发明申请
- 专利标题: METHOD FOR MANUFACTURING HIGH-PRESSURE DISCHARGE LAMP, HIGH-PRESSURE DISCHARGE LAMP, LAMP UNIT AND PROJECTION-TYPE IMAGE DISPLAY
- 专利标题(中): 制造高压放电灯,高压放电灯,灯单元和投影型图像显示的方法
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申请号: US12438040申请日: 2007-06-08
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公开(公告)号: US20100231872A1公开(公告)日: 2010-09-16
- 发明人: Yoshiki Kitahara , Katsuhiro Ono , Jun Sakaguchi , Ryo Minamihata
- 申请人: Yoshiki Kitahara , Katsuhiro Ono , Jun Sakaguchi , Ryo Minamihata
- 申请人地址: JP Kadoma-shi, Osaka
- 专利权人: PANASONIC CORPORATION
- 当前专利权人: PANASONIC CORPORATION
- 当前专利权人地址: JP Kadoma-shi, Osaka
- 优先权: JP2006-226904 20060823
- 国际申请: PCT/JP2007/061642 WO 20070608
- 主分类号: G03B21/20
- IPC分类号: G03B21/20 ; H01J61/36 ; F21V7/07 ; H01J9/26
摘要:
The present invention is directed to a method for manufacturing a high-pressure discharge lamp including: a spherical portion forming a light-emitting portion (1a); sealing portions that are connected with both ends of the spherical portion; an electrode (2a) that is sealed to each of the sealing portions; and a metal foil (3a) that is connected with a rear end of each electrode. A vessel provided with a cylindrical glass tube (8) on both ends of the spherical portion is used, a connection structure of the metal foil and the electrode are disposed in the glass tube such that a front end of the electrode is positioned in the spherical portion, and the glass tube is melted by heat and shrunk for sealing the metal foil and the electrode so as to form the sealing portion. An inner diameter φ of the glass tube before the heat-melt processing and a distance L from an edge of the metal foil to the internal space of the spherical portion are set to satisfy a relationship of L/φ≧1.35, a corner of an edge portion of the metal foil on a side of the connection with the electrode is cut so as to form a wedge shape (7a), and subsequently the sealing step is performed. Thereby, it can suppress the generation of the breakage during the lighting life span, which is caused by a gap generated from the metal foil to an axis of the electrode during the sealing processing of the high-pressure discharge lamp having a high brightness property.
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