Programmable CRT brightness control

Details Programmable CRT brightness control Programmable CRT brightness control

1981-07-13

1983-07-19

Murray, Richard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358185, H04N 514

Patent

active

043946895

ABSTRACT:
A multiple channel cathode ray tube video display provides for adjusting brightness of the displayed channel by a single input control, such a trackball or keyboard, to a computer that generates a channel coded binary word that is held in one of a plurality of memory latches, each corresponding to a channel. The binary word is converted to an analog brightness signal that controls the gain of a corresponding one of a plurality of video signal amplifiers.

REFERENCES:
patent: 3627914 (1971-12-01), Davies
patent: 3793480 (1974-02-01), Waehner
patent: 3946275 (1976-03-01), Marino
patent: 4018986 (1977-04-01), Wilk
patent: 4203131 (1980-05-01), Harwood et al.
patent: 4205344 (1980-05-01), Rayner
patent: 4223352 (1980-09-01), Belisomi
patent: 4321625 (1982-03-01), Smith
patent: 4340903 (1982-07-01), Tamura

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