Exposure device and image forming apparatus, with driving unit setting barycentric position
AssigneeRicoh Company, Ltd.
InventorShigeaki Imai
Life of this patent
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Abstract
Each of a plurality of pixels is formed with a group of a plurality of spots or a single spot. The barycentric position of each pixel is determined by the distribution of the spots or the position of the single spot. While the number of pixels on the exposure object is maintained in a first direction corresponding to the array direction of the light sources, an exposure feasible width on an exposure object can be adjusted in the first direction by setting the barycentric position at least in the first direction out of the first direction and a second direction that is the moving direction of the exposure object.
Claims13
An exposure device comprising:
- an exposure unit including a plurality of light sources linearly arranged;
- and
- a driving unit that is configured to drive each of the light sources to make the exposure unit expose an exposure object,
- wherein the exposure device forms a plurality of pixels with spots on the exposure object at a position corresponding to the light sources,
- each of the pixels is formed with a group of a plurality of spots or a single spot,
- a barycentric position of each of the pixels is determined by distribution of the spots or a position of the single spot, and
- while the driving unit maintains number of pixels on the exposure object in a first direction corresponding to an array direction of the light sources, an exposure feasible width within which the exposure unit performs exposure on the exposure object is adjustable in the first direction by the driving unit setting the barycentric position at least in the first direction out of the first direction and a second direction that is a moving direction of the exposure object.
Dependencies are inferred from the claim text.