Abstract: An image capturing device includes a main body, at least one light source, a lens, and at least one first light shielding structure. The light source disposed at the main body is suitable for providing a light beam to an outside of the main body. The lens disposed at the main body is suitable for capturing a light entering the lens from the outside of the main body. The first light shielding structure is disposed at the main body. The light beam turns into an actual output light beam after being shielded by the first light shielding structure. The first light shielding structure shields the light beam in a vertical direction more than it shields the light beam in a horizontal direction, so an actual vertical light emitting angle of the actual output light beam is smaller than an actual horizontal light emitting angle of the actual output light beam.

Abstract: A heating device is provided. A temperature sensing unit is configured to sense an ambient temperature and accordingly output a temperature sensing voltage. A driving unit is coupled to a heating transistor unit and the temperature sensing unit, and configured to drive the heating transistor unit for performing heating based on the temperature sensing voltage. An activating unit is coupled to the temperature sensing unit, configured to output an activating signal based on the temperature sensing voltage when a temperature of the printed circuit board has risen up to a preset temperature. The heating device as provided can assure that the activating signal can be normally outputted by the heating device under an ambient at an extremely low temperature.

Abstract: A doorbell system and a doorbell control device are provided. The doorbell system includes a doorbell control device, a transformer, and a doorbell interface device. The doorbell control device has a first pin, a second pin, and a third pin. The doorbell control device includes a speaker unit and a control unit. The control unit is configured to control whether or not the speaker unit produces sound according to a current or a voltage of the second pin. The first pin is coupled to the second pin. The transformer outputs an AC voltage to the first pin and the third pin of the doorbell control device. The doorbell interface device is coupled to the second pin and the third pin of the doorbell control device.

Abstract: A method for measurement control and a base station using the same are provided. The method includes the following steps. Divide a coverage range of the base station into multiple coverage areas according to a signal coverage state. Each coverage area has at least one signal state threshold value. Receive a signal state report from a user equipment to determine a current coverage area where the user equipment is located.

Abstract: A doorbell system and a doorbell control device are provided. The doorbell system includes a doorbell control device, a transformer, a doorbell interface device, and a chime device. The doorbell control device has a first pin, a second pin, a third pin, and a fourth pin. The doorbell control device is configured to control a conducting state between the first pin and the third pin according to a current or a voltage of the second pin. The first pin is coupled to the second pin. The transformer outputs an AC voltage to the first pin and the fourth pin of the doorbell control device. The doorbell interface device is coupled to the second pin and the fourth pin of the doorbell control device. The chime device is coupled to the third pin and the fourth pin of the doorbell control device.

Abstract: A method for measuring network throughput is provided. The method comprises the following steps: exchanging messages with a time synchronization protocol server in compliance with a time synchronization protocol, synchronizing a slave clock with a master clock of the time synchronization protocol server according to time information related to the messages, and calculating at least one network throughput according to the time information and size information related to the messages.

Abstract: An antenna structure and an electronic device using the same are provided. The antenna structure includes an antenna body and a washer body. The antenna body includes an annular metal sheet. The washer body is connected to one side of the annular metal sheet. The washer body has a screw hole. The annular metal sheet surrounds the washer body, and the annular metal sheet extends upward from the washer body.

Abstract: A dual-band antenna including a ground element, a short-circuit element, a feed element and a radiator is provided. The radiator includes a first connection segment, a first radiation element, a second radiation element, a third radiation element and a fourth radiation element. The dual-band antenna covers a first frequency band a second frequency band through the symmetrical first radiation element and second radiation element and the symmetrical third radiation element and fourth radiation element, so as to effectively decrease an antenna volume, and satisfy the requirement of a signal coverage range of a communication device.

Abstract: A broadband antenna is provided. In the broadband antenna, the first end of a first radiation member is connected to the first end of a second radiation member to form a first commonly-connected end, and the second end of the first radiation member is connected to the second end of the second radiation member to form a second commonly-connected end, wherein the first commonly-connected end has a feed point, the second commonly-connected end is connected to a ground member, and the first radiation member is surrounded by the second radiation member and is spaced apart from the second radiation member by a gap. As a result, the broadband antenna can provide 2 frequency bands, each having ½ wavelength resonant mode in a frequency range less than 1 GHz, without the occurrence of resonant mode degradation.

Abstract: An automatic frequency calibration method and a small cell using the same are provided. The automatic frequency calibration method comprises the following steps. A set of at least one broadcasting message in a surrounding environment is received. Whether part of the at least one broadcasting message is transmitted from at least one first type base station is determined. If part of the at least one broadcasting message is transmitted from the first type base station, then a frequency of the small cell is calibrated according to one of the at least one first type base station whose signal strength is maximum among all of the at least one first type base station. If all of the at least one broadcasting message are not transmitted from the first type base station, the frequency of the small cell is calibrated according to at least one second type base station.

Abstract: A shielding clip and an electronic device are provided. The electronic device includes a circuit board, an electronic element, a shielding cover and the shielding clip. The shielding clip comprises a bottom plate parallel to the circuit board. The bottom plate has a first side region and a second side region. The first side region has a first pin extending into the circuit board and a first buckle plate extending away from the circuit board to buckle the shielding cover. The second side region has a second pin extending into the circuit board and a second buckle plate extending away from the circuit board to buckle the shielding cover.

Abstract: A doorbell device is provided. The doorbell device includes a user interface, a control circuit, a power switching circuit, a first capacitor, a second capacitor, and a charge/discharge control circuit. The user interface includes a button. The control circuit is coupled to the user interface and generates a power control signal according to a state of the button. The power switching circuit is coupled to the control circuit and outputs a first voltage signal at a first node to supply power to the control circuit according to the power control signal. The first capacitor is coupled to the first node. The charge/discharge control circuit is coupled between the first node and the second capacitor and controls whether the second capacitor is charged or discharged according to the first voltage signal.

Abstract: A heat conductive plastic radiator and a communication device are provided. The communication device includes the heat conductive plastic radiator, a communication chip and an antenna. The heat of the communication chip is dissipated by the heat conductive plastic radiator. Along any direction, the heat conductive plastic radiator has a plurality of cross-sections perpendicular to the direction, and the plurality of cross-sections have different shapes. Therefore, one of the advantages of the heat conductive plastic radiator is that it less severely interferes with the antenna while efficiently dissipating heat.

Abstract: A network device is provided. The network device is connected to a number of slave network devices. Each slave network device communicates with the network device by using an Internet protocol (IP) address. The network device includes an Internet protocol security (IPsec) module and a network address translation (NAT) module. The IPsec module establishes an IPsec tunnel to a network gateway in the Internet and retrieves an IPsec IP address corresponding to the IPsec tunnel. The NAT module converts the IP addresses of the slave network devices to the IPsec IP address, such that the slave network devices use the IPsec IP address to communicate with the network gateway through the IPsec tunnel.

Abstract: A method for maintaining network connection of a network device includes the following steps. Firstly, a step (a) is performed to determine whether a connection status between the network device and a remote device is disconnected. An application layer is automatically restarted if the connection status is determined to be disconnected. Then, a step (b) is performed to determine whether the connection status is still disconnected after the application layer is automatically restarted. If the connection status is still disconnected after the application layer is automatically restarted, a network protocol layer is automatically restarted. Then, a step (c) is performed to determine whether the connection status is still disconnected after the network protocol layer is automatically restarted. If the connection status is still disconnected after the network protocol layer is automatically restarted, the network device is automatically rebooted.

Abstract: A wireless communication device for transceiving heterogeneous radio-frequency (RF) signals is provided. The wireless communication device includes a first antenna, a second antenna, a first transceiver, a second transceiver and a controller. The first transceiver controls the first antenna through a first transceiving path to transceive a first RF signal according to a first wireless communication standard. The second transceiver controls the second antenna through a second transceiving path to transceive a second RF signal according to a second wireless communication standard. In a joining process when the wireless communication device establishes connection to an end device according to the second wireless communication standard, the controller reduces transmission power for transmitting the first RF signal, or reduces sensitivity for receiving the second RF signal.

Abstract: A data stream generation and transmission system is provided. The system includes a cable, a data stream generation device, and a wireless transmission device connected to the data stream generation device through the cable. The data stream generation device includes a storage component and a data stream generation module. The storage component stores wireless network configuration data. The data stream generation module generates a data stream. The wireless transmission device includes a wireless module, wherein the data stream generation device is adapted to send the wireless network configuration data and the data stream to the wireless transmission device through the cable, and the wireless transmission device is adapted to use the wireless network configuration data to configure the wireless module and use the wireless module to transmit the data stream wirelessly.

Abstract: An IP camera is provided. The IP camera includes a camera lens, an imaging unit, an IR cut filter, a motor, and a control circuit. The motor controls the position of the IR cut filter. The control circuit outputs a first pulse signal to drive the motor to move the IR cut filter such that light that passes through the camera lens reaches the imaging unit without passing through the IR cut filter. The control circuit controls the motor and prevents the motor from heat-related damage.

Abstract: A patch antenna includes an irradiation plate, a grounding point and a feeding point. The irradiation plate has a long edge. The grounding point is located at the long edge. The feeding point is located at the long edge. The grounding point and the feeding point are symmetrical with respect to a center of the long edge.