Patent ID: 6226029
Filing Date: 2001-05-01
Classification: H04N

Abstract:
A method of adjusting a slow scan position of a scan line on a photoreceptor, comprising the steps of:producing a light beam;illuminating a light valve assembly having a plurality of independently addressable light valve elements with said light beam, wherein each light valve element selectively blocks or passes a portion of the light beam in response to application of an electrical control signal to that light valve element;sweeping the portion of the light beam that passes said light valve assembly in a scan line across the photoreceptor;sensing an image area on the photoreceptor;after sensing said image area sequentially applying an electrical control signal to said individual light valve elements at a controlled rate;sensing a start of scan position of the sweeping light beam; andholding said electrical control signal on a selected individual light valve element, wherein said selected individual light valve element depends upon a time between said sensing of said image area and said sensing of said start-of-scan.