Discharge lamp driving device, projector, and discharge lamp driving method
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United States of America Patent
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Jun 27, 2017
Issued Date -
N/A
app pub date -
Dec 22, 2015
filing date -
Mar 3, 2015
priority date (Note) -
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Abstract
A discharge lamp driving device includes: a discharge lamp drive unit configured to supply a drive current to a discharge lamp having two electrodes; a voltage detection unit configured to detect an inter-electrode voltage of the discharge lamp; and a control unit configured to control the discharge lamp drive unit, wherein the control unit executes first measurement drive in which a polarity of the drive current is maintained constant at a first polarity, the voltage detection unit measures the inter-electrode voltage multiple times in a first measurement period in which the first measurement drive is executed, and the control unit determines states of the electrodes of the discharge lamp based on a plurality of the inter-electrode voltages measured in the first measurement period.
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