Electronic paper writing device and receiving unit for electronic paper

摘要

The present invention concerns a receiving unit and a writing device which can be used in conjunction with an electronic paper display system. The writing device transmits power and baseband signals by using an electromagnetic coupling between a coil of the writing device and a coil of the electronic paper. The baseband signals, which are encoded by the writing device, are decoded by a decoder of the electronic paper and fed to a control circuit to illustrate images on a bi-stable display unit, the control circuit and the display unit being part of the electronic paper. The electronic paper has a power storage means that temporarily stores power transmitted by using the electromagnetic coupling for absorbing fluctuations of power in both transmission and consumption. The asynchronous design of this invention brings both robustness and low-power consumption.