Mstar Semiconductor, Inc.

System General Corporation

Hsuan-I Pan

Guo-Kiang Hung

Kai-Ting Ho

Ta-Yung Yang

Chern-Lin Chen

Jenn-Yu G Lin

Song-Yi Lin

Chao-Cheng Wen

Ting-Hao Yeh

Hung I Wang

Meng-Chang Lee

Shih-Tsung Yang

Hsien-Keng Lin

Chih-Ying Chen

Kuo-Chao Liao

Ming-Chang Tsai

A touch sensing circuit is applied to a touch panel to generate a sensing signal. The touch panel includes a sensing device. The touch sensing circuit includes: an interference signal detecting circuit, configured to detect an interference signal of the touch panel to generate an interference signal detection result; a control signal generating unit, configured to generate a control signal according to the interference signal detection result; and a sensed value analyzing circuit, configured to charge the sensing device in a first time interval and to discharge the sensing device in a second time interval, and to generate the sensing signal according to a sensed value of the sensing device. A length of one of the first time interval and the second time interval changes according to a control signal.

Touch sensing circuit and method thereof

A capacitance sensing apparatus applied to a touch panel is provided. The capacitance sensing apparatus includes a plurality of sensor channels including a first sensor channel and a second sensor channel neighboring to each other. A first voltage signal is outputted to the first sensor channel. A plurality of capacitances of the first sensor channel are detected to generate a first capacitance result for touch sensing. A second voltage signal is outputted to the second sensor channel. A first voltage difference is present when the first voltage signal and the second voltage signal are respectively outputted to the first sensor channel and the second sensor channel, and a second voltage difference is present when the capacitance of the first sensor channel. The first voltage difference and the second voltage difference are substantially the same.

Capacitance sensing apparatus and control method

A touch sensing circuit and method is provided. The touch sensing circuit discriminates a common voltage change of a display panel couple to the touch sensor in a touch panel display apparatus. The touch sensor comprises a plurality of sensor electrodes. The touch sensing circuit includes a plurality of channel circuits, each of which includes a reset switch and a sensing switch for alternately conducting an associated sensor electrode to a reset voltage and a charge collecting circuit. The channel circuits are divided to different groups that operate according to interleaving timings for encompassing possible common voltage changes.

Touch sensing circuit and associated method

A method for touch detection is provided for detecting a touch point on a display device. The method includes: providing a display signal, according to which the display device has two parts of a vertical blanking interval within each frame period, wherein the two parts of the vertical blanking interval are discontinuous; and performing a touch detection in the two parts of the vertical blanking interval, respectively. The touch detection method is capable of performing multiple touch detections within one frame period.

Touch detection method and associated apparatus

A driving apparatus for an electrode in a capacitive touch control system is provided. The driving apparatus includes a signal generating module and an adjusting module. The signal generating module generates a driving signal. The adjusting module is connected between the signal generating module and the electrode, and generates an adjusted signal according to the driving signal to replace the driving signal. The adjusting module controls a rising edge or a falling edge of the waveform of the adjusted signal, so that a high-frequency component in the adjusted signal is less than that in the driving signal.

Capacitive touch control system and driving apparatus thereof

A touch sensing device is provided. A shielding plate is provided for covering and shielding wires that route sensing electrodes to a flexible circuit board. Alternatively, a conductive layer of the circuit board is applied for shielding a plurality of contacts of the electrodes and wires. Wires that couple two same typed electrodes extend as a shielding plate for shielding contacts of another type of electrodes. An auxiliary electrode bordering outside the sensing electrodes can be provided to compensate fringe effects of the sensing electrodes.

Touch sensing device

A touch sensing device is provided. The touch sensing device includes a multiplexer and a control unit, and is electrically connected to a touch panel. The touch panel includes a plurality of first-direction electrodes; a plurality of second-direction electrodes; and a dielectric layer, for generating at least one electric field change corresponding to at least one touch point in response to the at least one touch point. The at least one electric field change is generated at an overlapping region of the first-direction and second-direction electrodes. The multiplexer is electrically connected to the touch panel via the first-direction and second-direction electrodes, and selectively performs voltage driving or voltage sensing for the first-direction and second-direction changes a control signal to be transmitted to the multiplexer and receives a sense signal from the multiplexer.

Touch sensing device and apparatus and touch sensing method

A light emitting diode (LED) driving system drives a plurality of LED strings. A plurality of current sources are respectively connected to the plurality of LED strings. A multi-phase control signal generator generates a plurality of multi-phase control signals that respectively maintain turn on or turn off states of the current sources so as to selectively conduct the corresponding LED strings.

LED driving system and driving method thereof

A capacitive touch sensing structure includes: a substrate; a plurality of first electrode groups arranged from a first position towards a second position in a first direction, wherein each of the first electrode groups includes a plurality of first electrodes extended from a third position towards a fourth position in a second direction; a plurality of first conducting wires each having a plurality of contacts respectively coupled to the first electrodes of each of the first electrode groups; a plurality of second electrode groups arranged from the first position towards the second position in the first direction, wherein each of the second electrode groups includes a plurality of second electrodes extended from the fourth position towards the third position in the second direction and respectively staggering with the first electrode groups; and a plurality of second conducting wires each having a plurality of contacts respectively coupled to the electrodes of each of the second electrode groups.

Capacitive touch sensing structure and sensing method thereof

A level shifter and an associated booster driving circuit are provided. The level shifter includes an input stage and an output stage. The input stage includes an input switch, which receives an input signal and is selectively turned on according to the input signal. The output stage outputs a gate driving signal. The gate driving signal is at a low logic level when the input switch is turned on, and is at a high logic level when the input switch is turned off. The logic level of the input signal is substantially the same as the logic level of the gate driving signal.

Level shifter and boost driving circuit

A method and apparatus to dynamically modify the internal compensation of a low drop-out (LDO) voltage regulator is presented. The process involves creating an additional equivalent series resistance (ESR) from an internal circuit. The additional ESR of the internal circuit is sufficient to ensure the DC output stability. This allows the ESR of the output capacitance to be reduced to zero if desired, for improved transient response.

Low drop-out voltage regulator and an adaptive frequency compensation

A method an apparatus to dynamically modify the internal compensation of a low drop-out (LDO) linear voltage regulator is presented. The process involves creating an additional equivalent series resistance (ESR) from an internal circuit. The additional ESR of the internal circuit is sufficient to ensure DC output stability. This allows the ESR of the output capacitance to be reduced to zero if desired, for improved transient response. The zero induced by the ESR of the internal circuit is frequency compensated, so that it tracks the position of the output pole as the load varies.

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Taipei, Taiwan

Hsuan-I Pan