Patent ID: 8223261
Filing Date: 2012-07-17
Classification: H04N

Abstract:
1. An image capture device, comprising: an image capture unit configured for capturing image information in current ambient illumination conditions; a calculation unit configured for reading the information and calculating brightness of the current ambient illumination based upon the information; an assist light configured for lighting to compensate the current ambient illumination; a determination unit configured for determining whether the current ambient illumination is sufficient and whether the current ambient illumination has been compensated; a storage unit configured for storing a first control table, the first control table comprising a collection of current ambient illumination levels and a collection of control settings, where each control setting is associated with a corresponding current ambient illumination level which is associated with a corresponding pulse-width modulation (PWM) duty cycle; a processing unit; and a first assist light control unit; wherein when the determination unit determines that the current ambient illumination is insufficient, the processing unit activates the first assist light control unit, the first assist light control unit acquires the corresponding PWM duty cycle based upon the current ambient illumination determined by the calculation unit and sets the assist light using the acquired PWM duty cycle.