Discharge lamp lighting circuit

Details Discharge lamp lighting circuit Discharge lamp lighting circuit

2007-10-16

2007-10-16

Tran, Thuy V. (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S291000, C315S2090SC

Reexamination Certificate

active

10916753

ABSTRACT:
In a discharge lamp lighting circuit1, circuits12, 13, which respectively detect a voltage applied to a discharge lamp10and a current flowing through the discharge lamp are provided. Light on/off state, furthermore, light on/off state detecting means25is provided, which detects light on state or light off state of the discharge lamp, in that the absolute value of the difference between voltage and current detection values of the discharge lamp in light off state is larger than that in light on state.

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patent: 2002/0117973 (2002-08-01), Ito et al.
patent: 10-312896 (1998-11-01), None

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