Electric lamp and discharge devices – With luminescent solid or liquid material – With gaseous discharge medium
Reexamination Certificate
2007-02-21
2010-11-23
Williams, Joseph L (Department: 2889)
Electric lamp and discharge devices
With luminescent solid or liquid material
With gaseous discharge medium
C313S487000, C349S070000
Reexamination Certificate
active
07839069
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 (a1) from a first sealed portion of a glass bulb (26) to a non-phosphor layer (32) area is shorter than a length (a2) from a second sealed portion to a non-phosphor layer (32) area (a1<a2). 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.
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Chinese Office Action re App No. 200780010192.2, May 11, 2010, 7 pages including translation.
Ido Shigeru
Kihara Shinji
Kitada Akio
Kumada Kazuhiro
Maniwa Takashi
Panasonic Corporation
Williams Joseph L
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