Abstract: A method and apparatus for detecting a wearing state of a smart wearable device, which utilizes the characteristic that there is a difference in the reflection of infrared rays having different light intensities by different objects, acquires a first effective mean value of light intensities of reflection signals of a first infrared ray and a second effective mean value of light intensities of reflection signals of a second infrared ray, and judge the wearing state of the smart wearable device by the difference between the first and second effective mean values, thereby avoiding misjudgment caused by judging the wearing state by distance and misjudgment caused by judgment conditions such as temperature difference and capacitance difference which are greatly affected by the surrounding environment. The reflection signals of two infrared rays having different light intensities are used in comparing, which improves the accuracy of judgment.

Abstract: An adjusting apparatus and a head-mounted display device, which includes: a runner, an interpupillary distance adjusting component and an object distance adjusting component; where, the interpupillary distance adjusting component includes: a first screw, and an interpupillary distance adjusting actuator engaged with the first screw; the object distance adjusting component includes: a second screw, and an object distance adjusting actuator engaged with the second screw; a through hole is formed on a center of the runner, the through hole, and the first screw and the second screw are coaxial; when the runner moves onto the first screw, the runner is connected with the first screw through a connection structure, and the runner drives the first screw to rotate together; when the runner moves onto the second screw, the runner is connected with the second screw through a connection structure, and the runner drives the second screw to rotate together.

Abstract: An optical system includes a reflecting-mirror group having a focal-power reflecting face and a free-form-surface-prism group. the latter includes an imaging prism. The focal-power reflecting face of the reflecting-mirror group is configured to reflect part of incident light ray to a first light entering face of the imaging prism. The first light entering face is configured to transmit part of the incident light ray to a second light entering face of the imaging prism. The second light entering face is configured to reflect part of light ray from the first light entering face to a third light entering face of the imaging prism. The third light entering face is configured to reflect part of light ray from the second light entering face to a light exiting face of the imaging prism. An intermediate imaging plane is formed in an optical path before the third light entering face.

Abstract: Provided are an unlocking method and a virtual reality device, including displaying A candidate icons, the A candidate icons including M password icons related to latest operations; in response to an operation of selecting an unlocking icon from the A candidate icons, acquiring the selected unlocking icon; and performing an unlocking operation according to the selected unlocking icon and the M password icons related to the latest operations. According to the unlocking method and apparatus provided by the embodiments of the present invention, by setting password icons related to latest operations, passwords can be updated in real time, so that the passwords are not easy to crack, and it is unnecessary to repeatedly and manually set the passwords.

Abstract: A VR headset and a method for controlling a VR headset are provided. The VR headset comprises a wakeup/sleep control circuit, at least one pressure sensor and at least one distance sensor, the pressure sensor and the distance sensor each being electrically connected with the wakeup/sleep control circuit, wherein the pressure sensor is provided at an upper frame and/or a lower frame of the VR headset, and the distance sensor is provided at an inner side of the VR headset, the inner side of the VR headset referring to a side of the VR headset that is adjacent to a face of a user wearing the VR headset. The VR headset provides a hardware basis for an automatic wakeup/sleep control of the VR headset.

Abstract: A power system for audio device comprises a mobile terminal and an audio device, wherein the mobile terminal including a first control unit, a battery, a first energy management unit configured to power the mobile terminal, a first power switch and a first port; the audio device including a second control unit, a second energy management unit configured to power the audio device, a second power switch, a second port matching with the first port and a third port; energy provided by an external power supply transmitting to the second power switch, the second port, the first port and the first energy management unit via the third port; the third port being connected to the second energy management unit and configured to transmit energy to the second energy management unit.

Abstract: The present disclosure discloses a two-wheeled self-balancing robot which solves the technical problems in the prior art that the robot can only travel on a flat ground and its driving environments are limited by making improvements in its mechanical structure. The two-wheeled self-balancing robot comprises a vehicle body with wheels mounted on both sides thereof. The vehicle body comprises a parallelogram frame which can deform tiltedly. The vehicle body is provided with a stage, and the stage is hinged with the parallelogram frame. The parallelogram frame is provided with a first motor. The first motor drives the parallelogram frame to deform tiltedly according to road conditions so as to always keep the stage horizontal. The two-wheeled self-balancing robot according to the present disclosure can adapt to complicated road conditions, and its stage always keeps horizontal such that the object carried is not prone to fall off.

Abstract: The present disclosure relates to a head-mounted display device, comprising a device body, a front cover and a remote controller, wherein one end of the device body is a display end, the front cover is disposed on the device body and is opposite to the display end, and he front cover and the display end enable a display to be inserted therebetween when in use; and wherein the front cover is provided with a through hole opposite to the display end, in which the remote controller can be received and fixed. One technical effect of the present disclosure is that the remote controller herein is easy to store and can be carried integrally with the device body.

Abstract: A cord winding module, comprising a rotary wheel (9) on which a cord (11) is wound and a stop button (4) working cooperatively with the rotary wheel. The cord winding module further comprises a spring wire (5) working cooperatively with the stop button as an elastic support device, and the stop button automatically brakes the rotary wheel under the action of the elastic force of the spring wire and prevents the rotary wheel from retracting the cord. The spring wire has an arc shape, or exhibits an arc shape when pre-pressed and deformed by the stop button.

Abstract: A button is disclosed. The button includes: a lower button shell, which is a hollow structure with an upper opening, and is provided with a first sliding pin hole through a side wall of the lower button shell; an upper button shell, which is a hollow structure with a lower opening, wherein a side wall of the upper button shell is provided with a second sliding pin hole, the upper button shell is sleeved on the lower button shell, and the second sliding pin hole is directly opposite to the first sliding pin hole; a moveable tray, which is located at a central position in the lower button shell; a sliding arm, one end of which is rotatably connected to the moveable tray; a sliding pin, which is located in the lower button shell.

Abstract: An imaging method for a virtual reality device, and a virtual reality device are provided. The method comprises: acquiring an image; calculating the radius of a minimum inscribed circle of the image; calculating a distortion ratio at the minimum inscribed circle according to the radius and a selected distortion formula; enlarging the image by using the calculated distortion ratio as an enlargement ratio; distorting the enlarged image according to the distortion formula; and outputting the distortion processed image to a screen for displaying.

Abstract: Embodiments of the present disclosure provide a connection request processing method, a Bluetooth earphone, a wearable device, a system and a storage medium. In the embodiments of the present disclosure, upon receiving an A2DP connection request sent by a terminal device, it being not necessary to maintain an A2DP connection with the terminal device is determined according to current status information of the Bluetooth earphone; a type of the terminal device is identified according to a situation of other connection request sent by the terminal device received before receiving the A2DP connection request; and the A2DP connection request in a manner suitable for the type of the terminal device to maintain a non-A2DP connection status with the terminal device is processed.

Abstract: A method and device for noise-reduction processing and an earphone are disclosed. The method includes: collecting an environmental-sound signal by using a feedforward microphone to acquire amplitude information and spectrum information of the environmental-sound signal; performing feedforward noise-reduction processing on the environmental-sound signal according to the amplitude information of the environmental-sound signal, and extracting a sound signal having a specified frequency in the environmental-sound signal according to the spectrum information of the environmental-sound signal; and outputting the sound signal having the specified frequency together with the signal after being feedforward noise-reduction processed. The present disclosure can realize the monitoring of the valuable sound signal having a specified frequency in the environmental-sound signal.

Abstract: A playback synchronization method and device and a USB sound card are disclosed. In the technical solutions according to the present disclosure, the number of writes for writing data into the audio data buffer by the write pointer of the master device and the number of reads for reading data from the audio data buffer by the read pointer of the slave device are acquired, and it is determined whether the data transmission of the master and slave devices is synchronized or not by judging the magnitude relationship between the number of writes and the number of reads. If it is not synchronized, the position of the read pointer is adjusted so that the write pointer and the read pointer are synchronized again, i.e., the write data and the read data are synchronized again. Thus, the problem that the clocks of the master and slave devices are relatively independent and the data transmission is not synchronized due to the clock deviation is solved.

Abstract: A method and apparatus for acquiring a battery capacity and an electronic device are provided. The method includes: acquiring a charging instruction; acquiring a discharging voltage value and its corresponding capacity and a voltage threshold of a battery to be detected according to the charging instruction; acquiring a charging capacity of the battery to be detected according to the discharging voltage value and the voltage threshold of the battery to be detected; and acquiring a capacity of the battery to be detected according to the capacity corresponding to the discharging voltage value of the battery to be detected and the charging capacity of the battery to be detected.

Abstract: A button is disclosed. The button includes: a lower button shell, which is a hollow structure with an upper opening, and is provided with a first sliding pin hole through a side wail of the lower button shell; an upper button shell, which is a hollow structure with a lower opening, wherein a side wall of the upper button shell is provided with a second sliding pin hole, the upper button shell is sleeved on the lower button shell, and the second sliding pin hole is directly opposite to the first sliding pin hole; a moveable tray, which is located at a central position in the lower button shell; a sliding arm, one end of which is rotatably connected to the moveable tray; a sliding pin, which is located in the lower button shell.

Abstract: Provided are an eyepiece and a head-mounted display device, where the eyepiece includes: a positive lens and a negative lens arranged sequentially and coaxially; where a light incident surface of the positive lens is a planar Fresnel surface, and a light emergent surface of the positive lens is a convex surface; a light incident surface of the negative lens is a concave surface, and a light emergent surface of the negative lens is a convex surface; and the light to be observed is incident on the light incident surface of the negative lens and refracted by the negative lens to the light incident surface of the positive lens, and enters human eyes after being refracted by the positive lens. The eyepiece and head-mounted display device provided by the present disclosure realize an ultrathin eyepiece optical system and facilitate a miniaturized and lighter head-mounted display device.

Abstract: A method for calibrating a light smart watch includes: providing an FPC soft board under a dial, a size of the FPC soft board matching a size of the dial, the FPC soft board is divided into a plurality of partitions, each partition is insulated from other partitions, and each of watch hands and each partition form a capacitor in turn when the watch hands run; detecting a capacitance change amount of each partition, determining positions of partitions where the watch hands are currently located, and determining a current time indicated by the watch hands, according to the positions of partitions where the watch hands are currently located; comparing the current time indicated by the watch hands with a current time of a mobile terminal to determine a time error; and adjusting the watch hands, according to the time error to run in sync with the time of the mobile terminal.

Abstract: A speaker and earplug earphones are provided. The speaker includes a cylindrical speaker housing. A partition board arranged along a radial direction is disposed in an enclosed cavity. A first speaker and a second speaker are respectively disposed on both sides of the partition board, and each includes a magnetic circuit system and a vibrating system. A magnetic gap is disposed between the magnetic circuit system and the speaker housing, and an air pressure balance holes are formed in the partition board located at the magnetic gap. The vibrating system includes a voice coil and a vibrating diaphragm covering the end part of the speaker housing. Each earplug earphone includes an earphone front housing and an earphone back housing. The speaker is mounted in the enclosed space. Multiple front housing sound output holes is formed in the earphone front housing. An acoustic waterproof membrane is disposed between the multiple front housing sound output holes and the speaker.

Abstract: Provided are a three-dimensional image capturing device and a method. The device includes: a first lens module and a second lens module, and an adjustable mechanism connecting the first lens module and the second lens module respectively. The adjustable mechanism is capable of changing a lens interval between the first lens module and the second lens module; and a processing apparatus connected to the first lens module and the second lens module, configured to determine a capturing interval between the three-dimensional image capturing device and a target capturing object, determine a target lens interval corresponding to the capturing interval; control the adjustable mechanism to adjust an interval between the first lens module and second lens module to be the target lens interval, and capture a three-dimensional of the target capturing object by using first lens module and second lens module, which enlarges the capturing range of three-dimensional image capturing device.