WO2018145469A1 - 导光板、背光模组和液晶显示装置 - Google Patents

导光板、背光模组和液晶显示装置 Download PDF

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Publication number
WO2018145469A1
WO2018145469A1 PCT/CN2017/103114 CN2017103114W WO2018145469A1 WO 2018145469 A1 WO2018145469 A1 WO 2018145469A1 CN 2017103114 W CN2017103114 W CN 2017103114W WO 2018145469 A1 WO2018145469 A1 WO 2018145469A1
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WO
WIPO (PCT)
Prior art keywords
light
guide plate
light guide
display panel
plate body
Prior art date
Application number
PCT/CN2017/103114
Other languages
English (en)
French (fr)
Inventor
王大可
王征
陈秀云
Original Assignee
京东方科技集团股份有限公司
北京京东方光电科技有限公司
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 京东方科技集团股份有限公司, 北京京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US15/757,726 priority Critical patent/US20190086606A1/en
Publication of WO2018145469A1 publication Critical patent/WO2018145469A1/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • G—PHYSICS
    • G02—OPTICS
    • 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
    • G02B6/0095—Light guides as housings, housing portions, shelves, doors, tiles, windows, or the like
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • G—PHYSICS
    • G02—OPTICS
    • 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
    • G02B6/0065—Manufacturing aspects; Material aspects
    • 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
    • G02B6/0085—Means for removing heat created by the light source from 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
    • G02F1/133314—Back frames

Definitions

  • the present disclosure relates to the field of liquid crystal display technologies, and in particular, to a light guide plate, a backlight module, and a liquid crystal display device.
  • the liquid crystal display device is widely used in various fields due to its advantages of thin body, power saving, and no radiation.
  • the liquid crystal display device mainly includes a display panel and a backlight module.
  • An upper polarizer and a lower polarizer are attached to the upper and lower sides of the display panel, respectively.
  • the backlight module includes a light guide plate, a plastic frame and a back plate.
  • the light guide plate and the plastic frame are disposed in the back plate, and the plastic frame is disposed between the light guide plate and the back plate and disposed around the light guide plate.
  • the inner side wall of the plastic frame is provided with a convex structure protruding from the middle of the light guide plate, and the convex structure and the inner side wall of the plastic frame form a recess for accommodating the display panel, and the display panel is fixed in the groove and located The light emitting surface side of the light guide plate.
  • the present disclosure provides a light guide plate including a plate body and a barrier wall, a surface of the plate body is a light exit surface of the light guide plate, and the barrier wall is a An annular structure is provided at an edge of the plate body, and the blocking wall protrudes from the light emitting surface, and the plate body and the blocking wall together form a groove for accommodating the display panel and the optical film.
  • the present disclosure provides a backlight module including a light guide plate, an optical film, a back plate, and a light emitting unit.
  • the light guide plate has a light incident surface and a light exiting surface, wherein the light guide plate includes a plate body and a blocking wall, a surface of the plate body is a light emitting surface of the light guide plate, and the blocking wall is along the plate An annular structure disposed at an edge of the body, wherein the barrier wall protrudes from the light exiting surface; the plate body and the barrier wall form a recess for receiving a display panel and an optical film, the optical film
  • the light guide plate and the light emitting unit are disposed on the back plate, and the light emitting unit is disposed at a light incident surface of the light guide plate.
  • the present disclosure provides a liquid crystal display device including a display panel and a backlight module according to the present disclosure, the display panel being disposed in a recess of the light guide plate .
  • FIG. 1A is a schematic structural diagram of a light guide plate according to an embodiment of the present disclosure
  • FIG. 1B is a schematic cross-sectional view of the light guide plate of FIG. 1A taken along line A-A;
  • FIG. 1C is a schematic cross-sectional view of the light guide plate of FIG. 1A taken along line B-B;
  • FIG. 2A is a schematic structural diagram of another light guide plate according to an embodiment of the present disclosure.
  • FIG. 2B is a schematic cross-sectional view of the light guide plate of FIG. 2A taken along line A-A;
  • FIG. 2C is a schematic cross-sectional view of the light guide plate of FIG. 2A taken along line B-B;
  • 3A is a schematic structural diagram of a backlight module according to an embodiment of the present disclosure.
  • 3B is a cross-sectional view of the backlight module of FIG. 3A taken along line A-A;
  • 3C is a cross-sectional view of the backlight module of FIG. 3A taken along line B-B;
  • FIG. 4A is a schematic structural diagram of another backlight module according to an embodiment of the present disclosure.
  • FIG. 4B is a cross-sectional view of the backlight module of FIG. 4A taken along line A-A;
  • 4C is a cross-sectional view of the backlight module of FIG. 4A taken along line B-B;
  • FIG. 5 is a schematic structural diagram of a liquid crystal display device according to an embodiment of the present disclosure.
  • FIG. 1A is a schematic structural diagram of a light guide plate according to an embodiment of the present disclosure
  • FIG. 1B and FIG. 1C are respectively FIG. 1A.
  • the light guide plate 1 includes a plate body 10 and a blocking wall 11.
  • One surface of the plate body 10 is a light emitting surface 12 of the light guide plate 1.
  • the blocking wall 11 is protruded from the light emitting surface 12, and the blocking wall is disposed.
  • 11 is an annular structure provided along the edge of the plate body 10 (see Fig. 1A).
  • the plate body 10 and the barrier wall 11 form a recess 13 for accommodating the display panel and the optical film.
  • the embodiment of the present disclosure provides a retaining wall having an annular structure on the light emitting surface of the light guide plate, the retaining wall and the plate body forming a recess for accommodating the display panel and the optical film, so that the display panel and the optical film can be guided by the light guide plate.
  • the fixed support eliminates the need to use other structures such as plastic frames to mount the display panel, thereby avoiding the problem that the structure such as the plastic frame is poorly pressed by the display panel due to low temperature shrinkage.
  • the plate body 10 and the retaining wall 11 are of a unitary structure and can be formed by an injection molding process.
  • the light guide plate 1 may be made of an organic material or an inorganic material such as glass, which is not limited in the present disclosure.
  • the side wall 10a of the board body 10 is provided with a light-emitting unit mounting groove 14 for accommodating the light-emitting unit.
  • the light-emitting unit mounting groove 14 is defined on the side wall 10a of the plate body 10.
  • the light-emitting unit is disposed in the light-emitting unit mounting groove 14 so as to be embedded in the plate body 10, which is advantageous for achieving a narrow frame.
  • the light-emitting unit mounting groove 14 is disposed on the side wall 10a of the board body 10, and the light enters from the side wall 10a of the light guide plate body 10, and the light of the display panel is received.
  • the method is a side-entry single-edge light-in method.
  • the side-entry light-in method also includes a bilateral light-into-light mode, and both the single-edge light input and the double-edge light input may adopt a long-edge light input or a short-edge light input.
  • the light-emitting unit mounting groove 14 can also be disposed according to the light-input manner of the display panel.
  • the opposite sides of the light guide plate body 10 can be disposed.
  • a light unit mounting groove 14 is provided on the wall.
  • the light-emitting unit mounting groove 14 may be disposed on the side wall of the long side of the light guiding plate body 10.
  • the light emitting unit mounting groove may be disposed on the side wall of the short side of the light guide plate body 10, which is not limited in the disclosure.
  • FIG. 2A is a schematic structural view of another light guide plate according to an embodiment of the present disclosure
  • FIG. 2B and FIG. 2C are respectively a schematic cross-sectional view of the light guide plate shown in FIG. 2A along line A-A and a cross-sectional view taken along line B-B.
  • the light guide plate 2 includes a plate body 20 and a blocking wall 21.
  • One surface of the plate body 20 is a light emitting surface 22 of the light guide plate 2, and the blocking wall 21 is protruded from the light emitting surface 22, and the blocking wall is disposed.
  • 21 is an annular structure provided along the edge of the plate body 20 (see Fig. 2A).
  • the inner wall 21a of the retaining wall 21 is provided with an annular step portion 23 extending from the light-emitting surface 22, and the step portion 23 and the retaining wall 21 form a first recess 24 for accommodating the display panel, the step The portion 23 and the plate body 20 form a second recess 25 for accommodating the optical film.
  • the display panel and the optical film are respectively placed in the two grooves, so that the display can be made Solidification of panels and optical films It is more stable and can be applied to in-vehicle equipment where the driving environment is relatively harsh and the stability of the display panel is high.
  • the display panel and the optical film can be fixedly supported by the light guide plate, and the display panel is not required to be mounted by using the plastic frame, thereby avoiding the problem that the low temperature shrinkage of the plastic frame and the display panel cause the polarizer to be defective.
  • the step portion 23 has a top surface 23a and a side surface 23b, wherein the step portion top surface 23a and the inner wall 21a of the barrier wall 21 form a first recess 24 for accommodating the display panel
  • the step side surface 23b and the plate body 20 form a second recess 25 for accommodating the optical film.
  • the plate body 20, the retaining wall 21 and the step portion 23 are of a unitary structure and can be formed by an injection molding process.
  • the light guide plate 2 may be made of an organic material or a glass light guide plate, which is not limited in the present disclosure.
  • the opposite side walls of the second recess 25 (i.e., on the step portion 23) are provided with a limiting groove 25a for fixing the optical film.
  • the limiting groove 25a enables the optical film to be fixed on the opposite side walls of the second groove 25 while also functioning as an anti-reflection.
  • the limiting slot 25a can be set one or more according to actual conditions.
  • the side wall 20a of the board body 20 is provided with a light-emitting unit mounting groove 26 for accommodating the light-emitting unit.
  • the light-emitting unit mounting groove 26 is defined on the side wall 20a of the plate body 20.
  • the light-emitting unit is disposed in the light-emitting unit mounting groove 26 so as to be embedded in the plate body 20, which is advantageous for realizing a narrow frame.
  • the light-emitting unit mounting groove 26 is disposed on the side wall 20a of the plate body 20, and the light enters from the side wall 20a of the light guide plate body 20, and the light entering the display panel
  • the method is a side-entry single-edge light-in method.
  • the side-entry light-in method also includes a bilateral light-into-light mode, and both the single-edge light input and the double-edge light input may adopt a long-edge light input or a short-edge light input.
  • the light-emitting unit mounting groove 26 can also be disposed according to the light-input manner of the display panel.
  • the opposite sides of the light guide plate body 20 can be disposed.
  • a light unit mounting groove 26 is provided on the wall.
  • the light emitting unit mounting groove 26 may be provided on the side wall of the long side of the light guide plate body 20.
  • the light emitting unit mounting groove 26 may be disposed on the side wall of the short side of the light guide plate body 20, which is not limited in the present disclosure.
  • limiting slot 25a on the light guide plate body 20 may be disposed on a side of the light guide plate without the light unit mounting groove 26.
  • FIG. 3A is a schematic structural view of a backlight module according to an embodiment of the present disclosure.
  • FIG. 3B and FIG. 3C are respectively a cross-sectional view of the backlight module shown in FIG. 3A along line A-A and a cross-sectional view taken along line B-B.
  • the backlight module 3 includes a light guide plate 30 , an optical film 31 , a back plate 32 , and a light emitting unit 33 .
  • the light guide plate 30 has a light incident surface 30a and a light exit surface 30b.
  • the light guide plate 30 includes a plate body 301 and a barrier wall 302.
  • One side of the plate body 301 is a light exit surface 30b of the light guide plate 30, and the barrier wall 302 protrudes from the light exit surface 30b. And the retaining wall 302 is along the side of the plate body 301 The ring structure of the edge setting.
  • the plate body 301 and the blocking wall 302 form a recess 303 for accommodating the display panel and the optical film 31.
  • the optical film 31 is disposed in the recess 303 and is in contact with the light emitting surface 30b.
  • the light guide plate 30 and the light emitting unit 33 are disposed on the back plate 32, and the light emitting unit 33 is disposed at the light incident surface 30a of the light guide plate 30.
  • the light-emitting surface of the light guide plate is provided with a ring-shaped structure, and the barrier wall and the plate body form a recess for accommodating the display panel and the optical film, thereby displaying the panel and the optical
  • the film material can be fixedly supported by the light guide plate, and the display panel is not required to be mounted by using the plastic frame, thereby avoiding the problem that the pressure frame is poorly caused by the low temperature shrinkage of the plastic frame and the display panel.
  • the plate body 301 and the retaining wall 302 are of a unitary structure and can be formed by an injection molding process.
  • the light guide plate 30 may be made of an organic material or a glass light guide plate, which is not limited in the present disclosure.
  • the optical film 31 includes, but is not limited to, a brightness enhancement sheet, a diffusion sheet, and the like, and may be disposed according to actual needs, which is not limited in the disclosure.
  • the side wall 301a of the board body 301 is provided with a light unit mounting groove 304 for accommodating the light emitting unit 33.
  • the light-emitting unit mounting groove 304 is defined on the side wall 301a of the plate body 301.
  • the light-emitting unit 33 is disposed in the light-emitting unit mounting groove 304 so as to be embedded in the plate body 301, which is advantageous for achieving a narrow frame.
  • the light-emitting unit mounting groove 304 is disposed on the side wall 301a of the plate body 301, and the light enters from the side wall 301a of the light guide plate body 301, and the light entering the display panel
  • the method is a side-entry single-edge light-in method.
  • the side-entry light-in method also includes a bilateral light-into-light mode, and both the single-edge light input and the double-edge light input may adopt a long-edge light input or a short-edge light input.
  • the light-emitting unit mounting groove 304 can also be disposed according to the light-input manner of the display panel.
  • the opposite sides of the light guide plate body 301 can be disposed.
  • a light unit mounting groove 304 is provided on the wall.
  • the light-emitting unit mounting groove 304 may be disposed on the side wall of the long side of the light guiding plate body 301.
  • the light-emitting unit mounting groove 304 may be disposed on the sidewall of the short side of the light guide plate body 301, which is not limited in the present disclosure.
  • an elastic light absorbing layer 34 is further disposed on the inner wall 303a of the recess 303.
  • the optical film 31 is disposed in the groove 303 and is in contact with the light-emitting surface 30b.
  • the elastic light-absorbing layer 34 is disposed on a portion of the groove 303 where the inner wall 303a is not in contact with the optical film 31.
  • the elastic light absorbing layer 34 is disposed in the recess 303 for limiting and fixing the display panel and the optical film 31, and the elastic light absorbing layer 34 prevents the display panel from directly contacting the light guide plate 30, thereby buffering and buffering. It can also absorb light to prevent light from leaking around and cause bright lines on the display panel.
  • the elastic light absorbing layer 34 may be a black rubber layer. It should be noted that in the embodiment, the elastic suction The light layer 34 is made of a black rubber material, and in other embodiments, it may be a superposition of a separate elastic layer and a light absorbing layer, which is not limited in the present disclosure.
  • the optical film 31 can be fixed and fixed by the elastic light absorbing layer 34, or can be adhered and fixed by the double-sided tape and the light-emitting surface 30b, and the display panel can be locked in the groove of the light guide plate 30 through the elastic light-absorbing layer 34.
  • the elastic light absorbing layer 34 can be adhered and fixed, and the embodiment of the present disclosure does not limit this.
  • the backlight module 3 further includes an elastic light absorbing structure 35 disposed at the top of the barrier wall 302.
  • the elastic light absorbing structure 35 is disposed on the top of the barrier wall 302.
  • the elastic light absorbing structure 35 can absorb the light emitted from the top of the barrier wall 302 to prevent light from being emitted from the top of the light guide plate 30, thereby preventing the occurrence of bright lines.
  • the elastic light absorbing structure 35 can prevent the display panel and the frame from directly contacting and scratching after the display panel and the frame are assembled, and the elastic light absorbing structure 35 can also play a certain buffering effect when the frame is subjected to an external force to avoid L0 leakage. .
  • the elastic light absorbing structure 35 may be a black foam.
  • the black foam is a polyurethane foam
  • the compression ratio may be 60% to 70%, for example, 70%.
  • the frame is subjected to an external force to provide a certain buffering effect to avoid leakage of L0.
  • the elastic light absorbing layer 35 is a black foam material, and in other embodiments, a separate elastic layer and a light absorbing layer may be stacked, which is not limited in the present disclosure.
  • the backlight module 3 further includes a reflective sheet 36 disposed on the light guiding surface 30c and the sidewall of the light guide plate 30.
  • the light guiding surface 30c of the light guiding plate 30 is opposite to the light emitting surface 30b of the board 301. The side.
  • a reflective sheet 36 is disposed on the light guiding surface 30c and the sidewall of the light guide plate 30.
  • the reflective sheet 36 reflects the light emitted from the light guide plate 30 back into the light guide plate 30 to improve the utilization of light.
  • FIG. 4A is a schematic structural view of another backlight module according to an embodiment of the present disclosure.
  • FIG. 4B and FIG. 4C are respectively a cross-sectional view of the backlight module shown in FIG. 4A along line A-A and a cross-sectional view taken along line B-B.
  • the backlight module 4 includes a light guide plate 40 , an optical film 41 , a back plate 42 , and a light emitting unit 43 .
  • the light guide plate 40 has a light-incident surface 40a and a light-emitting surface 40b.
  • the light guide plate 40 includes a plate body 401 and a barrier wall 402.
  • One side of the plate body 401 is a light-emitting surface 40b of the light guide plate 40, and the barrier wall 402 protrudes from the light-emitting surface 40b.
  • the retaining wall 402 is an annular structure disposed along the edge of the plate body 401.
  • the inner wall of the retaining wall 402 is provided with a step portion 403 extending from the light-emitting surface 40b, and the step portion 403 and the retaining wall 402 form a first recess 404 for accommodating the display panel, the step portion 403 and the plate
  • the body 401 forms a second recess 405 for receiving the optical film 41.
  • Forming a step portion to form a first recess for accommodating the display panel and a second recess for accommodating the optical film The groove and the display panel and the optical film are respectively placed in the two grooves, which can make the fixing of the display panel and the optical film material more stable, can be applied to the driving environment, and has high requirements on the stability of the display panel. In-vehicle equipment. Moreover, the display panel and the optical film material can be fixedly supported by the light guide plate, and the display panel is not required to be mounted by using the plastic frame, thereby avoiding the low temperature shrinkage of the plastic frame and pressing the display panel to cause the polarizer to be defective, so that the display panel has four corners of blue and four white spots. problem. At the same time, the design without the frame is greatly reduced the production cost of the display device.
  • the step portion 403 has a top surface 403a and a side surface 403b, wherein the step top surface 403a and the inner wall 402a of the barrier wall 402 form a first recess 404 for accommodating the display panel, and the step side surface 403b forms a plate body 401 a second recess 405 for receiving the optical film.
  • the plate body 401, the retaining wall 402 and the step portion 403 are of a unitary structure and can be formed by an injection molding process.
  • the light guide plate 40 may be made of an organic material or a glass light guide plate, which is not limited in the present disclosure.
  • the side wall 401a of the board body 401 is provided with a light-emitting unit mounting groove 406 for accommodating the light-emitting unit 43.
  • the light-emitting unit mounting groove 406 is defined on the side wall 401a of the plate body 401.
  • the light-emitting unit 43 is disposed in the light-emitting unit mounting groove 406 so as to be embedded in the plate body 401, which is advantageous for realizing a narrow frame.
  • the light-emitting unit mounting groove 406 is disposed on the side wall 401a of the board body 401, and the light enters from the side wall 401a of the light guide plate body 401, and the light of the display panel is received.
  • the method is a side-entry single-edge light-in method.
  • the side-entry light-in method also includes a bilateral light-into-light mode, and both the single-edge light input and the double-edge light input may adopt a long-edge light input or a short-edge light input.
  • the light emitting unit mounting groove 406 can also be disposed according to the light entering mode of the display panel.
  • the opposite sides of the light guide plate body 401 can be disposed.
  • a light unit mounting groove 406 is provided on the wall.
  • the light-emitting unit mounting groove 406 may be disposed on the side wall of the long side of the light guide plate body 401.
  • the light emitting unit mounting groove 406 may be disposed on the side wall of the short side of the light guide plate body 401, which is not limited in the present disclosure.
  • the light-emitting unit mounting groove 406 is defined on the side wall 401a of the plate body 401, and the light-emitting unit 43 is disposed in the light-emitting unit mounting groove 406 so as to be embedded in the plate body 401, so that the narrow frame can be disposed.
  • the opposite sidewalls of the second recess 405 are provided with a limiting slot 405a for fixing the optical film 41, and the optical film is provided.
  • the opposite side edges 41a of the 41 are provided with a lug structure that cooperates with the limiting groove 405a.
  • a plurality of limiting slots 405a for fixing the optical film 41 are disposed on opposite sidewalls of the second recess 405 according to actual conditions, and the two opposite sides of the optical film 41 are disposed.
  • the side 41a is provided with a plurality of lug structures that cooperate with the limiting slots 405a, which is not limited in the present disclosure.
  • the limiting groove 405a and the lug structure matched with the limiting groove 405a enable the optical film 41 to be fixed on the opposite side walls of the second groove 405, and also prevent The opposite effect.
  • the inner wall of the first recess 404 is further provided with an elastic light absorbing layer 44.
  • the inner wall of the first recess 404 includes a step top surface 403a and an inner wall 402a of the retaining wall 402.
  • the elastic light absorbing layer 44 is disposed on the first recess 404 formed by the step top surface 403a and the inner wall 402a of the retaining wall 402.
  • the inner wall can be used for limiting and fixing the display panel and the optical film 41, and the elastic light absorbing layer 44 can prevent the display panel from directly contacting the light guide plate 40, thereby buffering and absorbing light to prevent light from being blocked. Leaking around causes a bright line to appear on the display panel.
  • the material of the elastic light absorbing layer 44 may be black rubber.
  • the elastic light absorbing layer 44 is made of a black rubber material, and in other embodiments, it may be a superposition of a separate elastic layer material and a light absorbing layer material, which is not limited in the disclosure.
  • the backlight module 4 further includes an elastic light absorbing structure 45 disposed at the top of the barrier wall 402.
  • the elastic light absorbing structure 45 is disposed on the top of the barrier wall 402.
  • the elastic light absorbing structure 45 can absorb the light emitted from the top of the barrier wall 402 to prevent light from being emitted from the top of the light guide plate 40, thereby preventing the occurrence of bright lines.
  • the elastic light absorbing structure 45 can prevent the display panel and the frame from directly contacting and scratching after the display panel and the frame are assembled, and the elastic light absorbing structure 45 can also play a certain buffering effect when the frame is subjected to an external force to avoid L0 leakage. .
  • the elastic light absorbing structure 45 is a black foam.
  • the black foam is a polyurethane foam
  • the compression ratio may be 60% to 70%, for example, 70%.
  • the elastic light absorbing layer 45 is selected from a black foam material, and in other embodiments, a separate elastic layer material and a light absorbing layer material may be superimposed. limit.
  • the light guide surface 40c disposed on the light guide surface 40c of the light guide plate 40 and the side surface of the light guide plate 40 is a side surface of the plate body 401 opposite to the light exit surface 40b.
  • the embodiment of the present disclosure provides a liquid crystal display device, as shown in FIG. 5, which may include a display panel 50 and a backlight module 51.
  • the display panel 50 is disposed in a recess of the light guide plate 511 of the backlight module 51.
  • the display module 51 can be the backlight module shown in FIGS. 3A-3C or the backlight module shown in FIGS. 4A-4C.
  • the light-emitting surface of the light guide plate is provided with a ring-shaped structure, and the barrier wall and the plate body form a recess for accommodating the display panel and the optical film, thereby displaying the panel and
  • the optical film can be fixedly supported by the light guide plate, and the display panel is not required to be mounted by using the plastic frame, thereby avoiding the problem that the low temperature shrinkage of the plastic frame and the display panel cause the polarizer to be defective.
  • the display panel 50 can be affixed to the recess of the light guide plate 511 through the elastic light absorbing layer 512 of the backlight module 51, and can be affixed and fixed to the elastic light absorbing layer 512.
  • This embodiment of the present disclosure does not limit this.
  • the liquid crystal display device further includes:
  • the frame 52 and the frame 52 are mounted on the back plate 513, and the display panel 50 is located between the frame 52 and the backlight module 51.
  • the gap between the bezel 52 and the display panel 50 in a direction perpendicular to the display panel 50 may be 0.2 mm to 0.3 mm.
  • the gap size can be solved.
  • the frame 52 will squeeze the display panel 50 to increase the light leakage of L0.
  • the gap between the frame 52 and the frame is too large, foreign matter will be generated between the frame 52 and the display panel 50. The problem.
  • the liquid crystal display device may be any product or component having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.

Abstract

一种导光板（1）、背光模组和液晶显示装置。导光板（1）包括：板体（10）和挡壁（11），板体（10）的一侧面为导光板（1）的出光面（12），挡壁（11）凸出于出光面（12）设置，且挡壁（11）为沿板体（10）的边缘设置的环形结构；板体（10）和挡壁（11）形成用于容置显示面板和光学膜材的凹槽（13）。解决了胶框低温收缩挤压显示面板造成偏光片不良的问题。

Description

导光板、背光模组和液晶显示装置
交叉引用
本公开要求于2017年2月8日提交的申请号为201710069267.X的中国专利申请的优先权，该中国专利申请的全部内容通过引用全部并入本文。
技术领域
本公开涉及液晶显示技术领域，特别涉及一种导光板、背光模组和液晶显示装置。
背景技术
液晶显示装置由于具有机身薄、省电及无辐射等优点，被广泛应用在各个领域。
液晶显示装置主要包括显示面板和背光模组。显示面板的上下方分别粘贴固定有上偏光片和下偏光片。该背光模组包括导光板、胶框和背板。导光板和胶框设置在背板内，胶框位于导光板和背板之间且围绕导光板设置。胶框的内侧壁上设有向导光板的中部凸出的凸起结构，该凸起结构与胶框的内侧壁形成用于容置显示面板的凹槽，显示面板固定在该凹槽中且位于导光板的出光面一侧。
应当注意，提供在上述背景部分中公开的信息仅用于更好地理解本公开的背景，并且因此可以包含未形成那些本领域技术人员已知的现有技术的信息。
发明内容
根据本公开的一个方面，本公开提供了一种导光板，所述导光板包括板体和挡壁，所述板体的一表面为所述导光板的出光面，所述挡壁为沿所述板体的边缘设置的环形结构，且所述挡壁凸出于所述出光面，所述板体和所述挡壁共同形成一用于容置显示面板和光学膜材的凹槽。
根据本公开的另一个方面，本公开提供了一种背光模组，所述背光模组包括导光板、光学膜材、背板以及发光单元。所述导光板具有入光面和出光面，其中，所述导光板包括板体和挡壁，所述板体的一表面为所述导光板的出光面，所述挡壁为沿所述板体的边缘设置的环形结构，且所述挡壁突出于所述出光面；所述板体和所述挡壁形成用于容置一显示面板和一光学膜材的凹槽，所述光学膜材设于所述凹槽内且与所述出光面贴合；所述导光板和所述发光单元设置在所述背板上，所述发光单元设置在所述导光板的入光面处。
根据本公开的另一个方面，本公开提供了一种液晶显示装置，所述液晶显示面板包括显示面板和本公开所述的背光模组，所述显示面板设置在所述导光板的凹槽内。
应当理解，前面的一般描述和以下详细描述都仅是示例性和说明性的，而不是用于限制本公开。
本节提供本公开中描述的技术的各种实现或示例的概述，并不是所公开技术的全部范围或所有特征的全面公开。
附图说明
为了更清楚地说明本公开实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1A是本公开实施例提供的一种导光板的结构示意图；
图1B是图1A所示导光板沿A-A线的截面示意图；
图1C是图1A所示导光板沿B-B线的截面示意图；
图2A是本公开实施例提供的另一种导光板的结构示意图；
图2B是图2A所示导光板沿A-A线的截面示意图；
图2C是图2A所示导光板沿B-B线的截面示意图；
图3A是本公开实施例提供的一种背光模组的结构示意图；
图3B是图3A所示背光模组沿A-A线的截面示意图；
图3C是图3A所示背光模组沿B-B线的截面示意图；
图4A是本公开实施例提供的另一种背光模组的结构示意图；
图4B是图4A所示背光模组的沿A-A线的截面示意图；
图4C是图4A所示背光模组的沿B-B线的截面示意图；以及
图5是本公开实施例提供的一种液晶显示装置的结构示意图。
具体实施方式
为使本公开的目的、技术方案和优点更加清楚，下面将结合附图对本公开实施方式作进一步地详细描述。
图1A是本公开实施例提供的一种导光板的结构示意图，图1B和图1C分别是图1A 所示的导光板沿A-A线的截面示意图和沿B-B线的截面示意图。如图1A-1C所示，该导光板1包括板体10和挡壁11，板体10的一表面为导光板1的出光面12，挡壁11凸出于出光面12设置，且挡壁11为沿板体10的边缘设置的环形结构(见图1A)。板体10和挡壁11形成用于容置显示面板和光学膜材的凹槽13。
本公开实施例通过在导光板的出光面设置呈环形结构的挡壁，该挡壁与板体形成用于容置显示面板和光学膜材的凹槽，从而显示面板和光学膜材可由导光板固定支撑，无需使用其他结构例如胶框等安装显示面板，进而避免了胶框等结构由于低温收缩挤压显示面板造成偏光片不良的问题。
可选地，板体10和挡壁11为一体式结构，可采用注塑成型的工艺制成。导光板1可以由有机材料制成，也可以采用玻璃等无机材料制成，本公开对此不做限制。
在一实施例中，如图1C所示，该板体10的侧壁10a上设有用于容置发光单元的发光单元安装槽14。该发光单元安装槽14开设在板体10的侧壁10a上，发光单元设置在发光单元安装槽14内，从而可以内嵌于板体10中，有利于实现窄边框。
需要说明的是，在图1C所示实施例中，发光单元安装槽14设置在板体10的侧壁10a上，此时光线从导光板板体10的侧壁10a进入，显示面板的入光方式为侧入式的单边入光方式。其中侧入式入光方式还包括双边入光方式，单边入光和双边入光均可以采用长边入光或短边入光。在其他实施例中，发光单元安装槽14也可以根据显示面板的入光方式进行设置，例如，当显示面板的入光方式为双边入光时，可在导光板板体10的相对的两侧壁上设置发光单元安装槽14。进一步地，当显示面板的入光方式为长边入光时，可在导光板板体10的长边的侧壁上设置发光单元安装槽14。当显示面板的入光方式为短边入光时，可在导光板板体10的短边的侧壁上设置发光单元安装槽，本公开对此不做限制。
图2A是本公开实施例提供的另一种导光板的结构示意图，图2B和图2C分别是图2A所示的导光板沿A-A线的截面示意图和沿B-B线的截面示意图。如图2A-2C所示，该导光板2包括板体20和挡壁21，板体20的一表面为导光板2的出光面22，挡壁21凸出于出光面22设置，且挡壁21为沿板体20的边缘设置的环形结构(见图2A)。
在一实施例中，挡壁21的内壁21a上设有从出光面22延伸出的环形的台阶部23，台阶部23与挡壁21形成用于容置显示面板的第一凹槽24，台阶部23与板体20形成用于容置光学膜材的第二凹槽25。
通过设置台阶部从而形成用于容置显示面板的第一凹槽和用于容置光学膜材的第二凹槽，将显示面板和光学膜材分别放置在两个凹槽中，可以使得显示面板和光学膜材的固 定更加稳固，可应用于行车环境较为恶劣，对显示面板的稳定性要求较高的车载设备中。且显示面板和光学膜材可由导光板固定支撑，无需使用胶框安装显示面板，进而避免了胶框低温收缩挤压显示面板造成偏光片不良的问题。
具体地，如图2B和图2C所示，台阶部23具有顶面23a和侧面23b，其中，台阶部顶面23a与挡壁21的内壁21a形成用于容置显示面板的第一凹槽24，台阶部侧面23b与板体20形成用于容置光学膜材的第二凹槽25。
可选地，板体20、挡壁21和台阶部23为一体式结构，可采用注塑成型的工艺制成。导光板2可以由有机材料制成，也可以采用玻璃导光板，本公开对此不做限制。
在一实施例中，如图2A所示，第二凹槽25的相对的两侧壁上(即台阶部23上)开设有用于固定光学膜材的限位槽25a。该限位槽25a使光学膜材能固定在第二凹槽25的相对两侧壁上，同时还起到防反的作用。实际应用中，该限位槽25a可根据实际情况设置一个或多个。
在一实施例中，如图2C所示，该板体20的侧壁20a上设有用于容置发光单元的发光单元安装槽26。该发光单元安装槽26开设在板体20的侧壁20a上，发光单元设置在发光单元安装槽26内，从而可以内嵌于板体20中，有利于实现窄边框。
需要说明的是，在图2C所示实施例中，发光单元安装槽26设置在板体20的侧壁20a上，此时光线从导光板板体20的侧壁20a进入，显示面板的入光方式为侧入式的单边入光方式。其中侧入式入光方式还包括双边入光方式，单边入光和双边入光均可以采用长边入光或短边入光。在其他实施例中，发光单元安装槽26也可以根据显示面板的入光方式进行设置，例如，当显示面板的入光方式为双边入光时，可在导光板板体20的相对的两侧壁上设置发光单元安装槽26。当显示面板的入光方式为长边入光时，可在导光板板体20的长边的侧壁上设置发光单元安装槽26。当显示面板的入光方式为短边入光时，可在导光板板体20的短边的侧壁上设置发光单元安装槽26，本公开对此不做限制。
需要说明的是，导光板板体20上的限位槽25a可以设置在导光板无发光单元安装槽26的一侧。
图3A是本公开实施例提供的一种背光模组的结构示意图，图3B和图3C分别是图3A所示的一种背光模组沿A-A线的截面示意图和沿B-B线的截面示意图。如图3A-3C所示，该背光模组3包括：导光板30、光学膜材31、背板32以及发光单元33。导光板30具有入光面30a和出光面30b，导光板30包括板体301和挡壁302，板体301的一侧面为导光板30的出光面30b，挡壁302突出于出光面30b设置，且挡壁302为沿板体301的边 缘设置的环形结构。板体301和挡壁302形成用于容置显示面板和光学膜材31的凹槽303，光学膜材31设于凹槽303内且与出光面30b贴合。导光板30和发光单元33设置在背板32上，发光单元33设置在导光板30的入光面30a处。
本公开实施例提供的背光模组中，导光板的出光面设置呈环形结构的挡壁，该挡壁与板体形成用于容置显示面板和光学膜材的凹槽，从而显示面板和光学膜材可由导光板固定支撑，无需使用胶框安装显示面板，进而避免了胶框低温收缩挤压显示面板造成偏光片不良的问题。
可选地，板体301和挡壁302为一体式结构，可采用注塑成型的工艺制成。导光板30可以由有机材料制成，也可以采用玻璃导光板，本公开对此不做限制。
可选地，光学膜材31包括但不限于增光片和扩散片等，可以根据实际需要设置，本公开对此不作限制。
在一实施例中，板体301的侧壁301a上设有用于容置发光单元33的发光单元安装槽304。该发光单元安装槽304开设在板体301的侧壁301a上，发光单元33设置在发光单元安装槽304内，从而可以内嵌于板体301中，有利于实现窄边框。
需要说明的是，在图3C所示实施例中，发光单元安装槽304设置在板体301的侧壁301a上，此时光线从导光板板体301的侧壁301a进入，显示面板的入光方式为侧入式的单边入光方式。其中侧入式入光方式还包括双边入光方式，单边入光和双边入光均可以采用长边入光或短边入光。在其他实施例中，发光单元安装槽304也可以根据显示面板的入光方式进行设置，例如，当显示面板的入光方式为双边入光时，可在导光板板体301的相对的两侧壁上设置发光单元安装槽304。进一步地，当显示面板的入光方式为长边入光时，可在导光板板体301的长边的侧壁上设置发光单元安装槽304。当显示面板的入光方式为短边入光时，可在导光板板体301的短边的侧壁上设置发光单元安装槽304，本公开对此不做限制。
在一实施例中，如图3B和图3C所示，凹槽303内壁303a上还设有弹性吸光层34。
具体的，光学膜材31设于凹槽303内且与出光面30b贴合，弹性吸光层34设于凹槽303内壁303a未与光学膜材31接触的部分。在凹槽303内设置弹性吸光层34可用于对显示面板和光学膜材31进行限位固定，且该弹性吸光层34可防止显示面板与导光板30直接接触刮伤，起到缓冲作用，同时还可以吸光，防止光线从四周漏出导致显示面板上出现亮线。
可选地，弹性吸光层34可以为黑色橡胶层。需要说明的是，在本实施例中该弹性吸 光层34选用的是黑色橡胶材料，在其它实施例中也可为单独的弹性层和吸光层的叠加，本公开对此不做限制。
具体的，光学膜材31可通过弹性吸光层34限位固定，也可通过双面胶与出光面30b粘贴固定，显示面板可通过弹性吸光层34卡设于导光板30的凹槽中，也可与弹性吸光层34粘贴固定，本公开实施例对此不做限制。
在一实施例中，如图3B和3C所示，该背光模组3还包括设置在挡壁302的顶部的弹性吸光结构35。
具体的，弹性吸光结构35设置在挡壁302顶部，该弹性吸光结构35可以吸收从挡壁302顶部射出的光线，防止光从导光板30的顶部射出，从而防止出现亮线。同时弹性吸光结构35可以在显示面板和边框组装完成后，避免显示面板和边框直接接触划伤，并且，该弹性吸光结构35还可以在边框受到外力时起到一定的缓冲作用，避免出现L0漏光。
在一实施例中，弹性吸光结构35可以为黑色泡棉。
可选地，黑色泡棉为聚氨酯材质泡棉，压缩比可以为60％～70％，例如为70％。通过设置压缩比为70％的黑色泡棉，使边框受到外力时起到一定的缓冲作用，避免出现L0漏光。需要说明的是，在本实施例中该弹性吸光层35选用的是黑色泡棉材料，在其它实施例中也可为单独的弹性层和吸光层的叠加，本公开对此不做限制。
在一实施例中，该背光模组3还包括设置在导光板30的导光面30c和侧壁上的反射片36，导光板30的导光面30c为板体301的与出光面30b相对的侧面。
具体的，在导光板30的导光面30c和侧壁上设置反射片36，反射片36可将导光板30向外射出的光反射回导光板30中，提高光线的利用率。
图4A是本公开实施例提供的另一种背光模组的结构示意图，图4B和图4C分别是图4A所示的背光模组沿A-A线的截面示意图和沿B-B线的截面示意图。如图4A-4C所示，该背光模组4包括：导光板40、光学膜材41、背板42以及发光单元43。导光板40具有入光面40a和出光面40b，导光板40包括板体401和挡壁402，板体401的一侧面为导光板40的出光面40b，挡壁402突出于出光面40b设置，且挡壁402为沿板体401的边缘设置的环形结构。
在一实施例中，挡壁402的内壁设有从出光面40b延伸出的台阶部403，台阶部403与挡壁402形成用于容置显示面板的第一凹槽404，台阶部403与板体401形成用于容置光学膜材41的第二凹槽405。
通过设置台阶部从而形成用于容置显示面板的第一凹槽和用于容置光学膜材的第二 凹槽，将显示面板和光学膜材分别放置在两个凹槽中，可以使得显示面板和光学膜材的固定更加稳固，可应用于行车环境较为恶劣，对显示面板的稳定性要求较高的车载设备中。且显示面板和光学膜材可由导光板固定支撑，无需使用胶框安装显示面板，进而避免了胶框低温收缩挤压显示面板造成偏光片不良，使得显示面板出现四角发蓝，四角白斑等现象的问题。同时无胶框的设计大大降低了显示装置的生产成本。
具体地，台阶部403具有顶面403a和侧面403b，其中台阶部顶面403a与挡壁402的内壁402a形成用于容置显示面板的第一凹槽404，台阶部侧面403b与板体401形成用于容置光学膜材的第二凹槽405。
可选地，板体401、挡壁402和台阶部403为一体式结构，可采用注塑成型的工艺制成。导光板40可以由有机材料制成，也可以采用玻璃导光板，本公开对此不做限制。
在一实施例中，如图4B所示，该板体401的侧壁401a上设有用于容置发光单元43的发光单元安装槽406。该发光单元安装槽406开设在板体401的侧壁401a上，发光单元43设置在发光单元安装槽406内，从而可以内嵌于板体401中，有利于实现窄边框。
需要说明的是，在图4B所示实施例中，发光单元安装槽406设置在板体401的侧壁401a上，此时光线从导光板板体401的侧壁401a进入，显示面板的入光方式为侧入式的单边入光方式。其中侧入式入光方式还包括双边入光方式，单边入光和双边入光均可以采用长边入光或短边入光。在其他实施例中，发光单元安装槽406也可以根据显示面板的入光方式进行设置，例如，当显示面板的入光方式为双边入光时，可在导光板板体401的相对的两侧壁上设置发光单元安装槽406。当显示面板的入光方式为长边入光时，可在导光板板体401的长边的侧壁上设置发光单元安装槽406。当显示面板的入光方式为短边入光时，可在导光板板体401的短边的侧壁上设置发光单元安装槽406，本公开对此不做限制。该发光单元安装槽406开设在板体401的侧壁401a上，发光单元43设置在发光单元安装槽406内，从而内嵌于板体401中，可以实现窄边框的设置。
在一实施例中，如图4A所示，第二凹槽405的相对的两侧壁(即台阶部403上)上开设有一个用于固定光学膜材41的限位槽405a，光学膜材41的两相对的侧边41a设有一个与限位槽405a配合的凸耳结构。在其它实施例中，可根据实际情况，设置在第二凹槽405的相对的两侧壁上设置多个用于固定光学膜材41的限位槽405a，在光学膜材41的两相对的侧边41a设置多个与限位槽405a配合的凸耳结构，本公开对此不做限制。
具体的，在本实施例中，限位槽405a以及与限位槽405a配合的凸耳结构，使光学膜材41能固定在第二凹槽405的相对两侧壁上，同时还起到防反的作用。
在一实施例中，如图4B和图4C所示，第一凹槽404的内壁上还设有弹性吸光层44。
具体的，第一凹槽404的内壁包括台阶部顶面403a与挡壁402的内壁402a，弹性吸光层44设于台阶部顶面403a与挡壁402的内壁402a构成的第一凹槽404的内壁上，可用于对显示面板和光学膜材41进行限位固定，且该弹性吸光层44可防止显示面板与导光板40直接接触刮伤，起到缓冲作用，同时还可以吸光，防止光线从四周漏出导致显示面板上出现亮线。
可选地，弹性吸光层44材料可为黑色橡胶。
需要说明的是，在本实施例中该弹性吸光层44选用的是黑色橡胶材料，在其它实施例中也可为单独的弹性层材料和吸光层材料的叠加，本公开对此不做限制。
在一实施例中，如图4B和图4C所示，该背光模组4还包括设置在挡壁402的顶部的弹性吸光结构45。
具体的，该弹性吸光结构45设置在挡壁402顶部，该弹性吸光结构45可以吸收从挡壁402顶部射出的光线，防止光从导光板40的顶部射出，从而防止出现亮线。同时弹性吸光结构45可以在显示面板和边框组装完成后，避免显示面板和边框直接接触划伤，并且，该弹性吸光结构45还可以在边框受到外力时起到一定的缓冲作用，避免出现L0漏光。
在一实施例中，弹性吸光结构45为黑色泡棉。
可选地，黑色泡棉为聚氨酯材质泡棉，压缩比可以为60％～70％，例如为70％。通过设置压缩比为70％的黑色泡棉，使边框受到外力时起到一定的缓冲作用，避免出现L0漏光。
具需要说明的是，在本实施例中该弹性吸光层45选用的是黑色泡棉材料，在其它实施例中也可为单独的弹性层材料和吸光层材料的叠加，本公开对此不做限制。
在一实施例中，还包括设置在导光板40的导光面40c和侧壁上的反射片46，导光板40的导光面40c为板体401的与出光面40b相对的侧面。通过在导光板40的导光面40c和侧壁上设置反射片46，反射片46可将导光板40向外射出的光反射回导光板40中，提高光线的利用率。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的背光模组的具体结构，可以参考前述导光板的实施例中的对应结构，在此不再赘述。
本公开实施例提供了一种液晶显示装置，如图5所示，可以包括：显示面板50和背光模组51。显示面板50设置在背光模组51的导光板511的凹槽内。
其中，显示模组51可为图3A-3C所示的背光模组或图4A-4C所示的背光模组。
本公开实施例提供的液晶显示装置中，该导光板的出光面设置呈环形结构的挡壁，该挡壁与板体形成用于容置显示面板和光学膜材的凹槽，从而显示面板和光学膜材可由导光板固定支撑，无需使用胶框安装显示面板，进而避免了胶框低温收缩挤压显示面板造成偏光片不良的问题。
具体的，显示面板50可通过背光模组51中的弹性吸光层512卡设于导光板511的凹槽中，也可与弹性吸光层512粘贴固定，本公开实施例对此不做限制。
在一实施例中，如图5所示，液晶显示装置还包括：
边框52，边框52安装在背板513上，且显示面板50位于边框52和背光模组51之间。
在一实施例中，边框52与显示面板50在垂直于显示面板50的方向上的间隙可以为0.2mm-0.3mm。该间隙大小可以解决当边框52与胶框间隙过小时，边框52会挤压显示面板50，加重L0的漏光，当边框52与胶框间隙过大时，边框52与显示面板50间会产生异物的问题。
在具体实施时，本公开实施例提供的液晶显示装置可以为手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的液晶显示装置的具体结构，可以参考前述背光模组的实施例中的对应结构，在此不再赘述。
以上所述仅为本公开的可选实施例，并不用以限制本公开，凡在本公开的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本公开的保护范围之内。

Claims (15)

  1. 一种导光板，包括：
    板体，所述板体的一表面为所述导光板的出光面；及
    挡壁，所述挡壁为沿所述板体的边缘设置的环形结构，且所述挡壁凸出于所述出光面，所述板体和所述挡壁共同形成一用于容置显示面板和光学膜材的凹槽。
  2. 根据权利要求1所述的导光板，其中，从所述出光面沿着所述挡壁的内壁延伸出一环形的台阶部，所述台阶部具有一顶面和一侧面，所述顶面与所述挡壁形成用于容置所述显示面板的第一凹槽，所述侧面与所述板体形成用于容置所述光学膜材的第二凹槽。
  3. 根据权利要求2所述的导光板，其中，所述第二凹槽的相对的两侧壁上开设有用于固定光学膜材的限位槽。
  4. 根据权利要求1至3任一项所述的导光板，其中，所述板体的侧壁上设有用于容置一发光单元的发光单元安装槽。
  5. 一种背光模组，其中，包括导光板、光学膜材、背板以及发光单元，所述导光板具有入光面和出光面，其中，
    所述导光板包括板体和挡壁，所述板体的一表面为所述导光板的出光面，所述挡壁为沿所述板体的边缘设置的环形结构，且所述挡壁突出于所述出光面；
    所述板体和所述挡壁形成用于容置一显示面板和一光学膜材的凹槽，所述光学膜材设于所述凹槽内且与所述出光面贴合；
    所述导光板和所述发光单元设置在所述背板上，所述发光单元设置在所述导光板的入光面处。
  6. 根据权利要求5所述的背光模组，其中，从所述出光面沿着所述挡壁的内壁延伸出一环形的台阶部，所述台阶部具有一顶面和一侧面，所述顶面与所述挡壁形成用于容置所述显示面板的第一凹槽，所述侧面与所述板体形成用于容置所述光学膜材的第二凹槽。
  7. 根据权利要求6所述的背光模组，其中，所述第二凹槽的相对的两侧壁上开设有用于固定光学膜材的限位槽，所述光学膜材的侧边设有与所述限位槽配合的凸耳结构。
  8. 根据权利要求6所述的背光模组，其中，所述第一凹槽的内壁上还设有弹性吸光层。
  9. 根据权利要求5至8任一项所述的背光模组，其中，所述板体的侧壁上设有用于容置所述发光单元的发光单元安装槽，所述发光单元设置在所述发光单元安装槽内。
  10. 根据权利要求9所述的背光模组，其中，还包括设置在所述挡壁的顶部的弹性吸 光结构。
  11. 根据权利要求10所述的背光模组，其中，所述弹性吸光结构为黑色泡棉。
  12. 根据权利要求9所述的背光模组，其中，还包括设置在所述导光板的导光面和侧壁上的反射片，所述导光板的导光面为所述板体的与所述出光面相对的侧面。
  13. 一种液晶显示装置，其中，包括：
    显示面板；和
    如权利要求5-12任一项所述的背光模组，所述显示面板设置在所述导光板的凹槽内。
  14. 根据权利要求13所述的液晶显示装置，其中，所述液晶显示装置还包括：
    边框，所述边框安装在所述背板上，且所述显示面板位于所述边框和所述背光模组之间。
  15. 根据权利要求14所述的液晶显示装置，其中，所述边框与所述显示面板在垂直于所述显示面板的方向上的间隙为0.2mm-0.3mm。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020087664A1 (zh) * 2018-10-30 2020-05-07 武汉华星光电技术有限公司 终端设备

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106772775A (zh) * 2017-02-08 2017-05-31 京东方科技集团股份有限公司 一种导光板、背光模组和液晶显示装置
CN107422534B (zh) * 2017-08-30 2020-04-24 惠科股份有限公司 一种液晶显示装置
CN109839774B (zh) * 2017-11-24 2022-01-11 群创光电股份有限公司 显示设备
CN112180492A (zh) * 2019-07-03 2021-01-05 元太科技工业股份有限公司 导光模块及具有导光模块的显示模块
WO2023066013A1 (zh) * 2021-10-19 2023-04-27 海信视像科技股份有限公司 一种显示装置
CN114299817B (zh) * 2021-12-29 2023-09-26 武汉华星光电半导体显示技术有限公司 显示模组及显示装置
CN115116334A (zh) * 2022-07-18 2022-09-27 友达光电（昆山）有限公司 背光模组及应用其的显示装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050254261A1 (en) * 2004-05-12 2005-11-17 Au Optronics Corp. Backlight module
CN101726788A (zh) * 2008-10-27 2010-06-09 奇美电子股份有限公司 导光板、背光模块、液晶显示器装置及电器设备
CN202204951U (zh) * 2011-09-09 2012-04-25 北京京东方光电科技有限公司 一种导光板、背光源及液晶显示装置
CN203082682U (zh) * 2012-12-10 2013-07-24 达运精密工业（苏州）有限公司 背光模组及使用其的液晶显示装置
CN204065622U (zh) * 2014-10-16 2014-12-31 信利半导体有限公司 背光源
CN106772775A (zh) * 2017-02-08 2017-05-31 京东方科技集团股份有限公司 一种导光板、背光模组和液晶显示装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4379390B2 (ja) * 2005-07-14 2009-12-09 三菱電機株式会社 プラスチックシート
JP2010002745A (ja) * 2008-06-20 2010-01-07 Hitachi Displays Ltd 液晶表示装置
US20120113674A1 (en) * 2010-11-09 2012-05-10 Shenzhen China Star Optoelectronics Technology Co., Ltd. Backlight module and display apparatus
CN102645766A (zh) * 2012-04-28 2012-08-22 深圳市华星光电技术有限公司 一种液晶显示装置用框架及液晶显示装置
JP2014170159A (ja) * 2013-03-05 2014-09-18 Japan Display Inc 液晶表示装置
CN204028512U (zh) * 2014-06-30 2014-12-17 北京京东方专用显示科技有限公司 显示装置
KR20160015476A (ko) * 2014-07-30 2016-02-15 삼성디스플레이 주식회사 표시 장치
CN204348262U (zh) * 2015-01-04 2015-05-20 京东方科技集团股份有限公司 一种显示装置及其框体组件
KR20170115223A (ko) * 2016-04-06 2017-10-17 삼성디스플레이 주식회사 표시 패널 및 이를 포함하는 표시 장치

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050254261A1 (en) * 2004-05-12 2005-11-17 Au Optronics Corp. Backlight module
CN101726788A (zh) * 2008-10-27 2010-06-09 奇美电子股份有限公司 导光板、背光模块、液晶显示器装置及电器设备
CN202204951U (zh) * 2011-09-09 2012-04-25 北京京东方光电科技有限公司 一种导光板、背光源及液晶显示装置
CN203082682U (zh) * 2012-12-10 2013-07-24 达运精密工业（苏州）有限公司 背光模组及使用其的液晶显示装置
CN204065622U (zh) * 2014-10-16 2014-12-31 信利半导体有限公司 背光源
CN106772775A (zh) * 2017-02-08 2017-05-31 京东方科技集团股份有限公司 一种导光板、背光模组和液晶显示装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020087664A1 (zh) * 2018-10-30 2020-05-07 武汉华星光电技术有限公司 终端设备

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