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    • 71. 发明授权
    • LCD panel test apparatus having means for correcting data difference
among test apparatuses
    • 具有用于校正测试装置之间的数据差异的装置的LCD面板测试装置
    • US5793221A
    • 1998-08-11
    • US650428
    • 1996-05-20
    • Hiroyuki Aoki
    • Hiroyuki Aoki
    • G02F1/13G01R31/22
    • G02F1/1309
    • An LCD panel test apparatus for testing an LCD panel and compensating the differences in absolute values of measured data among two or more test apparatuses. The test apparatus includes: a backlight to illuminate the LCD panel under test; a CCD camera having a charge coupled device (CCD) sensor to monitor light signals; a filter to allow a predetermined color of light to pass therethrough; an LCD panel driver which provides a drive signal to the LCD panel under test; an analog-to-digital converter which converts the measured data from the CCD camera to digital data; a CCD address defining part which specifies positions of pixels in the CCD sensor corresponding to pixels of the LCD panel under test and specifies CCD sampling addresses for overall LCD pixels; an image data reproducing part to determine data corresponding to each pixel of the LCD panel under test based on the CCD sampling addresses; a defect determining part which determines defective pixels of the LCD panel under test; a correction table which stores correction coefficients; an image compensation part which compensates differences in measured data between two or more LCD panel test apparatuses using the correction coefficients; and a controller for controlling an overall operation of the LCD panel test apparatus.
    • 一种用于测试LCD面板并补偿两个或更多个测试装置之间的测量数据的绝对值的差异的LCD面板测试装置。 测试装置包括:用于照亮被测液晶面板的背光; 具有用于监测光信号的电荷耦合器件(CCD)传感器的CCD照相机; 使预定颜色的光通过的过滤器; 液晶显示面板驱动器,向待测液晶显示面板提供驱动信号; 将来自CCD摄像机的测量数据转换成数字数据的模拟 - 数字转换器; CCD地址限定部分,其指定CCD传感器中对应于待测LCD面板的像素的位置的位置,并指定用于整个LCD像素的CCD采样地址; 图像数据再现部分,用于基于CCD采样地址来确定对应于正在测试的LCD面板的每个像素的数据; 确定待测液晶面板的缺陷像素的缺陷确定部分; 校正表,其存储校正系数; 图像补偿部,其使用所述校正系数补偿两个以上的LCD面板测试装置之间的测量数据的差异; 以及用于控制LCD面板测试装置的整体操作的控制器。
    • 72. 发明授权
    • LCD panel image quality inspection system and LCD image presampling
method
    • LCD面板图像质量检测系统和LCD图像预采样方法
    • US5650844A
    • 1997-07-22
    • US502578
    • 1995-07-14
    • Hiroyuki AokiYoshihisa Matsumura
    • Hiroyuki AokiYoshihisa Matsumura
    • G01N21/88G01M11/00G01N21/93G02F1/13H04N17/04G01N21/00
    • H04N17/04
    • The contrast of an LCD panel is accurately measured with a small number of CCD pixels when measuring the LCD panel using a CCD camera. Therefore, a CCD area sensor is used in the CCD camera in this invention. An LCD driver section displays a calibration pattern or test patterns on the LCD panel to be inspected. An image measuring section performs A/D conversion on the contrast detected by the CCD pixels, and a CCD address setting means of the LCD pixels specifies the positions of the LCD pixels and the positions of the corresponding CCD pixels using luminescent spots of a calibration pattern. The address setting means determines the sampling addresses of each of the LCD pixels from the addresses of the luminescent spots using real number calculations. A presampling processing means converts the measured image to an image with the same number of pixels as the pattern on the LCD panel by means of linear interpolation.
    • 当使用CCD相机测量LCD面板时,使用少量CCD像素精确测量LCD面板的对比度。 因此,在本发明的CCD摄像机中使用CCD区域传感器。 LCD驱动器部分将在要检查的LCD面板上显示校准图案或测试图案。 图像测量部分对由CCD像素检测的对比度执行A / D转换,并且LCD像素的CCD地址设置装置使用校准图案的发光点指定LCD像素的位置和相应的CCD像素的位置 。 地址设置装置使用实数计算从发光点的地址确定每个LCD像素的采样地址。 预采样处理装置通过线性插值将所测量的图像转换为具有与LCD面板上的图案相同数量的像素的图像。