Ａに押さえられる第１突出部３２Ａが形成され、第２の光学シート３０Ｂには、外周部分３０ｄから外方に向けて突出する形で第２シート押さえ面４６Ｂに押さえられる第２突出部３２Ｂが形成されている。このため、第１の光学シート３０Ａ及び第２の光学シート３０Ｂのうち、第１シート押さえ面４６Ａ及び第２シート押さえ面４６Ｂにそれぞれ押さえられる部分が当該光学シートの外周部分を全体的に外方に向けて拡げる形で形成される場合に比べて、第１の光学シート３０Ａ及び第２の光学シート３０Ｂを小型化することができる。 In the present embodiment, the first optical sheet 30A is provided with a first protruding portion 32A that is pressed by the first sheet pressing surface 46A so as to protrude outward from the outer peripheral portion 30d. The optical sheet 30B is formed with a second protruding portion 32B that is pressed by the second sheet pressing surface 46B so as to protrude outward from the outer peripheral portion 30d. For this reason, portions of the first optical sheet 30A and the second optical sheet 30B that are respectively pressed by the first sheet pressing surface 46A and the second sheet pressing surface 46B completely outwardly surround the outer peripheral portion of the optical sheet. The first optical sheet 30A and the second optical sheet 30B can be reduced in size compared to the case where the first optical sheet 30A and the second optical sheet 30B are formed so as to expand toward the front.
　また、本実施形態では、フレーム４０は、複数の光学シート３０を囲む形をなす側壁部４４を更に有し、側壁部４４には、第１突出部３２Ａ及び第２突出部３２Ｂを収容する溝部４５が形成され、第１シート押さえ面４６Ａ及び第２シート押さえ面４６Ｂは、溝部４５の内面のうちパネル支持部４１側に位置する面とされている。このため、第１の光学シート３０Ａ及び第２の光学シート３０Ｂをパネル支持部４１とシート支持面４２ａとの間に収容するのに伴って、第１突出部３２Ａ及び第２突出部３２Ｂを溝部４５に挿入することができ、第１シート押さえ面４６Ａ及び第２シート押さえ面４６Ｂと第１の光学シート３０Ａと第２の光学シート３０Ｂとが互いに対向する配置とし易く、好適である。 In the present embodiment, the frame 40 further includes a side wall portion 44 that surrounds the plurality of optical sheets 30, and the side wall portion 44 has a groove portion that accommodates the first protruding portion 32 </ b> A and the second protruding portion 32 </ b> B. 45 is formed, and the first sheet pressing surface 46A and the second sheet pressing surface 46B are surfaces located on the panel support portion 41 side of the inner surface of the groove 45. Therefore, as the first optical sheet 30A and the second optical sheet 30B are accommodated between the panel support portion 41 and the sheet support surface 42a, the first protrusion portion 32A and the second protrusion portion 32B are grooved. The first sheet pressing surface 46A, the second sheet pressing surface 46B, the first optical sheet 30A, and the second optical sheet 30B can be easily arranged to face each other, which is preferable.
　また、本実施形態では、複数の光学シート３０は、第１突出部３２Ａで少なくとも構成される第１段面３３Ａと、第１段面３３Ａに第２突出部３２Ｂが重なることで少なくとも構成される第２段面３３Ｂとが、段差状をなすようにして互いに積層され、溝部４５の内面は、第１シート押さえ面４６Ａと第２シート押さえ面４６Ｂとが、第１段面３３Ａと第２段面３３Ｂとにそれぞれ倣う形で段差状をなして形成されている。このため、第２シート押さえ面４６Ｂが第２突出部３２Ｂと共に第１突出部３２Ａをも押さえるものとすることができ、より一層好適に、第１の光学シート３０Ａが動くことを規制することができる。 Further, in the present embodiment, the plurality of optical sheets 30 are configured at least by the first step surface 33A configured by at least the first projecting portion 32A and the second projecting portion 32B overlapping the first step surface 33A. The second step surface 33B is laminated to form a stepped shape, and the inner surface of the groove 45 includes the first sheet pressing surface 46A and the second sheet pressing surface 46B, and the first step surface 33A and the second step. It is formed in a step shape so as to follow the surface 33B. For this reason, the second sheet pressing surface 46B can also press the first protruding portion 32A together with the second protruding portion 32B, and more preferably, the movement of the first optical sheet 30A can be regulated. it can.
　また、本実施形態では、複数の光学シート３０は、第１突出部３２Ａの突出方向と直交する方向（Ｙ軸方向）における寸法が第２突出部３２Ｂの突出方向と直交する方向（Ｙ軸方向）における寸法より大きいものとされることで、段差状をなす構成とされている。このため、第１突出部３２Ａの突出方向と直交する方向における寸法を大きくすることで、第１突出部３２Ａにおける第１シート押さえ面４６Ａに押さえられる面積を十分に確保することができ、例えば第１突出部の突出寸法を大きくして、液晶表示装置における非表示領域の幅寸法を大きくする必要がなく、液晶表示装置１０の狭額縁化に寄与することができる。 In the present embodiment, the plurality of optical sheets 30 have a dimension in the direction (Y-axis direction) orthogonal to the protrusion direction of the first protrusion 32A (Y-axis direction) perpendicular to the protrusion direction of the second protrusion 32B. ) To be larger than the dimension in FIG. For this reason, by increasing the dimension in the direction orthogonal to the protruding direction of the first protruding portion 32A, it is possible to sufficiently secure an area pressed by the first sheet pressing surface 46A in the first protruding portion 32A. It is not necessary to increase the projecting dimension of one projecting portion to increase the width dimension of the non-display area in the liquid crystal display device, which can contribute to narrowing the frame of the liquid crystal display device 10.
　また、本実施形態では、表示パネルは、一対の基板間１１ａ，１１ｂに液晶を封入してなる液晶パネル１１とされる。このような表示装置は液晶表示装置１０として、種々の用途、例えばタブレット型パソコンや携帯型情報端末のディスプレイ等に好適に適用できる。 In this embodiment, the display panel is a liquid crystal panel 11 in which liquid crystal is sealed between a pair of substrates 11a and 11b. Such a display device can be suitably applied to the liquid crystal display device 10 for various uses, such as a display of a tablet personal computer or a portable information terminal.
　［実施形態１の変形例１］
　本発明の実施形態１の変形例１を図９及び図１０によって説明する。この変形例１では、溝部４５の態様を変更した液晶表示装置１１０を示す。 [Modification 1 of Embodiment 1]
Modification 1 of Embodiment 1 of the present invention will be described with reference to FIGS. 9 and 10. In the first modification, a liquid crystal display device 110 in which the aspect of the groove 45 is changed is shown.
　溝部１４５は、第１突出部３２Ａ、第２突出部３２Ｂ、及び第３突出部３２Ｃの外形に倣う形で内面４４ａに立設されたリブ１４５ａで構成されている。言い換えれば、溝部１４５は、側壁部４４の内面４４ａから突出する庇状のリブ１４５ａと、シート支持面４２ａとの間に開口するスリット状をなす。溝部１４５は、各光学シート３０の厚さ方向についてわずかなクリアランスを有して、第１突出部３２Ａ、第２突出部３２Ｂ、及び第３突出部３２Ｃを一括して収容可能な構成とされている。 The groove portion 145 is configured by a rib 145a erected on the inner surface 44a so as to follow the outer shape of the first protrusion 32A, the second protrusion 32B, and the third protrusion 32C. In other words, the groove portion 145 has a slit shape that opens between the flange-shaped rib 145a protruding from the inner surface 44a of the side wall portion 44 and the sheet support surface 42a. The groove portion 145 has a slight clearance in the thickness direction of each optical sheet 30 and is configured to be able to collectively accommodate the first protrusion portion 32A, the second protrusion portion 32B, and the third protrusion portion 32C. Yes.
　［実施形態１の変形例２］
　本発明の実施形態１の変形例２を図１１によって説明する。この変形例２では、溝部４５の態様を変更した液晶表示装置２１０を示す。 [Modification 2 of Embodiment 1]
A second modification of the first embodiment of the present invention will be described with reference to FIG. In the second modification, a liquid crystal display device 210 in which the aspect of the groove 45 is changed is shown.
　溝部２４５は、第１突出部３２Ａ、第２突出部３２Ｂ、及び第３突出部３２Ｃの液晶パネル１１側の面３０ｅに沿って延びる形で、内面４４ａにそれぞれ立設された複数のリブ２４５ａ，２４５ａ，２４５ａで構成されている。言い換えれば、溝部２４５は、側壁部４４の内面４４ａから突出する庇状の各リブ２４５ａと、シート支持面４２ａとの間に開口するスリット状をなす。溝部２４５は、各光学シート３０の厚さ方向についてわずかなクリアランスを有して、第１突出部３２Ａ、第２突出部３２Ｂ、及び第３突出部３２Ｃを一括して収容可能な構成とされている。 The groove portion 245 extends along the surface 30e on the liquid crystal panel 11 side of the first protrusion portion 32A, the second protrusion portion 32B, and the third protrusion portion 32C, and a plurality of ribs 245a, 245a and 245a. In other words, the groove portion 245 has a slit shape that opens between the flange-shaped ribs 245a protruding from the inner surface 44a of the side wall portion 44 and the sheet support surface 42a. The groove portion 245 has a slight clearance in the thickness direction of each optical sheet 30 and is configured to be able to collectively accommodate the first protrusion portion 32A, the second protrusion portion 32B, and the third protrusion portion 32C. Yes.
　＜実施形態２＞
　本発明の実施形態２を図１２及び図１３によって説明する。この実施形態２では、実施形態１の複数の光学シート３０とシート押さえ面４６の態様を変更した液晶表示装置３１０を示す。なお、上記した実施形態と同様の構造、作用及び効果について重複する説明は省略する。 <Embodiment 2>
A second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, a liquid crystal display device 310 in which the aspects of the plurality of optical sheets 30 and the sheet pressing surface 46 of the first embodiment are changed is shown. In addition, the description which overlaps about the structure, an effect | action, and effect similar to above-described embodiment is abbreviate | omitted.
　複数の光学シート３３０は、図１３に示すように、第１突出部３３２Ａで少なくとも構成される第１段面３３Ａと、第１段面３３Ａに第２突出部３３２Ｂが重なることで構成される第２段面３３Ｂと、第２段面３３Ｂに第３突出部３３２Ｃが重なることで構成される第３段面３３Ｃとが、段差状をなすようにして互いに積層されている。第１突出部３３２Ａ、第２突出部３３２Ｂ、及び第３突出部３３２Ｃは、第１突出部３３２Ａの突出方向（Ｘ軸方向）における寸法が最も大きく、第３突出部３３２Ｃの当該寸法が最も小さいものとされることで、段差状をなす。つまり、複数の光学シート３３０は、Ｘ軸方向に沿って、第１段面３３Ａをなす光学シート３３０Ａが１枚の部分、第２段面３３Ｂをなす光学シート３３０Ａ，３３０Ｂが２枚重なる部分、第３段面３３Ｃをなす光学シート３３０Ａ，３３０Ｂ，３３０Ｃが３枚重なる部分が、この順に並んで、光学シート３３０Ａ，３３０Ｂ，３３０Ｃの各厚さ寸法に応じた段差を有する段差部３３を構成している。 As shown in FIG. 13, the plurality of optical sheets 330 includes a first step surface 33A constituted by at least a first protrusion 332A and a second protrusion 332B overlapping the first step surface 33A. The second step surface 33B and the third step surface 33C configured by the third protrusion portion 332C overlapping the second step surface 33B are stacked on each other so as to form a step. The first protrusion 332A, the second protrusion 332B, and the third protrusion 332C have the largest dimension in the protrusion direction (X-axis direction) of the first protrusion 332A, and the third protrusion 332C has the smallest dimension. By being made into a thing, it makes a stepped shape. That is, in the plurality of optical sheets 330, the optical sheet 330A forming the first step surface 33A is one part along the X-axis direction, and the optical sheets 330A and 330B forming the second step surface 33B overlap each other. The portions where the three optical sheets 330A, 330B and 330C forming the third step surface 33C overlap are arranged in this order to form a step portion 33 having a step corresponding to each thickness dimension of the optical sheets 330A, 330B and 330C. ing.
　シート押さえ面３４６（第１シート押さえ面３４６Ａ、第２シート押さえ面３４６Ｂ、及び第３シート押さえ面３４６Ｃ）は、図１３に示すように、溝部３４５の内面のうちパネル支持部４１側に位置する面とされている。具体的には、溝部３４５の内面は、第１シート押さえ面３４６Ａ、第２シート押さえ面３４６Ｂ、及び第３シート押さえ面３４６Ｃが、複数の光学シート３３０における第１段面３３Ａ、第２段面３３Ｂ、及び第３段面３３Ｃにそれぞれ倣う形で段差状をなして形成されている。つまり、溝部３４５は、シート支持面４２ａとパネル支持部４１との並び方向（Ｚ軸方向）における内径が、段階的に大きくなるようにして形成されている。一方、溝部３４５におけるシート押さえ面３４６と対向する面は、シート支持部４２のうち光学シート３３０の本体部３１が載置されるシート支持面４２ａと面一状をなす。なお、溝部３４５の態様はこれに限られず、例えば、溝部３４５はそのシート支持部４２側の部分がシート支持部４２を貫通するようにして成形されていてもよい。 As shown in FIG. 13, the sheet pressing surface 346 (the first sheet pressing surface 346A, the second sheet pressing surface 346B, and the third sheet pressing surface 346C) is positioned on the panel support portion 41 side of the inner surface of the groove portion 345. It is considered as a surface. Specifically, the inner surface of the groove 345 includes the first sheet pressing surface 346A, the second sheet pressing surface 346B, and the third sheet pressing surface 346C, which are the first step surface 33A and the second step surface of the plurality of optical sheets 330. 33B and the third step surface 33C are formed in steps so as to follow each other. That is, the groove part 345 is formed so that the inner diameter in the arrangement direction (Z-axis direction) of the sheet support surface 42a and the panel support part 41 increases stepwise. On the other hand, the surface of the groove 345 that faces the sheet pressing surface 346 is flush with the sheet support surface 42 a on which the main body 31 of the optical sheet 330 is placed in the sheet support 42. Note that the mode of the groove 345 is not limited thereto, and the groove 345 may be formed such that a portion on the sheet support portion 42 side penetrates the sheet support portion 42.
　本実施形態では、複数の光学シート３３０は、第１突出部３３２Ａの突出方向における寸法が第２突出部３３２Ｂの突出方向における寸法より大きいものとされることで、段差状をなす構成とされている。このような構成によれば、仮に第１の光学シート３３０Ａを配置すべき位置に第２の光学シート３３０Ｂを配置してしまった場合には、第２突出部３３２Ｂが第１シート押さえ面３４６Ａと対向する位置まで挿入されて、第２の光学シート３３０Ｂの第２突出部３３２Ｂ側とは反対側（辺３１ｂ側）の端部の位置が、所定の位置より突出方向にずれるような組み付け構成を実現することができる。このため、複数の光学シート３３０を配置する際に、光学シート３３０Ｂの不正配置を目視にて検出することが可能となる。この結果、光学シート３３０の不正配置を抑制して、液晶表示装置３１０の表示品位が損なわれる事態の発生を抑制することができる。 In the present embodiment, the plurality of optical sheets 330 are configured to have a step shape by making the dimension in the projecting direction of the first projecting portion 332A larger than the dimension in the projecting direction of the second projecting portion 332B. Yes. According to such a configuration, if the second optical sheet 330B is disposed at a position where the first optical sheet 330A is to be disposed, the second projecting portion 332B and the first sheet pressing surface 346A are disposed. The assembly configuration is such that the position of the end of the second optical sheet 330B on the side opposite to the second projecting portion 332B side (side 31b side) is shifted from the predetermined position in the projecting direction by being inserted up to the opposing position. Can be realized. For this reason, when arranging the plurality of optical sheets 330, it is possible to visually detect the illegal arrangement of the optical sheet 330B. As a result, unauthorized arrangement of the optical sheet 330 can be suppressed, and occurrence of a situation in which the display quality of the liquid crystal display device 310 is impaired can be suppressed.
　＜実施形態３＞
　本発明の実施形態３を図１４から図１６によって説明する。この実施形態３では、実施形態１の複数の光学シート３０とシート押さえ面４６の態様を変更した液晶表示装置４１０を示す。なお、上記した実施形態と同様の構造、作用及び効果について重複する説明は省略する。 <Embodiment 3>
A third embodiment of the present invention will be described with reference to FIGS. In the third embodiment, a liquid crystal display device 410 in which the aspects of the plurality of optical sheets 30 and the sheet pressing surface 46 of the first embodiment are changed is shown. In addition, the description which overlaps about the structure, an effect | action, and effect similar to above-described embodiment is abbreviate | omitted.
　複数の光学シート４３０は、図１４に示すように、第１突出部４３２Ａに対して第２突出部４３２Ｂが外周部分３０ｄに沿って（Ｙ軸方向に沿って）ずれた位置に配設されることで、第１突出部４３２Ａと第２突出部４３２Ｂが重ならないようにして互いに積層されている。また、複数の光学シート４３０は、第１突出部４３２Ａ及び第２突出部４３２Ｂに対して第３突出部４３２Ｃが外周部分３０ｄに沿って（Ｙ軸方向に沿って）ずれた位置に配設されることで、第１突出部４３２Ａ及び第２突出部４３２Ｂと、第３突出部４３２Ｃとが重ならないようにして互いに積層されている。第１突出部４３２Ａ、第２突出部４３２Ｂ、及び第３突出部４３２Ｃは、その突出方向（Ｘ軸方向）における寸法、および、その突出方向と直交する方向（Ｙ軸方向）における寸法が略同じもとされている。そして、複数の光学シート４３０は、第１突出部４３２Ａ、第２突出部４３２Ｂ、及び第３突出部４３２Ｃが、互いに離間して、この順に並んで配される構成とされている。 As shown in FIG. 14, the plurality of optical sheets 430 are disposed at positions where the second protrusions 432B are displaced along the outer peripheral portion 30d (along the Y-axis direction) with respect to the first protrusions 432A. Thus, the first protrusion 432A and the second protrusion 432B are stacked on each other so as not to overlap. Further, the plurality of optical sheets 430 are disposed at positions where the third protrusions 432C are displaced along the outer peripheral portion 30d (along the Y-axis direction) with respect to the first protrusions 432A and the second protrusions 432B. Thus, the first protrusion 432A and the second protrusion 432B and the third protrusion 432C are stacked on each other so as not to overlap. The first protrusion 432A, the second protrusion 432B, and the third protrusion 432C have substantially the same dimensions in the protrusion direction (X-axis direction) and in the direction orthogonal to the protrusion direction (Y-axis direction). It has been done. The plurality of optical sheets 430 are configured such that the first protrusions 432A, the second protrusions 432B, and the third protrusions 432C are spaced apart from each other and arranged in this order.
　溝部４４５は、図１４および図１５に示すように、第１突出部４３２Ａ、第２突出部４３２Ｂ、及び第３突出部４３２Ｃの外形に倣う形で内面４４ａに凹設されている。言い換えれば、溝部４４５は、側壁部４４の内面４４ａに開口するスリット状をなす。溝部４４５は、各光学シート４３０の厚さ方向についてわずかなクリアランスを有して、第１突出部４３２Ａ、第２突出部４３２Ｂ、及び第３突出部４３２Ｃを個別に収容可能な構成とされている。 As shown in FIGS. 14 and 15, the groove 445 is recessed in the inner surface 44 a so as to follow the outer shape of the first protrusion 432 A, the second protrusion 432 B, and the third protrusion 432 C. In other words, the groove portion 445 has a slit shape opening in the inner surface 44 a of the side wall portion 44. The groove portion 445 has a slight clearance in the thickness direction of each optical sheet 430, and is configured to be capable of individually accommodating the first protrusion portion 432A, the second protrusion portion 432B, and the third protrusion portion 432C. .
　溝部４４５は、図１６に示すように、第１突出部４３２Ａを収容するとともに第１シート押さえ面４６Ａを有する第１溝部４４５と、第２突出部４３２Ｂを収容するとともに第２シート押さえ面４６Ｂを有する第２溝部４４５と、第３突出部４３２Ｃを収容するとともに第３シート押さえ面４６Ｃを有する第３溝部４４５とが、互いに独立した内部空間を形成する構成とされている。第１溝部４４５、第２溝部４４５、第３溝部４４５は、Ｚ軸方向において、第１シート押さえ面４６Ａ（第１溝部４４５のパネル支持部４１側の面）と、第２溝部４４５のシート支持部４２側の面が略同じ位置とされるとともに、第２シート押さえ面４６Ｂ（第２溝部４４５のパネル支持部４１側の面）と、第３溝部４４５のシート支持部４２側の面が略同じ位置とされている。 As shown in FIG. 16, the groove 445 accommodates the first protrusion 432A and the first groove 445 having the first sheet pressing surface 46A, and the second protrusion 432B and the second sheet pressing surface 46B. The second groove portion 445 having the third protrusion portion 432C and the third groove portion 445 having the third sheet pressing surface 46C form an internal space independent from each other. The first groove portion 445, the second groove portion 445, and the third groove portion 445 are, in the Z-axis direction, the first sheet pressing surface 46A (the surface on the panel support portion 41 side of the first groove portion 445) and the sheet support of the second groove portion 445. The surface on the portion 42 side is substantially the same position, and the second sheet pressing surface 46B (the surface on the panel support portion 41 side of the second groove portion 445) and the surface on the sheet support portion 42 side of the third groove portion 445 are substantially the same. It is the same position.
　本実施形態では、仮に第１の光学シート４３０Ａを配置すべき位置に第２の光学シート４３０Ｂを配置しようとした場合、または、第２の光学シート４３０Ｂを配置すべき位置に第１の光学シート４３０Ａを配置しようとした場合には、それぞれ、第１突出部４３２Ａを第２溝部４４５Ｂに、第２突出部４３２Ｂを第１溝部４４５Ａに挿入することができず、光学シート４３０の不正配置を検出することが可能となる。このため、光学シート４３０の不正配置を抑制して、液晶表示装置４１０の表示品位が損なわれる事態の発生を抑制することができる。 In the present embodiment, if the second optical sheet 430B is to be disposed at a position where the first optical sheet 430A is to be disposed, or the first optical sheet is disposed at a position where the second optical sheet 430B is to be disposed. When trying to arrange 430A, the first protruding portion 432A cannot be inserted into the second groove portion 445B, and the second protruding portion 432B cannot be inserted into the first groove portion 445A. It becomes possible to do. For this reason, the illegal arrangement | positioning of the optical sheet 430 can be suppressed and generation | occurrence | production of the situation where the display quality of the liquid crystal display device 410 is impaired can be suppressed.
　［実施形態３の変形例１］
　本発明の実施形態３の変形例１を図１７によって説明する。この変形例１では、光学シート３０及び溝部４５の態様を変更した液晶表示装置５１０を示す。 [Modification 1 of Embodiment 3]
A first modification of the third embodiment of the present invention will be described with reference to FIG. In the first modification, a liquid crystal display device 510 in which aspects of the optical sheet 30 and the groove 45 are changed is shown.
　複数の光学シート５３０は、第１突出部５３２Ａに対して第２突出部５３２Ｂが外周部分３０ｄに沿って（Ｙ軸方向に沿って）ずれた位置に配設されることで、第１突出部５３２Ａと第２突出部５３２Ｂが重ならないようにして互いに積層されている。また、複数の光学シート５３０は、第１突出部５３２Ａ及び第２突出部５３２Ｂに対して第３突出部５３２Ｃが外周部分３０ｄに沿って（Ｙ軸方向に沿って）ずれた位置に配設されることで、第１突出部５３２Ａ及び第２突出部５３２Ｂと、第３突出部５３２Ｃとが重ならないようにして互いに積層されている。第１突出部５３２Ａ、第２突出部５３２Ｂ、及び第３突出部５３２Ｃは、その突出方向（Ｘ軸方向）における寸法、および、その突出方向と直交する方向（Ｙ軸方向）における寸法が略同じもとされている。そして、複数の光学シート５３０は、第１突出部５３２Ａ、第２突出部５３２Ｂ、及び第３突出部５３２Ｃが、互いに離間して、この順に並んで配される構成とされている。 The plurality of optical sheets 530 are disposed at positions where the second protrusions 532B are displaced along the outer peripheral portion 30d (along the Y-axis direction) with respect to the first protrusions 532A. 532A and the second protrusion 532B are stacked on each other so as not to overlap. Further, the plurality of optical sheets 530 are disposed at positions where the third protrusions 532C are displaced along the outer peripheral portion 30d (along the Y-axis direction) with respect to the first protrusions 532A and the second protrusions 532B. Thus, the first protrusion 532A, the second protrusion 532B, and the third protrusion 532C are stacked so as not to overlap each other. The first protrusion 532A, the second protrusion 532B, and the third protrusion 532C have substantially the same dimensions in the protrusion direction (X-axis direction) and in the direction orthogonal to the protrusion direction (Y-axis direction). It has been done. The plurality of optical sheets 530 are configured such that the first projecting portion 532A, the second projecting portion 532B, and the third projecting portion 532C are spaced apart from each other and arranged in this order.
　第１の光学シート５３０Ａは、第２突出部５３２Ｂ及び第３突出部５３２Ｃと同様の形状をなし、これらと重なる嵩上げ突出部５３５Ａ，５３５Ａを有している。また、第２の光学シート５３０Ｂは、第３突出部５３２Ｃと同様の形状をなし、これと重なる嵩上げ突出部５３５Ｂを有している。このような構成によれば、第１の光学シート５３０Ａが３つの突出部（第１突出部５３２Ａ及び嵩上げ突出部５３５Ａ，５３５Ａ）を有し、第２の光学シート５３０Ｂが２つ突出部（第２突出部５３２Ｂ及び嵩上げ突出部５３５Ｂ）し、第３の光学シート５３０Ｃが１つ突出部（第３突出部５３２Ｃ）を有するから、互いの光学シート５３０を区別し易く、各光学シート５３０を間違えて配置することを抑制することができる。 The first optical sheet 530A has the same shape as the second projecting portion 532B and the third projecting portion 532C, and has raised projecting portions 535A and 535A that overlap these. Further, the second optical sheet 530B has the same shape as the third protrusion 532C and has a raised protrusion 535B that overlaps with the third protrusion 532C. According to such a configuration, the first optical sheet 530A has three protrusions (the first protrusion 532A and the raised protrusions 535A and 535A), and the second optical sheet 530B has two protrusions (first 2 protrusions 532B and raised protrusions 535B), and the third optical sheet 530C has one protrusion (third protrusion 532C), so that the optical sheets 530 can be easily distinguished from each other, and each optical sheet 530 is mistaken. Can be suppressed.
　第１溝部５４５、第２溝部５４５、第３溝部５４５は、Ｚ軸方向において、それぞれのシート支持部４２側の面がシート支持面４２ａと面一状をなしている。そして、第１溝部５４５Ａが第１突出部５３２Ａを、第２溝部５４５Ｂが第２突出部及び嵩上げ突出部５３５Ａを、第３溝部５４５Ｃが第３突出部及び嵩上げ突出部５３５Ａ，５３５Ｂをそれぞれ収容可能な構成とされている。 The surfaces of the first groove portion 545, the second groove portion 545, and the third groove portion 545 are flush with the sheet support surface 42a in the Z-axis direction. The first groove 545A can accommodate the first protrusion 532A, the second groove 545B can accommodate the second protrusion and the raised protrusion 535A, and the third groove 545C can accommodate the third protrusion and the raised protrusions 535A and 535B. It is made into the composition.
　＜実施形態４＞
　本発明の実施形態４を図１８によって説明する。この実施形態４では、実施形態１のシート押さえ面４６及び突出部３２の配設数を変更した液晶表示装置６１０を示す。なお、上記した実施形態と同様の構造、作用及び効果について重複する説明は省略する。 <Embodiment 4>
A fourth embodiment of the present invention will be described with reference to FIG. In the fourth embodiment, a liquid crystal display device 610 in which the number of the sheet pressing surfaces 46 and the protrusions 32 of the first embodiment is changed is shown. In addition, the description which overlaps about the structure, an effect | action, and effect similar to above-described embodiment is abbreviate | omitted.
　シート押さえ面６４６（第１シート押さえ面６４６Ａ、第２シート押さえ面６４６Ｂ、及び第３シート押さえ面６４６Ｃ）は、それぞれ複数（本実施形態ではそれぞれ２つ）形成されている。そして、シート押さえ面６４６，６４６は、複数の光学シート３０の一辺３１ａ側と対向辺３１ｂ側にそれぞれ配されている。一方、突出部６３２（第１突出部６３２Ａ、第２突出部６３２Ｂ、及び第３突出部６３２Ｃ）は、シート押さえ面６４６の位置に対応して、一辺３１ａと対向辺３１ｂにそれぞれ配されている。 Each of the sheet pressing surfaces 646 (the first sheet pressing surface 646A, the second sheet pressing surface 646B, and the third sheet pressing surface 646C) is formed in plural (two in the present embodiment). The sheet pressing surfaces 646 and 646 are respectively disposed on the one side 31a side and the opposite side 31b side of the plurality of optical sheets 30. On the other hand, the protruding portions 632 (the first protruding portion 632A, the second protruding portion 632B, and the third protruding portion 632C) are arranged on the one side 31a and the opposite side 31b, respectively, corresponding to the position of the sheet pressing surface 646. .
　本実施形態では、第１の光学シート３０Ａ及び第２の光学シート３０Ｂを複数の箇所で押さえることができ、好適に、第１の光学シート３０Ａ及び第２の光学シート３０Ｂが動くことを規制することができる。また、本実施形態では、第１の光学シート３０Ａ及び第２の光学シート３０Ｂの複数の辺３１ａ，３１ｂをそれぞれ押さえることができ、好適に、第１の光学シート３０Ａ及び第２の光学シート３０Ｂが動くことを規制することができる。 In the present embodiment, the first optical sheet 30A and the second optical sheet 30B can be pressed at a plurality of locations, and preferably the first optical sheet 30A and the second optical sheet 30B are restricted from moving. be able to. In the present embodiment, the plurality of sides 31a and 31b of the first optical sheet 30A and the second optical sheet 30B can be pressed, respectively, and preferably the first optical sheet 30A and the second optical sheet 30B. Can be controlled.
　［実施形態４の変形例１］
　本発明の実施形態４の変形例１を図１９によって説明する。この変形例１では、シート押さえ面４６及び突出部３２の配設態様を変更した液晶表示装置７１０を示す。 [Modification 1 of Embodiment 4]
A first modification of the fourth embodiment of the present invention will be described with reference to FIG. In the first modification, a liquid crystal display device 710 in which the arrangement form of the sheet pressing surface 46 and the protruding portion 32 is changed is shown.
　シート押さえ面７４６，７４６は、複数の光学シート３０の一の辺３１ｃに沿って、並んで配されている。一方、突出部７３２（第１突出部７３２Ａ、第２突出部７３２Ｂ、及び第３突出部７３２Ｃ）は、シート押さえ面７４６，７４６の位置に対応して、一の辺３１ｃに沿って、並んでそれぞれ配されている。このような構成によれば、第１の光学シート３０Ａ及び第２の光学シート３０Ｂの一の辺３１ｃを複数の箇所で押さえることができ、より大型の液晶表示装置等においても、好適に、第１の光学シート３０Ａ及び第２の光学シート３０Ｂが動くことを規制することができる。 The sheet pressing surfaces 746 and 746 are arranged side by side along one side 31c of the plurality of optical sheets 30. On the other hand, the protrusions 732 (the first protrusion 732A, the second protrusion 732B, and the third protrusion 732C) are aligned along the one side 31c corresponding to the positions of the sheet pressing surfaces 746, 746. Each is arranged. According to such a configuration, one side 31c of the first optical sheet 30A and the second optical sheet 30B can be pressed at a plurality of locations, and even in a larger liquid crystal display device or the like, The movement of the first optical sheet 30A and the second optical sheet 30B can be restricted.
　＜他の実施形態＞
　本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
　（１）上記した各実施形態では、第１の光学シートと、第２の光学シートと、第３の光学シートを備える液晶表示装置を例示したが、これに限られない。例えば、液晶表示装置は、第３の光学シートを備えていないものであってもよく、また、さらに多くの光学シート（第４の光学シート等）を備えるものであってもよい。 <Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In each of the above-described embodiments, the liquid crystal display device including the first optical sheet, the second optical sheet, and the third optical sheet is exemplified, but the present invention is not limited thereto. For example, the liquid crystal display device may not include the third optical sheet, or may include more optical sheets (fourth optical sheet or the like).
　（２）上記した各実施形態では、フレームがパネル支持部とシート支持面との間に４枚の光学シートを配置可能なシート収容空間を有する構成を例示したが、シート収容空間の構成はこれに限られない。シート収容空間は、パネル支持部とシート支持面との間に少なくとも２枚以上の光学シートを配置可能なものであればよい。 (2) In each of the above-described embodiments, the configuration in which the frame has a sheet storage space in which four optical sheets can be arranged between the panel support portion and the sheet support surface has been exemplified. Not limited to. The sheet accommodating space only needs to be capable of disposing at least two optical sheets between the panel support portion and the sheet support surface.
　（３）上記した各実施形態では、第１の光学シート（第２の光学シート）の第１突出部（第２突出部）が第１シート押さえ面（第２シート押さえ面）に押さえられる構成を例示したが、これに限られない。例えば、第１の光学シート（第２の光学シート）は第１突出部（第２突出部）を有しない構成であってもよく、その場合には、第１の光学シート（第２の光学シート）の外周部分が第１シート押さえ面（第２シート押さえ面）に押さえられる構成であってもよい。 (3) In each of the embodiments described above, the first protrusion (second protrusion) of the first optical sheet (second optical sheet) is pressed against the first sheet pressing surface (second sheet pressing surface). However, the present invention is not limited to this. For example, the first optical sheet (second optical sheet) may not have the first protrusion (second protrusion), and in that case, the first optical sheet (second optical sheet) may be used. The outer periphery of the sheet may be configured to be pressed by the first sheet pressing surface (second sheet pressing surface).
　（４）上記した各実施形態では、第１シート押さえ面（第２シート押さえ面）が、側壁部に設けられた溝部の内面とされる構成を例示したが、これに限られない。例えば、第１シート押さえ面（第２シート押さえ面）は、パネル支持部における裏面（シート支持面と対向する面）から突出する形をなす突出部分の突出端面とされてもよい。 (4) In each of the above-described embodiments, the configuration in which the first sheet pressing surface (second sheet pressing surface) is the inner surface of the groove portion provided in the side wall portion is illustrated, but is not limited thereto. For example, the first sheet pressing surface (second sheet pressing surface) may be a protruding end surface of a protruding portion that protrudes from the back surface (the surface facing the sheet supporting surface) of the panel support portion.
　（５）上記した実施形態４では、シート押さえ面及び突出部が、長方形状をなす光学部材の一対の短辺側に配置されるものを開示したが、シート押さえ面及び突出部の配置はこれに限られない。例えば、シート押さえ面及び突出部が、長方形状をなす光学部材の一対の長辺側に配置されてもよく、また、４つの辺にそれぞれ配置されてもよい。 (5) In the above-described fourth embodiment, the sheet pressing surface and the protruding portion are disposed on the pair of short sides of the rectangular optical member. However, the arrangement of the sheet pressing surface and the protruding portion is this. Not limited to. For example, the sheet pressing surface and the protruding portion may be disposed on the pair of long sides of the rectangular optical member, or may be disposed on each of the four sides.
　（６）上記した実施形態４の変形例１では、シート押さえ面及び突出部が、長方形状をなす光学部材の長辺に沿って、並んで配置されるものを開示したが、シート押さえ面及び突出部の配置はこれに限られない。例えば、シート押さえ面及び突出部が、長方形状をなす光学部材の短辺に沿って、並んで配置されてもよい。 (6) In the first modification of the fourth embodiment described above, the sheet pressing surface and the protrusion are disclosed to be arranged side by side along the long side of the rectangular optical member. The arrangement of the protrusions is not limited to this. For example, the sheet pressing surface and the protruding portion may be arranged side by side along the short side of the rectangular optical member.
　（７）上記した各実施形態以外にも、光学シートの形状、配置、及び配設枚数は適宜変更可能である。 (7) Besides the above-described embodiments, the shape, arrangement, and number of arrangement of the optical sheet can be changed as appropriate.
　（８）上記した各実施形態以外にも、シート押さえ面の形状、配置、及び配設数は適宜変更可能である。 (8) In addition to the above-described embodiments, the shape, arrangement, and number of arrangement of the sheet pressing surface can be changed as appropriate.
　（９）上記した各実施形態以外にも、パネル支持部、シート支持面（シート支持部）、側壁部の形状は適宜変更可能である。例えば、上記した各実施形態では、シート支持面が側壁部から突出する形をなすシート支持部の一の面として形成されるものを例示したが、シート支持面は、側壁部が段付き状とされることで形成されるものであってもよい。 (9) Besides the above-described embodiments, the shapes of the panel support part, the sheet support surface (sheet support part), and the side wall part can be changed as appropriate. For example, in each of the above-described embodiments, the sheet support surface is exemplified as one surface of the sheet support portion that protrudes from the side wall portion, but the sheet support surface has a stepped side wall portion. May be formed.
　（１０）上記した実施形態２，３に記載した構成に実施形態４に記載した構成を適用することも可能である。また、上記した実施形態４に記載した構成と、実施形態４の変形例１に記載した構成と、を組み合わせて適用することも可能である。 (10) The configuration described in the fourth embodiment can be applied to the configuration described in the second and third embodiments. In addition, the configuration described in the above-described fourth embodiment and the configuration described in the first modification of the fourth embodiment can be applied in combination.
　（１１）上記した各実施形態では、ＬＥＤ基板を導光板における長辺側の一端面に対して対向状に配したものを示したが、ＬＥＤ基板を導光板における短辺側の一端面に対して対向状に配したものも本発明に含まれる。 (11) In each of the above-described embodiments, the LED substrate is disposed so as to face the one end surface on the long side of the light guide plate. However, the LED substrate is disposed on the one end surface on the short side of the light guide plate. In addition, those arranged in an opposing manner are also included in the present invention.
　（１２）上記した（１１）以外にも、ＬＥＤ基板を導光板における長辺側の一対の端面に対して対向状に配したものや、ＬＥＤ基板を導光板における短辺側の一対の端面に対して対向状に配したものも本発明に含まれる。 (12) In addition to the above (11), the LED substrate is disposed opposite to the pair of end surfaces on the long side of the light guide plate, or the LED substrate is disposed on the pair of end surfaces on the short side of the light guide plate. Those arranged opposite to each other are also included in the present invention.
　（１３）上記した（１１），（１２）以外にも、ＬＥＤ基板を導光板における任意の３つの端面に対して対向状に配したものや、ＬＥＤ基板を導光板の４つの端面全てに対して対向状に配したものも本発明に含まれる。 (13) In addition to the above (11) and (12), the LED substrate is arranged opposite to any three end surfaces of the light guide plate, or the LED substrate is attached to all four end surfaces of the light guide plate. In addition, those arranged in an opposing manner are also included in the present invention.
　（１４）上記した各実施形態では、光源としてＬＥＤを用いたものを示したが、他の光源を用いることも可能である。 (14) In the above-described embodiments, the LED is used as the light source, but other light sources may be used.
　（１５）上記した各実施形態では、液晶表示装置が備えるバックライト装置としてエッジライト型のものを例示したが、直下型のバックライト装置を用いるようにしたものも本発明に含まれる。 (15) In each of the above-described embodiments, the edge light type is exemplified as the backlight device included in the liquid crystal display device, but the present invention includes a backlight device of a direct type.
　（１６）上記した各実施形態では、表示パネルを備える表示装置にフレームを適用したものを例示したが、表示パネルを備えないバックライト装置（照明装置）に各実施形態に記載したフレームを適用した場合であっても、同様の作用・効果を奏するものとすることができる。 (16) In each of the above embodiments, the frame is applied to a display device including a display panel. However, the frame described in each embodiment is applied to a backlight device (illumination device) that does not include a display panel. Even if it is a case, there can exist the same effect | action and effect.
　（１７）上記した各実施形態では、液晶パネルが方形状をなす液晶表示装置を例示したが、液晶パネルの形状はこれに限られない。 (17) In each of the above-described embodiments, the liquid crystal display device in which the liquid crystal panel has a square shape is illustrated, but the shape of the liquid crystal panel is not limited thereto.
　（１８）上記した各実施形態では、液晶表示装置のスイッチング素子としてＴＦＴを用いたが、ＴＦＴ以外のスイッチング素子（例えば薄膜ダイオード（ＴＦＤ））を用いた液晶表示装置にも適用可能であり、カラー表示する液晶表示装置以外にも、白黒表示する液晶表示装置にも適用可能である。 (18) In each of the embodiments described above, the TFT is used as the switching element of the liquid crystal display device. However, the present invention can also be applied to a liquid crystal display device using a switching element other than TFT (for example, a thin film diode (TFD)). In addition to the liquid crystal display device for display, the present invention can also be applied to a liquid crystal display device for monochrome display.
　（１９）上記した各実施形態では、表示パネルとして液晶パネルを用いた液晶表示装置を例示したが、他の種類の表示パネルを用いた表示装置にも本発明は適用可能である。 (19) In each of the above-described embodiments, the liquid crystal display device using the liquid crystal panel as the display panel is exemplified, but the present invention can be applied to a display device using another type of display panel.
　１０，１１０，２１０，３１０，４１０，５１０，６１０，７１０...液晶表示装置（表示装置）、１１...液晶パネル（表示パネル）、１１ｄ...外周部分、２１...ＬＥＤ（光源）、３０，３３０，４３０，５３０...光学シート（光学部材）、３０Ａ，３３０Ａ，４３０Ａ，５３０Ａ...第１の光学シート（第１の光学部材）、３０Ｂ，３３０Ｂ，４３０Ｂ，５３０Ｂ...第２の光学シート（第２の光学部材）、３２Ａ，３３２Ａ，４３２Ａ，５３２Ａ，６３２Ａ，７３２Ａ...第１突出部、３２Ｂ，３３２Ｂ，４３２Ｂ，５３２Ｂ，６３２Ｂ，７３２Ｂ...第２突出部、３３Ａ...第１段面、３３Ｂ...第２段面、４０...フレーム、４１...パネル支持部、４２...シート支持部、４２ａ...シート支持面、４３...シート収容空間（光学部材収容空間）４４...側壁部、４５，１４５，２４５，３４５，４４５，５４５...溝部、４６Ａ，３４６Ａ，６４６Ａ，７４６Ａ...シート押さえ面、４６Ｂ，３４６Ｂ，６４６Ｂ，７４６Ｂ...シート押さえ面 10, 110, 210, 310, 410, 510, 610, 710 ... liquid crystal display device (display device), 11 ... liquid crystal panel (display panel), 11d ... outer periphery, 21 ... LED ( Light source), 30, 330, 430, 530 ... optical sheet (optical member), 30A, 330A, 430A, 530A ... first optical sheet (first optical member), 30B, 330B, 430B, 530B ... second optical sheet (second optical member), 32A, 332A, 432A, 532A, 632A, 732A ... first protrusion, 32B, 332B, 432B, 532B, 632B, 732B ... 2 protrusions, 33A ... first step surface, 33B ... second step surface, 40 ... frame, 41 ... panel support, 42 ... sheet support, 42a ... sheet support Surface, 43 ... sheet housing space (optical member housing space) 44 ... side Parts, 45,145,245,345,445,545 ... groove, 46A, 346A, 646A, 746A ... sheet holding surface, 46B, 346B, 646B, 746B ... sheet holding surface

Claims (11)

  1. 　光源と、
    　前記光源からの光を透過するとともに、透過する光に光学作用を付与するためのシート状をなした複数の光学部材であって、第１の光学部材と、前記第１の光学部材に対して積層する形で配される第２の光学部材と、を含んで構成される複数の光学部材と、
    　前記複数の光学部材に対して前記第２の光学部材側に配されるとともに、前記複数の光学部材を透過した光を利用して表示を行う表示パネルと、
    　前記複数の光学部材の外周部分及び前記表示パネルの外周部分に沿って延在するフレームであって、
    　　前記表示パネルを前記複数の光学部材側から支持するパネル支持部と、
    　　前記パネル支持部との間に少なくとも前記複数の光学部材を配置可能な光学部材収容空間を有する形で、前記複数の光学部材を前記表示パネル側とは反対側から支持するシート支持面と、
    　　前記第１の光学部材の前記表示パネル側の面と対向状をなし、前記第１の光学部材を前記表示パネル側から押さえる第１シート押さえ面と、
    　　前記シート支持面からの距離が前記第１シート押さえ面より大きいものとされるとともに、前記第２の光学部材の前記表示パネル側の面と対向状をなし、前記第２の光学部材を前記表示パネル側から押さえる第２シート押さえ面と、を有するフレームと、
    　を備える表示装置。     A light source;
    A plurality of optical members having a sheet shape for transmitting light from the light source and imparting an optical action to the transmitted light, the first optical member and the first optical member A plurality of optical members configured to include a second optical member arranged in a stacked manner;
    A display panel that is arranged on the second optical member side with respect to the plurality of optical members and performs display using light transmitted through the plurality of optical members;
    A frame extending along an outer peripheral portion of the plurality of optical members and an outer peripheral portion of the display panel,
    A panel support portion for supporting the display panel from the plurality of optical member sides;
    A sheet support surface for supporting the plurality of optical members from the side opposite to the display panel in a form having an optical member housing space in which at least the plurality of optical members can be disposed between the panel support portions;
    A first sheet pressing surface configured to face the display panel side surface of the first optical member, pressing the first optical member from the display panel side;
    The distance from the sheet support surface is greater than the first sheet pressing surface, and is opposed to the surface of the second optical member on the display panel side, and the second optical member is displayed on the display. A frame having a second sheet pressing surface pressed from the panel side;
    A display device comprising:
  2. 　前記第１の光学部材には、前記外周部分から外方に向けて突出する形で前記第１シート押さえ面に押さえられる第１突出部が形成され、
    　前記第２の光学部材には、前記外周部分から外方に向けて突出する形で前記第２シート押さえ面に押さえられる第２突出部が形成されている請求項１に記載の表示装置。     The first optical member is formed with a first projecting portion that is pressed against the first sheet pressing surface so as to protrude outward from the outer peripheral portion,
    The display device according to claim 1, wherein the second optical member is formed with a second projecting portion that is pressed against the second sheet pressing surface so as to protrude outward from the outer peripheral portion.
  3. 　前記フレームは、前記複数の光学部材を囲む形をなす側壁部を更に有し、
    　前記側壁部には、前記第１突出部及び前記第２突出部を収容する溝部が形成され、
    　前記第１シート押さえ面及び前記第２シート押さえ面は、前記溝部の内面のうち前記パネル支持部側に位置する面とされている請求項２に記載の表示装置。     The frame further includes a side wall portion that surrounds the plurality of optical members,
    The side wall is formed with a groove that accommodates the first protrusion and the second protrusion,
    The display device according to claim 2, wherein the first sheet pressing surface and the second sheet pressing surface are surfaces positioned on the panel support portion side of the inner surface of the groove portion.
  4. 　前記複数の光学部材は、前記第１突出部で少なくとも構成される第１段面と、前記第１段面に前記第２突出部が重なることで少なくとも構成される第２段面とが、段差状をなすようにして互いに積層され、
    　前記溝部の内面は、前記第１シート押さえ面と前記第２シート押さえ面とが、前記第１段面と前記第２段面とにそれぞれ倣う形で段差状をなして形成されている請求項３に記載の表示装置。     The plurality of optical members have a step difference between a first step surface constituted by at least the first protrusion and a second step surface constituted by at least the second protrusion overlapping the first step surface. Are stacked on top of each other,
    The inner surface of the groove is formed in a stepped shape so that the first sheet pressing surface and the second sheet pressing surface respectively follow the first step surface and the second step surface. 3. The display device according to 3.
  5. 　前記複数の光学部材は、前記第１突出部の突出方向と直交する方向における寸法が前記第２突出部の突出方向と直交する方向における寸法より大きいものとされることで、段差状をなす構成とされている請求項４に記載の表示装置。 The plurality of optical members have a stepped shape in which the dimension in the direction orthogonal to the protruding direction of the first protruding part is larger than the dimension in the direction orthogonal to the protruding direction of the second protruding part. The display device according to claim 4.
  6. 　前記複数の光学部材は、前記第１突出部の突出方向における寸法が前記第２突出部の突出方向における寸法より大きいものとされることで、段差状をなす構成とされている請求項４に記載の表示装置。 5. The plurality of optical members are configured to have a stepped shape by having a dimension in the projecting direction of the first projecting part larger than a dimension in the projecting direction of the second projecting part. The display device described.
  7. 　前記複数の光学部材は、前記第１突出部に対して前記第２突出部が前記外周部分に沿ってずれた位置に配設されることで、前記第１突出部と前記第２突出部が重ならないようにして互いに積層され、
    　前記溝部は、前記第１突出部を収容するとともに前記第１シート押さえ面を有する第１溝部と、前記第２突出部を収容するとともに前記第２シート押さえ面を有する第２溝部とが、互いに独立した内部空間を形成する構成とされている請求項３に記載の表示装置。     The plurality of optical members are disposed at positions where the second protrusion is displaced along the outer peripheral portion with respect to the first protrusion, so that the first protrusion and the second protrusion are They are stacked together so that they do not overlap,
    The groove portion receives the first protrusion and has the first sheet pressing surface, and the second groove portion stores the second protrusion and has the second sheet pressing surface. The display device according to claim 3, wherein the display device is configured to form an independent internal space.
  8. 　前記第１シート押さえ面及び前記第２シート押さえ面は、それぞれ複数形成されている請求項１から請求項７のいずれか１項に記載の表示装置。 The display device according to any one of claims 1 to 7, wherein a plurality of the first sheet pressing surface and the second sheet pressing surface are formed.
  9. 　前記複数の光学部材は、方形状をなし、
    　複数の前記第１シート押さえ面及び前記第２シート押さえ面は、前記複数の光学部材の複数の辺側にそれぞれ配されている請求項８に記載の表示装置。     The plurality of optical members have a rectangular shape,
    The display device according to claim 8, wherein the plurality of first sheet pressing surfaces and the second sheet pressing surface are respectively disposed on a plurality of sides of the plurality of optical members.
  10. 　前記複数の光学部材は、方形状をなし、
    　複数の前記第１シート押さえ面及び前記第２シート押さえ面は、前記複数の光学部材の一の辺に沿って、並んで配されている請求項８または請求項９に記載の表示装置。     The plurality of optical members have a rectangular shape,
    The display device according to claim 8 or 9, wherein the plurality of first sheet pressing surfaces and the second sheet pressing surface are arranged side by side along one side of the plurality of optical members.
  11. 　前記表示パネルは、一対の基板間に液晶を封入してなる液晶パネルとされる請求項１から請求項１０のいずれか１項に記載の表示装置。 The display device according to any one of claims 1 to 10, wherein the display panel is a liquid crystal panel in which liquid crystal is sealed between a pair of substrates.
PCT/JP2016/061654 2015-04-17 2016-04-11 Display device WO2016167207A1 (en)

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Cited By (1)

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TWI825989B (en) * 2022-03-04 2023-12-11 群創光電股份有限公司 Electronic device

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CN104049402A (en) * 2014-04-16 2014-09-17 友达光电股份有限公司 Display module
CN104089216A (en) * 2014-06-05 2014-10-08 京东方科技集团股份有限公司 Backlight source and display device

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CN104049402A (en) * 2014-04-16 2014-09-17 友达光电股份有限公司 Display module
CN104089216A (en) * 2014-06-05 2014-10-08 京东方科技集团股份有限公司 Backlight source and display device

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Publication number Priority date Publication date Assignee Title
TWI825989B (en) * 2022-03-04 2023-12-11 群創光電股份有限公司 Electronic device

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