Patent application number | Description | Published |
20100300773 | HIGH SPEED MULTI-TOUCH TOUCH DEVICE AND CONTROLLER THEREFOR - A touch-sensitive device includes a touch panel, a drive unit, a sense unit, and a measurement unit. A touch applied to a node of the panel changes a capacitive coupling between two electrodes (a drive electrode and a sense electrode) of the touch panel. The drive unit delivers a drive signal, which may comprise one or more drive pulses, to the drive electrode. The sense unit couples to the sense electrode, and generates a response signal that includes a differentiated representation of the drive signal. The amplitude of the response signal is responsive to the capacitive coupling between the electrodes, and is measured to provide an indication of a touch at the node. | 12-02-2010 |
20110163992 | HIGH SPEED NOISE TOLERANT MULTI-TOUCH TOUCH DEVICE AND CONTROLLER THEREFOR - A touch-sensitive device includes a touch panel, a drive unit, a sense unit, and a measurement unit. A touch applied to a node of the panel changes a capacitive coupling between two electrodes (a drive electrode and a sense electrode) of the touch panel. The drive unit delivers a drive signal, which may comprise one or more drive pulses, to the drive electrode. The sense unit couples to the sense electrode, and generates a response signal that includes a differentiated representation of the drive signal, which is then fed through a resistor. The amplitude of the response signal is responsive to the capacitive coupling between the electrodes, and is measured to provide an indication of a touch at the node. | 07-07-2011 |
20110291986 | HIGH SPEED LOW POWER MULTI-TOUCH TOUCH DEVICE AND CONTROLLER THEREFOR - A touch-sensitive device includes a touch panel, a drive unit, a sense unit, and a measurement unit. A touch applied to a node of the panel changes a capacitive coupling between two electrodes (a drive electrode and a sense electrode) of the touch panel. The drive unit delivers a drive signal, which may comprise one or more drive pulses, to the drive electrode. The sense unit couples to the sense electrode, and generates a response signal that that is used to accumulate charge in a charge accumulator to provide an accumulated signal. The accumulated signal is responsive to the capacitive coupling between the electrodes, and is measured to provide an indication of a touch at the node. | 12-01-2011 |
20120062497 | TOUCH SENSITIVE DEVICE WITH STYLUS SUPPORT - A touch-sensitive device with stylus includes a touch panel, a stylus drive unit, a stylus sense unit, a touch panel drive unit, and a measurement unit. A touch by a stylus proximate to a touch panel electrode changes a capacitive coupling between the touch panel electrode and a stylus electrode. The amplitude of the response signal is responsive to the capacitive coupling between the touch panel electrode and the stylus electrode, and is measured to provide an indication of the position of the stylus electrode relative to the touch panel. | 03-15-2012 |
20120062498 | TOUCH SENSITIVE DEVICE WITH STYLUS SUPPORT - A touch-sensitive device with stylus includes a touch panel, a stylus drive unit, a touch panel sense unit, and a measurement unit. A touch by a stylus proximate to a touch panel electrode changes a capacitive coupling between the touch panel electrode and a stylus electrode. The amplitude of the response signal is responsive to the capacitive coupling between the touch panel electrode and the stylus electrode, and is measured to provide an indication of the position of the stylus electrode relative to the touch panel. | 03-15-2012 |
20120062499 | TOUCH SENSITIVE DEVICE WITH STYLUS SUPPORT - A touch-sensitive device with stylus includes a touch panel, a touch panel drive unit, a stylus sense unit, and a measurement unit. A touch by a stylus proximate to a touch panel electrode changes a capacitive coupling between the touch panel electrode and a stylus electrode. The amplitude of the response signal is responsive to the capacitive coupling between the touch panel electrode and the stylus electrode, and is measured to provide an indication of the position of the stylus electrode relative to the touch panel. | 03-15-2012 |
20120200506 | MODULAR CONNECTOR FOR TOUCH SENSITIVE DEVICE - Apparatus for providing modular connection means to electrodes in a touch-sensitive device. The modular connections may include electronics allowing controlling electronics to individually address electrodes associated with driving electrodes and sensing signals occurring on electrodes. | 08-09-2012 |
20140043278 | ELECTRODE CONFIGURATION FOR LARGE TOUCH SCREEN - A matrix-type mutual capacitive touch sensitive panel and associated touch sensing electronics, wherein the touch sensing electronics electrically couple to individual receive electrodes at a plurality of terminal areas on each individual receive electrode. | 02-13-2014 |
20140192490 | Modular Connector For Touch Sensitive Device - Apparatus for providing modular connection means to electrodes in a touch-sensitive device. The modular connections may include electronics allowing controlling electronics to individually address electrodes associated with driving electrodes and sensing signals occurring on electrodes. | 07-10-2014 |
20140267129 | CAPACITIVE-BASED TOUCH APPARATUS AND METHOD THEREFOR, WITH REDUCED INTERFERENCE - A touch-sensitive device that includes a touch surface circuit that facilitates a change in a coupling capacitance in response to a capacitance-altering touches occurring at the touch surface. The device includes a sense circuit that provides a signal, in response thereto, having transient portions for characterizing positive-going transitions towards an upper signal level and negative-going transitions towards a lower signal level. An amplification circuit is then used for amplifying and processing the signals, in response to the time-varying input parameters. The amplification circuit adjusts the gain for the transient portions relative to gain for portions of the response signals between the transient portions, and thereby suppresses RF interference, such as in the form of signal odd and/or even harmonics, to provide a noise filtered output for determining positions of capacitance-altering touches on the touch surface. | 09-18-2014 |