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Color image forming apparatus

A color image and toner image technology, applied in the field of color image forming devices

Active Publication Date: 2015-10-21
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is directed to a color image forming apparatus capable of solving problems that arise when a power source is shared for a developing unit and a charging unit as discussed in Japanese Patent Application Laid-Open No. 11-102145

Method used

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Embodiment Construction

[0020] Exemplary embodiments, features, and aspects of the present invention will be described in detail below with reference to the accompanying drawings. The constituent elements described in this exemplary embodiment are merely examples of the present invention, and the scope of the present invention is not limited only to these constituent elements.

[0021] First, refer to Figure 1 to Figure 5A , Figure 5B The configuration of a color image forming apparatus (hereinafter, referred to as an image forming apparatus) is described, and, referring to Figure 6 ~ Figure 9A , Figure 9B Describes control operations for weak exposures. Finally, will refer to Figure 10A and Figure 10B Describes the effect of fog volume and image uniformity.

[0022] figure 1 is a cross-sectional view schematically showing the image forming apparatus. will refer to figure 1 The configuration and operation of the image forming apparatus of this exemplary embodiment are described.

[00...

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PUM

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Abstract

In a color image forming apparatus, the amount of light of an exposure unit for a weak exposure is changed according to a remaining service life of a photosensitive drum when the weak exposure is performed for the background area of a corresponding photosensitive drum by using the exposure unit.

Description

[0001] This application is a divisional application based on the patent application with the application number 201210061626.4, the filing date is March 9, 2012, and the invention title is "Color Image Forming Device". technical field [0002] The present invention relates to a color image forming apparatus using an electrophotographic recording method such as a laser printer, copier, facsimile machine. Background technique [0003] Conventionally, image forming apparatuses using electrophotographic recording methods such as copiers and laser printers are known. For such an image forming apparatus, it is required to reduce the manufacturing cost and reduce the size of the apparatus. In this case, for example, Japanese Patent Application Laid-Open No. 11-102145 proposes a monochrome printer in which a voltage is applied to its developing unit and its charging unit from a single common high-voltage power source in order to reduce the size of the device. Contents of the inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/00G03G15/01G03G15/043
CPCG03G15/553G03G15/011G03G15/043G03G15/5087G03G15/55
Inventor 紫村大七泷秀夫小林进介片桐真史渡边泰成长谷川秀明丰泉清人安川航司
Owner CANON KK
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