CN1270266C - Scanner with common illuminating light source - Google Patents
Scanner with common illuminating light source Download PDFInfo
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- CN1270266C CN1270266C CN 02158490 CN02158490A CN1270266C CN 1270266 C CN1270266 C CN 1270266C CN 02158490 CN02158490 CN 02158490 CN 02158490 A CN02158490 A CN 02158490A CN 1270266 C CN1270266 C CN 1270266C
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- original text
- light source
- radiation source
- emitting diode
- transmission original
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Abstract
The present invention relates to a common illuminating light source which replaces a traditional back-light source as an irradiating light source for scanning a transmission manuscript in a scanner. The method comprises: according to the characteristics of a scanning file (a reflective manuscript or a transmission manuscript), the software is used for controlling the ON or the OFF of an array of a linear light emitting diode to execute the scanning step. In addition, a back-light device uses a light collecting device to collect a light source sent out by the array of the linear light emitting diode. The light source is reflected by a module of a reflecting mirror in the back-light device and is reflected to an image sensing device through the transmission manuscript. Therefore, the common irradiating light source used as the light source of the scanner can save the cost of a lamp tube holder increased in the light shielding process and obtain better image output quality.
Description
Technical field
The present invention relates to a kind of common radiation source device of scanner, more particularly a kind of common radiation source of software control that utilizes is in order to irradiation reflection original text or transmission original text.
Background technology
Scanister is well known and produces mechanical-readable and get the image data signal as falt bed scanner, the image data signal that this is produced after scanning for object, and sweep object can be photograph or printing word.In the application of scanister, can produce the image data of sweep object by scanner and personal computer, and with this image data output on display device, cathode-ray tube (CRT) (CRT for example; Cathode ray tube) or printer (printer).
General typical falt bed scanner comprises irradiation unit and optical system to finish the step of object scan.Wherein, irradiation system is in order to irradiation object (normally so-called " scanning area " (scan region)) partly, optical system then is to collect by irradiation area and will shine to scan the surface that pocket (being commonly referred to sweep trace (scan line)) partly focuses on the sensing optical activity detector, and wherein the sensing optical activity detector is positioned at scanner.Image data is represented sweep object and can be by prolonging sweep trace and obtaining through whole object, usually can be by obtaining between mobile irradiation unit and the object relevant with optical system.
In addition, irradiation system comprises light source (light source) (for example, fluorescent lamp (fluorescent), white heat fluorescent tube (incandescent lamp) or light emitting diode matrix (LED arrays; Lightemitting diode arrays).Optical system then be comprise lens (lens) and reflecting optics (mirror) assembly be used for will the irradiation sweep trace image focus on the surface of detector.On the other hand, contact image sensor (CIS; Contact image sensor) can be used to assemble and focus on by the light of irradiation scanning area to the detector top.
And another kind of by optical system in order to detecting image light and to focus on the optical system can be charge-coupled device (CCD) (CCD; Charge-coupled device).General charge-coupled device (CCD) comprises the array (array of the individual cells) or the so-called pixel (pixels) of independent structure cell, and each structure cell or pixel are assembled or increasing the electric charge that is exposed to light source replys.Because stored charge is relevant with the intensity and the time shutter of exposure in any known structure cell or pixel, and a charge-coupled device (CCD) can be detected detecting clear zone and stain on the image that focuses on.
When plat form type scanning apparatus is well known scanner, begin to tend to have big finger mark " footprint ", therefore can occupy more space, no matter be to be placed on which kind of place (on desk or desk).In addition, since most of falt bed scanners need connecting line or cable connect other extra device, the therefore most user motion scan device that tends to try not.
Fig. 1 is the process flow diagram that causes Dual Images when being illustrated in scanning reflection in the tradition/transmission original text.In traditional scanner, utilize white heat fluorescent tube (fluorescent lamp) for irradiation scanning light source (step 101),, be placed on the scanning platform, scan (step 102) then with scanning document such as transmission original text.When scanning light source irradiation and scanning transmission original text, light penetrated the transmission original text from lower to upper and arrived back lighting device (backlight device), then light can reflex to Image sensor apparatus (image sensor device) (step 103) by the magnifier module (reflected mirror module) of back lighting device, to produce image (step 104) and to export the image data (step 105) of transmission original text.Through the transmission original text, but when reflexing to image sensing module (from top to bottom) can cause at Dual Images (double image) light again, makes that when image output, its output quality is not good from lower to upper the time.
The problem of the Dual Images that is caused when solving the scanning transmission original text, in Fig. 2, propose to be positioned at sliding casket fluorescent tube in the middle of partly utilize the mode of shading treatment, solve the problem of Dual Images.As mentioned above, when expression utilizes fluorescent tube as radiation source, and part is through shading treatment (step 202) in the middle of fluorescent tube, and when the scanning transmission original text, its radiation source can be recorded (part of promptly not passing through shading treatment) by two of fluorescent tube.When light passes transmission original text (step 203) from lower to upper and is sent to back lighting device, and then reflex to Image sensor apparatus (step 204) via the magnifier module in the back lighting device, (step 205) can't cause the problem of Dual Images when the image output data.But, the essential design cost that increases tube stand of shading treatment; In addition,, make the light source of irradiation reflection original text only can provide,, then can cause the quality of image output to reduce if radiation source brightness (or briliancy) is not enough by the fluorescent tube both sides owing to partly done shading treatment in the middle of the fluorescent tube.Therefore, even utilize shading treatment can reduce the generation of Dual Images, but for the quality of image output can not be relative lifting.
In addition, in Fig. 3, expression has the synoptic diagram of the scanister 300 of chopping mechanism.To place the sliding casket (not expression in the drawings) in the scanner as the fluorescent tube 302 of radiation source, and part 304 is carried out shading treatment in the middle of fluorescent tube 302.This purpose is for fear of when the scanning transmission original text 306, sees through the light 316 that transmission original text 306 is sent to Image sensor apparatus by 314 reflection rays 316 of magnifier module among back lighting device (the backlight device) 312 and causes Dual Images.The light source of scanning transmission original text 306 is then provided by lamp tube ends 302A, 302B.
Summary of the invention
Fundamental purpose of the present invention is to utilize software according to judging that scanning document is the transmission original text or reflects original text, controls as the linear light emitting diode matrix of radiation source and opens or close.
A further object of the present invention is to utilize linear light emitting diode matrix to have independent emitting characteristics, and utilizes the mechanism design expense of the mode of software control radiation source with tube stand in the minimizing scanner.
An of the present invention purpose is that a beam condensing unit is installed in back lighting device, in order to assemble the light source of being launched by linear light emitting diode matrix, as the irradiation light source of scanning transmission original text.
For reaching above-mentioned purpose, the invention provides a kind of method of utilizing the software control radiation source, this method comprises: judge whether the one scan file is a transmission original text, and judged result then enters next step if yes; If not, then open radiation source, described radiation source is a linear light emitting diode matrix; Close the described radiation source that is positioned at pars intermedia part; Shine this scanning document; An and image data of this scanning document of output.
For reaching above-mentioned purpose, the present invention also provides a kind of scanister with common radiation source, this scanister comprises: an irradiation unit, this irradiation unit is a linear light emitting diode matrix, in order to shine a transmission original text, the switch in the lamp source in the described linear light emitting diode matrix is by a software control; One back lighting device is used to assemble the light through the emission of transmission original text, and with the light reflected illumination to the transmission original text; And an Image sensor apparatus, this Image sensor apparatus is in order to induction and receive the light source that this back lighting device emission sees through this transmission original text, and wherein, the light source of this irradiation unit middle body is closed.
According to above-described purpose, the radiation source when the invention provides a kind of common radiation source and utilizing back light as the scanning transmission original text to replace tradition.Method of the present invention is according to the characteristic of scanning document (reflection original text or transmission original text), utilizes the unlatching of the linear light emitting diode matrix of software control or closes to reach the effect of scanning.In addition, part at back lighting device is utilized beam condensing unit, the light source of light emitting diode is assembled, and by the magnifier module in the back lighting device with source reflection to the transmission original text, the transmission original text is carried out scanning step, with the tube stand cost of saving required increase in shading treatment and obtain preferable image output quality.
Description of drawings
Fig. 1 produces each step synoptic diagram of Dual Images for using conventional scanner scanning transmission original text;
Fig. 2 is according to traditional technology, does the process flow diagram of shading treatment in the middle of the fluorescent tube of scanner;
Fig. 3 is according to traditional technology, carries out the synoptic diagram of shading treatment white heat fluorescent tube pars intermedia part;
Fig. 4 is disclosed technology according to the present invention, utilizes the linear light emitting diode matrix of software control to open the process flow diagram in scan lamp source to judge scanning document;
Fig. 5 is disclosed technology according to the present invention, the calcspar of the scan module in the expression one scan instrument;
Fig. 6 is disclosed technology according to the present invention, and expression utilizes the structural representation of linear light emitting diode matrix as common scan lamp source.
Symbol description among the figure
10-20 utilizes the process flow diagram of software control scanning radiation source
30 linear light emitting diode matrixs
The linear LED lamp source that 32A-32H opens
The linear LED lamp source that 34A-34F closes
36 transmission original texts
38 back lighting devices
40 beam condensing units
42 reflection rays
50-62 utilizes system's control of the scanister of linear light emitting diode matrix
Calcspar
101-105 uses traditional irradiation light source to produce the process flow diagram of Dual Images
201-205 uses the process flow diagram of shading treatment
300 scanister
302 fluorescent tubes
304 shading treatment
306 transmission original texts
308 back lighting devices
310 magnifier module
312 reflection sources
Embodiment
Some embodiments of the present invention can be described in detail as follows.Yet except describing in detail, the present invention can also be widely implements at other embodiment, and scope of the present invention do not limited, and its scope with claims is as the criterion.
Because tradition utilizes fluorescent tube as irradiation scan lamp source, in the process of scanning transmission original text, can produce the shortcoming of Dual Images.Again in order to save the chopping mechanism device, therefore the invention provides and a kind ofly can save the scanner energy resource consumption, and need not use the method that the chopping mechanism device promptly can avoid producing Dual Images.
With reference to figure 4, for the present invention utilizes linear light emitting diode matrix (linear light emittingdiode array) as scanner irradiation scanning document, and judge that by software whether scanning document control the process flow diagram of the switch of linear light emitting diode matrix for the transmission original text.In Fig. 4, to desire scanning document and be placed on scanning platform top (step 10), then, judge that via software this scanning document is reflection original text or transmission original text, with the light emitting diode number of controlling required unlatching on the linear light emitting diode matrix light source (step 12) as the irradiation scanning document.
When scanning document is the reflection original text, software is all opened (step 16A) with the light source of linear light emitting diode matrix, and the image that scanning reflection original text (step 16B) is produced afterwards is sent to the image data (step 16C) of Image sensor apparatus (image sensor device) and imaging device and output reflection original text then; When scanning document is the transmission original text, then software is closed (step 14A) with the light source of part in the middle of the linear light emitting diode matrix, the light of linear then light emitting diode matrix both sides is sent to beam condensing unit through the transmission original text from lower to upper, can be the leaded light post at this beam condensing unit.Then, light source is assembled (step 14B), and this source reflection to transmission original text is scanned (step 14C) by the magnifier module in the back lighting device by beam condensing unit.Then, light source is from top to bottom reflected be sent to Image sensor apparatus (step 14D).Then, export imaging device again to, and output through scanning after produced transmission original text image data (step 14E).
According to above description, when the scanning transmission original text, utilize the linear light emitting diode matrix of software control to close middle lamp source partly, to reach the purpose of shading treatment.Utilize the advantage of the method do not need to be the irradiation source in the scanner is carried out chopping mechanism processing, therefore the mechanism design expense that can save tube stand; In addition, linear light emitting diode matrix lamp source is from bottom to top assembled, and utilize the magnifier module in the back lighting device that source reflection is resent to Image sensor apparatus through the transmission original text by beam condensing unit.In addition, can also save consumption and the manufacturing cost that the energy also can be saved in the space of scanner.
As shown in Figure 5, expression utilizes the structural representation of linear light emitting diode matrix as the scanner in scanning irradiation light source.When Fig. 5 represents the scanning transmission original text, in the linear light emitting diode matrix 30, the LED lamp source 34A to 34F of part closes via software control in the middle of being positioned at, to reach the effect of shading treatment, lamp source 32A-32D of linear light emitting diode matrix both sides (fluorescent tube left side) and 32E-32H (fluorescent tube right side) then are the patterns of opening.When transmitting illuminant passes transmission original text 36 from lower to upper the time, arrive back lighting device 38 then, beam condensing unit 40 in the back lighting device can be assembled the light source of being launched by linear light emitting diode matrix 30 both sides 32A-32H at this moment, and by magnifier module (not representing in Fig. 5) in the back lighting device 38 light 42 is reflected.When light 42 reflecting ﹠ transmitting transmission original texts 36 are resent to image sensing module when (not representing) in Fig. 5, the problem that the image data that is produced does not have Dual Images takes place.
With reference to figure 6, utilize system's control calcspar of the scanister of linear light emitting diode matrix for the present invention.In this system's control calcspar, one scan module 50 is arranged, in this scan module, comprise a radiation source 52, this radiation source 52 is a linear light emitting diode matrix, utilizing software is reflection original text or transmission original text according to scanning document, and the lamp source of controlling this linear light emitting diode matrix opens or closes to be closed.Then, again the scan image (reflection original text image or transmission original text image) that obtains is sent to image sensing module 54 via magnifier module 58, wherein image sensing module 54 can be charge-coupled device (CCD) (CCD; Charge-coupled device) or contact image sensor (CIS; Contact image sensor), wherein, image sensing module 54 can be controlled by control circuit 60, and control circuit 60 is then by drive unit 62 controls.
We can know that the linear light emitting diode matrix of use comprises as the advantage in the shared scan lamp source of scanning reflection original text and transmission original text according to above description:
The first, utilize the independent characteristics of luminescence of light emitting diode, can utilize the unlatching in software control lamp source or close, and reach so-called shading treatment, and can not produce the problem of Dual Images.
The second,, can save the back light in the back lighting device, and can use the irradiation light source of same lamp source as irradiation reflection original text or transmission original text by leaded light post and light-emitting diode structure.
Three, utilize linear light emitting diode matrix can save the design cost of tube stand as the irradiation light source.
The above is preferred embodiment of the present invention only, is not in order to limit protection scope of the present invention; All other do not break away from the equivalence of being finished under the disclosed spirit and changes or modification, all should be included in the scope of claims.
Claims (3)
1. a method of utilizing the software control radiation source is characterized in that, this method comprises:
Judge whether the one scan file is a transmission original text, and judged result then enters next step if yes; If not, then open radiation source, described radiation source is a linear light emitting diode matrix;
Close the described radiation source that is positioned at pars intermedia part;
Shine this scanning document; And
Export an image data of this scanning document.
2. the method for claim 1 is characterized in that, this sweeps above-mentioned irradiation file and comprise:
Assemble this radiation source from lower to upper;
Reflect this radiation source; And
Receive this this radiation source from top to bottom.
3. the scanister with common radiation source is characterized in that, this scanister comprises:
One irradiation unit, this irradiation unit are a linear light emitting diode matrix, and in order to shine a transmission original text, the switch in the lamp source in the described linear light emitting diode matrix is by a software control;
One back lighting device is used to assemble the light through the emission of transmission original text, and with the light reflected illumination to the transmission original text; And
One Image sensor apparatus, this Image sensor apparatus is in order to induction and receive the light source that this back lighting device emission sees through this transmission original text,
Wherein, the light source of this irradiation unit middle body is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02158490 CN1270266C (en) | 2002-12-25 | 2002-12-25 | Scanner with common illuminating light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02158490 CN1270266C (en) | 2002-12-25 | 2002-12-25 | Scanner with common illuminating light source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1510633A CN1510633A (en) | 2004-07-07 |
| CN1270266C true CN1270266C (en) | 2006-08-16 |
Family
ID=34237007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02158490 Expired - Fee Related CN1270266C (en) | 2002-12-25 | 2002-12-25 | Scanner with common illuminating light source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1270266C (en) |
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2002
- 2002-12-25 CN CN 02158490 patent/CN1270266C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1510633A (en) | 2004-07-07 |
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| ASS | Succession or assignment of patent right |
Owner name: YUDONG TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: LIJIE COMPUTER CO., LTD. Effective date: 20060602 |
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Effective date of registration: 20060602 Address after: Taipei city of Taiwan Province Patentee after: Transpacific IP Pte Ltd. Address before: No. two, No. 1-1, R & D Park, Hsinchu Science Park, Taiwan Patentee before: Lijie Computer Co., Ltd. |
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Owner name: YUXI SCIENCE CO., LTD. Free format text: FORMER OWNER: YUDONG TECHNOLOGY CO., LTD. Effective date: 20090814 |
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Effective date of registration: 20090814 Address after: Delaware Patentee after: Transpacific IP Pte Ltd. Address before: Taipei city of Taiwan Province Patentee before: Transpacific IP Pte Ltd. |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060816 Termination date: 20121225 |