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公开(公告)号：US11087656B2
公开(公告)日：2021-08-10
申请号：US16656447
申请日：2019-10-17
Applicant: Samsung Display Co., Ltd.
Inventor： Anup P. Jose , Amir Amirkhany , Mohamed Elzeftawi
Abstract: A system and method for sensing drive current in a pixel. In some embodiments, the system includes: a first pixel, a second pixel, a differential sensing circuit, a reference current source, and a control circuit. The differential sensing circuit may have a first input, a second input, and an output, the first input being connected to a node at which a reference current generated by the reference current source is subtracted from a first pixel current, the first pixel current including a current generated by the first pixel. The second input may be configured to receive a second pixel current, the second pixel current including a current generated by the second pixel. The output may be configured to produce an output signal based on a difference between a current received at the first input and a current received at the second input.
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公开(公告)号：US20210049963A1
公开(公告)日：2021-02-18
申请号：US16657680
申请日：2019-10-18
Applicant: Samsung Display Co., Ltd.
Inventor： Amir Amirkhany , Anup P. Jose , Gaurav Malhotra , Younghoon Song , Mohamed Elzeftawi
IPC: G09G3/3258 , G09G3/20
Abstract: A system and method for estimating and using pixel compensation coefficients. In some embodiments, the method includes, during a first time interval: comparing a first pixel current for a pixel of the display with a first reference current, to obtain a first pixel current error signal, the first pixel current error signal being the sign of a difference between the first pixel current and the first reference current; and updating one or more compensation coefficients for the pixel, based on the first pixel current error signal.
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公开(公告)号：US10554450B2
公开(公告)日：2020-02-04
申请号：US16054902
申请日：2018-08-03
Applicant: Samsung Display Co., Ltd.
Inventor： Mohamed Elzeftawi , Amir Amirkhany
IPC: H04L25/02 , H03K19/0185 , H03M1/68 , H03K19/00 , H03M1/00
Abstract: A method of performing coarse calibration of a voltage-mode (VM) driver having a plurality of driver slices connected in parallel includes setting a control code applied to activated driver slices of the plurality of driver slices to a maximum value to minimize an output resistance of the activated driver slices, activating one driver slice of the plurality of driver slices by applying the control code to the one driver slice, while disabling other driver slices of the plurality of driver slices, measuring an output resistance of the VM driver, determining whether the output resistance of the VM driver is greater than a desired resistance, and in response to determining that the output resistance of the VM driver is greater than a desired resistance activating one more driver slice of the plurality of driver slices.
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Patent Agency Ranking
公开(公告)号：US11250780B2
公开(公告)日：2022-02-15
申请号：US16657680
申请日：2019-10-18
Applicant: Samsung Display Co., Ltd.
Inventor： Amir Amirkhany , Anup P. Jose , Gaurav Malhotra , Younghoon Song , Mohamed Elzeftawi
IPC: G09G3/3258 , G09G3/20
Abstract: A system and method for estimating and using pixel compensation coefficients. In some embodiments, the method includes, during a first time interval: comparing a first pixel current for a pixel of the display with a first reference current, to obtain a first pixel current error signal, the first pixel current error signal being the sign of a difference between the first pixel current and the first reference current; and updating one or more compensation coefficients for the pixel, based on the first pixel current error signal.
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公开(公告)号：US11069282B2
公开(公告)日：2021-07-20
申请号：US16656423
申请日：2019-10-17
Applicant: Samsung Display Co., Ltd.
Inventor： Amir Amirkhany , Anup P. Jose , Gaurav Malhotra , Younghoon Song , Mohamed Elzeftawi
Abstract: A system and method for operating a sensing circuit for sensing a pixel current of a pixel of a display panel using correlated double sampling. In some embodiments, the method includes: during a first interval of time, resetting a pixel sensing circuit; during a third interval of time following the first interval of time, operating the pixel sensing circuit in an integration mode; during a fourth interval of time following the third interval of time, operating the pixel sensing circuit in a hold mode; and during a fifth interval of time following the fourth interval of time, operating the pixel sensing circuit in the integration mode.
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公开(公告)号：US20210049951A1
公开(公告)日：2021-02-18
申请号：US16656423
申请日：2019-10-17
Applicant: Samsung Display Co., Ltd.
Inventor： Amir Amirkhany , Anup P. Jose , Gaurav Malhotra , Younghoon Song , Mohamed Elzeftawi
Abstract: A system and method for operating a sensing circuit for sensing a pixel current of a pixel of a display panel using correlated double sampling. In some embodiments, the method includes: during a first interval of time, resetting a pixel sensing circuit; during a third interval of time following the first interval of time, operating the pixel sensing circuit in an integration mode; during a fourth interval of time following the third interval of time, operating the pixel sensing circuit in a hold mode; and during a fifth interval of time following the fourth interval of time, operating the pixel sensing circuit in the integration mode.
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公开(公告)号：US20210049943A1
公开(公告)日：2021-02-18
申请号：US16656447
申请日：2019-10-17
Applicant: Samsung Display Co., Ltd.
Inventor： Anup P. Jose , Amir Amirkhany , Mohamed Elzeftawi
Abstract: A system and method for sensing drive current in a pixel. In some embodiments, the system includes: a first pixel, a second pixel, a differential sensing circuit, a reference current source, and a control circuit. The differential sensing circuit may have a first input, a second input, and an output, the first input being connected to a node at which a reference current generated by the reference current source is subtracted from a first pixel current, the first pixel current including a current generated by the first pixel. The second input may be configured to receive a second pixel current, the second pixel current including a current generated by the second pixel. The output may be configured to produce an output signal based on a difference between a current received at the first input and a current received at the second input.
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公开(公告)号：US20190288880A1
公开(公告)日：2019-09-19
申请号：US16054902
申请日：2018-08-03
Applicant: Samsung Display Co., Ltd.
Inventor： Mohamed Elzeftawi , Amir Amirkhany
IPC: H04L25/02 , H03K19/0185 , H03K19/00 , H03M1/00 , H03M1/68
Abstract: A method of performing coarse calibration of a voltage-mode (VM) driver having a plurality of driver slices connected in parallel includes setting a control code applied to activated driver slices of the plurality of driver slices to a maximum value to minimize an output resistance of the activated driver slices, activating one driver slice of the plurality of driver slices by applying the control code to the one driver slice, while disabling other driver slices of the plurality of driver slices, measuring an output resistance of the VM driver, determining whether the output resistance of the VM driver is greater than a desired resistance, and in response to determining that the output resistance of the VM driver is greater than a desired resistance activating one more driver slice of the plurality of driver slices.
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