CN102404515A - Image sensing device - Google Patents
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- CN102404515A CN102404515A CN2010102827006A CN201010282700A CN102404515A CN 102404515 A CN102404515 A CN 102404515A CN 2010102827006 A CN2010102827006 A CN 2010102827006A CN 201010282700 A CN201010282700 A CN 201010282700A CN 102404515 A CN102404515 A CN 102404515A
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Abstract
An image sensing device comprises a light sensing face and a displacement module. The light sensing face is provided with a plurality of pixel blocks in matrix arrangement. Each pixel block generates a first base color signal, a second base color signal, a third base color signal and a fourth base color signal according to intensity of received light. The displacement module is provided with a first output end and a second output end. The displacement module receives the first base color signals, the second base color signals, the third base color signals and the fourth base color signals, and outputs one of the third base color signals and one of the fourth base color signals at the second output end. Every third base color signal and every fourth base color signal are two corresponding signals with the same colored light.
Description
Technical field
The present invention relates to a kind of photo-sensitive cell, particularly relate to a kind of Image sensor apparatus.
Background technology
Along with the progress of semiconductor and photoelectric technology, there are increasing digital camera, data monitor or digital camera etc. to be full of in the middle of life at present.Cameras such as digital camera, data monitor or digital camera need photo-sensitive cell to convert the light signal that is sensed into electric signal output to use for the image processing of rear end.
Generally speaking, photo-sensitive cell be mostly charge coupled cell (charge coupled device, CCD).Because the transmission speed of traditional single pass charge coupled cell is slower; Can't meet the need of market; A kind of twin-channel charge coupled cell so develop now, wherein the transmission speed of twin-channel charge coupled cell is the twice of single pass charge coupled cell.Yet,, will cause image to produce severe noise if the back-end circuit of charge coupled cell has a little not matching on technology.
Summary of the invention
The present invention provides a kind of Image sensor apparatus, can reduce the image noise that does not match and caused because of back-end circuit.
The present invention proposes a kind of Image sensor apparatus, comprises a light sensing face and a shift module.The light sensing face disposes the block of pixels of a plurality of arranged.Each block of pixels is according to receiving luminous intensity to produce one first primary colours signal, one second primary colours signal, a three primary colors signal and one the 4th primary colours signal.Shift module has one first output and one second output.Shift module receives the first primary colours signal, two primary colours signals, three primary colors signal and the 4th primary colours signal, and exports the one of which of three primary colors signal and the one of which of the 4th primary colours signal in second output.Each three primary colors signal is two signals of corresponding identical coloured light with each the 4th primary colours signal.
In one embodiment of this invention, above-mentioned shift module is also exported the one of which of the first primary colours signal and the one of which of the second primary colours signal in first output.
In one embodiment of this invention; Each block of pixels comprises one first pixel sensing cell, one second pixel sensing cell, one the 3rd pixel sensing cell and one the 4th pixel sensing cell, to produce the first corresponding primary colours signal, the second corresponding primary colours signal, corresponding three primary colors signal and the 4th corresponding primary colours signal respectively.
In one embodiment of this invention, interconnected (2i-1) in the light sensing face of first above-mentioned pixel sensing cell and the 3rd pixel sensing cell OK, and interconnected (2i) in the light sensing face of the second pixel sensing cell and the 4th pixel sensing cell is OK.The 4th pixel sensing cell of the 3rd pixel sensing cell of (2i-1) row and (2i) row is positioned at different lines, and 1≤2i≤2N and i, N are the positive integer more than or equal to 1.
In one embodiment of this invention, above-mentioned shift module comprises a plurality of shift registers and a switching unit.Corresponding respectively first primary colours signal and the three primary colors signal that receives (2i-1) row of shift register.Shift register is serial connection, and displacement first primary colours signal and the three primary colors signal that continue is with the one of which of exporting the first primary colours signal and the one of which of three primary colors signal.Switch unit couples shift register, receives the corresponding first primary colours signal and corresponding three primary colors signal, and exports first primary colours signal and the three primary colors signal that is received respectively in first output and second output of shift module.
In one embodiment of this invention, above-mentioned shift register is also distinguished corresponding the 4th primary colours signal and the second primary colours signal that receives (2i) row.Shift register continue displacement the 4th primary colours signal and the second primary colours signal, and export the one of which of the 4th primary colours signal and the one of which of the second primary colours signal.Switch unit receives corresponding the 4th primary colours signal and the second corresponding primary colours signal, and exports the second primary colours signal and the 4th primary colours signal that is received respectively in first output and second output of shift module.
In one embodiment of this invention, above-mentioned shift module comprises a plurality of switch units and a plurality of shift register.Each switch unit has a first input end, one second input, one the 3rd output and one the 4th output.First input end receives the first primary colours signal of (2i-1) row and exports the first primary colours signal in the 3rd output.Second input receives the three primary colors signal of (2i-1) row and exports the three primary colors signal in the 4th output.The one of which of corresponding respectively the 3rd output that couples of each shift register or the one of which of the 4th output.Shift register is serial connection, and displacement first primary colours signal and the three primary colors signal that continue, and exports the one of which of the first primary colours signal and the one of which of three primary colors signal respectively with first output and second output in shift module.
In one embodiment of this invention, above-mentioned first input end also receives the 4th primary colours signal of (2i) row, and exports the 4th primary colours signal in the 4th output.Second input also receives the second primary colours signal of (2i) row, and exports the second primary colours signal in the 3rd output.Shift register continue displacement second primary colours signal and the 4th primary colours signal are with the one of which of exporting the second primary colours signal respectively in first output and second output of shift module and the one of which of the 4th primary colours signal.
In one embodiment of this invention, above-mentioned shift module comprises one first shift unit and one second shift unit.First shift unit comprises a plurality of first shift registers.Corresponding respectively first primary colours signal and the three primary colors signal that receives (2i-1) row of first shift unit, wherein first shift register is serial connection, and displacement first primary colours signal and the three primary colors signal that continue.Second shift unit couples first shift unit, and receives the one of which of the first primary colours signal or the one of which of three primary colors signal.Second shift unit is exported first primary colours signal and the three primary colors signal that is received according to a controlling signal respectively in first output and second output of shift module.
In one embodiment of this invention, also corresponding respectively the 4th primary colours signal and the second primary colours signal that receives (2i) row of the first above-mentioned shift register, and continue displacement the 4th primary colours signal and the second primary colours signal.In addition; Second shift unit also receives the one of which of the 4th primary colours signal or the one of which of the second primary colours signal; And the 4th primary colours signal that is received in second output output of displacement handover module shift module according to controlling signal, or export the second primary colours signal and the 4th primary colours signal that is received respectively in first output and second output of displacement handover module shift module.
In one embodiment of this invention, the second above-mentioned shift unit comprises two second shift registers of serial connection each other.Shift register is exported first primary colours signal and the three primary colors signal according to controlling signal respectively in a very first time.
In one embodiment of this invention; The second above-mentioned shift unit according to controlling signal at the reset signal of one of which of second shift register of one second time; And export the 4th primary colours signal, and export the 4th primary colours signal and the second primary colours signal respectively at first output and second output of handover module in one the 3rd time in second output.
In one embodiment of this invention, above-mentioned second shift unit is to export the 4th primary colours signal through another of second shift register in the 3rd time.
In one embodiment of this invention, the second pixel sensing cell of above-mentioned (2i) row couples first pixel sensing cell of (2i-1) row and the first pixel sensing cell that couples (2i+1) row respectively respectively, and forms a plurality of first sensing serial.
In one embodiment of this invention, the first pixel sensing cell that coupled of first pixel sensing cell of above-mentioned (2i) row is positioned at same row.
In one embodiment of this invention, the 4th pixel sensing cell of above-mentioned (2i) row couples the 3rd pixel sensing cell of (2i-1) row and the 3rd pixel sensing cell that couples (2i+1) row respectively respectively, and forms a plurality of second sensing serial.
In one embodiment of this invention, the 3rd pixel sensing cell that coupled of the 4th pixel sensing cell of above-mentioned (2i) row is positioned at same row.
In one embodiment of this invention, above-mentioned shift module comprises a plurality of first shift registers and a plurality of second shift register.The first shift register correspondence couples first sensing serial, to receive the one of which of the first primary colours signal.A plurality of second shift register correspondences couple second sensing serial, to receive the one of which of three primary colors signal.First shift register is connected in series with second shift register is staggered; And displacement first primary colours signal and the three primary colors signal that continue, so that shift module is exported the one of which of the first primary colours signal and the one of which of three primary colors signal respectively in first output and second output.
In one embodiment of this invention, the first above-mentioned shift register also receives the one of which of the second primary colours signal, and second shift register also receives the one of which of the 4th primary colours signal.First shift register and second shift register continue displacement second primary colours signal and the 4th primary colours signal are so that shift module is exported the one of which of the second primary colours signal and the one of which of the 4th primary colours signal respectively in first output and second output.
In one embodiment of this invention, each above-mentioned first primary colours signal is two signals of corresponding different color light with each second primary colours signal.
Based on above-mentioned, embodiments of the invention are by adopting shift module that two signals of the identical coloured light of correspondence are exported in same output, so can lower the gain of the back-end circuit image noise that causes that do not match.
For letting the above-mentioned feature and advantage of the present invention can be more obviously understandable, hereinafter is special lifts embodiment, and cooperates appended graphic elaborating as follows.
Description of drawings
Fig. 1 is the sketch map of the Image sensor apparatus of second embodiment of the invention.
Fig. 2 is the sketch map of the Image sensor apparatus of second embodiment of the invention.
Fig. 3 is the sketch map of the Image sensor apparatus of third embodiment of the invention.
Fig. 4 A is the sketch map of the Image sensor apparatus of fourth embodiment of the invention.
Fig. 4 B is the circuit rough schematic view of Fig. 4 A.
The reference numeral explanation
100,200,300,400: Image sensor apparatus
110: the light sensing face
112: the virtual pixel sensing cell
120,220,320,420: shift module
122,126,224,322a, 322b, 324a, 324b, 422,424: shift register
124,222: switch unit
132,134: output buffer
322,324: shift unit
P: block of pixels
S1～S4: primary colours signal
OP1～OP4: output
R, B, Gr, Gb: pixel sensing cell
IP1～IP4: input
CRL: controlling signal
412,414: sensing serial
Embodiment
In following embodiment, will (charge coupled device CCD) as exemplary embodiment, it will be apparent to those skilled in the art that this charge coupled cell is not in order to limit Image sensor apparatus of the present invention with charge coupled cell.Any have a category that the electronic installation that converts the light signal that senses the function of electric signal into is all institute of the present invention desire protection.
First embodiment
Fig. 1 is the sketch map of the Image sensor apparatus 100 of first embodiment of the invention.Please with reference to Fig. 1, Image sensor apparatus 100 comprises a light sensing face 110 and a shift module 120, and wherein Image sensor apparatus 100 for example is a charge coupled cell.Dispose the block of pixels P of a plurality of arranged on the light sensing face 110, each block of pixels P is according to receiving luminous intensity to produce primary colours signal S1, primary colours signal S2, primary colours signal S3 and primary colours signal S4.
In detail, each block of pixels P for example comprises pixel sensing cell R, pixel sensing cell B, pixel sensing cell Gr and pixel sensing cell Gb, to produce corresponding primary colours signal S1, primary colours signal S2, primary colours signal S3 and primary colours signal S4 respectively.Furthermore; Pixel sensing cell R for example produces the primary colours signal S1 of corresponding ruddiness; Pixel sensing cell B for example produces the primary colours signal S2 of corresponding blue light, and pixel sensing cell Gr and pixel sensing cell Gb for example produce the primary colours signal S3 and the S4 of corresponding green glow.Generally speaking; Because human eye is comparatively sharp for green glow; So at the pixel sensing cell Gr, the Gb that in each block of pixels P, dispose two corresponding green glows in the configuration of light sensing face 110 usually; Wherein pixel sensing cell Gr, Gb are the diagonal angle configuration, and produce primary colours signal S3, the S4 of corresponding green glow respectively.
As shown in Figure 1; Interconnected (2i-1) in light sensing face 110 of the pixel sensing cell R of present embodiment and pixel sensing cell Gr OK; And interconnected (2i) in light sensing face 110 of pixel sensing cell B and pixel sensing cell Gb OK; Wherein the pixel sensing cell Gb of the pixel sensing cell Gr of (2i-1) row and (2i) row is positioned at different lines, and 1≤2i≤2N and i, N are the positive integer more than or equal to 1.For example; When N=4; The odd-numbered line of interconnected the 1st, 3,5,7 row in light sensing face 110 of pixel sensing cell R and pixel sensing cell Gr, and pixel sensing cell B and pixel sensing cell Gb are interconnected in the 2nd, 4,6,8 even number line of light sensing face 110.In other words, the pixel sensing cell R in the block of pixels P, Gr are positioned at different adjacent two row with pixel sensing cell B, Gb.
On the other hand, the shift module 120 of present embodiment comprises a plurality of shift registers 122 and a switching unit 124.Switch unit 124 couples shift register 122, and for example is a switching circuit (switch circuit).Shift register 122 is corresponding respectively to receive the primary colours signal S1 and the primary colours signal S3 of (2i-1) row (for example the 1st, 3,5...2N-1 capable).Shift register 122 is serial connection, and continue displacement primary colours signal S1 and primary colours signal S3, with the one of which of output primary colours signal S1 and the one of which of primary colours signal S3.
In detail, the primary colours signal S3 that the pixel sensing cell Gr of the primary colours signal S1 that the pixel sensing cell R of (2i-1) row is produced and (2i-1) row is produced is sent to shift module 120 by past y direction in regular turn, and deposits in the shift register 122.Then, shift register 122 is toward x directions continue displacement primary colours signal S1 and primary colours signal S3, with output primary colours signal S1 and primary colours signal S3 to switch unit 124.Switch unit 124 receives corresponding primary colours signal S1 and corresponding primary colours signal S3, and exports primary colours signal S1 and the primary colours signal S3 that is received respectively in the output OP1 and the output OP2 of shift module 120.
In addition, also respectively corresponding primary colours signal S4 and the primary colours signal S2 that receives (2i) row (for example be the 2nd, 4,6...2N capable) of shift register 122.Shift register 122 continue displacement primary colours signal S4 and primary colours signal S2, and the one of which of output primary colours signal S4 and the one of which of primary colours signal S2.Then, switch unit 124 receives corresponding primary colours signal S4 and corresponding primary colours signal S2, and exports primary colours signal S2 and the primary colours signal S4 that is received respectively in the output OP1 and the output OP2 of shift module 120.
Similarly, the primary colours signal S2 that the pixel sensing cell B of the primary colours signal S4 that the pixel sensing cell Gb of (2i) row is produced and (2i) row is produced is sent to shift module 120 by past y direction in regular turn, and deposits in the shift register 122.Then, shift register 122 is toward x directions continue displacement primary colours signal S4 and primary colours signal S2, with output primary colours signal S4 and primary colours signal S2 to switch unit 124.So switch unit 124 receives corresponding primary colours signal S4 and corresponding primary colours signal S2, and exports primary colours signal S2 and the primary colours signal S4 that is received respectively in the output OP1 and the output OP2 of shift module 120.
In addition, in the present embodiment, also dispose a plurality of virtual pixel sensing cells 112 on the light sensing face 110, the both sides of virtual pixel sensing cell 112 configuration sensing face 110 wherein, and block of pixels P is between virtual pixel sensing cell 112.On the other hand, the shift module 120 of present embodiment also comprises a plurality of shift registers 126, and wherein shift register 126 is coupled between virtual pixel sensing cell 112 and the switch unit 124, and is connected in series with shift register 122.
In addition, as shown in Figure 1, the output OP1 of present embodiment, OP2 for example are coupled to output buffer 132,134 respectively, and wherein output buffer 132,134 is in order to drive the driving force of back-end circuit.Generally speaking, output buffer 132,134 is subject to technogenic influence and the unmatched problem that gains is to each other arranged.Therefore, if primary colours signal S3, the S4 of corresponding identical coloured light exported output buffer to through different output OP1, OP2 respectively, will cause image serious noise not occur at 132,134 o'clock because of the gain of output buffer 132,134 matches.
For avoiding the problems referred to above; Present embodiment is delivered to the primary colours signal S3 of the identical coloured light of correspondence and primary colours signal S4 with an output buffer (for example output buffer 134) eliminating the unmatched problem of above-mentioned gain through identical output OP2 by switch unit 124, and then can avoid the noise of image.
For example; When primary colours signal S1 and primary colours signal S3 for example deliver to input IP1, the IP2 of switch unit 124 through virtual pixel sensing cell 112; Switch unit 124 can be sent to output OP1 with the primary colours signal S1 of input IP1, and the primary colours signal S3 of input IP2 is sent to output OP2.
On the other hand; When primary colours signal S4 and primary colours signal S2 for example deliver to input IP1, the IP2 of switch unit 124 through virtual pixel sensing cell 112; Switch unit 124 can be sent to output OP2 with the primary colours signal S4 of input IP1, and the primary colours signal S2 of input IP2 is sent to output OP1.Thus, the primary colours signal S3 of corresponding identical coloured light and primary colours signal S4 just can be from exporting with an output OP2, to overcome the problem that does not match and caused between posterior member (for example output buffer 132,134).It should be noted that among other embodiment, the primary colours signal S3 of corresponding identical coloured light and primary colours signal S4 also can be by output OP1 outputs, and primary colours signal S1, S2 are exported by output OP2.
In addition, in another embodiment, output OP1, OP2 rear end also can be coupled to respectively an analog-digital converter (analog-to-digital converter, ADC), to carry out analog digital conversion.Generally speaking, carrying out analog digital when conversion, also be prone to because of the difference of the characteristic of analog-digital converter difference to some extent from the signal of analog-digital converter output.Yet, in this example, because switch unit 124 can pass through identical output (for example output OP2) output with primary colours signal S4 with the primary colours signal S3 of the identical coloured light of correspondence, so the problem that is produced that do not match of back-end circuit just can be eliminated effectively.
Second embodiment
Fig. 2 is the sketch map of the Image sensor apparatus 200 of second embodiment of the invention.The Image sensor apparatus 200 of present embodiment is similar with the Image sensor apparatus 100 of Fig. 1, and the two main difference part is: shift module 220 is different with the shift module 120 of Fig. 1.
Please with reference to Fig. 2, the shift module 220 of present embodiment comprises a plurality of switch units 222 and a plurality of shift registers 224.Each switch unit 222 has input IP3, input IP4, output OP3 and output OP4.Input IP3 receives primary colours signal S1 that the pixel sensing cell R of (2i-1) row produced and in output OP3 output primary colours signal S1, and input IP4 receives primary colours signal S3 that the pixel sensing cell Gr of (2i-1) row produced and in output OP4 output primary colours signal S3.
On the other hand, each shift register 224 respectively correspondence couple output OP3 or output OP4.Shift register 224 is serial connection, and continue displacement primary colours signal S1 and primary colours signal S3, the one of which of exporting primary colours signal S1 respectively with output OP1 and output OP2 in shift module 220 and the one of which of primary colours signal S3.
In addition; Input IP3 also receives the primary colours signal S4 that produced of pixel sensing cell Gb of (2i) row and in output OP4 output primary colours signal S4, and input IP4 also receives primary colours signal S2 that pixel sensing cell B of (2i) row produced and in output OP3 output primary colours signal S2.Then, shift register 224 continue displacement primary colours signal S2 and primary colours signal S4, the one of which of exporting primary colours signal S2 respectively with output OP1 and output OP2 and the one of which of primary colours signal S4 in shift module 220.In other words, present embodiment is to switch the outgoing position of the direction of transfer of primary colours signal S4 and S2 with change primary colours signal S4 and S2 prior to switch unit 222, carries out the action of displacement again in shift register 224.
From the above; Present embodiment is by control switch unit 222; Can the primary colours signal S3 of the identical coloured light of correspondence be delivered to an output buffer (for example output buffer 134) or all the other back-end circuit through identical output OP2 with primary colours signal S4, so can eliminate the image noise that gain does not match and caused.It should be noted; The present invention is not limited to this; In other embodiments, also can deliver to an output buffer (for example output buffer 132) or all the other back-end circuit through identical output OP1 with primary colours signal S4 by the primary colours signal S3 of control switch unit 222 with the identical coloured light of correspondence.
The 3rd embodiment
Fig. 3 is the sketch map of the Image sensor apparatus 300 of third embodiment of the invention.The Image sensor apparatus 300 of present embodiment is similar with the Image sensor apparatus 100 of Fig. 1, and the two main difference part is: shift module 320 is different with the shift module 120 of Fig. 1.
Please with reference to Fig. 3, the shift module 320 of present embodiment comprises shift unit 322 and shift unit 324.Shift unit 322 comprises a plurality of shift register 322a.The primary colours signal S3 that primary colours signal S1 that the corresponding respectively pixel sensing cell R that receives (2i-1) row of above-mentioned shift register 322a is produced and pixel sensing cell Gr are produced.Shift register 322a is serial connection, and continue displacement primary colours signal S1 and primary colours signal S3.
Shift unit 324 couples shift unit 322, and receives the one of which of primary colours signal S1 or the one of which of primary colours signal S3.Shift unit 324 is exported primary colours signal S1 and the primary colours signal S3 that is received according to a controlling signal CRL respectively in the output OP1 and the output OP2 of shift module 320.
On the other hand; The primary colours signal S2 that primary colours signal S4 that the also corresponding respectively pixel sensing cell Gb that receives (2i) row of shift register 322a is produced and pixel sensing cell B are produced; And continue displacement primary colours signal S4 and primary colours signal S2, so that shift unit 324 receptions are from the one of which of the primary colours signal S4 of shift unit 322 or the one of which of primary colours signal S2.Shift unit 324 is exported the primary colours signal S4 that is received according to controlling signal CRL in the output OP2 of shift module 320, or exports primary colours signal S2 and the primary colours signal S4 that is received respectively in the output OP1 and the output OP2 of shift module 320.
In detail, shift unit 324 comprises two shift register 324a, the 324b of serial connection each other.Shift register 324b, 324a export primary colours signal S1, S3 according to controlling signal CRL respectively in a very first time.For example; When shift register 324b, 324a received primary colours signal S1 and primary colours signal S3 respectively, shift unit 324 can be exported primary colours signal S1 and the primary colours signal S3 that is received respectively in the output OP1 and the output OP2 of shift module 320 according to controlling signal CRL.
In addition; Shift unit 324 is also according to the signal of controlling signal CRL at one second time replacement shift register 324b; And in output OP2 output primary colours signal S4, and export primary colours signal S3 and primary colours signal S4 respectively at output OP1 and output OP2 in one the 3rd time.In the present embodiment, shift unit 324 is in the 3rd time output primary colours signal S4 through shift register 324a.
In detail; When shift register 324a receives the corresponding primary colours signal S4 that is produced with the pixel sensing cell Gb of delegation first; Shift unit 324 is understood according to the signal of controlling signal CRL at second time replacement shift register 324b, and in output OP2 output primary colours signal S4.Then; When shift register 324b, 324a received reception primary colours signal S2 and primary colours signal S4 respectively next time, shift unit 324 can be exported primary colours signal S2 and the primary colours signal S4 that is received in the 3rd time respectively in the output OP1 and the output OP2 of shift module 320 according to controlling signal CRL.
In other words; Present embodiment is by SECO shift module 220 to be delivered to the primary colours signal S3 of the identical coloured light of correspondence with an output buffer (for example output buffer 134) or all the other back-end circuit through identical output OP2 with primary colours signal S4, so can eliminate the image noise that gains and do not match and caused.
In addition, in another embodiment, shift module 320 also can be exported primary colours signal S3, the S4 of corresponding identical coloured light in output OP1.For example; When shift register 324b, 324a received primary colours signal S4 and primary colours signal S2 respectively, shift unit 324 also can be exported primary colours signal S4 and the primary colours signal S2 that is received in the very first time respectively in the output OP1 and the output OP2 of shift module 320 according to controlling signal CRL.
In addition; When shift register 324a receives the corresponding primary colours signal S1 that is produced with the pixel sensing cell R of delegation first; Shift unit 324 also can be according to the signal of controlling signal CRL at second time replacement shift register 324b, and in output OP1 output primary colours signal S1.Then; When shift register 324b, 324a received reception primary colours signal S3 and primary colours signal S1 respectively next time, shift unit 324 can be exported primary colours signal S3 and the primary colours signal S1 that is received in the 3rd time respectively in the output OP1 and the output OP2 of shift module 320 according to controlling signal CRL.Thus, shift module 320 just can be by SECO in primary colours signal S3, the S4 that can export corresponding identical coloured light in output OP1.
The 4th embodiment
Fig. 4 A is the sketch map of the Image sensor apparatus 400 of fourth embodiment of the invention, and Fig. 4 B is the circuit rough schematic view of Fig. 4 A.The Image sensor apparatus 400 of present embodiment is similar with the Image sensor apparatus 100 of Fig. 1, and the two main difference part is: the line connection of line connection between the pixel sensing cell R of present embodiment, B, Gr, Gb and the pixel sensing cell R of Fig. 1, B, Gr, Gb is different.
In detail, in the present embodiment, the pixel sensing cell B of (2i) row couples pixel sensing cell R of (2i-1) row and the pixel sensing cell R that couples (2i+1) row respectively respectively, and forms a plurality of sensing serial 412 shown in Fig. 4 B.In addition, shown in Fig. 4 A, the pixel sensing cell R that the pixel sensing cell B of (2i) row is coupled is positioned at same row.For instance, the pixel sensing cell B of the 2nd row the 4th row couples the pixel sensing cell R of the 1st row the 3rd row and the 3rd row the 3rd row respectively.
In addition, the pixel sensing cell Gb of (2i) row couples pixel sensing cell Gr of (2i-1) row and the pixel sensing cell Gr that couples (2i+1) row respectively respectively, and forms a plurality of sensing serial 414 shown in Fig. 4 B.In addition, shown in Fig. 4 A, the pixel sensing cell Gb that the pixel sensing cell Gb of (2i) row is coupled is positioned at same row.For instance, the pixel sensing cell Gb of the 2nd row the 3rd row couples the pixel sensing cell Gr of the 1st row the 2nd row and the 3rd row the 2nd row respectively.
Please with reference to Fig. 4 B, the shift module 420 of present embodiment comprises a plurality of shift registers 422 and a plurality of shift register 424.Shift register 422 correspondences couple sensing serial 412 to receive the primary colours signal S1 that pixel sensing cell R is produced.Shift register 422 correspondences couple sensing serial 414, to receive the primary colours signal S3 that pixel sensing cell Gr is produced.Wherein shift register 422 and shift register 424 staggered serial connections, and continue displacement primary colours signal S1, S3 are so that shift module 420 is exported primary colours signal S1 and primary colours signal S3 respectively in output OP1 and output OP2.
On the other hand, shift register 422 also receives the primary colours signal S2 that pixel sensing cell Gr is produced, and shift register 424 also receives the primary colours signal S4 that plain sensing cell Gb is produced.Shift register 422 and 424 continues displacement primary colours signal S2, S4 so that shift module 420 is exported primary colours signal S2 and primary colours signal S4 respectively in output OP1 and output OP2.
From the above; Present embodiment is that the circuit between pixel sensing cell R, B, Gr, Gb connects on the Image sensor apparatus 400 by changing; So can the primary colours signal S3 of the identical coloured light of correspondence be delivered to an output buffer (for example output buffer 134) or all the other back-end circuit through identical output OP2 with primary colours signal S4, and then can eliminate the image noise that gain does not match and caused.It should be noted; In other embodiments; Also can connect, the primary colours signal S3 that answers identical coloured light is delivered to an output buffer (for example output buffer 132) or all the other back-end circuit through identical output OP1 with primary colours signal S4 by the circuit that changes between pixel sensing cell R, B, Gr, Gb.
In sum, embodiments of the invention are by adopting shift module that two signals of the identical coloured light of correspondence are exported in same output, so can lower the gain of the back-end circuit image noise that causes that do not match.
Though the present invention discloses as above with embodiment; Right its is not in order to limit the present invention; Those skilled in the art can do some changes and retouching under the premise without departing from the spirit and scope of the present invention, so protection scope of the present invention is to be as the criterion with claim of the present invention.
Claims (20)
1. Image sensor apparatus comprises:
One light sensing face disposes the block of pixels of a plurality of arranged, and each block of pixels is according to receiving luminous intensity to produce one first primary colours signal, one second primary colours signal, a three primary colors signal and one the 4th primary colours signal; And
One shift module; Have one first output and one second output; This shift module receives the said first primary colours signal, said two primary colours signals, said three primary colors signal and said the 4th primary colours signal; And export the one of which of said three primary colors signal and the one of which of said the 4th primary colours signal in this second output, wherein each three primary colors signal is two signals of corresponding identical coloured light with each the 4th primary colours signal.
2. Image sensor apparatus as claimed in claim 1, wherein this shift module is also exported the one of which of the said first primary colours signal and the one of which of the said second primary colours signal in this first output.
3. Image sensor apparatus as claimed in claim 1; Wherein each block of pixels comprises one first pixel sensing cell, one second pixel sensing cell, one the 3rd pixel sensing cell and one the 4th pixel sensing cell, to produce the first corresponding primary colours signal, the second corresponding primary colours signal, corresponding three primary colors signal and the 4th corresponding primary colours signal respectively.
4. Image sensor apparatus as claimed in claim 2; Interconnected (2i-1) in this light sensing face of wherein said first pixel sensing cell and said the 3rd pixel sensing cell OK; And interconnected (2i) in this light sensing face of said second pixel sensing cell and said the 4th pixel sensing cell OK; Wherein said the 4th pixel sensing cell of said the 3rd pixel sensing cell of (2i-1) row and (2i) row is positioned at different lines, and 1≤2i≤2N and i, N are the positive integer more than or equal to 1.
5. Image sensor apparatus as claimed in claim 4, wherein this shift module comprises:
A plurality of shift registers; Corresponding respectively said first primary colours signal and the said three primary colors signal that receives (2i-1) row; Wherein said shift register is serial connection; And said first primary colours signal of the displacement that continues and said three primary colors signal, with the one of which of exporting the said first primary colours signal and the one of which of said three primary colors signal; And
One switching unit couples this shift register, receives the corresponding first primary colours signal and corresponding three primary colors signal, and exports this first primary colours signal and this three primary colors signal that is received respectively in first output and this second output of this shift module.
6. Image sensor apparatus as claimed in claim 5; Also corresponding respectively said the 4th primary colours signal and the said second primary colours signal that receives (2i) row of wherein said shift register; Said shift register continue said the 4th primary colours signal of displacement and the said second primary colours signal; And export the one of which of said the 4th primary colours signal and the one of which of the said second primary colours signal; And this switch unit receives corresponding the 4th primary colours signal and the second corresponding primary colours signal, and exports this second primary colours signal and the 4th primary colours signal that is received respectively in this first output and this second output of this shift module.
7. Image sensor apparatus as claimed in claim 4, wherein this shift module comprises:
A plurality of switch units; Each switch unit has a first input end, one second input, one the 3rd output and one the 4th output; Wherein said first input end receives the said first primary colours signal of (2i-1) row and exports the said first primary colours signal in said the 3rd output, and said second input receives the said three primary colors signal of (2i-1) row and exports said three primary colors signal in said the 4th output; And
A plurality of shift registers; The one of which of corresponding respectively said the 3rd output that couples of each shift register or the one of which of said the 4th output; Wherein said shift register is serial connection; And said first primary colours signal of the displacement that continues and said three primary colors signal, export the one of which of the said first primary colours signal and the one of which of said three primary colors signal respectively with this first output and this second output in this shift module.
8. Image sensor apparatus as claimed in claim 7; Wherein, Wherein said first input end also receives said the 4th primary colours signal of (2i) row and exports said the 4th primary colours signal in said the 4th output; And said second input also receives the said second primary colours signal of (2i) row and exports the said second primary colours signal in said the 3rd output; Said shift register continue said second primary colours signal of displacement and said the 4th primary colours signal are exported the one of which of the said second primary colours signal and the one of which of said the 4th primary colours signal respectively with this first output and this second output in this shift module.
9. Image sensor apparatus as claimed in claim 4, wherein this shift module comprises:
One first shift unit; Comprise a plurality of first shift registers; Corresponding respectively said first primary colours signal and the said three primary colors signal that receives (2i-1) row, wherein said first shift register is serial connection, and said first primary colours signal of the displacement that continues and said three primary colors signal; And
One second shift unit; Couple this first shift unit; Receive the one of which of the said first primary colours signal or the one of which of said three primary colors signal, and export this first primary colours signal and this three primary colors signal that is received respectively in this first output and this second output of this shift module according to a controlling signal.
10. Image sensor apparatus as claimed in claim 9; Also corresponding respectively said the 4th primary colours signal and the said second primary colours signal that receives (2i) row of wherein said first shift register, and said the 4th primary colours signal of the displacement that continues and the said second primary colours signal; And
This second shift unit also receives the one of which of said the 4th primary colours signal or the one of which of the said second primary colours signal; And the 4th primary colours signal that is received in this second output output of this shift module according to this controlling signal, or export this second primary colours signal and the 4th primary colours signal that is received respectively in this first output and this second output of this shift module.
11. Image sensor apparatus as claimed in claim 10; Wherein this second shift unit comprises two second shift registers of serial connection each other, and said shift register is exported this first primary colours signal and this three primary colors signal according to this controlling signal respectively in a very first time.
12. Image sensor apparatus as claimed in claim 11; Wherein this second shift unit according to this controlling signal at the reset signal of one of which of said second shift register of one second time; And in this second output output the 4th primary colours signal of this handover module, and export the 4th primary colours signal and this second primary colours signal respectively at this first output of this handover module with this second output in one the 3rd time.
13. Image sensor apparatus as claimed in claim 12, this second shift unit are in the 3rd time output the 4th primary colours signal through another of said second shift register.
14. Image sensor apparatus as claimed in claim 4; Wherein the said second pixel sensing cell of (2i) row couples said first pixel sensing cell of (2i-1) row and the said first pixel sensing cell that couples (2i+1) row respectively respectively, and forms a plurality of first sensing serial.
15. Image sensor apparatus as claimed in claim 14, the said first pixel sensing cell that the said first pixel sensing cell that wherein (2i) is capable is coupled is positioned at same row.
16. Image sensor apparatus as claimed in claim 14; Wherein said the 4th pixel sensing cell of (2i) row couples said the 3rd pixel sensing cell of (2i-1) row and said the 3rd pixel sensing cell that couples (2i+1) row respectively respectively, and forms a plurality of second sensing serial.
17. Image sensor apparatus as claimed in claim 16, said the 3rd pixel sensing cell that said the 4th pixel sensing cell that wherein (2i) is capable is coupled is positioned at same row.
18. Image sensor apparatus as claimed in claim 16, wherein this shift module comprises:
A plurality of first shift registers, correspondence couple said first sensing serial, to receive the one of which of the said first primary colours signal; And
A plurality of second shift registers; Correspondence couples said second sensing serial; To receive the one of which of said three primary colors signal; Wherein said first shift register is connected in series with said second shift register is staggered, and said first primary colours signal of the displacement that continues and said three primary colors signal, so that this shift module is exported the one of which of the said first primary colours signal and the one of which of said three primary colors signal respectively in this first output and this second output.
19. Image sensor apparatus as claimed in claim 18; Wherein said first shift register also receives the one of which of the said second primary colours signal; And said second shift register also receives the one of which of said the 4th primary colours signal; Said second primary colours signal of said first shift register and said second shift register and the displacement that continues and said the 4th primary colours signal are so that this shift module is exported the one of which of the said second primary colours signal and the one of which of said the 4th primary colours signal respectively in this first output and this second output.
20. Image sensor apparatus as claimed in claim 1, wherein each first primary colours signal is two signals of corresponding different color light with each second primary colours signal.
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