Screen Gain is the brightness of the image reflected back off of the screen’s surface is measured, gauging the reflectivity of that surface. How to Choose the Best Gain for Projector Screen Paint?
When choosing a projection paint, the gain is generally considered, and the gain is a numerical representation of the inherent reflection characteristics of the projection paint film (brightness at each angle). A certain amount of light is projected on a completely diffuse scattering surface (that is, a reflective surface with the same reflectivity in the 180-degree direction up, down, left, and right), and the reflection brightness at this time is set to 1. Then, under the same conditions, project the same light in the vertical direction of the screen, and measure the brightness of the center point and each point on the same arc. The ratio of this brightness to the brightness of complete diffuse scattering is called the gain of the screen. In fact, to put it bluntly, the brightness of the high-gain picture can be improved to a certain extent, and the low-gain is normal brightness.
In fact, for general household use, it is not necessary to choose special high-gain projection paint, because the color performance will be degraded when the gain is particularly high, and the high-gain viewing in a dark environment, the contrast with the environment is too large, which is also prone to viewing. It is not very healthy for the user to use such a high-gain screen for a long time if the user’s eyes are tired. So in general, you can actually choose a projection paint with a gain of about 1.0-1.2.
Projection paint generally has silver, gray, silver-gray, and white. The gain of silver is the best, and the gain of gray, silver-gray and white is generally around 1.0-1.2, which meets the needs of ordinary users. In general high-end home theaters, the exhibition hall will choose Langshi silver projection paint. The gain of silver projection paint is around 1.5-2.0, which can produce good results, but it also requires higher construction. Generally, the cost of home construction is higher, and gray, silver-gray, and white are more suitable.
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