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Image forming apparatus and image forming method

An image and equipment technology, applied in the field of image forming equipment, to achieve the effect of reducing power consumption, reducing power, and simple settings

Active Publication Date: 2019-12-24
FUJIFILM BUSINESS INNOVATION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, although the power consumption itself is reduced in this case, the image quality difference tends to be between a toner image developed by using a developing bias whose potential is alternately changed and a toner image developed by using a developing bias whose potential is kept constant. occurs between toner images of

Method used

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  • Image forming apparatus and image forming method
  • Image forming apparatus and image forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0048] figure 1 The overall configuration of the image forming apparatus 1 according to the exemplary embodiment is illustrated.

[0049] The image forming apparatus 1 includes: an image forming section 10 , a paper supply section 20 , a fixing section 30 , and a controller 100 . The image forming section 10 forms a monochrome (for example, black) toner image via an electrophotographic system. The paper supply unit 20 supplies paper P toward the image forming unit 10 . The fixing unit 30 fixes the image (toner image) formed on the paper P by the image forming unit 10 . The controller 100 controls operations of various parts of the image forming apparatus 1 .

[0050] The image forming section 10 has figure 1 The photosensitive drum 11 is rotatable in the direction indicated by the arrow A in it. The image forming section 10 also has a charging roller 12 , an exposure device 13 , a developing device 14 , a transfer roller 15 , and a cleaning device 16 disposed around the p...

Embodiment approach 2

[0107] In Exemplary Embodiment 1, a configuration is employed in which, as the power saving AC developing bias VAr used in the power saving mode, the supply of the AC reference value VA0 in the reference output period Z0 and the supply of the AC reference value VAr in the special output period Z1 are alternately performed. AC special value VA1. In other words, in Exemplary Embodiment 1, the power-saving AC developing bias Var has two values ​​(AC reference value VA0 and AC special value VA1 ). In contrast, in Exemplary Embodiment 2, the power saving AC developing bias VAr is multi-valued. In Exemplary Embodiment 2, components or features similar to those in Exemplary Embodiment 1 are denoted by the same symbols, and detailed descriptions of these components or features are omitted.

[0108] The development mode according to Exemplary Embodiment 2 will be described in more detail below.

[0109] Figure 9A An example of the waveform of the normal AC developing bias VAs used ...

Embodiment approach 3

[0119] In Exemplary Embodiments 1 and 2, designation of the normal mode or the power saving mode is received from the user, and the AC developing bias VA to be supplied is changed between the normal mode and the power saving mode. In contrast, in Exemplary Embodiment 3, the kind of AC developing bias VA to be supplied is set according to the type of image formed on the photosensitive drum 11 . In Exemplary Embodiment 3, components or features similar to those in Exemplary Embodiments 1 and 2 are denoted by the same symbols, and detailed descriptions of these components or features are omitted.

[0120] Figure 10 is a flowchart illustrating steps for setting the developing conditions in the image forming operation according to Exemplary Embodiment 3.

[0121] In this process, first, the controller 100 acquires image data input from the image processing section 40, and analyzes the acquired image data (step 110). In step 110, the controller 100 analyzes the acquired image dat...

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Abstract

An image forming apparatus includes an image carrier, a developing part that develops an electrostatic latent image formed on the image carrier by using toner, a supply part that supplies a developing bias between the image carrier and the developing part, the developing bias having an AC component superimposed on a DC component, and a setting part that sets a peak-to-peak value of the AC component of the developing bias to vary between a reference value that is determined in advance and a special value smaller than the reference value when an image region on the image carrier passes through a developing region, the image region being a region on the image carrier in which an image is to be formed, the developing region being a region in which the image carrier is opposed to the developing part.

Description

technical field [0001] The present invention relates to an image forming apparatus and an image forming method. Background technique [0002] As an example of the related art described in the literature, there is a developing device including a developing roller for attaching toner to an electrostatic latent image formed on a photoreceptor, and in which an AC bias can be supplied to the developing roll. In the developing device, the supply of the AC bias voltage is turned on for the image area (image portion) of the photoreceptor, and is turned off for the non-image area (inter-image portion) of the photoreceptor (see Japanese Unexamined Utility Model Registration Application No. 63-060160 Bulletin). [0003] As another example of the related art described in the literature, there is an image forming apparatus including a photosensitive drum, and a developing roller disposed opposite to the photosensitive drum. In the image forming apparatus, as a developing bias voltage ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/08G03G15/06
CPCG03G15/065G03G15/0806G03G2215/0634
Inventor 太田大介
Owner FUJIFILM BUSINESS INNOVATION CORP
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