Image forming device
AssigneesToshiba Tec Kabushiki Kaisha, Kabushiki Kaisha Toshiba
InventorTAKAHIRO HAMANAKA
Life of this patent
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Abstract
An image forming device includes a photoreceptor drum including a target surface that is scanned in a main scanning direction and a sub-scanning direction, an exposure head including a plurality of light emitting segments aligned in parallel to the main scanning direction, an exposure driving unit which selectively drives the plural light emitting segments, a storing unit which stores a profile where the respective positions of the plural light emitting segments correspond to a correction amount from the main scanning direction toward the sub-scanning direction at every position, and a correcting unit which smoothes a local change of the correction amount in the profile.
Claims20
An image forming device comprising:
- a photoreceptor drum including a photoreceptor having a target surface that is scanned in a main scanning direction and a sub-scanning direction orthogonal to the main scanning direction;
- an exposure head including a plurality of light emitting segments aligned in parallel to the main scanning direction of the photoreceptor drum, wherein each light emitting segment includes a plurality of light emitting elements;
- an exposure driving unit configured to adjust an image writing position on the target surface in the sub-scanning direction and to selectively drive the plural light emitting segments;
- a storing unit configured to store a profile in which a respective position of each of the plural light emitting segments corresponds to a correction amount from the main scanning direction toward the sub-scanning direction at every position;
- and
- a correcting unit configured to smooth a local change of the correction amount in the profile according to at least one of a first difference between the correction amount for a local light emitting segment and the correction amount for a first light emitting segment proximate the local light emitting segment in a first direction and a second difference between the correction amount for the local light emitting segment and the correction amount for a second light emitting segment proximate the local light emitting segment in a second direction opposite the first direction.
An image forming method comprising:
- exposing a photoreceptor drum with a plurality of light emitting segments aligned in parallel to a main scanning direction, wherein each light emitting segment includes a plurality of light emitting elements, and wherein the photoreceptor drum includes a photoreceptor having a target surface that is scanned in the main scanning direction and a sub-scanning direction orthogonal to the main scanning direction;
- adjusting an image writing position on the target surface in the sub-scanning direction and selectively driving the plural light emitting segments;
- storing a profile in which a respective position of each of the plural light emitting segments corresponds to a correction amount from the main scanning direction toward the sub-scanning direction at every position;
- and
- smoothing a local change of the correction amount in the stored profile according to at least one of a first difference between the correction amount for a local light emitting segment and the correction amount for a first light emitting segment proximate the local light emitting segment in a first direction and a second difference between the correction amount for the local light emitting segment and the correction amount for a second light emitting segment proximate the local light emitting segment in a second direction opposite the first direction.
A non-transitory computer-readable medium storing instructions for an image forming device, the instructions causing the image forming device to perform the steps of:
- exposing a photoreceptor drum with a plurality of light emitting segments aligned in parallel to a main scanning direction, wherein each light emitting segment includes a plurality of light emitting elements, and wherein the photoreceptor drum includes a photoreceptor having a target surface that is scanned in the main scanning direction and a sub-scanning direction orthogonal to the main scanning direction;
- adjusting an image writing position on the target surface in the sub-scanning direction and selectively driving the plural light emitting segments;
- storing a profile in which a respective position of each of the plural light emitting segments corresponds to a correction amount from the main scanning direction toward the sub-scanning direction at every position;
- and
- smoothing a local change of the correction amount in the stored profile according to at least one of a first difference between the correction amount for a local light emitting segment and the correction amount for a first light emitting segment proximate the local light emitting segment in a first direction and a second difference between the correction amount for the local light emitting segment and the correction amount for a second light emitting segment proximate the local light emitting segment in a second direction opposite the first direction.
Dependencies are inferred from the claim text.