WO2014000354A1 - 液晶显示面板检测装置 - Google Patents

液晶显示面板检测装置 Download PDF

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Publication number
WO2014000354A1
WO2014000354A1 PCT/CN2012/083712 CN2012083712W WO2014000354A1 WO 2014000354 A1 WO2014000354 A1 WO 2014000354A1 CN 2012083712 W CN2012083712 W CN 2012083712W WO 2014000354 A1 WO2014000354 A1 WO 2014000354A1
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WIPO (PCT)
Prior art keywords
substrate
liquid crystal
film layer
crystal display
metal film
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Ceased
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PCT/CN2012/083712
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English (en)
French (fr)
Inventor
郭栋
金用燮
张钟石
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BOE Technology Group Co Ltd
Hefei BOE Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Hefei BOE Optoelectronics Technology Co Ltd
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Publication of WO2014000354A1 publication Critical patent/WO2014000354A1/zh
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    • 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
    • G02F1/1306Details
    • G02F1/1309Repairing; Testing

Definitions

  • Liquid crystal display panel detecting device Liquid crystal display panel detecting device
  • Embodiments of the present invention relate to a liquid crystal display panel detecting device. Background technique
  • the occurrence of a defective liquid crystal display device is unavoidable.
  • the defects are mainly divided into two major categories: poor optical and poor electrical.
  • Factors that cause optical defects include: liquid crystals, metal electrodes, insulating layers, alignment layers, and sealant, and any of the above factors can cause optical defects such as horizontal black lines, white lines, and black spots.
  • the factors that cause electrical failure are mainly various defects in the array process, such as short circuit of the circuit line, open circuit or the presence of stain particles.
  • the defects of the liquid crystal display panel can detect corresponding adverse phenomena through the optical detecting device and the electrical detecting device. For example, it is detected by the optical detecting device whether the liquid crystal has a defect or whether the TFT is damaged by the electrical detecting device.
  • the method for detecting whether the liquid crystal display panel has optical defects is that, by optical alignment, the probe corresponding to the data line and the probe corresponding to the scan line are respectively accurately contacted with the signal input port of the liquid crystal display panel, and the liquid crystal is given to the liquid crystal display panel.
  • the screen is displayed, and then it is detected whether there is a defect on the liquid crystal display panel.
  • the existing defect detecting equipment can only be measured after the cutting process of a large glass substrate for each panel obtained after the cutting process, and the following defects exist.
  • the feedback time is longer. Only after a large number of glass substrates including a plurality of panels are produced, and each of the glass substrates is cut to obtain a liquid crystal display panel can measure the defects of the panel, so that it is impossible to measure all the panels on one glass substrate at the same time. . When a defect exists in all the panels on a glass substrate, the poor test panel obviously brings a large workload. Moreover, it is impossible to detect the defects of the panel before the cutting process, which may result in the rejection rate of the product. Higher.
  • the detected defects cannot be judged to be electrical or optical. In the process of bad analysis, if it can be accurately identified that the defect is poor or poor, it can help the engineer to locate the cause of the defect more quickly.
  • the working accuracy of the testing equipment is very high.
  • the position of the detecting device is adjusted so that the detecting probe of the detecting device corresponds to the position of the new input end of the display panel, and the movement of the device needs to be accurate to lum.
  • testing equipment must use hardware such as printed circuit boards, low voltage differential signal lines, signal generators, and probe units.
  • Embodiments of the present invention provide a liquid crystal display panel detecting device for efficiently detecting a defective phenomenon of a panel in time.
  • An aspect of the invention provides a liquid crystal display panel detecting device, comprising: a base; a first transparent substrate disposed on the base and disposed perpendicular to the base; and a second substrate disposed on the base and perpendicular to the base Positioning in parallel with the first transparent substrate, wherein a vertical distance between the first transparent substrate and the second substrate is not less than a thickness of the liquid crystal display panel to be detected; a first transparent metal film layer is formed in the a first transparent substrate; a second metal film layer formed on the second substrate; a signal generator for supplying a voltage signal to the first transparent metal film layer and the second metal film layer, and the first transparent metal film The layer and the second metal film layer are electrically connected; the backlight provides backlight for the liquid crystal display panel to be detected.
  • An embodiment of the present invention places a to-be-detected object (a glass substrate including a plurality of liquid crystal display panels) between the first transparent substrate and the second substrate, and the signal generator is located on the first transparent substrate.
  • Applying a voltage signal to a transparent metal film layer and a second metal film layer on the second substrate No. and providing a light source for the liquid crystal display panel through the backlight, realizing display of different gray scale images, and testing the bad phenomenon of the liquid crystal display panel before cutting.
  • FIG. 1 is a side view showing a structure of a liquid crystal display panel detecting device according to an embodiment of the present invention
  • FIG. 2 is a front view showing a structure of a liquid crystal display panel detecting device according to an embodiment of the present invention
  • FIG. 3 is another liquid crystal display according to an embodiment of the present invention. Side view of the structure of the panel detecting device;
  • FIG. 4 is a front elevational view showing the structure of another liquid crystal display panel detecting device according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a defective shape and a region on a liquid crystal display panel according to an embodiment of the present invention. detailed description
  • Embodiments of the present invention provide a liquid crystal display panel detecting device for quickly detecting a defect of each liquid crystal display panel on a glass substrate before cutting.
  • the liquid crystal display panel (referred to as a panel) mentioned in this specification is a single panel obtained by cutting a single substrate (for example, a glass substrate), and each panel is correspondingly used for one liquid crystal display device.
  • a single substrate can be used to simultaneously fabricate a plurality of liquid crystal display panels of a certain size.
  • the substrate including the plurality of liquid crystal display panels is cut to obtain a plurality of independent liquid crystal display panels.
  • the manufacturing process of the liquid crystal display panel is an array process, a color film process, a liquid crystal cell process, and a module process.
  • the array process, the color film process, and the liquid crystal cell process are all performed on a single piece of, for example, a glass substrate, i.e., before the glass substrate is cut.
  • the module process is performed on the unit panel after the glass substrate is cut.
  • a glass substrate may be more than one meter in length and width and can be cut into multiple panels.
  • the manufacturing process of the liquid crystal display device there are about 300 processes, and each process may cause a malfunction of the liquid crystal display panel. Therefore, it is very important for the mass production mode of the product to detect the defects of the liquid crystal panel in each process in time and solve it as soon as possible. If problems occur in a certain process and are not discovered in time, the irreparable damage is enormous.
  • Embodiments of the present invention are directed to certain defects, such as after a liquid crystal cell process, such as defects in liquid crystal quality problems caused by a panel or defects caused by TFT damage, etc., before the glass substrate is not subjected to a cutting process, using a liquid crystal display panel detecting device Poor detection of the panel on a whole piece of glass substrate, timely detection of the occurrence of defects, and timely solution.
  • FIG. 1 is a schematic side view of a liquid crystal display panel detecting apparatus according to an embodiment of the present invention.
  • a first transparent substrate 2 located on the base 1 and placed perpendicular to the base 1;
  • the second substrate 3 is located on the base 1 and placed perpendicular to the base 1.
  • the second substrate 3 is placed in parallel with the first transparent substrate 2, and the vertical distance between the first transparent substrate 2 and the second substrate 3 is not less than Detecting the thickness of the liquid crystal display panel;
  • a first transparent metal film layer 4 is formed on the first transparent substrate 2;
  • a second metal film layer 5 is formed on the second substrate 3;
  • the signal generator 6 supplies a voltage signal to the first transparent metal film layer 4 and the second metal film layer 5, Electrically connecting with the first transparent metal film layer 4 and the second metal film layer 5;
  • the backlight 7 provides backlighting for the detected liquid crystal display panel.
  • the first transparent metal film layer 4 may be formed on either side of the first transparent substrate 2; and, the second metal film layer 5 may be formed on either side of the second substrate 3.
  • the first transparent metal film layer 4 is formed on the first transparent substrate 2 at a distance from the second substrate 3.
  • the second metal film layer 5 is formed on the second substrate 3 on a side far from the first transparent substrate 2.
  • the second substrate 3 may be transparent or opaque.
  • the second metal film layer 5 may be transparent or opaque.
  • the area of the first transparent substrate 2 and the second substrate 3 is not less than the area of the liquid crystal display panel to be detected to ensure that the detected liquid crystal display panel is detected during one detection.
  • FIG. 2 is a front elevational view of a liquid crystal display panel detecting apparatus according to an embodiment of the present invention.
  • the object to be detected (the glass substrate including the plurality of liquid crystal display panels) is placed between the first transparent substrate and the second substrate, and the signal generator is the first on the first transparent substrate.
  • the transparent metal film layer and the second metal film layer on the second substrate apply an electrical signal, and the light source provided by the backlight realizes display of different gray scale images, and tests the poor phenomenon of the liquid crystal display panel before cutting. This can improve the efficiency of detecting the failure of the liquid crystal display panel.
  • the signal generator 6 may be located on the base, and the backlight 7 may also be located on the base.
  • the signal generator 6 or backlight 7 can also be a separate device from the base.
  • the backlight 7 is a backlight of adjustable brightness.
  • the liquid crystal display panel detecting apparatus may further include:
  • the first polarizer 8 is formed on the first transparent metal film layer 4;
  • the second polarizer 9, is formed on the second metal film layer 5.
  • the first transparent substrate 2 and/or the second substrate 3 may be a glass substrate, and the liquid crystal display between the first transparent substrate 2 and the second substrate 3 is observed to be transparent to the first transparent substrate 2 or the second substrate 3.
  • the display of the panel may be a glass substrate, and the liquid crystal display between the first transparent substrate 2 and the second substrate 3 is observed to be transparent to the first transparent substrate 2 or the second substrate 3. The display of the panel.
  • the first transparent metal film layer may be a similar transparent conductive film layer such as indium tin oxide (ITO).
  • the second metal film layer may be a similar transparent conductive film layer such as indium tin oxide (ITO) or a metal conductive film layer such as silver Ag or aluminum Al.
  • the liquid crystal display panel detecting device further comprises: at least one clip 10 on the first transparent substrate 2 and/or the second substrate 3.
  • the clip 10 can be, but is not limited to, a pneumatic grip.
  • the clip 10 is for holding the first transparent substrate 2 and the object to be tested (glass substrate) or the second substrate 3 and the object to be tested (glass substrate) so that the liquid crystal display panel remains stable on the substrate.
  • the clip 10 on the first transparent substrate 2 is for holding the object to be tested (glass substrate) and the first transparent substrate 2
  • the clip 10 on the second substrate 3 is for holding the object to be tested (glass substrate) and the second substrate 3.
  • the liquid crystal display panel detecting device further includes a control device 11 electrically connected to the signal generator 6, the backlight 7, and the clip 10.
  • the control device 11 is connected to the backlight 7 for controlling the opening and closing of the backlight 7, and controlling the brightness of the backlight 7.
  • the control device 11 is coupled to the clip 10 for controlling the opening of the clip 10.
  • the device 11 is connected to a signal generator 6 for controlling the operation of the signal generator 6.
  • control of the signal generator, backlight, and clip can be accomplished by an operating interface and operating button 20 on the control device.
  • the control device 11 can be disposed on the base, form an integral structure with the base, or can be a device independent of the base.
  • the liquid crystal display panel detecting device further comprises: a light diffusing plate 12 located between the backlight 7 and the first transparent substrate 2 or between the backlight 7 and the second substrate 3.
  • the light diffusing plate 12 is used for diffusing the light of the backlight onto the entire substrate (the first transparent substrate or the second substrate) to ensure uniformity of light projection onto the liquid crystal display panel, which makes the test defect more accurate.
  • the object to be tested may be more than one liquid crystal display panel, such as a glass substrate including a plurality of liquid crystal display panels without a cutting process.
  • the structure of the liquid crystal display panel detecting device shown in FIG. 3 is a side view, and its front view is as shown in FIG.
  • the method for detecting a liquid crystal display panel using the liquid crystal display panel detecting device provided by the embodiment of the present invention is specifically described below, and includes the following steps:
  • Step 1 Place a glass substrate including a plurality of panels on the base of the liquid crystal display panel detecting device.
  • the glass substrate is placed on the base of the liquid crystal display panel detecting device, and is located at the first Between the transparent substrate and the second substrate.
  • the liquid crystal display panel is formed by an array substrate (TFT substrate) and a color film substrate (CF substrate) according to a conventional method.
  • Step 2 Operate a control device having a control panel, control the backlight, the clip holding the glass substrate, and the opening of the signal generator.
  • the display voltage is input to the first transparent metal film layer and the second metal film layer, and the different voltages correspond to different gray scales displayed by the liquid crystal display panel to be detected.
  • the first transparent substrate and the second substrate form a parallel plate capacitor to form a parallel electric field.
  • the electric field can be a constant electric field or an alternating electric field, as determined by the signal generator.
  • the liquid crystal molecules in the respective panels on the glass substrate are deflected along the electric field orientation to achieve display.
  • a backlight located behind the first transparent substrate or the second substrate provides backlighting for the panel. Under a certain display voltage, under a certain backlight light intensity, the liquid crystal display panel will appear the same color, such as all black or all white or a certain gray scale.
  • the liquid crystal molecules in the abnormal region cannot be normally deflected, and the display abnormality in the region is different from the gray scale displayed in other regions. Display uneven. And the display of this abnormality is permanent and will not disappear. This phenomenon indicates that the liquid crystal molecules of the panel are defective.
  • the display signal of the liquid crystal substrate is observed by the human eye, if the image on the display panel is unevenly displayed, it indicates that there is a defect in the liquid crystal panel, and the process of the box is abnormal; if no display unevenness occurs, it indicates There is no abnormality in the box process.
  • the liquid crystal panel detecting apparatus provided by the embodiment of the present invention can also use a bad analysis process. It can be detected that a defect is an electrical defect or an optical defect.
  • the defective liquid crystal cell is placed on the detecting device of the present invention for detection, and the display of the marked area is observed. If the marked area is unevenly displayed, it indicates that the defect is optically poor; if the marked area does not show unevenness, it indicates that the defect is electrically poor.
  • the embodiment of the invention provides a liquid crystal display panel detecting device, and the detection of the liquid crystal display panel can bring the following beneficial effects.
  • the embodiment of the present invention is in the liquid crystal display panel pair compared to the detection of the panel obtained after cutting the glass substrate. After the process of the box, it can be detected, and the bad detection feedback time is very fast.
  • the poor detection of the liquid crystal display panel detecting device of the embodiment of the present invention the visible defects are all bad in the process of the box, and the invisible defect belongs to the array process. This type can be initially classified as poor, which is convenient for subsequent rapid positioning.
  • the liquid crystal display panel detecting device of the embodiment of the invention detects the defect of the panel, and the operation precision of the detecting device is very low. Since the first transparent substrate and the second substrate coated with a conductive film layer (e.g., ITO) are used as the signal input means of the detecting device, it is only necessary to ensure that the substrate to be inspected is in the detecting area.
  • a conductive film layer e.g., ITO
  • the liquid crystal display panel detecting device of the embodiment of the present invention does not need to use expensive hardware such as PCB-A, LVSDS cable, P/G, P/U, and only requires two substrates coated with a conductive film layer and a signal generating device. The detection of the panel can be achieved.
  • the liquid crystal display panel detecting device of the embodiment of the present invention can simultaneously detect the panel on a glass substrate, regardless of the specification and model of the panel, and all types of panels have a common detecting device.
  • the liquid crystal display panel detecting apparatus places a to-be-detected object (a glass substrate including a plurality of liquid crystal display panels) on the first transparent substrate and the second Between the substrates, an electrical signal is applied to the first transparent metal film layer on the first transparent substrate and the second metal film layer on the second substrate through the signal generator, and the light source provided by the backlight is used to realize different gray levels.
  • the display of the image tests the defects of the liquid crystal display panel before cutting. Improve the efficiency of detecting poor performance of the liquid crystal display panel.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
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  • Liquid Crystal (AREA)
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Abstract

一种液晶显示面板检测装置,用以快速检测出被检测的液晶显示面板的不良现象。该液晶显示面板检测装置包括:底座(1);第一透明基板(2),位于所述底座(1)上垂直于底座(1)放置;第二基板(3),位于所述底座(1)上垂直于底座(1)放置,且与所述第一透明基板(2)相对平行放置,其中,所述第一透明基板(2)和第二基板(3)之间的垂直距离不小于被检测的液晶显示面板的厚度;第一透明金属膜层(4),形成在所述第一透明基板(2)上;第二金属膜层(5),形成在所述第二基板(3)上;为第一透明金属膜层(4)和第二金属膜层(5)提供电压信号的信号发生器,与所述第一透明金属膜层(4)和第二金属膜层(5)电连接;为被检测的液晶显示面板提供背光的背光源(7)。

Description

液晶显示面板检测装置 技术领域
本发明的实施例涉及一种液晶显示面板检测装置。 背景技术
在液晶显示技术领域, 液晶显示器件的不良现象经常发生。 减少不良的 发生, 提高产品的良品率, 从而节约成本是每个厂家一直追求的目标。
在 TFT-LCD制造过程中, 液晶显示器件产生不良的现象是不可以避免 的。 所述不良主要分为两大类别: 光学不良和电学不良。 光学不良产生的因 素包括: 液晶、 金属电极、 绝缘层、 取向层和封框胶等出现问题, 并且以上 任何一个因素都会导致如水平黑线、 白线、 黑点等光学不良。 电学不良产生 的因素主要是阵列工艺上的各种缺陷, 如电路线短路、 断路或存在污渍颗粒 等现象。
相应地, 在制作产品的过程中, 有光学检测设备和电学检测设备, 液晶 显示面板的不良可以通过光学检测设备和电学检测设备检测相应的不良现 象。 如通过光学检测设备检测液晶是否具有缺陷、 或通过电学检测设备检测 TFT是否有坏损的情况。
现有技术检测液晶显示面板是否存在光学不良的方法为,通过光学对位, 将与数据线对应的探针和与扫描线对应的探针分别精确接触液晶显示面板的 信号输入端口, 当给液晶显示面板施加信号电压时, 显示画面, 之后检测液 晶显示面板上是否存在不良。 现有的不良检测设备, 只能在一张较大的玻璃 基板经切割工艺之后, 针对每一个经切割工艺后得到的面板去测量, 存在以 下缺陷。
第一、 反馈时间较长。 只有在制作出大量的包括有多个面板的玻璃基板 后,并对每一张玻璃基板进行切割得到液晶显示面板,才能测量面板的不良, 因此无法同时针对一张玻璃基板上的所有面板进行测量。 当某一不良存在一 张玻璃基板上的所有面板中时, ——测试面板的不良, 明显带来较大的工作 量。 并且, 现有无法在切割工艺之前检测面板的不良, 会导致产品的报废率 较高。
第二、 检测出的不良无法判断是电学不良还是光学不良。 在不良分析的 过程中, 如果能够准确识别不良属于电学不良还是光学不良, 可以帮助工程 师更快速地定位不良的原因。
第三、 检测设备的工作精度要求很高。 例如, 检测过程中, 调整检测装 置的位置,使检测装置的检测探针与显示面板的新号输入端的位置——对应, 对设备移动需要精确到 lum。
第四、 检测设备必须使用印刷电路板, 低压差分信号线, 信号发生器, 探针单元等硬件。
第五、 当液晶显示器件的型号发生改变时, 必须更换印刷电路板, 低压 差分信号线探针单元等硬件设备。 即每个尺寸的液晶盒需要相应的一套检测 设备, 检测设备的成本较高。
综上, 现有技术检测面板的不良现象的效率太低, 目前还没有一种检测 设备, 能够在液晶显示面板切割工艺之前就能够检测产品的某些电学不良或 光学不良, 也没有针对所有规格的产品通用的检测设备。 发明内容
本发明实施例提供一种液晶显示面板检测装置, 用以及时高效地检测出 面板的不良现象。
本发明的一个方面提供了一种液晶显示面板检测装置, 包括: 底座; 第 一透明基板, 位于所述底座上、 垂直于底座放置; 第二基板, 位于所述底座 上、 垂直于底座放置, 与所述第一透明基板相对平行放置, 其中, 所述第一 透明基板和第二基板之间的垂直距离不小于被检测的液晶显示面板的厚度; 第一透明金属膜层, 形成在所述第一透明基板上; 第二金属膜层, 形成在所 述第二基板上; 信号发生器, 为第一透明金属膜层和第二金属膜层提供电压 信号, 与所述第一透明金属膜层和第二金属膜层电连接; 背光源, 为被检测 的液晶显示面板提供背光。
本发明的实施例通过将待检测物(包含有多个液晶显示面板的玻璃基板 ) 放置于所述第一透明基板和第二基板之间, 通过信号发生器为位于第一透明 基板上的第一透明金属膜层和位于第二基板上的第二金属膜层施加电压信 号, 以及通过背光源为液晶显示面板提供光源, 实现不同灰阶图像的显示, 测试切割之前的液晶显示面板的不良现象。 提高检测液晶显示面板不良的效 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液晶显示面板检测装置结构侧视示意图; 图 2为本发明实施例提供的液晶显示面板检测装置结构正视示意图; 图 3 为本发明实施例提供的另一液晶显示面板检测装置结构侧视示意 图;
图 4 为本发明实施例提供的另一液晶显示面板检测装置结构正视示意 图;
图 5为本发明实施例提供的液晶显示面板上不良的形状和区域示意图。 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。 "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 也相应地改变。
本发明实施例提供了一种液晶显示面板检测装置, 用以快速检测出切割 之前的玻璃基板上的各液晶显示面板的不良现象。
本说明书提及的液晶显示面板(简称面板)为将一整块基板(例如玻璃 基板 )切割之后得到的单个面板,每一块面板对应地用于一个液晶显示装置。 一整块基板可以用于同时制作多个一定尺寸的液晶显示面板。 将包含有多个 液晶显示面板的基板进行切割, 得到多个独立的液晶显示面板。
通常, 所述液晶显示面板的制作流程为阵列工艺、 彩膜工艺、 液晶盒工 艺, 和模组工艺。 阵列工艺、 彩膜工艺、 液晶盒工艺都是在一整块例如玻璃 基板上完成的, 即, 在玻璃基板切割之前完成的。 模组工艺是在玻璃基板经 切割之后得到单元面板上完成的。
一般情况下, 一块玻璃基板的长和宽都可能在一米以上, 可以被切割成 多块面板。 在液晶显示器件的制作流程中, 约有 300多次工序, 每道工序都 有可能造成液晶显示面板的不良。 因此, 及时检测出每道工序中液晶面板出 现的不良并尽快解决, 对于产品的大批量生产模式是非常重要的。 如果在某 一道工序中出现了问题且没有及时发现, 造成不可挽回的损失是巨大的。
本发明的实施例针对某些不良, 如液晶盒工艺之后, 如面板出现的关于 液晶质量问题导致的不良或者 TFT损坏导致的不良等,在玻璃基板没有进行 切割工艺之前, 使用液晶显示面板检测装置对一整块玻璃基板上的面板进行 不良的检测, 及时发现不良的产生, 及时解决。
图 1为本发明实施例提供的液晶显示面板检测装置的侧视示意图。
本发明实施例提供的一种液晶显示面板检测装置, 包括:
底座 1 ;
第一透明基板 2, 位于底座 1上且垂直于底座 1放置;
第二基板 3 , 位于底座 1上且垂直于底座 1放置, 该第二基板 3与第一 透明基板 2相对平行放置, 且第一透明基板 2和第二基板 3之间的垂直距离 不小于被检测的液晶显示面板的厚度;
第一透明金属膜层 4, 形成在第一透明基板 2上;
第二金属膜层 5, 形成在第二基板 3上;
信号发生器 6,为第一透明金属膜层 4和第二金属膜层 5提供电压信号, 与第一透明金属膜层 4, 和第二金属膜层 5电连接;
背光源 7, 为被检测的液晶显示面板提供背光。
第一透明金属膜层 4可以形成在第一透明基板 2的任意一侧; 而且, 第 二金属膜层 5也可以形成在第二基板 3的任意一侧。
为了保护第一透明金属膜层 4或第二金属膜层 5不会受损, 优选地, 第 一透明金属膜层 4,形成在第一透明基板 2上与第二基板 3相距较远的一侧; 第二金属膜层 5, 形成在第二基板 3上与第一透明基板 2相距较远的一侧。
所述第二基板 3可以是透明的也可以是不透明的。
所述第二金属膜层 5可以是透明的也可以是不透明的。
优选地, 所述第一透明基板 2和第二基板 3的面积不小于被检测的液晶 显示面板的面积,以保证被检测的液晶显示面板在一次检测过程中都被检测。
图 2为本发明实施例提供的液晶显示面板检测装置的正视示意图。
本发明实施例通过将待检测物体(包含有多个液晶显示面板的玻璃基板 ) 放置于所述第一透明基板和第二基板之间, 通过信号发生器为位于第一透明 基板上的第一透明金属膜层和位于第二基板上的第二金属膜层施加电信号, 以及通过背光源提供的光源, 实现不同灰阶图像的显示, 测试切割之前的液 晶显示面板的不良现象。 这可以提高检测液晶显示面板不良的效率。
优选地, 所述信号发生器 6可以位于所述底座上, 所述背光源 7也可以 位于所述底座上。 所述信号发生器 6或背光源 7也可以是和底座相独立的装 置。
优选地, 背光源 7为亮度可调的背光源。
参见图 3 , 根据本发明另一个实施例, 所述液晶显示面板检测装置还可 包括:
第一偏光片 8, 形成在第一透明金属膜层 4之上;
第二偏光片 9, 形成在第二金属膜层 5之上。
优选地, 第一透明基板 2和 /或第二基板 3可以为玻璃基板, 便于透光第 一透明基板 2或第二基板 3观察位于第一透明基板 2和第二基板 3之间的液 晶显示面板的显示画面。
优选地, 所述第一透明金属膜层可以为铟锡氧化物 (ITO )等类似的透 明导电膜层。 所述第二金属膜层可以是铟锡氧化物 (ITO )等类似的透明导电膜层, 或者为金属导电膜层, 如银 Ag或者铝 Al。
优选地, 在一个示例中, 所述液晶显示面板检测装置还包括: 位于第一 透明基板 2和 /或第二基板 3上的至少一个夹子 10。 所述夹子 10可以但不限 于为气动夹子。该夹子 10用于夹持第一透明基板 2与待测物(玻璃基板)或 第二基板 3与待测物 (玻璃基板) , 使得液晶显示面板在底座上保持稳定。 第一透明基板 2上的夹子 10用于夹持待测物(玻璃基板)和第一透明基板 2, 第二基板 3上的夹子 10用于夹持待测物(玻璃基板)和第二基板 3。
优选地, 在一个示例中, 所述液晶显示面板检测装置还包括与信号发生 器 6、 背光源 7, 以及夹子 10电连接的控制装置 11。 该控制装置 11与背光 源 7连接用于控制背光源 7的开闭, 以及控制背光源 7的亮度。 该控制装置 11与夹子 10连接, 用于控制夹子 10的开关。 该制装置 11与信号发生器 6 连接, 用于控制信号发生器 6工作。 优选地, 可以通过所述控制装置上的操 作界面和操作按钮 20实现对信号发生器、 背光源, 以及夹子的控制。
所述控制装置 11可以设置在底座上,与底座构成一个整体结构,或者可 以是一个独立于底座的装置。
优选地, 在一个示例中, 所述液晶显示面板检测装置还包括: 位于背光 源 7和第一透明基板 2或者位于背光源 7和第二基板 3之间的光线扩散板 12。 光线扩散板 12用于将背光源的光线均勾扩散到整个基板(第一透明基板或第 二基板)上, 保证光线投射到液晶显示面板上的均匀性, 使得测试的不良更 加准确。
本发明实施例中待测物可以为不止一个液晶显示面板, 例如未经切割工 艺的包含有多个液晶显示面板的玻璃基板。
图 3所示的液晶显示面板检测装置的结构为侧视示意图, 其正视示意图 如图 4所示。
下面具体说明使用本发明实施例提供的液晶显示面板检测装置, 检测液 晶显示面板的方法, 包括以下步骤:
步骤一、 将一张包含有多个面板的玻璃基板放置于液晶显示面板检测装 置的底座上。
具体地, 将玻璃基板放置于液晶显示面板检测装置的底座上、 位于第一 透明基板和第二基板之间。
所述液晶显示面板是根据现有的方法通过阵列基板(TFT基板)和彩膜 基板(CF基板) , 对盒工艺后形成。
步骤二、 操作具有控制面板的控制装置, 控制背光源、 夹持玻璃基板的 夹子, 以及信号发生器的打开。
具体地, 在控制装置控制打开信号发生器之后, 通过对第一透明金属膜 层和第二金属膜层输入显示电压, 不同的电压对应被检测的液晶显示面板显 示的不同的灰阶。
当将信号发生器的显示电压输入到第一透明基板上的第一导电膜层上和 第二基板上的第二导电膜层上时, 第一透明基板和第二基板组成平行板电容 器形成平行电场。 该电场可以是恒定电场或交变电场, 由信号发生器决定。 玻璃基板上的各面板中的液晶分子沿电场取向偏转实现显示。 位于第一透明 基板或者第二基板后的背光源为面板提供背光。 在一定的显示电压下, 一定 的背光源光强下, 液晶显示面板会出现同一的颜色, 如全黑或者全白或者一 定的灰度。
通过液晶显示面板上的显示图像的特征可以判断, 液晶显示面板的不良 是光学不良还是电学不良,或者是光学不良或电学不良中的具体哪一种不良。
例如: 第一透明基板和第二基板之间施加电场后, 当液晶层中出现液晶 异常, 异常区域的液晶分子将无法正常偏转, 该区域的就出现显示异常与其 他区域显示的画面灰度不同显示不均。 且这种异常的显示是永久性的, 不会 消失, 这种现象表明面板的液晶分子有缺陷。
本发明实施例可以通过人眼观察液晶基板输入显示信号后, 如果出现显 示面板上的图像显示不均, 则表明液晶面板内有缺陷, 对盒工艺有异常; 如 果没有出现显示不均, 则表明对盒工艺没有异常。
本发明实施例提供的液晶面板检测装置还可以用到不良分析过程。 可以 检测某种不良属于电学性不良或者是光学性不良。
当在正常液晶盒检测工位检测出来一种显示不均的不良, 该不良无法确 定是否为电学性不良。 可以进行如下处理。
一、 对液晶盒不良处进行标记( Mark )处理, 明确标注出不良的形状和 区域。 当液晶层中出现液晶异常或者取向膜(例如 PI膜)层中出现异常, 如图 5所示的 42为异常区域, 41为正常区域。 异常区域 42的液晶分子无法正常 偏转, 该区域的显示异常与其他区域显示的画面灰度不同, 导致显示不均, 该不良属于光学性不良。 当薄膜晶体管 (TFT ) 器件损坏, TFT器件电学特 性不均匀时候, 该区域的取向膜(例如 PI膜)和液晶膜正常液晶分子可以正 不良还是光学性不良。
二、 将不良的液晶盒放置于本发明的检测设备上进行检测, 观察标记区 域的显示情况。 如标记区域出现显示不均, 则表明该不良为光学性不良; 如 果标记区域没有出现显示不均, 则表明该不良为电学性不良。
综上所述, 本发明实施例提供了一种液晶显示面板检测装置, 检测液晶 显示面板可以带来以下有益效果。
第一、 由于在一次检测过程中, 检测的是玻璃基板上的多个面板, 如果 面板上出现不良, 相比较对切割玻璃基板后得到的面板的检测, 本发明的实 施例在液晶显示面板对盒工艺后即可检测, 不良检测反馈时间很快。
第二、 本发明实施例的液晶显示面板检测装置检测的不良, 可见的不良 都属于对盒工艺不良, 不可见的不良属于阵列工艺不良。 可以初步归类不良 的这类, 便于后续快速定位不良。
第三、 本发明实施例的液晶显示面板检测装置检测面板的不良, 对检测 设备的工作精度要求很低。 因为使用镀有导电膜层(如 ITO ) 的第一透明基 板和第二基板作为检测设备的信号输入装置, 因此只需要保证待检测基板处 于检测区域即可。
第四、本发明实施例的液晶显示面板检测装置无需使用 PCB-A、 LVSDS 缆线、 P/G 、 P/U等昂贵的硬件, 仅需两块镀有导电膜层的基板和信号发生 装置即可实现对面板的检测。
第五、 本发明实施例的液晶显示面板检测装置可以同时对一张玻璃基板 上的面板进行检测, 无需考虑面板的规格型号, 所有型号的面板通用一套检 测设备。
综上所述, 本发明实施例提供的液晶显示面板检测装置, 通过将待检测 物 (包含有多个液晶显示面板的玻璃基板)放置于所述第一透明基板和第二 基板之间, 通过信号发生器为位于第一透明基板上的第一透明金属膜层和位 于第二基板上的第二金属膜层施加电信号, 以及通过背光源提供的光源, 实 现不同灰阶图像的显示, 测试切割之前的液晶显示面板的不良现象。 提高检 测液晶显示面板不良的效率。
以上所述仅是本发明的优选实施方式,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、 一种液晶显示面板检测装置, 包括:
底座;
第一透明基板, 位于所述底座上、 垂直于底座放置;
第二基板, 位于所述底座上、 垂直于底座放置, 与所述第一透明基板相 对平行放置, 其中, 所述第一透明基板和第二基板之间的垂直距离不小于被 检测的液晶显示面板的厚度;
第一透明金属膜层形成在所述第一透明基板上;
第二金属膜层, 形成在所述第二基板上;
信号发生器, 为第一透明金属膜层和第二金属膜层提供电压信号, 与所 述第一透明金属膜层和第二金属膜层电连接;
背光源, 为被检测的液晶显示面板提供背光。
2、根据权利要求 1所述的装置,其中,所述信号发生器位于所述底座上, 所述背光源位于所述底座上。
3、根据权利要求 1或 2所述的装置, 其中, 所述第一透明基板和第二基 板的面积不小于皮检 'J的液晶显示面板的面积。
4、 根据权利要求 1-3任一所述的装置, 其中, 所述第一透明金属膜层形 成在所述第一透明基板上与第二基板相距较远的一侧。
5、 根据权利要求 1-4任一所述的装置, 其中, 所述第二金属膜层, 形成 在所述第二基板上与第一透明基板相距较远的一侧。
6、 根据权利要求 1-5任一所述的装置, 还包括:
第一偏光片, 形成在所述第一透明金属膜层之上;
第二偏光片, 形成在所述第二金属膜层之上。
7、 根据权利要求 1-6任一所述的装置, 其中, 所述第一透明基板和 /或 第二基板为透明玻璃基板。
8、 根据权利要求 1-7任一所述的装置, 其中, 所述第一透明金属膜层或 第二金属膜层为铟锡氧化物导电膜层。
9、 根据权利要求 1-8任一所述的装置, 还包括: 位于所述第一透明基板 和 /或第二基板上的至少一个夹持待检测的液晶显示面板的夹子。
10、 根据权利要求 9所述的装置, 其中, 所述夹子为气动夹子。
11、根据权利要求 10所述的装置,还包括: 与所述信号发生器、背光源, 以及夹子电连接且用于控制所述信号发生器、 背光源, 以及夹子工作的控制 装置。
12、 根据权利要求 1-11任一所述的装置, 还包括: 位于背光源和所述第 一透明基板或者位于背光源和所述第二基板之间的光线扩散板。
PCT/CN2012/083712 2012-06-29 2012-10-29 液晶显示面板检测装置 Ceased WO2014000354A1 (zh)

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