抄録
Providing the drivers with relevant traffic information on a real-time basis, LED (light emitting diode) traffic information boards have a vital role. On the other hand, we must know the optimum range of chromaticity for display colors so that the drivers can correctly recognize the displayed information in a short time. In this experiment, we tried to define the optimum chromaticity regions for display colors so that a given color is most effectively discriminated from the others. Categorization of the display colors on the chromaticity diagram is extremely useful in designing a LED traffic information board.
