Patents by Inventor Prathit BUGNAIT
Prathit BUGNAIT 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: 20240134479Abstract: Touch sensor panel configurations for reducing wobble error for a stylus translating on a surface over and between electrodes of the touch sensor panel are disclosed. In some examples, electrodes with more linear signal profiles are correlated with lower wobble error. In some examples, diffusing elements formed of floating segments of conductive materials can diffuse signal from a stylus to a plurality of electrodes, thus, making the signal profiles associated with the electrodes more linear. In addition, diffusing elements can be configured to improve the optical uniformity of the touch sensor panel. In some examples, the diffusing elements can be formed on the same layer as floating dummy pixels and resemble a plurality of merged floating dummy pixels.Type: ApplicationFiled: December 19, 2023Publication date: April 25, 2024Inventors: Isaac CHAN, Prathit BUGNAIT, Albert LIN, Chun-Hao TUNG, Sunggu KANG, John Z. ZHONG
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Patent number: 11893183Abstract: Touch sensor panel configurations for reducing wobble error for a stylus translating on a surface over and between electrodes of the touch sensor panel are disclosed. In some examples, electrodes with more linear signal profiles are correlated with lower wobble error. In some examples, diffusing elements formed of floating segments of conductive materials can diffuse signal from a stylus to a plurality of electrodes, thus, making the signal profiles associated with the electrodes more linear. In addition, diffusing elements can be configured to improve the optical uniformity of the touch sensor panel. In some examples, the diffusing elements can be formed on the same layer as floating dummy pixels and resemble a plurality of merged floating dummy pixels.Type: GrantFiled: July 12, 2019Date of Patent: February 6, 2024Assignee: Apple Inc.Inventors: Isaac Chan, Prathit Bugnait, Albert Lin, Chun-Hao Tung, Sunggu Kang, John Z. Zhong
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Publication number: 20230359305Abstract: Differential driving and/or sensing can reduce noise in a touch screen. In some examples, the touch electrodes and/or routing traces can be implemented using metal mesh in first and second metal layers. To mitigate electrical interference at the touch screen from a display, a display-noise shield or sensor can be provided between the display and the touch screen. In some examples, a shield can minimize a noise contribution from the display to signals generated at the touch screen. In other examples, a sensor can enable a differential read out of signals at the touch screen that subtracts a noise component measured by the sensor. Forming the shield or sensor, and the touch screen over the display using an on-cell process can improve touch screen performance and yield. The shield can be connected to a conductive ring and flex circuit via tapping points in a stackup separate from a display stackup.Type: ApplicationFiled: May 5, 2023Publication date: November 9, 2023Inventors: Sagar R. VAZE, Yu-Heng CHENG, Prathit BUGNAIT, Isaac W. CHAN
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Publication number: 20190339813Abstract: Touch sensor panel configurations for reducing wobble error for a stylus translating on a surface over and between electrodes of the touch sensor panel are disclosed. In some examples, electrodes with more linear signal profiles are correlated with lower wobble error. In some examples, diffusing elements formed of floating segments of conductive materials can diffuse signal from a stylus to a plurality of electrodes, thus, making the signal profiles associated with the electrodes more linear. In addition, diffusing elements can be configured to improve the optical uniformity of the touch sensor panel. In some examples, the diffusing elements can be formed on the same layer as floating dummy pixels and resemble a plurality of merged floating dummy pixels.Type: ApplicationFiled: July 12, 2019Publication date: November 7, 2019Inventors: Isaac CHAN, Prathit BUGNAIT, Albert LIN, Chun-Hao TUNG, Sunggu KANG, John Z. ZHONG
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Patent number: 10353516Abstract: Touch sensor panel configurations for reducing wobble error for a stylus translating on a surface over and between electrodes of the touch sensor panel are disclosed. In some examples, electrodes with more linear signal profiles are correlated with lower wobble error. In some examples, diffusing elements formed of floating segments of conductive materials can diffuse signal from a stylus to a plurality of electrodes, thus, making the signal profiles associated with the electrodes more linear. In addition, diffusing elements can be configured to improve the optical uniformity of the touch sensor panel. In some examples, the diffusing elements can be formed on the same layer as floating dummy pixels and resemble a plurality of merged floating dummy pixels.Type: GrantFiled: September 30, 2015Date of Patent: July 16, 2019Assignee: Apple Inc.Inventors: Isaac Chan, Prathit Bugnait, Albert Lin, Chun-Hao Tung, Sunggu Kang, John Z. Zhong
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Patent number: 10310667Abstract: Electrode configurations for reducing wobble error for a stylus translating on a surface of a touch sensor panel is disclosed. Electrodes associated with a more linear signal profile can correlate to lower wobble error. In some examples, electrodes can be configured such that the signal profile associated with each electrode is spread to be wider, and thus, more linear. In some configurations, electrodes can include two or more bars extending along the length of the electrode with each bar electrically connected to one another at one or both ends. Bars can be of non-uniform width or spacing. Some configurations can include a “split bar,” which can divide a bar lengthwise in order to improve optical uniformity. In some examples, electrodes can include projections which can interleave with corresponding projections in adjacent electrodes.Type: GrantFiled: September 21, 2015Date of Patent: June 4, 2019Assignee: Apple Inc.Inventors: Alexandre Gourevitch, Albert Lin, Isaac Chan, Martin Paul Grunthaner, Prathit Bugnait, Seyed Mohammad Navidpour, Sumant Ranganathan
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Patent number: 9921696Abstract: Electrode configurations for reducing wobble error for a stylus translating on a surface over and between electrodes of a touch sensor panel is disclosed. In some examples, electrodes associated with a more linear signal profile are correlated with lower wobble error. In some examples, electrodes are coupled to adjacent electrodes via diffusing resistors such that the signal profile for each electrode is spread to be more linear. In some configurations, the value of the diffusing resistors and series resistance associated with an electrode is selected based on a desired signal profile for that electrode. In some examples, the series resistance can include a trace resistance and a compensating resistance. The compensating resistance can compensate for a variance in trace resistance between electrodes, thus making series resistance substantially equal for each of the electrodes.Type: GrantFiled: September 26, 2015Date of Patent: March 20, 2018Assignee: Apple Inc.Inventors: Steven P. Hotelling, Vivek Pant, Prathit Bugnait, Isaac Chan
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Publication number: 20170083152Abstract: Electrode configurations for reducing wobble error for a stylus translating on a surface of a touch sensor panel is disclosed. Electrodes associated with a more linear signal profile can correlate to lower wobble error. In some examples, electrodes can be configured such that the signal profile associated with each electrode is spread to be wider, and thus, more linear. In some configurations, electrodes can include two or more bars extending along the length of the electrode with each bar electrically connected to one another at one or both ends. Bars can be of non-uniform width or spacing. Some configurations can include a “split bar,” which can divide a bar lengthwise in order to improve optical uniformity. In some examples, electrodes can include projections which can interleave with corresponding projections in adjacent electrodes.Type: ApplicationFiled: September 21, 2015Publication date: March 23, 2017Inventors: Alexandre GOUREVITCH, Albert LIN, Isaac CHAN, Martin Paul GRUNTHANER, Prathit BUGNAIT, Seyed Mohammad NAVIDPOUR, Sumant RANGANATHAN
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Publication number: 20160313825Abstract: Electrode configurations for reducing wobble error for a stylus translating on a surface over and between electrodes of a touch sensor panel is disclosed. In some examples, electrodes associated with a more linear signal profile are correlated with lower wobble error. In some examples, electrodes are coupled to adjacent electrodes via diffusing resistors such that the signal profile for each electrode is spread to be more linear. In some configurations, the value of the diffusing resistors and series resistance associated with an electrode is selected based on a desired signal profile for that electrode. In some examples, the series resistance can include a trace resistance and a compensating resistance. The compensating resistance can compensate for a variance in trace resistance between electrodes, thus making series resistance substantially equal for each of the electrodes.Type: ApplicationFiled: September 26, 2015Publication date: October 27, 2016Inventors: Steven P. HOTELLING, Vivek PANT, Prathit BUGNAIT, Isaac CHAN
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Publication number: 20160313858Abstract: Touch sensor panel configurations for reducing wobble error for a stylus translating on a surface over and between electrodes of the touch sensor panel are disclosed. In some examples, electrodes with more linear signal profiles are correlated with lower wobble error. In some examples, diffusing elements formed of floating segments of conductive materials can diffuse signal from a stylus to a plurality of electrodes, thus, making the signal profiles associated with the electrodes more linear. In addition, diffusing elements can be configured to improve the optical uniformity of the touch sensor panel. In some examples, the diffusing elements can be formed on the same layer as floating dummy pixels and resemble a plurality of merged floating dummy pixels.Type: ApplicationFiled: September 30, 2015Publication date: October 27, 2016Inventors: Isaac CHAN, Prathit BUGNAIT, Albert LIN, Chun-Hao TUNG, Sunggu KANG, John Z. ZHONG