| 摘要 |
<p>PURPOSE:To eliminate the trouble of setting by equalizing the focal length of a projector to the shortest distance from a surface where a column for supporting the projector is installed to the projector, and setting the projection direction perpendicular to the installation surface direction. CONSTITUTION:An image projected by the projector 1 is formed on the surface 4 where the base part 3 of the column 2 or the column 2 is installed. For the purpose, the height from the projection surface of the projector 1 fixed on the column 2 is equalized to the focal length of the projector 1, which is fixed in the image formation surface direction to eliminate the need to adjust the focus and fix the projector and screen surface only by installing the column 2 in a desired place. When the device is combined with a street lamp, the projected image provides the function of a display body and also lighting effect as the street lamp and even when the projection surface is stepped on, there is no problem, so the road surface can be used effectively as a display space as well as a walking space.</p> |
