LUMINANCE CHARACTERISTIC MEASUREMENT INSTRUMENT FOR CRT

摘要

PROBLEM TO BE SOLVED: To measure the luminance characteristic of a CRT with high accuracy at a high speed.;SOLUTION: A data fetch control section 2 of this luminance characteristic measurement instrument changes the raster size to display a test pattern, consisting of a plurality of longitudinal or lateral stripes generated by a signal generator 4 onto a color CRT 6, in a way such that relative positions of phosphors in each stripe differs from each other. The image of this test pattern is picked up by a CCD camera 3 and the data fetch control section 2 fetches the picked-up image. The emission position and the luminance level of each stripe of the emission phosphor are calculated from the picked-up image and the luminance distribution of the test pattern in units of stripes (luminescent-non- luminescent-luminescent parts) is calculated by rearranging the luminance levels, based on the light emission position and a display device 52 displays the result of calculation.;COPYRIGHT: (C)2001,JPO