WO2015100983A1 - 直下式背光模组测试装置 - Google Patents

直下式背光模组测试装置 Download PDF

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Publication number
WO2015100983A1
WO2015100983A1 PCT/CN2014/080911 CN2014080911W WO2015100983A1 WO 2015100983 A1 WO2015100983 A1 WO 2015100983A1 CN 2014080911 W CN2014080911 W CN 2014080911W WO 2015100983 A1 WO2015100983 A1 WO 2015100983A1
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WO
WIPO (PCT)
Prior art keywords
backlight module
fixing unit
direct type
type backlight
light
Prior art date
Application number
PCT/CN2014/080911
Other languages
English (en)
French (fr)
Inventor
李明君
田云龙
付常佳
Original Assignee
京东方科技集团股份有限公司
北京京东方视讯科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 京东方科技集团股份有限公司, 北京京东方视讯科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US14/409,085 priority Critical patent/US9740033B2/en
Publication of WO2015100983A1 publication Critical patent/WO2015100983A1/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
    • G02F1/1306—Details
    • G02F1/1309—Repairing; Testing
    • 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

Definitions

  • Embodiments of the present disclosure relate to a direct type backlight module test apparatus. Background technique
  • the liquid crystal display device is mainly composed of a liquid crystal display panel for filtering and a backlight module for providing uniform light for the display panel, and the direct type backlight module is a type of backlight module.
  • 1 is a schematic cross-sectional structural view of a direct type backlight module known to the inventors. As shown in FIG.
  • the direct type backlight module includes a plurality of light source members 1 (for example, LED strips), and the light source member 1 is disposed on the bottom portion 21 of the reflector, and the side surface 22 of the reflector is at an angle with the bottom portion 21 of the reflector (
  • the folding cover 2 is for reflecting the light emitted from the light source 1 toward the diffusing plate 3, and the light emitting side of the diffusing plate 3 (the side away from the reflecting cover 2) is provided with an optical film layer 4 (including a prism sheet, an antireflection film)
  • the plurality of film layers are provided, and the light-emitting side of the optical film layer 4 (the side away from the diffusion plate 3) is used to set the display panel 5.
  • 2 is a schematic top plan view of a reflector of a direct type backlight module known in the present invention, wherein the LED strips 1 are arranged in parallel on the bottom portion 21 of the reflector 2. Summary of the invention
  • Embodiments of the present disclosure provide a direct type backlight module testing device.
  • the direct type backlight module includes a light emitting member and an optical member.
  • the test device includes: a light-emitting member fixing unit configured to fix the light-emitting member; an optical member fixing unit configured to fix the optical member on a light-emitting path of the light-emitting member; and a detecting head, It is configured to detect light emitted from the illuminating member and transmitted through the optical member.
  • FIG. 1 is a schematic cross-sectional structural view of a direct type backlight module of the related art
  • 2 is a schematic top view of a reflector of a direct type backlight module of the related art
  • FIG. 3 is a schematic cross-sectional structural view of a direct type backlight module testing apparatus according to an embodiment of the present disclosure.
  • the optical performance of the liquid crystal display device is different from the model of the light source, the reflector, the diffuser, the optical film layer, the display panel, etc. (such as the angle of the flange angle of the reflector), and the setting method (such as the distance between the light source and the diffusion plate) relationship.
  • the new product design process it is often necessary to form various types of components into backlight modules or display devices to test their performance.
  • the dimensions and specifications of different types of components often do not match and it is difficult to assemble directly. Testing by means of a separate manufacturing model is not only costly but also time consuming and labor intensive.
  • One of the technical problems to be solved by the embodiments of the present disclosure is to provide a direct type backlight module test apparatus to solve the problem that the performance of the direct type backlight module cannot be conveniently tested.
  • fixing units for fixing components such as a reflector, a diffusion plate, an optical film layer and the like are respectively provided, so that when testing, only different types of components are selected, and then they are
  • the analog backlight modules for testing can be formed by being fixed on the respective fixed units, and it is not necessary to separately manufacture the model, so the test is simple, the time is short, and the cost is low.
  • the embodiment of the present disclosure provides a direct type backlight module testing device, and the direct type backlight module includes a light emitting member and an optical member.
  • the direct type backlight module testing device includes a light emitting device fixing unit, an optical member fixing unit, and a detecting head 85.
  • the illuminating member fixing unit is configured to fix the illuminating member;
  • the optical member fixing unit is configured to fix the optical member on a light exiting path of the illuminating member;
  • the detecting head is configured to detect the illuminating member Light that is emitted through and through the optic.
  • the illuminating member of the direct type backlight module includes a reflector 2 and a light source member 1 fixed to the inside of the reflector.
  • the illuminating member fixing unit is configured to fix the reflector 2 and the light source member 1 located inside the reticle 2.
  • the reflector 2 is one of the important components of the direct type backlight module, and is made of, for example, a material having high reflectivity such as aluminum.
  • the reflector 2 includes a reflector bottom portion 21 and a reflector side portion 22 at a specific angle (folding angle) with the reflector bottom portion 21, and the light source member 1 (such as an LED light bar, a cold cathode fluorescent tube, etc.) is disposed in the reflector On the bottom portion 21, the reflector 2 can reflect the light emitted from the light source member 1 toward the diffusion plate to enhance the light mixing and improve the light utilization efficiency.
  • the light source member 1 such as an LED light bar, a cold cathode fluorescent tube, etc.
  • the size of the reflector 2, the angle of the hemming angle, and the like have an important influence on the optical performance of the display device; for example, if the angle of the hemming angle of the reflector 2 and the light mixing distance (the distance between the light source member 1 and the diffusing plate 3) If the size of the display panel 5 does not match, a dark area may appear at the four sides of the display panel 5.
  • the illuminating member fixing unit includes a supporting plate 811 for contacting the bottom portion 21 of the reflector for supporting the backlight module to prevent tilting during the testing of the backlight module and affecting the test result.
  • a detachably connected block 812 is provided on the support plate 811 for contacting the side portion 22 of the reflector to fix the reflector 2.
  • the support plate 811 is in contact with the outer side of the reflector bottom 21, and the support plate 811 is provided with a plurality of blocks 812, the block 812 - the angle between the side and the bottom surface thereof and the reflector 2
  • the hem angles are matched such that the sides are in contact with the reflector side 22 and the reflector 2 is "snapped" by interaction with the support plate 811.
  • the block 812 can be detachably coupled to the support plate 811 in a number of different manners, such as the block 812 can be bonded to the support plate 811, or the block 812 can be magnetically attracted thereto.
  • a plurality of small holes may be formed in the support plate 811 or on the support plate 811 for the card block 812 to be inserted therein, etc., which will not be described in detail herein.
  • the block 812 is detachably connected, when the reflector 2 having different sizes and different hem angles is tested, only the block 812 having a corresponding angle between the side and the bottom surface is selected, and the block 812 is set at
  • the reflector 2 can be fixed at a desired position, so that the illuminator fixing unit can be applied to a plurality of different reflectors 2.
  • a scale 8111 for marking the position of the block 812 may also be provided on the support plate 811. That is, the scale 8111 can be set on the support plate 811 to confirm the position of the block 812 so that it can be positioned more accurately.
  • the block 812 can also be replaced by other similar components, for example, it can be a metal piece bent into a "V-shape", and the angle of the apex angle of the V-shaped metal piece can be adjusted (: such as When it is adjusted to different degrees of deformation, so that when the reflector 2 having different hemming angles is to be tested, it is only necessary to adjust the apex angle of the V-shaped metal piece.
  • the optical member fixing unit may be other forms.
  • the optical member fixing unit may be a plate with a recess, the shape, the size, the side angle, and the like of the recess matching the reflector 2, thereby
  • the reflector 2 can be embedded in the recess; when different types of reflectors 2 are to be tested, it is only necessary to replace the plates with different recesses.
  • the optical member fixing unit is configured to fix the diffusion plate 3 and the optical film layer 4 outside the light-emitting side of the light-emitting member fixing unit.
  • the diffuser plate 3 and the optical film layer 4 are used to further homogenize the light from the reflector 2 and increase the light exit angle for better display.
  • the optical member fixing unit includes a plurality of diffusion plate positioning bars 831 for contacting the sides of the diffusion plate 3.
  • the diffuser plate 3 has a cubic structure as a whole, and the two largest main faces are the light incident surface and the light exit surface, and the four faces perpendicular to the light incident surface and the light exit surface are "sideways".
  • the optical member fixing unit can fix the diffusion plate 3 in the testing device by the contact between the diffusion plate positioning bar 831 and the side surface of the diffusion plate 3; for example, the diffusion plate positioning bar 831 can be disposed on each side of the diffusion plate 3 to Guaranteed fixed stability.
  • the "positioning bar” type of fixing structure is simple in form, and the loading and unloading operation is convenient compared to the fixing structure of the boring screw, which can save test time.
  • the optical member fixing unit may include at least one movable diffusion plate positioning strip 831 movable in a plane parallel to the main surface of the diffusion plate 3.
  • a part of the diffusion plate positioning strips 831 can be movable, so that a plurality of different sizes can be fixed by moving the movable diffusion plate positioning bars 831 to a proper position. Diffuser plate 3.
  • At least one of the diffusion plate positioning strips 831 may be fixed, so that one side of the diffusion plate 3 may be first contacted with the at least one fixed diffusion plate positioning strip 831, and then other activities may be dispersed.
  • the plate positioning bar 831 can realize the fixing of the diffusion plate 3.
  • the specific embodiment of the movable diffusion plate positioning bar 831 is various.
  • both ends of the movable diffusion plate positioning bar 831 can be disposed in the sliding rail so that it can move along the sliding rail, and then move to a proper position and then position it.
  • the frame for supporting the movable diffusion plate positioning bar 831 may have a plurality of positioning holes, and the movable diffusion plate positioning bar 831 is disposed in different positioning holes to move to different positions; the movable diffusion plate is positioned here.
  • the implementation of strip 831 will not be described in detail one by one.
  • the shape of the above “diffusion plate positioning bar 831" is various, for example, it may be elongated, thereby expanding the contact area with the side of the diffusion plate 3 to achieve a better fixing effect; or the diffusion plate positioning bar 831 is also It can be a bent "L" shape, so that each of the diffusion plate positioning strips 831 can fix the two sides of the diffusion plate 3, so that only two diffusion plate positioning bars 831 (for example, one fixed, one movable) can be used.
  • the four sides of the fixed diffusion plate 3 are simple in structure and easy to implement.
  • the optic positioning unit further includes a hanging point 832 for suspending the optical film layer 4. Since the material of the optical film layer 4 and the material of the diffusion plate 3 have different coefficients of thermal expansion, the two are usually disposed adjacent to each other but are not bonded together, so that it is necessary to separately fix them.
  • the optical film layer 4 is preferably in close contact with the light-emitting surface of the diffusing plate 3; for this purpose, it can be in the optical member positioning unit (for example, on the diffusion plate positioning strip 831)
  • a hanging point 832 is provided to suspend the optical film layer 4, and the optical film layer 4 is provided with a mounting ear, and the mounting ear passes through the area of 832. This is because the diffusion plate positioning strip 831 itself is for fixing the diffusion plate 3, and the hanging point 832 is directly disposed thereon to easily determine the positional relationship between the diffusion plate 3 and the optical film layer 4.
  • the direct type backlight module testing apparatus of the embodiment of the present disclosure may further include a distance adjusting unit configured to adjust a distance between the light emitting unit fixing unit and the optical member fixing unit.
  • the "mixing distance” refers to the distance between the light source member 1 (such as the LED light bar) and the diffusing plate 3, which is usually between 15 and 40 mm mm, and the light mixing distance determines the direct type backlight.
  • An important parameter of the module performance so the adjustment of the distance has important significance for the performance test of the direct type backlight module.
  • the light mixing distance can be adjusted by setting the distance adjusting unit, so that the direct type backlight module testing device of the embodiment can test the performance of the same component at different light mixing distances.
  • the distance adjustment unit includes a holder 821 and a bolt 822.
  • the holder 821 is disposed outside the light-emitting path of the light-emitting member to which the light-emitting member fixing unit is fixed, and has a nut portion.
  • the fixing frame 821 is disposed outside the back side of the illuminating member fixing unit (ie, the side opposite to the light emitting side of the illuminating member fixing unit);
  • the bolt includes a bolt head and a threaded screw, and the screw is threaded through the fixing frame In the nut portion, the bolt head is rotatably coupled to the illuminating member fixing unit (such as the support plate 811).
  • the bolt 822 when the bolt 822 is rotated, the bolt 822 moves relative to the fixed frame 821 in the direction of the bidirectional horizontal arrow, thereby driving the support plate 811 to move in the direction of the bidirectional horizontal arrow, that is, to be mounted on the support plate.
  • the reflector 2 and the light source member 1 on the 811 are moved in the direction of the bidirectional horizontal arrow, so that the light mixing distance can be changed.
  • the bolt type distance adjusting unit has a simple and stable structure, and can achieve high adjustment precision if the scale is matched.
  • the distance adjustment unit can also be other implementation forms; for example, the support plate 811 can be disposed on the slide rail so that it can move along the slide rail to adjust the light mixing distance; no further implementation of the distance adjustment unit is performed here.
  • the form is described one by one.
  • the detecting head 85 is disposed on the light exiting side of the optical member fixing unit, and is configured to detect light transmitted through the diffusing plate 3 and the optical film layer 4.
  • the detecting head 85 is disposed on the detecting bracket 86, and the detecting bracket 86 can move the detecting head 85 in a plane parallel to the diffusing plate 3, for example, in the direction of the bidirectional vertical arrow shown in Fig. 3.
  • the detecting head 85 can be disposed on a detecting bracket 86, and the detecting bracket 86 can move the detecting head 85 to test light emitted from different positions; for example, the detecting bracket 86 can be in the form of a microphone holder .
  • the direct type backlight module testing apparatus of the embodiment further includes a display panel fixing unit for fixing the display panel 5 between the optical member fixing unit and the detecting head 85, thereby obtaining more realistic test results. .
  • the direct type backlight module testing device of the embodiment can also fix the display panel 5, so that the detecting head 85 can detect the light filtered by the display panel 5, and better determine the backlight module and the display panel.
  • the display panel fixing unit includes: a plurality of panel positioning bars 841 for contacting the side of the display panel 5.
  • the display panel 5 has a cubic structure as a whole, and the two largest main faces are the light incident surface and the light exit surface, and the four surfaces perpendicular to the light incident surface and the light exit surface are “side surfaces”.
  • the panel positioning bar 841 includes: at least one movable panel positioning bar 841 that is movable in a plane parallel to the major surface of the display panel 5.
  • the display panel fixing unit can be in the form of a positioning bar similar to the above-mentioned diffusing plate 3 fixing unit, and a part of the panel positioning bar 841 can also be movable to accommodate different sizes of the display panel 5.
  • the panel positioning bar 841 and the diffusion plate positioning bar 831 may be integrally connected, that is, one positioning bar can simultaneously serve to fix the display panel 5 and the diffusion plate 3 to simplify the structure of the device.
  • the direct type backlight module testing apparatus may further include other components not shown in FIG.
  • the other components include support structures (such as frames) configured to support the respective positioning strips and support plates 811 described above; at the same time, the support structures may be connected together, for example, by some connectors or the like, to The direct type backlight module test apparatus of the embodiment is formed in one piece; these support structures, connectors, and the like can take many known forms.
  • support structures such as frames
  • the support structures may be connected together, for example, by some connectors or the like, to
  • the direct type backlight module test apparatus of the embodiment is formed in one piece; these support structures, connectors, and the like can take many known forms.
  • a plurality of inserts may be inserted into the holes of the fixing frame 821 on the back side of the support plate 811 (the side away from the reflector 2) to ensure the stability of the support plate 811. Sex.
  • a strip 89 for blocking the edge of the light exiting surface of the display panel 5 to prevent the display panel 5 from falling.
  • the display panel may be: a passive light emitting display panel that requires a backlight module, such as a liquid crystal display panel or an electronic paper.
  • a direct type backlight module testing device wherein the direct type backlight module includes a light emitting member and an optical member, and the testing device includes:
  • a illuminating member fixing unit configured to fix the illuminating member
  • An optical member fixing unit configured to fix the optical member on a light path of the light emitting member
  • the detecting head is configured to detect light emitted from the illuminating member and transmitted through the optical member.
  • a display panel fixing unit configured to fix the display panel between the optical member fixed to the optical member fixing unit and the detecting head.
  • the distance adjusting unit is configured to adjust a distance between the illuminating unit fixing unit and the optical unit fixing unit.
  • a fixing frame disposed outside the light-emitting path of the light-emitting member fixed by the light-emitting member fixing unit and having a nut portion;
  • the bolt includes a bolt head and a threaded screw, the screw being threaded into the nut portion of the holder, the bolt head being rotatably coupled to the illuminating member fixing unit.
  • the direct type backlight module test apparatus according to any one of (1) to (6), wherein the light-emitting member includes a reflector and a light source member fixed on the reflector, the light-emitting member is fixed
  • the unit includes:
  • optical member includes a diffusion plate
  • optical member fixing unit includes a plurality of surfaces for contacting the diffusion plate Diffuser plate positioning strip.
  • optical member fixing unit further comprising: for hanging the optical The hanging point of the film layer.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种直下式背光模组测试装置，所述测试装置包括：发光件固定单元，构造为用于固定发光元件；光学件固定单元，构造为用于将光学件固定在所述发光件的出光路径上；检测头（85），构造为用于检测自所述发光件发出且透过所述光学件的光。

Description

直下式背光模组测试装置 技术领域
本公开的实施例涉及直下式背光模组测试装置。 背景技术
液晶显示装置主要由用于进行滤光的液晶显示面板和用于为显示面板提 供均匀光线的背光模组组成， 而直下式背光模组是背光模组的一种。 图 1为 本发明人已知的一种直下式背光模组的剖面结构示意图。 如图 1所示， 直下 式背光模组包括多个光源构件 1(例如 LED灯条)， 光源构件 1设在反光罩底 部 21上， 反光罩侧面 22与反光罩底部 21间呈一定夹角 (折边角）， 反光罩 2 用于将光源 1发出的光反射向扩散板 3， 扩散板 3出光侧 (远离反光罩 2的一 侧)设有光学膜层 4(包括棱镜片， 增透膜等多个膜层)， 光学膜层 4出光侧 (远 离扩散板 3的一侧)用于设置显示面板 5。 图 2为本发明人已知的一种直下式 背光模组的反光罩的俯视结构示意图，其中 LED灯条 1平行排列设置于反光 罩 2的底部 21上。 发明内容
本公开的实施例提供一种直下式背光模组测试装置。 所述直下式背光模 组包括发光件和光学件。 所述测试装置包括： 发光件固定单元， 构造为用于 固定所述发光件； 光学件固定单元， 构造为用于将所述光学件固定在所述发 光件的出光路径上； 以及检测头， 构造为用于检测自所述发光件发出且透过 所述光学件的光。 附图说明
为了更清楚地说明本公开实施例的技术方案， 下面将对实施例或相关技 术描述中所需要使用的附图作简单地介绍， 显而易见地， 下面描述中的附图 仅仅涉及本公开的一些实施例， 并非对本公开的限制。
图 1为相关技术的直下式背光模组的剖面结构示意图； 图 2为相关技术的直下式背光模组的反光罩的俯视结构示意图； 图 3 为本公开实施例提供的直下式背光模组测试装置的剖面结构示意 图。 具体实施方式
下面将结合附图，对本公开实施例中的技术方案进行清楚、完整地描述， 显然， 所描述的实施例仅仅是本公开一部分实施例， 而不是全部的实施例。 基于本公开中的实施例， 本领域普通技术人员在没有做出创造性劳动前提下 所获得的所有其他实施例， 都属于本公开保护的范围。
液晶显示装置的光学性能与光源、 反光罩、 扩散板、 光学膜层、 显示面 板等部件的型号 (如反光罩折边角的角度)、 设置方式 (如光源与扩散板间的距 离)均有关系。在新产品设计过程中，往往需要将各种不同型号的部件组成背 光模组或显示装置以测试其性能， 但是， 不同型号的部件的尺寸、 规格等往 往并不匹配从而难以直接组装起来，而要通过单独制造模型的方式进行测试， 这样不仅成本高而且费时费力。 本公开的实施例所要解决的技术问题之一是 提供一种直下式背光模组测试装置以解决不能方便的测试直下式背光模组的 性能的问题。
本公开的实施例的直下式背光模组测试装置中， 分别设有用于固定反光 罩、 扩散板、 光学膜层等部件的固定单元， 从而在测试时， 只要选择不同型 号的部件， 再将它们分别固定在各自的固定单元上即可形成用于测试的模拟 背光模组， 而不必再单独制造模型等， 故其测试简单， 耗时短， 成本低。
本公开实施例提供一种直下式背光模组测试装置， 所述直下式背光模组 包括发光件和光学件。 如图 3所示， 所述直下式背光模组测试装置包括发光 件固定单元、 光学件固定单元和检测头 85。 发光件固定单元构造为用于固定 所述发光件； 光学件固定单元构造为用于将所述光学件固定在所述发光件的 出光路径上； 检测头构造为用于检测自所述发光件发出且透过所述光学件的 光。
在一个示例中， 所述直下式背光模组的发光件包括反光罩 2和固定于反 光罩内侧的光源构件 1。 所述发光件固定单元构造为用于固定反光罩 2和位 于反光罩 2内的光源构件 1。 反光罩 2是直下式背光模组的重要部件之一， 其例如由铝等高反射率的 材料制成。反光罩 2包括反光罩底部 21和与反光罩底部 21间呈特定夹角 (折 边角）的反光罩侧部 22，光源构件 1(如 LED灯条、冷阴极荧光管等)设置在反 光罩底部 21上，从而反光罩 2能将光源构件 1发出的光线反射向扩散板，以 增进混光并提高光线利用率。 其中， 反光罩 2的尺寸、 折边角角度等对显示 装置的光学性能有重要影响； 例如， 若反光罩 2的折边角角度与混光距离 (光 源构件 1与扩散板 3间的距离）、显示面板 5尺寸等不匹配， 则会导致显示面 板 5的四边处出现暗区。
例如，如图 3所示，发光件固定单元包括用于与反光罩底部 21接触的支 撑板 811， 用于为背光模组提供支撑， 防止背光模组测试过程中发生倾斜， 影响测试结果。
在支撑板 811上设置有可拆卸连接的卡块 812， 卡块 812用于与反光罩 侧部 22接触以固定反光罩 2。
也就是说， 如图 3所示， 支撑板 811与反光罩底部 21的外侧接触， 且该 支撑板 811上设置有多个卡块 812， 卡块 812—侧面与其底面的夹角与反光 罩 2的折边角匹配， 从而该侧面可与反光罩侧部 22接触， 通过与支撑板 811 的共同作用将反光罩 2 "卡" 固定。
在一个示例中， 卡块 812可通过多种不同的方式实现与支撑板 811间的 可拆卸连接， 例如卡块 812可粘结在支撑板 811上， 或卡块 812可通过磁性 等方式吸附在支撑板 811上， 或支撑板 811上可设有许多小孔以供卡块 812 插接在其中等； 在此不再逐一详细描述。
由于卡块 812是可拆卸连接的， 故当测试具有不同尺寸、 不同折边角的 反光罩 2时， 只要选用侧面与底面间具有相应夹角的卡块 812， 并将该卡块 812设在所需位置处，即可固定反光罩 2，从而使发光件固定单元可适用于多 种不同的反光罩 2。
在一个示例中， 如图 3所示， 支撑板 811上还可设有用于标记卡块 812 位置的刻度 8111。 也就是说， 可通过在支撑板 811上设置刻度 8111以便于 确认卡块 812的位置， 从而使其能被更准确的定位。
在另一示例中， 卡块 812也可被其他类似的部件代替， 例如， 其可以是 一个弯折成 "V字形" 的金属片， 该 V字形金属片的顶角角度可调节 (：如通 过使其发生不同程度的变形调节）， 从而当要测试具有不同折边角的反光罩 2 时， 只要调整 V字形金属片的顶角即可。
在另一示例中， 光学件固定单元也可以是其他形式， 例如， 光学件固定 单元可为带有凹陷部的板， 该凹陷部的形状、 尺寸、 侧边角度等与反光罩 2 匹配， 从而反光罩 2可被嵌入凹陷部中； 当要测试不同型号的反光罩 2时， 只要更换具有不同凹陷部的板即可。
在本公开实施例提供的直下式背光模组测试装置中， 光学件固定单元构 造为用于将扩散板 3和光学膜层 4固定在发光件固定单元的出光侧外。
扩散板 3和光学膜层 4用于对来自反光罩 2的光线进行更进一步的均匀 化处理， 并增大出光角度， 以达到更好的显示效果。
在一个示例中， 光学件固定单元包括多个用于与扩散板 3侧面接触的扩 散板定位条 831。 其中， 扩散板 3整体上为立方体结构， 其最大的两个相对 的主面为入光面和出光面， 而与入光面和出光面垂直的四个面为其 "侧面"。 光学件固定单元可通过扩散板定位条 831和扩散板 3侧面之间的接触， 使扩 散板 3固定于测试装置中； 例如， 可对扩散板 3的每个侧面都设置扩散板定 位条 831以保证固定的稳定性。 这种 "定位条" 式的固定结构形式简单， 且 相对于釆用螺丝的固定结构， 其装卸操作也很方便， 可节省试验时间。
在一个示例中， 光学件固定单元可包括至少一个能在平行于扩散板 3的 主面的平面内移动的活动扩散板定位条 831。
也就是说， 在多个扩散板定位条 831中， 可有部分扩散板定位条 831是 能活动的， 从而只要将这些活动扩散板定位条 831移动到合适的位置即可固 定多种不同尺寸的扩散板 3。
从简化结构的角度出发，也可以有至少一个扩散板定位条 831是固定的， 这样安装时可先将扩散板 3一侧面与该至少一个固定扩散板定位条 831接触， 然后移动其他的活动扩散板定位条 831即可实现扩散板 3的固定。
活动扩散板定位条 831的具体实施例方式是多样的， 例如， 活动扩散板 定位条 831两端可设置在滑轨内， 从而其可沿滑轨移动， 当移动到合适位置 再对其进行定位； 再如， 用于支撑活动扩散板定位条 831的框架上可有多个 定位孔， 活动扩散板定位条 831设在不同的定位孔中以移动到不同位置处； 在此对活动扩散板定位条 831的实施方式不再逐一详细描述。 应当理解， 以上 "扩散板定位条 831" 的形状是多样的， 例如其可为长 条形， 从而扩大与扩散板 3侧面的接触面积， 达到更好的固定效果； 或者扩 散板定位条 831也可为弯折的 "L" 形， 这样每个扩散板定位条 831可对扩 散板 3的两个侧面进行固定， 故总共只要两个扩散板定位条 831(例如一个固 定， 一个活动)即可固定扩散板 3的四个边， 结构简单， 容易实现。
在一个示例中，光学件定位单元还包括用于悬挂光学膜层 4的挂点 832。 由于光学膜层 4的材料与扩散板 3的材料热膨胀系数不同， 故二者通常 只是相邻设置但并不粘结在一起， 故这就需要对他们进行分别固定。 为了保 证光学膜层 4能起到最好的作用， 光学膜层 4最好能与扩散板 3出光面紧密 接触； 为此， 可在光学件定位单元中 (例如在扩散板定位条 831 上)设置挂点 832以悬挂光学膜层 4， 光学膜层 4上设置有挂耳， 挂耳穿过 832的区域。 这 是因为扩散板定位条 831本身就是用于固定扩散板 3的， 而在其上直接设置 挂点 832可易于确定扩散板 3与光学膜层 4间的位置关系。
本公开实施例的直下式背光模组测试装置还可以包括距离调节单元， 其 构造为用于调节发光件固定单元与光学件固定单元间的距离。
在直下式背光模组中， "混光距离" 是指光源构件 1(如 LED灯条)与扩 散板 3间的距离， 其通常在 15~40mm毫米之间， 混光距离是决定直下式背 光模组性能的一个重要参数， 故该距离的调整对直下式背光模组的性能测试 有重要的意义。 通过设置距离调节单元即可调整混光距离， 从而使本实施例 的直下式背光模组测试装置能测试同样部件在不同混光距离下的性能。
例如， 如图 3所示， 距离调节单元包括固定架 821和螺栓 822。 固定架 821 设置于所述发光件固定单元固定的所述发光件的出光路径之外， 且具有 螺母部分。 例如， 固定架 821设于发光件固定单元背侧 (即与发光件固定单元 出光侧相对的一侧)外； 螺栓包括螺栓头和带有螺纹的螺杆， 所述螺杆穿设在 所述固定架的所述螺母部分中， 所述螺栓头可转动的与所述发光件固定单元 (：如支撑板 811)连接。
因此， 如图 3所示， 当转动螺栓 822时， 螺栓 822即会相对固定架 821 在双向水平箭头方向移动，也由此带动支撑板 811在双向水平箭头方向移动， 也就是使装在支撑板 811上的反光罩 2和光源构件 1在双向水平箭头方向上 移动， 从而能够改变混光距离。 这种螺栓式的距离调节单元结构简单、 稳定， 且如果配合刻度即可获得 很高的调节精度。
应当理解， 距离调节单元也可为其他的实施形式； 例如， 支撑板 811可 设在滑轨上， 从而其可沿滑轨移动以调节混光距离； 在此不再对距离调节单 元的具体实施形式进行逐一描述。
检测头 85则设于光学件固定单元的出光侧夕卜，其构造为用于检测透过扩 散板 3和光学膜层 4的光。
在组装成背光模组后， 还需要对背光模组发出的光进行检测才能确定其 性能， 而这种检测即可通过检测头 85进行。
在一个示例中，检测头 85设于检测支架 86上，检测支架 86能带动检测 头 85在平行于扩散板 3的平面内移动，例如在图 3所示的双向竖直箭头方向 上移动。
也就是说，检测头 85可设置在一检测支架 86上，而检测支架 86可使检 测头 85移动， 从而对由不同位置发出的光进行测试； 例如， 检测支架 86可 为类似话筒架的形式。
若没有检测支架 86， 而釆用手持等方式固定检测头 85也是可行的。 在一个示例中， 本实施例的直下式背光模组测试装置还包括显示面板固 定单元，其用于将显示面板 5固定在光学件固定单元与检测头 85之间，从而 获得更真实的测试结果。
本实施例的直下式背光模组测试装置可将显示面板 5也固定住， 从而检 测头 85可检测经显示面板 5滤光后的光线，更好的确定背光模组与显示面板
5是否匹配。
例如， 显示面板固定单元包括： 多个用于与显示面板 5侧面接触的面板 定位条 841。 其中， 显示面板 5整体上为立方体结构， 其最大的两个相对的 主面为入光面和出光面， 而与入光面和出光面垂直的四个面为其 "侧面" 。 面板定位条 841包括： 至少一个能在平行于显示面板 5主面的平面内移动的 活动面板定位条 841。
也就是说， 显示面板固定单元可釆用与以上的扩散板 3固定单元类似的 定位条形式， 且面板定位条 841中也可有一部分是能活动的， 以适应不同尺 寸的显示面板 5。 其中， 如图 3所示， 面板定位条 841与扩散板定位条 831可以是连接为 一体的， 即一个定位条可同时起到固定显示面板 5和扩散板 3的作用， 以简 化装置的结构。
应当理解， 本实施例提供的直下式背光模组测试装置中还可包括一些未 示出于图 3的其他部件。
例如， 所述其他部件包括构造用于支撑以上所述的各定位条和支撑板 811的支撑结构 (如框架)； 同时，上述支撑结构例如也可通过一些连接件等连 在一起， 以使本实施例的直下式背光模组测试装置形成一个整体； 这些支撑 结构、 连接件等可釆取很多已知的形式。
再如， 如图 3所示， 支撑板 811的背侧 (远离反光罩 2的一侧)上还可伸 出多个插条***固定架 821上的孔中， 以保证支撑板 811运动的稳定性。
再如， 如图 3所示， 除了上述各定位条之外， 还可有挡住显示面板 5的 出光面边缘的卡条 89， 以防显示面板 5掉落。
需要说明的是， 所述显示面板可以为： 液晶显示面板、 电子纸等任何需 要背光模组的被动发光显示面板。
根据上述描述， 根据本公开的实施例至少可以提供以下结构：
( 1 )一种直下式背光模组测试装置， 其中， 所述直下式背光模组包括发 光件和光学件， 所述测试装置包括：
发光件固定单元， 构造为用于固定所述发光件；
光学件固定单元， 构造为用于将所述光学件固定在所述发光件的出光路 径上； 以及
检测头， 构造为用于检测自所述发光件发出且透过所述光学件的光。
( 2 )根据（1 )所述的直下式背光模组测试装置， 还包括：
显示面板固定单元， 构造为用于将显示面板固定在光学件固定单元固定 的所述光学件与检测头之间。
( 3 )根据（2 )所述的直下式背光模组测试装置， 其中， 所述显示面板 固定单元包括多个用于与显示面板侧面接触的面板定位条。
( 4 )根据（3 )所述的直下式背光模组测试装置， 其中， 所述面板定位 条中的至少一个为在平行于显示面板主面的平面内可移动的活动面板定位 条。 ( 5 )根据（ 1 )至（4 )中任意一项所述的直下式背光模组测试装置， 还 包括：
距离调节单元， 构造为用于调节发光件固定单元与光学件固定单元间的 距离。
( 6 )才艮据（5 )所述的直下式背光模组测试装置， 其中， 所述距离调节 单元包括：
固定架，设置于所述发光件固定单元固定的所述发光件的出光路径之外， 且具有螺母部分；
螺栓， 包括螺栓头和带有螺纹的螺杆， 所述螺杆穿设在所述固定架的所 述螺母部分中， 所述螺栓头可转动的与所述发光件固定单元连接。
( 7 )根据（ 1 )至（ 6 )中任意一项所述的直下式背光模组测试装置， 其 中， 所述发光件包括反光罩以及固定在反光罩上的光源构件， 所述发光件固 定单元包括：
用于与反光罩底部接触的支撑板；
卡块， 其可拆卸连接在所述支撑板上， 用于与反光罩侧面接触以固定反 光罩。
( 8 )根据（ 1至（ 7中任意一项所述的直下式背光模组测试装置， 其中， 所述光学件包括扩散板， 所述光学件固定单元包括多个用于与扩散板侧面接 触的扩散板定位条。
( 9 )根据（8所述的直下式背光模组测试装置， 其中， 所述扩散板定位 条中的至少一个为在平行于扩散板的主面的平面内可移动的活动扩散板定位 条。
( 10 )根据（ 1 )至（ 9中任一项所述的直下式背光模组测试装置， 其中， 所述光学件还包括光学膜， 所述光学件固定单元还包括用于悬挂所述光学膜 层的挂点。
( 11 )根据（ 1 )至（ 10 ) 中任意一项所述的直下式背光模组测试装置， 其中， 所述检测头设于检测支架上， 所述检测支架能带动所述检测头在平行 于扩散板的主面的平面内移动。
虽然上文中已经用一般性说明及具体实施方式， 对本公开作了详尽的描 述， 但在本公开基础上， 可以对之作一些修改或改进， 这对本领域技术人员 而言是显而易见的。 因此， 在不偏离本公开精神的基础上所做的这些修改或 改进， 均属于本公开要求保护的范围。
本申请要求于 2013年 12月 30日递交的中国专利申请第 201310746094.2 号的优先权， 在此全文引用上述中国专利申请公开的内容以作为本申请的一 部分。

Claims

权利要求书
1. 一种直下式背光模组测试装置， 其中， 所述直下式背光模组包括发光 件和光学件， 所述测试装置包括：
发光件固定单元， 构造为用于固定所述发光件；
光学件固定单元， 构造为用于将所述光学件固定在所述发光件的出光路 径上； 以及
检测头， 构造为用于检测自所述发光件发出且透过所述光学件的光。
2. 根据权利要求 1所述的直下式背光模组测试装置， 还包括：
显示面板固定单元， 构造为用于将显示面板固定在光学件固定单元固定 的所述光学件与检测头之间。
3. 根据权利要求 2所述的直下式背光模组测试装置， 其中， 所述显示面 板固定单元包括多个用于与显示面板侧面接触的面板定位条。
4. 根据权利要求 3所述的直下式背光模组测试装置， 其中， 所述面板定 条。 、 、 ' ' 口 、 - 、 一
5. 根据权利要求 1至 4中任意一项所述的直下式背光模组测试装置，还 包括：
距离调节单元， 构造为用于调节发光件固定单元与光学件固定单元间的 距离。
6. 根据权利要求 5所述的直下式背光模组测试装置， 其中， 所述距离调 节单元包括：
固定架，设置于所述发光件固定单元固定的所述发光件的出光路径之外， 且具有螺母部分；
螺栓， 包括螺栓头和带有螺纹的螺杆， 所述螺杆穿设在所述固定架的所 述螺母部分中， 所述螺栓头可转动的与所述发光件固定单元连接。
7. 根据权利要求 1至 6中任意一项所述的直下式背光模组测试装置，其 中， 所述发光件包括反光罩以及固定在反光罩上的光源构件， 所述发光件固 定单元包括：
用于与反光罩底部接触的支撑板； 卡块， 其可拆卸连接在所述支撑板上， 用于与反光罩侧面接触以固定反 光罩。
8. 根据权利要求 1至 7中任意一项所述的直下式背光模组测试装置，其 中， 所述光学件包括扩散板， 所述光学件固定单元包括多个用于与扩散板侧 面接触的扩散板定位条。
9. 根据权利要求 8所述的直下式背光模组测试装置， 其中， 所述扩散板 定位条中的至少一个为在平行于扩散板的主面的平面内可移动的活动扩散板 定位条。
10.根据权利要求 1至 9中任一项所述的直下式背光模组测试装置， 其 中， 所述光学件还包括光学膜， 所述光学件固定单元还包括用于悬挂所述光 学膜层的挂点。
11.根据权利要求 1至 10中任意一项所述的直下式背光模组测试装置， 其中， 所述检测头设于检测支架上， 所述检测支架能带动所述检测头在平行 于扩散板的主面的平面内移动。
PCT/CN2014/080911 2013-12-30 2014-06-27 直下式背光模组测试装置 WO2015100983A1 (zh)

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