Invention Grant
US07002299B2 Discharge lamp with specific amounts of halogen, oxygen, hydrogen and carbon
有权
放电灯具有特定量的卤素,氧气,氢气和碳
- Patent Title: Discharge lamp with specific amounts of halogen, oxygen, hydrogen and carbon
- Patent Title (中): 放电灯具有特定量的卤素,氧气,氢气和碳
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Application No.: US10697090Application Date: 2003-10-31
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Publication No.: US07002299B2Publication Date: 2006-02-21
- Inventor: Masataka Kawaguchi , Motoko Uramoto , Dan Masashi , Yoshihiro Horikawa
- Applicant: Masataka Kawaguchi , Motoko Uramoto , Dan Masashi , Yoshihiro Horikawa
- Applicant Address: JP Tokyo
- Assignee: Ushiodenki Kabushiki Kaisha
- Current Assignee: Ushiodenki Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agent David S. Safran
- Priority: JP2002-319980 20021101
- Main IPC: H01J61/12
- IPC: H01J61/12

Abstract:
A discharge lamp which maintains a high lumen maintenance factor even when operated for a long time is obtained in a discharge lamp which has a silica glass discharge vessel and a pair of opposed electrodes in the discharge vessel and in which the discharge vessel is filled with at least 0.15 mg/mm3 mercury, a rare gas with argon as the main component, and 2×10−4 μmole/mm3 to 7×10−3 μmole/mm3 bromine by meeting the following conditions when feeding a direct current of 5 mA between the electrodes and a glow discharge produced: 1.0×10−4≦b/a≦1.2×10−1 Condition (1) c/a≦1.4×10−1 Condition (2) d/a≦1.2×10−2 Condition (3) e/a≦1.4×10−2 Condition (4) where a is the emission intensity of the argon with a wavelength of 668 nm, b is the emission intensity of OH with a wavelength of 309 nm, c is the emission intensity of hydrogen (H) with a wavelength of 656 nm, d is the emission intensity of C2 with a wavelength of 517 nm, and e is the emission intensity of CH with a wavelength of 431 nm.
Public/Granted literature
- US20040090183A1 Discharge lamp Public/Granted day:2004-05-13
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