CN100418343C - Paper-fed scanning device using paper-feeding power source for calibration - Google Patents

Abstract

The present invention relates to a paper feeding type scanning device corrected by using a power supply of feeding paper, which comprises a scanning module, a paper feeding module, a driving module, a moving module of correcting sheets, and correcting sheets, wherein the scanning module is used for scanning documents in a scanning zone; the paper feeding module is used for feeding the documents through the scanning zone; the driving module is used for driving the paper feeding module and the moving module of correcting sheets; the correcting sheets are driven by the moving module of correcting sheets and are positioned in the scanning zone before the documents are fed; when the documents start to be fed, the documents gradually move away from the scanning zone to make a plurality of scanning lines on the scanning correcting sheets of the scanning module used for correction, before the documents are fed to the scanning zone, the documents are completely moved away from the scanning zone to make the scanning module subsequently scan the documents, and after the driving module reversely rotates, the correcting sheets can move back to the scanning zone.

Description

Paper-fed scanning device using paper-feeding power source for calibration

technical field

The invention relates to a paper-feeding type scanning device, in particular to a paper-feeding type scanning device using a paper-feeding power source for correction.

Background technique

When the earliest paper-fed scanners were used for color or brightness calibration, the calibration paper was fed into the scanner before scanning for scanning as the basis for standard color or brightness calibration. However, the calibration paper is easy to lose and the calibration method is very inhumane.

In another manner, the scanning module of the scanner only scans a single scanning line of the calibration paper inside the scanner as the basis for calibration of the standard color or brightness. However, when the scan line is defaced, the calibration basis for standard color or brightness will not be accurate.

In another method, a motor and a gear set different from the paper-feeding module are used to cooperate with a detector for detecting the position of the calibration paper to scan a plurality of scanning lines on the calibration paper as a basis for standard color or brightness calibration. When calibration is required, the motor rotates forward to bring the calibration sheet into the scanning window. Then, after scanning a plurality of scanning lines, the detector is used to detect the position of the calibration sheet, and the motor is controlled to reverse, so as to move the calibration sheet away from the range of the scanning window and return to the original position.

In this calibration method, a set of dedicated motors, gear sets, detectors and related control circuits are required, which has the disadvantages of a large number of parts and high cost.

Contents of the invention

Therefore, an object of the present invention is to provide a paper-fed scanning device using a paper-feeding power source for calibration, so as to reduce the number of motors and control circuits and save costs.

To achieve the above purpose, the present invention provides a paper-fed scanning device using a paper-feeding power source for calibration, which includes a scanning module, a paper-feeding module, a driving module, a calibration sheet moving module, and a calibration sheet. The scanning module is used for scanning documents in the scanning area, and the paper feeding module is used for feeding documents through the scanning area. The driving module is used to drive the paper feeding module and the calibration sheet moving module. The calibration sheet is driven by the calibration sheet movement module and can be positioned in the scanning area before the document is fed, gradually moved away from the scanning area when the document is being fed, so that the scanning module scans a plurality of scan lines on the calibration sheet for calibration, and Move completely away from the scanning area before the document is fed into the scanning area to allow the scanning module to scan the document subsequently. The calibration sheet cannot be moved back into the scan area until the drive module is reversed.

By means of the paper-fed scanning device of the present invention, the effects of cost saving, shortened calibration scan time and dust prevention can be achieved.

Description of drawings

FIG. 1 shows a schematic diagram of a first state of a sheet-fed scanning device according to a preferred embodiment of the present invention.

FIG. 2 is a schematic diagram showing a second state of the paper-fed scanning device according to a preferred embodiment of the present invention.

FIG. 3 is a schematic diagram showing a third state of the paper-fed scanning device according to a preferred embodiment of the present invention.

FIG. 4 shows the driving module and the calibration sheet moving module of FIG. 1 .

Detailed ways

1 to 3 are diagrams showing the first to third states of the sheet-fed scanning device according to a preferred embodiment of the present invention. As shown in FIGS. 1 to 3 , the paper-fed scanning device using a paper-feeding power source for calibration of the present invention includes a scanning module 10 , a paper-feeding module 20 , a driving module 30 , a calibration sheet moving module 40 and a calibration sheet 50 . The scanning module 10 is fixedly located in the scanning device for scanning the document P in the scanning area 12 . The scanning module 10 may comprise a charge coupled device (CCD) sensor or a contact image sensor (CIS). The paper feeding module 20 is used to feed the document P through the scanning area 12 . Generally, the paper feeding module 20 includes a paper feeding roller 21 , a paper separation sheet 22 , and a plurality of rollers 23 to 25 . The driving module 30 generally includes a motor and a gear set for driving the paper feeding module 20 . In this embodiment, the calibration sheet moving module 40 is driven by the driving module 30 . Therefore, the driving module 30 simultaneously drives the paper feeding module 20 and the calibration sheet moving module 40 .

The calibration sheet 50 is driven by the calibration sheet moving module 40 . Before the document P is fed, the calibration sheet 50 is located in the scanning area 12 , above the glass plate 61 , that is, the initial position of the calibration sheet 50 is located in the scanning area 12 , as shown in FIG. 1 . When the document P is being fed, the calibration sheet 50 gradually moves away from the scanning area 12 so that the scanning module 10 scans a plurality of scanning lines L1 , L2 , L3 on the calibration sheet 50 for calibration, as shown in FIG. 2 . Before the document P is fed into the scanning zone 12 , the calibration sheet 50 is completely moved away from the scanning zone 12 and positioned above the guide plate 62 so that the scanning module 10 can scan the document P subsequently, as shown in FIG. 3 .

Usually, when the scanning module 10 scans a stack of documents, it only needs to calibrate the standard color and brightness once. Therefore, when the scanning module 10 is scanning subsequent documents, the correction sheet 50 continues to be located at the position shown in FIG. state.

In order to enable the calibration sheet 50 to have the above-mentioned movement, the calibration sheet moving module 40 must have a special design. For example, it can be achieved by using a friction wheel or a ratchet to cooperate with related mechanisms, and it can also be achieved by using an electromagnetic clutch, as described below.

FIG. 4 shows an example of the driving module and the calibration sheet moving module of FIG. 1 . As shown in FIG. 4 , the calibration sheet moving module 40 includes a gear 41 driven by the gear 31 of the driving module 30 . The gear 41 drives the roller 43 coaxial with the roller 43 through the release/engagement mechanism (such as an electromagnetic clutch) 42 , and the correction sheet 50 is wound around the periphery of the roller 43 . By controlling the release/engagement mechanism 42 to release/engage the gear 41 and the roller 43, it can be used to make the correction sheet moving module 40 no longer move the correction sheet 50 after the correction sheet 50 is completely moved away from the scanning area 12, and After the driving module 30 is reversed, the calibration sheet moving module 40 is made to reversely move the calibration sheet 50 .

In the known technology, when the scanning device is in standby, the calibration sheet is located outside the scanning area; during calibration scanning, the calibration sheet is located in the scanning area; when scanning documents, the calibration sheet is located outside the scanning area. In the scanning device of the present invention, the calibration sheet is located in the scanning area during standby and calibration scanning, and the calibration sheet is located outside the scanning area when scanning documents. Compared with known technology, the present invention has the following advantages:

1. The present invention utilizes the power of the drive module as the power source for the movement of the correction sheet, which can save a set of motors, detectors and related control circuits.

2. The present invention uses the time before the paper arrives at the scanning area to carry out the action of correcting scanning, so the time required for correcting scanning can be saved.

3. The correction sheet of the present invention is located in the scanning area during standby, so that dust can be prevented from entering the scanning module or sticking to the optical path of the scanning module, so as to achieve a dust-proof effect.

The specific embodiments proposed in the detailed description of the preferred embodiments are only used to facilitate the description of the technical content of the present invention, rather than restricting the present invention to the above-mentioned embodiments in a narrow sense, without departing from the spirit of the present invention and the claims Situation, the implementation of various changes done, all belong to the scope of the present invention.

Description of reference symbols

L1, L2, L3~ scan line

P~file

10~Scan module

12~ Scanning area

20~feeder module

21~feed roller

22~ split paper

23, 24, 25~Roller

30~drive module

31~ gear

40~calibration sheet mobile module

41~ gear

42~Loosening/engagement mechanism

43~Roller

50~calibration sheet

61~ glass sheet

62~ guide plate

Claims (4)

1. paper feedback scanning device that utilizes the paper feed power source do to proofread and correct comprises:

Scan module is in order at the scanning area scanning document;

The paper feed module is in order to present described file by described scanning area;

Driver module is in order to drive described paper feed module;

The correcting sheet mobile module is driven by described driver module; And

Correcting sheet, it is driven by described correcting sheet mobile module, and can be fed anteposition in described scanning area at described file, when just beginning to be fed, described file moves apart described scanning area gradually so that the multi-strip scanning line that described scan module scans on the described correcting sheet is used for proofreading and correct, and be fed at described file that described scanning area moved apart described scanning area in the past fully so that described scan module can scan described file subsequently, after described driver module counter-rotating, described correcting sheet just can be moved back into described scanning area.

2. the paper feedback scanning device that utilizes the paper feed power source to do and proofread and correct as claimed in claim 1 is characterized in that described correcting sheet mobile module comprises:

Get loose/snap fastener, no longer move described correcting sheet in order to make described correcting sheet mobile module after moving apart described scanning area fully at described correcting sheet, and after described driver module counter-rotating, make described correcting sheet mobile module oppositely move described correcting sheet.

3. the paper feedback scanning device that utilizes the paper feed power source to do and proofread and correct as claimed in claim 2 is characterized in that described getting loose/snap fastener is an electromagnetic clutch.

4. the paper feedback scanning device that utilizes the paper feed power source to do and proofread and correct as claimed in claim 1 is characterized in that described driver module is a motor.

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