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: 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: 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: 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.

Abstract: Techniques are described for touch event sensing in a capacitive touch panel that is integrated with a display. In some such environments, a large amount of display noise is capacitively coupled with the touch sensing signals. This can degrade performance of conventional sensing approaches, which tend to use a buffering stage followed by a difference amplifier stage. Embodiments provide a single-stage, differential-difference-amplifier-based touch event sensing approach that pre-cancels coupled display noise from adjacent channels by common-mode rejection prior to amplifying, thereby generating amplified differential output signals that include substantially only the desired touch sensing information.

Abstract: A saddle-gate source follower transistor is described, such as for integration with in-pixel circuitry of complementary metal-oxide semiconductor (CMOS) image sensor (CIS) pixels. The saddle-gate source-follower transistor structure can include a channel region having a three-dimensional geometry defined on its axial sides by trenches. A gate oxide layer is formed over the top and axial sides of the channel region, and a saddle-gate structure is formed on the gate oxide layer. As such, the saddle-gate structure includes a seat portion extending over the top of the channel region, and first and second fender portions extending over the first and second axial sides of the channel region, such that the first and second fender portions are buried below an upper surface of the semiconductor substrate (e.g., buried into trenches formed in side isolation regions).

Abstract: A pressure detection module and an electronic device are provided. The pressure detection module is disposed between a support and an inner surface of a housing of the electronic device. The pressure detection module includes a first electrode, a second electrode, and a controller. The first electrode is fixed to an inner surface of a force input region of the housing, the second electrode is fixed to the support, and the second electrode is disposed opposite to the first electrode. The force input region of the housing is configured to drive the first electrode to move towards the second electrode based on a received external pressure. The controller is configured to determine a pressure detection result of the external pressure based on a capacitance change between the first electrode and the second electrode. The pressure detection module occupies small space in the electronic device, and is easy to mount.

Abstract: The present disclosure provides a method and system for data transmission, chip, an electronic device, and a computer readable storage medium. The method applied at a first Bluetooth end includes: establishing a point-to-point connection with a second Bluetooth end; acquiring identity information of the second Bluetooth end through the point-to-point connection; and sending broadcast isochronous group information BIGInfo to the second Bluetooth end through the point-to-point connection when the identity information of the second Bluetooth end is verified, to enable the second Bluetooth end to receive a data stream of a broadcast isochronous group BIG sent by the first Bluetooth end according to the BIGInfo.

Abstract: A capacitance detection apparatus and earphone. The capacitance detection apparatus includes a front housing and a rear housing, where the capacitance detection apparatus includes: a circuit board, a sensing electrode and a processing unit which are provided at the front housing, where the circuit board, the sensing electrode and the processing unit are integrated together; the sensing electrode is arranged in a first area of the circuit board, the processing unit is arranged in a second area of the circuit board, and the sensing electrode and the processing unit are electrically connected through a metal wiring layer in the circuit board; the sensing electrode is configured to sense a to-be-measured object and form a capacitance detection signal, the capacitance detection signal is transmitted to the processing unit through the metal wiring layer, and the processing unit is configured to process the capacitance detection signal to detect the to-be-measured object.

Abstract: The invention discloses a method for processing image data provided by an image sensor, the image data comprising an array of pixels, wherein the method comprises the steps of: a) Determining the respective local brightness difference between a selected pixel and a set of pixels located adjacent to the respective pixel and assigned to the same colour of the respective pixel; and b) Identifying the selected pixel as a defect pixel when the local brightness difference for the selected pixel exceeds an upper threshold value and/or is less than an lower threshold value, and when the local brightness difference for the selected pixel exceeds an weighted maximum local brightness difference determined for the set of pixels located adjacent to the selected pixels and/or is less than an weighted minimum local brightness difference determined for the set of pixels located adjacent to the selected pixel.

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: Embodiments of the present disclosure provide a method for updating a capacitance reference, which includes: determining, based on an n-th frame of raw capacitance data and an (n?M)-th frame of raw capacitance data outputted from the capacitance detection apparatus, a feature value corresponding to the n-th frame of raw capacitance data; computing a difference value between the n-th frame of raw capacitance data and a reference value corresponding to an (n?1)-th frame of raw capacitance data outputted from the capacitance detection apparatus, to obtain a capacitance variation; and determining, when the feature value corresponding to the n-th frame of raw capacitance data is less than a first threshold Thr1, and the capacitance variation is less than a proximity threshold Thron, the n-th frame of raw capacitance data or the (n?1)-th frame of raw capacitance data as a reference value corresponding to the n-th frame of raw capacitance data.

Abstract: An electronic device and a method for detecting an intensity of ambient light are provided. The method includes: sensing a light intensity of incident light, wherein the incident light includes ambient light passed through the display screen and light leaked from the display screen; obtaining an estimated light intensity of the light leaked from the display screen based on display data of a target region of the display screen; computing based on the estimated light intensity and a temperature compensation coefficient corresponding to a current temperature of the display screen, to obtain a light intensity of the light leaked from the display screen; and obtaining a light intensity of the ambient light passed through the display screen based on the light intensity of the incident light and the light intensity of the light leaked from the display screen.

Abstract: A voltage attack detection circuit includes: at least one voltage regulation circuit, where the at least one voltage regulation circuit is connected to an external supply respectively, the at least one voltage regulation circuit is configured to convert the external supply to at least one internal supply, and the at least one internal supply is configured to output at least one first voltage respectively; at least one voltage sensor, where the at least one voltage sensor is connected to the at least one internal supply respectively, so as to receive the at least one first voltage respectively, each voltage sensor of the at least one voltage sensor is configured to output a reference voltage based on a received reference voltage and a received first voltage, the reference voltage is configured to indicate whether a received first voltage is within a present voltage range.

Abstract: A pressure detection module and an electronic device are provided. The pressure detection module includes: a first electrode, a second electrode, a first circuit board, a second circuit board, and at least two solder fixing parts. A first surface of the first circuit board is fixed to an inner surface of a force input area of the housing. A second surface of the first circuit board is fixed to a first surface of the first electrode. A first surface of the second circuit board is fixed to a second surface of the second electrode. Two end sides of the second surface of the first circuit board and two end sides of the first surface of the second circuit board are disposed opposed to each other through the at least two solder fixing parts. Thereby, the pressure detection module does not require a bracket and has a small thickness.

Abstract: A touchpad includes a touch assembly and a support assembly. The touch assembly is disposed on the support assembly. The support assembly includes: a main support component, disposed at an edge of a bottom surface of the touch assembly; a fixed platform, on which a boss is integrally formed; and first and second elastic components, where the first and second elastic components are symmetrically connected to the main support component along a plane in which the main support component is located, an opening for accommodating the fixed platform is formed between the first and second elastic components, the fixed platform is connected between the first and second elastic components, and the support assembly has a sheet-like structure; and a travel switch is disposed on the bottom surface of the touch assembly, and the boss is configured to touch and trigger the travel switch when the touch assembly is pressed.

Abstract: A wearing state detection method, a wearing state detection device, and a wearable device are provided. The method detects a wearing state of the wearable device and includes: emitting, by the light emitting unit, light of at least two different wavelengths to a subject in a time division manner; receiving, by the light receiving unit, reflected light corresponding to light of each wavelength after being reflected by the subject; obtaining intensity of reflected light corresponding to the light of each wavelength respectively; calculating a fluctuation range of a light intensity ratio, which is a ratio between intensity of the reflected light corresponding to light of the at least two different wavelengths received by a same light receiving unit; and determining that the device is in a wearing state when the fluctuation range is greater than or equal to a first threshold.