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公开(公告)号：US20180059818A1
公开(公告)日：2018-03-01
申请号：US15247106
申请日：2016-08-25
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Leonard Liviu Dinu , Chee Weng Cheong , Eng Jye Ng
CPC classification number: G06F3/044 , G06F3/0418
Abstract: An electronic device disclosed herein includes a display layer generating display noise based on scanning thereof, and a sensing layer including a plurality of sense lines. A common voltage layer is coupled to the display layer and the sensing layer, with the common voltage layer capacitively coupling the display noise from the display layer to the each of the plurality of sense lines of the sensing layer via a different parasitic impedance. An amplitude of the display noise seen at an input to each sense line is a function of a location of that sense line. The electronic device includes a plurality of compensation impedances, with each compensation impedance coupled to a different one of the plurality of sense lines. Each of the plurality of compensation impedances has an impedance value such that an amplitude of the display noise at an output of each sense line is substantially equal.
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公开(公告)号：US09874986B2
公开(公告)日：2018-01-23
申请号：US14945620
申请日：2015-11-19
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Yannick Guedon , Sze-Kwang Tan , Dianbo Guo
CPC classification number: G06F3/044 , G06F3/0414 , G06F3/0416 , G06F2203/04103 , G06F2203/04108
Abstract: A readout device for a capacitive sense matrix includes a computer readable storage medium configured to store capacitance data. The capacitance data represents capacitance values of the capacitive sense matrix. The readout device also includes a readout circuit configured to receive a signal from the capacitive sense matrix, the readout circuit being configured based upon the capacitance data. Also described are a readout method and a method of compensating for variations in capacitance.
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公开(公告)号：US09863902B2
公开(公告)日：2018-01-09
申请号：US14200928
申请日：2014-03-07
Applicant: STMicroelectronics Asia Pacific Pte Ltd.
Inventor： Archit Giridhar , Teck Khim Neo
CPC classification number: G01N27/07 , G01F22/00 , Y10T29/49165
Abstract: A resistive microelectronic fluid sensor implemented as an integrated voltage divider circuit can sense the presence of a fluid within a fluid reservoir, identify the fluid, and monitor fluid temperature or volume. Such a sensor has biomedical, industrial, and consumer product applications. After fluid detection, the fluid can be expelled from the reservoir and replenished with a fresh supply of fluid. A depression at the bottom of the sample reservoir allows a residual fluid to remain undetected so as not to skew the measurements. Electrodes can sense variations in the resistivity of the fluid, indicating a change in the fluid chemical composition, volume, or temperature. Such fluctuations that can be electrically sensed by the voltage divider circuit can be used as a thermal actuator to trigger ejection of all or part of the fluid sample.
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公开(公告)号：US09817530B2
公开(公告)日：2017-11-14
申请号：US14840556
申请日：2015-08-31
Applicant: STMICROELECTRONICS ASIA PACIFIC PTE LTD
Inventor： Kusuma Adi Ningrat , Lokesh Kumar Korapati , Jerry Kim
CPC classification number: G06F3/044 , G06F3/0418
Abstract: 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.
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公开(公告)号：US20170293394A1
公开(公告)日：2017-10-12
申请号：US15093878
申请日：2016-04-08
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Rooney Kim , Lokesh Kumar Korapati
CPC classification number: G06F3/0418 , G06F3/044
Abstract: 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.
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Patent Agency Ranking
公开(公告)号：US09714973B2
公开(公告)日：2017-07-25
申请号：US14550415
申请日：2014-11-21
Applicant: STMICROELECTRONICS ASIA PACIFIC PTE LTD
Inventor： Dianbo Guo , EngJye Ng , Abhishek Singh
CPC classification number: G01R31/025 , G01R31/024 , G01R31/08 , G06F3/0418 , G06F3/044 , G06F2203/04111
Abstract: A microelectronic short circuit detection module is disclosed that locates and distinguishes among different types of short circuits in touch screen panels. Individual short circuit detection circuits are coupled to force and sense lines throughout a wire matrix within the touch screen. If the line is shorted to a neighboring line or any other line carrying an opposite logic state, its logic state will be corrupted by the short and will be held at a value opposite that of the intended input signal. Comparing the input and the output therefore provides an indicator of a short circuit to another force or sense line in the wire matrix. A pair of pull up/down stages is engaged to detect whether the short is coupled to power or ground. A threshold resistor can be varied to adjust detection sensitivity. By conducting a serial test, matrix coordinates of the short circuit can be identified.
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公开(公告)号：US09710104B2
公开(公告)日：2017-07-18
申请号：US14245915
申请日：2014-04-04
Applicant: STMicroelectronics Asia Pacific Pte. Ltd.
Inventor： CheeWeng Cheong , Leonard Dinu , Dianbo Guo , Kien Beng Tan
IPC: G06F3/041
CPC classification number: G06F3/0418
Abstract: A touch screen device having a touch screen panel and a method for operating a touch screen device are provided. The method includes monitoring, during a noise monitoring phase, channel signals of a first set of channels and a second set of channel of the touch screen panel, detecting a stylus signal in response to a channel signal greater than a stylus threshold and less than a palm threshold, selecting the first set of channels when the stylus signal is detected on at least one channel of the first set of channels and is not detected on the second set of channels, and selecting the second set of channels when the stylus signal is detected on at least one channel of the second set of channels and is not detected on the first set of channels.
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公开(公告)号：US20170185182A1
公开(公告)日：2017-06-29
申请号：US14982349
申请日：2015-12-29
Applicant: STMICROELECTRONICS ASIA PACIFIC PTE LTD
Inventor： Praveesh CHANDRAN , Lokesh Kumar KORAPATI , Mythreyi NAGARAJAN
CPC classification number: G06F3/044 , G02F1/133305 , G02F1/13338 , G06F3/0418 , G06F2203/04102
Abstract: 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.
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公开(公告)号：US20170177136A1
公开(公告)日：2017-06-22
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
CPC classification number: G06F3/0416 , G06F3/03545 , G06F3/044 , G06F2203/04106
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：US09626049B2
公开(公告)日：2017-04-18
申请号：US14269295
申请日：2014-05-05
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Praveesh Chandran , Chee Yu Ng
CPC classification number: G06F3/044 , G06F3/0416 , G06F2203/04101
Abstract: A capacitive touch panel includes a first sensor pattern and second sensor pattern. The first sensor pattern supports mutual-capacitance detection and the second sensor pattern supports self-capacitance detection. The first sensor pattern includes row conductors and column conductors which intersect each other at mutual-capacitance sensing locations. The second sensor pattern includes island conductors. The island conductors are grouped in clusters of conductors, each cluster providing a self-capacitance sensing location. Control circuitry coupled to the first and second sensor patterns functions to make touch/hover position detections by sensing changes in capacitance at the mutual-capacitance and self-capacitance nodes. The row and column conductors include openings, and the island conductors are positioned in vertical alignment with corresponding openings in the conductors.
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