Goertek Technology Co., Ltd.

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.

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.

The present disclosure relates to a loudspeaker module and an electronic device. The loudspeaker module comprises: a loudspeaker unit, a steel sheet and a module housing, wherein the loudspeaker unit is fixed in the module housing and divides an internal space of the module housing into a front chamber and a back chamber; the steel sheet is formed on the module housing by means of injection molding; and a hot-melt bonding medium is provided at the position where the steel sheet and the module housing are combined. A technical problem to be solved by the present disclosure is to prevent a gap between a module housing and a steel sheet from occuring during injection molding with the combination strength between the steel sheet and the module housing also being improved, thereby preventing the audio performance of a loudspeaker module from being affected.

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.

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.

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.

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.