Patents by Inventor Andrei E. Toma

Andrei E. Toma 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: 10964275
    Abstract: A display may have a pixel array such as a liquid crystal pixel array. The pixel array may be illuminated by a backlight unit that includes an array of light-emitting diodes. A backlight brightness selection circuit may select brightness values for the light-emitting diodes. The backlight brightness selection circuit may select the brightness values based on image data, based on brightness values used in previous image frames, based on device information, and/or based on sensor information. The backlight brightness selection circuit may select the backlight brightness levels to mitigate visible artifacts such as flickering and halo. The backlight levels selected by the backlight brightness selection may be modified by a power consumption compensation circuit. The power consumption compensation circuit may estimate the amount of power consumption required to operate the backlight using the target brightness levels and may modify the target brightness levels to meet maximum power consumption requirements.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: March 30, 2021
    Assignee: Apple Inc.
    Inventors: Duane M. Petrovich, Sean C. Chang, Tobias Jung, Pierre-Yves Emelie, Marc Albrecht, Chen Zheng, Andrei E. Toma, Kevin W. Sliech, Mingxia Gu, Wei H. Yao
  • Publication number: 20200335047
    Abstract: A display may have a pixel array such as a liquid crystal pixel array. The pixel array may be illuminated by a backlight unit that includes an array of light-emitting diodes. A backlight brightness selection circuit may select brightness values for the light-emitting diodes. The backlight brightness selection circuit may select the brightness values based on image data, based on brightness values used in previous image frames, based on device information, and/or based on sensor information. The backlight brightness selection circuit may select the backlight brightness levels to mitigate visible artifacts such as flickering and halo. The backlight levels selected by the backlight brightness selection may be modified by a power consumption compensation circuit. The power consumption compensation circuit may estimate the amount of power consumption required to operate the backlight using the target brightness levels and may modify the target brightness levels to meet maximum power consumption requirements.
    Type: Application
    Filed: May 21, 2019
    Publication date: October 22, 2020
    Inventors: Duane M. Petrovich, Sean C. Chang, Tobias Jung, Pierre-Yves Emelie, Marc Albrecht, Chen Zheng, Andrei E. Toma, Kevin W. Sliech, Mingxia Gu, Wei H. Yao
  • Patent number: 8654858
    Abstract: A data stream encoder eliminates duplicate transmission units in a transmitted data stream in which the detected duplicate may not be the immediately preceding transmission unit. A data aggregator transmits a stream of data by identifying a frame interval, or timing interval, corresponding to the time to send a frame of data in the stream. Each of the frames includes a predetermined number of blocks. Configurations identify repetition patterns in the blocks of successive frames, thus looking backward a frame interval to identify a previous corresponding block in the preceding frame. The corresponding transmission block need not be the immediately preceding block or transmission unit. For certain types of data, successive frames exhibit the same or similar patterns in the blocks of data defining the frame. Therefore, the encoder identifies duplicate blocks in successive frames, and transmits only the blocks that differ from a counterpart block in the previous frame.
    Type: Grant
    Filed: August 18, 2006
    Date of Patent: February 18, 2014
    Assignee: Comtech EF Data Corp.
    Inventor: Andrei E. Toma
  • Patent number: 7720094
    Abstract: Wireless network demands continually increase as wireless service providers pursue additional service capabilities. In a cellular communication system, leased lines between remote cell sites and the corresponding Mobile Switching Offices (MSOs) remain a major operating cost. Bandwidth reduction by identification and elimination of payload data and control information which need not be fully replicated because it can be deduced from information accessible or previously transmitted allows fewer lines to support the same bandwidth. A wireless access gateway is operable to aggregate such redundant and regenerable data on a backhaul link between a wireless cell site and the corresponding mobile switching office (MSO) to provide low-latency, type specific lossless bandwidth reduction. The wireless access gateway identifies regenerable information and eliminates portions of the data which the device need not transmit because the data is redundant, or accessible or recreatable, at the receiving side.
    Type: Grant
    Filed: February 21, 2006
    Date of Patent: May 18, 2010
    Assignee: Verso Backhaul Solutions, Inc.
    Inventors: R. Brough Turner, Kevin J. Breummer, Michael R. Matatia, Andrei E. Toma, Svetlana O. Sokolova
  • Patent number: 7072296
    Abstract: Wireless network demands continually increase as wireless service providers pursue additional service capabilities. In a cellular communication system, leased lines between remote cell sites and the corresponding Mobile Switching Offices (MSOs) remain a major operating cost. Bandwidth reduction by identification and elimination of payload data and control information which need not be fully replicated because it can be deduced from information accessible or previously transmitted allows fewer lines to support the same bandwidth. A wireless access gateway is operable to aggregate such redundant and regenerable data on a backhaul link between a wireless cell site and the corresponding mobile switching office (MSO) to provide low-latency, type specific lossless bandwidth reduction. The wireless access gateway identifies regenerable information and eliminates portions of the data which the device need not transmit because the data is redundant, or accessible or recreatable, at the receiving side.
    Type: Grant
    Filed: August 1, 2003
    Date of Patent: July 4, 2006
    Assignee: NMS Communications Corporation
    Inventors: R. Brough Turner, Kevin J. Bruemmer, Michael R. Matatia, Andrei E. Toma, Aram Falsafi, Svetlana O. Sokolova, Murtaza Amiji, Charles C. Linton, James M. Van Donsel, Benoit Delorme, Paul Trudel, David Ouellet, Jean-Hugues Deschenes, Daniel F. Daly
  • Publication number: 20040077345
    Abstract: Wireless network demands continually increase as wireless service providers pursue additional service capabilities. In a cellular communication system, leased lines between remote cell sites and the corresponding Mobile Switching Offices (MSOs) remain a major operating cost. Bandwidth reduction by identification and elimination of payload data and control information which need not be fully replicated because it can be deduced from information accessible or previously transmitted allows fewer lines to support the same bandwidth. A wireless access gateway is operable to aggregate such redundant and regenerable data on a backhaul link between a wireless cell site and the corresponding mobile switching office (MSO) to provide low-latency, type specific lossless bandwidth reduction. The wireless access gateway identifies regenerable information and eliminates portions of the data which the device need not transmit because the data is redundant, or accessible or recreatable, at the receiving side.
    Type: Application
    Filed: August 1, 2003
    Publication date: April 22, 2004
    Inventors: R. Brough Turner, Kevin J. Bruemmer, Michael R. Matatia, Andrei E. Toma, Aram Falsafi, Svetlana O. Sokolova, Murtaza Amiji, Charles C. Linton, James M. Van Donsel, Benoit Delorme, Paul Trudel, David Ouellet, Jean-Hugues Deschenes, Daniel F. Daly