Patent application number | Description | Published |
20110037724 | SYNCHRONOUS TIMED ORTHOGONAL MEASUREMENT PATTERN FOR MULTI-TOUCH SENSING ON A TOUCHPAD - A method for detecting multiple objects on a touchpad having a grid of orthogonal electrodes, wherein all drive electrodes are simultaneously stimulated, and then frequency or electrode coding is used to separate each electrode junction and produce a capacitance image of the touchpad surface in a single measurement sequence. | 02-17-2011 |
20110063242 | Method and system for measuring position on surface capacitance touch panel using a flying capacitor - A touch panel having a substantially even coating of a conductive material on a non-conductive substrate and then covering the conductive material with a dielectric material, wherein a novel current measuring circuit reduces the effect of stray capacitance on the accuracy of a current measurement so that the relative X and Y position of an object on the touch panel can be determined using simple ratio equations. | 03-17-2011 |
20120113049 | SAMPLE AND HOLD ANALOG FRONT END FOR A CAPACITIVE TOUCHPAD - A massively parallel capacitive touchpad architecture that enables the taking of simultaneous measurements that can be used to mathematically divide out and cancel the effect of the noise in one axis by isolating the noise to only the electrodes under or near the fingers being detected by using a sample and hold circuit that provides advantages over existing measurement circuits. | 05-10-2012 |
20120133614 | LINEAR PROJECTED SINGLE-LAYER CAPACITANCE SENSOR - A touch sensor having a plurality of parallel drive electrodes that are being electrically driven, providing stimulus on one end or simultaneously on both ends, thus creating a linear or varying electric field across the length of the drive electrodes, wherein adjacent sensor electrodes are connected to a sense amplifier and analog-to-digital (ADC) converter to determine the position of an object that comes near to the drive and/or sense electrodes, wherein the system uses self-capacitance and measures the amount of current driven by each driver, wherein the system uses a mutual capacitance current divider in a first method by driving an electrode with a time varying voltage and measuring induced currents at each end of an adjacent sense electrode and using ratiometric equations to determine finger position, and using a mutual capacitance voltage divider in a second method. | 05-31-2012 |
20120280923 | SYSTEM FOR PROTECTING PIN DATA WHEN USING TOUCH CAPACITIVE TOUCH TECHNOLOGY ON A POINT-OF-SALE TERMINAL OR AN ENCRYPTING PIN PAD DEVICE - A system and method for providing security for a point-of-sale (POS) terminal or an encrypting PIN pad (EPP) by protecting the signals that could be directly probed on a touch sensor electrode grid or remotely probed such as through power supply signals or RF emissions, wherein the drive signals are randomly applied to drive electrodes in order to prevent tracking of drive signals, and charge is injected on sense lines to hide PIN data. | 11-08-2012 |
20120317410 | PROTECTING DATA FROM DATA LEAKAGE OR MISUSE WHILE SUPPORTING MULTIPLE CHANNELS AND PHYSICAL INTERFACES - A system and method for two devices that communicate via a network, wherein at least one of the devices is a touch sensitive device, the two devices storing a common cryptographic key that enables all communications via the network to be encrypted. | 12-13-2012 |
20130009895 | CANCELLING INDUCED CURRENTS IN A TOUCH SENSING DEVICE HAVING AN EMBEDDED NEAR FIELD COMMUNICATION ANTENNA - A method and system for enabling a near field communication antenna to be disposed adjacent to electrodes of a touch sensing device, the near field communication antenna being operated, and the magnetic field inductance and electric field coupling between the electrodes and the near field communication antenna being minimized in order to substantially reduce or eliminate induced currents on the electrodes. | 01-10-2013 |
20130162594 | METHOD FOR PREVENTING INTERFERENCE OF CONTACTLESS CARD READER AND TOUCH FUNCTIONS WHEN THEY ARE PHYSICALLY AND LOGICALLY BOUND TOGETHER FOR IMPROVED AUTHENTICATION SECURITY - A system for physically and logically integrating near field communication technology, touch sensor technology and display technology by using a more powerful near field communication antenna disposed under the touch sensor and display screen for transmitting, and a smaller near field communication antenna on top of the touch sensor for receiving near field communication signals. | 06-27-2013 |
20130201120 | BACKSCATTER STYLUS FOR USE WITH TOUCHSCREEN - A stylus touch sensor and an inexpensive, battery free, wireless backscatter stylus, the stylus touch sensor including a host radio frequency (RF) antenna for generating a magnetic field, an electrode grid for detecting finger touches, and a stylus reader circuit for detecting a signal from a backscatter stylus, and the backscatter stylus having a first circuit for using the magnetic field to generate an electrical current for powering the backscatter stylus, and a second circuit for generating a backscatter signal that is detectable by the stylus reader circuit. | 08-08-2013 |
20130201147 | HIGH RESOLUTION NON-GHOSTED GESTURES - A method of performing a two-finger gesture when the absolute position of the fingers does not need to be known in order to perform the gesture, wherein de-ghosting of results from a touch sensor that gives a false position and a real position for each actual finger on the touch sensor is performed by finding a strongest signal when performing a short aperture measurement from one side of the touch sensor so that the direction of a rotation gesture can be determined, and wherein flick and pinch gestures can all be calculated using de-ghosted weighted average and weighted absolute deviation calculations. | 08-08-2013 |
20130201148 | TWO-FINGER GESTURE ON A LINEAR SENSOR OR SINGLE LAYER SENSOR - A linear sensor (a single electrode) or a single layer sensor (a plurality of parallel and planar electrodes) that may be used in a single layer sensor, wherein a pinching gesture by two fingers can be detected on the linear or single layer sensors by measuring and then integrating current to determine if a finger is moving away from or towards an edge of the sensor, or it can be determined if the distance between the fingers is changing. | 08-08-2013 |
20130285797 | SAVING POWER IN A BATTERY POWERED SYSTEM HAVING A TOUCH SENSOR AND AN RFID TAG READER - A system and method that combines RFID tag reader circuitry and a touch sensor, wherein the system and method may reduce power consumption of a battery powered system by detecting the presence of an RFID tag by using a lower power consumption touch sensor instead of scanning for the RFID tag by using higher power RFID tag detection and reading circuitry, controlling activation and deactivation of the RFID tag detection and reading circuitry when the touch sensor has detected the presence of the RFID tag, and reconfiguring sensor electrodes so that the electrodes may form a touch sensor or an antenna as needed. | 10-31-2013 |
20140055389 | REDUCING THE NUMBER OF SIGNALS NEEDED FOR OPERATING A TOUCH SENSITIVE DEVICE - A system and method for reducing the number of transmit and receive signals that are necessary to operate a touch sensitive device having a sensing area comprised of an orthogonal electrode grid, a controller chip being capable of grouping together various electrodes when driving and reading signals from the touch sensitive device, or using the same number of drive pins and sense inputs to operate a much larger touch sensitive device. | 02-27-2014 |
20140168156 | FAIL SAFE DESIGN FOR A STYLUS THAT IS USED WITH A TOUCH SENSOR - A system and method for enabling a stylus to be used with a touch sensor even after it has failed in an open mode or a closed mode, wherein the tethered stylus activates the inking function when the stylus is in contact with the touch sensor and deactivates the inking function when the stylus is lifted off the surface of the touch sensor when the switch is functioning properly, but when there is a failure of the switch in the open mode or the closed mode, enabling the tethered stylus to continue functioning by using a timer to activate the inking function when the tethered stylus is close enough to be detected by a touch sensor, and to deactivate the inking function when the tethered stylus is no longer detectable by the touch sensor. | 06-19-2014 |
20140191031 | METHOD FOR PREVENTING UNINTENDED CONTACTLESS INTERACTION WHEN PERFORMING CONTACT INTERACTION - A system and method for enabling a dual interface smart card reader to be able to determine if data should be read from a smart card using wireless technology or touch technology, even when the data can be accessed through wireless technology. | 07-10-2014 |
20140195429 | METHOD FOR PROTECTING CARDHOLDER DATA IN A MOBILE DEVICE THAT PERFORMS SECURE PAYMENT TRANSACTIONS AND WHICH ENABLES THE MOBILE DEVICE TO FUNCTION AS A SECURE PAYMENT TERMINAL - A system and method system and method for enabling a portable electronic appliance such as a mobile telephone or tablet computer to be able to function as a device that may store account information in order to make a secure payment, or to be able to use the portable electronic appliance as a secure payment terminal so that a credit card holder may use it to make a secure payment. | 07-10-2014 |
20140240283 | PROTECTING PHYSICAL SIGNAL PATHS USING CAPACITIVE SENSING TECHNIQUES - A system and method for detecting the presence of a probe on or near an electrode that may transmit secure data by detecting a change in capacitance on the electrode, and wherein action may be taken to stop transmission on the electrode if a probe is detected. | 08-28-2014 |
20140240284 | SYSTEM FOR USING SYNCHRONIZED TIMED ORTHOGONAL MEASUREMENT PATTERNS TO ENABLE HIGH UPDATE REPORT RATES ON A LARGE CAPACITIVE TOUCH SCREEN - A system and method for increasing a report rate on a capacitive touch sensor to thereby provide a real-time display of the position of all the objects on a touch screen that is using synchronized timed orthogonal measurement stimulus patterns to determine the position of objects on the touch sensor, by updating an image of the reported positions of objects on the touch sensor each time that a measurement is taken on each of the sensor electrodes instead of waiting for a complete scan of all the sensor electrodes in a sensor electrode array. | 08-28-2014 |
20140253505 | SYSTEM FOR PROTECTING PIN DATA WHEN USING TOUCH CAPACITIVE TOUCH TECHNOLOGY ON A POINT-OF-SALE TERMINAL OR AN ENCRYPTING PIN PAD DEVICE - A system and method for providing security for a point-of-sale (POS) terminal or an encrypting PIN pad (EPP) by protecting the signals that could be directly probed on a touch sensor electrode grid or remotely probed such as through power supply signals or RF emissions, wherein the drive signals are randomly applied to drive electrodes in order to prevent tracking of drive signals, and charge is injected on sense lines to hide PIN data. | 09-11-2014 |