Abstract: A computer system including an electronic device and an input device is disclosed. The electronic device includes a touch display area and a control unit. The input device includes a plurality of positioning structures and a grounding piece. The positioning structures are electrically connected to the grounding piece. When the input device is disposed on the touch display area of the electronic device, the control unit detects positions of the positioning structures on the touch display area, calculates a coverage area covered by the input device on the touch display area according to the positions, and determines a range of a display area of the touch display area according to the coverage area.

Abstract: A computer system including an electronic device and an input device is disclosed. The electronic device includes a touch display area and a control unit. The input device includes a plurality of positioning structures and a grounding piece. The positioning structures are electrically connected to the grounding piece. When the input device is disposed on the touch display area of the electronic device, the control unit detects positions of the positioning structures on the touch display area, calculates a coverage area covered by the input device on the touch display area according to the positions, and determines a range of a display area of the touch display area according to the coverage area.

Abstract: A computer system including an electronic device and an input device is disclosed. The electronic device includes a touch display area and a control unit. The input device includes a plurality of positioning structures and a grounding piece. The positioning structures are electrically connected to the grounding piece. When the input device is disposed on the touch display area of the electronic device, the control unit detects positions of the positioning structures on the touch display area, calculates a coverage area covered by the input device on the touch display area according to the positions, and determines a range of a display area of the touch display area according to the coverage area.

Abstract: A computer system including an electronic device and an input device is disclosed. The electronic device includes a touch display area and a control unit. The input device includes a plurality of positioning structures and a grounding piece. The positioning structures are electrically connected to the grounding piece. When the input device is disposed on the touch display area of the electronic device, the control unit detects positions of the positioning structures on the touch display area, calculates a coverage area covered by the input device on the touch display area according to the positions, and determines a range of a display area of the touch display area according to the coverage area.

Abstract: The driving device utilizing inertia mainly contains a battery, a motor, a flywheel, a casing, a transmission box, a casing, a generator, a rectifier, and a charger. The flywheel is mounted on a shaft and is housed in a vacuum chamber through shaft seal. The flywheel freely spins by itself after actuated by the motor. The flywheel's torque is then delivered to the transmission box which in turn delivers the torque to drive a vehicle such as automobile, vessel, plane, submarine, etc. On the other hand, the spinning flywheel drives the generator to produce electricity which is stored in the battery series-connected to the generator via the rectifier and the charger. As such, the driving device is able to power the vehicle while the surplus energy is stored in the battery for activating the motor and turning the flywheel to spin.

Abstract: A dual conic-shaped flying wheel is disclosed. The first and the second conic housings are combined together and the interior of the two housings are filled with a filler such as cement mixture or lead.