Himax Technologies, Inc.

Hirnax Technologies Limited

Yaw-Guang Chang

Jia-Ming He

Wei-Song Wang

Hui-Min Wang

Yi-Yang Tsai

Zong-You Hou

Guan-Ying Huang

Chang-Hui Lin

Hsien-Ting Huang

Chin-Feng Hsu

Shing-Chia Chen

Chun-Yu Chiu

Chia-Wei Hu

Yi-Long Yang

Yu-Chun Lin

Pei Yao Chang

Shen-Feng Tai

Ming-Cheng Chiu

Chung-Wen Chang

I-Lin Wu

Chen-Ming Hsu

Wei-Ting Suen

Ssu-Chieh Yang

Ling-Yun Wang

Yu-Feng Lin

Cheng-Hung Tsai

Wai-Pan Wu

Jui-Ni Li

Meng-Wei Shen

Wai Pan Wu

Ren-Hao Ye

Kai Chang

Wei-Hsien Yeh

Lieh-Chiu Lin

Shih-Hsien Hsu

Jhou-Pu Yang

Yu-Han Chen

Pei-Yao Chang

Chia-Yi Huang

Ren-Yuan Huang

Yi Wen Wang

De Wei Shen

Yi Chen Tzung

Chih-Ming Wu

Chin-Jung Chen

Zhu-Rong Li

En-Tse Cun

Chi-Hsuan Hsieh

Yi-Ying Tsai

A touch detection circuit includes a plurality of driving signal generators. The driving signal generators are divided into a plurality of driving signal generator groups, and each of the driving signal generator groups comprises at least one of the driving signal generators. The driving signal generators respectively generate a plurality of driving signals, and a frequency of each of the driving signals in one of the driving signal generator groups is different from a frequency of each of the driving signals in another one of the driving signal generator groups.

Touch detection circuit

A touch detection circuit includes at least one driving signal generator. The least one driving signal generator receives a first power voltage and a second power voltage as operation powers. Each of the at least one driving signal generator generates at least one driving signal based on the first power voltage and a second power voltage and each of the at least one driving signal swings between a first voltage and a second voltage, wherein the first voltage is a positive voltage and the second voltage is a negative voltage.

A circuit, for a touch panel, comprising N touch signal processing circuits; a backup processing circuit; and a controller, coupled to the N touch signal processing circuits and the backup processing circuit, configured to determine whether one of the N touch signal processing circuits is failed and generate a determining result, and control the N touch signal processing circuits and the backup processing circuit to process N touch signals received from the touch panel to obtain N digital signals according to the determining result.

Signal processing method and related circuit having backup processing circuit

A display device includes a plurality of display area substrates, a common voltage generator and at least one AC voltage generator. The display area substrates are disposed in a display panel, wherein each of the display area substrates receives a gate line signal, a source line signal and a common voltage. The common voltage generator is coupled to the display area substrates for generating the common voltage to each of the display area substrates. The AC voltage generator is coupled to the common voltage generator, for generating an adjusting voltage to the common voltage according to driving current information of a plurality of source drivers of the display device, wherein the adjusting voltage has an AC voltage level.

Display device and control method thereof

A signal receiver includes a signal receiving line, a signal processing circuit and a compensation circuit. The signal receiving line receives a driving signal through a first capacitor and is coupled to a plurality of display pixel circuits through a second capacitor. The signal processing circuit is coupled to the signal receiving line, receives a received signal on the signal receiving line and generates a touch detection information according to the received signal. The compensation circuit is coupled to the signal receiving line, generates a first compensation current according to driving currents of the display pixel circuits, generates a second compensation current according to sinking currents of the display pixel circuits, and generates a compensation signal according to the first compensation current and the second compensation current.

A touch event processing circuit includes receiving circuits and an average circuit. Each of the receiving circuits includes an operation amplifier, a current processing circuit, and a touch event detection circuit. The operation amplifier receives an input signal from a touch panel, and outputs a first current signal and a second current signal. The current processing circuit processes the first current signal and the second current signal according to a first current average signal and a second current average signal, to generate a processed current signal. The touch event detection circuit detects a touch event according to the processed current signal. The average circuit receives first current signals and second current signals from the receiving circuits; performs an average operation upon the first current signals, to generate the first current average signal; and performs an average operation upon the second current signals, to generate the second current average signal.

Touch event processing circuit

The fingerprint sensing circuit includes a photo detector, a capacitor, a current mirror and a switch circuit. The capacitor has a first terminal electrically connected to the first terminal of the photo detector. The current mirror has an input terminal electrically connected to the first terminal of the photo detector and an output terminal electrically connected to a sensing line. In an exposure period, the switch circuit turns off the current mirror. In a sensing period, the switch circuit turns on the current mirror to generate a current on the sensing line, and the detecting circuit is configured to generate a fingerprint signal according to the current.

Display device and fingerprint sensing circuit

The invention provides a power system for monitoring a working environment of a monitored circuit and adjusting a working voltage of the monitored circuit includes: a power circuit, a voltage-controlled oscillator and a counter. The power circuit is configured to output the working voltage to the monitored circuit through a power supply path. The voltage-controlled oscillator is disposed in or around the monitored circuit and is electrically connected to the power supply path and a ground path to which the monitored circuit is electrically connected, and is configured to output an oscillation frequency in accordance with a signal variation on the power supply path and the ground path. The counter is electrically connected to the voltage-controlled oscillator and is configured to generate a counting number signal in accordance with the oscillation frequency and a synchronizing signal, thereby adjusting the working voltage outputted to the monitored circuit.

Power system and method for monitoring a working environment of a monitored circuit and adjusting a working voltage of the monitored circuit

A duty cycle correction device includes: a phase-locked Loop (PLL)-based duty cycle correction circuit, a bypass duty cycle correction circuit and a multiplexer. The PLL-based duty cycle correction circuit is configured to receive and correct an input clock signal to generate a PLL-based corrected signal. The bypass duty cycle correction circuit is configured to be clocked by the input clock signal to sample a logic signal at its input terminal to generate a bypass corrected signal. The multiplexer is coupled to the PLL-based duty cycle correction circuit and the bypass duty cycle correction circuit and is configured to select one of the PLL-based corrected signal, the bypass corrected signal and the input clock signal as an output clock signal.

Duty cycle correction device for use in cascaded circuits and related large touch and display driver integration system

Circuit for performing a display driving function and a fingerprint and touch detecting function includes a unity gain buffer amplifier, an operational amplifier integrator, an ADC circuit, and a digital processing circuit coupled to the ADC circuit. An input terminal of the operational amplifier integrator is coupled to a touch sensor. When the circuit is operated under a display driving mode, an input terminal of the unity gain buffer amplifier receives a gray level voltage and an output terminal of the unity gain buffer amplifier is coupled to a display panel. When the circuit is operated under a fingerprint detecting mode, the input terminal and the output terminal of the unity gain buffer amplifier are respectively coupled to a fingerprint sensor and the ADC circuit. When the circuit is operated under a touch detecting mode, an output terminal of the operational amplifier integrator is coupled to the ADC circuit.

Circuit for performing display driving function and fingerprint and touch detecting function

A touch control circuit for use in a display device includes: a plurality of analog-to-digital converters and a controller. Each of the analog-to-digital converters is coupled to at least one of a plurality of touch sensing electrodes and at least one of a plurality of source drivers of the display device. At least one of the analog-to-digital converters is configured to generate a first measured digital code according to an output voltage outputted by at the least one of the source drivers. The controller is coupled to the analog-to-digital converters, and configured to compare the first measured digital code with an input digital code that the output voltage of the at the least one of the source drivers corresponds to, thereby to generate a first safety detection result regarding the at least one of the source drivers.

Safety detection method for use in display device and related touch control circuit and touch and display driver integration

A fingerprint recognition driving device includes a plurality of light sensors and a plurality of signal processing circuits. The light sensors respectively generate a plurality of sensing signals. The signal processing circuits respectively coupled to the light sensors, for processing the sensing signals to generate a plurality of processed sensing signals. During each of a plurality of sensing periods, one of the signal processing circuits provides corresponding processed sensing signal with a first polarity, and each of the other signal processing circuits provides corresponding processed sensing signals with a second polarity, and the first polarity is different from the second polarity. The signal processing circuits generates an output signal according to the processed sensing signals.

Fingerprint recognition driving device

A pad configuration adaptable to a display system includes a plurality of input bond pads, via which a driver of the display system is mounted and signals are inputted to the driver; and a plurality of output bond pads, via which the driver is mounted and signals are outputted to a display panel of the display system. Input and output bond pads corresponding to one of two neighboring drivers are point symmetric with input and output bond pads corresponding to the other of the two neighboring drivers.

Display system and a pad configuration adaptable thereto

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Tainan, Taiwan

Yaw-Guang Chang