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11.发明申请公开(公告)号：US20180188878A1
公开(公告)日：2018-07-05
申请号：US15397340
申请日：2017-01-03
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Manivannan Ponnarasu , Mythreyi Nagarajan
CPC classification number: G06F3/0418
Abstract: Disclosed herein is a touch screen controller operable with a touch screen. The touch screen controller includes input circuitry configured to receive touch data from the touch screen, and processing circuitry. The processing circuitry is configured to identify an island in the touch data, determine whether a horizontal groove is present in the island, determine whether a vertical groove is present in the island, and determine whether a diagonal groove is present in the island. The processing circuitry determines the island to indicate a single elongated touch where a diagonal groove is present in the island but horizontal and vertical grooves are not present in the island.
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公开(公告)号：US20220353119A1
公开(公告)日：2022-11-03
申请号：US17245890
申请日：2021-04-30
Applicant: STMicroelectronics Asia Pacific Pte Ltd.
Inventor： Ade Putra , Kusuma Adi NINGRAT , Mythreyi Nagarajan
Abstract: A device includes an analog to digital converter configured to convert voltages into a digital signal by sampling the voltages at a fixed sampling time; a first multiplier configured to multiply the digital signal with in-phase coefficients, the in-phase coefficients generated to produce a demodulated in-phase signal at a demodulation signal frequency; a first adder configured accumulate the demodulated in-phase signal to output in-phase magnitude values; a second multiplier configured to multiply the digital signal with quadrature coefficients, the quadrature coefficients generated to produce a demodulated quadrature signal at the demodulation signal frequency; and a second adder configured to accumulate the demodulated quadrature signal to output quadrature magnitude values.
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Patent Agency Ranking
公开(公告)号：US10481723B2
公开(公告)日：2019-11-19
申请号：US15337167
申请日：2016-10-28
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Manivannan Ponnarasu , Mythreyi Nagarajan
IPC: G06F3/041
Abstract: Disclosed herein is a touch screen controller that calculates a variance of an island in acquired touch data values. Where the variance exceeds a variance threshold, the island is validated as a representing touch. Where the variance does not exceed the variance threshold, whether the island represents a touch or a hover is determined by calculating a sharpness by applying weights to nodes of the island, where neighboring nodes adjacent to a peak node are weighted less than non-neighboring nodes not adjacent to the peak node. An island strength threshold is determined as a function of a product of the variance and the sharpness. It is determined that the island represents a touch where a highest touch data value of the island is greater than the island strength threshold, and a hover where the highest touch data value of the island is less than the island strength threshold.
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公开(公告)号：US10365764B2
公开(公告)日：2019-07-30
申请号：US15207105
申请日：2016-07-11
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Lokesh Kumar Korapati , Manivannan Ponnarasu , Mythreyi Nagarajan
Abstract: 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.
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公开(公告)号：US10175807B2
公开(公告)日：2019-01-08
申请号：US14974299
申请日：2015-12-18
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Praveesh Chandran , Manivannan Ponnarasu , Mythreyi Nagarajan
IPC: G06F3/041 , G06F3/0354 , G06F3/044
Abstract: An electronic device disclosed herein includes a touch screen controller to identify an island i.e., a matrix of acquired touch data values, the island including adjacent touch data values indicating a potential touch of a touch sensitive screen. A first sharpness of the island is calculated using a first normalization type and not a second normalization type. A second sharpness of the island is calculated using the first and second normalization types if the first sharpness is greater than the sharpness threshold. A dynamic variance threshold is determined as a function of the second sharpness. A dynamic strength threshold is determined as a function of the second sharpness if a variance of the island is greater than the dynamic variance threshold, and the island is determined to be a valid stylus island if the peak strength is greater than the dynamic strength threshold.
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公开(公告)号：US20180121010A1
公开(公告)日：2018-05-03
申请号：US15337167
申请日：2016-10-28
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Manivannan Ponnarasu , Mythreyi Nagarajan
CPC classification number: G06F3/0416 , G06F3/044 , G06F2203/04101
Abstract: Disclosed herein is a touch screen controller that calculates a variance of an island in acquired touch data values. Where the variance exceeds a variance threshold, the island is validated as a representing touch. Where the variance does not exceed the variance threshold, whether the island represents a touch or a hover is determined by calculating a sharpness by applying weights to nodes of the island, where neighboring nodes adjacent to a peak node are weighted less than non-neighboring nodes not adjacent to the peak node. An island strength threshold is determined as a function of a product of the variance and the sharpness. It is determined that the island represents a touch where a highest touch data value of the island is greater than the island strength threshold, and a hover where the highest touch data value of the island is less than the island strength threshold.
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17.发明授权公开(公告)号：US09229576B2
公开(公告)日：2016-01-05
申请号：US13648149
申请日：2012-10-09
Inventor： HonSiong Ng , Praveesh Chandran , Mythreyi Nagarajan , Ravi Bhatia
IPC: G06F3/041
CPC classification number: G06F3/0418
Abstract: A method comprises during a frame period finding a first EFT noise influenced sensor of a touch screen panel, determining whether the first EFT noise influenced sensor is located at a last transmitting/driving line of the touch screen panel, designating the frame period as a noise influenced frame period using an absolute value threshold if the first EFT noise influenced sensor is not located at the last transmitting/driving line and designating the frame period as the noise influenced frame period using a percentage threshold if the first EFT noise influenced sensor is located at the last transmitting/driving line.
Abstract translation: 一种方法包括在帧周期期间找到触摸屏面板的第一EFT噪声影响传感器，确定所述第一EFT噪声影响传感器是否位于所述触摸屏面板的最后发射/驱动线上，将所述帧周期指定为噪声 如果第一EFT噪声影响传感器不位于最后的发射/驱动线路，并且如果第一EFT噪声影响传感器位于位置时，使用百分比阈值指定帧周期作为噪声影响帧周期，则使用绝对值阈值 最后一个发射/行驶线。
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