WO2013149486A1 - 检测液晶面板的设备及方法 - Google Patents

检测液晶面板的设备及方法 Download PDF

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Publication number
WO2013149486A1
WO2013149486A1 PCT/CN2012/086972 CN2012086972W WO2013149486A1 WO 2013149486 A1 WO2013149486 A1 WO 2013149486A1 CN 2012086972 W CN2012086972 W CN 2012086972W WO 2013149486 A1 WO2013149486 A1 WO 2013149486A1
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Prior art keywords
transparent
liquid crystal
electrode layer
polarizer
transparent electrode
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PCT/CN2012/086972
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English (en)
French (fr)
Inventor
杨银勇
金楻
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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Priority to US14/122,120 priority Critical patent/US9470636B2/en
Publication of WO2013149486A1 publication Critical patent/WO2013149486A1/zh
Anticipated expiration legal-status Critical
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84Systems specially adapted for particular applications
    • G01N21/88Investigating the presence of flaws or contamination
    • G01N21/8806Specially adapted optical and illumination features
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements

Definitions

  • Embodiments of the present invention relate to an apparatus and method for detecting a liquid crystal panel. Background technique
  • the liquid crystal panel mainly comprises a color filter substrate of a pair of boxes, a thin film field effect transistor (TFT) array substrate, and a liquid crystal layer between the color film substrate and the TFT array substrate.
  • TFT thin film field effect transistor
  • the Q-panel substrate this is mainly detected by optical detection, that is, a polarizer is separately added to the upper and lower sides of the Q-panel substrate, and a voltage is applied to the pixel electrode of the substrate to make the TFT substrate and the color film in the Q-panel substrate.
  • An electric field is generated between the substrates, so that the liquid crystal molecules are deflected by the electric field.
  • the current Fringe Field Switching (FFS) type Q-panel (1/4 panel) substrate has no reserved electrode sides, so it cannot be like a twisted nematic with electrode edges.
  • the electrical signal is applied by the electrode during the forming process, and the electrical test (ET) can only be performed after the second cutting of the mother board.
  • Such detection methods are highly limited, increasing the risk of production of FFS type Q-panel substrates, which may cause significant losses. Summary of the invention
  • Embodiments of the present invention provide an apparatus and method for detecting a liquid crystal panel, which are capable of detecting a load electric signal on a liquid crystal panel such as an FFS type liquid crystal panel, thereby improving the yield.
  • An aspect of the present invention provides an apparatus for detecting a liquid crystal panel, comprising: a transparent stage for carrying a liquid crystal panel to be tested; a first polarizer located above the transparent stage; and a second polarizer located at the The backlight is located under the second polarizer, and the light emitted by the backlight passes through the second polarizer and the transparent carrier reaches the first polarizer; a clear electrode layer, located above the transparent stage; a second transparent electrode layer, located under the transparent stage; a signal loading unit electrically connected to the first transparent electrode layer and the second transparent electrode layer, The first transparent electrode layer and the second transparent electrode layer are loaded with an electrical signal such that the first transparent electrode layer and the second transparent electrode layer have a liquid crystal panel to be tested on the transparent stage.
  • the electric field deflected by the liquid crystal molecules comprising: a transparent stage for carrying a liquid crystal panel to be tested; a first polarizer located above the transparent stage; and a second polarizer located at the The backlight is located under the second polarizer
  • Another aspect of the present invention provides a method of detecting a liquid crystal panel, wherein a first polarizer is disposed above the transparent stage, and a second polarizer is disposed under the transparent stage, and the second polarizer is disposed on the second polarizer a backlight is disposed under the transparent stage, a first transparent electrode layer is disposed above the transparent stage, a second transparent electrode layer is disposed under the transparent stage, and a signal loading unit and the first transparent electrode layer are disposed The second transparent electrode layer is connected to the transparent electrode stage; the liquid crystal panel to be tested is carried on the transparent substrate; and the first transparent electrode layer and the second transparent electrode layer are loaded with electrical signals by the signal loading unit.
  • An electric field for deflecting liquid crystal molecules is formed between the first transparent electrode layer and the second transparent electrode layer; the light of the backlight is transmitted through the second polarizer, the transparent stage, and reaches The first polarizer; detecting the liquid crystal panel by light reaching the first polarizer.
  • the device and method for detecting a liquid crystal panel provided by the embodiment of the present invention, for example, when detecting an FFS type liquid crystal panel, forming a planar electric field above and below the liquid crystal to deflect liquid crystal molecules in the liquid crystal so that light emitted by the backlight can pass through the liquid crystal Thereby, the detection of the liquid crystal panel is realized, and the yield rate is improved.
  • FIG. 1 is a schematic structural diagram of a detecting device according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a detecting apparatus according to another embodiment of the present invention. detailed description
  • An apparatus for detecting a liquid crystal panel includes: a transparent stage 101 for carrying a liquid crystal panel 100 to be tested; a first polarizer 102, located above the transparent stage 101; The second polarizer 103 is located below the transparent stage 101; and the backlight 104 is located below the second polarizer 103.
  • the light emitted by the backlight 104 passes through the second polarizer 103 and the transparent stage 101 to reach the first polarizer 102.
  • the device further includes: a first transparent electrode layer 105 above the transparent stage 101; a second transparent electrode layer 106 under the transparent stage 101; a signal loading unit 109, and a first transparent electrode layer 105 and a second transparent electrode
  • the layer 106 is electrically connected to load the first transparent electrode layer 105 and the second transparent electrode layer 106 with electrical signals such that the first transparent electrode layer 105 and the second transparent electrode layer 106 are disposed on the transparent stage 101.
  • the electric field of the liquid crystal molecules of the liquid crystal panel 100 to be tested is deflected.
  • the first polarizer 102 and the second polarizer 103 are disposed on the upper and lower sides of the liquid crystal panel 100 to be tested.
  • the liquid crystal molecules are aligned parallel to the substrate, and the first polarizer 102 and the absorption axis of the second polarizer 103 are arranged at 90 degrees.
  • the absorption axis of the second polarizer 103 is the same as the alignment of the liquid crystal molecules, and the incident light passes through the parallel alignment liquid crystal layer, linearly advances without changing the polarization direction, and cannot pass through the first polarizer, so the black state of the light-emitting side is opaque; Applying an electric field In the latter case, the liquid crystal molecules are twisted, and the liquid crystal layer is birefringent. Therefore, after passing through the liquid crystal layer, the polarization direction of the incident light is changed, so that the first polarizer can pass through, and the light-emitting side can be in a light-transmitting state.
  • the first transparent electrode layer 105 may be a transparent conductive film coated on the first polarizer 102, such as nano indium tin oxide (Indium Tin).
  • the Oxides, ITO film is provided with a signal contact 1021 on the first polarizer 102.
  • the second transparent electrode layer 106 may be a transparent conductive film coated on the second polarizer 103, such as a germanium film, and the second polarizer 103 is provided with a signal contact 1031. Since the ruthenium film has transparent conductivity, the ruthenium film is coated on the polarizer without affecting the operation of the polarizer.
  • the FFS type liquid crystal panel 100 to be tested without the electrode side is placed on the transparent stage 101; the backlight 104 is turned on; the signal contact 1021 on the first polarizer 102 and the signal contact 1031 of the second polarizer 103 are turned on.
  • the electric signal is loaded such that a planar electric field is generated between the first transparent electrode layer 105 on the first polarizer 102 and the second transparent electrode layer 106 on the second polarizer 103, and the electric field causes the liquid crystal of the liquid crystal panel 100 located therein to occur. deflection.
  • the light emitted by the backlight 104 can pass through the liquid crystal panel 100, thereby visually detecting the possible defects of the product, and enhancing the quality management of the FFS type product.
  • the first transparent electrode layer may be a first transparent glass substrate 107 coated with a transparent conductive film such as a tantalum film.
  • the first transparent glass 107 may be located between the transparent stage 101 and the first polarizer 102, and the area of the first transparent glass substrate 107 may be greater than or equal to the area of the liquid crystal panel 100 to be tested.
  • a signal contact 1071 is provided on the first transparent glass substrate 107.
  • the second transparent electrode layer may be a second transparent glass substrate 108 coated with a transparent conductive film such as a tantalum film.
  • the second transparent glass 108 may be located between the transparent stage 101 and the second polarizer 103, and the area of the second transparent glass substrate 108 may be greater than or equal to the area of the liquid crystal panel 100 to be tested.
  • a signal contact 1081 is provided on the second transparent glass substrate 108.
  • the FFS type liquid crystal panel 100 to be tested without the electrode side is placed on the transparent stage 101; the backlight 104 is turned on; the signal contacts 1071 and the first transparent glass substrate 107 are The signal contact 1081 of the second transparent glass substrate 108 is loaded with an electric signal such that a planar electric field is generated between the first transparent glass substrate 107 and the second transparent glass substrate 108, and the liquid crystal of the liquid crystal panel 100 located therein is deflected.
  • the light emitted by the backlight 104 can pass through the liquid crystal
  • the panel 100 in turn, can detect the possible defects of the product through visual inspection, and strengthens the quality management of the FFS type product.
  • the use of a transparent glass substrate coated with an ITO film as an electrode layer does not affect the fabrication of the polarizer, and does not complicate the fabrication process of the polarizer, and does not affect the optical effect of the polarizer. Moreover, the production of a transparent glass substrate as an electrode layer is extremely simple. In the detection process, it is only necessary to add a transparent glass substrate directly provided with an ITO film having a load signal to the original detecting device, which makes the detection cost lower.
  • the transparent glass substrate having the conductive film may be another transparent substrate which is electrically conductive, preferably a thin transparent substrate.
  • Another embodiment of the present invention provides a method for detecting a liquid crystal panel. Above the transparent stage, a first polarizer is disposed, and a second polarizer is disposed under the transparent stage, and the second polarizer is disposed. a backlight is disposed under the sheet, a first transparent electrode layer is disposed above the transparent stage, a second transparent electrode layer is disposed under the transparent stage, and a signal loading unit and the first transparent electrode layer are disposed And connecting the second transparent electrode layer; the detecting method comprises the following steps.
  • the liquid crystal panel to be tested is carried on the transparent stage.
  • a voltage may be applied to the first transparent electrode layer and the second transparent electrode layer by the signal loading unit, so that a voltage difference of, for example, about 3V to 8V is formed between the first transparent electrode layer and the second transparent electrode layer. Then, an electric field for deflecting the liquid crystal molecules is formed between the first transparent electrode layer and the second transparent electrode layer, so that the liquid crystal is deflected and aligned by the electric field, so that the light can pass.
  • the light of the backlight is transmitted through the second polarizer and the transparent stage to reach the first polarizer.
  • the polarized light filtered by the first polarizer is parallel to the vibration direction of the polarized light filtered by the second polarizer.
  • the light can pass through the second polarizer and then pass through the The transparent stage is reached to reach the first polarizer.
  • the direction of polarization of the liquid crystal is different, and the polarization state of the light reaching the first polarizer is different. If the pixels of the LCD panel are defective, this is not Good may affect the pixel aperture ratio.
  • the transmitted light will be more or less than the normal light, and the difference in display light intensity will appear. Therefore, it is possible to judge whether or not the defect is based on the difference in brightness and darkness of the received light.
  • the method for detecting a liquid crystal panel introduces a planar electric field on the device.
  • an electric signal is loaded on the liquid crystal panel to form a planar electric field, and the liquid crystal molecules in the liquid crystal panel are deflected.
  • the light emitted by the backlight can pass through the liquid crystal, thereby realizing the detection of the liquid crystal panel and improving the yield.

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  • Nonlinear Science (AREA)
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  • Optics & Photonics (AREA)
  • Crystallography & Structural Chemistry (AREA)
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Abstract

一种检测液晶面板(100)的设备及方法,能够对FFS型液晶面板(100)进行加载电信号的检测,提高了良品率。该设备包括:透明载台(101)、第一偏光片(102)、第二偏光片(103)和背光源(104),还包括:第一透明电极层(105),位于所述透明载台(101)上方;第二透明电极层(106),位于所述透明载台(101)下方;信号加载单元(109),与所述第一透明电极层(105)、第二透明电极层(106)电连接,用于向所述第一透明电极层(105)、第二透明电极层(106)加载电信号,以使所述第一透明电极层(105)和所述第二透明电极层(106)之间具有使所述透明载台(101)上的待测液晶面板(100)的液晶分子偏转的电场。

Description

检测液晶面板的设备及方法 技术领域
本发明的实施例涉及一种检测液晶面板的设备及方法。 背景技术
液晶面板主要包括对盒的彩膜基板、 薄膜场效应晶体管 (Thin Film Transistor, TFT )阵列基板以及位于所述彩膜基板和所述 TFT阵列基板之间 的液晶层。在液晶面板的生产过程中,为了及早发现液晶面板中的质量问题, 需要对制造过程中的 Q-panel ( 1/4面板)基板进行检测。 对于 Q-panel基板, 这主要利用光学检测法进行检测, 即对于 Q-panel基板上下分别添加偏光片, 并在该基板的像素电极上加载电压, 使得 Q-panel基板中的 TFT基板与彩膜 基板之间产生电场, 从而液晶分子在该电场的作用下发生偏转。 当有背光源 发出的光射入到液晶面板中时, 检测人员就能够看到通过 Q-panel基板的光 线, 进而对基板进行检测。
但是, 由于设计上的缺陷, 目前的边缘电场驱动( Fringe Field Switching, FFS )型的 Q-panel ( 1/4面板)基板没有预留电极边, 所以不能像留有电极 边的扭曲向列 (Twisted Nematic, TN )型 Q-panel基板那样, 在成盒工序段 利用电极边加载电信号进行检测, 只能在对母板进行第 2次切割之后进行电 学测试(Electrical Test, ET )检测。 这样的检测方法局限性大, 增加了 FFS 型 Q-panel基板的生产的风险, 有可能造成重大的损失。 发明内容
本发明的实施例提供一种检测液晶面板的设备及方法, 能够对例如 FFS 型液晶面板的液晶面板进行加载电信号的检测, 提高了良品率。
本发明的一个方面提供了一种检测液晶面板的设备,其包括:透明载台, 用于承载待测液晶面板; 第一偏光片,位于所述透明载台上方; 第二偏光片, 位于所述透明载台下方; 背光源, 位于所述第二偏光片下方, 所述背光源发 出的光线穿过所述第二偏光片、 所述透明载台到达所述第一偏光片; 第一透 明电极层, 位于所述透明载台上方; 第二透明电极层, 位于所述透明载台下 方; 信号加载单元, 与所述第一透明电极层、 第二透明电极层电连接, 用于 向所述第一透明电极层、 第二透明电极层加载电信号, 以使所述第一透明电 极层和所述第二透明电极层之间具有使所述透明载台上的待测液晶面板的液 晶分子偏转的电场。
本发明的另一个方面提供了一种检测液晶面板的方法,在透明载台上方, 设有第一偏光片, 在所述透明载台下方设有第二偏光片, 在所述第二偏光片 下方设有背光源, 在所述透明载台上方设有第一透明电极层, 在所述透明载 台下方设有第二透明电极层, 并且, 设置信号加载单元与所述第一透明电极 层、 第二透明电极层连接; 该检测方法包括: 在所述透明载物台上承载待测 液晶面板; 通过所述信号加载单元向所述第一透明电极层、 第二透明电极层 加载电信号, 以使得所述第一透明电极层和所述第二透明电极层之间形成使 液晶分子发生偏转的电场; 将所述背光源的光线透过第二偏光片、 所述透明 载台, 到达所述第一偏光片; 通过到达所述第一偏光片的光线对所述液晶面 板进行检测。
本发明实施例提供的检测液晶面板的设备及方法, 例如在对 FFS型液晶 面板进行检测时, 在液晶上下形成平面电场, 使液晶中的液晶分子偏转, 以 使得背光源发出的光可以通过液晶, 从而实现了对液晶面板的检测, 提高了 良品率。 附图说明
为了更清楚地说明本发明实施例的技术方案, 下面将对实施例的附图作 简单地介绍,显而易见地,下面描述中的附图仅仅涉及本发明的一些实施例, 而非对本发明的限制。
图 1为本发明实施例提供的检测设备的结构示意图;
图 2为本发明另一实施例提供的检测设备的结构示意图。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚, 下面将结合本发 明实施例的附图,对本发明实施例的技术方案进行清楚、 完整地描述。显然, 所描述的实施例是本发明的一部分实施例, 而不是全部的实施例。 基于所描 述的本发明的实施例, 本领域普通技术人员在无需创造性劳动的前提下所获 得的所有其他实施例, 都属于本发明保护的范围。
除非另作定义, 此处使用的技术术语或者科学术语应当为本发明所属领 域内具有一般技能的人士所理解的通常意义。 本发明专利申请说明书以及权 利要求书中使用的 "第一" 、 "第二" 以及类似的词语并不表示任何顺序、 数量或者重要性,而只是用来区分不同的组成部分。同样, "一个 "或者 "一" 等类似词语也不表示数量限制, 而是表示存在至少一个。 "包括" 或者 "包 含" 等类似的词语意指出现在 "包括" 或者 "包含" 前面的元件或者物件涵 盖出现在 "包括" 或者 "包含" 后面列举的元件或者物件及其等同, 并不排 除其他元件或者物件。 "连接" 或者 "相连" 等类似的词语并非限定于物理 的或者机械的连接, 而是可以包括电性的连接, 不管是直接的还是间接的。 "上" 、 "下" 、 "左" 、 "右" 等仅用于表示相对位置关系, 当被描述对 象的绝对位置改变后, 则该相对位置关系也可能相应地改变。
本发明的一个实施例提供的检测液晶面板的设备, 如图 1所示, 包括: 透明载台 101 , 用于承载待测液晶面板 100; 第一偏光片 102, 位于该透明载 台 101上方; 第二偏光片 103 , 位于该透明载台 101下方; 背光源 104, 位于 第二偏光片 103下方。 在工作时, 该背光源 104发出的光线向上穿过第二偏 光片 103、 透明载台 101到达第一偏光片 102。
该设备还包括: 第一透明电极层 105, 位于透明载台 101上方; 第二透 明电极层 106,位于透明载台 101下方; 信号加载单元 109, 与第一透明电极 层 105、第二透明电极层 106电连接, 用于向第一透明电极层 105、 第二透明 电极层 106加载电信号, 以使该第一透明电极层 105和第二透明电极层 106 之间具有使透明载台 101上的待测液晶面板 100的液晶分子偏转的电场。
在本实施例中, 所述第一偏光片 102和所述第二偏光片 103分设于所述 待测液晶面板 100的上下两侧。 示例性的, 在检测 FFS型液晶面板时, 在液 晶面板未施加电场的情况下, 液晶分子是平行于基板配向, 第一偏光片 102 与第二偏光片 103的吸收轴 90度交叉配置。第二偏光片 103的吸收轴与液晶 分子的配向相同,入射光经由平行配向的液晶层,直线前进不改变偏振方向, 无法通过第一偏光片, 所以对于出光侧呈现不透光的黑色状态; 在施加电场 后的情况下, 液晶分子会扭转, 液晶层产生双折射现象, 所以在通过该液晶 层之后, 入射光偏振方向改变, 从而可以通过第一偏光片, 对于出光侧呈现 透光状态。
在图 1所示的本实施例中, 示例性的, 该第一透明电极层 105可以为涂 覆在第一偏光片 102上的一层透明导电膜, 如纳米铟锡金属氧化物 (Indium Tin Oxides, ITO )薄膜, 同时该第一偏光片 102上设有信号接点 1021。 第二 透明电极层 106可以为涂覆在第二偏光片 103上的一层透明导电膜, 如 ΙΤΟ 薄膜, 同时第二偏光片 103上设有信号接点 1031。 由于 ΙΤΟ薄膜具有透明导 电性, 所以将 ΙΤΟ薄膜涂覆在偏光片上后, 不会影响偏光片的工作。
检测时, 将没有电极边的待测的 FFS型液晶面板 100置于透明载台 101 上;开启背光源 104;向第一偏光片 102上的信号接点 1021和第二偏光片 103 的信号接点 1031加载电信号,使得第一偏光片 102上的第一透明电极层 105 和第二偏光片 103上的第二透明电极层 106之间产生平面电场, 该电场使位 于其中的液晶面板 100的液晶发生偏转。 这样, 背光源 104发出的光可以通 过液晶面板 100, 进而可以通过目视检测来发现产品可能存在的不良, 加强 了对 FFS型产品的质量管理。
优选的, 在本发明另一实施例中, 如图 2所示, 该第一透明电极层可以 为涂覆有透明导电膜(如 ΙΤΟ薄膜) 的第一透明玻璃基板 107。 该第一透明 玻璃 107可以位于透明载台 101与第一偏光片 102之间, 且该第一透明玻璃 基板 107的面积可以大于或等于待测液晶面板 100的面积。 第一透明玻璃基 板 107上设有信号接点 1071。 第二透明电极层可以为涂覆有透明导电膜(如 ΙΤΟ薄膜) 的第二透明玻璃基板 108。 该第二透明玻璃 108可以位于透明载 台 101与第二偏光片 103之间, 且该第二透明玻璃基板 108的面积可以大于 或等于待测液晶面板 100 的面积。 第二透明玻璃基板 108 上设有信号接点 1081。
与上一实施例类似,检测时,将没有电极边的待测的 FFS型液晶面板 100 置于透明载台 101上; 开启背光源 104; 向第一透明玻璃基板 107上的信号 接点 1071和第二透明玻璃基板 108的信号接点 1081加载电信号, 使得第一 透明玻璃基板 107和第二透明玻璃基板 108之间产生平面电场, 使位于其中 的液晶面板 100的液晶发生偏转。 这样, 背光源 104发出的光可以通过液晶 面板 100,进而可以通过目视检测来发现产品可能存在的不良,加强了对 FFS 型产品的质量管理。
需要说明的是, 利用涂覆 ITO薄膜的透明玻璃基板作为电极层, 不会影 响偏光片制作, 不会使偏光片的制作过程变得复杂, 同时也不会影响偏光片 的光学效应。 而且, 作为电极层的透明玻璃基板制作极为简单。 在检测过程 中, 只需将直接将设置有加载信号的 ITO薄膜的透明玻璃基板添加到原有的 检测设备中, 这使得检测成本降低。 在本发明实施例中, 具有导电薄膜的透 明玻璃基板也可以是其他自身可以导电的透明基板, 优选, 薄的透明基板。
本发明的另一个实施例提供了一种检测液晶面板的方法, 在透明载台上 方, 设有第一偏光片, 在所述透明载台下方设有第二偏光片, 在所述第二偏 光片下方设有背光源, 在所述透明载台上方设有第一透明电极层, 在所述透 明载台下方设有第二透明电极层, 并且设置信号加载单元与所述第一透明电 极层、 第二透明电极层连接; 该检测方法包括如下步骤。
S301、 在所述透明载物台上承载待测液晶面板。
S302、 通过所述信号加载单元向所述第一透明电极层、 第二透明电极层 加载电信号, 以使得所述第一透明电极层和所述第二透明电极层之间形成使 液晶分子发生偏转的电场。
例如, 可以通过所述信号加载单元向所述第一透明电极层、 第二透明电 极层加载电压, 使得第一透明电极层和第二透明电极层之间形成例如 3V ~ 8V左右的电压差,则所述第一透明电极层和所述第二透明电极层之间形成使 液晶分子发生偏转的电场, 进而使得液晶在该电场的作用下发生偏转整齐排 歹 |J , 从而可以使光线通过。
5303、 将所述背光源的光线透过第二偏光片、 所述透明载台, 到达所述 第一偏光片。
第一偏光片滤出的偏振光与第二偏光片滤出的偏振光的振动方向平行, 当液晶分子在电场的作用下发生偏转整齐排列时, 光线能够通过第二偏光片 后, 再通过所述透明载台, 到达所述第一偏光片。
5304、 通过到达所述第一偏光片的光线对所述液晶面板进行检测。
当背光源的光线到达所述第一偏光片时, 液晶偏转方向的不同, 则到达 第一偏光片的光的偏振状态也就不同。 如果液晶面板的像素存在不良, 该不 良可能影响像素开口率, 背光源发出的光线在通过该不良像素时, 透过的光 线会比正常的光线要多或少, 出现显示光强的差异。 因此, 可以根据所接收 到光的亮暗不同来判断是否不良。
本发明实施例提供的检测液晶面板的方法, 在该设备上引入平面电场, 对 FFS型液晶面板进行检测时, 在液晶面板上下加载电信号形成平面电场, 使液晶面板中的液晶分子偏转, 以使得背光源发出的光可以通过液晶, 从而 实现了对液晶面板的检测, 提高了良品率。
以上所述仅是本发明的示范性实施方式, 而非用于限制本发明的保护范 围, 本发明的保护范围由所附的权利要求确定。

Claims

权利要求书
1、 一种检测液晶面板的设备, 包括:
透明载台, 用于承载待测液晶面板;
第一偏光片, 位于所述透明载台上方;
第二偏光片, 位于所述透明载台下方;
背光源, 位于所述第二偏光片下方, 所述背光源发出的光线可穿过所述 第二偏光片、 所述透明载台到达所述第一偏光片;
第一透明电极层, 位于所述透明载台上方;
第二透明电极层, 位于所述透明载台下方;
信号加载单元, 与所述第一透明电极层、 第二透明电极层电连接, 用于 向所述第一透明电极层、 第二透明电极层加载电信号, 以使所述第一透明电 极层和所述第二透明电极层之间具有使所述透明载台上的待测液晶面板的液 晶分子偏转的电场。
2、根据权利要求 1所述的检测液晶面板的设备, 其中, 所述第一偏光片 和所述第二偏光片分设于所述待测液晶面板的上下两侧, 第一偏光片与第二 偏光片的吸收轴是 90度交叉配置。
3、根据权利要求 1或 2所述的检测液晶面板的设备, 其中, 所述第一透 明电极层为涂覆在所述第一偏光片上的透明导电膜; 所述第一偏光片上设有 信号接点。
4、 根据权利要求 1-3任一所述的检测液晶面板的设备, 其中, 所述第二 透明电极层为涂覆在所述第二偏光片上的透明导电膜; 所述第二偏光片上设 有信号接点。
5、 根据权利要求 1-3任一所述的检测液晶面板的设备, 其中, 所述第一 透明电极层为涂覆有透明导电膜的第一透明玻璃基板; 所述第一透明玻璃基 板的面积大于或等于所述待测液晶面板的面积; 所述第一透明玻璃基板上设 有信号接点。
6、根据权利要求 5所述的检测液晶面板的设备, 其中, 所述第一透明玻 璃基板位于所述透明载台与所述第一偏光片之间。
7、 根据权利要求 1-3和 5任一所述的检测液晶面板的设备, 其中, 所述 第二透明电极层为涂覆有透明导电膜的第二透明玻璃基板; 所述第二透明玻 璃基板的面积大于或等于所述待测液晶面板的面积; 所述第二透明玻璃基板 上设有信号接点。
8、根据权利要求 7所述的检测液晶面板的设备, 其中, 所述第二透明玻 璃基板位于所述透明载台与所述第二偏光片之间。
9、 一种检测液晶面板的方法, 其中在透明载台上方, 设有第一偏光片, 在所述透明载台下方设有第二偏光片, 在所述第二偏光片下方设有背光源, 在所述透明载台上方设有第一透明电极层, 在所述透明载台下方设有第二透 明电极层, 并且, 设置信号加载单元与所述第一透明电极层、 第二透明电极 层连接;
该检测方法包括:
在所述透明载物台上承载待测液晶面板;
通过所述信号加载单元向所述第一透明电极层、 第二透明电极层加载电 信号, 以使得所述第一透明电极层和所述第二透明电极层之间形成使液晶分 子发生偏转的电场;
将所述背光源的光线透过第二偏光片、 所述透明载台, 到达所述第一偏 光片;
通过到达所述第一偏光片的光线对所述液晶面板进行检测。
PCT/CN2012/086972 2012-04-06 2012-12-20 检测液晶面板的设备及方法 Ceased WO2013149486A1 (zh)

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