Patent ID: 8148914
Filing Date: 2012-04-03
Classification: H05B,Y02B

Abstract:
1. A circuit for driving a light source, said circuit comprising: an input signal provider portion operable to provide a DACzero input signal having a frequency and a DACzero input signal duty cycle including a DACzero input signal high portion and a DACzero input signal low portion; an enabling signal providing portion operable to provide an enabling signal having the frequency and an enabling signal duty cycle including an enabling signal high portion and an enabling signal low portion, the enabling signal duty cycle being larger than the DACzero input signal duty cycle; a digital-to-analog converter operable to receive a digital input signal and to generate an analog signal based on the DACzero input signal, the enabling signal and the digital input signal; and a driving portion operable to generate a driving signal to drive the light source, the driving signal being based on the analog signal.