Automotive instrument display having a thickfilm electroluminesc

Details Automotive instrument display having a thickfilm electroluminesc Automotive instrument display having a thickfilm electroluminesc

1989-08-04

1990-09-25

Husar, Stephen F.

Illumination

Sound equipment illuminator

116288, 116DIG35, 362 26, 362 29, 362 84, B60Q 304

Patent

active

049597590

ABSTRACT:
A solid state thickfilm electroluminescent lamp illuminates a pointer for viewing automotive instrument clusters during low ambient light conditions. A solid state ThFEL lamp is placed between the faceplate of a vehicle dashboard and the air core mechanism. An instrument cluster pointer is situated on the opposite side of the faceplate from the ThFEL lamp. The ThFEL lamp is donut-shaped with a hole in its center to allow the pointer to connect to the air core mechanism. The lamp has a reflectie electrode and a transparent electrode situated such that the reflective electrode directs the ThFEL light towards the pointer where it is needed and away from the air core mechanism. The pointer is designed to collect a large area of dim light, focusing that light down the pointer shaft and reflecting it to an observer viewing the instrument cluster.

REFERENCES:
patent: 4181925 (1980-01-01), Burrows et al.
patent: 4559582 (1985-12-01), Scardilli et al.
Instrument Cluster Brochure by VDO Yazaki Corp., pp. 2-9, publication date unknown.

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