CN2646982Y - Scanner - Google Patents
Scanner Download PDFInfo
- Publication number
- CN2646982Y CN2646982Y CN 200320109187 CN200320109187U CN2646982Y CN 2646982 Y CN2646982 Y CN 2646982Y CN 200320109187 CN200320109187 CN 200320109187 CN 200320109187 U CN200320109187 U CN 200320109187U CN 2646982 Y CN2646982 Y CN 2646982Y
- Authority
- CN
- China
- Prior art keywords
- scanner
- signal
- end processor
- analog
- optical signal
- 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 - Lifetime
Links
Images
Landscapes
- Facsimile Scanning Arrangements (AREA)
Abstract
A scanner has a movable scan head and a main board fixed on a scanner body, wherein, a charge couple component module and a front end processor are arranged on the scan head. A special application integration circuit is arranged on the main board. The charge couple component module can sense the analog light signal, and the special application integration circuit can communicate with the front end processor through a command interface to convert the analog light signal into digital light signal by the front end processor. The digital light signal is input into the special application integration circuit in the specification of the low-voltage difference signal to conduct the later image processing. The front end processor comprises an analog front end processing apparatus and a signal generation apparatus, wherein, the analog front end processing apparatus is used to convert the analog light signal into digital light signal, while the signal generation apparatus is used to generate the control signal needed by the charge couple component module and the front end processor.
Description
Technical field
The utility model relates to a kind of image processor, relates in particular to a kind of scanner.
Background technology
Along with science and technology is constantly progressive, multimedia integration has become current development priority with application.For data is reappeared with multimedia form, existing now various types of multimedia application are developed, and satisfy the audio-visual demand of consumer's diversity.For now, one of static image handling implement that scanner is the strongest beyond doubt, because the maturation of scanning technique and the rise of high-speed transfer interface allow scanner go deep into image work and the user of family, popularity greatly improves in the past few years in recent years.
The major function of scanner is to convert the content of the Hard copy file mode by scanning to e-file, makes things convenient for the user to propagate, put in order or preserve.In order loyal to present the original contents of Hard copy file, it is especially important that the quality of scanning of scanner just shows.As shown in Figure 1, shown traditional scanner calcspar.Scanner has comprised probe (Chassis) 110 movably and has been fixed on mainboard (Main Board) 150 two large divisions on the scanner body, dispose Charged Coupled Device (Charge-Coupled Device on the probe 110, CCD) module 115 is come receiving optical signals, and (the Application Specific Integrated Circuit of the Application Specific Integrated Circuit on the mainboard 150, ASIC) 151 and AFE (analog front end) (Analog FrontEnd, AFE) 153 of processing unit are used for controlling Charged Coupled Device module 115, its light signal that senses is captured out and changed, but become the signal of video signal of digitized processing.
With regard to the present practice, the probe 110 of scanner can progressively move along file to be scanned in when scanning, and this moment, Charged Coupled Device module 115 just can sense the light signal that comes from file reflection to be scanned (or transmission); Because this light signal is to present with the simulation kenel, therefore also can be referred to as analog optical signal.Treat that Charged Coupled Device module 115 sensor light signals finish, Application Specific Integrated Circuit 151 just can utilize control signal CTRL that analog optical signal RGB is captured out, carries out follow-up image processing.It should be noted that, because analog optical signal RGB can't directly handle with digital form, therefore must be by analog front end processing device 153 with its digitlization, after making analog optical signal RGB be converted to digital light signal (to call digital optical signal in the following text), can utilize bus B US with this digital optical signal input Application Specific Integrated Circuit 151, carry out later stage image processing work.
On the other hand, also be provided with drive motor 155 and internal memory 157 on the mainboard 150, drive motor 155 is to move according to the commands for controlling probe 110 that Application Specific Integrated Circuit 151 is imported, and for example special batch (-type) moves (Start-Stop) in the scanner; Internal memory 157 then is used for keeping in the scanning data, uses as data buffering area (buffer).
In practical application, because analog front end processing device 153 all is arranged on the mainboard 150 with Application Specific Integrated Circuit 151, therefore the wiring number of 110 of mainboard 150 and probes is very considerable, three signal line in analog optical signal RGB (be responsible for respectively transmission tricolor signal one of them), Φ 1, the Φ 2 among the CCD control signal CTRL, reset (reset), power supply (power), ground connection various types of signal such as (GND) have also been comprised.As shown in Figure 2, shown the CCD component design figure that Sony (Sony) is produced.CCD with the ILX558K of Sony is an example, its output input pin (pin) number is up to 12, thus, not only because the numerous manufacturing costs that cause of the number of holding wire are high, also because this control mode adopts traditional TTL/CMOS electrical specification, make power consumption very considerable (higher because of signal voltage, as to adopt 5V and 3.3V voltage), volume of transmitted data also can't improve.More seriously, the analog optical signal RGB that is passed back mainboard 150 by Charged Coupled Device module 115 is disturbed by environmental factor very easily, influence the quality of scanning except that obvious, electromagnetic interference (Electromagnetic Interference, EMI) problem also is difficult for getting rid of, it is especially serious that such shortcoming seems under high scanning resolution, directly influenced competitiveness of product.The competition of scanner industry now is very fierce, and manufacturer racks one's brains invariably and develops the technology of upgrading, the core competitiveness of coming enhanced products in order to improve quality of scanning.Therefore how to get rid of existing problems, improve quality of scanning and reduce production costs, just become current crucial problem.
Summary of the invention
In view of this, the purpose of this utility model just provides a kind of scanner, simplifies the number of holding wire, reduction data suffered electromagnetic interference when transmitting.
Another purpose of the present utility model is providing a kind of scanner, passes mainboard again back after utilizing probe that analog optical signal is converted to digital optical signal, to guarantee the validity of light signal.
According to above-mentioned purpose of the present utility model a kind of scanner is proposed, being summarized as follows of this scanner:
Scanner has probe movably and is fixed on mainboard on the scanner body, disposes Charged Coupled Device module and front-end processor on the probe, and mainboard then disposes Application Specific Integrated Circuit.When the Charged Coupled Device module senses behind analog optical signal, front-end processor can capture out and be converted to digital optical signal earlier with analog optical signal, utilize coding techniques that digital optical signal is encoded again, digital optical signal is imported the image processing work that Application Specific Integrated Circuit is carried out the later stage with the specification of low-voltage differential signal.Application Specific Integrated Circuit can be communicated by letter with front-end processor by instruction interface, carries out above-mentioned scanning imaging system; Wherein, these instruction interfaces are the interfaces that for example meet the serial transmission specification, as I
2C or RS-232 etc. reduce the wiring number.It should be noted that, dispose analog front end processing device and signal generation device in the front-end processor, analog front end processing device is used for analog optical signal is converted to digital optical signal, and signal generation device then is used for producing Charged Coupled Device module and the required control signal of analog front end processing device work.On the other hand, front-end processor can be controlled motor synchronizing signal input Application Specific Integrated Circuit drive motor and drive probe.The motor synchronizing signal can be utilized a dedicated signal lines input Application Specific Integrated Circuit, or when low-voltage differential signal is encoded the motor synchronizing signal is enrolled, and allows the motor synchronizing signal transmit together with digital optical signal.
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and in conjunction with the accompanying drawings, be described in detail as follows:
Description of drawings
What Fig. 1 showed is traditional scanner calcspar.
That Fig. 2 shows is the CCD component design figure that Sony is produced.
Fig. 3 shows is a kind of scanner calcspar according to a preferred embodiment of the utility model.
Embodiment
Main conception of the present utility model, be that analog front end processing device is configured in the probe, behind Charged Coupled Device module senses light signal, be converted into digital optical signal by analog front end processing device immediately, utilize digitized mode to export light signal to mainboard and handled.As shown in Figure 3, demonstration is a kind of scanner calcspar of a preferred embodiment of the utility model.Scanner comprises probe 310 and mainboard 350, dispose analog front end processing device 337 and signal generator 335 on the probe 310, analog front end processing device 337 is used for the analog optical signal RGB of 115 sensings of Charged Coupled Device module is converted to digital optical signal, 335 of signal generators utilize control signal CTRL, and CS controls the work of Charged Coupled Device module 115 and analog front end processing device 337 respectively.In actual applications, signal generator 335 and analog front end processing device 337 can be incorporated in the front-end processor 330, reduce manufacturing cost; Wherein front-end processor 330 can use the chip (for example Application Specific Integrated Circuit) that possesses specific function to be achieved.
On the other hand, Application Specific Integrated Circuit 351 can be communicated by letter with front-end processor 330 by instruction interface CMMD, allows front-end processor 330 that digital optical signal is sent back and carries out follow-up image processing work.The specification of these instruction interfaces CMMD can be I
2C or serial transmission interface specification, these serial transmission interfaces be for example UART Universal Asynchronous Receiver Transmitter (UniversalAsynchronous Receiver/Transmitter, UART) specification such as interface or RS-232 make the number of holding wire can reduce to minimum.In other words, when carrying out scanning imaging system, Application Specific Integrated Circuit 351 can be utilized instruction interface CMMD to assign instruction and give front-end processor 330, allow front-end processor 330 according to Application Specific Integrated Circuit 351 under instruction carry out image capture, conversion of signals and pass action such as data (for example table look-up, or work out communication protocol between front-end processor 330 and the Application Specific Integrated Circuit 351) back according to instruction.Be with the difference of conventional practice maximum, the instruction interface CMMD that Application Specific Integrated Circuit 351 can utilize the utmost point to simplify assigns instruction (as Φ 1, Φ 2 etc.), allow front-end processor 330 produce the required various control signals of scanning (control signal CTRL for example, CS); Just front-end processor 330 is to produce corresponding control signal CTRL according to instruction, and CS etc. carry out work such as the acquisition of light signal and conversion.These practices are different from over directly the control signal CTRL of the complexity processing mode by mainboard 150 input scans 110, so the line number between mainboard and probe can significantly reduce.
It should be noted that, interference-free in order to make front-end processor 330 pass the digital optical signal DOS of mainboard 350 back, after analog front end processing device 337 is converted to digital optical signal DOS with analog optical signal RGB, we can utilize front-end processor 330 earlier digital optical signal DOS to be encoded, (Low-Voltage DifferentialSignaling, the digital optical signal after form LVDS) will be encoded is passed Application Specific Integrated Circuit 351 back and is handled with low-voltage differential signal again.In practical operation, can utilize and differential (differential pair) transmission line be transmitted low-voltage differential signal LVDS, this is differential to be optical fiber (optical fiber) for example to transmission line.Also have, because the utility model is disposed at front-end processor 330 with analog front end processing device 337, directly control the work of Charged Coupled Device 115, therefore the specification of working as Charged Coupled Device 115 is changed to some extent, as long as the corresponding analog front end processing device 337 of revising just can satisfy different specification requirements, need not change the design of Application Specific Integrated Circuit 351.That is to say, can adopt standardized Application Specific Integrated Circuit 351 during fabrication, change the design of front-end processor 330 again according to the demand of different designs.Under framework of the present utility model, Application Specific Integrated Circuit 351 adopts standard design significantly to reduce cost, and front-end processor 330 can be revised according to different manufacturing specifications are flexibly corresponding, have enough design flexibility, therefore this framework can provide design manufacturer cheap total solution really, improves competitiveness of product.
Aspect the control of drive motor, the utility model is to utilize front-end processor 230 with motor synchronizing signal MSYNC input Application Specific Integrated Circuit 251, controls the running of drive motor.Note that owing to motor synchronizing signal MSYNC is produced according to the actual scanning situation by the scanning head end, so the motor action can closely cooperate with scanning imaging system accurately.In other words, the past drive motor is controlled by Application Specific Integrated Circuit 151, therefore the error between motor action and scanning imaging system takes place when scanning easily, as be short of perfect feedback (feedback) control, these errors very easily cause the distortion of scanning result, have a strong impact on quality of scanning.
In practical operation, motor synchronizing signal MSYNC certainly utilizes an exclusive holding wire input Application Specific Integrated Circuit 251 to realize above-mentioned conception, but thus, has just increased the wiring number of 250 of probe 210 and mainboards.The more appropriate practice, be when low-voltage differential signal LVDS encodes, motor synchronizing signal MSYNC to be enrolled, the control bit that just in the position definition of low-voltage differential signal LVDS, adds (or a some) motor synchronizing signal MSYNC, thus, motor synchronizing signal MSYNC just can transmit together with digital optical signal, does not have extra line and produces.
The disclosed scanner of the utility model the foregoing description is that analog front end processing device is disposed at the probe place, makes light signal digital form pass mainboard back, and these practices have the following advantages at least:
One, with serial mode transmission instruction and digital optical signal, can significantly reduce the number of holding wire, reduce hardware cost and make complexity.
Two, the electrical specification of low-voltage differential signal is adopted in the transmission of digital optical signal, and its signal potential is 3.3V or 1.5V, and power consumption is lower than TTL/CMOS specification, therefore can save power consumption.
Three, low-voltage differential signal has high frequency range (655Mbps) and the difficult characteristic of disturbing, and not only transmission range far also has splendid EMI characteristic, therefore can significantly improve quality of scanning.
Four, can adopt standardized Application Specific Integrated Circuit during fabrication, change the design of front-end processor again according to the demand of different designs, unlike when demand is changed, just need redesign Application Specific Integrated Circuit in the past, therefore can significantly improve design flexibility.
Five, front-end processor can be at different design requirement (the CCD module that for example adapts to different size) and the elasticity adjustment need redesign Application Specific Integrated Circuit by contrast with the past, and the development time significantly shortens, and makes product more competitive.
In sum; though used preferred embodiment to disclose the utility model above; yet it is not to be used for limiting the utility model; any those of ordinary skill in the art; in not breaking away from spirit and scope of the present utility model; can make various changes and retouching, therefore protection range of the present utility model should be as the criterion with the determined scope of appended claim.
Symbol description
110: probe
115: the Charged Coupled Device module
150: mainboard
151: Application Specific Integrated Circuit
153: analog front end processing device
155: drive motor
157: internal memory
310: probe
330: front-end processor
335: signal generation device
337: analog front end processing device
350: mainboard
351: Application Specific Integrated Circuit
RGB: analog optical signal
CTRL, CS: control signal
BUS: bus
DOS: digital optical signal
CMMD: instruction interface
MSYNC: motor synchronizing signal
Claims (15)
1. a scanner has an one scan head (Chassis) and a mainboard (Main Board), it is characterized in that, wherein said probe is to be electrically connected with described mainboard to fetch the execution scanning imaging system, and described scanner comprises:
(Charge-Coupled Device, CCD) module are disposed at described probe place to one Charged Coupled Device, are used for sensing one analog optical signal;
One front-end processor is disposed at described probe place, is coupled to described Charged Coupled Device module, and described front-end processor comprises:
(Analog Front End, AFE) processing unit are coupled to described Charged Coupled Device module to one AFE (analog front end), are used for producing described digital optical signal according to described analog optical signal; And
One signal generation device is coupled to described Charged Coupled Device module and described analog front end processing device, is used for producing described Charged Coupled Device module and the required control signal of described analog front end processing device work; And
One Application Specific Integrated Circuit (Application Specific Integrated Circuit, ASIC), be configured in described mainboard place and communicate by letter with described front-end processor, be used for handling the described digital optical signal that the described analog front end processing device in described front-end processor is imported by an instruction interface.
2. scanner as claimed in claim 1, it is characterized in that, wherein said digital optical signal is encoded in described front-end processor, and (Low-Voltage Differential Signaling, form LVDS) is sent to described Application Specific Integrated Circuit with low-voltage differential signal again.
3. scanner as claimed in claim 2 is characterized in that, wherein said low-voltage differential signal is to utilize one differential (differential pair) transmission line to be transmitted.
4. scanner as claimed in claim 1 is characterized in that, wherein said instruction interface is to meet UART Universal Asynchronous Receiver Transmitter (Universal Asynchronous Receiver/Transmitter, interface specification UART).
5. scanner as claimed in claim 1 is characterized in that wherein said instruction interface is to meet I
2The C interface specification.
6. scanner as claimed in claim 1 is characterized in that, wherein said instruction interface is to meet a serial (serial) coffret specification.
7. scanner as claimed in claim 6 is characterized in that, wherein said serial transmission interface specification is the RS-232 interface specification.
8. scanner as claimed in claim 2 is characterized in that wherein said scanner comprises a drive motor, and described drive motor is to work according to the control of described front-end processor.
9. scanner as claimed in claim 8 is characterized in that, wherein said drive motor is according to importing a motor synchronizing signal of described Application Specific Integrated Circuit from described front-end processor and working.
10. scanner as claimed in claim 9 is characterized in that, wherein said motor synchronizing signal is to be defined in the described low-voltage differential signal.
11. scanner as claimed in claim 8 is characterized in that, wherein said low-voltage differential signal is to utilize one differential transmission line to be transmitted.
12. scanner as claimed in claim 8 is characterized in that, wherein said instruction interface is the interface specification that meets UART Universal Asynchronous Receiver Transmitter.
13. scanner as claimed in claim 8 is characterized in that, wherein said instruction interface is to meet I
2The C interface specification.
14. scanner as claimed in claim 8 is characterized in that, wherein said instruction interface is to meet a serial coffret specification.
15. scanner as claimed in claim 14 is characterized in that, wherein said serial transmission interface specification is the RS-232 interface specification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320109187 CN2646982Y (en) | 2003-10-24 | 2003-10-24 | Scanner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320109187 CN2646982Y (en) | 2003-10-24 | 2003-10-24 | Scanner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2646982Y true CN2646982Y (en) | 2004-10-06 |
Family
ID=34305119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320109187 Expired - Lifetime CN2646982Y (en) | 2003-10-24 | 2003-10-24 | Scanner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2646982Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100446539C (en) * | 2005-11-25 | 2008-12-24 | 夏普株式会社 | Image processing apparatus, image reading apparatus, and image forming apparatus |
-
2003
- 2003-10-24 CN CN 200320109187 patent/CN2646982Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100446539C (en) * | 2005-11-25 | 2008-12-24 | 夏普株式会社 | Image processing apparatus, image reading apparatus, and image forming apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7917173B2 (en) | Multimedia data communication method and system | |
| CN112187362B (en) | Photoelectric transmission board card compatible with various communication interfaces | |
| CN1347059A (en) | Image processing system, image processing apparatus, image processing method and memory medium | |
| CN201213041Y (en) | Optical click-to-read machine | |
| CN210324144U (en) | Single-screen double-system switching display touch system for vehicle-mounted extension line expansion | |
| CN2646982Y (en) | Scanner | |
| US8300285B2 (en) | Scanning circuit structure | |
| US7382503B2 (en) | Scanning apparatus | |
| CN210640937U (en) | Scanning device and image forming apparatus | |
| CN1609889A (en) | Scanning instrument | |
| CN1988587A (en) | Image reading apparatus and reading method using the same | |
| CN201104894Y (en) | Supersonic diagnosis apparatus | |
| CN203350861U (en) | Vehicle separation screen multimedia system | |
| CN218868282U (en) | Multi-adaptive LVDS display screen signal transmission circuit | |
| CN101452678B (en) | Virtual differential analog front end circuit and image processing apparatus | |
| CN2629131Y (en) | Electronic dictionary | |
| CN2826481Y (en) | Camera shooting type word-stressing pen | |
| CN101521825B (en) | Image processor and method thereof | |
| US7405848B2 (en) | Scanning device and method using paired differential analog signals | |
| CN1118935C (en) | Signal conversion circuit with dynamically regulated reference voltage and crystal chip set using it | |
| CN219891562U (en) | Control circuit of multifunctional industrial control board | |
| CN210609444U (en) | Mural television and video signal transmission module thereof | |
| CN116521114B (en) | Image processing module, device and system | |
| CN213126222U (en) | Image conversion processing transceiver module based on FPD Link | |
| KR100986042B1 (en) | A source driver integrated circuit capable of interfacing multi pair data and display panel driving system including the integrated circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20131024 Granted publication date: 20041006 |