CN1816093A

CN1816093A - Double-side scanning device

Info

Publication number: CN1816093A
Application number: CN 200510023806
Authority: CN
Inventors: 陈信禄
Original assignee: Hongguang Precision Industry Suzhou Co Ltd
Current assignee: Hongguang Precision Industry Suzhou Co Ltd
Priority date: 2005-02-03
Filing date: 2005-02-03
Publication date: 2006-08-09
Anticipated expiration: 2025-02-03
Also published as: CN100496081C

Abstract

The double face scanner can scan first face and second face of file to be scanned. The double face scanner includes IC for special application, first electric coupling module, second electric coupling module, first analog front end, and second analog front end. The said IC outputs a time sequence. Based on time sequence, the first electric coupling module senses first face of file to be scanned, and outputs first image data; the second electric coupling module senses second face of file to be scanned, and outputs second image data. The first analog front end converts first image data to first digital data, and outputs the digital data to the IC; and the second analog front end converts second image data to second digital data, and outputs the digital data to the IC. Corresponding to the time sequence, fixed data quantity is summation of first data quantity of first digital data and second data quantity of second digital data.

Description

Double-faced scanning device

Technical field

The present invention relates to a kind of two-sided (Duplex) scanning means, and be particularly related to and a kind ofly only use an Application Specific Integrated Circuit (Application Specific Integrated Circuit ASIC) handles the double-faced scanning device of the data volume of the duplex scanning image that produces at one time.

Background technology

Fig. 1 is the part-structure block diagram of known Double face scanner.Please refer to Fig. 1, Double face scanner 100 comprises first and second Application Specific Integrated Circuit (ASIC) 110 and 120, first and second AFE (analog front end) (Analog Front End, AFE) 112 and 122, and first and second electric coupling assembly (ChargeCoupled Device, CCD) 114 and 124.CCD 114 and CCD 124 are sequential (Timing) T1 that sends according to ASIC 110 and ASIC 120 respectively and the desired scan-data of T2 count sensing file to be scanned (not being shown among the figure) one side and the one side of (Face Down) down of (Face Up) up, and with the analog image data Di1 and the Di2 that are captured, after being converted to digital image signal Sd1 and Sd2 via AFE 112 and AFE 122 respectively, deliver to ASIC 110 again and ASIC 120 carries out data processing.

For example ASIC 110 and ASIC 120 send sequential T1 and the T2 of 1200dpi respectively.So CCD 114 and CCD 124 capture file to be scanned one side up and one side down each image data Di1 and Di2 respectively at 1200 according to sequential T1 and T2.Because the scanning double-side image need utilize two ASIC to handle two CCD picked image data respectively, and then reach computer generation image file.Therefore, the cost of required cost is higher.

Summary of the invention

In view of this, purpose of the present invention just provides a kind of double-faced scanning device, utilizes an ASIC to handle the data volume of the two-sided image of generation at one time, effectively to reduce production costs.

According to purpose of the present invention, a kind of double-faced scanning device is proposed, this device is summarized as follows: double-faced scanning device is to be used for scanning simultaneously first and second of file to be scanned.Double-faced scanning device comprises ASIC, a CCD, CCD, an AFE and AFE.ASIC is used for exporting a sequential.The one CCD is used for according to this sequential sensing file to be scanned first, and exports first image data.The 2nd CCD is used for according to this sequential sensing file to be scanned second, and exports second image data.The one AFE is used for first image data is converted to first numerical data, and exports ASIC to and handled.The 2nd AFE is used for second image data is converted to second numerical data, and exports ASIC to and handled.The fixed data amount of corresponding sequential is the summation of second data volume of first data volume of first numerical data and second image data.Therefore, utilize single ASIC can handle the image data of two CCD simultaneously, effectively reduce cost.

Description of drawings

Fig. 1 is the part-structure block diagram of known Double face scanner;

Fig. 2 illustrates the part-structure block diagram according to a kind of double-faced scanning device of a preferred embodiment of the present invention;

Fig. 3 illustrates the time diagram that an ASCI handles two CCD acquisition datas;

Fig. 4 illustrates sequential that the ASIC according to preferred embodiment of the present invention sends and the contrast figure of AFE return path signal Sd1 and Sd2.

Embodiment

For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below:

Please refer to Fig. 2, it illustrates the part-structure block diagram according to a kind of double-faced scanning device of a preferred embodiment of the present invention.Double-faced scanning device 200 comprises Application Specific Integrated Circuit (ASIC) 210, first and second AFE (analog front end) (AFE) 212 and 214 and first and second electric coupling assembly (CCD) 216 and 218.CCD216 and CCD 218 are count sensing file to be scanned (not being shown among the figure) one side up and one sides down of the desired scan-data of sequential (Timing) T sent according to ASIC 210 respectively, and with the analog image data Di1 and the Di2 that are captured, after being converted to digital image signal Sd1 and Sd2 via AFE 212 and AFE 214 respectively, sending ASIC 210 again back to and carry out data processing.

The place that the present invention is different with known technology is, handles two CCD 216 and 218 picked image data by an ASIC 210.As shown in Figure 3, be example with scanning double-side 600dpi, utilize ASIC210 to handle the principle of 1200dpi data, the sequential T that sends 1200dpi gives CCD 216 and 218.Utilize the time of handling 1200dpi data equal length to handle each 600dpi data that a CCD 216 and the 2nd CCD 218 are captured respectively again with ASIC 210.

As mentioned above, why double-faced scanning device 200 can utilize an ASIC210 to handle the image data Di1 and the Di2 of two CCD 216 and 218 outputs in the embodiment of the invention, and its key is that an AFE 212 and the 2nd AFE 214 have respectively comprised output enable port (Output Enable Port) OE1 and OE2.OE1 and OE2 accept the control of ASIC 210 respectively.ASIC 210 utilizes the sequential T that is sent not only to inform CCD 216 and 218 number of data points of answering pick-up image data Di1 and Di2, also control simultaneously the OE1 and the OE2 of AFE 212 and 214, make when image data Di1 and Di2 convert digital signal Sd1 and Sd2 to that the odd point data of the word signal Sd1 that only peeks and the even number point data of digital signal Sd2 send back to ASIC 210.For example sequential T is 1200dpi, and CCD 216 and 218 has captured data Di1 and Di2 respectively at 1200, after the house point through OE1 and OE2, only stays each numerical data of 600 to send ASIC 210 back in signal Sd1 and Sd2 again.

Certainly, it is above-mentioned after OE1 and OE2 house point produces the numerical data Da1 of each 600dpi among signal Sd1 and the Sd2 and Da2 and inputs to ASIC 210, can be that the mode that replaces in the cycle is carried out the processing of two kinds of data with the fixed qty point respectively, be Da1, Da2, Da1, Da2 ..., or Da 1, Da1, Da2, Da2, Da1, Da1, Da2, Da2 ...Or handle earlier the data Da1 of 600dpi, handle the data Da2 of 600dpi again, promptly Da1, Da1 ..., Da2, Da2.Or handle earlier the data Da2 of 600dpi, handle the data Da1 of 600dpi again, promptly Da2, Da2 ... Da1, Da1.

In addition, ASIC 210 also can send the data point that sequential T informs CCD 216 and the required 1200dpi of 218 acquisitions, and directly is that some back output respectively is image data Di1 and the Di2 of 600dpi with 2 merging (Merge) on CCD 216 and 218.Digital signal Sd1 and Sd2 that the image data Di1 of 600dpi and Di2 are converted to 600dpi via AFE212 and 214 respectively again send ASIC 210 back to.Therefore, can only use an ASIC to handle two-sided image data amount equally, reach the purpose that reduces cost.

Please refer to Fig. 4, it illustrates the sequential T that the ASIC according to preferred embodiment of the present invention sends and the signal Sd1 and the Sd2 contrast figure of AFE passback.As shown in Figure 4, the sequential T that ASIC sends requires CCD 216 and 218 that the data Da of fixed number (for example being 1200dpi) is provided.And signal Sd1 that AFE 212 and 214 returns respectively and Sd2 comprise the clock signal To1 and the To2 of numerical data Da1 and Da2 and OE1 and OE2 control.Utilize the high low level output of clock signal To1 and To2, when high levels H, do not send numerical data Da1 or Da2, when low level L, then send numerical data Da1 or Da2.So ASIC 210 desired data Da are then alternately provided by numerical data Da1 and Da2 respectively as shown in Figure 4.The cycle of clock signal To1 and To2 among the figure it should be noted that is when being six times of T, and AFE 212 and 214 is six data points of 6 houses in every interval respectively.At last, the data Da that receives of ASIC 210 is that six point data Da1 (comprising redness, blueness, each 2 point of green picture element) and six point data Da2 (comprising redness, blueness, each 2 point of green picture element) alternately arrange.

In addition, when 200 of double-faced scanning devices carry out single-sweep, just do not utilize OE1 or OE2 control to give up point operation.Just, ASIC 210 sends the sequential T of 1200dpi, and data Di1 or the Di2 of CCD 216 or 218 acquisition 1200dpi still are numerical data Da1 or the Da2 of 1200dpi via AFE 212 or 214 conversions, send ASIC 210 again back to.

The advantage of the disclosed double-faced scanning device of the above embodiment of the present invention is to utilize an ASIC to handle two-sided image data, give up point operation or directly on CCD, carry out also point operation by the control of the OE on the AFE, an ASIC can handle the data volume of the two-sided image of same time generation, can reduce mainboard materials cost at least 20%, improve the economic benefit of producing.

In sum; though the present invention discloses as above with a preferred embodiment; yet it is not to be used for limiting the present invention; any those of ordinary skill in the art; without departing from the spirit and scope of the present invention; also can be used for a variety of modifications and variations, thus protection scope of the present invention should with claim scope was defined is as the criterion.

The drawing reference numeral explanation

100,200: 110: the ASIC of double-faced scanning device

112,212: the AFE 114,216: the CCD

120: the two ASIC 122,214: the two AFE

124,218: the two CCD 210:ASIC

Claims

1. double-faced scanning device scans first and second an of file to be scanned simultaneously, and described double-faced scanning device comprises:

One Application Specific Integrated Circuit, output timing;

One first electric coupling assembly according to first of the described file to be scanned of described sequential sensing, and is exported several first image datas;

One second electric coupling assembly according to second of the described file to be scanned of described sequential sensing, and is exported several second image datas;

One first AFE (analog front end) is converted to several first numerical datas with described these first image datas, and exports described Application Specific Integrated Circuit to and handled;

One second AFE (analog front end) is converted to several second numerical datas with described these second image datas, and exports described Application Specific Integrated Circuit to and handled;

Wherein, the fixed data amount of corresponding described sequential is the summation of second data volume of first data volume of described these first numerical datas and described these second image datas.

2. double-faced scanning device as claimed in claim 1, it is characterized in that described first electric coupling assembly and the described second electric coupling assembly capture and export described these first image datas and described these second image datas of described fixed data amount respectively according to described sequential.

3. double-faced scanning device as claimed in claim 2, it is characterized in that, described first AFE (analog front end) and second AFE (analog front end) comprise the first output enable port and the second output enable port respectively, accept the control of described Application Specific Integrated Circuit, described these first image datas and described these second image datas are given up point operation.

4. double-faced scanning device as claimed in claim 3, it is characterized in that, described house point operation be by the described first output enable port and the described second output enable port respectively with every described these first image datas of fixedly counting and described these second image datas, give up described described these first image datas of fixedly counting and described these second image datas.

5. double-faced scanning device as claimed in claim 4, it is characterized in that, described first output enable port and the described second output enable port are exported one first clock signal and one second clock signal respectively carrying out described house point operation, and described first clock signal and described second clock signal are not high levle output or low level output simultaneously.

6. double-faced scanning device as claimed in claim 5, it is characterized in that, corresponding described high levle output and described low level are exported one of them described these first image datas and described these second image datas and are given up, and wherein another these first image datas and these second image datas are converted to described these first numerical datas and described these second numerical datas respectively.

7. double-faced scanning device as claimed in claim 1, it is characterized in that described first electric coupling assembly and the described second electric coupling assembly capture the data of described fixed data amount according to described sequential and carry out 2 also point operations of merging into any and produce described these first image datas and described these second image datas.

8. double-faced scanning device as claimed in claim 1 is characterized in that, described Application Specific Integrated Circuit is alternately carried out data processing to described these first numerical datas and described these second numerical datas.

9. double-faced scanning device as claimed in claim 1, it is characterized in that, described Application Specific Integrated Circuit is carried out data processing to another after earlier described these first numerical datas and described one of them advanced line data of these second numerical datas being handled again.

10. double-faced scanning device as claimed in claim 1 is characterized in that, described first data volume equals described second data volume.

11. double-faced scanning device as claimed in claim 1, it is characterized in that, when double-faced scanning device carried out single-sweep to described file to be scanned, the described fixed data amount of corresponding described sequential was first data volume of described these first numerical datas or second data volume of described these second numerical datas.