Abstract: A computer system includes a wireless keyboard, a reader, and a computer. The wireless keyboard includes an antenna, an array of keys, a storage unit, a scanning unit, and a processing unit. The keys in the array are associated with tags. The storage unit stores a content of a pair of tags of each key. The scanning unit scans the keys to determine when one or more keys are pressed. When one or more keys are pressed, the processing unit acquires the tag content corresponding to each of the one or more keys and sends the content to the reader.

Abstract: A holder to hold a projector includes a support. One side of the projector is capable of being attracted by a magnet. The support includes a base board and a supporting board connected to the base board. The base board is to be supported by a supporting surface. The support further includes a first magnet fixed on the supporting board to attract the side of the projector, for adjustably and magnetically supporting the projector on the supporting board.

Abstract: An electronic device includes a main body and a port connector. The main body includes a printed circuit board, a bottom plate and a side plate cooperatively defining a opening. The printed circuit board is fixed parallelly to the bottom plate. The port connector includes an outer angled plate having a first wall, a second wall, and first pins and second pins. The first wall is attached to the bottom plate and defines first ports. The second wall is attached to the side plate and defines second ports. Each of the first pins is retained within one of the first ports and contacting the printed circuit board. Each of the second pins is retained within one of the second ports and contacting the printed circuit board.

Abstract: A rotation sensing device comprises a capacitor module comprising an upper substrate and a lower substrate. The upper substrate comprises a plurality top plates mounted thereon, and the lower substrate comprises a plurality bottom plates mounted thereon. A pointing module comprises a pointer rotatably set between an upper substrate and a corresponding lower substrate. The pointer comprises a first portion. A detection circuit is electronically connected to the top plates and the bottom plates, and is configured for detecting pulses caused by a change of the capacitance resulting from movement of the first portion, determining a position change of the first portion relative to the initial position according the detected pulses, and determining a rotation orientation of the capacitor module according to the determined position change.

Abstract: A wireless charging system includes a charger and an electronic device. The charger includes a power input port including two input terminals for connecting to a power source and a power output port including two first metal sheets respectively connected to the two input terminals. The electronic device includes a power input port including two second metal sheets, a voltage conversion circuit connected to the two second metal sheets, a rectifier and filter circuit, and a battery. When the power output port of the charger is close to and faces the power input port of the electronic device. The two first metal sheets and the two second metal sheets form two capacitors, the power source provides power to the electronic device via the two capacitors and charges the battery after the power is processed by the voltage conversion circuit and the rectifier and filter circuit.

Abstract: The present disclosure provides an electronic device with a remote control earphone electrically connected to the main body of the device. The remote control earphone includes seven sensing units, which are substantially arranged in a “8” shape. Sensing signal generated by each sensing unit in response to a touch from the user includes an identification code for identifying itself. The remote control earphone transmits the generated sensing signal to the main body. The main body includes a cache unit to store at least one identification code corresponding to the sensing signal, a storage unit to store the relationship between the identification codes and numbers the identification codes corresponding to, and a processing unit to determine which one of the numbers is input according to the at least one identification code and the relationship.

Abstract: An electronic device comprises a main body and a stylus. The main body comprises a front cover, a conducting sheet, a conducting core, and a monitoring module. The front cover defines an elongated pocket. The conducting sheet is disposed in the elongated pocket. The conducting core is disposed in one end of the elongated pocket. The monitoring module electrically connected with the conducting sheet and the conducting core. The stylus received in the elongated pocket comprises an outer section, a conducting layer, and an inner section. The outer section comprises a tip and a stripped slot. The conducting layer is mounted on the stripped slot. The conducting layer is electrically connected with the tip. The inner section comprises a protrusion, the inner section is sleeved in the outer section, and the protrusion protrudes out of the second tube and slidably contacts with the conducts layer and the conducting sheet.

Abstract: A reflector applied in a projector including a projection control circuit, a light source unit, a beam combiner, and a lens is disclosed. The reflector includes a transparent electrode layer, an electrophoresis layer and a pixel electrode layer. The electrophoresis layer includes a plurality of micro cups, each micro cup contains suspension therein and a plurality of charged particles. The pixel electrode layer includes a plurality of pixel electrodes corresponding to the micro cups. The projection control circuit provides voltages between each pixel electrode and the transparent electrode layer to drive the charged particles to migrate. When the charged particles arrive at the transparent electrode layer, the lights from the light source unit are reflected by the charged particles to the beam combiner to be combined into an image to be transmitted to the lens to project an image.

Abstract: An electromagnetic motion sensor includes a base, an electromagnetic induction layer, a block, and an emitting coil. The electromagnetic induction layer with a plurality of induction coils is arranged on the bottom of the base. The block is movably connected to the base by a plurality of elastic members. The emitting coil is fixed to a center of the bottom of the block facing the induction layer. A circuit inside the block provides current to the emitting coil. The block moves with the jerk of the motion sensor when the motion sensor is jerked, causing the elastic members to be distorted. The relative movement between the block and the magnetic induction layer causes more than one of the induction coils generate and output voltage signals according to the change of magnetic flux through the plurality of induction coils caused by the moving of the emitting coil.

Abstract: A motion sensing device includes a housing defining a chamber that includes a number of sidewalls. A number of movable members are connected to the sidewalls and able to move toward the sidewalls. Each movable member includes a number of conductive grooves opposing the sidewalls and having a resistance layer. A number of conductive spring members are respectively fixed to the sidewalls and each include a free end movably received in one conductive groove. An inertial weight is movably received in a space defined by the movable members. When the motion sensing device is jerked, the inertial weight moves and is able to apply a pushing force to one of the movable members, causing one of the movable members to move and causing two of the free ends in the same conductive groove to move toward each other.

Abstract: A shield case is configured for supporting a memory card. The shield case includes a recessed portion, and a first edge, a second edge, and a third edge arranged around the recessed portion. The first edge forms a first support plate. The second edge forms a second support plate. The first support plate and the second support plate cooperatively support the memory card.

Abstract: A method for granting access with a touch sensitive display is provided. The method includes displaying a security access interface on a touch sensitive display, wherein the security access interface has at least one polyhedron object; changing the at least one polyhedron object from a first state to a second state according to detections of inputs/contacts with the touch sensitive display; recording parameters of the at least one polyhedron object in the second state; determining if the recorded parameters satisfy the predetermined values; granting access when the record parameters satisfy the predetermined values. A security system using the method is also provided.

Abstract: A heat dissipater and a printed circuit board module using the heat dissipater are disclosed. The heat dissipater includes at least two electrode plates and a number of rotatable charged particles between the at least two electrode plates. The at least two electrode plates are respectively connected to a positive terminal and a negative terminal of a variable power supply, and generating an alternating electric field therebetween. Each of the plurality of charged particles is made of thermal conductive material and includes a positive portion and a negative portion coupled to the positive portion.

Abstract: A computer system includes a wireless keyboard, a reader, and a computer. The wireless keyboard includes an antenna, an array of keys, a storage unit, a scanning unit, and a processing unit. The keys in the array are associated with tags. The storage unit stores a content of a pair of tags of each key. The scanning unit scans the keys to determine when one or more keys are pressed. When one or more keys are pressed, the processing unit acquires the tag content corresponding to each of the one or more keys and sends the content to the reader.

Abstract: A holder to hold a projector includes a support. One side of the projector is capable of being attracted by a magnet. The support includes a base board and a supporting board connected to the base board. The base board is to be supported by a supporting surface. The support further includes a first magnet fixed on the supporting board to attract the side of the projector, for adjustably and magnetically supporting the projector on the supporting board.

Abstract: A reflector applied in a projector including a projection control circuit, a light source unit, a beam combiner, and a lens is disclosed. The reflector includes a transparent electrode layer, an electrophoresis layer and a pixel electrode layer. The electrophoresis layer includes a plurality of micro cups, each micro cup contains suspension therein and a plurality of charged particles. The pixel electrode layer includes a plurality of pixel electrodes corresponding to the micro cups. The projection control circuit provides voltages between each pixel electrode and the transparent electrode layer to drive the charged particles to migrate. When the charged particles arrive at the transparent electrode layer, the lights from the light source unit are reflected by the charged particles to the beam combiner to be combined into an image to be transmitted to the lens to project an image.

Abstract: A transmission device includes a holder, a pivot shaft, and an elastic member. The holder defines a receiving hole. The pivot shaft is received in the receiving hole. The elastic member is received in the receiving hole, fixed to the holder, and tightly enfolds the pivot shaft. When torques applied to the holder or the pivot shaft are larger than a predetermined value, the elastic member is deformed such that the pivot shaft rotates relative to the holder.

Abstract: A dual-display electronic device includes a housing, a first type of display panel mounted on the housing, and a second type of display unit received in the housing. The housing defines a receiving space therein and an opening communicating with the receiving space. The second type of display unit is slidably received in the receiving space and includes an second type of display panel. A first magnet is mounted on the second type of display unit, a second magnet and an electromagnet are mounted on the housing respectively. When the electromagnet is powered off, the second magnet attracts the first magnet to keep the second type of display panel hiding in the receiving space. When the electromagnet is powered on, the electromagnet attracts the first magnet to make the second type of display panel slide out of the receiving space.

Abstract: A touch panel includes a touch layer, a first Indium Tin Oxide (ITO) electrode layer, a second ITO layer, and a microcapsule layer. The first ITO electrode layer includes a plurality of first ITO electrode. The second ITO electrode layer includes a plurality of second ITO electrodes. Each of the first ITO electrodes and one corresponding second ITO electrode forms an electrode unit. The microcapsule layer includes a plurality of microcapsules. Each microcapsule is connected to the first ITO electrode and the corresponding second ITO electrode. Each microcapsule comprises a plurality of positively charged particles and negatively charged particles. When the touch panel is touched, the distribution of the positively and negatively charged particles in the microcapsule corresponding to the touch portion of the touch layer is placed in a polarization state. An electronic device using the touch panel is also provided.

Abstract: A track detection device includes an insulating spherical housing including an inner surface, a plurality of electrostatic induction units embedded within the insulating spherical housing and evenly spaced around a center of the insulating spherical housing, a charged ball moveably attracted to the inner surface of the insulating spherical housing, and a processor electrically connected to the plurality of electrostatic induction units. The plurality of electrostatic induction units generate electrical signals when the charged ball rolls along the inner surface at a portion of the insulating spherical housing where the electrostatic induction unit is embedded. The processor is configured for detecting a track of the charged ball moving inside the insulating spherical housing according to the electrical signals.