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1. 发明专利

JPH10134771A METAL HALIDE LAMP 失效
公开(公告)号：JPH10134771A
公开(公告)日：1998-05-22
申请号：JP29233996
申请日：1996-11-05
申请人： MATSUSHITA ELECTRONICS CORP
发明人： ENAMI HIROSHI , NISHIMOTO TATSUO , SEKI SATOYUKI , YOSHII AKIRA
IPC分类号： H01J61/50 , H01J61/36
摘要： PROBLEM TO BE SOLVED: To provide a metal halide lamp capable of stopping a discharging luminescent tube without scattering an outer tube or a luminescent tube material during expiration of a service life. SOLUTION: This lamp is provided with a quartz luminescent tube 8 having an electrode rod 2 holding an electrode 1 at a tip end, a metal foil 3 made of a molybdenum foil in which a rear end of the electrode rod 2 is connected at one end, a connection body 5 in which one end is connected to the other end of the metal foil 3, a luminescent part 6 that is a discharge space in which a metal halide is sealed as a luminescent substance, and a sealing part 7 contiguous to both ends of this luminescent part 6. The connection body 5 is sealed with air tightness in a sealing part 7 so that the electrode 1 is positioned in the luminescent part 6, and the sealing part 7 is provided with a void in which air tightness with the outside of the luminescent tube 8 is not maintained in the vicinity of a side end of the luminescent part 6 of the metal foil 3 sealed in the sealing part 7.

2. 发明专利

JP2000348681A HIGH PRESSURE DISCHARGE LAMP 失效
公开(公告)号：JP2000348681A
公开(公告)日：2000-12-15
申请号：JP15258699
申请日：1999-05-31
申请人： MATSUSHITA ELECTRONICS CORP
发明人： NISHIMOTO TATSUO , YOSHII AKIRA
IPC分类号： H01J61/54
摘要： PROBLEM TO BE SOLVED: To suppress occurrence of discharge in an outer tube by providing shielding of an insulator in a thermally-actuated element that is connected to an arc tube in parallel together with a starter and is stored in the outer tube. SOLUTION: Preferably, a starter comprises a switching element and a resistor, and an insulator is quartz glass. This high pressure discharge lamp is formed in a structure where, for example, a quartz-made arc tube with 66 mm inter-electrode fixed and supported in an outer tube with 360 mm entire length. A bimetal 6 of a thermally-actuated element is closed at a turning-on time of a power supply, and secondary voltage is applied from a ballast to a glow bulb as the starter and a serial body 8 of resistors to generate pulse voltage in the glow bulb. The pulse voltage generates discharge between a main electrode and an auxiliary electrode, and generates arc discharge between it and the main electrode to light the lamp. Then, heat of the arc tube opens the bimetal 6 to prevent conduction to the glow bulb. The bimetal 6 as the thermally-actuated element is shielded by a quartz-glass-made shielding body 20 with 1 mm thick insulator. Thus, the discharge lamp with high safety can be provided.

3. 发明专利

JP2000340174A METAL HALIDE LAMP 失效
公开(公告)号：JP2000340174A
公开(公告)日：2000-12-08
申请号：JP14991599
申请日：1999-05-28
申请人： MATSUSHITA ELECTRONICS CORP
发明人： NISHIMOTO TATSUO , YOSHII AKIRA , AKIYOSHI KENJI
IPC分类号： H01J61/20
摘要： PROBLEM TO BE SOLVED: To enhance a luminous flux maintenance factor and to suppress a lamp voltage rise to prevent flame failure from being generated. SOLUTION: This metal halide lamp is provided with an arc tube 1 provided with an electrode 1a on both sides thereof. Inside the arc tube, predetermined amounts of a mercury, a gas mixed with a neon and argon, a scandium iodide and a sodium iodide are sealed. Also sealed are 3-5 wt.% of the thorium iodide with respect to the total amount of a metal iodide and a metal to be a metal iodide having free energy higher than that of the sodium iodide and lower than that of the thorium iodide so as to have a molar ratio of 1.4-20 with respect to the thorium iodide.

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