LED lamp

Details LED lamp LED lamp

1986-07-17

1988-02-23

Boudreau, Leo H.

Electric lamp and discharge devices: systems

Combined load device or load device temperature modifying...

Load device and impedance

315 53, 315185R, 315312, 315250, 313498, 362800, H05B 4100

Patent

active

047272899

ABSTRACT:
The present invention provides a light-emitting diode lamp having a printed circuit board which is arranged inside a glass bulb having a base at an end thereof, via a stem and stays. A plurality of light-emitting diodes are mounted on the printed circuit board, a current being supplied to the light-emitting diodes through a series resistor. The series resistor has an annular shape and is fitted around the stem, so that a conventional lower-voltage LED lamp can be upgraded to a 100-V LED lamp.

REFERENCES:
patent: 1275820 (1918-08-01), Wybaillie
patent: 4211955 (1980-07-01), Ray
patent: 4329625 (1982-05-01), Nishizawa et al.
patent: 4630183 (1986-12-01), Fujita

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