Patent ID: 7515169
Filing Date: 2009-04-07
Classification: B41J

Abstract:
1. A beam light scanning apparatus comprising: a light emitting unit configured to emit a beam light for scan; an image data supplying unit configured to process and supply image data of a target image in each line in a direction of main scan in response to a sync signal; a delayed acquisition unit configured to acquire the image data supplied from the image data supplying unit after a certain time from generation of the sync signal; and a control unit configured to control operation of the light emitting means by a driving signal which is generated based on the image data outputted from the delayed acquisition unit, wherein the delayed acquisition unit comprises: wherein a frequency of a write data clock of the two memories is a half of a frequency of a data read clock of the two memories, and wherein a writing pointer and a reading pointer of the two memories are cleared whenever one line has been formed in synchronism with the sync signal.