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image forming device

An image and light beam technology, applied in image communication, electrical recording technology using charge graphics, equipment using electrical recording technology using charge graphics, etc., can solve problems such as central peak inconsistency

Inactive Publication Date: 2014-10-22
KONICA MINOLTA BUSINESS TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if the potential of the PD output changes, the delay time from the rising edge of the COMP output does not change, so there is a concern that the rising edge of the delayed output may not coincide with the central peak value of the PD output.

Method used

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Embodiment Construction

[0038] (Structure of Image Forming Apparatus)

[0039] Hereinafter, an image forming apparatus according to an embodiment of the present invention will be described with reference to the drawings. figure 1 is a diagram showing the overall configuration of the image forming apparatus 1 .

[0040] The image forming apparatus 1 is an electrophotography-based color printer configured to synthesize images of four colors (Y: yellow, M: magenta, C: cyan, and K: black) using a so-called tandem method. This image forming apparatus 1 has a function of forming an image on paper P based on image data read by a scanner, and as figure 1 As shown, it includes a printing unit 2 , a paper feeding unit 15 , a timing roller pair 19 , a fixing device 20 , a paper discharge roller pair 21 , and a paper discharge tray 23 .

[0041] The paper feed unit 15 functions to feed paper (print media) P one by one, and includes a paper tray 16 and a paper feed roller 17 . On the paper tray 16, a plurali...

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PUM

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Abstract

An image forming apparatus having: a light source for emitting a beam; a deflector for deflecting the beam; a light receiving element for receiving the beam and generating a detection signal; a converter for converting electric potentials of the detection signal into data values and generating time data associated with the data values; and a first calculator for calculating a position of center of the beam from the data values and the time data.

Description

technical field [0001] The present invention relates to an image forming apparatus, and more particularly, to an image forming apparatus that scans a light beam emitted from a light source on a photoreceptor after being deflected by a deflecting member. Background technique [0002] As a conventional image forming apparatus, for example, a color image forming apparatus described in Patent Document 1 is known. In this color image forming apparatus, the light intensity of the laser beam is corrected and controlled by the operation described below. Figure 11 It is a waveform diagram when the color image forming apparatus corrects and controls the light intensity of the laser beam. Figure 11 (a) is the output waveform of PD (photodiode), Figure 11 (b) is the output waveform of the COMP circuit, Figure 11 (c) is the output waveform of the delay circuit, Figure 11 (d) is the waveform of the light quantity monitor signal. [0003] If the PD receives laser light, then if Figur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B26/12G03G15/01
CPCG03G15/043H04N1/1135H04N2201/0082H04N2201/04734H04N1/053H04N2201/04713H04N2201/04744H04N1/12H04N2201/04712H04N2201/04749H04N2201/04729G02B26/127H04N1/1916
Inventor 藤田大介有野新平
Owner KONICA MINOLTA BUSINESS TECH INC