发明名称 |
METAL HALIDE LAMP AND LUMINAIRE |
摘要 |
he present invention aims at providing a metal halide lamp having a configuration to achieve the following goals: to prevent the lamp from burning out during the life due to a rise in lamp voltage; and to obtain high luminous efficiency at the same time. The metal halide lamp 1 comprises: an arc tube 4 made of translucent ceramic and having a main tube part 6 in which a pair of electrodes 14 is disposed; and an outer tube 3 housing the arc tube 4 therein. 4.0 <=L/D <= 10.0, WHEREL (mm) is a length of a space between the electrodes 14 and D (mm) is an internal diameter of the main tube part 6. R/r >= 3.4, where R (mm) is an internal diameter of the outer tube 3 and r (mm) is an external diameter in the main tube part 6 of the arc tube 4, within a region positionally corresponding to, in a radial direction of the outer tube and the arc tube, the space between the electrodes 14, on a cross-sectional surface where an outer circumference of the arc tube 4 comes closest to an inner circumference of the outer tube 3. M <= 4.0, WHEREM (mg/cc) is a density of mercury enclosed in the arc tube 4. |
申请公布号 |
WO2005062341(A2) |
申请公布日期 |
2005.07.07 |
申请号 |
WO2004JP19478 |
申请日期 |
2004.12.20 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;KAKISAKA, SHUNSUKE;NOHARA, HIROSHI;UTSUBO, ATSUSHI;KANAZAWA, YUKIYA |
发明人 |
KAKISAKA, SHUNSUKE;NOHARA, HIROSHI;UTSUBO, ATSUSHI;KANAZAWA, YUKIYA |
分类号 |
H01J61/20;H01J61/12;H01J61/34;H01J61/82 |
主分类号 |
H01J61/20 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|