Variable curvature mirror die lecture support device

摘要

PURPOSE: To enlarge a display screen with a concave half mirror without making a device large so as to be easy to see, to vary the curvature of the half mirror and to improve the safety of the lecture supporting device. ;CONSTITUTION: As to this lecture supporting device; the concave half mirror 3 is arranged in front, a picture displayed on a display device arranged below the half mirror 3 is projected on the half mirror 3; the half mirror 3 has a structure in which a flexible plastic 31 is stuck to a transparent piezoelectric film 32. A high voltage electrode surface constituted of a transparent conductive film 33a for impressing voltage on the film 32 of the half mirror 3 is on a joint part with the plastic 31.;COPYRIGHT: (C)1995,JPO