Patents by Inventor Lokesh Kumar KORAPATI
Lokesh Kumar KORAPATI 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: 10599276Abstract: The present disclosure is directed to a system and method to remove common mode noise projected onto a touch sensor array from a display. The system is configured to activate two rows of electrodes at the same time, while coupling remaining rows of electrodes to ground. A first one of the two activated rows is used for detection of a touch and a second one of the two activated rows is used to detect common mode noise from the display. The common mode noise detected by the second row is removed from signals received from a plurality of columns of the touch sensor array.Type: GrantFiled: October 17, 2018Date of Patent: March 24, 2020Assignee: STMICROELECTRONICS ASIA PACIFIC PTE LTDInventors: Praveesh Chandran, Lokesh Kumar Korapati, Mythreyi Nagarajan
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Patent number: 10365764Abstract: A method of foreign matter rejection for multi-touch capacitive touch screens includes performing touch detection in both self-capacitance mode and mutual capacitance mode. By combining information from both modes, a distinction is identified between wanted touches, such as by a finger or stylus, and unwanted touches such as by foreign matter.Type: GrantFiled: July 11, 2016Date of Patent: July 30, 2019Assignee: STMicroelectronics Asia Pacific Pte LtdInventors: Lokesh Kumar Korapati, Manivannan Ponnarasu, Mythreyi Nagarajan
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Patent number: 10209831Abstract: A method of compensated touch data values disclosed herein includes acquiring touch data values about a dead sensing zone of a touch screen, and determining a peak value of those touch data values. Then, a new peak value is calculated as a function of an average of the peak value and another value of the touch data value, and a sharpness value for the dead sensing zone is generated if a second highest value of the touch data values is less than the new peak value. Thereafter, compensated touch data values are generated for the dead sensing zone if the second highest value is greater than the new peak value.Type: GrantFiled: December 19, 2017Date of Patent: February 19, 2019Assignee: STMicroelectronics Asia Pacific Pte LtdInventors: Rooney Kim, Lokesh Kumar Korapati
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Publication number: 20190050087Abstract: The present disclosure is directed to a system and method to remove common mode noise projected onto a touch sensor array from a display. The system is configured to activate two rows of electrodes at the same time, while coupling remaining rows of electrodes to ground. A first one of the two activated rows is used for detection of a touch and a second one of the two activated rows is used to detect common mode noise from the display. The common mode noise detected by the second row is removed from signals received from a plurality of columns of the touch sensor array.Type: ApplicationFiled: October 17, 2018Publication date: February 14, 2019Inventors: Praveesh CHANDRAN, Lokesh Kumar KORAPATI, Mythreyi NAGARAJAN
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Patent number: 10120509Abstract: The present disclosure is directed to a system and method to remove common mode noise projected onto a touch sensor array from a display. The system is configured to activate two rows of electrodes at the same time, while coupling remaining rows of electrodes to ground. A first one of the two activated rows is used for detection of a touch and a second one of the two activated rows is used to detect common mode noise from the display. The common mode noise detected by the second row is removed from signals received from a plurality of columns of the touch sensor array.Type: GrantFiled: December 29, 2015Date of Patent: November 6, 2018Assignee: STMICROELECTRONICS ASIA PACIFIC PTE LTDInventors: Praveesh Chandran, Lokesh Kumar Korapati, Mythreyi Nagarajan
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Publication number: 20180107340Abstract: A method of compensated touch data values disclosed herein includes acquiring touch data values about a dead sensing zone of a touch screen, and determining a peak value of those touch data values. Then, a new peak value is calculated as a function of an average of the peak value and another value of the touch data value, and a sharpness value for the dead sensing zone is generated if a second highest value of the touch data values is less than the new peak value. Thereafter, compensated touch data values are generated for the dead sensing zone if the second highest value is greater than the new peak value.Type: ApplicationFiled: December 19, 2017Publication date: April 19, 2018Applicant: STMicroelectronics Asia Pacific Pte LtdInventors: Rooney Kim, Lokesh Kumar Korapati
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Patent number: 9874974Abstract: A method of compensated touch data values disclosed herein includes acquiring touch data values about a dead sensing zone of a touch screen, and determining a peak value of those touch data values. Then, a new peak value is calculated as a function of an average of the peak value and another value of the touch data value, and a sharpness value for the dead sensing zone is generated if a second highest value of the touch data values is less than the new peak value. Thereafter, compensated touch data values are generated for the dead sensing zone if the second highest value is greater than the new peak value.Type: GrantFiled: April 8, 2016Date of Patent: January 23, 2018Assignee: STMicroelectronics Asia Pacific Pte LtdInventors: Rooney Kim, Lokesh Kumar Korapati
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Publication number: 20180011596Abstract: A method of foreign matter rejection for multi-touch capacitive touch screens includes performing touch detection in both self-capacitance mode and mutual capacitance mode. By combining information from both modes, a distinction is identified between wanted touches, such as by a finger or stylus, and unwanted touches such as by foreign matter.Type: ApplicationFiled: July 11, 2016Publication date: January 11, 2018Applicant: STMicroelectronics Asia Pacific Pte LtdInventors: Lokesh Kumar Korapati, Manivannan Ponnarasu, Mythreyi Nagarajan
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Patent number: 9817530Abstract: An electronic device may include a touchscreen having sensing capacitors, and readout circuitry. The readout circuitry may be configured to accumulate a sample set from each sensing capacitor, divide the sample set into sample subsets, remove a given sample subset when the given sample subset exceeds a threshold, and process remaining sample subsets for touch input.Type: GrantFiled: August 31, 2015Date of Patent: November 14, 2017Assignee: STMICROELECTRONICS ASIA PACIFIC PTE. LTD.Inventors: Kusuma Adi Ningrat, Lokesh Kumar Korapati, Jerry Kim
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Publication number: 20170293394Abstract: A method of compensated touch data values disclosed herein includes acquiring touch data values about a dead sensing zone of a touch screen, and determining a peak value of those touch data values. Then, a new peak value is calculated as a function of an average of the peak value and another value of the touch data value, and a sharpness value for the dead sensing zone is generated if a second highest value of the touch data values is less than the new peak value. Thereafter, compensated touch data values are generated for the dead sensing zone if the second highest value is greater than the new peak value.Type: ApplicationFiled: April 8, 2016Publication date: October 12, 2017Applicant: STMicroelectronics Asia Pacific Pte LtdInventors: Rooney Kim, Lokesh Kumar Korapati
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Publication number: 20170185182Abstract: The present disclosure is directed to a system and method to remove common mode noise projected onto a touch sensor array from a display. The system is configured to activate two rows of electrodes at the same time, while coupling remaining rows of electrodes to ground. A first one of the two activated rows is used for detection of a touch and a second one of the two activated rows is used to detect common mode noise from the display. The common mode noise detected by the second row is removed from signals received from a plurality of columns of the touch sensor array.Type: ApplicationFiled: December 29, 2015Publication date: June 29, 2017Inventors: Praveesh CHANDRAN, Lokesh Kumar KORAPATI, Mythreyi NAGARAJAN
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Patent number: 9675368Abstract: A touch panel includes a plurality of drive lines, a plurality of orthogonal sense lines, and a plurality of sensors. A method of controlling the touch panel to detect touches includes simultaneously applying a drive signal to each of a group of drive lines of the touch panel. Each of the drive signals is applied to a corresponding drive line in the group during a time slot and all the applied drive signals having the same electrical characteristics over the time slot. The method includes sensing sense signals generated on the sense lines in response to the applied drive signals and processing the sense signals to detect touches of the touch panel.Type: GrantFiled: May 7, 2014Date of Patent: June 13, 2017Assignee: STMicroelectronics Asia Pacific Pte Ltd.Inventors: Dianbo Guo, Praveesh Chandran, Lokesh Kumar Korapati
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Publication number: 20170060293Abstract: An electronic device may include a touchscreen having sensing capacitors, and readout circuitry. The readout circuitry may be configured to accumulate a sample set from each sensing capacitor, divide the sample set into sample subsets, remove a given sample subset when the given sample subset exceeds a threshold, and process remaining sample subsets for touch input.Type: ApplicationFiled: August 31, 2015Publication date: March 2, 2017Inventors: Kusuma Adi NINGRAT, Lokesh Kumar KORAPATI, Jerry KIM
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Patent number: 9524697Abstract: A video display includes a video display panel and a video display drive circuit configured to control a display on condition. A touch screen includes a touch screen panel (mounted on top of the video display panel) and a touch panel control and sense circuit configured to operate the touch screen panel in a self-capacitance mode. The touch panel control and sense circuit includes sense drive circuits configured to generate sense drive signals for application to sense lines of the touch screen panel. A controller controls actuation of the sense drive circuits so that the sense drive signals are synchronized to the display on condition. In an implementation, the leading edges of the sense drive signals are synchronized to the display on condition. In another implementation, a window is synchronized to the display on condition and the leading edges of the sense drive signals exhibit jitter within the window.Type: GrantFiled: September 2, 2014Date of Patent: December 20, 2016Assignee: STMicroelectronics Asia Pacific Pte LtdInventors: Kusuma Adi Ningrat, Giuseppe Noviello, Jenn Woei Soo, Lokesh Kumar Korapati
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Publication number: 20160062546Abstract: A video display includes a video display panel and a video display drive circuit configured to control a display on condition. A touch screen includes a touch screen panel (mounted on top of the video display panel) and a touch panel control and sense circuit configured to operate the touch screen panel in a self-capacitance mode. The touch panel control and sense circuit includes sense drive circuits configured to generate sense drive signals for application to sense lines of the touch screen panel. A controller controls actuation of the sense drive circuits so that the sense drive signals are synchronized to the display on condition. In an implementation, the leading edges of the sense drive signals are synchronized to the display on condition. In another implementation, a window is synchronized to the display on condition and the leading edges of the sense drive signals exhibit jitter within the window.Type: ApplicationFiled: September 2, 2014Publication date: March 3, 2016Applicant: STMicroelectronics Asia Pacific Pte LtdInventors: Kusuma Adi Ningrat, Giuseppe Noviello, Jenn Woei Soo, Lokesh Kumar Korapati
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Publication number: 20150324023Abstract: A touch panel includes a plurality of drive lines, a plurality of orthogonal sense lines, and a plurality of sensors. A method of controlling the touch panel to detect touches includes simultaneously applying a drive signal to each of a group of drive lines of the touch panel. Each of the drive signals is applied to a corresponding drive line in the group during a time slot and all the applied drive signals having the same electrical characteristics over the time slot. The method includes sensing sense signals generated on the sense lines in response to the applied drive signals and processing the sense signals to detect touches of the touch panel.Type: ApplicationFiled: May 7, 2014Publication date: November 12, 2015Inventors: Dianbo GUO, Praveesh CHANDRAN, Lokesh Kumar KORAPATI