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:
Nov. 23, 2010
Filed:
Feb. 21, 2007
Akiko Nakanishi, Osaka, JP;
Taizou Ono, Osaka, JP;
Hirofumi Yamashita, Osaka, JP;
Kazuhiro Kumada, Hyogo, JP;
Haruo Yamazaki, Kyoto, JP;
Shinji Kihara, Kyoto, JP;
Akio Kitada, Osaka, JP;
Masanobu Murakami, Osaka, JP;
Tomokazu Matsuura, Osaka, JP;
Hiroshi Sakurai, Osaka, JP;
Makoto Yokozeki, Kagawa, JP;
Takashi Maniwa, Osaka, JP;
Shigeru Ido, Osaka, JP;
Akiko Nakanishi, Osaka, JP;
Taizou Ono, Osaka, JP;
Hirofumi Yamashita, Osaka, JP;
Kazuhiro Kumada, Hyogo, JP;
Haruo Yamazaki, Kyoto, JP;
Shinji Kihara, Kyoto, JP;
Akio Kitada, Osaka, JP;
Masanobu Murakami, Osaka, JP;
Tomokazu Matsuura, Osaka, JP;
Hiroshi Sakurai, Osaka, JP;
Makoto Yokozeki, Kagawa, JP;
Takashi Maniwa, Osaka, JP;
Shigeru Ido, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
The orientation of fluorescent lamps is detected in a manufacturing method for a direct backlight unit that alternates orientations of adjacent fluorescent lamps. In a preparation step of the manufacturing method for the backlight unit of the present invention, a plurality of fluorescent lamps are prepared. In each of the fluorescent lamps, a length (a) from a first sealed portion of a glass bulb () to a non-phosphor layer () area is shorter than a length (a) from a second sealed portion to a non-phosphor layer () area (a<a). In a detection step, the difference between the lengths is detected with use of a sensor. In an installation step, the fluorescent lamps are arranged with use of the detection results so that the first and second ends alternate on a same side of a housing.