Title:
発光管及び低圧水銀放電ランプ
Document Type and Number:
Japanese Patent JP4361845
Kind Code:
B2
Abstract:
A low-pressure mercury discharge lamp includes: an arc tube made by winding a glass tube into double spiral configuration; a holding member that is in a form of a cylinder with a closed bottom and is for holding the arc tube; an electronic ballast for lighting the arc tube; a case in a cone form for covering the electronic ballast by being fit to a circumferential wall of the holding member; and a globe covering the arc tube. When an inner diameter of the arc tube is represented as Di mm, and tube wall loading of the arc tube is represented as L W/cm2, rectangular coordinates (Di, L) are confined within a range defined by points of: (2.5, 0.31), (4.0, 0.35), (5.5, 0.30), (6.5, 0.19), and (2.5, 0.01).
Inventors:
Shiro Iida
Application Number:
JP2004226040A
Publication Date:
November 11, 2009
Filing Date:
August 02, 2004
Export Citation:
Assignee:
Panasonic Corporation
International Classes:
H01J61/30; F21S2/00; H01J61/32; H01J61/72; F21Y103/02
Domestic Patent References:
| JP2003263972A | ||||
| JP2001270732A | ||||
| JP2003157703A | ||||
| JP2004103556A | ||||
| JP2004186147A |
Foreign References:
| WO2003083895A1 |
Attorney, Agent or Firm:
Shiro Nakajima