Are curtains necessary? Measured comparison effect between projection screen and white wall

The curtain is definitely necessary.

Compared with ordinary fabrics, projection screens have significant advantages. First of all, the projection screen has a strong ability to reflect incident light, which can improve the brightness of the picture. Through clever processing of light, it can also change the black level effect of the picture and enhance the contrast of the picture.

The material of the projection screen is different from ordinary cloth (glass bead screen effect)

The reason why the projection screen has such an effect is because special materials are used in the production of the projection screen. Projection screens are made of various materials. Common ones include glass bead screens (not washable), metal screens, and embossed plastic screens. Embossed plastics are divided into white plastic, gray plastic, silver plastic, etc. The common ones on the market are glass bead curtains and white plastic curtains. Generally speaking, the price of glass bead curtains ranges from high to low, while the price of white plastic screens is generally higher.

Compared with the projection screen, the white wall does not have the above-mentioned functions of increasing gain, expanding the viewing angle, improving resolution, enhancing contrast, enhancing color restoration, etc., and because the wall is easily contaminated, or the texture of the wall itself All will have a certain impact on the projected image.

Comparison of actual measured effects between projection screen and white wall:

1. Portrait effect on curtain:

2. Portrait effect on white wall:

Comparison of the effect of dark details:

Rendering of the dark part of the curtain:

Rendering of the dark part of the white wall

Comparison of the effect of details:

The effect of the dark part of the curtain Picture:

2. White wall detailed rendering:

It is impossible to replace the projection screen with a white wall. The projection screen uses a special production process to improve the brightness of the projection screen. , contrast and color reproduction are helpful, there is no doubt that, especially in the construction of high-end home theaters, a good curtain is as important as a good amplifier.

Extended information:

Screen viewing distance:

Screen size is generally expressed in inches, such as 80 inches, 120 inches, etc. Since the focal distance of the projector determines the distance between it and the screen, based on the distance between them and the height and width of the room where the screen is installed, you can calculate what size screen should be installed.

The viewing distance is generally between three and five times the effective screen height. There is also a certain adaptation period for the viewing distance: when you first use it, a distance of five times the screen height feels more comfortable, and later you will feel that a distance of three times the screen height is more shocking.

Reference: Baidu Encyclopedia-Projection Curtain