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    • 2. 发明申请
    • SUBSTRATE TESTING CIRCUIT
    • 基板测试电路
    • US20090146678A1
    • 2009-06-11
    • US12126307
    • 2008-05-23
    • Yupeng CHENZhenhuan TIANKiyoung KWON
    • Yupeng CHENZhenhuan TIANKiyoung KWON
    • G01R31/26
    • G09G3/006G09G3/3648G09G2300/04
    • The present invention relates to a substrate testing circuit comprising a testing bus and a testing signal terminal connected to the testing bus, a signal line to be tested in the substrate being connected to the testing bus via a signal connecting terminal, wherein a plurality of signal access terminals are provided on the testing bus; one testing branch is connected between each the signal access terminal and the testing signal terminal; and resistance values of the testing branches are the same. By means of the present invention, since a plurality of signal access terminals are introduced and the testing branches with the same resistance are added so that input resistances and impedances of testing signals across the display screen are substantially identical without making changes to process flow and device hardware structure, input resistances and impedances of respective signal lines are well averaged, thereby no obvious regional attenuation occurs in the testing signals within the pixel area to be tested irrespective of limitation in size of panel, so as to realize tests for panels with greater sizes.
    • 本发明涉及一种基板测试电路,包括测试总线和连接到测试总线的测试信号端子,待测试的信号线通过信号连接端连接到测试总线,其中多个信号 接入终端设在测试总线上; 每个信号接入终端和测试信号终端之间连接一个测试分支; 测试分支的电阻值相同。 通过本发明,由于引入了多个信号接入终端,并且添加了具有相同电阻的测试分支,使得跨越显示屏的测试信号的输入电阻和阻抗基本相同,而不改变处理流程和设备 各个信号线的硬件结构,输入电阻和阻抗都很好地平均,因此,无论面板的尺寸受到限制,在待测像素区域内的测试信号中都不会出现明显的区域衰减,从而实现更大尺寸的面板的测试 。