US 4,288,702 A · Image pickup device having electrode matrix coupling

Abstract

An impage pickup device for reading documents without the use of a separate optical system and in which complex wiring connections are provided upon the same substrate as the photosensitive reading elements. Parallel individual electrodes arranged in groups are disposed upon one surface of an insulating substrate with each electrode within each of the groups being of a different length. A layer of photoconductive material is disposed over first parallel end portions of the individual electrodes with common electrodes, one of which is provided for each of the groups, disposed over the photoconductive layer opposite corresponding groups of individual electrodes. A layer of insulating material is disposed over second staggered end portions of the individual electrodes with parallel common conductors perpendicular to the individual electrodes arrayed upon the upper surface of the insulating layer. Each of the common conductors is coupled through apertures in the insulating layer to a corresponding single individual electrode from each of the groups. Preferably, at least one of the individual electrode and common electrode is transparent.

Claims4

Dependent claims

An image pickup device comprising:

a plurality of individual electrodes divided into a plurality of groups, said individual electrodes being provided on one surface of a photoconductive film;
a plurality of common electrodes disposed on an opposite surface of said photoconductive film opposite said groups of individual electrodes respectively forming light receiving elements with said individual electrodes;
and common conductors connecting in the form of a matrix said individual electrodes which are provided at corresponding positions respectively in said groups of individual electrodes, at least one of said individual electrodes and said common electrodes being transparent electrodes so that when an optical image is projected onto said light receiving elements signal charges provided by said light receiving elements are stored in a stray capacitor in a common wiring section, said common wiring section being formed on the substrate of said light receiving elements, and the length of each common conductor of the common wiring section is sufficiently longer than the length of each individual electrode such that the impedances and stray capacitances of wirings from said light receiving elements to matrix wiring ends are substantially equal to one another.

Dependencies are inferred from the claim text.

Image pickup device having electrode matrix coupling

Life of this patent

Image pickup device having electrode matrix coupling

Life of this patent

Abstract

Claims4