Abstract: An ultrasonic fingerprint apparatus and an electronic device are provided. The ultrasonic fingerprint apparatus is disposed under a display of an electronic device to implement under-display ultrasonic fingerprint recognition. The ultrasonic fingerprint apparatus includes an ultrasonic fingerprint chip and a piezoelectric transducer disposed on the ultrasonic fingerprint chip. The piezoelectric transducer includes a piezoelectric layer, an upper electrode on the piezoelectric layer, and a lower electrode under the piezoelectric layer. The ultrasonic fingerprint chip is a CMOS chip. The upper electrode is led out to a surface of the CMOS chip, and is connected to one end of a lead via a pad on the surface of the COMS chip, and the other end of the lead is connected to a circuit board under the ultrasonic fingerprint chip, to implement an electrical connection between the piezoelectric transducer and the circuit board.

Abstract: An ultrasonic fingerprint detection device and an electronic device are provided, which can reduce the size, circuit complexity and cost of the ultrasonic fingerprint detection device. The ultrasonic fingerprint detection device includes: a signal generation circuit and an ultrasonic fingerprint sensor chip, where the signal generation circuit is composed of discrete devices and the signal generation circuit includes: a control circuit and a resonant circuit, the control circuit is configured to receive a control signal provided by the ultrasonic fingerprint sensor chip and generate an excitation signal under the action of the control signal, and the resonant circuit is configured to receive the excitation signal and form a drive signal under the action of the excitation signal; and the ultrasonic fingerprint sensor chip is configured to receive the drive signal, and generate an ultrasonic signal for fingerprint detection under the action of the drive signal.

Abstract: Embodiments of the present disclosure provide methods and apparatuses for detecting an ambient light illuminance and for computing a correction coefficient, and an electronic device. The method for detecting an ambient light illuminance includes: filtering ambient light based on a monochromatic channel, such that a quantum efficiency curve of the filtered light matches a spectral luminous efficiency curve; and performing photoelectric detection on the filtered light to obtain an illuminance level of the ambient light.

Abstract: Embodiments of the present application provide a method and apparatus for locating a sensor under a display screen and an electronic device, which can effectively improve performance of the sensor, thereby improving performance of the electronic device. The method includes: acquiring an assembly tolerance region in the display screen, where the assembly tolerance region corresponds to an assembly tolerance of the sensor; lighting up pixels at different positions within the assembly tolerance region sequentially; acquiring multiple pieces of sensing data of the sensor when the pixels at different positions are lit up sequentially, the multiple pieces of sensing data being data obtained after the sensor sequentially receives light signals emitted by the pixels at different positions; and determining a position of the sensor according to the multiple pieces of sensing data.

Abstract: An ultrasonic transceiver system and an electronic device. The ultrasonic transceiver system includes a signal generating circuit and an ultrasonic sensor chip. The signal generating circuit is composed of discrete devices and includes a pulse generating circuit and a resonance circuit. The pulse generating circuit receives a control signal output by the ultrasonic sensor chip, and generates, according to the control signal, a first pulse voltage signal and a second pulse voltage signal which are in opposite phase to each other, and the resonant circuit receives the first pulse voltage signal and the second pulse voltage signal which are in opposite phase to each other and generates a drive signal under action of the first pulse voltage signal and the second pulse voltage signal. The ultrasonic sensor chip receives the drive signal and generates an ultrasonic signal according to the drive signal.

Abstract: An embodiment of the present application provides an optical fingerprint identification apparatus, which includes: at least one non-visible light source, configured to emit non-visible light to a human finger to provide excitation light for fingerprint identification; an optical component, disposed under a fingerprint detecting area of the display screen, and configured to receive signal light scattered and reflected by the human finger; and a fingerprint sensor configured to perform imaging based on the signal light passing through the optical component, where a working wave band of the fingerprint sensor is the same as a light emitting wave band of the non-visible light source, a number of the working wave bands is the same as the number of the light emitting wave bands, and the fingerprint sensor is connected to the non-visible light source, and is configured to control the non-visible light source to actively emit light.

Abstract: Embodiments of the present application provide a method and apparatus for locating a sensor under a display screen and an electronic device, which can effectively improve performance of the sensor, thereby improving performance of the electronic device. The method includes: acquiring an assembly tolerance region in the display screen, where the assembly tolerance region corresponds to an assembly tolerance of the sensor; lighting up pixels at different positions within the assembly tolerance region sequentially; acquiring multiple pieces of sensing data of the sensor when the pixels at different positions are lit up sequentially, the multiple pieces of sensing data being data obtained after the sensor sequentially receives light signals emitted by the pixels at different positions; and determining a position of the sensor according to the multiple pieces of sensing data.

Abstract: A laser emitting apparatus includes: a drive assembly, a laser emitter, an energy storage module, and a circuit board. The laser emitter is a laser emitter die. An input end of the laser emitter is electrically connected to the energy storage module, and an output end is electrically connected to the drive assembly. The energy storage module is used to generate electrical signals required for driving the laser emitter. The drive assembly is used to output the driving signal to control the energy storage module and the external power supply to output the electrical signal to the laser emitter, so as to enable the laser emitter to emit laser. The drive assembly, the laser emitter, and the energy storage module are fixed on the circuit board, and a ground layer is arranged in the circuit board.

Abstract: Embodiments of the present disclosure provide methods and apparatuses for detecting an ambient light illuminance and for computing a correction coefficient, and an electronic device. The method for detecting an ambient light illuminance includes: filtering ambient light based on a monochromatic channel, such that a quantum effect curve of the filtered light matches a spectral luminous efficiency curve; and performing photoelectric detection on the filtered light to obtain an illuminance level of the ambient light.

Abstract: A fingerprint identification apparatus and an electronic device. The fingerprint identification apparatus includes: a fingerprint sensor; and the fingerprint sensor including an optical sensing array, wherein a spatial period N of the optical sensing array satisfies N<M/2K; wherein M is a spatial period of a light-emitting pixel array, and K is a zoom ratio between an image displayed in a sensing area of the fingerprint sensor and an image captured in the sensing area by the fingerprint sensor. By clarifying the relationship between the spatial period of the light-emitting pixel array in the display screen and the spatial period of the optical sensing array in the fingerprint sensor, it can avoid the sensor from generating moiré fringes when imaging based on light received by transmitting through the display screen, thereby improving fingerprint identification performance.

Abstract: The embodiments of the present application provide a fingerprint identification apparatus, which has a smaller thickness and a better imaging effect at the same time. The fingerprint identification apparatus includes: a light path directing structure disposed between a display screen and an optical fingerprint sensor for directing a light signal that is obliquely incident on a finger above the display screen at a preset angle and reflected by the finger to the optical fingerprint sensor; and the optical fingerprint sensor disposed below the light path directing structure for detecting the received light signal.

Abstract: A fingerprint identification apparatus and an electronic device applicable to an electronic device having a display screen, including: an optical function layer, disposed between the display screen and a middle frame of the electronic device, wherein the optical function layer includes a quarter-wave plate and a polarizer, and the polarizer is disposed under the quarter-wave plate; and an optical fingerprint module, disposed under the optical function layer, and configured to receive a fingerprint optical signal transmitted through the quarter-wave plate and the polarizer, wherein the fingerprint detecting signal is used for detecting fingerprint information of a finger.

Abstract: Embodiments of the present application disclose a fingerprint identification apparatus and an electronic device. The fingerprint identification apparatus is applicable to an electronic device having a display screen and comprises: an optical fingerprint sensor disposed under the display screen, wherein the optical fingerprint sensor comprises a photosensitive region, the photosensitive region comprises a plurality of sensing units, and the sensing units are configured to detect an optical signal returned via reflection on a finger surface; a light path directing structure disposed between the display screen and the optical fingerprint sensor; and a filter film formed above the photosensitive region of the optical fingerprint sensor and configured to filter the optical signal to filter out interference light.

Abstract: A key detecting method and apparatus, which relate to touch sensing technologies, where the key detecting method includes: sampling an output signal value, and calculating a current noise value and a current signal value respectively according to the sampling result (S101); determining, according to the current noise value and the current signal value, whether a noise variation and a signal variation reach a corresponding noise variation threshold and signal variation threshold, respectively (S102); and determining an operating state of a key according to the determination result (S103). With the above method and apparatus, there is no need to additionally provide a complex auxiliary circuit to realize detection of a state of the key, instead, a state of a smart terminal is determined by correspondingly sampling and calculating the signal value, thereby reducing the cost and meanwhile improving the accuracy of the detection of the state of the key.

Abstract: A fingerprint identification apparatus and an electronic device. The fingerprint identification apparatus includes: a fingerprint sensor; and the fingerprint sensor including an optical sensing array, wherein a spatial period N of the optical sensing array satisfies N<M/2K; wherein M is a spatial period of a light-emitting pixel array, and K is a zoom ratio between an image displayed in a sensing area of the fingerprint sensor and an image captured in the sensing area by the fingerprint sensor. By clarifying the relationship between the spatial period of the light-emitting pixel array in the display screen and the spatial period of the optical sensing array in the fingerprint sensor, it can avoid the sensor from generating moiré fringes when imaging based on light received by transmitting through the display screen, thereby improving fingerprint identification performance.

Abstract: A fingerprint sensor and an electronic terminal are provided. The fingerprint sensor includes: a fingerprint sensor chip and a floating ground control circuit. The fingerprint sensor chip includes a sensor array including a plurality of sensing electrodes and a driver. The sensing electrode in the sensor array is configured to form a fingerprint capacitor with a finger. The driver is configured to output a driving signal to the floating ground control circuit. The fingerprint sensor chip includes a sensor power supply end and a sensor ground. The sensor power supply end and the sensor ground are connected to the floating ground control circuit and are respectively configured to receive a high potential and a low potential output by the floating ground control circuit. The output high potential and low potential substantially synchronously vary to maintain a substantially constant voltage which is supplied to the fingerprint sensor chip.

Abstract: An embodiment of the present application provides an optical fingerprint identification apparatus, which includes: at least one non-visible light source, configured to emit non-visible light to a human finger to provide excitation light for fingerprint identification; an optical component, disposed under a fingerprint detecting area of the display screen, and configured to receive signal light scattered and reflected by the human finger; and a fingerprint sensor configured to perform imaging based on the signal light passing through the optical component, where a working wave band of the fingerprint sensor is the same as a light emitting wave band of the non-visible light source, a number of the working wave bands is the same as the number of the light emitting wave bands, and the fingerprint sensor is connected to the non-visible light source, and is configured to control the non-visible light source to actively emit light.

Abstract: Embodiments of the present application disclose a fingerprint identification apparatus and an electronic device. The fingerprint identification apparatus is applicable to an electronic device having a display screen and comprises: an optical fingerprint sensor disposed under the display screen, wherein the optical fingerprint sensor comprises a photosensitive region, the photosensitive region comprises a plurality of sensing units, and the sensing units are configured to detect an optical signal returned via reflection on a finger surface; a light path directing structure disposed between the display screen and the optical fingerprint sensor; and a filter film formed above the photosensitive region of the optical fingerprint sensor and configured to filter the optical signal to filter out interference light.

Abstract: The embodiments of the present application provide a fingerprint identification apparatus, which has a smaller thickness and a better imaging effect at the same time. The fingerprint identification apparatus includes: a light path directing structure disposed between a display screen and an optical fingerprint sensor for directing a light signal that is obliquely incident on a finger above the display screen at a preset angle and reflected by the finger to the optical fingerprint sensor; and the optical fingerprint sensor disposed below the light path directing structure for detecting the received light signal.

Abstract: A fingerprint identification apparatus and an electronic device applicable to an electronic device having a display screen, including: an optical function layer, disposed between the display screen and a middle frame of the electronic device, wherein the optical function layer includes a quarter-wave plate and a polarizer, and the polarizer is disposed under the quarter-wave plate; and an optical fingerprint module, disposed under the optical function layer, and configured to receive a fingerprint optical signal transmitted through the quarter-wave plate and the polarizer, wherein the fingerprint detecting signal is used for detecting fingerprint information of a finger.