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US 7,256,814 B2Granted
Image forming apparatus and image forming method
AssigneeSeiko Epson Corporation
InventorsKiyoshi Tsujino, Yujiro Nomura, Ken Ikuma
Life of this patent
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Abstract
In an image forming apparatus, an image carrier is configured to rotate in a first direction. An image writer is adapted to irradiate the image carrier to form an electrostatic latent image thereon. A storage stores information regarding a factor disturbing the formation of the latent image in advance. A controller controls the irradiation of the image writer so as to eliminate the disturbing factor, based on the information stored in the storage.
Claims14
An image forming apparatus comprising:
- an image carrier, configured to rotate in a first direction;
- an image writer, adapted to irradiate the image carrier to form an electrostatic latent image thereon;
- a storage, which stores information regarding a factor disturbing the formation of the latent image in advance;
- a controller, which controls the irradiation of the image writer so as to eliminate the disturbing factor, based on the information stored in the storage;
- a developer, which develops the latent image as a visible toner image;
- and
- a density sensor, which detects a density change in the toner image,
- wherein the disturbing information is obtained from the density change.
5 more elements
An image forming apparatus comprising:
- an image carrier, configured to rotate in a first direction;
- an image writer, adapted to irradiate the image carrier to form an electrostatic latent image thereon;
- a storage, which stores information regarding a factor disturbing the formation of the latent image in advance, wherein the disturbing factor is generated synchronously with an operation sequence of the image formation apparatus and in accordance with vibrations in the apparatus;
- and
- a controller, which controls the irradiation of the image writer so as to eliminate the disturbing factor, based on the information stored in the storage,
- wherein the controller controls a timing at which the formation of the latent image is performed, when the vibrations are generated, and
- wherein the controller does not perform the formation of the latent image for a first part of the image carrier corresponding to a first timing when the vibrations are generated, and performs a subsequent formation of the latent image for both of the first part of the image carrier and a second part of the image carrier subsequent to the first part.
4 more elements
An image forming apparatus comprising:
- an image carrier, configured to rotate in a first direction;
- an image writer, adapted to irradiate the image carrier to form an electrostatic latent image thereon;
- a storage, which stores information regarding a factor disturbing the formation of the latent image in advance, wherein the disturbing factor is generated synchronously with an operation sequence of the image formation apparatus and in accordance with fluctuations of a circumferential speed of the rotation of the image carrier;
- and
- a controller, which controls the irradiation of the image writer so as to eliminate the disturbing factor, based on the information stored in the storage,
- wherein the controller controls an exposure amount for a part where the latent image is formed at a timing when the circumferential speed fluctuates.
3 more elements
An, image forming apparatus comprising:
- an image carrier, configured to rotate in a first direction;
- an image writer, adapted to irradiate the image carrier to form an electrostatic latent image thereon;
- a storage, which stores information regarding a factor disturbing the formation of the latent image in advance;
- and
- a controller, which controls the irradiation of the image writer so as to eliminate the disturbing factor, based on the information stored in the storage,
- wherein the image writer is a line head in which a plurality of light emitter arrays are arranged in the first direction,
- wherein each of the light emitter arrays includes a plurality of light emitters arrayed in a second direction perpendicular to the first direction, and
- wherein each of the light emitters is an organic electro luminescence type element.
5 more elements
An image forming method comprising steps of:
- providing an image carrier configured to rotate in a first direction;
- providing an image writer, adapted to irradiate the image carrier to form an electrostatic latent image thereon;
- storing information regarding a factor disturbing the formation of the latent image in a storage in advance;
- controlling the irradiation of the image writer so as to eliminate the disturbing factor, based on the information stored in the storage;
- developing the latent image as a visible toner image;
- detecting a density change in the toner image;
- and
- obtaining the disturbing information from the density change.
5 more elements
An image forming method comprising steps of:
- providing an image carrier configured to rotate in a first direction;
- providing an image writer, adapted to irradiate the image carrier to form an electrostatic latent image thereon;
- storing information regarding a factor disturbing the formation of the latent image in a storage in advance, wherein the disturbing factor is generated synchronously with an operation sequence of the image formation apparatus and in accordance with vibrations in the apparatus;
- and
- controlling the irradiation of the image writer so as to eliminate the disturbing factor, based on the information stored in the storage,
- wherein a timing at which the formation of the latent image is performed is controlled, when the vibrations are generated, and
- wherein the formation of the latent image is not performed for a first part of the image carrier corresponding to a first timing when the vibrations are generated, and a subsequent formation of the latent image is performed for both of the first part of the image carrier and a second part of the image carrier subsequent to the first part.
4 more elements
An image forming method comprising steps of:
- providing an image carrier configured to rotate in a first direction;
- providing an image writer, adapted to irradiate the image carrier to form an electrostatic latent image thereon;
- storing information regarding a factor disturbing the formation of the latent image in a storage in advance, wherein the disturbing factor is generated synchronously with an operation sequence of the image formation apparatus and in accordance with fluctuations of a circumferential speed of the rotation of the image carrier;
- and
- controlling the irradiation of the image writer so as to eliminate the disturbing factor, based on the information stored in the storage,
- wherein an exposure amount for a part where the latent image is formed is controlled at a timing when the circumferential speed fluctuates.
3 more elements
Dependencies are inferred from the claim text.