Discharge lamp lighting apparatus

Details Discharge lamp lighting apparatus Discharge lamp lighting apparatus

2011-05-03

2011-05-03

Vu, David Hung (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Impedance or current regulator in the supply circuit

C315S307000, C315SDIG002

Reexamination Certificate

active

07936130

ABSTRACT:
A discharge lamp lighting apparatus includes a DC/DC converter for converting an input direct voltage to a direct voltage of a different voltage value than the input direct voltage by switching and then outputting the converted direct voltage; a discharge lamp driver for converting the output direct voltage, which is supplied from the DC/DC converter, to a voltage suitable for driving a discharge lamp; a pulse width controller for generating a pulse width controlled switching control signal based on a reference pulse and then supplying the switching control signal to the DC/DC converter; and a microprocessor for controlling the apparatus as a whole and supplying to the pulse width controller a pulse width control signal and the reference pulse in synchronism with the pulse width control signal.

REFERENCES:
patent: 6815912 (2004-11-01), Ishihara et al.
patent: 7002305 (2006-02-01), Kambara et al.
patent: 2001-273984 (2001-10-01), None
patent: 2008-59806 (2008-03-01), None
patent: 2008-98074 (2008-04-01), None

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