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:
Oct. 15, 1987
Klaus Dietrich, Gochsheim, DE;
Messerschmitt-Bolkow-Blohm GmbH, Munich, DE;
Abstract
The invention relates to an image recording sensor (1) with a plurality of photodetectors (15) in a matrix arrangement. The photodetectors (15) are here integrated components of cells (2), which through address lines (PX, PY) can be coupled for the definition of cell addresses. Each cell has at least one capacitor (C1, C2), in which the photocharge of the photodetector (15) can be stored. The resulting capacitor voltage (U1) is compared in a comparator (17) with a reference voltage (U.sub.REF, U2). The comparator is succeeded by an output circuit (18) for the output of a signal to the address lines upon the occurrence of a positive comparison result. All cells (2) can be driven via an external control circuit (4) with groups of common control and check signals. With such image recording sensor (1) no intensity values per picture element are output but only the addresses of the picture elements of interest, in which the intensity value has exceeded a given level, i.e., the intensity equivalent of the reference voltage (U.sub.REF, U2).