| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electronic device allowing a user himself or herself to know a detected touch position. <P>SOLUTION: The electronic device comprises: first light sources 201-203 radiating light of visible wavelength for projection; a light valve 204 modulating radiated light from the first light sources 201-203; a projection optical system 205 projecting an image produced by modulation light from the light valve 204; a second light source 12, differing from the first light sources 201-203, radiating light of visible wavelength approximately in parallel with a projection surface of the projection optical system 205; imaging means 11 acquiring a first image which corresponds to visible wavelength from the second light source 12 and includes a projection area by the projection optical system 205; detecting means 15 detecting changes among images based on the first images which are acquired by the imaging means 11 at predetermined intervals; and instructing means 15 instructing a predetermined process based on the detected position in the first image. <P>COPYRIGHT: (C)2012,JPO&INPIT |
