Abstract: A touch panel includes a plurality of X-directional sensing lines and a plurality of Y-directional sensing lines. The X-directional sensing lines and the Y-directional sensing lines are arranged in a staggered manner, and a plurality of mutual capacitors are formed between every X-directional sensing line and every Y-directional sensing line. According to one embodiment of the present invention, the scanning method first selects the number of sensing lines to be measured to determine a measurement channel. Driving signals are applied to other sensing lines excluding the measurement channel in scanning procedures. After the driving signals are applied, two voltages at nodes of the measurement channel are detected to obtain a touch position on the touch panel.

Abstract: A touch input device is disclosed in this invention. The touch input device includes a touch panel, a selection module and a detection module. The touch panel includes capacitive nodes thereon. The selection module is electrically connected to the capacitive nodes of the touch panel. The selection module is used for selecting at least one capacitive node from the capacitive nodes respectively, in order to form a first capacitive node class and a second capacitive node class which is adjacent to the first capacitive node class. The detection module includes a signal generator for generating a detective pulse signal and a reversal pulse signal with a phase opposite to the detective pulse signal. The detective pulse signal and the reversal pulse signal are respectively imported to the first capacitive node class and the second capacitive node class through the selection module.

Abstract: An touch input electronic device includes: a touch input device; a clock generation circuit, generating a first clock and a second clock; a touch sensing circuit, coupled to the touch input device, the touch sensing circuit operated under the first clock; a logic circuit, receiving a sensing output signal from the touch sensing circuit, the logic circuit operated under the second clock; and a conversion circuit, outputting an output voltage under control of the logic circuit, the output voltage coupled to the touch sensing circuit, the conversion circuit operated under the second clock. In response to the sensing output signal from the touch sensing circuit, the logic circuit controls the conversion circuit to adjust the output voltage to detect a capacitance variance of the touch input device.

Abstract: An electronic device includes: a touch input device, a touch sensing circuit coupled to the touch input device and a capacitance offset compensation circuit. The capacitance offset compensation circuit includes: a first offset compensation capacitance array, coupled to a reference voltage or a driving signal in response to a control signal from the touch sensing circuit, coupled to one of a first coupling voltage and a second coupling voltage from the touch input device in response to the control signal. The first offset compensation capacitance array adjusts an output equivalent capacitance in response to the control signal, for compensating at least one of a GND parasitic capacitance and a cross coupling capacitance of the touch input device.

Abstract: A capacitance measurement circuit includes: a reference capacitor selectively coupled to a first reference voltage or a second reference voltage; a sensor capacitor selectively coupled to the first reference voltage or the second reference voltage; an operation amplifier coupled to the reference capacitor, the sensor capacitor and a third reference voltage; an approximation unit coupled to the operation amplifier; and a conversion unit coupled to the operation amplifier and the approximation unit. The reference capacitor and the sensor capacitor respectively couple a first charge amount and a second charge amount to a first input terminal of the operational amplifier to conduct an input voltage. The conversion unit couples a third charge amount to the first input terminal of the operation amplifier or charges/discharges the first input terminal of the operation amplifier until the input voltage approximates the third reference voltage.

Abstract: A capacitance measurement circuit includes an operation amplifier; a reference capacitor having a first terminal coupled to a first input terminal of the operation amplifier and a second terminal selectively coupled to a first or second reference voltage; a sensor capacitor having a first terminal coupled to a second input terminal of the operation amplifier and a second terminal selectively coupled to the first or second reference voltage; an approximation unit having an output terminal and an input terminal coupled to an output terminal of the operation amplifier; a conversion unit having an output terminal and an input terminal coupled to the output terminal of the approximation unit; and a coupling capacitor having a first terminal coupled to the first or second input terminal of the operation amplifier and a second terminal coupled to the output terminal of the conversion unit.

Abstract: 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.

Abstract: The invention discloses a touch sensing circuit applied to a capacitance touch panel for detecting the position of a sensed object touching the capacitance touch panel. The touch sensing circuit includes a first signal supplying module, a second signal supplying module, a first measurement module, a second measurement module and a processing module. The first signal supplying module inputs signals in turn to first sensing lines arranging along the first direction. The second signal supplying module inputs signals in turn to second sensing lines arranging along the second direction. The first measurement module and the second measurement module are used for measuring the first equivalent capacitances of the first sensing lines and that of the second sensing lines. The processing module is coupled to first measurement module and the second measurement module for determining the position of the sensed object.

Abstract: 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.

Abstract: A TFT-LCD capable of repairing discontinuous lines includes a repairing circuit, which includes a plurality of repairing OP amplifiers and a high-impedance detecting unit. The high-impedance detecting unit detects states of input terminals of the OP amplifiers. The high-impedance detecting unit enables a control signal to enable the OP amplifier when the input terminal is not at floating state. The high-impedance detecting unit disables the control signal to disable the OP amplifier when the input terminal is at floating state, so that no output competition between the OP amplifiers is generated.

Abstract: Disclosed is a timing generator of panel display and polarity arrangement control signal generation method therefor. The timing generator comprises a storage unit for storing a plurality of sets of polarity data and corresponding PAC signals, an operation unit for receiving display data, the sets of polarity data, and a corresponding PAC signal so that the operation unit can perform an inner product operation with respect to the polarity data and the display data for obtaining a sum of coupling voltages, and a comparison unit for comparing the sum of coupling voltages with a predetermined value, and outputting the PAC signal corresponding to the polarity data to a data driver if the sum of coupling voltages is smaller than the predetermined value.

Abstract: A TFT-LCD capable of repairing discontinuous lines includes a repairing circuit, which includes a plurality of repairing OP amplifiers and a high-impedance detecting unit. The high-impedance detecting unit detects states of input terminals of the OP amplifiers. The high-impedance detecting unit enables a control signal to enable the OP amplifier when the input terminal is not at floating state. The high-impedance detecting unit disables the control signal to disable the OP amplifier when the input terminal is at floating state, so that no output competition between the OP amplifiers is generated.

Abstract: Disclosed is a timing generator of panel display and polarity arrangement control signal generation method therefor. The timing generator comprises a storage unit for storing a plurality of sets of polarity data and corresponding PAC signals, an operation unit for receiving display data, the sets of polarity data, and a corresponding PAC signal so that the operation unit can perform an inner product operation with respect to the polarity data and the display data for obtaining a sum of coupling voltages, and a comparison unit for comparing the sum of coupling voltages with a predetermined value, and outputting the PAC signal corresponding to the polarity data to a data driver if the sum of coupling voltages is smaller than the predetermined value.

Abstract: A liquid crystal display and its driving method utilize a polarity arrangement timing generator to generate signals for polarity-arrangement control. Those signals are output to a polarity arrangement programmable data driver, which accordingly produces a set of signals with aperiodically arranged polarities. Those aperiodic signals are exported to a display panel so that the pixels on the panel are supplied with voltage signals with an aperiodic polarity distribution. Further, picture frames displayed in pre-determined time period have pixel polarity distributions that are mutually complementary; that is, one half of the frames have pixels with polarities exactly opposite to those of the pixels in the other half.