Abstract: A resonant vibration actuator is provided, comprising: a casing, a mover, a plurality of electromagnet sets, two elastic suspensions, and a connecting circuit; the casing is provided with connection terminals for connection on the outside; the mover comprising: a mover frame, a plurality of permanent magnet units, two magnetic backs, the permanent magnet units and the magnetic backs being arranged in the mover frame; the electromagnet sets being arranged between two permanent magnet units of the mover; the elastic suspensions being connected to the casing and the mover respectively through two connection portions at both ends; the connecting circuit being used to connect the electromagnet set and the connection terminals outside the casing; wherein, by energizing the electromagnet set, the electromagnet acts on the permanent magnet unit to make the mover move relatively in the casing to generate vibration.

Abstract: An easy-adjustment bicycle gear-shifting system consisting of a microcontroller unit, a memory, a driver and a derailleur is disclosed. The memory has stored therein more than three position tables each containing the position information of the derailleur relative to the chainrings. The position information contained in one position table has a part or all different from the position information contained in every other position table. The position tables are arranged one after another in a proper order corresponding to one same chainring in such a manner that every two adjacent position tables are differed by a distance value corresponding to one same chainring. The microcontroller unit selects one position table, and drives the driver to shift the derailleur to the corresponding position according to the position information of the selected position table.

Abstract: An easy-adjustment bicycle gear-shifting system consisting of a microcontroller unit, a memory, a driver and a derailleur is disclosed. The memory has stored therein more than three position tables each containing the position information of the derailleur relative to the chainrings. The position information contained in one position table has a part or all different from the position information contained in every other position table. The position tables are arranged one after another in a proper order corresponding to one same chainring in such a manner that every two adjacent position tables are differed by a distance value corresponding to one same chainring. The microcontroller unit selects one position table, and drives the driver to shift the derailleur to the corresponding position according to the position information of the selected position table.

Abstract: An electric outlet power control device includes an electric outlet strip having female receptacles for providing electricity to a host computer and computer peripheral apparatuses, and a control module having a sensor for sensing the current signal of the host computer and an electric switch member controllable by the sensor to cut off power supply from all the female receptacles when the host computer is off.

Abstract: A power control module installed in the power supply device of a computer for power control is disclosed to include an electric switch member for switching on/off power supply conduction between the power supply device and the motherboard of the computer, and a sensor for sensing the power-on/off current signal of the motherboard of the computer and driving the electric switch member to switch off power supply conduction between the power supply device and the motherboard of the computer when the user switched off the computer after work.

Abstract: Device and method capable of dynamically displaying digital images by coordinate conversion on a virtual plane are provided. The device includes a display unit, a storage unit, and a processing unit. The display unit includes a screen. The storage unit stores a digital image. The processing unit establishes a virtual plane including a display region corresponding to the screen of the display unit, projects the digital image on the virtual plane to form an image region, and decides a moving trace of the image region on the virtual plane. When the image region and the display region overlap, the processing unit calculates the overlap and displays a corresponding part of the digital image by reading from the storage unit on a corresponding part of the screen.

Abstract: A mobile power adapter having an electric socket for power input, multiple adapter ports for power output, a power supply unit for converting input power supply into desired output power supply for output through the adapter ports, and a monitoring unit for monitoring the temperature inside the mobile power adapter and the operation status of the power supply unit on electric voltage, electric current, power consumption status and total wattage for enabling the monitoring data to be displayed on a display screen on the outside wall of a housing of the mobile power adapter.

Abstract: A mobile power adapter having an electric socket for power input, multiple adapter ports for power output, a power supply unit for converting input power supply into desired output power supply for output through the adapter ports, and a monitoring unit for monitoring the temperature inside the mobile power adapter and the operation status of the power supply unit on electric voltage, electric current, power consumption status and total wattage for enabling the monitoring data to be displayed on a display screen on the outside wall of a housing of the mobile power adapter.

Abstract: Device and method capable of dynamically displaying digital images by coordinate conversion on a virtual plane are provided. The device includes a display unit, a storage unit, and a processing unit. The display unit includes a screen. The storage unit stores a digital image. The processing unit establishes a virtual plane including a display region corresponding to the screen of the display unit, projects the digital image on the virtual plane to form an image region, and decides a moving trace of the image region on the virtual plane. When the image region and the display region overlap, the processing unit calculates the overlap and displays a corresponding part of the digital image by reading from the storage unit on a corresponding part of the screen.