Abstract: A stylus includes a touch element, a main control module configured to change thickness of handwriting on a touch screen, and a blocking element configured to limit a movement of the touch element. The touch element is elastically connected to the blocking element, and a head of the touch element forms a nib. The stylus further includes a magnetic component moving with a movement of the nib, and a detection module configured to detect a value of magnetic field intensity of the magnetic component. The magnetic component and the detection module are spaced from each other. The detection module is electrically connected to the main control module, and the value of writing force that the touch element is applied to the touch screen is in a preset proportion to the value of magnetic field intensity of the magnetic component detected by the detection module.

Abstract: A boost circuit includes: an inductor, a switch module, a capacitor and a control module. The switch module includes at least a first switch and a second switch. The capacitor and the second switch are connected in parallel. A first terminal of the first switch is connected to one terminal of the inductor. A second terminal of the first switch is connected to a first terminal of the second switch. A second terminal of the second switch is grounded. The other terminal of the inductor is configured to connect a power supply. The control module is connected to a control terminal of the switch module. The control module is configured to control states of the switches in the switch module, to enable the first terminal of the second switch to output a voltage signal with a preset frequency and amplitude.

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: 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: Disclosed is a fingerprint identification sensor, which comprises: a sensor unit, comprising a capacitor array formed by a plurality of capacitor induction units and having an output, a power supply and a sensor ground output; a conversion circuit, connected to the device ground of the terminal device, and the output and the sensor ground of the sensor unit, and configured to, upon modulating the driving signal to the modulated signal, output the modulated signal to the sensor ground; an energy storage capacitor, connected between the power supply and the sensor ground, and configured to stabilize an operating voltage of the sensor unit; a high-speed transistor switch, connected to the power supply, and configured to perform synchronous switch-on and switch-off according to status of the conversion circuit power supply; and a power supply, connected to the conversion circuit and the power supply of the sensor unit via the high-speed transistor switch.

Abstract: A boost circuit includes: an inductor, a switch module, a capacitor and a control module. The switch module includes at least a first switch and a second switch. The capacitor and the second switch are connected in parallel. A first terminal of the first switch is connected to one terminal of the inductor. A second terminal of the first switch is connected to a first terminal of the second switch. A second terminal of the second switch is grounded. The other terminal of the inductor is configured to connect a power supply. The control module is connected to a control terminal of the switch module. The control module is configured to control states of the switches in the switch module, to enable the first terminal of the second switch to output a voltage signal with a preset frequency and amplitude.

Abstract: Disclosed is a fingerprint identification sensor, which comprises: a sensor unit, comprising a capacitor array formed by a plurality of capacitor induction units and having an output, a power supply and a sensor ground output; a conversion circuit, connected to the device ground of the terminal device, and the output and the sensor ground of the sensor unit, and configured to, upon modulating the driving signal to the modulated signal, output the modulated signal to the sensor ground; an energy storage capacitor, connected between the power supply and the sensor ground, and configured to stabilize an operating voltage of the sensor unit; a high-speed transistor switch, connected to the power supply, and configured to perform synchronous switch-on and switch-off according to status of the conversion circuit power supply; and a power supply, connected to the conversion circuit and the power supply of the sensor unit via the high-speed transistor switch.

Abstract: Disclosed is a fingerprint identification sensor, which comprises: a sensor unit, comprising a capacitor array formed by a plurality of capacitor induction units and having an output, a power supply and a sensor ground output; a conversion circuit, connected to the device ground of the terminal device, and the output and the sensor ground of the sensor unit, and configured to, upon modulating the driving signal to the modulated signal, output the modulated signal to the sensor ground; an energy storage capacitor, connected between the power supply and the sensor ground, and configured to stabilize an operating voltage of the sensor unit; a high-speed transistor switch, connected to the power supply, and configured to perform synchronous switch-on and switch-off according to status of the conversion circuit power supply; and a power supply, connected to the conversion circuit and the power supply of the sensor unit via the high-speed transistor switch.

Abstract: A stylus includes a touch element, a main control module configured to change thickness of handwriting on a touch screen, and a blocking element configured to limit a movement of the touch element. The touch element is elastically connected to the blocking element, and a head of the touch element forms a nib. The stylus further includes a magnetic component moving with a movement of the nib, and a detection module configured to detect a value of magnetic field intensity of the magnetic component. The magnetic component and the detection module are spaced from each other. The detection module is electrically connected to the main control module, and the value of writing force that the touch element is applied to the touch screen is in a preset proportion to the value of magnetic field intensity of the magnetic component detected by the detection module.

Abstract: A fingerprint module includes a fingerprint sensor, a metal decorative part, a touch detection circuit, and a processing unit. The touch detection circuit generates a first trigger signal when the metal decorative part is touched; the processing unit is connected to the touch detection circuit and the fingerprint sensor; the processing unit generates a finger touch signal when the first trigger signal generated by the touch detection circuit and/or the fingerprint sensing signal generated by the fingerprint sensor is received. The present application also provides a control method of fingerprint module. In the present application, the metal decorative part and the fingerprint sensor are cooperatively used for performing a joint detection and the overall detection range of the fingerprint module is increased, thereby reducing the detection blind area of a finger and improving the detection accuracy of the fingerprint module for realizing a touch detection function.

Abstract: Disclosed is a fingerprint identification sensor, which comprises: a sensor unit, comprising a capacitor array formed by a plurality of capacitor induction units and having an output, a power supply and a sensor ground output; a conversion circuit, connected to the device ground of the terminal device, and the output and the sensor ground of the sensor unit, and configured to, upon modulating the driving signal to the modulated signal, output the modulated signal to the sensor ground; an energy storage capacitor, connected between the power supply and the sensor ground, and configured to stabilize an operating voltage of the sensor unit; a high-speed transistor switch, connected to the power supply, and configured to perform synchronous switch-on and switch-off according to status of the conversion circuit power supply; and a power supply, connected to the conversion circuit and the power supply of the sensor unit via the high-speed transistor switch.