Programmable integration time photosensitive sensor
US5114237A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 24, 1990 |
| Grant date | May 19, 1992 |
| Priority date | — |
| Expiry date | Oct 24, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/711
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A photosensitive sensor including multilinear arrays of n lines of cells which operate by charge integration and time delay by successive observations of the same image line by the n lines in the array, and by accumulation of the corresponding n observations in the cells of the sensor. To avoid the risk of saturation inherent in the fact that the electrical charges resulting from n observations accumulate in the same cell, the number of lines between which the charge integration and delays are preformed is programmed to be between 1 and n. This programming is performed as a function of the average illumination of the image analysed. To do so, the electrodes (ES1, ES2) of certain lines of cells are used, and potentials are applied to them; either the normal charge transfer potentials or a blocking potential which isolates the lines beyond this blocking electrode from a reading stage (RL, CL).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.