WO2014172995A1 - 液晶面板外观检测设备镜头校正的方法及系统 - Google Patents

液晶面板外观检测设备镜头校正的方法及系统 Download PDF

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Publication number
WO2014172995A1
WO2014172995A1 PCT/CN2013/078085 CN2013078085W WO2014172995A1 WO 2014172995 A1 WO2014172995 A1 WO 2014172995A1 CN 2013078085 W CN2013078085 W CN 2013078085W WO 2014172995 A1 WO2014172995 A1 WO 2014172995A1
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Prior art keywords
correction
lens
gray scale
standard
scale data
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French (fr)
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黄海波
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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    • 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

Definitions

  • the present invention relates to the field of liquid crystal display, and in particular to a method and system for correcting lens of a liquid crystal panel appearance detecting device.
  • TFT-LCD Thin Film Transistor Liquid Crystal Display, thin film transistor liquid crystal display
  • TFT-LCD Thin Film Transistor Liquid Crystal Display, thin film transistor liquid crystal display
  • the main electronic products of today's information society such as television, computer, mobile phone, GPS (Global Positioning System), car display, public display, etc.
  • TFT-LCD is a combination of semiconductor technology and liquid crystal display technology; TFT-LCD includes liquid crystal panel and backlight module, and liquid crystal panel is further composed of CF (Color) Filter, color filter) and Arrary (array).
  • the appearance of the liquid crystal panel is detected after many processes, and the deviation of the lens is easily caused after the switching line or the lens of the detecting device is replaced.
  • the current method for solving the deviation caused by the lens is Manually adjust the lens light source or focal length repeatedly. This method causes the workload of the personnel to increase, the process is complicated, and the machine can not be used well to reduce the output of the production line.
  • the main object of the present invention is to provide a lens correction method for a liquid crystal panel appearance detecting device, which aims to perform automatic lens correction on a liquid crystal panel appearance detecting device.
  • the invention also provides a lens correction system for a liquid crystal panel appearance detecting device, which aims to perform automatic lens correction on the liquid crystal panel appearance detecting device.
  • a method for correcting lens of a liquid crystal panel appearance detecting device comprising the steps of: A: taking a liquid crystal panel standard film with normal gray level characteristic value, automatically performing image capturing to obtain standard gray scale data of the standard sheet; Analyze whether it is necessary to start the lens correction; C. When the lens correction needs to be started, the standard slice is automatically imaged to obtain the real-time gray-scale data of the standard slice; D. The deviation between the real-time gray-scale data and the standard gray-scale data is calculated; Correct the lens based on the calculated deviation.
  • the method further comprises: presetting a correction time point; determining whether it is necessary to start the lens correction by analyzing whether the correction time point is reached.
  • the method further comprises: detecting a correction instruction; determining whether the correction needs to be initiated when the correction instruction is detected.
  • the method further includes: presetting a threshold; acquiring the corrected grayscale data on the standard slice after the lens correction; and adopting the acquired grayscale data after the correction and the standard grayscale data. Whether the deviation is greater than a preset threshold; when the deviation between the acquired gray scale data and the standard gray scale data is greater than a preset threshold, the lens correction is continued; when the corrected gray scale data and the standard gray scale are obtained When the deviation of the data is not greater than the preset threshold, the lens correction is ended.
  • the manner of correcting the lens is: adjusting the light source or the focal length of the lens.
  • a system for correcting a lens of a liquid crystal panel appearance detecting device comprising: a standard establishing module, configured to automatically take a standard image to obtain a standard gray of a standard film after taking a liquid crystal panel standard piece with a normal gray value characteristic value Level data; correction analysis module, used to analyze whether it is necessary to start lens correction, when the lens correction needs to be started, the standard film is automatically imaged to obtain real-time gray scale data of the standard slice, and the real-time gray scale data and the standard gray scale data are calculated. Deviation; a correction processing module for correcting the lens based on the calculated deviation.
  • the correction analysis module is further configured to: preset a correction time point; determine whether it is necessary to start the lens correction by analyzing whether the correction time point is reached.
  • the calibration analysis module is further configured to: detect a correction instruction; and determine whether the correction needs to be initiated when the correction instruction is detected.
  • the correction analysis module is further configured to: preset a threshold; obtain corrected grayscale data for the standard slice after the lens correction; and pass the acquired corrected grayscale data and standard grayscale data Whether the deviation is greater than the preset threshold; when the deviation of the acquired grayscale data from the standard grayscale data is greater than the preset threshold, the lens correction is continued; when the corrected grayscale data and the standard gray are obtained When the deviation of the order data is not greater than the preset threshold, the lens correction is ended.
  • the correction processing module corrects the lens by adjusting the light source or the focal length of the lens.
  • the invention establishes the standard gray scale data of the standard film of the liquid crystal panel, finds the deviation from the gray scale real-time data based on the established standard data, and further corrects the lens of the liquid crystal panel appearance detecting device, thereby effectively reducing the The deviation of the lens caused by the change of the production line switching line, the detection platform, and the lens light source, and the automatic correction of the time point to achieve automatic correction of the lens, thereby improving the utilization rate of the machine and the production capacity of the production line.
  • FIG. 1 is a specific flowchart of a first embodiment of a method for correcting a lens of an appearance detecting device for a liquid crystal panel according to the present invention
  • FIG. 2 is a specific flowchart of a second embodiment of a lens correction method for a liquid crystal panel appearance detecting device according to the present invention
  • FIG. 3 is a structural diagram of a preferred embodiment of a system for correcting a lens of an appearance detecting device for a liquid crystal panel according to the present invention
  • FIG. 4 is a functional block diagram of the lens corrected system of FIG.
  • FIG. 1 is a flowchart showing a specific implementation of a first embodiment of a method for correcting a lens of an appearance detecting device for a liquid crystal panel according to the present invention.
  • step S11 after taking the standard panel of the liquid crystal panel with the normal grayscale characteristic value, the image is automatically taken to obtain the standard grayscale data of the standard patch.
  • the standard panel of the liquid crystal panel takes two pieces, one piece as a calibration standard piece and the other piece as a secondary confirmation standard piece or a spare standard piece.
  • one piece of the liquid crystal panel standard piece is taken, or three or more pieces are taken to prevent replacement when necessary.
  • step S12 it is analyzed whether it is necessary to start lens correction.
  • the correction time point is preset, and it is determined whether the lens correction needs to be started by analyzing whether the correction time point is reached, and when the preset correction time point is reached, the lens correction is started; when the preset correction time point is not reached When the lens correction is not activated.
  • the normal liquid crystal substrate is detected.
  • the detected command may be a correction command when the preset correction time point is reached, or may be a correction instruction issued by the user according to the need, for example, when the liquid crystal panel production line switching line replaces the detection device detection platform.
  • the correction command issued may also be a correction command issued when the lens source is replaced.
  • the standard slice is automatically imaged to obtain real-time grayscale data of the standard slice.
  • the gray scale of the standard slice is calculated by automatically capturing the standard slice and binarizing the acquired image.
  • the binarization of the image is: setting a threshold T, and dividing the data of the image into two parts by T: a pixel group larger than T and a pixel group smaller than T.
  • the pixel value of the pixel group larger than T is set to white (or black), and the pixel value of the pixel group smaller than T is set to black (or white).
  • step S14 the deviation between the real gray scale data and the standard gray scale data is calculated.
  • step S15 the lens is corrected according to the calculated deviation.
  • the lens when there is a deviation between the real gray scale data and the standard gray scale data, the lens is corrected according to the calculated deviation.
  • a threshold is preset; after the lens correction, the grayscale data after the correction is acquired for the standard slice; and by the deviation of the acquired grayscale data after the correction from the standard grayscale data, If the deviation between the obtained grayscale data after the correction and the standard grayscale data is greater than the preset threshold, returning to step S13 to obtain the real grayscale data of the standard slice to continue the lens correction; or after obtaining the corrected
  • the lens correction is ended when the deviation of the gray scale data from the standard gray scale data is not greater than the preset threshold.
  • the invention establishes the standard gray scale data of the standard piece of the liquid crystal panel, finds the deviation from the gray scale real-time data based on the established standard data, thereby realizing the correction of the liquid crystal panel appearance detecting device lens, and effectively reducing the production line switching line.
  • FIG. 2 is a specific flowchart of a second embodiment of a method for correcting lens of a liquid crystal panel appearance detecting device according to the present invention.
  • the first embodiment of the method based on the lens correction described above, the embodiment further includes after step S15:
  • Step S16 preset a threshold; after the lens correction, obtain the gray scale data after the correction for the standard slice; and determine whether the deviation between the acquired gray scale data and the standard gray scale data is greater than a preset threshold
  • the deviation of the acquired gray scale data and the standard gray scale data is greater than the preset threshold, returning to step S13 to obtain the real gray scale data of the standard slice to continue the lens correction; or obtaining the corrected gray scale data and The lens correction is ended when the deviation of the standard gray scale data is not greater than the preset threshold.
  • the corrected real-time gray-scale data is obtained again for the standard slice, and the corrected real-time gray-scale data is compared with the standard gray-scale data to calculate a deviation and compared with a preset threshold.
  • the lens is fully offset corrected, and the correction is more accurate.
  • FIG. 3 is a structural diagram of a preferred embodiment of a lens correction system for a liquid crystal panel appearance detecting device according to the present invention.
  • the lens corrected system 12 operates in the detection device 1.
  • the detecting device 1 includes a lens 11, a storage unit 13, a display unit 14, and a processing unit 15.
  • the detecting device 1 takes a picture of the liquid crystal panel through the lens 11 and binarizes the acquired image to calculate a gray scale characteristic value of the liquid crystal panel.
  • the binarization of the image is: setting a threshold T, and dividing the data of the image into two parts by T: a pixel group larger than T and a pixel group smaller than T.
  • the pixel value of the pixel group larger than T is set to white (or black), and the pixel value of the pixel group smaller than T is set to black (or white).
  • the detecting device may be a liquid crystal panel micro defect detecting machine, or may be PSH (Photo Spacer Height, gap particle height) detector, can also be any other liquid crystal panel inspection device with detection lens.
  • the storage unit 13 is used to store the lens correction system 12 and its operational data.
  • the storage unit 13 is also used to store acquired image data of the lens 11.
  • the display unit 14 is configured to provide a human-computer interaction interface for the user to input an instruction, and output response data of the detection device 1 to the user instruction.
  • the human-machine interaction interface includes, but is not limited to, an operation interface of the lens 11 and an operation interface of the lens correction system 12.
  • the processing unit 15 calls and executes the lens correction system 12 to implement automatic correction of the liquid crystal panel appearance detecting device lens.
  • the lens correction system 12 includes a standard establishment module 121, a correction analysis module 122, and a correction processing module 123.
  • the standard establishing module 121 is configured to automatically take a standard image to obtain standard grayscale data of the standard slice after taking the liquid crystal panel standard piece with the normal gray value characteristic value.
  • the standard panel of the liquid crystal panel takes two pieces, one piece as a calibration standard piece and the other piece as a secondary confirmation standard piece or a spare standard piece.
  • one piece of the liquid crystal panel standard piece is taken, or three or more pieces are taken to prevent replacement when necessary.
  • the calibration analysis module 122 is configured to analyze whether the lens correction needs to be started.
  • the standard slice is automatically imaged to obtain the real-time grayscale data of the standard slice, and the deviation between the real grayscale data and the standard grayscale data is calculated. .
  • the gray scale of the standard slice is calculated by automatically taking the standard slice and binarizing the obtained image.
  • the binarization of the image is: setting a threshold T, and dividing the data of the image into two parts by T: a pixel group larger than T and a pixel group smaller than T.
  • the pixel value of the pixel group larger than T is set to white (or black), and the pixel value of the pixel group smaller than T is set to black (or white).
  • the calibration analysis module 122 presets the correction time point, determines whether it is necessary to start the lens correction by analyzing whether the correction time point is reached, and starts the lens correction when the preset correction time point is reached; or when the preset is not reached. Lens correction is not activated when the time point is corrected. Detecting a correction command, when detecting a correction command, determining whether it is necessary to start the correction; the detected command may be a correction instruction when the preset correction time point is reached, or may be, the user releases the request according to the need
  • the correction command may be, for example, a correction command issued when the liquid crystal panel line switching line replaces the detection device detection platform, or may be a correction command issued when the lens source is replaced.
  • the correction processing module 123 is configured to correct the lens according to the calculated deviation.
  • the lens when there is a deviation between the real gray scale data and the standard gray scale data, the lens is corrected according to the calculated deviation.
  • a threshold is preset; after the lens correction, the grayscale data after the correction is acquired for the standard slice; and by the deviation of the acquired grayscale data after the correction from the standard grayscale data, If the deviation between the obtained grayscale data after the correction and the standard grayscale data is greater than the preset threshold, returning to step S13 to obtain the real grayscale data of the standard slice to continue the lens correction; or after obtaining the corrected
  • the lens correction is ended when the deviation of the gray scale data from the standard gray scale data is not greater than the preset threshold.
  • the invention establishes the standard gray scale data of the standard piece of the liquid crystal panel, finds the deviation from the gray scale real-time data based on the established standard data, thereby realizing the correction of the liquid crystal panel appearance detecting device lens, and effectively reducing the production line switching line.

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Abstract

公开了一种液晶面板外观检测设备镜头校正方法及系统，通过建立液晶面板的标准片的标准灰阶数据，基于建立的标准数据找出与灰阶即时数据的偏差，进而实现对液晶面板外观检测设备镜头的校正，有效减少了因产线切换线、检测平台、镜头灯源的改变而造成的镜头偏差，同时通过设置自动校正时间点，实现对镜头的自动校正，提高了机台利用率和产线产能。

Description

液晶面板外观检测设备镜头校正的方法及系统
技术领域
本发明涉及到液晶显示领域，特别涉及到一种液晶面板外观检测设备镜头校正的方法及系统。
背景技术
TFT-LCD(Thin Film Transistor Liquid Crystal Display，薄膜晶体管液晶显示器)因其体积薄、重量轻、画面质量优异、功耗低、寿命长、数字化和无辐射等优点在各种大、中、小的产品上得到广泛应用，几乎涵盖了当今信息社会的主要电子产品，例如，电视、电脑、手机、GPS（全球定位系统）、车载显示、公共显示等。TFT-LCD是半导体技术和液晶显示技术相结合的产物；TFT-LCD包括液晶面板和背光模组，而液晶面板又是由CF（Color Filter，彩色滤光片）和Arrary（阵列）组成。在TFT-LCD的制作过程中有很多工序之后都会对液晶面板的外观进行检测，而在切换线或者检测设备镜头进行更换之后容易造成镜头的偏差，目前来解决这种镜头造成的偏差的方法为手动对镜头灯源或者焦距进行反复调整，这种方法造成人员工作量增加，工序繁杂，同时不能很好的利用机台降低了产线的产量。
发明内容
本发明的主要目的为提供一种液晶面板外观检测设备镜头校正的方法，旨在对液晶面板外观检测设备进行镜头自动校正。
本发明还提供一种液晶面板外观检测设备镜头校正的系统，旨在对液晶面板外观检测设备进行镜头自动校正。
一种液晶面板外观检测设备镜头校正的方法，该方法包括：该方法包括步骤：A、取灰度特性值正常的液晶面板标准片，自动进行取像以获取标准片的标准灰阶数据；B、分析是否需要启动镜头校正；C、在需要启动镜头校正时，对标准片自动进行取像以获得标准片的即时灰阶数据；D、计算即时灰阶数据与标准灰阶数据的偏差；E、根据计算的偏差对镜头进行校正。
优选地，该方法还包括：预设校正时间点；通过分析是否到校正时间点来判断是否需要启动镜头校正。
优选地，所述方法还进一步包括：侦测校正指令；在侦测到校正指令时判断是否需要启动校正。
优选地，所述步骤E之后还包括：预设一阀值；在镜头校正之后再对标准片获取校正之后的灰阶数据；并通过将获取的校正之后的灰阶数据与标准灰阶数据的偏差，是否大于预设阀值；当获取的校正之后的灰阶数据与标准灰阶数据的偏差大于预设阀值时，继续进行镜头校正；当获取的校正之后的灰阶数据与标准灰阶数据的偏差不大于预设阀值时，结束镜头校正。
优选地，所述对镜头进行校正的方式为：对镜头的光源或者焦距进行调整。
一种液晶面板外观检测设备镜头校正的系统，该系统包括：标准建立模块，用于在取灰度特性值正常的液晶面板标准片后，对标准片自动进行取像以获得标准片的标准灰阶数据；校正分析模块，用于分析是否需要启动镜头校正，在需要启动镜头校正时，对标准片自动进行取像以获得标准片的即时灰阶数据，计算即时灰阶数据与标准灰阶数据的偏差；校正处理模块，用于根据计算的偏差对镜头进行校正。
优选地，该校正分析模块还用于：预设校正时间点；通过分析是否到校正时间点来判断是否需要启动镜头校正。
优选地，校正分析模块还用于：侦测校正指令；在侦测到校正指令时判断是否需要启动校正。
优选地，该校正分析模块还进一步用于：预设一阀值；在镜头校正之后再对标准片获取校正之后的灰阶数据；并通过将获取的校正之后的灰阶数据与标准灰阶数据的偏差，是否大于预设阀值；当获取的校正之后的灰阶数据与标准灰阶数据的偏差大于预设阀值时，继续进行镜头校正；当获取的校正之后的灰阶数据与标准灰阶数据的偏差不大于预设阀值时，结束镜头校正。
优选地，所述校正处理模块对镜头进行校正的方式为：对镜头的光源或者焦距进行调整。
相对现有技术，本发明通过建立液晶面板的标准片的标准灰阶数据，基于建立的标准数据找出与灰阶即时数据的偏差，进而实现对液晶面板外观检测设备镜头的校正，有效减少了因产线切换线、检测平台、镜头灯源的改变而造成的镜头的偏差，同时通过设置自动校正时间点，实现镜头的自动校正，提高了机台利用率和产线产能。
附图说明
图1为本发明液晶面板外观检测设备镜头校正的方法第一实施例的具体流程图；
图2为本发明液晶面板外观检测设备镜头校正的方法第二实施例的具体流程图；
图3为本发明液晶面板外观检测设备镜头校正的系统较佳实施例运行的架构图；
图4为图3中镜头校正的系统的功能模块图。
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
如图1所示，为本发明液晶面板外观检测设备镜头校正方法的第一实施例具体实施流程图。
需要强调的是：图1所示流程图仅为一个较佳实施例，本领域的技术人员当知，任何围绕本发明思想构建的实施例都不应脱离于如下技术方案涵盖的范围：
取灰阶特性值正常的液晶面板标准片，自动进行取像以获得标准片的标准灰阶数据；分析是否需要启动镜头校正；在需要启动镜头校正时，对标准片自动进行取像以获得标准片的即时灰阶数据；计算即时灰阶数据与标准灰阶数据的偏差；根据计算的偏差对镜头进行校正。
以下是本实施例逐步实现对液晶面板检测镜头进行校正的具体步骤：
步骤S11，在取灰阶特性值正常的液晶面板标准片后，自动进行取像以获得标准片的标准灰阶数据。在本实施例中，液晶面板标准片取2块，一片作为校正标准片，另一片作为二次确认标准片或备用标准片。在本发明的其他实施例中，液晶面板标准片取1片，或者取3片以上以防后续有需要时更换。
步骤S12，分析是否需要启动镜头校正。当需要启动镜头校正时，执行下述步骤S13，或当不需要启动镜头校正时，结束流程。在本实施例中，预设校正时间点，通过分析是否到校正时间点来判断是否需要启动镜头校正，当到预设的校正时间点时，启动镜头校正；当未到预设的校正时间点时，不启动镜头校正。侦测校正指令，当侦测到校正指令时，判断是否需要启动校正；当需要启动校正时，对标准片自动进行取像获得标准片的即时灰阶数据，当不需要启动补正时，继续对正常液晶基板进行检测。所述侦测到的指令可以是当到预设的校正时间点时的校正指令，还可以是，用户根据需要下达的校正指令，例如可以是在液晶面板产线切换线更换检测设备检测平台时下达的校正指令，也可以是在更换镜头的灯源时下达的校正指令。
步骤S13，对标准片自动进行取像以获得标准片的即时灰阶数据。在本实施例中，通过将对标准片自动进行取像，并将取得的图像进行二值化计算出标准片的灰阶。所述对图像的二值化为：设定一个阈值T，用T将图像的数据分成两部分：大于T的像素群和小于T的像素群。将大于T的像素群的像素值设定为白色（或者黑色），小于T的像素群的像素值设定为黑色（或者白色）。
步骤S14，计算即时灰阶数据与标准灰阶数据的偏差。
步骤S15，根据计算的偏差对镜头进行校正。在本实施例中，当即时灰阶数据与标准灰阶数据存在偏差时，根据计算的偏差对镜头进行校正。在本发明其他实施例中，预设一阀值；在镜头校正之后再对标准片获取校正之后的灰阶数据；并通过将获取的校正之后的灰阶数据与标准灰阶数据的偏差，是否大于预设阀值；当获取的校正之后的灰阶数据与标准灰阶数据的偏差大于预设阀值时，返回步骤S13获取标准片的即时灰阶数据继续进行镜头校正；或获取的校正之后的灰阶数据与标准灰阶数据的偏差不大于预设阀值时，结束镜头校正。
本发明通过建立液晶面板的标准片的标准灰阶数据，基于建立的标准数据找出与灰阶即时数据的偏差，进而实现对液晶面板外观检测设备镜头的校正，有效减少了因产线切换线、检测平台、镜头灯源的改变而造成的镜头的偏差，同时通过设置自动校正时间点，实现镜头的自动校正，提高了机台利用率和产线产能。
如图2所示，为本发明液晶面板外观检测设备镜头校正的方法第二实施例的具体流程图。
基于上述镜头校正的方法第一实施例，本实施例在步骤S15之后还包括：
步骤S16，预设一阀值；在镜头校正之后再对标准片获取校正之后的灰阶数据；并通过将获取的校正之后的灰阶数据与标准灰阶数据的偏差，是否大于预设阀值；当获取的校正之后的灰阶数据与标准灰阶数据的偏差大于预设阀值时，返回步骤S13获取标准片的即时灰阶数据继续进行镜头校正；或获取的校正之后的灰阶数据与标准灰阶数据的偏差不大于预设阀值时，结束镜头校正。
本实施例通过对校正后的镜头，再次对标准片获取校正后的即时灰阶数据，并将校正后的即时灰阶数据与标准灰阶数据进行比较计算出偏差并与预设阀值比较，使得镜头充分进行偏差校正，校正的更加准确。
如图3所示，为本发明液晶面板外观检测设备镜头校正系统较佳实施例运行的架构图。该镜头校正的系统12运行于检测设备1中。该检测设备1包括：镜头11、存储单元13、显示单元14、处理单元15。该检测设备1通过镜头11对液晶面板进行取像，并将获取的图像进行二值化计算出液晶面板的灰阶特性值。所述对图像的二值化为：设定一个阈值T，用T将图像的数据分成两部分：大于T的像素群和小于T的像素群。将大于T的像素群的像素值设定为白色（或者黑色），小于T的像素群的像素值设定为黑色（或者白色）。所述检测设备可以是液晶面板微观缺陷检测机，也可以是PSH（Photo spacer Height，间隙粒子高度）检测机，还可以是其他任意具有检测镜头的液晶面板检测设备。
该存储单元13用于存储该镜头校正系统12及其运行数据。
该存储单元13还用于存储镜头11的获取的图像数据。
该显示单元14，用于提供人机交互界面，以供用户输入指令，且输出检测设备1对用户指令的响应数据。在本实施例中，该人机交互界面包括，但不限于，镜头11的操作界面及镜头校正系统12的操作界面。
该处理单元15，调用并执行该镜头校正系统12，以实现对液晶面板外观检测设备镜头的自动校正。
如图4所示，为图3中镜头校正系统的功能模块图。该镜头校正系统12包括标准建立模块121、校正分析模块122、校正处理模块123。
标准建立模块121，用于在取灰度特性值正常的液晶面板标准片后，对标准片自动进行取像以获得标准片的标准灰阶数据。在本实施例中，液晶面板标准片取2块，一片作为校正标准片，另一片作为二次确认标准片或备用标准片。在本发明的其他实施例中，液晶面板标准片取1片，或者取3片以上以防后续有需要时更换。
校正分析模块122，用于分析是否需要启动镜头校正，在需要启动镜头校正时，对标准片自动进行取像以获得标准片的即时灰阶数据，计算即时灰阶数据与标准灰阶数据的偏差。通过将对标准片自动进行取像，并将取得的图像进行二值化计算出标准片的灰阶。所述对图像的二值化为：设定一个阈值T，用T将图像的数据分成两部分：大于T的像素群和小于T的像素群。将大于T的像素群的像素值设定为白色（或者黑色），小于T的像素群的像素值设定为黑色（或者白色）。
具体的，校正分析模块122，预设校正时间点，通过分析是否到校正时间点来判断是否需要启动镜头校正，当到预设的校正时间点时，启动镜头校正；或当未到预设的校正时间点时，不启动镜头校正。侦测校正指令，当侦测到校正指令时，判断是否需要启动校正；所述侦测到的指令可以是当到预设的校正时间点时的校正指令，还可以是，用户根据需要下达的校正指令，例如可以是在液晶面板产线切换线更换检测设备检测平台时下达的校正指令，也可以是在更换镜头的灯源时下达的校正指令。
校正处理模块123，用于根据计算的偏差对镜头进行校正。
在本实施例中，当即时灰阶数据与标准灰阶数据存在偏差时，根据计算的偏差对镜头进行校正。在本发明其他实施例中，预设一阀值；在镜头校正之后再对标准片获取校正之后的灰阶数据；并通过将获取的校正之后的灰阶数据与标准灰阶数据的偏差，是否大于预设阀值；当获取的校正之后的灰阶数据与标准灰阶数据的偏差大于预设阀值时，返回步骤S13获取标准片的即时灰阶数据继续进行镜头校正；或获取的校正之后的灰阶数据与标准灰阶数据的偏差不大于预设阀值时，结束镜头校正。
本发明通过建立液晶面板的标准片的标准灰阶数据，基于建立的标准数据找出与灰阶即时数据的偏差，进而实现对液晶面板外观检测设备镜头的校正，有效减少了因产线切换线、检测平台、镜头灯源的改变而造成的镜头的偏差，同时通过设置自动校正时间点，实现镜头的自动校正，提高了机台利用率和产线产能。
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (18)

  1. 一种液晶面板外观检测设备镜头校正的方法，其特征在于，该方法包括步骤：
    A、取灰阶特性值正常的液晶面板标准片,自动进行取像以获取标准片的标准灰阶数据；
    B、分析是否需要启动镜头校正；
    C、在需要启动镜头校正时，对标准片自动进行取像以获得标准片的即时灰阶数据；
    D、计算即时灰阶数据与标准灰阶数据的偏差；
    E、根据计算的偏差对镜头进行校正。
  2. 根据权利要求1所述的镜头校正的方法，其特征在于，该方法还包括：
    预设校正时间点；
    通过分析是否到预设的校正时间点来判断是否需要启动镜头校正。
  3. 根据权利要求2所述的镜头校正的方法，其特征在于，所述步骤E之后还包括：
    预设一阀值；在镜头校正之后再对标准片获取校正之后的灰阶数据；
    并通过将获取的校正之后的灰阶数据与标准灰阶数据的偏差，是否大于预设阀值；
    当获取的校正之后的灰阶数据与标准灰阶数据的偏差大于预设阀值时，继续进行镜头校正；当获取的校正之后的灰阶数据与标准灰阶数据的偏差不大于预设阀值时，结束镜头校正。
  4. 根据权利要求3所述的镜头校正的方法，其特征在于，所述对镜头进行校正的方式为：对镜头的光源或焦距进行调整。
  5. 根据权利要求1所述的镜头校正的方法，其特征在于，所述方法还进一步包括：
    侦测校正指令；
    在侦测到校正指令时判断是否需要启动校正。
  6. 根据权利要求5所述的镜头校正的方法，其特征在于，所述步骤E之后还包括：
    预设一阀值；在镜头校正之后再对标准片获取校正之后的灰阶数据；
    并通过将获取的校正之后的灰阶数据与标准灰阶数据的偏差，是否大于预设阀值；
    当获取的校正之后的灰阶数据与标准灰阶数据的偏差大于预设阀值时，继续进行镜头校正；当获取的校正之后的灰阶数据与标准灰阶数据的偏差不大于预设阀值时，结束镜头校正。
  7. 根据权利要求6所述的镜头校正的方法，其特征在于，所述对镜头进行校正的方式为：对镜头的光源或焦距进行调整。
  8. 根据权利要求1所述的镜头校正的方法，其特征在于，所述步骤E之后还包括：
    预设一阀值；在镜头校正之后再对标准片获取校正之后的灰阶数据；
    并通过将获取的校正之后的灰阶数据与标准灰阶数据的偏差，是否大于预设阀值；
    当获取的校正之后的灰阶数据与标准灰阶数据的偏差大于预设阀值时，继续进行镜头校正；当获取的校正之后的灰阶数据与标准灰阶数据的偏差不大于预设阀值时，结束镜头校正。
  9. 根据权利要求8所述的镜头校正的方法，其特征在于，所述对镜头进行校正的方式为：对镜头的光源或焦距进行调整。
  10. 一种液晶面板外观检测设备镜头校正的系统，其特征在于，该系统包括：
    标准建立模块，在取灰阶特性值正常的液晶面板标准片后，对标准片自动进行取像以获取标准片的标准灰阶数据；
    校正分析模块，分析是否需要启动镜头校正，在需要启动镜头校正时，对标准片自动进行取像以获取标准片的即时灰阶数据，计算即时灰阶数据与标准灰阶数据的偏差；
    校正处理模块，根据计算的偏差对镜头进行校正。
  11. 根据权利要求10所述的镜头校正的系统，其特征在于，该校正分析模块还用于：
    预设校正时间点；
    通过分析是否到校正时间点来判断是否需要启动镜头校正。
  12. 根据权利要求11所述的镜头校正的系统，其特征在于，该校正分析模块还进一步用于：
    预设一阀值；在镜头校正之后再对标准片获取校正之后的灰阶数据；
    并通过将获取的校正之后的灰阶数据与标准灰阶数据的偏差，是否大于预设阀值；
    当获取的校正之后的灰阶数据与标准灰阶数据的偏差大于预设阀值时，继续进行镜头校正；当获取的校正之后的灰阶数据与标准灰阶数据的偏差不大于预设阀值时，结束镜头校正。
  13. 根据权利要求12所述的镜头校正的系统，其特征在于，所述校正处理模块对镜头进行校正的方式为：对镜头的光源或焦距进行调整。
  14. 根据权利要求10所述的镜头校正的系统，其特征在于，该校正分析模块还用于：
    侦测校正指令；
    在侦测到校正指令时判断是否需要启动校正。
  15. 根据权利要求14所述的镜头校正的系统，其特征在于，该校正分析模块还进一步用于：
    预设一阀值；在镜头校正之后再对标准片获取校正之后的灰阶数据；
    并通过将获取的校正之后的灰阶数据与标准灰阶数据的偏差，是否大于预设阀值；
    当获取的校正之后的灰阶数据与标准灰阶数据的偏差大于预设阀值时，继续进行镜头校正；当获取的校正之后的灰阶数据与标准灰阶数据的偏差不大于预设阀值时，结束镜头校正。
  16. 根据权利要求15所述的镜头校正的系统，其特征在于，所述校正处理模块对镜头进行校正的方式为：对镜头的光源或焦距进行调整。
  17. 根据权利要求10所述的镜头校正的系统，其特征在于，该校正分析模块还进一步用于：
    预设一阀值；在镜头校正之后再对标准片获取校正之后的灰阶数据；
    并通过将获取的校正之后的灰阶数据与标准灰阶数据的偏差，是否大于预设阀值；
    当获取的校正之后的灰阶数据与标准灰阶数据的偏差大于预设阀值时，继续进行镜头校正；当获取的校正之后的灰阶数据与标准灰阶数据的偏差不大于预设阀值时，结束镜头校正。
  18. 根据权利要求17所述的镜头校正的系统，其特征在于，所述校正处理模块对镜头进行校正的方式为：对镜头的光源或焦距进行调整。
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