CN1527241A - Scanning instrument - Google Patents

Abstract

The scanning instrument has fogged raised dot or fogged area beside the scanning window in its upper casing, and the fogged raised dot or fogged area is used in positioning the start point of the scanning path of optical scanning module during scanning the document in the scanning window.

Description

Scanner

Technical field

The invention relates to a kind of optic scan module locating device, and particularly relevant for a kind of optic scan module locating device that need not use optic scan module positioning correcting sheet (Calibration Sheet).

Background technology

Along with significantly improving of computing power, and the high development of the Internet and multimedia technology, except utilizing digital camera (Digital Camera, DC) outside the direct pick-up image pattern, the image input operation of other relevant document or picture, all need see through the analog image that optical scanner (Optical Scanner) captures literal or pattern, and to the digital signal output of converting, help the user on computing machine or other electronic product, carry out the actions such as demonstration, identification (OCR), editor, storage and output of image file.

Input mode according to document image is distinguished, and optical scanner can be divided into handly scanner, paper feeding scanner (Sheet Feed Scanner), drum type scanner (Drum Scanner) and falt bed scanner (Flatbed Scanner) or the like.It should be noted that, because platform-type scanner has more stable image scan quality, and has a function of scanning reflection original text or transmission original text (egative film, transparency etc.), more can be equipped with an autofile document feeder (Automatic DocumentFeeder, ADF), in order to scan whole folded measure-alike file, make falt bed scanner become one of present modal optical scanner.

Falt bed scanner is mainly a casing on appearance structure, this casing is made of a lower house (Down housing) and the upper shell (Up Housing) that is positioned on the lower house usually.Wherein, upper shell has the one scan window, and the file of desire scanning can place the enterprising line scanning of this scanning window.As for the inner structure of falt bed scanner in casing, then include scanning devices such as optic scan module (scan head), drive unit (being generally step motor), linear guide and control circuit.

Wherein, drive optic scan module by drive unit, and linear guide is auxiliary, optic scan module can do flyback retrace to the file on the scanning window along linear path.And control circuit board is except as the control between optic scan module and drive unit, and control circuit is also done image processing and output with the induced voltage signal that optic scan module scanning back produces.

In general, known upper shell can have an optic scan module positioning correcting sheet usually near scanning window, as the location of optic scan module scanning pattern starting point when scanning and the correction of color.Wherein, about the localization part of known optical scan module positioning correcting sheet as optic scan module scanning pattern starting point when scanning, can be with reference to figure 1, what Fig. 1 illustrated is the upper shell internal view of known scanner.Near the scanning window 105 of upper shell 100, has optic scan module positioning correcting sheet 110.This optic scan module positioning correcting sheet 110 includes black (in vain) zone 115 and white (deceiving) zone 120.When optic scan module (not illustrating) scans, optic scan module is promptly by during being swept to white (deceiving) zone 120 from black (in vain) zone 115, black (in vain) zone 115 can be variant with the induced voltage that white (deceiving) zone 120 is produced, the location of scanning pattern starting point when therefore, optic scan module promptly scans as it by the difference between this induced voltage.

As from the foregoing, known optic scan module positioning correcting sheet is a kind of black, white clearly demarcated thin slice that is printed as.Therefore, optic scan module can be by the in white and black interval of this thin slice of scanning, as the positioning correcting of its scanning pattern starting point.But, this optic scan module positioning correcting sheet has following shortcoming:

1. the use of optic scan module positioning correcting sheet must expend cost (comprise and assembling man-hour).

2. the black and white interval of optic scan module positioning correcting sheet must be very accurate on the position,

Therefore when making, spent cost must be not low.

Summary of the invention

In view of this, the present invention proposes a kind of scanner that need not use optic scan module positioning correcting sheet, can save assembling man-hour and Material Cost.

The present invention proposes a kind of scanner, and this scanner has optic scan module, drive unit, guidance device and the control circuit in casing and the casing.Wherein, casing includes lower house and upper shell, and wherein, upper shell is positioned on the lower house, and has scanning window and at least one salient point, and salient point is positioned at the other appropriate location of scanning window, and bump surface is a cloudy surface.Optic scan module is in order to making image scan to the file on the scanning window, and wherein, with the scanning pattern starting point of this cloudy surface location optic scan module.Drive unit then moves in order to drive optic scan module.Guidance device is then in order to guide optic scan module along the one scan path movement.As for control circuit, then in order to control optic scan module and drive unit.

In preferred embodiment of the present invention, salient point for example is a square thing.

The present invention proposes a kind of scanner in addition, and is similar with the scanner of the invention described above, mainly directly replaces above-mentioned salient point with cloudy surface with cloudy surface.

In sum, the present invention proposes a kind of scanner, and the scanning window on the housing is other thereon has the salient point of cloudy surface or have cloudy surface, utilizes the cloudy surface can be with the light scattering characteristics, to play the usefulness of point location as its optic scan module scanning pattern.And because salient point or cloudy surface with cloudy surface all can be directly molded on the upper shell, therefore can omit Material Cost and assembling man-hour that optic scan module decide correcting sheet, and the saving cost.

For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, elaborate.

Description of drawings

What Fig. 1 illustrated is the schematic top plan view of known optical scan module positioning correcting sheet; And

What Fig. 2 illustrated is the schematic top plan view of the optic scan module of preferred embodiment according to the present invention.

Label declaration

100,200: loam cake 110: correcting sheet

210,220: square thing 230: scanning window

240: cloudy surface A: starting point

B, C: direction

Embodiment

The present invention proposes a kind of scanner, and this scanner has casing (can be divided into upper shell and lower house), and has optic scan module, drive unit, guidance device and control circuit in the casing.Wherein, for the Material Cost of saving optic scan module locating device in the scanner and assembling man-hour, the present invention considers to dispose the substitute that can make light scatter on upper shell, for example is a salient point or the cloudy surface that the surface has cloudy surface, substitutes known optic scan module positioning correcting sheet.

Please refer to Fig. 2, what Fig. 2 illustrated is the upper shell internal view of the scanner of the preferred embodiment according to the present invention.In Fig. 2, have scanning window 230 on the upper shell 100, and other at scanning window 230, on the appropriate location of corresponding optic scan module (not illustrating) scanning pattern starting point, have salient point 210 and salient point 220.And the surface of salient point 210 and salient point 220 is a cloudy surface.With salient point 210 is example, has the cloudy surface 240 that for example sandblast or texture are handled on the bump surface.

And i.e. salient point 210 and the salient point 220 by having cloudy surface 240 of optic scan module located the starting point of its scanning pattern.Its reason is that when irradiate light arrived cloudy surface 240, cloudy surface 240 can be with the even scattering of light, therefore, identical light is compared with the reflection of process general closed planar through cloudy surface 240 reflections, on identical acceptance point, cloudy surface 240 catoptrical light intensities many a little less than than the catoptrical light intensity of general closed planar.Therefore, when optic scan module scanned salient point 210, salient point 220 by other position, optic scan module was also inequality with the light intensity at the light that other position received in the light intensity of the light that salient point 210, salient point 220 are received.In other words, when optic scan module is scanned up to salient point 210 and salient point 220, the light intensity of the light that optic scan module is accepted a little less than, and produce more weak induced voltage.

Be familiar with this operator as can be known, when optic scan module scans file, can begin to move at every turn, and scan, arrive at terminal point (not illustrating) at last, directly retract starting point A by terminal point towards the C direction again along B direction (not illustrating) from starting point A.Wherein, when just beginning, the optic scan module position might not just rest on the starting point A, so optic scan module must make positioning correcting to starting point A, and is errorless with the starting point A that guarantees each scanning.

Therefore, when optic scan module near starting point A, and when starting point A made positioning correcting, can produce the characteristic of more weak induced voltage in the time of can utilizing optic scan module to scan salient point 210 and salient point 220, locate starting point A.

In addition, it should be noted that the salient point or the number of cloudy surface, be not limited to two, can also realize the present invention for one.

Comprehensively above-mentioned, the present invention proposes a kind of scanner, and be the salient point of cloudy surface with the surface or directly be that cloudy surface is disposed on the upper shell of scanner, and corresponding to the scanning pattern starting point of optic scan module in the scanner.By this salient point or cloudy surface is subjected to the light time, can be with the characteristic of light scattering, to play the usefulness of point location as the optic scan module scanning pattern.And when with salient point or cloudy surface direct forming during, can have the advantage of saving Material Cost and assembling man-hour in the upper shell of scanner.

Though the present invention with preferred embodiment openly as above; right its is not in order to limiting the present invention, anyly is familiar with this operator, without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention is as the criterion when looking claims person of defining.

Claims (5)

1. scanner is characterized in that: comprising:

One casing comprises:

One lower house;

One upper shell is positioned on the lower house, and this upper shell has one scan window and at least one salient point, and wherein, this salient point is positioned at the other appropriate location of this scanning window, and this bump surface is a cloudy surface;

One optic scan module is positioned at this casing, and this optic scan module wherein, is located the one scan path starting point of this optic scan module in order to the file on this scanning window is made an image scan with this cloudy surface;

One drive unit is positioned at this casing, moves in order to drive this optic scan module;

One guidance device is positioned at this casing, in order to guide this optic scan module along the one scan path movement; And

One control circuit is positioned at this casing, in order to control this optic scan module and this drive unit.

2. scanner as claimed in claim 1 is characterized in that: this salient point is a square thing.

3. scanner as claimed in claim 1 is characterized in that: this upper shell has two salient points.

4. scanner is characterized in that: comprising:

One casing comprises:

One lower house;

One upper shell is positioned on the lower house, and this upper shell has one scan window and at least one cloudy surface, and wherein, this cloudy surface is positioned at the other appropriate location of this scanning window;

One optic scan module is positioned at this casing, and this optic scan module is in order to make an image scan to the file on this scanning window, and wherein, this optic scan module is with the starting point of this cloudy surface as this image scan of location;

One drive unit is positioned at this casing, moves on this rack rails in order to drive this optic scan module;

One guidance device is positioned at this casing, moves along this rack rails in order to guide this optic scan module; And

One control circuit is positioned at this casing, carries out this image scan in order to control this optic scan module.

5. scanner as claimed in claim 4 is characterized in that: this upper shell has two cloudy surfaces.

Images