Color image forming device and its toner color code detection method
A detection method and toner technology, which are applied in the direction of electric recording process applying charge pattern, equipment for applying electric recording process of charge pattern, electric recording technique, etc. Diode consistency, etc.
Inactive Publication Date: 2007-10-24
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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[0005] However, such a sensing unit must use multiple photodiodes to complete the toning of cyan (Cyan, C), magenta (Magenta, M), yellow (Yellow, Y), and black (Black, K) in a color image forming device. Agent color mark detection, the structure is cumbersome and the circuit design is complicated, so it is difficult to control the consistency of the detection accuracy of each photodiode
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[0024] The embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0025] Referring to FIG. 2 , a color image forming device 1 provided by the first example of the present invention includes an intermediate transfer body 112 , an image forming unit 10 and a sensor unit 20 .
[0026] In this embodiment, the color image forming device 1 is a color laser printing device, and the image forming unit 10 mainly includes: a plurality of photosensitive drums 105Y, 105M, 105C, 105K arranged in parallel according to the number of developing colors, and a plurality of charge injection devices 107Y , 107M, 107C, 107K, multiple laser devices 110Y, 110M, 110C, 110K, multiple developing devices 108Y, 108M, 108C, 108K, multiple toner cartridges 111Y, 111M, 111C, 111K.
[0027] The photosensitive drums 105Y, 105M, 105C, and 105K are formed by coating the outer periphery of an aluminum cylinder with an organic photoconductiv...
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The invention relates to a colorful image forming device, comprising a middle transfer element, an image former for forming toner color code on the middle transfer element, and a sensor unit for checking the density and color of the toner color code on the middle transfer element. The sensor unit comprises at least two lighting elements for lighting the toner color code, an image sensor for receiving the reflective light from the color code and outputting an electric signal based on the reflective light, and a digit signal processor for receiving the electric signal and outputting an feedback signal based on the electric signal to the image former. The inventive image forming device uses single image sensor unit to check the toner color code, with simple structure and consistent check accuracy. And the invention provides a check method of colorful color code.
Description
【Technical field】 [0001] The invention relates to a color image forming device and a method for detecting the concentration and color of the toner color mark of the color image forming device. 【Background technique】 [0002] In electrophotographic image forming devices, such as color laser printing devices and copying devices, when changes in the environment or long-term use cause changes in various parts of the device, the density of the obtained image will change. In particular, in the case of a color image forming apparatus, a slight variation in density may destroy the color balance. Therefore, it is necessary to always maintain a constant density and color characteristics. [0003] Therefore, in an electrophotographic color image forming apparatus, a sensor for detecting the density of the toner to form a toner patch (Toner Patch) on a transfer material is provided for each color toner (Toner). The Toner Patch Sensor measures the concentration and color of the toner co...
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IPC IPC(8): G03G15/16G03G15/08G03G15/00
Inventor 张仁淙
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD