Patent ID: 8979280
Filing Date: 2015-03-17
Classification: G03B,H01J,H05B

Abstract:
1. A light source lamp lighting device comprising: a light source lamp; cooling means for cooling said light source lamp; an extinguishing time measurer that calculates extinguishing time information indicating an extinguishing period when said light source lamp was last switched off to a present time; a storage that stores lighting performance, which is a history of past successes and failures of lighting said 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 said cooling means to operate, and a first threshold set with respect to the lighting performance; and a controller that reads out, in lighting said light source lamp, the lighting performance, the cooling time stored in said storage based on the extinguishing period when the light source lamp is switched off calculated by said 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 said cooling means to operate.