Understanding of home theater projection screen and optional elements – home the
< BR> In recent years, more and more popular as the projector build home theater, projectors can not be absent, has become a consensus. However, most people are aware of the projector more than, while the projection screen is not quite clear to understand, we all know that home and business projectors are divided. So many users will have this question, projection screen is also divided it home and business, the answer is yes.
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<BR> From the optical point of view, no matter what the projector, projecting out of the images are reflected through the projection screen to light before the eyes of the formation. A projection screen is as smooth, from a physical point of view, is passive, therefore, different screen materials and viewing angle, the reflection of light intensity, spectrum and transmission are different, so the image will reach our eyes differ. In particular, the requirements for home theater, the image not only to see clearly, but also in the brightness, contrast, color, detail, noise, etc. have higher requirements.
<BR> Here we use the projection screen for home and related points of knowledge we make a brief introduction.
<BR> Gain and angle of view
<BR> Gain screen surface is considered an important indicator of the number of reflected light, usually white uniform rough surface is defined as a gain. Reflective screen surface brightness of the screen with it than to gain, when the vertical viewing screen, the greater the gain, the image the more light. Of course, the projector and the projection screen still requires a certain match, not Renyiyitai projector easily coupled with a projection screen will have a good image results. If a high brightness projector coupled with a high-gain projection screen, cast out of the image may be a vast expanse of whiteness, and a low brightness projector If matched with a lower gain screen, that image will into the darkness of the. Therefore, a gain for the projector select the appropriate screen is very important. In addition, to understand how many different screen gain screen material needed to understand the material.
<BR> Different materials have different screen brightness material gain. General home theater screen can be divided into white plastic curtains, glass bead and pearl of three. Diffuse white plastic screen is the screen, the brightness gain is characterized by small (typically gain around 1.0), wide angle, the light spread evenly, while for more people watch, but it needs somewhat better with the brightness of the projector. Bead curtain of the reflected light along the incident beam is reflected back to the same direction, so a higher gain (gain of 2.0 and above) features can be seen near the front in the screen brightness, contrast, levels of feeling very good image . Shortcomings is smaller bead curtain view, when people see the outside for most of the spectators sitting in the viewing experience will be affected to some extent. Pearl is a light curtain opposite direction along the divergence of the incident light reflective screen, its brightness gain and angle between the size of the above, is the screen brightness and balanced perspective, and the projector best suited for hanging on the ceiling.
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