Lamp control circuit

Details Lamp control circuit Lamp control circuit

1998-06-12

2000-12-12

Wong, Don

Electric lamp and discharge devices: systems

Discharge device and/or rectifier in the supply circuit

Flashers

315129, 315224, H05B 3700

Patent

active

061603554

ABSTRACT:
A lamp control circuit for use in a flashlight having a power supply and a light bulb. The lamp control circuit includes oscillator means selectively applying power to the light bulb for turning the bulb on and off at one of a plurality of a selectable frequencies, voltage indicator means coupled to the power supply for indicating to a user when the voltage level of the power supply falls below a pre-determined level and dimmer means coupled between the light bulb and the power supply for reducing the amount of electrical current supplied to the light bulb. The control circuit is mounted on a circuit board which is configured to indicate to the circuit the number and voltage of the batteries which are used to power the flashlight. An alternative embodiment may also include a light emitting diode for use when the battery voltage is insufficient to meet the threshold voltage of the bulb.

REFERENCES:
patent: 5124508 (1992-06-01), Dubrueq
patent: 5412548 (1995-05-01), Yee
patent: 5498934 (1996-03-01), Nilssen
patent: 5561351 (1996-10-01), Vrionis et al.
patent: 5585699 (1996-12-01), Schulz
patent: 5588739 (1996-12-01), Nakao
patent: 5648702 (1997-07-01), Choi et al.
patent: 5821697 (1998-10-01), Weber

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