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Image forming device, and image density stabilization control method

一种图像浓度、控制方法的技术，应用在应用电荷图形的电记录工艺、应用电荷图形的电记录工艺的设备、仪器等方向，能够解决图像浓度变化、调色剂静电附着力变化等问题，达到降低图像浓度变化的效果

Active Publication Date: 2020-01-21
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] It is known that when an electrophotographic image forming apparatus is left in a low-humidity environment, the charging potential of the photosensitive drum may decrease immediately after the application of charging to the photosensitive drum, and the electrostatic adhesion of the toner may change due to this phenomenon. thus prone to image density variations

Method used

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  • Image forming device, and image density stabilization control method
  • Image forming device, and image density stabilization control method
  • Image forming device, and image density stabilization control method

Examples

Experimental program
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no. 1 approach 〕

[0046] based on Figure 1 ~ Figure 3 Next, the digital multifunction peripheral 1 which is an embodiment of the image forming apparatus of the present invention will be described.

[0047] figure 1 It is a perspective view showing the appearance of a digital multifunction peripheral 1 which is an embodiment of the image forming apparatus of the present invention. figure 2 To represent figure 1 A cross-sectional view of the structure of the main body of the digital multifunction peripheral 1 shown.

[0048] The digital multifunction machine 1 is a device such as MFP (Multifunctional Peripheral: Multifunctional Peripheral) that performs digital processing of image data and has a copy function, a scanner function, and a fax function (refer to figure 1 ).

[0049] Such as figure 2 As shown, the digital multifunction peripheral 1 includes a document conveying device 112 that conveys a document to a reading unit, a document reading device 111 that reads a document, and an image forming un...

no. 2 approach 〕

[0162] Then, based on Figure 15 An example of image density stabilization control in the digital multifunction peripheral 1 according to the second embodiment will be described.

[0163] Figure 15 This is a graph showing the change in the charged potential of the photoreceptor drum 13 when printing is performed on two sheets of paper in the digital multifunction peripheral 1 according to the second embodiment and an example of its correction.

[0164] The change in the charged potential of the photosensitive drum 13 when printing on two sheets of paper is as Figure 15 As shown in the chart.

[0165] In addition, for simplification, the first sheet of paper is printed until 100 milliseconds, and the second sheet of paper is printed until 200 milliseconds.

[0166] in Figure 15 In the graph of, the horizontal axis represents the charging time (milliseconds), and the vertical axis represents the charging potential (-V) of the photosensitive drum 13. The closer the charged potential is...

no. 3 approach 〕

[0173] Then, based on Figure 16 An example of the image density stabilization control in the digital multifunction peripheral 1 according to the third embodiment will be described.

[0174] Figure 16 This is a graph showing an example of the change in the charged potential of each density portion of the photosensitive drum 13 in the digital multifunction peripheral 1 according to the third embodiment.

[0175] The change in the charged potential of the photosensitive drum 13 when the correction is applied without correction is as Figure 16 As shown in the chart.

[0176] in Figure 16 In the graph of, the horizontal axis represents the change in the charge potential of the photoreceptor drum 13 in the low-density portion, the middle-density portion, and the high-density portion, and the vertical axis represents the charge potential (V) of the photoreceptor drum 13.

[0177] In addition, in each concentration section, when the correction is not performed in order from the left, it in...

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Abstract

An image forming apparatus forms an image by an electronic photograph method, including: a photosensitive body; a charger that charges the photosensitive body at the time of printing; a charged potential fluctuation prediction unit that predicts an amount of fluctuation in a charged potential of the photosensitive body; an optical scanning device that irradiates the photosensitive body with an exposure laser and forms an electrostatic latent image; a development device that develops the electrostatic latent image; and an exposure laser output correction unit that corrects an output of the exposure laser; wherein the charged potential fluctuation prediction unit predicts, from a charging stop time, the amount of fluctuation in the charged potential after printing has been stopped, and the exposure laser output correction unit reduces a change in density of the image caused by a fluctuation in the charged potential by correcting the output of the exposure laser to be irradiated with respect to the photosensitive body according to the amount of fluctuation in the charged potential.

Description

Technical field [0001] The present invention relates to an image forming apparatus, an image density stabilization control method, an image density stabilization control program, and a recording medium. More specifically, it relates to an electrophotographic image forming device, and an electrophotographic image forming device. An image density stabilization control method, an image density stabilization control program, and a recording medium. Background technique [0002] It is known that when an electrophotographic image forming apparatus is placed in a low-humidity environment, the charging potential immediately after the completion of the charging application to the photosensitive drum may decrease, and this phenomenon may change the electrostatic adhesion of the toner. Therefore, the image density changes easily. [0003] In particular, when the potential of the photoreceptor changes immediately after the charging application is completed, the image density of the first and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/043G03G15/00
CPCG03G15/043G03G15/50G03G15/55G03G15/0266G03G21/203
Inventor 西村泰浩
Owner SHARP KK
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