According to exemplary embodiments of the present invention, in a projection lens position adjuster, when a part of a dial exposed from an exterior case is rotated downward, a gear is rotated in an R2 direction. A Y-slider is then moved downward (in a Y3 direction). Accordingly, a Y-table is moved downward,...http://www.google.com/patents/US7090360?utm_source=gb-gplus-sharePatent US7090360 - Projector
