CORDLESS AND BATTERY-FREE KEYBOARD AND/OR POINTING DEVICE

摘要

The invention relates to a cordless and battery-free keyboard and/or pointing device which receives its power supply via a high-frequency alternating field. According to the invention data communication between the keyboard and/or pointing device and a data-processing device, such as a personal computer or Internet television set, is carried out by modulation of an energy-transmitting alternating field.