| 摘要 |
<p>PURPOSE:To visually recognize and copy information at the time of necessity by forming an information shielding sheet of a liquid crystal plate capable of adhering to a part to be shielded of the surface of a sheet, inhibiting to transmit a light if the plate is not electrified, but transmit the light at the time of electrification. CONSTITUTION:An information shielding sheet 6 is formed of an adhesive and flexible liquid crystal plate at a part to be shielded of the surface of a sheet 5, a light is not transmitted therethrough in a state that the plate is not electrified to a liquid crystal, but transmitted therethrough at the time of conduction. With this structure, when the sheet 6 is adhered to be attached to a part of information to be shielded on the sheet 5, the plate does not become light permeable unless the liquid crystal of the plate is not electrified, and the information of the part cannot be visually recognized, and cannot be copied. However, at the tiem of necessity, only when the plate of the sheet 6 is electrified, the liquid crystal becomes light permeable. Accordingly, the information can be visually recognized, and copied.</p> |
