Abstract: A method for controlling operating time of an electronic device includes acquiring a facial image of a user, and a distance from the user to the electronic device. A facial zone from the facial image is recognized from the facial image, and a ratio is calculated between a size of the facial zone and a preset screen size of a display of the electronic device, and the distance between the user and the electronic device is acquired. When the user is determined not to be an adult based on analyses of the facial image and the acquired distance, the electronic device is turned off after a first determined duration.

Abstract: An electronic device includes a radio frequency power amplifier, a storage device, at least one processor, and one or more modules that are stored in the storage device and executed by the at least one processor. The one or more modules includes a power obtaining module, a comparing module, and an indicating module. The power obtaining module obtains an output power of the radio frequency power amplifier. The comparing module compares the output power of the radio frequency power amplifier obtained by the power obtaining module with at least one pre-determined value, and the comparing module outputs a comparing result according the comparison of the output power and the at least one pre-determined value. The indicating module generates an alerting signal according to the comparing result output from the comparing module, for indicating electromagnetic radiation of the electronic device.

Abstract: A housing includes a main body, the main body includes a plurality of metal sheets and a plurality of resin layers, each metal sheet alternates with one resin layer, each two adjacent metal sheets are fixed together by one resin layer located between the two metal sheets. An electronic device using the housing is also provided.

Abstract: A housing includes a substrate and a decorative layer deposited on the substrate. The decorative layer includes chromium, iron, aluminum, chromium oxide, ferric oxide, and aluminum oxide. The chromium oxide, ferric oxide, and aluminum oxide distribute evenly among the chromium, iron, and aluminum respectively, such that the chromium, iron, and aluminum atoms are separated from each other. The decorative layer is electrically non-conductive and electromagnetically transmissive and gives the housing a mirror-like black and metallic appearance. An electronic device using the housing is also described.

Abstract: A housing for a portable electronic device is provided. The housing includes a first section made of metal and a second section made of dielectric ceramic. The second section is coupled to the first section to cooperatively define an accommodating space. When an antenna is coupled to an inner surface of the second section facing the accommodating space, the antenna can transmit and receive signals through the second section. A portable electronic device incorporating the housing is also provided.

Abstract: An exemplary wireless communication device includes a circuit board, a first antenna, a second antenna, and an end portion. The circuit board includes a feed terminal. The first antenna is located on the circuit board adjacent to the feed terminal. The second antenna is electronically connected to the feed terminal. The end portion serves as a portion of a metal housing of the wireless communication device and includes a positioning portion. The positioning portion secures the first antenna and the end portion to the circuit board.

Abstract: An screw assembling device includes a supplying mechanism, a securing mechanism, a driving mechanism, and an assembling mechanism. The supplying mechanism supplies a number of screws sequentially. The securing mechanism holds a housing of an electronic device. The assembling mechanism is connected to the supplying mechanism and the driving mechanism. The assembling mechanism is driven by the driving mechanism to predetermined positions of the housing of electronic device and is configured for assembling the plurality of screws transmitted from the supplying mechanism to the predetermined positions of the housing of electronic device.

Abstract: An evaporating device comprises a gas guiding element, an evaporating boat received in the gas guiding element to define a receiving space between the evaporation tray and the gas guiding element, and a gas channel. The evaporation tray comprises a bottom wall and two opposing first sidewalls and two opposing second sidewalls extending from the periphery of the first bottom wall. At least one of the first sidewalls and/or at least one of the second sidewalls defines a number of gas holes. The gas holes communicate with the receiving space. One end of the gas channel connects the gas guiding element and communicates with the receiving space to feed gas into the receiving space. A vacuum evaporation device using the evaporating device is also provided.

Abstract: A baking transmission mechanism includes a dustproof assembly, which includes a box, a main transport wheel, and a drive unit. The first transportation assembly includes a first oven assembly, a first feed wheel, a first discharge wheel, a first pulley assembly, and a second pulley assembly. The first feed wheel and the first discharge wheel are located at a top of the first oven assembly, and the first pulley assembly and the second pulley assembly are located at opposite sides of the first oven assembly. The second transportation assembly includes a second oven assembly, a second feed wheel, a second discharge wheel, and a third pulley assembly, wherein the second feed wheel and the second discharge wheel are located at a top of the second oven assembly, and the third pulley assembly is adjacent to the second pulley assembly.

Abstract: A portable power source includes a main body and a power button. The main body includes a receiving portion. The receiving portion defines a receiving groove and includes a protrusion received in the receiving groove. The protrusion includes a contact switch. The power button includes a button body and a latching arm. The button body pushes the contact switch to turn on/off the portable power source, and the latching arm rebounds the button body away from the contact switch.

Abstract: A wearable electronic device includes a housing, an electronic module received in the housing, and a cover assembly. The cover assembly includes a cover and a rotating member. A first end of the rotating member is rotatably connected to the cover. A second end of the rotating member is detachably latched to the cover. When the rotating member is latched to the cover, the rotating member resists against the housing.

Abstract: A sifting device for components such as nuts includes a box, a supporting frame, a guiding board, and a covering board. The box receives the components. The guiding board is secured on the supporting frame and defines a receiving recess and a sliding groove, the receiving recess communicates with the box and the sliding groove. The covering board covers the guiding board and defines a plurality of holes as air jets, the plurality of holes aim at the receiving recess and the sliding groove to blow the components through the sifting device in an orderly manner.

Abstract: A device for making nano-scale particles of titanium dioxide includes a vacuum chamber; an evaporator, a gas supplier, a vacuum pump assembly, and a product collecting device. The evaporator is mounted in the vacuum chamber. The gas supplier communicates with the vacuum chamber. The vacuum pump assembly communicates with the vacuum chamber. The product collecting device includes a pump, a guide pipe connected with the pump, and a powder collector communicating with the guide pipe. The pump communicates with the vacuum chamber. The guide pipe is inserted in the powder collector, the powder collector is filled with organic solvents. A method of making nano-scale particles of titanium dioxide using the device is also provided.

Abstract: An electronic device includes a touch screen, a background light, and a proximity sensor. The electronic device sets a default value for an amount of electric power supplied to the proximity sensor and a rule for adjusting the amount of electric power supplied to the proximity sensor. When a calling function of the electronic device is started, the electronic device is enabled to supply the proximity sensor the amount of electric power having the default value, and determines if the proximity sensor detects an object near the touch screen with the amount of electric power having the default value. The electronic device increases or decreases the amount of electric power supplied to the proximity sensor according to the rule.

Abstract: An antenna assembly includes a first antenna, a second antenna, and at least one connecting member. The first antenna includes a radiator and at least one connecting portion connected to the radiator, and the radiator is a part of a housing of a wireless communication device. The at least one connecting member is connected to the at least one connecting portion to fix the first antenna to the wireless communication device to feed current to the first antenna and the second antenna.

Abstract: A wireless communication device includes a cover, an antenna, and an adjusting member. The adjusting member is slidably mounted to the cover and is made of non-conductive materials. The antenna includes a extending portion, the extending portion is sandwiched between the cover and the adjusting member. The adjusting member contacts and partially overlaps with the extending portion, the adjusting member slides relative to the cover to change contact positions of the extending portion and the adjusting member.

Abstract: A sifting device for workpieces includes a box, an electric cabinet, a sifting assembly, an air blower, and an collector. The box receives the workpieces. The sifting assembly is received in the box, and includes a baffle and a guiding board, the guiding board defines a plurality of gaps, and a slit is formed between the baffle and the guiding board, and communicates with the plurality of gaps. The air blower is directed by the electric cabinet and communicates with the gap to adjust a direction of the workpieces to allow the workpieces to pass through the gap and the slit. The collector communicates with the slit to output the workpieces.

Abstract: A protective case includes a main housing and a cover. The main housing includes a wire arranging portion with a first frame, a second frame, and a third frame. The first frame and the second frame are diagonally positioned each other, and the third frame are positioned at one side of the second frame. The cover is detachable from the main housing for covering the wire arranging portion.

Abstract: A portable electronic device includes a first module, a second module, a housing, and a plurality of fasteners. The first module is configured to be coupled to a first side of the main housing, and the second module is configured to be coupled to a second side of the main housing opposite the first side. The fasteners configured to secure the first module to the main housing and the second module to the main housing. One of the main housing or the first module defines a plurality of recesses, the other one of the main housing or the first module comprises a plurality of hooks configured to latch to a respective recesses.

Abstract: A foam assembly includes a foam body, the foam body defining a plurality of through holes. The foam assembly further includes a colloid body formed by a first colloid portion formed on one of two opposing surfaces of the foam body, a second colloid portion formed on a second of two opposing surfaces of the foam body, and connecting portions extending through the through holes of the foam body from one opposing surface of the foam body to the other. A method for manufacturing the foam assembly and an electronic device using the foam assembly are also disclosed.