Abstract: The invention, upon receiving an input signal, sums the absolute values of the difference of each pair of values adjacent to each other within a series of detected signal values to suppress the interference of low-frequency noise. Furthermore, the invention sums the absolute values of the moving averages of the differences of each pair of values adjacent to each other within a series of detected signal values to suppress both the interference of low-frequency noise and the interference of high-frequency noise. No synchronization with the input signal is necessary. The detection can be started at any phase of the input signal.

Abstract: The present invention provides a calibration method of a touch screen which comprises a display module and a sensor module. The calibration method comprises the following steps: receiving coordinate values of multiple display points shown on the display module; receiving coordinate values of multiple sensing points received by the sensor module, wherein the multiple sensing points are corresponding to the multiple display points, respectively, for forming at least four multiple correspondences; calculating a first set of calibration formulas according to the multiple correspondences; adjusting the multiple sensing points according to the first set of calibration formulas; and calculating a second set of calibration formulas according to the adjusted sensing points.

Abstract: A touch sensing circuit is provided. The circuit is configured to connect to a conducting wire in a touch area for measuring a signal variation. In a driving mode, the wire is coupled to AC voltage. If a first voltage variation which exceeds a first threshold is measured by the circuit, it is determined that something is approaching the touch area near the wire. In a passive mode, the wire is coupled to DC voltage. If a second voltage variation which exceeds a second threshold is measured by the circuit, it is determined that something is approaching the touch area near the wire. When measuring the second voltage variation, no AC voltage is coupled to the wire.

Abstract: The invention discloses a system and method for communication through touch screens that uses a first touch screen and a second touch screen for communication to form a communication system. The first and the second touch screens have a detecting mode for detecting an approach or touch of an external conductive object. In addition, the first and the second touch screens have a communication mode in which capacitively coupled communications between the first and the second touch screens are performed in order to exchange or communicate a message.

Abstract: A touch processor is provided by the present application. The touch processor detects the intensity of a third electrical signal, wherein a touch device induces a second electrical signal due to a first electrical signal, and the third electrical signal of the second electrical signal is transmitted from the touch device to an approached or touched object. Then, according to the intensity of the second electrical signal and the third electrical signal, the touch processor determines if there is a transmitter hovering on the touch device or not.

Abstract: The invention provides a touch sensing method. The touch sensing method comprises the following steps: determining that a 1D sensing information comprises a first line piece if at least one value of the first line piece is higher than a preset range, or all values of the first line piece are within the preset range, wherein the 1D sensing information comprises a plurality of values, and the first line piece comprises part of the values.

Abstract: The present application provides a method for determining mistaken approaching/touching event, comprising: gathering one or more touch sensitive signal value corresponding to a line piece; calculating a sum of differences of each signal value and a baseline value; and if the sum is less than or equals to zero, determining the line piece is corresponding to a mistaken approaching/touching event.

Abstract: The invention provides a touch sensing method. The touch sensing method comprises the following steps: searching each line piece of a line piece group in a 1-D sensing information which comprising a plurality of values, and each line piece comprises part of the values; keeping a first line piece in the line piece group if at least one value of the first line piece of all line pieces is higher than a preset range; and excluding a second line piece from the line piece group if at least one value of the second line piece of all line pieces is lower than the preset range.

Abstract: The present invention provides a method and device for position detection. For detection of a touch position, a segment of surface acoustic wave (SAW) is provided multiple times to be propagated on a SAW touch panel, and the multiple SAW segments are received by the SAW touch panel. In addition, during or after reception, partial output electrical signals are provided based on different portions of each received SAW segment to construct a complete output electrical signal.

Abstract: An active stylus without function keys is disclosed to include a pen body defining therein an accommodation chamber, a control device mounted inside the accommodation chamber and including a circuit board capable of outputting a signal to a touch control device of a touch screen being touched by the active stylus and two first conductors electrically connected to the circuit board, and a rotating barrel rotatably mounted on the pen body around the control device, the rotating barrel including a second conductor movable with the rotating barrel relative to the pen body into contact with either or both of the two first conductors or away from the first conductors to provide one of a series of signals for driving circuit board to output a corresponding control signal to the touch control device of the touch screen.

Abstract: The method and the device for position detection with palm rejection are disclosed. The invention provides a sensor and a controller for controlling the sensor. The sensor includes a plurality of strips. The controller execute a first kind of position detection and a second kind of position detection on the sensor. The first kind of position detection identifies an ignored zone, and the second kind of position detection executes the position detection outside the ignored zone.

Abstract: A touch sensing device and 2D sensing information update method used therein is disclosed. Before updating the 2D sensing information for use as a reference 2D sensing information, the processor determines the touch sensing panel is under an abnormal condition if any flatness index is smaller than a predetermined flatness index negative reference value or larger than a predetermined flatness index positive reference value, and will then keep measuring the capacitive coupling amount at each sensing point and getting respective flatness indexes, and will then update the 2D sensing information for use as a reference 2D sensing information when all the flatness indexes are in the range between the predetermined flatness index negative reference value and the predetermined flatness index positive reference value.

Abstract: A mutual capacitance touch sensing device inspection method is performed by: measuring the capacitive coupling amounts of all the crossover points between driving lines and sensing lines of the touch sensing panel, and then integrating the measured capacitive coupling amounts and the respective crossover point coordinate data into respective 2-D sensing information for creating local 2-D sensing information by integrating each predetermined number of adjacent crossover points and the respective capacitive coupling amounts so that the processor can get respective flatness indexes and integrate the flatness indexes and the respective coordinate data of the local 2-D sensing information into a flatness index information for determine the touch sensing panel to be a qualified, defective-acceptable or defective product.

Abstract: The present disclosure relates to a touch control device and touch determination method thereof. When a processor determines a capacitive coupling variation of a sensing point at a sensing panel of the touch sensitive device is smaller than a predetermined negative threshold or larger than a predetermined positive threshold, the processor then computes from local 2D sensing information of second 2D sensing information measured at the sensing point, to obtain a flatness index, The processor determine that the sensing point is not touched by any external object if the flatness index is between a predetermined flatness index negative reference value and a predetermined flatness index positive reference value that indicates the capacitive coupling amount at the sensing point is changed by the sensing point is not touched by any external object, whereby a false touch control determination due to removing water drop on the touch sensing panel can be prevented.

Abstract: A transmitter is provided by the present application. The transmitter comprises a first element, configured to receive signal with a first frequency group, wherein first impedance value of the first element is changed according to a force, a second element with a second frequency group, and a tip section, configured to receive outputs of the first and the second elements and to transmit an electric signal, wherein the tip section is used to receive the force.

Abstract: The present invention provides a method for detecting touch trace while preventing interruption of the touch traces in the presence of interfering noise, comprising: changing frequency of driving signals in response to a detection of noise; setting a plurality of lines of first sensing signal values obtained from a first sensing as a plurality of baselines; obtaining a plurality of difference values by comparing a plurality of lines of second sensing signal values obtained from a second sensing against said plurality of baselines; determining whether all said plurality of difference values are smaller than a threshold value; determining whether the flatness of said plurality of baselines is greater than a flatness threshold value if all said plurality of difference values are determined to be smaller than said threshold value; and reporting, in response to the flatness of said plurality of baselines is determined to be greater than said flatness threshold value, a first proximity or touch event, said first pr

Abstract: The present invention provides a method and device for position detection. For detection of a touch position, a segment of surface acoustic wave (SAW) is provided multiple times to be propagated on a SAW touch panel, and the multiple SAW segments are received by the SAW touch panel. In addition, during or after reception, partial output electrical signals are provided based on different portions of each received SAW segment to construct a complete output electrical signal.

Abstract: A method is provided for detecting a transmitter approaching or touching a touch sensitive display. The transmitter transmits an electrical signal which is mixed from a plurality of signals having different frequencies. The display includes a liquid crystal layer between pixel electrodes and common electrodes and a plurality of second electrodes. The common electrodes include a plurality of first electrodes. A plurality of sensing points is located in the intersections of the plurality of first electrodes and the plurality of second electrodes. The method includes: calculating the total signal strength of a received signal with respect to each of the first electrodes; calculating the total signal strength of a received signal with respect to each of the second electrodes; calculating a relative position between the transmitter and the display according to the calculated total signal strengths of the received signals with respect to each of the first and second electrodes.

Abstract: When a touch sensor is approached or touched by a capacitive pen in a small area, the corresponding approach or touch signal might be slightly less than the threshold originally used for normal detection. By comparing the sum of the corresponding approach or touch signal and some adjacent signals with the threshold, the approach or touch of a small-area object that otherwise would not be detected by the original method can be determined. The capacitive pen can be made of bonded conductive fibers.

Abstract: The present invention provides a method and device for position detection. For detection of a touch position, a segment of surface acoustic wave (SAW) is provided multiple times to be propagated on a SAW touch panel, and the multiple SAW segments are received by the SAW touch panel. In addition, during or after reception, partial output electrical signals are provided based on different portions of each received SAW segment to construct a complete output electrical signal.