The application provides a mechanical structure diagram and an innovative description of the method steps. The measurement and control circuit diagram is relatively complicated and I don't want to draw it. May I? You can apply for an invention patent, but nowadays circuits are highly integrated. If a machine needs to add a lot of peripheral circuits to add your patent, and it cannot be integrated with the original highly integrated circuits, I am afraid it will have to use yours. There are not many manufacturers with patents. Especially LCD TVs are also pursuing size. Now the screen body is integrated into a thin body, and there is nowhere to add additional circuits.