The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 23, 2009
Filed:
May. 08, 2006
Toshihiro Terada, Hyogo-ken, JP;
Masanobu Murakami, Osaka-fu, JP;
Kazuhiro Matsuo, Osaka-fu, JP;
Taizou Ono, Osaka-fu, JP;
Hideki Wada, Osaka-fu, JP;
Shingo Tsutsumi, Osaka-fu, JP;
Mitsuharu Kawasaki, Kyoto-fu, JP;
Hiroyuki Arata, Hyogo-ken, JP;
Yuko Habuta, Hyogo-ken, JP;
Tomokazu Matsuura, Osaka-fu, JP;
Hirofumi Yamashita, Osaka-fu, JP;
Toshihiro Terada, Hyogo-ken, JP;
Masanobu Murakami, Osaka-fu, JP;
Kazuhiro Matsuo, Osaka-fu, JP;
Taizou Ono, Osaka-fu, JP;
Hideki Wada, Osaka-fu, JP;
Shingo Tsutsumi, Osaka-fu, JP;
Mitsuharu Kawasaki, Kyoto-fu, JP;
Hiroyuki Arata, Hyogo-ken, JP;
Yuko Habuta, Hyogo-ken, JP;
Tomokazu Matsuura, Osaka-fu, JP;
Hirofumi Yamashita, Osaka-fu, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A backlight unit has an external electrode fluorescent lamp in an housing. The external electrode fluorescent lamp includes a glass bulb having a discharge space inside, and electrodes around both ends of the glass bulb. A protective layer and a phosphor layer are formed on an internal surface of the glass bulb in this order. The glass bulb is made of soda glass, and sodium oxide precipitated from this soda glass appears on part of the internal surface of the glass bulb where the protective layer is not formed, so as to be exposed to the discharge space.