Title:
DISCHARGE LAMP AND ELECTRODE FOR DISCHARGE LAMP
Document Type and Number:
WIPO Patent Application WO/2005/069348
Kind Code:
A1
Abstract:
Disclosed is a cold cathode discharge lamp having an improved luminous efficiency and a prolonged life. A discharge lamp (1) comprises an electrode (3) having a cup (4) with a bottom on either end of a glass tube (2). Each cup (4) is connected to a lead-in wire (8) which is inserted and held in an end portion of the glass tube (2). The opening end portion (4a) of each cup (4) is provided with an anti-collision ring (5) covering the end of the cup (4). The inner side of the bottom portion of each cup (4) is provided with a porous tungsten disk (6) as an electron-emitting substance which is impregnated with a three-element metal oxide containing barium (Ba), aluminum (Al) and calcium (Ca).
Inventors:
TAKAHASHI HIROSHI (JP)
HARA YUKIO (JP)
KIKUCHI MASAHIRO (JP)
HORIKOSHI YOSHIICHI (JP)
WATANABE HIROTO (JP)
YOSHIDA RYOUICHI (JP)
HARA YUKIO (JP)
KIKUCHI MASAHIRO (JP)
HORIKOSHI YOSHIICHI (JP)
WATANABE HIROTO (JP)
YOSHIDA RYOUICHI (JP)
Application Number:
PCT/JP2005/000612
Publication Date:
July 28, 2005
Filing Date:
January 19, 2005
Export Citation:
Assignee:
SONY CORP (JP)
TAKAHASHI HIROSHI (JP)
HARA YUKIO (JP)
KIKUCHI MASAHIRO (JP)
HORIKOSHI YOSHIICHI (JP)
WATANABE HIROTO (JP)
YOSHIDA RYOUICHI (JP)
TAKAHASHI HIROSHI (JP)
HARA YUKIO (JP)
KIKUCHI MASAHIRO (JP)
HORIKOSHI YOSHIICHI (JP)
WATANABE HIROTO (JP)
YOSHIDA RYOUICHI (JP)
International Classes:
H01J61/067; H01J61/06; (IPC1-7): H01J61/06; H01J61/067
Foreign References:
| JP2002313278A | 2002-10-25 | |||
| JPH02186550A | 1990-07-20 | |||
| JPH05251044A | 1993-09-28 | |||
| JPS5753043A | 1982-03-29 |
Attorney, Agent or Firm:
Yamaguchi, Kunio (Hirayama Building 15-2, Uchikanda 1-chome, Chiyoda-k, Tokyo 47, JP)
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