What is a real home theater? Just move the movie theater home. The most basic home theater is a set of audio systems that can play back multi-channel sound, a video display system with no less than 2 meters wide screen and projector, plus signals from DVD players, TV set-top boxes, game consoles or computers. The complete combination of source and intermediate connections. If you add room decoration, the lighting is more perfect.
Some people may ask: I use plasma 50", more than 60,000 yuan, should be a home theater? No, the reason is not big enough. Imagine the ratio of the screen of the cinema to your seat.
Look and listen: In fact, people's ability to see (images) is very high. For example, the beauty pageant is very eye-catching for most people, and Ferrari sports cars are loved. . . In fact, people \ environment \ construction \ car \ clothing \ food and other things in the external aspects of people's aesthetic views are basically the same. But the difference is different. Some people regard rock music as noise, some people listen to classical music, and some people like the beautiful sound orientation. Some people like the sound of the atmosphere. . . . It can be seen that the sensory stimulation given to people is more direct and more important.
Now let's talk about how to choose a home theater screen.
The correct choice of home theater screen is mainly considered from the following aspects:
1. The distance between the seat and the screen is the key to select the screen size. 2. The original ratio of the display components of the projector determines the aspect ratio of the screen. 3. The installation method of the projection screen and the decoration of the room. 4. The type of the projector. 5. Projection. The brightness, contrast and other indicators of the machine 6, the impact of ambient light 7, several popular home theater projectors on the market now choose screen recommendations
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 image width; 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 the ordinary home environment in China, it is appropriate to choose a 100-inch screen to watch at a distance of 4-5 meters.
2. Determine the proportion of the screen according to the original proportion of the display components of the projector: the type of projector technology used in home theater is divided into CRT, DLP, LCD, D/ILA, LCOS and so on. CRT (three-tube machine, such as BARCO's CINE 7,8,9; SONY's D50Q, G70, G90, etc.) all use 4:3 CRT tube, it should use 4:3 screen. Single shot DLP, LCD, D/ILA, LCOS (such as SIM2 HT series, BARCO CINEVERSUM series, SHARP12000, Z201, MARANZTE12S3/S4, SONY VW12 HS1, QULIA004, SANYO Z3, PANASONIC AE700, INFOCUS SCREENPLAYER series, etc.) are adopted 16:9 display 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 choosing.
3, according to the room decoration selection screen installation: the screen is divided into fixed frame type, electric rewind type, manual rewind type, ground pull-up type, etc., divided into front projection and rear projection in projection mode. The rear projection method is not affected by the ambient light of the audition. Even if the curtain is not closed during the day, the effect is good. The disadvantage is that it requires a separate space for the rear projection darkroom. The advantage of the front projection is that the construction environment is not high, but the darker the viewing environment is required. The better. But most home theaters use the positive investment method, we have to choose different screen forms according to the use of the room. If you have a dedicated home theater room, you should choose a fixed-frame screen, not only the image effect is good, but also the cinema feel, 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 collected when not in use, without damaging the aesthetic coordination of the living room environment. If the wall and ceiling do not have a screen to install, 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, the type of projector technology for home theater is divided into three categories (CRT), single tube machine (DLP, LCD, D / ILA, LCOS, etc.) two major categories. 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 develops it in a targeted manner. A gray screen was created, mainly due to improved contrast and color reproduction of the single tube machine, such as FIREBOWK, GREYHAWK RS and other materials. But the single tube machine can also choose a white screen, but the three tube machine can never choose a gray screen.
5. Most mainstream home theater projectors on the market today are DLP or LCD projectors with brightness output between 800 ANSI and 3500 ANSI and 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. 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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