Patents by Inventor Weijun Yao
Weijun Yao 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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Publication number: 20240105089Abstract: Electronic displays and electronic devices including such electronic displays and antennas are provided for improved transmission of signals through circuitry of the electronic display. The electronic display may include multiple power supply tiles that are separated with non-conductive gaps to reduce circulation of eddy currents induced by the transmission signals. Moreover, voltage supply routing paths within the power supply tiles may be grouped to provide non-conductive gaps within the power supply tiles. Accordingly, the antenna may provide the transmission signals through the electronic display with improved efficiency based on reducing surface currents (e.g., eddy currents) on the electronic display.Type: ApplicationFiled: September 19, 2023Publication date: March 28, 2024Inventors: William Matthew Pender Paul, Mario Martinis, Jiayi Jin, Yongjie Jiang, Baris Posat, Mojtaba Fallahpour, Haitao Li, James G. Horiuchi, Giovanni Azzellino, Weijun Yao, Stanley B. Wang, Mahdi Farrokh Baroughi
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Publication number: 20240092584Abstract: A conveying device (100) and an inspection system (1000) are provided. The conveying device includes: a first support frame (1); a first conveying mechanism (2) and a second conveying mechanism (3) which are installed on the first support frame; and a switching mechanism (4) configured to selectively lift the first conveying mechanism or the second conveying mechanism in a vertical direction, such that the first conveying mechanism or the second conveying mechanism carries goods (401) and conveys the goods in a first horizontal direction or a second horizontal direction different from the first horizontal direction. The conveying device may achieve a positioning and a smooth continuous conveying of goods, and achieve a smooth conveying and a calibrated positioning of the goods in different postures.Type: ApplicationFiled: November 22, 2021Publication date: March 21, 2024Inventors: Li ZHANG, Zhiqiang CHEN, Yuanjing LI, Qingping HUANG, Weijun GUO, Liming YAO, Hui DING, Junhao LIU, Jiajia ZHOU
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Publication number: 20240012515Abstract: Touch sensitive display technologies (e.g., integrated touch-display pixel-based systems) are evolving to contain more analog and digital circuits inside the panel itself instead of the traditionally simple thin-film transistors. This improves the display characteristics but makes those circuits more vulnerable to the impact of external ESD strikes, which can degrade the user experience. This disclosure describes a series of circuits and techniques to mitigate the impact of these discharges on front of screen artifacts and potential false touches. These circuits and techniques may include: performing configuration-only panel updates independently of the image refresh rate, improving the in-panel memory circuits to make them resistant to unexpected pin toggles via disabling of a write path in response to a read clock, implementing a pin corruption detector and implementing a supply injection detector.Type: ApplicationFiled: June 20, 2023Publication date: January 11, 2024Inventors: Pablo Moreno Galbis, Xiang Lu, Bin Huang, Ling Zhang, Nikhil Acharya, Derek K. Shaeffer, Stanley B. Wang, Yongjie Jiang, Hopil Bae, Jiayi Jin, Ce Zhang, Young Don Bae, Giovanni Azzellino, Wooseung Yang, Mahdi Farrokh Baroughi, Weijun Yao, Rajesh Velayuthan, Eric A. Hildebrandt, Henry C. Jen
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Patent number: 11823644Abstract: A system may include an electronic display panel having pixels, where each pixel emits light based on a respective programming signal applied to the pixel. The system may also include processing circuitry to determine a respective control signal upon which the respective programing signal for each pixel is based. The processing circuitry may determine each respective control signal based at least in part on approximations of respective pixel brightness-to-data relationship as defined by a function having variables stored in memory accessible to the processing circuitry.Type: GrantFiled: September 21, 2022Date of Patent: November 21, 2023Assignee: Apple Inc.Inventors: Maofeng Yang, Shengkui Gao, Paolo Sacchetto, Weijun Yao, Yongjun Li, Jiayi Jin
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Patent number: 11688363Abstract: An electronic device may include an electronic display including display pixels to display an image based on compensated image data. The electronic display may also include a stressed reference pixel to exhibit burn-in related aging in response to one or more stress sessions and a non-stressed reference pixel configured to not undergo the one or more stress sessions. Additionally, the electronic device may include image processing circuitry to determine a panel-specific aging profile based on a comparison between one or more properties of the stressed reference pixel and the one or more properties of the non-stressed reference pixel. The image processing circuitry may also generate one or more gain maps based on the panel-specific aging profile and generate the compensated image data by applying the one or more gain maps to input image data.Type: GrantFiled: July 14, 2021Date of Patent: June 27, 2023Assignee: Apple Inc.Inventors: Maofeng Yang, Jiayi Jin, David A. Doyle, Yifan Zhang, Weijun Yao, Jiye Lee, Tae-Wook Koh, Mathew K. Mathai, Chuang Qian, Tsung-Ting Tsai, James P. Landry, Kiran S. Pillai, Injae Hwang, Yongjun Li
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Publication number: 20230197020Abstract: This disclosure provide various techniques for tracking emission profiles on an electronic display. An emission profile may be applied to the electronic display in order to illuminate certain pixels and deactivate (e.g., turn off) certain pixels in the electronic display to facilitate refreshing (e.g., programming with new image data) the deactivated pixels. A real-time row-based average pixel level or average pixel luminance calculation architecture may track the one or more EM profiles to accurately model EM profile behavior, which may enable accurate calculation of the average pixel level or average pixel luminance of the electronic display at any one point in time. The accurate average pixel level or average pixel luminance calculations effectuated by the EM profile tracking may be used to reduce the IR drop, improve real-time peak-luminance control, and improve the performance of under-display sensors, among other advantages.Type: ApplicationFiled: November 16, 2022Publication date: June 22, 2023Inventors: Shengkui Gao, Jie Won Ryu, Kingsuk Brahma, Marc J DeVincentis, Mohammad Ali Jangda, Paolo Sacchetto, Weijun Yao, Yafei Bi, Yang Xu, Yue Jack Chu, Zhe Hua
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Patent number: 11625124Abstract: A touch controller is disclosed. The touch controller can include sense circuitry configured to sense, during a self-capacitance portion of a touch frame, first one or more self-capacitances associated with a first plurality of touch pixels on a touch sensor panel, and sense, during a mutual capacitance portion of the touch frame, first one or more mutual capacitances associated with the first plurality of touch pixels. A touch processor can be configured to, based on the first one or more self-capacitances and the first one or more mutual capacitances, sense a single touch event associated with the touch frame.Type: GrantFiled: July 6, 2020Date of Patent: April 11, 2023Assignee: Apple Inc.Inventors: Yingxuan Li, Marduke Yousefpor, Weijun Yao
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Patent number: 11561647Abstract: A touch sensor panel is disclosed. In some examples, the touch sensor panel comprises a plurality of touch node electrodes. In some examples, the touch sensor panel comprises a touch controller configured to drive and sense the plurality of touch node electrodes in a fully bootstrapped configuration to obtain a fully bootstrapped touch image, drive and sense the plurality of touch node electrodes in a second configuration, different from the fully bootstrapped configuration, to obtain a second touch image, the second touch image including an effect of water on the touch sensor panel, and determine a final touch image based on the fully bootstrapped touch image and the second touch image, the final touch image not including the effect of the water on the touch sensor panel. In some examples, the second configuration comprises a mutual capacitance configuration. In some examples, the second configuration comprises a partially bootstrapped configuration.Type: GrantFiled: July 8, 2020Date of Patent: January 24, 2023Assignee: Apple Inc.Inventors: Yingxuan Li, Weijun Yao, Vivek Pant, Martin Paul Grunthaner, Marduke Yousefpor, Sumant Ranganathan
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Publication number: 20230014478Abstract: A system may include an electronic display panel having pixels, where each pixel emits light based on a respective programming signal applied to the pixel. The system may also include processing circuitry to determine a respective control signal upon which the respective programing signal for each pixel is based. The processing circuitry may determine each respective control signal based at least in part on approximations of respective pixel brightness-to-data relationship as defined by a function having variables stored in memory accessible to the processing circuitry.Type: ApplicationFiled: September 21, 2022Publication date: January 19, 2023Inventors: Maofeng Yang, Shengkui Gao, Paolo Sacchetto, Weijun Yao, Yongjung Li, Jiayi Jin
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Patent number: 11545110Abstract: A system may include an electronic display panel having pixels, where each pixel emits light based on a respective programming signal applied to the pixel. The system may also include processing circuitry to determine a respective control signal upon which the respective programing signal for each pixel is based. The processing circuitry may determine each respective control signal based at least in part on approximations of respective pixel brightness-to-data relationship as defined by a function having variables stored in memory accessible to the processing circuitry.Type: GrantFiled: November 16, 2021Date of Patent: January 3, 2023Assignee: Apple Inc.Inventors: Maofeng Yang, Shengkui Gao, Paolo Sacchetto, Weijun Yao, Yongjun Li, Jiayi Jin
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Patent number: 11416086Abstract: Electrode configurations for reducing wobble error for a stylus translating on a surface over and between electrodes of a touch sensor panel are disclosed. In some examples, electrodes associated with a more linear signal profile are correlated with lower wobble error. In some examples, electrodes can have projections which can interleave with projections of adjacent electrodes. In some configurations, projections of adjacent electrodes can be interleaved in one-dimension; in other configurations, projections of adjacent electrodes can be interleaved in two-dimensions. In some configurations, the width and length of one or more projections in an electrode can be selected based on a desired signal profile for that electrode.Type: GrantFiled: September 24, 2019Date of Patent: August 16, 2022Assignee: Apple Inc.Inventors: Kanke Gao, Wei Hsin Yao, Yingxuan Li, Weijun Yao
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Patent number: 11417250Abstract: A method of adjusting a test gray voltages applied to a component of an electronic display during a test frame between image frames, wherein the adjustment is based at least in part on the control signal to the component during a prior image frame. The method may reduce hysteresis effects on the extraction of sensed currents of the component during the test frame, which may increase the accuracy and/or consistency of determined parameters evaluated from the sensed currents. The determined parameters may include temperature and/or aging of the component. The determined parameters may be used to adjust control signals for the component and other components in a region near the component during the next image frame.Type: GrantFiled: September 28, 2018Date of Patent: August 16, 2022Assignee: Apple Inc.Inventors: Yongjun Li, Jiayi Jin, Maofeng Yang, Jun Li, Weijun Yao, Derek K. Shaeffer, Baris Cagdaser
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Publication number: 20220093059Abstract: An electronic device may include an electronic display including display pixels to display an image based on compensated image data. The electronic display may also include a stressed reference pixel to exhibit burn-in related aging in response to one or more stress sessions and a non-stressed reference pixel configured to not undergo the one or more stress sessions. Additionally, the electronic device may include image processing circuitry to determine a panel-specific aging profile based on a comparison between one or more properties of the stressed reference pixel and the one or more properties of the non-stressed reference pixel. The image processing circuitry may also generate one or more gain maps based on the panel-specific aging profile and generate the compensated image data by applying the one or more gain maps to input image data.Type: ApplicationFiled: July 14, 2021Publication date: March 24, 2022Inventors: Maofeng Yang, Jiayi Jin, David A. Doyle, Yifan Zhang, Weijun Yao, Jiye Lee, Tae-Wook Koh, Mathew K. Mathai, Chuang Qian, Tsung-Ting Tsai, James P. Landry, Kiran S. Pillai, Injae Hwang, Yongjun Li
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Publication number: 20220076629Abstract: A system may include an electronic display panel having pixels, where each pixel emits light based on a respective programming signal applied to the pixel. The system may also include processing circuitry to determine a respective control signal upon which the respective programing signal for each pixel is based. The processing circuitry may determine each respective control signal based at least in part on approximations of respective pixel brightness-to-data relationship as defined by a function having variables stored in memory accessible to the processing circuitry.Type: ApplicationFiled: November 16, 2021Publication date: March 10, 2022Inventors: Maofeng Yang, Shengkui Gao, Paolo Sacchetto, Weijun Yao, Yongjun Li, Jiayi Jin
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Patent number: 11271181Abstract: An electronic display having pixels and control circuitry to drive the pixels to display image data even during relatively long presentation times without visual artifacts, such as flicker, are provided. The control circuitry may cause the pixel to perform a threshold voltage sampling and pixel programming phase to store image data for the pixel while accounting for a first threshold voltage of the first transistor. Afterward, an on-bias stress phase may cause a threshold voltage of the first transistor of the plurality of transistors to reach a second threshold voltage. Following the on-bias stress phase, a first emission phase may cause the light-emitting diode to emit light in accordance with the image data, and subsequent on-bias stress phases and subsequent emission phases for the duration of the presentation time may take place without a visible flicker artifact.Type: GrantFiled: September 19, 2019Date of Patent: March 8, 2022Assignee: Apple Inc.Inventors: Maofeng Yang, Weijun Yao, Jiayi Jin, Paolo Sacchetto, Injae Hwang
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Patent number: 11205378Abstract: A system may include an electronic display panel having pixels, where each pixel emits light based on a respective programming signal applied to the pixel. The system may also include processing circuitry to determine a respective control signal upon which the respective programing signal for each pixel is based. The processing circuitry may determine each respective control signal based at least in part on approximations of respective pixel brightness-to-data relationship as defined by a function having variables stored in memory accessible to the processing circuitry.Type: GrantFiled: September 6, 2019Date of Patent: December 21, 2021Assignee: Apple Inc.Inventors: Maofeng Yang, Shengkui Gao, Paolo Sacchetto, Weijun Yao, Yongjun Li, Jiayi Jin
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Patent number: 11200867Abstract: A system may include an electronic display panel having pixels, where each pixel emits light based on a respective programming signal applied to the pixel. The system may also include processing circuitry to determine a respective control signal upon which the respective programing signal for each pixel is based. The processing circuitry may determine each respective control signal based at least in part on approximations of respective pixel brightness-to-data relationship as defined by a function having variables stored in memory accessible to the processing circuitry.Type: GrantFiled: September 6, 2019Date of Patent: December 14, 2021Assignee: Apple Inc.Inventors: Maofeng Yang, Shengkui Gao, Paolo Sacchetto, Weijun Yao, Yongjun Li, Jiayi Jin, Pyungwoo Yeon, Michael Hong Yeol Lim, Peter F. Holland, Ross Thompson
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Publication number: 20210304673Abstract: A system may include an electronic display panel having pixels, where each pixel may emit light based on a respective programming signal. The system may include a memory storing a map. The processing circuitry may determine a function for each pixel from the map. The processing circuitry may determine a respective control signal based on the function and a target brightness level for each pixel to generate multiple control signals, where the respective control signal is used to generate the respective programing signal for each pixel. The processing circuitry may determine a scaling factor based at least in part on the first map and may scale at least a subset of the multiple control signals based at least in part on the scaling factor.Type: ApplicationFiled: March 3, 2021Publication date: September 30, 2021Inventors: Shengkui Gao, Haifeng Li, Sinan Alousi, Marc Joseph DeVincentis, Yafei Bi, Hung Sheng Lin, Yi Qiao, Paolo Sacchetto, Weijun Yao, Pierre-Yves Emelie, Maofeng Yang, Yue Jack Chu
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Patent number: 11086444Abstract: A self-capacitive touch sensor panel configured to have a portion of both the touch and display functionality integrated into a common layer is provided. The touch sensor panel includes a layer with circuit elements that can switchably operate as both touch circuitry and display circuitry such that during a touch mode of the device the circuit elements operate as touch circuitry and during a display mode of the device the circuit elements operate as display circuitry. The touch mode and display mode can be time multiplexed. By integrating the touch hardware and display hardware into common layers, savings in power, weight and thickness of the device can be realized.Type: GrantFiled: November 15, 2018Date of Patent: August 10, 2021Assignee: Apple Inc.Inventors: Weijun Yao, Wei Hsin Yao, Yingxuan Li, Bingrui Yang, Marduke Yousefpor, Abbas Jamshidi-Roudbari, Ahmad Al-Dahle
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Patent number: 11081053Abstract: A display may have an array of organic light-emitting diode display pixels. Each display pixel may include a drive transistor coupled in series with one or more emission transistors and a respective organic light-emitting diode (OLED). A semiconducting-oxide transistor may be coupled between a drain terminal and a gate terminal of the drive transistor to help reduce leakage during low-refresh-rate display operations. To compensate for variations in the threshold voltage of the semiconducting-oxide transistor, the magnitude of a high voltage level of a scan control signal provided to the gate terminal of the semiconducting-oxide transistor may be adjusted. Sensing circuitry may be used to sense a display current while displaying a calibration image. The sensed display current may be compared to an expected display current associated with the calibration image. Processing circuitry may update the high voltage level based on the actual display current compared to the expected display current.Type: GrantFiled: February 22, 2019Date of Patent: August 3, 2021Assignee: Apple Inc.Inventors: Jiayi Jin, David A. Doyle, Kyung Hoae Koo, Maofeng Yang, Michael H. Lim, Paolo Sacchetto, Timothy M. Johnson, Venkatesh Rajendran, Weijun Yao, Yue Jack Chu