DISCHARGE LAMP LIGHTING APPARATUS
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United States of America Patent
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Nov 3, 2016
app pub date -
Sep 19, 2014
filing date -
Dec 17, 2013
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Abstract
A lighting apparatus of a discharge lamp is provided with a power supply section which supplies AC current to the discharge lamp, a power control section which outputs a signal concerning a control power value to the power supply section, and a pulse generating section which outputs a pulse wave to the power supply section. The power control section carries out a control of differentiating the control power value at a first period and the control power value at a second period, in a direction that a difference is reduced between average light intensities or average powers of the discharge lamp at the first period and the second period, in comparison with a case where the control power value is identical at the first period and the second period.
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