200mm led traffic light | The effect of traffic light color on vision
200mm led traffic light | The effect of traffic light color on vision
The use of these three colors as traffic signals is related to the structure of human visual function and psychological response.
Our retinas contain rod-shaped and three types of cone-shaped photoreceptor cells. Rod cells are particularly sensitive to yellow light, while the three types of cone cells are most sensitive to red, green and blue light, respectively. Because of this visual structure, it is easiest for humans to distinguish red from green. Although yellow and blue are also easy to distinguish, because the eyeball has fewer photoreceptor cells sensitive to blue light, it is better to distinguish between red and green. Therefore, the color of the traffic light is also asked by the university!
Color also has the meaning of activity, to express heat or intensity, red is the strongest, followed by yellow. Green has colder and calmer connotations. Therefore, people often use red for danger, yellow for alertness, and green for safety.
Moreover, because red light has the strongest penetrating power, light of other colors is easily scattered, and it is not easy to see in foggy days, while red light is the least likely to be scattered, even if the visibility of the air is relatively low, it is easy to be seen. There will be no accidents. So we use red for prohibition.
The use of these three colors as traffic signals is related to the structure of human visual function and psychological response.
Our retinas contain rod-shaped and three types of cone-shaped photoreceptor cells. Rod cells are particularly sensitive to yellow light, while the three types of cone cells are most sensitive to red, green and blue light, respectively. Because of this visual structure, it is easiest for humans to distinguish red from green. Although yellow and blue are also easy to distinguish, because the eyeball has fewer photoreceptor cells sensitive to blue light, it is better to distinguish between red and green. Therefore, the color of the traffic light is also asked by the university!
Color also has the meaning of activity, to express heat or intensity, red is the strongest, followed by yellow. Green has colder and calmer connotations. Therefore, people often use red for danger, yellow for alertness, and green for safety.
Moreover, because red light has the strongest penetrating power, light of other colors is easily scattered, and it is not easy to see in foggy days, while red light is the least likely to be scattered, even if the visibility of the air is relatively low, it is easy to be seen. There will be no accidents. So we use red for prohibition.
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