WO2015068729A1 - Illumination device and display device - Google Patents

Illumination device and display device Download PDF

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Publication number
WO2015068729A1
WO2015068729A1 PCT/JP2014/079342 JP2014079342W WO2015068729A1 WO 2015068729 A1 WO2015068729 A1 WO 2015068729A1 JP 2014079342 W JP2014079342 W JP 2014079342W WO 2015068729 A1 WO2015068729 A1 WO 2015068729A1
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WO
WIPO (PCT)
Prior art keywords
supported
pieces
optical sheets
adhesive tape
guide plate
Prior art date
Application number
PCT/JP2014/079342
Other languages
French (fr)
Japanese (ja)
Inventor
伸一 植松
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 WO2015068729A1 publication Critical patent/WO2015068729A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/46—Fixing elements

Definitions

  • the present invention relates to an illumination device and a display device including a plurality of optical sheets and a support member that supports them.
  • the liquid crystal display device includes a liquid crystal display panel that displays an image, and a backlight unit that illuminates the liquid crystal display panel from the back side of the liquid crystal display panel.
  • a backlight unit that illuminates the liquid crystal display panel from the back side of the liquid crystal display panel.
  • an edge light type backlight unit has been proposed (see Patent Document 1).
  • the edge light type backlight unit includes a light guide plate disposed on the back side of the liquid crystal display panel via an optical sheet group, and a light source unit disposed opposite the end surface of the light guide plate.
  • the optical sheet group is formed by laminating a plurality of optical sheets each having a light diffusing function or a light collecting function.
  • the optical sheet group is supported by a lower case that houses a light guide plate.
  • a rectangular protrusion is provided at the peripheral edge of each of the three optical sheets (“diffusion sheet” and “prism sheet” in the text), and each protrusion has a circular through-hole. Is formed.
  • the lower case is provided with a columnar columnar member protruding to the front side.
  • each optical sheet is positioned with respect to the lower case and supported by the lower case.
  • the inner diameter of the through hole in the protruding portion of the optical sheet is equal to or greater than the outer diameter of the columnar member of the lower case. Accordingly, a gap may be generated between the peripheral surface of the columnar member and the inner surface of the through hole. As a result, each optical sheet may vibrate slightly with the vibration of the liquid crystal display device. At this time, the optical sheets or the optical sheet and the light guide plate are rubbed together, and the surface of the optical sheet or the light guide plate may be damaged. In order to suppress the vibration of the optical sheet, it is conceivable to stick the protruding portion of each optical sheet to the lower case using an adhesive tape. However, the work of sticking the protruding portions of the three optical sheets one by one to the lower case is complicated.
  • the present invention has been made in view of such circumstances, and a main object thereof is to provide an illumination device and a display device that can suppress damage to the optical sheet or the light guide plate due to vibration of the optical sheet. is there.
  • An illumination device includes a light guide plate that emits light emitted from a light source unit from one surface, and N (N is a plurality) optical sheets that are stacked on the one surface side of the light guide plate, And a support member for supporting the N optical sheets, wherein the supported pieces have respective areas sequentially reduced in the stacking direction at positions corresponding to each other at the peripheral edge of each of the N optical sheets. And an adhesive tape for affixing the N supported pieces of the N optical sheets corresponding to each other to the support member.
  • An illumination device includes a light guide plate that emits light emitted from a light source unit from one surface, and N (N is a plurality) optical sheets that are stacked on the one surface side of the light guide plate, And a support member for supporting the N optical sheets, wherein the supported pieces have their respective areas sequentially increased in the stacking direction at positions corresponding to each other at the peripheral edge of each of the N optical sheets. And an adhesive tape for affixing the N supported pieces of the N optical sheets corresponding to each other to the support member.
  • the support member is arranged on one side of the stacking direction with respect to the N supported pieces, and the N supported pieces are closer to the support member.
  • the adhesive tape has a large area, and the N pieces to be supported are attached to the support member from the other side in the stacking direction.
  • the illumination device according to the present invention is characterized in that the N pieces to be supported are longer in the peripheral direction of the optical sheet as the supported piece has a larger area.
  • a through hole is formed at a corresponding position of each of the N supported pieces, and the support member is inserted into the through hole of the N supported pieces.
  • a positioning protrusion is provided.
  • a display device includes the illumination device according to the present invention and a display panel illuminated from the back side by the illumination device.
  • a television receiver includes the display device according to the present invention and a receiving unit that receives a television broadcast, and an image is displayed on the display device based on the television broadcast received by the receiving unit. It is characterized by being displayed.
  • the supported piece on one side in the stacking direction has a larger area than the supported piece on the other side in the stacking direction. For this reason, if an adhesive tape is arrange
  • FIG. 1 is a perspective view schematically showing a configuration of a television receiver including a display device according to Embodiment 1 of the present invention. It is a disassembled perspective view which briefly shows the structure of a television receiver. It is an expansion disassembled perspective view which shows the structure of a television receiver schematically. It is a front view which shows typically arrangement
  • FIG. 1 is a perspective view, an exploded perspective view, and an enlarged exploded perspective view schematically showing a configuration of a television receiver 1 including the display device 11 according to Embodiment 1 of the present invention.
  • . 4 and 5 are a front view and a horizontal cross-sectional view schematically showing the arrangement of the optical sheets 41, 42, and 43 provided in the backlight unit 23 as the illumination device according to Embodiment 1 of the present invention.
  • FIG. 5 is also a cross-sectional view taken along line IV-IV in FIG.
  • FIG. 6 is a schematic horizontal sectional view for explaining an assembly procedure of the backlight unit 23.
  • the television receiver 1 includes a display device 11, a receiving unit 12, a signal processing unit 13, a stand 14, a cabinet 15, and the like.
  • the display device 11 includes a first frame body 21, a display panel 22, a backlight unit 23, and a backlight chassis (hereinafter referred to as “BL chassis”) 24.
  • the backlight unit 23 includes an optical sheet group 31, a second frame 32, a light guide plate 33, a reflection sheet 34, supports 351 and 352, light source units 361 and 362, and heat sinks 371 and 372.
  • the television receiver 1 is a stationary type.
  • the display device 11 has a rectangular shape.
  • the display device 11 includes a receiving unit 12 and a signal processing unit 13 and is accommodated in the cabinet 15 with the display area of the display panel 22 exposed.
  • the stand 14 functions as a leg for mounting the display device 11 on a mounting table (for example, a so-called television table), and supports the display device 11 in a vertical posture.
  • the television receiver 1 is not limited to a stationary type, and may be a wall-mounted type, for example. In this case, the television receiver 1 does not have to include the stand 14.
  • the receiving unit 12 and the signal processing unit 13 may be outside the display device 11.
  • the display panel 22 is a liquid crystal display panel.
  • the display panel 22 has a rectangular shape and is arranged in a vertical posture.
  • the display panel 22 has a rectangular display area and a rectangular frame-shaped frame area surrounding the display area.
  • the display panel 22 includes a front glass substrate and a rear glass substrate. Liquid crystal is sealed between the two glass substrates. The transmittance of the display panel 22 changes according to the voltage applied to the liquid crystal of the display panel 22.
  • the first frame body 21 and the second frame body 32 are each rectangular.
  • the first frame body 21 has an upper frame portion 211 and a lower frame portion 212 corresponding to the upper and lower sides, the left side and the right side of the display panel 22, and a left frame portion 213 and a right frame.
  • the second frame 32 includes upper frame portions (support members) 321 and lower bars corresponding to the upper frame portion 211 and the lower frame portion 212, the left frame portion 213, and the right frame portion 214 of the first frame body 21, respectively. It has the frame part 322, the left frame part 323, and the right frame part 324 of each vertical bar shape.
  • the lengths of the openings of the first frame 21 (or the second frame 32) in the vertical direction and the horizontal direction (hereinafter referred to as vertical and horizontal lengths) are approximately the same as the vertical and horizontal lengths of the display area of the display panel 22.
  • the upper frame portion 321 of the second frame body 32 is made of an angle material, and has a front surface portion 32a in a vertical posture and an upper surface portion 32b in a horizontal posture.
  • the upper end portion of the front surface portion 32a and the front end portion of the upper surface portion 32b are integrally connected.
  • the front frame portion 32a of the upper frame portion 321 is provided with M positioning projections 325 having a rectangular shape in front view (only two are shown in FIG. 3 and one is shown in FIGS. 4 to 6).
  • the M positioning projections 325, 325,... Are equally arranged in the left-right direction from the left end portion to the right end portion of the front surface portion 32a.
  • the optical sheet group 31 is formed by stacking N optical sheets 41, 42,.
  • the optical sheets 43, 42, and 41 are stacked in this order from the back side to the front side. That is, the stacking direction of the optical sheets 41, 42, 43 is a direction from the back side to the front side.
  • the optical sheet 41 is a synthetic resin sheet having a polarization function, for example.
  • the optical sheet 41 integrally includes a rectangular sheet body 411 and M supported pieces 412, 412,.
  • the vertical and horizontal lengths of the sheet main body 411 are longer than the vertical and horizontal lengths of the opening of the second frame body 32. Further, the length in the left-right direction of the sheet main body 411 (hereinafter referred to as the horizontal length) is approximately the same as the horizontal length of the front surface portion 32 a of the upper frame portion 321 related to the second frame body 32.
  • Each supported piece 412 is flush with the sheet body 411 and protrudes from the upper side (periphery) of the sheet body 411.
  • a rectangular through hole 413 is formed at the center of the supported piece 412 in the vertical and horizontal directions.
  • the length of the supported piece 412 in the vertical direction (hereinafter referred to as the vertical length) is approximately the same as the vertical length of the front surface portion 32 a of the upper frame portion 321 related to the second frame body 32.
  • M pieces of supported pieces 412, 412,... are equally arranged in the left-right direction from the left end portion to the right end portion of the upper side portion of the sheet main body 411.
  • the left four have the same shape (specifically, rectangular shape), but the rightmost one has a shape (specifically, different from the other four). Is a shape in which one corner of the rectangle is cut out). For this reason, if the arrangement positions and shapes of the supported pieces 412, 412,... Are used as clues, the operator can easily determine the top, bottom, left, and right of the optical sheet 41.
  • the optical sheet 42 is, for example, a synthetic resin sheet having a light condensing function
  • the optical sheet 43 is, for example, a synthetic resin sheet having a light diffusion function.
  • the shape of each of the optical sheets 42 and 43 is substantially the same as the shape of the optical sheet 41. That is, the optical sheet 42 integrally includes a sheet main body 421 and M supported pieces 422, 422,..., And the optical sheet 43 includes a sheet main body 431 and M supported pieces 432, 432,. Are integrated. Each supported piece 422 has a through hole 423, and each supported piece 432 has a through hole 433.
  • the M pieces of supported pieces 412, 412, ..., the supported pieces 422, 422, ... and the supported pieces 432, 432, ... of the optical sheets 41, 42, 43 correspond to each other (specifically, The same position in the vertical and horizontal directions). Therefore, the M through holes 413, 413,..., The through holes 423, 423,... And the through holes 433, 433, etc. of the optical sheets 41, 42, 43 are arranged at positions corresponding to each other.
  • the vertical and horizontal lengths of the through holes 413, 423 and 433 are longer than the vertical and horizontal lengths of the positioning protrusions 325.
  • the supported piece 422 of the optical sheet 42 has a larger area than the supported piece 412 of the optical sheet 41, and the supported piece 432 of the optical sheet 43 has a larger area than the supported piece 422 of the optical sheet 42.
  • the lateral length of the supported piece 422 is longer than the lateral length of the supported piece 412
  • the lateral length of the supported piece 432 is longer than the lateral length of the supported piece 422 (for example, the supported piece 412. , 422, 432 in the order of 30 mm, 40 mm, and 50 mm).
  • the longitudinal lengths of the supported pieces 412, 422, and 432 are equal (for example, 9.5 mm).
  • the areas of the N supported pieces 412, 422, 432 corresponding to each other are sequentially reduced in the stacking direction. In other words, the area stacked on the back side is larger. Further, the N supported pieces 412, 422, and 432 have a longer lateral length (that is, a length in the peripheral direction of each of the optical sheets 41, 42, and 43) as the area is larger.
  • the sum of the thicknesses of the supported pieces 412, 422, 432 (that is, the thickness of the stacked body of the supported pieces 412, 422, 432) is the amount of protrusion of the positioning protrusion 325 from the upper frame portion 321 of the second frame body 32. Smaller than.
  • the light guide plate 33 has a rectangular plate shape.
  • the light guide plate 33 is made of, for example, acrylic resin.
  • the vertical and horizontal lengths of the light guide plate 33 are longer than the vertical and horizontal lengths of the openings of the second frame body 32.
  • the light guide plate 33 causes the light incident on the light guide plate 33 to be emitted from the front surface of the light guide plate 33. However, part of the light incident on the inside of the light guide plate 33 may be transmitted through the rear surface of the light guide plate 33 (that is, light leakage occurs).
  • the reflection sheet 34 has a rectangular shape. The vertical and horizontal lengths of the reflection sheet 34 are longer than the vertical and horizontal lengths of the light guide plate 33.
  • the supports 351 and 352 are in the form of horizontal bars. The lengths of the supports 351 and 352 are approximately the same as the lateral length of the reflection sheet 34.
  • the light source unit 361 includes a rectangular LED board elongated in the left-right direction arranged in a horizontal posture, and a plurality of LEDs equally mounted in a line in the left-right direction on the lower surface of the LED board. The lateral length of the light source unit 361 is approximately the same as the lateral length of the light guide plate 33.
  • the light source unit 362 has substantially the same configuration as the light source unit 361, but a plurality of LEDs are mounted on the upper surface of the LED substrate.
  • Each of the heat sinks 371 and 372 is made of an angle material arranged in a horizontal posture.
  • the horizontal lengths of the heat sinks 371 and 372 are approximately the same as the horizontal lengths of the light source units 361 and 362, respectively. Heat generated by the light source units 361 and 362 is discharged to the outside of the television receiver 1 through the heat sinks 371 and 372.
  • the BL chassis 24 is a rectangular tray-shaped container.
  • the BL chassis 24 has a rectangular wall portion 241 in front view corresponding to the bottom surface of the plate and a peripheral surface portion corresponding to the peripheral surface of the plate.
  • Each of the reinforcing members 242 and 243 is a bar member in a vertical posture.
  • the receiving unit 12 is a circuit board on which a not-shown receiving circuit is mounted.
  • the receiving circuit receives a television broadcast from the outside via an antenna (not shown).
  • the signal processing unit 13 is a circuit board on which a signal processing circuit (not shown) is mounted.
  • the signal processing circuit outputs video data by performing predetermined signal processing on the television signal received by the receiving unit 12.
  • the stand 14 is provided with two left and right columnar portions 141 and 142 that are arranged in a vertical posture.
  • the positioning projections 325, 325,... Of the upper frame portion 321 of the second frame 32 are first formed in the through holes 433, 433,. .. Are inserted from the back side into the through holes 423, 423,... Of the supported pieces 422, 422,... Of the optical sheet 42, and then the supported pieces 412, 412,. Are inserted into the through holes 413, 413,. Then, each positioning protrusion 325 is loosely fitted in the through holes 413, 423, 433. The front end of the positioning protrusion 325 protrudes from the supported piece 412 of the optical sheet 41 to the front side (see FIG. 5).
  • each supported piece 412 covers the center part in the left-right direction of the supported piece 422, and the supported piece 422 covers the center part in the left-right direction of the supported piece 432. Therefore, the front surface of each supported piece 412 and the left and right end portions of the front surfaces of the supported pieces 422 and 432 are exposed without being covered by the other supported pieces 412, 422 and 432.
  • the stacked body of the supported pieces 412, 422, and 432 has a horizontally long staircase shape that increases from the left and right end portions toward the center in the left-right direction.
  • a gap is formed between the peripheral surface of each positioning protrusion 325 and the inner surfaces of the through holes 413, 423, and 433. Therefore, in this state, the optical sheets 41, 42, and 43 are in a state in which the optical sheets 41, 42, and 43 can be minutely vibrated in a posture suspended from the upper frame portion 321 of the second frame body 32. Therefore, M adhesive tapes 51, 51,... Are used to suppress minute vibrations of the optical sheets 41, 42, 43, respectively.
  • Each adhesive tape 51 has translucency and heat resistance.
  • the adhesive tape 51 is a rectangular single-sided tape that is long in the left-right direction.
  • the lateral length (that is, the length in the longitudinal direction) of the adhesive tape 51 is longer than the lateral length of the supported piece 432, for example, 65 mm.
  • the length of the adhesive tape 51 in the short direction is longer than the vertical length of each of the supported pieces 412, 422, and 432, and is, for example, 17 mm. This is because, as will be described later, the adhesive tape 51 is affixed in an L-shaped state bent at the center in the short direction.
  • the thickness of the adhesive tape 51 is sufficiently thin (for example, 0.2 mm).
  • the worker brings the adhesive surface of the adhesive tape 51 closer to the laminated body of the supported pieces 412, 422, 432 of the optical sheets 41, 42, 43 from the front side.
  • the operator presses the left and right direction center portion of the lower half of the adhesive tape 51 against the supported piece 412, and the left and right side portions of the left and right direction center portion are connected to the left and right end portions of the supported piece 422.
  • the left and right ends of 432 and the front surface 32a of the upper frame 321 associated with the second frame 32 are pressed in this order.
  • the operator also bends the adhesive tape 51 at the center in the vertical direction and presses the upper half of the adhesive tape 51 against the upper surface portion 32 b of the upper frame portion 321 related to the second frame body 32.
  • the laminated body of the supported pieces 412, 422, and 432 of the optical sheets 41, 42, and 43 is affixed together to the second frame body 32.
  • the optical sheets 41, 42, and 43 are fixed to the second frame 32, respectively. That is, the optical sheets 41, 42, and 43 are suppressed from being vibrated minutely.
  • the adhesive tape 51 may have non-light-transmitting property, the direction which has translucency has high workability
  • the number of adhesive tapes 51 may be one or more and M or less. For example, when the number of the adhesive tapes 51 is three, the operator can use one laminated body of supported pieces 412, 422, and 432 positioned at the center in the left-right direction and supported pieces 412 positioned at the left and right ends.
  • Each of the stacked bodies 422 and 432 may be attached to the upper frame portion 321 of the second frame body 32. Further, for example, when the number of the adhesive tapes 51 is one, the operator attaches one laminated body of the supported pieces 412, 422, and 432 located at the center in the left-right direction to the upper frame portion of the second frame 32. You may affix on 321.
  • the adhesive tape 51 is also bonded to the tip of the positioning protrusion 325. This is because the distal end portion of the positioning protrusion 325 protrudes from the supported piece 412 of the optical sheet 41 to the front side. Therefore, the adhesive tape 51 partially lifts from the supported piece 412. If the adhesion area between the adhesive surface of the adhesive tape 51 and the front surface of the supported piece 412 becomes insufficient due to this, for example, the operator forms a through hole in the adhesive tape 51 and the positioning protrusion 325 in this through hole. You may insert the front-end
  • the operator uses two left and right adhesive tapes 51, 51 for one laminated body of supported pieces 412, 422, 432, and avoids the tip of the positioning protrusion 325 to cover the adhesive tapes 51, 51.
  • the support pieces 412, 422, and 432 may be brought into contact with each other.
  • the display panel 22 is supported between the first frame 21 and the second frame 32 to which the optical sheet group 31 is attached. Specifically, the frame area of the display panel 22 is sandwiched between the first frame body 21 arranged on the front side and the second frame body 32 arranged on the back side via a buffer member (not shown). As a result, the optical sheet group 31 covers the display area of the display panel 22 from the back side.
  • the light guide plate 33 and the reflection sheet 34 are supported between the second frame 32 disposed on the front side and the supports 351 and 352 disposed on the back side. Specifically, the rear surface of the light guide plate 33 and the front surface of the reflection sheet 34 are arranged to face each other, and the upper side portion (or lower side portion) of the light guide plate 33 and the reflection sheet 34 is connected to the upper frame portion 321 of the second frame 32. It is sandwiched between the support body 351 (or the lower frame portion 322 and the support body 352 of the second frame body 32) via a buffer member (not shown). At this time, the reflection sheet 34 covers the rear surface of the light guide plate 33.
  • the light guide plate 33 covers the display area of the display panel 22 from the back side with the optical sheet group 31 interposed therebetween.
  • the BL chassis 24 accommodates the light guide plate 33 and the reflection sheet 34 supported by the second frame 32 and the supports 351 and 352, the light source units 361 and 362, and the heat sinks 371 and 372.
  • the heat sink 371 (or heat sink 372) and the support body 351 (or support body 352) are attached to the upper side part (or lower side part) of the wall part 241 of the BL chassis 24.
  • the light source unit 361 (or light source unit 362) is attached to the heat sink 371 (or heat sink 372).
  • the light source unit 361 (or the light source unit 362) is disposed to face the upper end surface (or the lower end surface) of the light guide plate 33 with an appropriate distance therebetween.
  • the light source units 361 and 362 may be configured to be opposed to the left and right side end surfaces of the light guide plate 33. Moreover, the structure provided only with one of the light source parts 361 and 362 may be sufficient.
  • the receiving unit 12 and the signal processing unit 13 are attached to the back side of the wall 241 of the BL chassis 24.
  • the columnar portions 141 and 142 of the stand 14 are attached to the lower portions of the reinforcing members 242 and 243 of the BL chassis 24.
  • the light emitted from the light source units 361 and 362 passes through the upper and lower end surfaces of the light guide plate 33 and enters the light guide plate 33.
  • Light incident on the inside of the light guide plate 33 is emitted from the front surface of the light guide plate 33.
  • the light emitted from the light guide plate 33 is diffused, condensed, and polarized by the optical sheet group 31, passes through the rear surface of the display panel 22, and enters the display panel 22.
  • the display panel 22 is illuminated from the back side by the backlight unit 23.
  • the light that has entered the display panel 22 passes through the display panel 22 or is blocked from passing through the display panel 22. As a result, an image is displayed in the display area of the display panel 22.
  • the optical sheet group 31 is not limited to the structure attached to the 2nd frame 32.
  • the optical sheet group 31 may be configured to be attached to the first frame body 21 or the cabinet 15 or the like.
  • the supported pieces 412, 422, and 432 of the optical sheets 41, 42, and 43 may have the same horizontal length and different vertical lengths.
  • the stacked body of the supported pieces 412, 422, and 432 has a vertically long staircase shape that increases from the upper end side toward the lower end side.
  • FIG. 7 is a horizontal cross-sectional view schematically showing the arrangement of optical sheets 41, 42, 43 provided in a conventional backlight unit.
  • FIG. 7 corresponds to FIG.
  • the backlight unit 23 of the present embodiment and the conventional backlight unit have substantially the same configuration.
  • the optical sheets 41, 42, and 43 provided in the conventional backlight unit have supported pieces 414, 424, and 434 in place of the supported pieces 412, 422, and 432 of the present embodiment.
  • the supported piece 414 corresponds to the supported piece 412 and has a through hole 413.
  • the supported pieces 424 and 434 correspond to the supported pieces 422 and 432 and have through holes 423 and 433.
  • the vertical and horizontal lengths of the supported pieces 414, 424, and 434 are equal to each other.
  • the supported piece 434 is entirely covered with the supported piece 424, and the supported piece 424 is entirely covered with the supported piece 414. End up.
  • the adhesive surface of the adhesive tape 51 adheres sufficiently to the front surface of the supported piece 414, but hardly adheres to any of the supported pieces 424 and 434.
  • the supported piece 414 can be attached to the upper frame portion 321 of the second frame 32, but the supported pieces 424 and 434 cannot be attached to the upper frame portion 321 of the second frame 32.
  • the optical sheet 41 is fixed to the upper frame portion 321 of the second frame 32, but the optical sheets 42 and 43 are not fixed and remain in a state that allows minute vibrations.
  • the optical sheets 42 and 43 vibrate slightly with the vibration of the television receiver 1.
  • the optical sheets 41, 42, and 43 may be rubbed against each other and their surfaces may be damaged.
  • the front surface of the optical sheet 41 rubbed against the display panel 22 may be damaged.
  • the optical sheet 43 and the light guide plate 33 are disposed close to or in contact with each other, the rear surface of the optical sheet 43 and the front surface of the light guide plate 33 that are rubbed together may be damaged. Damage to the optical sheets 41, 42, 43 or the light guide plate 33 causes unnecessary light scattering. That is, the optical function of the optical sheets 41, 42, 43 or the light guide plate 33 is deteriorated.
  • the operator attaches the rear surface of the supported piece 434 to the upper frame portion 321 of the second frame 32 using the first double-sided tape, and further uses the second double-sided tape to support the supported piece 424.
  • the rear surface is attached to the front surface of the supported piece 434
  • the rear surface of the supported piece 414 is attached to the front surface of the supported piece 424 using a third double-sided tape.
  • the minute vibrations of the optical sheets 41, 42, and 43 are suppressed, but the affixing operation using the three double-sided tapes is complicated.
  • the thickness of the three laminated double-sided tapes may hinder the thinning of the display device 11.
  • the micro vibration of each of the optical sheets 41, 42, 43 causes one adhesive tape 51 to be attached to one laminated body of the supported pieces 412, 422, 432. It is suppressed by using. For this reason, damage to the optical sheets 41, 42, 43 or the light guide plate 33 due to minute vibrations of the optical sheets 41, 42, 43 is suppressed. That is, the deterioration of the optical function of the optical sheets 41, 42, 43 or the light guide plate 33 is suppressed. Further, the pasting operation using the single adhesive tape 51 is simple. Furthermore, there is no possibility that the thickness of the adhesive tape 51 hinders the thinning of the display device 11.
  • FIG. 8 is a horizontal sectional view schematically showing the arrangement of the optical sheets 41, 42, 43 provided in the backlight unit 23 as the illumination device according to Embodiment 2 of the present invention.
  • FIG. 8 corresponds to FIG.
  • the display device 11 of the present embodiment has substantially the same configuration as the display device 11 of the first embodiment.
  • the optical sheets 41, 42 and 43 of the present embodiment have supported pieces 415, 425, 435 and an adhesive tape 52 instead of the supported pieces 412, 422, 432 and the adhesive tape 51 of the first embodiment.
  • the supported piece 415 corresponds to the supported piece 412 and has a through hole 413.
  • the supported pieces 425 and 435 correspond to the supported pieces 422 and 432 and have through holes 423 and 433.
  • the supported piece 425 of the optical sheet 42 has a smaller area than the supported piece 415 of the optical sheet 41
  • the supported piece 435 of the optical sheet 43 has a smaller area than the supported piece 425 of the optical sheet 42.
  • the lateral length of the supported piece 425 is shorter than the lateral length of the supported piece 415
  • the lateral length of the supported piece 435 is shorter than the lateral length of the supported piece 425.
  • the longitudinal lengths of the supported pieces 415, 425, and 435 are the same.
  • Each adhesive tape 52 is a rectangular double-sided tape that has heat resistance and is long in the left-right direction.
  • a through-hole 521 is formed in the center of the adhesive tape 52 in the vertical and horizontal directions.
  • the longitudinal length of the adhesive tape 52 is approximately the same as the longitudinal length of the front surface portion 32 a of the upper frame portion 321 according to the second frame body 32.
  • the operator inserts the positioning protrusion 325 of the upper frame portion 321 of the second frame 32 into the through hole 521 of the adhesive tape 52, and the adhesive surface on the back side of the adhesive tape 52 is the upper frame related to the second frame 32. It adheres to the front part 32a of the part 321.
  • the operator inserts the positioning protrusion 325 into the through hole 433 of the supported piece 435 of the optical sheet 43 and presses the rear surface of the supported piece 435 against the adhesive surface on the front side of the adhesive tape 52.
  • the operator inserts the positioning projection 325 into the through hole 423 of the supported piece 425 of the optical sheet 42 and presses the left and right ends of the rear surface of the supported piece 425 against the adhesive surface on the front side of the adhesive tape 52.
  • the central portion of the rear surface of the supported piece 425 in the left-right direction is in contact with the front surface of the supported piece 435 and does not contact the adhesive tape 52.
  • the operator inserts the positioning protrusion 325 into the through hole 413 of the supported piece 415 of the optical sheet 41 and presses the left and right ends of the rear surface of the supported piece 415 against the adhesive surface on the front side of the adhesive tape 52. .
  • the central portion of the rear surface of the supported piece 415 in the left-right direction is in contact with the front surface of the supported piece 425 and is not in contact with the adhesive tape 52.
  • the laminated body of the supported pieces 415, 425, and 435 of the optical sheets 41, 42, and 43 is collectively attached to the second frame 32.
  • the optical sheets 41, 42, and 43 are positioned with respect to the second frame 32, are stacked on the front side of the second frame 32, and are suspended from the upper frame portion 321 of the second frame 32. It is done.
  • the optical sheets 41, 42, and 43 are fixed to the second frame 32, respectively. That is, the optical sheets 41, 42, and 43 are suppressed from being vibrated minutely.
  • FIG. 9 is a horizontal cross-sectional view schematically showing the arrangement of the optical sheets 41, 42, 43 provided in the backlight unit 23 as the illumination device according to Embodiment 3 of the present invention.
  • the display device 11 of the present embodiment has substantially the same configuration as the display device 11 of the first embodiment.
  • M 3.
  • a positioning projection 326 similar to the positioning projection 325 of the upper frame portion 321 is provided on the lower frame portion 322 of the second frame body 32.
  • the positioning protrusion 326 is arranged at the center in the left-right direction of the lower frame portion 322.
  • the optical sheet 41 has a supported piece 416 in addition to the supported pieces 412, 412,.
  • the supported piece 416 is flush with the sheet body 411 and protrudes from the lower side of the sheet body 411.
  • a through hole similar to the through hole 413 is formed at the center position of the supported piece 416 in the vertical and horizontal directions.
  • the optical sheets 42 and 43 have supported pieces 426 and 436. Through holes similar to the through holes 423 and 433 are formed at the center positions of the supported pieces 426 and 436 in the vertical and horizontal directions.
  • the supported pieces 416, 426, 436 are inserted into the positioning projections 326 through the respective through holes, so that the optical sheets 41, 42, 43 with respect to the second frame 32 are provided in the same manner as the supported pieces 412, 422, 432. This contributes to the positioning and mounting.
  • the laminated body of the supported pieces 416, 426, and 436 also has a step shape like the laminated body of the supported pieces 412, 422, and 432. For this reason, if the laminated body of the supported pieces 416, 426, and 436 is attached to the lower frame portion 322 of the second frame body 32 using the adhesive tape 51, the minute vibrations of the optical sheets 41, 42, and 43 can be more reliably ensured. Can be suppressed.
  • the supported pieces of each optical sheet in the embodiment of the present invention are not limited to the configuration provided in the upper part of the optical sheet, and may be provided in the lower part, the left and right side parts, or the like. Moreover, the through-hole is not formed and the to-be-supported piece which does not contribute to positioning may be provided. This supported piece is affixed to a support member using an adhesive tape. In this case, the through hole is formed, and the supported piece that contributes to positioning may not be attached to the support member.
  • the display device is not limited to the display device 11 configured as the television receiver 1, and may be configured as an electronic signboard, a monitor for a personal computer, or the like.
  • the illumination device is not limited to the backlight unit 23 incorporated in the display device 11.
  • the lighting device may be configured as a backlight unit of a display unit included in a mobile phone or a portable information terminal device.
  • the lighting device may be configured as a ceiling light or a wall-mounted lighting fixture.
  • the light guide plate may be arranged in a horizontal posture with the front face downward.
  • the backlight unit 23 includes a light guide plate 33 that emits light emitted from the light source units 361 and 362 from the front, and N (N is a plurality of layers) arranged on the front side of the light guide plate 33. )
  • the backlight unit 23 including the optical sheets 41, 42, and 43 and the upper frame portion 321 that supports the N optical sheets 41, 42, and 43, the N optical sheets 41, 42, and 43 are provided.
  • the supported pieces 412, 422, 432 (supported pieces 415, 425, 435, or supported pieces 416, 426, 436, which are respectively reduced in order in the stacking direction at positions corresponding to each other in the respective peripheral portions.
  • the 416,426,436) characterized in that it comprises an adhesive tape 51 (an adhesive tape 52) pasted on said frame portion 321.
  • the backlight unit 23 includes a light guide plate 33 that emits light emitted from the light source units 361 and 362 from the front, and N (N is a plurality of layers) arranged on the front side of the light guide plate 33. )
  • the backlight unit 23 including the optical sheets 41, 42, and 43 and the upper frame portion 321 that supports the N optical sheets 41, 42, and 43, the N optical sheets 41, 42, and 43 are provided.
  • the supported pieces 412, 422, 432 (supported pieces 415, 425, 435, or supported pieces 416, 426, 436, which have respective areas sequentially increasing in the stacking direction at positions corresponding to each other in the respective peripheral portions.
  • the 416,426,436) characterized in that it comprises an adhesive tape 51 (an adhesive tape 52) pasted on said frame portion 321.
  • the upper frame portion 321 is disposed on one side in the stacking direction with respect to the N supported pieces 412, 422, 432 (supported pieces 416, 426, 436).
  • the N pieces of supported pieces 412, 422, 432 (supported pieces 416, 426, 436) have a larger area as they are closer to the upper frame portion 321, and the adhesive tape 51 is arranged in the stacking direction.
  • the N supported pieces 412, 422, 432 (supported pieces 416, 426, 436) are attached to the upper frame portion 321 from the other side.
  • the N pieces of supported pieces 412, 422, 432 are supported pieces having a large area.
  • 412, 422, 432 (supported pieces 415, 425, 435 or supported pieces 416, 426, 436) are characterized in that the length of the optical sheets 41, 42, 43 in the peripheral direction is longer.
  • the backlight unit 23 penetrates through the corresponding positions of the N supported pieces 412, 422, 432 (supported pieces 415, 425, 435, or supported pieces 416, 426, 436). Holes 413, 423, 433 are formed, and the upper frame portion 321 has the N pieces of supported pieces 412, 422, 432 (supported pieces 415, 425, 435, or supported pieces 416, 426, 436) is provided with positioning protrusions 325 (or positioning protrusions 326) to be inserted into the through holes 413, 423, 433.
  • the display device 11 according to the present invention includes the backlight unit 23 according to the present invention and a display panel 22 illuminated from the back side by the backlight unit 23.
  • a television receiver 1 according to the present invention includes a display device 11 according to the present invention and a receiving unit 12 that receives a television broadcast, and the display is based on the television broadcast received by the receiving unit 12. An image is displayed on the device 11.
  • the adhesive tape collectively attaches the N supported pieces to the support member.
  • the supported piece on one side in the stacking direction has a larger area than the supported piece on the other side in the stacking direction. Therefore, the stacked N supported pieces are arranged stepwise. At this time, the supported piece on the other side in the stacking direction covers a part of the supported piece on one side in the stacking direction and does not cover the remaining part. Therefore, if the adhesive tape is arranged on the other side in the stacking direction with respect to the N pieces of supported pieces, the portion of each supported piece that is not covered with the other supported pieces is sufficiently adhered to the adhesive tape.
  • a supported piece and an adhesive tape are arranged in this order. Then, the adhesive tape collectively pastes the N supported pieces onto the support member.
  • the worker who manufactures the lighting device can perform the attaching operation using the adhesive tape while visually recognizing the adhesive tape and at least a part of each of the N supported pieces. Therefore, workability can be improved.
  • the supported piece having a larger area has a longer length in the peripheral direction of the optical sheet. Therefore, the N supported pieces are arranged in a long step shape in the peripheral direction of the optical sheet. For this reason, the longitudinal direction of the adhesive tape can be arranged in the peripheral direction of the optical sheet. In this case, compared with the case where the longitudinal direction of the adhesive tape is arranged in a direction intersecting with the peripheral direction of the optical sheet, it is possible to promote narrowing of the display device.
  • each optical sheet can be positioned with respect to the support member by inserting the positioning protrusion of the support member into the through hole of each supported piece. If the N optical sheets are positioned and then N pieces of supported pieces are attached to the support member using an adhesive tape, it is possible to prevent the optical sheets from being misaligned during the attaching operation.
  • the display device 11 or the backlight unit 23 may include components that are not disclosed in the first to third embodiments.
  • the constituent elements (technical features) disclosed in each embodiment can be combined with each other, and a new technical feature can be formed by the combination.
  • Display device 22 Display panel 23 Backlight unit (lighting device) 321 Upper frame (support member) 325 Positioning protrusion 33 Light guide plate 361,362 Light source part 41,42,43 Optical sheet 412,422,432 Supported piece 413,423,433 Through hole 51,52 Adhesive tape

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

Abstract

Provided are an illumination device and a display device that can suppress damage to a light guide plate or an optical sheet caused by vibration of the optical sheet. Three supported pieces (412, 422, 432) disposed in a stacked manner are pasted to a second frame body (32) using adhesive tape (51). The supported pieces (412, 422, 432) are disposed in the given order from the front surface side to the back surface side, and increase in surface area in the given order. Therefore, approaching the adhesive surface of the adhesive tape (51) from the front surface side, the portions not covered by another supported piece (412, 422, 432) of the front surface of each of the supported pieces (412, 422, 432) sufficiently adhere to the adhesive surface of the adhesive tape (51). Therefore, it is possible to reliably paste the supported pieces (412, 422, 432) to the second frame body (32). As a result, it is possible to easily suppress vibrations of optical sheets (41, 42, 43) having the supported pieces (412, 422, 432).

Description

照明装置及び表示装置Lighting device and display device
　本発明は、複数枚の光学シートとこれらを支持する支持部材とを備える照明装置及び表示装置に関する。 The present invention relates to an illumination device and a display device including a plurality of optical sheets and a support member that supports them.
　液晶表示装置は、映像を表示する液晶表示パネルと、液晶表示パネルの背面側から液晶表示パネルを照明するバックライトユニットとを備える。
　従来、エッジライト方式のバックライトユニットが提案されている（特許文献１参照）。
　エッジライト方式のバックライトユニットは、液晶表示パネルの背面側に、光学シート群を介して導光板を配置し、導光板の端面に対向して、光源部を配置してなる。光学シート群は、夫々が光拡散機能又は集光機能等を有する複数枚の光学シートを積層してなる。 The liquid crystal display device includes a liquid crystal display panel that displays an image, and a backlight unit that illuminates the liquid crystal display panel from the back side of the liquid crystal display panel.
Conventionally, an edge light type backlight unit has been proposed (see Patent Document 1).
The edge light type backlight unit includes a light guide plate disposed on the back side of the liquid crystal display panel via an optical sheet group, and a light source unit disposed opposite the end surface of the light guide plate. The optical sheet group is formed by laminating a plurality of optical sheets each having a light diffusing function or a light collecting function.
　特許文献１に記載されている液晶表示装置の場合、光学シート群は、導光板を収容している下側ケースによって支持される。このために、３枚の光学シート（文中「拡散シート」及び「プリズムシート」）夫々の周縁部には、矩形状の突出部が設けられており、各突出部には、円形状の貫通孔が形成されている。一方、下側ケースには、正面側へ突出する円柱状の柱状部材が配されている。 In the case of the liquid crystal display device described in Patent Document 1, the optical sheet group is supported by a lower case that houses a light guide plate. For this purpose, a rectangular protrusion is provided at the peripheral edge of each of the three optical sheets (“diffusion sheet” and “prism sheet” in the text), and each protrusion has a circular through-hole. Is formed. On the other hand, the lower case is provided with a columnar columnar member protruding to the front side.
　突出部の貫通孔には、下側ケースの柱状部材が背面側から挿入される。この結果、各光学シートは下側ケースに対して位置決めされ、また、下側ケースによって支持される。 The columnar member of the lower case is inserted into the through hole of the protruding portion from the back side. As a result, each optical sheet is positioned with respect to the lower case and supported by the lower case.
特開２００２－１９６３１２号公報JP 2002-196212 A
　光学シートの突出部における貫通孔の内径は、下側ケースの柱状部材の外径以上である。従って、柱状部材の周面と貫通孔の内面との間に空隙が生じ得る。この結果、液晶表示装置の振動に伴い、各光学シートが微小振動することがある。このとき、光学シート同士、又は光学シートと導光板とが擦り合わされて、光学シート又は導光板の表面が損傷する虞がある。
　光学シートの振動を抑制するためには、粘着テープを用いて各光学シートの突出部を下側ケースに貼り付けることが考えられる。とはいえ、３枚の光学シート夫々の突出部を１枚ずつ下側ケースに貼り付ける作業は煩雑である。 The inner diameter of the through hole in the protruding portion of the optical sheet is equal to or greater than the outer diameter of the columnar member of the lower case. Accordingly, a gap may be generated between the peripheral surface of the columnar member and the inner surface of the through hole. As a result, each optical sheet may vibrate slightly with the vibration of the liquid crystal display device. At this time, the optical sheets or the optical sheet and the light guide plate are rubbed together, and the surface of the optical sheet or the light guide plate may be damaged.
In order to suppress the vibration of the optical sheet, it is conceivable to stick the protruding portion of each optical sheet to the lower case using an adhesive tape. However, the work of sticking the protruding portions of the three optical sheets one by one to the lower case is complicated.
　そこで、正面側から粘着テープを用いて、３枚の光学シート夫々の突出部を積層した状態で、下側ケースに貼り付けることが考えられる。
　しかしながら、このような構成の場合、最も正面側の１枚の光学シートと下側ケースとの間で、背面側の２枚の光学シート夫々が微小振動してしまうことを抑制することができない。何故ならば、各光学シートの突出部は、正面視の形状及び寸法が同一であり、正面側の突出部が、背面側の突出部を全面的に被覆してしまうからである。故に、最も正面側の１枚の光学シートは突出部が粘着テープの粘着面に十分に接着する。一方、背面側の２枚の光学シート夫々は、突出部が粘着テープの粘着面にほとんど接着することができない。 Therefore, it is conceivable to use an adhesive tape from the front side and attach the protrusions of the three optical sheets to the lower case in a stacked state.
However, in the case of such a configuration, it is impossible to suppress the minute vibrations of the two optical sheets on the back side between the optical sheet on the most front side and the lower case. This is because the protrusions of the optical sheets have the same shape and dimensions as viewed from the front, and the protrusions on the front side entirely cover the protrusions on the back side. Therefore, the projecting portion of one optical sheet on the most front side is sufficiently adhered to the adhesive surface of the adhesive tape. On the other hand, in each of the two optical sheets on the back side, the protruding portion hardly adheres to the adhesive surface of the adhesive tape.
　本発明は斯かる事情に鑑みてなされたものであり、その主たる目的は、光学シートの振動に起因する光学シート又は導光板の損傷を抑制することができる照明装置及び表示装置を提供することにある。 The present invention has been made in view of such circumstances, and a main object thereof is to provide an illumination device and a display device that can suppress damage to the optical sheet or the light guide plate due to vibration of the optical sheet. is there.
　本発明に係る照明装置は、光源部が発した光を一面から出射する導光板と、該導光板の前記一面の側にて積層配置されているＮ（Ｎは複数）枚の光学シートと、該Ｎ枚の光学シートを支持する支持部材とを備える照明装置において、前記Ｎ枚の光学シート夫々の周縁部における互いに対応する位置に、夫々の面積を積層方向に順に減少してある被支持片が設けられており、前記Ｎ枚の光学シートの互いに対応するＮ枚の被支持片を前記支持部材に貼り付ける粘着テープを備えることを特徴とする。 An illumination device according to the present invention includes a light guide plate that emits light emitted from a light source unit from one surface, and N (N is a plurality) optical sheets that are stacked on the one surface side of the light guide plate, And a support member for supporting the N optical sheets, wherein the supported pieces have respective areas sequentially reduced in the stacking direction at positions corresponding to each other at the peripheral edge of each of the N optical sheets. And an adhesive tape for affixing the N supported pieces of the N optical sheets corresponding to each other to the support member.
　本発明に係る照明装置は、光源部が発した光を一面から出射する導光板と、該導光板の前記一面の側にて積層配置されているＮ（Ｎは複数）枚の光学シートと、該Ｎ枚の光学シートを支持する支持部材とを備える照明装置において、前記Ｎ枚の光学シート夫々の周縁部における互いに対応する位置に、夫々の面積を積層方向に順に増大してある被支持片が設けられており、前記Ｎ枚の光学シートの互いに対応するＮ枚の被支持片を前記支持部材に貼り付ける粘着テープを備えることを特徴とする。 An illumination device according to the present invention includes a light guide plate that emits light emitted from a light source unit from one surface, and N (N is a plurality) optical sheets that are stacked on the one surface side of the light guide plate, And a support member for supporting the N optical sheets, wherein the supported pieces have their respective areas sequentially increased in the stacking direction at positions corresponding to each other at the peripheral edge of each of the N optical sheets. And an adhesive tape for affixing the N supported pieces of the N optical sheets corresponding to each other to the support member.
　本発明に係る照明装置は、前記支持部材は、前記Ｎ枚の被支持片よりも前記積層方向の一側に配されており、前記Ｎ枚の被支持片は、前記支持部材に近いものほど面積が大きく、前記粘着テープは、前記積層方向の他側から前記Ｎ枚の被支持片を前記支持部材に貼り付けていることを特徴とする。 In the lighting device according to the present invention, the support member is arranged on one side of the stacking direction with respect to the N supported pieces, and the N supported pieces are closer to the support member. The adhesive tape has a large area, and the N pieces to be supported are attached to the support member from the other side in the stacking direction.
　本発明に係る照明装置は、前記Ｎ枚の被支持片は、面積が大きい被支持片ほど、前記光学シートの周縁方向の長さが長いことを特徴とする。 The illumination device according to the present invention is characterized in that the N pieces to be supported are longer in the peripheral direction of the optical sheet as the supported piece has a larger area.
　本発明に係る照明装置は、前記Ｎ枚の被支持片夫々の対応する位置には貫通孔が形成してあり、前記支持部材には、前記Ｎ枚の被支持片の貫通孔に挿入される位置決め突起が設けられていることを特徴とする。 In the illumination device according to the present invention, a through hole is formed at a corresponding position of each of the N supported pieces, and the support member is inserted into the through hole of the N supported pieces. A positioning protrusion is provided.
　本発明に係る表示装置は、本発明に係る照明装置と、該照明装置によって背面側から照明される表示パネルとを備えることを特徴とする。 A display device according to the present invention includes the illumination device according to the present invention and a display panel illuminated from the back side by the illumination device.
　本発明に係るテレビジョン受信機は、本発明に係る表示装置と、テレビジョン放送を受信する受信部とを備え、該受信部にて受信したテレビジョン放送に基づいて、前記表示装置に映像を表示するようにしてあることを特徴とする。 A television receiver according to the present invention includes the display device according to the present invention and a receiving unit that receives a television broadcast, and an image is displayed on the display device based on the television broadcast received by the receiving unit. It is characterized by being displayed.
　本発明の照明装置及び表示装置による場合、Ｎ枚の被支持片の内、積層方向の一側の被支持片は、積層方向の他側の被支持片よりも面積が大きい。このため、Ｎ枚の被支持片よりも積層方向の他側に粘着テープを配置すれば、各被支持片が、粘着テープに十分に接着する。故に、Ｎ枚の被支持片夫々を支持部材に確実に貼り付けることができる。即ち、Ｎ枚の光学シート夫々を支持部材に簡便に固定することができる。この結果、Ｎ枚の光学シート夫々の振動を容易に抑制することができる。従って、光学シートの振動に起因する光学シート又は導光板の損傷を抑制することができる。 In the lighting device and the display device of the present invention, of the N supported pieces, the supported piece on one side in the stacking direction has a larger area than the supported piece on the other side in the stacking direction. For this reason, if an adhesive tape is arrange | positioned on the other side of a lamination direction rather than the N pieces of to-be-supported pieces, each to-be-supported piece will fully adhere | attach to an adhesive tape. Therefore, each of the N supported pieces can be securely attached to the support member. That is, each of the N optical sheets can be simply fixed to the support member. As a result, vibration of each of the N optical sheets can be easily suppressed. Therefore, damage to the optical sheet or the light guide plate due to the vibration of the optical sheet can be suppressed.
本発明の実施の形態１に係る表示装置を備えるテレビジョン受信機の構成を略示する斜視図である。1 is a perspective view schematically showing a configuration of a television receiver including a display device according to Embodiment 1 of the present invention. テレビジョン受信機の構成を略示する分解斜視図である。It is a disassembled perspective view which briefly shows the structure of a television receiver. テレビジョン受信機の構成を略示する拡大分解斜視図である。It is an expansion disassembled perspective view which shows the structure of a television receiver schematically. 本発明の実施の形態１に係る照明装置としてのバックライトユニットが備える光学シートの配置を模式的に示す正面図である。It is a front view which shows typically arrangement | positioning of the optical sheet with which the backlight unit as an illuminating device which concerns on Embodiment 1 of this invention is provided. 本発明の実施の形態１に係る照明装置としてのバックライトユニットが備える光学シートの配置を模式的に示す水平断面図である。It is a horizontal sectional view which shows typically arrangement of an optical sheet with which a backlight unit as an illuminating device concerning Embodiment 1 of the present invention is provided. バックライトユニットの組み立て手順を説明するための模式的な水平断面図である。It is a typical horizontal sectional view for demonstrating the assembly procedure of a backlight unit. 従来のバックライトユニットが備える光学シートの配置を模式的に示す水平断面図である。It is a horizontal sectional view which shows typically arrangement of an optical sheet with which a conventional backlight unit is provided. 本発明の実施の形態２に係る照明装置としてのバックライトユニットが備える光学シートの配置を模式的に示す水平断面図である。It is a horizontal sectional view which shows typically arrangement | positioning of the optical sheet with which the backlight unit as an illuminating device which concerns on Embodiment 2 of this invention is provided. 本発明の実施の形態３に係る照明装置としてのバックライトユニットが備える光学シートの配置を模式的に示す水平断面図である。It is a horizontal sectional view which shows typically arrangement | positioning of the optical sheet with which the backlight unit as an illuminating device which concerns on Embodiment 3 of this invention is provided.
　以下、本発明を、その実施の形態を示す図面に基づいて詳述する。以下の説明では、図において矢符で示す上下、前後、及び左右を使用する。 Hereinafter, the present invention will be described in detail based on the drawings showing the embodiments thereof. In the following description, up and down, front and rear, and left and right indicated by arrows in the figure are used.
（実施の形態　１．）
　図１、図２、及び図３は、本発明の実施の形態１に係る表示装置１１を備えるテレビジョン受信機１の構成を略示する斜視図、分解斜視図、及び拡大分解斜視図である。
　図４及び図５は、本発明の実施の形態１に係る照明装置としてのバックライトユニット２３が備える光学シート４１，４２，４３の配置を模式的に示す正面図及び水平断面図である。図５は、図４のIV－IV線の断面図でもある。
　図６は、バックライトユニット２３の組み立て手順を説明するための模式的な水平断面図である。 (Embodiment 1.)
1, FIG. 2, and FIG. 3 are a perspective view, an exploded perspective view, and an enlarged exploded perspective view schematically showing a configuration of a television receiver 1 including the display device 11 according to Embodiment 1 of the present invention. .
4 and 5 are a front view and a horizontal cross-sectional view schematically showing the arrangement of the optical sheets 41, 42, and 43 provided in the backlight unit 23 as the illumination device according to Embodiment 1 of the present invention. FIG. 5 is also a cross-sectional view taken along line IV-IV in FIG.
FIG. 6 is a schematic horizontal sectional view for explaining an assembly procedure of the backlight unit 23.
　テレビジョン受信機１は、表示装置１１、受信部１２、信号処理部１３、スタンド１４、及びキャビネット１５等を備える。
　表示装置１１は、第１枠体２１、表示パネル２２、バックライトユニット２３、及びバックライトシャーシ（以下、ＢＬシャーシという）２４を備える。
　バックライトユニット２３は、光学シート群３１、第２枠体３２、導光板３３、反射シート３４、支持体３５１，３５２、光源部３６１，３６２、及びヒートシンク３７１，３７２を備える。 The television receiver 1 includes a display device 11, a receiving unit 12, a signal processing unit 13, a stand 14, a cabinet 15, and the like.
The display device 11 includes a first frame body 21, a display panel 22, a backlight unit 23, and a backlight chassis (hereinafter referred to as “BL chassis”) 24.
The backlight unit 23 includes an optical sheet group 31, a second frame 32, a light guide plate 33, a reflection sheet 34, supports 351 and 352, light source units 361 and 362, and heat sinks 371 and 372.
　まず、テレビジョン受信機１の大略について説明する。
　テレビジョン受信機１は据え置き式である。表示装置１１は矩形状である。表示装置１１は受信部１２及び信号処理部１３を内蔵し、表示パネル２２の表示領域を露出させた状態でキャビネット１５に収容される。スタンド１４は、表示装置１１を載置台（例えばいわゆるテレビ台）に載置するための脚部として機能し、表示装置１１を縦姿勢で支持する。
　なお、テレビジョン受信機１は、据え置き式に限定されず、例えば壁掛け式でもよい。この場合、テレビジョン受信機１がスタンド１４を備えている必要はない。
　受信部１２及び信号処理部１３は表示装置１１の外部にあってもよい。 First, an outline of the television receiver 1 will be described.
The television receiver 1 is a stationary type. The display device 11 has a rectangular shape. The display device 11 includes a receiving unit 12 and a signal processing unit 13 and is accommodated in the cabinet 15 with the display area of the display panel 22 exposed. The stand 14 functions as a leg for mounting the display device 11 on a mounting table (for example, a so-called television table), and supports the display device 11 in a vertical posture.
Note that the television receiver 1 is not limited to a stationary type, and may be a wall-mounted type, for example. In this case, the television receiver 1 does not have to include the stand 14.
The receiving unit 12 and the signal processing unit 13 may be outside the display device 11.
　次に、テレビジョン受信機１の各部について説明する。
　表示パネル２２は液晶表示パネルを用いてなる。表示パネル２２は、矩形状になしてあり、縦姿勢で配される。表示パネル２２は矩形状の表示領域と、表示領域を囲繞する矩形枠状の額縁領域とを有する。表示パネル２２は、正面側のガラス基板と背面側のガラス基板とを用いてなる。２枚のガラス基板の間には液晶が封止されている。表示パネル２２の透過率は、表示パネル２２の液晶に印加された電圧に応じて変化する。 Next, each part of the television receiver 1 will be described.
The display panel 22 is a liquid crystal display panel. The display panel 22 has a rectangular shape and is arranged in a vertical posture. The display panel 22 has a rectangular display area and a rectangular frame-shaped frame area surrounding the display area. The display panel 22 includes a front glass substrate and a rear glass substrate. Liquid crystal is sealed between the two glass substrates. The transmittance of the display panel 22 changes according to the voltage applied to the liquid crystal of the display panel 22.
　第１枠体２１及び第２枠体３２は、夫々矩形状になしてある。第１枠体２１は、表示パネル２２の上辺部及び下辺部と左辺部及び右辺部とに対応する各横棒状の上枠部２１１及び下枠部２１２と各縦棒状の左枠部２１３及び右枠部２１４とを有する。第２枠体３２は、第１枠体２１の上枠部２１１及び下枠部２１２と左枠部２１３及び右枠部２１４とに対応する各横棒状の上枠部（支持部材）３２１及び下枠部３２２と各縦棒状の左枠部３２３及び右枠部３２４とを有する。
　第１枠体２１（又は第２枠体３２）の開口の上下方向及び左右方向夫々の長さ（以下、縦横長さという）は、表示パネル２２の表示領域の縦横長さと同程度である。 The first frame body 21 and the second frame body 32 are each rectangular. The first frame body 21 has an upper frame portion 211 and a lower frame portion 212 corresponding to the upper and lower sides, the left side and the right side of the display panel 22, and a left frame portion 213 and a right frame. Frame portion 214. The second frame 32 includes upper frame portions (support members) 321 and lower bars corresponding to the upper frame portion 211 and the lower frame portion 212, the left frame portion 213, and the right frame portion 214 of the first frame body 21, respectively. It has the frame part 322, the left frame part 323, and the right frame part 324 of each vertical bar shape.
The lengths of the openings of the first frame 21 (or the second frame 32) in the vertical direction and the horizontal direction (hereinafter referred to as vertical and horizontal lengths) are approximately the same as the vertical and horizontal lengths of the display area of the display panel 22.
　第２枠体３２の上枠部３２１はアングル材を用いてなり、縦姿勢の前面部３２ａと、横姿勢の上面部３２ｂとを有する。前面部３２ａの上端部と上面部３２ｂの前端部とは一体に連結されている。
　上枠部３２１の前面部３２ａには、正面視矩形状の位置決め突起３２５がＭ個突設されている（図３には２個のみ図示、図４～図６には各１個図示）。ここで、Ｍは自然数であり、本実施の形態ではＭ＝５である。Ｍ個の位置決め突起３２５，３２５，…は、前面部３２ａの左端部から右端部に亘って左右方向に等配されている。 The upper frame portion 321 of the second frame body 32 is made of an angle material, and has a front surface portion 32a in a vertical posture and an upper surface portion 32b in a horizontal posture. The upper end portion of the front surface portion 32a and the front end portion of the upper surface portion 32b are integrally connected.
The front frame portion 32a of the upper frame portion 321 is provided with M positioning projections 325 having a rectangular shape in front view (only two are shown in FIG. 3 and one is shown in FIGS. 4 to 6). Here, M is a natural number, and M = 5 in the present embodiment. The M positioning projections 325, 325,... Are equally arranged in the left-right direction from the left end portion to the right end portion of the front surface portion 32a.
　光学シート群３１は、Ｎ枚の光学シート４１，４２，…が積層配置されたものである。ここで、ＮはＮ≧２の自然数であり、本実施の形態ではＮ＝３である。光学シート４３，４２，４１は、背面側から正面側へこの順に積層配置される。つまり、光学シート４１，４２，４３の積層方向は背面側から正面側へ向かう方向である。 The optical sheet group 31 is formed by stacking N optical sheets 41, 42,. Here, N is a natural number of N ≧ 2, and N = 3 in the present embodiment. The optical sheets 43, 42, and 41 are stacked in this order from the back side to the front side. That is, the stacking direction of the optical sheets 41, 42, 43 is a direction from the back side to the front side.
　光学シート４１は、例えば偏光機能を有する合成樹脂製のシートである。光学シート４１は、矩形状のシート本体４１１と、Ｍ個の被支持片４１２，４１２，…とを一体に有する。
　シート本体４１１の縦横長さは、第２枠体３２の開口の縦横長さよりも長い。また、シート本体４１１の左右方向の長さ（以下、横長さという）は、第２枠体３２に係る上枠部３２１の前面部３２ａの横長さと同程度である。 The optical sheet 41 is a synthetic resin sheet having a polarization function, for example. The optical sheet 41 integrally includes a rectangular sheet body 411 and M supported pieces 412, 412,.
The vertical and horizontal lengths of the sheet main body 411 are longer than the vertical and horizontal lengths of the opening of the second frame body 32. Further, the length in the left-right direction of the sheet main body 411 (hereinafter referred to as the horizontal length) is approximately the same as the horizontal length of the front surface portion 32 a of the upper frame portion 321 related to the second frame body 32.
　各被支持片４１２はシート本体４１１に対して面一であり、シート本体４１１の上辺部（周縁部）に突設されている。被支持片４１２の上下左右方向中央部には、矩形状の貫通孔４１３が形成してある。被支持片４１２の上下方向の長さ（以下、縦長さという）は、第２枠体３２に係る上枠部３２１の前面部３２ａの上下長さと同程度である。 Each supported piece 412 is flush with the sheet body 411 and protrudes from the upper side (periphery) of the sheet body 411. A rectangular through hole 413 is formed at the center of the supported piece 412 in the vertical and horizontal directions. The length of the supported piece 412 in the vertical direction (hereinafter referred to as the vertical length) is approximately the same as the vertical length of the front surface portion 32 a of the upper frame portion 321 related to the second frame body 32.
　Ｍ個の被支持片４１２，４１２，…は、シート本体４１１の上辺部の左端部から右端部に亘って左右方向に等配されている。被支持片４１２，４１２，…の内、左側４個は同一形状（具体的には矩形状）になしてあるが、最も右側の１個は、他の４個とは異なる形状（具体的には矩形の一隅が切り欠かれたような形状）になしてある。このため、被支持片４１２，４１２，…夫々の配置位置及び形状を手掛かりにすれば、作業者は光学シート４１の上下左右を容易に判別することができる。 M pieces of supported pieces 412, 412,... Are equally arranged in the left-right direction from the left end portion to the right end portion of the upper side portion of the sheet main body 411. Of the supported pieces 412, 412,..., The left four have the same shape (specifically, rectangular shape), but the rightmost one has a shape (specifically, different from the other four). Is a shape in which one corner of the rectangle is cut out). For this reason, if the arrangement positions and shapes of the supported pieces 412, 412,... Are used as clues, the operator can easily determine the top, bottom, left, and right of the optical sheet 41.
　光学シート４２は、例えば集光機能を有する合成樹脂製のシートであり、光学シート４３は、例えば光拡散機能を有する合成樹脂製のシートである。光学シート４２，４３夫々の形状は、光学シート４１の形状と略同様の構成である。即ち、光学シート４２は、シート本体４２１とＭ個の被支持片４２２，４２２，…とを一体に有し、光学シート４３は、シート本体４３１とＭ個の被支持片４３２，４３２，…とを一体に有する。各被支持片４２２は貫通孔４２３を有し、各被支持片４３２は貫通孔４３３を有する。 The optical sheet 42 is, for example, a synthetic resin sheet having a light condensing function, and the optical sheet 43 is, for example, a synthetic resin sheet having a light diffusion function. The shape of each of the optical sheets 42 and 43 is substantially the same as the shape of the optical sheet 41. That is, the optical sheet 42 integrally includes a sheet main body 421 and M supported pieces 422, 422,..., And the optical sheet 43 includes a sheet main body 431 and M supported pieces 432, 432,. Are integrated. Each supported piece 422 has a through hole 423, and each supported piece 432 has a through hole 433.
　光学シート４１，４２，４３の各Ｍ個の被支持片４１２，４１２，…と被支持片４２２，４２２，…と被支持片４３２，４３２，…とは、互いに対応する位置（具体的には上下左右方向に関して同じ位置）に配される。このため、光学シート４１，４２，４３の各Ｍ個の貫通孔４１３，４１３，…と貫通孔４２３，４２３，…と貫通孔４３３，４３３，…とは、互いに対応する位置に配される。各貫通孔４１３，４２３，４３３夫々の縦横長さは、位置決め突起３２５の縦横長さより長い。 The M pieces of supported pieces 412, 412, ..., the supported pieces 422, 422, ... and the supported pieces 432, 432, ... of the optical sheets 41, 42, 43 correspond to each other (specifically, The same position in the vertical and horizontal directions). Therefore, the M through holes 413, 413,..., The through holes 423, 423,... And the through holes 433, 433, etc. of the optical sheets 41, 42, 43 are arranged at positions corresponding to each other. The vertical and horizontal lengths of the through holes 413, 423 and 433 are longer than the vertical and horizontal lengths of the positioning protrusions 325.
　ただし、光学シート４２の被支持片４２２は、光学シート４１の被支持片４１２よりも面積が大きく、光学シート４３の被支持片４３２は、光学シート４２の被支持片４２２よりも面積が大きい。このために、被支持片４２２の横長さは、被支持片４１２の横長さよりも長く、被支持片４３２の横長さは、被支持片４２２の横長さよりも長くしてある（例えば被支持片４１２，４２２，４３２の順に30mm、40mm、及び50mm）。一方、被支持片４１２，４２２，４３２夫々の縦長さは等しい（例えば9.5mm ）。 However, the supported piece 422 of the optical sheet 42 has a larger area than the supported piece 412 of the optical sheet 41, and the supported piece 432 of the optical sheet 43 has a larger area than the supported piece 422 of the optical sheet 42. For this reason, the lateral length of the supported piece 422 is longer than the lateral length of the supported piece 412, and the lateral length of the supported piece 432 is longer than the lateral length of the supported piece 422 (for example, the supported piece 412. , 422, 432 in the order of 30 mm, 40 mm, and 50 mm). On the other hand, the longitudinal lengths of the supported pieces 412, 422, and 432 are equal (for example, 9.5 mm).
　つまり、互いに対応するＮ枚の被支持片４１２，４２２，４３２は、夫々の面積が積層方向に順に減少する。換言すれば、背面側に積層されるものほど面積が大きい。また、Ｎ枚の被支持片４１２，４２２，４３２は、面積が大きいものほど、横長さ（即ち光学シート４１，４２，４３夫々の周縁方向の長さ）が長い。
　被支持片４１２，４２２，４３２夫々の厚みの和（即ち、被支持片４１２，４２２，４３２の積層体の厚み）は、位置決め突起３２５の第２枠体３２の上枠部３２１からの突出量よりも小さい。 That is, the areas of the N supported pieces 412, 422, 432 corresponding to each other are sequentially reduced in the stacking direction. In other words, the area stacked on the back side is larger. Further, the N supported pieces 412, 422, and 432 have a longer lateral length (that is, a length in the peripheral direction of each of the optical sheets 41, 42, and 43) as the area is larger.
The sum of the thicknesses of the supported pieces 412, 422, 432 (that is, the thickness of the stacked body of the supported pieces 412, 422, 432) is the amount of protrusion of the positioning protrusion 325 from the upper frame portion 321 of the second frame body 32. Smaller than.
　導光板３３は矩形板状になしてある。導光板３３は、例えばアクリル樹脂を用いてなる。導光板３３の縦横長さは、第２枠体３２の開口の縦横長さよりも長い。
　導光板３３は、導光板３３の内部に入射した光を、導光板３３の前面から出射させる。ただし、導光板３３の内部に入射した光の一部が導光板３３の後面を透過する（即ち漏光が生じる）ことがある。
　反射シート３４は矩形状になしてある、反射シート３４の縦横長さは導光板３３の縦横長さよりも長い。 The light guide plate 33 has a rectangular plate shape. The light guide plate 33 is made of, for example, acrylic resin. The vertical and horizontal lengths of the light guide plate 33 are longer than the vertical and horizontal lengths of the openings of the second frame body 32.
The light guide plate 33 causes the light incident on the light guide plate 33 to be emitted from the front surface of the light guide plate 33. However, part of the light incident on the inside of the light guide plate 33 may be transmitted through the rear surface of the light guide plate 33 (that is, light leakage occurs).
The reflection sheet 34 has a rectangular shape. The vertical and horizontal lengths of the reflection sheet 34 are longer than the vertical and horizontal lengths of the light guide plate 33.
　支持体３５１，３５２は、各横棒状になしてある。支持体３５１，３５２夫々の長さは、反射シート３４の横長さと同程度である。
　光源部３６１は、横姿勢に配された左右方向に細長い矩形状のＬＥＤ基板と、ＬＥＤ基板の下面に、左右方向に一列に等配実装された複数個のＬＥＤとを有する。光源部３６１の横長さは、導光板３３の横長さと同程度である。光源部３６２は、光源部３６１と略同様の構成であるが、複数個のＬＥＤはＬＥＤ基板の上面に実装してある。
　ヒートシンク３７１，３７２夫々は、横姿勢で配されたアングル材を用いてなる。ヒートシンク３７１，３７２夫々の横長さは、光源部３６１，３６２夫々の横長さと同程度である。光源部３６１，３６２が発した熱は、ヒートシンク３７１，３７２を介してテレビジョン受信機１の外部に排出される。 The supports 351 and 352 are in the form of horizontal bars. The lengths of the supports 351 and 352 are approximately the same as the lateral length of the reflection sheet 34.
The light source unit 361 includes a rectangular LED board elongated in the left-right direction arranged in a horizontal posture, and a plurality of LEDs equally mounted in a line in the left-right direction on the lower surface of the LED board. The lateral length of the light source unit 361 is approximately the same as the lateral length of the light guide plate 33. The light source unit 362 has substantially the same configuration as the light source unit 361, but a plurality of LEDs are mounted on the upper surface of the LED substrate.
Each of the heat sinks 371 and 372 is made of an angle material arranged in a horizontal posture. The horizontal lengths of the heat sinks 371 and 372 are approximately the same as the horizontal lengths of the light source units 361 and 362, respectively. Heat generated by the light source units 361 and 362 is discharged to the outside of the television receiver 1 through the heat sinks 371 and 372.
　ＢＬシャーシ２４は矩形トレイ状の収容体である。ＢＬシャーシ２４は、皿の底面に相当する正面視矩形状の壁部２４１と、皿の周面に相当する周面部とを有する。
　壁部２４１の正面側には、ＢＬシャーシ２４を補強する２個の補強材２４２，２４３が左右方向に並設されている。補強材２４２，２４３夫々は、縦姿勢の棒状部材である。 The BL chassis 24 is a rectangular tray-shaped container. The BL chassis 24 has a rectangular wall portion 241 in front view corresponding to the bottom surface of the plate and a peripheral surface portion corresponding to the peripheral surface of the plate.
On the front side of the wall portion 241, two reinforcing members 242 and 243 that reinforce the BL chassis 24 are juxtaposed in the left-right direction. Each of the reinforcing members 242 and 243 is a bar member in a vertical posture.
　受信部１２は、図示しない受信回路が実装された回路基板である。受信回路は、図示しないアンテナを介して外部からテレビジョン放送を受信する。
　信号処理部１３は、図示しない信号処理回路が実装された回路基板である。信号処理回路は、受信部１２が受信したテレビジョン信号に所定の信号処理を施すことによって、映像データを出力する。
　スタンド１４には、夫々縦姿勢で配された左右２本の柱状部１４１，１４２が突設されている。 The receiving unit 12 is a circuit board on which a not-shown receiving circuit is mounted. The receiving circuit receives a television broadcast from the outside via an antenna (not shown).
The signal processing unit 13 is a circuit board on which a signal processing circuit (not shown) is mounted. The signal processing circuit outputs video data by performing predetermined signal processing on the television signal received by the receiving unit 12.
The stand 14 is provided with two left and right columnar portions 141 and 142 that are arranged in a vertical posture.
　次に、テレビジョン受信機１の各部の位置関係を説明する。
　図６に示すように、第２枠体３２の上枠部３２１の位置決め突起３２５，３２５，…は、まず、光学シート４３の被支持片４３２，４３２，…の貫通孔４３３，４３３，…に背面側から挿入され、次いで、光学シート４２の被支持片４２２，４２２，…の貫通孔４２３，４２３，…に背面側から挿入され、次に、光学シート４１の被支持片４１２，４１２，…の貫通孔４１３，４１３，…に背面側から挿入される。すると、各位置決め突起３２５が貫通孔４１３，４２３，４３３に遊嵌される。位置決め突起３２５の先端部は、光学シート４１の被支持片４１２から正面側に突出する（図５参照）。 Next, the positional relationship of each part of the television receiver 1 will be described.
As shown in FIG. 6, the positioning projections 325, 325,... Of the upper frame portion 321 of the second frame 32 are first formed in the through holes 433, 433,. .. Are inserted from the back side into the through holes 423, 423,... Of the supported pieces 422, 422,... Of the optical sheet 42, and then the supported pieces 412, 412,. Are inserted into the through holes 413, 413,. Then, each positioning protrusion 325 is loosely fitted in the through holes 413, 423, 433. The front end of the positioning protrusion 325 protrudes from the supported piece 412 of the optical sheet 41 to the front side (see FIG. 5).
　以上の結果、光学シート４１，４２，４３は第２枠体３２に対して位置決めされ、第２枠体３２の正面側にて光学シート４３，４２，４１の順に積層配置されて、第２枠体３２の上枠部３２１から吊り下げられる。
　このとき、図５に示すように、各被支持片４１２は、被支持片４２２の左右方向中央部を被覆し、被支持片４２２は、被支持片４３２の左右方向中央部を被覆する。故に、各被支持片４１２の前面と、被支持片４２２，４３２夫々の前面の左右両端部とは、他の被支持片４１２，４２２，４３２に被覆されることなく露出している。換言すれば、被支持片４１２，４２２，４３２の積層体は、左右両端部側から左右方向中央部側に向けて高くなる横長の階段状をなす。 As a result, the optical sheets 41, 42, 43 are positioned with respect to the second frame 32, and the optical sheets 43, 42, 41 are stacked in this order on the front side of the second frame 32, and the second frame It is suspended from the upper frame portion 321 of the body 32.
At this time, as shown in FIG. 5, each supported piece 412 covers the center part in the left-right direction of the supported piece 422, and the supported piece 422 covers the center part in the left-right direction of the supported piece 432. Therefore, the front surface of each supported piece 412 and the left and right end portions of the front surfaces of the supported pieces 422 and 432 are exposed without being covered by the other supported pieces 412, 422 and 432. In other words, the stacked body of the supported pieces 412, 422, and 432 has a horizontally long staircase shape that increases from the left and right end portions toward the center in the left-right direction.
　各位置決め突起３２５の周面と貫通孔４１３，４２３，４３３の内面との間には空隙が生じる。故に、このままでは光学シート４１，４２，４３夫々は、第２枠体３２の上枠部３２１から吊り下げられた姿勢で微小振動可能な状態にある。
　そこで、光学シート４１，４２，４３夫々の微小振動を抑制すべく、Ｍ枚の粘着テープ５１，５１，…が用いられる。
　各粘着テープ５１は透光性及び耐熱性を有する。粘着テープ５１は、左右方向に長い矩形状の片面テープである。粘着テープ５１の横長さ（即ち長手方向の長さ）は、被支持片４３２の横長さよりも長く、例えば65mmである。このとき、粘着テープ５１の短手方向の長さは、被支持片４１２，４２２，４３２夫々の縦長さよりも長く、例えば17mmである。何故ならば、粘着テープ５１は、後述するように、短手方向中央部で折り曲げられたＬ字状の状態で貼り付けられるからである。粘着テープ５１の厚みは十分に薄い（例えば0.2mm ）。 A gap is formed between the peripheral surface of each positioning protrusion 325 and the inner surfaces of the through holes 413, 423, and 433. Therefore, in this state, the optical sheets 41, 42, and 43 are in a state in which the optical sheets 41, 42, and 43 can be minutely vibrated in a posture suspended from the upper frame portion 321 of the second frame body 32.
Therefore, M adhesive tapes 51, 51,... Are used to suppress minute vibrations of the optical sheets 41, 42, 43, respectively.
Each adhesive tape 51 has translucency and heat resistance. The adhesive tape 51 is a rectangular single-sided tape that is long in the left-right direction. The lateral length (that is, the length in the longitudinal direction) of the adhesive tape 51 is longer than the lateral length of the supported piece 432, for example, 65 mm. At this time, the length of the adhesive tape 51 in the short direction is longer than the vertical length of each of the supported pieces 412, 422, and 432, and is, for example, 17 mm. This is because, as will be described later, the adhesive tape 51 is affixed in an L-shaped state bent at the center in the short direction. The thickness of the adhesive tape 51 is sufficiently thin (for example, 0.2 mm).
　作業者は、光学シート４１，４２，４３の各被支持片４１２，４２２，４３２の積層体に対し、粘着テープ５１の粘着面を、正面側から接近させる。このとき、作業者は、粘着テープ５１の下半分について、左右方向中央部を被支持片４１２に押し付け、左右方向中央部よりも左右両側部を、被支持片４２２の左右両端部、被支持片４３２の左右両端部、及び第２枠体３２に係る上枠部３２１の前面部３２ａに、この順に押し付ける。また、作業者は、粘着テープ５１を上下方向中央部で折り曲げ、粘着テープ５１の上半分を第２枠体３２に係る上枠部３２１の上面部３２ｂに押し付ける。以上の結果、光学シート４１，４２，４３の各被支持片４１２，４２２，４３２の積層体が、まとめて第２枠体３２に貼り付けられる。 The worker brings the adhesive surface of the adhesive tape 51 closer to the laminated body of the supported pieces 412, 422, 432 of the optical sheets 41, 42, 43 from the front side. At this time, the operator presses the left and right direction center portion of the lower half of the adhesive tape 51 against the supported piece 412, and the left and right side portions of the left and right direction center portion are connected to the left and right end portions of the supported piece 422. The left and right ends of 432 and the front surface 32a of the upper frame 321 associated with the second frame 32 are pressed in this order. The operator also bends the adhesive tape 51 at the center in the vertical direction and presses the upper half of the adhesive tape 51 against the upper surface portion 32 b of the upper frame portion 321 related to the second frame body 32. As a result, the laminated body of the supported pieces 412, 422, and 432 of the optical sheets 41, 42, and 43 is affixed together to the second frame body 32.
　粘着テープ５１によって、被支持片４１２，４２２，４３２夫々が第２枠体３２に貼り付けられるため、光学シート４１，４２，４３は夫々第２枠体３２に固定される。つまり、光学シート４１，４２，４３夫々が微小振動することが抑制される。 Since the supported pieces 412, 422, and 432 are attached to the second frame 32 by the adhesive tape 51, the optical sheets 41, 42, and 43 are fixed to the second frame 32, respectively. That is, the optical sheets 41, 42, and 43 are suppressed from being vibrated minutely.
　なお、粘着テープ５１は非透光性を有していてもよいが、透光性を有している方が作業性が高い。何故ならば、作業者が、粘着テープ５１を通して、粘着テープ５１が被支持片４１２，４２２，４３２夫々及び第２枠体３２の上枠部３２１に接着した様子を視認しながら作業を進めることができるからである。
　また、粘着テープ５１の枚数は１枚以上、Ｍ枚以下であればよい。例えば粘着テープ５１の枚数が３枚である場合、作業者は、左右方向中央部に位置する被支持片４１２，４２２，４３２の積層体１個と、左右両端部に位置する被支持片４１２，４２２，４３２の積層体各１個とを、第２枠体３２の上枠部３２１に貼り付けてもよい。また、例えば粘着テープ５１の枚数が１枚である場合、作業者は、左右方向中央部に位置する被支持片４１２，４２２，４３２の積層体１個を、第２枠体３２の上枠部３２１に貼り付けてもよい。 In addition, although the adhesive tape 51 may have non-light-transmitting property, the direction which has translucency has high workability | operativity. This is because the operator can proceed the work through the adhesive tape 51 while visually confirming that the adhesive tape 51 is adhered to each of the supported pieces 412, 422, 432 and the upper frame portion 321 of the second frame 32. Because it can.
The number of adhesive tapes 51 may be one or more and M or less. For example, when the number of the adhesive tapes 51 is three, the operator can use one laminated body of supported pieces 412, 422, and 432 positioned at the center in the left-right direction and supported pieces 412 positioned at the left and right ends. Each of the stacked bodies 422 and 432 may be attached to the upper frame portion 321 of the second frame body 32. Further, for example, when the number of the adhesive tapes 51 is one, the operator attaches one laminated body of the supported pieces 412, 422, and 432 located at the center in the left-right direction to the upper frame portion of the second frame 32. You may affix on 321.
　ところで、粘着テープ５１は位置決め突起３２５の先端部にも接着する。何故ならば、位置決め突起３２５の先端部が光学シート４１の被支持片４１２から正面側に突出しているからである。故に、粘着テープ５１が部分的に被支持片４１２から浮き上がる。このせいで粘着テープ５１の粘着面と被支持片４１２の前面との接着面積が不十分になる場合、作業者は、例えば、粘着テープ５１に貫通孔を形成し、この貫通孔に位置決め突起３２５の先端部を挿入してもよい。或いは、作業者は、被支持片４１２，４２２，４３２の積層体１個に対して左右２枚の粘着テープ５１，５１を用い、位置決め突起３２５の先端部を避けて粘着テープ５１，５１を被支持片４１２，４２２，４３２夫々に接触させてもよい。 Incidentally, the adhesive tape 51 is also bonded to the tip of the positioning protrusion 325. This is because the distal end portion of the positioning protrusion 325 protrudes from the supported piece 412 of the optical sheet 41 to the front side. Therefore, the adhesive tape 51 partially lifts from the supported piece 412. If the adhesion area between the adhesive surface of the adhesive tape 51 and the front surface of the supported piece 412 becomes insufficient due to this, for example, the operator forms a through hole in the adhesive tape 51 and the positioning protrusion 325 in this through hole. You may insert the front-end | tip part. Alternatively, the operator uses two left and right adhesive tapes 51, 51 for one laminated body of supported pieces 412, 422, 432, and avoids the tip of the positioning protrusion 325 to cover the adhesive tapes 51, 51. The support pieces 412, 422, and 432 may be brought into contact with each other.
　表示パネル２２は、第１枠体２１と、光学シート群３１が取り付けられた第２枠体３２との間で支持される。具体的には、表示パネル２２の額縁領域が、正面側に配された第１枠体２１と背面側に配された第２枠体３２とに、図示しない緩衝部材を介して挟持される。この結果、光学シート群３１は、表示パネル２２の表示領域を背面側から覆う。 The display panel 22 is supported between the first frame 21 and the second frame 32 to which the optical sheet group 31 is attached. Specifically, the frame area of the display panel 22 is sandwiched between the first frame body 21 arranged on the front side and the second frame body 32 arranged on the back side via a buffer member (not shown). As a result, the optical sheet group 31 covers the display area of the display panel 22 from the back side.
　導光板３３及び反射シート３４は、正面側に配された第２枠体３２と背面側に配された支持体３５１，３５２との間で支持される。具体的には、導光板３３の後面と反射シート３４の前面とが対面配置され、導光板３３及び反射シート３４の上辺部（又は下辺部）が、第２枠体３２の上枠部３２１と支持体３５１と（又は第２枠体３２の下枠部３２２と支持体３５２と）に、図示しない緩衝部材を介して挟持される。
　このとき、反射シート３４は導光板３３の後面を被覆する。従って、導光板３３の後面からの漏光は、反射シート３４にて反射し、再び導光板３３の内部に入射する。また、導光板３３は、表示パネル２２の表示領域を、光学シート群３１を介在して背面側から覆う。 The light guide plate 33 and the reflection sheet 34 are supported between the second frame 32 disposed on the front side and the supports 351 and 352 disposed on the back side. Specifically, the rear surface of the light guide plate 33 and the front surface of the reflection sheet 34 are arranged to face each other, and the upper side portion (or lower side portion) of the light guide plate 33 and the reflection sheet 34 is connected to the upper frame portion 321 of the second frame 32. It is sandwiched between the support body 351 (or the lower frame portion 322 and the support body 352 of the second frame body 32) via a buffer member (not shown).
At this time, the reflection sheet 34 covers the rear surface of the light guide plate 33. Accordingly, the light leakage from the rear surface of the light guide plate 33 is reflected by the reflection sheet 34 and enters the light guide plate 33 again. The light guide plate 33 covers the display area of the display panel 22 from the back side with the optical sheet group 31 interposed therebetween.
　ＢＬシャーシ２４は、第２枠体３２と支持体３５１，３５２とに支持された導光板３３及び反射シート３４、並びに光源部３６１，３６２及びヒートシンク３７１，３７２を収容する。この内、ヒートシンク３７１（又はヒートシンク３７２）と支持体３５１（又は支持体３５２）とは、ＢＬシャーシ２４の壁部２４１の上辺部（又は下辺部）に取り付けられる。光源部３６１（又は光源部３６２）は、ヒートシンク３７１（又はヒートシンク３７２）に取り付けられる。このとき、光源部３６１（又は光源部３６２）は、導光板３３の上端面（又は下端面）に、適長離隔して対向配置される。
　なお、光源部３６１，３６２は、導光板３３の左右両側端面に対向配置されている構成でもよい。また、光源部３６１，３６２の一方のみが備えられている構成でもよい。 The BL chassis 24 accommodates the light guide plate 33 and the reflection sheet 34 supported by the second frame 32 and the supports 351 and 352, the light source units 361 and 362, and the heat sinks 371 and 372. Among these, the heat sink 371 (or heat sink 372) and the support body 351 (or support body 352) are attached to the upper side part (or lower side part) of the wall part 241 of the BL chassis 24. The light source unit 361 (or light source unit 362) is attached to the heat sink 371 (or heat sink 372). At this time, the light source unit 361 (or the light source unit 362) is disposed to face the upper end surface (or the lower end surface) of the light guide plate 33 with an appropriate distance therebetween.
The light source units 361 and 362 may be configured to be opposed to the left and right side end surfaces of the light guide plate 33. Moreover, the structure provided only with one of the light source parts 361 and 362 may be sufficient.
　ＢＬシャーシ２４の壁部２４１の背面側には、受信部１２及び信号処理部１３が取り付けられる。
　ＢＬシャーシ２４の補強材２４２，２４３の下部には、スタンド１４の柱状部１４１，１４２が取り付けられる。 The receiving unit 12 and the signal processing unit 13 are attached to the back side of the wall 241 of the BL chassis 24.
The columnar portions 141 and 142 of the stand 14 are attached to the lower portions of the reinforcing members 242 and 243 of the BL chassis 24.
　次に、バックライトユニット２３による表示パネル２２の照明について説明する。
　光源部３６１，３６２が発した光は、導光板３３の上下両端面を透過して導光板３３の内部に入射する。
　導光板３３の内部に入射した光は、導光板３３の前面から出射する。導光板３３から出射した光は、光学シート群３１による拡散、集光、及び偏光を経て、表示パネル２２の後面を透過し、表示パネル２２の内部に入射する。
　以上のように、表示パネル２２は、バックライトユニット２３によって背面側から照明される。表示パネル２２の内部に入射した光は、表示パネル２２を透過するか、又は、表示パネル２２の通過を遮断される。この結果、表示パネル２２の表示領域に映像が表示される。 Next, illumination of the display panel 22 by the backlight unit 23 will be described.
The light emitted from the light source units 361 and 362 passes through the upper and lower end surfaces of the light guide plate 33 and enters the light guide plate 33.
Light incident on the inside of the light guide plate 33 is emitted from the front surface of the light guide plate 33. The light emitted from the light guide plate 33 is diffused, condensed, and polarized by the optical sheet group 31, passes through the rear surface of the display panel 22, and enters the display panel 22.
As described above, the display panel 22 is illuminated from the back side by the backlight unit 23. The light that has entered the display panel 22 passes through the display panel 22 or is blocked from passing through the display panel 22. As a result, an image is displayed in the display area of the display panel 22.
　ところで、光学シート群３１は、第２枠体３２に取り付けられる構成に限定されない。例えば、光学シート群３１は、第１枠体２１又はキャビネット１５等に取り付けられる構成でもよい。
　また、光学シート４１，４２，４３の各被支持片４１２，４２２，４３２は、横長さが同一で縦長さが異なる構成でもよい。この場合、被支持片４１２，４２２，４３２の積層体は、上端部側から下端部側に向けて高くなる縦長の階段状をなす。しかしながら、この場合、被支持片４１２，４２２，４３２の積層体を配置するために第２枠体３２に係る上枠部３２１の前面部３２ａの縦長さを長くする必要がある。故に、表示装置１１の狭額縁化が阻害され得る。 By the way, the optical sheet group 31 is not limited to the structure attached to the 2nd frame 32. FIG. For example, the optical sheet group 31 may be configured to be attached to the first frame body 21 or the cabinet 15 or the like.
Further, the supported pieces 412, 422, and 432 of the optical sheets 41, 42, and 43 may have the same horizontal length and different vertical lengths. In this case, the stacked body of the supported pieces 412, 422, and 432 has a vertically long staircase shape that increases from the upper end side toward the lower end side. However, in this case, in order to arrange the stacked body of the supported pieces 412, 422, and 432, it is necessary to increase the vertical length of the front surface portion 32 a of the upper frame portion 321 related to the second frame body 32. Therefore, narrowing of the frame of the display device 11 can be inhibited.
　次に、本実施の形態のバックライトユニット２３と従来のバックライトユニットとの差異について説明する。
　図７は、従来のバックライトユニットが備える光学シート４１，４２，４３の配置を模式的に示す水平断面図である。図７は、図５に対応する。
　本実施の形態のバックライトユニット２３と従来のバックライトユニットとは略同様の構成である。ただし、従来のバックライトユニットが備える光学シート４１，４２，４３は、本実施の形態の被支持片４１２，４２２，４３２に替えて、被支持片４１４，４２４，４３４を有する。 Next, the difference between the backlight unit 23 of the present embodiment and the conventional backlight unit will be described.
FIG. 7 is a horizontal cross-sectional view schematically showing the arrangement of optical sheets 41, 42, 43 provided in a conventional backlight unit. FIG. 7 corresponds to FIG.
The backlight unit 23 of the present embodiment and the conventional backlight unit have substantially the same configuration. However, the optical sheets 41, 42, and 43 provided in the conventional backlight unit have supported pieces 414, 424, and 434 in place of the supported pieces 412, 422, and 432 of the present embodiment.
　被支持片４１４は被支持片４１２に対応し、貫通孔４１３を有する。同様に、被支持片４２４，４３４は被支持片４２２，４３２に対応し、貫通孔４２３，４３３を有する。ところが、被支持片４１４，４２４，４３４夫々の縦横長さは互いに等しい。 The supported piece 414 corresponds to the supported piece 412 and has a through hole 413. Similarly, the supported pieces 424 and 434 correspond to the supported pieces 422 and 432 and have through holes 423 and 433. However, the vertical and horizontal lengths of the supported pieces 414, 424, and 434 are equal to each other.
　故に、被支持片４１４，４２４，４３４の積層体においては、被支持片４３４が被支持片４２４に全面的に被覆されてしまい、被支持片４２４が被支持片４１４に全面的に被覆されてしまう。このため、粘着テープ５１の粘着面は被支持片４１４の前面には十分に接着するが、被支持片４２４，４３４の何れに対してもほとんど接着しない。このため、被支持片４１４を第２枠体３２の上枠部３２１に貼り付けることはできるが、被支持片４２４，４３４を第２枠体３２の上枠部３２１に貼り付けることはできない。つまり、光学シート４１は第２枠体３２の上枠部３２１に固定されるが、光学シート４２，４３は固定されず、微小振動可能な状態のままである。 Therefore, in the laminated body of the supported pieces 414, 424, 434, the supported piece 434 is entirely covered with the supported piece 424, and the supported piece 424 is entirely covered with the supported piece 414. End up. For this reason, the adhesive surface of the adhesive tape 51 adheres sufficiently to the front surface of the supported piece 414, but hardly adheres to any of the supported pieces 424 and 434. For this reason, the supported piece 414 can be attached to the upper frame portion 321 of the second frame 32, but the supported pieces 424 and 434 cannot be attached to the upper frame portion 321 of the second frame 32. In other words, the optical sheet 41 is fixed to the upper frame portion 321 of the second frame 32, but the optical sheets 42 and 43 are not fixed and remain in a state that allows minute vibrations.
　このため、例えばテレビジョン受信機１に対する振動試験が行われた場合、従来のバックライトユニットにおいては、テレビジョン受信機１の振動に伴って光学シート４２，４３が微小振動する。このとき、光学シート４１，４２，４３が互いに擦り合わされて、これらの表面が損傷する虞がある。また、光学シート４１と表示パネル２２とが接近配置又は接触配置されていれば、表示パネル２２に擦り合わされた光学シート４１の前面が損傷する虞がある。更に、光学シート４３と導光板３３とが接近配置又は接触配置されていれば、互いに擦り合わされた光学シート４３の後面と導光板３３の前面とが損傷する虞がある。
　光学シート４１，４２，４３又は導光板３３の損傷は、光の無用な散乱の原因となる。即ち、光学シート４１，４２，４３又は導光板３３の光学的機能が劣化する。 For this reason, for example, when a vibration test is performed on the television receiver 1, in the conventional backlight unit, the optical sheets 42 and 43 vibrate slightly with the vibration of the television receiver 1. At this time, the optical sheets 41, 42, and 43 may be rubbed against each other and their surfaces may be damaged. Further, if the optical sheet 41 and the display panel 22 are arranged close to each other or in contact with each other, the front surface of the optical sheet 41 rubbed against the display panel 22 may be damaged. Furthermore, if the optical sheet 43 and the light guide plate 33 are disposed close to or in contact with each other, the rear surface of the optical sheet 43 and the front surface of the light guide plate 33 that are rubbed together may be damaged.
Damage to the optical sheets 41, 42, 43 or the light guide plate 33 causes unnecessary light scattering. That is, the optical function of the optical sheets 41, 42, 43 or the light guide plate 33 is deteriorated.
　このような不都合を解消するために、従来のバックライトユニットにおいて、被支持片４１４，４２４，４３４に対して３枚の両面テープを用いることが考えられる。具体的には、作業者は第１の両面テープを用いて被支持片４３４の後面を第２枠体３２の上枠部３２１に貼り付け、更に第２の両面テープを用いて被支持片４２４の後面を被支持片４３４の前面に貼り付け、更にまた第３の両面テープを用いて被支持片４１４の後面を被支持片４２４の前面に貼り付ける。
　この場合、光学シート４１，４２，４３の微小振動は抑制されるが、３枚の両面テープを用いた貼り付け作業は煩雑である。しかも、積層された両面テープ３枚分の厚みが表示装置１１の薄型化を阻害する虞がある。 In order to eliminate such inconvenience, it is conceivable to use three double-sided tapes for the supported pieces 414, 424, 434 in the conventional backlight unit. Specifically, the operator attaches the rear surface of the supported piece 434 to the upper frame portion 321 of the second frame 32 using the first double-sided tape, and further uses the second double-sided tape to support the supported piece 424. The rear surface is attached to the front surface of the supported piece 434, and the rear surface of the supported piece 414 is attached to the front surface of the supported piece 424 using a third double-sided tape.
In this case, the minute vibrations of the optical sheets 41, 42, and 43 are suppressed, but the affixing operation using the three double-sided tapes is complicated. Moreover, the thickness of the three laminated double-sided tapes may hinder the thinning of the display device 11.
　一方、本実施の形態のバックライトユニット２３においては、光学シート４１，４２，４３夫々の微小振動が、被支持片４１２，４２２，４３２の積層体１個に対して１枚の粘着テープ５１を用いることによって抑制されている。このため、光学シート４１，４２，４３の微小振動に起因する光学シート４１，４２，４３又は導光板３３の損傷が抑制されている。つまり、光学シート４１，４２，４３又は導光板３３の光学的機能の劣化が抑制されている。また、１枚の粘着テープ５１を用いた貼り付け作業は簡易である。更に、粘着テープ５１の厚みが表示装置１１の薄型化を阻害する虞はない。 On the other hand, in the backlight unit 23 of the present embodiment, the micro vibration of each of the optical sheets 41, 42, 43 causes one adhesive tape 51 to be attached to one laminated body of the supported pieces 412, 422, 432. It is suppressed by using. For this reason, damage to the optical sheets 41, 42, 43 or the light guide plate 33 due to minute vibrations of the optical sheets 41, 42, 43 is suppressed. That is, the deterioration of the optical function of the optical sheets 41, 42, 43 or the light guide plate 33 is suppressed. Further, the pasting operation using the single adhesive tape 51 is simple. Furthermore, there is no possibility that the thickness of the adhesive tape 51 hinders the thinning of the display device 11.
（実施の形態　２．）
　図８は、本発明の実施の形態２に係る照明装置としてのバックライトユニット２３が備える光学シート４１，４２，４３の配置を模式的に示す水平断面図である。図８は、図５に対応する。
　本実施の形態の表示装置１１は、実施の形態１の表示装置１１と略同様の構成である。以下では、実施の形態１との差異について説明し、その他、実施の形態１に対応する部分には同一符号を付してそれらの説明を省略する。
　本実施の形態の光学シート４１，４２，４３は、実施の形態１の被支持片４１２，４２２，４３２及び粘着テープ５１に替えて、被支持片４１５，４２５，４３５及び粘着テープ５２を有する。 (Embodiment 2.)
FIG. 8 is a horizontal sectional view schematically showing the arrangement of the optical sheets 41, 42, 43 provided in the backlight unit 23 as the illumination device according to Embodiment 2 of the present invention. FIG. 8 corresponds to FIG.
The display device 11 of the present embodiment has substantially the same configuration as the display device 11 of the first embodiment. Hereinafter, differences from the first embodiment will be described, and other parts corresponding to those of the first embodiment are denoted by the same reference numerals and description thereof will be omitted.
The optical sheets 41, 42 and 43 of the present embodiment have supported pieces 415, 425, 435 and an adhesive tape 52 instead of the supported pieces 412, 422, 432 and the adhesive tape 51 of the first embodiment.
　被支持片４１５は被支持片４１２に対応し、貫通孔４１３を有する。同様に、被支持片４２５，４３５は被支持片４２２，４３２に対応し、貫通孔４２３，４３３を有する。
　ただし、光学シート４２の被支持片４２５は、光学シート４１の被支持片４１５よりも面積が小さく、光学シート４３の被支持片４３５は、光学シート４２の被支持片４２５よりも面積が小さい。このために、被支持片４２５の横長さは、被支持片４１５の横長さよりも短く、被支持片４３５の横長さは、被支持片４２５の横長さよりも短くしてある。一方、被支持片４１５，４２５，４３５夫々の縦長さは同一である。 The supported piece 415 corresponds to the supported piece 412 and has a through hole 413. Similarly, the supported pieces 425 and 435 correspond to the supported pieces 422 and 432 and have through holes 423 and 433.
However, the supported piece 425 of the optical sheet 42 has a smaller area than the supported piece 415 of the optical sheet 41, and the supported piece 435 of the optical sheet 43 has a smaller area than the supported piece 425 of the optical sheet 42. For this reason, the lateral length of the supported piece 425 is shorter than the lateral length of the supported piece 415, and the lateral length of the supported piece 435 is shorter than the lateral length of the supported piece 425. On the other hand, the longitudinal lengths of the supported pieces 415, 425, and 435 are the same.
　つまり、互いに対応するＮ枚の被支持片４１５，４２５，４３５は、夫々の面積が積層方向に順に増大する。即ち、正面側に積層されるものほど面積が大きい。
　各粘着テープ５２は耐熱性を有し、左右方向に長い矩形状の両面テープである。粘着テープ５２の上下左右方向の中央部には貫通孔５２１が形成されている。粘着テープ５２の縦長さは、第２枠体３２に係る上枠部３２１の前面部３２ａの縦長さと同程度である。 That is, the areas of the N supported pieces 415, 425, and 435 corresponding to each other sequentially increase in the stacking direction. That is, the area laminated on the front side is larger.
Each adhesive tape 52 is a rectangular double-sided tape that has heat resistance and is long in the left-right direction. A through-hole 521 is formed in the center of the adhesive tape 52 in the vertical and horizontal directions. The longitudinal length of the adhesive tape 52 is approximately the same as the longitudinal length of the front surface portion 32 a of the upper frame portion 321 according to the second frame body 32.
　作業者は、粘着テープ５２の貫通孔５２１に第２枠体３２の上枠部３２１の位置決め突起３２５を挿通して、粘着テープ５２の背面側の粘着面を第２枠体３２に係る上枠部３２１の前面部３２ａに接着する。
　次に、作業者は、光学シート４３の被支持片４３５の貫通孔４３３に位置決め突起３２５を挿通して、被支持片４３５の後面を粘着テープ５２の正面側の粘着面に押し付ける。
　次いで、作業者は、光学シート４２の被支持片４２５の貫通孔４２３に位置決め突起３２５を挿通して、被支持片４２５の後面の左右両端部を粘着テープ５２の正面側の粘着面に押し付ける。このとき、被支持片４２５の後面の左右方向中央部は、被支持片４３５の前面に接触するため粘着テープ５２には接触しない。 The operator inserts the positioning protrusion 325 of the upper frame portion 321 of the second frame 32 into the through hole 521 of the adhesive tape 52, and the adhesive surface on the back side of the adhesive tape 52 is the upper frame related to the second frame 32. It adheres to the front part 32a of the part 321.
Next, the operator inserts the positioning protrusion 325 into the through hole 433 of the supported piece 435 of the optical sheet 43 and presses the rear surface of the supported piece 435 against the adhesive surface on the front side of the adhesive tape 52.
Next, the operator inserts the positioning projection 325 into the through hole 423 of the supported piece 425 of the optical sheet 42 and presses the left and right ends of the rear surface of the supported piece 425 against the adhesive surface on the front side of the adhesive tape 52. At this time, the central portion of the rear surface of the supported piece 425 in the left-right direction is in contact with the front surface of the supported piece 435 and does not contact the adhesive tape 52.
　次に、作業者は、光学シート４１の被支持片４１５の貫通孔４１３に位置決め突起３２５を挿通して、被支持片４１５の後面の左右両端部を粘着テープ５２の正面側の粘着面に押し付ける。このとき、被支持片４１５の後面の左右方向中央部は、被支持片４２５の前面に接触するため粘着テープ５２には接触しない。
　以上の結果、光学シート４１，４２，４３の各被支持片４１５，４２５，４３５の積層体が、まとめて第２枠体３２に貼り付けられる。 Next, the operator inserts the positioning protrusion 325 into the through hole 413 of the supported piece 415 of the optical sheet 41 and presses the left and right ends of the rear surface of the supported piece 415 against the adhesive surface on the front side of the adhesive tape 52. . At this time, the central portion of the rear surface of the supported piece 415 in the left-right direction is in contact with the front surface of the supported piece 425 and is not in contact with the adhesive tape 52.
As a result, the laminated body of the supported pieces 415, 425, and 435 of the optical sheets 41, 42, and 43 is collectively attached to the second frame 32.
　このとき、光学シート４１，４２，４３は第２枠体３２に対して位置決めされ、第２枠体３２の正面側にて積層配置されて、第２枠体３２の上枠部３２１から吊り下げられる。且つ、光学シート４１，４２，４３は夫々第２枠体３２に固定される。つまり、光学シート４１，４２，４３夫々が微小振動することが抑制される。 At this time, the optical sheets 41, 42, and 43 are positioned with respect to the second frame 32, are stacked on the front side of the second frame 32, and are suspended from the upper frame portion 321 of the second frame 32. It is done. In addition, the optical sheets 41, 42, and 43 are fixed to the second frame 32, respectively. That is, the optical sheets 41, 42, and 43 are suppressed from being vibrated minutely.
（実施の形態　３．）
　図９は、本発明の実施の形態３に係る照明装置としてのバックライトユニット２３が備える光学シート４１，４２，４３の配置を模式的に示す水平断面図である。ただし、粘着テープ５１の図示は省略してある。
　本実施の形態の表示装置１１は、実施の形態１の表示装置１１と略同様の構成である。以下では、実施の形態１との差異について説明し、その他、実施の形態１に対応する部分には同一符号を付してそれらの説明を省略する。
　本実施の形態では、Ｍ＝３である。
　第２枠体３２の下枠部３２２には、上枠部３２１の位置決め突起３２５と同様の位置決め突起３２６が設けられている。位置決め突起３２６は、下枠部３２２の左右方向中央部に配されている。 (Embodiment 3.)
FIG. 9 is a horizontal cross-sectional view schematically showing the arrangement of the optical sheets 41, 42, 43 provided in the backlight unit 23 as the illumination device according to Embodiment 3 of the present invention. However, the illustration of the adhesive tape 51 is omitted.
The display device 11 of the present embodiment has substantially the same configuration as the display device 11 of the first embodiment. Hereinafter, differences from the first embodiment will be described, and other parts corresponding to those of the first embodiment are denoted by the same reference numerals and description thereof will be omitted.
In the present embodiment, M = 3.
A positioning projection 326 similar to the positioning projection 325 of the upper frame portion 321 is provided on the lower frame portion 322 of the second frame body 32. The positioning protrusion 326 is arranged at the center in the left-right direction of the lower frame portion 322.
　光学シート４１は、被支持片４１２，４１２，…の他に、被支持片４１６を有する。被支持片４１６はシート本体４１１に対して面一であり、シート本体４１１の下辺部に突設されている。被支持片４１６の上下左右方向中心位置には、貫通孔４１３と同様の貫通孔が形成してある。
　同様に、光学シート４２，４３は、被支持片４２６，４３６を有する。被支持片４２６，４３６夫々の上下左右方向中心位置には、貫通孔４２３，４３３と同様の貫通孔が形成してある。
　被支持片４１６，４２６，４３６は、夫々の貫通孔が位置決め突起３２６に挿通されることによって、被支持片４１２，４２２，４３２と同様に、第２枠体３２に対する光学シート４１，４２，４３の位置決め及び取り付けに寄与する。 The optical sheet 41 has a supported piece 416 in addition to the supported pieces 412, 412,. The supported piece 416 is flush with the sheet body 411 and protrudes from the lower side of the sheet body 411. A through hole similar to the through hole 413 is formed at the center position of the supported piece 416 in the vertical and horizontal directions.
Similarly, the optical sheets 42 and 43 have supported pieces 426 and 436. Through holes similar to the through holes 423 and 433 are formed at the center positions of the supported pieces 426 and 436 in the vertical and horizontal directions.
The supported pieces 416, 426, 436 are inserted into the positioning projections 326 through the respective through holes, so that the optical sheets 41, 42, 43 with respect to the second frame 32 are provided in the same manner as the supported pieces 412, 422, 432. This contributes to the positioning and mounting.
　被支持片４１６，４２６，４３６の積層体も、被支持片４１２，４２２，４３２の積層体と同様に階段状をなす。このため、粘着テープ５１を用いて被支持片４１６，４２６，４３６の積層体を第２枠体３２の下枠部３２２に貼り付ければ、光学シート４１，４２，４３夫々の微小振動を更に確実に抑制することができる。 The laminated body of the supported pieces 416, 426, and 436 also has a step shape like the laminated body of the supported pieces 412, 422, and 432. For this reason, if the laminated body of the supported pieces 416, 426, and 436 is attached to the lower frame portion 322 of the second frame body 32 using the adhesive tape 51, the minute vibrations of the optical sheets 41, 42, and 43 can be more reliably ensured. Can be suppressed.
　本発明の実施の形態における各光学シートが有する被支持片は、光学シートの上部に設けられる構成に限定されず、下部、又は左右両側部等に設けられていてもよい。
　また、貫通孔が形成されておらず、位置決めに寄与しない被支持片が設けられていてもよい。この被支持片は、粘着テープを用いて支持部材に貼り付けられる。この場合、貫通孔が形成されており、位置決めに寄与する被支持片は支持部材に貼り付けられない構成でもよい。 The supported pieces of each optical sheet in the embodiment of the present invention are not limited to the configuration provided in the upper part of the optical sheet, and may be provided in the lower part, the left and right side parts, or the like.
Moreover, the through-hole is not formed and the to-be-supported piece which does not contribute to positioning may be provided. This supported piece is affixed to a support member using an adhesive tape. In this case, the through hole is formed, and the supported piece that contributes to positioning may not be attached to the support member.
　本発明の実施の形態に係る表示装置は、テレビジョン受信機１として構成されている表示装置１１に限定されず、電子看板、又は、パーソナルコンピュータ用のモニタ等として構成されていてもよい。
　本発明の実施の形態に係る照明装置は、表示装置１１に組み込まれるバックライトユニット２３のようなものに限定されない。例えば、照明装置は、携帯電話機又は携帯情報端末装置等が備える表示部のバックライトユニットとして構成されていてもよい。或いは、照明装置は、シーリングライト又は壁掛け照明器具等として構成されていてもよい。シーリングライトとして構成されている場合、例えば導光板が正面を下向きにして横姿勢で配されていてもよい。 The display device according to the embodiment of the present invention is not limited to the display device 11 configured as the television receiver 1, and may be configured as an electronic signboard, a monitor for a personal computer, or the like.
The illumination device according to the embodiment of the present invention is not limited to the backlight unit 23 incorporated in the display device 11. For example, the lighting device may be configured as a backlight unit of a display unit included in a mobile phone or a portable information terminal device. Alternatively, the lighting device may be configured as a ceiling light or a wall-mounted lighting fixture. When configured as a ceiling light, for example, the light guide plate may be arranged in a horizontal posture with the front face downward.
　最後に、本発明の実施の形態についてまとめる。 Finally, the embodiment of the present invention will be summarized.
　本発明に係るバックライトユニット２３は、光源部３６１，３６２が発した光を正面から出射する導光板３３と、該導光板３３の前記正面の側にて積層配置されているＮ（Ｎは複数）枚の光学シート４１，４２，４３と、該Ｎ枚の光学シート４１，４２，４３を支持する上枠部３２１とを備えるバックライトユニット２３において、前記Ｎ枚の光学シート４１，４２，４３夫々の周縁部における互いに対応する位置に、夫々の面積を積層方向に順に減少してある被支持片４１２，４２２，４３２（被支持片４１５，４２５，４３５、又は被支持片４１６，４２６，４３６）が設けられており、前記Ｎ枚の光学シート４１，４２，４３の互いに対応するＮ枚の被支持片４１２，４２２，４３２（被支持片４１５，４２５，４３５、又は被支持片４１６，４２６，４３６）を前記上枠部３２１に貼り付ける粘着テープ５１（粘着テープ５２）を備えることを特徴とする。 The backlight unit 23 according to the present invention includes a light guide plate 33 that emits light emitted from the light source units 361 and 362 from the front, and N (N is a plurality of layers) arranged on the front side of the light guide plate 33. ) In the backlight unit 23 including the optical sheets 41, 42, and 43 and the upper frame portion 321 that supports the N optical sheets 41, 42, and 43, the N optical sheets 41, 42, and 43 are provided. The supported pieces 412, 422, 432 (supported pieces 415, 425, 435, or supported pieces 416, 426, 436, which are respectively reduced in order in the stacking direction at positions corresponding to each other in the respective peripheral portions. ) And the N pieces of supported pieces 412, 422, 432 (supported pieces 415, 425, 435, or supported pieces) of the N optical sheets 41, 42, 43 corresponding to each other. The 416,426,436), characterized in that it comprises an adhesive tape 51 (an adhesive tape 52) pasted on said frame portion 321.
　本発明に係るバックライトユニット２３は、光源部３６１，３６２が発した光を正面から出射する導光板３３と、該導光板３３の前記正面の側にて積層配置されているＮ（Ｎは複数）枚の光学シート４１，４２，４３と、該Ｎ枚の光学シート４１，４２，４３を支持する上枠部３２１とを備えるバックライトユニット２３において、前記Ｎ枚の光学シート４１，４２，４３夫々の周縁部における互いに対応する位置に、夫々の面積を積層方向に順に増大してある被支持片４１２，４２２，４３２（被支持片４１５，４２５，４３５、又は被支持片４１６，４２６，４３６）が設けられており、前記Ｎ枚の光学シート４１，４２，４３の互いに対応するＮ枚の被支持片４１２，４２２，４３２（被支持片４１５，４２５，４３５、又は被支持片４１６，４２６，４３６）を前記上枠部３２１に貼り付ける粘着テープ５１（粘着テープ５２）を備えることを特徴とする。 The backlight unit 23 according to the present invention includes a light guide plate 33 that emits light emitted from the light source units 361 and 362 from the front, and N (N is a plurality of layers) arranged on the front side of the light guide plate 33. ) In the backlight unit 23 including the optical sheets 41, 42, and 43 and the upper frame portion 321 that supports the N optical sheets 41, 42, and 43, the N optical sheets 41, 42, and 43 are provided. The supported pieces 412, 422, 432 (supported pieces 415, 425, 435, or supported pieces 416, 426, 436, which have respective areas sequentially increasing in the stacking direction at positions corresponding to each other in the respective peripheral portions. ) And the N pieces of supported pieces 412, 422, 432 (supported pieces 415, 425, 435, or supported pieces) of the N optical sheets 41, 42, 43 corresponding to each other. The 416,426,436) characterized in that it comprises an adhesive tape 51 (an adhesive tape 52) pasted on said frame portion 321.
　本発明に係るバックライトユニット２３は、前記上枠部３２１は、前記Ｎ枚の被支持片４１２，４２２，４３２（被支持片４１６，４２６，４３６）よりも前記積層方向の一側に配されており、前記Ｎ枚の被支持片４１２，４２２，４３２（被支持片４１６，４２６，４３６）は、前記上枠部３２１に近いものほど面積が大きく、前記粘着テープ５１は、前記積層方向の他側から前記Ｎ枚の被支持片４１２，４２２，４３２（被支持片４１６，４２６，４３６）を前記上枠部３２１に貼り付けていることを特徴とする。 In the backlight unit 23 according to the present invention, the upper frame portion 321 is disposed on one side in the stacking direction with respect to the N supported pieces 412, 422, 432 (supported pieces 416, 426, 436). The N pieces of supported pieces 412, 422, 432 (supported pieces 416, 426, 436) have a larger area as they are closer to the upper frame portion 321, and the adhesive tape 51 is arranged in the stacking direction. The N supported pieces 412, 422, 432 (supported pieces 416, 426, 436) are attached to the upper frame portion 321 from the other side.
　本発明に係るバックライトユニット２３は、前記Ｎ枚の被支持片４１２，４２２，４３２（被支持片４１５，４２５，４３５、又は被支持片４１６，４２６，４３６）は、面積が大きい被支持片４１２，４２２，４３２（被支持片４１５，４２５，４３５、又は被支持片４１６，４２６，４３６）ほど、前記光学シート４１，４２，４３の周縁方向の長さが長いことを特徴とする。 In the backlight unit 23 according to the present invention, the N pieces of supported pieces 412, 422, 432 (supported pieces 415, 425, 435, or supported pieces 416, 426, 436) are supported pieces having a large area. 412, 422, 432 (supported pieces 415, 425, 435 or supported pieces 416, 426, 436) are characterized in that the length of the optical sheets 41, 42, 43 in the peripheral direction is longer.
　本発明に係るバックライトユニット２３は、前記Ｎ枚の被支持片４１２，４２２，４３２（被支持片４１５，４２５，４３５、又は被支持片４１６，４２６，４３６）夫々の対応する位置には貫通孔４１３，４２３，４３３が形成してあり、前記上枠部３２１には、前記Ｎ枚の被支持片４１２，４２２，４３２（被支持片４１５，４２５，４３５、又は被支持片４１６，４２６，４３６）の貫通孔４１３，４２３，４３３に挿入される位置決め突起３２５（又は位置決め突起３２６）が設けられていることを特徴とする。 The backlight unit 23 according to the present invention penetrates through the corresponding positions of the N supported pieces 412, 422, 432 (supported pieces 415, 425, 435, or supported pieces 416, 426, 436). Holes 413, 423, 433 are formed, and the upper frame portion 321 has the N pieces of supported pieces 412, 422, 432 (supported pieces 415, 425, 435, or supported pieces 416, 426, 436) is provided with positioning protrusions 325 (or positioning protrusions 326) to be inserted into the through holes 413, 423, 433.
　本発明に係る表示装置１１は、本発明に係るバックライトユニット２３と、該バックライトユニット２３によって背面側から照明される表示パネル２２とを備えることを特徴とする。 The display device 11 according to the present invention includes the backlight unit 23 according to the present invention and a display panel 22 illuminated from the back side by the backlight unit 23.
　本発明に係るテレビジョン受信機１は、本発明に係る表示装置１１と、テレビジョン放送を受信する受信部１２とを備え、該受信部１２にて受信したテレビジョン放送に基づいて、前記表示装置１１に映像を表示するようにしてあることを特徴とする。 A television receiver 1 according to the present invention includes a display device 11 according to the present invention and a receiving unit 12 that receives a television broadcast, and the display is based on the television broadcast received by the receiving unit 12. An image is displayed on the device 11.
　本発明にあっては、粘着テープが、Ｎ枚の被支持片をまとめて支持部材に貼り付ける。
　積層方向の一側の被支持片は、積層方向の他側の被支持片よりも面積が大きい。故に、積層されたＮ枚の被支持片は、階段状に配される。このとき、積層方向の他側の被支持片は、積層方向の一側の被支持片の一部を被覆し、残部を被覆しない。従って、Ｎ枚の被支持片よりも積層方向の他側に粘着テープを配置すれば、各被支持片における他の被支持片に被覆されていない部分が、粘着テープに十分に接着する。 In the present invention, the adhesive tape collectively attaches the N supported pieces to the support member.
The supported piece on one side in the stacking direction has a larger area than the supported piece on the other side in the stacking direction. Therefore, the stacked N supported pieces are arranged stepwise. At this time, the supported piece on the other side in the stacking direction covers a part of the supported piece on one side in the stacking direction and does not cover the remaining part. Therefore, if the adhesive tape is arranged on the other side in the stacking direction with respect to the N pieces of supported pieces, the portion of each supported piece that is not covered with the other supported pieces is sufficiently adhered to the adhesive tape.
　本発明にあっては、積層方向の一側から他側に向けて、支持部材、被支持片、この被支持片よりも面積が小さい被支持片、…、この被支持片よりも面積が小さい被支持片、及び粘着テープ（例えば被支持片側に粘着面を有する片面テープ）の順に配されている。そして、粘着テープが、Ｎ枚の被支持片をまとめて支持部材に貼り付ける。
　以上の場合、照明装置を製造する作業者は、粘着テープとＮ枚の被支持片夫々の少なくとも一部とを視認しながら、粘着テープを用いた貼り付け作業を行なうことができる。故に、作業性を向上させることができる。 In the present invention, from one side of the stacking direction to the other side, the support member, the supported piece, the supported piece having a smaller area than the supported piece,..., The area is smaller than the supported piece. A supported piece and an adhesive tape (for example, a single-sided tape having an adhesive surface on the supported piece side) are arranged in this order. Then, the adhesive tape collectively pastes the N supported pieces onto the support member.
In the above case, the worker who manufactures the lighting device can perform the attaching operation using the adhesive tape while visually recognizing the adhesive tape and at least a part of each of the N supported pieces. Therefore, workability can be improved.
　本発明にあっては、面積が大きい被支持片ほど、光学シートの周縁方向の長さが長い。故に、Ｎ枚の被支持片は、光学シートの周縁方向に長い階段状に配される。このため、粘着テープの長手方向を光学シートの周縁方向に配することができる。この場合、粘着テープの長手方向を光学シートの周縁方向に交差する方向に配する場合に比べて、表示装置の狭額縁化を促進することができる。 In the present invention, the supported piece having a larger area has a longer length in the peripheral direction of the optical sheet. Therefore, the N supported pieces are arranged in a long step shape in the peripheral direction of the optical sheet. For this reason, the longitudinal direction of the adhesive tape can be arranged in the peripheral direction of the optical sheet. In this case, compared with the case where the longitudinal direction of the adhesive tape is arranged in a direction intersecting with the peripheral direction of the optical sheet, it is possible to promote narrowing of the display device.
　本発明にあっては、支持部材の位置決め突起を各被支持片の貫通孔に挿入することによって、各光学シートを支持部材に対して位置決めすることができる。
　Ｎ枚の光学シートを位置決めしてから粘着テープを用いてＮ枚の被支持片を支持部材に貼り付ければ、貼り付け作業時に各光学シートが位置ズレしてしまうことを抑制することができる。 In the present invention, each optical sheet can be positioned with respect to the support member by inserting the positioning protrusion of the support member into the through hole of each supported piece.
If the N optical sheets are positioned and then N pieces of supported pieces are attached to the support member using an adhesive tape, it is possible to prevent the optical sheets from being misaligned during the attaching operation.
　今回開示された実施の形態は、全ての点で例示であって、制限的なものではないと考えられるべきである。本発明の範囲は、上述した意味ではなく、請求の範囲と均等の意味及び請求の範囲内での全ての変更が含まれることが意図される。
　また、本発明の効果がある限りにおいて、表示装置１１又はバックライトユニット２３に、実施の形態１～３に開示されていない構成要素が含まれていてもよい。
　各実施の形態に開示されている構成要件（技術的特徴）はお互いに組み合わせ可能であり、組み合わせによって新しい技術的特徴を形成することができる。 The embodiment disclosed this time is to be considered as illustrative in all points and not restrictive. The scope of the present invention is not intended to include the above-described meaning, but is intended to include meanings equivalent to the scope of the claims and all modifications within the scope of the claims.
In addition, as long as the effect of the present invention is obtained, the display device 11 or the backlight unit 23 may include components that are not disclosed in the first to third embodiments.
The constituent elements (technical features) disclosed in each embodiment can be combined with each other, and a new technical feature can be formed by the combination.
　１１　表示装置
　２２　表示パネル
　２３　バックライトユニット（照明装置）
　３２１　上枠部（支持部材）
　３２５　位置決め突起
　３３　導光板
　３６１，３６２　光源部
　４１，４２，４３　光学シート
　４１２，４２２，４３２　被支持片
　４１３，４２３，４３３　貫通孔
　５１，５２　粘着テープ 11 Display device 22 Display panel 23 Backlight unit (lighting device)
321 Upper frame (support member)
325 Positioning protrusion 33 Light guide plate 361,362 Light source part 41,42,43 Optical sheet 412,422,432 Supported piece 413,423,433 Through hole 51,52 Adhesive tape

Claims (6)

  1. 　光源部が発した光を一面から出射する導光板と、
    　該導光板の前記一面の側にて積層配置されているＮ（Ｎは複数）枚の光学シートと、
    　該Ｎ枚の光学シートを支持する支持部材と
    　を備える照明装置において、
    　前記Ｎ枚の光学シート夫々の周縁部における互いに対応する位置に、夫々の面積を積層方向に順に減少してある被支持片が設けられており、
    　前記Ｎ枚の光学シートの互いに対応するＮ枚の被支持片を前記支持部材に貼り付ける粘着テープを備えることを特徴とする照明装置。     A light guide plate that emits light emitted from the light source unit from one surface;
    N (N is a plurality) optical sheets stacked on the one surface side of the light guide plate;
    A lighting device comprising: a support member that supports the N optical sheets;
    At the positions corresponding to each other in the peripheral portion of each of the N optical sheets, supported pieces having respective areas sequentially reduced in the stacking direction are provided,
    An illuminating device comprising: an adhesive tape for affixing N supported pieces of the N optical sheets corresponding to each other to the support member.
  2. 　光源部が発した光を一面から出射する導光板と、
    　該導光板の前記一面の側にて積層配置されているＮ（Ｎは複数）枚の光学シートと、
    　該Ｎ枚の光学シートを支持する支持部材と
    　を備える照明装置において、
    　前記Ｎ枚の光学シート夫々の周縁部における互いに対応する位置に、夫々の面積を積層方向に順に増大してある被支持片が設けられており、
    　前記Ｎ枚の光学シートの互いに対応するＮ枚の被支持片を前記支持部材に貼り付ける粘着テープを備えることを特徴とする照明装置。     A light guide plate that emits light emitted from the light source unit from one surface;
    N (N is a plurality) optical sheets stacked on the one surface side of the light guide plate;
    A lighting device comprising: a support member that supports the N optical sheets;
    At the positions corresponding to each other in the peripheral portion of each of the N optical sheets, supported pieces whose respective areas are sequentially increased in the stacking direction are provided,
    An illuminating device comprising: an adhesive tape for affixing N supported pieces of the N optical sheets corresponding to each other to the support member.
  3. 　前記支持部材は、前記Ｎ枚の被支持片よりも前記積層方向の一側に配されており、
    　前記Ｎ枚の被支持片は、前記支持部材に近いものほど面積が大きく、
    　前記粘着テープは、前記積層方向の他側から前記Ｎ枚の被支持片を前記支持部材に貼り付けていることを特徴とする請求項１又は２に記載の照明装置。     The support member is arranged on one side of the stacking direction with respect to the N supported pieces,
    The N pieces to be supported have a larger area closer to the support member,
    The lighting device according to claim 1, wherein the adhesive tape has the N pieces to be supported attached to the support member from the other side in the stacking direction.
  4. 　前記Ｎ枚の被支持片は、面積が大きい被支持片ほど、前記光学シートの周縁方向の長さが長いことを特徴とする請求項１から３の何れかひとつに記載の照明装置。 4. The illumination device according to claim 1, wherein the N pieces to be supported have a longer length in the peripheral direction of the optical sheet as the supported piece has a larger area.
  5. 　前記Ｎ枚の被支持片夫々の対応する位置には貫通孔が形成してあり、
    　前記支持部材には、前記Ｎ枚の被支持片の貫通孔に挿入される位置決め突起が設けられていることを特徴とする請求項１から４の何れかひとつに記載の照明装置。     A through hole is formed at a corresponding position of each of the N supported pieces,
    5. The lighting device according to claim 1, wherein the support member is provided with a positioning protrusion to be inserted into a through hole of the N pieces to be supported.
  6. 　請求項１から５の何れかひとつに記載の照明装置と、
    　該照明装置によって背面側から照明される表示パネルと
    　を備えることを特徴とする表示装置。
          A lighting device according to any one of claims 1 to 5;
    A display panel illuminated from the back side by the illumination device.
PCT/JP2014/079342 2013-11-06 2014-11-05 Illumination device and display device WO2015068729A1 (en)

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CN205334014U (en) 2016-01-04 2016-06-22 京东方光科技有限公司 Sticky tape, backlight unit and display device

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