Automatic brightness control device

Details Automatic brightness control device Automatic brightness control device

1985-12-27

1987-09-22

Masinick, Michael A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 74, 358243, H04N 5235, H04N 557

Patent

active

046958851

ABSTRACT:
An automatic brightness control device for preventing deterioration of image quality caused by frequency image muting to delete unnecessary images on a video screen which comprises an input terminal, a scaler for obtaining a mean value, first and second switching devices, and a sample and hold and integrating device all connected in the combination.

REFERENCES:
patent: 4356436 (1982-10-01), Barten et al.
patent: 4489349 (1984-12-01), Okada
patent: 4514727 (1985-04-01), Van Antwerp
patent: 4628362 (1986-12-01), Waehner

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