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WO2014008686A1 - 背光模组 - Google Patents

背光模组 Download PDF

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Publication number
WO2014008686A1
WO2014008686A1 PCT/CN2012/079226 CN2012079226W WO2014008686A1 WO 2014008686 A1 WO2014008686 A1 WO 2014008686A1 CN 2012079226 W CN2012079226 W CN 2012079226W WO 2014008686 A1 WO2014008686 A1 WO 2014008686A1
Authority
WO
WIPO (PCT)
Prior art keywords
hole
optical film
light guide
backlight module
guide plate
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2012/079226
Other languages
English (en)
French (fr)
Inventor
唐国富
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Technology Co Ltd
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 Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US13/807,074 priority Critical patent/US8960981B2/en
Publication of WO2014008686A1 publication Critical patent/WO2014008686A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • 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
    • G02B6/0066—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 characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • 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
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • 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 invention relates to the field of liquid crystal displays, and more particularly to a method for fixing an optical film in a backlight module. 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, and control the liquid crystal molecules to change direction by energizing the glass substrate, and refracting the light of the backlight module to produce a picture. Since the liquid crystal panel itself does not emit light, the light source provided by the backlight module is required 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, and a surface light source is directly formed and supplied to 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 incident on 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 to form a surface light source for being supplied to the liquid crystal panel.
  • LGP light guide plate
  • the optical film is generally made of PET (polyparaphenylene phthalate plastic), and the thickness is thin, generally between 0.1 and 0.6 mm, which is prone to warpage.
  • the optical diaphragm of the small-sized backlight module generally adopts an ear-receiving type on the left and right sides. For the large-size backlight module, as shown in FIG.
  • the optical film 100 is generally suspended, and the hanging suspension column 200 is generally circular, and is uniformly distributed, because the suspension column 200 is circular, and
  • the optical film 100 is in point contact, and the optical film 100 between the two suspension columns has a gravity, and the gravity forms a moment with the suspension column 200 as a fulcrum, so that the optical film 100 will move toward the middle, as shown in FIG. 2A and FIG. 2B.
  • the movable distance is a reserved gap between the optical film 100 and the suspension post 200.
  • the suspension column 300 Changed to a flat shape, or shorten the spacing between the two suspension columns, which can improve the optical film to some extent.
  • the present invention provides a backlight module, including: a back plate, a backlight disposed in the back plate, a light guide plate corresponding to the backlight disposed in the back plate, and a reflective sheet disposed on the bottom surface of the light guide plate.
  • An optical film on a top surface of the light guide plate and a plurality of elastic members fixed on the back plate wherein the upper end of the optical film is provided with a plurality of hanging portions, and the first side walls of the left and right sides of the optical film each have a plurality of ears a first through hole is disposed on the hanging portion, a second through hole is disposed on the ear, the back plate is provided with a plurality of hanging columns corresponding to the first through hole, and the first through hole is mounted on the hanging column
  • the elastic member locks the second through hole and is mounted on the back plate to fix the optical film to the light guide plate.
  • An upper end of each of the left and right first side walls of the optical film grows an ear.
  • the elastic member is U-shaped, and the second sidewall of the open end is provided with a fixing hole, and the back plate is provided with a mounting post corresponding to the fixing hole, and the elastic member passes through the second through hole and passes through the fixing hole.
  • the mounting is fixed to the mounting post to secure the optical film to the light guide plate.
  • a latching hook is disposed on an inner side of the second side wall of the elastic member, and a latching hole is disposed on the second side wall of the second side wall.
  • the latching hook is fastened to the latching hole. Therefore, the optical film is fixed on the elastic member, the card position is in a shape of a figure, the card position hook includes a connecting rod and a first hook portion, and the card hole is set to a square shape with respect to the card position hook.
  • the second side walls of the elastic member are threaded away from the fixing hole end.
  • the elastic member is made of plastic.
  • the elastic member is made of rubber or silica gel.
  • the elastic member includes a bottom plate and two third side walls perpendicularly connected to the bottom plate.
  • the two third side walls are perpendicular to each other, and an opening is provided at the boundary between the two, and the two third side walls are arranged in a shape of a figure.
  • the upper end is provided with a second hook portion, and the bottom plate is provided with a circular third through hole.
  • the back plate is provided with a mounting hole opposite to the third through hole, and the elastic member is fixedly mounted on the mounting hole by a screw, and the second hook portion is clamped to the second through hole of the ear, thereby fixing the optical film On the light guide plate.
  • the upper and lower ends of the optical film are provided with a plurality of hanging portions and two left and right first side walls
  • Each of the ends has an ear, a first through hole is disposed on the hanging portion, a second through hole is disposed on the ear, and the back plate is provided with a plurality of hanging posts corresponding to the first through hole,
  • a through hole is mounted on the suspension post, and the elastic member locks the second through hole and is mounted on the back plate to fix the optical film to the light guide plate.
  • the present invention further provides a backlight module, including: a backplane, a backlight disposed in the backplane, a light guide plate corresponding to the backlight disposed in the backplane, a reflective sheet disposed on the bottom surface of the light guide plate, and a top disposed on the light guide panel
  • a backlight module including: a backplane, a backlight disposed in the backplane, a light guide plate corresponding to the backlight disposed in the backplane, a reflective sheet disposed on the bottom surface of the light guide plate, and a top disposed on the light guide panel
  • the optical film of the surface and the plurality of elastic members fixed on the back plate wherein the upper end of the optical film is provided with a plurality of hanging portions, and the first side walls of the left and right sides of the optical film each have a plurality of ears, the suspension a first through hole is disposed on the portion, and the second through hole is disposed on the ear, the back plate is provided with a plurality of suspension posts
  • the backlight module of the present invention prevents the optical film by growing the ear on the side wall of the optical film and locking the ear to the back plate by the elastic member and tightening it by the spring principle. Since the action of the gravity moment moves in the middle, the phenomenon of warpage of the optical film is improved, and the picture quality is improved.
  • Figure 1 is a schematic view showing the installation of a conventional optical film
  • FIGS. 2A and 2B are schematic views showing the positions of the left and right suspension columns after the optical film is moved in the middle;
  • FIG. 3 is a schematic view showing warpage of a conventional optical film
  • FIG. 4 is a schematic view showing a conventional optical diaphragm suspension column designed to be planar
  • FIG. 5 is a schematic structural view of a backlight module of the present invention.
  • FIG. 6 is a schematic view showing the installation of the first embodiment of the optical film in the backlight module of the present invention
  • Figure 7 is a cross-sectional view taken along line AA of Figure 6;
  • Figure 8 is a perspective view of the elastic member of Figure 6;
  • FIG. 9 is a cross-sectional view showing a second embodiment of an optical film in a backlight module of the present invention.
  • Figure 10 is a perspective view of the elastic member of Figure 9;
  • FIG. 11 is a cross-sectional view showing a third embodiment of an optical film in a backlight module of the present invention.
  • Figure 12 is a perspective view of the elastic member of Figure 11;
  • FIG. 13 is a cross-sectional view showing a fourth embodiment of an optical film in a backlight module of the present invention.
  • Figure 14 is a perspective view of the elastic member of Figure 13;
  • FIG. 15 is a schematic view showing the installation of the fifth embodiment of the optical film in the backlight module of the present invention. detailed description
  • the present invention provides a backlight module, including: a backplane 2, a backlight 4 disposed in the backplane 2, and a light guide panel 9 disposed in the backplane 2 corresponding to the backlight 4; a reflection sheet 6 on the bottom surface of the light guide plate 9, an optical film 8 disposed on the top surface of the light guide plate 9, and a plurality of elastic members 7 fixed to the back plate 2.
  • the upper end of the optical film 8 is provided with a plurality of suspension portions 86 and left and right.
  • a plurality of ears 82 are formed on each of the first side walls, a first through hole 88 is defined in the hanging portion, and a second through hole 84 is disposed on the ear 82, and the back plate 2 corresponds to the first pass.
  • the hole 88 is provided with a plurality of suspension posts 24, the first through holes 88 are mounted on the suspension post 24, and the elastic member 7 locks the second through holes 84 and is mounted on the backboard 2, thereby fixing the optical film 8 On the top surface of the light guide plate 9.
  • an ear 82 is formed on each of the left and right first side walls of the optical film 8.
  • the elastic member 7 is U-shaped, and the second side wall of the open end is provided with a fixing hole 72.
  • the back plate 2 is provided with a mounting post 22 corresponding to the fixing hole 72, and the elastic member 7 passes through the second pass.
  • the hole 84 is mounted and fixed to the mounting post 22 through the fixing hole 72, thereby fixing the optical film 8 to the light guide plate 9.
  • the fixing hole 72 is elliptical, but not limited to an elliptical shape.
  • the mounting post 22 may be a screw or a cylinder formed integrally with the back plate.
  • the elastic member 7 is made of plastic. In the embodiment, the elastic member 7 is made of rubber or silica gel.
  • the other second side wall of the elastic member 7 is passed through the second through hole 84 of the optical film 8, and the fixing hole 72 on the other second side wall is slightly pressed onto the mounting post 22.
  • the elastic member 7 has a pre-tightening force, so that the optical film 8 is pulled, and the elastic film 7 is pulled on both sides of the optical film 8, so that the optical film 8 can be prevented from being in the middle due to the gravity moment. Move The movement of the optical film 8 is improved, and the picture quality is improved.
  • the mounting post 22 is designed as an elliptical cylinder corresponding to the shape of the fixing hole 72.
  • this embodiment adds a card hook structure to the cornerstone of the first embodiment.
  • the elastic member 7' is U-shaped, and a second side wall is provided with a card hook 74 on the inner side surface thereof, and the other second side wall is provided with a corresponding hook position 74.
  • the hole 75 includes a connecting rod 742 and a first hook portion 744.
  • the latching hole 75 is disposed in a square shape with respect to the latching hook 74. When installed, the first hook portion 744 is clamped to the latching hole 75 to fix the optical film 8 to the elastic member 7'.
  • the elastic member 7" is U-shaped in shape, and the two second side walls are threaded away from the fixing hole 72'. .
  • the elastic member 7"' includes a bottom plate 77 and two third side walls 76 perpendicularly connected to the bottom plate 77, the two third side walls. 76 are perpendicular to each other, and an opening 79 is formed at the junction of the two, so that the two third side walls 76 can be bent forward and backward or left and right.
  • the two third side walls 76 are arranged in a shape of a figure, and the upper end is provided with a second hook portion 762.
  • the shape of the second hook portion 762 is different from that of the second through hole 84 of the optical film 8.
  • the bottom plate 77 is provided with a circular through hole 78.
  • the back plate 2 ′ is provided with a mounting hole (not labeled) relative to the third through hole 78 , and the elastic member 7′′′ is fixedly mounted on the mounting hole by the screw 24 , and the second hook portion 762 is clamped to the ear 82 .
  • the second through hole 84 is formed to fix the optical film 8 to the light guide plate 9.
  • the elastic member 7 is first "locked and fixed” to the back plate 2 by the screw 24 through the third through hole 78, and then the second through hole 84 of the optical film 8 is aligned with the second second hook portion. 762, the optical film 8 is lightly pressed, and the second through hole 84 is fastened and fixed to the second hook portion 762, and the optical film 8 is tensioned to the left and right by the spring principle, thereby preventing the optical film 8 from being affected by the gravity moment.
  • the intermediate movement improves the warpage of the optical film 8 and improves the picture quality.
  • the upper and lower ends of the optical film 8 ′ are respectively provided with a plurality of hanging portions 86 ′ and the left and right first side walls are long and long at the lower end.
  • An ear 82' is disposed, the hanging portion 86' is provided with a first through hole 88', and the ear 82' is provided with a second through hole 84'.
  • the back plate is opposite to the first through hole 88'.
  • There are a plurality of suspension posts 24' the suspension portion 86' is suspended from the suspension post 24', and the elastic member 7 locks the second through hole 84' and is mounted on the back plate to fix the optical film 7 to On the light guide plate 9.
  • the elastic member 7 may be any one of the first embodiment.
  • the present invention provides a backlight module that is formed by growing an ear on a side wall of an optical film and locking the ear to the back plate by an elastic member and tightening it by a spring principle.
  • the optical diaphragm moves in the middle due to the action of gravity moment, improving the optical diaphragm curl
  • the phenomenon of music improve the picture quality.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Description

背光模组 技术领域
本发明涉及液晶显示器领域， 尤其涉及一种背光模组中光学膜片的固 定方式。 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， 通过给玻璃基板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 )一侧的入光面进 入导光板， 经反射和扩散后从导光板出光面射出， 形成面光源提供给液晶 面板。
通常背光源需要光学膜片进行扩散及聚光以获得合适的光型。 光学膜 片一般为 PET 材质 （聚对苯二曱酸类塑料） ， 且厚度较薄， 一般在 0.1〜0.6mm之间， 容易发生翘曲。 小尺寸背光模组的光学膜片一般采用左 右侧的耳朵倚靠式。 对于大尺寸背光模组， 如图 1所示， 光学膜片 100— 般采用悬挂式， 悬挂式的悬挂柱 200—般为圓形， 采用均匀分布的方式， 由于悬挂柱 200为圓形， 与光学膜片 100为点接触， 两悬挂柱之间的光学 膜片 100存在一重力， 该重力以悬挂柱 200为支点形成力矩， 从而光学膜 片 100将会向中间移动， 如图 2A与图 2B所示， 可移动距离为光学膜片 100与悬挂柱 200的预留间隙。 光学膜片 100向中间移动后， 由于光学膜 片 100与液晶面板存在一间隙， 此时无法限制光学膜片 100的翘曲， 如图 3 所示， 画面表现为亮暗不均。 为了避免上述情况的发生， 把悬挂柱 300 改为平面状， 或缩短两悬挂柱的间距， 可在一定程度上改善了光学膜片
100 翘曲情况， 但由于存在结构设计空间不足， 不可无限缩小两柱子间 距， 仍然存在重力力矩作用， 如图 4 所示， 而且光学膜片为 PET 塑胶材 质， 不可避免会有热膨胀， 因此这就使得光学膜片翘曲无法避免。 发明内容
本发明的目的在于提供一种背光模组， 可以 4艮好地防止光学膜片由于 重力力矩作用向中间移动， 从而改善了光学膜片翘曲的现象， 提高画面质 量。
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 内的背光源、 对应背光源设于背板内的导光板、 设于导光板底面的反射 片、 设于导光板顶面的光学膜片及固定于背板上的数个弹性部件， 所述光 学膜片上端设有数个悬挂部， 所述光学膜片左右两第一侧壁各长出数个耳 朵， 所述悬挂部上设有第一通孔， 所述耳朵上设有第二通孔， 所述背板对 应该第一通孔设有数个悬挂柱， 所述第一通孔安装于悬挂柱上， 所述弹性 部件锁紧第二通孔并安装于背板上， 从而把光学膜片固定于导光板上。
所述光学膜片左右两第一侧壁上端各长出一耳朵。
所述弹性部件为 U形， 其开口端两第二侧壁上设有固定孔， 所述背板 对应固定孔位置设有安装支柱， 所述弹性部件穿过第二通孔， 并通过固定 孔安装固定于安装支柱上， 从而把光学膜片固定于导光板上。
所述弹性部件一第二侧壁内侧面上设有卡位勾， 另一第二侧壁上相对 卡位勾设有一卡位孔， 安装时， 所述卡位勾卡紧于卡位孔上， 从而把光学 膜片固定于弹性部件上， 所述卡位勾呈 1 字形， 所述卡位勾包括连接杆及 第一勾部， 所述卡位孔相对卡位勾设置为方形。
所述弹性部件两第二侧壁远离固定孔端呈螺纹状。
所述弹性部件采用塑胶制作而成。
所述弹性部件采用橡胶或硅胶制作而成。
所述弹性部件包括一底板及与该底板垂直连接的两第三侧壁， 所述两 第三侧壁互相垂直， 且两者交界处设有一开口， 所述两第三侧壁呈 1 字形 设置， 其上端设有第二勾部， 所述底板上设有圓形第三通孔。
所述背板相对第三通孔设有安装孔， 通过螺钉将该弹性部件安装固定 于安装孔上， 所述第二勾部卡紧于耳朵的第二通孔上， 从而将光学膜片固 定于导光板上。
所述光学膜片上、 下端均设有数个悬挂部及左、 右两第一侧壁上、 下 端均各长出一耳朵， 所述悬挂部上设有第一通孔， 所述耳朵上设有第二通 孔， 所述背板对应该第一通孔设有数个悬挂柱， 所述第一通孔安装于悬挂 柱上， 所述弹性部件锁紧第二通孔并安装于背板上， 从而把光学膜片固定 于导光板上。
本发明还提供一种背光模组， 包括： 背板、 设于背板内的背光源、 对 应背光源设于背板内的导光板、 设于导光板底面的反射片、 设于导光板顶 面的光学膜片及固定于背板上的数个弹性部件， 所述光学膜片上端设有数 个悬挂部， 所述光学膜片左右两第一侧壁各长出数个耳朵， 所述悬挂部上 设有第一通孔， 所述耳朵上设有第二通孔， 所述背板对应该第一通孔设有 数个悬挂柱， 所述第一通孔安装于悬挂柱上， 所述弹性部件锁紧第二通孔 并安装于背板上， 从而把光学膜片固定于导光板上； 其中所述光学膜片左 右两第一侧壁上端各长出一耳朵； 其中所述弹性部件为 U形， 其开口端两 第二侧壁上设有固定孔， 所述背板对应固定孔位置设有安装支柱， 所述弹 性部件穿过第二通孔， 并通过固定孔安装固定于安装支柱上， 从而把光学 膜片固定于导光板上； 其中所述弹性部件采用塑胶制作而成。
本发明的有益效果： 本发明背光模组通过在光学膜片的侧壁上长出耳 朵， 并通过弹性部件将耳朵锁紧固定于背板上并利用弹簧原理左右拉紧， 从而防止光学膜片由于重力力矩作用向中间移动， 改善了光学膜片翘曲的 现象， 提高画面质量。
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为现有光学膜片安装示意图；
图 2A与图 2B分别为现有光学膜片向中间移动后左侧与右侧悬挂柱的 位置示意图；
图 3为现有光学膜片翘曲示意图；
图 4为现有光学膜片悬挂柱设计成平面状安装示意图；
图 5为本发明背光模组的结构示意图；
图 6为本发明背光模组中光学膜片第一实施例安装示意图； 图 7为图 6中沿 AA线的截面图；
图 8为图 6中弹性部件的立体示意图；
图 9为本发明背光模组中光学膜片第二实施例的截面图；
图 10为图 9中弹性部件的立体示意图；
图 11为本发明背光模组中光学膜片第三实施例的截面图；
图 12为图 11中弹性部件的立体示意图；
图 13为本发明背光模组中光学膜片第四实施例的截面图；
图 14为图 13中弹性部件的立体示意图；
图 15为本发明背光模组中光学膜片第五实施例安装示意图。 具体实施方式
为更进一步阐述本发明所采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 5 至 8, 本发明提供一种背光模组， 包括： 背板 2、 设于背 板 2内的背光源 4、 对应背光源 4设于背板 2内的导光板 9、 设于导光板 9 底面的反射片 6、 设于导光板 9顶面的光学膜片 8及固定于背板 2上的数 个弹性部件 7, 所述光学膜片 8上端设有数个悬挂部 86及左右两第一侧壁 上各长出数个耳朵 82, 所述悬挂部上设有第一通孔 88, 所述耳朵 82上设 有第二通孔 84, 所述背板 2对应该第一通孔 88设有数个悬挂柱 24, 所述 第一通孔 88安装于悬挂柱 24上， 所述弹性部件 7锁紧第二通孔 84并安 装于背板 2上， 从而把光学膜片 8固定于导光板 9顶面上。
在本实施例中， 所述光学膜片 8 左右两第一侧壁上端各长出一耳朵 82。 所述弹性部件 7为 U形， 其开口端两第二侧壁上设有固定孔 72, 所 述背板 2对应固定孔 72位置设有安装支柱 22, 所述弹性部件 7穿过第二 通孔 84, 并通过固定孔 72安装固定于安装支柱 22上， 从而把光学膜片 8 固定于导光板 9上。 所述固定孔 72 为椭圓形， 但不限于椭圓形， 所述安 装支柱 22可以为螺钉， 也可以为与背板 2—体成型的柱体。
所述弹性部件 7采用塑胶制作而成， 在本实施例中， 所述弹性部件 7 采用橡胶或硅胶制作而成。
组装时， 先把弹性部件 7 —第二侧壁上的固定孔 72 套入安装支柱
22, 然后把弹性部件 7另一第二侧壁穿过所述光学膜片 8的第二通孔 84, 并稍微用力把另一第二侧壁上的固定孔 72套入该安装支柱 22上， 此时弹 性部件 7存在一预紧力， 从而把光学膜片 8拉住， 所述光学膜片 8两侧均 有弹性部件 7拉住， 从而可以防止光学膜片 8由于重力力矩作用向中间移 动， 改善了光学膜片 8翘曲的现象， 提高画面质量。 在本实施例中， 安装 支柱 22对应固定孔 72的形状设计成椭圓形柱体。
请参阅图 9及 10, 其为本发明的第二实施例， 此实施例是在第一实施 例的基石出上增设一卡位勾结构。 在本实施例中， 所述弹性部件 7 '形状呈 U 行， 且其一第二侧壁内侧面上设有卡位勾 74, 另一第二侧壁上相对卡位勾 74设有一^ 立孔 75 , 所述卡位 74包括连接杆 742及第一勾部 744, 所述 卡位孔 75相对卡位勾 74设置为方形。 安装时， 所述第一勾部 744卡紧于 卡位孔 75上， 从而把光学膜片 8固定于弹性部件 7'上。
请参阅图 11 及 12, 其为本发明的第三实施例， 在本实施例中， 所述 弹性部件 7"形状呈 U行， 且其两第二侧壁远离固定孔 72'端呈螺纹状。
请参阅图 13及 14, 其为本发明的第四实施例， 所述弹性部件 7" '包括 一底板 77及与该底板 77垂直连接的两第三侧壁 76, 所述两第三侧壁 76 互相垂直， 且两者交界处设有一开口 79, 从而使得两第三侧壁 76可以前 后或左右弯曲。 所述两第三侧壁 76呈 1 字形设置， 其上端设有第二勾部 762, 所述第二勾部 762的形状大小相对光学膜片 8的第二通孔 84设置， 所述底板 77上设有圓形第三通孔 78。
所述背板 2'相对第三通孔 78设有安装孔（未标示 ) , 通过螺钉 24将 该弹性部件 7" '安装固定于安装孔上， 所述第二勾部 762卡紧于耳朵 82的 第二通孔 84上， 从而将光学膜片 8固定于导光板 9上。
安装时， 先用螺丝 24穿过第三通孔 78把该弹性部件 7，"锁紧固定于背 板 2'上， 再将光学膜片 8的第二通孔 84对准两第二勾部 762, 轻压光学膜 片 8, 把第二通孔 84卡紧固定于第二勾部 762上， 利用弹簧原理将光学膜 片 8左右拉紧， 从而可以防止光学膜片 8由于重力力矩作用向中间移动， 改善了光学膜片 8翘曲的现象， 提高画面质量。
请参阅图 15 , 作为一种可供选择的第五实施例， 所述光学膜片 8'上、 下端均设有数个悬挂部 86'及左、 右两第一侧壁上、 下端均各长出一耳朵 82' , 所述悬挂部 86'上设有第一通孔 88' , 所述耳朵 82'上设有第二通孔 84', 所述背板对应该第一通孔 88'设有数个悬挂柱 24', 所述悬挂部 86'悬 挂安装于悬挂柱 24'上， 所述弹性部件 7 锁紧第二通孔 84'并安装与背板 上， 从而把光学膜片 7固定于导光板 9上。 其中， 所述弹性部件 7可以为 实施例 1之 4中的任一种。
综上所述， 本发明提供一种背光模组， 通过在光学膜片的侧壁上长出 耳朵， 并通过弹性部件将耳朵锁紧固定于背板上并利用弹簧原理左右拉 紧， 从而防止光学膜片由于重力力矩作用向中间移动， 改善了光学膜片翘 曲的现象， 提高画面质量。
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、 设于背板内的背光源、 对应背光源 设于背板内的导光板、 设于导光板底面的反射片、 设于导光板顶面的光学 膜片及固定于背板上的数个弹性部件， 所述光学膜片上端设有数个悬挂 部， 所述光学膜片左右两第一侧壁各长出数个耳朵， 所述悬挂部上设有第 一通孔， 所述耳朵上设有第二通孔， 所述背板对应该第一通孔设有数个悬 挂柱， 所述第一通孔安装于悬挂柱上， 所述弹性部件锁紧第二通孔并安装 于背板上， 从而把光学膜片固定于导光板上。
2、 如权利要求 1 所述的背光模组， 其中， 所述光学膜片左右两第一 侧壁上端各长出一耳朵。
3、 如权利要求 1 所述的背光模组， 其中， 所述弹性部件为 U形， 其 开口端两第二侧壁上设有固定孔， 所述背板对应固定孔位置设有安装支 柱， 所述弹性部件穿过第二通孔， 并通过固定孔安装固定于安装支柱上， 从而把光学膜片固定于导光板上。
4、 如权利要求 3 所述的背光模组， 其中， 所述弹性部件一第二侧壁 内侧面上设有卡位勾， 另一第二侧壁上相对卡位勾设有一卡位孔， 安装 时， 所述卡位勾卡紧于卡位孔上， 从而把光学膜片固定于弹性部件上， 所 述卡位勾呈 1 字形， 所述卡位勾包括连接杆及第一勾部， 所述卡位孔相对 卡位勾设置为方形。
5、 如权利要求 3 所述的背光模组， 其中， 所述弹性部件两第二侧壁 远离固定孔端呈螺纹状。
6、 如权利要求 3 所述的背光模组， 其中， 所述弹性部件采用塑胶制 作而成。
7、 如权利要求 3 所述的背光模组， 其中， 所述弹性部件采用橡胶或 硅胶制作而成。
8、 如权利要求 1 所述的背光模组， 其中， 所述弹性部件包括一底板 及与该底板垂直连接的两第三侧壁， 所述两第三侧壁互相垂直， 且两者交 界处设有一开口， 所述两第三侧壁呈 1 字形设置， 其上端设有第二勾部， 所述底板上设有圓形第三通孔。
9、 如权利要求 8 所述的背光模组， 其中， 所述背板相对第三通孔设 有安装孔， 通过螺钉将该弹性部件安装固定于安装孔上， 所述第二勾部卡 紧于耳朵的第二通孔上， 从而将光学膜片固定于导光板上。
10、 如权利要求 1 所述的背光模组， 其中， 所述光学膜片上、 下端均 设有数个悬挂部及左、 右两第一侧壁上、 下端均各长出一耳朵， 所述悬挂 部上设有第一通孔， 所述耳朵上设有第二通孔， 所述背板对应该第一通孔 设有数个悬挂柱， 所述第一通孔安装于悬挂柱上， 所述弹性部件锁紧第二 通孔并安装于背板上， 从而把光学膜片固定于导光板上。
11、 一种背光模组， 包括： 背板、 设于背板内的背光源、 对应背光源 设于背板内的导光板、 设于导光板底面的反射片、 设于导光板顶面的光学 膜片及固定于背板上的数个弹性部件， 所述光学膜片上端设有数个悬挂 部， 所述光学膜片左右两第一侧壁各长出数个耳朵， 所述悬挂部上设有第 一通孔， 所述耳朵上设有第二通孔， 所述背板对应该第一通孔设有数个悬 挂柱， 所述第一通孔安装于悬挂柱上， 所述弹性部件锁紧第二通孔并安装 于背板上， 从而把光学膜片固定于导光板上；
其中所述光学膜片左右两第一侧壁上端各长出一耳朵；
其中所述弹性部件为 u形， 其开口端两第二侧壁上设有固定孔， 所述 背板对应固定孔位置设有安装支柱， 所述弹性部件穿过第二通孔， 并通过 固定孔安装固定于安装支柱上， 从而把光学膜片固定于导光板上；
其中所述弹性部件采用塑胶制作而成。
PCT/CN2012/079226 2012-07-13 2012-07-27 背光模组 Ceased WO2014008686A1 (zh)

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