Automatic brightness limiter

Details Automatic brightness limiter Automatic brightness limiter

1989-07-05

1991-06-04

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358169, H04N 5235, H04N 557

Patent

active

050218859

ABSTRACT:
The invention provides an automatic brightness limiter having an amplification means to amplify the video signal and applying the image signal at the next stage and a contrast adjustment means to adjust the contrast of a screen through active components, the device comprising; control means which controls automatically the image signal level and the contrast of the CRT by controlling the outputs of the amplification means and the contrast adjustment means using a high voltage applied to an anode through control components, and lied between the amplification means and the contrast adjustment means. Improving the capacity of the brightness adjustment for the screen of the automatic brightness limiter may be attained according to the present invention.

REFERENCES:
patent: 3873767 (1975-03-01), Okada

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