CN1405724A - Scanning head module - Google Patents
Scanning head module Download PDFInfo
- Publication number
- CN1405724A CN1405724A CN 01124130 CN01124130A CN1405724A CN 1405724 A CN1405724 A CN 1405724A CN 01124130 CN01124130 CN 01124130 CN 01124130 A CN01124130 A CN 01124130A CN 1405724 A CN1405724 A CN 1405724A
- Authority
- CN
- China
- Prior art keywords
- head module
- scanning head
- signal processing
- circuit
- optical sensor
- 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.)
- Pending
Links
Images
Abstract
The scanning head module integrates the light sensor and the signal processing circuit. The module is placed on the main board so as to leave out signal transmission line between the light sensor and the signal processing circuit. Moreover, it is not needed to drive the signal processing circuit by additional drive device. Thus, the electrical magnetic interference caused by the output signal of the light sensor is greatly reduced. Meanwhile, scanning head module can be simplified to be as the shielding construction for preventing the electrical magnetic interference.
Description
Technical field
The present invention relates to a kind of scanning system, particularly a kind of scanning head module of scanning system.
Background technology
With reference to Fig. 1.It is a kind of schematic cross-section of known scanner 10.Scanner 10 comprises a main body 11 and one scan 13.This main body 11 has a top transparent platform 12, for putting a file to be scanned.This scanner head 13 is installed in the below of this top transparent platform 12 movably, for scanning one file that is placed on this top transparent platform 12.Driving scanner head 13 by a gearing (not shown) slides on belt 14.Scanner head 13 generally includes a housing 15, a light source 16, an optical system that comprises a lens set 17 and lens 18, an optical sensor 19 and a drive unit 20 and is installed in wherein.Optical sensor 19 for example is an electric coupling device (charge coupled device), be used for detecting through the file reflection and thus the optical system guiding focus to document image on the optical sensor 19.With reference to Fig. 3, drive unit 20 comprises three transistors, is to be used for driving a signal processing unit that is installed on the mainboard 22.With reference to Fig. 2, this signal processing unit comprises an analog-digital converter (analog-to-digital converter) 23, one control circuit 24, for example is an Application Specific Integrated Circuit (application specific integrated circuit), a storer 25, an interface control circuit 26 and a motor control circuit 27.With reference to Fig. 3, the drive signal of the simulating signal of optical sensor 19 and drive unit 20 is to transmit signal processing unit so far via a cable 21.Analog-digital converter 23 is used for the analog signal conversion of optical sensor output is become digital signal, and exports this digital signal to control circuit 24.Storer 25 is in order to the data of access-control scheme 24.Interface control circuit 26 is delivered to a main frame (host) with the data of control circuit 24 via an interface 28.
In this known scanner 10, be connected in the simulating signal of the cable 21 transmission optical sensors 19 between scanner head 13 and the mainboard 22 and the drive signal of drive unit 20.When scanner head 13 moved forward and backward scanning document, cable 21 can be driven even be crooked.The result is that the simulating signal that is transmitted on the cable 21 very easily is subjected to electromagnetic interference (EMI), and makes last image output to be accepted.When the sweep velocity of scanning system increased, this electromagnetic interference (EMI) phenomenon more seemed serious.Moreover scanner head 13 is to be installed in dividually in the main body 11 of scanner 10 with signal processing unit.Scanner head 13 (comprising cable 21) and signal processing unit are to prevent that the shielding processing of electromagnetic interference (EMI) is also comparatively difficult.
In view of the above, demand providing a kind of scanning head module urgently, it can overcome the defective of known scanner, can meet the demand of high-velocity scanning system again.
Summary of the invention
Fundamental purpose of the present invention provides a kind of scanning head module, and it is that an optical sensor and a signal processing circuit are integrated on the mainboard, to reduce the noise of output signal.
Another object of the present invention provides a kind of scanning head module, and wherein an optical system, an optical sensor and a signal processing circuit are to be integrated in the module, and are installed on the mainboard.Simplify whereby in order to prevent the shielding construction of scanning head module electromagnetic interference (EMI).
Another purpose of the present invention provides a kind of scanning head module, one optical sensor and a signal processing circuit are integrated on the mainboard, make the signal transmssion line between optical sensor and the signal processing circuit to save, and the drive unit that signal processing circuit must be not extra yet.Therefore, can reduce the electromagnetic interference (EMI) of optical sensor output signal widely.
A further object of the present invention provides a kind of scanning head module, and it can meet the demand of high-velocity scanning system.
The present invention also has a purpose, provides a kind of scanning head module, can be applied to one scan instrument, duplicating machine, facsimile recorder and a multifunctional access jaws equipment (multi function peripheral).
According to above-described purpose, the invention provides a kind of scanning head module, comprise that at least a light source and has the housing of an optical system and a mainboard.This light source is to be used for shining a file to be scanned.This optical system comprises a lens set and a lens combination.This mainboard comprises an optical sensor and a signal processing circuit.This lens set is the irradiates light that is used for guiding from file, and focuses to optical sensor by lens combination.Signal processing circuit is the output signal that is used for handling optical sensor.
Description of drawings
Fig. 1 is a kind of schematic cross-section of known scanner;
Fig. 2 is the function block diagram of signal processing unit of the known scanner of Fig. 1;
Fig. 3 is the signal processing unit of knowing scanner and the transmission of the signal between the scanner head synoptic diagram of Fig. 1;
Fig. 4 is the schematic cross-section of the scanning head module of the present invention's one specific embodiment;
Fig. 5 is the function block diagram of the mainboard of Fig. 4.
Embodiment
With reference to Fig. 4, be the schematic cross-section of the scanning head module 40 of the present invention's one specific embodiment.Scanning head module 40 comprises a light source 41 and a housing 42.An optical system and a mainboard 45 of being made up of a lens set 43 and a lens combination 44 is installed in housing 42.Light source 41 can be a light emitting diode (light emitting diode) or a cold cathode fluorescent lamp (coldcathode fluorescent lamp).Mainboard 45 is formed by polycarbonate (polycarbonate).Be equiped with an optical sensor 46, a signal processing circuit 47, a storer 50, an interface control circuit 51 and a motor control circuit 52 on the mainboard 45.
Light source 41 shines a file to be scanned, and lens set 43 is guided the irradiates light optical path of file so far then, and focuses to optical sensor 46 by lens combination 44.
With reference to Fig. 5, be the function block diagram of mainboard 45.The simulating signal of optical sensor 46 outputs for example is a signal of video signal, transfers to signal processing circuit 47.Analog-to-digital conversion circuit 48 becomes digital signal with this analog signal conversion, handles this digital signal by control circuit 49 then, and control circuit 49 for example is an Application Specific Integrated Circuit.Storer 50 is for the data of access-control scheme 49.Interface control circuit 51 is connected to control circuit 49 and exports a main frame (host) to by an interface transmission control circuit 49.Interface control circuit 51 also can be installed in housing 42 outside appropriate positions of scanning head module 40, is beneficial to scanning head module 40 and is connected with interface between the main frame.Motor control circuit 52 is used to control the motor (not shown) of a gearing (not shown).This gearing carries out file scan in order to drive scanning head module 40.Yet motor control circuit 52 can be reequiped and is located at motor one side, and is not installed on the mainboard 45.
Scanning head module 40 is installed in the main body of one scan system, with scanning document movably.Scanning head module 40 can be fixedly arranged in the main body of one scan system in addition, and moves the device of carrying file to be scanned.Scanning head module 40 of the present invention can also can be applied to duplicating machine, facsimile recorder and multifunctional access jaws equipment for the scanner head (scannerhead) of making the one scan instrument.
Among the present invention, optical sensor 46 and signal processing circuit 47 are integrated on the mainboard 45.The simulating signal of optical sensor 46 can be sent to signal processing circuit 47 by transmission line.Therefore, the electromagnetic interference (EMI) of the simulating signal of optical sensor 46 can be reduced greatly, the signaling rate of scanning system can be improved simultaneously.Therefore, the storer 50 of scanning head module 40 is nonessential, also can save from scanning head module 40 of the present invention.Owing to needn't establish signal transmssion line between optical sensor 46 and the signal processing circuit 47, therefore signal between the two can not decayed in transmission course.Therefore, needn't install extra drive unit to provide driving force to signal processing circuit 47.Moreover scanning head module 40 of the present invention also makes the shielding construction that prevents electromagnetic interference (EMI) become comparatively to simplify.
The above is specific embodiments of the 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 spirit disclosed in this invention and changes or modification, all should be included in protection scope of the present invention.
Claims (12)
1. scanning head module is characterized in that: comprise at least:
One light source is in order to shine a file to be scanned;
One housing, comprise an optical system and a mainboard, wherein, this optical system comprises a lens set and a lens combination, this mainboard comprises an optical sensor and a signal processing circuit, this lens set is guided the irradiates light from this document, and focuses to this optical sensor by this lens combination, and this signal processing circuit is handled the output signal of this optical sensor.
2. scanning head module according to claim 1, it is characterized in that: above-mentioned signal processing circuit comprises an Application Specific Integrated Circuit (application specific integratedcircuit), this Application Specific Integrated Circuit further comprises an analog-to-digital conversion circuit, converts digital signal in order to the output signal with this optical sensor.
3. scanning head module according to claim 1, it is characterized in that: above-mentioned signal processing circuit comprises an analog-to-digital conversion circuit and an Application Specific Integrated Circuit, this analog-to-digital conversion circuit converts digital signal in order to the output signal with this optical sensor, and this Application Specific Integrated Circuit is in order to handle this digital signal.
4. scanning head module according to claim 1 is characterized in that: above-mentioned mainboard also comprises a motor control circuit.
5. scanning head module according to claim 1, it is characterized in that: above-mentioned mainboard also comprises an interface control circuit, and this interface control circuit further comprises a universal serial bus (universal series bus) and an IEEE1394 generic serial port (IEEE1394series bus).
6. scanning head module according to claim 1 is characterized in that: above-mentioned scanning head module is fixedly arranged in the body of one scan system.
7. scanning head module is characterized in that: comprise at least:
One light source is in order to shine a file to be scanned;
One housing, it comprises an optical system and a mainboard, wherein, this optical system comprises a lens set and a lens combination, this mainboard comprises an optical sensor, a signal processing circuit, an internal memory and an interface control circuit, this lens set guiding is from the irradiates light of this document, and focus to this optical sensor by this lens combination, this signal processing circuit is handled the output signal of this optical sensor, and the data of this this signal processing circuit of memory access, this interface control circuit exports the data of this signal processing circuit to a main frame (host) via an interface.
8. scanning head module according to claim 7, it is characterized in that: above-mentioned signal processing circuit comprises an Application Specific Integrated Circuit (application specific integratedcircuit), this Application Specific Integrated Circuit further comprises an analog-to-digital conversion circuit (analog-to-digital converter circuit), converts digital signal in order to the output signal with this optical sensor.
9. scanning head module according to claim 7, it is characterized in that: above-mentioned mainboard also comprises an interface control circuit, and this interface control circuit further comprises a universal serial bus (universal series bus) and an IEEE1394 generic serial port (IEEE1394series bus).
10. scanning head module according to claim 7, it is characterized in that: above-mentioned signal processing circuit comprises an analog-to-digital conversion circuit and an Application Specific Integrated Circuit, this analog-to-digital conversion circuit converts digital signal in order to the output signal with this optical sensor, and this Application Specific Integrated Circuit is in order to handle this digital signal.
11. scanning head module according to claim 7 is characterized in that: above-mentioned mainboard also comprises a motor control circuit.
12. scanning head module according to claim 7 is characterized in that: above-mentioned scanning head module is fixedly arranged in the body of one scan system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01124130 CN1405724A (en) | 2001-08-15 | 2001-08-15 | Scanning head module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01124130 CN1405724A (en) | 2001-08-15 | 2001-08-15 | Scanning head module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1405724A true CN1405724A (en) | 2003-03-26 |
Family
ID=4665524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01124130 Pending CN1405724A (en) | 2001-08-15 | 2001-08-15 | Scanning head module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1405724A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7382503B2 (en) | 2003-09-03 | 2008-06-03 | Avision Inc. | Scanning apparatus |
| CN100416588C (en) * | 2005-02-09 | 2008-09-03 | 电装波动株式会社 | Optical information readout apparatus |
-
2001
- 2001-08-15 CN CN 01124130 patent/CN1405724A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7382503B2 (en) | 2003-09-03 | 2008-06-03 | Avision Inc. | Scanning apparatus |
| CN100416588C (en) * | 2005-02-09 | 2008-09-03 | 电装波动株式会社 | Optical information readout apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1215237A (en) | Plug-socket type transmission device and plug-socket type photo/electricity transmission device | |
| US4549206A (en) | Method and apparatus for examining printed circuit board provided with miniaturized electronic parts | |
| US7633656B2 (en) | Image reading unit and image reading apparatus having the same | |
| CN1221933A (en) | Contact type image sensor and information processing apparatus | |
| JPH09305694A (en) | Data symbol reader | |
| US5821994A (en) | Image pickup and data processing apparatus having a plurality of special-purpose detachable substrates | |
| CN1637581A (en) | Apparatus for switching optical low pass filters for use in optical instrument | |
| KR20030067592A (en) | Illumination apparatus and image reading apparatus | |
| CN1405724A (en) | Scanning head module | |
| CN1194529C (en) | Image fetching system | |
| US20020154346A1 (en) | Scanning head module | |
| CN1403998A (en) | Pattern recognizing apparatus | |
| US20030117671A1 (en) | Image scanner having multiple scanning windows | |
| US20080116360A1 (en) | Image input device | |
| CN206759573U (en) | Sensor group and contact type image sensor module | |
| CN1190944C (en) | Image scanner with multiple scanning lines | |
| TW524010B (en) | Scanning head module | |
| CN2716855Y (en) | Optical machine module applied to image scanning device | |
| JP2006261899A (en) | Image reader | |
| CN213303068U (en) | Automatic detection device for color of wiring harness | |
| US7298529B2 (en) | Method and system for imaging a transparent media object | |
| JP2008015265A (en) | Photoelectric conversion module and connector for high-speed transmission | |
| CN1901598A (en) | Optic scan module structure of scanning device | |
| CN200973132Y (en) | Scanning device and its optical module | |
| CN1550820A (en) | Compact integrated optical imaging assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |