Abstract: A voltage is supplied from an image writing apparatus to the power receiving electrode of an electronic paper and an optical signal is applied to light receiving elements of the electronic paper from the LEDs of the image writing apparatus. Then, the light receiving elements perform a switching operation to apply the voltage to row electrodes and column electrodes of a display unit including a plurality of pixels, thus making display.

Abstract: Use right processing for mere viewing and listening of information and utilization right processing for utilization in users' own works can be separately performed, thereby reducing useless right processing in the process of creation and efforts to negotiate singly with an author for right processing. Virtual electronic information manipulation spaces are created on a network and managed by a management part. Information within the spaces is accumulated by an information accumulation part. An information manipulation space control part presents the virtual electronic information manipulation spaces to users while communicating with the management part over the network and obtains information managed by the management part by users' operations. Information in the information manipulation spaces is manipulated by an information manipulation part. When information is transferred out of the information manipulation spaces, right processing is performed by a right processing part.