CHECK DEVICE OF CRT DISPLAY PICTURE

摘要

PURPOSE:To improve the check efficiency by using an identical test pattern to plural kinds of check items. CONSTITUTION:The test pattern generated by a test pattern generator 4 is displayed on a CRT display device 1. A controller 5 controls an observed position and an observed visual field to a display pattern of the CRT display device 1 and observes a prescribed pattern while keeping the pattern within the visual field depending on the check items. The observed picture observed individually is stored once in a buffer and measurement and calculation are conducted to each check item. The result of each calculation and the check reference value at a discriminating section is compared to discriminate.