Title:
外部電極型蛍光ランプ、バックライトユニット及び液晶テレビ
Document Type and Number:
Japanese Patent JP4109314
Kind Code:
B2
Abstract:
The present invention relates to a fluorescent lamp, and in particular to a fluorescent lamp with an improved in-dark starting characteristic. A fluorescent lamp includes: a glass bulb ( 101 ) having a discharge space therein; two external electrodes ( 102 and 103 ) provided at both ends of the glass bulb; and a phosphor layer ( 106 ) provided on an inner surface of the glass bulb. The glass bulb is made of glass that contains 3% to 20% inclusive of sodium oxide. The phosphor layer includes phosphor particles ( 106 R and 106 G) containing no alumina and phosphor particles ( 106 B) containing alumina. A metal oxide ( 107 ) is attached to surfaces of the phosphor particles containing alumina. Sodium oxide precipitated on the inner surface of the glass bulb improves the in-dark starting characteristic. The phosphor particles containing alumina are protected by the metal oxide for being susceptible to deterioration due to reaction thereof with sodium oxide.
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Inventors:
Kenji Yamada
Taizo Ono
Takuyuki Arata
Hideki Wada
Kazuhiro Matsuo
Matsuura Tomokazu
Toshihiro Terada
Taizo Ono
Takuyuki Arata
Hideki Wada
Kazuhiro Matsuo
Matsuura Tomokazu
Toshihiro Terada
Application Number:
JP2007523361A
Publication Date:
July 02, 2008
Filing Date:
May 22, 2006
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H01J65/00; F21S2/00; H01J5/50; H01J61/30; H01J61/35; H01J61/44; H01J61/46
Domestic Patent References:
| JP3088260A | ||||
| JP7316551A | ||||
| JP9153344A | ||||
| JP2002289146A | ||||
| JP2002358933A | ||||
| JP2003091007A | ||||
| JP2003171142A | ||||
| JP2003257377A | ||||
| JP2004022209A | ||||
| JP2004079267A | ||||
| JP2004146351A |
Foreign References:
| WO2003056883A1 | ||||
| WO2003105184A1 |
Attorney, Agent or Firm:
Shiro Nakajima
Shuji Matsumura
Kobayashi Kunito
Shuji Matsumura
Kobayashi Kunito
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