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

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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 imag

Method used

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  • Projection screen and projection system
  • Projection screen and projection system

Examples

Experimental program
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Example Embodiment

[0046]Example one

[0047]Referencefigure 2 As shown, a projection screen of the present invention includes a cylindrical microlens layer 101, a first substrate layer 102, and a reflective microstructure layer 103 arranged along the thickness direction of the projection screen. The cylindrical microlens layer 101 is arranged on the first substrate layer. On one side of 102, the cylindrical microlens layer 101 includes a plurality of cylindrical microlenses 1011 arranged horizontally. The aspect ratio of the cylindrical microlenses 1011 gradually decreases from one side to the other along the vertical direction of the projection screen 10, marking the cylindrical microlenses 1011 The height of the cylindrical microlens 1011 is P, the aspect ratio of the cylindrical microlens 1011 is the ratio of the height of the cylindrical microlens 1011 to the width of the cylindrical microlens 1011, that is, the ratio of the cylindrical microlens 1011 Aspect ratio = T / P. The reflective microstructur...

Example Embodiment

[0071]Example two

[0072]On the basis of Example 1, such asPicture 9 As shown, diffusion particles and / or light-absorbing materials are provided on the columnar microlens layer.

[0073]Such asPicture 9 As shown in a, diffusion particles 1034 are arranged in the cylindrical microlenses 1011 of the cylindrical microlens layer. These diffusion particles 1034 can uniformly scatter the light passing through the cylindrical microlenses, and further make the light intensity distribution more uniform. Diffusion particles include, but are not limited to, silica 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 size is preferably 5nm~ 200nm. It should be noted that the cylindrical microlens of the present invention mainly relies on the change of the lens structure itself to realize the light diffusion adjustment effect, so the cylin...

Example Embodiment

[0078]Example three

[0079]The difference between the projection screen of this embodiment and the first embodiment is: refer toPicture 10 As shown in the side view of the projection screen, 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 formed on the columnar microlens layer 101. The cylindrical surface of the lens 1011 is formed by roughening treatment. The method of forming the rough surface 1012 here may be sandblasting or roughening of the mold surface, followed by transfer forming with glue or spraying glue with diffusion particles. The rough surface 1012 can further diffuse the light, 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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