Abstract: 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.

Abstract: A detection circuit adaptable to a fingerprint detection system includes an integrating amplifier coupled to receive a photo-detected voltage from a sensor panel and configured to generate time integral of the photo-detected voltage, thereby resulting in a time-integral signal; and an analog-to-digital converter (ADC) that converts the time-integral signal into a digital form. A first common-mode voltage of the sensor panel is coupled to the integrating amplifier to prevent noise occurred in the first common-mode voltage from affecting the time-integral signal.

Abstract: A low power consumption boost circuit for providing high driving voltage of a touch circuit is provided. The low power consumption boost circuit includes a charge pump circuit, two digital-to-analog converters (DACs), and a switch circuit. The charge pump circuit receives a system voltage and correspondingly outputs a positive output voltage twice the system voltage and a negative output voltage with opposite polarity as the system voltage. One of the DACs receives the positive output voltage from the charge pump circuit as supply voltage, and the other DAC receives the negative output voltage from the charge pump circuit as supply voltage. The switch circuit is connected between the DACs and the touch circuit. The DACs are connected between the charge pump circuit and the switch circuit. The DACs are alternately connected to the touch circuit by controlling the switch circuit, thereby driving the touch circuit alternately.

Abstract: The fingerprint sensing circuit includes pixel sensors with photo sensors. Sensing currents produced by first pixel sensors are averaged. The average current is subtracted from sensing current produced by second pixel sensors to generate a difference current. During a capture period, a converting circuit outputs a digital signal in response to the difference current. This circuit aims to reduce noise in fingerprint recognition technology.

Abstract: A display device is disclosed, which includes a display panel and a detection circuit. The display panel has pixels configured to display an image. The pixels include display and photo sensing pixels that are arranged in sensing channels. Each display and photo sensing pixel includes a display region and a photo sensing region. The display region emits light. The photo sensing region detects the light emitted by the display region and reflected from a biometric object and to convert the reflected light into photo detection signals. The detection circuit has differential signal processing circuitries that are coupled to the photo sensing regions of the display and photo sensing pixels. Each differential signal processing circuitry performs a differential operation on the photo detection signals of adjacent two of the sensing channels to generate a difference signal that is used to construct a biometric pattern corresponding to the biometric object.

Abstract: A transceiver with wake up detection includes a primary control unit, a transmission unit and a receiving unit, the transmission unit comprises a first logic set, a second logic set, a third logic set, a first loop, and a second loop. The first loop outputs a first differential signal, and the second loop outputs a second differential signal. The receiving unit comprises a wake up detection circuit having a first comparator, a second comparator and a fourth logic set. When the first comparator and the second comparator receive a first predetermined level of the first differential signal and a second predetermined level of the second differential signal, the fourth logic set outputs an idle state signal and a data signal to the primary control unit to make an operation mode of the transceiver switched from a low power mode to a normal mode.

Abstract: A transceiver with wake up detection includes a primary control unit, a transmission unit and a receiving unit, the transmission unit comprises a first logic set, a second logic set, a third logic set, a first loop, and a second loop. The first loop outputs a first differential signal, and the second loop outputs a second differential signal. The receiving unit comprises a wake up detection circuit having a first comparator, a second comparator and a fourth logic set. When the first comparator and the second comparator receive a first predetermined level of the first differential signal and a second predetermined level of the second differential signal, the fourth logic set outputs an idle state signal and a data signal to the primary control unit to make an operation mode of the transceiver switched from a low power mode to a normal mode.