Device for measuring a characteristic of a color cathode ray tub

Details Device for measuring a characteristic of a color cathode ray tub Device for measuring a characteristic of a color cathode ray tub

1989-12-22

1991-07-16

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

358139, H01J 2951, G09G 128, H04N 1700

Patent

active

050327690

ABSTRACT:
A device for measuring convergence of a color CRT periodically generating a test pattern in a predetermined portion of a screen of the color CRT including signal output means for outputting a signal corresponding to glow timing of the test pattern generated on the screen, image pickup means for picking up the test pattern on the screen to output an image signal, control means responsive to output of the signal output means for controlling the image pickup means so as to output the image signal during the time that the test pattern is not generated in the predetermined portion of the screen, and calculation means for calculating a convergence assessment value of the color CRT based on the image signal.

REFERENCES:
patent: 4593309 (1986-06-01), Uno et al.

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