| 摘要 |
PROBLEM TO BE SOLVED: To secure required visibility, and to improve power generation efficiency by a solar battery, in an information display device visually confirmed by looking up by an observer such as a traffic sign.SOLUTION: The information display device on the present invention is an information display device used by being positioned above the observer, and comprises a plurality of unit display parts adjacently arranged in the vertical direction, and the unit display parts comprise a display part for displaying an image observed by the observer, a solar battery part positioned under the display part and a lens arranged on the observer side of the display part and the solar battery part, and at least one unit display part satisfies a conditional expression (1). |
