Abstract: An antenna system includes an antenna array, a wireless transceiver module and a control module. The antenna array includes a first antenna and a second antenna coupled respectively to the wireless transceiver module. The wireless transceiver module sends and receives signals via the first antenna based on a first phase and sends and receives signals via the second antenna based on a second phase. The control module coupled to the wireless transceiver module, and controls the phase difference between the first phase and the second phase. The radiation pattern of the antenna array is modulated towards one pointing direction based on the phase difference.

Abstract: An external antenna adapted to a communication host and a wireless communication system are provided. The wireless communication system includes the external antenna and the communication host. The external antenna includes a first antenna element, a second antenna element, a logic determination circuit and a switching circuit. The first antenna element is configured to receive a wireless signal when the communication host operates in a reception mode. The second antenna element is configured to transmit the wireless signal when the communication host operates in a transmission mode. The logic determination circuit coupled to the communication host is configured to determine whether the communication host operates in the reception mode or the transmission mode so as to generate a determination result. The switching circuit, coupled to the logic determination circuit, is configured to selectively couple to the first antenna element or the second antenna element based on the determination result.

Abstract: An electronic apparatus and a method for switching touch modes thereof are provided. A touch screen of the electronic apparatus has a plurality of touch modes. A current touch mode of the touch screen is one of the plurality of touch modes. The method includes the following steps. Firstly, the number of times a key module of the electronic apparatus is pressed is determined according to a pulse count of a trigger signal provided by the key module. Next, a first touch mode of the plurality of touch modes is looked up in a lookup table according to the number of times. Afterwards, the current touch mode of the touch screen is switched to the first touch mode.

Abstract: A circuit board with an electrostatic discharge protection mechanism and an electronic apparatus having the same are provided. The circuit board includes a substrate, at least one signal trace, and a conductive element. The at least one signal trace is disposed on the substrate. The conductive element is electrically connected to a ground plane of the substrate and crosses over the at least one signal trace. The conductive element has at least one discharging portion. The position of the at least one discharging portion corresponds to the at least one signal trace. A gap exists between the at least one discharging portion and the at least one signal trace. A static electricity of the at least one signal trace is discharged to the at least one discharging portion.

Abstract: A pin-covering apparatus applied to a plurality of pins of an emitting end of a bi-directional optical module comprises a plurality of mediums and a plurality of metal sleeves. The mediums respectively cover the pins. The metal sleeves cover the mediums by taking the pins as centers, respectively. The metal sleeves are disposed at the emitting end of the bi-directional optical module. A bi-directional optical device using the pin-covering apparatus is also disclosed.

Abstract: An electronic apparatus and a light-emitting module driving circuit thereof are provided. The electronic apparatus includes a light-emitting module and a driving circuit. The driving circuit is coupled to the light-emitting module and is configured to generate a driving signal set to drive the light-emitting module. The driving circuit includes a first driver, a second driver, and a switching circuit. The first driver receives a control signal related to an operation status of the electronic apparatus and generates a first signal set according to the control signal. The second driver includes at least one resistor which receives system power and accordingly generates a second signal set. The switching circuit is coupled to the first driver and the second driver to receive the first signal set and the second signal set, respectively. When the switching circuit does not receive the first signal set, the switching circuit takes the second signal set as the driving signal set.

Abstract: A power over Ethernet device is provided. The power over Ethernet device includes a first Ethernet connector, an Ethernet transformer circuit, and a detection circuit. The first Ethernet connector is coupled to a second Ethernet connector of a network device via an Ethernet cable and has a first reserve pin and a second reserve pin. The Ethernet transformer circuit is coupled to the first Ethernet connector to provide a supply voltage to the Ethernet cable to transfer the supply voltage to the network device. The detection circuit receives the supply voltage and is coupled to the Ethernet transformer circuit, the first reserve pin, and the second reserve pin to provide a reference voltage to the first reserve pin and receives an identification voltage from the second reserve pin to determine whether the network device is a powered device.

Abstract: A surface-mount device includes a first electrode, a second electrode, a third electrode, a fourth electrode, a first impedance layer, and a second impedance layer. The first impedance layer is disposed between the first electrode and the second electrode, and is electrically connected to the first electrode and the second electrode in a first direction. The second impedance layer is disposed between the third electrode and the fourth electrode, and is electrically connected to the third electrode and the fourth electrode in a second direction perpendicular to the first direction, and the second impedance layer is interlaced with and electrically isolated with the first impedance layer.

Abstract: A casing structure including a first housing, a glue layer, and a second housing is provided. The first housing has a first inner edge. The glue layer is disposed at the first inner edge. The second housing has a second inner edge. The first housing is assembled to the second housing, and the first inner edge is aligned with the second inner edge. The glue layer abuts against the second inner edge so as to combine the first housing with the second housing. A gap formed between the glue layer and a part of the second inner edge is defined as a glue overflow buffer area.

Abstract: A circuit board assembly includes a circuit board, a shielding frame, a chip, and a heat dissipating member. The shielding frame is fixed to and protrudes from the circuit board. The shielding frame includes a first encircled positioning portion away from the circuit board. The chip is disposed on the circuit board and is located in the shielding frame. The heat dissipating member is detachably disposed on the shielding frame, and includes a plate and a second encircled positioning portion disposed on the plate. When the heat dissipating member is disposed on the circuit board, the plate leans against the shielding frame and covers the chip, the second encircled positioning portion and the first encircled positioning portion correspond with each other in shape and position, so as to position the plate and the shielding frame. A shielding device is also disclosed.

Abstract: A discharge apparatus is provided. A second discharge path is provided by a second discharge circuit started by a voltage across on a first discharge path provided by a first discharge circuit, so as to discharge a load capacitor.

Abstract: A wireless communication device includes a metallic housing, a circuit board, a metallic heat sink, and first, second and third antennas. The metallic housing includes a chamber. The circuit board is disposed in the chamber for providing a feed signal. The metallic heat sink is disposed on the circuit board and divides the chamber into first and second regions. The first antenna is disposed at the first region along a first direction. The second antenna is disposed at the second region along a second direction perpendicular to the first direction. The third antenna is disposed at the second region along the first direction and located between the metallic heat sink and the second antenna. The first, second and third antennas are coupled with the circuit board. The first, second and third antennas receive the feed signal and at least are capable of generating signals at the same frequency band.

Abstract: A display device includes a flexible display panel and a housing. The housing includes connectors and couplers. Each of the connectors includes two accommodating slots. The connectors and the couplers are sequentially arranged in a staggered manner and connected with one another. Each of the couplers includes a coupling body and two cylinders. The two cylinders are connected to two sides of the coupling body. Each of the cylinders is disposed in the accommodating slot of the adjacent connector. A radial interval of an opening of the accommodating slot is greater than a thickness of the coupling body and is less than a diameter of the cylinder. While the housing is being bent along with the flexible display panel, the adjacent two connectors are being away from each other until the cylinder in the accommodating slot is blocked by the corresponding opening.

Abstract: A circuit board module for being assembled to a case is provided. The circuit board module includes an electronic connector and a circuit board. The electronic connector is fixed to the circuit board. The circuit board has at least one first slot. The at least one first slot is configured for a fixing element to pass through and for the circuit board to be assembled to a case. The size of the at least one first slot allows the fixing element to move in a direction parallel to a surface of the circuit board in the at least one first slot. An electronic device having the circuit board module is also provided.

Abstract: A filter circuit includes a signal input terminal, a gas discharging tube, a signal output terminal, and a filter. The signal input terminal is configured to receive a communication signal. The gas discharging tube is coupled between the signal input terminal and a natural ground terminal. The signal output terminal is configured to provide a filtered communication signal. The filter is coupled between the signal input terminal and the signal output terminal. The filter includes a first high voltage capacitor, a second high voltage capacitor, and a main filter element. The first high voltage capacitor is coupled between the signal input terminal and an electronic ground terminal. The second high voltage capacitor is coupled between the signal output terminal and the electronic ground terminal. The main filter element is coupled between the signal input terminal and the signal output terminal.

Abstract: A driving circuit and an electronic apparatus having the same are provided. The electronic apparatus includes a load circuit and the driving circuit. The driving circuit is coupled to the load circuit. The driving circuit includes a voltage-divider circuit and a converting circuit. The voltage-divider circuit is configured to receive N control signals and divides voltages of the N control signals to generate a first voltage, wherein N is an integer greater than or equal to two. The converting circuit is coupled to the voltage-divider circuit to receive the first voltage, converts the first voltage into a driving voltage, and drives the load circuit according to the driving voltage.

Abstract: A circuit for preventing surge and an electronic apparatus having the same are provided. The circuit for preventing surge is configured to serve as a surge discharging path of the signal path so as to protect the device body. The circuit for preventing surge includes first and second discharging circuits. The first discharging circuit is coupled between the signal path and a ground terminal. The first discharging circuit is turned on in response to a transient surge voltage on the signal path so as to discharge the transient surge voltage to be a first surge voltage. The second discharging circuit is connected to the first discharging circuit in parallel. When a voltage difference between the first surge voltage and a voltage of the ground terminal is greater than or equal to a threshold voltage, the second discharging circuit is turned on to discharge the first surge voltage.

Abstract: A portable electronic device includes a first body, a second body, a pivoting mechanism, a linking mechanism, and a first speaker unit. The pivoting mechanism is pivoted between the first body and the second body and includes a first rotating shaft, a second rotating shaft, and a third rotating shaft, and the third rotating shaft has a mounting portion. The linking mechanism includes a first rolling member and a second rolling member. The first rolling member is connected to the third rotating shaft of the pivoting mechanism, and the second rolling member is connected to the second rotating shaft of the pivoting mechanism. The first rolling member and the second rolling member roll relative to each other within an angle range. The first speaker unit is fixed to the mounting portion.

Abstract: A shielding case includes a first casing, a second casing, a first electromagnetic shielding layer, and a second electromagnetic shielding layer. The second casing is disposed at the first casing to be opened or closed with respect to the first casing. The first electromagnetic shielding layer is disposed at the first casing. The second electromagnetic shielding layer is disposed at the second casing. When the first casing and the second casing are in a closed state, an accommodating space is formed between the first casing and the second casing, and the accommodating space is surrounded by the first electromagnetic shielding layer and the second electromagnetic shielding layer.

Abstract: An antenna structure including a metal outer cover and an antenna assembly is provided. The metal outer cover has a bent slit. The antenna assembly is stacked on the metal outer cover and covers a portion of the bent slit. The antenna assembly includes a substrate and an antenna pattern disposed on the substrate. The antenna pattern includes a feed end, a first ground end and a second ground end. In the antenna pattern, a first loop and a second loop are formed from the feed end to the first ground end in two respective paths. A third loop is formed from the feed end to the second ground end. The first loop and the third loop resonate with the bent slit to generate a low frequency band and a portion of a high frequency band. The second loop and the third loop resonate with the bent slit to generate another portion of the high frequency band. An electronic device having the antenna structure is further provided.