Title:
低圧水銀蒸気放電ランプ
Document Type and Number:
Japanese Patent JP4634798
Kind Code:
B2
Abstract:
A low-pressure mercury vapor discharge lamp (1) has a discharge vessel (3) enclosing, in a gastight manner, a discharge space provided with a filling of mercury and a rare gas. The discharge vessel (3) comprises means for maintaining an electric discharge in the discharge space. A portion of the surface (15) of the discharge vessel (3) facing the discharge space is provided with a protective layer (16) comprising yttrium oxide or aluminum oxide and further comprises a borate and/or a phosphate of an alkaline earth metal and/or of scandium, yttrium, or a further rare earth metal. Preferably, the alkaline earth metal is calcium, strontium, and/or barium. Preferably, the further rare earth metal is lanthanum, cerium, and/or gadolinium. The lamp according to the invention has a comparatively low mercury consumption.
Inventors:
Engelbertus See PM Fossen
Cornelia T-Starts
Leonie M Gaelding
Estelle De Veil
Ingrid JM Snakes-Hendricks
Cornelia T-Starts
Leonie M Gaelding
Estelle De Veil
Ingrid JM Snakes-Hendricks
Application Number:
JP2004525655A
Publication Date:
February 16, 2011
Filing Date:
July 11, 2003
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
H01J61/35; H01J61/26; H01J61/30; H01J61/36; H01J61/44; H01J61/72
Domestic Patent References:
| JP6049445A | ||||
| JP61027055A | ||||
| JP2001279182A | ||||
| JP62229752A | ||||
| JP5225955A | ||||
| JP11339722A | ||||
| JP2000251839A | ||||
| JP41011628B1 |
Foreign References:
| WO2001056350A1 | ||||
| WO2002050871A1 |
Attorney, Agent or Firm:
Sadao Kumakura
Fumiaki Otsuka
Shishido Kaichi
Disciple Maru Ken
Ino Sato
Kosaku Sugimura
Hiroshi Tokunaga
Yoshiyuki Iwasa
Shiro Fujitani
Kiyoshi Kuruma
Kazuyuki Tomita
Fumiaki Otsuka
Shishido Kaichi
Disciple Maru Ken
Ino Sato
Kosaku Sugimura
Hiroshi Tokunaga
Yoshiyuki Iwasa
Shiro Fujitani
Kiyoshi Kuruma
Kazuyuki Tomita