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 voltage attack detection circuit includes at least one voltage regulation circuit, at least one voltage sensor and at least one glitch sensor. The at least one voltage sensor is configured to receive at least one first voltage output by the at least one voltage regulation circuit respectively, and output at least one first signal respectively. The at least one first signal is configured to indicate whether it is under voltage attack of a duration in a first range and an attack strength in a second range respectively. The at least one glitch sensor is configured to receive at least one first voltage respectively, and configured to output at least one second signal respectively. The at least one second signal is configured to indicate whether it is under voltage attack of a duration in a third range and an attack strength in a fourth range.
Abstract: A voltage attack detection circuit of a chip includes: a first programmable resistor and a second programmable resistor, a first terminal of the first programmable resistor is connected to a supply voltage, a second terminal of the first programmable resistor is connected to a ground voltage through the second programmable resistor, the first terminal outputs a first voltage, the second terminal outputs a second voltage; a voltage detection circuit, receives the first voltage and a first reference voltage and output a first signal, where the first signal is configured to indicate whether the first voltage is greater than or equal to the first reference voltage, the voltage detection circuit is further configured to receive the second voltage and a second reference voltage and output a second signal, and the second signal is configured to indicate whether the second voltage is less than or equal to the second reference voltage.
Abstract: A method and an apparatus for pressure detection, an active pen, a touch control chip and an electrode device are provided, configured to detect a pressure of the active pen on a screen. The active pen includes a pressure sensor, a wireless communication module and a tip electrode, and the pressure sensor is configured to detect the pressure generated by the active pen. The method includes: determining a second pressure level corresponding to the pressure, according to a detection signal corresponding to a first driving signal output by the tip electrode, when a pressure signal of a first pressure level corresponding to the pressure sent by the wireless communication module is not received; and displaying handwriting of the active pen, by the screen, according to the second pressure level. The method can reduce time delay of a response of a first writing of the active pen.
Abstract: Provided are a capacitance detecting circuit, a touch control chip, a touch detection apparatus and an electronic device. The capacitance detecting circuit, by configuring a first input side of an operational amplifier as a preset voltage, and utilizing the same characteristics of voltages at two input sides of the operational amplifier, enables that an output voltage in a touch sensor is configured as a preset voltage by a second input side of the operational amplifier, and by changing a position of a drive of a coding voltage, mutual-capacitance and self-capacitance detection can be realized with the same circuit. After replicating a single-channel current signal output by the operational amplifier into a multi-channel current signal, a current subtracting circuit is used to determine a differential signal of current signals output by two adjacent channels, and the differential signal is converted into a voltage through a charge amplifying circuit.
Abstract: Provided are a fingerprint identification apparatus and an electronic device, and the fingerprint identification apparatus is applied to an electronic device having a display screen. The fingerprint identification apparatus comprises: a support plate used to fixedly connect with a middle frame of the electronic device; and at least one fingerprint sensor chip disposed on an upper surface of the support plate and disposed under the display screen through the support plate; wherein the at least one fingerprint sensor chip is configured to receive a fingerprint detecting signal returned by reflection or scattering via a human finger on the display screen, wherein the fingerprint detecting signal is used to detect fingerprint information of the finger.
Abstract: A capacitance detection circuit, a touch control chip and an electronic device can effectively extract a capacitance change without increasing costs of a circuit. The capacitance detection circuit includes: a CCA circuit, a first input end and a second input end of the CCA circuit are connected to a capacitance to be measured and a cancellation capacitance, respectively, a third input end of the CCA circuit is connected to a coding voltage, and a first output end and a second output end of the CCA circuit output a first current and a second current, respectively, where the cancellation capacitance is smaller than an initial value of the capacitance to be measured; a PGA circuit, two input ends of the PGA circuit are connected to two output ends of the CCA circuit, respectively.
Abstract: Technology for devices, systems, techniques and processes to provide anti-spoofing features for facial identification with enhanced security against facial spoofing devices or technique by using optical sensing and other sensing mechanisms to explore certain unique characteristics of a face of a live person that lack in most spoofing devices made of artificial materials or are difficult to replicate, including optical sensing based on unique optical absorption or reflection features of biological parts of a person's face.
Abstract: A single communication interface between a master device and at least one slave device and a method with internal/external addressing mode using the single communication interface. In the single communication interface between a master device and at least one slave device, the master device includes a master interface and the slave device comprises a slave interface and a slave bus-system, whereas the slave interface is directly connected to the slave bus-system, wherein the master interface and the slave interface communicate on a packet based protocol by an internal and external addressing mode inside the slave interface, whereas the addressing mode, data transfer direction and data address location are coded by the packet based protocol inside a first 32-bit word of each transmission between the master device and slave device over the single communication interface.
Abstract: The disclosure discloses a method for predictive reception of physical layer downlink repetitions in NB-IoT UE. The object of the disclosure to find a method that prolongs the battery lifetime of IoT devices will be achieved by a method for predictive reception of physical layer downlink repetitions in NB-IoT devices, the method comprising the following steps: estimating an expected number of repeated sub-frames required for a successful reception of a current encoded and in sub-frames rate-matched downlink transmission from a base station to an IoT device by applying a redundancy estimation function, using the estimated expected number of repeated sub-frames as input of a repetition reception control function, where a feedback-loop between the redundancy estimation function and the repetition reception control function is used for refining and adapting the predictive reception of physical layer downlink repetitions in NB-IoT.
Abstract: A one-button power-on processing method and a terminal thereof are provided. The method includes: judging whether pressing a power button at a current time triggers one-button power-on of a terminal when it is detected that the power button is pressed at the current time; and sending the biometric feature data acquired by the biometric feature identification module to an operating system of the terminal for one-button power-on processing if pressing the power button at the current time triggers one-button power-on of the terminal. In this way, the terminal is powered on by a user by performing the press operation once. This enhances convenience, and effectively improves user experience of the terminal.
Abstract: An optical fingerprint sensing module is configured to be disposed under a display screen that includes an array of LEDs. The optical fingerprint sensing module includes a light coupler disposed under the display screen, an array of light collimators coupled to the light coupler, a photodetector array, electronic circuitry coupled to the photodetector array, and a processor. The processor is configured to cause the electronic circuitry to capture a first frame while a first plurality of LEDs in the display screen are turned on and a second plurality of LEDs are turned off, and capture a second frame while the first plurality of LEDs are turned off and the second plurality of LEDs are turned on. The processor is further configured to construct a first fingerprint image and a second fingerprint image by combining the first frame and the second frame.
Abstract: An apparatus includes a hybrid adaptive active noise control unit (HAANCU) configured to provide an anti-noise signal to an ear speaker from a reference noise signal of a reference microphone and an error signal of an error microphone, a decimator configured to decimate the reference noise signal and error signal, an adaptive hybrid ANC training unit (AHANCTU) including at least one noise cancellation filter and a filter configured to provide a feedback signal to the at least one noise cancellation, which trains parameters of the AHANCTU based on the decimated reference noise signal, the decimated error signal, and the feedback signal. The apparatus further includes a rate conversion unit configured to up-sample the parameters and update the HAANCU with the up-sampled parameters.
Abstract: The present disclosure relates to the field of touch technologies, and in particular, to a capacitance detection circuit, a capacitance detection method, a touch chip, and an electronic device. The capacitance detection circuit includes: a control module, a charge transfer module, a processing module, a drive module, and a cancellation module. The control module is configured to control the drive module to charge a capacitor to be detected. The cancellation module is configured to perform M times of charge cancellations on the capacitor to be detected. The charge transfer module is configured to convert a charge of the capacitor to be detected, subject to the M times of charge cancellations, to generate an output voltage. The processing module is configured to determine, according to the output voltage, a capacitance variation of the capacitor to be detected.
Abstract: A transmitter circuit includes a phase locked loop circuit, having one or more operational characteristics indicative of an operating state of the phase locked loop circuit. The phase locked loop circuit is configured to generate a frequency signal. The transmitter circuit also includes a power amplifier configured to selectively drive an antenna with a drive signal according to the frequency signal, and a programmable delay circuit configured to controllably extend a propagation delay between the frequency signal and the drive signal of the power amplifier. The programmable delay circuit is programmed such that a first value of a particular operational characteristic of the phase locked loop circuit is substantially equal to a second value of the operational characteristic of the phase locked loop circuit. The first value is measured with the power amplifier not driving the antenna. The second value is measured with the power amplifier driving the antenna.
November 27, 2020
Date of Patent:
December 21, 2021
SHENZHEN GOODIX TECHNOLOGY CO., LTD.
Ahmed Emira, Faisal Hussien, Esmail Babakrpur Nalousi
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: A method for preventing a misoperation on an edge of a touch screen includes: determining a first touch region according to touch operation on an edge of a touch screen; forming a second touch region according to coordinate information of touch points in the first touch region; forming a third touch region according to a longest column in the second touch region and a column on a left side of the longest column if the touch points in the second touch region are arranged as parallel to a right edge of the touch screen; judging whether a length-to-width ratio of the third touch region is less than or equal to a predetermined threshold; and determining that the touch operation is a misoperation if the length-to-width ratio is greater than the predetermined threshold.
Abstract: Provided is an apparatus for fingerprint detection, where the apparatus includes a sensor chip array and an MCU, the sensor chip array includes a first chip set in which chips multiplex a first signal line and a second chip set in which chips multiplex a second signal line, where the chips in the first chip set and the chips in the second chip set are alternately arranged in each row and each column, and the MCU is configured to: control one first chip in the first chip set to perform fingerprint detection on a finger on the display screen at a time; and/or, control one second chip in the second chip set to perform fingerprint detection on the finger at the time.
Abstract: Provided are an optical fingerprint apparatus and an electronic device, applied to an electronic device having a display screen, where the optical fingerprint apparatus is configured to be disposed under the display screen, and the optical fingerprint apparatus includes: an optical fingerprint chip, where the optical fingerprint chip is configured to receive a fingerprint light signal returned from a finger above the display screen, and the fingerprint light signal is used to obtain a fingerprint image of the finger; and a light blocking layer formed on an upper surface of an edge region of the optical fingerprint chip, where the light blocking layer partially blocks the edge region of the optical fingerprint chip and does not block a sensing region of the optical fingerprint chip, and the light blocking layer is configured to block interference light entering the sensing region from the edge region of the optical fingerprint chip.
Abstract: A fingerprint detection apparatus and a terminal device having a fingerprint identification function are disclosed. The terminal device includes: a glass cover, configured to provide a touch interface; a liquid crystal panel, located below the glass cover; a backlight module, located below the liquid crystal panel; and a light-emitting component, located below the glass cover, wherein the light-emitting component and the liquid crystal panel are staggered from each other, and the light-emitting component is configured to emit a light to illuminate the finger to generate a returned light, wherein the returned light is used for the terminal device to perform the fingerprint identification on the finger.