Patent ID: 6788320
Filing Date: 2004-09-07
Classification: G06K,H04N

Abstract:
An image formation apparatus comprising:a writing control unit that line scans an image holder in a predetermined period with optical beams emitted from a light source of which lighting is controlled corresponding to each image data of a plurality of colors, and forms one image by superimposing written images of respective colors; a synchronous detecting unit that detects each scanning optical beam and generates a writing reference synchronization signal; and a mark pulse generating unit that generates a mark pulse at a predetermined timing from the writing reference synchronization signal, wherein the writing control unit has a time measuring unit that measures a time from a writing reference signal generated in a color determined as a reference from among a plurality of colors to a mark pulse generated in other color, and a registration adjusting unit that adjusts a registration of each of other colors based on a change in a measured time when this change has occurred.