POWERLESS WIRELESS KEY BOARD AND SYSTEM THEREOF

摘要

PURPOSE: A wireless and portable keyboard and a keyboard system thereof are provided to reduce the weight of the keyboard by operating the keyboard with an electromagnetic wave transmitted from a wireless and portable keyboard reader. CONSTITUTION: A power management module(330) is connected to an RF(Radio Frequency) communication module(320). A key signal generating module(340) is connected to the power management module and the RF communication module and includes keys. The RF communication module receives wireless power transmitted from a wireless and portable keyboard reader(200) with an RF power transmission method through an antenna, converts the wireless power into DC power, and transmits the DC power to the power management module. The key signal generating module transmits an input signal of the key signal generating module to the wireless and portable keyboard reader through the antenna with the RF power transmission method. The power management module regulates the DC power to transmit the power to the key signal generating module. [Reference numerals] (200) Wireless and portable keyboard reader; (320) RF communication module; (330) Power management module; (340) Key signal generating module