WO2013131288A1 - 一种背光模组及采用该背光模组的液晶显示装置 - Google Patents

一种背光模组及采用该背光模组的液晶显示装置 Download PDF

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Publication number
WO2013131288A1
WO2013131288A1 PCT/CN2012/072504 CN2012072504W WO2013131288A1 WO 2013131288 A1 WO2013131288 A1 WO 2013131288A1 CN 2012072504 W CN2012072504 W CN 2012072504W WO 2013131288 A1 WO2013131288 A1 WO 2013131288A1
Authority
WO
WIPO (PCT)
Prior art keywords
protrusion
lug
optical film
back plate
backlight module
Prior art date
Application number
PCT/CN2012/072504
Other languages
English (en)
French (fr)
Inventor
唐国富
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 US13/500,811 priority Critical patent/US9104067B2/en
Publication of WO2013131288A1 publication Critical patent/WO2013131288A1/zh

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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
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • 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
    • G02F1/133322—Mechanical guidance or alignment of LCD panel support components
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/46—Fixing elements
    • G02F2201/465—Snap -fit

Definitions

  • the present invention relates to the field of liquid crystal display, and more particularly to a backlight module and a liquid crystal display device using the same.
  • a backlight module and a liquid crystal panel are required in the liquid crystal display device.
  • Some optical films are needed in the backlight module, and the optical film can be used for atomization and brightening, because the backlight module is generally used vertically.
  • the above optical film needs to be positioned.
  • the patent number is 200410091576.X
  • the Chinese invention patent entitled the combination of the optical film and the plastic frame refers to various positioning structures, and the optical film in the prior art. They are all positioned on the plastic frame. Since the optical film is generally thin, about 0.1 ⁇ 0.6mm, the small and medium size backlight modules are generally positioned by the like, but in the large size backlight module, the optical film size is compared.
  • the hanging positioning is used to solve the problem of self-weight deformation of the optical film.
  • the optical film lug is punched and directly hung on the plastic frame.
  • the size of the edge of the hole cannot be made too small, otherwise there will be difficulties in the process;
  • the invention patent also discloses a solution for the lug on the optical film, the lug And a root portion including deployment, by hanging lugs on the convex sidewall rubber block, this structure is suitable for narrow border backlight module.
  • the above two positioning methods have not solved the positioning of the optical film in the vertical direction of the plane of the optical film, which may cause warpage of the optical film.
  • the small-sized backlight module can be taped due to the small amount of deformation of the optical film.
  • the optical film is pasted on the plastic frame, but the tape bonding method is not suitable for the large-sized backlight module, because the optical film can be attached to a very limited part, the adhesive force of the tape is easily insufficient, and there is a certain hidden danger, and the large size
  • the backlight module generally uses an elastic metal piece to clamp the optical film on the plastic frame, but the elastic metal piece has high cost and does not have a cost advantage.
  • the technical problem to be solved by the present invention is to provide a structure with a single cylinder, convenient assembly and low cost.
  • Optical module and liquid crystal display device are provided.
  • a backlight module comprising: a back plate and an optical film disposed on the back plate, wherein the optical film is provided with a lug for positioning, the lug has a portion and An outwardly extending deployment portion, the expanded portion has a width greater than a width of the root portion, a sidewall of the back plate is provided with a first protrusion, and the first protrusion is provided with an opening, the optical film
  • the root of the lug is received at the opening, the second side of the back plate is further provided with a second protrusion, the second protrusion has an extension, and the expansion portion of the lug of the optical film is accommodated in the second
  • the back plate is made of a metal material, and the first protrusion and the second protrusion are integrally formed with the back plate, and the root of the optical film lug and the first protrusion of the back plate are opened.
  • the inner side surface of the unfolding portion of the lug is in contact with the outer side surface of the first protrusion
  • the lug of the optical film is located on one side of the optical film
  • the unfolding portion of the lug is parallel to the side Extending on both sides
  • the second protrusion is located at two of the lug expansion portions
  • the distance between the second protrusions is smaller than the length of the lug expansion portion
  • the lug of the optical film is trapezoidal
  • the extension of the second protrusion of the back plate is further provided with a convenient optical film lug a chamfer that slides in the expansion portion
  • a groove is further disposed below the second protrusion extending portion of the back plate, the bottom of the groove is lower than the bottom of the opening of the first protrusion, and the width of the groove is greater than or equal to the optical The width of the diaphragm lug deployment.
  • a backlight module comprising: a back plate and an optical film disposed on the back plate, wherein the optical film is provided with a lug for positioning, and the lug has a a root portion and an outwardly extending expansion portion, the width of the expansion portion being greater than a width of the root portion, a first protrusion being disposed on a sidewall of the back plate, and an opening is disposed on the first protrusion, the optical film
  • the root of the lug of the sheet is received at the opening, and the second side of the back plate is further provided with a second protrusion, and the second protrusion has an extension portion, and the expansion portion of the lug of the optical film is accommodated Below the second raised extension.
  • the back plate is made of metal, and the first protrusion and the second protrusion are integrally stamped with the back plate.
  • the integral molding can better control the cost of the backboard, and basically does not increase the cost significantly by adding the first protrusion and the second protrusion. Since the backboard is made of metal, the strength of the first protrusion and the second protrusion structure High, can withstand large deformation forces, and better ensure the positioning accuracy of the optical film.
  • the root of the optical film lug corresponds to the opening shape of the first protrusion of the back plate, and is convex.
  • the inner side surface of the unfolded portion of the ear is fitted to the outer side surface of the first protrusion.
  • the optical film is positioned in both its length and width directions, that is, the optical film The piece does not move in its plane direction.
  • the lug of the optical film is located on one side of the optical film, the developed portion of the lug extends on both sides in a direction parallel to the side, and the second protrusion is located at two sides of the lug expansion portion.
  • the side, and the spacing between the second protrusions is less than the length of the lug deployment.
  • the lug of the optical film is located on one side of the optical film, and the developed portion of the lug extends one side in a direction parallel to the side.
  • the lugs are disposed at corners of the optical film, the unfolding portions of the lugs extend along the sides of the corners, and the second protrusions on the back plate and the extension portions thereof are located at the corners On both side walls.
  • the lug of the optical film is trapezoidal.
  • the entire side of the trapezoid can be stressed, the force is better than the T-shaped lug, and the positioning correction ability is better.
  • the extension of the second protrusion of the back plate is further provided with a chamfer which facilitates sliding of the expansion portion of the optical film lug.
  • the chamfering can make the optical film installation smooth, and reduce the probability that the lug expansion portion is bent and deformed, so as to improve the yield.
  • a groove is further disposed below the second protrusion extending portion of the back plate, and a bottom of the groove is lower than a bottom of the opening of the first protrusion, and a width of the groove is greater than or equal to an expansion portion of the optical film lug The width.
  • the main function of the groove here is to provide a deformation space for the lug expansion portion when the optical film is plural, so that the expansion portion smoothly enters below the second projection extension.
  • the invention also discloses a liquid crystal display device, comprising: a backlight module, the backlight module comprises a back plate and an optical film disposed on the back plate, wherein the optical film is provided with a lug for positioning,
  • the lug has a portion and an outwardly extending expansion portion, the width of the expansion portion is greater than the width of the root portion, and the first protrusion is disposed on the sidewall of the back plate, and the first protrusion is provided with a first protrusion
  • An opening, a root of the lug of the optical film is received at the opening, and a sidewall of the back plate is further provided with a second protrusion, the second protrusion has an extension, a lug of the optical film The expanded portion is placed below the second raised extension.
  • the back plate is made of metal, and the first protrusion and the second protrusion are integrally stamped with the back plate. Type.
  • the root of the optical film lug corresponds to the opening shape of the first protrusion of the back plate, and the inner side surface of the protruding portion of the lug is in contact with the outer side surface of the first protrusion.
  • the lug of the optical film is located on one side of the optical film, the developed portion of the lug extends on both sides in a direction parallel to the side, and the second protrusion is located at two sides of the lug expansion portion.
  • the side, and the spacing between the second protrusions is less than the length of the lug deployment.
  • the lug of the optical film is located on one side of the optical film, and the developed portion of the lug extends one side in a direction parallel to the side.
  • the lugs are disposed at corners of the optical film, the unfolding portions of the lugs extend along the sides of the corners, and the second protrusions on the back plate and the extension portions thereof are located at the corners On both side walls.
  • the lug of the optical film is trapezoidal.
  • the extension of the second protrusion of the back plate is further provided with a chamfer which facilitates sliding of the expansion portion of the optical film lug.
  • a groove is further disposed below the second protrusion extending portion of the back plate, and a bottom of the groove is lower than a bottom of the opening of the first protrusion, and a width of the groove is greater than or equal to an expansion portion of the optical film lug The width.
  • the backlight module of the present invention When assembling the optical film, the backlight module of the present invention firstly aligns the root of the optical film lug with the opening on the first protrusion of the back plate, and then presses down the expansion portion of the lug. Since the expansion portion and the extension portion of the second protrusion on the back plate interfere somewhat, the optical film itself is thin and elastic, and the deformation portion can be slightly pushed to push the expansion portion below the second protrusion extension portion.
  • the expansion portion recovers the deformation after passing through the extension of the second protrusion, and the root of the optical film lug also enters the opening in the first protrusion of the back plate, and the length of the optical film in the plane of the lug
  • the positioning is obtained in both the width direction and the width direction, and the extension of the second projection positions the optical film in the vertical direction of the plane.
  • the optical film of the backlight module of the invention is positioned on the back plate instead of the plastic frame in the prior art, and the optical film bearing surface is disposed on the back plate, and the optical film bearing surface can be the surface of the light guide plate, and the installation is more
  • the probability of bending deformation of the optical film can be reduced during positioning, and optical experiments show that if the substrate of the optical film (generally PET) is not in close contact with the light guide plate of the back plate, the brightness will decrease;
  • Membrane The positioning of the film on the back plate allows the optical film to be closely attached to the light guide plate, and the brightness of the backlight module is increased compared with the prior art.
  • the present invention no longer uses an adhesive tape and an elastic metal sheet to position the optical film in its plane perpendicular direction, but provides a second protrusion on the back plate, and the extension of the second protrusion prevents the lug of the optical film from being
  • the movement of the optical film in the vertical direction of the plane is very low, the installation cost of the second protrusion is very low, the installation method of the optical film is simple, saving time and labor, and the positioning is very reliable, and is applicable to various sizes of backlight modules, especially Suitable for large size backlight modules.
  • FIG. 1 is a partial front elevational view of a first embodiment of a backlight module of the present invention
  • FIG. 2 is a partial perspective view of a first embodiment of a backlight module of the present invention
  • FIG. 3 is a plan view showing an optical film in the first embodiment of the backlight module of the present invention.
  • FIG. 4 is a plan view showing an optical film in which the lug of the backlight module of the present invention is trapezoidal;
  • FIG. 5 is a plan view showing an optical film extending from one side of the lug of the backlight module of the present invention.
  • Figure 6 is a plan view of the optical film at the corner of the lug of the backlight module of the present invention.
  • optical film 11, lug; 111, root; 112, expansion; 2, back plate; 21, first protrusion; 211, opening; 22, second protrusion; 221, extension; 222, chamfering; 23, groove.
  • the present invention discloses a liquid crystal display device including a backlight module.
  • the backlight module includes a back plate 2 and an optical film disposed on the back plate 2. 1 .
  • the optical film 1 is provided with a lug 11 for positioning.
  • the lug 11 has a portion 111 and an outwardly extending deployment portion 112.
  • the width of the deployment portion 112 is greater than the width of the root portion 111.
  • a first protrusion 21 is disposed on the side wall of the back plate 2, and an opening 211 is defined in the first protrusion 21, and the root portion 111 of the lug 11 of the optical film 1 is received at the opening 211.
  • the second protrusion 22 is further disposed on the side wall of the back plate 2, and the second protrusion 22 has an extending portion 221, and the expanding portion 112 of the lug 11 of the optical film 1 is accommodated in the second protrusion 22 Below the part 221.
  • the back plate 2 is made of a metal material, and the first protrusion 21 and the second protrusion 22 are integrally formed with the back plate 2, and the integral molding can better control the cost of the back plate 2, and the basic The cost of the first protrusion 21 and the second protrusion 22 is not increased because the back plate 2 is made of metal.
  • the first protrusion 21 and the second protrusion 22 have high structural strength and can withstand large deformation. The force is better to ensure the positioning accuracy of the optical film 1.
  • the lug 11 of the optical film 1 is located on one side of the optical film 1.
  • the expanded portion 112 of the lug 11 extends on both sides in a direction parallel to the side, and the shape of the lug 11 is near.
  • the second protrusion extensions 221 are located on both sides of the lug deployment portion 112, and the spacing between the second protrusion extensions 221 is smaller than the length of the lug deployment portion 112, thereby making the lug
  • the deployment portion 112 is confined below the second convex extension 221 .
  • the root portion 111 of the optical film lug 11 corresponds to the shape of the opening 211 of the first protrusion 21 of the back plate 2, and the inner side surface of the unfolding portion 112 of the lug is attached to the outer side surface of the first protrusion 21. Hehe. Relying on the root portion 111 of the lug 11 and the opening 211 of the first protrusion 21, and the inner side surface of the unfolding portion 112 of the lug 11 is engaged with the outer side surface of the first protrusion 21, so that the optical film 1 is at its length and The width direction is positioned, that is, the optical film 1 does not move in the planar direction.
  • the root portion 111 of the lug of the optical film 1 is first aligned with the opening 211 of the first protrusion 21 of the back plate, and then the expansion portion 112 of the lug is pressed downward, due to
  • the expansion portion 112 and the second protrusion extending portion 221 on the back plate 2 may interfere somewhat, but the optical film 1 itself is thin and elastic, and the expansion portion 112 may be slightly deformed to push the expansion portion 112 to the second convex portion.
  • the expansion portion 112 passes through the extension portion 221 of the second protrusion, and then the deformation is resumed.
  • the root portion 111 of the optical film lug also enters the opening 211 on the first protrusion of the back plate.
  • the lug 11 positions the optical film 1 in both its length and width directions, while the second raised extension 221 positions the optical film 1 in its plane perpendicular direction.
  • the optical film 1 of the backlight module of the present invention is positioned on the back plate 2 instead of the plastic frame in the prior art, and the optical film bearing surface is disposed on the back plate 2, and the optical film bearing surface can be the surface of the light guide plate.
  • the installation is more convenient, and the probability of bending deformation of the optical film can be reduced during positioning; If the substrate of the optical film 1 (generally PET) is not in close contact with the light guide plate of the back sheet 2, the brightness will decrease.
  • the optical film 1 of the present invention is positioned on the back plate 2, so that the optical film 1 and the light guide plate can be closely adhered. Compared with the prior art, the brightness of the backlight module is increased.
  • the present invention no longer uses an adhesive tape and an elastic metal sheet to position the optical film in its plane perpendicular direction, but a second protrusion 22 is provided on the back plate 2, and the extension portion 221 of the second protrusion can prevent the optical film from being removed.
  • the movement of the lug 11 in the vertical direction of the plane of the optical film, the cost of providing the second protrusion 22 is very low, the installation mode of the optical film 1 is simple, saving time and labor, and the positioning is very reliable, and the backlight is of various sizes.
  • the modules are suitable for use in large-size backlight modules.
  • the extending portion 221 of the second protrusion of the back plate is further provided with a chamfer 222 for facilitating the sliding portion 112 of the optical film lug to slide in.
  • the chamfer 222 can smoothly install the optical film 1 and reduce the probability of the lug expansion portion 112 being bent and deformed to improve the yield.
  • a recess 23 is further disposed below the second protrusion extending portion 221 of the backboard, and a bottom of the recess 23 is lower than a bottom of the opening 211 of the first protrusion, and a width of the groove 23 is greater than or equal to The width of the optical diaphragm lug deployment portion 112.
  • the main function of the recess 23 is to provide a space for deformation of the lug deployment portion 112 when the optical film 1 is plural, so that the unfolding portion 112 smoothly enters below the second projection extension portion 221.
  • the lug 11 of the optical film may also be trapezoidal, as shown in FIG. 4, and also includes a root portion 111 and a developing portion 112.
  • the entire side of the trapezoid may be subjected to a force, and the force is better than
  • the T-shaped lugs are better and the positioning correction ability is better.
  • the lug 11 of the optical film 1 of the backlight module of the present invention may also be located on one side of the optical film 1.
  • the unfolding portion 112 of the lug extends on one side in a direction parallel to the side, as shown in FIG.
  • the extension of the second projection on the plate only needs to extend in one direction, and the above advantageous effects can also be achieved.
  • the lug 11 of the optical film 1 of the backlight module of the present invention may also be disposed at a corner of the optical film 1. As shown in FIG. 6, the unfolded portion 112 of the lug extends in the direction of both sides of the corner, The second protrusion on the back plate and its extension are located on the two side walls of the corner. In the same principle, the lug cooperates with the first protrusion to position the optical film in the plane direction thereof, and the expansion portion of the lug Cooperating with the extension of the second protrusion to obtain the positioning of the optical film in the vertical direction of the plane, which can achieve the beneficial effects described in the above embodiments fruit.

Abstract

一种背光模组及采用此背光模组的液晶显示装置。背光模组包括背板（2）和设置在背板（2）上的光学膜片（1），光学膜片（1）上设有用于定位的凸耳（11），凸耳（11）具有一根部（111）和一向外延伸的展开部（112），展开部（112）的宽度大于根部（111）的宽度，背板（2）的侧壁上设有第一凸起（21），第一凸起（21）上设有一开口（211），光学膜片（1）的凸耳（11）的根部（111）容置在开口（211）处，背板（2）的侧壁上还设有第二凸起（22），第二凸起（22）具有延伸部（221），光学膜片（1）的凸耳（11）的展开部（112）容置于第二凸起（22）延伸部（221）的下方。在背板（2）上设置第二凸起（22），第二凸起（22）的延伸部（221）可以防止光学膜片（1）的凸耳（11）在光学膜片（1）平面垂直方向上的移动，设置第二凸起（22）的成本非常低，光学膜片（1）的安装方式简单，省时省力。

Description

一种背光模组及釆用该背光模组的液晶显示装置
【技术领域】
本发明涉及液晶显示领域， 更具体的说， 涉及一种背光模组及采用此背光 模组的液晶显示装置。
【背景技术】
液晶显示装置中需要用到背光模组和液晶面板， 背光模组中需要采用一些 光学膜片， 此类光学膜片可以起到雾化、 增亮等作用， 由于背光模组一般为立 式使用， 需要对上述光学膜片进行定位， 如专利号为 200410091576.X, 发明名 称为光学膜片与胶框之组合结构的中国发明专利中就提到多种定位结构， 现有 技术中光学膜片都是定位在胶框上， 由于光学膜片一般比较薄， 约 0.1~0.6mm, 中小尺寸的背光模组一般采用靠式定位， 但在大尺寸的背光模组中， 由于光学 膜片尺寸比较大， 光学膜片中间会产生自重变形， 无法采用靠式定位， 现有技 术中采用挂式定位来解决光学膜片自重变形问题， 在光学膜片凸耳上打孔， 直 接挂在胶框上， 但孔边缘的尺寸不能做得太小， 否则在工艺上会存在困难； 该 发明专利还公开了在光学膜片上的凸耳的方案， 凸耳包括根部和展开部， 通过 凸耳挂在胶框侧壁的凸起上， 此种结构适合用于窄边框的背光模组。 然而以上 两种定位方式尚未解决光学膜片在光学膜片平面垂直方向的定位， 可能引起光 学膜片的翘曲， 通常情况下小尺寸的背光模组由于光学膜片变形量小， 可以采 用胶带把光学膜片粘贴在胶框上， 但胶带粘贴方式并不适合大尺寸的背光模组， 因为光学膜片可以粘贴的部位非常有限， 胶带的粘贴力容易不足， 会存在一定 隐患， 大尺寸的背光模组一般采用弹性金属片把光学膜片夹紧在胶框上， 但弹 性金属片成本高， 不具备成本优势。
【发明内容】
本发明所要解决的技术问题是提供一种结构筒单、 组装方便、 成本低的背 光模组和液晶显示装置。
本发明的技术方案为： 一种背光模组， 包括： 背板和设置在背板上的光学 膜片， 所述光学膜片上设有用于定位的凸耳， 所述凸耳具有一根部和一向外延 伸的展开部， 所述展开部的宽度大于根部的宽度， 所述背板的侧壁上设有第一 凸起， 所述第一凸起上设有一开口， 所述光学膜片的凸耳的根部容置在开口处， 所述背板的侧壁上还设有第二凸起， 所述第二凸起具有延伸部， 光学膜片的凸 耳的展开部容置于第二凸起延伸部的下方， 所述背板为金属材质， 第一凸起和 第二凸起与背板为一体沖压成型， 所述光学膜片凸耳的根部与背板第一凸起的 开口形状相对应， 凸耳的展开部内侧面与第一凸起的外侧面相贴合， 所述光学 膜片的凸耳位于光学膜片的一条边上， 凸耳的展开部在与该边平行的方向上两 侧延伸， 所述第二凸起位于凸耳展开部的两侧， 且第二凸起之间的间距小于凸 耳展开部的长度， 所述光学膜片的凸耳为梯形， 所述背板第二凸起的延伸部上 还设有方便光学膜片凸耳的展开部滑入的倒角， 所述背板第二凸起延伸部的下 方还设有凹槽， 凹槽的底部低于第一凸起上开口的底部， 凹槽的宽度大于或等 于光学膜片凸耳展开部的宽度。
本发明的另一种技术方案为： 一种背光模组， 包括背板和设置在背板上的 光学膜片， 所述光学膜片上设有用于定位的凸耳， 所述凸耳具有一根部和一向 外延伸的展开部， 所述展开部的宽度大于根部的宽度， 所述背板的侧壁上设有 第一凸起， 所述第一凸起上设有一开口， 所述光学膜片的凸耳的根部容置在开 口处， 所述背板的侧壁上还设有第二凸起， 所述第二凸起具有延伸部， 光学膜 片的凸耳的展开部容置于第二凸起延伸部的下方。
优选的， 所述背板为金属材质， 第一凸起和第二凸起与背板为一体沖压成 型。 一体成型可以较好地控制背板的成本， 基本上不会因为增加第一凸起和第 二凸起而明显增加成本， 由于背板为金属材质， 第一凸起和第二凸起结构强度 高， 可以承受较大的变形力， 较好地保证光学膜片的定位精度。
优选的， 所述光学膜片凸耳的根部与背板第一凸起的开口形状相对应， 凸 耳的展开部内侧面与第一凸起的外侧面相贴合。 依靠凸耳的根部和第一凸起的 开口配合关系， 及凸耳的展开部内侧面与第一凸起的外侧面配合关系， 使光学 膜片在其长度和宽度方向都得到定位， 即光学膜片不会在其平面方向移动。
优选的， 所述光学膜片的凸耳位于光学膜片的一条边上， 凸耳的展开部在 与该边平行的方向上两侧延伸， 所述第二凸起位于凸耳展开部的两侧， 且第二 凸起之间的间距小于凸耳展开部的长度。
优选的， 所述光学膜片的凸耳位于光学膜片的一条边上， 凸耳的展开部在 与该边平行的方向上单侧延伸。
优选的， 所述凸耳设置在光学膜片的角落处， 凸耳的展开部沿该角的两侧 边的方向延伸， 所述背板上的第二凸起及其延伸部位于该角的两侧壁上。
优选的， 所述光学膜片的凸耳为梯形。 梯形的整个侧边都可以受力， 受力 情况要比 T形的凸耳更好， 定位较正能力也更好。
优选的， 所述背板第二凸起的延伸部上还设有方便光学膜片凸耳的展开部 滑入的倒角。 所述倒角可以使光学膜片安装顺利， 减少凸耳展开部被折弯变形 的机率， 以提高良品率。
优选的， 所述背板第二凸起延伸部的下方还设有凹槽， 凹槽的底部低于第 一凸起上开口的底部， 凹槽的宽度大于或等于光学膜片凸耳展开部的宽度。 此 处凹槽主要作用是当光学膜片为多张时， 给凸耳展开部提供变形空间， 以使展 开部顺利地进入第二凸起延伸部的下方。
本发明还公开了一种液晶显示装置， 包括： 背光模组， 所述背光模组包括 背板和设置在背板上的光学膜片， 所述光学膜片上设有用于定位的凸耳， 所述 凸耳具有一根部和一向外延伸的展开部， 所述展开部的宽度大于根部的宽度， 所述背板的侧壁上设有第一凸起， 所述第一凸起上设有一开口， 所述光学膜片 的凸耳的根部容置在开口处， 所述背板的侧壁上还设有第二凸起， 所述第二凸 起具有延伸部， 光学膜片的凸耳的展开部容置于第二凸起延伸部的下方。
优选的， 所述背板为金属材质， 第一凸起和第二凸起与背板为一体沖压成 型。
优选的， 所述光学膜片凸耳的根部与背板第一凸起的开口形状相对应， 凸 耳的展开部内侧面与第一凸起的外侧面相贴合。
优选的， 所述光学膜片的凸耳位于光学膜片的一条边上， 凸耳的展开部在 与该边平行的方向上两侧延伸， 所述第二凸起位于凸耳展开部的两侧， 且第二 凸起之间的间距小于凸耳展开部的长度。
优选的， 所述光学膜片的凸耳位于光学膜片的一条边上， 凸耳的展开部在 与该边平行的方向上单侧延伸。
优选的， 所述凸耳设置在光学膜片的角落处， 凸耳的展开部沿该角的两侧 边的方向延伸， 所述背板上的第二凸起及其延伸部位于该角的两侧壁上。
优选的， 所述光学膜片的凸耳为梯形。
优选的， 所述背板第二凸起的延伸部上还设有方便光学膜片凸耳的展开部 滑入的倒角。
优选的， 所述背板第二凸起延伸部的下方还设有凹槽， 凹槽的底部低于第 一凸起上开口的底部， 凹槽的宽度大于或等于光学膜片凸耳展开部的宽度。
本发明的有益效果为： 本发明背光模组在组装光学膜片时， 首先使光学膜 片凸耳的根部对准背板第一凸起上的开口， 然后向下按压凸耳的展开部， 由于 展开部与背板上第二凸起的延伸部会有些干涉， 但光学膜片本身较薄且具有弹 性， 稍用力使展开部形变便可以把展开部推至第二凸起延伸部的下方， 展开部 穿过第二凸起的延伸部后便恢复形变， 此时光学膜片凸耳的根部也进入了背板 第一凸起上的开口内， 凸耳使光学膜片在其平面的长度和宽度方向上都得到定 位， 而第二凸起的延伸部则使光学膜片在其平面垂直方向上得到定位。
本发明背光模组光学膜片是定位在背板上， 而不是现有技术中的胶框上， 背板上设有光学膜片承载面， 光学膜片承载面可以为导光板表面， 安装更为方 便， 在定位时可以减少光学膜片折弯变形的机率， 另外光学实验表明， 光学膜 片的基材（一般为 PET )若未贴紧背板的导光板， 亮度将下降； 本发明光学膜 片定位背板上， 可使光学膜片与导光板紧密贴合， 与现有技术相比， 背光模组 亮度有所增加。 本发明不再使用胶带和弹性金属片使光学膜片在其平面垂直方 向上定位， 而是在背板上设置第二凸起， 第二凸起的延伸部可以防止光学膜片 的凸耳在光学膜片平面垂直方向上的移动， 设置第二凸起的成本非常低， 光学 膜片的安装方式筒单， 省时省力， 而且定位非常可靠， 对各种尺寸的背光模组 都适用， 尤其适合大尺寸的背光模组使用。
【附图说明】
图 1是本发明背光模组实施例一的局部正视图；
图 2是本发明背光模组实施例一的局部立体图；
图 3是本发明背光模组实施例一中光学膜片的平面图；
图 4是本发明背光模组所述凸耳为梯形的光学膜片平面图；
图 5是本发明背光模组所述凸耳单侧延伸的光学膜片平面图；
图 6是本发明背光模组所述凸耳位于角落处的光学膜片平面图。
其中： 1、 光学膜片； 11、 凸耳； 111、 根部； 112、 展开部； 2、 背板； 21、 第一凸起； 211、 开口； 22、 第二凸起； 221、 延伸部； 222、 倒角； 23、 凹槽。
【具体实施方式】
本发明公开一种液晶显示装置， 包括背光模组， 作为本发明背光模组的实 施例， 如图 1至 3所示， 背光模组包括背板 2和设置在背板 2上的光学膜片 1 , 所述光学膜片 1上设有用于定位的凸耳 11 , 所述凸耳 11具有一根部 111和一向 外延伸的展开部 112, 所述展开部 112的宽度大于根部 111的宽度， 所述背板 2 的侧壁上设有第一凸起 21 , 所述第一凸起 21上设有一开口 211 , 所述光学膜片 1的凸耳 11的根部 111容置在开口 211处， 所述背板 2的侧壁上还设有第二凸 起 22, 所述第二凸起 22具有延伸部 221 , 光学膜片 1的凸耳 11的展开部 112 容置于第二凸起 22延伸部 221的下方。 本实施例中， 所述背板 2为金属材质， 所述第一凸起 21和第二凸起 22与 背板 2为一体沖压成型， 一体成型可以较好地控制背板 2的成本， 基本上不会 因为增加第一凸起 21和第二凸起 22而明显增加成本， 由于背板 2为金属材质， 第一凸起 21和第二凸起 22结构强度高， 可以承受较大的变形力， 较好地保证 光学膜片 1的定位精度。
本实施例中， 所述光学膜片 1的凸耳 11位于光学膜片 1的一条边上， 凸耳 11的展开部 112在与该边平行的方向上两侧延伸， 凸耳 11的形状近 "T" 形， 所述第二凸起延伸部 221位于凸耳展开部 112的两侧， 且第二凸起延伸部 221 之间的间距小于凸耳展开部 112的长度， 从而使凸耳的展开部 112被限制在第 二凸起延伸部 221的下方。
本实施例中， 所述光学膜片凸耳 11的根部 111与背板 2第一凸起 21的开 口 211形状相对应， 凸耳的展开部 112内侧面与第一凸起 21的外侧面相贴合。 依靠凸耳 11的根部 111和第一凸起 21的开口 211配合关系， 及凸耳 11的展开 部 112内侧面与第一凸起 21的外侧面配合关系， 使光学膜片 1在其长度和宽度 方向都得到定位， 即光学膜片 1不会在其平面方向移动。
本发明背光模组在组装光学膜片 1时， 首先使光学膜片 1 凸耳的根部 111 对准背板第一凸起 21上的开口 211 , 然后向下按压凸耳的展开部 112, 由于展 开部 112与背板 2上第二凸起的延伸部 221会有些干涉， 但光学膜片 1本身较 薄且具有弹性， 稍用力使展开部 112形变便可以把展开部 112推至第二凸起延 伸部 221的下方， 展开部 112穿过第二凸起的延伸部 221后便恢复形变， 此时 光学膜片凸耳的根部 111也进入了背板第一凸起上的开口 211内， 凸耳 11使光 学膜片 1 在其平面的长度和宽度方向上都得到定位， 而第二凸起的延伸部 221 则使光学膜片 1在其平面垂直方向上得到定位。
本发明背光模组光学膜片 1是定位在背板 2上， 而不是现有技术中的胶框 上， 背板 2上设有光学膜片承载面， 光学膜片承载面可以为导光板表面， 安装 更为方便， 在定位时可以减少光学膜片折弯变形的机率； 另外光学实验表明， 光学膜片 1的基材（一般为 PET )若未贴紧背板 2的导光板， 亮度将下降。 本 发明光学膜片 1定位背板 2上， 可使光学膜片 1与导光板紧密贴合， 与现有技 术相比， 背光模组亮度有所增加。 本发明不再使用胶带和弹性金属片使光学膜 片在其平面垂直方向上定位， 而是在背板 2上设置第二凸起 22, 第二凸起的延 伸部 221可以防止光学膜片的凸耳 11在光学膜片平面垂直方向上的移动， 设置 第二凸起 22的成本非常低， 光学膜片 1的安装方式筒单， 省时省力， 而且定位 非常可靠， 对各种尺寸的背光模组都适用， 尤其适合大尺寸的背光模组使用。
本实施例中， 所述背板第二凸起的延伸部 221上还设有方便光学膜片凸耳 的展开部 112滑入的倒角 222。 所述倒角 222可以使光学膜片 1安装顺利， 减少 凸耳展开部 112被折弯变形的机率， 以提高良品率。
本实施例中， 所述背板第二凸起延伸部 221的下方还设有凹槽 23, 凹槽 23 的底部低于第一凸起上开口 211的底部， 凹槽 23的宽度大于或等于光学膜片凸 耳展开部 112的宽度。 此处凹槽 23主要作用是当光学膜片 1为多张时， 给凸耳 展开部 112提供变形空间， 以使展开部 112顺利地进入第二凸起延伸部 221的 下方。
在上述实施例中， 所述光学膜片的凸耳 11还可以为梯形， 如图 4所示， 也 包括根部 111和展开部 112, 梯形的整个侧边都可以受力， 受力情况要比 T形的 凸耳更好， 定位较正能力也更好。
本发明背光模组光学膜片 1的凸耳 11也可以位于光学膜片 1的一条边上， 凸耳的展开部 112在与该边平行的方向上单侧延伸， 如图 5所示， 背板上第二 凸起的延伸部也只需要向一个方向延伸即可， 也能实现上述的有益效果。
本发明背光模组光学膜片 1的凸耳 11也可以设置在光学膜片 1的角落处， 如图 6所示， 凸耳的展开部 112沿该角的两侧边的方向延伸， 所述背板上的第 二凸起及其延伸部位于该角的两侧壁上， 同样原理， 凸耳与第一凸起配合， 使 光学膜片在其平面方向上获得定位， 凸耳的展开部与第二凸起的延伸部配合， 使光学膜片在其平面垂直方向上获得定位， 能实现上述实施例中所述的有益效 果。
以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明， 不 能认定本发明的具体实施只局限于这些说明。 对于本发明所属技术领域的普通 技术人员来说， 在不脱离本发明构思的前提下， 还可以做出若干筒单推演或替 换， 都应当视为属于本发明的保护范围。

Claims

权利要求
1、 一种背光模组， 包括： 背板和设置在背板上的光学膜片， 所述光学膜片 上设有用于定位的凸耳， 所述凸耳具有一根部和一向外延伸的展开部， 所述展 开部的宽度大于根部的宽度， 所述背板的侧壁上设有第一凸起， 所述第一凸起 上设有一开口， 所述光学膜片的凸耳的根部容置在开口处， 所述背板的侧壁上 还设有第二凸起， 所述第二凸起具有延伸部， 光学膜片的凸耳的展开部容置于 第二凸起延伸部的下方， 所述背板为金属材质， 第一凸起和第二凸起与背板为 一体沖压成型， 所述光学膜片凸耳的根部与背板第一凸起的开口形状相对应， 凸耳的展开部内侧面与第一凸起的外侧面相贴合， 所述光学膜片的凸耳位于光 学膜片的一条边上， 凸耳的展开部在与该边平行的方向上两侧延伸， 所述第二 凸起位于凸耳展开部的两侧， 且第二凸起之间的间距小于凸耳展开部的长度， 所述光学膜片的凸耳为梯形， 所述背板第二凸起的延伸部上还设有方便光学膜 片凸耳的展开部滑入的倒角， 所述背板第二凸起延伸部的下方还设有凹槽， 凹 槽的底部低于第一凸起上开口的底部， 凹槽的宽度大于或等于光学膜片凸耳展 开部的宽度。
2、 一种背光模组， 包括： 背板和设置在背板上的光学膜片， 所述光学膜片 上设有用于定位的凸耳， 所述凸耳具有一根部和一向外延伸的展开部， 所述展 开部的宽度大于根部的宽度， 所述背板的侧壁上设有第一凸起， 所述第一凸起 上设有一开口， 所述光学膜片的凸耳的根部容置在开口处， 所述背板的侧壁上 还设有第二凸起， 所述第二凸起具有延伸部， 光学膜片的凸耳的展开部容置于 第二凸起延伸部的下方。
3、 如权利要求 2所述的背光模组， 其特征在于， 所述背板为金属材质， 第 一凸起和第二凸起与背板为一体沖压成型。
4、 如权利要求 2所述的背光模组， 其特征在于， 所述光学膜片凸耳的根部 与背板第一凸起的开口形状相对应， 凸耳的展开部内侧面与第一凸起的外侧面 相贴合。
5、 如权利要求 2所述的背光模组， 其特征在于， 所述光学膜片的凸耳位于 光学膜片的一条边上， 凸耳的展开部在与该边平行的方向上两侧延伸， 所述第 二凸起位于凸耳展开部的两侧， 且第二凸起之间的间距小于凸耳展开部的长度。
6、 如权利要求 2所述的背光模组， 其特征在于， 所述光学膜片的凸耳位于 光学膜片的一条边上， 凸耳的展开部在与该边平行的方向上单侧延伸。
7、 如权利要求 2所述的背光模组， 其特征在于， 所述凸耳设置在光学膜片 的角落处， 凸耳的展开部沿该角的两侧边的方向延伸， 所述背板上的第二凸起 及其延伸部位于该角的两侧壁上。
8、 如权利要求 2所述的背光模组， 其特征在于， 所述光学膜片的凸耳为梯 形。
9、 如权利要求 2所述的背光模组， 其特征在于， 所述背板第二凸起的延伸 部上还设有方便光学膜片凸耳的展开部滑入的倒角。
10、 如权利要求 2所述的背光模组， 其特征在于， 所述背板第二凸起延伸 部的下方还设有凹槽， 凹槽的底部低于第一凸起上开口的底部， 凹槽的宽度大 于或等于光学膜片凸耳展开部的宽度。
11、 一种液晶显示装置， 包括： 背光模组， 所述的背光模组包括背板和设 置在背板上的光学膜片， 所述光学膜片上设有用于定位的凸耳， 所述凸耳具有 一根部和一向外延伸的展开部， 所述展开部的宽度大于根部的宽度， 所述背板 的侧壁上设有第一凸起， 所述第一凸起上设有一开口， 所述光学膜片的凸耳的 根部容置在开口处， 所述背板的侧壁上还设有第二凸起， 所述第二凸起具有延 伸部， 光学膜片的凸耳的展开部容置于第二凸起延伸部的下方。
12、 如权利要求 11所述的液晶显示装置， 其特征在于， 所述背板为金属材 质， 第一凸起和第二凸起与背板为一体沖压成型。
13、 如权利要求 11所述的液晶显示装置， 其特征在于， 所述光学膜片凸耳 的根部与背板第一凸起的开口形状相对应， 凸耳的展开部内侧面与第一凸起的 外侧面相贴合。
14、 如权利要求 11所述的液晶显示装置， 其特征在于， 所述光学膜片的凸 耳位于光学膜片的一条边上， 凸耳的展开部在与该边平行的方向上两侧延伸， 所述第二凸起位于凸耳展开部的两侧， 且第二凸起之间的间距小于凸耳展开部 的长度。
15、 如权利要求 11所述的液晶显示装置， 其特征在于， 所述光学膜片的凸 耳位于光学膜片的一条边上， 凸耳的展开部在与该边平行的方向上单侧延伸。
16、 如权利要求 11所述的液晶显示装置， 其特征在于， 所述凸耳设置在光 学膜片的角落处， 凸耳的展开部沿该角的两侧边的方向延伸， 所述背板上的第 二凸起及其延伸部位于该角的两侧壁上。
17、 如权利要求 11所述的液晶显示装置， 其特征在于， 所述光学膜片的凸 耳为梯形。
18、 如权利要求 11所述的液晶显示装置， 其特征在于， 所述背板第二凸起 的延伸部上还设有方便光学膜片凸耳的展开部滑入的倒角。
19、 如权利要求 11所述的液晶显示装置， 其特征在于， 所述背板第二凸起 延伸部的下方还设有凹槽， 凹槽的底部低于第一凸起上开口的底部， 凹槽的宽 度大于或等于光学膜片凸耳展开部的宽度。
PCT/CN2012/072504 2012-03-07 2012-03-19 一种背光模组及采用该背光模组的液晶显示装置 WO2013131288A1 (zh)

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