Dimmer control circuit

Details Dimmer control circuit Dimmer control circuit

1988-06-09

1989-12-12

Yusko, Donald J.

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

315119, 315209T, 315225, 315291, H02H 320, H05B 3904

Patent

active

048870064

ABSTRACT:
A dimmer control circuit having time constant regulating means provided in a multivibrator for regulating the load time ratio of the output pulse signal of the multivibrator to control ON, OFF the voltage of a battery applied to a lamp by the output pulse signal to thereby regulate the luminous intensity of the lamp comprising stopping means provided in the multivibrator for operating near the end of the regulation in a direction for increasing the luminous intensity of the lamp by the time constant regulating means and stopping the operation of the multivibrator. Thus, the dimmer control circuit can stop the operation of the multivibrator near the end of regulation in a direction for increasing the luminous intensity of a lamp to control the connection of a battery directly to the lamp with a fine current.

REFERENCES:
patent: Re29589 (1978-03-01), Inoue
patent: 3949347 (1976-04-01), Gilbreath
patent: 4168453 (1979-10-01), Gerhard et al.
patent: 4321509 (1982-03-01), Miyaji et al.
patent: 4739226 (1988-04-01), Murata

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