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Projection screen and projection system

A technology of projection screen and cylindrical 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: 2021-01-08
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

Examples

Experimental program
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Effect test

Embodiment 1

[0047] refer to figure 2 As shown, a projection screen of the present invention includes a columnar microlens layer 101, a first substrate layer 102, and a reflective microstructure layer 103 arranged along the thickness direction of the projection screen, and the columnar microlens layer 101 is arranged on the first substrate layer On one side of 102, the columnar microlens layer 101 includes several columnar microlenses 1011 arranged laterally, and the aspect ratio of the columnar microlenses 1011 gradually decreases from one side to the other along the vertical direction of the projection screen 10, marked as columnar microlenses 1011 The height of the columnar microlens 1011 is T, and the width of the columnar microlens 1011 is P, then the aspect ratio of the columnar microlens 1011 is the ratio of the height of the columnar microlens 1011 to the width of the columnar microlens 1011, that is, the ratio of the columnar microlens 1011 Aspect ratio = T / P. The reflective mic...

Embodiment 2

[0072] On the basis of Example 1, as Figure 9 As shown, diffusing particles and / or light-absorbing materials are arranged on the columnar microlens layer.

[0073] Such as Figure 9 As shown in a, diffusion particles 1034 are provided in the columnar microlenses 1011 of the columnar microlens layer, and these diffusion particles 1034 can uniformly scatter light passing through the interior of the columnar microlenses, further making the light intensity distribution more uniform. Diffusion particles 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 200nm. It should be noted that the columnar microlens of the present invention mainly relies on the change of the lens structure itself to realize the light diffusion adjustment function,...

Embodiment 3

[0079] The difference between this embodiment and the projection screen of Embodiment 1 is that: refer to Figure 10 In the side view of the projection screen shown, the surface of the columnar microlens layer 101 away from the first substrate layer 102 is a rough surface 1012, and the rough surface 1012 is the columnar microlens on the columnar microlens layer 101. The cylindrical surface of the lens 1011 is roughened. Here, the rough surface 1012 may be formed by sandblasting or surface roughening of the mold, followed by transfer printing with glue or spraying glue with diffused particles. The rough surface 1012 can further diffuse the light, and play the role of uniform light, 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 columnar micro-lens layer, a first base material layer and a reflection microstructure layer which are arranged in the thickness direction of the projection screen, the columnar micro-lens layer is arranged at one side of the first base material layer, and the columnar micro-lens layer comprises a plurality of columnar micro-lenses which are transversely arranged. The height-width ratio of the columnar micro lens is gradually reduced from one side to the other side along the vertical direction of the projection screen, and the height-width ratio of the columnar micro lens is equal to the difference of the height of the columnar micro lens andthe width of the columnar micro lens; the reflection microstructure layer is provided with 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, and in particular relates to a projection screen and a projection system. Background technique [0002] Projection display requires a projector and a projection screen. The function of the projection screen is to image the image emitted by the projector and redistribute the projection light intensity. The fine structure diffuses and converges the projected light or controls the transmission direction of the light as needed to meet the needs of different viewing fields. The current widespread problem with projection screens is that the brightness displayed on the screen varies greatly in different viewing positions. Unlike LCD or LED screens, there will not be a large difference in display brightness within a large field of view, so projection One of the gaps between the screen and LCD or LED is that under different viewing fields of view on the projection screen, the viewer feels unev...

Claims

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Application Information

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IPC IPC(8): G03B21/602G03B21/60
CPCG03B21/602G03B21/60
Inventor 王起飞张益民胡强
Owner CHENGDU FSCREEN SCI TECH
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