Abstract: An electronic device including a metal casing and at least one antenna module is provided. The metal casing includes at least one window. The at least one antenna module is disposed in the at least one window. The at least one antenna module includes a first radiator and a second radiator. The first radiator includes a feeding end, a first ground end joined to the metal casing, a second ground end, a first portion extending from the feeding end to the first ground end, and a second portion extending from the feeding end to the second ground end. A first coupling gap is between the second radiator and the first portion. A second coupling gap is between at least part of the second radiator and the metal casing, and the second radiator includes a third ground end joined to the metal casing.

Abstract: An antenna module includes a first metal plate and a frame body. The frame body surrounds the first metal plate. The frame body includes a first antenna radiator, a second antenna radiator, a third antenna radiator, a first breakpoint and a second breakpoint. The first antenna radiator includes a first feeding end and excites a first frequency band. The second antenna radiator includes a second feeding end and excites a second frequency band. The third antenna radiator includes a third feeding end and excites a third frequency band. The first breakpoint is located between the first antenna radiator and the second antenna radiator. The second breakpoint is located between the second antenna radiator and the third antenna radiator. An electronic device including the above-mentioned antenna module is also provided.

Abstract: An electronic device including a bracket and an antenna is provided. The bracket includes first, second, third, and fourth surfaces. The antenna includes a radiator. The radiator includes first, second, third, and fourth portions. The first portion is located on the first surface and includes connected first and second sections. The second portion is located on the second surface and includes third, fourth, fifth, and sixth sections. The third section, the fourth section, and the fifth sections are bent and connected to form a U shape. The third portion is located on the third surface and is connected to the second section and the fourth section. The fourth portion is located on the fourth surface and is connected to the fifth section, the sixth section, and the third portion. The radiator is adapted to resonate at a low frequency band and a first high frequency band.

Abstract: An uninterruptible power supply includes a switching unit, a charging unit, an energy storage unit, a conversion unit, and a control unit. When an input power source is available, the switching unit provides a first output power source and the charging unit converts the input power source into a first power source to provide the first power source to the control unit and to charge the energy storage unit. When the input power source is not available, the conversion unit converts the electricity of the energy storage unit into a second output power source and provides the second output power source. When the input power source is not available, the conversion unit provides a second power source to the charging unit so that the charging unit converts the second power source into the first power source and provides the first power source to the control unit.

Abstract: An uninterruptible power supply includes a switching unit, a charging unit, an energy storage unit, a conversion unit, and a control unit. When an input power source is available, the switching unit provides a first output power source and the charging unit converts the input power source into a first power source to provide the first power source to the control unit and to charge the energy storage unit. When the input power source is not available, the conversion unit converts the electricity of the energy storage unit into a second output power source and provides the second output power source. When the input power source is not available, the conversion unit provides a second power source to the charging unit so that the charging unit converts the second power source into the first power source and provides the first power source to the control unit.

Abstract: An electronic appliance includes a housing, a light module installed inside the housing, an optical sensor installed inside the housing for sensing external light so as to generate a first color signal of a first color space, an image processor for converting the first color signal transmitted from the optical sensor into a second color signal of a second color space, and a controller for adjusting an input voltage of the light module according to the second color signal so as to adjust luminance of the light module.

Abstract: An antenna matching system is used in a flip style mobile unit. The flip style mobile unit can be operated in an open status or in a closed status. The antenna matching system includes an antenna for receiving/transmitting an RF signal, a first matching circuit for operating the antenna in a first matching mode, a second matching circuit for operating the antenna in the second matching mode, and a switch for switching the antenna between the first matching mode and the second matching mode according to whether the flip style mobile unit is in the open status or in the closed status.

Abstract: An adjustable liquid crystal display device comprises a liquid crystal display (refers to LCD), a light source, a first polarizer, and a second polarizer. The LCD has a light-receiving surface and a light-emitting surface, and shows the image and the characters. The light source emits a light toward the light-receiving surface of the liquid crystal display. The first polarizer locates between the light source and the LCD, and converts the light into a polarized light that can pass through the LCD. The second polarizer locates on the same side with the light-emitting surface of the liquid crystal display.