LED light source with easily adjustable luminous energy

Details LED light source with easily adjustable luminous energy LED light source with easily adjustable luminous energy

1991-09-20

1992-09-22

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Plural load device regulation

315185R, 315189, 315192, 362800, H05B 3700

Patent

active

051500167

ABSTRACT:
An LED light source with readily adjustable luminous energy including LED chips is disclosed. A resistor device is provided in order to control the current flowing in LED chips for reducing variance of luminous energy. The resistor device includes a plurality of resistors arranged in parallel, and a plurality of fuses connected in series with the respective resistors. In order to obtain the desired resistance value of the resistor device, the fuses connected to unnecessary resistors in series are burnt out by applying an excess current to the fuses thereby omitting a bonding process of the resistors or the like.

REFERENCES:
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patent: 4329625 (1982-05-01), Nishizawa et al.
patent: 4412241 (1983-10-01), Nelson
patent: 4686384 (1987-08-01), Harvey et al.
patent: 4810937 (1989-03-01), Havel
patent: 4939426 (1990-07-01), Menard et al.
patent: 4947291 (1990-08-01), McDermott
patent: 5058059 (1991-10-01), Matsuo et al.

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