In the 21st century, with the popularization of digital technology in the audio and video fields, people sitting at home can feel the shocking audiovisual response like a theater, and the concept of home theater has become hot. However, home theaters are basically limited to mansions and villas that have the conditions to create independent audio-visual rooms. It was not until the emergence of a new generation of high-tech audio and video equipment that the development concept of home theater changed: toward the direction of living room theater. The function of the living room theater is more diversified, and it can complete a variety of entertainment functions such as watching movies, listening to music and playing games, so it is very popular with users. A major breakthrough of the living room theater to the traditional home theater is to bring the home theater from the traditional closed-light viewing environment to the living room, so that it can watch the high-definition picture quality normally without turning off the lights and windows. The living room space is more open, not only With good ventilation, it is more convenient for people to watch movies at any time. The ultra-short-throw black grid anti-light curtain is a front projection optical projection screen for ultra-short-throw projection applications. It contains a multilayer optical structure and a black film. Using reflective imaging technology, it can effectively absorb ambient light and greatly improve the brightness. The contrast and color saturation of the displayed picture in the environment, combined with ultra-short-focus laser projection, create an excellent solution for giant screen living room theater, home theater, conference presentation, and e-learning. The living room theater adapts to local conditions, does not stick to space and form, and can make better use of the advantages of the living room itself. The living room of a modern house is generally the largest space in the whole house, and only in such a space can you experience the enjoyment of perspective. The telephoto anti-light curtain adopts multiple optical coating technology, the black ambient light absorption coating is used to absorb stray ambient light, and the reflective optical coating is used to reflect the light source in the direction of the projector to achieve the purpose of resisting ambient light . It allows the projection to be viewed not only in a completely dark environment, but also in a brighter environment with the projector to view high-quality images, which greatly expands the use of projection. The living room cinema brings the cinema closer to life. It is suitable for daily leisure, entertaining guests, and family gatherings. As long as you open the door and enter the living room, you can immediately enjoy entertainment. This is something that an independent audio-visual room cannot achieve. It can be said that the living room cinema really brings the living room back home, and really makes the home cinema feel at home. The Fresnel anti-light curtain is a front projection optical projection screen for ultra-short throw projection applications. It contains a multilayer optical structure and nano-particle powder. Using Fresnel lens imaging technology, it can effectively absorb ambient light and greatly improve The contrast and color saturation of the display picture in a bright environment, the appearance of a slim flat panel design, and an ultra-short throw laser projection, create a huge screen living room theater, home theater, conference presentation, and an excellent solution for e-learning.