| 摘要 |
<p>PROBLEM TO BE SOLVED: To stably maintain a function and to obtain excellent long-term reliability by providing a transparent cover in front of a light emitting means. SOLUTION: A translucent cover 45 is provided in front of a light emitting means to solve the problem on dust, a stain, etc., and an optical system, a light emitting element, etc., are protected. Since dust or the like is attached to the cover 45 without being attached directly to the optical system such as a lens and the light emitting element, etc., in this way, deficiency such as not to be able to obtain light quantity enough to make a coordinate inputting/ detecting device function stably by that light from the light emitting means is blocked off by dust, stain or the like is eliminated by cleaning the cover 45. Also, the cover 45 not only protects the optical system, etc., from dust, etc., but also is effective to an unexpected accident such as to collide with an object physically. As for the cover 45, for instance, glass material such as soda glass and Pyrex(R) glass and transparent plastic or the like represented by acrylic resins, etc., can be used.</p> |
