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Image forming apparatus

An image, two-component technology, which is applied to the electrical recording process using charge patterns, equipment and instruments of the electrical recording process applying charge patterns, etc. , Inability to properly set the set value of the processing speed, etc.

Inactive Publication Date: 2008-09-10
SHARP KK
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Since the coefficients determined at the initial stage are used even after the start of image formation, time-dependent changes (that is, changes over time) are not fully considered, and other processing speeds after the start of image formation cannot be appropriately set. setpoint problem
If the setting value of the toner concentration sensor is not properly set, the toner concentration in the developing tank cannot be detected accurately, which will affect the toner supply and image density, and cause the quality of the output image to decline

Method used

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Embodiment Construction

[0044] Preferred embodiments of the present invention will be described in detail below with reference to the drawings.

[0045] FIG. 1 is a schematic cross-sectional view showing the structure of an image forming apparatus 1 as one embodiment of the present invention. FIG. 2 is a block diagram schematically showing the electrical configuration of the image forming apparatus 1 as one embodiment of the present invention. The image forming apparatus 1 is a multifunction peripheral having both a printing function and a facsimile function, and forms a full-color or black-and-white image on a recording medium according to transmitted image information. That is, in the image forming apparatus 1, there are two types of printing modes: a printing mode and a facsimile mode. The control unit 84 selects the print mode or the facsimile mode for receiving a print job from an external device or the like.

[0046] In addition, the image forming apparatus 1 is provided with three printing m...

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Abstract

An image forming apparatus is provided which is capable of forming higher-quality images by detecting a toner concentration with higher accuracy to attain appropriate toner supply and image density. A value obtained by adding a correction value based on a temperature, humidity, a print coverage, or the like to a developer concentration adjustment value is set as a control voltage value Vc which is to be inputted to a toner concentration sensor, and an output value of the toner concentration sensor is detected for each of process speeds. A difference between the output value detected and a value at reference process speed is calculated and based on the difference, a correction value is further calculated. Such another calculation of the correction value with use of the output value detected allows for highly accurate correction.

Description

technical field [0001] The present invention relates to an image forming apparatus that forms an image by electrophotography. Background technique [0002] Electrophotographic image forming apparatuses can form high-quality images in a relatively short period of time with simple operations, and are easy to maintain and manage. Therefore, they are widely used as copiers, printers, facsimiles, and the like, for example. An electrophotographic image forming device includes, for example, a photoreceptor, a charging device, an exposure device, a developing device, a transfer device, a fixing device, and a cleaning device. The photoreceptor is a roll-shaped member with a photosensitive film formed on its surface. The charging device receives voltage application and charges the surface of the photoreceptor to a predetermined potential. The exposure device irradiates signal light corresponding to image information to the charged surface of the photoreceptor to form an electrostati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08G03G15/01G03G15/00
CPCG03G15/0849G03G15/0853G03G15/5008G03G15/0824G03G2215/00084
Inventor 糸山元幸藤田庄一村田充弘
Owner SHARP KK
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