Abstract: A lighting device includes a light board and a light dimmer circuit. The light board includes multiple first light emitting elements and second light emitting elements. The first light emitting elements are disposed in a first area of the light board. The second light emitting elements are disposed in a second area of the light board. The light dimmer circuit is configured to drive the second light emitting elements to generate flickering lights from the second area of the light board, and is configured to drive the first light emitting elements to generate non-flickering lights from the first area of the light board.

Abstract: A method for performing a data exchanging process to exchange data includes the following steps: establishing a data operating unit, transferring an encryption key to a first terminal, receiving first data encrypted according to the encryption key from the first terminal, combining first subset data of the first data and second subset data of second data encrypted according to the encryption key in the data operating unit to form result data wherein the first subset data and the second subset data respectively have a common identifier, delivering the result data to the first terminal and terminating the data operating unit. Besides, a non-transitory computer-readable medium and a system to perform the method are disclosed.

Abstract: A lighting device includes a board, first light emitting elements and second light emitting elements. The first light emitting elements emit lights in a first spectral range. The second light emitting elements emit lights in a second spectral range. The second spectral range is narrow than the first spectral range. The first light emitting elements are disposed in at least one first area of the board, and the second light emitting elements are disposed in second areas of the board. The at least one first area and the second areas are alternatively arranged on the board.

Abstract: A method for tracking a moving human target and a device, the target tracking device comprises radar unit and camera unit. The method first obtains first positional information of a target through the radar unit, then obtains a display area image comprising the target through the camera unit based on the first positional information. Upon determining the target as human, the method determines whether an initial position of face of the target is centered within the display area image. If not centered, compensation is continuously applied to the radar unit from calculations on information as to orientations and distances from the radar unit and the camera unit, the radar unit and the camera unit being controlled to conduct face tracking of the moving target.

Abstract: A lighting device includes a light board and a light dimmer circuit. The light board includes multiple first light emitting elements and second light emitting elements. The first light emitting elements are disposed in a first area of the light board. The second light emitting elements are disposed in a second area of the light board. The light dimmer circuit is configured to drive the second light emitting elements to generate flickering lights from the second area of the light board, and is configured to drive the first light emitting elements to generate non-flickering lights from the first area of the light board.

Abstract: An Ethernet physical-layer circuit corresponding to a first port is connected to a first link partner device through the first port and a first Ethernet cable. The Ethernet physical-layer circuit and other physical-layer circuits all employ an output oscillation signal of a crystal oscillator to respectively generate clock waveforms, and they are configured in a master mode when the crosstalk noise is converged and compensated.

Abstract: A system and method for a second wireless device to establish distance and location of a first device which is transmitting radio waves includes the first and second devices. Each second device includes two or more (N in number) receiving antennas. An angle between the directions in which adjacent receiving antennas receive the strongest signals is 360°/N. The second device obtains a received signal strength indicator (RSSI) of each receiving antenna receiving signals from the first device, and from the two strongest receiving antennas, calculation of an angle between the first device and one of the adjacent receiving antennas can be performed. The distance between the first device and the second device can also be calculated.

Abstract: A method for adjusting direction of antenna for optimal radio reception, adapted to a communication device with a directional antenna. The method includes receiving a wireless signal output by a wireless signal source in a first direction at a predetermined location, and obtaining a first received power value corresponding to the first direction. A wireless signal output by the wireless signal source in a second direction is also received through the directional antenna and a second received power value corresponding to the second direction is also obtained. An optimal receiving angle according to the first received power value, the second received power value, a maximum gain value of the directional antenna, a first angle, and a second angle, is calculated and the direction of the directional antenna can be adjusted according to the optimal receiving angle.

Abstract: A method for adjusting direction of antenna for optimal radio reception, adapted to a communication device with a directional antenna. The method includes receiving a wireless signal output by a wireless signal source in a first direction at a predetermined location, and obtaining a first received power value corresponding to the first direction. A wireless signal output by the wireless signal source in a second direction is also received through the directional antenna and a second received power value corresponding to the second direction is also obtained. An optimal receiving angle according to the first received power value, the second received power value, a maximum gain value of the directional antenna, a first angle, and a second angle, is calculated and the direction of the directional antenna can be adjusted according to the optimal receiving angle.

Abstract: An Ethernet physical-layer circuit corresponding to a first port is connected to a first link partner device through the first port and a first Ethernet cable. The Ethernet physical-layer circuit and other physical-layer circuits all employ an output oscillation signal of a crystal oscillator to respectively generate clock waveforms, and they are configured in a master mode when the crosstalk noise is converged and compensated.

Abstract: A system and method for a second wireless device to establish distance and location of a first device which is transmitting radio waves includes the first and second devices. Each second device includes two or more (N in number) receiving antennas. An angle between the directions in which adjacent receiving antennas receive the strongest signals is 360°/N. The second device obtains a received signal strength indicator (RSSI) of each receiving antenna receiving signals from the first device, and from the two strongest receiving antennas, calculation of an angle between the first device and one of the adjacent receiving antennas can be performed. The distance between the first device and the second device can also be calculated.

Abstract: A system and method for a second wireless device to establish distance and location of a first device which is transmitting radio waves includes the first and second devices. Each second device includes two or more (N in number) receiving antennas. An angle between the directions in which adjacent receiving antennas receive the strongest signals is 360°/N. The second device obtains a received signal strength indicator (RSSI) of each receiving antenna receiving signals from the first device, and from the two strongest receiving antennas, calculation of an angle between the first device and one of the adjacent receiving antennas can be performed. The distance between the first device and the second device can also be calculated.

Abstract: A system and method for a second wireless device to establish distance and location of a first device which is transmitting radio waves includes the first and second devices. Each second device includes two or more (N in number) receiving antennas. An angle between the directions in which adjacent receiving antennas receive the strongest signals is 360°/N. The second device obtains a received signal strength indicator (RSSI) of each receiving antenna receiving signals from the first device, and from the two strongest receiving antennas, calculation of an angle between the first device and one of the adjacent receiving antennas can be performed. The distance between the first device and the second device can also be calculated.

Abstract: A smart phase switching method includes setting a first phase switching threshold, a convergence upper bound, and a convergence lower bound, sampling a received signal continuously for acquiring a phase offset accumulated value of the received signal during each period, updating the first phase switching threshold to generate a second phase switching upper bound threshold and a second phase switching lower bound threshold when a plurality of phase offset accumulated values of the received signal during a first predetermined time interval fall into a range from the convergence upper bound to the convergence lower bound, and sampling the received signal continuously for determining if a phase is switched to an opposite operating point according to a phase offset accumulated value of the received signal after the second phase switching upper bound threshold and the second phase switching lower bound threshold are generated.