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公开(公告)号：US20200081062A1
公开(公告)日：2020-03-12
申请号：US16128645
申请日：2018-09-12
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Beng-Heng GOH
IPC: G01R31/3177 , H03K19/20 , H03K5/133 , G06F1/10
Abstract: A glitch detector includes an input flip-flop clocked by a clock signal and having a non-inverting data output, an inverting data output, and a data input receiving input from the inverting data output, the input flip-flop generating a divided version of the clock signal at the non-inverting data output. A configurable delay chain receives the divided version of the clock signal and generates a delayed version of the divided version of the clock signal as a delay output. An intermediate flip-flop clocked by the clock signal has a data input receiving the delay output, the intermediate flip-flop generating an intermediate output as a function of the delay output. A logic circuit receives the divided version of the clock signal and the intermediate output, and generates a glitch detect signal by performing a logical operation on the divided version of the clock signal and the intermediate output.
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32.发明授权公开(公告)号：US10558311B2
公开(公告)日：2020-02-11
申请号：US16117277
申请日：2018-08-30
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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33.发明申请公开(公告)号：US20200045303A1
公开(公告)日：2020-02-06
申请号：US16514695
申请日：2019-07-17
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Hong Chean CHOO , Lookah CHUA , Wai Yin HNIN
Abstract: An electronic device includes a test voltage generation circuit to generate a test voltage as a function of a regulator voltage, and a switching circuit to receive the test voltage and an image pixel output signal, and to pass the test voltage as output when in a test mode. A comparison circuit receives the output from the switching circuit and an analog to digital conversion signal, and asserts a counter reset signal when the output from the switching circuit and the analog to digital conversion signal are equal in voltage. A counter begins counting at a beginning of each test cycle within the test mode, stops counting upon assertion of the counter rest signal, and outputs its count upon stopping counting. The count is proportional to the test voltage when in the test mode.
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公开(公告)号：US10528191B2
公开(公告)日：2020-01-07
申请号：US16406205
申请日：2019-05-08
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Kusuma Adi Ningrat , Ade Putra
Abstract: A touch screen controller includes drive circuitry driving 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 sensing touch data at the sense lines in the touch data sensing mode and sensing noise data at the sense lines during the noise sensing mode. Processing circuitry: a) samples the noise data, b) performs trigonometric manipulations of the noise data to produce imaginary noise data and real noise data, and c) determines a noise magnitude value of the noise data as a function of the imaginary noise data and the real noise data. In the noise sensing mode, (a)-(c) are performed for each of a plurality of possible sampling frequencies to be used in the touch data sensing mode in order to determine which sampling frequency is to be used in the touch data sensing mode.
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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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Patent Agency Ranking
公开(公告)号：US10418982B2
公开(公告)日：2019-09-17
申请号：US16113235
申请日：2018-08-27
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Beng-Heng Goh
Abstract: A method includes loading a clock divider counter with most significant bits (MSBs) of a divider value, decrementing the counter at a same edge of each pulse of a clock signal, and comparing a value contained in the counter to a reference value and generating an end count signal if the value contained in the counter matches the reference value. If the value is even, the reference value is set to 1. If the value is odd, the reference value is set to 1, except for every other assertion of the end count signal, where the reference value is instead set to 0. A toggle signal transitions at a same edge of each pulse of the end count signal. The counter is reloaded with MSBs of the divider value based upon the end count signal. A divided version of the clock signal is generated based upon the toggle signal.
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37.发明申请公开(公告)号：US20190250731A1
公开(公告)日：2019-08-15
申请号：US15893207
申请日：2018-02-09
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Manivannan Ponnarasu
Abstract: Disclosed herein is a touch screen controller operable with a touch screen. The touch screen controller includes input circuitry to receive touch data from the touch screen, and processing circuitry. The processing circuitry acquires mutual capacitance touch strength values from the touch screen, determines when the mutual capacitance touch strength values define a pre-validated donut touch pattern, and reads self capacitance touch strength values for lines that are contained within bounds of the pre-validated donut touch pattern. If the self capacitance touch strength values for lines contained within bounds of the pre-validate donut touch pattern contain a singular peak value, the processing circuitry validates the pre-validated donut touch pattern as representing a single touch.
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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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39.发明申请公开(公告)号：US20190204979A1
公开(公告)日：2019-07-04
申请号：US16220500
申请日：2018-12-14
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Cam Chung LA , Kien Beng TAN
Abstract: A device includes a touch and pressure sensitive screen having touch pressure sensors and a controller. The controller acquires touch pressure data from the plurality of touch pressure sensors. For each touch pressure sensor, the controller determines whether the touch pressure data from that touch pressure sensor is indicative of abnormal operation of that touch pressure sensor. Where no abnormal operation is indicated, the controller sums the touch pressure data from each of the touch pressure sensors to produce a touch pressure output. Where abnormal operation is indicated, the controller sums the touch pressure data from each of the touch pressure sensors and multiply the sum by a correction factor to produce the touch pressure output.
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公开(公告)号：US20190173458A1
公开(公告)日：2019-06-06
申请号：US16273317
申请日：2019-02-12
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Beng-Heng GOH , Yi Ren CHIN
CPC classification number: H03K5/1515 , G11C7/22 , G11C7/222 , G11C19/28 , G11C19/287 , H03L7/00
Abstract: An electronic device includes clock generation circuitry. The clock generation circuitry includes a first flip flop receiving as input a device clock and being triggered by an input clock and a second flip flop receiving, as input, output from the first flip flop and being triggered by the input clock. A first inverter receives output from the first flip flop as input and a second inverter receives output from the second flip flop as input. A first AND gate receives, as input, output from the second flip flop and the first inverter, and generates a first clock as output. A second AND gate receives, as input, output from the first flip flop and the second inverter, and generates a second clock as output.
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