Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Patent
1995-08-15
1998-05-05
Pascal, Robert
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Automatic regulation
315DIG5, 315DIG7, H05B 3702
Patent
active
057479470
ABSTRACT:
A multi-output circuit for projection TV lamp is disclosed including a DC/DC-voltage converter, a voltage dividing portion, a driving pulse generator for generating a driving pulse, a lamp driving portion for switching the output voltage of the DC/DC-voltage converter, a voltage feeding-back portion for comparing the output voltage of the voltage dividing portion with a reference voltage, a current feeding-back portion for comparing the driving current supplied to the lamp with the reference voltage, a current detecting portion for detecting the driving current supplied to the lamp, an error amplifying portion for comparing the output voltage output from the current detecting portion, a gain controller for summing the output voltages of the voltage feeding-back portion and current feeding-back portion, and a pulse-width modulation integrated device for outputting a pulse-width modulation signal to the DC/DC-voltage converter.
REFERENCES:
patent: 5449973 (1995-09-01), Yamashita et al.
LG Electronics Inc.
Pascal Robert
Shingleton Michael
White John P.
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