Gain control circuit for use in shading compensation circuit
US5115327A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 2, 1990 |
| Grant date | May 19, 1992 |
| Priority date | — |
| Expiry date | Mar 2, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/673
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A gain control circuit used in a shading compensation circuit includes a signal processing circuit for an image signal successively output from each of cells of a line image sensor and a gain control signal corresponding to shading data output from an external signal system and converting the image signal into a signal with level corresponding to the gain control signal and for outputting a compensation image signal, and signal feedback circuit for inverting a reference compensation image signal and holding an inverted version of the reference compensation image signal and for feeding the inverted version of the reference compensation image signal back to a terminal of the signal processing circuit and which the image signal is input.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.