Electric lamp and discharge devices: systems – With radiant energy sensitive control means – Radiant energy control of an electric discharge device in...
Patent
1993-09-27
1996-08-20
Pascal, Robert
Electric lamp and discharge devices: systems
With radiant energy sensitive control means
Radiant energy control of an electric discharge device in...
315150, 315155, 315307, 315247, H05B 3702
Patent
active
055481884
ABSTRACT:
An apparatus and a method for controlling an illumination of a lamp. The apparatus comprises an illumination detecting circuit for detecting an ambient illumination, a human body detecting circuit for detecting an infrared-ray radiated from a body of the user, a microcomputer for comparing the detected ambient illumination with an illumination preset therein and outputting a pair of first control signals and a second control signal in accordance with the compared result, each of the first control signals having a frequency which is varied according to the compared result, the second control signal having a first or second level according to the compared result, the microcomputer discriminating in response to an output signal from the human body detecting circuit whether the user is present around the lamp and muting the output of the first control signals when the user is not present around the lamp, so as to turn off the lamp, a power factor enhancing circuit for allowing a lamp drive voltage and a lamp drive current to be in phase with each other, and a lamp driving circuit having a pair of switching circuits for controlling the flow of the drive current to the lamp in response to the first control signals from the microcomputer and a high voltage charging circuit charged with the drive current.
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Gambino Darius
Pascal Robert
Samsung Electronics Co,. Ltd.
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