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High voltage power supply and image forming apparatus

A high-voltage power supply, electrostatic latent image technology, applied in the direction of electric recording process applying charge pattern, equipment for applying electric recording process of charge pattern, electric recording technique, etc., can solve the quality deterioration of toner image, excess developer, etc. question

Inactive Publication Date: 2013-12-18
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the amount of developer supplied to the photoreceptor may be excessive or insufficient, resulting in deterioration of the quality of the toner image formed on the photoreceptor.

Method used

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  • High voltage power supply and image forming apparatus
  • High voltage power supply and image forming apparatus
  • High voltage power supply and image forming apparatus

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Embodiment Construction

[0015] Embodiments according to the present invention will be described below based on the drawings. figure 1 It is a schematic cross-sectional view of a printer 1 which is an embodiment of an image forming apparatus including a high-voltage power supply device according to the present invention.

[0016] Such as figure 1 As shown, the printer 1 includes a box-shaped device body 1a. A paper feeding unit 2 for feeding paper P, an image forming unit 3 , and a fixing unit 4 are provided in the apparatus main body 1 a. The image forming unit 3 transfers a toner image based on image data or the like to the paper P while conveying the paper P supplied from the paper feeding unit 2 . The fixing unit 4 performs fixing processing for fixing the toner image transferred onto the paper P by the image forming unit 3 to the paper P. In addition, a paper discharge unit 5 that discharges the paper P subjected to the fixing process by the fixing unit 4 is provided on the upper surface of th...

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PUM

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Abstract

A high voltage power supply includes a developer carrier, an image carrier, a developing control unit, a load detection unit, a variation detection unit, and a voltage correction unit. The developing control unit applies a developing bias voltage to the developer carrier and thereby supplies the developer to the image carrier and develops an electrostatic latent image. The variation detection unit detects the variation in capacitance between the developer carrier and the image carrier detected by the load detection unit. The voltage correction unit corrects the developing bias voltage by decreasing the developing bias voltage as the variation increases, and increasing the developing bias voltage as the variation decreases.

Description

technical field [0001] The present invention relates to a high-voltage power supply device and an image forming device, in particular to a technique for correcting developing bias voltage. Background technique [0002] Conventionally, a technique is known in which the intensity of the electric field generated between a photoreceptor (image carrier) and a developing roller is adjusted by applying a developing bias obtained by superimposing a DC voltage and an AC voltage to a developing roller (developer carrier). Maintaining fixed to develop the electrostatic latent image, thereby suppressing deterioration of image quality. The DC voltage and the AC voltage are optimally set according to, for example, the magnetic strength of the developer (toner image), the photosensitive material forming the surface of the photoreceptor (for example, amorphous silicon), and the like. [0003] Even if an optimum developing bias is applied, in the case where the distance between the photorec...

Claims

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Application Information

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IPC IPC(8): G03G15/00
CPCG03G15/065G03G15/5037G03G15/5045G03G2215/00772
Inventor 冈田雅典
Owner KYOCERA DOCUMENT SOLUTIONS INC