Abstract: A light guide plate includes a body having a bottom surface and a light output surface opposite to the bottom surface. A scattering structure is formed on the bottom surface. The scattering structure includes a number of scattering dots located in the form of a number of concentric shapes around the center. The scattering dots adjacent to the center are arranged in a plurality of concentric circles. The scattering dots adjacent to the edge are arranged in a number of concentric quadrilaterals having a shape substantially corresponding to a shape of the light guide plate. A backlight module using the light guide plate is also provided.

Abstract: A latching mechanism for a portable electronic device includes a housing, a pressing assembly, a latching assembly and a cover, the cover latches in the housing with the latching assembly, the pressing assembly is pushed along a first direction, causing the latching assembly to slide along a second direction perpendicularly to detach the cover from the housing.

Abstract: A cathode composite material includes a cathode active material particle having a surface, and a continuous aluminum phosphate layer coated on the surface of the cathode active material particle. A material of the cathode active material particle is layered type lithium nickel oxide. The present disclosure also relates to a lithium ion battery and a method for making the cathode composite material.

Abstract: An electronic device includes a frame having a protrusion, a support, and a hinge assembly. The hinge assembly rotatably connects the frame and the support. The hinge assembly includes an elastic member providing a force pulling the frame and the support to move towards each other. The protrusion of the frame and the support cooperatively support the electronic device on a surface.

Abstract: Interface protector for an electronic device includes a housing defining an opening exposing the interface; a retaining element defining a first stopping slot and a second stopping slot, the retaining element mounted to the housing by a retaining member; a cover having a protrusion protruding therefrom, the cover rotatably mounted to the retaining element by a rotation member. When the protrusion is received in the first stopping slot, the cover shields the interface; when the protrusion slides out of the first stopping slot, until latching in the second stopping slot, the cover is rotated to expose the interface.

Abstract: A camera module includes a base board and a lens holder mounted on the base board. The lens holder includes a main body and at least one ventilation portion integrally formed with the main body. The main body includes a top wall and a peripheral wall extending from a peripheral edge of the top wall. The top wall and the peripheral wall cooperatively define an accommodating space. The top wall defines a viewing aperture through the top wall thereof and at least one riser vent positioned adjacent to the peripheral wall. The at least one ventilation portion covers the riser vent, and is made of a waterproof breathable material.

Abstract: In an electronic device and method of matching an image A and an image B, grayscale centers of the image A and the image B are computed. The image A is divided into n equal parts Dk(k=1˜n) according to the grayscale center, and a grayscale density Vk of each part Dk is computed, to acquire n grayscale densities Vk(k=1˜n) which are regarded as feature data u of the image A. Feature data v of the image B is extracted in the similar way. A similarity of a grayscale density Vak selected from the feature data u and the grayscale density Vbk selected from the feature data V, is computed. Thus, n similarities are computed. A similarity ?(n, u, v) of the image A and the image B is computed according to the n similarities.

Abstract: A latching structure of electronic device includes a lower housing, a circuit board and an upper housing. The lower housing forms at least one fixing pole; The circuit board defines at least one positioning slot corresponding to the fixing pole; The upper housing defines at least one engaging hole corresponding to the fixing pole. The fixing pole, passes through the positioning slot and the engaging hole, and the distal end of the fixing pole becomes liquefied, secures the lower housing with the circuit board and the upper housing, the circuit board is clamped between the lower housing and the upper housing.

Abstract: A device for making a carbon nanotube film includes a substrate and a catalyst layer on the substrate. The catalyst layer has two substantially parallel sides. The present disclosure also provides a method for making a carbon nanotube film. The catalyst layer is annealed at a high temperature in air. The annealed catalyst layer is heated up to a predetermined reaction temperature in a furnace with a protective gas therein. A carbonaceous gas is supplied into the furnace to grow a carbon nanotube array having two substantially parallel side faces. A carbon nanotube film is drawn from the carbon nanotube array. A drawing direction is substantially parallel to the two substantially parallel side faces of the carbon nanotube array.

Abstract: A circuit board includes a substrate and a supporting frame fixed to, and supporting, the substrate. The supporting frame includes a main body, a pressing supporting portion, two pulling supporting portions and two fixing portions. The main body includes a first arm and a second arm connected to the first arm. The pressing supporting portion extends downwards from a junction of the first arm and the second arm for counterbalancing a downward force applied upon the substrate. The pulling supporting portions respectively extend downwards from distal ends of the first arm and second arm for counterbalancing an upward force applied upon the substrate. The two fixing portions are respectively formed on the first arm and second arm. Each of the fixing portions is located between the pressing supporting portion and one corresponding pulling supporting portion and is closer to the corresponding pulling supporting portion.

Abstract: A server assembly includes a first server and a first airflow guiding pipe. The first server comprises a front wall. An input hole is defined in the front wall. A first input opening and a first output opening are defined in the first airflow duct. The first output opening corresponds to the input hole so as to guide airflow into the inner of the first server to dissipate heat generated by the first server. The first airflow guiding pipe is connected to the first input opening of the first airflow duct, the first airflow guiding pipe is configured to receive and guide airflow into the first airflow duct.

Abstract: A method for testing an image capturing function of an electronic device includes following blocks. A test program package with an exemplar image is installed in the electronic device. The electronic device is placed on a test fixture used for limiting an image capturing position and an image capturing angle of the electronic device. The electronic device captures an image to be tested by the electronic device. The image to be tested is compared with the exemplar image to determine whether the image capturing function of the electronic device is satisfactory.

Abstract: A light emitting diode (LED) includes an LED chip, a casting, two metallic electrodes and a heat sink. The casting includes a first surface, a second surface and an outer peripheral side surface interconnecting the first and second surfaces. The casting defines a receiving space concaved inwardly from the first surface for receiving the LED chip therein. A through hole is defined in the casting and extends from the receiving space to the second surface. The metallic electrodes are separated from each other. Each metallic electrode includes a first terminal electrically connecting with the LED chip, and a second terminal disposed at the outer peripheral side surface of the casting. The heat sink is filled in the through hole and thermally contacts the LED chip. The heat sink is thermally and electrically insulated from the metallic electrodes by the casting.

Abstract: A centrifugal fan includes a fan frame (20), and a stator (30) and a rotor (40) received in the fan frame. The fan frame includes a bottom base (22), an opposite top cover (21) and a side wall (23) interconnecting the bottom base and the top cover. A first air inlet (24a) is defined in the top cover and a second air inlet (24b) is defined in the bottom base. The rotor includes a hub (41) and a plurality of blades (42) extending from an outer periphery of the hub. An air flow channel (48) is formed between an outer periphery of the blades and the side wall of the fan frame. A cylindrical wall (26, 26a) is formed around one of the first air inlet and the second air inlet to guide airflow from the first and second air inlets into the air flow channel and block the airflow in the air flow channel from flowing back towards the first and second air inlets.

Abstract: A system and method for encrypting an electronic file in a mobile electronic device reads bytes of the electronic file from a cache of a memory system and divides the bytes into a plurality of byte lines. The system and method further assigns a numerical cipher to each byte line and searches a position of each numerical cipher in a corresponding byte line. Furthermore, the system and method encrypt each byte line by inserting one or more random bytes into each byte line, and generates an encrypted electronic file by combining all the encrypted byte lines.

Abstract: A display device includes a dial, an alarm setting member, and a warning unit. The alarm setting member includes an A/D converter, a recognition module, a storage module, and an analysis module. With rotation of the dial, a variation voltage is generated. The A/D converter converts variable voltage from analog to digital form. In contrast, the alarm time is decreased. The storage module stores the adjusted alarm time. The analysis module compares the current time with the preset alarm time and outputs a driving signal to the warning unit in the event of a match.

Abstract: A thermoacoustic device includes a thermoacoustic module, a first protection component, a second protection component, and an infrared-reflective film. The thermoacoustic module includes a sound wave generator, at least one first electrode and at least one second electrode. The at least one first electrode and the at least one second electrode are electrically connected to the sound wave generator. The sound wave generator includes a carbon nanotube structure, and the first and second protection components are located on opposite sides of the sound wave generator. The infrared-reflective film is located on the first protection component.

Abstract: A nanoimprint resist includes a hyperbranched polyurethane oligomer (HP), a perfluoropolyether (PFPE), a methylmethacrylate (MMA), and a diluent solvent. A method of a nanoimprint lithography is also provided.

Abstract: A method for making a carbon nanotube film includes the following steps. A carbon nanotube array fixed on a substrate holder is provided. A carbon nanotube film is drawn from the carbon nanotube array. A first part of the carbon nanotube film is adhered to a first bar placed on a bar supply device. The carbon nanotube film is stretched by the first bar. A second part of the carbon nanotube film is adhered to a second bar positioned on the bar supply device. A third part of the carbon nanotube film is adhered to a supporting element placed on a carrier device. The third part of the carbon nanotube film is separated from the first part and the second part of carbon nanotube film. The third part of the carbon nanotube film adhered to the supporting element is obtained.