Abstract: An electromagnetic interference eliminating apparatus includes a multi-stage filter that is composed of inductors, capacitors and resistors, and an active filter. The multi-stage filter receives an input signal and provides an eliminating band to eliminate the noise in the input signal. The active filter is connected with the multi-stage filter for buffering the input signal that has been eliminated and exactly outputting an output signal.

Abstract: A foldable electronic apparatus including a first body, a second body, a transmitting module and a supporting portion is provided. The first body has a transmitting structure and is pivoted to the second body along a first rotational axis. The transmitting module is disposed in the second body and corresponds to the transmitting structure. In addition, one side of the supporting portion is pivoted to the second body along a second rotational axis, and the other side of the supporting portion is connected to the transmitting module.

Abstract: An electronic device including a housing, a keyboard module, and a limiting plate is provided. The housing has an accommodation slot including a carrying portion, at least one opening penetrating the carrying portion, and a wedging portion located on the edge of the opening. The keyboard module includes a keyboard disposed in the accommodation slot and at least one wedging element. The keyboard has a first surface facing the carrying portion and a second surface with multiple keys. The wedging element is disposed on the first surface and corresponding to the wedging portion. The wedging portion is limited between the wedging element and the first surface in a first direction perpendicular to the first surface. The limiting plate is disposed in the accommodation slot to limit a displacement of the keyboard module in a second direction.

Abstract: The present invention focuses on the development of a high-performance solar photovoltaic (PV) energy conversion system. The power circuit of the invention is made of a two-stage circuit, connecting a step-up DC-DC converter and a full-bridge inverter in serial. The present invention uses an adaptive perturbation and observation method to increase tracking speed of maximum power position and at the same time reduces energy loss. In addition, the full-bridge inverter's output has to have the same phase with the utility power in order to achieve unit power factor and increase the system efficiency. The present invention uses voltage type current control full-bridge inverter to achieve the goal of merging into utility grid. The present invention provides an active Sun tracking system, by utilizing the character of changing in open circuit output voltage with Sun radiation strength to follow the Sun, and decreases the system cost and increases system effectiveness.

Abstract: A case structure of an electronic device comprises a first shell, a second shell, a first engagement element, a second engagement element, a first spring element, a second spring element and a plug element. The first engagement element protrudes from the first shell. The second shell having a first penetrating opening allows the first engagement element to pass through. The second engagement element having a button portion passes through a second penetrating opening of the second shell. The second engagement element is driven by the button portion and the first spring element to control the second engagement element and the first engagement element to engage or disengage from each other. The plug element located in the second shell is pushed for filling in the first penetrating opening by the second spring element.

Abstract: A foldable electronic apparatus including a first body, a second body, a transmitting module and a supporting portion is provided. The first body has a transmitting structure and is pivoted to the second body along a first rotational axis. The transmitting module is disposed in the second body and corresponds to the transmitting structure. In addition, one side of the supporting portion is pivoted to the second body along a second rotational axis, and the other side of the supporting portion is connected to the transmitting module.

Abstract: The present invention focuses on the development of a high-performance solar photovoltaic (PV) energy conversion system. The power circuit of the invention is made of a two-stage circuit, connecting a step-up DC-DC converter and a full-bridge inverter in serial. The present invention uses an adaptive perturbation and observation method to increase tracking speed of maximum power position and at the same time reduces energy loss. In addition, the full-bridge inverter's output has to have the same phase with the utility power in order to achieve unit power factor and increase the system efficiency. The present invention uses voltage type current control full-bridge inverter to achieve the goal of merging into utility grid. The present invention provides an active Sun tracking system, by utilizing the character of changing in open circuit output voltage with Sun radiation strength to follow the Sun, and decreases the system cost and increases system effectiveness.

Abstract: A case structure of an electronic device comprises a first shell, a second shell, a first engagement element, a second engagement element, a first spring element, a second spring element and a plug element. The first engagement element protrudes from the first shell. The second shell having a first penetrating opening allows the first engagement element to pass through. The second engagement element having a button portion passes through a second penetrating opening of the second shell. The second engagement element is driven by the button portion and the first spring element to control the second engagement element and the first engagement element to engage or disengage from each other. The plug element located in the second shell is pushed for filling in the first penetrating opening by the second spring element.

Abstract: The present invention provides a portable device with an integrated wireless earphone. According to the present invention, a trench is formed in the main part. The shape and scale of the trench is related to the wireless earphone so as to collect and fix the wireless earphone in the trench to avoid losing the wireless earphone.