Patent ID: 6917359

Claim:
An information display device comprising: a display which is driven by a voltage applied thereto and which has a memory effect which is capable of keeping displaying information thereon after stoppage of supplying of electric power; a slot which enables a storage medium to be inserted in and ejected from the information display device, the storage medium being stored with image data to be displayed on the display; a storage medium driving circuit for reading the image data from the storage medium set in the slot; an internal memory for storing the image data read from the storage medium; a display driving circuit for driving the display by applying a voltage in accordance with the image data stored in the internal memory; a power source section for supplying electric power to the display driving circuit and the storage medium driving circuit; and a control section which inhibits the display driving circuit and the storage medium driving circuit, respectively, from performing a display updating operation and from performing an image data reading operation simultaneously, the display updating operation being performed by application of a driving pulse voltage to the display including a reset pulse voltage for resetting a previously displayed image and by application of a driving pulse voltage to the display in accordance with an image data to be displayed.