Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Reexamination Certificate
2006-10-16
2008-11-04
Vo, Tuyet (Department: 2821)
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Automatic regulation
C315S291000, C315S307000, C315S224000, C315S247000
Reexamination Certificate
active
07446487
ABSTRACT:
A dimming mode selecting circuit (25) includes a switch circuit (251) and a compensation circuit (252). The switch circuit selects a first input voltage or a second input voltage according to an input signal. The compensation circuit connects to the switch circuit, for compensating voltage loss of the first input voltage or the second input voltage in the dimming mode selecting circuit, and outputting a first compensated input voltage or a second compensated input voltage according to the switch circuit. In the invention, the dimming mode selecting circuit combines a hysteresis circuit (250) with the compensation circuit, to make the input signal stably and the output signal reliably. The structure of the circuit is simple.
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Ger Chih-Chan
Wang Ko-Wen
Chung Wei Te
Hon Hai Precision Industry Co. Ltd.
Vo Tuyet
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