Yasuhiko Horio

Multi-color projection display

Abstract A large size, ultra-high resolution display has been demanded for the computer systems such as CAD and workstation. In order to realize the demand beyond the ability of CRT, the laser-addressing liquid crystal projection displays have already been in practical use. However, those type of projection displays have a disadvantage that it takes a few minutes to redraw the entire screen.

Surface wave filter element

A surface wave filter element includes a portion on which elastic surface waves propagate. This portion includes a piezoelectric material, an amorphous boron layer or plate and IDT electrodes for inputting and outputting signals. The piezoelectric material is a film made of ZnO, LiNbO3 or LiTaO3 formed by sputtering, ion beam deposition or chemical vapor deposition. The amorphous boron layer or boron plate may be formed on a substrate made of an inorganic material. The boron material is formed using electron beam deposition, ion beam deposition or chemical vapor deposition.