An off-axis short focus front projection optical screen and projection display system

A front projection, short-focus technology, applied in the field of projection display, can solve the problems of projected image contrast drop, unreachable, high display contrast, etc., and achieve the effect of wide horizontal viewing angle, high contrast, and high definition

Active Publication Date: 2022-03-04
CHENGDU FSCREEN SCI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the approximately horizontal ambient light R1 that hits the upper area of ​​the screen and the light R2 that comes from the upper side of the screen with a larger incident angle are reflected by the screen and then exit, and finally enter the eyes of the observer 30, resulting in projection The image contrast is reduced, so a higher display contrast cannot be achieved

Method used

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  • An off-axis short focus front projection optical screen and projection display system
  • An off-axis short focus front projection optical screen and projection display system
  • An off-axis short focus front projection optical screen and projection display system

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Embodiment Construction

[0031] The technical solutions of the present invention are further described below with reference to the accompanying drawings.

[0032] like figure 2 As shown, an off-axis short-focus orthographic projection optical screen includes a first reflective layer 1, a functional layer 2, a Fresnel lens layer 3, a second reflective layer 4, a protective layer 5 and a base plate support layer 6 in sequence;

[0033] The first reflective layer 1 is a specular anti-reflection and anti-reflection layer; the functional layer 2 includes a lenticular lens layer 21, a coloring layer 22 and a diffusion layer 23 ( figure 2 Only one implementation is shown, the lenticular layer, the coloring layer, and the diffusing layer in that order).

[0034] Further, the mirror surface anti-reflection anti-reflection layer and the functional layer are respectively electroplated or printed or sprayed on the front and back sides of the first base material, and the refractive index of the mirror surface a...

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Abstract

The invention discloses an off-axis short-focus front projection optical screen and a projection display system. The optical screen sequentially comprises a first reflection layer (1), a functional layer (2), a Fresnel lens layer (3), and a second reflection layer (4), protective layer (5) and bottom plate supporting layer (6); Described first reflection layer (1) is mirror surface anti-reflection anti-reflection layer; Described functional layer (2) comprises the lenticular lens layer that order can change arbitrarily (21), a colored layer (22) and a diffusion layer (23). The display system includes the above-mentioned optical screen, and an off-axis short-focus projector (9) located on the side of the optical screen. The present invention has high-gain, wide-horizontal viewing angle, and high-definition image display, breaks through the defect of no depth-of-field image in traditional projection display, and obtains a high-depth-of-field image display effect completely comparable to that of liquid crystal display.

Description

technical field [0001] The invention belongs to the technical field of projection display, and particularly relates to an off-axis short-focus orthographic projection optical screen and a projection display system. Background technique [0002] In recent years, with the increase in the brightness of the projector itself, most projection screens need to be used in natural light or very bright environments. Due to the technical principle, when using ordinary glass bead screens, white plastic screens, gray screens, etc. to project images, the stronger the ambient light is, the brighter the black pattern on the projected image will be, and the contrast of the projected image will be seriously reduced. The ambient light is superimposed and faded, resulting in unsatisfactory color reproduction, and the image display is also very unclear, lacking the visual experience of three-dimensional depth of field. [0003] Therefore, it is particularly important to use the projection screen...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G03B21/60
Inventor张益民吴庆富胡世加
OwnerCHENGDU FSCREEN SCI TECH