Ultra-short focus anti-light projection curtain

Abstract

The invention relates to an ultra-short focus anti-light projection curtain and a projection system of applying the projection curtain. The projection curtain comprises a bottom and a prism layer pasted from the back forwards, the bottom layer comprises a black rubber layer, the back surface of the prism layer is a plane fitted on the front surface of the bottom layer, the front surface of the prism layer is formed by in sequence connected multiple lines of prisms in parallel arrangement along the vertical direction, each line of prisms are formed by multiple triangular convex lens in sequence connected along the level direction, each triangular convex lens comprises two inclined planes respectively facing forward upside and forward downside and a bottom surface facing the rear end, wherein the inclined plane facing the front downside is a convex plane protruding forward in the horizontal direction, and the convex plane is provided with a projection reflection layer. The projection curtain and the projection system can better avoid the interference of external ambient light while achieving the ultra-short focus projection, and can obtain a larger angle of view range while maintaining a high projection gain, and have a better visual effect compared with the traditional projection screen.

Description

technical field [0001] The invention relates to the field of projection, in particular to an ultra-short focus anti-light projection screen and a projection system using the projection screen. Background technique [0002] The projection screen is a tool that cooperates with a projector to display images, video screens and other images, and is usually used in commercial advertisements, teaching, office, home or theater entertainment and other occasions. As an LCD screen that is also used to display images, the cost of the LCD screen is high and it is not easy to carry and store in the case of large-scale demand, and it cannot be stored immediately when not in use; and the LCD screen larger than 50 inches is expensive , which is not conducive to the purchase and use of ordinary families; in addition, when watching LCD screens for a long time, human eyes are also easily affected by radiation, which is not conducive to human health. [0003] However, compared with LCD screens,...

AI Technical Summary

Problems solved by technology

[0009] 1. At present, most projection screens are susceptible to interference from external ambient light such as sunlight and lights, and are only suitable for relatively dark occasions. For example, when teaching and demonstrating images, indoor sunlight and lights need to be blocked to create an environment that avoids light interference. Occasions, this greatly limits the use of projection screens, and because it is easily interfered by external ambient light, its color saturation and black-and-white contrast are low;

[0010] 2. At present, the projection screens on the market generally have a contradiction between high gain and wide viewing angle, and cannot meet the requirements of high gain and wide viewing angle at the same time;

[0011] 3. Most of the current projection screens are made of PPU material. When PPU material is used as a projection screen, the rollability is not good.

[0012] 4. The surface of the current projection screen has weak scratch resistance and is not easy to clean and scrub. During the cleaning process, the projection screen is prone to scratches and damage;

[0013] 5. The black and white contrast of the traditional projection screen is low. Compared with the LCD screen, the projected image effect is not good, which affects the visual effect of the viewer

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