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1. 发明授权

US09671910B2 Multiple controller communication method for active stylus data acquisition 有权
公开(公告)号：US09671910B2
公开(公告)日：2017-06-06
申请号：US14522098
申请日：2014-10-23
申请人： STMicroelectronics Asia Pacific Pte Ltd
发明人： Leonard Dinu , Chao Chao Zhang , Dianbo Guo , Chee Weng Cheong , Eng Jye Ng
IPC分类号： G06F3/038 , G06F3/0354 , G06F3/041 , G06F3/044
CPC分类号： G06F3/044 , G06F3/03545 , G06F3/038 , G06F3/0416 , G06F2203/04104 , G06F2203/04106
摘要： 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.

2. 发明申请

US20160117047A1 MULTIPLE CONTROLLER COMMUNICATION METHOD FOR ACTIVE STYLUS DATA ACQUISITION 有权
标题翻译：用于主动数据采集的多控制器通信方法
公开(公告)号：US20160117047A1
公开(公告)日：2016-04-28
申请号：US14522098
申请日：2014-10-23
申请人： STMicroelectronics Asia Pacific Pte Ltd
发明人： Leonard Dinu , Chao Chao Zhang , Dianbo Guo , Chee Weng Cheong , Eng Jye Ng
IPC分类号： G06F3/041 , G06F3/038 , G06F3/044 , G06F3/0354
CPC分类号： G06F3/044 , G06F3/03545 , G06F3/038 , G06F3/0416 , G06F2203/04104 , G06F2203/04106
摘要： 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.
摘要翻译：电子设备可以包括与数字转换器的一些通道相关联的第一控制器，其具有被配置为从触控笔接收信号的通道，并且每个通道具有方向。第二控制器可以与不与第一控制器相关联的数字转换器的通道相关联。第一控制器可以扫描与第一控制器相关联的每个信道处的信号，并且基于在与第一控制器相关联的给定信道处获取信号，计算信号的属性。第一控制器可以将计算的属性和给定信道的方向发送到第二控制器。第一控制器和第二控制器可以基于计算的属性以采集间隔扫描具有给定信道的方向的每个信道处的信号。

3. 发明授权

US11422663B1 Stylus sensing on touchscreens 有权
公开(公告)号：US11422663B1
公开(公告)日：2022-08-23
申请号：US17332357
申请日：2021-05-27
申请人： STMicroelectronics Asia Pacific Pte Ltd.
发明人： Kien Beng Tan , Eng Jye Ng , Hon Siong Ng , Tong Tee Tan
IPC分类号： G06F3/044 , G06F3/041
摘要： In an example, a method of sensing on a touchscreen including a plurality of touch sensors arranged in rows and columns on the touchscreen is described. The method includes detecting a passive touch on the touchscreen and a positon of an active stylus; determining a plurality of locations across the touchscreen corresponding to the passive touch and a positon of the active stylus, where each of the plurality of locations corresponds to a location of one of the plurality of touch sensors. The method includes transmitting a first uplink signal to a first group of the plurality of locations including a first fraction of the plurality of locations; and transmitting a second uplink signal to a second group of the plurality of locations including a second fraction of the plurality of locations, the first uplink signal being different from the second uplink signal.

4. 发明授权

US09696861B2 Touch rejection for communication between a touch screen device and an active stylus 有权
公开(公告)号：US09696861B2
公开(公告)日：2017-07-04
申请号：US14641717
申请日：2015-03-09
申请人： STMicroelectronics Asia Pacific Pte Ltd
发明人： Leonard Dinu , Eng Jye Ng , Kien Beng Tan
IPC分类号： G06F3/044 , G06F3/041
CPC分类号： G06F3/044 , G06F3/0416
摘要： A touch panel includes capacitive sensing electrodes and a touch controller operates in a first operating mode to detect a touch location on the touch panel. In a second operating mode, the touch controller transmits a modulated data signal through the touch panel to an active stylus. Each electrode is driven by a line driver circuit. A control circuit selectively actuates first ones of the line driver circuits to pass the modulated data signal to corresponding first ones of the electrodes which do not pass through a region of the touch panel associated with the location of the detected touch. Simultaneously, the control circuit selectively actuates second ones of the line driver circuits, different from said first ones of the line driver circuits, to ground corresponding second ones of the electrodes which do pass through the region of the touch panel associated with the location of the detected touch.

5. 发明授权

US11387676B2 Dual-mode high-efficiency voltage regulator for wireless charging modules 有权
公开(公告)号：US11387676B2
公开(公告)日：2022-07-12
申请号：US17007225
申请日：2020-08-31
申请人： STMicroelectronics Asia Pacific Pte Ltd
发明人： Eng Jye Ng , Chee Weng Cheong , Huiqiao He
IPC分类号： H02J50/10 , H02M1/36 , H02M1/00 , H02J7/02 , H02M1/08
摘要： A system comprising includes a wireless power receiver generating a rectified voltage. A low dropout regulator (LDO) generates a first regulated output voltage from the rectified voltage, during a first phase. A first switch couples the first regulated output voltage to a voltage output node during the first phase. During a second phase, the LDO generates a second regulated output voltage from the rectified voltage. A switching regulator generates a third regulated output voltage during the second phase. A second switch couples the third regulated output voltage to the voltage output node during the second phase. During a third phase, the LDO is disabled, while the switching regulator continues to generate the third regulated output voltage. The first switch opens during the third phase while the second switch remains closed.

6. 发明授权

US11165286B1 Adaptive baseline correction for delta amplification 有权
公开(公告)号：US11165286B1
公开(公告)日：2021-11-02
申请号：US16899990
申请日：2020-06-12
申请人： STMicroelectronics Asia Pacific Pte Ltd
发明人： Teerasak Lee , Chee Weng Cheong , Yannick Guedon , Eng Jye Ng
IPC分类号： H01F27/42 , H01F37/00 , H01F38/00 , H02J50/80 , H03F1/02 , H02J50/10 , H02J50/00
摘要： A data demodulating circuit includes a sensing circuit sensing a power signal applied to a coil at first and second times, and outputting an analog value representing a difference in voltage of the power signal at the first and second times. An analog-to-digital converter digitizes the analog value output by the analog voltage differential sensing circuit to produce a digital code. A compensation circuit, over a period of time, compares a present value of the digital code to a first value of the digital code during the period, and subtracts a given value from the present value of the digital code if the present value is greater than the first value but add the given value to the present value of the digital code if the present value is less than the first value. An accumulator accumulates output of the compensation circuit, and a filter filters output of the accumulator.

7. 发明申请

US20160266673A1 TOUCH REJECTION FOR COMMUNICATION BETWEEN A TOUCH SCREEN DEVICE AND AN ACTIVE STYLUS 有权
标题翻译：触控屏幕设备与主动式笔记本之间的通信触发阻止
公开(公告)号：US20160266673A1
公开(公告)日：2016-09-15
申请号：US14641717
申请日：2015-03-09
申请人： STMicroelectronics Asia Pacific Pte Ltd
发明人： Leonard Dinu , Eng Jye Ng , Kien Beng Tan
IPC分类号： G06F3/044 , G06F3/041 , G06F3/0354
CPC分类号： G06F3/044 , G06F3/0416
摘要： A touch panel includes capacitive sensing electrodes and a touch controller operates in a first operating mode to detect a touch location on the touch panel. In a second operating mode, the touch controller transmits a modulated data signal through the touch panel to an active stylus. Each electrode is driven by a line driver circuit. A control circuit selectively actuates first ones of the line driver circuits to pass the modulated data signal to corresponding first ones of the electrodes which do not pass through a region of the touch panel associated with the location of the detected touch. Simultaneously, the control circuit selectively actuates second ones of the line driver circuits, different from said first ones of the line driver circuits, to ground corresponding second ones of the electrodes which do pass through the region of the touch panel associated with the location of the detected touch.
摘要翻译：触摸面板包括电容感测电极，并且触摸控制器在第一操作模式下操作以检测触摸面板上的触摸位置。在第二操作模式中，触摸控制器通过触摸面板将经调制的数据信号发送到活动触针。每个电极由线路驱动电路驱动。控制电路选择性地致动线路驱动电路中的第一线路，以将经调制的数据信号传递到不通过与检测到的触摸的位置相关联的触摸面板的区域的对应的第一电极。同时，控制电路选择性地将不同于所述第一线路驱动器电路的线路驱动器电路中的第二线路驱动到接地的相应的第二电极，所述对应的第二电极通过与触摸面板的位置相关联的触摸面板的区域检测到触摸。

8. 发明授权

US10585528B2 Self-sensing touch panel 有权
公开(公告)号：US10585528B2
公开(公告)日：2020-03-10
申请号：US16014664
申请日：2018-06-21
申请人： STMicroelectronics Asia Pacific Pte Ltd
发明人： Hugo Gicquel , Eng Jye Ng
IPC分类号： G06F3/041 , G06F3/044
摘要： 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.

9. 发明申请

US20180059818A1 DISPLAY NOISE COMPENSATION IN TOUCH SCREEN DISPLAY USING CAPACITIVE DIVIDERS 审中-公开
公开(公告)号：US20180059818A1
公开(公告)日：2018-03-01
申请号：US15247106
申请日：2016-08-25
申请人： STMicroelectronics Asia Pacific Pte Ltd
发明人： Leonard Liviu Dinu , Chee Weng Cheong , Eng Jye Ng
IPC分类号： G06F3/044 , G06F3/041
CPC分类号： G06F3/044 , G06F3/0418
摘要： 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.

10. 发明申请

US20140117950A1 VOLTAGE REGULATOR CIRCUIT 审中-公开
标题翻译：电压调节器电路
公开(公告)号：US20140117950A1
公开(公告)日：2014-05-01
申请号：US13662612
申请日：2012-10-29
申请人： STMICROELECTRONICS ASIA PACIFIC PTE LTD
发明人： Eng Jye Ng , Kien Beng Tan
IPC分类号： G05F1/10
CPC分类号： G05F1/575
摘要： A voltage regulator circuit includes a differential amplifier stage. The gate terminal of a first n-channel MOSFET is coupled to an output of the differential amplifier stage. A resistor is coupled between the drain terminal and gate terminal of the first n-channel MOSFET. The drain terminal of the first n-channel MOSFET drives the gate of a second n-channel MOSFET whose drain terminal is at the input of a current mirror circuit. An output of the current mirror circuit forms the regulated voltage output. A feedback circuit is coupled between the regulated voltage output and one input of the voltage regulator circuit. Another input of the voltage regulator circuit is configured to receive a reference voltage.
摘要翻译：电压调节器电路包括差分放大器级。第一n沟道MOSFET的栅极端子耦合到差分放大器级的输出端。电阻器耦合在第一n沟道MOSFET的漏极端子和栅极端子之间。第一n沟道MOSFET的漏极端子驱动漏极端子处于电流镜电路的输入端的第二n沟道MOSFET的栅极。电流镜电路的输出形成稳压电压输出。反馈电路耦合在稳压电压输出和稳压电路的一个输入端之间。电压调节器电路的另一输入被配置为接收参考电压。

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