Patent ID: 8243110

Claim:
An optical writing device that performs optical writing on an exposure region of a light writing display medium in which a light-conductive layer is laminated at a display layer, the optical writing device comprising: an accommodation section at which a plurality of the media are stacked; a light irradiation member that performs light irradiation at a medium, of the plurality of media, of which the exposure region is exposed, the light irradiation member moving in a first direction while irradiating light bearing image information, and irradiating light for image erasure while moving in a second direction, which is opposite to the first direction; a voltage application member that connects with, of the plurality of media, the medium that is irradiated with light by the light irradiation member, and applies a voltage required for times of optical writing to the medium that is irradiated with light by the light irradiation member; a medium conveyance member that, simultaneously with the movement of the light irradiation member in the second direction, conveys, of the plurality of media, the medium for which the irradiation with light bearing image information has been performed, in the second direction; and a control section that performs control for the voltage application member applying voltage to a first medium, which is stacked at an outermost side of the plurality of media, the light irradiation member irradiating the light bearing image information and moving a first distance in the first direction over the first medium, the voltage application member applying voltage to a second medium, which is stacked at an inner side relative to the first medium, the second medium being exposed by the first medium being conveyed, the light irradiation member irradiating the light for image erasure at the second medium and moving a second distance in the second direction over the second medium, and, simultaneously with the movement of the light irradiation member in the second direction, the medium conveyance member conveying the first medium.