-
公开(公告)号：US20200019269A1
公开(公告)日：2020-01-16
申请号：US16033730
申请日：2018-07-12
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Aiden JEON , Kai LIM
Abstract: Disclosed herein is a touch screen controller including input circuitry operating a touch screen, and processing circuitry cooperating with the input circuitry to acquire mutual touch data and self touch data from the touch screen, sum values of the mutual touch data to produce mutual sums, normalize the mutual sums and the self touch data, and calculate differences between the normalized self touch data and the normalized mutual sums. The touch screen controller enters into a floating mode if a largest difference that is positive is greater than a positive difference threshold and if a smallest difference value that is negative is less than a negative difference threshold, but enters a non-floating mode if the largest difference that is positive is less than the positive difference threshold or if the smallest difference value that is negative is less than the negative difference threshold.
-
公开(公告)号：US10416802B2
公开(公告)日：2019-09-17
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
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.
-
373.发明申请公开(公告)号：US20190265837A1
公开(公告)日：2019-08-29
申请号：US16406205
申请日：2019-05-08
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Kusuma Adi NINGRAT , Ade PUTRA
Abstract: A touch screen controller includes drive circuitry driving force lines with a force signal in a touch data sensing mode and not driving the force lines in a noise sensing mode, sense circuitry sensing touch data at the sense lines in the touch data sensing mode and sensing noise data at the sense lines during the noise sensing mode. Processing circuitry: a) samples the noise data, b) performs trigonometric manipulations of the noise data to produce imaginary noise data and real noise data, and c) determines a noise magnitude value of the noise data as a function of the imaginary noise data and the real noise data. In the noise sensing mode, (a)-(c) are performed for each of a plurality of possible sampling frequencies to be used in the touch data sensing mode in order to determine which sampling frequency is to be used in the touch data sensing mode.
-
公开(公告)号：US20190087035A1
公开(公告)日：2019-03-21
申请号：US16130332
申请日：2018-09-13
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Abe Yun , Aiden Jeon , Glen Kang
Abstract: Disclosed herein is a method of operating a touch screen controller in a device with a touch screen having force lines and sense lines. The method includes receiving touch data from the touch screen, and operating the touch screen in a self capacitance sensing mode. In the self capacitance sensing mode, which force lines have strength values indicating a potential touch to the touch screen are determined. The method also includes operating the touch screen in a mutual capacitance sensing mode, and in the mutual capacitance sensing mode, performing mutual capacitance sensing on only a subset of the force lines, with the subset of the force lines including at least those force lines indicating the potential touch to the touch screen.
-
公开(公告)号：US20190064999A1
公开(公告)日：2019-02-28
申请号：US16058150
申请日：2018-08-08
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Tae-gil Kang , Jay Wang
Abstract: A capacitive panel is scanned with an AC signal having pulses at a first frequency to produce a first frame of mutual capacitance data and pulses at a second frequency, different from the first frequency, to produce a second frame of mutual capacitance data. If neither the first nor second frames of mutual capacitance data is perturbed by noise, then data of the first and second frames of mutual capacitance data is averaged. The averaged data is then used in centroid processing.
-
Patent Agency Ranking
公开(公告)号：US10209844B2
公开(公告)日：2019-02-19
申请号：US15995340
申请日：2018-06-01
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Yannick Guedon , Sze-Kwang Tan , Dianbo Guo
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.
-
公开(公告)号：US10191589B2
公开(公告)日：2019-01-29
申请号：US15235974
申请日：2016-08-12
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Hugo Gicquel , Chee Weng Cheong
Abstract: A circuit described herein includes a charge to voltage converter circuit having an input coupled to receive a sense signal from a sense node associated with a mutual capacitance to be sensed, and an output. A reset switch is coupled between the output of the charge to voltage converter circuit and the input of the charge to voltage converter. An accumulator circuit is configured to accumulate voltages at the output of the charge to voltage converter circuit and to generate an accumulator output signal. Control circuitry is configured to generate control signals for the reset switch and accumulator circuit so as to reduce noise in the accumulator output signal.
-
公开(公告)号：US10146363B2
公开(公告)日：2018-12-04
申请号：US15234243
申请日：2016-08-11
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Abhishek Singh , Hugo Gicquel
Abstract: An alternating current (AC) drive signal having a first frequency and a high logic level at a boosted supply voltage is applied to drive a capacitive sensing line of a capacitive touch panel. The boosted supply voltage is generated by boosting an input voltage. The voltage boosting is effectuate by a charge pump circuit operating synchronous to assertion of the AC drive signal with a charge transfer time that is adaptable to different capacitive load conditions.
-
379.发明申请公开(公告)号：US20180341362A1
公开(公告)日：2018-11-29
申请号：US16057062
申请日：2018-08-07
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Abhishek Singh , Hugo Gicquel
CPC classification number: G06F3/0416 , G06F3/044 , H02M3/07
Abstract: An alternating current (AC) drive signal having a first frequency and a high logic level at a boosted supply voltage is applied to drive a capacitive sensing line of a capacitive touch panel. The boosted supply voltage is generated by boosting an input voltage. The voltage boosting is effectuate by a charge pump circuit operating synchronous to assertion of the AC drive signal with a charge transfer time that is adaptable to different capacitive load conditions.
-
公开(公告)号：US10120514B2
公开(公告)日：2018-11-06
申请号：US15191714
申请日：2016-06-24
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Kusuma Adi Ningrat , Giuseppe Noviello , John Serge Georges Nankoo
IPC: G06F3/044
Abstract: An electronic device includes a flexible substrate. The flexible substrate includes a first portion having a plurality of first conductive lines formed thereon, a second portion having a plurality of second conductive lines formed thereon, and an intermediate portion mechanically coupling the first portion to the second portion. The intermediate portion is configured to permit folding so that the first and second portions can be arranged back-to-back or face-to-face such that plurality of the second conductive lines and plurality of first conductive lines are oriented so as to cross one another to thereby form a capacitive sensing panel. A single connector is mechanically coupled to the first portion or the second portion, and electrically coupled to the first portion and the second portion but not electrically coupling the first portion to the second portion.
-
-
-
-
-
-
-
-
-
Search Results
426
records
(took 0.04 seconds)
