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US 2008/0260398 A1Published application
Image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorIsami Itoh
Life of this patent
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Abstract
An image forming apparatus includes temperature sensors that measure temperatures at different locations in the longitudinal direction of a photosensitive drum. The image forming apparatus also includes an image processing circuit configured to change an exposure condition in the longitudinal direction of the photosensitive drum based on measured values obtained by the temperature sensors.
Claims8
An image forming apparatus comprising:
- a photo conductor;
- a charging device configured to charge a surface of the photo conductor;
- an exposure device configured to expose the charged surface of the photo conductor and to form an electrostatic image thereon;
- a developing device configured to attach toner to the electrostatic image and to develop the electrostatic image as a toner image;
- a temperature measuring device configured to measure temperatures in at least two different locations in a longitudinal direction of the photo conductor;
- and
- a control device configured to control an exposure condition for exposure performed by the exposure device in accordance with image information, the control device being operable to change the exposure condition for exposure performed by the exposure device in the longitudinal direction of the photo conductor based on a measurement result of the temperature measuring device.
4 more elements
An image forming method comprising:
- charging a surface of a photo conductor;
- exposing the charged surface of the photo conductor to form an electrostatic image thereon;
- attaching toner to the electrostatic image and developing the electrostatic image as a toner image;
- measuring temperatures in at least two different locations in a longitudinal direction of the photo conductor;
- and
- controlling an exposure condition for such exposure in accordance with image information, including changing the exposure condition for the exposure in the longitudinal direction of the photo conductor based on the measured temperatures.
3 more elements
Dependencies are inferred from the claim text.