Abstract: A photographing apparatus includes a shape memory alloy (SMA) motor, an image sensor, a lens, and a controller. The SMA motor includes an SMA wire. The SMA wire is configured to deform to drive the lens to move. The controller is configured to output a pulse signal. The pulse signal includes a drive signal and a detection signal. The drive signal is used to cause the SMA wire to deform. The detection signal is used to detect deformation of the SMA wire. N times a pulse signal cycle is equal to a time difference between the first time of sampling and the second time of sampling in correlated double sampling of the image sensor.

Abstract: Embodiments of this application disclose a battery leakage current check method, apparatus, and circuit, and relate to the battery field, so as to check for a leakage current inside a battery. The battery leakage current check method includes: when a power adapter supplies power to an electronic device, controlling the battery to stop supplying power to the electronic device; obtaining a voltage parameter and a duration parameter, where the voltage parameter is a difference between voltages of the battery at two different moments, and the duration parameter is duration between the two different moments; and determining, based on the voltage parameter and the duration parameter, whether a leakage parameter of the battery meets a preset condition. The embodiments of this application are applied to battery leakage current check.

Abstract: A circuit for detecting a button action on an earphone, including a first resistor, a comparator having with a first input end, a second input end, and an output end, with the first input end of the comparator connected to the first end of the first resistor, and the second input end of the comparator connected to the second end of the first resistor. A power supply us connected to the first resistor. The earphone includes a second resistor, and when the earphone is connected to the circuit, the second resistor is connected to the first resistor. The earphone further includes a microphone having a first end connected to the first end of the second resistor and a second end grounded, and a button having ends that are respectively connected the microphone and the second resistor. When the button is pressed, the ends of the button are connected.

Abstract: Embodiments of the present invention provide a method, an apparatus, and a system for supplying power to an active noise reduction headset The method for supplying power to an active noise reduction headset includes: receiving a signal of first voltage transmitted by the terminal; processing the signal of the first voltage to obtain a signal of second voltage, where the second voltage is less than the first voltage, and the signal of the second voltage is transmitted to a noise reduction chip of the active noise reduction headset, so that the noise reduction chip of the active noise reduction headset acquires the signal of the second voltage to implement a noise reduction function. The method, apparatus, and system for supplying power to an active noise reduction headset provided in the embodiments of the present invention are used to supply power to the active noise reduction headset.

Abstract: A headphone socket that includes: a headphone socket body and a spring plate part; the spring plate part is clamped into the headphone socket body, and the spring plate part includes: a microphone spring plate, a grounded spring plate, a right-earpiece spring plate, a charging detection availability identifying spring plate, a headphone availability detection spring plate, and a left-earpiece spring plate; and when a headphone plug of headphones is completely inserted into the headphone socket, the charging detection availability identifying spring plate is in contact with a right-channel terminal of the headphone plug, so as to conduct a connection between the right-channel terminal and an external circuit, so that a device at which the headphone socket is located charges the headphones by using the microphone spring plate that is in contact with a microphone terminal of the headphone plug.

Abstract: A headphone socket that includes: a headphone socket body and a spring plate part; the spring plate part is clamped into the headphone socket body, and the spring plate part includes: a microphone spring plate, a grounded spring plate, a right-earpiece spring plate, a charging detection availability identifying spring plate, a headphone availability detection spring plate, and a left-earpiece spring plate; and when a headphone plug of headphones is completely inserted into the headphone socket, the charging detection availability identifying spring plate is in contact with a right-channel terminal of the headphone plug, so as to conduct a connection between the right-channel terminal and an external circuit, so that a device at which the headphone socket is located charges the headphones by using the microphone spring plate that is in contact with a microphone terminal of the headphone plug.

Abstract: A circuit for detecting a button action on an earphone, including a first resistor, a comparator having with a first input end, a second input end, and an output end, with the first input end of the comparator connected to the first end of the first resistor, and the second input end of the comparator connected to the second end of the first resistor. A power supply us connected to the first resistor. The earphone includes a second resistor, and when the earphone is connected to the circuit, the second resistor is connected to the first resistor. The earphone further includes a microphone having a first end connected to the first end of the second resistor and a second end grounded, and a button having ends that are respectively connected the microphone and the second resistor. When the button is pressed, the ends of the button are connected.

Abstract: Embodiments of the present invention provide a method, an apparatus, and a system for supplying power to an active noise reduction headset The method for supplying power to an active noise reduction headset includes: receiving a signal of first voltage transmitted by the terminal; processing the signal of the first voltage to obtain a signal of second voltage, where the second voltage is less than the first voltage, and the signal of the second voltage is transmitted to a noise reduction chip of the active noise reduction headset, so that the noise reduction chip of the active noise reduction headset acquires the signal of the second voltage to implement a noise reduction function. The method, apparatus, and system for supplying power to an active noise reduction headset provided in the embodiments of the present invention are used to supply power to the active noise reduction headset.

Abstract: A terminal and a system capable of reducing noise generated in a process of plugging or unplugging an earphone. The terminal includes: an earphone socket, a switch circuit, an earphone power supply circuit, and a bleeder circuit, where a first pin of the earphone socket is connected to a control pin of the switch circuit, a second pin of the earphone socket is connected to an input terminal of the switch circuit, a first output terminal of the switch circuit is connected to the earphone power supply circuit, and a second output terminal of the switch circuit is connected to the bleeder circuit.

Abstract: Embodiments of the present invention relate to the field of electronic products and provide a method, an apparatus, and a system for supplying power to an active noise reduction headset, which can resolve a problem that a power supply operation of the active noise reduction headset is highly complex. The method for supplying power to an active noise reduction headset includes: receiving a signal of first voltage transmitted by a terminal; processing the signal of the first voltage to obtain a signal of second voltage, where the second voltage is less than the first voltage, and the signal of the second voltage is transmitted to a noise reduction chip of the active noise reduction headset, so that the noise reduction chip of the active noise reduction headset obtains the signal of the second voltage to implement a noise reduction function.