PROJECTOR AND DRIVING METHOD FOR PROJECTOR
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United States of America Patent
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Issued Date -
Jan 19, 2017
app pub date -
Jul 13, 2016
filing date -
Jul 17, 2015
priority date (Note) -
Abandoned
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Abstract
A projector is provided which includes: a Peltier device having a first surface in contact with an optical component (heat generating component) and a second surface in contact with a heat sink (heat dissipating component); and a Peltier device driving unit as a controller that generates a temperature difference between the two surfaces of the Peltier device by applying a cyclically changing voltage to the Peltier device. The Peltier device driving unit applies to the Peltier device a first voltage in a first of two time periods of a cycle and applies a lower second voltage in the second time period, the first voltage being for transferring heat from the optical component to the heat sink to reduce the temperature of the first surface below that of the second surface, and the second voltage being for preventing the transfer of heat from the second surface to the first surface.
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