Patents by Inventor Duane M. Petrovich
Duane M. Petrovich 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).
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Patent number: 11967291Abstract: 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 (LEDs). The backlight unit may determine the type of content in the image data. The backlight unit may decide to prioritize either mitigating halo or mitigating clipping based on the type of content. The determination of the type of content in the image data may be used to determine the brightness values for the LEDs in the LED array. If the content is determined to be a first type of content, at least one given LED in the LED array may have a different brightness value than if the content is determined to be a second, different type of content. Classifying content in the image data may be useful in optimizing visible artifacts such as visible halo and clipping.Type: GrantFiled: June 2, 2023Date of Patent: April 23, 2024Assignee: Apple Inc.Inventors: Mohammad Tofighi, Meng Cao, Pierre-Yves Emelie, Duane M Petrovich, Shuo Han, Zhendong Hong, Tobias Jung, Marc Albrecht, Jiulong Shan, Wei H Yao
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Publication number: 20240005711Abstract: A method for selectively granting access to an access-controlled space includes obtaining an image of the person requesting access using a camera that is located inside the access-controlled space, and permitting an authorized user of the access-controlled space to grant authorization using the image.Type: ApplicationFiled: June 27, 2023Publication date: January 4, 2024Inventors: Ryan J. Dunn, Duane M. Petrovich, Eric L. Chien, Julia M. Sohnen, Nicholas A. Sims, Ryan J. Garrone, Sarah E. Carey, Devyn M. Byrnes
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Patent number: 10964275Abstract: 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: GrantFiled: May 21, 2019Date of Patent: March 30, 2021Assignee: 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
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Publication number: 20200335047Abstract: 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: ApplicationFiled: May 21, 2019Publication date: October 22, 2020Inventors: 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
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Patent number: 10643549Abstract: 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: GrantFiled: November 5, 2019Date of Patent: May 5, 2020Assignee: Apple Inc.Inventors: Tobias Jung, Marc Albrecht, Duane M. Petrovich, Sean C. Chang, David S. Zalatimo, Pierre-Yves Emelie, Manev Luthra, Chengrui Le, Lingyu Hong, Wei H. Yao
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Patent number: 10571744Abstract: 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: GrantFiled: April 18, 2019Date of Patent: February 25, 2020Assignee: Apple Inc.Inventors: Sean C. Chang, Tobias Jung, Marc Albrecht, Abdeslam Hafidi, Jun Qi, Duane M. Petrovich, Mingxia Gu, Xiang Fang, Pierre-Yves Emelie, Wei H Yao
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Patent number: 10504453Abstract: 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: GrantFiled: April 18, 2019Date of Patent: December 10, 2019Assignee: Apple Inc.Inventors: Tobias Jung, Marc Albrecht, Duane M. Petrovich, Sean C. Chang, David S. Zalatimo, Pierre-Yves Emelie, Manev Luthra, Chengrui Le, Lingyu Hong, Wei H. Yao