CN2297749Y - Non-preheating image scanner - Google Patents
Non-preheating image scanner Download PDFInfo
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- CN2297749Y CN2297749Y CN 97209879 CN97209879U CN2297749Y CN 2297749 Y CN2297749 Y CN 2297749Y CN 97209879 CN97209879 CN 97209879 CN 97209879 U CN97209879 U CN 97209879U CN 2297749 Y CN2297749 Y CN 2297749Y
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- 230000006698 induction Effects 0.000 claims description 9
- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 210000004556 brain Anatomy 0.000 claims 1
- 238000012423 maintenance Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000032683 aging Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
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- 238000000034 method Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
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Abstract
The utility model relates to a non-preheating image scanner. The utility model comprises a light reflecting device which generates light source signals and reflects the light source signals to obtain brightness reflecting signals, an image sensing element and a brightness control compensating device, wherein, the image sensing element obtains scanned object reflecting signal and brightness reflecting signal reflected by the scanned object because the light source signals are projected onto the scanned object and outputs respectively an image sensing signal and a reference brightness signal; the brightness control compensating device is electrically connected with the image sensing element, and the brightness control compensating device utilizes the reference brightness signal and the compensating image sensing signal. The utility model does not influence the scanning effect because the lamp tube is not preheated or the lamp tube is aged.
Description
The utility model relates to a kind of pre-heated device of image scanning of exempting from, and it can predict light-source brightness automatically and be compensated, and quality of scanning is stable.
The light source that generally is used for image scanner is the white fluorescent fluorescent tube, it is divided into usually: cold-cathode tube (CCFT) and general fluorescent tube, but aforementioned two kinds of light sources all have common shortcoming, promptly behind lamp tube starting, its luminosity can be passed significantly in time to be increased, and needs through after four to five minutes, and light-source brightness just tends towards stability, thereby must first warming-up number when using minute, in the hope of obtaining stable scanning effect.Have, lighting tube brightness can be aging with successively decreasing because of fluorescent tube, thereby influence swept brilliance again.With regard to present technology, desire to address the above problem, mechanism assemblies such as optical fiber must be installed in scanner, its process is numerous and diverse, and both expensive influences economic benefit.
The purpose of this utility model is to provide a kind of pre-heated shadow rubber scanister of exempting from, and it can be compensated unstable light source, and carries out stable scan operation with equilibrium brightness.
The purpose of this utility model is to realize like this, a kind of pre-heated device of image scanning of exempting from promptly is provided, be used to have the image scanner of a light source and a focus reflection device, describedly exempt from pre-heated device of image scanning and comprise: a light signal reflection that is produced by described light source obtains the light reflecting device of a brightness reflected signal; One image induction element, it is projected to a scanned reflection by described light signal and obtains scanned reflected signal, and exports a video sensing signal and a reference luminance signal respectively by this brightness reflected signal; One is electrically connected on described image induction element, and utilizes described reference luminance signal to compensate the luminosity control compensation device of described video sensing signal.
The advantage of the utility model device is that its installation is simple and easy, with low cost, and quality of scanning is stable, and practicality is good.
Below in conjunction with accompanying drawing, embodiment of the present utility model is described, wherein:
Fig. 1 is fluorescent tube preheating time and its brightness relationship figure;
Fig. 2 is fluorescent tube service time and its brightness relationship figure;
Fig. 3 picks up synoptic diagram for scanned reflected signal of the utility model and light reflected signal;
Fig. 4 is the utility model video sensing signal and reference luminance signal time pulse figure;
Fig. 5 is the utility model brightness controlling device circuit block diagram;
Fig. 6 is the utility model video sensing signal and reference luminance signal color range matter figure.
See also Fig. 1, it is fluorescent tube preheating time and brightness relationship figure, and lighting tube brightness need can tend towards stability through several minutes; And see also Fig. 2, it is fluorescent tube service time and brightness relationship figure.Lighting tube brightness successively decreases because of fluorescent tube is aging, and the purpose of this utility model is to improve the shortcoming that the flashing photographic fixing rings quality of scanning.
See also Fig. 3, it picks up synoptic diagram for scanned reflected signal of the utility model and light reflected signal.Comprising light source 31, bottom scanning window (Bottom window) 32, blank sheet of paper 33, scanned 34, focus reflection device 35, line style image sensor 36, light signal S1, light reflected signal S2, scanned reflected signal S3.Wherein, blank sheet of paper 33 is installed on bottom scanning window 32 tops, the light signal S1 that it is produced because of this light source 31, reflection obtains light reflected signal S2, again via this focus reflection device 35, throws this light reflected signal S2 to line style image sensor 36, and the scanned 34 light signal S1 that produced because of this light source 31, reflection obtains this scanned reflected signal S3, by this focus reflection device 35, throws this scanned reflected signal S3 to line style image sensor 36.
See also Fig. 4 again, it is the utility model image sensing signal and reference luminance signal time pulse figure.The line style image sensor 36 of scanner is made up of the pixel (pixel) of big quantity, each pixel correspondence is again experienced the light intensity generation direct ratio quantity of electric charge, see through train of impulses by the feed-in of digital control circuit institute, can in regular turn the charge conversion of each pixel be become the pattern serial output of voltage, the number of pixels of the line style image sensor 36 that common scanner is selected for use all can surpass actual required, therefore, except scanned 34 pixels that take, some pixel can luminance signal for reference be used.For example indicate 1～No. 2160 time pulse among the figure for scanning the serial video sensing signal that obtains, represent the utility model reference luminance signal and indicate D1～D6 time pulse.
See also Fig. 5, it is the circuit block diagram of the utility model brightness controlling device embodiment.Comprising: line style image sensor 51, amplify and bias voltage adjustment circuit 52 sample-and-hold circuit 53, positioning circuit (Clamping) 54, analogy/digital quantizer 55, the integrated circuit of special-purpose (ASIC) 56.Among Fig. 5, after this light reflected signal S2 and scanned reflected signal S3 among line style image sensor 51 reception Fig. 3, the electric charge of pixel induction is converted into voltage system serial output, and after delivering to amplification and bias voltage adjustment circuit 52, export suitable video sensing signal and reference luminance signal, the mat sample-and-hold circuit 53 again, positioning circuit 54 detects reference luminance signal and will be with the video sensing signal and the reference luminance signal of position are imported one analogy/digital quantizer 55 surely, again numerical data reached in the integrated circuit (ASIC) of special-purpose, so that the video sensing signal is compensated thereafter.
See also Fig. 6, it is the utility model video sensing signal and reference luminance signal color range matter figure.When blank sheet of paper 33 is installed on the scanner bottom scanning window 32, can set its color range matter is 255, therefore, when its reference luminance signal color range matter of the 1st optical sensor line that scans is 202, video sensing signal color range matter is 105,153......200 the time, because of reference luminance signal color range matter be 202 with the difference of the color range matter of setting 255 be-53, then software can automatic color range matter with the video sensing signal add 53, promptly compensating video sensing signal color range matter is 158,206......253 after, the image output induced signal obtains contrasting obviously and the stable image of quality of scanning by compensation each bar optical sensor line thereafter.
Claims (11)
1. exempt from pre-heated device of image scanning for one kind, be used to have the image scanner of a light source and a focus reflection device, describedly exempt from pre-heated device of image scanning and comprise: a light signal reflection that is produced by described light source obtains the light reflecting device of a brightness reflected signal; One image induction element, it is projected to a scanned reflection by described light signal and obtains scanned reflected signal, and exports a video sensing signal and a reference luminance signal respectively by this brightness reflected signal; One is electrically connected on described image induction element, and utilizes described reference luminance signal to compensate the luminosity control compensation device of described video sensing signal.
2. as claimed in claim 1ly exempt from pre-heated device of image scanning, it is characterized in that described light reflecting device is installed on the optical path of described light signal.
3 as claimed in claim 2ly exempt from pre-heated device of image scanning, it is characterized in that described light reflecting device is installed on the lens of image scanner.
4. as claimed in claim 3ly exempt from pre-heated device of image scanning, it is characterized in that described lens are bottom scanning window.
5. as claimed in claim 1ly exempt from pre-heated device of image scanning, it is characterized in that described light reflecting device is made with reflectorized material.
6. as claimed in claim 5ly exempt from pre-heated device of image scanning, it is characterized in that described reflectorized material is a reflective paster.
7. as claimed in claim 6ly exempt from pre-heated device of image scanning, it is characterized in that described reflective paster also comprises a blank sheet of paper.
8. as claimed in claim 1ly exempt from pre-heated device of image scanning, it is characterized in that described image induction element is a line style image sensor.
9. as claimed in claim 1ly exempt from pre-heated device of image scanning, described brilliance control compensation system is handled the described video sensing signal and the described reference luminance signal of described image induction element output, it is characterized in that, it comprises: an amplification and a bias voltage that is electrically connected on described image induction element adjusted circuit, it receives the described video sensing signal and the described reference luminance signal of described image induction element output, and exports described video sensing signal and described reference luminance signal through amplifying bias voltage; One is electrically connected on the sample-and-hold circuit of described amplification and bias voltage adjustment circuit, and its mat described amplification that pulse is taken a sample and maintenance receives between a period of time and bias voltage are adjusted described video sensing signal and the described reference luminance signal that circuit is exported; One is electrically connected on the positioning circuit that described sample-and-hold circuit and described amplification and bias voltage are adjusted circuit, and it is compensated for as together position surely with described video sensing signal and described reference luminance signal; And one be electrically connected on analogy/digital quantizer that described positioning circuit and analogy ground is output as described video sensing signal and the conversion of described reference luminance signal the numeric type that the power supply brain uses.
10. as claimed in claim 9ly exempt from pre-heated device of image scanning, it is characterized in that described brilliance control compensation system also comprises the compensating circuit of the described video sensing signal of a compensation.
11. as claimed in claim 1ly exempt from pre-heated device of image scanning, it is characterized in that the compensating movement of described video sensing signal is carried out by a computer software.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97209879 CN2297749Y (en) | 1997-04-01 | 1997-04-01 | Non-preheating image scanner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97209879 CN2297749Y (en) | 1997-04-01 | 1997-04-01 | Non-preheating image scanner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2297749Y true CN2297749Y (en) | 1998-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97209879 Expired - Fee Related CN2297749Y (en) | 1997-04-01 | 1997-04-01 | Non-preheating image scanner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2297749Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1332551C (en) * | 2004-02-05 | 2007-08-15 | 光宝科技股份有限公司 | Optical scanner |
| CN110705506A (en) * | 2019-02-23 | 2020-01-17 | 友达光电股份有限公司 | Fingerprint sensing device |
-
1997
- 1997-04-01 CN CN 97209879 patent/CN2297749Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1332551C (en) * | 2004-02-05 | 2007-08-15 | 光宝科技股份有限公司 | Optical scanner |
| CN110705506A (en) * | 2019-02-23 | 2020-01-17 | 友达光电股份有限公司 | Fingerprint sensing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |