Focaltech Electronics, Ltd.

Yunn-Hwa Wang

Kuet Liong Fam

A touch display control circuit, a control method, and an electronic device are provided. The touch display control circuit is configured to drive STN-LCD screens, TN-LCD screens and CSTN-LCD screens. The touch display control circuit includes a display driving circuit and a touch detection circuit. The display driving circuit includes a signal transmission line, multiple groups of signal selection circuits and a reference voltage generation circuit. The signal transmission line is configured to transmit a gate signal and a common signal. The signal selection circuit is configured to select a preset control voltage based on display control timing or touch control timing. The reference voltage generation circuit is configured to provide the preset control voltage. The touch detection circuit is connected to the signal selection circuit and is configured to perform touch detection based on the touch control timing.

Touch display control circuit, control method and electronic device

A fingerprint sensing chip and a terminal device are provided. The fingerprint sensing chip includes a first signal, a second signal and a driving signal. The second signal is generated based on the first signal, and the driving signal is generated by performing a ground raise process on the second signal. The driving signal is used to provide a driving voltage for fingerprint sensing.

Fingerprint sensing chip and terminal device

Sending, receiving and transmitting apparatuses of a dual-power system and a fingerprint recognition system are provided. The dual-power system includes a first power system for providing a first high voltage signal and a first low voltage signal and a second power system for providing a second high voltage signal and a second low voltage signal, and a voltage difference between the first high voltage signal and the first low voltage signal is equal to that between the second high voltage signal and the second low voltage signal. The sending apparatus includes a first detection circuit for outputting a detection signal indicating whether voltages of the first and second low voltage signals are equal; and a first transmission circuit for transmitting an output signal of the dual-power system or provide a first voltage to an output terminal of the sending apparatus, based on the detection signal.

Growing community of inventors

Guangdong, China

Yunn-Hwa Wang