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1. 发明授权

US10147749B2 Reduction of TFT instability in digital x-ray detectors 有权
公开(公告)号：US10147749B2
公开(公告)日：2018-12-04
申请号：US15563961
申请日：2016-04-12
申请人： Carestream Health, Inc. , Kyung Hee University
发明人： Ravi K. Mruthyunjaya , Timothy J. Tredwell , Jin Jang , Mallory Mativenga , Jae Gwang Um , Mohammad Masum Billah
IPC分类号： H01L27/146 , G01T1/24 , H01L29/49 , H01L29/66 , H01L29/786 , H01L21/02 , H01L21/443 , H01L27/12
摘要： A digital radiographic detector uses an IGZO active layer in the switching element for each imaging pixel in a two-dimensional array of imaging pixels. Each imaging pixel has a photo-sensitive element and the switching element. Read-out circuits electrically connected to the two-dimensional array generate a radiographic image by reading out image data by switching on and off the switching elements. The IGZO active layer may be formed having a thickness less than about 7 nm.

2. 发明授权

US09971039B2 Apparatus and method of DRD panel operation using oxide TFTS 有权
公开(公告)号：US09971039B2
公开(公告)日：2018-05-15
申请号：US15080645
申请日：2016-03-25
申请人： Carestream Health, Inc.
发明人： Ravi K. Mruthyunjaya
IPC分类号： G01T1/26 , G01T1/175 , G01T1/24 , H01L27/146 , H04N5/32
CPC分类号： G01T1/175 , G01T1/24 , H01L27/14632 , H01L27/14643 , H01L27/14659 , H01L27/14663 , H04N5/32
摘要： A method of operating a digital radiographic detector having an array of imaging pixels, wherein a predetermined gate voltage is applied to the transistor gates in the array in a dark environment. The preselected gate voltage is maintained for a predetermined duration to increase a threshold voltage of the transistor.

3. 发明授权

US10269839B2 Apparatus and method using a dual gate TFT structure 有权
公开(公告)号：US10269839B2
公开(公告)日：2019-04-23
申请号：US14979683
申请日：2015-12-28
申请人： Carestream Health, Inc.
发明人： Ravi K. Mruthyunjaya
IPC分类号： G01T1/24 , H01L27/146 , H04N5/32 , H04N5/374
摘要： A detector having an array of pixels arranged in columns and rows. Each of the pixels has a photosensor and a switch device. The switch devices in each pair of row-adjacent pixels are connected to a common data line and a common bottom gate line. A pair of top gate lines are each connected to one of the pair of row-adjacent pixels.

4. 发明授权

US10136075B2 Compensation circuit for an x-ray detector 有权
公开(公告)号：US10136075B2
公开(公告)日：2018-11-20
申请号：US14972561
申请日：2015-12-17
申请人： Carestream Health, Inc.
发明人： Ravi K. Mruthyunjaya
IPC分类号： H04N5/32
摘要： A pixel circuit includes a voltage compensation circuit connected to a body terminal of the pixel's switching TFT to compensate for a decreasing threshold voltage drift of the TFT.

5. 发明授权

US11474049B2 Conformable x-ray sensor panel 有权
公开(公告)号：US11474049B2
公开(公告)日：2022-10-18
申请号：US17124739
申请日：2020-12-17
申请人： CARESTREAM HEALTH, INC.
发明人： Todd D. Bogumil , Ravi K. Mruthyunjaya
IPC分类号： G01N23/04 , G01N23/083
摘要： A flexible digital radiographic detector assembly uses a conformable bag having granular media therein to enclose the detector and to help fit the detector onto a curved object. The conformable bag is evacuated to hold the detector against the object to be imaged. An image of the object is acquired by aiming x-rays through the object toward the detector.

6. 发明申请

US20180138219A1 REDUCTION OF TFT INSTABILITY IN DIGITAL X-RAY DETECTORS 审中-公开
公开(公告)号：US20180138219A1
公开(公告)日：2018-05-17
申请号：US15563961
申请日：2016-04-12
申请人： Carestream Health, Inc. , Kyung Hee University
发明人： Ravi K. Mruthyunjaya , Timothy J. Tredwell , Jin Jang , Mallory Mativenga , Jae Gwang Um , Mohammad Masum Billah
IPC分类号： H01L27/146 , H01L29/66 , H01L29/49 , H01L29/786 , G01T1/24
CPC分类号： H01L27/14616 , G01T1/247 , H01L21/02164 , H01L21/02274 , H01L21/02565 , H01L21/02592 , H01L21/02631 , H01L21/443 , H01L27/1225 , H01L27/14612 , H01L27/14618 , H01L27/14658 , H01L27/14663 , H01L27/14692 , H01L27/14694 , H01L29/4908 , H01L29/66969 , H01L29/78693
摘要： A digital radiographic detector uses an IGZO active layer in the switching element for each imaging pixel in a two-dimensional array of imaging pixels. Each imaging pixel has a photo-sensitive element and the switching element. Read-out circuits electrically connected to the two-dimensional array generate a radiographic image by reading out image data by switching on and off the switching elements. The IGZO active layer may be formed having a thickness less than about 7 nm.

7. 发明申请

US20150369930A1 RADIOGRAPHIC IMAGING DETECTOR USING VOLTAGE CONVERSION ON GLASS 审中-公开
标题翻译：使用玻璃上的电压转换的放射成像检测器
公开(公告)号：US20150369930A1
公开(公告)日：2015-12-24
申请号：US14653441
申请日：2014-03-14
申请人： CARESTREAM HEALTH, INC.
发明人： Ravi K. Mruthyunjaya , Jeffrey R. Hawver
IPC分类号： G01T1/20 , G01T1/24
CPC分类号： G01T1/2018 , G01T1/247 , H04N5/32 , H04N5/3745 , H04N5/378
摘要： Exemplary embodiments of digital radiographic area detectors and/or methods for using the same can include an imaging array (12) including a plurality of active pixels (22), each active pixel (22) including at least one amorphous silicon and/or amorphous indium-gallium-zinc-oxide electrically chargeable photosensor and at least three thin-film transistors; scanlines coupled to a plurality of active pixels (22) arranged along a first direction in a portion of the imaging array (12); datalines coupled to a plurality of active pixels (22) arranged along a second direction in the portion of the imaging array (12); circuits to provide signal sensing for the portion of the imaging array (12) coupled to the second conductive lines; and charge conversion circuitry to convert voltage values output by the active pixels (22) to a corresponding charge values for input to the signal sensing circuits during readout.
摘要翻译：数字放射线照相区域检测器和/或其使用方法的示例性实施例可以包括包括多个有源像素（22）的成像阵列（12），每个有源像素（22）包括至少一个非晶硅和/或非晶铟 - 氧化镓 - 氧化锌可充电的光电传感器和至少三个薄膜晶体管; 耦合到在成像阵列（12）的一部分中沿着第一方向布置的多个有源像素（22）的扫描线; 耦合到沿着成像阵列（12）的部分中的第二方向布置的多个有源像素（22）的数据线; 用于为耦合到第二导线的成像阵列（12）的部分提供信号感测的电路; 以及电荷转换电路，用于将由有源像素（22）输出的电压值转换为相应的电荷值，以便在读出期间输入到信号感测电路。

8. 发明申请

US20150236062A1 RADIOGRAPHIC IMAGING ARRAY FABRICATION PROCESS FOR METAL OXIDE THIN-FILM TRANSISTORS WITH REDUCED MASK COUNT 审中-公开
标题翻译：具有减少掩模数的金属氧化物薄膜晶体管的放射成像阵列制造工艺
公开(公告)号：US20150236062A1
公开(公告)日：2015-08-20
申请号：US14696981
申请日：2015-04-27
申请人： Carestream Health, Inc.
发明人： Jeff Hsin Chang , Ravi K. Mruthyunjaya , Timothy J. Tredwell
IPC分类号： H01L27/146 , H01L29/66 , H01L27/12 , H01L29/786
CPC分类号： H01L27/14616 , H01L27/1288 , H01L27/14658 , H01L27/14659 , H01L27/14676 , H01L27/14687 , H01L27/14689 , H01L27/14692 , H01L29/66969 , H01L29/78603 , H01L29/78693
摘要： Embodiments of radiographic imaging systems; radiography detectors and methods for using the same; and/or fabrication methods therefore can include radiographic imaging array that can include a plurality of pixels that each include a photoelectric conversion element coupled to a thin-film switching element. In certain exemplary embodiments, thin-film switching element is a metal oxide (e.g., a-IGZO) TFT manufactured using a reduce photolithography mask counts. In certain exemplary embodiments, the thin-film switching element is a metal oxide (e.g., a-IGZO) TFT that includes reduced lower alignment tolerances between TFT electrodes. In certain exemplary embodiments, the thin-film switching element is a metal oxide (e.g., a-IGZO) TFT including a reduced thickness active layer.
摘要翻译：射线成像系统的实施例; 放射线检测器及其使用方法; 和/或制造方法因此可以包括可以包括多个像素的放射线照相成像阵列，每个像素包括耦合到薄膜开关元件的光电转换元件。在某些示例性实施例中，薄膜开关元件是使用减少光刻掩模计数制造的金属氧化物（例如，a-IGZO）TFT。在某些示例性实施例中，薄膜开关元件是包括在TFT电极之间降低的对准公差的金属氧化物（例如，a-IGZO）TFT。在某些示例性实施例中，薄膜开关元件是包括减小厚度的有源层的金属氧化物（例如，a-IGZO）TFT。

9. 发明授权

US11411041B2 Flexible substrate module and fabrication method 有权
公开(公告)号：US11411041B2
公开(公告)日：2022-08-09
申请号：US16603424
申请日：2017-05-15
申请人： CARESTREAM HEALTH, INC.
发明人： Timothy J. Wojcik , Ravi K. Mruthyunjaya , Bradley S. Jadrich
IPC分类号： H01L27/146 , H01L23/60 , H01L31/18 , H01L31/0392
摘要： A digital radiographic image sensor includes a flexible first substrate with an image sensor array. A scintillator is formed over the array, and bonding pads in a peripheral region outside the array are connected to the array. A second substrate is attached to a bottom of the first substrate and includes a scribed or perforated break line to enable removal of a peripheral region of the second substrate.

10. 发明授权

US11195874B2 Detach and reattach of a flexible polyimide based X-ray detector 有权
公开(公告)号：US11195874B2
公开(公告)日：2021-12-07
申请号：US16468441
申请日：2018-01-04
申请人： CARESTREAM HEALTH, INC.
发明人： Timothy J. Wojcik , Ravi K. Mruthyunjaya , Bradley S. Jadrich
IPC分类号： H01L21/30 , H01L21/46 , H01L27/146 , G01T1/20 , H01L27/30
摘要： An image sensor array formed on a flexible first substrate is supported by a flexible second substrate attached thereto. The second substrate has a top surface with an adhesive thereon for attaching the substrates together. The adhesive is on a portion of the second substrate directly beneath the image sensor array to allow selective formation of the second substrate.

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