International Standard Electric Corporation

Joachim Lauckner

Gerhard Wessel

Gerhard Seibold

Felix Lutz

Hans Volz

Heinz Ebner

Gabriele I Koch

The disclosed invention relates to an electro-optical device for use with a facsimile printer, telecopier, etc., designed to accommodate line-at-a-time output of picture information with the aid of an electrically controllable electro-optical substrate made from a transparent electro-optical material, with the optical effect being controlled by applying a voltage between two control electrodes arranged next to each other on the substrate. According to a preferred embodiment of the invention, within the area (4) of the substrate (1) to be controlled, and in addition to the control electrodes (2,3), there is provided at least one additional electrode (7) which may be common to several such areas (4), with each area (4) to be controlled having a corresponding opening (8) in the additional electrode (7) and the two control electrodes (2, 3) being spaced apart from each other on one side of the substrate (1) and the one or more additional electrodes (7) being arranged on the opposite side of the substrate. By applying a suitable voltage to the additional electrode (7), the electro-optical effect of the substrate can be varied within the areas (4) independently of the control (switching) voltage applied to the control electrodes (2, 3). Thus, various grey values can be provided; alternatively, a particular substrate (1) can be matched or adapted to one from another production batch and the control voltages can be kept to minimal levels.

Electro-optical device

An optical switch comprising a controlled ferroelectric light permeable ceramic provided with electrodes. To simplify the manufacture and to realize a larger switch, the invention provides a baseplate with electrodes and the ferroelectric ceramic is secured thereon in the form of one or more strips.

Optical switch

A device for controlling the spot elements of an optically controllable component in a facsimile recorder which permits a high writing speed with minimum circuitry. The plurality of spot elements of the controllable optical component are combined in n groups of m&gt;1 spot elements each, the m spot elements of a group forming a partial line. The individual partial lines are energized successively in time, while their m spot elements are energized simultaneously, the respective n-1 nonenergized partial lines completely blocking the light flux.

Growing community of inventors

Korntal, Germany

Joachim Lauckner