WO2015008362A1 - 光源装置及び表示装置 - Google Patents
光源装置及び表示装置 Download PDFInfo
- Publication number
- WO2015008362A1 WO2015008362A1 PCT/JP2013/069514 JP2013069514W WO2015008362A1 WO 2015008362 A1 WO2015008362 A1 WO 2015008362A1 JP 2013069514 W JP2013069514 W JP 2013069514W WO 2015008362 A1 WO2015008362 A1 WO 2015008362A1
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- WO
- WIPO (PCT)
- Prior art keywords
- guide plate
- light guide
- light source
- light
- source device
- Prior art date
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Classifications
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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
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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
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
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- 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
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- 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
- G02F2201/54—Arrangements for reducing warping-twist
Definitions
- the present invention provides a light source device including a reflective sheet that is penetrated by a projecting member at a plurality of positions on one edge and suspended by the projecting member, and a light guide plate that is disposed to face the reflective sheet, and the light source device.
- the present invention relates to a display device provided.
- Such a display device includes a light guide plate and a reflection sheet disposed to face the light guide plate.
- a diffusion sheet, a lens sheet, and a diffusion sheet disposed opposite to the light guide plate are disposed on the side opposite to the light exit surface of the light guide plate, and projecting pieces are provided on the edges thereof.
- a reflection sheet is disposed on a side surface of the light guide plate so as to protrude from the side surface, an opening is provided in a protruding portion of the reflection sheet, and the diffusion sheet, lens sheet, and A liquid crystal display device that locks the protruding piece of the diffusion sheet is disclosed.
- a display device having a structure in which a light guide plate or a reflection sheet is suspended requires a suspension mechanism (for example, a pin member) for the suspension. Therefore, in the display device having such a structure, such a suspension mechanism becomes an obstacle, and it is difficult to extend the light guide plate to the position of the suspension mechanism.
- a suspension mechanism for example, a pin member
- the image display area is expanded so that the position of the suspension mechanism is included in the image display area of the image display screen without extending the light guide plate to the position of the suspension mechanism, the image In the display area corresponding to the suspension mechanism, a malfunction (luminance unevenness) due to the presence of the suspension mechanism or the like occurs, giving the user a sense of discomfort.
- the liquid crystal display device of Patent Document 1 does not have a structure for suspending a light guide plate or a reflection sheet, and is not devised for such a problem.
- the present invention has been made in view of such circumstances, and the object of the present invention is a reflective sheet in which a plurality of locations on one edge are penetrated by a pin-like member and suspended by the pin-like member,
- the light guide plate In the light source device including the light guide plate disposed opposite to the reflection sheet, the light guide plate has a notch at a position where the light guide plate is aligned with the pin-like member at an edge corresponding to one edge of the reflection sheet.
- a light source device includes: a light source device including a reflection sheet penetrating at a plurality of locations on an outer peripheral edge portion and suspended by the protrusion; and a light guide plate disposed to face the reflection sheet.
- the optical plate is an edge corresponding to the outer peripheral edge of the reflection sheet, and has a notch at a position corresponding to the protrusion.
- the light guide plate can be extended by using the notch of the light guide plate to widen the image display area. Further, the reflection sheet near the notch of the light guide plate reflects light irregularly reflected in the vicinity of the side surface of the light guide plate related to the notch to the exit surface side of the light guide plate, thereby suppressing the occurrence of uneven brightness.
- the outer peripheral edge portion of the reflective sheet has irregularities, the protrusion penetrates the convex portion of the outer peripheral edge portion, and the concave portion of the outer peripheral edge portion includes the A spacer is provided to maintain a constant distance between the light guide plate and the reflection sheet.
- the luminance is increased by reflection of the convex portion, and in the surplus portion where the light guide plate exists, the concave portion from which the reflective sheet is removed is provided to lower the luminance. , Prevent unevenness. Further, the spacer can prevent the reflective sheet from coming into contact or pressure contact with the light guide plate, and does not hinder expansion and contraction of the reflective sheet.
- the light source device is a light source device including a reflective sheet having irregularities at a plurality of locations on an outer peripheral edge portion, and a light guide plate disposed opposite to the reflective sheet, wherein the light guide plate is an outer peripheral edge of the reflective sheet It is an edge part corresponding to a part, Comprising: It has a notch in the position corresponding to the said convex part, It is characterized by the above-mentioned.
- the light guide plate can be extended by using the notch of the light guide plate to widen the image display area. Further, the reflection sheet near the notch of the light guide plate reflects light irregularly reflected in the vicinity of the side surface of the light guide plate related to the notch to the exit surface side of the light guide plate, thereby suppressing the occurrence of uneven brightness.
- the light source device is characterized in that a spacer for keeping a constant distance between the light guide plate and the reflection sheet is provided in the concave portion of the outer peripheral edge.
- the luminance is increased by reflection of the convex portion, and in the surplus portion where the light guide plate exists, the concave portion from which the reflective sheet is removed is provided to lower the luminance. , Prevent unevenness. Further, the spacer can prevent the reflective sheet from coming into contact or pressure contact with the light guide plate, and does not hinder expansion and contraction of the reflective sheet.
- the light source device is characterized in that, in the facing direction of the light guide plate and the reflection sheet, a region related to the notch of the light guide plate is configured to be within the convex portion.
- a region related to the notch of the light guide plate is accommodated in the convex portion, and light irregularly reflected near the side surface of the light guide plate related to the notch is guided by the convex portion of the reflective sheet. Reflected on the light exit surface side of the optical plate.
- the light source device is configured such that the distance between the convex portions and the spacers in the parallel direction of the convex portions of the outer peripheral edge portion increases as the distance from the end portion of the reflective sheet increases in the parallel direction. It is characterized by that.
- the interval between the spacers and the convex portions on both sides in the parallel direction is configured to increase in the parallel direction from the center of the reflective sheet to the end of the reflective sheet.
- the light source device is characterized in that the spacer is in pressure contact with an edge of the light guide plate, and the light guide plate is slidable.
- the spacer holds the light guide plate in pressure contact with the edge of the light guide plate.
- the spacer is made of a material having a low coefficient of friction and can slide the light guide plate. Hold on.
- the light source device according to the present invention is characterized in that the spacer has elasticity.
- the spacer since the spacer has elasticity, the light guide plate is held in pressure contact with the edge of the light guide plate.
- the light source device is characterized in that the contact surface of the spacer with the light guide plate is uneven.
- the contact surface uneven by making the contact surface uneven, the contact area (friction) between the spacer and the light guide plate is reduced, and the light guide plate can be freely expanded and contracted.
- the light source device is characterized in that the spacer is in line contact or point contact with the light guide plate.
- the spacer when the spacer comes into contact with the light guide plate, it is configured to be in line contact or point contact. As a result, the contact area between the spacer and the light guide plate is reduced, so that the light guide plate can slide in the extending direction when the light guide plate is thermally expanded or contracted.
- the light source device is characterized in that the contact surface of the spacer with the light guide plate is a white color.
- the contact surface where the spacer comes into contact with the light guide plate is coated with, for example, white, so that the reflectance at the contact surface is increased, and the light near the notch of the light guide plate is increased. Relieve unevenness.
- the light source device is characterized in that the contact surface of the spacer with the light guide plate is a resin.
- the portion related to the contact surface where the spacer contacts the light guide plate is made of resin, so that the light guide plate can slide in the extending direction when the light guide plate is thermally expanded or contracted. It becomes easy to take structure.
- the light source device is characterized in that the contact surface of the spacer with the light guide plate is a metal or a metal compound.
- the portion related to the contact surface where the spacer comes into contact with the light guide plate is made of a metal or a metal compound and has a metallic luster, thereby increasing the reflectance at the contact surface, and the light guide plate.
- the light portion unevenness in the vicinity of the notch is reduced, and the strength for holding the light guide plate is given.
- the light source device includes a light source that emits light to be incident on the light guide plate, and the concave portion is provided at an edge away from the light source.
- the concave portion is provided at the other long side edge. Provided.
- a display device is provided on one surface side of the light source device according to any one of the above-described invention and the light guide plate, and displays an image using light incident through the light guide plate. And a display panel for displaying.
- the display panel displays a predetermined image using light emitted from one surface of the light guide plate of the light source device and incident on the display panel.
- the present invention it is possible to widen the image display area by solving the problem that the light guide plate cannot be extended by a hindering mechanism, and the reflection sheet near the notch of the light guide plate Light that is diffusely reflected in the vicinity of the side surface of the light guide plate related to the cutout is reflected to the exit surface side of the light guide plate, and it is possible to suppress the occurrence of luminance unevenness in the portion corresponding to the suspension mechanism in the image display region.
- FIG. 1 is a front view showing an appearance of a liquid crystal television according to Embodiment 1 of the present invention
- FIG. 2 is an exploded perspective view showing a main part configuration of the liquid crystal television according to the embodiment of the present invention.
- FIG. 3 is a longitudinal sectional view taken along line AB of FIG.
- Reference numeral 100 in the figure denotes a liquid crystal television according to an embodiment of the present invention.
- the horizontal direction of the liquid crystal television in the drawings is referred to as a horizontal direction
- the vertical direction is referred to as a vertical direction.
- the liquid crystal television 100 includes a light source device 1, a liquid crystal display panel 2, an optical sheet 3, a front chassis 4 that accommodates the liquid crystal display panel 2 and the optical sheet 3, and the like.
- the light source device 1 includes the light source unit 14, the light guide plate 11 that guides light incident from the light source unit 14 to one surface on the liquid crystal display panel 2 side, and the one surface of the light guide plate 11 that transmits light incident from the light source unit 14. And a backlight chassis 13 that houses the light source unit 14, the light guide plate 11, and the reflection sheet 12.
- the front chassis 4 is arranged on the front side of the liquid crystal display panel 2 on which images are displayed.
- the front chassis 4 has a cylindrical shape having a rectangular bottom that follows the shape of the one surface 21 of the liquid crystal display panel 2 visually recognized by the user, and a rectangular display window 41 is opened at the bottom. The user can visually recognize an image displayed on the one surface 21 of the liquid crystal display panel 2 through the display window 41.
- the edge from the bottom edge of the front chassis 4 to the edge of the display window 41 has a predetermined width W.
- the bottom portion of the front chassis 4 except the display window 41 is hollow.
- a rectangular frame portion 42 is formed.
- the periphery of one surface 21 is covered with a frame portion 42, the optical sheet 3 is provided on the other surface side of the liquid crystal display panel 2, and one surface of the optical sheet 3 is the other surface of the liquid crystal display panel 2.
- the optical sheet 3 is the other surface of the liquid crystal display panel 2.
- the liquid crystal display panel 2 is, for example, an active matrix system, and includes a transparent substrate on the one surface 21 side and a transparent substrate on the other surface, which are arranged to face each other with a predetermined gap therebetween. Liquid crystal is enclosed. A polarizing plate (not shown) is provided between the transparent substrate on the other surface side and the optical sheet 3.
- the light guide plate 11 of the light source device 1 is provided on the other surface side of the optical sheet 3, and the one surface of the light guide plate 11 is disposed so as to face the other surface of the optical sheet 3.
- the optical sheet 3 which is emitted from the light source unit 14, diffuses and collects light incident on the light guide plate 11 and emits more uniform light toward the liquid crystal display panel 2.
- the optical sheet 3 includes two diffusion sheets and one prism sheet, and the prism sheet is interposed between the two diffusion sheets.
- One diffusion sheet disposed on the light guide plate 11 side of the two diffusion sheets is an optical sheet that diffuses light incident from the light source unit 14 through the light guide plate 11 and enters the prism sheet.
- the prism sheet is an optical sheet that collects light incident through the one diffusion sheet and emits the light toward another diffusion sheet. The light that has passed through the prism sheet is incident on the other diffusion sheet perpendicular to the prism sheet.
- the other diffusion sheet disposed on the liquid crystal display panel 2 side is an optical sheet that further diffuses the light incident through the prism sheet and emits the light toward the liquid crystal display panel 2 with a more uniform luminance distribution. is there.
- the light source device 1 is a so-called edge light system, and includes a light source unit 14, a light guide plate 11 disposed on the other surface side of the optical sheet 3, and a reflection sheet 12 provided on the other surface side of the light guide plate 11. is doing.
- the reflection sheet 12 is disposed so that one surface thereof faces the other surface of the light guide plate 11, and the light guide plate 11 and the reflection sheet 12 are accommodated in the backlight chassis 13 in a stacked state.
- the light guide plate 11 is made of, for example, a highly transparent rectangular acrylic resin, has a predetermined thickness, and guides the light emitted from the light source unit 14 near one side thereof to the optical sheet 3 (liquid crystal panel 2).
- the light guide plate 11 is configured to have an output surface on which a pattern is formed so that light incident from the light source unit 14 travels in the direction of the liquid crystal panel 2 on one surface facing the other surface of the optical sheet 3. May be. Accordingly, the light guide plate 11 can uniformly transmit the light incident from the light source unit 14 to the optical sheet 3 through the emission surface by changing the light to the planar light.
- a reflective sheet 12 is provided on the other surface side of the light guide plate 11.
- the light guide plate 11 has notches 111, 111, 111 formed at three places on one edge of the long side.
- the notches 111, 111, 111 are provided at positions aligned with suspension pin members 132, 132, 132 provided at three locations of the backlight chassis 13 described later.
- the notches 111, 111, 111 are formed at equal intervals at the edge of the other side facing the one side of the light guide plate 11.
- the one side is referred to as a near-light side 112
- the other side is referred to as a far-light side 113.
- the notches 111, 111, 111 are U-shaped in the thickness direction of the light guide plate 11.
- Each side surface of the four sides of the light guide plate 11 is subjected to mirror processing except for the side surface related to the notch 111, and a part of the light incident from the light source unit 14 passes freely from the side surface to the outside.
- the mirror surface processing is not performed on the side surface related to the notch 111, and part of the light incident from the light source unit 14 causes irregular reflection on the side surface related to the notch 111.
- a light guide plate holding frame 8 that presses and holds the light guide plate 11 is provided on the other surface side of the liquid crystal display panel 2.
- the light guide plate holding frame 8 has a cylindrical shape having a rectangular bottom that follows the shape of the bottom of the front cover 4 and has an L shape in cross section. Further, a rectangular opening 81 that follows the display window 41 is formed at the bottom of the light guide plate holding frame 8.
- the light guide plate holding frame 8 presses the peripheral portion of the light guide plate 11 against the reflection sheet 12 via a spacer frame 9 made of an elastic member that prevents damage to the light guide plate 11. That is, the spacer frame 9 has a hollow rectangular shape and is in contact with the peripheral portion of the one surface of the light guide plate 11. That is, at the bottom of the light guide plate holding frame 8, the surplus portion 82 except for the opening 81 has a hollow rectangle, and the inner edge of the surplus portion 82 is in contact with the spacer frame 9 to hold the light guide plate.
- the frame 8 applies a pressing force to the spacer frame 9 toward the light guide plate 11 side. Thereby, the light guide plate 11 is sandwiched between the spacer 7 and the light guide plate holding frame 8 described later.
- the spacer frame 9 is made of, for example, high-density microcell urethane foam, rubber, or elastomer.
- the reflection sheet 12 is a rectangle having a size substantially equal to or slightly larger than that of the light guide plate 11.
- the light incident on the light guide plate 11 from the light source unit 14 is diffusely reflected from the other surface side of the light guide plate 11. The light is emitted through the emission surface.
- the reflection sheet 12 is formed in the vicinity of the far-light side surface 113 of the light guide plate 11 so that the edge on one long side has irregularities. Specifically, it is formed of three convex portions 121, 121, 121 and four concave portions 122, 122, 122, 122, and the three convex portions 121, 121, 121 are equally spaced at the edge. Is formed.
- the concave portion 122 has, for example, a U shape in the thickness direction of the reflective sheet 12, and the convex portion 121 has a rectangular shape.
- a through hole 123 that penetrates the reflection sheet 12 in the thickness direction is formed at the center of each convex portion 121.
- the through hole 123 has a circular shape having a diameter substantially the same as the outer diameter of the suspension pin member 132, and the suspension pin member 132 is inserted into the through hole 123, whereby the reflection sheet 12 is suspended.
- FIG. 4 is an explanatory view schematically showing a case where the light guide plate 11 and the reflection sheet 12 are accommodated in the backlight chassis 13 of the liquid crystal television 100 according to Embodiment 1 of the present invention.
- the positions of the through holes 123, 123, 123 and the notches 111, 111, 111 are aligned in the stacking direction.
- the reflection sheet 12 is slightly larger than the light guide plate 11.
- a spacer for maintaining a constant distance between the light guide plate 11 and the reflection sheet 12 or the bottom 131 of the backlight chassis 13 on each recess 122 of the reflection sheet 12 above the bottom 131 of the backlight chassis 13. 7 is provided.
- the spacers 7 are arranged at the same interval as the convex portions 121 on both sides in the direction in which the concave portions 122, 122, 122, 122 are arranged side by side.
- the spacer 7 has a rectangular parallelepiped shape, for example, and the dimension in the stacking direction greatly exceeds the thickness of the reflection sheet 12.
- the spacer 7 is made of foamed PET, rubber or the like and has a predetermined elasticity.
- the spacer 7 is configured to contact the edge of the light guide plate 11 on the side of the far light side 113 (see FIG. 3). That is, the spacer 7 is interposed between the edge of the light guide plate 11 on the side of the far light side 113 and the bottom 131 of the backlight chassis 13. Therefore, as described above, when the light guide plate holding frame 8 applies a pressing force to the spacer frame 9 toward the light guide plate 11, the light guide plate 11 is sandwiched between the spacer 7 and the light guide plate holding frame 8. Since the spacer 7 has predetermined elasticity as described above, the light guide plate 11 can be sandwiched by pressure bonding.
- the spacer 7 has a low friction coefficient.
- the spacer 7 has a friction coefficient equal to or lower than that of PET, and preferably has a friction coefficient lower than that of the material of the light guide plate 11.
- the spacer 7 has a low coefficient of friction, the light guide plate 11 can slide even when it is sandwiched between the spacer 7 and the light guide plate holding frame 8.
- a light source unit 14 is provided on the lower side surface, that is, near the near-light side surface 112.
- the light source unit 14 is mounted on the substrate 141 facing the near light side surface 112 of the light guide plate 11, and the light source 142 mounted in parallel along the near light side surface 112 of the light guide plate 11. 142,... 142.
- the light sources 142, 142,... 142 are, for example, light emitting diodes (LEDs: LightLiEmitting Diode), cold cathode fluorescent lamps (CCFL: Cold Cathode Fluorescence Lamp), hot cathode tubes (HCFL: Hot Cathode Fluorescent Lamp), external electrodes.
- a fluorescent lamp (EEFL: ExternalFLElectrode Fluorescent Lamp) or the like may be used.
- the light source unit 14 is not limited to the above configuration.
- the light source portion 14 may be provided on both side surfaces of either of the short sides of the light guide plate 11, or on both side surfaces and the near-light side surface 112 of both short sides of the light guide plate 11. The structure provided may be sufficient.
- the backlight chassis 13 has a cylindrical shape having a rectangular bottom 131 that follows the shape of the reflection sheet 12, and the bottom 131 is a column-like suspension that holds the reflection sheet 12 on the upper long side in the vertical direction.
- the pin members 132, 132, 132 are provided so as to be aligned with the positions of the respective through holes 123 of the reflection sheet 12.
- the position of the light guide plate 11 in the backlight chassis 13 is determined by the suspension pin member 132. That is, the suspension pin member 132 also serves as a so-called positioning portion.
- the notches 111, 111, 111 of the light guide plate 11 are the suspension pin members 132, 132 and 132 may be engaged.
- the position of the reflection sheet 12 in the backlight chassis 13 is determined by fitting the through holes 123 of the convex portions 121 to the suspension pin members 132. As described above, in the present invention, misalignment of the light guide plate 11 and the reflection sheet 12 can be prevented.
- the display window 41 can be widened and the width W of the frame portion 42 can be narrowed.
- the area of the image display area in 21) can be expanded.
- the suspension mechanism for the suspension, the projection 121 and the suspension pin in the present invention is required.
- the light guide plate 11 is provided with the notches 111, 111, 111, and the suspension pin members 132, 132, 132 are engaged with the notches 111, 111, 111.
- the light guide plate 11 is provided in an expanded manner.
- each notch 111 of the light guide plate 11 is aligned with the convex portion 121 of the reflection sheet 12 in the stacking direction.
- the region defined by the notch 111 is configured to be within the convex portion 121 of the reflection sheet 12 in the stacking direction.
- the convex portion 121 of the reflection sheet 12 can reflect the light irregularly reflected at the portion along the side surface of the notch 111 and the light reflected by the suspension pin member 132 to the liquid crystal display panel 2 side. Further, most of the surplus portions except for the notches 111, 111, 111 at the end on the far light side surface 113 side of the light guide plate 11 are disposed so as to face the concave portion 122 of the reflection sheet 12, and the liquid crystal display is provided in the surplus portions. Reflection of light to the panel 2 is suppressed.
- the brightness is increased in the notch 111 where the light guide plate 11 is not present, and the reflection sheet 12 is removed to lower the brightness in the surplus portion where the light guide plate 11 is present. Generation of unevenness at the side end can be prevented.
- the width W of the frame portion 42 can be reduced, and a wider image display area can be provided to the user.
- the spacer 7 has a low coefficient of friction
- the light guide plate 11 is sandwiched between the spacer 7 and the light guide plate holding frame 8. It is configured to be slidable. Therefore, the light guide plate 11 can be expanded and contracted as the temperature rises and falls during use of the liquid crystal television 100.
- the spacer 7 is interposed between the edge on the far light side 113 side of the light guide plate 11 and the bottom 131 of the backlight chassis 13. Therefore, the reflection sheet 12 is not in contact with or pressed against the light guide plate 11 at the edge near the far-light side surface 113 of the light guide plate 11, and reflects according to the temperature rise or fall during use of the liquid crystal television 100.
- the sheet 12 can be expanded and contracted, and the reflective sheet 12 can be prevented from being wrinkled.
- the liquid crystal television 100 of the present invention has a structure in which the light guide plate 11 or the reflection sheet 12 is suspended, and the suspension mechanism of the convex portion 121 and the suspension pin member 132 is used for the suspension.
- the case where is necessary is described as an example.
- the present invention is not limited to this, and may be a case where such a suspension mechanism is not provided.
- the edges on both short sides corresponding to both side surfaces adjacent to the far-light side surface 113 of the light guide plate 11 have irregularities, and are positioned on the edge of the reflection sheet 12.
- the configuration may be such that the parts are arranged.
- the light guide plate 11 has a notch 111 at a position corresponding to the convex portion of the edge portion of the reflective sheet 12, and the spacer 7 is located in the concave portion of the edge portion of the reflective sheet 12. What is necessary is just to comprise.
- the convex portions 121, 121, 121 and the concave portions 122, 122, 122, 122 are formed at equal intervals, and in the juxtaposed direction of the concave portions 122, 122, 122, 122, 122, 122, 122, The case where the spacers 7 are arranged so as to have the same interval between the convex portions 121 on both sides (hereinafter simply referred to as the interval between the convex portion 121 and the spacer 7) has been described as an example. It is not limited to.
- FIG. 5 is an explanatory view schematically showing a case where the light guide plate 11 and the reflection sheet 12 are accommodated in the backlight chassis 13 of the liquid crystal television 100 according to Embodiment 2 of the present invention.
- the intervals between the convex portions 121 and the spacers 7 are different in the direction in which the concave portions 122, 122, 122, 122 are arranged.
- the distance between the convex portion 121 and the spacer 7 increases as the distance from the concave portion 122, 122, 122, 122 is closer to the end of the reflective sheet 12. It is comprised so that it may become.
- the central convex portion 121 (hereinafter referred to as the central convex portion 121) and the central convex portion 121 are illustrated.
- a spacer 71 and a spacer 72 are respectively disposed between the left and right convex portions 121 (hereinafter referred to as the left convex portion 121 and the right convex portion 121), respectively.
- a spacer 73 and a spacer 74 are also arranged on the right side of 121.
- the interval A between the central convex portion 121 and the spacer 72, the interval B between the spacer 72 and the right convex portion 121, and the interval C between the right convex portion 121 and the spacer 74 are different, and the interval A ⁇ interval B ⁇ There is a relationship of the interval C.
- the reflection sheet 12 expands and contracts due to thermal expansion, if the central portion in the expansion / contraction direction is held, the amount of expansion / contraction increases toward the end of the reflection sheet 12.
- the relationship of the distance A ⁇ the distance B ⁇ the distance C is established, and the end in the expansion / contraction direction is configured.
- FIG. 6 is a schematic longitudinal sectional view schematically showing the shape of the spacer 7 in the liquid crystal television 100 according to Embodiment 3 of the present invention.
- the spacer 7 is configured to come into contact with the edge of the light guide plate 11 on the side of the far light side 113 (see FIG. 3). Further, the spacer 7 is configured such that the contact surface with the light guide plate 11 is uneven.
- the liquid crystal television 100 according to Embodiment 3 of the present invention has such a configuration, the contact area (friction) between the spacer 7 and the light guide plate 11 can be reduced, and the use of the liquid crystal television 100 can be reduced.
- the light guide plate 11 can be further expanded and contracted in response to the temperature rise and fall inside.
- the spacer 7 has the same configuration as the spacer 7 according to the first embodiment, and is further in line contact or point contact with the light guide plate 11. It is configured.
- the spacer 7 and the light guide plate 11 are slidable in the expansion / contraction direction when the light guide plate 11 is thermally expanded / contracted, that is, the light guide plate 11 is not restricted from expansion / contraction.
- the light guide plate 11 is thermally expanded and contracted without being hindered, and the warpage of the light guide plate 11 can be suppressed and good display quality can be maintained.
- the spacer 7 has the same configuration as the spacer 7 according to the first embodiment, and the contact surface with the light guide plate 11 has a white color. It is a painted configuration.
- the spacer 7 has the same configuration as that of the spacer 7 according to the first embodiment, and the portion related to the contact surface with the light guide plate 11 is made of resin. It is comprised so that it may become.
- the elasticity of the resin itself can be changed, and it becomes easy to perform unevenness processing, low friction coefficient processing, and the like on the contact surface of the spacer 7. Therefore, the thermal expansion / contraction of the light guide plate 11 is performed without being hindered, the warpage of the light guide plate 11 can be suppressed, and good display quality can be maintained.
- the spacer 7 has the same configuration as the spacer 7 according to the first embodiment, and the portion related to the contact surface with the light guide plate 11 is made of metal or It is comprised from a metal compound.
- At least the surface of the spacer 7, or at least the contact surface with the light guide plate 11, is made of metal or a metal compound so as to have a metallic luster, thereby increasing the reflectance at the spacer 7, thereby increasing the reflectance around the notches 111, 111, 111. And the uneven brightness of the notches 111, 111, 111 is alleviated.
- the spacer 7 can have a strength for holding the light guide plate 11.
- Light source device Liquid crystal display panel (display panel) 7 Spacer 11 Light guide plate 12 Reflective sheet 13 Backlight chassis 100 Liquid crystal television (display device) 111 Notch 121 Convex part 122 Concave part 132 Suspension pin member (protrusion) A, B, C interval
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Abstract
Description
図1は本発明の実施の形態1に係る液晶テレビジョンの外観を示す正面図であり、図2は本発明の実施の形態に係る液晶テレビジョンの要部構成を示す分解斜視図であり、図3は図1のA―B線による縦断面図である。図中符号100は、本発明の実施の形態に係る液晶テレビジョンを示す。以下、説明の便宜上、図面における液晶テレビジョンの左右方向を横方向、上下方向を縦方向という。
実施の形態1においては、凸部121,121,121、及び、凹部122,122,122,122が等間隔に形成されており、かつ、凹部122,122,122,122の並設方向において、スペーサ7が両側の夫々の凸部121となす間隔(以下、単に、凸部121及びスペーサ7の間隔という)が同一であるように配置されている場合を例に説明したが、本発明はこれに限るものでない。
実施の形態1では、スペーサ7が低い摩擦係数を有し、かつ、所定の弾性を有している場合を例に説明したが、本発明はこれに限るものでない。
実施の形態1では、スペーサ7が低い摩擦係数を有し、かつ、所定の弾性を有している場合を例に説明したが、本発明はこれに限るものでない。
実施の形態1では、スペーサ7が低い摩擦係数を有し、かつ、所定の弾性を有している場合を例に説明したが、本発明はこれに限るものでない。
実施の形態1では、スペーサ7が低い摩擦係数を有し、かつ、所定の弾性を有している場合を例に説明したが、本発明はこれに限るものでない。
実施の形態1では、スペーサ7が低い摩擦係数を有し、かつ、所定の弾性を有している場合を例に説明したが、本発明はこれに限るものでない。
2 液晶表示パネル(表示パネル)
7 スペーサ
11 導光板
12 反射シート
13 バックライトシャーシ
100 液晶テレビジョン(表示装置)
111 切り欠き
121 凸部
122 凹部
132 吊りピン部材(突起)
A,B,C 間隔
Claims (15)
- 外周縁部の複数箇所が突起によって貫通され、該突起によって吊持された反射シートと、該反射シートと対向配置された導光板とを備える光源装置において、
前記導光板は、
前記反射シートの前記外周縁部に対応する縁部であって、前記突起に対応する位置に切り欠きを有することを特徴とする光源装置。 - 前記反射シートの前記外周縁部は凹凸を有しており、該外周縁部の凸部を前記突起が貫通しており、
前記外周縁部の凹部には、前記導光板及び反射シートの間隔を一定に保持するスペーサが設けられていることを特徴とする請求項1に記載の光源装置。 - 外周縁部の複数箇所に凹凸を有する反射シートと、該反射シートに対向配置された導光板とを備える光源装置において、
前記導光板は、
前記反射シートの外周縁部に対応する縁部であって、前記凸部に対応する位置に切り欠きを有することを特徴とする光源装置。 - 前記外周縁部の凹部には、前記導光板及び反射シートの間隔を一定に保持するスペーサが設けられていることを特徴とする請求項3に記載の光源装置。
- 前記導光板及び反射シートの対向方向にて、前記導光板の切り欠きに係る領域は、前記凸部内に収まるように構成されていることを特徴とする請求項2から4の何れかに記載の光源装置。
- 前記外周縁部の凸部の並列方向における、各凸部及びスペーサの間隔は、該並列方向において前記反射シートの端部に近いほど大きくなるように構成されていることを特徴とする請求項2から5に記載の光源装置。
- 前記スペーサは前記導光板の縁部と圧接しており、
前記導光板は摺動可能であることを特徴とする請求項2、4から6の何れかに記載の光源装置。 - 前記スペーサは弾性を有することを特徴とする請求項2、4から7の何れかに記載の光源装置。
- 前記スペーサは、前記導光板との接触面が凹凸していることを特徴とする請求項2、4から8の何れかに記載の光源装置。
- 前記スペーサは、前記導光板に対して線接触又は点接触してあることを特徴とする請求項2、4から7の何れかに記載の光源装置。
- 前記スペーサは、前記導光板との接触面が白色系の色であることを特徴とする請求項2、4から10の何れかに記載の光源装置。
- 前記スペーサは、前記導光板との接触面が樹脂であることを特徴とする請求項2、4から11の何れかに記載の光源装置。
- 前記スペーサは、前記導光板との接触面が金属又は金属化合物であることを特徴とする請求項2、4から11の何れかに記載の光源装置。
- 前記導光板に入光すべき光を発する光源を備え、
前記凹部が、前記光源から離れた縁部に設けられていることを特徴とする請求項2又は4に記載の光源装置。 - 請求項1から14の何れかに記載の光源装置と、
前記導光板の一面側に設けられており、該導光板を介して入射される光を用いて画像を表示する表示パネルと
を備えることを特徴とする表示装置。
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PCT/JP2013/069514 WO2015008362A1 (ja) | 2013-07-18 | 2013-07-18 | 光源装置及び表示装置 |
US14/905,214 US10191208B2 (en) | 2013-07-18 | 2013-07-18 | Light source device and display apparatus |
JP2015527111A JP6199971B2 (ja) | 2013-07-18 | 2013-07-18 | 光源装置及び表示装置 |
CN201380078291.XA CN105378523B (zh) | 2013-07-18 | 2013-07-18 | 光源装置和显示装置 |
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US20160195672A1 (en) | 2016-07-07 |
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JP6199971B2 (ja) | 2017-09-20 |
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