Patents by Inventor Mahdi Farrokh-Baroughi

Mahdi Farrokh-Baroughi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11056041
    Abstract: Display panel redundancy schemes and methods of operation are described. In an embodiment, and display panel includes an array of drivers (e.g. microdrivers), each of which including multiple portions to independently receive control and pixel bits. In an embodiment, each driver portion is to control a group of redundant emission elements.
    Type: Grant
    Filed: November 19, 2019
    Date of Patent: July 6, 2021
    Inventors: Kapil V. Sakariya, Tore Nauta, Hopil Bae, Henry C. Jen, James E. Pedder, Sunggu Kang, Shingo Hatanaka, Xiang Lu, Mahdi Farrokh Baroughi, Hasan Akyol, Saif Choudhary, Ion Bita
  • Publication number: 20210166609
    Abstract: Hybrid architectures and method methods of operating a display panel are described. In an embodiment, row driver and pixel driver functions are combined in a group of backbone hybrid pixel driver chips, wherein global signal lines are distributed to the backbone hybrid pixel driver chips, where the global signals are manipulated and distributed to a row of pixel driver chips.
    Type: Application
    Filed: November 4, 2020
    Publication date: June 3, 2021
    Inventors: Xiang Lu, Mahdi Farrokh Baroughi, Xiaofeng Wang, Derek K. Shaeffer, Henry C. Jen, Hopil Bae
  • Patent number: 10997899
    Abstract: An electronic display includes emission clock routing without the use of repeaters. This may be accomplished by providing row drivers for each emission clock signal on opposing edges of the display panel, so that each set of row drivers may provide the emission clock signal to only a portion of the micro-drivers in each row. The array of micro-drivers may be further segmented (e.g., into four or more sections, an alternating pattern, uneven sections, etc.) to provide similar advantages. Furthermore, rather than using multiplexors to provide the emission clock signals to the row drivers, the emission clock may be hardwired to the row drivers. This may reduce the number of pins and support the provision of more phases.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: May 4, 2021
    Assignee: Apple Inc.
    Inventors: Hopil Bae, Mahdi Farrokh Baroughi, Mohammad B. Vahid Far
  • Publication number: 20210056930
    Abstract: An electronic device may include an electronic display having multiple display pixels. The display pixels may illuminate at a target luminance based at least in part on a first analog voltage signal. The electronic device may also include an electrical bus configured to generate multiple analog voltage signals including the first analog voltage signal, which is output on an output of the electrical bus. The electrical bus may include a digital to analog converter to generate at least some of the analog voltage signals and multiple output buffers to buffer the analog voltage signals. The outputs may be buffered by an output buffer of the output buffers.
    Type: Application
    Filed: July 14, 2020
    Publication date: February 25, 2021
    Inventors: Jaeyoung Kang, Jesse Aaron Richmond, Mahdi Farrokh Baroughi, Hopil Bae, John T. Wetherell, Kingsuk Brahma, Yuichi Okuda, Shingo Hatanaka, Baris Cagdaser, Myungjoon Choi, Jie Won Ryu, Hyunwoo Nho, Yafei Bi, Wei H. Yao, Henry C. Jen, Derek Keith Shaeffer
  • Patent number: 10930201
    Abstract: Methods and systems for testing a display having an array of microdrivers arranged in multiple of rows and columns including setting a testing mode of a microdriver of the array of microdrivers using multiple pins of the microdriver that are used in scanning or operation modes of the microdriver. The microdriver is configured to light one or more connected micro light emitting diode pixels coupled to the microdriver during the testing mode. Testing also includes operating the microdriver in the testing mode and determining functionality of the one or more connected micro light emitting diode pixels or the microdriver based on the testing mode.
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: February 23, 2021
    Assignee: Apple Inc.
    Inventors: Mahdi Farrokh Baroughi, Bo Yang, Xiang Lu, Hopil Bae
  • Patent number: 10923016
    Abstract: A display device may include pixels that display image data. The display device may also include a circuit that receives pixel data having a gray level for at least one pixel, such that the pixel data corresponds to a frame of the image data and the frame includes sub-frames. The pixel data causes the circuit to provide at least one current pulse to the at least one pixel according to a first order of the sub-frames. The circuit may also receive a second order of the sub-frames, such that the second order is mapped with respect to the first order, and at least one current pulse is provided to the at least one pixel according to the second order. As such, visual artifacts depicted on the display are reduced.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: February 16, 2021
    Assignee: Apple Inc.
    Inventors: Mohammad B. Vahid Far, Tore Nauta, Hopil Bae, Mahdi Farrokh Baroughi, Jun Li
  • Patent number: 10891882
    Abstract: The present techniques are capable of identifying and pinpointing defective microdrivers and/or row/column drivers either before or after any ?LEDs have been placed on the display. Using the architectures described herein, test data may be delivered in a parallel fashion to the drivers from support circuitry, such as a timing controller and/or a main board, and outputs based on the test data may be similarly delivered back to the support circuitry do determine which drivers are defective. This yields access to the output of every microdriver and row drier, thus enabling the identification of specific defective elements.
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: January 12, 2021
    Assignee: Apple Inc.
    Inventors: Mahdi Farrokh Baroughi, Mohammad B. Vahid Far, Xiang Lu, Bo Yang, Derek K. Shaeffer, Henry C. Jen, Hopil Bae
  • Patent number: 10885852
    Abstract: An electronic device includes a display having an active array and a reference array. The active array includes a pixel and the reference array includes a reference pixel. The electronic device also includes processing circuitry communicatively coupled to the display. The processing circuitry is configured to instruct the active array to drive the pixel based at least in part on a set of degradation ratios and gamma tap points for each brightness setting of the display based at least in part on a reconstructed current-voltage curve.
    Type: Grant
    Filed: June 4, 2020
    Date of Patent: January 5, 2021
    Assignee: Apple Inc.
    Inventors: Sheng Zhang, Chih-Wei Yeh, Yunhui Hou, Chaohao Wang, Wei H. Yao, Paolo Sacchetto, Derek K. Shaeffer, Henry C. Jen, Shingo Hatanaka, Hasan Akyol, Mahdi Farrokh Baroughi, Hopil Bae
  • Patent number: 10854129
    Abstract: Hybrid architectures and method methods of operating a display panel are described. In an embodiment, row driver and pixel driver functions are combined in a group of backbone hybrid pixel driver chips, wherein global signal lines are distributed to the backbone hybrid pixel driver chips, where the global signals are manipulated and distributed to a row of pixel driver chips.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: December 1, 2020
    Assignee: Apple Inc.
    Inventors: Xiang Lu, Mahdi Farrokh Baroughi, Xiaofeng Wang, Derek K. Shaeffer, Henry C. Jen, Hopil Bae
  • Publication number: 20200302871
    Abstract: An electronic device includes a display having an active array and a reference array. The active array includes a pixel and the reference array includes a reference pixel. The electronic device also includes processing circuitry communicatively coupled to the display. The processing circuitry is configured to instruct the active array to drive the pixel based at least in part on a set of degradation ratios and gamma tap points for each brightness setting of the display based at least in part on a reconstructed current-voltage curve.
    Type: Application
    Filed: June 4, 2020
    Publication date: September 24, 2020
    Inventors: Sheng Zhang, Chih-Wei Yeh, Yunhui Hou, Chaohao Wang, Wei H. Yao, Paolo Sacchetto, Derek K. Shaeffer, Henry C. Jen, Shingo Hatanaka, Hasan Akyol, Mahdi Farrokh Baroughi, Hopil Bae
  • Patent number: 10714011
    Abstract: A mobile electronic device includes a display having an active array and a reference array. The active array includes a pixel and the reference array includes a reference pixel. The mobile electronic device also includes processing circuitry communicatively coupled to the display. The processing circuitry is configured to instruct the active array to drive the pixel based at least in part on a current-voltage relationship of the pixel and a reference current-voltage relationship of the reference pixel.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: July 14, 2020
    Assignee: Apple Inc.
    Inventors: Sheng Zhang, Chih-Wei Yeh, Yunhui Hou, Chaohao Wang, Wei H. Yao, Paolo Sacchetto, Derek K. Shaeffer, Henry C. Jen, Shingo Hatanaka, Hasan Akyol, Mahdi Farrokh Baroughi, Hopil Bae
  • Patent number: 10650741
    Abstract: An electronic device includes a display having a reference array that includes a first pixel. The display also includes a first emission power supply coupled to the first pixel. The display further includes an active array having a second pixel. The display also includes a second emission power supply coupled to the second pixel.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: May 12, 2020
    Assignee: Apple Inc.
    Inventors: Sheng Zhang, Chengrui Le, Hopil Bae, Mahdi Farrokh Baroughi, David W. Lum, Adam Adjiwibawa, Chaohao Wang, Paolo Sacchetto, Wei H. Yao, Enkhamgalan Dorjgotov, Michael Slootsky, Giovanni Carbone, Derek K. Shaeffer, Henry C. Jen, Shingo Hatanaka, Hasan Akyol
  • Publication number: 20200090574
    Abstract: Display panel redundancy schemes and methods of operation are described. In an embodiment, and display panel includes an array of drivers (e.g. microdrivers), each of which including multiple portions to independently receive control and pixel bits. In an embodiment, each driver portion is to control a group of redundant emission elements.
    Type: Application
    Filed: November 19, 2019
    Publication date: March 19, 2020
    Inventors: Kapil V. SAKARIYA, Tore NAUTA, Hopil BAE, Henry C. JEN, James E. PEDDER, Sunggu KANG, Shingo HATANAKA, Xiang LU, Mahdi Farrokh BAROUGHI, Hasan AKYOL, Saif CHOUDHARY, Ion BITA
  • Patent number: 10535296
    Abstract: Display panel redundancy schemes and methods of operation are described. In an embodiment, and display panel includes an array of drivers (e.g. microdrivers), each of which including multiple portions to independently receive control and pixel bits. In an embodiment, each driver portion is to control a group of redundant emission elements.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: January 14, 2020
    Assignee: Apple Inc.
    Inventors: Kapil V. Sakariya, Tore Nauta, Hopil Bae, Henry C. Jen, James E. Pedder, Sunggu Kang, Shingo Hatanaka, Xiang Lu, Mahdi Farrokh Baroughi, Hasan Akyol, Saif Choudhary, Ion Bita
  • Publication number: 20190385509
    Abstract: Hybrid architectures and method methods of operating a display panel are described. In an embodiment, row driver and pixel driver functions are combined in a group of backbone hybrid pixel driver chips, wherein global signal lines are distributed to the backbone hybrid pixel driver chips, where the global signals are manipulated and distributed to a row of pixel driver chips.
    Type: Application
    Filed: March 18, 2019
    Publication date: December 19, 2019
    Inventors: Xiang Lu, Mahdi Farrokh Baroughi, Xiaofeng Wang, Derek K. Shaeffer, Henry C. Jen, Hopil Bae
  • Publication number: 20190347985
    Abstract: Local passive matrix displays and methods of operation are described. In an embodiment, the display includes a pixel driver chip coupled with a matrix of rows and columns of LEDs. The pixel driver chips may be arranged in rows across the display with separate portions to operate separate matrices of LEDs.
    Type: Application
    Filed: February 11, 2019
    Publication date: November 14, 2019
    Inventors: Derek K. Shaeffer, Mahdi Farrokh Baroughi, Xiaofeng Wang, Sam S. Li, John T. Wetherell, Henry C. Jen, Xiang Lu, Hasan Akyol, Hopil Bae, Xiang Fang, Hjalmar Edzer Ayco Huitema, Tore Nauta
  • Publication number: 20190279553
    Abstract: A display device may include pixels that display image data. The display device may also include a circuit that receives pixel data having a gray level for at least one pixel, such that the pixel data corresponds to a frame of the image data and the frame includes sub-frames. The pixel data causes the circuit to provide at least one current pulse to the at least one pixel according to a first order of the sub-frames. The circuit may also receive a second order of the sub-frames, such that the second order is mapped with respect to the first order, and at least one current pulse is provided to the at least one pixel according to the second order. As such, visual artifacts depicted on the display are reduced.
    Type: Application
    Filed: September 13, 2017
    Publication date: September 12, 2019
    Inventors: Mohammad B. Vahid Far, Tore Nauta, Hopil Bae, Mahdi Farrokh Baroughi, Jun Li
  • Publication number: 20190088204
    Abstract: A mobile electronic device includes a display having an active array and a reference array. The active array includes a pixel and the reference array includes a reference pixel. The mobile electronic device also includes processing circuitry communicatively coupled to the display. The processing circuitry is configured to instruct the active array to drive the pixel based at least in part on a current-voltage relationship of the pixel and a reference current-voltage relationship of the reference pixel.
    Type: Application
    Filed: September 14, 2018
    Publication date: March 21, 2019
    Inventors: Sheng Zhang, Chih-Wei Yeh, Yunhui Hou, Chaohao Wang, Wei H. Yao, Paolo Sacchetto, Derek K. Shaeffer, Henry C. Jen, Shingo Hatanaka, Hasan Akyol, Mahdi Farrokh Baroughi, Hopil Bae
  • Publication number: 20190088199
    Abstract: An electronic device includes a display having a reference array that includes a first pixel. The display also includes a first emission power supply coupled to the first pixel. The display further includes an active array having a second pixel. The display also includes a second emission power supply coupled to the second pixel.
    Type: Application
    Filed: September 14, 2018
    Publication date: March 21, 2019
    Inventors: Sheng Zhang, Chengrui Le, Hopil Bae, Mahdi Farrokh Baroughi, David W. Lum, Adam Adjiwibawa, Chaohao Wang, Paolo Sacchetto, Wei H. Yao, Enkhamgalan Dorjgotov, Michael Slootsky, Giovanni Carbone, Derek K. Shaeffer, Henry C. Jen, Shingo Hatanaka, Hasan Akyol
  • Publication number: 20180211582
    Abstract: Display panel redundancy schemes and methods of operation are described. In an embodiment, and display panel includes an array of drivers (e.g. microdrivers), each of which including multiple portions to independently receive control and pixel bits. In an embodiment, each driver portion is to control a group of redundant emission elements.
    Type: Application
    Filed: May 27, 2016
    Publication date: July 26, 2018
    Applicant: Apple Inc.
    Inventors: Kapil V. SAKARIYA, Tore NAUTA, Hopil BAE, Henry C. JEN, James E. PEDDER, Sunggu KANG, Shingo HATANAKA, Xiang LU, Mahdi Farrokh BAROUGHI, Hasan AKYOL, Saif CHOUDHARY, Ion BITA