The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 10, 1989
Filed:
Jan. 16, 1987
Jean L Berger, Grenoble, FR;
Marc Arques, Grenoble, FR;
Thomson-CSF, Paris, FR;
Abstract
The invention provides a matrix of photosensitive elements in which each photosensitive element is reduced to the association of a diode and a capacity. The method for manufacture thereof is therefore easy particularly from amorphous silicon. The method for reading same uses multiplexed reading of the columns: the n columns are distributed in groups of n/M successive columns controlled simultaneously by M horizontal shift registers, each associated with a reading integrator. To ensure correct reading of the useful signal, whatever their level, the level of the voltages at the terminals of the diodes of the photosensitive elements is reset so that the starting voltage at the beginning of each reading pulse applied to a line is such that only this pulse, and even with a maximum useful illumination signal, can bias the diode forwardly, and so that with a column addressing pulse, the diode is biased forwardly even in the absence of the useful signal.