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Image scanning method for scanner

An image scanning and scanner technology, applied in the field of scanning, can solve problems such as low scanning efficiency, unbreakable scanning speed, and inability of driving signal frequency to exceed excitation signal frequency, etc.

Inactive Publication Date: 2003-10-08
YUDONG PLASMA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] 1. If a photosensitive element such as a CCD module can only store one of the three primary color digital signals every time it is excited, not only the scanning efficiency is low, but also the scanning speed cannot be broken through.
[0016] 2. Because the motor drives the clock signal based on the excitation signal, the frequency of the driving signal cannot exceed the frequency of the excitation signal, so that the scanning speed cannot be broken through

Method used

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  • Image scanning method for scanner
  • Image scanning method for scanner
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Embodiment Construction

[0033] As shown in Figure 1A, the CCD module can simultaneously pick up three primary color image signals from an exposure signal. When the three primary color digital signals (red light digital signal, green light digital signal and blue light digital signal) are respectively fed into the multiplexer 140 through the signal lines 108, 118 and 128, the multiplexer 140 can feed the three primary color digital signals into the storage device together. 150, or only select one of the primary color digital signals to store. When storing the digital signals of the three primary colors at the same time, the frequency of the timing signal used by the multiplexer 140 in the present invention is three times the frequency of the digital signals of the three primary colors. Therefore, the multiplexer 140 can be switched in the cycle time when the digital signal changes once. 3 times, to sequentially pick up 3 sets of digital signals and feed them into the storage device 150 for storage. O...

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Abstract

An image scanning method for scanner features that a drive signal of motor, a trigger signal and the number of steps run by motor are determined based on a preset resolution. The period TG of drive signal, the period TM of trigger signal and the number N of steps have the relation:TG=TM*N. The trigger signal can send out image signals. In the period of trigger, the image signals are stored. The period of trigger signal and number of steps are determined by looking up table based on preset resolution. The steps for storing image signals include conventing image signals to digital signals and storing the digital signals during the period of trigger signal.

Description

technical field [0001] The present invention relates to an image scanning method of a scanner, in particular to a setting value based on resolution, which can determine the driving signal cycle and the number of running steps of the motor, and calculate the excitation signal cycle of the light sensing element time to increase the scan rate of the scan method. Background technique [0002] When designing scanners in the early stage, due to the limitation of the excitation signal cycle time of the light sensing element by the exposure time and the time spent storing each pixel, there is a minimum limit for the excitation signal cycle time of the light sensing element, so the conventional method , all take the excitation signal of the light sensing element as the most basic clock signal, that is, the driving signal of the motor is an integral multiple of the excitation signal of the light sensing element. This approach limits the scanning rate, and an example is given below il...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N1/191
Inventor 叶宝元吴侑庭
Owner YUDONG PLASMA TECH