CN2796271Y - Plat form type scanner - Google Patents
Plat form type scanner Download PDFInfo
- Publication number
- CN2796271Y CN2796271Y CN 200520017288 CN200520017288U CN2796271Y CN 2796271 Y CN2796271 Y CN 2796271Y CN 200520017288 CN200520017288 CN 200520017288 CN 200520017288 U CN200520017288 U CN 200520017288U CN 2796271 Y CN2796271 Y CN 2796271Y
- Authority
- CN
- China
- Prior art keywords
- light
- scanned
- bed scanner
- data
- emitting diodes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Facsimile Scanning Arrangements (AREA)
Abstract
The utility model discloses a platform type scanner, which comprises a light transmission platform and a scanning mechanism, wherein the light transmission platform is used for bearing data which needs to be scanned and the scanning mechanism which is arranged under the light transmission platform can be moved upwards along the length direction of the light transmission platform. The scanning mechanism comprises a plurality of light-emitting diodes, a light scattering slice, a lens and a charge-coupled device, wherein the light-emitting diodes are arranged in the shape of a line along the width direction of the light transmission platform; the length of the light scattering slice which is arranged above the light-emitting diodes is approximately equal to the width of the light transmission platform, so light emitted from the light-emitting diodes can be scattered to the data which needs to be scanned, and the light reflected by the scanned document is received by the lens and is imaged on the charge-coupled device.
Description
Technical field
The utility model relates to a kind of falt bed scanner, relates in particular to a kind of falt bed scanner that utilizes light-emitting diode as light source.
Background technology
Falt bed scanner can capture the image of data such as paper, photo, picture rapidly, and the image of data is stored in the storage device of computer, thereby makes things convenient for the data management of individual or enterprise, and therefore, falt bed scanner is subjected to application more and more widely.
In when scanning, on data to be scanned, the light that data will project on it again reflexes to CCD (CCD) to falt bed scanner with the ray cast of light emitted.The light that CCD will shine thereon is converted to the corresponding signal of telecommunication, thereby can obtain the image of data.
Existing falt bed scanner uses cathode fluorescent tube (CCFL) as light source usually, and is luminous for making cathode fluorescent tube, and this existing falt bed scanner need have booster circuit makes it luminous cathode fluorescent tube is applied sufficiently high voltage.Above-mentioned booster circuit is being in the high-tension process with low voltage transition, can produce electromagnetic interference to CCD and other electronic component of falt bed scanner, thereby influence the stability of falt bed scanner work; And, therefore in use also can bring the problem on the safety under high voltage because this falt bed scanner is worked.
For overcoming above-mentioned defective, April 23 2003 Christian era, the Chinese patent of bulletin disclosed another kind of existing falt bed scanner No. 02240924.6, this falt bed scanner uses light-emitting diode (LED) as light source, and this falt bed scanner also has one and is half-terete photocon, and light-emitting diode places the side end face of photocon.The part of light-emitting diode emission light is penetrated by the top of photocon after photocon reflection/refraction, and convergence forms the light line that be wire parallel with the photocon bearing of trend on data to be scanned.
Because the light-emitting diode of above-mentioned falt bed scanner places the side end face of photocon, therefore, with the difference from the light-emitting diode distance, the light distribution on the light line is also inequality; And because described light line is not into desirable wire, it has certain width, and light-emitting diode emission light intensity distribution inequality, and therefore, light distribution is more inhomogeneous on the width of converging light lines.So light and shade inequality even speckle can appear in the scan-image of above-mentioned falt bed scanner, thereby influence the quality of scan-image.
Summary of the invention
The purpose of this utility model is to provide a kind of falt bed scanner at the defective that above-mentioned prior art exists, and this falt bed scanner can improve the uniformity that projects data glazed thread to be scanned light distribution, thereby improves the quality of scan-image.
For achieving the above object, the utility model provides a kind of falt bed scanner, comprises a printing opacity platform and one scan mechanism.The printing opacity platform is used to carry data to be scanned.Sweep mechanism places the below of printing opacity platform and can move on printing opacity land lengths direction, and this sweep mechanism comprises a plurality of light-emitting diodes, scattering sheet, camera lens and CCD.A plurality of light-emitting diodes are along the printing opacity berm width direction shape that is arranged in a straight line.Scattering sheet places a plurality of light-emitting diodes top, and the width of the length of scattering sheet and printing opacity platform about equally, so that the light emitted line of light-emitting diode is scattered on the data to be scanned.Camera lens receives the light of data reflection to be scanned and it is imaged on the CCD.
Since the utility model falt bed scanner by the shape that is arranged in a straight line along printing opacity berm width direction a plurality of light-emitting diodes and the light of light-emitting diode emission spread apart after project scattering sheet on the data to be scanned and balance projects the light distribution of light in the scanning area of data to be scanned, thereby light and shade inequality and the speckle that can avoid existing falt bed scanner scan-image to occur, therefore, improved the quality of scan-image.
Description of drawings
Fig. 1 is the schematic diagram of the utility model falt bed scanner.
Fig. 2 is the three-dimensional combination figure of the sweep mechanism of the utility model falt bed scanner.
Fig. 3 is the part three-dimensional exploded view of sweep mechanism shown in Figure 2.
Fig. 4 is the block diagram of the utility model falt bed scanner.
Fig. 5 is the stereogram of another structure of scattering sheet of the utility model falt bed scanner.
Embodiment
See also Fig. 1, the utility model falt bed scanner 10 comprises that a printing opacity platform 100 and places the sweep mechanism 200 of printing opacity platform below.
Please together consult Fig. 2 and Fig. 3, housing 260 tops of sweep mechanism 200 offer one with the roughly wide perforate 261 of printing opacity platform 100.Adjacent openings 261 places, housing 260 upper surfaces form one parallel with perforate 261 and with the width groove 262 about equally of perforate 261.A plurality of light-emitting diodes 210 place groove 262, and are evenly arranged into linearity along printing opacity platform 100 Widths.The cross section of light-passing plastic thin slice 220 is roughly L-shaped, and its width equates with groove 262 width.This light-passing plastic thin slice 220 place a plurality of light-emitting diodes 210 directly over and be covered on the groove 262, thereby a plurality of light-emitting diodes 210 are closed in the groove 262.
When scanning, the ray cast of a plurality of light-emitting diode 210 emissions is to light-passing plastic thin slice 220.Light-passing plastic thin slice 220 upwards projects the light of light-emitting diode 210 emission on the data to be scanned after spreading apart on the length of printing opacity platform 100 and the Width.Therefore, light-passing plastic thin slice 220 makes the light distribution of light in the scanning area that projects data to be scanned even, thereby it is inhomogeneous to avoid projecting the light distribution that is caused on the data to be scanned again after the convergence of rays with the light-emitting diode emission in the prior art.The light that data to be scanned will project scanning area reflexes on the speculum 230, speculum 230 reflexes to camera lens 240 with described light again, to CCD 250, last CCD 250 is converted to the corresponding signal of telecommunication with described light to camera lens 240 with described ray cast.
For obtaining the complete image of data to be scanned, the utility model falt bed scanner 10 also comprises driving mechanism 300 and control circuit 400, as shown in Figure 4.400 pairs of a plurality of light-emitting diodes 210 of control circuit apply low-voltage DC so that it is luminous.Control circuit 400 controlling and driving mechanisms 300 so that driving mechanism 300 driven sweep mechanisms 200 move along the length direction of printing opacity platform 100, shown in arrow among Fig. 1, thereby obtain the complete image of data to be scanned.Control circuit 400 is also controlled the image of CCD 250 acquisitions data to be scanned, and the data image of CCD 250 acquisitions is imported in the storage device 21 of outer computer 20.
The light-passing plastic thin slice 220 of the utility model falt bed scanner 10 plays the function of diffused light, therefore the available scattering sheet that other has the diffused light function replaces light-passing plastic thin slice 220 and the light of scattering light-emitting diode 210 emissions, as replacing light-passing plastic thin slice 220 with strip negative lens 220 ', the cross section of this strip negative lens 220 ' is the concavees lens shape, as shown in Figure 5.
From the above mentioned, the utility model falt bed scanner 10 by the shape that is arranged in a straight line along printing opacity platform 100 Widths a plurality of light-emitting diodes 210 and the light of light-emitting diode 210 emissions spread apart after project scattering sheet such as light-passing plastic thin slice 220 on the data to be scanned or strip negative lens 220 ', and balance projects the light distribution of the interior light of scanning area of data to be scanned, thereby light and shade inequality and the speckle that can avoid existing falt bed scanner scan-image to occur, therefore, improved the quality of scan-image.
Claims (5)
1. falt bed scanner comprises:
One printing opacity platform is used to carry data to be scanned; And
One scan mechanism, place the below of printing opacity platform also can on printing opacity land lengths direction, move, this sweep mechanism comprises a plurality of light-emitting diodes, camera lens and CCD, camera lens receive the light of data to be scanned reflection and with described image formation by rays on CCD;
It is characterized in that: a plurality of light-emitting diodes are along the printing opacity berm width direction shape that is arranged in a straight line, this sweep mechanism also comprises a scattering sheet, scattering sheet places a plurality of light-emitting diodes top, and the width of the width of scattering sheet and printing opacity platform about equally, so that the light emitted line of light-emitting diode is scattered on the data to be scanned.
2. falt bed scanner as claimed in claim 1 is characterized in that: this scattering sheet is a translucent sheet.
3. falt bed scanner as claimed in claim 2 is characterized in that: the cross section of this translucent sheet is roughly L-shaped.
4. falt bed scanner as claimed in claim 1 is characterized in that: this scattering sheet is a strip negative lens.
5. falt bed scanner as claimed in claim 1 is characterized in that: this sweep mechanism also comprises speculum, and speculum reflexes to the light of data reflection to be scanned on the camera lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520017288 CN2796271Y (en) | 2005-04-27 | 2005-04-27 | Plat form type scanner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520017288 CN2796271Y (en) | 2005-04-27 | 2005-04-27 | Plat form type scanner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2796271Y true CN2796271Y (en) | 2006-07-12 |
Family
ID=36814018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520017288 Expired - Fee Related CN2796271Y (en) | 2005-04-27 | 2005-04-27 | Plat form type scanner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2796271Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102625021A (en) * | 2011-01-26 | 2012-08-01 | 致伸科技股份有限公司 | Light guide module of scanning device |
-
2005
- 2005-04-27 CN CN 200520017288 patent/CN2796271Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102625021A (en) * | 2011-01-26 | 2012-08-01 | 致伸科技股份有限公司 | Light guide module of scanning device |
| CN102625021B (en) * | 2011-01-26 | 2014-07-30 | 致伸科技股份有限公司 | Light guide module of scanning device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4584916B2 (en) | Scanning backlight for flat panel display | |
| DE4125392C2 (en) | Image recording or input device | |
| DE69723542T2 (en) | IMAGE SENSOR | |
| US20010035986A1 (en) | Line illuminating device | |
| CN1477851A (en) | Linear illuminator and image sensor | |
| CN100345434C (en) | Substrate inspection apparatus | |
| KR20020041402A (en) | Illumination system, light mixing chamber and display device | |
| CN1584708A (en) | Plane light source device and display device provided with the same | |
| US8186863B2 (en) | Linear light source having light guide with tapered saw tooth structures | |
| TW201202804A (en) | Liquid crystal display device | |
| CN100345433C (en) | Line illuminator and image reader incorporating it | |
| CN2796271Y (en) | Plat form type scanner | |
| CN201561291U (en) | Linear light source having light guide body with prismatic rib-like reflection surface | |
| US8169673B2 (en) | Illuminating device and image reading apparatus | |
| TWI395976B (en) | Light projection device of scanner module and light arrangement method thereof | |
| JP2001202815A (en) | Linear light source unit | |
| DE112016000829B4 (en) | Light guide body, light source device and image reading device | |
| US20050248959A1 (en) | Light source module | |
| DE10164033B4 (en) | Optoelectronic component with a plurality of light sources | |
| CN102238310A (en) | Image scanning device | |
| CN101742027A (en) | Light projector for scanning module | |
| CN217904512U (en) | Image sensor with a plurality of pixels | |
| CN2916360Y (en) | Linear lighting device | |
| CN101051173A (en) | Projector and its integration column | |
| CN1577067A (en) | Projection display apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060712 Termination date: 20100427 |