CN101248658B - Image reading apparatus - Google Patents
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- CN101248658B CN101248658B CN2006800258163A CN200680025816A CN101248658B CN 101248658 B CN101248658 B CN 101248658B CN 2006800258163 A CN2006800258163 A CN 2006800258163A CN 200680025816 A CN200680025816 A CN 200680025816A CN 101248658 B CN101248658 B CN 101248658B
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Abstract
An image reading apparatus is provided that can prevent image streaks due to dirt, stain or the like from being produced in an image of an original that is read while being conveyed. The image reading apparatus (A) includes an ADF (40) having a scanner unit (59) incorporated therein and comprised of a cylinder (60) having an outer peripheral surface thereof on which a plurality of read pixels (61) are arranged in a matrix. In reading an original (D), the scanner unit is rotatably driven in an original conveying direction at a circumferential speed approximately equal to an original conveying speed, and reads image information on the original passing through an image reading position (P1).
Description
Invention field
The present invention relates to read the image read-out of the image on the original copy that is transmitted.
Background technology
Traditionally, image read-out is located in photocopier etc.In some image read-outs, can when transmitting, sub scanning direction utilize the scanning element that stops at the precalculated position to read from the original copy of automatic document feeder unit supply.The image read-out that can read the original copy two sides also is known (the open No.2003-008836 of reference example such as Japan Patent)
With reference to Figure 32, a kind of like this imaging device will be described, this imaging device is equipped with the image read-out that can read the original copy two sides.Figure 32 is the longitudinal sectional view of structure that expression has the imaging device of traditional images reading device.
Shown in figure 32, imaging device comprises the image read-out A of the image information that is used to read on the original copy and the image information that is used for reading based on this image read-out A forms the printing equipment B of image on paper.
Image read-out A is made up of automatic document feeder unit (hereinafter referred to as ADF) and scanning means 1.ADF2 comprises original copy pallet 12, pick-up roller 43, pair of separated roller 44a, 44b, a plurality of transfer roller 46,48, distributing roller 49 and discharges pallet 50.Original copy D is deposited on the original copy pallet 12.The original copy D that is deposited on the original copy pallet 12 more than Di is separated 44a, 44b with separate roller via pick-up roller 43, is transported to transfer path 156 then.Every original copy D utilizes transfer roller 46 to transmit along transfer path 156, and the imagery exploitation scanning means 1 on this original copy D reads.After image read, original copy was expelled to via transfer roller 48 and distributing roller 49 and discharges pallet 50.
For the two-sided original copy D that reads, provide counter-rotating baffle plate 152 in the position in transfer roller 48 downstreams.In addition, be provided for the reversing counter-rotating transfer path 153 on surface of the scan manuscript D of institute.
Scanning means 1 has pressuring plate glass 22 and is located at scanning element 21 below this pressuring plate glass 22.Scanning element 21 be configured to can be when utilizing guide rail 24 guiding in Figure 32 the direction (sub scanning direction) shown in the arrow F move.Scanning element 21 is equipped with a plurality of be used to shine the lamp 21c of original copy, the optical system 21f of line array CCD (charge) 21g, the guiding utilization lamp 21c irradiation light that original copy reflected.
It is original copy streaming scanning pattern and fixing Manuscript scanner pattern that image read-out A has two kinds of scan patterns, and can these scan patterns any read original copy.
Original copy streaming scanning pattern is a kind ofly utilizing scanning element 21 to read the pattern of this original copy in the original copy that ADF2 sends to transmitting along sub scanning direction.Concrete, send original copy D to from ADF2, and transmit this original copy D along sub scanning direction.At this moment, make scanning element 21 stop at the mobile position 101 of reading.When the original copy D that transmits along sub scanning direction with when streaming scanning glass 102 closely contacts when via flow reads position 101, scanning element 21 reads this original copy D along main scanning direction.As a result, read the complete one side of original copy D.Then, original copy is expelled to via transfer roller 48 and distributing roller 49 and discharges pallet 50.In this manner, read the one side of original copy D.
When under original copy streaming scanning pattern, selecting the duplex scanning pattern, after reading first of original copy D, utilize distributing roller 49 pull out this original copy D until its rear end by counter-rotating baffle plate 152.Switch counter-rotating baffle plate 152 and reverse drive distributing roller 49.As a result, original copy D is introduced transfer path 153 and the surface of the original copy that will scan is inverted.Utilize transfer roller 46 read position 101 towards flowing once more and transmit original copy D, and utilize scanning element 21 to read second of this original copy D.In this manner, read the two sides of original copy D.
On the other hand, under fixing Manuscript scanner pattern, original copy D is placed on the precalculated position on the pressuring plate glass 22, and scanning element 21 moves with respect to the original copy D that is placed along sub scanning direction.Concrete, scanning element 21 moves with respect to the original copy D that is placed on the pressuring plate glass 22 along sub scanning direction, reads this original copy D along main scanning direction simultaneously, thereby reads whole original copy.
Printing equipment B comprises laser cell 3.The view data that laser cell 3 reads based on image read-out A (vision signal) modulated laser, and with this laser radiation on photosensitive drums 10.As a result, on photosensitive drums 10, form electrostatic latent image.The electrostatic latent image that is formed on the photosensitive drums 10 is visualized as toner image via the toner of supplying with from developing cell 11.This toner image utilizes transfer printing unit 6 to be transferred to from giving on the paper P that carton 4 sends to via register roller 5.The paper P that toner image has been transferred on it is transported to fixation facility 7.This fixation facility 7 is given paper P heating and pressurization, thus toner image on this paper P.Toner image photographic fixing paper P thereon is expelled to discharge pallet 9 via distributing roller 8.
Yet in the original copy streaming scanning, when streaming scanning glass 102 had stain, this stain can produce the image striped that extends along sub scanning direction in the image information that is read.For example, original copy is sometimes by pollutions such as ball ink, opaquing fluid, glue.Be attached to streaming scanning in the process when on glass when this stain reads at original copy, in the image information that reads subsequently, just produce the image striped.Unless the stain on the streaming scanning glass 102 is removed, otherwise these image stripeds can not eliminate, and make to obtain high-quality image.
Recently, a kind of like this image read-out comes into operation, in this image read-out, two image-reading devices are located on the both sides of original copy transfer path, and utilize this two image-reading device to read image on the original copy two sides that the original copy transfer path that extends between this two equipment transmits simultaneously.
With reference to Figure 33 above image read-out is described.Figure 33 is the longitudinal sectional view that expression can be read the traditional images reading device of the image on the original copy two sides simultaneously.
As shown in figure 33, image read-out comprises two scanning elements 121,160.Scanning element 121,160 be located at flow read position 101 with mutually in the face of and transfer path 161 mediate.Each scanning element 121,160 is identical in textural all scanning elements 21 with aforementioned imaging device.
In this image read-out, original copy D many is delivered to flow from original copy pallet 12 and reads position 101.When every original copy D when via flow reads position 101, utilize scanning element 121 to read first the image of this original copy D, utilize scanning element 160 to read second the image of this original copy D simultaneously.Subsequently, original copy D is expelled to via transfer roller 49 and discharges pallet 50.
Have the two sides that the image read-out of structure shown in Figure 33 can read original copy at short notice, high production rate is provided.Yet, the same with structure shown in Figure 32, when scanning element 121 or 160 on the face of original copy, have stain the time, this stain can produce the image striped that extends along sub scanning direction in the image information that is read.It should be noted,, when scanning element 160 is not accurately located with respect to scanning element 121, skew can occur between the scan image of first and second face of original copy D, cause the defective of figure anamorphosis for structure shown in Figure 33.Especially, in scanning element 121 is located at scanning means 1 and scanning element 160 be located under the situation in the ADF2 that can open and close with respect to this scanning means 1, must provide adjustment equipment to adjust the relative position of this scanning element 121,160.
Summary of the invention
The object of the invention provides and produces in a kind of image that prevents this original copy of reading when transmitting original copy because the image read-out of the image striped that dust, stain etc. cause.
For realizing this purpose, the invention provides a kind of image read-out, comprising: rotating part, a plurality of optical pickocffs are located on the outer peripheral face of described rotating part, and this rotating part is along the direction extension vertical with the direction of transfer of original copy and be configured as cylindrical shape; And driving arrangement, be used to make described rotating part to rotate, wherein: when utilizing described driving arrangement to rotate described rotating part, read the image of the original copy that transmits along the described outer peripheral face of described rotating part by described a plurality of optical pickocffs; Described image read-out also comprises the original copy transfer equipment that is used to transmit described original copy, and described original copy transfer equipment transmits described original copy along the described outer peripheral face of described rotating part; Described driving arrangement makes described rotating part to rotate with the approximately equalised circumferential speed of the transfer rate of the described original copy that is transmitted by described original copy transfer equipment.
According to image read-out of the present invention, can prevent to produce in the image of this original copy of when transmitting original copy, reading because the image striped that dust, stain etc. cause.
From below in conjunction with the description of the drawings, above and other feature and advantage of the present invention will be apparent, and wherein same reference numeral is all represented same names or like in all figure.
Description of drawings
Fig. 1 is that expression is equipped with the longitudinal sectional view according to the structure of the imaging device of the image read-out of first embodiment of the invention;
Fig. 2 A is the longitudinal sectional view of the structure of parts on every side that schematically shows scanning element shown in Figure 1;
Fig. 2 B is the longitudinal sectional view of excision portion of the barrel surface of expression scanning element shown in Figure 1;
Fig. 3 A is the perspective view of structure of the major part of expression scanning element shown in Figure 1;
Fig. 3 B is the longitudinal sectional view of scanning element shown in Figure 2;
Fig. 4 A a plurality of read pixels that to be expression form by organic semiconductor are with the expanded view of the state of cells arranged in matrix;
Fig. 4 B is the diagrammatic sketch of the circuit structure of expression read pixel;
Fig. 5 is the block diagram of the structure of image processing part shown in the presentation graphs 3A;
Fig. 6 is the longitudinal sectional view of expression according to the structure of the scanning element of the image read-out of second embodiment of the invention;
Fig. 7 is the expanded view that the read pixel in the expression scanning element shown in Figure 6 is arranged;
Fig. 8 is the expanded view that expression is arranged according to the read pixel in the scanning element of the image read-out of third embodiment of the invention;
Fig. 9 is the perspective view of expression according to the structure of the major part of the scanning element of the image read-out of third embodiment of the invention;
Figure 10 is that expression is equipped with the longitudinal sectional view according to the structure of the imaging device of the image read-out of fourth embodiment of the invention;
Figure 11 A is the longitudinal sectional view of the structure of parts on every side that schematically shows scanning element shown in Figure 10;
Figure 11 B is the longitudinal sectional view of excision portion of the strap-like member of expression scanning element shown in Figure 10;
Figure 12 A is the perspective view of structure of the major part of expression scanning element shown in Figure 10;
Figure 12 B is the longitudinal sectional view of the roller of expression scanning element shown in Figure 11;
Figure 13 is the vertical view at the junction surface of the end of strap-like member shown in the part excision ground presentation graphs 12A;
Figure 14 is the longitudinal sectional view at the junction surface of the end of strap-like member shown in the presentation graphs 12A;
Figure 15 is another routine longitudinal sectional view of the structure at the junction surface of the end of strap-like member shown in the presentation graphs 12A;
Figure 16 is the longitudinal sectional view of expression according to the junction surface of the strap-like member in the image read-out of fifth embodiment of the invention;
Figure 17 is the longitudinal sectional view that schematically shows according to the structure of parts around the scanning element of the image read-out of sixth embodiment of the invention;
Figure 18 A is the end of expression scanning element and the perspective view of the joint construction between the image processing part;
Figure 18 B is the other end of expression scanning element and the perspective view of the joint construction between the image processing part;
Figure 19 is the diagrammatic sketch of the structure of expression array structure of a plurality of read pixels and peripheral circuit thereof;
Figure 20 be expression can with the diagrammatic sketch of the structure of the array structure of another a plurality of read pixels of replacing shown in Figure 19 and peripheral circuit thereof;
Figure 21 is that the expression read pixel is listed in the diagrammatic sketch that moves in scanning element and the opposed facing zone of standard;
Figure 22 is that the expression read pixel is listed in the diagrammatic sketch that moves in scanning element and the opposed facing zone of standard;
Figure 23 is that the expression read pixel is listed in the diagrammatic sketch that moves in scanning element and the opposed facing zone of standard;
Figure 24 is that the expression read pixel is listed in the mobile diagrammatic sketch in the roll gap portion between scanning element and the pressurization part;
Figure 25 is that the expression read pixel is listed in the mobile diagrammatic sketch in the roll gap portion between scanning element and the pressurization part;
Figure 26 is that the expression read pixel is listed in the mobile diagrammatic sketch in the roll gap portion between scanning element and the pressurization part;
Figure 27 is the circuit diagram of expression according to the structure of the read pixel of the image read-out of seventh embodiment of the invention;
Figure 28 is the longitudinal sectional view of expression according to the structure of the image read-out of eighth embodiment of the invention;
Figure 29 is the longitudinal sectional view of the structure of parts on every side that schematically shows scanning element shown in Figure 28;
Figure 30 is the perspective view of the joint construction between presentation video handling part and the scanning element shown in Figure 28;
Figure 31 be the expression can with the array structure of a plurality of read pixels of replacing shown in Fig. 4 A and the diagrammatic sketch of peripheral circuit thereof;
Figure 32 is the longitudinal sectional view of structure that expression has the imaging device of traditional images reading device; And
Figure 33 is the longitudinal sectional view of structure that expression can be read the traditional images reading device of the image on the original copy two sides simultaneously.
Embodiment
Below, the preferred embodiments of the present invention are described with reference to the accompanying drawings.
(first embodiment)
Fig. 1 is that expression is equipped with the longitudinal sectional view according to the structure of the imaging device of the image read-out of first embodiment of the invention.
As shown in Figure 1, imaging device comprises the image read-out A of the image information that is used to read on the original copy and the image information that is used for reading based on this image read-out A forms the printing equipment B of image on paper.
Image read-out A is made up of ADF40 and scanning means 20.ADF40 comprises that original copy D piles up original copy pallet 12 thereon and is used to detect the original detection sensor 45 whether any original copy D is arranged on this original copy pallet 12.The original copy D that is deposited on the original copy pallet 12 more than Di is separated with pair of separated roller 44a, 44b via pick-up roller 43, and every original copy is introduced into device A then.The original copy D that is introduced utilizes the transfer roller 46 as the original copy transfer equipment to transmit to the reading part 30 that is used to read the image information on this original copy D with predetermined transfer rate.Variations such as the scan pattern that transfer rate is set according to the user, read-out resolution.Near transfer roller 46, be provided with the document edge transducer 47 of the end that is used to detect original copy D.The detection signal of document edge transducer 47 is used for test example such as original copy blocks.
Reading part 30 comprises and forms scanning element 59 cylindraceous and the pressing means 23 that is suitable for contacting with the outer peripheral face of this scanning element 59.In image reading position, scanning element 59 utilizes the drive motor as driving arrangement to drive with the circumferential speed rotation that is approximately equal to the original copy transfer rate, so that the outer peripheral face of this scanning element 59 moves towards the direction identical with the direction of transfer of original copy D.Scanning element 59 reads the image information on the original copy D when rotating.Pressing means 23 is equipped with the standard 42 that is used to obtain shade correction data (shadow data).Pressing means 23 is configured to make its standard 42 towards scanning element 59.The details of scanning element 59 and pressing means 23 will illustrate below.
Original copy D through reading part 30 utilizes transfer roller 48 to transmit along transfer path 40a, utilizes distributing roller 51 to be discharged to then and discharges on the pallet 50.
ADF40 is designed to and can opens and closes with respect to scanning means 20.When ADF40 opens, can be placed on original copy on the pressuring plate glass 22 of scanning means 20.ADF40 provides white background board 52, and this white background board 52 is configured to when ADF40 is closed towards pressuring plate glass 22.Utilize this white background board 52, the original copy that is placed on the pressuring plate glass 22 is closely contacted with this pressuring plate glass 22.
Scanning means 20 comprises pressuring plate glass 22 and is located at scanning element 21 below this pressuring plate glass 22.Scanning element 21 is designed to and can moves along sub scanning direction when utilizing guide rail 24 guiding.Scanning element 21 is equipped with a plurality of lamp 21c, line array CCD 21g and handles that are used to shine original copy to utilize the lamp 21c irradiation light that original copy reflected to guide to the optical system 21f of line array CCD 21g.Optical system 21f comprises a plurality of speculums and condenser lens.
The two kinds of patterns that comprise image read-out A promptly adopt the ADF scan pattern of ADF40 and adopt the fixedly Manuscript scanner pattern of scanning element 21, and can read original copy under every kind of pattern.
Under the ADF scan pattern, the original copy that is piled up on the original copy pallet 12 utilizes ADF40 to carry.At this moment, scanning element 59 is rotated along the circumferential speed of original copy direction of transfer with the transfer rate that is approximately equal to original copy D.Original copy D is transferred between scanning element 59 and the pressing means 23, and the outer peripheral face along cylindrical element 60 transmits thus.At this moment, scanning element 59 reads the image information on the original copy D that is transmitted when rotating.The details of ADF scan pattern will be in explanation subsequently.
On the other hand, under fixing Manuscript scanner pattern, open ADF40, original copy D is placed on precalculated position on the pressuring plate glass 22.Then, scanning element 21 moves with respect to the original copy D that is placed on the pressuring plate glass along sub scanning direction.Concrete, scanning element 21 moves along sub scanning direction, reads original copy D on the pressuring plate glass 22 along main scanning direction simultaneously, thereby reads whole original copy.
Printing equipment B has and printing equipment B identical construction shown in Figure 33, therefore will omit the explanation to it.
Then, describe scanning element 59 in detail with reference to Fig. 2-4.Fig. 2 A be schematically show scanning element 59 shown in Figure 1 around the longitudinal sectional view of structure of parts, Fig. 2 B is the longitudinal sectional view of excision portion of the barrel surface of expression scanning element 59 shown in Figure 1.Fig. 3 A is the perspective view of structure of the major part of expression scanning element shown in Figure 1, and Fig. 3 B is the longitudinal sectional view of scanning element shown in Figure 2.Fig. 4 A is the expanded views of a plurality of read pixels of being made up of organic semiconductor of expression with the state of cells arranged in matrix, and Fig. 4 B is a diagrammatic sketch of representing the circuit structure of read pixel.
Shown in Fig. 2 A, scanning element 59 comprises as rotating part and along the cylindrical element 60 that extends with the perpendicular direction (main scanning direction) of the direction of transfer of original copy D.Cylindrical element 60 is made by transmitting substrate (comprising transparent base).The elongated lamp 41 that extends with the axis coaxle of this cylindrical element 60 is installed in the cylindrical element 60.Shown in Fig. 3 B, the opposed end of cylindrical element 60 opens wide, and supporting member 41a is installed on the open end of this cylindrical element 60.Supporting member 41a supports lamp 41.In addition, supporting member 41a is installed on the main body of ADF40, and rotatably support utilizes the cylindrical element 60 of the actuating force rotation of drive motor 771 generations.
Shown in Fig. 2 A, utilize drive motor 771 towards the direction of transfer of original copy D with the approximately equalised circumferential speed of transfer rate of this original copy D driven sweep unit 59 rotationally.Utilize the pressing means 23 of spring part 23a pushing, cause standard 42 to contact with the outer peripheral face of this scanning element 59 with predetermined pressure towards scanning element 59.Every original copy D is through between scanning element 59 and the standard 42, and the image information on the original copy D is scanned unit 59 at image reading position P1 and reads.
As after will describe, have on the outer peripheral face of cylindrical element 60 and be arranged to rectangular a plurality of read pixels 61.In a plurality of read pixels 61, those read pixels 61 cooperations of being arranged to row along the axis of cylindrical element 60 are formed for limiting the read pixel row 68 of a respective column of rectangular array.Read pixel row 68 are along the circumferencial direction setting of cylindrical element 60, thus the qualification row matrix.
More specifically, as shown in Figure 3A, a plurality of read pixel row 68 along the circumferencial direction of cylindrical element 60 with on the predetermined outer peripheral face that is disposed on this cylindrical element 60.Shown in Fig. 2 B, each read pixel row 68 comprises a plurality of read pixels that axially are spaced apart of each other at a certain distance setting 61 along cylindrical element 60.On the back side of each read pixel 61, provide and be used to prevent that the light of lamp 41 from directly injecting the photomask 62 of this read pixel 61.On the outer peripheral face of cylindrical element 60, be formed with the protective layer 80 that is used to protect read pixel 61.
Under the expansion form, the arranged that the read pixel 61 on cylindrical element 60 outer peripheral faces forms shown in Fig. 4 A.Those read pixels 61 (forming those read pixels 61 of read pixel row 68) of being arranged to row along the direction of rectangular array are connected with word line 63, and this word line 63 is connected with row decoding line 67 via corresponding wordline selector 70 again.On the other hand, those read pixels 61 of being arranged to row along the direction of row matrix are connected with bit line 64, and this bit line 64 is connected with row decoding line 69 via corresponding bit line selector 71 again.According to controlling each wordline selector 70 from wordline selector control line 92 signal supplied.According to controlling each bit line selector 71 from bit line selector control line 91 signal supplied.By control wordline selector 70 and bit line selector 71, the address of specify columns decoding line 67 and row decoding line 69, thus can read the current value of expection read pixel 61.
Shown in Fig. 4 B, each read pixel 61 is included in and is subjected to the light time to produce the organic photoelectric diode 61a and the organic transistor 61b of the current value that changes according to light income.Utilize the switching manipulation of organic transistor 61b, read the current value that produces in the organic photoelectric diode 61a.Read pixel 61 with described structure just now is as optical pickocff.Organic photoelectric diode 61a and organic transistor 61b are made by organic semiconductor.
The read pixel of being made by organic semiconductor 61 makes and can utilize accurate printing technologies etc. to form a plurality of read pixels 61 and their peripheral circuit on the outer peripheral face of cylindrical element 60.
As shown in Figure 3A, be formed with a plurality of annular terminal 83a, 83b, 83c and 65 on scanning element 59 end face.Terminal 83a is connected with row decoding line 69, and terminal 65 is connected with row decoding line 67, and terminal 83b is connected with bit line selector control line 91, and terminal 83c is connected with wordline selector control line 92.
With reference to Fig. 5, will describe image handling part 58 in detail.Fig. 5 is the block diagram of the structure of image processing part 58 shown in the presentation graphs 3A.
As shown in Figure 5, image processing part 58 comprises analogue signal processor 72.72 pairs of signals of telecommunication that read from scanning element 59 of analogue signal processor carry out the various corrections such as sensitivity correction one class.Each signal of revising through analogue signal processor 72 utilizes A/D converter 73 to be converted to data image signal.Utilize gain controller 74, shade corrector 75 and 76 pairs of data image signals of hue controller to carry out various corrections.Then, the data image signal through revising temporarily is kept in the data buffer 77 as view data, and sends to printing equipment B.Shade corrector 75 is carried out the shade correction based on the shadow data that reads from the same read pixel of utilizing of standard 42 pair and each read pixel 61 relevant view data.
In addition, image processing part 58 sends to this scanning element 59 to a kind of like this signal, and the read pixel 61 that this signal is used to control from scanning element 59 reads the signal of telecommunication.Yet, omitted expression here to this functional block.
Then, will the ADF scan pattern of image read-out A be described.
When sending by manipulation operations portion etc. when reading the instruction of original copy with the ADF scan pattern, at first obtaining shadow data, drive motor 771 make scanning element 59 along the original copy direction of transfer to rotate with the approximately equalised circumferential speed of the transfer rate of original copy D.Then, scanning element 59 reads standard 42.
When reading standard 42, the read pixel row 68 that arrived image reading position P1 receive from the light of these standard 42 reflections, and generate the current value that changes according to light income.The organic transistor 61b of the read pixel 61 of switch read pixel row 68 in turn, the current value that generates in the organic photoelectric diode 61a of this read pixel 61 is read via relevant word line 63 as the signal of telecommunication.The signal of telecommunication of being read is converted into the shadow data sheet that is used for carrying out the shade correction in image processing part 58.Each shadow data is stored in the memory (not shown) together with the address date of corresponding read pixel 61.
In this manner, when read pixel row 68 have arrived image reading position P1, obtain the shadow data sheet that is used for corresponding read pixel 61, and this shadow data sheet is stored in the memory with address information.Therefore, when scanning element 59 is rotated a week, just obtained to be used for the shadow data sheet of all read pixels 61 of scanning element 59.
After obtaining to be used for the shadow data of all read pixels 61, ADF40 begins to carry the original copy D on the original copy pallet 12.Every the original copy D that is carried is admitted between scanning element 59 and the pressing means 23.At this moment, make scanning element 59 along the original copy direction of transfer to rotate with the approximately equalised circumferential speed of the transfer rate of original copy D.Then, scanning element 59 reads through the image information on the original copy D of image reading position P1.
When reading original copy D, the read pixel row 68 that arrived image reading position P1 receive from the light of this original copy D reflection, and produce the current value that changes according to light income.Thus, generate the current value that changes according to the image information on the original copy D.By the read pixel 61 of switch read pixel row 68, the current value that generates in these read pixels 61 is read via associated word lines 63 as the signal of telecommunication.
The signal of telecommunication that is read is transfused to image processing part 58.The signal of telecommunication of 58 pairs of inputs of image processing part is carried out the various processing that comprise shade correction etc., thereby generates the view data sheet that will send to printing equipment B subsequently.
Under aforementioned ADF scan pattern, rotate driven sweep unit 59 like this, make its circumferential speed be approximately equal to the transfer rate of original copy D.Thus, when when sub scanning direction is seen, read pixel 61 moves with respect to the original copy D that is transmitted hardly.As a result, even on the surfaces attached to original copy D, scanning element 59 or pressing means 23 (standard 42) such as dust, stain, the reading images of this dust or stain is not extended along sub scanning direction yet.Therefore, unlike the prior art, do not generate because the image striped that dust or stain cause makes to obtain high quality graphic.
(second embodiment)
Then, with reference to the Fig. 6 and the 7 explanation second embodiment of the present invention.Fig. 6 is the longitudinal sectional view that schematically illustrates according to the structure of the major part of the scanning element of the image read-out of second embodiment.Fig. 7 is the expanded view that the read pixel in the expression scanning element shown in Figure 6 is arranged.
Among first embodiment, finish obtain to be used for the shadow data of all read pixels 61 after, carry out reading of original copy.Present embodiment is different from the first embodiment part and is obtaining of executed in parallel shadow data and reading of original copy.
As shown in Figure 6, in the present embodiment, standard 42 is not assembled in the pressing means 23, and is provided in a side of the another location.Standard 42 is pressed to the outer peripheral face of scanning element 59 with predetermined pressure.The position that scanning element 59 reads original copy D is called as image reading position P1 here, reads position P2 and the position of reading standard 42 is called as standard.
In the case, as shown in Figure 7, suppose to represent to read from read pixel row 68 to the standard that arrives image reading position P1 in the scanning element 59 with L1 the circumferential distance of position P2, then distance L 1 is set to and satisfies the relation shown in the following formula.
L1=(m+1/2) L2, m represents positive integer here.
L2 represents the circumferential distance between the adjacent read pixel row 68.
Like this, distance L 1 is set to the integral multiple that is not equal to the circumferential distance L2 between the adjacent read pixel row 68.As a result, when given read pixel row 68 arrived image reading position P1, any other read pixel row 68 all no show standard read position P2.In other words, the asynchronism(-nization) that given read pixel row 68 arrive image reading position P1 arrives the time that standard reads position P2 in any other read pixel row 68, and this makes can alternately carry out reading of original copy D and reading of standard 42.As a result, for each read pixel row 68, can carry out reading of this standard 42 and reading of original copy D according to order or the opposite order of standard 42 and original copy D.Compare with after finishing the shadow data that obtains to be used for all read pixels 61, carrying out first embodiment that original copy D reads, can shorten to and read the required time of original copy D.
In the present invention, can be after the image information that obtains from read pixel row 68 be finished the shade correction, eliminate relevant with the described just now read pixel row 68 of the finishing the shade correction shadow data that is stored in the memory immediately.Therefore, memory has enough memory capacity to be stored at standard read the shadow data of those read pixel row 68 between position P2 and the image reading position P1 and the shadow data that obtains in the processing time of shade correction process, makes to be reduced to the required memory capacity of storage shadow data.
Read in the process at image, change appears in the sensitivity that the irradiates light of arbitrary sometimes lamp 41 measures existing change and arbitrary organic photoelectric diode 61a.Even in this case, because before read pixel row 68 arrive image reading position P1, upgrade shadow data, so can obtain to reflect the shadow data of this change of shining light quantity and/or sensitivity, the feasible view data that can obtain the image information on the more faithful to original copy.
Preferably, should make and read distance between P2 place, position standard 42 and the lamp 41 at standard and equal distance between original copy D of image reading position P1 place and lamp 41.This feasible irradiation light quantity to standard 42 is approximately equal to the irradiation light quantity to original copy D, thereby can carry out shade correction more accurately.
(the 3rd embodiment)
Then, with reference to the Fig. 8 and the 9 explanation third embodiment of the present invention.Fig. 8 is the expanded view that expression is arranged according to the read pixel in the scanning element of the image read-out of the 3rd embodiment.Fig. 9 is the perspective view of expression according to the structure of the major part of the scanning element of the image read-out of the 3rd embodiment.
Among second embodiment, need in half of scanning element 59 rotation distance L2, finish reading of original copy D or reading of standard 42.As a result, the velocity of rotation of scanning element 59 is to consider the switching response of organic transistor 61b and definite, and this has limited the quickening of original copy reading speed.
Present embodiment is different from the second embodiment part and is to the word line that is connected with read pixel 61 provides many capable decoding lines, and carries out reading of original copy D and reading of standard 42 simultaneously.In others, the structure of present embodiment is basic identical with second embodiment.
More specifically, as shown in Figure 8, read pixel row 68a is connected with word line 63a, and this word line 63a is connected with the first row decoding line 67a.Be located at the downstream of read pixel row 68a and adjacent with it another read pixel row 68b is connected with word line 63b along the rotation direction of scanning element 59, this word line 63b is connected with secondary series decoding line 67b.Another read pixel row 68c sees the downstream that is located at read pixel row 68b and adjacent with it along the rotation direction of scanning element 59, and these read pixel row 68c is connected with word line 63c, and this word line 63c is connected with the first row decoding line 67a again.A read pixel row 68d is located at the downstream of read pixel row 68c and adjacent with it along the rotation direction of scanning element 59 again, and these read pixel row 68d is connected with word line 63d, and this word line 63d is connected with secondary series decoding line 67b again.
Similarly, the word line 63 that is used for other read pixel row 68 alternately is connected with 67b with the first and second row decoding line 67a.
As shown in Figure 9, on an end face of scanning element 59, provide annular terminal 65a, 65b, 83a, 83b and 83c.Terminal 65a is connected with row decoding line 67a, and terminal 65b is connected with row decoding line 67b.Terminal 83a is connected with row decoding line 69, and terminal 83b is connected with bit line selector control line 91, and terminal 83c is connected with wordline selector control line 92. Terminal 66a, 66b, 84a, 84b and 84c respectively with terminal 65a, 65b, 83a, 83b and 83c sliding contact, and each all forms spring contact.Each terminal 66a, 66b, 84a, 84b and 84c are connected with image processing part 58.Adopt this structure,, also can keep image processing part 58 and go being connected between decoding line 69, row decoding line 67a, 67b, bit line selector control line 91, the wordline selector control line 92 even scanning element 59 is rotated.
In the present embodiment, suppose as shown in Figure 8 to represent in the scanning element 59 to read from the read pixel row 68a that arrives image reading position P1 to standard with L1 the circumferential distance of position P2, then distance L 1 is set to and satisfies the relation shown in the following formula.
L1=mL2, m representative here is not less than 3 odd number.
L2 represents the circumferential distance between the adjacent read pixel row 68.
Like this, distance L 1 is set equal to the odd-multiple of the circumferential distance L2 between the adjacent read pixel row 68, and standard 42 is located at standard and reads the corresponding position of position P2, and this standard reads position P2 and satisfies distance L 1 with respect to image reading position P1.
As a result, when certain read pixel row 68a arrived image reading position P1, another read pixel row 68m arrived standard and reads position P2.In other words, the time of read pixel row 68a arrival image reading position P1 equals the time that read pixel row 68m arrival standard reads position P2.
The read pixel row 68a that is positioned at image reading position P1 is connected with the first row decoding line 67a via wordline selector 70a, thus the reading of carries out image information.Simultaneously, be positioned at the read pixel row 68m that standard reads position P2 and be connected with secondary series decoding line 67b, thereby carry out reading of standard 42 (shadow data) via wordline selector 70b.
As a result, can before next read pixel row 68b arrives image reading position P1, finish and utilize the image information of read pixel row 68a to read.In other words, according to present embodiment, reading of image information can be carried out in such time period, and this time period is two double-lengths of the time period of reading images information among second embodiment.Similarly, can before reading position P2, next read pixel row 68n arrival standard finish reading of standard 42.Thus, reading of standard 42 can be carried out in such time period, and this time period is two double-lengths that read the time period of standard 42 among second embodiment.This has relaxed the restriction of the response of organic transistor 61b to the original copy reading speed, makes to accelerate the original copy reading speed.
(the 4th embodiment)
Then, with reference to Figure 10-15 explanation fourth embodiment of the present invention.Figure 10 is that expression is equipped with the longitudinal sectional view according to the structure of the imaging device of the image read-out of the 4th embodiment.Figure 11 A is the longitudinal sectional view of the structure of parts on every side that schematically shows scanning element 200 shown in Figure 10.Figure 11 B is the longitudinal sectional view of excision portion of the strap-like member of expression scanning element 200 shown in Figure 10.Figure 12 A is the perspective view of structure of the major part of expression scanning element 200 shown in Figure 10; Figure 12 B is the longitudinal sectional view of the roller of expression scanning element 200 shown in Figure 11.Figure 13 is the vertical view at the junction surface of the end of strap-like member shown in the part excision ground presentation graphs 12A.Figure 14 is the longitudinal sectional view at the junction surface of the end of strap-like member shown in the presentation graphs 12A.Figure 15 is another routine longitudinal sectional view of the structure at the junction surface between the end of strap-like member shown in the presentation graphs 12A.
Present embodiment is different from first to the 3rd embodiment part that adopts cylindric scanning element 59 and is that it adopts the scanning element with endless belt, read pixel with cells arranged in matrix on this endless belt.
More specifically, as shown in figure 10, the imaging device of present embodiment comprises image read-out A with scanning element 200 and the printing equipment B that forms image based on the image information that this image read-out A reads on paper.Image read-out A comprises that scanning element 200 is assembled in the ADF40 in it.In the present embodiment, the parts identical with the corresponding component of first embodiment represent with same numbers, and will simplify or omit the explanation to them.
Shown in Figure 11 A, scanning element 200 comprises endless belt 201 and a pair of pulley 202,203, and 201 of this strap-like members are located at this between the pulley 202,203.Strap-like member 201 is made by the flexible sheet base material.Shown in Figure 11 B, a plurality of read pixels 61 are located on the strap-like member 201.Read pixel 61 is located on the strap-like member 201 with the pattern identical with arranged pattern shown in Figure 4.In addition, being used to set up the distribution that connects between the read pixel 61 has and the first embodiment identical construction.The back side of each read pixel 61 is formed with photomask 62.Be used to protect the protective film 80 of read pixel 61 to be formed in the front of strap-like member 201.The printing technology of read pixel 61 and their peripheral circuit utilization such as precision is formed on the outer peripheral face of strap-like member 201.
Shown in Figure 12 A, a plurality of annular terminal 83a, 83b, 83c and 65 are located on the strap-like member 201 and extend with an edge along this strap-like member 201.Terminal 83a is connected with row decoding line 69, and terminal 65 is connected with row decoding line 67, and terminal 83b is connected with bit line selector control line 91, and terminal 83c is connected (details is referring to Fig. 4 A and 4B) with wordline selector control line 92. Splicing ear 84a, 84b, 84c and 66 are configured to respectively and terminal 83a, 83b, 83c and 65 sliding contacts, and are electrically connected with image processing equipment 58.Even when strap-like member 201 rotates, splicing ear 84a, 84b, 84c and 66 also with terminal 83a, 83b, 83c and 65 sliding contacts, thereby guarantee being connected between image processing part 58 and row decoding line 69, row decoding line 67, bit line selector control line 91, the wordline selector control line 92.
Shown in Figure 11 A, pulley 202 is made by the printing opacity hollow cylinder.Pulley 202 comprises and extends with its axis coaxle and be assembled in elongated lamp 41 in it.Shown in Figure 12 B, two of pulley 202 are open ended, and supporting member 41a is installed on each end.This supporting member 41a supports lamp 41.Supporting member 41a also rotatably support utilizes the pulley 202 of the drive force that drive motor 772 produces.
The same with first embodiment, in the present embodiment, finish after the reading of standard 42 at image reading position P1, read the original copy D that gives from ADF40.That is to say, carry out reading of standard 42 and reading of original copy D in the same position (image reading position P1) of reading.Read operation separately is basic identical with first embodiment.
Then, with reference to Figure 13 and 14, a junction surface that the end engages with its other end of strap-like member 201 is described.
As shown in figure 13, strap-like member 201 is formed by flat substrates 210, has a plurality of read pixels 61 of being arranged to matrix form on the surface of this flat substrates 210, and an end 210a of this flat substrates 210 is overlapped with its other end 210b and engage.In the 201a of the junction surface of strap-like member 201, there is part 201b (hereinafter referred to as disappearance portion) without any read pixel row 68.Here suppose that the 201b of disappearance portion is the zone between read pixel row 68b and the read pixel row 68a.
From the longitudinal direction of strap-like member, the length of the 201b of disappearance portion is longer than the interval between other read pixel row 68.As a result, when reading original copy, the image information of the 201b of disappearance portion disappearance.Therefore, based on the image information sheet that reads by the intervenient read pixel row of the 201b of disappearance portion 68a, 68b, carry out the interpolation of the image information be used to generate the 201b of this disappearance portion and handle.This interpolation processing and utilizing image processing part 58 is implemented, and makes to suppress as far as possible because the image confusion that the disappearance image information causes in the 201b of disappearance portion does not have any practical problem thereby carries out image reads.
More specifically, an end 210a of the flat substrates 210 of formation strap-like member 201 is formed with capable decoding line 69, bit line selector control line 91 and bit line selector 71.Therefore, an end 210a and the other end 210b is overlapped and engage makes that row decoding line 69, bit line selector control line 91 and bit line selector 71 are overlapping between read pixel row 68a and 68b.It should be noted that these ends 210a, 210b are overlapping, make an end 210a be located at the below of the other end 210b.Adopt this structure, can shorten the length of the 201b of disappearance portion in the 201a of junction surface.As a result, making needs the zone of interpolated image information littler, thereby makes the image that adopts the interpolation acquisition more near real image.
As shown in figure 14, suppose here to represent distance between the intervenient read pixel row of the 201b of disappearance portion 68a, the 68b in the junction surface 201a of strap-like member 201 with L3.Preferably, distance L 3 is set equal to the integral multiple of the distance L 2 between the adjacent read pixel row 68.In the case, when implementing interpolation based on other image information when obtaining the image information of junction surface 201a, the image information that is obtained is flexible.
According to present embodiment, under the ADF scan pattern, utilize the strap-like member 201 of pulley 202 and 203 rotation driven sweep unit 200, in the time of between original copy D is through this strap-like member 201 and pressing means 23, utilize the read pixel row 68 of this strap-like member 201 to read original copy D along main scanning direction.Then, the image information input picture handling part 58 that is read.The image information of 58 pairs of inputs of this image processing part carries out the shade correction or other is revised, thereby generates the view data that can utilize printing equipment B to handle.
To drive strap-like member 201 with the approximately equalised circumferential speed rotation of the transfer rate of original copy D, therefore the same with the scanning element 59 of first embodiment, read pixel row 68 (read pixel 61) move along sub scanning direction hardly with respect to original copy.For this reason, the same with first embodiment, even on dust or stain the surface, also will never generate because the image striped that dust or stain cause attached to original copy D or strap-like member 201.
In the present embodiment, shine light quantity on the original copy D from lamp 41 via the junction surface 201a (part between read pixel row 68a and the 68b) of strap-like member 201 and be less than light quantity on the other parts that shine this original copy.When utilizing read pixel row 68a or 68b to read, utilize especially read pixel row 68b to read original copy D, the irradiation light quantity of this original copy D is slightly less than irradiation light quantity when utilizing any other read pixel row 68 to read.This is because of that part of the overlapping that have read pixel row 68b of end 210a with end 210b.
Irradiation light quantity unanimity for 68 pairs of these original copys of all read pixel row D of being used in the strap-like member 201 that reads original copy D can adopt the illustrative joint construction of Figure 15.In the case, any read pixel row 68 are not located at the part place corresponding with junction surface 201a, thus, and for all read pixel row 68, much at one to the irradiation light quantity of original copy D.
(the 5th embodiment)
Then, with reference to Figure 16 the fifth embodiment of the present invention is described.Figure 16 is the longitudinal sectional view of expression according to the junction surface of the strap-like member in the image read-out of the 5th embodiment.
As shown in figure 16, in the present embodiment, when forming endless belt 201, end 210a of crooked flat substrates 210 and the other end 210b thereof, overlapping with mutual subtend, join to together then through the end of bending 210a, 210b, form endless belt 201 thus.
A plurality of read pixels 61 are located at matrix form on the surface of flat substrates 210, and a plurality of read pixel row 68 are along vertical formation of this flat substrates 210.Here hypothesis row decoding line 69, bit line selector control line 91 and bit line selector 71 are formed in the 210a of end.
Adopt this joint construction, can form strap-like member 201 and do not form disappearance portion essential among the 4th embodiment without any read pixel row 68.More specifically, suppose here to represent through junction surface 201c intervenient read pixel row 68a that the end of bending 210a, 210b are bonded with each other and the distance between the 68b, represent distance between the adjacent read pixel row 68 with L2 with L3.Be bent and be not formed with the end 201a of any read pixel 61, the length of 201b by adjustment, distance L 3 and L2 are equated.This has been avoided providing the disappearance portion without any read pixel row 68.Therefore, different with the 4th embodiment, do not need the interpolation of carries out image information.
It is slightly little to shine the light quantity that the light amount ratio on the original copy D shines on the other parts from lamp 41 via the junction surface 201c (part between read pixel row 68a and the 68b) of strap-like member 201.The minimizing of this original copy D irradiation light quantity that causes owing to the existence of junction surface 201c can be ignored.This expression can make the irradiation light quantity of original copy D almost equal for all read pixel row 68.It should be noted that the length of junction surface 201c is short to is enough to prevent that the interference between this junction surface and the pulley 202,203 is just enough.Shown in Figure 14 and 15 relevant with the 4th embodiment, the junction surface can overlap on end 210.
In the 4th and the 5th embodiment, carry out reading of standard and reading of original copy D at same position (image reading position P1).Replace, that can carry out shadow data simultaneously as second embodiment obtains reading of (reading of standard 42) and original copy D.In the case, the 4th is deformed into the 5th embodiment and makes standard 42 be located at different positions with pressing means 23, so that read standard 42 in the position different with the image reading position P1 that is used to read original copy D.
Below, the sixth embodiment of the present invention will be described.
(the 6th embodiment)
Be equipped with imaging device according to the image read-out of present embodiment textural basic identical, so will omit explanation it with first embodiment.
Then, with reference to the scanning element 59 of Figure 17-20 detailed description according to the image read-out of present embodiment.Figure 17 is the longitudinal sectional view of the structure of parts on every side that schematically shows scanning element 59.Figure 18 A is the end of expression scanning element and the perspective view of the joint construction between the image processing part, and Figure 18 B is the other end of expression scanning element shown in Figure 1 and the perspective view of the joint construction between the image processing part.Figure 19 be expression array structure of a plurality of read pixels and peripheral circuit thereof diagrammatic sketch.Figure 20 be the expression can with the array structure of a plurality of read pixels of replacing shown in Figure 19 and the diagrammatic sketch of peripheral circuit thereof.
Scanning element 59 constitutes according to substantially identical with the scanning element 59 of first embodiment shown in Fig. 2 A to 4B mode.Concrete, as shown in figure 17, the scanning element 59 of present embodiment comprises along the cylindrical element 60 that extends with the perpendicular direction (main scanning direction) of the direction of transfer of original copy D and made by transmitting substrate.Elongated lamp 41 is assembled in the cylindrical element 60.This cylindrical element 60 has relative open end, and is used to support the supporter 41a (Fig. 3 B) of lamp 41 to be installed in this open end.The actuating force that utilization is transmitted from drive motor, along the direction that transmits original copy D with the approximately equalised circumferential speed rotation of the transfer rate of this original copy D driven sweep unit 59.
Be different from the pressurization part 23 according to first embodiment shown in Fig. 2 A, pressurization part 23 comprises a pair of pulley 23a, 23b as shown in figure 17 and opens and be located at this to the strap-like member 23c between pulley 23a, the 23b.The part of strap-like member 23c contacts with the outer peripheral face of the cylindrical element 60 of scanning element 59, thus the roll gap portion 32 that between this part outer peripheral face of this strap-like member, is formed for clamping and transmits original copy D with the cylindrical element 60 that is in contact with it.Thus, utilize pressurization part 23 that the original copy that is transmitted is contacted with the outer peripheral face face of cylindrical element 60 as pressurized equipment.Roll gap portion 32 has predetermined length, and this predetermined length is set to original copy D is fully closely contacted with the outer peripheral face of cylindrical element 60.Strap-like member 23c rotates along with the rotation of scanning element 59.
The same with first embodiment shown in the 3B with Fig. 3 A, a plurality of read pixels 61 (Fig. 2 B) are located on the outer peripheral face of cylindrical element 60 with matrix form.
More specifically, shown in Figure 18 B, a plurality of read pixel row 68 are located on the outer peripheral face of this cylindrical element 60 along the circumferencial direction of cylindrical element, and have certain interval between these read pixel row.Each read pixel row 68 comprises a plurality of read pixels 61.These read pixels 61 axially are separated from each other with certain interval along cylindrical element 60.The photomask 62 that is used to stop the light of lamp 41 directly to inject read pixel 61 is located at the back side of each read pixel 61, and is used to protect the protective layer 80 of this read pixel 61 to be formed on the outer peripheral face of cylindrical element 60.
The read pixel 61 that is positioned on the outer peripheral face of cylindrical element 60 is arranged deployable one-tenth arranged shown in Figure 19.This arranged is identical with shown in Fig. 4 A almost.Concrete, those read pixels 61 (forming those read pixels 61 of read pixel row 68) of being arranged to row along the direction of rectangular array are connected with word line 63 and are connected with row decoding line 67 via wordline selector 70.Those read pixels 61 of being arranged to row along the direction of row matrix are connected with bit line 64 and are connected with row decoding line 69 via bit line selector 71.Wordline selector 70 not foundation is controlled from 92 signal supplied of wordline selector control line shown in Fig. 4 A, and according to controlling from column selector line 82 signal supplied.Bit line selector 71 not foundation is controlled from the control line of bit line selector shown in Fig. 4 A 91 signal supplied, and according to controlling from row selector line 81 signal supplied.By control wordline selector 70 and bit line selector 71, specify the address of expection row decoding line 67 and expection row decoding line 69, thereby can read the current value of expection read pixel 61.
Each read pixel 61 is configured to be similar to the read pixel shown in Fig. 4 B, therefore will omit the explanation to it.
In the present embodiment, adopt the circuit structure that provides many row decoding lines 67 as shown in figure 20.This is in order to carry out reading of original copy D and reading of standard 42 simultaneously.Each read pixel 61 has and identical construction shown in Fig. 4 B.
Here read pixel row 68a, the 68b that supposes to form by the read pixel 61 of being arranged to row along column direction ..., 63s, 63t ... the downstream direction towards scanning element 59 is arranged in this order.The word line 63a that is connected with read pixel row 68a is connected with the first row decoding line 67a via wordline selector 70a.The word line 63b that is connected with read pixel row 68b is connected with secondary series decoding line 67b via wordline selector 70b, this read pixel row 68b and read pixel row 68a adjacency.The word line 63c that is connected with read pixel row 68c is connected with the 3rd row decoding line 67c via wordline selector 70c.The word line 63d that is connected with read pixel row 68d is connected with the 4th row decoding line 67d via wordline selector 70d.The word line 63e that is connected with read pixel row 68e is connected with the 5th row decoding line 67e via wordline selector 70e.The word line 63f that is connected with read pixel row 68f is connected with the 6th row decoding line 67f via wordline selector 70f.In addition, the word line 63g that is connected with read pixel row 68g is connected with the first row decoding line 67a via wordline selector 70g, these read pixel row 68g be configured to read pixel row 68f along adjacency on the downstream of cylindrical element 60 rotation directions.
Similarly, every the word line 63 that connects with corresponding read pixel row 68 in order with row decoding line 67a to 67f in corresponding one be connected.
Under the situation that adopts circuit structure as shown in figure 20, on an end face of scanning element 59, shown in Figure 18 A, provide a plurality of annular terminal 83a, 83b, 65a, 65b and 65c.Terminal 83a is connected with row decoding line 69, and terminal 83b is connected with row selector control line 81, and terminal 65a is connected with the first row decoding line 67a, and terminal 65b is connected with secondary series decoding line 67b, and terminal 65c is connected with the 3rd row decoding line 67c.
Shown in Figure 18 B, on the other end of scanning element 59, provide a plurality of annular terminal 65d, 65e, 65f and 83c.Terminal 65d is connected with the 4th row decoding line 67d, and terminal 65e is connected with the 5th row decoding line 67e, and terminal 65f is connected with the 6th row decoding line 67f.Terminal 83c is connected with column selector line 82.
Even when scanning element 59 is rotated, splicing ear 84a to 84c and 66a to 66f also keep respectively and terminal 83a to 83c and 65a to 65f sliding contact.As a result, even in scanning element 59 rotating process, also keep image processing part 58 and go being connected between decoding line 69, first to the 6th row decoding line 67a to 67e, row selector line 81, the column selector line 82.
With reference to Figure 21-26, the ADF scan pattern will be described.Figure 21 to 23 is expression read pixel diagrammatic sketch that move in scanning element 59 and standard 42 opposed facing area E.Figure 24 to 26 is the diagrammatic sketch that move in the roll gap portion 32 of expression read pixel between scanning element 59 and pressurization part 23.
When manipulation operations portion (not shown) reads the instruction of original copy with generation with the ADF scan pattern, utilize drive motor along original copy direction of transfer rotary scanning unit 59, and obtain shadow data.
When obtaining shadow data, in the organic photoelectric diode 61a of each read pixel 61 of standard 42, generating according to current value from the light of these standard 42 reflections.By switch organic transistor 61b (Fig. 4 B) in turn, read as the signal of telecommunication via the current value that word line 63 will generate in the organic photoelectric diode 61a of read pixel 61.The signal of telecommunication of being read all is converted to and is used for the shadow data that carries out the shade correction at image processing part 58.This shadow data is stored in the memory (not shown) together with the address date of corresponding read pixel 61.
Here suppose that read pixel row 68a, 68b and 68c arrive the area E (Figure 21) towards standard 42.In the read pixel 61 of these read pixel row, according to photogenerated current value from standard 42 reflections.
Suppose to represent read pixel row 68a, 68b and 68c by the needed time period of area E, be illustrated in this current value that generates in read pixel row 68a, the 68b of standard 42 and the 68c with T2 and increase and stablize the needed time period with T1.In the case, concern T2＜T1, can before these read pixel row 68a, 68b and 68c are by area E, read stable current value (shadow data) so from these read pixel row 68a, 68b and 68c if satisfy.For this reason, the length of area E (along cylindrical element 60 circumferencial directions) is determined based on the velocity of rotation of scanning element 59, to satisfy the relation between time period T1 and the T2.
When reading shadow data, wordline selector 70a, 70b are connected read pixel row 68a to 68c respectively with 70c with first to the 3rd row decoding line 67a-67c.Then, switch bit line options device 71 is with assigned address in order, and reads the shadow data sheet from read pixel row 68a to 68c.If the switching response of read pixel 61 is slow, reading shadow data from all read pixels 61 that constitute read pixel row 68 so just needs the more time.
Thereby, read at the same time in the present embodiment of shadow data sheets of three row, use the certain hour section to read, this time period is to be listed as three times of time period of reading in turn under the shadow data sheet situation one.As a result, even the switching response of read pixel 61 is slow, also can use the sufficient time to read shadow data in by the process of area E at read pixel row 68a, 68b and 68c from these read pixel row 68a, 68b and 68c. Read pixel row 68a, 68b and the 68c time period by area E is corresponding to from state-transition shown in Figure 21 being the time period that state shown in Figure 22 needs.
During reading shadow data, follow-up read pixel row 68d, 68e and 68f enter area E, and the current value that generates in the read pixel 61 of these read pixel row 68d, 68e and 68f fully increases and become stable (Figure 23).Thus, finish read shadow data from previous read pixel row 68a, 68b and 68c after, and then just can read shadow data from follow-up read pixel row 68d, 68e and 68f.
As mentioned above, in the present embodiment, scanning element 59 extends to a plurality of read pixel row 68 of covering towards the area E of standard 42, and read pixel row 68 are connected with many row decoding lines 67 in order.According to this structure,, also can guarantee to have the grace time that is long enough to make the current value that generates among this organic photoelectric diode 61a to become stable, thereby can read shadow data reliably even the light-to-current inversion response of organic photoelectric diode 61a is slow.In addition, owing to read the shadow data sheet from a plurality of read pixel row 68 simultaneously, so, also can shorten shadow data and read needed total time even the switching response of organic transistor 61b is slow.This makes can obtain more large-duty image read-out.
For obtaining identical productivity ratio, can reduce the switching frequency that is used for reads image data, make and can adopt cheap clock generator and reduce the noise that device sends.
ADF40 separates according to more than of a kind of like this modes ground and transmits the original copy D that is deposited on the original copy pallet 12, makes every original copy D arrive this roll gap portion 32 when finishing the roll gap portion 32 that read pixel row 68 that shadow data obtains arrive between scanning elements 59 and the pressurization part 23.In roll gap portion 32, every original copy D is transmitted when being held between pressurization part 23 and the scanning element 59.Concrete, this original copy of transmission D under the surface of the original copy D that will read and scanning element 59 tight state of contact.At this moment, receive from the light of this original copy D reflection, and generate according to light income and promptly be formed on the image information on the original copy D and the current value that changes towards the read pixel 61 of original copy D.
For example, arrive roll gap portion 32 and finished read pixel row 68a, 68b that shadow data obtains and the read pixel 61 of 68c in, generate and the corresponding current value (Figure 24) of image on the original copy.Here suppose to represent read pixel row 68a, 68b and 68c by the 32 needed time periods of roll gap portion, be illustrated in this current value that generates in read pixel row 68a, the 68b of original copy D and the 68c with T4 and increase and stablize the needed time period with T3.In the case, concern T4＜T3, can before these read pixel row 68a, 68b and 68c are by roll gap portion 32, begin to read stable current value (image information) (Figure 25) so from these read pixel row 68a, 68b and 68c if satisfy.For this reason, the length of roll gap portion 32 (along cylindrical element 60 circumferencial directions) is determined based on the velocity of rotation of scanning element 59, to satisfy the relation between time period T3 and the T4.
In the process of reading images information, wordline selector 70a to 70c is connected read pixel row 68a to 68c respectively with respective column decoding line 67a to 67c.Then, switch bit line options device 71 is with assigned address in order, thus the reading images message slot.At this moment, if the switching response of the organic transistor 61b of each read pixel 61 is slow, just need the more time from all read pixel 61 reading images information that constitute read pixel row 68 so.
In the present embodiment, the same with the situation that reads shadow data, read the three image information sheets that are listed as simultaneously.Be listed as in order the situation of reading images information and compare with one, can use the time period reading images information of three double-lengths.Therefore, even if the switching response of read pixel 61 is slow, also can guarantee to have the time that is long enough to from these read pixel row 68a, 68b and 68c reading images message slot at read pixel row 68a, 68b and 68c by before the effluxion of roll gap portion 32. Read pixel row 68a, 68b and the 68c time by roll gap portion 32 is corresponding to from state-transition shown in Figure 25 being the time that state shown in Figure 26 needs.Owing to, read needed total time of these image information sheets so can shorten simultaneously from a plurality of read pixel row 68 reading images message slots.
During reads image data, follow-up read pixel row 68d, 68e and 68f enter roll gap portion 32, and the current value that generates in the read pixel 61 of these read pixel row 68d, 68e and 68f fully increases and become stable (Figure 26).Thus, finish behind previous read pixel row 68a, 68b and 68c reading images information, and then just can be from follow-up read pixel row 68d, 68e and 68f reading images information.
Then, with reference to Figure 20 the read pixel row 68 of reading images information are described and read relation between the read pixel row 68 of shadow data.
According to embodiments of the invention, carry out reading of image information and reading of shadow data simultaneously.Suppose when the read pixel row 68a, the 68b that are connected with 67c with first to the 3rd row decoding line 67a, 67b respectively and 68c arrive roll gap portion 32, with the 4th to the 6th row decoding line 67d, read pixel row 68s, 68t that 67e is connected with 67f and 68u arrive area E respectively.
In the case, use first to the 3rd row decoding line 67a, 67b and 67c three read pixel row 68a, 68b and the 68c reading images message slot from being positioned at roll gap portion 32 simultaneously.Simultaneously, use the 4th to the 6th row decoding line 67d, 67e and 67f read the shadow data sheet from three read pixel row 68s, 68t and the 68u that is positioned at area E simultaneously.
In this manner, can adopt different decoding lines, simultaneously reading of carries out image data and reading of shadow data.Compare with carrying out this two situation about reading respectively, can realize more large-duty image read-out.
As above illustrated, according to present embodiment, scanning element 59 is to rotate with the approximately equalised circumferential speed of the transfer rate of original copy D.Therefore, in the process of reading in and reading image information, read pixel row 68 never move along sub scanning direction with respect to the original copy D that is transmitted.As a result, can verily reproduce image on the original copy D by the view data of reading in.In addition, even on the surfaces attached to original copy D or scanning element 59 such as dust, stain, the image of reading of dust or stain also never extends along sub scanning direction.Therefore, do not produce because any image striped that dust or stain cause.
Read shadow data and image information from a plurality of read pixel row 68 simultaneously and make to shorten and read this shadow data and needed total time of image information, thereby realize large-duty image read-out.
(the 7th embodiment)
Then, with reference to Figure 27 the seventh embodiment of the present invention is described.Figure 27 is the circuit diagram of expression according to the structure of the read pixel of the image read-out of present embodiment.
The 6th embodiment is configured to directly to read out in the current value that generates in the read pixel 61 of original copy or standard.On the contrary, the read pixel 61 of present embodiment all provides the capacitor that is used to accumulate electric charge.In this, present embodiment is different from the 6th embodiment.
In the present embodiment, as shown in figure 27, read pixel 61 provides capacitor 61c and the organic transistor 61d that is used to accumulate electric charge.The electric charge accumulation that utilization generates as the organic photoelectric diode 61a of the components of photo-electric conversion is in capacitor 61c.Organic transistor 61d makes organic photoelectric diode 61a be electrically connected with capacitor 61c or disconnects.
The organic photoelectric diode 61a that arrives area E and this read pixel 61 when given read pixel 61 received from the light time of standard 42 reflections, and this organic photoelectric diode 61a generates electric charge.Organic transistor 61d makes organic photoelectric diode 61a be connected with capacitor 61c, and the electric charge that generates among this organic photoelectric diode 61a is stored in the capacitor 61c.After accumulating the electric charge predetermined amount of time, organic transistor 61d disconnects organic photoelectric diode 61a and capacitor 61c electricity, thereby finishes accumulating of electric charge.After finishing the accumulating of electric charge, connect organic transistor 61b, be shadow data thereby can read the electric charge that is accumulated among the capacitor 61c.
Then, the organic photoelectric diode 61a that arrives roll gap portion 32 and this read pixel 61 when read pixel 61 received from the light time of original copy D reflection, and this organic photoelectric diode 61a generates the electric charge according to the image change on the original copy.Then, organic transistor 61d makes organic photoelectric diode 61a be connected with capacitor 61c, thus the charge storage that generates among this organic photoelectric diode 61a in capacitor 61c.After accumulating the electric charge predetermined amount of time, organic transistor 61d disconnects organic photoelectric diode 61a and capacitor 61c electricity, thereby finishes accumulating of electric charge.After finishing the accumulating of electric charge, connect organic transistor 61b, be view data thereby can read the electric charge that is accumulated among the capacitor 61c.
As above illustrated, the charge storage that present embodiment is configured to the reverberation by standard 42 or original copy D is generated is in capacitor 61c, and this makes and can adopt the sufficiently long time period to accumulate shadow data or view data.As a result,, also can accumulate the image on benchmark spare 42 or the original copy and enough quantities of electric charge of changing, and the S/N of shadow data or view data is than improving even the light-to-current inversion efficient of organic photoelectric diode 61a is low.In addition, the light quantity of lamp 41 can be less, so energy consumption is little, thereby reduces because the organic semi-conductor deterioration that heat or photoconduction cause.As a result, its life-span prolongs.
As for reading the electric charge (image information or shadow data) that is accumulated among the capacitor 61c, the size of roll gap portion 32 or area E can be even as big as accumulating image information or shadow data.As a result, compare with first embodiment, the size of standard 42 and pressurization part 23 reduces, and this makes and can further reduce device size and the design freedom that reduces cost and further improve the device layout.
In addition, when accumulating shadow data, move along with moving of read pixel row 68 position of reading of standard 42.As a result, the shadow data of accumulating the electric charge acquisition that is generated by the reverberation based on standard 42 is approximately the obtainable shadow data of a kind of like this standard of employing, and the reflection coefficient of this standard equals the average reflection coefficient of standard 42.Concrete, though the reflection coefficient of standard 42 from this part to that part of difference, the difference of this reflection coefficient also is absorbed so that the shadow data equalization that is obtained, thereby can obtain the more reading images of equalization.Even this means that for example standard 42 parts are attached with stain, this, makes to obtain more stable reading images to the adverse effect of shadow data also equalization and reduce attached to the stain on the standard 42.
In the 6th and the 7th embodiment, scanning element 59 is made of cylindrical element.Optionally, scanning element can be made of the endless belt.In the case, a plurality of read pixels with cells arranged in matrix on the endless belt, and along the original copy direction of transfer with this strap-like member of the approximately equalised speed drive of original copy transmission speed.
Below, the eighth embodiment of the present invention will be described.
(the 8th embodiment)
Figure 28 is the longitudinal sectional view of expression according to the structure of the image read-out of present embodiment.
The image read-out A of present embodiment is configured to basic identical with the device A of first embodiment shown in Figure 1, is that it can carry out two-sided reading and be different from the first embodiment part.More specifically, as shown in figure 28, the image read-out A of present embodiment is made up of ADF40 with original detection sensor 45 and scanning means 20.The original copy D that is deposited on the original copy pallet 12 more than Di separates with pair of separated roller 44a, 44b via pick-up roller 43, is introduced into U sigmoid transfer path 40a then.Every original copy D utilizes transfer roller 46 to be sent to reading part 30 along transfer path 40a with predetermined fixedly transfer rate.The document edge transducer 47 that is used to detect original copy D end is located near the transfer roller 46.
Reading part 30 provides scanning element 59, a pair of being configured to towards the pressing means 23,55 of this scanning element 59 and the standard 42 that is used to obtain shade correction data (shadow data).Be formed with roll gap portion between scanning element 59 and the pressing means 23, and be formed with roll gap portion between scanning element 59 and the pressing means 59.When original copy D when the reading part 30, utilize scanning element 59 to read image information on this original copy D.The details of reading part 30 will be in explanation subsequently.
Original copy D by reading part 30 utilizes transfer roller 48 to be delivered to breakout 31 along transfer path 40b.Provide counter-rotating baffle plate 54 between transfer roller 48 and the breakout 31, because the gravity of counter-rotating baffle plate 54 self, the terminal 54a of this counter-rotating baffle plate 54 lets droop usually into transfer path 40b.The original copy D that utilizes transfer roller 48 to transmit moves up counter-rotating baffle plate 54, and this original copy D further is sent to distributing roller 49.Distributing roller 49 is discharged original copy D at it and is rotated forward on discharging pallet 50 time, and guides backward rotation when reversing transfer path 53 into as its original copy D.
The original copy D that introduces counter-rotating transfer path 53 further is sent to distributing roller 49 via reading part 30 along U sigmoid transfer path 40c.Then, original copy D is discharged to via distributing roller 49 and discharges on the pallet 50.
The same with ADF40 shown in Figure 1, ADF40 is configured to and can opens and closes with respect to scanning means 20.By opening ADF40, original copy D is placed on the pressuring plate glass 22 of scanning means 20.
Scanning means 20 uses scanning element 21 to read the original copy that is placed on the pressuring plate glass 22.Scanning element 21 constitutes according to the mode identical with scanning element shown in Figure 1, and will omit the explanation to it.
Image read-out A comprises two kinds of patterns, promptly adopts the ADF scan pattern of ADF40 and the fixedly Manuscript scanner pattern of employing scanning element 21, and can read original copy with arbitrary pattern.
Under the ADF scan pattern, ADF40 carries every the original copy D that is piled up on the original copy pallet 12.Every the original copy D that utilizes ADF to carry is sent to reading part 30, utilizes scanning element 59 to read to be positioned at the image information on first (front) of this original copy D there.
When having set the single-sweep pattern, the original copy D by reading part 30 utilizes transfer roller 48 to deliver to distributing roller 49 via counter-rotating baffle plate 54.Then, utilizing this distributing roller 49 that original copy D is discharged to discharges on the pallet 50.
On the other hand, when having set the duplex scanning pattern, its first face has been read the original copy D that portion 30 reads and has utilized transfer roller 48 to be sent to distributing roller 49 via counter-rotating baffle plate 54.Then, utilize distributing roller 49 to transmit original copy D, pass through counter-rotating baffle plate 54 until the rear end of this original copy D.Then, distributing roller 49 backward rotation, and original copy D is drawn towards counter-rotating transfer path 53 in the upper surface guiding by counter-rotating baffle plate 54, deliver to reading part 30 then.At reading part 30,, utilize this scanning element 59 to read this original copy D second (back side) as original copy D during by the roll gap portion between scanning element 59 and the pressing means 55.Original copy D by reading part 30 passes to distributing roller 49 along transfer path 40c, utilizes this distributing roller 49 to be discharged to then and discharges on the pallet 50.
Under fixing Manuscript scanner pattern, the same with first embodiment, scanning element 21 moves along sub scanning direction, reads original copy D on the pressuring plate glass 22 along main scanning direction simultaneously, thereby reads whole original copy.
Then, describe reading part 31 in detail with reference to Figure 29 to 31.Figure 29 is the longitudinal sectional view of the structure of parts on every side that schematically shows scanning element 59 shown in Figure 28.Figure 30 is the perspective view of the joint construction between expression scanning element shown in Figure 28 and the image processing part.Figure 31 be the expression can with the array structure of a plurality of read pixels of replacing shown in Fig. 4 A and the diagrammatic sketch of peripheral circuit thereof.
The scanning element 59 that is located in the reading part 30 constitutes according to identical with the scanning element 59 of first embodiment shown in Fig. 2 A to 4B substantially mode.Concrete, as shown in figure 29, the scanning element 59 of present embodiment comprises cylindrical element 60 and utilizes supporting member 41a (Fig. 3 B) to be installed in the lamp 41 of these cylindrical element 60 inside.Utilization passes to one of supporting member 41a from drive motor actuating force towards the direction that transmits original copy D with the approximately equalised circumferential speed rotation of the transfer rate of this original copy D driven sweep unit 59.
As shown in figure 29, pressing means 23 is configured to contact with the outer peripheral face of scanning element 59, and presses to the outer peripheral face of this scanning element 59 with predetermined pressure by spring part 23a.Be formed with the roll gap portion that is used for clamping and transmits original copy D between pressing means 23 and the scanning element 59.When original copy D passes through roll gap portion, this original copy D is contacted with the outer peripheral face of scanning element 59.Here, suppose the contact position between original copy D (pressing means 23) and the scanning element 59 is called the first image reading position P1.
Pressing means 55 is configured to diametric(al) along scanning element 59 towards pressing means 23.The same with pressing means 23, pressing means 55 is pressed to the outer peripheral face of scanning element 59 with predetermined pressure by spring part 55a.Be formed with the roll gap portion that is used for clamping and transmits original copy D between pressing means 55 and the scanning element 59.When original copy D passes through roll gap portion, this original copy D is contacted with the outer peripheral face of scanning element 59.Suppose the contact position between original copy D (pressing means 55) and the scanning element 59 is called the second image reading position P3.
The same with first embodiment shown in the 3B with Fig. 3 A, a plurality of read pixels 61 (Fig. 2 B) are located on the outer peripheral face of cylindrical element 60 with matrix form.
More specifically, as shown in figure 30, a plurality of read pixel row 68 are located on the outer peripheral face of this cylindrical element 60 with certain space along the circumferencial direction of cylindrical element 60.Each read pixel row 68 comprises a plurality of read pixels 61 axially arranged at certain intervals along cylindrical element 60.The photomask 62 that is used to stop the light of lamp 41 directly to inject read pixel 61 is located at the back side of read pixel 61.Be used to protect the protective layer 80 of read pixel 61 to be formed on the outer peripheral face of cylindrical element 60.
Be positioned at the deployable one-tenth arranged of arrangement of the read pixel 61 on the outer peripheral face of cylindrical element 60.This arranged is identical with the arrangement shown in Fig. 4 A, and will omit the explanation to it.
Read pixel 61 constitutes according to the mode identical with the read pixel shown in Fig. 4 B, and will omit the explanation to it.
The same with the 3rd embodiment shown in Figure 8, present embodiment can adopt the circuit arrangement with many row decoding lines 67 as shown in figure 31.This is in order to carry out reading of original copy D and reading of standard 42 simultaneously.Each read pixel 61 has and above-mentioned read pixel identical construction.
Here suppose by the read pixel row 68a, the 68b that form of read pixel 61 that is arranged to row along column direction ..., 63k ..., 63m ... the downstream direction towards scanning element 59 is arranged in this order.The word line 63a that is connected with read pixel row 68a is connected with the first row decoding line 67a via wordline selector 70a.The word line 63b that is connected with read pixel row 68b is connected with secondary series decoding line 67b via wordline selector 70b, this read pixel row 68b and read pixel row 68a adjacency.The word line 63c that is connected with read pixel row 68c is connected with the 3rd row decoding line 67c via wordline selector 70c.The word line 63d that is connected with read pixel row 68d is connected with the first row decoding line 67a via wordline selector 70d.
Similarly, every the word line 63 that connects with corresponding read pixel row 68 in order with row decoding line 67a to 67c in corresponding one be connected.
When the circuit structure that adopts as shown in figure 31, on an end face of scanning element 59, provide a plurality of annular terminal 65a, 65b, 65c, 83a, 83b and 83c as shown in figure 30.Terminal 65a is connected with the first row decoding line 67a, and terminal 65b is connected with secondary series decoding line 67b, and terminal 65c is connected with the 3rd row decoding line 67c.Terminal 83a is connected with row decoding line 69, and terminal 83b is connected with digit selector line 91, and terminal 83c is connected with word selector line 92.
Even when scanning element 59 is rotated, splicing ear 66a to 66c and 84a to 84c also keep respectively and corresponding terminal 65a to 65c and 83a to 83c sliding contact.As a result, even in scanning element 59 rotating process, also keep image processing part 58 and go being electrically connected between decoding line 69, first to the 3rd row decoding line 67a to 67c, bit line selector control line 91, the wordline selector control line 92.
Then, will illustrate that the first image reading position P1 and standard read the position relation between the P2 of position.
Standard reads position P2 and is being different from the first image reading position P1 position of (with the second image reading position P3).In the present embodiment, the first image reading position P1 and standard read position relation between the P2 of position be confirmed as making when read pixel row 68a during at the first image reading position P1 read pixel row 68k read position P2 at standard, as shown in figure 31.
Suppose to represent that with L1 the first image reading position P1 and standard read between the P2 of position along the distance of the circumferencial direction of scanning element 59, and the distance of representing (along the circumferencial direction of scanning element 59) between the adjacent read pixel row 68 with L2.In the case, distance L 1 is set to and satisfies following formula.
L1=(3n+1) L2, n representative here comprises zero positive integer.
Thus, utilize the wordline selector 70a be connected with the first row decoding line 67a, the read pixel row 68a that is positioned at the first image reading position P1 reads the image information on first of the original copy.Meanwhile, utilize the wordline selector 70b be connected with secondary series decoding line 67b, be positioned at the read pixel row 68k that standard reads position P2 and read shadow data.In this manner, can carry out reading of image information and reading of shadow data on to original copy D first simultaneously.
Then, with the relation of the position between the explanation first image reading position P1 and the second image reading position P3.
Second the second image reading position P3 that is used to read original copy D is being different from the position that the first image reading position P1 and standard read position P2.In the present embodiment, the position between the first image reading position P1 and second image reading position P3 relation be confirmed as making when read pixel row 68a during at image reading position P1 read pixel row 68m at the second image reading position P3, shown in figure 32.
Therefore, represent between the first image reading position P1 and the second image reading position P3 along the distance of the circumferencial direction of scanning element 59 with L3, and the distance of representing (along the circumferencial direction of scanning element 59) between the adjacent read pixel row 68 with L2.In the case, distance L 3 is set to and satisfies following formula.
L1=(3n+1) L2, n representative here comprises zero positive integer.
Thus, utilize the wordline selector 70a be connected with the first row decoding line 67a, the read pixel row 68a that is positioned at image reading position P1 reads the image information on first of the original copy D.Meanwhile, utilize the wordline selector 70c be connected with the 3rd row decoding line 67c, the read pixel row 68m that is positioned at the second image reading position P3 can read the image information on second of the original copy D.
Then, the read operation of ADF scan pattern will be described in detail.
When manipulation operations portion reads the instruction of original copy with generation with the ADF scan pattern,, and read position P2 at standard and obtain shadow data along original copy direction of transfer rotary scanning unit 59.At this moment, the circumferential speed of scanning element 59 is approximately equal to the transfer rate of original copy D.In addition, light lamp 41, the light transmission of this lamp 41 is between the read pixel 61 on the cylindrical element 60 of scanning element 59 and shine standard 42.
When obtaining shadow data, connect in order towards the organic transistor 61b of those read pixels 61 of the read pixel row 68 of standard 42, thereby read the current value that the organic photoelectric diode 61a by these read pixels 61 generates via relevant word line 63, wordline selector 70 and row decoding line 67.Each current value of reading is converted into shadow data in image processing part 58, and is stored in the memory (not shown) with the address date of read pixel 61.
ADF40 begins to transmit original copy D finishing when those read pixel row 68 that shadow data obtains arrive the first image reading position P1.When original copy D arrives the first image reading position P1, utilize pressing means 23 that this original copy D is contacted with the outer peripheral face of scanning element 59.At this moment, receive from the light of original copy reflection towards the organic photoelectric diode 61a of the read pixel 61 of the read pixel row 68 of original copy D, and generate the current value that changes according to the image information on this original copy D.Then, connect in order towards the organic transistor 61b of the read pixel 61 of the read pixel of original copy D row, the current value that generates in the organic photoelectric diode 61a of this read pixel 61 is read via relevant word line 63 as the signal of telecommunication thus.In image processing part 58, each signal of telecommunication of reading is comprised the various processing of shade correction.When the shade correction, the shadow data that obtains from given read pixel 61 is used as the image information that obtains from same read pixel 61.
Read in the process at image, to rotate driven sweep unit 59 with the approximately equalised circumferential speed of the transfer rate of original copy D.Therefore, read pixel 61 never moves along sub scanning direction with respect to original copy D.As a result, even on dust or the stain surface attached to original copy D or scanning element 59, the image of this dust or stain also never extends along sub scanning direction, therefore unlike the prior art, does not produce any image striped.
Finish after first of original copy D read at the first image reading position P1, utilize transfer roller 48 and distributing roller 49 transmit this original copy D until the rear end of this original copy D by breakout 31, this original copy D is temporarily stopped.Then, distributing roller 49 backward rotation, and transmit this original copy D as front end with the rear end of original copy D.When the rear end of original copy D arrives breakout 31, this original copy D is directed on the upper surface of counter-rotating baffle plate 54 and guides counter-rotating transfer path 53 into.Then, the second image reading position P3 in reading part 30 transmits original copy D.
At the second image reading position P3, utilize pressing means 55 that second outer peripheral face with scanning element 59 of original copy D contacted, transmit this original copy D simultaneously.At this moment, in the read pixel 61 of second the read pixel row 68 of original copy D, because from the light of second reflection of this original copy D, organic photoelectric diode 61a generates the current value that changes according to the image information on this original copy D.Then, connect in order towards the organic transistor 61b of the read pixel 61 of the read pixel of original copy D row, the current value that generates in the organic photoelectric diode 61a of this read pixel 61 is read via relevant word line 63 as the signal of telecommunication thus.In image processing part 58, each signal of telecommunication of reading is comprised the various processing of shade correction.
When the second image reading position P3 reads second of original copy D, read follow-up original copy D at the first image reading position P1 first.Here suppose that read pixel row 68m is at the second image reading position P3.Therefore, read pixel row 68a is at the first image reading position P1.Read to read respectively from the image information of the read pixel row 68m that is positioned at the second image reading position P3 and carry out via different row decoding line 67c and 67a with image information from the read pixel row 68a that is positioned at the first image reading position P1.As a result, can carry out simultaneously to second of given original copy D read and to first of follow-up original copy D read.
Its second face passes through transfer path 40c at the original copy D that the second image reading position P3 reads, utilizes distributing roller 49 to be discharged to then and discharges on the pallet 50.It should be noted that making original copy D is in order to adjust the stacking sequence of original copy D by transfer path 40c.
In addition, from the length of the transfer path of breakout 31 to second image reading position P3, the length of the transfer path that reads position 101 to flowing via counter-rotating transfer path 153 and transfer path 156 from counter-rotating baffle plate 152 in the comparable traditional images reading device shown in Figure 32 is short.This makes that the skewness that can reduce original copy D, this skewness are because transfer roller 46, transfer roller 48 and the relative tilt of distributing roller 49 and the vary in diameter of transfer roller cause.As a result, position deviation and the anamorphose between the image that can reduce to form based on the view data sheet that reads from first and second faces of same original copy D respectively.
As shown in figure 29, between the lamp 41 and the first image reading position P1 apart from Q1 equal between the lamp 41 and the second image reading position P3 apart from Q3.Therefore, be approximately equal to light quantity in the light quantity of first image reading position P1 irradiation original copy at the second image reading position P3.As a result, can not produce sizable mass discrepancy between the image that reads from the opposite face of every original copy D.
In addition, when make lamp 41 and standard read between the P2 of position be approximately equal to apart among Q1 and the Q3 each apart from Q2 the time, the light quantity of irradiation standard is approximately equal to the light quantity of image irradiation original copy when reading when obtaining shadow data.This makes the shadow data sheet can obtain to be suitable for the image that reads from the opposite face of every original copy D, thereby makes this two image more consistent.
Because lamp 41 is located at the inside of this cylindrical element 60 coaxially with cylindrical element 60, so be easy to make apart from Q1, Q2 and Q3 approximately equal.
As above illustrated, according to present embodiment, read first of original copy and read second of original copy D, so time for reading, especially shorten the time when many original copys are carried out two-sided reading at the second image reading position P3 at the first image reading position P1.
In addition, owing to adopt single scanning element 59 to read the opposite face of original copy,, can realize that the less high precision image of anamorphose reads so the two-sided situation about reading of original copy execution is compared with adopting two scanning elements.This is because do not have the offset and the inclination of the image that causes owing to the offset between two scanning elements.
Present embodiment adopts a kind of like this scanning element 59, and this scanning element 59 is used cylindrical element.Optionally, scanning element can be configured to adopt the endless belt.In the case, a plurality of read pixels with cells arranged in matrix on the endless belt, and along the original copy direction of transfer with this strap-like member of the approximately equalised speed drive of original copy transmission speed.
Do not break away from the spirit and scope of the present invention because obtaining many obviously general different embodiment of the present invention, what it should be understood that is, the invention is not restricted to specific embodiment, except that as limiting in the appended claims.
Claims (21)
1. image read-out comprises:
Rotating part, a plurality of optical pickocffs are located on the outer peripheral face of described rotating part, and this rotating part is along the direction extension vertical with the direction of transfer of original copy and be configured as cylindrical shape; And
Driving arrangement is used to make described rotating part to rotate, wherein:
When utilizing described driving arrangement to rotate described rotating part, read the image of the original copy that transmits along the described outer peripheral face of described rotating part by described a plurality of optical pickocffs;
Described image read-out also comprises the original copy transfer equipment that is used to transmit described original copy, and described original copy transfer equipment transmits described original copy along the described outer peripheral face of described rotating part;
Described driving arrangement makes described rotating part to rotate with the approximately equalised circumferential speed of the transfer rate of the described original copy that is transmitted by described original copy transfer equipment.
2. image read-out according to claim 1 also comprises:
Pressurized equipment makes the described original copy that is transmitted contact with the described outer peripheral face face of described rotating part.
3. image read-out according to claim 2 is characterized in that, described a plurality of optical pickocffs all have the components of photo-electric conversion and are used to accumulate the capacitor of the electric charge that is produced by the described components of photo-electric conversion,
Wherein, in at least one optical pickocff of described a plurality of optical pickocffs, the described capacitor of each described at least one optical pickocff is accumulated the electric charge by the described components of photo-electric conversion generation of each described at least one optical pickocff in the given time, described at least one optical pickocff is towards the described original copy that contacts with the described outer peripheral face face of described rotating part, and the described scheduled time is included in each described at least one optical pickocff in the time of described original copy.
4. image read-out according to claim 1 is characterized in that, described a plurality of optical pickocffs are located on the described outer peripheral face of described rotating part with matrix form.
5. image read-out according to claim 1, it is characterized in that, described a plurality of optical pickocff is arranged to a kind of like this pattern, wherein, extend and be listed in along the predetermined quantity optical pickocff that the rotating shaft direction of described rotating part is arranged on the outer peripheral face of described rotating part along main scanning direction and arrange with predetermined interval.
6. image read-out according to claim 5 also comprises:
Standard is located at image reading position and is used to obtain shade correction data,
Wherein, each the described optical pickocff that extends along described main scanning direction reads described standard when being listed in and arriving described image reading position along with the rotation of described rotating part, and finishes reading the image on the described original copy after the reading of described standard at all optical pickocffs row that extend along described main scanning direction.
7. image read-out according to claim 5 also comprises:
Standard is used to obtain shade correction data, and described standard is located at the different standard of image reading position that reads the described image on the described original copy with described a plurality of optical pickocffs and reads the position,
Wherein, each the described optical pickocff that extends along described main scanning direction is listed in to arrive along with the rotation of described rotating part and reads described standard when described standard reads the position, and reads the described image on the described original copy when arriving described image reading position.
8. image read-out according to claim 1 is characterized in that, described cylindrical circular rotating part has the base material of being made by transmission element, and the lighting apparatus that is used to shine described original copy is located in the described base material.
9. image read-out according to claim 1 is characterized in that described rotating part has the base material that forms the endless belt, and described a plurality of optical pickocff is located on the surface of described base material.
10. image read-out according to claim 9 is characterized in that, the described base material that forms described endless belt is made by the printing opacity sheet shaped piece,
Described base material is opened and is located between a pair of pulley, and
One of described a pair of pulley comprises and is used to shine the lighting apparatus of described original copy and has light transmission.
11. image read-out according to claim 10 is characterized in that, one of described at least a pair of pulley utilizes described driving arrangement rotation to drive.
12. image read-out according to claim 9 is characterized in that, the described base material that forms described endless belt is made up of the printing opacity sheet shaped piece, and end and the other end of described sheet shaped piece are bonded with each other and overlap,
In described optical pickocff row, intervenient those optical pickocff row in junction surface that a described end of described printing opacity sheet shaped piece and described the other end are stacked mutually, arrange with certain interval, the described integral multiple that is spaced apart the interval between other adjacent optical transducer, and
Carry out interpolation, definite and described junction surface corresponding image information by between the image information that obtains at one of intervenient those optical pickocffs row and the image information by another acquisition of those optical pickocff row by described junction surface.
13. image read-out according to claim 9 is characterized in that, the described base material that forms described endless belt is made up of the printing opacity sheet shaped piece, and end of described sheet shaped piece and the other end are bent and engage facing mutually, and
In described optical pickocff row, a described end and described the other end of described printing opacity sheet shaped piece is bent and engages with intervenient those optical pickocffs in opposed facing junction surface and be listed as with certain interval layout, and described interval equals the interval between other adjacent optical transducer.
14. image read-out according to claim 1 also comprises:
Standard is used to obtain shade correction data,
Wherein, described standard is configured to press to the described outer peripheral face of described rotating part, and
When utilizing described driving arrangement to rotate described rotating part, described standard is read by described a plurality of optical pickocffs.
15. image read-out according to claim 14, it is characterized in that, described a plurality of optical pickocff is arranged with matrix pattern, the line direction that described matrix pattern has the column direction that extends along the rotating shaft direction of described rotating part and extends perpendicular to the described rotating shaft direction of described rotating part, and
At least two optical pickocff row from a plurality of optical pickocff row are the reading of data sheet simultaneously, and described a plurality of optical pickocffs are listed as by the optical pickocff of being arranged to row along described column direction to be formed.
16. image read-out according to claim 14 is characterized in that, described a plurality of optical pickocffs all have the components of photo-electric conversion and are used to accumulate the capacitor of the electric charge that is produced by the described components of photo-electric conversion, and
Described a plurality of optical pickocffs at least one optical pickocff of described standard, the described capacitor of each described at least one optical pickocff is accumulated the electric charge by the described components of photo-electric conversion generation of each described at least one optical pickocff in the given time, and the described scheduled time is included in each described at least one optical pickocff in the time of described standard.
17. image read-out according to claim 1 also comprises: the original copy conveying equipment is used to carry described original copy;
The first original copy transfer equipment is used to transmit described original copy, makes the described original copy that utilizes described original copy conveying equipment to carry read first first image reading position of described original copy by described a plurality of optical pickocffs; And
The second original copy transfer equipment is used to transmit described original copy, makes the described original copy by described first image reading position read second second image reading position of described original copy by described a plurality of optical pickocffs,
Wherein, when utilizing described driving arrangement to rotate described rotating part, when described original copy utilizes described a plurality of optical pickocff to read during by described first image reading position to be positioned at image information on described first of described original copy, when described original copy reads image information on described second that is positioned at described original copy during by described second image reading position.
18. image read-out according to claim 17, it is characterized in that, described a plurality of optical pickocff is arranged with matrix pattern, the line direction that described matrix pattern has the column direction that extends along the rotating shaft direction of described rotating part and extends perpendicular to the described rotating shaft direction of described rotating part, and
At least two optical pickocff row from a plurality of optical pickocff row are the reading of data sheet simultaneously, and described a plurality of optical pickocffs are listed as by the optical pickocff of being arranged to row along described column direction to be formed.
19. image read-out according to claim 17 also comprises:
First pressurized equipment is located at described first image reading position and presses to described rotating part with handle by described first face of the described original copy of described first image reading position; And
Second pressurized equipment is located at described second image reading position and presses to described rotating part with handle by described second face of the described original copy of described second image reading position.
20. image read-out according to claim 17 is characterized in that, sees that in the direction that the rotation axis perpendicular to described rotating part extends described first image reading position and described second image reading position are faced mutually.
21. image read-out according to claim 17 is characterized in that, described first transfer equipment has first transfer path that extends to the original copy drain position via described first image reading position, and
Described second transfer equipment has second transfer path that extends to described original copy drain position from described first image reading position described first transfer path and the breakout between the described original copy drain position, via described second image reading position.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005376411A JP4533311B2 (en) | 2005-12-27 | 2005-12-27 | Image reading apparatus and image forming apparatus |
| JP376411/2005 | 2005-12-27 | ||
| JP376412/2005 | 2005-12-27 | ||
| JP2005376412A JP4509022B2 (en) | 2005-12-27 | 2005-12-27 | Image reading apparatus and image forming apparatus |
| JP376414/2005 | 2005-12-27 | ||
| JP2005376414A JP4533312B2 (en) | 2005-12-27 | 2005-12-27 | Image reading apparatus and image forming apparatus |
| PCT/JP2006/326310 WO2007074914A1 (en) | 2005-12-27 | 2006-12-22 | Image reading apparatus whith image sensors disposed at the surface of a drum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101248658A CN101248658A (en) | 2008-08-20 |
| CN101248658B true CN101248658B (en) | 2010-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006800258163A Expired - Fee Related CN101248658B (en) | 2005-12-27 | 2006-12-22 | Image reading apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4533311B2 (en) |
| CN (1) | CN101248658B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6089465B2 (en) | 2012-06-25 | 2017-03-08 | セイコーエプソン株式会社 | Image reading apparatus and recording apparatus |
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|---|---|---|---|---|
| US5057942A (en) * | 1990-04-09 | 1991-10-15 | Xerox Corporation | Electronic document scanner with a transparent imaging and drive roller |
| US6326992B1 (en) * | 1991-05-14 | 2001-12-04 | Seiko Epson Corporation | Image forming apparatus |
| WO2003055199A1 (en) * | 2001-12-21 | 2003-07-03 | Canon Kabushiki Kaisha | Sheet transport apparatus and image reading apparatus |
| CN1497381A (en) * | 2002-10-01 | 2004-05-19 | 佳能株式会社 | Image read device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6277961U (en) * | 1985-11-01 | 1987-05-19 | ||
| JPS6320954A (en) * | 1986-07-15 | 1988-01-28 | Oki Electric Ind Co Ltd | Reading sensor |
| JPS6415970A (en) * | 1987-07-09 | 1989-01-19 | Canon Kk | Image reading equipment |
| JPS6420770A (en) * | 1987-07-15 | 1989-01-24 | Ricoh Kk | Unmagnification sensor |
| JPS6457871A (en) * | 1987-08-28 | 1989-03-06 | Hitachi Ltd | Image sensor |
| JPH04326244A (en) * | 1991-04-25 | 1992-11-16 | Ricoh Elemex Corp | Original reader |
| JP2001245102A (en) * | 2000-02-28 | 2001-09-07 | Canon Inc | Reading sensor, image reader and image processing equipment |
| JP2001298583A (en) * | 2000-04-13 | 2001-10-26 | Minolta Co Ltd | Image sensor |
| JP2002247294A (en) * | 2001-02-20 | 2002-08-30 | Fuji Xerox Co Ltd | Original reader |
| JP2004166223A (en) * | 2002-09-26 | 2004-06-10 | Sharp Corp | Contact type area sensor |
| JP4032176B2 (en) * | 2002-11-13 | 2008-01-16 | コニカミノルタホールディングス株式会社 | Image input device and display medium |
| JP2005115661A (en) * | 2003-10-08 | 2005-04-28 | Matsushita Electric Ind Co Ltd | Image read and display device |
-
2005
- 2005-12-27 JP JP2005376411A patent/JP4533311B2/en not_active Expired - Fee Related
-
2006
- 2006-12-22 CN CN2006800258163A patent/CN101248658B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5057942A (en) * | 1990-04-09 | 1991-10-15 | Xerox Corporation | Electronic document scanner with a transparent imaging and drive roller |
| US6326992B1 (en) * | 1991-05-14 | 2001-12-04 | Seiko Epson Corporation | Image forming apparatus |
| WO2003055199A1 (en) * | 2001-12-21 | 2003-07-03 | Canon Kabushiki Kaisha | Sheet transport apparatus and image reading apparatus |
| CN1497381A (en) * | 2002-10-01 | 2004-05-19 | 佳能株式会社 | Image read device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4533311B2 (en) | 2010-09-01 |
| JP2007180842A (en) | 2007-07-12 |
| CN101248658A (en) | 2008-08-20 |
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