阅读说明：本技术 一种高对比度反射屏幕 (High-contrast reflecting screen ) 是由 胡飞 张红秀 王霖 于 2018-05-31 设计创作，主要内容包括：本发明提供了一种新型的反射屏幕。所述屏幕包括依次层叠的支撑层和反射层,其中所述反射层由反射部分和调整部组成,所述调整部用于调整所述反射层的反射率,以使得所述反射层的反射率为10％-50％。根据本发明的反射屏幕通过减小反射层的占空比来减小反射层的有效反射率而使得无需额外添加用于吸收环境光的吸光层,就可以达到高对比度效果,减少了工艺难度和屏幕成本。(The present invention provides a novel reflective screen. The screen comprises a supporting layer and a reflecting layer which are sequentially stacked, wherein the reflecting layer consists of a reflecting part and an adjusting part, and the adjusting part is used for adjusting the reflectivity of the reflecting layer so that the reflectivity of the reflecting layer is 10% -50%. According to the reflective screen, the effective reflectivity of the reflective layer is reduced by reducing the duty ratio of the reflective layer, so that a light absorption layer for absorbing ambient light is not required to be additionally added, a high-contrast effect can be achieved, and the process difficulty and the screen cost are reduced.)

1. a reflective screen comprising a support layer and a reflective layer laminated in this order,

The reflective layer is composed of a reflective part and an adjusting part, and the adjusting part is used for adjusting the reflectivity of the reflective layer so that the reflectivity of the reflective layer is 10% -50%.

2. The reflective screen of claim 1,

The supporting layer comprises a base layer and a Fresnel structure layer which are sequentially stacked, wherein the reflecting layer is arranged on the other surface, opposite to the surface, in contact with the base layer, of the Fresnel structure layer.

3. The reflective screen of claim 2,

The side of the reflective layer facing away from the fresnel structure layer includes a light absorbing layer.

4. The reflective screen of claim 3,

Including a diffuser layer on the side of the base layer facing away from the fresnel structure layer.

5. The reflective screen of claim 3,

The surface of the base layer, towards which light is incident, is of a surface diffusion structure.

6. The reflective screen of claim 1,

Scattering particles are added in the reflecting layer, and the diameter of the scattering particles is 1-100 um.

7. The reflective screen of claim 1, wherein said adjusting portion is comprised of a through hole.

8. The reflective screen of claim 7, wherein the through holes are formed by laser perforation of the reflective layer.

9. The reflective screen of claim 7, wherein said through holes are formed by screen printing said reflective layer.

10. The reflective screen of claim 7, wherein said through holes are formed by selective exposure and development of said reflective layer.

11. The reflective screen of claim 1 wherein the reflective layer has a reflectivity of 10% to 30%.

Technical Field

The present invention relates to a high contrast reflective screen, and more particularly, to a high contrast reflective screen with a simple structure and low cost.

Background

In recent years, a projection system has been developed which realizes projection of a large screen of more than 100 inches with a distance between a projector and the screen of 50cm, which is capable of overcoming the limitation of an installation space, but when the projection system is installed in an environment where a large amount of stray light exists, such as a bright living room, the image display on the projection screen often has problems as follows: the screen reflects ambient light to cause interference with signal light, and thus it is difficult to obtain a good contrast. To address this problem, it is common practice to add a dark light absorbing layer to absorb the ambient light, and for prismatic structured screens, it is conventional practice to provide a light absorbing layer on the surface of the prism facing the ambient light.

in addition, uniformity and viewing angle of light reflected from the screen are important indicators for measuring the quality of the screen. The scattering structure arranged in the screen can generate uniform light and eliminate the effect of glare. The scattering is divided into volume scattering and surface scattering, and the volume scattering can be realized by adding scattering particles into a screen base layer; surface scattering can be achieved by providing a diffusing structure, such as a diffusing layer, a frosted surface, an optical microstructure, etc., on the surface of the substrate or other structure of the screen. The reflective screen which well combines the function of absorbing the environmental light and the function of scattering light of the screen is few and few, the common method is to arrange a dark light absorption layer and a diffusion particle layer, and the finally formed screen has complex process, high cost and poor effect.

Therefore, a problem to be solved is to develop a reflective screen with high contrast ratio and low process difficulty and cost.

Disclosure of Invention

In view of the above, the present invention is directed to a novel reflective screen, which can achieve a high contrast effect without adding an additional light absorption layer, and reduce process difficulty and screen cost.

The invention provides a reflective screen, which comprises a supporting layer and a reflecting layer which are sequentially stacked, wherein the reflecting layer consists of a reflecting part and an adjusting part, and the adjusting part is used for adjusting the reflectivity of the reflecting layer so that the reflectivity of the reflecting layer is 10% -50%, preferably 10% -30%.

Preferably, the support layer comprises a base layer and a fresnel structure layer which are stacked in sequence, wherein the reflective layer is arranged on the other surface of the fresnel structure layer opposite to the surface contacting with the base layer.

Preferably, the side of the reflective layer facing away from the fresnel structure layer comprises a light-absorbing layer.

Preferably, the screen comprises a diffuser layer on the side of the base layer facing away from the fresnel structure layer.

preferably, the surface of the base layer, towards which light is incident, is a surface diffusion structure.

Preferably, scattering particles are added in the reflecting layer, and the diameter of the scattering particles is 1-100 um.

Preferably, the adjusting part is composed of a through hole.

Preferably, the through-hole is formed by laser-perforating the reflective layer.

Preferably, the through-hole is formed by screen-printing the reflective layer.

preferably, the through hole is formed by selectively exposing and developing the reflective layer.

Advantageous effects

The invention provides a high-contrast projection screen, which comprises a supporting layer and a reflecting layer, wherein the effective reflectivity of the reflecting layer is reduced to 10-50%, preferably 10-30% by reducing the duty ratio of the reflecting layer, so that a high-contrast effect can be achieved without additionally adding a light absorbing layer, and the process difficulty and the screen cost are reduced.

in addition, the effective utilization of projection light is realized by controlling the surface profile of the reflecting layer and combining the arrangement of the diffusion layer, and meanwhile, the contrast ratio and the scattering uniformity of the screen are improved.

In other words, the present invention provides a screen which has a simple structure and a low cost, can absorb the ambient light in all directions, and uniformly scatter the projection light. Therefore, even when the reflective screen of the present invention is used in an environment where a large amount of stray light exists, such as a bright living room, a good contrast can be obtained.

drawings

The drawings represent non-limiting exemplary embodiments described herein. It will be appreciated by those skilled in the art that the components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention. In the drawings:

Fig. 1 is a schematic sectional view showing the structure of a screen according to embodiment 1 of the present invention.

Fig. 2 is a schematic view showing a specific structure of the reflective layer of the screen according to embodiment 1 of the present invention.

Fig. 3 is a schematic sectional view showing the structure of a screen according to embodiment 2 of the present invention.

Fig. 4 is a schematic sectional view showing the structure of a screen according to embodiment 3 of the present invention.

List of reference numerals

101: diffusion layer

102: PET base layer

103: fresnel structure layer

104: reflective layer

105: light absorbing layer

104 a: non-reflection part

104 b: reflective part

201: PET base layer

202: fresnel structure layer

203: reflective layer

204: light absorbing layer

301: reflective layer

302: fresnel structure layer

303: PET base layer

Detailed Description

One or more exemplary embodiments of the present invention are described more fully hereinafter with reference to the accompanying drawings, in which one or more exemplary embodiments of the invention can be readily ascertained by one skilled in the art. As those skilled in the art will recognize, the exemplary embodiments may be modified in various different ways without departing from the spirit or scope of the present invention, which is not limited to the exemplary embodiments described herein.

The invention provides a high-contrast reflecting screen with simple structure and low cost, and develops a mode for improving the contrast of the screen by reducing the effective reflectivity of a reflecting layer.