Abstract: A method and device for dirt detection are provided. The method for dirt detection may include: periodically reading an in-focus index FV of a video shooting module of a terminal, wherein the video shooting module is in a shooting mode; determining whether there exists dirt on a camera based on values of the read FV; and transmitting a prompt information when it is determined that there exists dirt on the camera.

Abstract: A main body of a wearable device, includes: a front case; a bottom case joined with the front case to form a waterproof cavity; and electronic components disposed in the cavity, the electronic components including a printed circuit board (PCB) having a wireless data transceiving assembly, wherein the bottom case includes two charging contacts formed on an outer side of the bottom case and electrically coupled to the electronic components.

Abstract: A quad-band internal antenna may include an antenna radiating element, a first slotted hole and a second slotted hole arranged on a printed circuit board. The first slotted hole may be arranged along a direction perpendicular to the current flow direction of the printed circuit board, and the second slotted hole may be arranged between a ground pin and a feed pin of the antenna radiating element, such that the first slotted hole and the second slotted hole are both open slotted holes.

Abstract: A penta-band internal antenna and a mobile communication terminal may include: a first high-frequency branch, a second high-frequency branch, and a low-frequency branch of an antenna radiating element, and a first slotted hole and a second slotted hole arranged on a printed circuit board. The first slotted hole may be arranged along a direction substantially perpendicular to the current flow direction of the printed circuit board. The open-circuit end of the low-frequency branch may be fitted into the first slotted hole and the open-circuit end of the second high-frequency branch may be fitted into the second slotted hole.

Abstract: A near field communication electronic device and an antenna may include an antenna module, a near field communication control module and a battery-receiving groove. The antenna module may be electrically connected to the near field communication control module and the antenna module may be disposed around the battery-receiving groove.

Abstract: The described embodiments relate generally to thermal management and more particularly to a method and apparatus for providing thermal insulation from relatively small heat sources in small form factor electronic devices. An insulator layer can be placed between a small heat source and an exterior surface of the device, such as a cover glass layer. In one embodiment, a graphite layer can also be included between the cover glass layer and the insulator layer to spread any transmitted heat across the cover glass layer.

Abstract: A main body of a wearable device, includes: a front case; a bottom case joined with the front case to form a waterproof cavity; and electronic components disposed in the cavity, the electronic components including a printed circuit board (PCB) having a wireless data transceiving assembly, wherein the bottom case includes two charging contacts formed on an outer side of the bottom case and electrically coupled to the electronic components.

Abstract: What are described are magnetocaloric materials of the general formula (MnxFe1?x)2+zP1?ySiy where 0.55?x<1 0.4?y?0.8 ?0.1?z?0.1.

Abstract: The invention relates to a liquid pump device, having a pump shell body, a soft rubber pressing device, a discharge channel, a sealed discharge cap, and a guiding tube. The pump shell body has an upper shell and a lower shell connected to form a first cavity communicated with the discharge channel. The lower shell has an arc surface with an upward opening. A flange is arranged at the lower end of the arc surface of the lower shell, a through hole being arranged at the middle of the flange. The soft rubber pressing device forms a second cavity with the lower shell. The sealed discharge cap has at least one cut forming a discharge port, and is sleeved to an end portion of the discharge channel. The guiding tube is arranged in the through hole of the flange, and is communicated with the second cavity via the feeding channel.

Abstract: A grounded antenna may include cross-shaped high-impedance surface metal strips and a wireless communication device having said antenna. The antenna may include an antenna radiation unit and a ground plate and may be set inside of a housing. Multiple high-impedance surface units may be arranged on the ground plate in intervals.

Abstract: An antenna grounded with U-shaped high-impedance surface metal strips and its wireless communication device may include an antenna radiation unit and its ground plate, such that a plurality of high-impedance surface units are set in the ground plate at relevant intervals.

Abstract: A five-band Bluetooth built-in antenna and its mobile communication terminal provide bandwidth for communication. A built-in antenna comprises an antenna radiation unit and a first slot, a second slot and a third slot. Slots are added to approach a center frequency of a low-frequency branch part of the antenna so that the antenna generates resonance, so the low-frequency bandwidth of the antenna is increased. A high-frequency part of the antenna generates resonance by means of capacitive coupling.