Light emitting diode retrofit lamp

Details Light emitting diode retrofit lamp Light emitting diode retrofit lamp

1994-03-03

1995-10-31

Pascal, Robert J.

Electric lamp and discharge devices: systems

Plural series connected load devices

Condenser in the supply circuit

362800, 315294, 315324, 315291, H05B 3702

Patent

active

054632803

ABSTRACT:
A retrofittable lamp using light emitting diodes as the illumination source, the lamp is fitted with any one of the common lamp bases and is intended as a retrofit for incandescent lamps having such bases in illuminated signs such as exit signs and the like. The invention contemplates the packaging of a number of light emitting diodes in a circuit usually having a current limiting device to allow LED operation at a desired current level. The light emitting diodes are placed within a standard glass or plastic bulb envelope in arrangements capable of providing even illumination from the lamp.

REFERENCES:
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patent: 4271408 (1981-06-01), Teshima et al.
patent: 4329625 (1982-05-01), Nishizawa et al.
patent: 4711955 (1980-07-01), Ray
patent: 4727289 (1988-02-01), Uchida
patent: 4736138 (1988-04-01), Masaki
patent: 4939426 (1990-07-01), Menard et al.
patent: 4963798 (1990-10-01), McDermott
patent: 5012157 (1991-04-01), Walton et al.
patent: 5155669 (1992-10-01), Yamuro

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