Image forming apparatus
AssigneeKYOCERA Document Solutions Inc.
InventorsJun NAKAI, Kenshin MATSUUCHI
Life of this patent
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Abstract
A control unit determines a displacement of writing start positions based the density of a correction image, adjusts timings of light emission of light-emitting elements and thereby corrects the displacement of the writing start positions. When the control unit performs correction processing, the control unit performs at least one of first processing and second processing. The control unit performs the first processing by determining, based on the density of a first image, whether unevenness in image density occurs on a surface to be scanned. The control unit performs the second processing by determining, based on the density of a second image, whether a light amount abnormality occurs in any one of a plurality of light-emitting elements.
Claims7
An image forming apparatus comprising:
- an image carrying member that includes a surface to be scanned;
- an optical scanning device that
- includes a plurality of light-emitting elements arranged in a line at regular intervals and at a predetermined angle relative to a main scanning direction, and
- scans the surface to be scanned with light beams emitted from the plurality of light-emitting elements to form an electrostatic latent image on the surface to be scanned;
- a development device that develops the electrostatic latent image using a toner to form a toner image;
- and
- a control unit that performs correction processing to correct a displacement of writing start positions of the plurality of light-emitting elements in the main scanning direction relative to the surface to be scanned,
- wherein the control unit performs the correction processing by
- causing the optical scanning device and the development device to form a correction image that is the toner image used in the correction processing,
- determining the displacement of the writing start positions based on a density of the correction image and
- adjusting timings of light emission of the plurality of light-emitting elements based on the displacement of the writing start positions determined to correct the displacement of the writing start positions,
- when the control unit performs the correction processing, the control unit performs at least one of first processing and second processing,
- the control unit performs the first processing by
- causing the optical scanning device and the development device to form a first image that is the toner image used in the first processing, and
- determining, based on a density of the first image, whether unevenness in image density occurs on the surface to be scanned and
- the control unit performs the second processing by
- causing the optical scanning device and the development device to form a second image that is the toner image used in the second processing, and
- determining, based on a density of the second image, whether a light amount abnormality occurs in any one of the plurality of light-emitting elements.
Dependencies are inferred from the claim text.