Light source lamp lighting device and method
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United States of America Patent
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Mar 17, 2015
Grant Date -
Jun 13, 2013
app pub date -
Sep 1, 2010
filing date -
Sep 1, 2010
priority date (Note) -
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Abstract
A light source lamp lighting device includes a light source lamp, cooling means for cooling the light source lamp, an extinguishing time measurer that calculates extinguishing time information indicating an extinguishing period when the light source lamp was last switched off to a present time, a storage that stores lighting performance, which is a history of successes and failures of lighting the light source lamp, a plurality of cooling times corresponding to an extinguishing period when the light source lamp is switched off indicated by the extinguishing time information as a cooling time for causing the cooling means to operate, and a first threshold set with respect to the lighting performance, and a controller that reads out, in lighting the light source lamp, the lighting performance, the cooling time stored in the storage based on the extinguishing period when the light source lamp is switched off calculated by the extinguishing time measurer, and the first threshold and, when a number of successes of lighting indicated by the lighting performance exceeds the first threshold, subtracts a predetermined time from the read-out cooling time to calculate a cooling time value for causing the cooling means to operate.
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