1 is the manufacturing technology of wide-screen deformable lens, which is controlled by patent.
2, is the optical performance. Widescreen was invented in America in 1950s and 1960s. Its advantage is large viewing angle, which can reach 150 degrees. Why should it develop widescreen? It is because people's eyes are easier to move left and right instead of up and down. The scientific basis of widescreen is that it has reached the width that people's eyes can reach, so people are most comfortable to watch widescreen.