Pang of Changshu Middle School in Jiangsu Province invented a traffic light that can be recognized by color blindness, adding some white and regular shapes to the current pure red and green traffic lights. For example, adding a horizontal white bar in the middle of the red circle and a vertical white bar in the middle of the green circle can identify color blindness.
"Our current traffic lights are all red and green, and color-blind people can't tell the difference between these two colors, which brings great inconvenience to life." To prove how inconvenient this is, Pang cited a data: color blindness accounts for 5.6% of the world population. "On one occasion, I saw the traffic police catch a man who ran a red light, and it turned out that he was color blind and couldn't tell the difference between traffic lights, so I had the idea of doing this traffic light."
Compound mode
1, additional combination mode. Focusing on the subject and object, add accessories or functional accessories that are not strongly related to the function of the subject and object itself. These accessories or functional accessories play an auxiliary role for the main object. For example, the function of toothbrush is to brush teeth and add music to toothbrush, and music plays a supplementary and auxiliary role.
2. Radiation combination mode. It is mainly to fully analyze the subject and object first, and then add corresponding appendages or functional attachments around a certain part or function of the subject and object as the center. These appendages or functional attachments are mainly used to improve or make full use of the functions of the subject and object. Similarly, taking the toothbrush as an example, in order to give full play to the function of the toothbrush handle, the front brush can be replaced, so that the old brush can be replaced with a new brush to form a new combined product.
Refer to the above contents: Baidu Encyclopedia-Combinatorial Thinking, Baidu Encyclopedia-Combinatorial Principle.