Device for controlling image pattern of a computer-controlled te

Details Device for controlling image pattern of a computer-controlled te Device for controlling image pattern of a computer-controlled te

1990-05-10

1991-07-30

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

With radiant energy sensitive control means

358 10, H01J 3126

Patent

active

050362518

ABSTRACT:
There is disclosed a device for automatically controlling image pattern of a computer-controlled television by feeding back the image pattern displayed on the CRT screen by means of the video camera. The control device to feed back the image pattern includes a video camera faced to the CRT screen of the CCTV, for converting the image pattern into an electrical composite video signal; a RGB matrix for separating the composite video signal into the respective R, G, B components; a first, second and third analog-to-digital converters for respectively R, G, B components into corresponding R, G, B digital signals; a pattern recognizor for comparing the R, G, B components with reference values programmed in advance; and a control computer for providing deflection equalizing data to the CCTV to equalize the image pattern distorted, according to the comparing result of the pattern recognizor.

REFERENCES:
patent: 4551653 (1985-11-01), Hilsum
patent: 4868668 (1989-09-01), Tavernetti

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