Instrument panel and EL lamp thereof

Details Instrument panel and EL lamp thereof Instrument panel and EL lamp thereof

1993-02-01

1994-11-01

Bertsch, Richard A.

Electric lamp and discharge devices: systems

With radiant energy sensitive control means

Load device irradiating the radiant energy responsive device

315307, 250205, H05B 3702

Patent

active

053610172

ABSTRACT:
Each of a plurality of EL lamps in an instrument panel has its own control circuit for connecting the lamp to an adjustable AC voltage source. Each control circuit includes a photodetector for detecting the intensity of the illumination of its associated lamp, when the lamp is energized. With respect to a given input voltage of the AC voltage source, when the intensity of the light emitted by a given lamp begins to diminish, its control circuit will automatically increase the AC voltage applied across the electrodes of the lamp, thereby maintaining the light intensity of the lamp regardless of its age, for a given AC input voltage to the control circuit. The intensity of each lamp therefore remains consistent throughout substantially the full life of the EL lamp.

REFERENCES:
patent: 4443741 (1984-04-01), Tanaka et al.
patent: 4467246 (1984-08-01), Tanaka et al.
patent: 4886961 (1989-12-01), Kimura et al.
patent: 5075596 (1991-12-01), Young et al.
patent: 5089748 (1992-02-01), Ihms

Affiliated with

Also associated with

Rating

Instrument panel and EL lamp thereof does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Instrument panel and EL lamp thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Instrument panel and EL lamp thereof will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1804341