JP2005041178A5 - - Google Patents

Claims (5)

An exposure unit comprising element rows in which the light emitting elements are arranged in a plurality of rows , the element rows being capable of emitting light for each row;
A photoreceptor on which an electrostatic latent image is formed by exposure light of the exposure means;
Developing means for supplying toner to the electrostatic latent image to form a toner image on the photoreceptor;
Wherein the plurality of the element array to be used for printing from among the element array one selects, electrophotographic apparatus characterized by a control means for controlling the driving start timing of the exposure means in accordance with a selection result . The exposure means is provided in each of a plurality of image forming stations corresponding to a plurality of recording colors,
The control means selects one of the element rows to be used for printing from among the plurality of element rows for each of the plurality of exposure means, according to printing conditions including a print resolution designated by the user, 2. An electrophotographic apparatus according to claim 1, wherein color misregistration correction is performed by controlling the drive start timing of each exposure means in accordance with the selection result. The control means creates a color misregistration detection pattern in any one of the plurality of element arrays, generates a first exposure start timing for each color based on the detection timing of the color misregistration detection pattern, 3. The electrophotographic apparatus according to claim 2, wherein printing is performed using the element array at the first exposure start timing. The control means generates a second exposure start timing by adding or subtracting a constant determined from an interval between the plurality of element arrays and an image forming speed to the first exposure start timing. 4. The electrophotographic apparatus according to claim 2, wherein printing is performed using an element array other than the element array used for creating the color misregistration detection pattern at an exposure start timing. 2. The electrophotographic apparatus according to claim 1, wherein the plurality of element rows are composed of light emitting elements arranged in a staggered manner.