Control device for high intensity discharge bulb and method...

Details Control device for high intensity discharge bulb and method... Control device for high intensity discharge bulb and method...

2007-12-25

2007-12-25

Vo, Tuyet (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S307000, C315S247000, C315S274000, C315S279000

Reexamination Certificate

active

11372893

ABSTRACT:
Two types of rectangular waves having different numbers of driving pulses are applied to the HID bulb. By changing the combination of these two different types of rectangular waves to be supplied , the driving energy of the HID bulb is increased or decreased, thereby supply electric energy to the HID bulb is controlled accurately.

REFERENCES:
patent: 5481163 (1996-01-01), Nakamura et al.
patent: 6163115 (2000-12-01), Ishizuka
patent: 2004/0183476 (2004-09-01), Ishizuka
patent: 2004/0189217 (2004-09-01), Ishihara et al.
patent: 2006/0055341 (2006-03-01), Watanabe et al.
Tsutomu Shiomi, Takashi Kambara, et al., Ballasts for HID Headlamp Systems for Automobiles, Matsushita Electric Works Technical Report (May 2001), pp. 13-19.

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