CN113014836B - Flat panel detector capable of collecting images in different areas and stages - Google Patents
Flat panel detector capable of collecting images in different areas and stages Download PDFInfo
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- CN113014836B CN113014836B CN202110239554.7A CN202110239554A CN113014836B CN 113014836 B CN113014836 B CN 113014836B CN 202110239554 A CN202110239554 A CN 202110239554A CN 113014836 B CN113014836 B CN 113014836B
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 27
- 229910021417 amorphous silicon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/70—SSIS architectures; Circuits associated therewith
- H04N25/701—Line sensors
- H04N25/7013—Line sensors using abutted sensors forming a long line
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
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Abstract
The invention discloses a flat panel detector capable of collecting images in different areas and stages, which comprises an X-ray collector, wherein the X-ray collector comprises a photosensitive layer, a photodiode circuit and a TFT gate driving circuit, and the TFT gate driving circuit is divided into a plurality of TFT gate tube groups in a transverse mode; the invention realizes regional control of the TFT gate switch by dividing the photodiode circuit into a plurality of regions from the transverse direction, and realizes regional and staged image acquisition of the flat panel detector by dividing the photodiode circuit into a plurality of analog-digital conversion tube groups in the regions longitudinally and simultaneously combining a DC-DC driving power supply to separately supply power to the TFT gate tube groups in the corresponding regions.
Description
Technical Field
The invention relates to the technical field of flat panel detectors, in particular to a flat panel detector capable of collecting images in different areas in stages.
Background
The traditional flat panel detector sequentially opens the TFT gate control end row by row, acquires images through an analog-to-digital converter, such as gate control driving chips of 128 channels, 256 channels, 512 channels and other channels which are widely used, and opens the TFT gate control end row by row when the flat panel detector with the size of 14 x 17 or 17 x 17 and the like acquires images, and the analog-to-digital converter acquires images row by row according to the sequence of opening the TFT gate control by the gate control driving chip.
Disclosure of Invention
The invention aims to provide a flat panel detector capable of collecting images in different areas and stages, so as to solve the problem that imaging areas and stages cannot be selected when the conventional flat panel detector is used for collecting images according to the sequence that a gate driving chip is used for opening a TFT gate to collect images row by row.
In order to achieve the above object, the present invention provides a flat panel detector capable of capturing images in different areas in stages, comprising:
an X-ray collector, the X-ray collector comprising:
the photosensitive layer can absorb X-rays and convert the X-rays into visible light;
a photodiode circuit for absorbing visible light and converting into a corresponding number of electrons;
a TFT gate driving circuit for transmitting electrons converted by the photodiode, the TFT gate driving circuit being divided into a plurality of TFT gate groups in a lateral direction;
the flat panel detector further comprises:
the control panel is electrically connected with a gate driving circuit and a power driving module, wherein the gate driving circuit comprises a plurality of gate driving modules, each gate driving module is respectively and electrically connected with a corresponding TFT gate tube group, the power driving module is electrically connected with a plurality of DC-DC driving power supplies, and each DC-DC driving power supply is respectively and electrically connected with a corresponding TFT gate tube group;
and the analog-to-digital conversion circuit is used for transmitting charges generated by the photodiode circuit and carrying out analog and digital conversion, and comprises analog-to-digital conversion tube groups which longitudinally divide the photodiode circuit into a plurality of areas, and each analog-to-digital conversion tube group is further electrically connected with the control board.
Compared with the prior art, the invention has the beneficial effects that: the invention realizes regional control of the TFT gate switch by transversely dividing the photodiode circuit into a plurality of areas, and realizes regional and staged image acquisition of the flat panel detector by longitudinally dividing the photodiode circuit into a plurality of analog-digital conversion tube groups in the areas and simultaneously combining a DC-DC driving power supply to separately supply power to the TFT gate tube groups in the corresponding areas.
Preferably, the photodiode circuit comprises a plurality of photoelectric lines which are transversely connected in parallel, and each photoelectric line is connected with a plurality of photodiodes in parallel, and visible light is absorbed by the photodiodes and converted into corresponding numbers of electrons.
Preferably, the control board is further connected with a communication module, and the communication module is communicated with the power control module, so that the control board can be connected with an external host through the communication module for communication.
Preferably, the voltage value of the DC-DC driving power supply is adjustable, and the requirements of different image acquisition effects are met by adjusting the voltage value.
Preferably, the TFT gate group comprises a TFT driving chip and gate lines corresponding to the photoelectric lines, the gate lines are electrically connected with the TFT driving chip, and the DC-DC driving power supply is electrically connected with the corresponding TFT driving chip; and each gating circuit is connected with a plurality of TFT gating switches in parallel, the TFT gating switches on the gating circuits are connected with the photodiodes on the corresponding photoelectric circuits in a one-to-one correspondence manner, the TFT gating switches are turned on, and electrons converted by the photodiodes are transferred to the analog-to-digital conversion circuit and are subjected to analog and digital conversion.
Preferably, the analog-digital conversion tube group comprises an analog-digital converter and a preset number of readout lines which are longitudinally arranged, and the TFT gate switches in the same column are electrically connected with the readout lines in the corresponding column.
Drawings
FIG. 1 is a schematic diagram of the structure of the flat panel probe of the present invention;
fig. 2 is a schematic circuit diagram of a group 1 TFT gating stack, a group 1 a/d conversion stack, and a photodiode circuit according to the present invention.
In the figure: 1. a photoelectric circuit; 2. a photodiode; 3. a gate control circuit; 4. a TFT driving chip; 5. a TFT gating switch; 6. a readout line; 7. an analog-to-digital converter.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-2, the present invention provides a technical solution: the embodiment takes an amorphous silicon flat panel detector as an example, the flat panel detector comprises an X-ray collector, the X-ray collector comprises a photosensitive layer capable of absorbing X-rays and converting the X-rays into visible light, a photodiode circuit made of amorphous silicon, a control board and an analog-to-digital conversion circuit, wherein the photodiode circuit is mainly used for absorbing the visible light and converting the visible light into corresponding numbers of electrons, the analog-to-digital conversion circuit is mainly used for transmitting charges generated by the photodiode circuit and carrying out analog and digital conversion, the analog-to-digital conversion circuit comprises analog-to-digital conversion tube groups which longitudinally divide the photodiode circuit into a plurality of areas, and each analog-to-digital conversion tube group is electrically connected with the control board; the photodiode circuit comprises a plurality of photoelectric lines 1 which are transversely arranged, and a plurality of photodiodes 2 are connected to each photoelectric line 1 in parallel.
And the control panel is electrically connected with a gate control driving circuit and a power supply driving module, wherein:
the gate driving circuit comprises a plurality of gate driving modules, the gate driving modules are electrically connected with the TFT gate driving circuits, in order to achieve the purpose of capturing images in different areas in stages, the TFT gate driving circuits are transversely divided into a plurality of TFT gate tube groups in a transverse mode, the TFT gate driving circuits are transversely divided into a plurality of areas by taking 128 channels as references, each TFT gate tube group comprises 128 gate lines 3 and 1 TFT driving chip 4 which are transversely arranged, the 128 gate lines 3 are respectively electrically connected with the TFT driving chips 4, a plurality of TFT gate switches 5 are connected to each gate line 3 in parallel, and the TFT gate switches 5 on the gate lines 3 are correspondingly connected with the photodiodes 2 on the corresponding photoelectric lines 1 in a one-to-one mode;
the power supply driving module is electrically connected with a plurality of DC-DC driving power supplies, and each DC-DC driving power supply is respectively and electrically connected with a corresponding TFT gate control tube group; the effect of supplying power to a plurality of TFT driving chips 4 separately and simultaneously opening TFT gate control switches 5 in a plurality of areas in a plurality of rows is achieved, and the image acquisition efficiency is improved; in addition, the voltage value of the DC-DC driving power supply is adjustable;
the analog-digital conversion circuit comprises a plurality of readout lines 6 which are longitudinally arranged, and the photodiode circuit is longitudinally divided into a plurality of areas by taking a 128-channel analog-digital conversion tube group as a reference in the specific embodiment, namely, one analog-digital conversion tube group comprises 128 readout lines 6 which are longitudinally arranged and 1 analog-digital converter 7, and the TFT gate switches 5 which are positioned in the same column are all communicated with the readout lines 6 of the corresponding column; the analog-digital conversion tube group is also electrically connected with the control panel, so that the regional and staged image acquisition of the flat panel detector is realized by combining the transverse divided TFT gate tube group with the longitudinal divided analog-digital conversion tube group and respectively supplying power to the corresponding TFT gate tube group by means of a plurality of DC-DC driving power supplies; for example, the embodiment realizes regional image acquisition, the TFT gate driving circuit is transversely divided into the areas A1-a128, a129-a256, a257-a383 and the analog-digital conversion circuit is longitudinally divided into the areas B1-B128, B129-B256, B257-B383, and the user can simultaneously singly select or multiply select the areas of the image to be acquired. Or the user can set the sequence of the areas for collecting the images according to the needs, and the images collected by the flat panel detector have regionality and stage.
In addition, the control panel is also connected with a communication module which is communicated with the power control module, and the control panel can be connected with an external host through the communication module for communication.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.
Claims (4)
1. A flat panel detector for regional and staged image acquisition, comprising:
an X-ray collector, the X-ray collector comprising:
the photosensitive layer can absorb X-rays and convert the X-rays into visible light;
a photodiode circuit for absorbing visible light and converting into a corresponding number of electrons; the photodiode circuit comprises a plurality of photoelectric lines which are transversely connected in parallel, and each photoelectric line is connected with a plurality of photodiodes in parallel;
a TFT gate driving circuit for transmitting electrons converted by the photodiode, the TFT gate driving circuit being divided into a plurality of TFT gate groups in a lateral direction;
the flat panel detector further comprises:
the control panel is electrically connected with a gate driving circuit and a power driving module, wherein the gate driving circuit comprises a plurality of gate driving modules, each gate driving module is respectively and electrically connected with a corresponding TFT gate tube group, the power driving module is electrically connected with a plurality of DC-DC driving power supplies, and each DC-DC driving power supply is respectively and electrically connected with a corresponding TFT gate tube group;
the TFT gate control tube group comprises a TFT driving chip and gate control lines, wherein the gate control lines are in corresponding number with the photoelectric lines, the gate control lines are electrically connected with the TFT driving chip, and the DC-DC driving power supply is electrically connected with the corresponding TFT driving chip; each gating circuit is connected with a plurality of TFT gating switches in parallel, and the TFT gating switches on the gating circuits are connected with photodiodes on the corresponding photoelectric circuits in a one-to-one correspondence;
and the analog-to-digital conversion circuit is used for transmitting charges generated by the photodiode circuit and carrying out analog and digital conversion, and comprises analog-to-digital conversion tube groups which longitudinally divide the photodiode circuit into a plurality of areas, and each analog-to-digital conversion tube group is further electrically connected with the control board.
2. The flat panel detector for capturing images in different areas according to claim 1, wherein the control board is further connected with a communication module, and the communication module is connected with the power control module.
3. The flat panel detector for capturing images in stages in different areas according to claim 1, wherein the voltage value of the DC-DC driving power supply is adjustable.
4. The flat panel detector for capturing images in different areas according to claim 1, wherein the analog-to-digital conversion tube set comprises an analog-to-digital converter, a preset number of readout lines longitudinally arranged, and TFT gate switches in the same column are all connected with the readout lines in the corresponding column.
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| CN113014836B true CN113014836B (en) | 2023-05-26 |
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| WO2013101425A1 (en) * | 2011-12-31 | 2013-07-04 | Carestream Health, Inc. | Radiographic detector with rapid power-up, imaging apparatus and methods using the same |
| CN211609825U (en) * | 2019-12-27 | 2020-10-02 | 德润特医疗科技（武汉）有限公司 | Flat panel detector with AEC detection function |
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| JP3696176B2 (en) * | 2002-05-14 | 2005-09-14 | 株式会社東芝 | Imaging device |
| JP2015125245A (en) * | 2013-12-26 | 2015-07-06 | シナプティクス・ディスプレイ・デバイス合同会社 | Liquid crystal display device, liquid crystal driver, and drive method of the liquid crystal display panel |
| CN106547010B (en) * | 2015-09-21 | 2019-02-01 | 上海奕瑞光电子科技股份有限公司 | X-ray flat panel detector based on automatic exposure |
| CN108507599B (en) * | 2017-02-24 | 2021-05-14 | 奕瑞影像科技（太仓）有限公司 | X-ray sensor panel and X-ray detector with high compatibility |
| CN209404805U (en) * | 2018-11-27 | 2019-09-20 | 上海品臻影像科技有限公司 | A kind of flat panel detector |
| CN109887940A (en) * | 2019-02-19 | 2019-06-14 | 上海奕瑞光电子科技股份有限公司 | A kind of flexibility X-ray sensing device and detector |
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| WO2013101425A1 (en) * | 2011-12-31 | 2013-07-04 | Carestream Health, Inc. | Radiographic detector with rapid power-up, imaging apparatus and methods using the same |
| CN211609825U (en) * | 2019-12-27 | 2020-10-02 | 德润特医疗科技（武汉）有限公司 | Flat panel detector with AEC detection function |
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