Abstract: An electronic device may be provided with peripheral conductive housing structures having first and second segments. A flexible printed circuit may have a first tail that extends along the first and second segments and a second tail that extends along the first segment. A conductive trace on the first tail may be coupled to an antenna feed terminal on the second segment. A conductive trace on the second tail may couple the conductive trace on the first tail to the first segment. A tuner and filters may be disposed on the flexible printed circuit and may be coupled to the conductive traces. The conductive trace on the second tail may have a tapered width. An antenna in the device may have a resonating element that includes both the first and second segments, thereby allowing the antenna to exhibit a wide bandwidth from 1.1-5 GHz.

Abstract: A mouse pad device is provided. The mouse pad device includes a mouse pad body, a first mouse pad secondary resonant circuit, and a second mouse pad secondary resonant circuit. The first mouse pad secondary resonant circuit receives an external wireless power from a wireless power supply. The second mouse pad secondary resonant circuit receives a relay wireless power from the first mouse pad secondary resonant circuit. The first mouse pad secondary resonant circuit and the second mouse pad secondary resonant circuit are arranged in the mouse pad body. The first mouse pad secondary resonant circuit provides a first wireless power to the mouse device. The second mouse pad secondary resonant circuit provides a second wireless power to the keyboard device according to the relay wireless power.

Abstract: Disclosed are an LED illumination apparatus and its manufacturing method. A metal sheet is stamped to form a conductive plate with 3D space, and the conductive plate includes an illumination circuit, and a support frame for supporting the conductive plate to form different types of illumination apparatuses. The support frame is provided for supporting and fixing the conductive plate to facilitate the conductive plate to form a 3D curved surface, and an LED chip soldering point protection mechanism is provided for protecting each LED chip soldering point, so that the illumination apparatus is applicable for mass production to improve the yield rate and meet the high heat dissipation efficiency, large-range illumination, material saving, lightweight and/or environmental protection requirements.

Abstract: A relay driving device includes first and second power supply modules, a switching circuit, and a control module. The first power supply module outputs a first voltage that has a magnitude sufficient to activate the relay. The second power supply module outputs a second voltage that has a magnitude sufficient to maintain an activated state of the relay. The control module is configured to control the switching circuit to connect the relay to the first power supply module so as to provide the first voltage to the relay for activating the relay, and to subsequently connect the relay to the second power supply module so as to provide the second voltage to the relay for maintaining the activated state of the relay.

Abstract: A relay driving device includes first and second power supply modules, a switching circuit, and a control module. The first power supply module outputs a first voltage that has a magnitude sufficient to activate the relay. The second power supply module outputs a second voltage that has a magnitude sufficient to maintain an activated state of the relay. The control module is configured to control the switching circuit to connect the relay to the first power supply module so as to provide the first voltage to the relay for activating the relay, and to subsequently connect the relay to the second power supply module so as to provide the second voltage to the relay for maintaining the activated state of the relay.

Abstract: A core unit includes first and second core elements. The first core element includes a first peripheral portion and a first leakage inductance portion that is confined by the first peripheral portion and that has a first end surface. The second core element includes a second peripheral portion and a second leakage inductance portion that is confined by the second peripheral portion and that has a second end surface. The first and second peripheral portions are connected to each other, and the first and second end surfaces are disposed to face each other and are spaced apart from each other so as to form a gap therebetween. At least one of the first and second end surfaces is a non-level surface.

Abstract: A distributed fiber-grating-based sensing system, the system comprises one or more scanned birefringence fiber interferometers to detect the small wavelength shift of the light reflected from the fiber grating, a wavelength demultiplexer to separate the lights from each fiber grating, a reference fiber grating for determining the absolute optical wavelengths. Compared with the prior art, the system has advantages of easier fabrication, better stabilization, and can be customized for different applications.