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41.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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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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Patent Agency Ranking
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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公开(公告)号：US09846665B2
公开(公告)日：2017-12-19
申请号：US14534091
申请日：2014-11-05
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Chaochao Zhang , Chee Weng Cheong , Dianbo Guo
IPC: G06F13/364 , G06F5/06 , G06F13/42
CPC classification number: G06F13/364 , G06F5/065 , G06F13/4282 , G06F2205/067
Abstract: A master-slave circuit is disclosed that maintains synchronization between two integrated circuit chips, using minimal chip resources. In one embodiment, a single, bidirectional communication path is shared by the two chips. Meanwhile, only one I/O port on each chip is used to send and receive signals via the bidirectional communication path. The first chip to detect a signal event is designated the master and controls the bidirectional communication path. The master can communicate the status to the other chip by controlling the logic state of the I/O ports. When the second chip detects that the I/O port is controlled by the first chip, the second chip will logically deduce that it is now the slave. If both chips detect the signal event at substantially the same time, one of the two chips is pre-programmed to assume control of the I/O port as the master.
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48.发明授权公开(公告)号：US09703946B2
公开(公告)日：2017-07-11
申请号：US14231360
申请日：2014-03-31
Applicant: STMICROELECTRONICS ASIA PACIFIC PTE LTD
Inventor： Praveesh Chandran , Ravi Bhatia
CPC classification number: G06F21/44 , G06F3/03545 , G06F3/0383 , G06F3/0416 , G06F21/445 , G06F2203/0384 , G09G5/12 , G09G2354/00
Abstract: A method of pairing an intelligent input device with an electronic device includes transmitting a start pairing identifier and receiving a unique identifier that identifies the intelligent input device. The method further includes authenticating the unique identifier using authentication information stored in the electronic device and transmitting a pairing successful identifier responsive to the unique identifier being authenticated to thereby pair the intelligent input device and the electronic device.
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公开(公告)号：US09671910B2
公开(公告)日：2017-06-06
申请号：US14522098
申请日：2014-10-23
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Leonard Dinu , Chao Chao Zhang , Dianbo Guo , Chee Weng Cheong , Eng Jye Ng
IPC: G06F3/038 , G06F3/0354 , G06F3/041 , G06F3/044
CPC classification number: G06F3/044 , G06F3/03545 , G06F3/038 , G06F3/0416 , G06F2203/04104 , G06F2203/04106
Abstract: An electronic device may include a first controller associated with some channels of a digitizer having channels configured to receive a signal from a stylus, and with each channel having a direction. A second controller may be associated with channels of the digitizer not associated with the first controller. The first controller may scan for the signal at each channel associated with the first controller, and based on acquisition of the signal at a given channel associated with the first controller, calculate a property of the signal. The first controller may send the calculated property and the direction of the given channel to the second controller. The first controller and the second controller may scan for the signal at each channel having the direction of the given channel, at acquisition intervals based upon the calculated property.
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公开(公告)号：US20170075469A1
公开(公告)日：2017-03-16
申请号：US14852847
申请日：2015-09-14
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Praveesh Chandran , Gee Heng Loh , Ravi Bhatia , Ys On
CPC classification number: G06F3/0416 , G06F3/044 , G06F2203/04108
Abstract: Disclosed is a touch sensor and method for detecting a touch in a capacitive touchscreen application, wherein the touch sensor is capable of distinguishing between a finger hovering above the touch sensor and a touch from a stylus having a small contact surface area without having to adjust the sensitivity of the touch sensor. The touch sensor includes a first sensing electrode, a transmit electrode, and a second sensing electrode, wherein the second sensing electrode is positioned substantially around the perimeter of the inner circuitry (i.e., transmit electrode and first sensing electrode). A touch is detected by sensing changes in a first capacitance between the transmit electrode and first sensing electrode and a second capacitance between the transmit electrode and second sensing electrode. The changes in the first and second capacitances are compared to determine whether the changes in the capacitances are due to a finger hover or a touch.
Abstract translation: 公开了用于检测电容式触摸屏应用中的触摸的触摸传感器和方法，其中触摸传感器能够区分在触摸传感器上方悬停的手指和具有小接触表面积的触针的触摸，而不必调整 触摸传感器的灵敏度。 触摸传感器包括第一感测电极，发射电极和第二感测电极，其中第二感测电极基本上围绕内部电路（即发射电极和第一感测电极）的周边定位。 通过感测发射电极和第一感测电极之间的第一电容的变化以及发射电极和第二感测电极之间的第二电容来检测触摸。 比较第一和第二电容的变化，以确定电容的变化是由于手指悬停还是触摸。
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