CN100397860C - Image signal compounding module and method - Google Patents
Image signal compounding module and method Download PDFInfo
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- CN100397860C CN100397860C CNB2004100984990A CN200410098499A CN100397860C CN 100397860 C CN100397860 C CN 100397860C CN B2004100984990 A CNB2004100984990 A CN B2004100984990A CN 200410098499 A CN200410098499 A CN 200410098499A CN 100397860 C CN100397860 C CN 100397860C
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Abstract
The present invention discloses an image signal compounding module and a method thereof for being applied to a double-face scanner. The image signal compounding module comprises a first light-sensitive element, a second light-sensitive element, an analog adder, an analog-digital converter and a controller of a scanner, wherein the output ends of the first light-sensitive element and the second light-sensitive element are connected to the input end of the analog adder in parallel; the output end of the analog adder is connected to the input end of the analog-digital converter; the output end of the analog-digital converter is connected to the controller of the scanner. The controller of the scanner is used for respectively conveying drive signals of the first light-sensitive element and the second light-sensitive element to the first light-sensitive element and the second light-sensitive element. The drive signals of the first light-sensitive element and the second light-sensitive element make the first light-sensitive element and the second light-sensitive element alternatively output image signals respectively obtained by the first light-sensitive element and the second light-sensitive element. The image signals are orderly transmitted to the controller of the scanner by the analog adder and the analog-digital converter.
Description
Technical field
The present invention relates to synthetic module of a kind of signal of video signal and method, relate in particular to a kind of signal of video signal that utilizes the single simulation digital quantizer to receive the signal of video signal of processing two group image sensing elements output and synthesize module, and the synthetic method of these signal of video signal.
Background technology
See also Figure 13 and Figure 14, this two figure is depicted as a kind of solution of common high speed Double face scanner, this solution adopts independently, and photo-sensitive cell I and photo-sensitive cell II obtain the signal of video signal of scanning document both sides respectively, and be every group of photo-sensitive cell corresponding analog-digital converter (ADC that arranges in pairs or groups, Analog-DigitalConverter), be photo-sensitive cell I collocation analog-digital converter I, photo-sensitive cell II collocation analog-digital converter II, at this moment, the analog image signal OS (Optical Signal) that independently photo-sensitive cell I and photo-sensitive cell II transmitted separately of analog-digital converter I and analog-digital converter II changes into digital signal and is sent to the scanner controller and does further processing.The photo-sensitive cell that this solution adopts can use charge coupled cell (CCD, Charge Coupled Device), contact-type image inductor (CIS, Charge Coupled Device) or complementary metal oxide semiconductors (CMOS) (CMOS, Charged Metal Oxide Silicon) etc.
Wherein, the drive signal that photo-sensitive cell sends at the photo-sensitive cell drive circuit (comprises clock signal PHi1, PHi2, reset signal RS and clamp signal CP) control under, serial is exported the signal of video signal of a pixel to analog-digital converter in each clock cycle T.
But, this solution need adopt very complicated scanner controller could handle the signal of video signal that two analog-digital converters transmit simultaneously in the same clock cycle, this causes current high speed Double face scanner manufacturing cost high, is difficult to popularization and application.
In addition, because the resolution specification of present scanner mostly is 600dpi (dot/inch) or higher greatly, and for the scanning of literal figures, it is just enough that resolution reaches 300dpi.With the scanner of resolution 600dpi, the image of the long scope of per 1 inch will can be exported fully through 600 clock cycle when exporting via the video sensing cell translation in the CCD Image Sensor on the scanned document.Therefore, if the user only needs the scan-image of 300dpi, then each side of file to be scanned half pixel of only exporting the 600dpi esolving degree just can, the signal of video signal amount that is the pixel exported of scan-image and the scan-image of single-sweep 600dpi of duplex scanning 300dpi equates, so when resolution requirement was low, the function of utilizing existing single-sweep instrument controller to reach duplex scanning just became possibility.
Summary of the invention
Main purpose of the present invention is to provide synthetic module of a kind of signal of video signal and method, by controlling the signal of video signal output of two photo-sensitive cells, and utilize analog adder to synthesize two group image signals, only need an analog-digital converter and plain scan instrument controller to realize duplex scanning and reach.
For achieving the above object, the invention provides the synthetic module of a kind of signal of video signal, comprising: one first photo-sensitive cell and one second photo-sensitive cell; An analog adder, the output of described first photo-sensitive cell and second photo-sensitive cell is connected in parallel to the input of analog adder; An analog-digital converter, the output of described analog adder is connected to the input of analog-digital converter; And a scanner controller, described analog-digital converter output is connected to the scanner controller; Wherein, the signal of video signal of file to be scanned both sides obtains by first photo-sensitive cell and one second photo-sensitive cell respectively, passes through analog adder then successively, and analog-digital converter is sent to the scanner controller.
For achieving the above object, the present invention also provides a kind of signal of video signal synthetic method, comprising: one first photo-sensitive cell and one second photo-sensitive cell are provided; An analog adder is provided, the output of described first photo-sensitive cell and second photo-sensitive cell is connected in parallel to the input of analog adder; An analog-digital converter is provided, the output of described analog adder is connected to the input of analog-digital converter; A scanner controller is provided, described analog-digital converter output is connected to the scanner controller; Carry two groups of drive signal to the first photo-sensitive cells and second photo-sensitive cell respectively by the scanner controller, the first photo-sensitive cell drive signal and the second photo-sensitive cell drive signal make first photo-sensitive cell and second photo-sensitive cell alternately export the signal of video signal that is obtained separately, and are sent to the scanner controller through analog adder, analog-digital converter successively.
For achieving the above object, the present invention also provides a kind of signal of video signal synthetic method, is used for the signal of video signal of synthetic duplex scanning, comprising: one first photo-sensitive cell and one second photo-sensitive cell are provided; An analog adder is provided, the output of described first photo-sensitive cell and second photo-sensitive cell is connected in parallel to the input of analog adder; An analog-digital converter is provided, the output of described analog adder is connected to the input of analog-digital converter; A scanner controller is provided, described analog-digital converter output is connected to the scanner controller; Carry the first photo-sensitive cell drive signal and second photo-sensitive cell drive signal to the first photo-sensitive cell and second photo-sensitive cell respectively by the scanner controller, this the first photo-sensitive cell drive signal and the second photo-sensitive cell drive signal include clock signal and reset signal, the first photo-sensitive cell drive, first photo-sensitive cell output pixel signal that obtains, the reset signal of the first photo-sensitive cell drive signal is removed the pixel signal of first photo-sensitive cell in specific period output; The second photo-sensitive cell drive, second photo-sensitive cell output pixel signal that obtains, the reset signal of the second photo-sensitive cell drive signal is removed the pixel signal of second photo-sensitive cell in specific period output, and the pixel signal that first photo-sensitive cell and second photo-sensitive cell are exported is sent to the scanner controller through analog adder, analog-digital converter successively.
In sum, synthetic module of signal of video signal of the present invention and method are by the control to photo-sensitive cell, make first photo-sensitive cell and second photo-sensitive cell alternate transmission signal of video signal in the clock cycle, and, can have single-sweep instrument framework now and directly be upgraded to Double face scanner and not need expensive complicated dedicated scan instrument controller by the signal that synthetic two photo-sensitive cells of analog adder are exported.
In order further to understand feature of the present invention and technology contents, see also following about detailed description of the present invention and accompanying drawing, yet appended graphic only provide with reference to and the explanation usefulness, be not to be used for the present invention is limited.
Description of drawings
The present invention is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the solution schematic diagram of synthetic module of signal of video signal of the present invention and method.
Fig. 2 is the embodiment circuit diagram of synthetic module of signal of video signal of the present invention and method.
Fig. 3 is the another embodiment circuit diagram of synthetic module of signal of video signal of the present invention and method.
Fig. 4 and Fig. 5 are the driving method schematic diagram of synthetic module of signal of video signal of the present invention and method.
Fig. 6 is the composite signal oscillogram of synthetic module of signal of video signal of the present invention and method.
Fig. 7 and Fig. 8 are the driving method schematic diagram of synthetic module of signal of video signal of the present invention and method.
Fig. 9 is the composite signal oscillogram of synthetic module of signal of video signal of the present invention and method.
Figure 10 and Figure 11 are the driving method schematic diagram of synthetic module of signal of video signal of the present invention and method.
Figure 12 is the composite signal oscillogram of synthetic module of signal of video signal of the present invention and method.
Figure 13 is the fundamental diagram of existing Double face scanner.
Figure 14 is the driving method schematic diagram of existing photo-sensitive cell.
Embodiment
See also Fig. 1, the synthetic module of signal of video signal of the present invention comprises one first photo-sensitive cell, one second photo-sensitive cell, an analog adder, an analog-digital converter and scanner controller, in the time of scanner scanning file both sides, first photo-sensitive cell and second photo-sensitive cell obtain the signal of video signal of file both sides respectively under the control of the drive signal that drive circuit sent, it is synthetic to export analog adder then to, analog image signal after synthetic is delivered to the scanner controller and is done further processing after analog-digital converter converts digital image signal to.
See also Fig. 2, this figure is depicted as the circuit theory diagrams of the preferred embodiment of the synthetic module of signal of video signal of the present invention.In this embodiment, provide first photo-sensitive cell 11 and second photo-sensitive cell 13 to obtain the signal of video signal of file both sides, the output of this first photo-sensitive cell 11 and second photo-sensitive cell 13 is connected in parallel to the input of operational amplifier 32, first resistance 21 of between first photo-sensitive cell 11 and operational amplifier 32, connecting, second resistance 23 of between second photo-sensitive cell 13 and operational amplifier 32, connecting, the output of operational amplifier 32 is connected to the input of analog-digital converter 33, and the output of analog-digital converter 33 is connected to scanner controller 35.Therefore, the signal of video signal of exporting respectively from first photo-sensitive cell 11 and second photo-sensitive cell 13 through operational amplifier 32 synthetic after, convert digital image signal to by analog-digital converter 33 again, be sent to scanner controller 35 at last and do further processing.
See also Fig. 3, this figure is depicted as the circuit theory diagrams of the synthetic another embodiment of module of signal of video signal of the present invention, the output of first photo-sensitive cell 11 and second photo-sensitive cell 13 is connected in parallel to an end of signal combined resistance 31, first resistance 21 of between first photo-sensitive cell 11 and signal combined resistance 31, connecting, second resistance 23 of between second photo-sensitive cell 13 and signal combined resistance 31, connecting, the other end of signal combined resistance 31 is connected to the input of analog-digital converter 33, and the output of analog-digital converter 33 is connected to scanner controller 35.Therefore, the signal of video signal of exporting respectively from first photo-sensitive cell 11 and second photo-sensitive cell 13 through signal combined resistance 31 synthetic after, convert digital image signal to by analog-digital converter 33 again, be sent to scanner controller 35 at last and do further processing.
See also Fig. 4 and Fig. 5, the driving method of synthetic module of signal of video signal of the present invention and the photo-sensitive cell that method adopted comprises: carry one group of first photo-sensitive cell drive signal, 41 to first photo-sensitive cells 11, this first photo-sensitive cell drive signal 41 comprises clock signal and control signal, clock signal comprises the first clock signal PHi1-I and the second clock signal PHi2-I that frequency is identical, control signal comprises reset signal RS-I and clamp signal CP-I, makes first photo-sensitive cell, 11 output image signal OS-I.Wherein, clock signal PHi1-I and PHi2-I are used to control signal of video signal output, and when the current potential of clock signal reversed, photo-sensitive cell was promptly exported a pixel signal; Reset signal is used to remove pixel signal, and when the level of reset signal reversed, this moment, the pixel signal of output was removed.Carry one group of second photo-sensitive cell drive signal, 43 to second photo-sensitive cells 13, make its output image signal OS-II, the second photo-sensitive cell drive signal 43 comprises the first clock signal PHi1-II, second clock signal PHi2-II, reset signal RS-II and clamp signal CP-II.At the signal of video signal 1-I and the 3-I of odd cycle periods such as T0-T1 and T2-T3 output odd point pixel, the signal of video signal 2-I of the even number point pixel that first photo-sensitive cell 11 is exported and the 4-I signal RS-I that is reset gets rid of first photo-sensitive cell 11 under the control of the first photo-sensitive cell drive signal 41.At the signal of video signal 2-II and the 4-II of even cycle periods such as T1-T2 and T3-T4 output even number point pixel, the signal of video signal 1-II of the odd point pixel that second photo-sensitive cell 13 is exported and the 3-II signal RS-II that is reset gets rid of second photo-sensitive cell 13 under the control of the second photo-sensitive cell drive signal 43.
First photo-sensitive cell 11 and second photo-sensitive cell 13 are synthetic through operational amplifier 32 or signal combined resistance 31 at the signal of video signal OS-I and the OS-II of different period outputs, thus output composite signal as shown in Figure 6.
Under the control of this driving method, the signal of video signal that first photo-sensitive cell 11 and second photo-sensitive cell 13 are obtained separately in the clock cycle output that replaces, for each photo-sensitive cell, it promptly is the pixel signal that first photo-sensitive cell 11 is obtained in the output of odd cycle period, the pixel signal that second photo-sensitive cell 13 is obtained in the output of even cycle period, perhaps first photo-sensitive cell 11 is exported the pixel signal that is obtained in the even cycle period, the signal of video signal that second photo-sensitive cell 13 is obtained in the output of odd cycle period.Synthetic through operational amplifier 32 or signal combined resistance 31 again, and analog-digital converter 33 conversions, deliver to 35 outputs of scanner controller at last.Such signal of video signal both can satisfy user's demand, can be handled by common scanner controller again, thereby reduce manufacturing cost.
See also Fig. 7 and Fig. 8, the another driving method of synthetic module of signal of video signal of the present invention and the photo-sensitive cell that method adopted comprises: carry the first photo-sensitive cell drive signal 41 ' to first photo-sensitive cell 11 and carry the second photo-sensitive cell drive signal 43 ' to second photo-sensitive cell 13, make its output image signal OS-I and OS-II respectively, wherein the first photo-sensitive cell drive signal 41 ' the first clock signal PHi1-I and the second photo-sensitive cell drive signal 43 ' the period of change (Duty Cycle) of the first clock signal PHi1-II differ a transmission cycle T, the first photo-sensitive cell drive signal 41 ' second clock signal PHi2-I and the second photo-sensitive cell drive signal 43 ' the period of change of second clock signal PHi2-II differ a transmission cycle T.
Under the control of above-mentioned driving method, first photo-sensitive cell 11 is at T0-T1, T2-T3, output pixel 1-I in the odd cycle such as T4-T5,2-I, the signal of video signal of 3-I etc., second photo-sensitive cell 13 is at T1-T2, T3-T4, output pixel 1-II in the even cycle such as T5-T6,2-II, the signal of video signal of 3-II etc., perhaps, first photo-sensitive cell 11 is at T1-T2, T3-T4, output pixel 1-I in the even cycle such as T5-T6,2-I, the signal of video signal of 3-I etc., second photo-sensitive cell 13 is at T0-T1, T2-T3, output pixel 1-II in the odd cycle such as T4-T5,2-II, the signal of video signal of 3-II etc.
Signal of video signal OS-I that first photo-sensitive cell 11 and second photo-sensitive cell 13 are exported respectively and OS-II are synthetic through operational amplifier 32 or signal combined resistance 31, thus output composite signal as shown in Figure 9.Through analog-digital converter 33 conversions, deliver to 35 outputs of scanner controller at last again.This kind composite signal can be handled output by plain scan instrument controller equally.
Compared to Fig. 4 and driving method shown in Figure 5, this driving method changes the output signal time point by the period of change that changes clock signal PHi1-I, PHi1-II, Phi2-I and Phi2-II, can not reduce the output pixel, thereby obtain higher image resolution.
See also Figure 10 and Figure 11, the another driving method of synthetic module of signal of video signal of the present invention and the photo-sensitive cell that method adopted comprises: carry the first photo-sensitive cell drive signal 41 " to first photo-sensitive cell 11 and carry the second photo-sensitive cell drive signal 43 " to second photo-sensitive cell 13, make its output image signal OS-I and OS-II respectively, as shown in FIG., at T0-T5 in the cycle, the first photo-sensitive cell drive signal 41 " drive whole pixel signals that 11 outputs of first photo-sensitive cell are obtained; at this moment, the second photo-sensitive cell drive signal 43 " clock signal PHi1-II and Phi2-II keep current potential constant; Then, at T5-T10 in the cycle, the second photo-sensitive cell drive signal 43 " drive whole pixel signals that 13 outputs of second photo-sensitive cell are obtained, at this moment, the first photo-sensitive cell drive signal 42 " clock signal PHi1-I and Phi2-I keep current potential constant.For diagram for simplicity, only show among Figure 10 and Figure 11 that photo-sensitive cell respectively exports 5 pixels.
Signal of video signal OS-I that first photo-sensitive cell 11 and second photo-sensitive cell 13 are exported respectively and OS-II are synthetic through operational amplifier 32 or signal combined resistance 31, thus output image composite signal as shown in figure 12.Through analog-digital converter 33 conversions, deliver to 35 outputs of scanner controller at last again.This kind resultant image signal can be handled output by plain scan instrument controller equally, and can reduce issuable interference in the transmission.
Compared to Fig. 4 and driving method shown in Figure 5, this driving method can not reduce the output pixel, thereby obtains higher image resolution.
Above embodiment can adopt the TCD2905CF type charge coupled cell and the corresponding driving signal of Toshiba (TOSHIBA) and realize, adopts the image induction element of other model and drive signal should belong to the equivalence design.
The above for the person of ordinary skill of the art, can make other various corresponding changes and distortion according to technical scheme of the present invention and technical conceive, and all these changes and distortion all should belong to the protection range of claim of the present invention.
Claims (9)
1. a signal of video signal synthesizes module, comprise first photo-sensitive cell, second photo-sensitive cell, analog-digital converter and scanner controller, it is characterized in that: also comprise an analog adder, the output of described first photo-sensitive cell and second photo-sensitive cell is connected in parallel to the input of analog adder, the output of described analog adder is connected to the input of analog-digital converter, described analog-digital converter output is connected to the scanner controller, the signal of video signal of file to be scanned both sides obtains by first photo-sensitive cell and second photo-sensitive cell respectively, the scanner controller is connected with second photo-sensitive cell with first photo-sensitive cell respectively and controls the signal of video signal that first photo-sensitive cell and second photo-sensitive cell are obtained in different periods outputs, and the signal of video signal of being exported passes through analog adder then successively, analog-digital converter is sent to the scanner controller.
2. signal of video signal as claimed in claim 1 synthesizes module, it is characterized in that: first resistance of connecting between first photo-sensitive cell and analog adder, second resistance of connecting between second photo-sensitive cell and analog adder.
3. signal of video signal as claimed in claim 1 synthesizes module, it is characterized in that: described analog adder is an operational amplifier.
4. signal of video signal as claimed in claim 1 synthesizes module, it is characterized in that: described analog adder is the signal combined resistance.
5. signal of video signal synthetic method, comprise one first photo-sensitive cell, second photo-sensitive cell, an analog-digital converter and a scanner controller are provided, it is characterized in that, further comprising the steps of: as an analog adder to be provided, the output of described first photo-sensitive cell and second photo-sensitive cell to be connected in parallel to the input of analog adder; The output of described analog adder is connected to the input of analog-digital converter; Described analog-digital converter output is connected to the scanner controller; And carry the first photo-sensitive cell drive signal and second photo-sensitive cell drive signal to the first photo-sensitive cell and second photo-sensitive cell respectively by the scanner controller, the described first photo-sensitive cell drive signal and the second photo-sensitive cell drive signal include clock signal, and the signal of video signal that two photosensory assemblies is obtained by the cooperation between the clock signal of two photo-sensitive cells in different periods outputs, and be sent to the scanner controller through analog adder, analog-digital converter successively.
6. signal of video signal synthetic method as claimed in claim 5, it is characterized in that: the first photo-sensitive cell drive signal and the second photo-sensitive cell drive signal include first clock signal and second clock signal, the period of change of first clock signal of first clock signal of the first photo-sensitive cell drive signal and the second photo-sensitive cell drive signal differs a transmission cycle, and the period of change of the second clock signal of the second clock signal of the first photo-sensitive cell drive signal and the second photo-sensitive cell drive signal differs a transmission cycle.
7. signal of video signal synthetic method as claimed in claim 5, it is characterized in that: the first photo-sensitive cell drive signal and the second photo-sensitive cell drive signal include clock signal, when whole pixel signal that the output of first photo-sensitive cell is obtained, the clock signal of the second photo-sensitive cell drive signal keeps current potential constant; Then, when whole pixel signal that the output of second photo-sensitive cell is obtained, the clock signal of the first photo-sensitive cell drive signal keeps current potential constant.
8. signal of video signal synthetic method, comprise one first photo-sensitive cell, second photo-sensitive cell, an analog-digital converter and a scanner controller are provided, it is characterized in that, further comprising the steps of: as an analog adder to be provided, the output of described first photo-sensitive cell and second photo-sensitive cell to be connected in parallel to the input of analog adder; The output of described analog adder is connected to the input of analog-digital converter; Described analog-digital converter output is connected to the scanner controller; And carry the first photo-sensitive cell drive signal and second photo-sensitive cell drive signal to the first photo-sensitive cell and second photo-sensitive cell respectively by the scanner controller, the described first photo-sensitive cell drive signal and the second photo-sensitive cell drive signal include clock signal and reset signal, the pixel signal that the output of the first photo-sensitive cell drive, first photo-sensitive cell is obtained, the reset signal of the first photo-sensitive cell drive signal are removed the pixel signal of first photo-sensitive cell in specific period output; The pixel signal that the output of the second photo-sensitive cell drive, second photo-sensitive cell is obtained, the reset signal of the second photo-sensitive cell drive signal is removed the pixel signal of second photo-sensitive cell in specific period output, and the pixel signal that first photo-sensitive cell and second photo-sensitive cell are exported is sent to the scanner controller through analog adder, analog-digital converter successively.
9. signal of video signal synthetic method as claimed in claim 8, it is characterized in that: adopt the reset signal of the first photo-sensitive cell drive signal to remove the pixel signal of first photo-sensitive cell, adopt the reset signal of the second photo-sensitive cell drive signal to remove the pixel signal of second photo-sensitive cell in the output of odd cycle period in the output of even cycle period.
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| CNB2004100984990A CN100397860C (en) | 2004-12-13 | 2004-12-13 | Image signal compounding module and method |
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| CNB2004100984990A CN100397860C (en) | 2004-12-13 | 2004-12-13 | Image signal compounding module and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US10477060B2 (en) | 2016-08-26 | 2019-11-12 | Zhuhai Pantum Electronics Co., Ltd. | Scanning device, image-forming apparatus, and scanning method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110233948A (en) * | 2019-07-15 | 2019-09-13 | 珠海奔图电子有限公司 | Scanning device, image forming apparatus, scan method and storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5280545A (en) * | 1988-12-29 | 1994-01-18 | Canon Kabushiki Kaisha | Image information processing apparatus capable of synthesizing front- and back-surface information |
| JPH11341239A (en) * | 1998-05-22 | 1999-12-10 | Canon Inc | Device and method for picture reading and storage medium |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5280545A (en) * | 1988-12-29 | 1994-01-18 | Canon Kabushiki Kaisha | Image information processing apparatus capable of synthesizing front- and back-surface information |
| JPH11341239A (en) * | 1998-05-22 | 1999-12-10 | Canon Inc | Device and method for picture reading and storage medium |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10477060B2 (en) | 2016-08-26 | 2019-11-12 | Zhuhai Pantum Electronics Co., Ltd. | Scanning device, image-forming apparatus, and scanning method |
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