Projection screen and projection system

A projection screen, circular technology, applied in the field of optical projection, can solve the problems of high energy consumption, low brightness uniformity, and low image contrast of the projection system, and achieve high image clarity, high light energy utilization, and high brightness. Effect

Inactive Publication Date: 2020-02-21
CHENGDU FSCREEN SCI TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a projection screen and a projection system to improve the existing projection screen and system problems of low brightness uniformity, low image contrast, low light energy utilization rate and high energy consumption of the projection system

Method used

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

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Embodiment Construction

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is only a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0036] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the a...

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Abstract

The invention provides a projection screen and a projection system, which belong to the technical field of optical projection. The projection screen comprises a circular Fresnel lens layer, an imagingelement layer, an optical structure layer and a reflection layer, which are sequentially arranged in the thickness direction. The circular Fresnel lens layer is composed of a plurality of circular Fresnel lens structures with the circle centers at the same point. The optical structure layer is composed of a plurality of linear triangular optical structures which are arranged in rows. The cross section of the optical structure layer in the thickness direction is sawtooth-shaped. The vertex angle of each linear triangular optical structure far away from the imaging element layer ranges from 70degrees to 110 degrees. The projection system is composed of the projection screen and a projection device. The projection screen and the projection system, which are provided by the invention, have the advantages of high brightness, high light energy utilization rate, high image definition, good ambient light resistance, high contrast ratio and excellent projection display effect.

Description

technical field [0001] The invention relates to the technical field of optical projection, in particular to a projection screen and a projection system. Background technique [0002] With the continuous development of screen display technology, projection has been widely used as a simple and convenient display method, for example, family entertainment or office needs. Among them, when displaying by projection, an indispensable device is a projection screen. Therefore, the performance of the projection screen directly determines the viewer's acceptance of the projection display. [0003] Now commonly used projection screens such as white plastic screens can only diffusely reflect the light beam output by the projection device, and cannot effectively control the transmission direction of the light beam, nor can it effectively control the transmission of ambient light, so the brightness of the projection screen will be uneven. The overall brightness coefficient is low and the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/625G03B21/602
CPCG03B21/602G03B21/625
Inventor 张益民王祖熊胡世加吴庆富
Owner CHENGDU FSCREEN SCI TECH
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