Patent ID: 8305336
Filing Date: 2012-11-06
Classification: G09G,H05B

Abstract:
1. A method of driving a light source, the method comprising: generating sensing data by sensing an amount of light generated from the light source; converting the sensing data that exceeds a maximum value of reference data of a control range into converted sensing data within the control range; generating a control signal that controls the amount of light generated from the light source based upon the sensing data corresponding to no more than the maximum value or based upon the converted sensing data; and driving the light source by a driving signal based upon the control signal, wherein a relationship between the sensing data and a duty cycle of the driving signal is linear, and a relationship between the reference data and the duty cycle of the driving signal is linear, and wherein generating the control signal comprises: when the sensing data is substantially equal to or exceeds the maximum value of the reference data, obtaining a duty cycle value of the driving signal corresponding to the sensing data; calculating a slope of the sensing data as a function of the duty cycle of the driving signal; and converting the sensing data into the converted sensing data within the control range based upon the slope.