CN102053252B - Flat panel X-ray sensor and driving method thereof - Google Patents
Flat panel X-ray sensor and driving method thereof Download PDFInfo
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- CN102053252B CN102053252B CN2009101981348A CN200910198134A CN102053252B CN 102053252 B CN102053252 B CN 102053252B CN 2009101981348 A CN2009101981348 A CN 2009101981348A CN 200910198134 A CN200910198134 A CN 200910198134A CN 102053252 B CN102053252 B CN 102053252B
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Abstract
The invention relates to a flat panel X-ray sensor and a driving method thereof. The flat panel X-ray sensor comprises a plurality of scanning line groups and a scanning control circuit, wherein each scanning line group comprises at least two scanning lines, and one end of each scanning line is connected with a switching element; the scanning control circuit comprises at least two control ends and a plurality of output ends; the control ends are used for controlling the connection with the switching elements; and each output end is connected with all the scanning lines of one scanning line group through the switching elements. The flat panel X-ray sensor provided by the invention has the advantages that the number of the output ends of the scanning control circuit is reduced; and the manufacturing cost is lowered.
Description
Technical field
The present invention relates to a kind of dull and stereotyped X-ray sensor and driving method thereof.
Background technology
Dull and stereotyped X-ray sensor is a kind of device that X-ray is converted into electric signal according to light intensity.The X-ray irradiating object and penetrate object after, change through absorption, scattering, reflective light intensity, the different light intensity of zones of different has been represented the difference of the inner structure of irradiated object zones of different.The X-ray that sees through irradiated object is converted into corresponding electric signal through dull and stereotyped X-ray sensor, finally realizes a gray scale image directly related with the irradiated object inner structure.So dull and stereotyped X-ray sensor has been realized the harmless internal imaging of object, be one of best approach that realizes Non-Destructive Testing, at imaging of medical, fields such as industrial lossless detection have all obtained using widely and significant progress.
Dull and stereotyped X-ray sensor is a large-area pel array, and how many sizes of pixel reflected the resolution and the area of last image with.Each pixel all has a photosensitive device in the sensor, is charge signal (number of electrons, voltage swing etc.) with the phototransformation of incident, and the size of charge signal is directly proportional with the light intensity of incident; Each pixel all has thin film transistor (TFT) (TFT) switch simultaneously, controls reading of electric signal.Pel array is pressed the X axle, Y direction is arranged, and one of them direction is opened to sweep trace output control signal control TFT, and the another one direction is utilized the data line sense data.After imaging is accomplished, the Push And Release of the thin film transistor (TFT) of each row pixel of peripheral circuit control; An every trade is opened thin film transistor (TFT) in order, and through said data line read output signal, all reads up to the picture element signal of whole flat board, accomplishes reading of entire image.Particularly; The grid of each row thin film transistor (TFT) links to each other with a sweep trace; Each sweep trace links to each other with a control end of said peripheral circuit; Wherein said peripheral circuit is a scan control circuit, said scan control circuit through said control end to said sweep trace input scan control signal in regular turn, thereby control opening and closing of every capable thin film transistor (TFT).Yet along with the resolution of flat panel sensor is increasing, the required sweep trace and the number of data line are more and more, and the output terminal number of required scan control circuit is also more and more, makes that the manufacturing cost of dull and stereotyped X-ray sensor is increasingly high.
Summary of the invention
The object of the present invention is to provide a kind of dull and stereotyped X-ray sensor of fan-out factor purpose that reduces scan control circuit.
The present invention also aims to provide a kind of driving method of above-mentioned dull and stereotyped X-ray sensor.
A kind of dull and stereotyped X-ray sensor comprises: a plurality of scanline groups, and each said scanline groups comprises at least two sweep traces, an end of each said sweep trace is connected with on-off element; Scan control circuit, said scan control circuit comprise at least two control ends and a plurality of output terminal, and said control end is used to control said on-off element, and each said output terminal links to each other via said on-off element with all sweep traces of said scanning line set.
The preferred a kind of technical scheme of the present invention, said dull and stereotyped X-ray sensor also comprises several rows and some row pixel cells, said each scanline groups is connected with delegation said pixel cell.
The preferred a kind of technical scheme of the present invention, said dull and stereotyped X-ray sensor also comprises a plurality of and said scanline groups data line crossing, each said data line is connected with the said pixel cell of at least two row.
The preferred a kind of technical scheme of the present invention, said on-off element is a thin film transistor (TFT).
The preferred a kind of technical scheme of the present invention; Each said scanline groups comprises two sweep traces; Said scan control circuit comprises two control ends; A control end of said scan control circuit is controlled the thin film transistor (TFT) conducting of a sweep trace of said scanline groups, and another control end of said scan control circuit is controlled the thin film transistor (TFT) conducting of another sweep trace of said scanline groups.
The preferred a kind of technical scheme of the present invention, the grid of said thin film transistor (TFT) connects the control end of said scan control circuit, and the source electrode of said thin film transistor (TFT) connects the output terminal of said scan control circuit, and the drain electrode of said thin film transistor (TFT) connects said sweep trace.
The preferred a kind of technical scheme of the present invention; Said pixel cell comprises a thin film transistor (TFT) and a pixel electrode; The grid of the thin film transistor (TFT) of said pixel cell connects said sweep trace; The source electrode of said thin film transistor (TFT) connects said pixel electrode, and the drain electrode of said thin film transistor (TFT) connects said data line.
The preferred a kind of technical scheme of the present invention, said at least two row pixel cells are arranged at the both sides of said data line.
A kind of driving method of dull and stereotyped X-ray sensor, a plurality of output terminal output scanning signals that comprise the steps: said scan control circuit are to said a plurality of scanline groups; At least two control ends output control signals of said scan control circuit, the opening and closing of the said on-off element that said control signal control is connected with each sweep trace of said scanline groups; Said sweep signal is input to the sweep trace of the said scanline groups that links to each other with the on-off element of opening.
The preferred a kind of technical scheme of the present invention; Said each scanline groups comprises two sweep traces; Said scan control circuit comprises two control ends; A control end of said scan control circuit is controlled opening and closing of on-off element that sweep trace of said scanline groups connects, and another control end of said scan control circuit is controlled opening and closing of on-off element that another sweep trace of said scanline groups connects.
The preferred a kind of technical scheme of the present invention; Said sweep signal continues two clock period; In first clock period; The opening and closing of the on-off element that control end control of said scan control circuit is connected with a sweep trace of said scanline groups, second clock period, another control end of said scan control circuit is controlled opening and closing of the on-off element that is connected with another sweep trace of said scanline groups.
The preferred a kind of technical scheme of the present invention; Said dull and stereotyped X-ray sensor also comprises a plurality of and said scanline groups data line crossing; Each said data line is connected with two row pixel cells, and in said first clock period, said data line reads the data of the said pixel cell of row; Second clock period, said data line reads another data that are listed as said pixel cell.
Compared with prior art, because dull and stereotyped X-ray sensor of the present invention comprises a plurality of scanline groups and scan control circuit, each said scanline groups comprises at least two sweep traces, and an end of each said sweep trace is connected with on-off element; Said scan control circuit comprises at least two control ends and a plurality of output terminal, and said control end is used to control said on-off element, and each said output terminal links to each other via said on-off element with all sweep traces of said scanning line set.Therefore the output terminal number of scan control circuit of the present invention greatly reduces with respect to prior art, thus the manufacturing cost of having saved dull and stereotyped X-ray sensor.In addition,, reduced data line number of the present invention, further reduced the manufacturing cost of the cost and the plate X-ray sensor of data reading circuit because each data line of the present invention is connected with at least two row pixel cells.
Description of drawings
Fig. 1 is the circuit diagram of dull and stereotyped X-ray sensor of the present invention.
Fig. 2 is the waveform synoptic diagram of the scan control circuit output of dull and stereotyped X-ray sensor shown in Figure 1.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, the present invention is made further detailed description below in conjunction with accompanying drawing.
See also Fig. 1, Fig. 1 is the circuit diagram of dull and stereotyped X-ray sensor of the present invention.Said dull and stereotyped X-ray sensor 10 mainly comprises a plurality of scanline groups, the scan control circuit 103 that is connected with said scanline groups, data reading circuit 109, link to each other with said data reading circuit 109 many data lines 110 that are parallel to each other and intersect with said scanline groups.
Said scanline groups comprises first sweep trace 101 and second sweep trace 102, the first transistor 107 that is connected with said first sweep trace, 101 1 ends, the transistor seconds 108 that is connected with said second sweep trace, 102 1 ends; Preferably, said first, second transistor 107,108 is a thin film transistor (TFT).Said scan control circuit 103 comprises first control end 104, second control end 105 and a plurality of output terminal 106.Said first control end 104 is used to control opening and closing of said the first transistor 107, and said second control end 105 is used to control opening and closing of said transistor seconds 108.Said each output terminal 106 links to each other via said first, second transistor 107,108 with first, second sweep trace 101,102 of said scanning line set.
Said dull and stereotyped X-ray sensor 10 comprises several rows and the some row pixel unit array that is arranged in array; Each said pixel cell comprises photodiode and the thin film transistor (TFT) that links to each other with said photodiode, and said photodiode is used for the light signal of incident is converted into electric signal.Said data line 110 is connected with the adjacent two row pixel cells of said pixel unit array, and preferred, said two row pixel cells are arranged at the both sides of said data line 110.First, second sweep trace 101,102 of said scanline groups connects the one-row pixels unit of said pixel unit array.
Concrete; One end of first sweep trace 101 of said scanline groups connects the drain electrode of said the first transistor 107; The grid of said the first transistor 107 connects first control end 104 of said scan control circuit 103, and the source electrode of said the first transistor 107 connects the output terminal 106 of said scan control circuit 103.One end of second sweep trace 102 of said scanline groups connects the drain electrode of said transistor seconds 108; The grid of said transistor seconds 108 connects second control end 105 of said scan control circuit 103, and the source electrode of said transistor seconds 108 connects the source electrode of said the first transistor 107.
Said first, second sweep trace 101,102 is first, second pixel cell at the pixel cell that is connected with said data line 110 intersections.In the intersection of said data line 110 with said scanline groups, the reading of the data of said first pixel cell of said first sweep trace, 101 controls, the reading of the data of said second pixel cell of said second sweep trace, 102 controls.Said first pixel cell comprises the 3rd transistor 113 and a pixel electrode 111; The grid of said the 3rd transistor 113 connects first sweep trace 101 of said scanline groups; The source electrode of said the 3rd transistor 113 connects said pixel electrode 111, and the drain electrode of said the 3rd transistor 113 connects said data line 110.Said second pixel cell comprises the 4th transistor 114 and another pixel electrode 112; The grid of said the 4th transistor 114 connects second sweep trace 102 of said scanline groups; The source electrode of said the 4th transistor 114 connects said pixel electrode 112, and the drain electrode of said the 4th transistor 114 connects said data line 110.
See also Fig. 2, Fig. 2 is the waveform synoptic diagram of scan control circuit 103 outputs of dull and stereotyped X-ray sensor 10 shown in Figure 1.Wherein, The clock signal of the said dull and stereotyped X-ray sensor 10 of " CK " expression; The oscillogram of the control signal of first control end, 104 outputs of the said scan control circuit 103 of " CL1 " expression; The oscillogram of the control signal of second control end, 105 outputs of the said scan control circuit 103 of " CL2 " expression, the oscillogram of the sweep signal of any three adjacent output terminal 106 outputs of " G1 ", " G2 ", the said scan control circuit 103 of " G3 " expression.Visible by figure, the control signal of said first control end 104 outputs continues a clock period, and clock period at interval between two adjacent control signals.The control signal of said second control end 105 output continues a clock period, and clock period at interval between two adjacent control signals.The control signal of said first, second control end 104,105 outputs replaces each other, first, second transistor 107,108 alternate conduction of promptly being controlled by the control signal of said first, second control end 104,105 outputs.A plurality of output terminals 106 of said scan control circuit 103 are the output scanning signal successively, and said sweep signal only is input to a scanline groups at every turn.The sweep signal of output terminal 106 outputs of said scan control circuit 103 continues two clock period; Clock period therein; Said the first transistor 107 conductings, sweep signal are input to first sweep trace 101 of said scanline groups, in another clock period; Said transistor seconds 108 conductings, sweep signal are input to second sweep trace 102 of said scanline groups.Because each output terminal of the scan control circuit 103 of dull and stereotyped X-ray sensor 10 of the present invention is to each scanline groups input scan signal; Therefore the output terminal number of the scan control circuit 103 of dull and stereotyped X-ray sensor 10 of the present invention greatly reduces with respect to prior art, thus saved should flat board X-ray sensor 10 manufacturing cost.In addition; Because each data line 110 of dull and stereotyped X-ray sensor 10 of the present invention is connected with at least two row pixel cells; Reduce data line 110 numbers of the present invention, further reduced the cost of data reading circuit 109 and manufacturing cost that should flat board X-ray sensor 10.
The driving method of dull and stereotyped X-ray sensor 10 of the present invention is following:
At first, the output terminal 106 output scanning signals of said scan control circuit 103, said sweep signal only is input to a scanline groups at every turn.
Then; In first clock period of said sweep signal; First control end, the 104 output control signals of said scan control circuit 103; Said control signal is controlled the first transistor 107 conductings that are connected with said first sweep trace 101 of said scanline groups; Sweep signal is input to first sweep trace 101 of said scanline groups, the 3rd transistor 113 conductings of first pixel cell that is connected with said first sweep trace 101, and said data reading circuit 109 reads the data on the pixel electrode 111 of said first pixel cell via the 3rd transistor 113 of said data line 110 and said conducting.At this moment, because the transistor seconds 108 that is connected with said second sweep trace 102 of said scanline groups ends, therefore, sweep signal can not be input to said second sweep trace 102, and said data reading circuit 109 can't be read the data of said second pixel cell.
In second clock period of said sweep signal; Second control end, the 105 output control signals of said scan control circuit 103; Said control signal is controlled transistor seconds 108 conductings that are connected with said second sweep trace 102 of said scanline groups; Sweep signal is input to second sweep trace 102 of said scanline groups; The data on the pixel electrode 112 of said second pixel cell are read in the 4th transistor 114 conductings of second pixel cell that is connected with said second sweep trace 102, said data reading circuit 109 via the 4th transistor 114 of said data line 110 and said conducting.At this moment, because the first transistor 107 that is connected with said first sweep trace 101 of said scanline groups ends, therefore, sweep signal can not be input to said first sweep trace 101, and said data reading circuit 109 can't be read the data of said first pixel cell.Like this, through two clock period, said data reading circuit 109 is accomplished reading the data of the corresponding pixel cell of the scanning line set that the sweep signal input is arranged.
According to identical principle; A plurality of output terminals 106 of said scan control circuit 103 are the output scanning signal successively; Said data reading circuit 109 is read the data of the corresponding pixel cell of scanning line set that sweep signal input is arranged successively, thereby accomplishes reading the data of the pixel cell of said dull and stereotyped X-ray sensor 10.
Compared with prior art; The scan control circuit 103 of dull and stereotyped X-ray sensor 10 of the present invention comprises first, second control end 104,105; The opening and closing of the first transistor 107 that said first control end 104 control is connected with first sweep trace 101 of said scanline groups; The opening and closing of the transistor seconds 108 that said second control end 105 control is connected with second sweep trace 101 of said scanline groups; Thereby make said sweep signal be input to first sweep trace 101 of said scanline groups in first clock period; Be input to second sweep trace 102 of said scanline groups in the second clock cycle, thereby make said data reading circuit 109 utilize a data line 110 promptly to can read the data on the two row pixel cells in the time a sweep signal.Therefore, dull and stereotyped X-ray sensor 10 of the present invention can also reduce the number of data line 110, thereby reduce the manufacturing cost of said dull and stereotyped X-ray sensor 10 except the number of the output terminal 106 of minimizing scan control circuit 103.
In the above-described embodiment; Said each scanline groups comprises first, second sweep trace 101,102; Also can comprise the multi-strip scanning line, corresponding, said scan control circuit 103 comprises first, second control end 104,105; Also can comprise a plurality of control ends, it is said to be not limited to above-mentioned embodiment.
In the above-described embodiment; First, second transistor 107,108 that first, second sweep trace 101,102 1 ends of said each scanline groups connect is a switching transistor; Said first, second sweep trace 101,102 can also be other on-off elements such as controllable diode or on-off circuit, and it is said to be not limited to above-mentioned embodiment.
In the above-described embodiment, each data line 110 connects two row pixel cells of the pixel cell of said array arrangement, also can connect the multiple row pixel cell, and it is said to be not limited to above-mentioned embodiment.
Under situation without departing from the spirit and scope of the present invention, can also constitute many very embodiment of big difference that have.Should be appreciated that except like enclosed claim limited, the invention is not restricted at the specific embodiment described in the instructions.
Claims (12)
1. a dull and stereotyped X-ray sensor is characterized in that, comprising:
A plurality of scanline groups, each said scanline groups comprises at least two sweep traces, an end of each said sweep trace is connected with on-off element;
Scan control circuit, said scan control circuit comprise at least two control ends and a plurality of output terminal, and said control end is used to control said on-off element, and each said output terminal links to each other via said on-off element with all sweep traces of said scanning line set.
2. dull and stereotyped X-ray sensor as claimed in claim 1 is characterized in that: said dull and stereotyped X-ray sensor also comprises several rows and some row pixel cells, and said each scanline groups is connected with delegation said pixel cell.
3. dull and stereotyped X-ray sensor as claimed in claim 2 is characterized in that: said dull and stereotyped X-ray sensor also comprises a plurality of and said scanline groups data line crossing, and each said data line is connected with the said pixel cell of at least two row.
4. dull and stereotyped X-ray sensor as claimed in claim 3 is characterized in that: said on-off element is a thin film transistor (TFT).
5. dull and stereotyped X-ray sensor as claimed in claim 4; It is characterized in that: each said scanline groups comprises two sweep traces; Said scan control circuit comprises two control ends; A control end of said scan control circuit is controlled the thin film transistor (TFT) conducting of a sweep trace of said scanline groups, and another control end of said scan control circuit is controlled the thin film transistor (TFT) conducting of another sweep trace of said scanline groups.
6. dull and stereotyped X-ray sensor as claimed in claim 4; It is characterized in that: the grid of said thin film transistor (TFT) connects the control end of said scan control circuit; The source electrode of said thin film transistor (TFT) connects the output terminal of said scan control circuit, and the drain electrode of said thin film transistor (TFT) connects said sweep trace.
7. dull and stereotyped X-ray sensor as claimed in claim 3; It is characterized in that: said pixel cell comprises a thin film transistor (TFT) and a pixel electrode; The grid of the thin film transistor (TFT) of said pixel cell connects said sweep trace; The source electrode of said thin film transistor (TFT) connects said pixel electrode, and the drain electrode of said thin film transistor (TFT) connects said data line.
8. dull and stereotyped X-ray sensor as claimed in claim 3 is characterized in that: said at least two row pixel cells are arranged at the both sides of said data line.
9. one kind is carried out method of driving to the described dull and stereotyped X-ray sensor of claim 1, comprises the steps:
A plurality of output terminal output scanning signals of said scan control circuit are to said a plurality of scanline groups;
At least two control ends output control signals of said scan control circuit, the opening and closing of the said on-off element that said control signal control is connected with each sweep trace of said scanline groups;
Said sweep signal is input to the sweep trace of the said scanline groups that links to each other with the on-off element of opening.
10. as claimed in claim 9 dull and stereotyped X-ray sensor is carried out method of driving; It is characterized in that; Said each scanline groups comprises two sweep traces; Said scan control circuit comprises two control ends, and a control end of said scan control circuit is controlled opening and closing of on-off element that sweep trace of said scanline groups connects, and another control end of said scan control circuit is controlled opening and closing of on-off element that another sweep trace of said scanline groups connects.
11. as claimed in claim 10 dull and stereotyped X-ray sensor is carried out method of driving; It is characterized in that; Said sweep signal continues two clock period; In first clock period; The opening and closing of the on-off element that control end control of said scan control circuit is connected with a sweep trace of said scanline groups, second clock period, another control end of said scan control circuit is controlled opening and closing of the on-off element that is connected with another sweep trace of said scanline groups.
12. as claimed in claim 11 dull and stereotyped X-ray sensor is carried out method of driving; It is characterized in that said dull and stereotyped X-ray sensor also comprises a plurality of and said scanline groups data line crossing, each said data line is connected with two row pixel cells; In said first clock period; Said data line reads the data of the said pixel cell of row, and second clock period, said data line reads another data that are listed as said pixel cell.
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| CN105182396B (en) | 2015-06-29 | 2018-04-24 | 苏州瑞派宁科技有限公司 | A kind of channel multiplexing method that detector signal is read |
| CN107135359B (en) * | 2016-02-26 | 2020-04-14 | 上海箩箕技术有限公司 | Image acquisition method of TFT (thin film transistor) flat-panel image sensor |
| WO2020191672A1 (en) * | 2019-03-27 | 2020-10-01 | 京东方科技集团股份有限公司 | Biological detection chip, biological detection device and detection method thereof |
| CN111510650B (en) * | 2020-04-26 | 2021-06-04 | 豪威芯仑传感器(上海)有限公司 | Image sensor |
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| CN1438713A (en) * | 2001-10-03 | 2003-08-27 | 株式会社东芝 | X-ray plane detector |
| CN1871999A (en) * | 2005-06-01 | 2006-12-06 | 株式会社岛津制作所 | Radiogram device and processing method of radiation detection signal |
| CN1973214A (en) * | 2003-11-10 | 2007-05-30 | Ls科技股份有限公司 | Flat-panel detector utilizing electrically interconnecting tiled photosensor arrays |
| CN101551462A (en) * | 2008-03-31 | 2009-10-07 | 通用电气公司 | Dual function detector device |
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- 2009-11-03 CN CN2009101981348A patent/CN102053252B/en active Active
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| CN1438713A (en) * | 2001-10-03 | 2003-08-27 | 株式会社东芝 | X-ray plane detector |
| CN1973214A (en) * | 2003-11-10 | 2007-05-30 | Ls科技股份有限公司 | Flat-panel detector utilizing electrically interconnecting tiled photosensor arrays |
| CN1871999A (en) * | 2005-06-01 | 2006-12-06 | 株式会社岛津制作所 | Radiogram device and processing method of radiation detection signal |
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