Patent ID: 8068098

Claim:
An electronic paper recording apparatus comprising an electronic paper and a paper mounting unit on which the electronic paper is mounted detachably, the electronic paper including a nonvolatile display unit which uses the paper surface as a nonvolatile display screen, an overlap detecting unit which detects whether another electronic paper is overlapped with the surface of the electronic paper, a mounting state notifying unit which notifies the paper mounting unit that the paper has been mounted so as to correspond to a pad surface of a pad structure unit of the paper mounting unit, a paper size storage unit which stores size information on the electronic paper, and a communication unit which transmits and receives a signal to and from the paper mounting unit, and the paper mounting unit including the pad structure unit which acts as a pad placed under the electronic paper when the paper is mounted including the pad surface, a communication unit which transmits and receives a signal to and from the electronic paper, an operation position detecting unit which detects a user operation position with respect to the display screen of the electronic paper mounted on the pad structure unit, a valid paper determining unit which determines an electronic paper of a minimum size mounted so as to correspond to the pad surface with no overlap to be a valid electronic paper on the basis of an overlap detection signal received from the overlap detecting unit of the electronic paper via the communication unit, the mounting state at the pad structure unit notified by the mounting state notifying unit, and the paper size information read from the paper size storage unit via the communication unit, and a display control unit which transmits data corresponding to the user operation position with respect to the display screen of the electronic paper detected by the operation position detecting unit to the electronic paper determined to be valid by the valid paper determining unit via the communication unit and causes the nonvolatile display unit of the electronic paper to display the data.