Patents by Inventor Fan Gui
Fan Gui 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: 11887546Abstract: A display pixel is provided that is operable to support hybrid compensation scheme having both in-pixel threshold voltage canceling and external threshold voltage compensation. The display may include multiple p-type silicon transistors with at least one n-type semiconducting-oxide transistor and one storage capacitor. An on-bias stress phase may be performed prior to a threshold voltage sampling and data programming phase to mitigate hysteresis and improve first frame response. In low refresh rate displays, a first additional on-bias stress operation can be performed separate from the threshold voltage sampling and data programming phase during a refresh frame and a second additional on-bias stress operation can be performed during a vertical blanking frame. The display pixel may be configured to receive an initialization voltage and an anode reset voltage, either of which can be dynamically tuned to match the stress of the first and second additional on-bias stress operations to minimize flicker.Type: GrantFiled: March 30, 2023Date of Patent: January 30, 2024Assignee: Apple Inc.Inventors: Chin-Wei Lin, Shinya Ono, Zino Lee, Yun Wang, Fan Gui
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Patent number: 11854490Abstract: To reduce the amount of space occupied in the inactive area of a display by gate driver circuitry, at least a portion of the gate driver circuitry may be positioned in the active area of the display. To accommodate the gate driver circuitry, emissive sub-pixels may be laterally shifted relative to corresponding thin-film transistor sub-pixels. This allows for the thin-film transistor sub-pixels to be grouped adjacent to the central area of the active area, leaving room along an edge of the active area to accommodate one or more additional display components such as gate driver circuitry or fanout portions of data lines.Type: GrantFiled: August 2, 2022Date of Patent: December 26, 2023Assignee: Apple Inc.Inventors: Levent Erdal Aygun, Chin-Wei Lin, Yun Wang, Xin Lin, Aida R Colon-Berrios, Shih Chang Chang, Fan Gui, Mohammad Reza Esmaeili Rad, Ran Tu, Warren S Rieutort-Louis, Abbas Jamshidi Roudbari, Bhadrinarayana Lalgudi Visweswaran, Cheng-Chih Hsieh, Ricardo A Peterson, Shyuan Yang, Ting-Kuo Chang, Tsung-Ting Tsai, Yuchi Che
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Publication number: 20230237965Abstract: A display pixel is provided that is operable to support hybrid compensation scheme having both in-pixel threshold voltage canceling and external threshold voltage compensation. The display may include multiple p-type silicon transistors with at least one n-type semiconducting-oxide transistor and one storage capacitor. An on-bias stress phase may be performed prior to a threshold voltage sampling and data programming phase to mitigate hysteresis and improve first frame response. In low refresh rate displays, a first additional on-bias stress operation can be performed separate from the threshold voltage sampling and data programming phase during a refresh frame and a second additional on-bias stress operation can be performed during a vertical blanking frame. The display pixel may be configured to receive an initialization voltage and an anode reset voltage, either of which can be dynamically tuned to match the stress of the first and second additional on-bias stress operations to minimize flicker.Type: ApplicationFiled: March 30, 2023Publication date: July 27, 2023Inventors: Chin-Wei Lin, Shinya Ono, Zino Lee, Yun Wang, Fan Gui
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Patent number: 11651736Abstract: A display pixel is provided that is operable to support hybrid compensation scheme having both in-pixel threshold voltage canceling and external threshold voltage compensation. The display may include multiple p-type silicon transistors with at least one n-type semiconducting-oxide transistor and one storage capacitor. An on-bias stress phase may be performed prior to a threshold voltage sampling and data programming phase to mitigate hysteresis and improve first frame response. In low refresh rate displays, a first additional on-bias stress operation can be performed separate from the threshold voltage sampling and data programming phase during a refresh frame and a second additional on-bias stress operation can be performed during a vertical blanking frame. The display pixel may be configured to receive an initialization voltage and an anode reset voltage, either of which can be dynamically tuned to match the stress of the first and second additional on-bias stress operations to minimize flicker.Type: GrantFiled: February 24, 2022Date of Patent: May 16, 2023Assignee: Apple Inc.Inventors: Chin-Wei Lin, Shinya Ono, Zino Lee, Yun Wang, Fan Gui
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Publication number: 20230081342Abstract: A display may include an array of pixels. Each pixel in the array may include a drive transistor, emission transistors, a data loading transistor, a gate voltage setting transistor, an initialization transistor, an anode reset transistor, a storage capacitor, and an optional current boosting capacitor coupled in series with an isolation transistor. A data refresh may include a initialization phase, a threshold voltage sampling phase, and a data programming phase. The threshold voltage sampling phase can be substantially longer than the data programming phase to decrease a current sampling level during the threshold voltage sampling phase, which helps reduce the display luminance sensitivity to temperature variations. During a data refresh, the isolation transistor can be turned on to provide current boosting. During emission periods, the isolation transistor is turned off to prevent cathode noise from potentially coupling through to one or more direct-current voltage nodes in the pixel.Type: ApplicationFiled: July 7, 2022Publication date: March 16, 2023Inventors: Chin-Wei Lin, Aida R Colon-Berrios, Fan Gui, Levent Erdal Aygun, Mohammad Reza Esmaeili Rad, Ran Tu, Xin Lin, Yun Wang
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Patent number: 11592873Abstract: In some embodiments, a display stack includes a set of light-emitting elements, and a display backplane that includes a set of conductors and is electrically coupled to the set of light-emitting elements. A conductor in the set of conductors has a length, and a curved edge extending along at least a portion of the length. In some embodiments, a display stack includes a set of light-emitting elements; a set of transistors, electrically coupled to the set of light-emitting elements; and a set of conductors, electrically coupled to the set of transistors. The set of transistors may be electrically coupled to the set of conductors at a set of conductive pads. A plurality of conductive pads in the set of conductive pads is coupled to a single conductor in the set of conductors. The single conductor approaches different conductive pads in the plurality of conductive pads at different angles.Type: GrantFiled: February 14, 2020Date of Patent: February 28, 2023Assignee: Apple Inc.Inventors: Xiao Xiang, Tong Chen, Fan Gui, Mark T. Winkler, Ran Tu, Tsu-Hui Lin, Wenrui Cai, Yun Wang
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Publication number: 20220180812Abstract: A display pixel is provided that is operable to support hybrid compensation scheme having both in-pixel threshold voltage canceling and external threshold voltage compensation. The display may include multiple p-type silicon transistors with at least one n-type semiconducting-oxide transistor and one storage capacitor. An on-bias stress phase may be performed prior to a threshold voltage sampling and data programming phase to mitigate hysteresis and improve first frame response. In low refresh rate displays, a first additional on-bias stress operation can be performed separate from the threshold voltage sampling and data programming phase during a refresh frame and a second additional on-bias stress operation can be performed during a vertical blanking frame. The display pixel may be configured to receive an initialization voltage and an anode reset voltage, either of which can be dynamically tuned to match the stress of the first and second additional on-bias stress operations to minimize flicker.Type: ApplicationFiled: February 24, 2022Publication date: June 9, 2022Inventors: Chin-Wei Lin, Shinya Ono, Zino Lee, Yun Wang, Fan Gui
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Patent number: 11282462Abstract: A display pixel is provided that is operable to support hybrid compensation scheme having both in-pixel threshold voltage canceling and external threshold voltage compensation. The display may include multiple p-type silicon transistors with at least one n-type semiconducting-oxide transistor and one storage capacitor. An on-bias stress phase may be performed prior to a threshold voltage sampling and data programming phase to mitigate hysteresis and improve first frame response. In low refresh rate displays, a first additional on-bias stress operation can be performed separate from the threshold voltage sampling and data programming phase during a refresh frame and a second additional on-bias stress operation can be performed during a vertical blanking frame. The display pixel may be configured to receive an initialization voltage and an anode reset voltage, either of which can be dynamically tuned to match the stress of the first and second additional on-bias stress operations to minimize flicker.Type: GrantFiled: October 5, 2020Date of Patent: March 22, 2022Assignee: Apple Inc.Inventors: Chin-Wei Lin, Shinya Ono, Zino Lee, Yun Wang, Fan Gui
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Patent number: 11227536Abstract: A system includes an electronic display panel that has a plurality of pixels configured to depict frames of image data. The electronic display also includes display driver circuitry configured to, for a first frame of image data representing first image content, modify a gate-to-source voltage of a transistor of a first pixel of the plurality of pixels to a content-dependent first gate-to-source voltage. Additionally, after modifying the gate-to-source voltage to the first gate-to-source voltage, the display driver circuitry is configured to program the first pixel by modifying the gate-to-source voltage to a gate-to-source programming voltage that differs from the first gate-to-source voltage and is based on image data associated with the pixel from the first frame of the image data. Furthermore, the display driver circuitry is configured to cause the plurality of pixels to emit light.Type: GrantFiled: January 17, 2020Date of Patent: January 18, 2022Assignee: Apple Inc.Inventors: Xin Lin, Yun Wang, Chin-Wei Lin, Majid Gharghi, Fan Gui, Chen-Ming Chen, Jie Won Ryu, Hyunwoo Nho, Alex H. Pai, Kingsuk Brahma, Junhua Tan, Szu Heng Tseng
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Patent number: 11158256Abstract: A display may include an array of organic light-emitting diode display pixels having transistors characterized by threshold voltages subject to transistor variations. Compensation circuitry may be used to sense a current from selected display pixels. A display pixel may include a drive transistor, a gate setting transistor for driving a reference voltage onto the gate terminal of the drive transistor, a data loading and current sensing transistor for connecting the drive transistor to a data/current-sensing line, a light-emitting diode, an emission control transistor coupled between the drive transistor and the diode, and an anode resetting transistor for selectively resetting the anode terminal of the diode. During in-frame current sensing operations, the emission control transistor may be turned off to decouple the drive transistor from the diode, thereby blocking off any residue current and lateral leakage current that may be present at the diode.Type: GrantFiled: September 28, 2018Date of Patent: October 26, 2021Assignee: Apple Inc.Inventors: Chin-Wei Lin, Fan Gui, Hung Sheng Lin, Hyunwoo Nho, Jie Won Ryu, Junhua Tan, Kingsuk Brahma, Majid Gharghi, Mohammad Reza Esmaeili Rad, Shinya Ono, Yun Wang, Zino Lee
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Publication number: 20210255668Abstract: In some embodiments, a display stack includes a set of light-emitting elements, and a display backplane that includes a set of conductors and is electrically coupled to the set of light-emitting elements. A conductor in the set of conductors has a length, and a curved edge extending along at least a portion of the length. In some embodiments, a display stack includes a set of light-emitting elements; a set of transistors, electrically coupled to the set of light-emitting elements; and a set of conductors, electrically coupled to the set of transistors. The set of transistors may be electrically coupled to the set of conductors at a set of conductive pads. A plurality of conductive pads in the set of conductive pads is coupled to a single conductor in the set of conductors. The single conductor approaches different conductive pads in the plurality of conductive pads at different angles.Type: ApplicationFiled: February 14, 2020Publication date: August 19, 2021Inventors: Xiao Xiang, Tong Chen, Fan Gui, Mark T. Winkler, Ran Tu, Tsu-Hui Lin, Wenrui Cai, Yun Wang
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Patent number: 10923022Abstract: A display is provided that includes an array of display pixels that receive data signals from display driver circuitry and that receive control signals from gate driver circuitry. The gate driver circuitry may include a chain of row driver circuits. Each row driver circuit in the chain of row driver circuits may include a master driver stage, a slave driver stage, and associated control circuitry configured to receive a clock signal and a pulse signal from a preceding row driver in the chain. The master driver stage may be biased using fixed nominal power supply voltages, whereas the slave driver stage may be biased using dynamically adjustable power supply voltages that are optionally reduced relative to that of the nominal power supply voltages. One or more of the master and slave driver stages may be a bootstrapping driver stage having a bootstrapping capacitor.Type: GrantFiled: November 22, 2019Date of Patent: February 16, 2021Assignee: Apple Inc.Inventors: Chin-Wei Lin, Fan Gui, Gihoon Choo
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Patent number: 10916198Abstract: A display pixel is provided that is operable to support hybrid compensation scheme having both in-pixel threshold voltage canceling and external threshold voltage compensation. The display may include multiple p-type silicon transistors with at least one n-type semiconducting-oxide transistor and one storage capacitor. An on-bias stress phase may be performed prior to a threshold voltage sampling and data programming phase to mitigate hysteresis and improve first frame response. In low refresh rate displays, a first additional on-bias stress operation can be performed separate from the threshold voltage sampling and data programming phase during a refresh frame and a second additional on-bias stress operation can be performed during a vertical blanking frame. The display pixel may be configured to receive an initialization voltage and an anode reset voltage, either of which can be dynamically tuned to match the stress of the first and second additional on-bias stress operations to minimize flicker.Type: GrantFiled: December 17, 2019Date of Patent: February 9, 2021Assignee: Apple Inc.Inventors: Chin-Wei Lin, Shinya Ono, Zino Lee, Yun Wang, Fan Gui
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Publication number: 20210020109Abstract: A display pixel is provided that is operable to support hybrid compensation scheme having both in-pixel threshold voltage canceling and external threshold voltage compensation. The display may include multiple p-type silicon transistors with at least one n-type semiconducting-oxide transistor and one storage capacitor. An on-bias stress phase may be performed prior to a threshold voltage sampling and data programming phase to mitigate hysteresis and improve first frame response. In low refresh rate displays, a first additional on-bias stress operation can be performed separate from the threshold voltage sampling and data programming phase during a refresh frame and a second additional on-bias stress operation can be performed during a vertical blanking frame. The display pixel may be configured to receive an initialization voltage and an anode reset voltage, either of which can be dynamically tuned to match the stress of the first and second additional on-bias stress operations to minimize flicker.Type: ApplicationFiled: October 5, 2020Publication date: January 21, 2021Inventors: Chin-Wei Lin, Shinya Ono, Zino Lee, Yun Wang, Fan Gui
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Publication number: 20210012712Abstract: A display may include an array of organic light-emitting diode display pixels having transistors characterized by threshold voltages subject to transistor variations. Compensation circuitry may be used to sense a current from selected display pixels. A display pixel may include a drive transistor, a gate setting transistor for driving a reference voltage onto the gate terminal of the drive transistor, a data loading and current sensing transistor for connecting the drive transistor to a data/current-sensing line, a light-emitting diode, an emission control transistor coupled between the drive transistor and the diode, and an anode resetting transistor for selectively resetting the anode terminal of the diode. During in-frame current sensing operations, the emission control transistor may be turned off to decouple the drive transistor from the diode, thereby blocking off any residue current and lateral leakage current that may be present at the diode.Type: ApplicationFiled: September 28, 2018Publication date: January 14, 2021Inventors: Chin-Wei Lin, Fan Gui, Hung Sheng Lin, Hyunwoo Nho, Jie Won Ryu, Junhua Tan, Kingsuk Brahma, Majid Gharghi, Mohammad Reza Esmaeili Rad, Shinya Ono, Yun Wang, Zino Lee
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Patent number: 10885850Abstract: A display pixel is provided that is operable to support hybrid compensation scheme having both in-pixel threshold voltage canceling and external threshold voltage compensation. The display may include multiple p-type silicon transistors with at least one n-type semiconducting-oxide transistor and one storage capacitor. An on-bias stress phase may be performed prior to a threshold voltage sampling and data programming phase to mitigate hysteresis and improve first frame response. In low refresh rate displays, a first additional on-bias stress operation can be performed separate from the threshold voltage sampling and data programming phase during a refresh frame and a second additional on-bias stress operation can be performed during a vertical blanking frame. The display pixel may be configured to receive an initialization voltage and an anode reset voltage, either of which can be dynamically tuned to match the stress of the first and second additional on-bias stress operations to minimize flicker.Type: GrantFiled: December 17, 2019Date of Patent: January 5, 2021Assignee: Apple Inc.Inventors: Chin-Wei Lin, Shinya Ono, Zino Lee, Yun Wang, Fan Gui
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Patent number: 10847095Abstract: A display pixel is provided that is operable to support hybrid compensation scheme having both in-pixel threshold voltage canceling and external threshold voltage compensation. The display may include multiple p-type silicon transistors with at least one n-type semiconducting-oxide transistor and one storage capacitor. An on-bias stress phase may be performed prior to a threshold voltage sampling and data programming phase to mitigate hysteresis and improve first frame response. In low refresh rate displays, a first additional on-bias stress operation can be performed separate from the threshold voltage sampling and data programming phase during a refresh frame and a second additional on-bias stress operation can be performed during a vertical blanking frame. The display pixel may be configured to receive an initialization voltage and an anode reset voltage, either of which can be dynamically tuned to match the stress of the first and second additional on-bias stress operations to minimize flicker.Type: GrantFiled: December 17, 2019Date of Patent: November 24, 2020Assignee: Apple Inc.Inventors: Chin-Wei Lin, Shinya Ono, Zino Lee, Yun Wang, Fan Gui
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Publication number: 20200302856Abstract: A system includes an electronic display panel that has a plurality of pixels configured to depict frames of image data. The electronic display also includes display driver circuitry configured to, for a first frame of image data representing first image content, modify a gate-to-source voltage of a transistor of a first pixel of the plurality of pixels to a content-dependent first gate-to-source voltage. Additionally, after modifying the gate-to-source voltage to the first gate-to-source voltage, the display driver circuitry is configured to program the first pixel by modifying the gate-to-source voltage to a gate-to-source programming voltage that differs from the first gate-to-source voltage and is based on image data associated with the pixel from the first frame of the image data. Furthermore, the display driver circuitry is configured to cause the plurality of pixels to emit light.Type: ApplicationFiled: January 17, 2020Publication date: September 24, 2020Inventors: Xin Lin, Yun Wang, Chin-Wei Lin, Majid Gharghi, Fan Gui, Chen-Ming Chen, Jie Won Ryu, Hyunwoo Nho, Alex H. Pai, Kingsuk Brahma, Junhua Tan, Szu Heng Tseng
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Publication number: 20200251044Abstract: A display is provided that includes an array of display pixels that receive data signals from display driver circuitry and that receive control signals from gate driver circuitry. The gate driver circuitry may include a chain of row driver circuits. Each row driver circuit in the chain of row driver circuits may include a master driver stage, a slave driver stage, and associated control circuitry configured to receive a clock signal and a pulse signal from a preceding row driver in the chain. The master driver stage may be biased using fixed nominal power supply voltages, whereas the slave driver stage may be biased using dynamically adjustable power supply voltages that are optionally reduced relative to that of the nominal power supply voltages. One or more of the master and slave driver stages may be a bootstrapping driver stage having a bootstrapping capacitor.Type: ApplicationFiled: November 22, 2019Publication date: August 6, 2020Inventors: Chin-Wei Lin, Fan Gui, Gihoon Choo
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Publication number: 20200226978Abstract: A display pixel is provided that is operable to support hybrid compensation scheme having both in-pixel threshold voltage canceling and external threshold voltage compensation. The display may include multiple p-type silicon transistors with at least one n-type semiconducting-oxide transistor and one storage capacitor. An on-bias stress phase may be performed prior to a threshold voltage sampling and data programming phase to mitigate hysteresis and improve first frame response. In low refresh rate displays, a first additional on-bias stress operation can be performed separate from the threshold voltage sampling and data programming phase during a refresh frame and a second additional on-bias stress operation can be performed during a vertical blanking frame. The display pixel may be configured to receive an initialization voltage and an anode reset voltage, either of which can be dynamically tuned to match the stress of the first and second additional on-bias stress operations to minimize flicker.Type: ApplicationFiled: December 17, 2019Publication date: July 16, 2020Inventors: Chin-Wei Lin, Shinya Ono, Zino Lee, Yun Wang, Fan Gui