LCD inspection method and the LCD survey instrument by pattern comparison

摘要

(57) Abstract This invention liquid crystal display (LCD) has disclosed the method and the device of the vision inspection where business is automated. Picture defect as the LCD panel indicates the picture which is indicated by the LCD panel which is in the midst of inspecting, is detected by comparing with the templet picture which is supposed. The LCD panel 10 which is in the midst of inspecting is loosely placed on inspection platform 16. Inspection algorithm as generated 2 dimensional picture of the pattern which appears on LCD panel 10, revises the attitude of the object and the action of the picture distance. In order next, for two patterns to obtain the error picture, subtraction it is done. And, from the error picture, it is appraised because pattern mismatch detects LCD defect in each pixel position.