Patent application number | Description | Published |
20100321336 | TOUCH INPUT DEVICE AND TOUCH SENSOR CIRCUIT - The invention discloses a touch input device and a touch sensor circuit. The touch input device includes a touch panel, a selection module and a differential detection module. The touch panel includes a plurality of capacitive nodes thereon. The selection module is electrically connected with the capacitive nodes of the touch panel. The selection module selects a first capacitive node and a second capacitive node from the capacitive nodes. The second capacitive node is close to the first capacitive node. The differential detection module, electrically connected to the selection module, is used for detecting a capacitance difference between the first capacitive node and the second capacitive node. According to the capacitance difference, the differential detection module generates a touch detection signal. | 12-23-2010 |
20110063249 | TOUCH SENSING APPARATUS AND TOUCH SENSING METHOD - A touch sensing apparatus applied to a capacitance touch panel includes a sensing module, a signal generating module, a comparing module, and a processing module. When a first and a second touch point formed on the capacitance touch panel correspond to two first and second touch pad sets, the sensing module generates a request signal. The signal generating module respectively outputs two test signals with reverse phases to the two first touch pad sets according to the request signal. After the comparing module generates a compared result according to two voltage values corresponding to the two second touch pad sets, the processing module will determine the positions of the first and the second touch point according to the compared result. When touch points are more than two, the touch sensing apparatus repeats the above-mentioned steps until all positions of the touch points are defined and the ghost points are removed. | 03-17-2011 |
20120038574 | DETECTION METHOD AND DETECTION CIRCUIT FOR DETECTING TOUCH EVENT ON TOUCH PANEL BY SELECTING NON-ADJACENT SENSING AXIS AS REFERENCE AXIS - A detection method for detecting a touch event on a touch panel includes a plurality of first sensing axes on a first dimension, and a plurality of second sensing axes on a second dimension. The detection method includes: regarding each first sensing axis, choosing another first sensing not neighboring with the first sensing axis as a first reference axis, and utilizing the first sensing axis and the first reference axis to derive a first sensing data corresponding to the first sensing axis; utilizing the second axes to derive a second sensing data corresponding to each second sensing axis; and utilizing first sensing data respectively corresponding to the first sensing axes and second sensing data respectively corresponding to the second sensing axes to derive a touch event detection result. | 02-16-2012 |
20120075219 | DETECTION METHOD AND DETECTING APPARATUS FOR DETECTING MULTIPLE TOUCH POINTS ON TOUCH PANEL - A detection method for detecting a plurality of contacts on a touch panel includes: generating a preliminary sensing data according to the contacts on the touch panel; determining a plurality of first specific sensing axes included in a plurality of first sensing axes and a plurality of f second specific sensing axes included in a plurality of second sensing axes according to the preliminary sensing data; utilizing a configuration circuit to configure a driving and receiving sequence of the plurality of first sensing axes and the plurality of second sensing axes for obtaining a first sensing data and a second sensing data; and utilizing a determining circuit to receive a completion instruction, wherein when the determining circuit receives the completion instruction, the determining circuit determines a touch detection result according to the first sensing data and the second sensing data. | 03-29-2012 |
20120098775 | DETECTION METHOD AND DETECTION DEVICE FOR DETECTING MULTIPLE CONTACTS ON TOUCH PANEL ACCORDING PRELIMINARY SENSING DATA - A detection method for detecting a plurality of contacts on a touch panel which includes a plurality of first sensing axes on a first dimension and a plurality of second sensing axes on a second dimension includes: generating a preliminary sensing data according to the contacts on the touch panel; determining at least one specific sensing axis included in the plurality of first sensing axes according to the preliminary sensing data; utilizing a configuration circuit to configure a driving and receiving sequence of the plurality of first sensing axes and the plurality of second sensing axes for obtaining a sensing output; and utilizing a determining circuit to receive a completion instruction. | 04-26-2012 |
20120249457 | UNGROUNDED TOUCH-SENSING INPUT DEVICE AND CONTROL DEVICE THEREOF - A control device of an ungrounded touch-sensing panel is disclosed. The touch-sensing panel includes a plurality of first-directional lines and a plurality of second-directional lines arranged intersecting one another. The control device includes a selection circuit, at least one capacitor, a driving signal generation circuit, an analog to digital conversion module and a signal processing unit. The selection circuit is configured to select at least one scan line and at least one sense line from the first-directional lines and the second-directional lines during each scanning operation. After the new scan line and sense line are generated, each capacitor is coupled between each scan line and each sense line selected by the selection circuit to increase a total capacitance between the scan line and the sense line. | 10-04-2012 |
20130033441 | TOUCH INPUT DEVICE FOR SWITCHING DRIVING SIGNALS - A touch input device for switching driving signals includes a touch panel and a panel driving circuit for driving the touch panel. The panel driving circuit includes a selecting circuit, a driving signal generating circuit, and a touch sensing circuit. The driving signal generating circuit transmits a driving signal to the touch panel. The selecting circuit includes a multiplexer, which controls sensing lines that do not comprise either an X directional measuring channel or a Y directional measuring channel to be grounded or floating in accordance with the driving signal. | 02-07-2013 |
20130271398 | METHOD OF CONTROLLING NOISE PROCESSING CIRCUIT OF TOUCH PANEL AND RELATED NOISE PROCESSING APPARATUS - The present invention provides a method of controlling a noise processing circuit of a touch panel and a related noise signal processing apparatus. At first, the present invention detects whether the touch panel is interfered with by noise. Then, according to whether the noise interferes with the touch panel, the noise processing circuit is controlled to be activated or not activated. Therefore, the noise processing circuit can be turned off if it is unnecessary, thereby to reduce the workload due to the noise processing. | 10-17-2013 |