OPTICAL WRITING DEVICE AND IMAGE FORMING APPARATUS

摘要

An optical writing device driving a light-emitting element array, modulating light according to a screening pattern that expresses a dithered image, and performing optical writing by focusing light emitted from the light-emitting element array through a lens array onto a photoreceptor. The optical writing device includes an acquisition unit that acquires a write start position for writing to the photoreceptor in a main scanning direction and a control unit that performs a control when the write start position corresponds to an i-th light-emitting element from a reference position that corresponds to a first light-emitting element in the main scanning direction, i being a positive integer greater than 1, wherein the control unit supplies pixel values to the i-th light-emitting element onwards, the pixel values being assigned from pixels of the screening pattern from an i-th pixel onwards, from a leading pixel of the screening pattern in the main scanning direction.

主权项

1. An optical writing device that drives a light-emitting element array of light-emitting elements, modulating light emitted therefrom according to a screening pattern that expresses an image as a dithered image, the optical writing device performing optical writing by focusing light emitted from the light-emitting element array through a lens array onto a surface of a photoreceptor, the optical writing device comprising:
an acquisition unit that acquires a write start position for writing to the photoreceptor in a main scanning direction; and a control unit that performs a control when the write start position corresponds to an i-th light-emitting element of the light-emitting element array, counting from a reference position that corresponds to a first light-emitting element in ascending numerical order of the light-emitting elements in the main scanning direction, i being a positive integer greater than 1, wherein the control unit supplies pixel values to the i-th light-emitting element onwards, the pixel values being assigned from pixels of the screening pattern from an i-th pixel onwards, counting from a leading pixel in ascending numerical order of the screening pattern in the main scanning direction.