In 2009, "Avatar" brought 3D technology to our lives. 3D movies deeply shocked us with their realistic images and immersive feelings. Afterwards, the 3D movie boom in China has never stopped. Although the price of a 3D movie is twice as expensive as ordinary 2D movies, everyone still rushes. So how much do you know about 3D? What is the status of 3D movies in the global market? From a purely technical point of view, the rise of 3D technology has revolutionized the display industry. It makes the picture from the original plane into a three-dimensional, bringing a strong visual impact and immersive visual sensory experience, straightforward is to make the picture more three-dimensional, so that the picture played out more vivid and immersive a feeling of. The principle of 3D imaging is that people have a certain gap between the eyes, and the two eyes actually see something different. When people look at an object, because of the difference in vision between the left and right eyes, it will be There is a feeling of "live" picture. 3D technology can be divided into naked-eye type and glasses type. Most of the current cinemas use glasses-based 3D technology, so we are talking about glasses 3D here today. The glasses type 3D technology can be divided into the following: color difference type 3D has the longest history, the imaging principle is simple, and the implementation cost is low, but the 3D picture effect is also the worst, and it is necessary to cooperate with the color difference 3D glasses to see the 3D effect. The color difference type 3D first separates the spectral information from the rotating filter wheel, and uses different color filters to filter the screen, so that one picture can produce two images, and each human eye sees different images. At present, our most common filter colors are usually red/blue, red/green, or red/green. There are fewer and fewer theaters using this technology. Polarization type 3D is also called polarization type 3D technology, which belongs to passive 3D technology. The price of glasses is also relatively cheap. At present, 3D movie theaters, 3D liquid crystal televisions, etc. mostly use polarized 3D technology. Like the shutter-type 3D technology, polarized 3D is also subdivided into many types. For example, polarized 3D used in the projector industry requires two or more projectors with the same performance parameters to achieve 3D effects, and is used in the television industry. Polarized 3D technology requires the screen to have a refresh rate of 240 Hz or above, and there are also many differences in the way it is implemented. In 2009, "Avatar," with a beautiful picture, immersive feeling, a sense of grandeur, triggered the upsurge of watching 3D movies. Since then, the global 3D movie has entered a period of rapid development, and the number of 3D movies has grown tremendously. According to relevant data, in the "Avatar" released in 2009, only 11 global 3D movies (4 of which were 2D to 3D), and in 2010 3D movies reached a staggering 31 (of which 9 were 2D to 3D ), turned almost three times. As the fiery technology of the movie market nowadays, more and more manufacturers choose to shoot 3D movies, but it is not that they really want to present a shocking visual experience for everyone, but simply for box office profits. Now that not only 3D has appeared in new films, but more manufacturers have even nostalgic slogans. Using 2D to 3D to re-engrave some classic movies, it can bring great profits with very little cost. There are still some movies in the current market that obviously have no 3D lens but use 3D to play, and there is no 2D version yet. With the lure of such lucrative profits, it is understandable that 3D movies are favored by film production companies. 3D movies are favored by theaters because the fare of 3D movies is much higher than that of 2D movies. With the same number of viewers, the box office revenue will be much higher. In addition, 3D movies need to wear specialized 3D silver mirrors. Although theaters sometimes provide free glasses, the health conditions are worrying. Therefore, some moviegoers will choose to purchase glasses separately, which is also a very substantial income. There are many current 3D movies, and there is no shortage of "Mr. Dong Guo". There are not many high-quality films such as "Avatar." After seeing some bad movies that can't reflect the sense of 3D scene and do not make 3D, Western consumers gradually lose interest in 3D movies. Careful friends will find endless news about the decline in box office in North America. What's interesting is that when the foreign blockbusters enter the country after the foreign premiere, they will be able to “get back to life†at the box office, which makes people wonder.