| 摘要 |
PROBLEM TO BE SOLVED: To provide a CRT measurement device that reduces the detection time of a measured area on a display screen of a CRT so as to quickly measure the light emission characteristics. SOLUTION: A CCD camera 3 is placed opposite to the measurement area of a display screen of a CRT 6 and the entire display area of the CRT 6 receives electron emission. A data capture control section 2 allows the CCD camera 3 to conduct a plurality of exposures for a prescribed period in one period of a vertical synchronizing signal synchronously with the vertical synchronizing signal of the CRT 6 and extracts image data with a high level among a plurality of image data obtained by a plurality of the exposures to detect the position on the display screen of the CRT in the measured area for the image pickup period corresponding to the image data.
|
