Patent ID: 8502476
Filing Date: 2013-08-06
Classification: G09G,H05B

Abstract:
1. A method of controlling power consumption of a light source in a mobile projector, the method comprising the steps of: calculating power consumption of the light source; and comparing the calculated power consumption of the light source with a preset power value and adjusting current flowing to the light source according to a resultant value of the comparison, wherein calculating power consumption of the light source comprises: measuring a voltage applied to both terminals of the light source, measuring the current flowing to the light source, and calculating the power consumption of the light source by multiplying the measured voltage and current, and wherein adjusting current flowing to the light source comprises: calculating a difference value between the preset power value and the calculated power consumption of the light source; adding/subtracting the calculated difference value to/from a preset current value to output a resultant value; and changing voltage output to the light source according to the output resultant value.