1. First determine the size of the screen based on the distance between the viewing seat and the screen.
In general, for a 4:3 signal, the optimal viewing distance is 2.5-3 times the height of the image; for a 16:9 image, the optimal viewing distance is 2-2.5 times the width of the image. For a fixed viewing distance, if the screen is too small, it will lose the shock of the big screen; if the screen is too large, people will feel dizzy and unable to watch for a long time. Conversely, if the screen size is fixed, we can also figure out the best viewing distance. For a normal home environment in China, it is appropriate to choose a 100-inch screen for viewing at a distance of 4-5 meters.
2. Determine the proportion of the screen according to the original scale of the projector display components
The projectors for home theaters can be classified into CRT, DLP, LCD, D/ILA, and LCOS in terms of technology types. CRT (three-tube machine, such as BARCO's CINE7, 8, 9; SONY's D50Q, G70, G90, etc.) all use 4:3 CRT tube, here, you should use 4:3 screen. Single shot DLP, LCD, D/ILA, LCOS (such as BARCO CINEVERSUM series, SHARP12000, Z201, MARANZTE12S3/S4, SONY VW12 HS1, QULIA004, SANYO Z3, PANASONIC AE700, INFOCUS SCREENPLAYER series, etc.) are all displayed in 16:9 Panel, so you should use a 16:9 screen. There are also individual single-gun home projectors that use a 4:3 display panel, which users need to pay attention to when selecting.
3. According to the room decoration selection screen installation method
Screen installation methods are divided into fixed frame type, electric rewind type, manual rewind type, and ground pull-up type. The projection method is divided into front projection and rear projection. The rear projection method is not affected by ambient light. Even if the curtain is not closed during the day, the viewing effect is good. The disadvantage is that an independent space is required for the rear projection darkroom; the advantage of the front projection is that the construction environment is not demanding, but the requirement to watch the environment is more The better the black. But most home theaters use a positive projection method, and we have to choose different screen formats depending on the purpose of the room. If you have a dedicated home theater room, you should choose a fixed-frame screen. The fixed-frame screen not only has good image effects, but also has a cinema feel and the lowest price. If it is installed in the living room or bedroom, you should consider the electric or manual rewind screen, which can be put away when not in use, so as not to damage the aesthetic coordination of the living room environment. If the wall and ceiling are not where the screen is installed, consider using a ground pull-up screen. In short, the home theater is not the whole of life, not because it destroys the living environment.
4. Select the screen according to the projector type
The projectors for home theaters are divided into three categories: three-tube machine (CRT) and single-tube machine (DLP, LCD, D/ILA, LCOS, etc.). The color reproduction of the three-tube machine is good, the contrast is almost infinitely high (15000:1), so it is necessary to choose white screen, such as ST130, UM150 and other materials; the single tube machine is relatively poor in contrast and color reproduction, and the screen manufacturer has developed it in a targeted manner. And the production of gray screen, mainly due to improved single-tube machine contrast and color reproduction, such as FIREBOWK, GREYHAWK RS and other materials. Of course, the single-tube machine can also choose a white screen, but the three-tube machine can never choose a gray screen.
5. Select screen material according to the brightness, contrast and other indicators of the projector
Most mainstream home theater projectors on the market today are DLP or LCD projectors with brightness output between 800 ANSI lumens and 3500 ANSI lumens, with contrast ratios between 500:1 and 5500:1. The choice of screen material is mainly determined by the brightness output of the projector, the contrast, and the size of the screen. The brightness of the image we see on the screen is related to the brightness of the projector, the gain of the screen, and the size of the screen. First, for a screen of the same size material, the brightness output of the projector is proportional to the brightness of the image; for the same projector and projection size, the gain of the screen material is proportional to the brightness of the image; for the same projector and screen material, the image The size is inversely proportional to the brightness of the image. The brightness of the image is not as high as possible. If the brightness is too high, the contrast will decrease and the human eye will feel uncomfortable. Therefore, no screen material can satisfy all the requirements of use, and the appropriate screen material should be selected according to the index of the projector and the size of the image. In addition, it should be noted that the screen itself also has resolution. Some brands of screen materials have warp and weft lines, which will cause interference fringes in the image, reduce the resolution and make the image slightly.
6. Determine the screen material used according to the ambient light level
The effect of ambient light on the image is also very large. First of all, the ambient light will reduce the contrast, making the dark part lack of layers, black is not black. Even if the room is completely black, the wall, the ground, etc. around the screen will reflect some light, resulting in a decrease in image contrast. GRAYHAWK and FIREHAWK materials can control unwanted reflected light and produce excellent images in a brighter environment.
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