Programmable integration time photosensitive sensor

Details Programmable integration time photosensitive sensor Programmable integration time photosensitive sensor

1990-10-24

1992-05-19

Groody, James J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

35821319, 35821331, 357 24, H04N 515, H04N 5217

Patent

active

051142376

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).

REFERENCES:
patent: 4280141 (1981-07-01), McCann et al.
patent: 4581539 (1986-04-01), Kimata
patent: 4645938 (1987-02-01), Brissot et al.
patent: 4668990 (1987-05-01), Kondo et al.
patent: 4744057 (1988-05-01), Descure et al.
patent: 4775798 (1988-10-01), Munier
patent: 4900943 (1990-02-01), Marshall et al.

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