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Light source control apparatus and method, image reading apparatus, image forming apparatus

A light source control and light source technology, which is applied to light sources, electric light sources, measuring devices, etc., can solve the problems of improving image reading accuracy and inability to effectively adjust the amount of light.

Inactive Publication Date: 2013-02-20
FUJIFILM BUSINESS INNOVATION CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the above-mentioned conventional technology, when there is an individual difference in the light quantity of the LED as a light source for image reading, or when the light quantity of the LED changes with time, it is impossible to effectively adjust the light quantity emitted from the LED and improve Accuracy of image reading

Method used

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  • Light source control apparatus and method, image reading apparatus, image forming apparatus
  • Light source control apparatus and method, image reading apparatus, image forming apparatus
  • Light source control apparatus and method, image reading apparatus, image forming apparatus

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Embodiment Construction

[0030] Next, exemplary embodiments of the present invention will be described based on the drawings.

[0031] figure 1 The structure of the image forming apparatus 10 is shown. The image forming apparatus 10 is, for example, a color image forming apparatus having an image forming section 12 and a document reader 14 . The image forming section 12 is, for example, an electrophotographic unit having a paper feed tray 16 on which paper such as paper is stacked. An image is formed on the paper fed from the paper feed tray 16 onto the paper transport path 20 .

[0032] More specifically, the image forming section 12 has the following components: an image holding body 22 having a photoreceptor; a charger 24 for uniformly charging the image holding body 22; 24, a latent image is formed on the uniformly charged image holder 22; a developing device 28 for making the latent image formed by the exposure device 26 on the image holder 22 visible using toner; The toner image formed by th...

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Abstract

A light source control apparatus that includes a light quantity detection unit that respectively detects light quantities of three colors of light emitted from a light source part. A light quantity ratio calculation unit that then calculates light quantity ratios of reflection light detected by the light quantity detection unit. When the light quantity detection unit detects light quantities of respective reference of the lights emitted from the light source part, a determination unit determines whether or not the light quantity ratios calculated by the light quantity ratio calculation unit are within a predetermined range. Responsive to the determination of the determining unit, a light quantity ratio adjustment unit adjusts the light quantity ratios of the lights emitted from the light source part on the basis of the light quantity of green-colored reflection light emitted from the light source part.

Description

technical field [0001] The present invention relates to a light source control device, an image reading device, an image forming device, and a control method of a light source unit. Background technique [0002] Japanese Published Unexamined Patent Application No. 2002-237922 discloses an image reading device in which, when a color original is output as a monochrome image, three color LEDs for emitting light on an object The amount of current applied or the period of light emission of the three colored LEDs varies in the same ratio. Also, Japanese Laid-Open Unexamined Patent Application No. 2002-111974 discloses an automatic double-sided document reading device in which a first reader and a second reader for reading both sides of a document respectively have The light sources have the same or nearly the same spectral characteristics. In addition, Japanese Published Unexamined Patent Application No. 2005-084741 discloses an image recognition device in which, when it cannot ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N1/024H04N1/04H05B37/02
CPCG01J1/32G01J3/513G01J3/51G03G15/0435G01J1/0411G01J1/04G01J1/0488H04N1/484
Inventor 酒井则和志水三男
Owner FUJIFILM BUSINESS INNOVATION CORP
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