Method and apparatus for driving a solid state camera
US4556911A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1984 |
| Grant date | Dec 3, 1985 |
| Priority date | — |
| Expiry date | Mar 23, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/621
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for increasing the sensitivity of a charge priming type solid state camera having means for sweeping out undesired excess charges generated by a vertical smear from vertical signal lines. When the scene illumination is higher than an appropriate value, the sweep out of the undesired excess charges is executed within each horizontal blanking period in order to reduce the vertical smear. When the scene illumination becomes lower than the appropriate value, the sweep out thereof is stopped in order to increase the sensitivity. Alternatively, when the scene illumination is lower than the appropriate value but the quantity of the vertical smear is larger than a fixed value, the sweep out thereof is executed within each horizontal blanking period in order to suppress vertical smear which is at an unacceptably high level even though the illumination level is relatively low.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.