Abstract: The present application discloses a PPG circuit, a biological characteristics detection device and a biological characteristics detection method. The PPG circuit is configured to control a light source and N photoelectric converters to sense biological characteristics of an object under test; the PPG circuit includes: a transmitting channel, K receiving channels, wherein the N photoelectric converters are divided into K sets of photoelectric converter sets, and the K receiving channels respectively correspond to K sets of photoelectric converter sets; and a controller, configured to control the PPG circuit to operate in a partial sampling phase or an full sampling phase, so as to generates J or K biological characteristics sampling results during each of the pulse repetition cycles.

Abstract: A clock calibration method and an electronic device, for calibrating a clock of a fingerprint chip, which can improve an accuracy of the clock of the fingerprint chip, thereby improving performance of the fingerprint chip. The clock calibration method, for calibrating a clock of a fingerprint chip provided in an electronic device, includes: sending a configuration command to the fingerprint chip to cause the fingerprint chip to map a current clock of the fingerprint chip to a target pin of the fingerprint chip; detecting the target pin to acquire the current clock of the fingerprint chip; determining a calibration value based on a target clock and the current clock of the fingerprint chip; and sending the calibration value to a calibration register in the fingerprint chip, the calibration value being used to adjust the current clock of the fingerprint chip.

Abstract: An optical sensing apparatus, a method for manufacturing an optical sensing apparatus, and an electronic device can improve the optical detection accuracy and user experience. The optical sensing apparatus includes: a sensor chip configured to receive an incident light signal for optical detection; and a transparent conductive layer provided above the sensor chip and connected to a grounding terminal of the sensor chip, where the transparent conductive layer is configured to be coupled with an electromagnetic wave in an environment, and transmit the electromagnetic wave to the grounding terminal of the sensor chip.

Abstract: A pressure touch pad, a pressure touch pad assembly, and an electronic device are provided. The pressure touch pad includes a printed circuit board, a pressure sensor, a pressure sensor bracket, and a touch controller. The printed circuit board is stacked on the pressure sensor bracket, a touch electrode layer is provided on the printed circuit board, the touch electrode layer is configured to output a touch sensing signal when a finger touches the touch pad; the pressure sensor is configured to deform and output a pressure sensing signal when the finger presses the pressure touch pad; and the pressure sensor bracket includes a reinforced region, a non-reinforced region, and a flexible arm, the reinforced region is fixedly connected to the printed circuit board, the non-reinforced region is fixedly connected to an outer case, and the flexible arm is connected to the reinforced region and the non-reinforced region.

Abstract: The present disclosure provides a method for wireless communication, which is applicable to wireless communication between the active pen and the plurality of touch screens, the plurality of touch screens respectively correspond to a plurality of wireless channels, a respective wireless channel is used for wireless communication between a touch screen and the active pen, and the method includes: the active pen sends a coding signal to the first touch screen; the active pen receives a wireless signal sent by the first touch screen, the wireless signal carries identification information of the first touch screen; the active pen identifies the first touch screen that is currently close to or in contact with the active pen according to the identification information of the first touch screen; and the active pen sends a wireless message to the first touch screen through the wireless channel corresponding to the first touch screen.

Abstract: The invention discloses a method for processing image data of an image sensor, said image sensor comprises a sensor area of a pixel matrix providing image pixel data, wherein the pixel matrix comprises phase detection pixels at pre-defined locations, and wherein a set of image pixel data comprises phase detection information of said phase detection pixels, and wherein a step of calculating image pixel data for the pre-defined locations of the phase detection pixels as a function with either symmetric or asymmetric positioning of the respective phase detection in the colour channel is performed.

Abstract: An operational amplifier-based hysteresis comparator and a chip are provided. The hysteresis comparator includes: an input stage and an amplification stage. The input stage includes: a first input branch and a second input branch, where the first input branch generates a first current based on the first voltage, and the second input branch generates a second current based on the second voltage. The first current is connected with a first input terminal of the amplification stage, and the second current is connected with a second input terminal of the amplification stage. An output terminal of the amplification stage outputs a first level when the first current is greater than the second current, and outputs a second level when the first current is less than the second current. The present disclosure changes the hysteresis voltage generation mode, thereby reducing the instability caused by positive feedback.

Abstract: The present disclosure provides a method for detecting light leakage of a screen, a method for detecting ambient light, and an apparatus for detecting ambient light. The method for detecting light leakage of a screen includes: acquiring display parameters of a screen, the display parameters including: a brightness value of the screen and grayscale values of respective pixel points within a preset display region of the screen; inputting the display parameters into a pre-trained neural network model, to process the display parameters using the neural network model, to obtain light leakage values corresponding to the respective pixel points; and obtaining a light leakage value of the screen based on the light leakage values corresponding to the respective pixel points. Based on the above technical solutions, the light leakage value of the screen can be accurately and reliably determined.

Abstract: A continuous glucose monitor, comprising a housing and a circuit board arranged in the housing, wherein an electronic component is carried on the circuit board; a probe assembly configured to penetrate skin and connected to the circuit board; and an auxiliary sensor connected to the circuit board and configured to detect a compressed state of the continuous glucose monitor. The continuous glucose monitor provided in the present disclosure can identify its own compressed state, thereby improving the accuracy of glucose measurement.

Abstract: The present disclosure provides an ambient light sensor and an electronic device. The ambient light sensor includes: a light filter unit array including a red filter unit, a green filter unit, and a blue filter unit; and a pixel unit array located below the light filter unit array and including a plurality of pixel units, the plurality of pixel units being configured to receive a light signal of ambient light after passing through the display screen and the light filter unit array; the number of blue filter units is larger than the number of red filter units, and a gravity center of a pattern formed by the red filter unit, a gravity center of a pattern formed by the green filter unit, and a gravity center of a pattern formed by the blue filter unit among the plurality of light filter units coincide with each other.

Abstract: An oscillator acceleration circuit, configured to accelerate the start-up of an oscillator, wherein the oscillator has an input terminal and an output terminal. The oscillator acceleration circuit includes an inverting amplifier, a feedback resistor and an acceleration circuit; the inverting amplifier has an input terminal and an output terminal correspondingly coupled to the input terminal and the output terminal of the oscillator. The feedback resistor is coupled between the input terminal and the output terminal of the oscillator, and the acceleration circuit is coupled between the input terminal and the output terminal of the oscillator. The acceleration circuit is configured to provide a transfer function, wherein the transfer function is the same as the transfer function provided by a resistor and a capacitor connected in parallel; wherein the resistance of the resistor is less than zero.

Abstract: A transmission apparatus for laser radar, which includes: a light source including a light emitting array composed of M*N light emitting unit(s) configured for transmitting M*N beam(s) of light, where each row of the light emitting units of the light emitting array are arranged along a first direction, each column of the light emitting units of the light emitting array are arranged along a second direction; a collimating mirror configured for collimating the M*N beam(s) of light; a diffusion sheet including a first field of view in the first direction configured for converting the M*N beam(s) of light into M*N beam(s) of linear light with a first divergence angle in the first direction, and projecting the linear light to a target object to form N linear light spots parallel to the first direction, and the first field of view being equal to the first divergence angle.

Abstract: A signal driving method is provided. The method includes, in a first signal driving period, applying non-inverting and inverting drive signals respectively to M adjacent and N adjacent detection electrodes, where M+N?P; and in a second signal driving period, applying the non-inverting and inverting drive signals respectively to K adjacent and L adjacent detection electrodes, where K+L?P. P denotes a number of detection electrodes not greater than a number of detection electrodes on a touch control screen. M, N, K and L adjacent detection electrodes are all part of the P detection electrodes. One signal driving cycle includes at least the first and second signal driving periods in which drive signals are applied to P detection electrodes. Each P detection electrode is applied a non-inverting drive signal at least once in one signal driving cycle, and phases of the inverting and non-inverting drive signals are opposite to each other by 180 degrees.

Abstract: The present application provides a method, apparatus, and electronic device for detecting ambient light under a display screen, which could reduce the influence of a light leak from a screen on detection of the ambient light. The method includes: generating an interval identification signal for screen light of the display screen according to a dimming period of the display screen, the interval identification signal being used to identify the screen light that is within a specific time interval in the dimming period; performing data collection according to a sampling signal; reading data of a target sampling period from data of a plurality of sampling periods of the sampling signal according to the interval identification signal, the target sampling period being a sampling period in which sampling time overlaps with the specific time interval in time; and detecting the ambient light according to the data of the target sampling period.

Abstract: A uniform bridge gradient (UBG) time-of-flight (ToF) photodiode block is described, such as for integration with image sensor pixels. The UBG ToF photodiode block can be part of a UBG ToF pixel, and an image sensor can include an array of such pixels. Each UGB ToF photosensor block has multiple taps for selective activation, and a photodiode region designed for complete and rapid transit of photocarriers, as they are generated, via the multiple taps. Embodiments of the photodiode region include a photodiode-defining implant, a relatively shallow first bridging implant, and relatively deep second bridging implant. The bridging implants provide lateral bridging with a uniform doping gradient near and across the multiple taps.

Abstract: A time-of-flight based distance measuring method and a time-of-flight based distance measuring system are provided. The distance measuring method includes: sending N consecutive pulses from a transmitter side intermittently, N being a positive integer greater than one, wherein the N consecutive pulses are reflected by a target object, and a reflection signal is generated accordingly, during arrival of the reflected signal at a receiver side, sampling the reflected signal multiple times according to a predetermined sampling interval within a predetermined sampling duration and accordingly generating a sampling result; detecting time of flight of a single pulse of the N consecutive pulses traveling from the transmitter side to the receiver side according to the sampling result; and measuring a distance between the target object and a reference position according to the time of flight. The distance measuring method maintains good measurement quality, measures the distance rapidly, and consumes low power.

Abstract: Disclosed herein is an apparatus for detecting biometric information, including a finger stall, a pulse wave sensor, an analog front end, and a microcontroller unit. The finger stall includes a mechanical structure or a gasbag. The pulse wave sensor includes a light emitter and a photodiode. The analog front end is electrically connected to the pulse wave sensor, and is configured to receive an electrical signal and output an analog front end signal. The microcontroller unit is electrically connected to the analog front end, and is configured to receive the analog front end signal and output the biometric information, the biometric information including a blood pressure value. The apparatus for detecting biometric information can enable a miniaturization of a blood pressure measuring apparatus, facilitate offering portability for users, and achieve blood pressure monitoring for the users in a non-household environment.

Abstract: Provided is a method and apparatus for detecting a color temperature, and an electronic device, which can accurately detect a color temperature of a light source. The method includes: determining, based on multi-channel data of a to-be-tested light source and multi-channel data of a first standard light source group, proportional coefficients corresponding to the first standard light source group, where the proportional coefficients corresponding to the first standard light source group is used to represent a ratio between multi-channel data of each standard light source in the first standard light source group and the multi-channel data of the to-be-tested light source; determining a tristimulus value of the to-be-tested light source based on the multi-channel data of the first standard light source group and the proportional coefficients corresponding to the first standard light source group; and determining a color temperature of the to-be-tested light source based on the tristimulus value.

Abstract: A driver circuit arrangement for driving a load and a differential drive arrangement thereof are provided. The driver circuit arrangement employs a dual feedback configuration with a feedback resistor and a current sensor feedback arrangement. The current sensor feedback arrangement provides a current feedback path from the amplifier output to the amplifier input, and has a current sensor resistor connected in an output current path of the driver circuit arrangement. A current feedback amplifier is present connected to the current sensor resistor and to the amplifier input.

Abstract: A trench-gate source-follower (TGSF) transistor is described, such as for integration with image sensor pixels. The TGSF transistor is at least partially built into a trench etched into a substrate. A contiguous doped region is implanted around the inner walls of the trench to form a buried-trench current channel. A trench-gate is formed to have at least a buried portion that fills the volume of the trench. A gate oxide layer can be disposed between the buried portion of the trench-gate and the buried-trench current channel. Drain and source regions are formed on either end of the trench-gate. Activating the trench-gate causes current to flow between the drain and source regions via the buried-trench current channel around the buried portion of the trench-gate. The geometry of the buried-trench current channel can effectively increase the width of the active region of the source-follower transistor without increasing its physical layout width.