Luminaire using incandescent lamp as luminous source
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United States of America Patent
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Aug 30, 1994
Issued Date -
N/A
app pub date -
Aug 9, 1991
filing date -
Jul 27, 1989
priority date (Note) -
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Abstract
Disclosed is a novel luminaire wherein a switching power supply circuitry is used to operate one or more incandescent lamps at a dc voltage exceeding their rating. The luminaire emits a flickerless light with a color temperature of about 2,900 K. or higher which is natural, closer to sunlight, superior in color rendering properties, gentle to the eyes, therefore very useful in illumination. The switching power supply circuitry exhibits a high power efficiency and capacity, and the output voltage is easily regulatable to a desired magnitude for lamp dimming.
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