Patent ID: 8159569
Filing Date: 2012-04-17
Classification: H04N

Abstract:
1. A circuit for processing an image abnormality caused by power supply, used in a digital image-capturing apparatus, comprising: a digital signal processor (DSP); an analogue front-end (AFE) processing unit, comprising a horizontal driver, and mutually communicated with the DSP, wherein the DSP or the AFE processing unit outputs a pulse-width modulation (PWM) signal; an image-capturing unit, mutually communicated with the DSP, and driven by the horizontal driver; a voltage current regulation unit, at least providing a voltage and a current to the AFE processing unit; a power supply circuit, providing power to the voltage current regulation unit; and a dummy loading device that bears an inrush current noise of the current, connected to an output terminal of the voltage current regulation unit, wherein during a predetermined time section just before a start of transmitting a horizontal shift clock by the AFE to the image-capturing unit, the dummy loading device is set at a turned-on state under control of the PWM signal within the predetermined time section, and the dummy loading device is set at a turned-off state other than the predetermined time section whereby the circuit processes an image abnormality caused by the power supply.