Light-responsive light-emitting diode display

Details Light-responsive light-emitting diode display Light-responsive light-emitting diode display

1979-07-17

1982-05-11

La Roche, Eugene R.

Electric lamp and discharge devices: systems

With radiant energy sensitive control means

Radiant energy controlled regulation of the current supply...

307311, 315 53, 315152, 315192, 315311, 315312, 362800, H05B 4300

Patent

active

043296254

ABSTRACT:
A light-responsive light-emitting diode display comprises a light-emitting diode circuit including a series connection of light-emitting diodes and a light-responsive current-controlling circuit connected in series to said light-emitting diode circuit for supplying a current thereto in correspondence with the ambient brightness. A unipolar photo-transistor can provide a current above a predetermined minimum value and increasing with the intensity of incident lights and can absorb excess voltages when applied. Light-responsive current-control reduces the useless power dissipation, and all solid-state display provides a very long service life.

REFERENCES:
patent: 3757511 (1973-09-01), Burgess et al.
patent: 3911423 (1975-10-01), Arndt et al.
patent: 4029991 (1977-06-01), Schultz
patent: 4114366 (1978-09-01), Renner et al.
patent: 4182977 (1980-01-01), Stricklin
patent: 4211955 (1980-08-01), Ray
Nishizawa et al., Bipolar Mode Static Induction Transistor (BSIT)-High Speed Switching Device, IEDM Dec. 1978, pp. 676-679.

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