CN210072309U

CN210072309U - Reflection type projection screen

Info

Publication number: CN210072309U
Application number: CN201921287134.0U
Authority: CN
Inventors: 陈明立; 苏振荣; 李郁慧; 林柏州
Original assignee: IFTC
Current assignee: IFTC; Innovision Flextech Corp
Priority date: 2019-08-09
Filing date: 2019-08-09
Publication date: 2020-02-14
Anticipated expiration: 2029-08-09

Abstract

The utility model relates to a reflection-type projection screen, it contains: a plurality of optical structures arranged in series, each optical structure including a reflecting surface and an absorbing surface, the reflecting surface being disposed obliquely to a horizontal plane, the absorbing surface being disposed obliquely to the horizontal plane and being opposite to the direction of inclination of the reflecting surface, and the optical structure being provided with: the light absorption layer covers the absorption surface, the second reflection layer is arranged on the reflection surface and positioned between the first reflection layer and the light absorption layer, and the reflectivity of the second reflection layer is higher than that of the first reflection layer; for promoting current projection screen's luminance and definition, the utility model discloses add the second reflector layer, provide the better reflection-type projection screen of luminance, light and shade contrast and the image definition of an image light.

Description

Reflection type projection screen

Technical Field

The present invention relates to a projection screen, and more particularly to a reflection-type projection screen capable of increasing the brightness of the light reflected by a projection device.

Background

In order to obtain a clear projection image, the conventional projection screen usually needs to shield an ambient light source (e.g., the sun, an electric lamp) during use, which is inconvenient to use and the quality of the image to be viewed is not clear enough.

The taiwan patent No. M374077 discloses a high-definition projection screen, which comprises a plurality of optical structures disposed on a substrate layer, wherein the optical structures are triangles arranged continuously, a reflective layer is disposed on an active surface of each optical structure, an absorption surface is disposed with a light absorption layer, the reflective layer can diffusely reflect light emitted by a projection device to form an image and project the image to a sight range of human eyes, and the light absorption layer can absorb light from the environment to reduce the influence of the environment light on the image contrast of the projection screen.

However, the conventional high-definition projection screen has room for further improvement in brightness and definition.

SUMMERY OF THE UTILITY MODEL

For luminance and definition that promote current projection screen, the utility model discloses an add the second reflection stratum on the plane of reflection, provide the better reflection-type projection screen of luminance, light and shade contrast and the image definition of an image light.

To achieve the above object, the present invention provides a reflection type projection screen, which comprises:

a plurality of optical structures arranged in series, each optical structure comprising a reflective surface and an absorbing surface, the reflective surface being disposed obliquely with respect to a horizontal plane, the absorbing surface being disposed obliquely with respect to the horizontal plane and being opposite to the reflective surface in an oblique direction, and:

a first reflecting layer disposed on the reflecting surface and capable of uniformly diffusing light while reflecting the light, and spaced from the absorbing surface;

a light absorption layer covering the absorption surface and extending to the extension surface of the reflection surface;

the light absorption layer is arranged between the first reflection layer and the light absorption layer, and the reflectivity of the second reflection layer is higher than that of the first reflection layer.

The reflective projection screen, wherein the light absorbing layer extends to the reflective surface and away from the first reflective layer.

The reflective projection screen, wherein the second reflective layer is connected to the first reflective layer and the absorbing layer.

The reflective projection screen, wherein the light absorbing layer partially covers the second reflective layer.

The reflective projection screen, wherein the area of the second reflective layer that can reflect light is smaller than the area of the first reflective layer that can reflect light.

The reflective projection screen, wherein the first reflective layer has a greater cross-sectional length than the second reflective layer.

The length of the first reflecting layer on the cross section is 3-4 times of the length of the second reflecting layer on the cross section.

The reflective projection screen includes a substrate layer, and the plurality of optical structures are disposed on the substrate layer.

In the reflective projection screen, the plurality of optical structures and the substrate layer are integrated into a single component, and the plurality of optical structures are formed on one surface of the substrate layer.

The reflective projection screen, wherein the second reflective layer extends to the absorbing surface and is covered by the light absorbing layer.

The reflective projection screen, wherein the second reflective layer is coupled to the first reflective layer.

The reflective projection screen, wherein the second reflective layer can have a reflectivity 2 to 8 times that of the first reflective layer.

The utility model discloses an efficiency that technical means can bring is promoted and is lain in:

the utility model discloses increase the higher second reflection stratum of reflectivity between first reflection stratum and light absorption layer, the second reflection stratum has higher reflection volume to projection arrangement light, can promote the image luminance that gets into spectator's sight, because the reason that the luminance of image improves, further can reach the effect that promotes light and shade contrast, color saturation and the image definition of image.

Drawings

Fig. 1 is a schematic view of a first preferred embodiment of the present invention.

Fig. 2 is a schematic side view of an optical structure according to a first preferred embodiment of the present invention.

Fig. 3 is a schematic view illustrating a first preferred embodiment of the present invention.

Fig. 4 is a schematic view of a second preferred embodiment of the present invention.

Fig. 5 is an optical structure diagram of a second preferred embodiment of the present invention.

Fig. 6 is a schematic top view of a curved surface according to the present invention. .

Detailed Description

The following description of the preferred embodiments of the present invention will be made in conjunction with the drawings and the accompanying drawings to further illustrate the technical means adopted to achieve the objects of the present invention.

Referring to fig. 1 to 3, a first preferred embodiment of the present invention includes a substrate layer 10 and a plurality of optical structures 20. The substrate layer 10 includes a first side and a second side opposite to each other. The substrate layer 10 can be a transparent substrate layer or an opaque substrate layer.

Referring to fig. 1 and 2, the plurality of optical structures 20 are disposed on the first surface of the substrate layer 10, and the plurality of optical structures 20 are arranged in series. Each optical structure 20 is a microstructure that is difficult to observe by the naked eye, and thus each figure is an enlarged side view of the optical structure 20. the optical structure 20 can be transparent or opaque.

Each optical structure 20 has a triangular cross-section, which includes a connecting surface 21, a reflecting surface 22 and an absorbing surface 23, and is provided with a first reflecting layer 30, a second reflecting layer 40 and an absorbing layer 50. The connecting surface 21 is connected to the first surface of the substrate layer 10, and the reflecting surface 22 and the absorbing surface 23 have an intersection angle therebetween, which is located at the horizontal plane H. The reflection surface 22 has an inclination angle θ 1 with respect to a horizontal plane H, and the absorption surface 23 has an inclination angle θ 2 with respect to the horizontal plane H, in fig. 2, the inclination slope of the reflection surface 22 is a positive inclination slope, the inclination slope of the absorption surface 23 is a negative inclination slope, and the reflection surface 22 and the absorption surface 23 are inclined in opposite directions. The intersection angle of the reflection surface 22 of one optical structure 20 and the absorption surface 23 of another optical structure 20 located therebelow is the sum of the inclination angle theta 1 and the inclination angle theta 2. The tilt angle θ 1 and the tilt angle θ 2 can be adjusted according to the requirements of a projection device 70 and an ambient light source 80.

Referring to fig. 3, the first reflective layer 30 is formed by partially disposing a reflective material on the reflective surface 22, and a distance is formed between the first reflective layer 30 and the absorption surface 23. The first reflective layer 30 can reflect the image light projected by the projection device 70 in the projection environment and uniformly diffuse the light to maintain a good viewing angle.

Referring to fig. 2, the second reflective layer 40 is formed by disposing a material having a higher reflectivity than the first reflective layer 30 on the reflective surface 22 and the absorbing surface 23; in the preferred embodiment of the present invention, the reflectivity of the second reflective layer 40 is 2-8 times that of the first reflective layer 30. The portion of the second reflective layer 40 on the reflective surface 22 is connected to the first reflective layer 30, and the area of the second reflective layer 40 on the reflective surface 22 is smaller than the area of the first reflective layer 30, so that the area of the second reflective layer 40 capable of reflecting the image light of the projection apparatus 70 is smaller than the area of the first reflective layer 30, and the portion of the second reflective layer 40 on the absorbing surface 23 can be partially or completely disposed on the absorbing surface 23. In a cross-section of the optical structure 20 reflective layer 30, the length 30A of the first reflective layer 30 is greater than three to four times the length 40A of the second reflective layer 40. Referring to fig. 3, compared to the first reflective layer 30 that diffuses light uniformly during reflection, the second reflective layer 40 can reflect the image light projected by the projection device 70 directly into the viewing range of the viewer 60 to improve the brightness of the image.

Referring to fig. 2 and 3, the light absorption layer 50 is formed by disposing a light absorption material on the second reflection layer 40, covers the portion of the second reflection layer 40 on the absorption surface 23, and extends to the reflection surface 22 and away from the first reflection layer 30. The light absorption layer 50 can absorb the light from the ambient light source 80 impinging on the absorption surface 23, and can also absorb the light from the ambient light source 80 impinging on the second reflective layer 40 of the other optical structure 20 located above and reflected downward in fig. 3.

During the use, the utility model discloses the image light that this first reflection stratum 30 that is located on this plane of reflection 22 can throw this projection device 70 out reflects the diffusion uniformly and has good visual angle, it is average to mean that the image brightness that obtains at each visual angle, this absorbed layer 50 can absorb this ambient light source 80's light, let this ambient light source 80's light can not influence the definition of the image of throwing on the projection screen, and be located this second reflection stratum 40 reflectivity on this plane of reflection 22 is higher, and there is higher reflection capacity to the image light that this projection device 70 throws out, can promote the image brightness who gets into audience 60's sight, because the luminance improves the reason, further can reach the effect that promotes the light and shade contrast of image, color saturation and image definition.

Use darkroom test to measure, and this projection arrangement 70 is right the utility model discloses an illuminance is 1000lux for the example, and this first reflection stratum 30 luminance scope of surveying at spectator 60's visual angle is 150 ~ 300nit, and this second reflection stratum 40 luminance scope of surveying is 600 ~ 1200 nit.

Referring to fig. 4 and 5, the second preferred embodiment of the present invention is different from the first preferred embodiment in that the light absorbing layer 50 is directly disposed on the absorbing surface 23, extends to the reflecting surface 22 and is away from the first reflecting layer 30 to cover the intersection angle between the reflecting surface 22 and the absorbing surface 23, and the second reflecting layer 40 is disposed on the reflecting surface 22 and is connected to the first reflecting layer 30 and the light absorbing layer 50, so long as the second reflecting layer 40 is disposed between the first reflecting layer 30 and the light absorbing layer 50 to reflect light, the effects of enhancing brightness, contrast and image definition can be achieved.

In other embodiments, the substrate layer 10 and the plurality of optical structures 20 can be a unitary, single component.

In other embodiments, as shown in the top view of the present invention shown in fig. 6, the projection screen can also be a curved projection screen.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, but not to limit the present invention, any person skilled in the art can make modifications or changes to equivalent embodiments without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments by the technical spirit of the present invention still fall within the scope of the present invention.

Claims

1. A reflective projection screen, comprising:

2. A reflective projection screen according to claim 1, wherein said light absorptive layer extends to said reflective surface and away from said first reflective layer.

3. A reflective projection screen according to claim 2, wherein said second reflective layer is contiguous with said first reflective layer and said absorptive layer.

4. A reflective projection screen according to claim 3, wherein said light absorptive layer partially covers said second reflective layer.

5. The reflective projection screen of claim 4, wherein the second reflective layer reflects light over a smaller area than the first reflective layer.

6. The reflective projection screen of claim 5 wherein the first reflective layer has a cross-sectional length greater than the cross-sectional length of the second reflective layer.

7. The reflective projection screen of claim 6 wherein the first reflective layer has a cross-sectional length that is 3 to 4 times the cross-sectional length of the second reflective layer.

8. A reflective projection screen according to claim 7, comprising a substrate layer, said plurality of optical structures being disposed on said substrate layer.

9. The reflective projection screen of claim 8, wherein the plurality of optical structures are formed on one side of the base layer as a unitary, one-piece member with the base layer.

10. A reflective projection screen according to claim 1, wherein said second reflective layer extends to said absorbing surface and is covered by said light absorbing layer.

11. A reflective projection screen according to claim 10, wherein said light absorptive layer extends to said reflective surface and away from said first reflective layer.

12. The reflective projection screen of claim 11 wherein said second reflective layer is contiguous with said first reflective layer.

13. The reflective projection screen of claim 12, wherein the second reflective layer reflects light over a smaller area than the first reflective layer.

14. The reflective projection screen of claim 13 wherein the first reflective layer has a cross-sectional length greater than the cross-sectional length of the second reflective layer.

15. The reflective projection screen of claim 14 wherein the first reflective layer has a cross-sectional length that is 3 to 4 times the cross-sectional length of the second reflective layer.

16. The reflective projection screen of claim 15, comprising a substrate layer, wherein the plurality of optical structures are disposed on the substrate layer.

17. The reflective projection screen of claim 16, wherein the plurality of optical structures are formed on one side of the base layer as a unitary, one-piece member with the base layer.

18. Reflective projection screen according to any of claims 1 to 17, wherein the reflectivity of the second reflective layer can be 2 to 8 times the reflectivity of the first reflective layer.