Edge-melting seamless-splicing display system, Fresnel lens and method for simulating long-focus projector by short-focus projector

Abstract

The invention relates to the field of a back projection spliced display wall, and discloses an edge-melting seamless-splicing display system. The edge-melting seamless-splicing display system comprises a curtain for projecting an image, at least two projectors which are arranged side by side on the back side of the curtain for projecting the image on the curtain, and a Fresnel lens which is arranged between the projectors and the curtain; the projector image is projected to the curtain through the Fresnel lens; melting overlap is generated on the edge of a picture and the picture of the adjacent projector; the distance between the projectors and the curtain is a formula which is as shown in the specification; and the distance between the Fresnel lens and the curtain is a formula which is as shown in the specification. Edge melting and splicing can be realized by adopting a short-focus lens projector to reduce projection distance and system thickness; and the curtain with relatively small semi-gain visual angle, high gain and high contrast ratio can be selected to expand the selectivity of the curtain, so that the overall display effect of the system can be improved.

Description

technical field [0001] The invention relates to the field of rear projection splicing display walls, more specifically, an edge fusion seamless splicing display system, a Fresnel lens and a method for simulating a long-focus projector through a short-focus projector. Background technique [0002] The rear projection splicing display wall is a multi-screen image splicing together to realize the image display application of ultra-large screen and ultra-high resolution. At present, the rear projection splicing display technology can be divided into two processes: seam splicing and seamless splicing. Among them, the edge fusion technology is the most widely used in the seamless splicing process, which completely eliminates optical splicing and physical splicing, and makes the system picture complete without division. , which is especially important in some map and line display applications. [0003] The edge blending technology is to combine and project multiple projectors on a...

AI Technical Summary

Problems solved by technology

[0005] 1. When using a telephoto lens, the projection distance needs to be increased, resulting in an increase in the overall thickness of the display system, which cannot be installed and used in some places with small spaces;

[0006] 2. The larger the viewing angle of the screen, the lower the gain, resulting in lower brightness in front of the screen of the system, and it is necessary to properly reduce the contrast of the screen to increase the gain to meet the brightness requirements, and the overall display effect is not good.

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