WO2014056260A1 - 一种光配向液晶面板光学检测的方法及其检测设备 - Google Patents

一种光配向液晶面板光学检测的方法及其检测设备 Download PDF

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Publication number
WO2014056260A1
WO2014056260A1 PCT/CN2012/083471 CN2012083471W WO2014056260A1 WO 2014056260 A1 WO2014056260 A1 WO 2014056260A1 CN 2012083471 W CN2012083471 W CN 2012083471W WO 2014056260 A1 WO2014056260 A1 WO 2014056260A1
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Prior art keywords
image
liquid crystal
sub
crystal panel
pixel
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PCT/CN2012/083471
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English (en)
French (fr)
Inventor
莫圣鹏
江文彬
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深圳市华星光电技术有限公司
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Priority to US13/701,831 priority Critical patent/US20140098336A1/en
Publication of WO2014056260A1 publication Critical patent/WO2014056260A1/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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
    • G02F1/133788—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation by light irradiation, e.g. linearly polarised light photo-polymerisation

Definitions

  • the present invention relates to the field of liquid crystal display, and more particularly to a method for optical detection of a light alignment liquid crystal panel and a detection apparatus therefor.
  • one sub-pixel is corresponding to the three primary colors, and then one display pixel is composed of at least three sub-pixels respectively corresponding to the three primary colors.
  • the sub-pixel is filled with liquid crystal.
  • it is generally required to set the liquid crystal molecules at a predetermined angle.
  • Figure 1 shows a process for setting the pretilt angle of liquid crystal molecules by using a photo-alignment technique.
  • the so-called photo-alignment technique refers to illuminating the alignment agent in the panel by ultraviolet (UV) light irradiation when a voltage is applied to the substrate.
  • Monomer reacts to achieve the purpose of liquid crystal alignment.
  • optical alignment liquid crystal panel technology has been widely used in the high-generation TFT-LCD industry.
  • AOI optical automatic optics
  • UVM ultraviolet irradiation
  • the inspection machine is specially designed to check whether the alignment image (LC image) of the substrate after the UVM device is irradiated is abnormal.
  • the AOI equipment can detect the alignment abnormality in time, avoiding the large amount of scrapped due to the poor connection of the UVM device-probe bar (Probe bar).
  • the way in which the AOI checks the alignment abnormality is the LC image inspection.
  • the LC image is acquired by the imaging device, and the model image is pre-established by the inspection program (see FIG. 2). If the image difference is large, it is judged as unqualified (NG); if the difference is small, it is judged as qualified (OK).
  • the current image mode comparison can only use a single sub-pixel as a detection unit to obtain a frame image of a single sub-pixel, and then judge OK or NG by the image frame difference similarity, which is prone to missed phenomenon.
  • the technical problem to be solved by the present invention is to provide a method and an apparatus for detecting optical detection of a light alignment liquid crystal panel with reduced image comparison misjudgment and enhanced success rate of interception.
  • the object of the present invention is achieved by the following technical solutions:
  • a method for optically detecting a liquid crystal panel comprising the steps of:
  • the internal image of the detection unit of the liquid crystal panel to be detected is generated by the preset detection unit, and the image to be detected is generated, and compared with the mode image; the comparison result is generated.
  • the detecting unit is a sub-pixel
  • the mode image includes an internal image of the sub-pixel.
  • Sub-pixels are used as the basic components of the pixels, and are compared one by one, which can improve the success rate of single sub-pixels, ensure the integrity of each sub-pixel of the qualified finished product, and improve the display. quality.
  • the mode image includes a frame image of at least one sub-pixel. Increase the border image of the sub-pixels, and compare the features to make the judgment more accurate.
  • the detecting unit includes at least three sub-pixels respectively corresponding to the three primary colors, and the mode image includes a frame image of all the sub-pixels.
  • the liquid crystal display is a pixel-based display unit, and each pixel includes at least three sub-pixels, and in actual production, a certain sub-pixel may not be displayed at all. Therefore, the technical solution is at least one pixel.
  • As a detecting unit it is possible to detect a failure of a single sub-pixel in the pixel, and further improve the success rate of the interception.
  • the mode image includes an internal image of at least one sub-pixel.
  • the internal image of the sub-pixel is added, and the characteristics of the internal image are relatively large.
  • the internal image is added to the contrast, which can further improve the accuracy of the judgment.
  • the internal image of the detecting unit to be detected is compared with the mode image by a computer fuzzy comparison method to generate a comparison result. This is a specific method of comparison.
  • the internal image of the light-aligning detection unit of the liquid crystal panel is first acquired by the image capturing device, and then the line feature of the internal image is extracted by a computer and then recomposed to form the mode image.
  • the inventor's research found that when an alignment abnormality occurs, the sub-pixel appears inside. Dark lines such as pattern and fish belly type have obvious differences compared with normal sub-pixels, and the bad patterns exhibit obvious line features. Therefore, the present invention uses the line pattern of the internal image of the sub-pixel as a pattern image, as long as the line pattern is performed.
  • the comparison can be similar (similar to fingerprint recognition), without the need for color-related feature comparison, under the premise of ensuring the success rate of the detection, the comparison difficulty can be optimized, and the comparison speed can be improved.
  • the internal resolution of the detecting unit is maximized by adjusting the magnification of the imaging device and the brightness of the backlight, and then the internal image of the qualified detecting unit of the optical matching liquid crystal panel is acquired as a mode image.
  • An optical alignment device for optical alignment of a liquid crystal panel comprising:
  • An imaging device for acquiring an internal image of the detecting unit
  • An internal image coupled with the imaging device for acquiring a qualified detection unit of the light alignment liquid crystal panel as a modeling device for the mode image;
  • a comparing device that compares the internal image of the detecting unit to be inspected with the mode image.
  • the detecting unit is a sub-pixel
  • the modeling device acquires an internal image of the sub-pixel as a mode image.
  • This is a specific detection unit division method.
  • Sub-pixels are used as the basic components of the pixels, and are compared one by one, which can improve the success rate of single sub-pixels, ensure the integrity of each sub-pixel of the qualified finished product, and improve the display. quality.
  • the detecting unit includes at least three sub-pixels respectively corresponding to the three primary colors, and the modeling device acquires a frame image of all the sub-pixels as a mode image.
  • the liquid crystal display is a pixel-based display unit, and each pixel includes at least three sub-pixels, and in actual production, a certain sub-pixel may not be displayed at all. Therefore, the technical solution is at least one pixel.
  • As a detecting unit it is possible to detect a failure of a single sub-pixel in the pixel, and further improve the success rate of the interception.
  • the internal image of the detection unit is incorporated into the mode image, and the comparison image has more features than the single-pixel frame image as the mode image, and the coverage range is also More extensive, so that when comparing, there are more reference details, which can be effectively reduced. Less image comparison misjudgment, enhance the success rate of the interception.
  • FIG. 1 is a schematic diagram of a principle of a light alignment liquid crystal panel
  • FIG. 2 is a schematic diagram of a conventional method for detecting a single sub-pixel frame image as a comparison object
  • FIG. 3 is a schematic diagram of a fault in a sub-pixel
  • Figure 4 is a schematic diagram of the failure of the sub-pixels
  • Figure 5 is a schematic flow diagram of the process of the present invention.
  • the present invention discloses a method for optical detection of a light alignment liquid crystal panel, the method comprising the steps of:
  • the internal image of the detection unit of the liquid crystal panel to be detected is generated by the preset detection unit, and the image to be detected is generated, and compared with the mode image; the comparison result is generated.
  • the internal image of the detection unit is incorporated into the mode image, and the comparison image has more features than the single-pixel frame image as the mode image, and the coverage range is also More extensive, so that there are more reference details when comparing, which can effectively reduce the misjudgment of image comparison and enhance the success rate of interception.
  • This embodiment discloses a method for optically detecting a light alignment liquid crystal panel, and the method includes the following steps:
  • A using one sub-pixel as a detecting unit, and using the internal image of the sub-pixel as a mode image;
  • step A The internal image of the detection unit of the liquid crystal panel to be detected is generated by the preset detection unit, and the image to be detected is generated, and compared with the mode image; the comparison result is generated.
  • the internal resolution of the detection unit can be maximized by adjusting the magnification of the imaging device and the brightness of the backlight, and then the optical alignment panel is qualified.
  • the internal image of the detection unit is used as a mode image.
  • step B the internal image of the detecting unit to be detected is compared with the mode image by a computer fuzzy comparison method to generate a comparison result.
  • the mode image and the image to be inspected may be pictures taken directly by the camera device, or the line features of the internal image may be extracted by a computer and then recomposed to form a mode image and a to-be-detected image.
  • the inventors have found that when an alignment abnormality occurs, dark lines such as a pattern type and a fish belly type appear inside the sub-pixel, which is distinct from the normal sub-pixel, and the bad pattern exhibits obvious line characteristics, so the sub-pixel
  • the line pattern of the internal image of the pixel is used as the mode image, as long as the line pattern is compared (similar to fingerprint recognition), no color-related feature comparison is required, and the ratio of the success rate of the check can be reduced. For difficulty, increase the speed of comparison.
  • the first type of detection unit is divided, and the sub-pixels are used as basic components of the pixels, and the comparison is performed one by one, which can improve the success rate of the single sub-pixels, and ensure the integrity of each sub-pixel of the qualified finished product. Improve display quality.
  • This embodiment is a further improvement of the first embodiment. On the basis of acquiring the internal image of the sub-pixel, the frame image of the sub-pixel is added, and the comparison feature is added, which makes the judgment more accurate.
  • the detecting unit includes at least three sub-pixels respectively corresponding to the three primary colors, and the mode image includes a frame image of all the sub-pixels.
  • This embodiment discloses a method for optically detecting a light alignment liquid crystal panel, and the method includes the following steps:
  • step A The internal image of the detection unit of the liquid crystal panel to be detected is generated by the preset detection unit, and the image to be detected is generated, and compared with the mode image; the comparison result is generated.
  • the internal resolution of the detection unit can be maximized by adjusting the magnification of the imaging device and the brightness of the backlight, and then the optical alignment panel is qualified.
  • the internal image of the detection unit is used as a mode image.
  • step B the internal image of the detecting unit to be detected is compared with the mode image by a computer fuzzy comparison method to generate a comparison result.
  • the mode image and the image to be inspected may be pictures taken directly by the camera device, or the line features of the internal image may be extracted by a computer and then recomposed to form a mode image and a to-be-detected image.
  • the line feature as the comparison object, as long as the line pattern is compared (similar to fingerprint recognition), there is no need to perform color-related feature comparison.
  • the comparison difficulty can be optimized, and the comparison can be improved. speed.
  • This embodiment is a division manner of the second detecting unit, and at least three sub-pixels respectively corresponding to the three primary colors are used as one detecting unit, that is, one detecting unit includes at least one complete pixel.
  • the liquid crystal display is a pixel-based display unit, and each pixel includes at least three sub-pixels. In actual production, a certain sub-pixel may not be displayed at all. As shown in FIG. 4, the existing sub-pixel is used. The way the unit is detected is that it cannot be identified. Therefore, the technical solution is used as a detecting unit in at least one pixel, and can detect a fault of a single sub-pixel in the pixel, thereby further improving the success rate of the pull detection.
  • This embodiment is a further improvement of the third embodiment.
  • an internal image of at least one sub-pixel is added. Since the feature ratio of the internal image of the sub-pixel is relatively large, the internal image is added to the contrast, which can further improve the accuracy of the judgment.
  • the invention also discloses an optical alignment device for optical alignment liquid crystal panel, comprising:
  • An imaging device for acquiring an internal image of the detecting unit
  • the detecting unit is one sub-pixel or a combination of a plurality of sub-pixels.
  • the modeling device can acquire the internal image of the sub-pixel as the mode image, and can also add the frame image as the mode image.
  • the sub-pixels are compared one by one, which can improve the success rate of the single sub-pixels, ensure the integrity of each sub-pixel of the qualified finished product, and improve the display quality.
  • the modeling device can obtain a frame image of each sub-pixel as a mode image, and can also add an internal image of any one or more sub-pixels as a mode image.
  • the liquid crystal display is a pixel-based display unit, and each pixel includes at least three sub-pixels, and in actual production, a certain sub-pixel may not be displayed at all. Therefore, the technical solution is at least one pixel.
  • As a detecting unit it is possible to detect a failure of a single sub-pixel in the pixel, and further improve the success rate of the pull detection.

Abstract

一种光配向液晶面板光学检测的方法及其检测设备。所述光配向液晶面板光学检测的方法包括步骤：A、根据光配向液晶面板的一个合格的预设的检测单元的内部影像生成模式影像；B、以预设的检测单元为单位，获取待检的光配向液晶面板的检测单元的内部影像生成待检影像，跟模式影像进行比对；生成比对结果。根据预设的检测单元为基准的比对单位，将检测单元的内部影像纳入模式影像，相比简单以子像素边框影像作为模式影像的做法，对比的特征更多，覆盖的范围也更广，这样在比对的时候有了更多的参考细节，可以有效减少影像比对误判，增强拦检成功率。

Description

一种光配向液晶面板光学检测的方法及其检测设备
【技术领域】
本发明涉及液晶显示领域， 更具体的说， 涉及一种光配向液晶面板光学检 测的方法及其检测设备。
【背景技术】
在液晶显示器中， 以三原色为基础， 对应有一个子像素， 然后由至少 3个 分别跟三原色对应的子像素构成一个显示像素。 子像素中填充有液晶， 为了提 高液晶分子的响应速度， 一般都需要将液晶分子预先设置一定的角度。 图 1 所 示为一种采用光配向技术设置液晶分子的预倾角的工艺流程， 所谓光配向技术 是指在给基板印加电压的情况下， 通过紫外线（UV ) 光照射促使面板内的取向 剂 （ monomer )反应， 从而达到液晶配向的目的。 目前， 光配向液晶面板技术已 广泛应用于高世代 TFT-LCD行业中， 在光配向液晶面板时， 为了及时发现不合 格的产品， 需要在紫外线照射（UVM )设备后配置光自动光学（AOI )检查机， 专门检查经过 UVM设备照射完成后基板的配向影像（LC影像）是否有异常。 AOI设备能及时拉检配向异常， 避免因 UVM设备印加装置-探头栏（Probe bar ) 连接（Contact ) 不良造成大量报废。 AOI检查配向异常的方式为 LC影像检查， 是在给基板印加电压的情况下， 由摄像装置取得 LC影像， 经由检查程序预先建 立好的模式（Model )影像做比对评分（参见图 2 ), 如果影像差异大则判断为不 合格（ NG ); 差异小则判断合格（ OK )。 目前的影像模式比对只能以单个子像素 为检测单元， 获取单个子像素的边框影像， 然后通过影像边框差异相似度来判 定 OK或 NG, 容易出现漏判的现象。
【发明内容】
本发明所要解决的技术问题是提供一种减少影像比对误判， 增强拦检成功 率的光配向液晶面板光学检测的方法及其检测设备。 本发明的目的是通过以下技术方案来实现的：
一种光配向液晶面板光学检测的方法， 包括步骤：
A、根据光配向液晶面板的一个合格的预设的检测单元的内部影像生成模式 影像；
B、 以预设的检测单元为单位， 获取待检的光配向液晶面板的检测单元的内 部影像生成待检影像， 跟模式影像进行比对； 生成比对结果。
进一步的， 所述步骤 A中， 所述检测单元为一个子像素， 所述模式影像包 括所述子像素的内部影像。 此为一种具体的检测单元划分方式， 子像素作为像 素的基本构件， 进行逐一进行比对， 可以提高单个子像素不良的拦检成功率， 确保合格的成品每个子像素的完整性， 提升显示品质。
进一步的， 所述模式影像包括至少一个子像素的边框影像。 增加子像素的 边框影像， 多了比较特征， 判断更准确。
进一步的， 所述步骤 A中， 所述检测单元包括至少三个分别跟三原色对应 的子像素， 所述模式影像包括所有子像素的边框影像。 液晶显示是以像素为基 本的显示单位， 每个像素中包括了至少三个子像素， 而在实际生产中可能会出 现某个子像素完全没有显示的情况， 因此， 本技术方案至少以一个像素为单位 作为检测单元， 可以检测出像素中单个子像素全无的故障， 进一步提升拦检成 功率。
进一步的， 所述模式影像包括至少一个子像素的内部影像。 增加子像素的 内部影像， 内部影像的特征比较多， 将内部影像加入对比， 可以进一步提升判 断的准确性。
进一步的， 所述步骤 B 中， 通过计算机模糊比较的方法， 将待检的检测单 元的内部影像跟模式影像进行比对， 生成比对结果。 此为一种具体的比对方法。
进一步的， 所述步骤 A中， 先通过摄像装置获取光配向液晶面板合格的检 测单元的内部影像， 然后再通过计算机抽取内部影像的线条特征后重新构图， 形成所述模式影像。 发明人研究发现， 当发生配向异常时， 子像素内部会出现 花纹型、 鱼肚型等暗线， 跟正常子像素相比区别明显， 而且不良的图案呈现出 明显的线条特征， 因此， 本发明将子像素的内部影像的线条图案作为模式影像， 只要进行线条图案的比对即可（类似于指纹识别）， 无须进行颜色相关的特征比 对， 在保障拉检成功率的前提下， 可以筒化比对难度， 提升比对速度。
进一步的， 所述步骤 A中， 先通过调节摄像装置倍率以及背光源亮度， 使 检测单元的内部结构清晰度最大化， 然后再获取光配向液晶面板合格的检测单 元的内部影像， 作为模式影像。 通过提高影像的分辨率， 可以获取更多的参照 特征， 有利于提升比对的准确度。
一种光配向液晶面板光学检测设备， 包括：
用于获取检测单元内部影像的摄像装置；
跟摄像装置耦合、 用于获取光配向液晶面板的一个合格的检测单元的内部 影像， 作为模式影像的建模装置；
以及将待检的检测单元的内部影像跟模式影像进行比对的比较装置。
进一步的， 所述检测单元为一个子像素， 所述建模装置获取所述子像素的 内部影像作为模式影像。 此为一种具体的检测单元划分方式， 子像素作为像素 的基本构件， 进行逐一进行比对， 可以提高单个子像素不良的拦检成功率， 确 保合格的成品每个子像素的完整性， 提升显示品质。
进一步的， 所述检测单元包括至少三个分别跟三原色对应的子像素， 所述 建模装置获取所有子像素的边框影像作为模式影像。 液晶显示是以像素为基本 的显示单位， 每个像素中包括了至少三个子像素， 而在实际生产中可能会出现 某个子像素完全没有显示的情况， 因此， 本技术方案至少以一个像素为单位作 为检测单元， 可以检测出像素中单个子像素全无的故障， 进一步提升拦检成功 率。
本发明根据预设的检测单元为基准的比对单位， 将检测单元的内部影像纳 入模式影像， 相比筒单以子像素边框影像作为模式影像的做法， 对比的特征更 多， 覆盖的范围也更广， 这样在比对的时候有了更多的参考细节， 可以有效减 少影像比对误判， 增强拦检成功率。 【附图说明】
图 1是光配向液晶面板的原理示意图；
图 2是现有的一种以单个子像素边框影像作为比对对象的检测方法示意图； 图 3是子像素内部不良的故障示意图；
图 4是子像素全无的故障示意图；
图 5是本发明方法的流程示意图。
【具体实施方式】
参见图 5 ,本发明公开了一种光配向液晶面板光学检测的方法，该方法包括 步骤：
A、根据光配向液晶面板的一个合格的预设的检测单元的内部影像生成模式 影像；
B、 以预设的检测单元为单位， 获取待检的光配向液晶面板的检测单元的内 部影像生成待检影像， 跟模式影像进行比对； 生成比对结果。
本发明根据预设的检测单元为基准的比对单位， 将检测单元的内部影像纳 入模式影像， 相比筒单以子像素边框影像作为模式影像的做法， 对比的特征更 多， 覆盖的范围也更广， 这样在比对的时候有了更多的参考细节， 可以有效减 少影像比对误判， 增强拦检成功率。
下面结合附图和较佳的实施例对本发明作进一步说明。
实施例一
本实施例公开一种光配向液晶面板光学检测的方法， 该方法包括步骤：
A、 以一个子像素作为一个检测单元， 以子像素的内部影像作为模式影像；
B、 以预设的检测单元为单位， 获取待检的光配向液晶面板的检测单元的内 部影像生成待检影像， 跟模式影像进行比对； 生成比对结果。 为了获取更多的参照特征， 提升比对的准确度， 步骤 A中可以先通过调节 摄像装置倍率以及背光源亮度， 使检测单元的内部结构清晰度最大化， 然后再 获取光配向液晶面板合格的检测单元的内部影像， 作为模式影像。
步骤 B中可以通过计算机模糊比较的方法， 将待检的检测单元的内部影像 跟模式影像进行比对， 生成比对结果。
步骤 A和 B中，模式影像和待检影像可以是摄像装置直接拍照出来的图片， 也可以通过计算机抽取内部影像的线条特征后重新构图， 形成模式影像和待检 影像。 参见图 3发明人研究发现， 当发生配向异常时， 子像素内部会出现花纹 型、 鱼肚型等暗线， 跟正常子像素相比区别明显， 而且不良的图案呈现出明显 的线条特征， 因此将子像素的内部影像的线条图案作为模式影像， 只要进行线 条图案的比对即可（类似于指纹识别）， 无须进行颜色相关的特征比对， 在保障 拦检成功率的前提下， 可以筒化比对难度， 提升比对速度。
本实施例是第一种检测单元的划分方式， 子像素作为像素的基本构件， 进 行逐一进行比对， 可以提高单个子像素不良的拦检成功率， 确保合格的成品每 个子像素的完整性， 提升显示品质。
实施例二
本实施例是对实施例一的进一步改进， 在获取子像素内部影像的基础上， 增加子像素的边框影像， 多了比较特征， 可以让判断更准确。
实施例三
进一步的， 所述步骤 A中， 所述检测单元包括至少三个分别跟三原色对应 的子像素， 所述模式影像包括所有子像素的边框影像。
本实施例公开一种光配向液晶面板光学检测的方法， 该方法包括步骤：
A、以至少三个分别跟三原色对应的子像素作为一个检测单元， 以所有子像 素的边框影像作为模式影像；
B、 以预设的检测单元为单位， 获取待检的光配向液晶面板的检测单元的内 部影像生成待检影像， 跟模式影像进行比对； 生成比对结果。 为了获取更多的参照特征， 提升比对的准确度， 步骤 A中可以先通过调节 摄像装置倍率以及背光源亮度， 使检测单元的内部结构清晰度最大化， 然后再 获取光配向液晶面板合格的检测单元的内部影像， 作为模式影像。
步骤 B中可以通过计算机模糊比较的方法， 将待检的检测单元的内部影像 跟模式影像进行比对， 生成比对结果。
步骤 A和 B中，模式影像和待检影像可以是摄像装置直接拍照出来的图片， 也可以通过计算机抽取内部影像的线条特征后重新构图， 形成模式影像和待检 影像。 以线条特征作为比较对象， 只要比对线条图案即可（类似于指纹识别）， 无须进行颜色相关的特征比对， 在保障拦检成功率的前提下， 可以筒化比对难 度， 提升比对速度。
本实施例是第二种检测单元的划分方式， 以至少三个分别跟三原色对应的 子像素作为一个检测单元， 即一个检测单元中至少包括一个完整的像素。 液晶 显示是以像素为基本的显示单位， 每个像素中包括了至少三个子像素， 而在实 际生产中可能会出现某个子像素完全没有显示的情况， 如图 4所示， 现有以子 像素为单元的检测方式是无法识别此类故障的。 因此， 本技术方案至少以一个 像素为单位作为检测单元， 可以检测出像素中单个子像素全无的故障， 进一步 提升拉检成功率。
实施例四
本实施例是对实施例三的进一步改进， 在获取检测单元内各子像素边框影 像的基础上， 增加至少一个子像素的内部影像。 由于子像素内部影像的特征比 较多， 将内部影像加入对比， 可以进一步提升判断的准确性。
实施例五
本发明还公开一种光配向液晶面板光学检测设备， 包括：
用于获取检测单元内部影像的摄像装置；
跟摄像装置耦合、 用于获取光配向液晶面板的一个合格的检测单元的内部 影像， 作为模式影像的建模装置； 以及将待检的检测单元的内部影像跟模式影像进行比对的比较装置。
检测单元为一个子像素也可以是多个子像素的组合。
以单个子像素为检测单元， 建模装置可以获取子像素的内部影像作为模式 影像， 还可以增加边框影像作为模式影像。 子像素作为像素的基本构件， 进行 逐一进行比对， 可以提高单个子像素不良的拦检成功率， 确保合格的成品每个 子像素的完整性， 提升显示品质。
以多个子像素为检测单元（最好是包括一个完整的像素 ), 建模装置可以获 取每个子像素的边框影像作为模式影像， 还可以增加任意一个或多个子像素的 内部影像作为模式影像。 液晶显示是以像素为基本的显示单位， 每个像素中包 括了至少三个子像素， 而在实际生产中可能会出现某个子像素完全没有显示的 情况， 因此， 本技术方案至少以一个像素为单位作为检测单元， 可以检测出像 素中单个子像素全无的故障， 进一步提升拉检成功率。
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、 一种光配向液晶面板光学检测的方法， 包括步骤：
A、预设一个合格的光配向液晶面板的检测单元， 通过摄像装置获取所述检 测单元的内部影像， 然后再通过计算机抽取内部影像的线条特征后重新构图， 形成模式影像； 所述检测单元为一个子像素， 所述模式影像包括所述子像素的 内部影像； 所述模式影像还包括至少一个子像素的边框影像；
B、 以预设的检测单元为单位， 获取待检的光配向液晶面板的检测单元的内 部影像生成待检影像， 通过计算机模糊比较的方法， 将待检的检测单元的内部 影像跟模式影像进行比对， 生成比对结果。
2、 一种光配向液晶面板光学检测的方法， 包括步骤：
A、根据光配向液晶面板的预设的一个合格的检测单元的内部影像生成模式 影像；
B、 以预设的检测单元为单位， 获取待检的光配向液晶面板的检测单元的内 部影像生成待检影像， 跟模式影像进行比对； 生成比对结果。
3、 如权利要求 2所述的一种光配向液晶面板光学检测的方法， 其中， 所述 步骤 A中， 所述检测单元为一个子像素， 所述模式影像包括所述子像素的内部 影像。
4、 如权利要求 3所述的一种光配向液晶面板光学检测的方法， 其中， 所述 模式影像包括至少一个子像素的边框影像。
5、 如权利要求 2所述的一种光配向液晶面板光学检测的方法， 其中， 所述 步骤 A中， 所述检测单元包括至少三个分别跟三原色对应的子像素， 所述模式 影像包括所有子像素的边框影像。
6、 如权利要求 5所述的一种光配向液晶面板光学检测的方法， 其中， 所述 模式影像包括至少一个子像素的内部影像。
7、 如权利要求 2所述的一种光配向液晶面板光学检测的方法， 其中， 所述 步骤 B 中， 通过计算机模糊比较的方法， 将待检的检测单元的内部影像跟模式 影像进行比对， 生成比对结果。
8、 如权利要求 2所述的一种光配向液晶面板光学检测的方法， 其中， 所述 步骤 A中， 先通过摄像装置获取光配向液晶面板合格的检测单元的内部影像， 然后再通过计算机抽取内部影像的线条特征后重新构图， 形成所述模式影像。
9、 一种光配向液晶面板光学检测设备， 包括：
用于获取检测单元内部影像的摄像装置；
跟摄像装置耦合、 记录有光配向液晶面板的一个合格的检测单元的内部影 像生成的模式影像的建模装置；
以及将待检的检测单元的内部影像跟模式影像进行比对的比较装置。
10、 如权利要求 9所述的一种光配向液晶面板光学检测设备， 其中， 所述 检测单元为一个子像素， 所述建模装置获取所述子像素的内部影像作为模式影 像。
11、 如权利要求 9 所述的一种光配向液晶面板光学检测设备， 其中， 所述 检测单元包括至少三个分别跟三原色对应的子像素， 所述建模装置获取所有子 像素的边框影像作为模式影像。
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