Before the invention of the film, which toys took advantage of the phenomenon of "image retention"?

Lantern, also known as riding lantern, is one of the traditional toys in China, and it is a kind of lantern, which is common in Lantern Festival, Lantern Festival, Mid-Autumn Festival and other festivals. A candle is lit in the lamp, and the heat generated by the candle causes airflow and makes the axle rotate. There is paper-cut on the axle, and the shadow of paper-cut is projected on the screen by candlelight, and the image keeps moving. Because there are many pictures of ancient military commanders riding horses on all sides of the lamp, it seems that several people are chasing it when the lamp rotates, so it is named lantern. The candle in the lantern needs to be cut into small pieces. When you put it in a lantern, you should put it straight and never put it sideways.

Magdalene's pelvis, which is about 1.5 inches in diameter, also uses a similar animation principle. Researchers believe that animal images appear on both sides of the CD and in different positions, so we realize that it obviously has special uses and is related to the order of animation structure. Then, archaeologists put forward some convincing evidence, such as 1868' s bone-like "magic disc" found in Dordogne, Spain, which drew a picture of a doe or antelope on one side and a scene of an animal lying on it on the other.

Mark Asama and Floran Livermore found that if there is a threaded hole in the center, it can be tightened, and then the disk can rotate around the horizontal axis. In this way, you can see the superposition effect of the two pictures, just like seeing a doe get up and run from a lying state. Therefore, archaeologists have come to the conclusion that the Paleolithic people presented an animation-like effect by segmenting moving images under the flash, which is the earliest "movie animation technology".