Abstract: A handheld pneumatic grinder comprises a main body, a transmission portion, and a wheel guard structure. The main body defines an active space. The transmission portion is provided on the main body. The wheel guard structure includes a coupling member, a protective hood, and a control member. The coupling member is coupled to the main body around the transmission portion. The protective hood is rotatably mounted to the coupling member at a center thereof, wherein the protective hood is provided with an engagement means defining a plurality of indentations. The control member has a protrusion, which can engage with one of the indentations of the engagement means to allow the protective hood to be fixed in an angle position. The present invention allows the protective hood to be adjusted without using an external tool, and can achieve a compact design.

Abstract: A chip on board light emitting diode (LED) device comprises a LED device, a printed circuit board (PCB) and a dissipation unit array. The LED device comprises a LED substrate, a first contact pad and a second contact pad above the LED substrate and a thermal layer formed on top surface of the LED device. The thermal layer comprises a thermal conductive material. A printed circuit board (PCB) comprises a PCB substrate with a thermal projection extending from surface of the PCB substrate, and a first and a second electrode pads above the PCB substrate. The thermal projection and the PCB substrate comprise the thermal conductive material. The dissipation unit array comprises a plurality of dissipation units each disposed between the LED device and the PCB. The thermal layer is thermally coupled to the thermal projection via at least one dissipation unit. Each of the first and second contact pads is electrically coupled to the corresponding electrode pad via at least one dissipation unit.

Abstract: A method of fabricating a light emitting diode device comprises depositing conductive material to cover a portion of surface of a conductive and reflective layer to form a first contact pad, and surfaces between adjacent first trenches to form a second contact pad; and depositing a first passivation layer over uncovered portion of surface of the conductive and reflective layer to form a first planar passivation contact surface between the first contact pad and the second trench and depositing bonding material to cover a portion of surface of the first contact pad, a portion of the second contact pad and a portion of the first planar passivation contact to form a first light emitting diode bonding pad on the first contact pad, a second light emitting diode bonding pad on the second contact pad, and a third light emitting diode bonding pad on the first planar passivation contact.

Abstract: A light-guiding cover structure includes a top cover unit and a light-guiding unit. The top cover unit has a plurality of receiving spaces formed therein. The light-guiding unit includes a plurality of light-guiding groups, wherein each light-guiding group includes a plurality of optical fiber cables received in the corresponding receiving space, and each optical fiber cable has two opposite ends exposed from the bottom surface of the top cover unit and respectively facing at least one light-emitting device and at least one light-sensing device that have been disposed under the top cover unit. Therefore, the optical fiber cables received in the corresponding receiving space, thus when the light-guiding cover structure is applied to the LED package chip classification system, the aspect of the LED package chip classification system can be enhanced.

Abstract: A solar cell and a manufacturing method thereof are provided. A laser doping process is adopted to form positive and negative doping regions for an accurate control of the doping regions. No metal contact coverage issue arises since a contact opening is formed by later firing process. The solar cell is provided with a comb-like first electrode, a sheet-like second electrode corresponding to the doping regions to obtain high photoelectric conversion efficiency by fully utilizing the space in the semiconductor substrate. Furthermore, the sheet-like second electrode can be formed by a material having high reflectivity to improve the light utilization rate of the solar cell. The manufacturing process of the solar cell is simplified and the processing yield is improved.

Abstract: A blow gun includes a body with a top path and a bottom path, and a volume adjustment device is installed between the top and bottom paths. The volume adjustment device is in contact with a press rod which has one end pivotably connected to the body. The opening of the press rod is controlled by operation of the volume adjustment device so as to change the volume of the pressurized air. The press rod can also be locked at a position so that it is not activated unintentionally.

Abstract: A method and a communication device for managing communication traffic for multiple communication technologies are provide. The method, performed by a communication device to manage communications with a first and a second network having a first and a second communication technology, respectively, includes: determining, by a second communication module, whether a first transmission of the first communication technology is in progress before proceeding with a second transmission having the second communication technology; when the first transmission is in progress, initiating, by a second communication module, an unavailable period of the first communication technology; initiating, by a second communication module, notification of the unavailability of the first communication technology to the first network; and proceeding, by the second communication module, with the second transmission.

Abstract: A localization system for mounting a game in a portable storage device onto a game console is provided. The system includes a portable storage device and a game console. After the game console is connected with the portable storage device and a game is selected via an application program menu, a target word unit and game information in a small database is searched. Then, whether any cover data or configuration data is corresponding to an identification code in the small database is checked. If yes, the cover data or configuration data is returned to the application program menu and displayed on a screen. The selected game is then downloaded into the game console from the portable storage device, thereby achieving the promptly mounting and localizing the game without downloading all games from the portable storage device.

Abstract: A pneumatic hand tool comprises a housing, a pneumatic motor held in the housing and an airflow regulation valve to control spinning direction of the pneumatic motor. The housing includes a handgrip and a holding portion connected to the handgrip. The handgrip has an airflow passage to receive driving airflow. The holding portion has a housing chamber to house the pneumatic motor and airflow regulation valve, and also has a first wall opposing the handgrip and a flow channeling chamber integrally extended from the first wall towards the housing chamber. The flow channeling chamber has a first directing vent located on the first wall and communicated with the airflow passage to receive the driving airflow and a second directing vent communicated with the airflow regulation valve to output the driving airflow to drive the pneumatic motor.

Abstract: An airtight gasket for a pneumatic tool including an airflow regulation portion, an air intake passage to direct high pressure air into the airflow regulation portion and a pneumatic motor to receive the high pressure air from the airflow regulation portion and generate spinning. The airflow regulation portion includes a regulation valve which contains a flow directing vent corresponding to the air intake passage and a recess surrounding the flow directing vent. The airtight to gasket is clamped between the regulation valve and air intake passage, and includes a base located in the recess, a through-hole located on the base to channel the high pressure air into the flow directing vent, and an airtight convex ring surrounded the through-hole and extended integrally from the base towards to air intake passage.

Abstract: A solar cell includes a semi-conductive substrate, a doping layer, an anti-reflection layer, an electrode, a passivation stacked layer and a contact layer. The semi-conductive substrate has a front and a back surface. The doping layer is disposed on the front surface. The anti-reflection layer is disposed on the doping layer. The electrode is disposed on the anti-reflection layer and electrically connected to the doping layer. The passivation stacked layer is disposed on the back surface and has a first dielectric layer, a second dielectric layer and a middle dielectric layer sandwiched between the first and the second dielectric layer. The dielectric constant of the middle dielectric layer is substantially lower than the dielectric constant of the first dielectric layer and the dielectric constant of the second dielectric layer. The contact layer covers the passivation stacked layer and electrically contacts with the back surface of the semi-conductive substrate.

Abstract: An engine structure having a conjugate cam assembly is provided and includes a piston which can be used to push or pulled by the conjugate cam assembly mounted on a camshaft through a connection rod, a roller rocker and two rollers. The conjugate cam assembly has two cams with cam profiles and relative arrangement angle which can be varied according to actual operational desire, so as to vary the ratio of intake/exhaust strokes and the ratio of compression/power strokes. Thus, the combustion efficiency and the exhaustion efficiency can be enhanced. When the camshaft finishes four strokes of an operational cycle, the camshaft only rotates one circle (i.e. 360 degree), so that the rotation speed of the camshaft can be lowered.

Abstract: An LED package chip classification system includes a rotation unit for transporting a plurality of LED package chips, a chip test unit, and a chip classification unit. The rotation unit includes a rotary turntable, a plurality of receiving portions formed on the rotary turntable, and a plurality of suction-exhaust dual-purpose openings respectively disposed in the receiving portions. Each LED package chip has a positive electrode pad and a negative electrode pad disposed on the bottom side thereof. The chip test unit includes a chip test module adjacent to the rotation unit for testing each LED package chip. The chip classification unit includes a plurality of chip classification modules adjacent to the rotation unit for classifying the LED package chips. Therefore, the LED package chips can be classified by matching the rotation unit, the chip test unit, and the chip classification unit.

Abstract: A packaged chip detection and classification device includes a rotation unit for transporting a plurality of packaged chips, a packaged chip detection unit, and a packaged chip classification unit. The rotation unit includes a rotary turntable, a plurality of receiving portions formed on the rotary turntable, and a plurality of suction-exhaust openings respectively formed in the receiving portions. Each receiving portion is used to selectively receive at least one of the packaged chips. The packaged chip detection unit includes a packaged chip detection module adjacent to the rotation unit for detecting each packaged chip. The packaged chip classification unit includes a packaged chip classification module adjacent to the rotation unit for classifying the packaged chips. Therefore, the packaged chip detection and classification device can be used to detect and classify no-lead packaged chips by matching the rotation unit, the packaged chip detection unit, and the packaged chip classification unit.

Abstract: A method for switching among antennas of a communication terminal includes receiving acceleration values periodically sensed by an accelerometer. The acceleration values indicate amount of changes in orientation of the communication terminal such as when a user changes from a standing up position to a laying down position. A difference value is calculated between a current acceleration value and a previous acceleration value. When the difference value is greater than a predetermined value, a switching unit is controlled to switch between a first antenna and a second differently oriented antenna, so that a best in use antenna orientation is maintained for best communication regardless of orientation of the communication terminal.

Abstract: A solar cell includes a substrate. The substrate has a light-receiving surface and a back surface opposite to the light-receiving surface. The substrate includes plural trenches formed on the back surface. The solar cell includes plural n-type diffusion areas and plural p-type diffusion areas alternately disposed on the back surface and the surface of the trenches. The possibility of recombination of the electron-hole pair while moving can be reduced because of the trenches, which are formed in the substrate.

Abstract: A packaged chip detection and classification device includes a rotation unit for transporting a plurality of packaged chips, a packaged chip detection unit, and a packaged chip classification unit. The rotation unit includes a rotary turntable, a plurality of receiving portions formed on the rotary turntable, and a plurality of suction-exhaust openings respectively formed in the receiving portions. Each receiving portion is used to selectively receive at least one of the packaged chips. The packaged chip detection unit includes a packaged chip detection module adjacent to the rotation unit for detecting each packaged chip. The packaged chip classification unit includes a packaged chip classification module adjacent to the rotation unit for classifying the packaged chips. Therefore, the packaged chip detection and classification device can be used to detect and classify no-lead packaged chips by matching the rotation unit, the packaged chip detection unit, and the packaged chip classification unit.

Abstract: A multi-rod mechanism for opening and closing molds is provided and includes a single cam, a first side connection rod assembly located on a first side of the cam, a first mold actuated by the first side connection rod assembly, a linkage connection rod, a second side connection rod assembly located on a second side of the cam and actuated by the linkage connection rod, and a second mold actuated by the second side connection rod assembly. The multi-rod mechanism only uses the single cam to simultaneously actuate the first and second molds, so that the structure of the multi-rod mechanism can be simplified, while the vibration, loading, noise and abrasion of components during operation can be relatively reduced.

Abstract: A handheld pneumatic grinder comprises a main body, a transmission portion, and a wheel guard structure. The main body defines an active space. The transmission portion is provided on the main body. The wheel guard structure includes a coupling member, a protective hood, and a control member. The coupling member is coupled to the main body around the transmission portion. The protective hood is rotatably mounted to the coupling member at a center thereof, wherein the protective hood is provided with an engagement means defining a plurality of indentations. The control member has a protrusion, which can engage with one of the indentations of the engagement means to allow the protective hood to be fixed in an angle position. The present invention allows the protective hood to be adjusted without using an external tool, and can achieve a compact design.

Abstract: A blow gun includes a body with a top path and a bottom path, and a volume adjustment device is installed between the top and bottom paths. The volume adjustment device is in contact with a press rod which has one end pivotably connected to the body. The opening of the press rod is controlled by operation of the volume adjustment device so as to change the volume of the pressurized air. The press rod can also be locked at a position so that it is not activated unintentionally.