| 摘要 |
<p>PURPOSE:To eliminate the parallax and to prevent the occurrence of write error by arranging two-dimensional lens arrays as an optical system of 1:1 between a liquid crystal display device and a transparent protective plate. CONSTITUTION:A protective glass is divided into a protective glass 4 and an intermediate glass 6 and a micro lens array 5 is interposed between them, and a micro lens array 5' is provided on the upper face of a liquid crystal display device 2. Micro lens arrays 5 and 5' are so arranged that optical axes of respective lens elements coincide with each other. When the focal length of micro lenses 5 and 5' in the glass, the thickness of the protective glass 4, the thickness of the intermediate glass 6, the thickness of the upper glass of a liquid crystal plate, and the focal length of micro lenses 5 and 5' are denoted as (f), d1, d2, d1, and d3=d2-2f respectively, the optical system of 1:1 is constituted at the time of d1:d2=f:d3, and a projected image can be seen in all directions at this time. Consequently, the parallax does not occur.</p> |
