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公开(公告)号：US10152161B2
公开(公告)日：2018-12-11
申请号：US14736317
申请日：2015-06-11
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Leonard Dinu
Abstract: A touch screen controller is for a drive line emitting a periodic signal and capacitively intersecting sense lines. A selection circuit, for each of a number of portions of the periodic signal equal to a number of the sense lines, couples a first subset of the sense lines to a first output path, and couples a second subset of the sense lines to a second output path, the second subset being sense lines not included in the first subset. Processing circuitry, for each portion of the periodic signal, measures a capacitance of the first output path, measures a capacitance of the second output path, and sums the capacitance of the first output path and the capacitance of the second output path. The processing circuitry determines a capacitance between each sense line of the first and second subsets and the drive line as a function of the sums.
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32.发明申请公开(公告)号：US20180329540A1
公开(公告)日：2018-11-15
申请号：US16042055
申请日：2018-07-23
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Kien Beng Tan
CPC classification number: G06F3/044 , G06F3/0416
Abstract: A capacitive sensing system includes a capacitive sensing panel with drive lines and sense lines. Each drive line includes a drive circuit. A code generator operates to generate modulation codes. A drive controller generates drive signals wherein each drive signal is modulated by one of the modulation codes. The generated drive signals are applied to the drive lines through the drive circuits. The drive controller operates to simultaneously generate the drive signals for application to a corresponding group of drive lines during a drive period. Separate groups of drive lines are sequentially driven with the same drive signals during drive periods that only partially overlap.
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公开(公告)号：US20180294722A1
公开(公告)日：2018-10-11
申请号：US16004253
申请日：2018-06-08
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Kong Yin LEONG
CPC classification number: H02M3/158 , H02M1/088 , H02M3/156 , H02M2001/0009 , H02M2001/0019
Abstract: The amount of power being output to the load is sensed by sampling the frequency of the pulse width modulation signal that is controlling the switch that is providing the power to the load. If the pulse width modulation signal has a high frequency, then it will be providing higher power to the load. As the power drawn by the load decreases, the frequency of the pulse width modulation power supply signal will decrease. By sensing and periodically sampling the frequency of the pulse width modulation signal that is providing power, the demand of the load can be quickly and accurately determined. As the power demand of the load decreases, the peak current that the power supply switch can provide also decreases. The permitted peak current dynamically changes to adapt to the power drawn by the load.
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公开(公告)号：US10043251B2
公开(公告)日：2018-08-07
申请号：US14969255
申请日：2015-12-15
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Yong Huang , Lucas Hui
IPC: G06T5/00 , G06T5/20 , G09G5/02 , G09G5/10 , H04N5/20 , H04N5/202 , H04N5/57 , H04N5/76 , H04N9/68 , H04N9/77 , H04N11/24 , H04N5/14
Abstract: Various embodiments provide tone mapping of images and video from one dynamic range to an available dynamic range of a display device while preserving or enhancing image details. According to one embodiment, an enhanced tone mapping module is configured to decrease a luminance of an image or video from a high dynamic range to a standard dynamic range. Conversely, according to one embodiment, an enhanced inverse tone mapper to increase a luminance of an image or video from a standard dynamic range to a high dynamic range.
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公开(公告)号：US10031620B2
公开(公告)日：2018-07-24
申请号：US15199792
申请日：2016-06-30
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Hugo Gicquel , EngJye Ng
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：US09971421B2
公开(公告)日：2018-05-15
申请号：US14199210
申请日：2014-03-06
Applicant: STMICROELECTRONICS ASIA PACIFIC PTE LTD
Inventor： Chee Weng Cheong , Leonard Liviu Dinu , Dianbo Guo , Kien Beng Tan
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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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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