US 7,615,937 B2
	High-pressure discharge lamp lighting device and lighting fixture
Masanori Mishima, Osaka (Japan)
Assigned to Panasonic Electric Works Co., Ltd., Osaka (Japan)
Appl. No. 10/598,463 PCT Filed Mar. 25, 2005, PCT No. PCT/JP2005/005508 § 371(c)(1), (2), (4) Date Aug. 31, 2006, PCT Pub. No. WO2005/094137, PCT Pub. Date Oct. 06, 2005.
Claims priority of application No. 2004-091111 (JP), filed on Mar. 26, 2004.
Prior Publication US 2007/0170873 A1, Jul. 26, 2007
Int. Cl. G05F 1/00 (2006.01)

U.S. Cl. 315—291  [315/307; 315/308; 315/224; 315/209 R; 315/289; 315/DIG. 4]

13 Claims

1. A high-pressure discharge lamp lighting device comprising a power conversion unit for supplying AC power to a high-pressure discharge lamp as a load with a DC power supply as an input power supply for performing all lighting or dimming lighting, wherein in an area where the voltage across the high-pressure discharge lamp grows as dimming deepens, the output characteristic of said power conversion unit is a characteristic for increasing output current of said power conversion unit in response to an increase in output voltage of said power conversion unit.