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公开(公告)号：US20180107340A1
公开(公告)日：2018-04-19
申请号：US15847266
申请日：2017-12-19
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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公开(公告)号：US20180101266A1
公开(公告)日：2018-04-12
申请号：US15840438
申请日：2017-12-13
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：US20180101264A1
公开(公告)日：2018-04-12
申请号：US15838675
申请日：2017-12-12
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Chee Weng Cheong , Dianbo Guo , Kien Beng Tan , Yannick Guedon
CPC classification number: G06F3/044 , G06F3/041 , G06F3/0418
Abstract: A capacitive discharge circuit includes a line having a capacitance, a switched capacitor circuit including a capacitor, a switched circuit coupled to the line, and a voltage regulator coupled between the switched capacitor circuit and the switched circuit. A controller operates the switched capacitor circuit and switched circuit to in a first phase, charge the capacitor by coupling the capacitor between a common mode and a power supply, and in a second phase, discharge the capacitor by coupling the voltage regulator in series with the capacitor between the power supply node a ground. The controller is also configured to in a third phase, charge the capacitor by coupling the capacitor between the common mode and the power supply, and in a fourth phase, share charge between the line and the capacitor by coupling the voltage regulator and the capacitor in series between the line and the ground.
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公开(公告)号：US09933884B2
公开(公告)日：2018-04-03
申请号：US14811884
申请日：2015-07-29
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Manivannan Ponnarasu , Leo Lee
IPC: G06F3/041
CPC classification number: G06F3/0416 , G06F3/0418
Abstract: An electronic device includes a processor that acquires touch data values corresponding to different locations of a touch display, and identifies an island in the touch data that has touch data values acquired from adjacent locations of the touch display that indicate a potential touch. A first area of the island is determined from touch data values that exceed a first threshold value, and a second area of the island is determined from touch data values that exceed a second threshold value. If the first area is less than a multiple of the second area, coordinates of a location of the island are determined from the touch data values indicating the potential touch. If the first area is at least the multiple of the second area, coordinates of a location of the island are determined from the touch data values indicating the potential touch that exceed a third threshold value.
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45.发明申请公开(公告)号：US20180074619A1
公开(公告)日：2018-03-15
申请号：US15813906
申请日：2017-11-15
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Praveesh Chandran , Baranidharan Karuppusamy , Giuseppe Noviello , Chee Weng Cheong , Leonard Liviu Dinu , Dianbo Guo , Kien Beng Tan , Chaochao Zhang
IPC: G06F3/044 , G06F3/0354 , G06F3/041 , G06F3/038
CPC classification number: G06F3/044 , G06F3/03545 , G06F3/0383 , G06F3/0416
Abstract: An active stylus is capacitively coupled to a capacitive touch panel for communication. The active stylus operates in a wait mode to receive initial communications from the panel. In response to such receipt, the active stylus synchronizes to a repeating communications frame implementing time division multiplexing. Communications from the active stylus to the panel include: information communications; synchronization communications and communications specific for columns and/or rows of the panel. Communications from the panel to the active stylus may be addressed uniquely to the stylus or commonly to a group of styluses.
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Patent Agency Ranking
公开(公告)号：US20180020033A1
公开(公告)日：2018-01-18
申请号：US15208217
申请日：2016-07-12
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Beng Heng Goh
IPC: H04L29/06 , H04B14/06 , H04N19/66 , H04L12/863 , H04N19/463
CPC classification number: H04L65/607 , H04B14/062 , H04L47/50 , H04L65/604 , H04N19/463 , H04N19/66
Abstract: Disclosed herein is a method including receiving a stream of packets into a buffer, each packet having a processed video data portion and a page count portion, the processed video data portion being a result of a modulo operation performed on a word of video data, and the page count portion being a data page number on which the word of video data is to be placed. Each packet is read from the buffer, and an output packet including the video data portion and a data tag portion is generated therefrom. The data tag portion is associated with, but does not directly represent, the data page number where the word of video data of the processed video data portion or of video data of a processed video data portion of a next packet, is to be placed. Each data tag portion contains fewer bits than each corresponding page count portion.
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公开(公告)号：US20180018037A1
公开(公告)日：2018-01-18
申请号：US15208894
申请日：2016-07-13
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Kien Beng Tan
CPC classification number: G06F3/044 , G06F3/0414 , G06F3/0416 , G06F3/0418 , G06F2203/04105 , G06F2203/04111
Abstract: Disclosed herein is an electronic device including a first touch circuit to be coupled to a first touch sensing unit, the first touch sensing unit having first drive lines and first sense lines intersecting the first drive lines. A second touch circuit is to be coupled to a second touch sensing unit, the second touch sensing unit having second drive lines and second sense lines intersecting the second drive lines. A touch force circuit is to be coupled to a touch force sensing unit, the touch force sensing unit having third drive lines and third sense lines intersecting the third drive lines. The first touch circuit, second touch circuit, and touch force circuit are configured to drive the first, second, and third drive lines as a function of a synchronization signal, and acquire data from the first, second, and third sense lines as a function of the synchronization signal.
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公开(公告)号：US09864395B1
公开(公告)日：2018-01-09
申请号：US15367628
申请日：2016-12-02
Applicant: STMicroelectronics Design and Application S.R.O , STMicroelectronics Asia Pacific Pte Ltd
Inventor： Roman Prochazka , Chee Weng Cheong
IPC: G05F3/26
CPC classification number: G05F3/267
Abstract: A current mirror circuit includes an input current leg and an output current leg. The input current leg includes: a first bipolar junction transistor (BJT) having a collector terminal configured to receive an input current sourced at a current node and a first metal oxide semiconductor field effect transistor (MOSFET) having a gate terminal coupled to the current node and a source terminal coupled to a base terminal of the first BJT. The output current leg includes: a second BJT having a collector terminal configured to supply an output current and a second MOSFET having a gate terminal coupled to the current node and a source terminal coupled to a base terminal of the second BJT.
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公开(公告)号：US20180004349A1
公开(公告)日：2018-01-04
申请号：US15199792
申请日：2016-06-30
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Hugo GICQUEL , EngJye NG
CPC classification number: G06F3/0418 , G06F3/0412 , G06F3/0416 , G06F3/044 , G06F2203/04101 , G06F2203/04104
Abstract: A method of differential self-capacitance measurement is used to enhance a signal-to-noise ratio of sense lines in a touch panel display, thereby improving touch sensor accuracy. The differential self-capacitance measurement is implemented for a touch panel using charge sharing between adjacent sense lines of the touch panel matrix. Sequential differential self-capacitance measurements can be compared with one another by computing the difference |CS1−CS2|−|CS2−CS1| to sense a change caused by an intervening event. By scanning the entire touch panel matrix, events can be tracked across the touch panel.
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公开(公告)号：US09847778B1
公开(公告)日：2017-12-19
申请号：US15167216
申请日：2016-05-27
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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