Video digital display device with analog input
US4086579A · kind A · utility
12Cited by
5References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 10, 1976 |
| Grant date | Apr 25, 1978 |
| Priority date | — |
| Expiry date | Sep 10, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/361
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.