| 摘要 |
<p>PURPOSE:To ensure an easy input of coordinates with high accuracy by designating a position on a magnified image projected on a screen by a digitize and performing the input of coordinates at a desired position. CONSTITUTION:A coordinate input device 1 contains an optical image converting means 2 which converts the picture data obtained via a display control means 11 into an optical image, an optical system 3 which magnifies said optical image, a screen 4 and a digitizer 5. The means 11 includes a picture memory 1a, a D/A converter 11b and a timing controller 11c. While the means 2 has a liquid crystal television 7 and a light source 6 for illumination of back light of the TV7. Thus the picture data read out of a picture memory 9 is transferred to the means 11 via a picture processor 10 and projected with magnification on a screen 4 via a converter 11b, etc. Furthermore, the coordinates is inputted on the back of the screen 4 and the output of the screen 4 is transferred to the processor 10 for the purpose of picture processing.</p> |
