WO2012023484A1 - Appareil d'éclairage et appareil d'affichage - Google Patents

Appareil d'éclairage et appareil d'affichage Download PDF

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Publication number
WO2012023484A1
WO2012023484A1 PCT/JP2011/068353 JP2011068353W WO2012023484A1 WO 2012023484 A1 WO2012023484 A1 WO 2012023484A1 JP 2011068353 W JP2011068353 W JP 2011068353W WO 2012023484 A1 WO2012023484 A1 WO 2012023484A1
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WO
WIPO (PCT)
Prior art keywords
guide plate
light guide
positioning
cushion member
light
Prior art date
Application number
PCT/JP2011/068353
Other languages
English (en)
Japanese (ja)
Inventor
良武 石元
Original Assignee
シャープ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2012023484A1 publication Critical patent/WO2012023484A1/fr

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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

Definitions

  • the present invention relates to a lighting device and a display device.
  • the liquid crystal display panel that displays images does not emit light, so an illumination device is installed on the back side of the liquid crystal display panel (the side opposite to the display surface side of the liquid crystal display panel)
  • the liquid crystal display panel is illuminated with light from the illumination device.
  • the illuminating device installed in the back surface side of a liquid crystal display panel is called the backlight unit etc., for example.
  • the backlight unit installed in the liquid crystal display device is roughly classified into two types, a direct type and an edge light type.
  • each of the direct type backlight unit and the edge light type backlight unit will be briefly described.
  • a light source is provided directly below the liquid crystal display panel (an area facing the back surface of the liquid crystal display panel). Is arranged. The light emitted from the light source illuminates the liquid crystal display panel via an optical sheet (such as a diffusion sheet, a lens sheet, and a polarizing sheet).
  • an optical sheet such as a diffusion sheet, a lens sheet, and a polarizing sheet.
  • a light guide plate is disposed immediately below the liquid crystal display panel, and a light source is disposed to face a predetermined side end surface of the light guide plate.
  • a light source is disposed to face a predetermined side end surface of the light guide plate.
  • an edge light type backlight unit components such as a light guide plate and a light source are usually accommodated in an accommodation area of a casing (accommodating container).
  • the light guide plate is held and positioned in the housing region of the housing.
  • a convex portion for positioning is formed on the housing, and a concave portion for positioning into which the convex portion of the housing is fitted is formed on the light guide plate.
  • Patent Document 1 Japanese Patent Document 1
  • the light guide plate When positioning the light guide plate using the conventional method described above, in order to ensure the positioning of the light guide plate, there is no gap between the positioning convex portion of the housing and the positioning concave portion of the light guide plate. Must be mated. However, if the convex portion of the housing and the concave portion of the light guide plate are fitted without a gap, the light guide plate is damaged (for example, the light guide plate is broken) when the light guide plate is expanded and deformed due to heat. appear.
  • the present invention has been made in order to solve the above-described problems, and an object thereof is to provide an illumination device and a display device capable of reliably positioning the light guide plate while suppressing damage to the light guide plate. To do.
  • a lighting device includes a housing, a front surface housed in the housing and facing the illuminated body, a rear surface opposite to the front surface, and a front surface. And a light guide plate having a plurality of side end surfaces connected to the rear surface, and a positioning concave portion formed on a predetermined side end surface of the plurality of side end surfaces, and a fitting portion fitted into the positioning concave portion of the light guide plate A positioning member.
  • a surface of the fitting portion of the positioning member that faces the concave surface of the positioning concave portion of the light guide plate is covered with an elastically deformable cushion member.
  • the concave surface of the positioning concave portion of the light guide plate in the surface of the fitting portion of the positioning member is opposed.
  • the cushion member is prevented from generating a gap between the positioning concave portion of the light guide plate and the cushion member. Restore and transform. From these things, rattling of the light guide plate is suppressed and the light guide plate can be positioned reliably.
  • the positioning of the light guide plate is achieved by the function of the cushion member.
  • the stress generated between the concave portion for use and the fitting portion of the positioning member is relieved. For this reason, inconveniences such as damage to the light guide plate (for example, breakage of the light guide plate) can be avoided.
  • the cushion member is fixed to the surface of the fitting portion of the positioning member.
  • the positioning member is made of a pin-like member erected along the thickness direction of the light guide plate. If comprised in this way, the fitting part of a positioning member (pin-shaped member) can be easily engage
  • a pin-shaped member used as a positioning member it is a positioning pin etc., for example.
  • the positioning member is a pin-shaped member
  • the surface of the fitting portion of the positioning member is covered with a cushion member over the entire circumference. If comprised in this way, when assembling a positioning member, it becomes unnecessary to consider the position of the circumferential direction of a positioning member. That is, the assembly work of the positioning member is simplified.
  • the cushion member In the configuration in which the surface of the fitting portion of the positioning member (pin-shaped member) is covered with the cushion member over the entire circumference, the cushion member is processed into a cylindrical shape in advance, and the cushion member processed into the cylindrical shape in advance
  • the fitting portion of the positioning member may be inserted into the hollow portion. If comprised in this way, the surface of the fitting part of a positioning member can be easily covered with a cushion member over a perimeter. Furthermore, since the cushion member is unlikely to come off from the fitting portion of the positioning member, the reliability is improved.
  • the cushion member is a sheet shape, and the sheet-like cushion member is the fitting portion of the positioning member. It may be wound around. If comprised in this way, the thickness of a cushion member can be adjusted by changing the winding number of a cushion member. Further, even if the positioning member has a triangular prism shape or a quadrangular prism shape, it is easy to cover the surface of the fitting portion of the positioning member with the cushion member over the entire circumference.
  • flanges are formed at both ends in the pin axis direction of the fitting portion of the positioning member. Is preferred. With this configuration, even if the cushion member tries to move in the pin axis direction, the movement of the cushion member in the pin axis direction is restricted by the flange portion of the positioning member. For this reason, it can suppress that a cushion member falls out from the fitting part of a positioning member.
  • the pin axis direction is the same direction as the thickness direction of the light guide plate.
  • the display device includes the illumination device according to the first aspect and a display panel illuminated with light from the illumination device.
  • the light guide plate can be reliably positioned while suppressing damage to the light guide plate.
  • an illumination device and a display device capable of reliably positioning the light guide plate while suppressing damage to the light guide plate.
  • This display device is a liquid crystal display device, and as shown in FIG. 1, a liquid crystal display panel 10 for displaying an image, and a backlight unit 20 installed on the back surface side opposite to the display surface side of the liquid crystal display panel 10. And at least.
  • the liquid crystal display panel 10 is an example of the “illuminated body” and the “display panel” in the present invention.
  • the backlight unit 20 is an example of the “lighting device” in the present invention.
  • the liquid crystal display device further includes a bezel BZ as a casing, and the liquid crystal display panel 10 and the backlight unit 20 are covered from the display surface side of the liquid crystal display panel 10 by the bezel BZ.
  • the liquid crystal display panel 10 has a display area where an image is actually displayed and a non-display area which is an outer edge area of the display area. A plurality of pixels arranged in a matrix are formed in the display area of the liquid crystal display panel 10.
  • Each of the plurality of pixels is driven by a switching element, a pixel electrode, a common electrode, and the like. Note that the switching element, the pixel electrode, and the common electrode are not shown in order to make the drawing easy to see, and wirings that are electrically connected to them are not shown.
  • the switching element is made of a TFT (thin film transistor), the gate of the switching element is connected to a gate line (scanning line), and the source of the switching element is connected to a source line (data line).
  • a pixel electrode is connected to the drain of the switching element, a common electrode is disposed so as to face the pixel electrode, and a liquid crystal (not shown) is sandwiched between the pixel electrode and the common electrode.
  • the switching elements are individually provided for each pixel, and the pixel electrodes are also individually provided for each pixel.
  • the common electrode is common to each pixel.
  • the backlight unit 20 is of an edge light type, emits white backlight light in a planar shape, and uniformly illuminates the back surface of the liquid crystal display panel 10 with the backlight light.
  • the optical property (light transmittance) of the liquid crystal is changed for each pixel based on the video signal. Specifically, in each pixel, an electric field is generated between the pixel electrode and the common electrode by supplying predetermined power to the pixel electrode via the switching element. The orientation of the liquid crystal, that is, the transmittance of light transmitted through the liquid crystal is changed by the electric field generated between the pixel electrode and the common electrode.
  • the liquid crystal display panel 10 includes at least two transparent substrates 11 and 12 as shown in FIG.
  • One transparent substrate 11 is referred to as an active matrix substrate, and the other transparent substrate 12 may be referred to as a counter substrate because it is disposed opposite to the transparent substrate 11, or a color substrate.
  • a switching element and a pixel electrode are formed, and a gate line (scanning line) and a source line (data line) electrically connected to them are also formed.
  • a common electrode is formed on a predetermined surface of the other transparent substrate 12.
  • a color filter is further formed on the predetermined surface of the other transparent substrate 12 as necessary.
  • Each predetermined surface of the two transparent electrodes 11 and 12 is covered with an alignment film (not shown) capable of aligning the liquid crystal in a specific direction.
  • the two transparent substrates 11 and 12 are bonded to each other via a seal material (not shown) so that their predetermined surfaces face each other.
  • a liquid crystal is sealed between the two transparent substrates 11 and 12.
  • the liquid crystal is sandwiched between the pixel electrode and the common electrode (between the alignment film covering the predetermined surface of one transparent substrate 11 and the alignment film covering the predetermined surface of the other transparent electrode 12). ing.
  • the outer sizes of the two transparent substrates 11 and 12 are different from each other, and the outer size of the transparent substrate 11 is larger than the outer size of the transparent substrate 12. Accordingly, the two transparent substrates 11 and 12 are bonded to each other, but the predetermined ends of the transparent substrates 11 and 12 do not match each other, and a part of the predetermined surface of the transparent substrate 11 is separated from the transparent substrate 12. Exposed. The exposed portion of the predetermined surface of the transparent substrate 11 is a region of a non-display area, and is used for electrically connecting a driver (not shown) to the transparent substrate 11.
  • a polarizing sheet 13 that transmits only light waves in a specific vibration direction is attached to each of the surfaces of the two transparent substrates 11 and 12 opposite to the predetermined surfaces (surfaces on the liquid crystal side). Yes.
  • the transmission axis directions of the two polarizing sheets 13 are shifted from each other by about 90 °.
  • the backlight unit 20 installed on the back side of the liquid crystal display panel 10 includes a back chassis 21, a reflection sheet 22, a light guide plate 23, an optical sheet 24, and a light source module. 25.
  • the back chassis 21 is an example of the “housing” in the present invention.
  • the back chassis 21 is formed in a substantially box shape with the liquid crystal display panel 10 side opened. That is, the back chassis 21 has a bottom portion and side portions erected on the outer periphery of the bottom portion. An area surrounded by the bottom and sides of the back chassis 21 is an accommodation area, and the reflection sheet 22, the light guide plate 23, the optical sheet 24, and the light source module 25 are accommodated in the accommodation area of the back chassis 21. Is done.
  • the reflection sheet 22 is placed on the inner surface (bottom surface) of the bottom of the back chassis 21. That is, due to the presence of the reflection sheet 22, the inner surface of the bottom portion of the back chassis 21 is a light reflection surface.
  • the light guide plate 23 introduces light from the light source module 25 and emits the light toward the liquid crystal display panel 10 side.
  • the light guide plate 23 is formed on the front surface 23a and the rear surface 23b opposite to the front surface 23a, and on the front surface 23a and the rear surface 23b.
  • the plurality of side end surfaces are connected to each other, and are placed on the inner surface of the bottom portion of the back chassis 21 via the reflection sheet 22.
  • the front surface 23 a of the light guide plate 23 is directed toward the liquid crystal display panel 10, and the rear surface 23 b of the light guide plate 23 is directed toward the bottom side of the back chassis 21.
  • the front surface 23a of the light guide plate 23 becomes a light emitting surface for emitting light introduced into the light guide plate 23 (light from the light source module 25) toward the liquid crystal display panel 10 side.
  • the rear surface 23b of the light guide plate 23 is covered with the reflection sheet 22, it does not become a light emission surface.
  • the outer shape of the light guide plate 23 (planar shape of the front surface 23 a and the rear surface 23 b) is substantially rectangular in a plan view from the side facing the front surface 23 a of the light guide plate 23. . That is, the light guide plate 23 has four side end faces 23c to 23f. Of the four side end surfaces 23c to 23f of the light guide plate 23, the side end surface 23c is a light incident surface on which light from the light source module 25 is incident. For this reason, the light from the light source module 25 is introduced into the light guide plate 23 through the side end surface (light incident surface) 23 c of the light guide plate 23.
  • the side end surfaces 23c and 23d of the light guide plate 23 are surfaces that face in opposite directions and are parallel to the longitudinal direction (X direction) of the light guide plate 23 in plan view. Further, the side end surfaces 23e and 23f of the light guide plate 23 are surfaces facing in opposite directions to each other and parallel to the short direction (Y direction) of the light guide plate 23 in plan view.
  • the optical sheet 24 shown in FIGS. 1 and 2 includes a diffusion sheet, a lens sheet, and the like, and is placed on the front surface (light emitting surface) 23a of the light guide plate 23.
  • the optical sheet 24 diffuses or collects light emitted from the front surface (light emitting surface) 23a of the light guide plate 23.
  • the type and the number of sheets used of the optical sheet 24 are appropriately changed according to the application.
  • the light source module 25 is for generating light (light introduced into the light guide plate 23) as a base of backlight light, and is disposed on the side end surface (light incident surface) 23c side of the light guide plate 23.
  • the number of light source modules 25 used is not particularly limited.
  • the light source module 25 may be further added, and the added light source module 25 may be disposed on the side end face 23 d side of the light guide plate 23.
  • the side end surface 23d of the light guide plate 23 may also function as a light incident surface.
  • the light source module 25 has a structure in which a plurality of LEDs 27 are mounted on a mounting surface 26a of the same printed circuit board 26. Note that the number of LEDs 27 mounted is not particularly limited, and can be changed according to the application.
  • the printed circuit board 26 is made of an FPC (flexible printed wiring board) formed in a strip shape, and the mounting surface 26a is held so as to face the side end surface (light incident surface) 23c of the light guide plate 23. For this reason, the LED 27 mounted on the mounting surface 26 a of the printed circuit board 26 also faces the side end surface (light incident surface) 23 c of the light guide plate 23. Accordingly, when light is emitted from the LED 27, the light enters the side end face (light incident surface) 23 c of the light guide plate 23 and is introduced into the light guide plate 23.
  • FPC flexible printed wiring board
  • the LED 27 is a white LED, for example, a combination of a phosphor that converts blue (blue-violet) LED light into yellow and a blue LED (blue-violet LED). Note that a combination of a phosphor that converts blue (blue-violet) LED light into green and red and a blue LED (blue-violet LED) may be used as LED 27, and three types of blue LED, green LED, and red LED may be used. It is good also as what combined LED of LED27.
  • the light guide plate 23 In order to make the light from the light source module 25 incident on the side end surface (light incident surface) 23c of the light guide plate 23 efficiently, the light guide plate 23 must be accurately positioned in the accommodation region of the back chassis 21. Is required.
  • the two positioning pins 31 are attached to the bottom of the back chassis 21, and the positioning of the light guide plate 23 in the accommodation area of the back chassis 21 is performed with high accuracy using the positioning pins 31.
  • the positioning pin 31 is an example of the “positioning member” and “pin-shaped member” in the present invention.
  • one positioning pin 31 is disposed on each side of the side end faces 23e and 23f of the light guide plate 23 and is directed from the bottom of the back chassis 21 into the accommodation area. It is erected so as to extend along the direction (the thickness direction of the light guide plate 23).
  • the constituent material and shape of the positioning pin 31 are not particularly limited.
  • a metal such as aluminum or stainless steel is used as the constituent material of the positioning pin 31, and the positioning pin 31 has a substantially cylindrical shape. It is said.
  • each of the side end faces 23 e and 23 f of the light guide plate 23 is formed with a positioning recess (notch) 23 g.
  • the side end surfaces 23e and 23f in which the concave portion 23g of the light guide plate 23 is formed are an example of the “predetermined side end surface” in the present invention.
  • the reflective sheet 22 is also formed with a recess 22 a similar to the recess 23 g of the light guide plate 23.
  • the recess 23 g formed on the side end surface 23 e of the light guide plate 23 is U-shaped in one direction in the X direction from the surface of the side end surface 23 e (the direction from the side end surface 23 e to the side end surface 23 f). It consists of a notch cut into a letter shape and is arranged at the center of the side end face 23e in the Y direction.
  • the recess 23g formed on the side end face 23f of the light guide plate 23 is U-shaped in the other direction opposite to one direction in the X direction from the surface of the side end face 23f (the direction from the side end face 23f toward the side end face 23e).
  • the recess 23g of the light guide plate 23 corresponds to a through-hole whose opening shape is a substantially semicircular shape.
  • a predetermined portion of the positioning pin 31 (hereinafter referred to as a fitting portion 31a) is fitted into the recess 23g of the light guide plate 23, thereby restricting movement (positional deviation) of the light guide plate 23 in the X direction and the Y direction.
  • a fitting portion 31a A predetermined portion of the positioning pin 31 (hereinafter referred to as a fitting portion 31a) is fitted into the recess 23g of the light guide plate 23, thereby restricting movement (positional deviation) of the light guide plate 23 in the X direction and the Y direction.
  • the cushion member 32 is sandwiched between the concave portion 23 g of the light guide plate 23 and the fitting portion 31 a of the positioning pin 31.
  • the gap between the concave portion 23 g of the light guide plate 23 and the fitting portion 31 a of the positioning pin 31 is substantially filled with the cushion member 32.
  • the constituent material of this cushion member 32 is not specifically limited, For example, it is a cushion material which can be elastically deformed, such as urethane and sponge.
  • the fitting portion 31a of the positioning pin 31 is not in contact with the concave surface of the concave portion 23g of the light guide plate 23, and the cushion member 32 is always in contact with substantially the entire concave surface of the concave portion 23g of the light guide plate 23. is doing. That is, there is no gap between the concave surface of the concave portion 23 g of the light guide plate 23 and the cushion member 32 in each of the X direction and the Y direction.
  • the cushion member 32 is separated from the concave surface of the concave portion 23 g of the light guide plate 23, but actually, the cushion member 32 contacts the concave surface of the concave portion 23 g of the light guide plate 23. is doing.
  • the cushion member 32 is fixed to the entire surface of the fitting portion 31a of the positioning pin 31 so that the surface of the fitting portion 31a of the positioning pin 31 extends over the entire periphery. It is in a state covered with the cushion member 32 (a state in which the fitting portion 31a of the positioning pin 31 is inserted into the hollow portion 32a of the cylindrical cushion member 32).
  • the cushion member 32 fixed to the surface of the fitting portion 31a of the positioning pin 31 is elastically deformed (compressed) by being sandwiched between the concave portion 23g of the light guide plate 23 and the fitting portion 31a of the positioning pin 31. Has been. Therefore, an urging force that presses the concave surface of the concave portion 23 g of the light guide plate 23 is always generated in the cushion member 32.
  • both ends of the fitting portion 31a of the positioning pin 31 in the pin axial direction (Z direction) are respectively larger than the outer diameter of the fitting portion 31a of the positioning pin 31.
  • a flange portion 31b having a diameter is formed. That is, the fitting portion 31a of the positioning pin 31 is a small diameter portion, and both end portions in the Z direction of the fitting portion 31a of the positioning pin 31 are large diameter portions. Steps are formed at both ends in the Z direction of the joint portion 31a.
  • the cushion member 32 fixed to the surface of the fitting portion 31 a of the positioning pin 31 is restricted by the flange portion 31 b of the positioning pin 31 from moving in the Z direction.
  • the method of fixing the cushion member 32 to the surface of the fitting portion 31a of the positioning pin 31 is not particularly limited.
  • a cushion member 32 that has been processed into a cylindrical shape in advance is prepared, and the cylindrical member
  • the fitting portion 31a of the positioning pin 31 may be inserted into the hollow portion (hole portion having a circular opening) 32a of the cushion member 32.
  • a sheet-like cushion member 32 may be prepared, and the sheet-like cushion member 32 may be wound around the fitting portion 31 a of the positioning pin 31 over the entire circumference. .
  • the elastically deformable cushion member 32 At least the surface of the fitting portion 31a of the positioning pin 31 that faces the concave surface of the concave portion 23g of the light guide plate 23 is covered with the elastically deformable cushion member 32, thereby introducing a guide. Even if the light plate 23 expands and deforms due to the influence of heat, the cushion member 32 can absorb the expansion and deformation of the light guide plate 23. For this reason, it is not necessary to provide a gap between the recess 23g of the light guide plate 23 and the cushion member 32 in advance.
  • the cushion member 32 is always elastically deformed (compressed), so that even if the light guide plate 23 is contracted and deformed, the cushion is formed so that no gap is generated between the recess 23g of the light guide plate 23 and the cushion member 32. The member 32 is restored and deformed. From these things, since the shakiness of the light-guide plate 23 is suppressed, the light-guide plate 23 can be positioned reliably.
  • the light guide plate can be obtained by the function of the cushion member 32.
  • the stress generated between the recess 23g of the 23 and the fitting portion 31a of the positioning pin 31 is relieved. Therefore, inconveniences such as damage to the light guide plate 23 (for example, the light guide plate 23 breaks) can be avoided.
  • the cushion member 32 by attaching the cushion member 32 to the surface of the fitting portion 31a of the positioning pin 31, it is possible to easily guide at least the surface of the fitting portion 31a of the positioning pin 31. It is possible to keep the state where the surface of the optical plate 23 facing the concave surface of the concave portion 23g is covered with the cushion member 32.
  • the positioning pin 31 when the positioning pin 31 is attached to the bottom of the back chassis 21 by covering the surface of the fitting portion 31a of the positioning pin 31 with the cushion member 32 over the entire circumference, There is no need to consider the circumferential position of 31. That is, the attaching operation of the positioning pins 31 to the bottom portion of the back chassis 21 is simplified.
  • the processing time of the light-guide plate 23 is shortened by making the shape of the recessed part 23g formed in the light-guide plate 23 into a U shape as mentioned above, the processing operation of the light-guide plate 23 is carried out. Efficiency can be increased.
  • a cushion member 32 that has been processed into a cylindrical shape is prepared in advance, and the positioning pin 31 is inserted into the hollow portion 32 a of the cylindrical cushion member 32.
  • the method of inserting the fitting part 31a is employed, the surface of the fitting part 31a of the positioning pin 31 can be easily covered with the cushion member 32 over the entire circumference. Furthermore, it becomes difficult for the cushion member 32 to come off from the fitting portion 31a of the positioning pin 31, and the reliability is improved.
  • the sheet-like cushion member 32 is prepared and the method of winding the sheet-like cushion member 32 around the fitting portion 31a of the positioning pin 31 over the entire circumference is adopted, the number of turns of the cushion member 32 is set. By changing, the thickness of the cushion member 32 can be adjusted. Even if the positioning pin 31 has a triangular prism shape or a quadrangular prism shape, it is easy to cover the surface of the fitting portion 31a of the positioning pin 31 with the cushion member 32 over the entire circumference.
  • the surface of the fitting portion 31a of the positioning pin 31 is covered with the cushion member 32 over the entire circumference.
  • the present invention is not limited to this, and as shown in FIG. Of the surface of the fitting portion 31a, only the surface facing the concave surface of the concave portion 23g of the light guide plate 23 may be covered with the cushion member 32, and the other surfaces may not be covered with the cushion member 32.
  • the cushion member 32 is separated from the concave surface of the concave portion 23 g of the light guide plate 23, but actually, the cushion member 32 contacts the concave surface of the concave portion 23 g of the light guide plate 23. is doing.
  • the recesses 23g are formed in the side end surfaces 23e and 23f parallel to each other among the four side end surfaces 23c to 23f of the light guide plate 23.
  • the present invention is not limited to this, and FIG. As shown, a recess 23g may be formed on the side end surface 23e of the light guide plate 23 and a side end surface 23d that forms a right angle with the side end surface 23e.
  • the side end surfaces 23d and 23e of the light guide plate 23 correspond to “predetermined side end surfaces” of the present invention.
  • the recess 23g may be formed on each of the side end faces 23f and 23d of the light guide plate 23 that are perpendicular to each other.
  • the side end surface 23c of the light guide plate 23 functions as a light incident surface, it is preferable not to form the recess 23g on the side end surface 23c of the light guide plate 23.
  • a notch cut into U shape (substantially semicircle shape) from the surface of the side end surface 23e (23f) of the light-guide plate 23 was set as the recessed part 23g, this invention is not limited to this.
  • a notch cut into a square shape from the surface of the side end face 23e (23f) of the light guide plate 23 may be a recess 23g, or the side of the light guide plate 23 as shown in FIG.
  • a notch cut in a triangular shape from the surface of the end face 23e (23f) may be used as the recess 23g.
  • a notch cut into a U shape (substantially semicircular shape) from the surface of the side end face 23e (23f) of the light guide plate 23 is the recess 23g.
  • the light guide plate 23 is positioned using the positioning pins 31 which are members different from the back chassis 21.
  • the present invention is not limited to this, for example, the back chassis 21 is not shown.
  • the light guide plate 23 may be positioned by using a positioning projection formed integrally with the positioning pin 31, that is, the member corresponding to the “positioning member” of the present invention may not be the positioning pin 31.
  • the LED 27 is used as the light source of the backlight unit 20, but the present invention is not limited to this, and a cold cathode tube or the like may be used as the light source of the backlight unit 20.
  • the present invention is not limited to this, and the present invention may be applied to display devices other than the liquid crystal display device.
  • Liquid crystal display panel (display panel) 20
  • Backlight unit (lighting device) 21
  • Back chassis (housing) 23 light guide plate 23a front surface 23b rear surface 23c, 23d, 23e, 23f side end surface 31 positioning pin (positioning member, pin-shaped member) 31a fitting part 31b collar part 32 cushion member 32a hollow part

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

Abstract

L'invention porte sur un appareil d'éclairage dans lequel le positionnement d'une plaque de guidage de lumière peut être exécuté avec fiabilité, tout en évitant que des détériorations à la plaque de guidage de lumière ne se produisent. L'appareil d'éclairage est pourvu : d'une plaque de guidage de lumière (23), qui présente des sections en creux de positionnement (23g) formées sur les faces d'extrémité latérale (23e, 23f) de celle-ci, et de broches de positionnement (31), qui comportent des sections d'enchevêtrement (31a) qui sont destinées à être enchevêtrées dans les sections en creux (23g). Au moins des faces des sections d'enchevêtrement (31a) qui font face aux faces en creux des sections en creux (23g), parmi toutes les faces des sections d'enchevêtrement (31a), sont couvertes par des éléments d'amortissement (32).
PCT/JP2011/068353 2010-08-20 2011-08-11 Appareil d'éclairage et appareil d'affichage WO2012023484A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010-184589 2010-08-20
JP2010184589 2010-08-20

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WO2012023484A1 true WO2012023484A1 (fr) 2012-02-23

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013178334A (ja) * 2012-02-28 2013-09-09 Sharp Corp 表示装置、及びテレビ受信装置
WO2013149407A1 (fr) * 2012-04-05 2013-10-10 深圳市华星光电技术有限公司 Module de rétroéclairage et dispositif d'affichage à cristaux liquides
WO2013166773A1 (fr) * 2012-05-10 2013-11-14 深圳市华星光电技术有限公司 Plaque de guidage de lumière dotée d'une structure fixe pour l'amortissement et la protection, et dispositif d'affichage à cristaux liquides associé
WO2014192660A1 (fr) * 2013-05-28 2014-12-04 堺ディスプレイプロダクト株式会社 Dispositif de source de lumière et dispositif d'affichage
US8958030B2 (en) 2012-05-10 2015-02-17 Shenzhen China Star Optoelectronics Technology Co., Ltd. Backlight unit having buffer structures and liquid crystal display device using the same
WO2015186638A1 (fr) * 2014-06-06 2015-12-10 シャープ株式会社 Dispositif d'affichage et dispositif récepteur de télévision
US20160282548A1 (en) * 2013-12-20 2016-09-29 Shenzhen China Star Optoelectronics Technology Co., Ltd. Light guide plate, method for manufacturing same and backlight module
WO2017195466A1 (fr) * 2016-05-09 2017-11-16 ソニー株式会社 Dispositif d'affichage et appareil électronique
JP2020503637A (ja) * 2017-01-05 2020-01-30 京東方科技集團股▲ふん▼有限公司Ｂｏｅ Ｔｅｃｈｎｏｌｏｇｙ Ｇｒｏｕｐ Ｃｏ．，Ｌｔｄ． バックライトモジュール及び表示装置

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JP2008078010A (ja) * 2006-09-22 2008-04-03 Epson Imaging Devices Corp バックライトユニットおよびそれを用いた表示装置
WO2008050509A1 (fr) * 2006-10-27 2008-05-02 Sharp Kabushiki Kaisha Dispositif source de lumière, dispositif de rétroéclairage et afficheur à cristaux liquides

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JP2008078010A (ja) * 2006-09-22 2008-04-03 Epson Imaging Devices Corp バックライトユニットおよびそれを用いた表示装置
WO2008050509A1 (fr) * 2006-10-27 2008-05-02 Sharp Kabushiki Kaisha Dispositif source de lumière, dispositif de rétroéclairage et afficheur à cristaux liquides

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013178334A (ja) * 2012-02-28 2013-09-09 Sharp Corp 表示装置、及びテレビ受信装置
WO2013149407A1 (fr) * 2012-04-05 2013-10-10 深圳市华星光电技术有限公司 Module de rétroéclairage et dispositif d'affichage à cristaux liquides
WO2013166773A1 (fr) * 2012-05-10 2013-11-14 深圳市华星光电技术有限公司 Plaque de guidage de lumière dotée d'une structure fixe pour l'amortissement et la protection, et dispositif d'affichage à cristaux liquides associé
US8958030B2 (en) 2012-05-10 2015-02-17 Shenzhen China Star Optoelectronics Technology Co., Ltd. Backlight unit having buffer structures and liquid crystal display device using the same
WO2014192660A1 (fr) * 2013-05-28 2014-12-04 堺ディスプレイプロダクト株式会社 Dispositif de source de lumière et dispositif d'affichage
US9817177B2 (en) 2013-05-28 2017-11-14 Sakai Display Products Corporation Light source device and display apparatus
US20160282548A1 (en) * 2013-12-20 2016-09-29 Shenzhen China Star Optoelectronics Technology Co., Ltd. Light guide plate, method for manufacturing same and backlight module
US9715059B2 (en) * 2013-12-20 2017-07-25 Shenzhen China Star Optoelectronics Technology Co., Ltd Light guide plate, method for manufacturing same and backlight module
WO2015186638A1 (fr) * 2014-06-06 2015-12-10 シャープ株式会社 Dispositif d'affichage et dispositif récepteur de télévision
WO2017195466A1 (fr) * 2016-05-09 2017-11-16 ソニー株式会社 Dispositif d'affichage et appareil électronique
JP2020503637A (ja) * 2017-01-05 2020-01-30 京東方科技集團股▲ふん▼有限公司Ｂｏｅ Ｔｅｃｈｎｏｌｏｇｙ Ｇｒｏｕｐ Ｃｏ．，Ｌｔｄ． バックライトモジュール及び表示装置
JP7001610B2 (ja) 2017-01-05 2022-01-19 京東方科技集團股▲ふん▼有限公司 バックライトモジュール及び表示装置

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