Patents by Inventor Shiping Shen
Shiping Shen 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: 20200365082Abstract: A current-voltage (IV) relationship of a pixel having a diode is initially determined. A first voltage is determined that does not cause the diode to emit light, and a first current across the diode is sensed by applying the first voltage. A predetermined current is determined based on the first voltage and the IV relationship. A ratio is determined based on the first current, a target current, and the predetermined current. A ratio voltage is determined by applying the ratio to a predetermined target voltage. If the first current is less than the predetermined current, then the ratio voltage is applied to supply a target current to the diode. If the first current is greater than the predetermined current, then a second voltage is determined by averaging the first test voltage and the ratio voltage, and the second voltage is applied to supply the target current to the diode.Type: ApplicationFiled: April 15, 2020Publication date: November 19, 2020Inventors: Injae Hwang, Jesun Kim, Hyunwoo Nho, Jie Won Ryu, Hyunsoo Kim, Junhua Tan, Myungjoon Choi, Rebecca Park, Shiping Shen, Sun-Il Chang, Shengkui Gao, Kingsuk Brahma, Jesse Aaron Richmond, Changki Min, Yifan Zhang, Jiye Lee, Chaohao Wang
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Publication number: 20200335046Abstract: Techniques for implementing and/or operating an electronic device, which includes a display pixel that emits light to facilitate displaying an image during an emission period and a data driver coupled to the display pixel via a data line. The data driver generates a data line voltage signal based on image data that indicates target luminance of the display pixel in the image and supplies the data line voltage signal to the data line during a non-emission period preceding the emission period to facilitate writing the image to the display pixel. Additionally, the data driver supplies an intermediate voltage greater than a ground voltage to the data line during the emission period in which the image is displayed to facilitate reducing luminance variation in the image resulting from a leakage current flowing between an internal node of the display pixel and the data line during the emission period.Type: ApplicationFiled: April 16, 2020Publication date: October 22, 2020Inventors: Jie Won Ryu, Myungjoon Choi, Hyunsoo Kim, Hyunwoo Nho, Chin-Wei Lin, Shiping Shen, Kingsuk Brahma, Chaohao Wang, Shinya Ono, Alex H. Pai, Hassan Edrees
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Publication number: 20200335040Abstract: An electronic device includes a display having multiple regions of pixels. Each pixel includes a diode that emits light based on an amount of current through the diode and a transistor that controls the amount of current flowing through the diode. The electronic device includes driver-integrated circuitry that reduces hysteresis in a first transistor of a first pixel of a region of pixels, settles a threshold voltage of the first transistor, applies a test voltage to the first transistor, and senses a current across the first transistor. The electronic device includes processing circuitry that determines a predetermined voltage based on the current and a predetermined current-voltage relationship determined at an initial temperature, determines a voltage difference between the test voltage and the predetermined voltage, and applies the predetermined voltage and the voltage difference to a second transistor of a second pixel of the region of pixels.Type: ApplicationFiled: February 26, 2020Publication date: October 22, 2020Inventors: Hyunwoo Nho, Myungjoon Choi, Hyunsoo Kim, Mohammad Ali Jangda, Jie Won Ryu, Shiping Shen, Kingsuk Brahma, Chaohao Wang, Wei H. Yao, Alex H. Pai
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Patent number: 10755618Abstract: Systems and methods are provided for differential sensing (DS), difference-differential sensing (DDS), correlated double sampling (CDS), correlated-correlated double sampling (CDS-CDS) and/or programmable capacitor matching to reduce display panel sensing noise. An electronic device may include one or more processors that generate image data according to sensing operations. The one or more processors may reference a sensing pattern as part of sensing operations. Applying test sensing signals based on the sensing pattern may help reduce error associated with sensing operations.Type: GrantFiled: April 19, 2019Date of Patent: August 25, 2020Assignee: Apple Inc.Inventors: Hung Sheng Lin, Shengkui Gao, Hyunwoo Nho, Chin-Wei Lin, Mohammad B. Vahid Far, Jie Won Ryu, Kingsuk Brahma, Junhua Tan, Sun-Il Chang, Shinya Ono, Jesse Aaron Richmond, Yafei Bi, Derek K. Shaeffer, Myungjoon Choi, Shiping Shen
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Patent number: 10642083Abstract: Electronic devices and methods for compensating for temperature-dependent fluctuations in a display include receiving a temperature index may be received from a sensor and/or calculations that indicates a temperature of the system, a pixel, a panel, a grid of a panel, or a combination thereof. The temperature is used to predict a voltage change across an emissive element (VHILO), such as an organic light emitting diode (OLED). This predicted voltage change is then compensated for before emission.Type: GrantFiled: June 14, 2018Date of Patent: May 5, 2020Assignee: Apple Inc.Inventors: Injae Hwang, Rui Zhang, Hung Sheng Lin, Hyunsoo Kim, Hyunwoo Nho, Jesse A. Richmond, Jie Won Ryu, Junhua Tan, Kingsuk Brahma, Shengkui Gao, Shiping Shen, Sun-Il Chang
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Publication number: 20200118486Abstract: An electronic device comprises an electronic display having an active area having a pixel. The electronic device also comprises processing circuitry configured to receive image data to send to the pixel and adjust the image data to generate corrected image data based at least in part on a stored correction value for the pixel. The processing circuitry also is configured to generate a test data to send to the pixel subsequent to sending corrected image data to the pixel, wherein the test data is selected based upon a comparison of at least one aspect of the corrected image data with a threshold value.Type: ApplicationFiled: March 27, 2018Publication date: April 16, 2020Inventors: Hung Sheng Lin, Hyunwoo Nho, Sun-Il Chang, Junhua Tan, Jie Won Ryu, Shengkui Gao, Rui Zhang, Injae Hwang, Kingsuk Brahma, Jesse Aaron Richmond, Shiping Shen, Hyunsoo Kim
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Patent number: 10573234Abstract: A method for operating an electronic display includes displaying image frames and receiving operational parameters of the electronic display based on illuminating a sense pixel of at least one row of pixels of the electronic display when displaying the image frames. A first set of pixels below the at least one row of pixels renders a portion of a first image frame and a second set of pixels above the at least one row of pixels renders a portion of a second image frame. The method also includes adjusting image display of a third image frame on the electronic display based on the operational parameters.Type: GrantFiled: July 30, 2018Date of Patent: February 25, 2020Assignee: Apple Inc.Inventors: Hung Sheng Lin, Hyunwoo Nho, Chaohao Wang, Jie Won Ryu, Kingsuk Brahma, Shiping Shen, Shengkui Gao, Hyunsoo Kim, Sun-Il Chang, Junhua Tan, Injae Hwang, Myungjoon Choi
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Patent number: 10564774Abstract: Methods for mitigation of sensing error effects in display panels are disclosed. Display panels, such as pixel-based panels, may have circuitry to sense the luminance values, compare measurements with target luminance values, and provide corrections. Sensing errors, such as ones caused by sensor hysteresis and thermal fluctuations, may lead to overcorrections and visible artifacts. Mitigations schemes discussed herein include filtering of sensed signal with low pass filters, partial correction strategies, and feedforward sensing schemes. Circuitry that implements these schemes are also discussed.Type: GrantFiled: June 14, 2018Date of Patent: February 18, 2020Assignee: Apple Inc.Inventors: Sun-Il Chang, Myung-Je Cho, Kingsuk Brahma, Jesse A. Richmond, Hyunsoo Kim, Shiping Shen, Injae Hwang, Rui Zhang, Shengkui Gao, Hung Sheng Lin, Jie Won Ryu, Junhua Tan, Hyunwoo Nho
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Patent number: 10565923Abstract: Electronic devices and methods for compensating for noise in a display that includes sensing a current in a sensing channel of the display. Compensating for the noise also includes sensing an observation current from noise in an observation channel of the display and scaling the observation current to generate a scaled observation current. The scaled observation current is subtracted from the sense current to generate a compensated output. The compensated output is used to drive compensation operations of the display based at least in part on the compensated output to reduce effects of the noise.Type: GrantFiled: September 11, 2017Date of Patent: February 18, 2020Assignee: Apple Inc.Inventors: Shiping Shen, Derek K. Shaeffer, Baris Cagdaser, Hyunwoo Nho, Kingsuk Brahma, Hung Sheng Lin, Injae Hwang, Jie Won Ryu, Hyunsoo Kim, Junhua Tan, Rui Zhang, Shengkui Gao, Mohammad B Vahid Far, Jesse A. Richmond, Sun-Il Chang
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Publication number: 20200005716Abstract: The present disclosure relates generally to systems and methods that may reduce a reduction in visual artifacts related to hysteresis of a light emitting diode (LED) electronic display. In one example, an electronic device may include a controller. The controller is may provide a signal to a pixel of a display of the electronic device while at least a portion of the display is turned off. The signal may include a first current and a second current. The first current may be designed to increase an ambient temperature corresponding to the pixel. The second current may be generated as part of an active panel conditioning operation. By applying the first current and the second current, hysteresis settling times from the pixel may improve, therefore improving speeds of sensing and compensation operations of the electronic device.Type: ApplicationFiled: September 11, 2019Publication date: January 2, 2020Inventors: Junhua Tan, Kingsuk Brahma, Jie Won Ryu, Shengkui Gao, Shiping Shen, Majid Gharghi, Hyunwoo Nho, Injae Hwang, Kavinaath Murugan, Sun-Il Chang, Chin Wei Lin, Hyunsoo Kim, Rui Zhang, Jesse Aaron Richmond, Yun Wang, Hung Sheng Lin, Alex H. Pai, Chaohao Wang, Wei H. Yao
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Publication number: 20190244555Abstract: Systems and methods are provided for differential sensing (DS), difference-differential sensing (DDS), correlated double sampling (CDS), correlated-correlated double sampling (CDS-CDS) and/or programmable capacitor matching to reduce display panel sensing noise. An electronic device may include one or more processors that generate image data according to sensing operations. The one or more processors may reference a sensing pattern as part of sensing operations. Applying test sensing signals based on the sensing pattern may help reduce error associated with sensing operations.Type: ApplicationFiled: April 19, 2019Publication date: August 8, 2019Inventors: Hung Sheng Lin, Shengkui Gao, Hyunwoo Nho, Chin-Wei Lin, Mohammad B. Vahid Far, Jie Won Ryu, Kingsuk Brahma, Junhua Tan, Sun-II Chang, Shinya Ono, Jesse Aaron Richmond, Yafei Bi, Derek K. Shaeffer, Myungjoon Choi, Shiping Shen
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Publication number: 20180342193Abstract: Electronic devices and methods for compensating for noise in a display that includes sensing a current in a sensing channel of the display. Compensating for the noise also includes sensing an observation current from noise in an observation channel of the display and scaling the observation current to generate a scaled observation current. The scaled observation current is subtracted from the sense current to generate a compensated output. The compensated output is used to drive compensation operations of the display based at least in part on the compensated output to reduce effects of the noise.Type: ApplicationFiled: September 11, 2017Publication date: November 29, 2018Inventors: Shiping Shen, Derek K. Shaeffer, Baris Cagdaser, Hyunwoo Nho, Kingsuk Brahma, Hung Sheng Lin, Injae Hwang, Jie Won Ryu, Hyunsoo Kim, Junhua Tan, Rui Zhang, Shengkui Gao, Mohammad B. Vahid Far, Jesse A. Richmond, Sun-Il Chang
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Publication number: 20180336823Abstract: A method for operating an electronic display includes displaying image frames and receiving operational parameters of the electronic display based on illuminating a sense pixel of at least one row of pixels of the electronic display when displaying the image frames. A first set of pixels below the at least one row of pixels renders a portion of a first image frame and a second set of pixels above the at least one row of pixels renders a portion of a second image frame. The method also includes adjusting image display of a third image frame on the electronic display based on the operational parameters.Type: ApplicationFiled: July 30, 2018Publication date: November 22, 2018Inventors: Hung Sheng Lin, Hyunwoo Nho, Chaohao Wang, Jie Won Ryu, Kingsuk Brahma, Shiping Shen, Shengkui Gao, Hyunsoo Kim, Sun-Il Chang, Junhua Tan, Injae Hwang, Myungjoon Choi
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Publication number: 20180075798Abstract: A mobile electronic device includes a display having a pixel and processing circuitry separate from but communicatively coupled to the display. The processing circuitry prepares image data to send to the pixel and adjusts the image data to compensate for operational variations of the display based on feedback received from the display that describes a present operational behavior of the pixel. The mobile electronic device also includes additional electronic components that affect the present operational behavior of the pixel depending on present operational behavior of the additional electronic components.Type: ApplicationFiled: July 27, 2017Publication date: March 15, 2018Inventors: Hyunwoo Nho, Hung Sheng Lin, Jie Won Ryu, Junhua Tan, Sun-Il Chang, Shengkui Gao, Rui Zhang, Injae Hwang, Kingsuk Brahma, Jesse Aaron Richmond, Shiping Shen, Hyunsoo Kim, Sebastian Knitter, Lu Zhang, Nicolas P. Bonnier, Chih-Wei Yeh, Chaohao Wang, Paolo Sacchetto, Chin-Wei Lin, Mohammad B Vahid Far, Shinya Ono, Yafei Bi, Majid Gharghi, Kavinaath Murugan, Yun Wang, Derek K. Shaeffer, Baris Cagdaser, Tobias Jung, Marc Albrecht, Myung-Je Cho