Abstract: The present invention is directed to a method of driving an in-cell touch screen. Source lines underlying a current VCOM electrode are divided into n groups. A first voltage is applied at the current VCOM electrode in a conversion phase of each sensing period. A second voltage is applied at each group of the source lines underlying the current VCOM electrode in a manner such that no net charge being contributed to the VCOM electrode by the underlying source lines, thereby parasitic capacitors associated with the current VCOM electrode having no effect on touch sensing result.

Abstract: A material identifying system includes an identifying panel, a voltage source and a determining circuit. The voltage source is arranged to transmit a voltage signal to an object to be identified via the identifying panel in order to obtain an impedance of the object, wherein the voltage source adjusts a frequency of the voltage signal in a predetermined range to find a specific frequency in the predetermined range where the impedance of the object is minimum. The determining circuit is arranged to determine if the specific frequency of the object to be identified matches any specific frequency of a plurality of known materials in order to identify a material of the object.

Abstract: A dermatoglyph identification apparatus and an identifying method thereof are provided. The dermatoglyph identification apparatus includes a switch circuit, a signal source and a plurality of sensors. The signal source is selectively connected to the sensors through an impedance element. The switch circuit switches at least one sensor to be connected to the impedance element, and switches rest of the sensors to be connected to a ground terminal of the signal source. The dermatoglyph identification apparatus identifies dermatoglyph according to a sensing signal generated by the sensor connected to the impedance element in response to a reference signal of the signal source.

Abstract: The present invention is directed to a method of driving an in-cell touch screen. A common voltage (VCOM) layer of the in-cell touch screen is divided into transmit (TX) electrodes and receive (RX) electrodes, the TX electrodes forming TX electrode lines in a first direction and the RX electrodes forming RX electrode lines in a second direction. The TX electrode lines are arranged into a plurality of groups. The groups of TX electrode lines are concurrently scanned in touch sensing mode.

Abstract: A material identifying system includes an identifying panel, a voltage source and a determining circuit. The voltage source is arranged to transmit a voltage signal to an object to be identified via the identifying panel in order to obtain an impedance of the object, wherein the voltage source adjusts a frequency of the voltage signal in a predetermined range to find a specific frequency in the predetermined range where the impedance of the object is minimum. The determining circuit is arranged to determine if the specific frequency of the object to be identified matches any specific frequency of a plurality of known materials in order to identify a material of the object.

Abstract: A capacitor sensor apparatus and a sensing method thereof are provided. Oscillation signals with different frequencies are provided to a driving circuit and a mixer separately. The mixer mixes the oscillation signal with a lower frequency with a band-pass filtered signal. A band-pass filtering operation for generating the band-pass filtered signal is performed on a sensing signal before the mixer performs the mixing operation.

Abstract: The prevent disclosure is directed to a touching sensing circuit for an in-cell display panel. An electrode is disposed between two substrates of the in-cell display panel. An operational amplifier has a first input terminal coupled to the electrode. A signal generating circuit is coupled to a second input terminal of the operational amplifier and outputs a programmable signal during a touch sensing period. A capacitor is coupled between the first input terminal and an output terminal of the operational amplifier. A comparator has a first input terminal coupled to the output terminal of the operational amplifier, and a second input terminal coupled to a reference voltage. A feedback circuit is coupled between the output terminal of the comparator and the first input terminal of the operational amplifier. The programmable signal does not have a square waveform, and no switch is disposed between the operational amplifier and the electrode.

Abstract: The present disclosure provides a touch display having a force touch function. The touch display includes a backlight module, a liquid display panel and a force touch sensing circuit. The backlight module is configured to output light and includes a metal layer and a sensing layer. The liquid display panel includes a plurality of data lines and a plurality of gate lines. The force touch sensing circuit is electrically connected to a plurality of first sensing lines to sense a force of the touch of the user through the sensing layer, in which the first sensing lines are the data lines or the gate lines. In some cases, the sensing layer can be omitted, and the metal layer is used to replace the sensing layer.

Abstract: A fingerprint identification system is provided. The fingerprint identification system includes a sensing panel and a driving circuit. The sensing panel includes a plurality of sensors. Each of the sensors transmits a sensing signal and a reference signal through two signal transmission paths. The driving circuit is coupled to the sensing panel. The driving circuit is configured to drive the sensing panel, and execute a fingerprint identification operation according to the sensing signal and the reference signal. The sensing signal and the reference signal form a differential signal pair. The driving circuit generates a fingerprint identification signal according to the sensing signal and the reference signal. A driving circuit and a fingerprint identification method are also provided.

Abstract: A fingerprint identification device includes a sensing array, a reading line, a first signal source, and first to third signal lines. The reading line is disposed in a first metal layer and is electrically connected to a sensing electrode. The first signal source generates a reference signal and is connected to the reading line through an impedance element. The sensing electrode and the impedance element generate a sensing signal in response to the reference signal. The first and second signal lines are disposed in the first metal layer. The third signal line is disposed in a second metal layer. The reading line is disposed between the first and second signal lines. An orthogonal projection of the reading line on the second metal layer overlaps an orthogonal projection of the third signal line on the second metal layer. The first to third signal lines receive the reference signal.

Abstract: A fingerprint identification device includes a sensing array, a reading line, a first signal source, and first to third signal lines. The reading line is disposed in a first metal layer and is electrically connected to a sensing electrode. The first signal source generates a reference signal and is connected to the reading line through an impedance element. The sensing electrode and the impedance element generate a sensing signal in response to the reference signal. The first and second signal lines are disposed in the first metal layer. The third signal line is disposed in a second metal layer. The reading line is disposed between the first and second signal lines. An orthogonal projection of the reading line on the second metal layer overlaps an orthogonal projection of the third signal line on the second metal layer. The first to third signal lines receive the reference signal.

Abstract: A fingerprint identification system is provided. The fingerprint identification system includes a sensing panel and a driving circuit. The sensing panel includes a plurality of sensors. Each of the sensors transmits a sensing signal and a reference signal through two signal transmission paths. The driving circuit is coupled to the sensing panel. The driving circuit is configured to drive the sensing panel, and execute a fingerprint identification operation according to the sensing signal and the reference signal. The sensing signal and the reference signal form a differential signal pair. The driving circuit generates a fingerprint identification signal according to the sensing signal and the reference signal. A driving circuit and a fingerprint identification method are also provided.

Abstract: A controller adapted to an in-cell touch screen includes a common voltage (VCOM) circuit generating a common voltage at an output node of the VCOM circuit, and a detecting circuit receiving a sensing signal at an input/output node of the detecting circuit. A display-mode switch is closed in a display mode such that a VCOM electrode is set at the common voltage, and a touch-sensing-mode switch is closed in a touch sensing mode such that the sensing signal from the VCOM electrode is received and processed by the detecting circuit. The detecting circuit has full-swing power that contains full-swing power of the VCOM circuit.

Abstract: A touch driving apparatus, a touch driving method, and a touch display system are provided. The touch display system includes a touch display panel, a common voltage generator, and a touch driving apparatus. The touch driving apparatus includes a driving circuit, a capacitor, and a sensing circuit. An output terminal of the driving circuit is electrically connected to a driving electrode line of the touch display panel. During a touch driving period, the driving circuit outputs a driving signal to the driving electrode line. A first terminal of the capacitor is electrically connected to a common electrode line of pixels of the touch display panel. An input terminal of the sensing circuit is electrically connected to a second terminal of the capacitor. During a touch driving period, the sensing circuit senses the common electrode line through the capacitor to detect a touch event of the touch display panel.

Abstract: A method of waking up a device includes capturing an image by scanning a fingerprint pattern in a sleep mode; analyzing the captured image representing the scanned fingerprint pattern to obtain an amount of pixels in the captured image with respect to each brightness value; transforming the analyzed captured image into brightness distribution; operating the brightness distribution to obtain a feature value; and comparing the feature value with a pre-stored value, the device being woken up when the feature value is matched with the pre-stored value.

Abstract: A capacitive touch device and a detection method of a capacitive touch panel thereof are provided. The capacitive touch device includes a plurality of touch electrodes, a detector unit, a plurality of switch units and a touch point determination unit. The detector unit is used for providing a plurality of capacitances after detecting the touch electrodes. The switch units couple the detector unit to the touch electrodes and provide a ground voltage to the touch electrodes which are not coupled to the detector unit. The touch point determination unit is coupled to the detector unit to determine whether the touch electrodes are touched according the capacitances and provides touch information accordingly.

Abstract: A touch screen includes a display, a touch sensor disposed above or within the display, and a conductive layer disposed under the display for detecting pressure.

Abstract: A controller adapted to an in-cell touch screen includes a common voltage (VCOM) circuit generating a common voltage at an output node of the VCOM circuit, and a detecting circuit receiving a sensing signal at an input/output node of the detecting circuit. A display-mode switch is closed in a display mode such that a VCOM electrode is set at the common voltage, and a touch-sensing-mode switch is closed in a touch sensing mode such that the sensing signal from the VCOM electrode is received and processed by the detecting circuit. The detecting circuit has full-swing power that contains full-swing power of the VCOM circuit.

Abstract: A touch display module, a driving method thereof and a source driver are provided. The touch display module includes a touch display panel and at least one source driver. The source driver is coupled to a plurality of data lines of the touch display panel. In a display mode, the source driver respectively outputs a plurality of pixel driving signals to the data lines for driving the touch display panel to display a corresponding image. In a touch mode, the source driver clusters the data lines into multiple groups, and respectively outputs a plurality of touch driving signals to the groups. The data lines belonging to a same group are provided with a same touch driving signal in the touch mode.

Abstract: Disclosed herein are touch screens that integrate touch sensing systems with display devices. The touch sensing system serves data lines and common electrodes of a driving circuitry of the display device as touch driving lines and touch sensing lines for touch sensing operations. A common electrode layer having the common electrodes of the driving circuitry includes a plurality of openings for reducing a base mutual-capacitance of the touch sensing system.