| 摘要 |
<p>PURPOSE: A signpost device for a guardrail using a solar cell is provided to enable a driver to easily recognize driving information even in the night. CONSTITUTION: A signpost device for a guardrail using a solar cell comprises a solar panel(20), indication units(30), and a power supply unit(22). The solar panel is integrally attached on a guardrail and is composed of multiple solar cells(21). The indication units are attached on the guardrail and indicates the traveling direction of a vehicle(1). The power supply unit receives first power from the solar panel and supplies the first power to the indication units. And the power supply unit receives second power from the outside and supplies the second power to the indication units.</p> |
