Himax Technologies, Inc.

Himan Technologies Limited

Ren-Hao Ye

Hui-Min Wang

Yaw-Guang Chang

The touch-and-display panel includes multiple sensing electrodes in the display area. A circuit is disposed in the non-display area and electrically connected to the sensing electrodes through sensing lines. A peripheral electrode is disposed in the non-display area. In a display period, the circuit applies a common voltage to the sensing electrodes through the sensing lines. In a touch sensing period, the circuit transmits a touch sensing signal to the sensing electrodes through the sensing lines, and determines whether each of the sensing electrodes is touched based on capacitance of the sensing electrodes. In a stylus sensing period, the circuit transmits an uplink signal to the sensing electrodes and the peripheral electrode, and receives a downlink signal from the active stylus through the sensing electrodes, and determines a stylus location corresponding to the active stylus according to the downlink signal.

Touch-and-display device and sensing system with peripheral electrode for transmitting uplink signal

A touch-and-display device operated with an active stylus is provided. The touch-and-display device includes a touch-and-display panel and a circuit. In a touch sensing period, the circuit transmits a touch sensing signal to multiple sensing electrodes and determines at least one touched electrode and at least one untouched electrode of the sensing electrodes based on capacitance of the sensing electrodes. In a stylus sensing period, the circuit transmits an uplink signal to the untouched electrodes and applies a direct current voltage to the touched electrodes. The uplink signal is a time-varying signal.

Touch-and-display device and sensing system

The present invention provides an in-cell touch panel sensing system and a sensing method. The in-cell touch panel sensing system comprises sensing arrays. Each sensing array comprises: sensor plates; a first multiplexer (MUX), a first analog-to-digital converter (ADC), a second MUX, a second ADC, a third MUX, a third ADC, a fourth MUX, and a fourth ADC. The first MUX is coupled to a first row of the sensor plates and a first column of the sensor plates. The first ADC is coupled to the first MUX. The second MUX is coupled to a second row of the sensor plates and a second column of the sensor plates. The third MUX is coupled to a third row of the sensor plates and a third column of the sensor plates. The fourth MUX is coupled to a fourth row of the sensor plates and a fourth column of the sensor plates.

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Tainan, Taiwan

Ren-Hao Ye