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公开(公告)号：US10120509B2
公开(公告)日：2018-11-06
申请号：US14982349
申请日：2015-12-29
Applicant: STMICROELECTRONICS ASIA PACIFIC PTE LTD
Inventor： Praveesh Chandran , Lokesh Kumar Korapati , Mythreyi Nagarajan
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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202.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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公开(公告)号：US20180232071A1
公开(公告)日：2018-08-16
申请号：US15953017
申请日：2018-04-13
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Chee Weng CHEONG , Leonard Liviu DINU , Dianbo GUO , Kien Beng TAN
IPC: G06F3/0354 , G06F3/041 , G06F3/038 , H04L27/00
CPC classification number: G06F3/03545 , G06F3/038 , G06F3/041 , G06F3/0416 , G06F2203/0384 , H04L2027/0097
Abstract: A system and method for synchronizing two devices in communication with each other. When communication between the two devices is to be established, a synchronization process may be invoked. In an embodiment, a first device may initiate sending synchronization signals having rising edge and falling edge pairs. The second device may include a controller configured to receive the synchronization signals. However, noise may inhibit the ability of the controller to correctly receive and/or interpret the synchronization signals. Noise may cause detection components to falsely detect noise as a synchronization signal or may cause detection components to miss detection of an actual synchronization signal. A window generator may be used to generate comparison windows for the controller to detect synchronization signals. Further, the detection window duration and start times may be adjusted based on previously detected (or undetected) synchronization signals in order to compensate for noise overshadowing synchronization signals.
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204.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：US20180173357A1
公开(公告)日：2018-06-21
申请号：US15384494
申请日：2016-12-20
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Dylan Park , John Serge Georges Nankoo
CPC classification number: G06F3/0416 , G06F3/044 , G06F2203/04101 , G06F2203/04111
Abstract: The present disclosure provides a capacitive sensing structure for detecting a force touch in a touchscreen application. Performance uniformity of the force touch sensor is improved by providing a capacitive force touch structure having dot-pattern sensing electrodes of varying thickness, wherein the variation in electrode thickness corresponds to a relative displacement potential of portions of the sensing electrode. This variation in thickness improves performance uniformity of the force sensor by compensating for the displacement potential (i.e., flexibility) of the sensing electrodes so that a force touch applied to the touch surface is measured consistently regardless of the location of the force touch on the touch surface.
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Patent Agency Ranking
206.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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公开(公告)号：US20180157367A1
公开(公告)日：2018-06-07
申请号：US15368203
申请日：2016-12-02
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Leonard Liviu Dinu
CPC classification number: G06F3/0416 , G06F3/044
Abstract: A touch screen controller includes a current conveyor having first and second inputs and first and second outputs, the first input being coupled to a self capacitance sense line. A driver is coupled to the second input and periodically drives the second input between high and low voltages. The current conveyor forces its first input to a same voltage as its second input, and replicates a current flowing into its first input at its first and second outputs, such that when the driver drives the second input to the high voltage, a first current flows from the first input into the self capacitance sense line, and when the driver drives the second input to the low voltage, a second current flows from the self capacitance sense line into the first input, and the current conveyor replicates the second current to its first and second outputs.
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公开(公告)号：US20180106744A1
公开(公告)日：2018-04-19
申请号：US15833806
申请日：2017-12-06
Applicant: STMicroelectronics Asia Pacific Pte Ltd.
Inventor： Archit Giridhar , Teck Khim Neo
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：US09939959B2
公开(公告)日：2018-04-10
申请号：US15822456
申请日：2017-11-27
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Jerry Kim , Tae-gil Kang , Glen Kang , Rooney Kim
CPC classification number: G06F3/0418 , G06F3/044 , G06F2203/04104
Abstract: A method for multi-touch integrity sensing for a multi-touch capacitive touch screen is disclosed. By determining the integrity of touches, a distinction is identified between wanted touches, such as via a finger or stylus, and unwanted touches such as via foreign matter, errors, and the like.
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公开(公告)号：US20180083606A1
公开(公告)日：2018-03-22
申请号：US15811223
申请日：2017-11-13
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Beng-Heng Goh
CPC classification number: H03K5/15033 , H03K23/502 , H03L7/16 , H03L7/183 , H03L7/1974
Abstract: A circuit includes a counter circuit, a logic circuit, and a clock divider. The counter circuit includes a clock divider counter to be loaded with most significant bits of a divider value, and decremented at a same edge of each pulse of a clock signal. The logic circuit compares a value contained in the divider counter to a reference value and generates an end count signal as a function of the value contained in the divider counter matching the reference value, and transitions a toggle signal at a same edge of each pulse of the end count signal. The clock divider counter is reloaded with the most significant bits of the divider value as a function of the end count signal. The clock divider generates a divided version of the clock signal as a function of the toggle signal.
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