Curtains are basically divided into four types: the first is soft curtain, the second is glass fiber curtain, the third is woven white plastic curtain, and the fourth is glass bead curtain. I think white plastic curtains are better.

The gain of white plastic curtain is mostly in the range of 0.9- 1.3, and the reflected light is soft, so it is not easy to get tired after watching for a long time, and the viewing angle is also large, which is no problem from the side.

The gain of gray plastic screen is below 1.0, but the contrast of the screen can be effectively improved because of the gray plastic material, but now the contrast of advanced projectors is above "10000+ 1".

Extended data:

The choice of curtain materials (materials are classified by DA-LITE products) must be different according to the projection method, projector type and the planning of different venues. The following information will be provided for reference:

Frontal projection use

Matt white white cushion white material:

As a glass fiber substrate, it is the most widely used curtain under the control of ambient light, which not only provides a broad ideal perspective, but also shows the consistency of the picture and accurate tone presentation. It can be cleaned with clean water or mild soap, which is mildewproof and nonflammable.

Gain value: 1.0 gain perfect angle: 120 degrees.

New ◎ New ◎ High contrast white (gray curtain) material:

As a glass fiber substrate, in addition to the characteristics of padding white, optical coating is added to the surface to enhance the black level of the image, but it will not affect the performance of the white level and enhance the contrast and layering of the picture. It is suitable for DLP or LCD projectors with moderate output brightness, and can be cleaned with clean water or mild soapy water, which is mildewproof and nonflammable.

Gain value: 1. 1 gain perfect angle: 100 degrees.

Selection and use of rear projection screen (materials are classified by DA-LITE products):

Grey Da-Tex semi-transparent soft curtain;

It is an ethylene substrate with high light transmittance and low reflectivity, providing color consistency and image contrast. It can be cleaned with clean water or mild soapy water, which has mildew resistance and incombustibility.

Gain value: 1.8Gain perfect angle: 60 degrees.

High contrast semi-permeable high contrast gray surface soft curtain

It is an ethylene substrate with high light transmittance and low reflectivity. Because of its special optical coating, it provides higher image contrast than Da-Tex. Suitable for use with projectors with high brightness output. It can be cleaned with clean water or mild soapy water, which is mildew-proof and nonflammable.

References:

Projection curtain Baidu encyclopedia