Illuminating device, having two identical lamps connected in parallel
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United States of America Patent
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Feb 18, 1992
Grant Date -
N/A
app pub date -
Dec 12, 1990
filing date -
Dec 7, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An illuminating device has two lamps developed as discharge tubes which have a serpentine course and are nested in each other by, in each case, a narrow U-shaped region and a wide U-shaped region. In this way both lamps can be of identical development and permit uniform illumination of a rectangular liquid crystal cell even upon failure of one lamp.
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