| 摘要 |
An LED road traffic signal light equipped with symbol patterning by chromaticity where a color-blind person can distinguish between red and yellow LED signal lights even at a predetermined distance without causing entire mixture discolouring. A red LED signal light (1) comprising a group of LED elements (3) emitting red light, wherein the group of LED elements (3) is mixed with an identification LED element (5) having a chromaticity different from that of the red LED element (3), or mixed with an identification LED element (5) having a different luminance, or mixed with an identification LED element (5) combining different chromaticity and luminance, thus constituting an LED road traffic signal light which can be distinguished by both physically unimpaired person and color-blind person. |
