OPTOELECTRONIC LOGICAL-CIRCUITS CONTROLLED AUTOMOTIVE ELECTROLUMINESCENT DASHBOARD DISPLAY

Abstract

In modern automotive vehicles, sophisticated measuring systems, which convert and display stored data to the driver, have been used. One of the basic problems is the mode of data transmission to the driver. A general usable mode for transmitting the driver's information is optical signalling which can be realized with the aid of electroluminescent dashboard displays. Automotive electroluminescent dashboard displays applied for data transmission may be controlled by optoelectronic logical circuits which are practically insensitive to electromagnetic interference. The most interesting are memory cells which contain two photoconducting (PC) and two electroluminescent (EL) units. Between a single EL unit and a single PC unit, optical feedback can be provided so that these two units constitute a bistable system. Experimental investigations of the above mentioned units will be presented.