Abstract: The present disclosure relates to the field of Internet of Things, and in particular, to an online upgrade method and apparatus for a Bluetooth cluster. The online upgrade method for the Bluetooth cluster includes: an upgrade device selects a central node in the Bluetooth cluster and establishes a Bluetooth connection with the central node; the upgrade device selects an upgrade path, and sends upgrade data to a to-be-upgraded device through the central node according to the upgrade path, enabling the to-be-upgraded device to obtain the upgrade data to achieve an upgrade, where the to-be-upgraded device includes a part or all of Bluetooth devices in the Bluetooth cluster. The online upgrade method of the Bluetooth cluster adopted in the present disclosure further broadens a communication range of the Bluetooth, which requires no one-to-one operation by a user.

Abstract: The present application provides an optical fingerprint apparatus and an electronic device, which could reduce a thickness of the optical fingerprint apparatus. The optical fingerprint apparatus is applied to an electronic device having a display screen and configured to be disposed under the display screen, and the optical fingerprint apparatus comprises: an optical fingerprint chip configured to receive a fingerprint detecting signal, wherein the fingerprint detecting signal is used to detect fingerprint information of a finger; and a filter structure, wherein the filter structure is deposited or sputtered on the optical fingerprint chip.

Abstract: The application discloses a signal generation circuit (100), configured to generate a transmission signal to trigger a first transducer to generate a first transducer output signal; the signal generation circuit includes: a signal generation unit (106), configured to generate an output signal; and a transmitter (104), coupled to the signal generation unit, wherein the transmitter is configured to convert the output signal into the transmission signal; wherein the transmission signal includes a data signal and a compensation signal, the data signal includes at least one first pulse wave, the compensation signal includes at least one second pulse wave, the first pulse wave and the second pulse wave have opposite phases, and the first pulse wave has an other waveform parameter different from an other waveform parameter of the second pulse wave. The present application further provides a related chip, a flow meter and a method.

Abstract: An adjuster includes a power transfer circuit, a negative feedback circuit, a constant current source circuit and a control circuit. Two inputs of an error amplifier in the negative feedback circuit receive a reference voltage and a feedback voltage corresponding to an output signal of the adjuster respectively, and the error amplifier is configured to output a first voltage signal when the feedback voltage is less than the reference voltage, and output a second voltage signal when the feedback voltage is greater than the reference voltage, during the starting process of the adjuster. The control circuit is configured to control the negative feedback circuit to be turned off and the constant current source circuit to be turned on, and control the constant current source circuit to be turned off and the negative circuit to be turned on according to the second voltage signal.

Abstract: The present disclosure provides an image sensor including a substrate (400) and at least one pixel unit. The pixel unit comprises a photodetector (401) arranged in the substrate, a photosensitive surface of the photodetector facing a back surface of the substrate to generate a charge upon receiving an incident light from the back surface of the substrate, a spherical crown structure (406) arranged on the substrate and located on an opposite surface of the photosensitive surface, a conformal dielectric layer (420) arranged on the spherical crown structure and used to generate a dielectric-layer reflective light when the incident light reaches the conformal dielectric layer, and a reflective layer (430) arranged on the conformal dielectric layer and used to generate a reflective-layer reflective light when the incident light reaches the reflective layer. In this way, an absorption ratio for the incident light is increased, thereby improving signal quality of an image.

Abstract: Some embodiments of the present application provide a method for registering a fingerprint, a terminal, and a computer readable storage medium. The method for registering a fingerprint includes: acquiring fingerprint images collected in response to a user sliding a finger; filtering the fingerprint images to select filtered images that satisfy a preset filtering condition; and registering the filtered images into a fingerprint template. Thus, the user can register the fingerprint by sliding the finger, without pressing a number of times, which improves user experience and helps to enhance identification performance.

Abstract: Embodiments of the present application provide a biological feature detection apparatus. The detection apparatus includes: a light emitting unit and a light receiving unit. The light emitting unit is configured to emit light to a detection surface of a biological tissue, the light emitted by the light emitting unit being processed by the biological tissue and then transmitted to the light receiving unit, the light receiving unit is configured to receive the light and perform a photoelectric conversion to generate an original electrical signal for biological feature detection, and at least one of the adjustable relative position and relative angle is defined between the light emitting unit and the light receiving unit. As such, accurate monitoring of the biological feature is achieved.

Abstract: Embodiments of this application disclose a method for managing a power supply state of a memory and a chip, where the memory includes a plurality of storage areas, and the plurality of storage areas are separately powered by an independent power supply. The method includes: determining an occupancy condition of the plurality of storage areas by a program according to allocation address information of a segment, in the program, to be stored in the plurality of storage areas; and configuring a power supply state of the plurality of storage areas according to the occupancy condition of the plurality of storage areas by the program.

Abstract: Provided are a pixel circuit and an associated image sensor, including an inverting input circuit, an active load and a signal reading circuit. Each pixel circuit includes a light sensing component, a transmission switch, a reset switch and a unity gain buffer. The transmission switch is series-connected between the light sensing component and the transmission switch. The unity gain buffer is connected to a node of connection of the transmission switch and the reset switch. The signal read circuit reads a sensing signal of the light sensing component through the unity gain buffer. An output signal of the unity gain buffer varies with an input signal of the unity gain buffer, attaining a linear relationship between the output signal and the input signal. Therefore, the photoelectric conversion curve of each pixel circuit is linear.

Abstract: Some embodiments of the present disclosure relate to electronic technologies, and provide a detection circuit. According to embodiments of the present disclosure, the detection circuit includes a first load module, a second load module, a third load module, a first detection module, a second detection module, and an obtaining module. A first end of the first detection module is connected to a junction between a first detection electrode and the first load module, a second end of the first detection module is connected to the obtaining module, a first end of the second detection module is connected to a junction between a second detection electrode and the second load module, and a second end of the second detection module is connected to the obtaining module.

Abstract: Provided is a reverse current switch. The reverse current switch includes: a comparison unit including a first input end, a second input end, and a first output end; and a switch resistance unit, where a first end of the switch resistance unit is connected to the first input end, a second end of the switch resistance unit is connected to the second input end, and a third end of the switch resistance unit is connected to the output end of the comparison unit, and the switch resistance unit is controlled by a voltage of the first output end. This reverse current switch has a simple structure and can implement working under low voltage conditions.

Abstract: Some embodiments of the present disclosure provide a method for transmitting and receiving a signal, a processor chip, an active stylus, and a touch screen. The method for transmitting a signal includes: acquiring, based on detected pressure information, codes representing pressure information and used to detect tip positions, where the code includes n code bits, n being an integer greater than 1; generating n coded signals respectively corresponding to the n code bits; and transmitting each coded signal in the coded signals at the preset first or second frequency or prohibiting transmission of each coded signal in the coded signals, where the first frequency, the second frequency and prohibited transmission of the n coded signals relate to the pressure information.

Abstract: The application discloses a time-to-digital conversion circuit (100) including a first oscillator (110), a second oscillator (120), a first counting circuit (130), a second counting circuit (140), a first conversion circuit (150) and a processing circuit (160). The first oscillator is activated by a first signal and includes oscillating units having a first delay amount, wherein the first counting circuit is configured to count a number of times that the first tail end output signal of the first oscillator changes and store the same as a first counting result; the second counting circuit counts a number of oscillating units with an output change, other than the first tail end oscillating unit and stores the same as a second counting result; the first conversion circuit generates a first conversion signal according to the first counting result and the second counting result; the processing circuit generates the output signal at least according to the first conversion signal.

Abstract: Provided are a link processing method, a device and a storage medium. The method is applied in a network including a first device and two or more second device, where the first device is communicatively connected with the second devices via independent links. The method includes: the first device sending a connection parameter updating request to at least one of the second devices; determining a moving position of a link anchor point according to an instantaneous reference point and a window moving distance when the second device confirms the connection parameter updating request; and adjusting a connection parameter of the link according to the moving position of the link anchor point.

Abstract: Techniques are described for real-time disparity upsampling for phase detection autofocus (PDAF) in digital imaging systems. For example, an imaging sensor array includes a number of physical PDAF sensors that provide a PDAF resolution that is a small percentage of the resolution of the imaging sensor itself. The PDAF resolution is upsampled without relying on adding physical PDAF sensors by generating simulated PDAF sensors at upsampling locations. For each upsampling location, embodiments can compute local disparity values and local contrast values for each of multiple neighboring physical PDAF sensors. An upsampled disparity value can be computed for the upsampling location by weighting the neighboring local disparity values based at least on the neighboring local contrast values. The upsampled disparity values can yield higher-resolution information for use in PDAF operations.

Abstract: A method of detecting a touch point and a touch controller is disclosed. The method includes: a touch detection mode is determined according to a first result at an initial time of a detection period (S110), the first result being a touch detection result corresponding to an adjacent detection period prior to the detection period; and a touch point on a touch screen is detected in the touch detection mode (S120), where the touch detection mode includes a single-finger touch detection mode and a multi-finger touch detection mode. A method of detecting a touch point could achieve a balance between power consumption and response speed, and accordingly, improve user experience.

Abstract: Some embodiments of the present disclosure provide a positive and negative voltage driving circuit. The positive and negative voltage driving circuit includes: a positive and negative voltage generating module and a control module. The positive and negative voltage generating module includes a switch module. The control module is configured to control a turn-off state and a turn-on state of the switch module to enable the positive and negative voltage generating module to output a positive voltage and a negative voltage to a stylus tip of an active stylus. The positive and negative voltage driving circuit of the embodiments of the present disclosure can significantly reduce the driving power consumption of the active stylus while ensuring driving effects.

Abstract: A chip package structure and an electronic equipment may reduce probability of short circuit failure during chip packaging and improve chip reliability. The chip package structure includes: a chip, a substrate, and a lead; the chip is disposed above the substrate; wherein the chip includes a pin pad and a test metal key, and the lead is configured to electrically connect the pin pad and the substrate; the test metal key is disposed in an edge region of the chip that is not under the lead.

Abstract: A method for pressure calculation and an apparatus thereof, an electronic device and a touch system are provided. The method for pressure calculation includes: sampling, within a preset sampling period, a phase-encoded driving signal that is continuously provided to obtain a sampled driving signal; and calculating pressure data within the sampling period according to a phase difference between adjacent frames of the sampled driving signal within the sampling period. By using the method for pressure calculation, a report rate is increased, handwriting follow ability is further improved, and handwriting experience is improved.

Abstract: An image sensor includes a pixel array having a plurality of pixels arranged in rows and columns, a plurality of pixel readout lines coupled to respective pixels, a multiplexing circuit coupled to the pixel readout lines, a plurality of analog-to-digital converters coupled to the multiplexing circuit, and a controller configured to provide pixel readout signals of pixels arranged in a same column to the analog-to-digital converters through the multiplexing circuit for concurrent signal conversion.