Patent · US Expired

Information display device

US4295127A · kind A · utility

7Cited by

11References

4Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Helmut Sautter · Ditzingen, DE
Kurt Hurst · Stuttgart, DE
Rainer Schink · Leonberg, DE

Key dates

Filing date	Oct 25, 1978
Grant date	Oct 13, 1981
Priority date	—
Expiry date	Oct 25, 1998

Classification

Technology area (CPC G)Physics
CPC primaryG09F13/0472
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

To provide for alphanumeric representation, for example to indicate speed limits, traffic signals and the like, a frame forming a flat plate and defining a display surface is formed with grooves in which electromagnetically operated indicating elements are positioned, the indicating elements having differently colored regions, the colors either matching or contrasting with that of the display surface so that, either, the region surrounding the indicating element will appear blank, or have the aspect of a bar; by arranging the elements in bar codes, alphanumeric information can be provided. The indicating elements are held in any one pivoted position by permanent magnets and moved between positions by a pulse applied to a solenoid to change the position of the element from one to another stable, magnetically biassed position.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.