Video digital display device with analog input

Details Video digital display device with analog input Video digital display device with analog input

1976-09-10

1978-04-25

Trafton, David L.

Communications: electrical

Systems

Portable self-contained

315378, 315383, 340347AD, G06K 1520, H03K 1302

Patent

active

040865797

ABSTRACT:
An analog-to-digital converter includes a common input amplifying device such as a transistor in differential amplifier relationship with each of a plurality of output amplifying devices, one for each voltage range converted to digital form.
Separately controllable circuits are provided for: (A) setting a video display screen signal to the threshold of visibility, and (B) increasing the brightness of the screen to various levels above the threshold in accordance with digital signals from the analog-to-digital converter as modified by a brightness control.

REFERENCES:
patent: 2227630 (1941-01-01), Carnahan
patent: 2416199 (1947-02-01), Nagel
patent: 3142056 (1964-07-01), Martin et al.
patent: 3720859 (1973-03-01), Hilden
patent: 3964064 (1976-06-01), Brandau et al.

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