WO2014056247A1 - 背光模组 - Google Patents

背光模组 Download PDF

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Publication number
WO2014056247A1
WO2014056247A1 PCT/CN2012/083166 CN2012083166W WO2014056247A1 WO 2014056247 A1 WO2014056247 A1 WO 2014056247A1 CN 2012083166 W CN2012083166 W CN 2012083166W WO 2014056247 A1 WO2014056247 A1 WO 2014056247A1
Authority
WO
WIPO (PCT)
Prior art keywords
retaining wall
elastic retaining
plastic frame
guide plate
light guide
Prior art date
Application number
PCT/CN2012/083166
Other languages
English (en)
French (fr)
Inventor
萧宇均
张庞岭
巫越
李全
Original Assignee
深圳市华星光电技术有限公司
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 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US13/703,901 priority Critical patent/US8801258B2/en
Priority to DE112012006986.2T priority patent/DE112012006986B4/de
Publication of WO2014056247A1 publication Critical patent/WO2014056247A1/zh

Links

Classifications

    • 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
    • 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
    • G02B6/0093—Means for protecting the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • 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

Definitions

  • the present invention relates to the field of liquid crystal displays, and more particularly to a backlight module for preventing light leakage. Background technique
  • Liquid crystal display has many advantages such as thin body, power saving, and no radiation, and has been widely used.
  • Most of the liquid crystal display devices on the market are backlight type liquid crystal display devices, which include a liquid crystal panel and a backlight module.
  • the working principle of the liquid crystal panel is to place liquid crystal molecules in two parallel glass substrates. There are many vertical and horizontal small wires between the two glass substrates, and the liquid crystal molecules are controlled to change direction by energization or not, and the light of the backlight module is refracted. Come out to produce the picture. Since the liquid crystal panel itself does not emit light, the light source provided by the backlight module needs to be used to display the image normally. Therefore, the backlight module becomes one of the key components of the liquid crystal display device.
  • the backlight module is divided into a side-in backlight module and a direct-lit backlight module according to different incident positions of the light source.
  • a light source such as a CCFL (Cold Cathode Fluorescent Lamp) or an LED (Light Emitting Diode) is disposed behind the liquid crystal panel to directly form a surface light source for the liquid crystal panel.
  • the side-lit backlight module has a backlight LED strip (Light bar) disposed on the edge of the back panel behind the liquid crystal panel, and the light emitted by the LED strip is lighted from the light guide plate (LGP). The surface enters the light guide plate, is reflected and diffused, and is emitted from the light exit surface of the light guide plate, and is supplied to the liquid crystal panel through the optical film group to form a surface light source.
  • LGP light guide plate
  • the narrow-frame backlight module has also become a trend in the future.
  • the width of the optical film set 200 which is pressed under the plastic frame 300 is narrow, but in order to ensure that the optical film set 200 does not
  • the backlight module is slid out, and the general optical film set 200 directly extends to the edge of the light guide plate 400.
  • the light of the LED strip 100 will go out from the gap between the frame 300 and the light guide plate 400 and the frame 300 and the back plate 500, causing light leakage.
  • the white reflective sheet 600 is attached to the plastic frame 300 on the light-incident side, and is incident on the plastic frame 300 and the light guide plate 400 , and the plastic frame 300 and the back plate 500 .
  • the light between the gaps is reflected back, allowing the light to converge as much as possible into the light guide plate 400, improving the light efficiency.
  • the white reflective sheet 600 attached to the plastic frame 300 does not reflect all of the light to the light guide plate 400, and due to the reflection sheet 600 and the gap.
  • the light emitted by the LED lamp passes The optical path 1 and the optical path 2 are emitted from the upper surface of the light guide plate 400 and the upper surface of the LED lamp, causing light leakage. Summary of the invention
  • the object of the present invention is to provide a backlight module, which is in close contact with the upper surface of the light guide plate and the LED lamp with an elastic elastic retaining wall, thereby solving the problem of light leakage on the light entrance side of the backlight module, and improving the light of the backlight module. effectiveness.
  • the present invention provides a backlight module, including: a back plate, a reflective sheet disposed in the back plate, a light guide plate disposed on the reflective sheet, and an optical film set disposed on the light guide plate, disposed on the back a backlight disposed in the board and disposed opposite to the light guide plate, a plastic frame disposed on the back plate, and an elastic block disposed above the light incident end of the backlight and the light guide plate and fixed to the plastic frame by being fastened, attached or snapped
  • the elastic retaining wall includes a bottom surface and a side surface perpendicular to the bottom surface, the bottom surface and the side surface being in close contact with the upper surface of the light guide plate and the backlight.
  • the backlight comprises: a PCB board and a plurality of LED lamps mounted on the PCB board, wherein a bottom surface of the elastic retaining wall is in close contact with an upper surface of the LED lamp, and a side of the elastic retaining wall is in close contact with a side of the PCB board .
  • the elastic retaining wall is made of white rubber.
  • the end face of the elastic retaining wall has an "L" shape, and includes a first upper end portion, the plastic frame is provided with a first groove corresponding to the first upper end portion, and the first upper end portion is inserted into the first The groove further fixes the elastic retaining wall to the plastic frame.
  • the end surface of the elastic retaining wall is rectangular, and includes a second upper end portion.
  • the plastic frame is provided with a second groove corresponding to the second upper end portion, and the second upper end portion is inserted into the second groove. Further, the elastic retaining wall is fastened to the plastic frame.
  • the second upper end portion is provided with a plurality of first positioning posts
  • the rubber frame is provided with a plurality of first mounting holes corresponding to the first positioning posts, and the plurality of first positioning posts are engaged with the first mounting holes, and further Fixing the elastic retaining wall to the plastic frame.
  • the elastic retaining wall further includes a bent portion extending from a side surface of the second upper end portion, the bent portion is in close contact with a side surface of the PCB, and the elastic retaining wall is fixed and fixed by the double-sided adhesive tape On the plastic frame.
  • the plastic frame is provided with a third groove corresponding to the second upper end portion and the bent portion, and the elastic retaining wall is fixed in the third groove by double-sided adhesive tape.
  • the second upper end portion is provided with a plurality of second positioning holes
  • the second positioning column is provided with a plurality of second mounting holes
  • the plurality of second positioning posts are engaged with the second mounting holes, and further Fixing the elastic retaining wall to the plastic frame.
  • the end face of the elastic retaining wall has a convex shape, and includes: a base portion and a convex portion disposed on the base portion, wherein the plastic frame is provided with a fourth groove corresponding to the convex portion, and the convex portion is inserted into the convex portion The fourth groove further fixes the elastic retaining wall to the plastic frame, and the convex portion is disposed above the base or at an upper corner of the base near the end of the light guide plate.
  • the present invention further provides a backlight module, comprising: a back plate, a reflective sheet disposed in the back plate, a light guide plate disposed on the reflective sheet, and an optical film set disposed on the light guide plate, disposed in the back plate and opposite a backlight disposed on the light guide plate, a plastic frame disposed on the back plate, and a resilient retaining wall disposed above the light incident end of the backlight and the light guide plate and fixed to the plastic frame by being fastened, attached or snapped.
  • the elastic retaining wall includes a bottom surface and a side surface perpendicular to the bottom surface, the bottom surface and the side surface being in close contact with the upper surface of the light guide plate and the backlight;
  • the backlight includes: a PCB board and a plurality of LED lights mounted on the PCB board, wherein a bottom surface of the elastic retaining wall is in close contact with an upper surface of the LED lamp, and a side of the elastic retaining wall and a side of the PCB board Close contact;
  • the elastic retaining wall is made of white rubber
  • the end face of the elastic retaining wall is in the shape of an "L", and includes a first upper end portion.
  • the plastic frame is provided with a first groove corresponding to the first upper end portion, and the first upper end portion is inserted into the The first groove further fixes the elastic retaining wall to the plastic frame.
  • the backlight module of the present invention is made of white rubber and has an elastic elastic retaining wall, which is fixed to the plastic frame by plugging, attaching or snapping, and is connected with the light guide plate and the LED lamp.
  • the surface is in close contact, so that the light is reflected back into the light guide plate, which prevents the light from being emitted from the gap on the light incident side, solves the problem of light leakage on the light entrance side of the backlight module, and improves the light efficiency of the backlight module.
  • FIG. 1 is a schematic structural view of a conventional backlight module
  • FIG. 2 is a schematic structural view of a backlight module with a conventional reflection sheet
  • FIG. 3 is a schematic structural view of a first preferred embodiment of a backlight module of the present invention.
  • FIG. 4 is a schematic structural view of a second preferred embodiment of a backlight module of the present invention
  • 5 is a schematic structural view of a third preferred embodiment of a backlight module of the present invention
  • FIG. 6 is a perspective view showing the structure of the elastic retaining wall of FIG.
  • Figure ⁇ is a schematic structural view of a fourth preferred embodiment of the backlight module of the present invention.
  • FIG. 8 is a schematic structural view of a fifth preferred embodiment of a backlight module of the present invention.
  • Figure 9 is a perspective view showing the structure of the elastic retaining wall of Figure 8.
  • FIG. 10 is a schematic structural view of a sixth preferred embodiment of a backlight module of the present invention.
  • FIG. 11 is a schematic structural view of another implementation manner of a sixth preferred embodiment of a backlight module of the present invention. detailed description
  • the present invention provides a backlight module, including: a back sheet 2 , a reflective sheet 4 disposed in the back sheet 2 , a light guide plate 6 disposed on the reflective sheet 4 , and a light guide plate 6 disposed on the light guide plate 6 .
  • An optical film group 8 , a backlight 5 disposed in the back plate 2 and disposed opposite to the light guide plate 6 , a plastic frame 7 disposed on the back plate 2 , and the backlight 5 and the light guide plate 6 are disposed above the light incident end
  • the elastic retaining wall 9 is fastened, attached or snapped to the plastic frame 7.
  • the elastic retaining wall 9 includes a bottom surface 93 and a side surface 94 perpendicular to the bottom surface 93.
  • the bottom surface 93 and the side surface 94 and the light guide plate The upper surface of the 6 and the backlight 5 are in close contact, thereby preventing the light from being emitted and reflecting the light into the light guide plate, thereby solving the problem of light leakage on the light entrance side of the backlight module, and fully utilizing the light emitted by the backlight 5 to improve Light effect.
  • the elastic retaining wall 9 is preferably made of a white rubber and is elastic.
  • the backlight 5 includes: a PCB board 52 and a plurality of LED lamps 54 mounted on the PCB board 52.
  • the plurality of LED lamps 54 are electrically connected to the PCB board 52.
  • the bottom surface 93 of the elastic retaining wall 9 is in close contact with the upper surfaces of the plurality of LED lamps 54, and the side surface 94 is in close contact with the side surface of the PCB board 52, so that the elastic retaining wall 9 and the light guide plate 6 and the backlight 5 have no gap.
  • the end face of the elastic retaining wall 9 is in the shape of an "L", and includes a first upper end portion 92.
  • the plastic frame 7 is provided with a first recess corresponding to the first upper end portion 92.
  • the groove 72, the first upper end portion 92 is inserted into the first groove 72, and the elastic retaining wall 9 is plugged and fixed to the plastic frame 7.
  • the aluminum extrusion (not shown) disposed between the backlight 5 and the back plate 2 is designed in an integrated manner, so that the heat generated by the backlight 5 is quickly transmitted to the back plate 2.
  • the first upper end portion 92 of the "L" type elastic retaining wall 9 is inserted into the plastic frame 7 a groove 72, and then the plastic frame 7 with the elastic retaining wall 9 is fastened to the back plate 2, and after the fastening, the bottom surface 93 of the "L” type elastic retaining wall 9 and the upper surface of the light guide plate 6
  • the upper surface of the LED lamp 54 is in close contact with each other to prevent light leakage.
  • the side surface 94 of the "L" type elastic retaining wall 9 is in close contact with the surface of the PCB board 52, thereby fixing the elastic retaining wall 9 to prevent it. mobile.
  • the elastic retaining wall 9 has a rectangular end surface and includes a second upper end portion 92.
  • the plastic frame 7 corresponds to the second upper end.
  • the portion 92 is provided with a second recess 72.
  • the second upper end portion 92 is inserted into the second recess 72, and the elastic retaining wall 9 is plugged and fixed to the plastic frame 7.
  • the aluminum extrusion (not shown) disposed between the backlight 5 and the back plate 2 is designed in an integrated manner, so that the heat generated by the backlight 5 is quickly transmitted to the back plate 2.
  • the second upper end portion 92 of the rectangular elastic retaining wall 9 When installed, the second upper end portion 92 of the rectangular elastic retaining wall 9 is inserted into the second recess 72' of the plastic frame, and then the plastic frame 7' with the elastic retaining wall 9' is downwardly and back-mounted. After the fastening, the bottom surface 93' of the rectangular elastic retaining wall 9' is in close contact with the upper surface of the light guide plate 6 and the upper surface of the LED lamp 54 to prevent light leakage.
  • the rectangular elastic retaining wall The side surface 94 of 9, in close contact with the surface of the PCB board 52, fixes the elastic retaining wall 9 to prevent its movement.
  • the third preferred embodiment is improved on the basis of the second preferred embodiment.
  • the second upper end portion 92" is provided with a plurality of first positioning posts 95, and the plastic frame 7" Corresponding to the first positioning post 95, a plurality of first mounting holes 74 are provided, and the plurality of first positioning posts 95 are engaged with the first mounting holes 74, thereby fixing the elastic retaining wall 9" to the plastic frame.
  • the first positioning post 95 may be cylindrical or may be a square or the like.
  • the elastic retaining wall 9" is locked by the first positioning post 95, and the plastic frame 7" eliminates the setting of the second recess 72.
  • the first positioning post 95 of the elastic retaining wall is engaged with the first mounting hole 74, and then the plastic frame 7" with the elastic retaining wall 9" is fastened downwardly to the back plate 2, and after being fastened,
  • the bottom surface 93" of the elastic retaining wall 9" is in close contact with the upper surface of the light guide plate 6 and the upper surface of the LED lamp 54 to prevent light leakage.
  • the side surface 94" of the elastic retaining wall 9" and the PCB The surface of the plate 52 is in close contact to fix the elastic retaining wall 9" to prevent its movement.
  • the elastic retaining wall 9" further includes a side extending from the second upper end portion 92".
  • the bent portion 96 has a shape of a fold of the elastic retaining wall 9"'.
  • the bent portion 96 is in close contact with the upper side surface of the PCB board 52, and the elastic retaining wall 9" is caused by adding the bent portion 96, And the plastic frame 7, "the contact area is increased, and the elastic retaining wall 7" can be attached to the plastic frame 7" by double-sided tape.
  • the plastic frame 7, "corresponds to the second The upper end portion 92", and the bent portion 96 may also be provided with a third recess 72", the elastic retaining wall 9" is fixed to the third recess 72 by a double-sided adhesive tape"
  • the third recess 72 ′′ can also be omitted, and the elastic retaining wall 9 ′′ is directly attached to the plastic frame 7 ′′.
  • the backlight module the backlight 5 and the back plate 2 are disposed.
  • the aluminum extrusion (not shown) is designed in a split type to quickly transfer the heat from the backlight 5 to the backing plate 2.
  • the double-sided adhesive is attached to the second upper end portion 9" of the elastic retaining wall 9", and the upper side of the bent portion 96, and the elastic retaining wall 9" is attached to the plastic frame 7 by the double-sided tape.
  • the corresponding position or the third groove 72", and then the plastic frame 7" attached with the elastic retaining wall 9 is fastened to the back plate 2, and after the fastening, the elastic retaining wall 9"
  • the bottom surface 93" is in close contact with the upper surface of the light guide plate 6 and the upper surface of the LED lamp 54, and functions to prevent light leakage.
  • the side surface 94" of the elastic retaining wall 9", and the PCB board 52 The surface is in close contact, thereby fixing the elastic retaining wall 9" to prevent its movement.
  • the fifth preferred embodiment is improved on the basis of the fourth preferred embodiment.
  • a plurality of second positioning posts 14 are added to the top of the second upper end portion 12, and the plastic frame 3 corresponds to the
  • the second positioning post 14 is provided with a plurality of second mounting holes 32, and the plurality of second positioning posts 14 are engaged with the second mounting holes 32, thereby fixing the elastic retaining wall 1 to the plastic frame 3.
  • the elastic retaining wall 1 is locked by the second positioning post 14, and the plastic frame 3 eliminates the setting of the third recess 72".
  • the second positioning post 14 of the elastic retaining wall 1 is engaged with the second mounting hole 32, and then the plastic frame 3 with the elastic retaining wall 1 is fastened downwardly to the backing plate 2, and after being fastened,
  • the bottom surface 16 of the elastic retaining wall 1 is in close contact with the upper surface of the light guide plate 6 and the upper surface of the LED lamp 54 to prevent light leakage.
  • the side surface 18 of the elastic retaining wall 1 is close to the surface of the PCB board 52. Contact, thereby fixing the elastic retaining wall 1 to prevent its movement.
  • the elastic retaining wall 1 has a convex shape on the end surface, and includes: a base portion 13 and a convex portion 14' disposed on the base portion 13
  • the plastic frame 3 is provided with a fourth recess 34 corresponding to the convex portion 14.
  • the convex portion 14 is inserted into the fourth recess 34, and the elastic retaining wall 1 is plugged and fixed to the rubber. Box 3, on.
  • the convex portion 14 is disposed above the base portion 13.
  • the convex portion 14" may be disposed on the base portion 13 as shown in FIG.
  • the plastic frame On the upper corner of the end of the light guide plate 6, the plastic frame is provided with a fifth recess 34 with respect to the convex portion 14".
  • the aluminum extruded (not labeled) disposed between the backlight 5 and the back plate 2 is designed to be separated, so that the heat generated by the backlight 5 is quickly transmitted to the back plate 2.
  • the convex portion 14 of the convex-shaped elastic retaining wall, the convex portion 14" of the elastic retaining wall 1" is inserted into the fourth recess 34 of the plastic frame 3 (the plastic frame 3, The fifth groove 34,), then the plastic frame 3'(3") with the elastic retaining wall 1 (1") is fastened to the back plate 2, and after the fastening, the elastic retaining wall ⁇ (1
  • the bottom surface 16 of the "", "16") is in close contact with the upper surface of the light guide plate 6, and the upper surface of the LED lamp 54, to prevent light leakage, and the side surface 18 of the elastic barrier wall (1"), (184) is in close contact with the surface of the PCB board 52, thereby fixing the elastic retaining wall ⁇
  • the present invention provides a backlight module, which is made of white rubber and has an elastic elastic retaining wall, which is fixed to the plastic frame by plugging, attaching or snapping, and is connected with the light guide plate and the LED.
  • the upper surface of the lamp is in close contact, so that the light is reflected back into the light guide plate, which prevents the light from being emitted from the gap on the light incident side, solves the problem of light leakage on the light entrance side of the backlight module, and improves the light efficiency of the backlight module.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

一种背光模组包括：背板（2）、设于背板（2）内的反射片（4）、设于反射片（4）上的导光板（6）、设于导光板（6）上的光学膜片组（8）、设于背板（2）内且相对导光板（6）设置的背光源（5）、设于背板（2）上的胶框（7）、及设于背光源（5）及导光板（6）入光端上方并通过塞紧、贴附或卡合固定于胶框（7）上的弹性挡墙（9），所述弹性挡墙（9）包括一底面（93）及一垂直于底面（93）的侧面（94），所述底面（93）及侧面（94）与导光板（6）的上表面及背光源（5）紧密接触。采用白色橡胶制作而成并具有弹性的弹性挡墙（9），通过塞紧、贴附或卡合固定于胶框（7）上，并与导光板（6）、LED灯（54）的上表面紧密接触，从而把光反射回导光板（6）中，很好地防止了光线从入光侧的间隙射出，解决了背光模组入光侧漏光的问题，并提高背光模组的光效率。

Description

背光模组
技术领域
本发明涉及液晶显示器领域， 尤其涉及一种防漏光的背光模组。 背景技术
液晶显示装置（LCD, Liquid Crystal Display )具有机身薄、 省电、 无 辐射等众多优点， 得到了广泛的应用。 现有市场上的液晶显示装置大部分 为背光型液晶显示装置， 其包括液晶面板及背光模组 （ backlight module ) 。 液晶面板的工作原理是在两片平行的玻璃基板当中放置液晶分 子， 两片玻璃基板中间有许多垂直和水平的细小电线， 通过通电与否来控 制液晶分子改变方向， 将背光模组的光线折射出来产生画面。 由于液晶面 板本身不发光， 需要借由背光模组提供的光源来正常显示影像， 因此， 背 光模组成为液晶显示装置的关键组件之一。 背光模组依照光源入射位置的 不同分成侧入式背光模组与直下式背光模组两种。 直下式背光模组是将发 光光源例如 CCFL(Cold Cathode Fluorescent Lamp , 阴极萤光灯管）或 LED(Light Emitting Diode发光二极管)设置在液晶面板后方， 直接形成面 光源提供给液晶面板。 而侧入式背光模组是将背光源 LED 灯条（Light bar ) 设于液晶面板侧后方的背板边缘， LED 灯条发出的光线从导光板 ( LGP, Light Guide Plate )—侧的入光面进入导光板， 经反射和扩散后从 导光板出光面射出， 在经由光学膜片组， 以形成面光源提供给液晶面板。
请参阅图 1 , 随着 LED灯条 100作为背光源的发展， 窄边框背光模组 也成为未来发展的趋势。 为了追逐窄边框的设计， 同时保证光学膜片组 200 ( films ) 的信赖性， 在胶框 300 下压附的光学膜片组 200 的宽度很 窄， 但为了保证光学膜片组 200 不会从背光模组中滑出， 一般光学膜片组 200会直接伸到与导光板 400边缘。 这样 LED灯条 100的光线会从胶框 300与导光板 400及胶框 300与背板 500之间的缝隙出去， 造成漏光。
请参阅图 2, 针对上述的缺陷， 现有的做法是在入光侧的胶框 300上 贴附白色反射片 600, 将入射到胶框 300与导光板 400及胶框 300与背板 500之间的缝隙的光线反射回去， 使光尽可能多地汇聚进入导光板 400, 提高光效。 但实际上， 由于胶框 300与导光板 400 以及 LED灯之间存在 间隙， 贴附于胶框 300上的白色反射片 600并不能将光线全部反射至导光 板 400, 且由于反射片 600和间隙的同时作用， 使 LED灯发出的光线通过 光路①和光路②从导光板 400 上表面与 LED 灯的上表面射出， 造成漏 光。 发明内容
本发明的目的在于提供一种背光模组， 用具有弹性的弹性挡墙与导光 板、 LED灯的上表面紧密接触， 解决了背光模组入光侧漏光的问题， 并提 高背光模组的光效率。
为实现上述目的， 本发明提供一种背光模组， 包括： 背板、 设于背板 内的反射片、 设于反射片上的导光板、 设于导光板上的光学膜片组、 设于 背板内且相对导光板设置的背光源、 设于背板上的胶框、 及设于背光源及 导光板入光端上方并通过塞紧、 贴附或卡合固定于胶框上的弹性挡墙， 所 述弹性挡墙包括一底面及一垂直于底面的侧面， 所述底面及侧面与导光板 的上表面及背光源紧密接触。
所述背光源包括： PCB板及安装于所述 PCB板上的数个 LED灯， 所 述弹性挡墙的底面与 LED 灯上表面紧密接触， 所述弹性挡墙的侧面与 PCB板侧面紧密接触。
所述弹性挡墙由白色橡胶制作而成。
所述弹性挡墙端面呈 "L" 型， 其包括一第一上端部， 所述胶框对应 所述第一上端部设有一第一凹槽， 所述第一上端部塞入所述第一凹槽， 进 而把所述弹性挡墙塞紧固定于胶框上。
所述弹性挡墙端面呈矩形， 其包括一第二上端部， 所述胶框对应所述 第二上端部设有一第二凹槽， 所述第二上端部塞入所述第二凹槽， 进而把 所述弹性挡墙塞紧固定于胶框上。
所述第二上端部设有数个第一定位柱， 所述胶框对应所述第一定位柱 设有数个第一安装孔， 所述数个第一定位柱卡合于第一安装孔， 进而把弹 性挡墙固定于所述胶框上。
所述弹性挡墙还包括一从所述第二上端部侧面延伸出的弯折部， 所述 弯折部与 PCB板上侧面紧密接触， 所述弹性挡墙通过双面胶贴附固定于所 述胶框上。
所述胶框对应于第二上端部及弯折部设有一第三 槽， 所述弹性挡墙 通过双面胶贴附固定于所述第三凹槽内。
所述第二上端部设有数个第二定位柱， 所述胶框对应所述第二定位柱 设有数个第二安装孔， 所述数个第二定位柱卡合于第二安装孔， 进而把弹 性挡墙固定于所述胶框上。 所述弹性挡墙端面呈凸字形， 其包括： 一基部及设于所述基部上的凸 部， 所述胶框对应所述凸部设有一第四凹槽， 所述凸部塞入所述第四凹 槽， 进而把所述弹性挡墙塞紧固定于胶框上， 所述凸部设于所述基部的上 方或设于所述基部靠近导光板端的上边角上。
本发明还提供一种背光模组， 包括： 背板、 设于背板内的反射片、 设 于反射片上的导光板、 设于导光板上的光学膜片组、 设于背板内且相对导 光板设置的背光源、 设于背板上的胶框、 及设于背光源及导光板入光端上 方并通过塞紧、 贴附或卡合固定于胶框上的弹性挡墙， 所述弹性挡墙包括 一底面及一垂直于底面的侧面， 所述底面及侧面与导光板的上表面及背光 源紧密接触；
其中， 所述背光源包括： PCB板及安装于所述 PCB板上的数个 LED 灯， 所述弹性挡墙的底面与 LED 灯上表面紧密接触， 所述弹性挡墙的侧 面与 PCB板侧面紧密接触；
其中， 所述弹性挡墙由白色橡胶制作而成；
其中， 所述弹性挡墙端面呈 "L" 型， 其包括一第一上端部， 所述胶 框对应所述第一上端部设有一第一凹槽， 所述第一上端部塞入所述第一凹 槽， 进而把所述弹性挡墙塞紧固定于胶框上。
本发明的有益效果： 本发明背光模组釆用白色橡胶制作而成并具有弹 性的弹性挡墙， 通过塞紧、 贴附或卡合固定于胶框上， 并与导光板、 LED 灯的上表面紧密接触， 从而把光反射回导光板中， 很好地防止了光线从入 光侧的间隙射出， 解决了背光模组入光侧漏光的问题， 并提高背光模组的 光效率。
为了能更进一步了解本发明的特征以及技术内容， 请参阅以下有关本 发明的详细说明与附图， 然而附图仅提供参考与说明用， 并非用来对本发 明加以限制。 附图说明
下面结合附图， 通过对本发明的具体实施方式详细描述， 将使本发明 的技术方案及其它有益效果显而易见。
附图中，
图 1为现有背光模组结构示意图；
图 2为现有加反射片的背光模组结构示意图；
图 3为本发明背光模组第一较佳实施例的结构示意图；
图 4为本发明背光模组第二较佳实施例的结构示意图； 图 5为本发明背光模组第三较佳实施例的结构示意图； 图 6为图 5中弹性挡墙的结构立体示意图；
图 Ί为本发明背光模组第四较佳实施例的结构示意图；
图 8为本发明背光模组第五较佳实施例的结构示意图；
图 9为图 8中弹性挡墙的结构立体示意图；
图 10为本发明背光模组第六较佳实施例的结构示意图；
图 11 为本发明背光模组第六较佳实施例另一实现方式的结构示意 图。 具体实施方式
为更进一步阐述本发明所釆取的技术手段及其效果， 以下结合本发明 的优选实施例及其附图进行详细描述。
请参阅图 3 , 本发明提供一种背光模组， 其包括： 背板 2、 设于背板 2 内的反射片 4、 设于反射片 4上的导光板 6、 设于导光板 6上的光学膜片 组 8、 设于背板 2 内且相对导光板 6设置的背光源 5、 设于背板 2上的胶 框 7、 及设于背光源 5及导光板 6入光端上方并通过塞紧、 贴附或卡合固 定于胶框 7上的弹性挡墙 9, 所述弹性挡墙 9包括一底面 93及一垂直于底 面 93的侧面 94, 所述底面 93及侧面 94与导光板 6的上表面及背光源 5 紧密接触， 从而避免光线射出， 把光线反射进导光板中， 很好地解决了背 光模组入光侧漏光的问题， 并充分利用背光源 5发出的光， 提高光效。
所述弹性挡墙 9 优选由白色橡胶 （rubber ) 制作而成， 进而具有弹 性。
所述背光源 5 包括： PCB板 52及安装于所述 PCB板 52上的数个 LED灯 54, 所述数个 LED灯 54与所述 PCB板 52电性连接。 所述弹性挡 墙 9的底面 93与所述数个 LED灯 54上表面紧密接触， 其侧面 94与所述 PCB板 52侧面紧密接触， 使得弹性挡墙 9与导光板 6与背光源 5无间隙 配合。
在本第一较佳实施例中， 所述弹性挡墙 9 端面呈 "L" 型， 其包括一 第一上端部 92, 所述胶框 7对应所述第一上端部 92设有一第一凹槽 72 , 所述第一上端部 92塞入所述第一凹槽 72, 进而把所述弹性挡墙 9塞紧固 定于胶框 7 上。 在本背光模组中， 设置于背光源 5 与背板 2之间的铝挤 (未标示）釆用一体式设计， 从而快速将背光源 5发出的热快速传递到背 板 2。
安装时， 将 "L" 型弹性挡墙 9的第一上端部 92塞入所述胶框 7的第 一凹槽 72, 然后将带有弹性挡墙 9的胶框 7向下与背板 2扣合， 扣合后， 所述 "L" 型弹性挡墙 9的底面 93与导光板 6的上表面、 LED灯 54的上 表面紧密接触， 起到防止漏光的作用， 所述 "L" 型弹性挡墙 9的侧面 94 与所述 PCB板 52的表面紧密接触， 从而固定弹性挡墙 9, 防止其移动。
请参阅图 4, 作为可供选择的第二较佳实施例， 所述弹性挡墙 9，端面 呈矩形， 其包括一第二上端部 92，， 所述胶框 7，对应所述第二上端部 92，设 有一第二凹槽 72，， 所述第二上端部 92，塞入所述第二凹槽 72，， 进而把所 述弹性挡墙 9，塞紧固定于胶框 7，上。 在本背光模组中， 设置于背光源 5与 背板 2之间的铝挤 (未标示）釆用一体式设计， 从而快速将背光源 5发出 的热快速传递到背板 2。
安装时， 将矩形弹性挡墙 9，的第二上端部 92，塞入所述胶框的第二凹 槽 72' , 然后将带有弹性挡墙 9'的胶框 7'向下与背板 2扣合， 扣合后， 所 述矩形弹性挡墙 9'的底面 93'与导光板 6的上表面、 LED灯 54的上表面紧 密接触， 起到防止漏光的作用， 所述矩形弹性挡墙 9，的侧面 94，与所述 PCB板 52的表面紧密接触， 固定弹性挡墙 9，， 防止其移动。
请参阅图 5及 6, 本第三较佳实施例是在第二较佳实施例的基础上改 进， 所述第二上端部 92"设有数个第一定位柱 95 , 所述胶框 7"对应所述 第一定位柱 95设有数个第一安装孔 74, 所述数个第一定位柱 95卡合于第 一安装孔 74, 进而把弹性挡墙 9"固定于所述胶框上 7"。 其中， 所述第一 定位柱 95 可以为圓柱形， 也可以为方形等形状柱体。 在本较佳实施例 中， 通过第一定位柱 95卡合固定弹性挡墙 9" , 则所述胶框 7"省掉第二凹 槽 72，的设置。
安装时， 将弹性挡墙的第一定位柱 95卡合于第一安装孔 74上， 然后 将带有弹性挡墙 9"的胶框 7"向下与背板 2扣合， 扣合后， 所述弹性挡墙 9"的底面 93"与导光板 6的上表面、 LED灯 54的上表面紧密接触， 起到 防止漏光的作用， 所述弹性挡墙 9"的侧面 94"与所述 PCB板 52的表面紧 密接触， 从而固定弹性挡墙 9" , 防止其移动。
请参阅图 7 , 本第四较佳实施例亦是在第二较佳实施例的基础上改 进， 所述弹性挡墙 9"，还包括一从所述第二上端部 92"，侧面延伸出的弯折 部 96, 所述弹性挡墙 9"'的形状为折形。 所述弯折部 96与 PCB板 52上侧 面紧密接触， 通过增设弯折部 96, 从而使得弹性挡墙 9"，与胶框 7， "的接 触面积增大， 进而所述弹性挡墙 7"，可以通过双面胶贴附固定于所述胶框 7"，上。 所述胶框 7， "对应于第二上端部 92"，及弯折部 96也可以设有一第 三凹槽 72" , 所述弹性挡墙 9"，通过双面胶贴附固定于所述第三凹槽 72" 内， 所述第三凹槽 72"也可以省略， 所述弹性挡墙 9"，直接贴附于胶框 7"， 上。 在本背光模组中， 设置于背光源 5与背板 2之间的铝挤（未标示）釆 用分体式设计， 从而快速将背光源 5发出的热快速传递到背板 2。
安装时， 在弹性挡墙 9"，的第二上端部 9"，及弯折部 96的上侧面贴附 双面胶， 通过双面胶把弹性挡墙 9"，贴附于胶框 7， "的对应位置或第三凹槽 72"上， 然后将贴附有弹性挡墙 9"，的胶框 7"，向下与背板 2 扣合， 扣合 后， 所述弹性挡墙 9"，的底面 93"，与导光板 6的上表面、 LED灯 54的上表 面紧密接触， 起到防止漏光的作用， 所述弹性挡墙 9"，的侧面 94"，与所述 PCB板 52的表面紧密接触， 从而固定弹性挡墙 9"，， 防止其移动。
请参阅图 8 及 9 , 本第五较佳实施例是在第四较佳实施例基础上改 进， 所述第二上端部 12顶部增设有数个第二定位柱 14, 所述胶框 3对应 所述第二定位柱 14设有数个第二安装孔 32, 所述数个第二定位柱 14卡合 于第二安装孔 32, 进而把把弹性挡墙 1 固定于所述胶框 3上。 在本较佳实 施例中， 通过第二定位柱 14卡合固定弹性挡墙 1 , 则所述胶框 3省掉第三 凹槽 72"的设置。
安装时， 将弹性挡墙 1的第二定位柱 14卡合于第二安装孔 32上， 然 后将带有弹性挡墙 1的胶框 3向下与背板 2扣合， 扣合后， 所述弹性挡墙 1的底面 16与导光板 6的上表面、 LED灯 54的上表面紧密接触， 起到防 止漏光的作用， 所述弹性挡墙 1的侧面 18与所述 PCB板 52的表面紧密接 触， 从而固定弹性挡墙 1 , 防止其移动。
请参阅图 10, 作为可供选择的第六较佳实施例， 所述弹性挡墙 1，端面 呈凸字形， 其包括： 一基部 13及设于所述基部 13上的凸部 14' , 所述胶 框 3，对应所述凸部 14，设有一第四凹槽 34, 所述凸部 14，塞入所述第四凹 槽 34 , 进而把所述弹性挡墙 1，塞紧固定于胶框 3，上。 在本较佳实施例 中， 所述凸部 14，设于所述基部 13 的上方， 然不限于此， 如图 11 所示， 所述凸部 14"也可以设于所述基部 13，靠近导光板 6 端的上边角上， 所述 胶框相对所述凸部 14"设有第五凹槽 34，。 在本背光模组中， 设置于背光 源 5与背板 2之间的铝挤 (未标示）釆用分体式设计， 从而快速将背光源 5发出的热快速传递到背板 2。
安装时， 将凸字形弹性挡墙 Γ的凸部 14， （弹性挡墙 1 "的凸部 14" ) 塞入所述胶框 3，的第四凹槽 34 (所述胶框 3，，的第五凹槽 34，） ， 然后将带 有弹性挡墙 Γ ( 1 " ) 的胶框 3' ( 3" ) 向下与背板 2扣合， 扣合后， 所述弹 性挡墙 Γ ( 1 " ) 的底面 16， ( 16" )与导光板 6的上表面、 LED灯 54的上 表面紧密接触， 起到防止漏光的作用， 所述弹性挡墙 Γ ( 1 " ) 的侧面 18， ( 18" ) 与所述 PCB 板 52 的表面紧密接触， 从而固定弹性挡墙 Γ
( 1" ) , 防止其移动。
综上所述， 本发明提供一种背光模组， 釆用白色橡胶制作而成并具有 弹性的弹性挡墙， 通过塞紧、 贴附或卡合固定于胶框上， 并与导光板、 LED灯的上表面紧密接触， 从而把光反射回导光板中， 艮好地防止了光线 从入光侧的间隙射出， 解决了背光模组入光侧漏光的问题， 并提高背光模 组的光效率。
以上所述， 对于本领域的普通技术人员来说， 可以根据本发明的技术 方案和技术构思作出其他各种相应的改变和变形， 而所有这些改变和变形 都应属于本发明权利要求的保护范围。

Claims

权 利 要 求
1、 一种背光模组， 包括： 背板、 设于背板内的反射片、 设于反射片 上的导光板、 设于导光板上的光学膜片组、 设于背板内且相对导光板设置 的背光源、 设于背板上的胶框、 及设于背光源及导光板入光端上方并通过 塞紧、 贴附或卡合固定于胶框上的弹性挡墙， 所述弹性挡墙包括一底面及 一垂直于底面的侧面， 所述底面及侧面与导光板的上表面及背光源紧密接 触。
2、 如权利要求 1 所述的背光模组， 其中， 所述背光源包括： PCB板 及安装于所述 PCB板上的数个 LED灯， 所述弹性挡墙的底面与 LED灯上 表面紧密接触， 所述弹性挡墙的侧面与 PCB板侧面紧密接触。
3、 如权利要求 1 所述的背光模组， 其中， 所述弹性挡墙由白色橡胶 制作而成。
4、 如权利要求 1 所述的背光模组， 其中， 所述弹性挡墙端面呈 "L" 型， 其包括一第一上端部， 所述胶框对应所述第一上端部设有一第一凹 槽， 所述第一上端部塞入所述第一凹槽， 进而把所述弹性挡墙塞紧固定于 胶框上。
5、 如权利要求 1 所述的背光模组， 其中， 所述弹性挡墙端面呈矩 形， 其包括一第二上端部， 所述胶框对应所述第二上端部设有一第二凹 槽， 所述第二上端部塞入所述第二凹槽， 进而把所述弹性挡墙塞紧固定于 胶框上。
6、 如权利要求 5 所述的背光模组， 其中， 所述第二上端部设有数个 第一定位柱， 所述胶框对应所述第一定位柱设有数个第一安装孔， 所述数 个第一定位柱卡合于第一安装孔， 进而把弹性挡墙固定于所述胶框上。
7、 如权利要求 5 所述的背光模组， 其中， 所述弹性挡墙还包括一从 所述第二上端部侧面延伸出的弯折部， 所述弯折部与 PCB板上侧面紧密接 触， 所述弹性挡墙通过双面胶贴附固定于所述胶框上。
8、 如权利要求 7 所述的背光模组， 其中， 所述胶框对应于第二上端 部及弯折部设有一第三凹槽， 所述弹性挡墙通过双面胶贴附固定于所述第 三凹槽内。
9、 如权利要求 7 所述的背光模组， 其中， 所述第二上端部设有数个 第二定位柱， 所述胶框对应所述第二定位柱设有数个第二安装孔， 所述数 个第二定位柱卡合于第二安装孔， 进而把弹性挡墙固定于所述胶框上。
10、 如权利要求 1 所述的背光模组， 其中， 所述弹性挡墙端面呈凸字 形， 其包括： 一基部及设于所述基部上的凸部， 所述胶框对应所述凸部设 有一第四凹槽， 所述凸部塞入所述第四凹槽， 进而把所述弹性挡墙塞紧固 定于胶框上， 所述凸部设于所述基部的上方或设于所述基部靠近导光板端 的上边角上。
11、 一种背光模组， 包括： 背板、 设于背板内的反射片、 设于反射片 上的导光板、 设于导光板上的光学膜片组、 设于背板内且相对导光板设置 的背光源、 设于背板上的胶框、 及设于背光源及导光板入光端上方并通过 塞紧、 贴附或卡合固定于胶框上的弹性挡墙， 所述弹性挡墙包括一底面及 一垂直于底面的侧面， 所述底面及侧面与导光板的上表面及背光源紧密接 触；
其中， 所述背光源包括： PCB板及安装于所述 PCB板上的数个 LED 灯， 所述弹性挡墙的底面与 LED 灯上表面紧密接触， 所述弹性挡墙的侧 面与 PCB板侧面紧密接触；
其中， 所述弹性挡墙由白色橡胶制作而成；
其中， 所述弹性挡墙端面呈 "L" 型， 其包括一第一上端部， 所述胶 框对应所述第一上端部设有一第一凹槽， 所述第一上端部塞入所述第一凹 槽， 进而把所述弹性挡墙塞紧固定于胶框上。
PCT/CN2012/083166 2012-10-09 2012-10-19 背光模组 WO2014056247A1 (zh)

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