Invention Grant
- Patent Title: High-pressure discharge lamp lighting device, high-pressure discharge lamp device using the same, projector using the high-pressure discharge lamp device, and lighting method for high-pressure discharge lamp
- Patent Title (中): 高压放电灯照明装置，使用其的高压放电灯装置，使用高压放电灯装置的投影仪和高压放电灯的照明方法
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Application No.: US13202539Application Date: 2011-01-17
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Publication No.: US09030130B2Publication Date: 2015-05-12
- Inventor: Masahiro Yamamoto , Syunsuke Ono
- Applicant: Masahiro Yamamoto , Syunsuke Ono
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Priority: JP2010-106782 20100506
- International Application: PCT/JP2011/000194 WO 20110117
- International Announcement: WO2011/138846 WO 20111110
- Main IPC: H05B37/02
- IPC: H05B37/02 ; H05B41/288 ; H05B41/38
Abstract:
From a start of a lighting until a predetermined time period passes, a high-pressure discharge lamp is supplied with a constant current (Ib) until the lamp power reaches a predetermined wattage (Plow). When the lamp power reaches the wattage (Plow), current is supplied to maintain the lamp power at the wattage (Plow). After another predetermined time period passes, current is supplied to maintain the lamp power at a rated lamp wattage (Pr). While this lamp power is being maintained, the size of the lamp current is limited to a current limit (Ia). The current (Ib) and the wattage (Plow) satisfy a relationship Ia·0.7≦Ib≦Ia·0.9 and Pr·0.5 Plow≦Pr·0.9 to accelerate an initial building of luminous flux while reducing drainage to the electrodes.
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