Invention Grant
- Patent Title: High pressure discharge lamp lighting apparatus
- Patent Title (中): 高压放电灯照明装置
-
Application No.: US12591244Application Date: 2009-11-13
-
Publication No.: US08164266B2Publication Date: 2012-04-24
- Inventor: Tetsu Okamoto , Hiroyuki Ishii , Minoru Fukuda
- Applicant: Tetsu Okamoto , Hiroyuki Ishii , Minoru Fukuda
- Applicant Address: JP Tokyo
- Assignee: Ushio Denki Kabushiki Kaisha
- Current Assignee: Ushio Denki Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Rader, Fishman & Grauer PLLC
- Priority: JP2008-297735 20081121
- Main IPC: H01J7/44
- IPC: H01J7/44 ; H01J13/46 ; H01J17/34 ; H01J19/78 ; H01J23/16 ; H01J29/96 ; H01J17/04 ; H01J61/04 ; H01K1/62 ; H05B41/16 ; H05B41/24 ; H05B37/02 ; H05B39/04 ; H05B41/36 ; G05F1/00
Abstract:
A high pressure discharge lamp lighting apparatus includes a high pressure discharge lamp and a power supply apparatus, wherein in a steady state lighting operation, an alternating current of a steady state lighting frequency and alternating current of a low frequency are supplied by turns to the high pressure discharge lamp, and wherein in a small electric power lighting in which electric power to be applied is smaller than that of the steady state lighting, alternating current of a small electric power lighting frequency and direct current are supplied by turns to the high pressure discharge lamp.
Public/Granted literature
- US20100127631A1 High pressure discharge lamp lighting apparatus Public/Granted day:2010-05-27
Information query
