Patent ID: 6630840
Filing Date: 2003-10-07
Classification: G09G

Abstract:
An array substrate inspection method of inspecting an array substrate which comprises: a plurality of signal lines; a plurality of scan lines intersecting with the plurality of signal lines; a picture element electrode formed on each intersection of the signal lines and the scan lines; a supplemental capacitor electrically connected to each picture element electrode; a switching element through which the signal line is electrically connected to the corresponding picture element electrode in order to write an image signal supplied through the corresponding signal line to the picture element electrode and the supplemental capacitor based on a gate signal supplied through the corresponding scan line; a video bus through which the image signal is transferred; a signal line driving circuit having analogue switches and a control circuit for controlling ON/OFF operation of the analogue switches, each analogue switch supplying the image signal on the video bus to the signal line by electrically conducting the video bus to the corresponding signal line; and a scan line driving circuit supplying the gate signal to the scan lines,wherein the array substrate inspection method repeats an inspection step desired times, and each inspection step comprises: writing a test signal supplied on the video bus to the supplemental capacitor by entering the analogue switch into a conductive stated based on a selection signal; storing the test signal written in the supplemental capacitor during a desired time period by entering the analogue switch into a non-conductive state by a non-selection signal of a desired voltage which is different in each inspection step; and reading the test signal from the supplemental capacitor through the corresponding signal line.