Patent ID: 7417660
Filing Date: 2008-08-26
Classification: H04N

Abstract:
1. An electrophotographic image forming apparatus comprising: a photosensitive material; a light source exposing a printed image on the photosensitive material; a driving unit blinking and driving the light source; a generating unit configured to generate a multi-valued image signal including continuous n-number pieces of first pixel data by image processing; a data outputting unit configured to output data corresponding to the multi-valued image signal generated by the generating unit; and a converting unit configured to convert the output data into a pulse width signal including continuous m-number pieces of second pixel data via a predetermined pulse growth method, wherein the driving unit blinks and drives the light source based on the pulse width signal, and wherein a ratio of a resolution between the multi-valued image signal and the exposed printed image is n:m, and n>m (n and m are natural numbers).