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11.发明授权公开(公告)号：US10338746B1
公开(公告)日：2019-07-02
申请号：US15873973
申请日：2018-01-18
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Kusuma Adi Ningrat , Ade Putra
CPC classification number: G06F3/0418 , G06F3/0414 , G06F3/044
Abstract: Disclosed herein is a touch screen controller operable with a touch screen having force lines and sense lines. The touch screen controller includes drive circuitry driving the force lines with a force signal in a touch data sensing mode and not driving the force lines in a noise sensing mode. Sense circuitry senses data at the sense lines in the touch data sensing mode and the noise sensing mode. Processing circuitry samples the data, multiplies the data by a sine multiplier to produce imaginary data, sums the imaginary data, multiplies the data by a cosine multiplier to produce real data, sums the real data, and determines magnitude values of the data as a function of the imaginary data and the real data.
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公开(公告)号：US09996194B1
公开(公告)日：2018-06-12
申请号：US15362434
申请日：2016-11-28
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Ade Putra , Kusuma Adi Ningrat
CPC classification number: G06F3/0418 , G06F3/044 , G06F2203/04108
Abstract: A method for touch screen self-capacitance foreign matter detection for a capacitive touch screen is disclosed. By iteratively performing methods of self-capacitance scanning and foreign matter scanning foreign matter may be detected.
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公开(公告)号：US09990091B2
公开(公告)日：2018-06-05
申请号：US14753129
申请日：2015-06-29
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Chee Weng Cheong , EngJye Ng , Dianbo Guo , Chaochao Zhang , Kusuma Adi Ningrat
CPC classification number: G06F3/044
Abstract: A charge sensing circuit generates a voltage in a sensing period that is indicative of sensed charge. The generated voltages are accumulated by an accumulator circuit over a number of sensing periods. A noise detection circuit senses when the voltage generated by the charge sensing circuit is outside of a boundary and generates a detection signal in response thereto. A control circuit, in response to the detection signal, controls the accumulator circuit to block accumulation of the voltages generated by the charge sensing circuit during at least the sensing period in which the detection signal is generated. An analog-to-digital converter circuit then converts an accumulated output voltage from the accumulator circuit to a digital value at the end of an accumulation time period that includes the sensing periods. The end of the accumulation time period is delayed by at least one sensing period in response to the detection signal.
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公开(公告)号：US09977546B2
公开(公告)日：2018-05-22
申请号：US14319715
申请日：2014-06-30
Applicant: STMICROELECTRONICS ASIA PACIFIC PTE LTD
Inventor： Kusuma Adi Ningrat , Manivannan Ponnarasu
CPC classification number: G06F3/044 , G06F3/041 , G06F3/0418 , G06F2203/04104 , G06F2203/04108
Abstract: Groove analysis in a device having a tactile input surface suited to detect more than one tactile input at a time. Using groove analysis allows a touch screen device a more robust and efficient algorithm for distinguishing between two different tactile inputs. The touch screen device may include a touch screen controller that includes an analysis circuit for determining grooves between touch inputs. Generally, when a touch input is received at the surface of a touch screen device, the touch screen may register touch strength signals at each of a plurality of touch regions. A groove may be generally defined as a touch region that exhibits a touch strength signal that is less than surrounding touch regions. Once all touch regions are analyzed by a groove analysis, various touch regions determined to grooves may be eliminated from a further analysis to determine the XY coordinates of actual touch inputs.
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15.发明授权Capacitive touch screen with adaptive touch sensing threshold based on sharpness of the capacitive data 有权电容式触摸屏，具有基于电容数据清晰度的自适应触摸感应阈值公开(公告)号：US09524067B2
公开(公告)日：2016-12-20
申请号：US14484372
申请日：2014-09-12
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Jenn Woei Soo , Kusuma Adi Ningrat
CPC classification number: G06F3/044 , G06F2203/04108
Abstract: A capacitive touch system generates data indicative of sensed capacitance measured at capacitive sensing nodes of a capacitive touch panel. A signal processing circuit is coupled to receive the data indicative of sensed capacitance from the capacitive touch system. The signal processing circuit operates to fit a parabolic curve to the data indicative of sensed capacitance. A sharpness of the fit parabolic curve is indicative of whether touch versus hover interaction with the capacitive touch panel. A touch detection threshold is as a function of the determined sharpness. The set touch detection threshold is then applied against the data indicative of sensed capacitance in order to make a touch detection.
Abstract translation: 电容式触摸系统产生指示在电容式触摸面板的电容感测节点处测量的感测电容的数据。 信号处理电路被耦合以从电容式触摸系统接收指示感测电容的数据。 信号处理电路用于将抛物线曲线拟合到指示感测电容的数据。 合适的抛物线曲线的清晰度表示触摸与悬浮与电容式触摸面板的相互作用。 触摸检测阈值是确定的清晰度的函数。 然后针对指示感测电容的数据施加设置的触摸检测阈值，以进行触摸检测。
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Patent Agency Ranking
公开(公告)号：US20230379200A1
公开(公告)日：2023-11-23
申请号：US18364308
申请日：2023-08-02
Applicant: STMicroelectronics Asia Pacific Pte Ltd.
Inventor： Ade Putra , Kusuma Adi Ningrat , Mythreyi Nagarajan
CPC classification number: H04L27/22 , G06F3/04166 , G06F3/04162 , H03M1/124
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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17.发明申请公开(公告)号：US20190220142A1
公开(公告)日：2019-07-18
申请号：US15873973
申请日：2018-01-18
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Kusuma Adi Ningrat , Ade Putra
CPC classification number: G06F3/0418 , G06F3/0414 , G06F3/044
Abstract: Disclosed herein is a touch screen controller operable with a touch screen having force lines and sense lines. The touch screen controller includes drive circuitry driving the force lines with a force signal in a touch data sensing mode and not driving the force lines in a noise sensing mode. Sense circuitry senses data at the sense lines in the touch data sensing mode and the noise sensing mode. Processing circuitry samples the data, multiplies the data by a sine multiplier to produce imaginary data, sums the imaginary data, multiplies the data by a cosine multiplier to produce real data, sums the real data, and determines magnitude values of the data as a function of the imaginary data and the real data.
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18.发明申请公开(公告)号：US20180373364A1
公开(公告)日：2018-12-27
申请号：US16117277
申请日：2018-08-30
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Baranidharan Karuppusamy , Chaochao Zhang , Kusuma Adi Ningrat
CPC classification number: G06F3/044 , G06F3/0418
Abstract: Disclosed herein is a touch screen controller for controlling touch sensing in a touch screen display, the touch screen display having a display layer controlled as a function of horizontal sync and vertical sync signals and a capacitive touch array comprised of drive lines and sense lines. The touch screen controller includes a driver and control circuitry. The control circuitry is configured to cause the driver to generate a driving signal on the drive lines during assertion of the horizontal sync signal, and cause the driver to generate the driving signal on the drive lines during assertion of the vertical sync signal. Analog touch sensing circuitry is configured to generate analog touch data as a function of signals on the sense lines resulting from generation of the drive signal on the drive lines.
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19.发明授权公开(公告)号：US10088965B2
公开(公告)日：2018-10-02
申请号：US15381489
申请日：2016-12-16
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Baranidharan Karuppusamy , Chaochao Zhang , Kusuma Adi Ningrat
Abstract: Disclosed herein is a touch screen controller for controlling touch sensing in a touch screen display, the touch screen display having a display layer controlled as a function of horizontal sync and vertical sync signals and a capacitive touch array comprised of drive lines and sense lines. The touch screen controller includes a driver and control circuitry. The control circuitry is configured to cause the driver to generate a driving signal on the drive lines during assertion of the horizontal sync signal, and cause the driver to generate the driving signal on the drive lines during assertion of the vertical sync signal. Analog touch sensing circuitry is configured to generate analog touch data as a function of signals on the sense lines resulting from generation of the drive signal on the drive lines.
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20.发明申请公开(公告)号：US20180173336A1
公开(公告)日：2018-06-21
申请号：US15381489
申请日：2016-12-16
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Baranidharan Karuppusamy , Chaochao Zhang , Kusuma Adi Ningrat
CPC classification number: G06F3/044 , G06F3/0418
Abstract: Disclosed herein is a touch screen controller for controlling touch sensing in a touch screen display, the touch screen display having a display layer controlled as a function of horizontal sync and vertical sync signals and a capacitive touch array comprised of drive lines and sense lines. The touch screen controller includes a driver and control circuitry. The control circuitry is configured to cause the driver to generate a driving signal on the drive lines during assertion of the horizontal sync signal, and cause the driver to generate the driving signal on the drive lines during assertion of the vertical sync signal. Analog touch sensing circuitry is configured to generate analog touch data as a function of signals on the sense lines resulting from generation of the drive signal on the drive lines.
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