Projection screen and projection system

A technology of projection screen and microlens, which is applied in the field of projection display, can solve the problems of uneven image intensity and uneven distribution of light intensity displayed on the projection screen, and achieve the effect of improving the uniform effect of display brightness

Inactive Publication Date: 2020-11-13
CHENGDU FSCREEN SCI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a projection screen to solve the problem of uneven intensity of images displayed on the projection screen caused by the uneven distribution of light intensity of the light source in the existing projection screen

Method used

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  • Projection screen and projection system

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Experimental program
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Effect test

Embodiment 1

[0045] such as Figure 2 Shown is the schematic diagram of the projection screen structure. such as Figure 2 A shows the bottom view of the projection screen, as shown in Figure 2 B shows the front view of the projection screen, as shown in Figure 2 C shows the left view of the projection screen. The projection screen includes a diffusion layer 101, a first substrate layer 102 and a reflective microstructure layer 103 arranged along the thickness direction of the projection screen, and the diffusion layer 101 is arranged on one side of the first substrate layer 102. The diffusion layer 101 comprises at least one microlens layer, and the microlens layer comprises a plurality of microlenses 1011, wherein at least one of the microlenses 1011 is a central microlens 1011, and other microlenses 1011 are arranged around the center of the central microlens 10111. In the figure, the height of the microlens 1011 is T, the width of the microlens 1011 is P, and the aspect ratio of the microlen...

Embodiment 2

[0064] On the basis of the first embodiment, for example Figure 7 As shown, diffusion particles and / or light absorbing materials are arranged on the diffusion layer.

[0065] such as Figure 7 As shown in Figure A, the diffusion layer includes a microlens layer, which includes several microlenses 1011, and diffusion particles 1034 are arranged in the microlenses 1011. These diffusion particles 1034 can uniformly scatter the light passing through the microlenses 1011, further making the light intensity distribution more uniform. The diffusion particles 1034 include, but are not limited to, silicon dioxide particles, aluminum oxide particles, titanium oxide particles, cerium oxide particles, zirconium oxide particles, tantalum oxide particles, zinc oxide particles, magnesium fluoride particles, etc., and their particle diameters are preferably 5 nm to 200 nm.

[0066] It should be noted that the microlens mainly depends on the change of the lens structure itself to realize the diffus...

Embodiment 3

[0073] This embodiment differs from the projection screen of the first embodiment in that: refer to Figure 8 As shown in the bottom view of the projection screen, the surface of the diffusion layer 101, which is far away from the first base material layer 102, is a rough surface 1012. The diffusion layer 101 includes a microlens layer, which includes a plurality of microlenses 1011. The rough surface 1012 is formed by roughening the spherical surface of the microlenses 1011. Here, the rough surface 1012 can be formed by sand blasting or mold surface roughening, and then glue with diffusion particles can be transferred or sprayed. The rough surface 1012 can further diffuse light, and play the roles of light equalization, hardening protection and imaging.

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Abstract

The invention provides a projection screen and a projection system, and belongs to the field of projection display. The projection screen comprises a diffusion layer, a first base material layer and areflection microstructure layer which are arranged in the thickness direction of the projection screen, and the diffusion layer is arranged on one side of the first base material layer; the diffusionlayer comprises at least one micro lens layer; the microstructure layer comprises a plurality of micro lenses; at least one of the micro lenses is a central micro lens, the other micro lenses are divergently arranged around the central micro lens, the depth-to-width ratio of the micro lenses is gradually reduced in the divergent arrangement direction, and the depth-to-width ratio of the micro lenses is equal to the height of the micro lenses/the width of the micro lenses; the reflection microstructure layer comprises a plurality of microstructures, and the microstructures are arc-shaped or parabola-shaped or oval or linear. The projection system comprises a projector and the projection screen. According to the invention, the brightness uniformity of the projection screen and the projection system is improved.

Description

Technical field [0001] The invention belongs to the technical field of projection display, in particular to a projection screen and a projection system. technical background [0002] Projection requires projector and projection screen. The function of projection screen is to image the image emitted by projector and redistribute the projected light intensity. The redistribution of projected light intensity by projection screen depends on various fine structures on the screen to diffuse and converge the projected light or control the transmission direction of the light according to the needs to meet the needs of different viewing fields. Nowadays, the widespread problem of projection screens is that the brightness displayed on the screen is very different in different viewing positions, unlike LCD or LED screens, which have no big difference in display brightness in a large field of view. Therefore, one of the differences between projection screens and LCD or LED is that the bright...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/602G03B21/60
CPCG03B21/60G03B21/602
Inventor 王起飞张益民胡强林胜利
Owner CHENGDU FSCREEN SCI TECH
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