CN111273386A

CN111273386A - Optical film

Info

Publication number: CN111273386A
Application number: CN202010259549.8A
Authority: CN
Inventors: 郭滨刚
Original assignee: Shenzhen Guangke Holographic Technology Co ltd
Current assignee: Shenzhen Guangke Holographic Technology Co ltd
Priority date: 2020-04-03
Filing date: 2020-04-03
Publication date: 2020-06-12

Abstract

The invention provides an optical film which comprises a substrate layer, a reflecting layer and an anti-light layer, wherein the reflecting layer is arranged on one surface of the substrate layer, and the anti-light layer is arranged on the reflecting layer. After receiving the light projected by projection, the optical film reflects the projection light, the light-resistant layer can absorb the ambient light, and the light-resistant layer structures are randomly and uniformly distributed on the reflecting layer, so that the image gain is high, the brightness is uniform, the image contrast is improved, the color reducibility is good, and meanwhile, the optical film is simple in manufacturing process and low in manufacturing cost.

Description

Optical film

Technical Field

The present invention relates to an optical film.

Background

With the accelerated social work rhythm, the frequent and random working meetings, a large number of small-sized meeting rooms are raised, and the brightness of the light of the meeting rooms is generally not suitable for the projection of the existing common curtain. The optical structure of the existing front projection optical screen generally comprises projection paint and a projection filter film, and the structure not only causes low picture quality and inconsistent definition, but also has technical problems in brightness uniformity, integral contrast, ambient light resistance and the like. For example, an ordinary white projection screen cannot selectively reflect light to cause confusion of ambient light and light of a projector, so that a projection picture is whitened, the color is distorted, and it is not practical to turn on a lamp, because it is not beneficial for participants to note under a dim environment, the damage to eyes of people when watching a screen under a dim environment is increased, furthermore, the dim environment also generates negative emotion to the participants to directly influence the decision-making capability of the participants, so that the meeting quality is reduced, although some existing optical films (black screens) can resist ambient light, the gain is too low, only about half of the ordinary glass-fiber screen cloth, a high-lumen projector is required to be used to achieve proper brightness and definition, so that the use cost of the projector is increased, furthermore, the triangular grating of the black screen needs to control the consistency of the size and the period of each grating in the manufacturing process, it is also necessary to arrange the reflective layer precisely without stripes of black and white unevenness, which makes the precision requirements of the manufacturing equipment very high, which makes the manufacturing very costly.

Disclosure of Invention

In order to solve the technical problems, the invention provides the following technical scheme:

the invention provides an optical film which comprises a substrate layer, a reflecting layer and an anti-light layer, wherein the reflecting layer is arranged on one surface of the substrate layer, and the anti-light layer is arranged on the reflecting layer.

Further, the material of the substrate layer is one of PU, PP, PMMA, PET, PC and vinyl.

Further, the reflecting layer is arranged on the substrate layer in a coating, sticking or vacuum coating mode.

Further, the light-resistant layer is disposed on the reflective layer by printing.

Further, the reflecting layer is made of metal substances, the metal substances are made of one or a mixture of silver powder, aluminum powder and metal oxide, and the metal oxide is titanium dioxide or aluminum oxide.

Further, the reflectivity of the reflective layer is higher than 90%.

Further, the light-resistant layer is composed of a light-absorbing substance having an absorptivity of more than 90%.

Further, the light absorbing substance is black ink.

Further, the light-resistant layer is composed of a plurality of micro-nano point-shaped particles, and the plurality of point-shaped particles are randomly distributed on the reflecting layer.

Further, the height of the point-shaped particles is 10-15 micrometers, the diameter range of the point-shaped particles is 20-60 micrometers, and a plurality of point-shaped particles account for 45% -65% of the whole curtain surface.

The invention has the beneficial effects that: after receiving the light projected by projection, the optical film reflects the projection light, the light-resistant layer can absorb the ambient light, and the light-resistant layer structures are randomly and uniformly distributed on the reflecting layer, so that the image gain is high, the brightness is uniform, the image contrast is improved, the color reducibility is good, and meanwhile, the optical film is simple in manufacturing process and low in manufacturing cost.

Drawings

FIG. 1 is a schematic front view of an optical film of the present invention;

FIG. 2 is a schematic side view of an optical film of the present invention;

Detailed Description

Referring to fig. 1 and 2, an optical film includes a substrate layer 1, a reflective layer 2, and a light-resistant layer 3, wherein the reflective layer 2 is disposed on one side of the substrate layer 1, and the light-resistant layer 3 is disposed on the reflective layer 2.

Further, the material of the substrate layer 1 is one of PU, PP, PMMA, PET, PC, and vinyl.

Further, the reflective layer 2 is disposed on the substrate layer 1 by coating, pasting, vacuum coating, or the like.

Further, the light-resistant layer 3 is provided on the reflective layer 2 by printing or the like.

Further, the reflective layer 2 is made of a metal substance, for example: silver powder, aluminum powder, metal oxide or other high reflectivity matter, and the metal oxide may be titania or alumina.

Further, the reflectivity of the reflective layer is higher than 90%.

Further, the light-resistant layer 3 is composed of light-absorbing substances with absorptivity exceeding 90%, the light-absorbing substances can be black ink, the light-resistant layer 3 is of a micro-nano structure and is uniformly distributed on the reflecting layer in a point shape, the height of each point is approximately 10-15 micrometers, the diameter range of each point particle is 20-60 micrometers, the number of the points with diameters of 30-50 micrometers accounts for about 70% of the total number of the point particles, the number of the other points with diameters accounts for about 30% of the total number of the point particles, and a plurality of point particles account for 45-65% of the whole screen surface, preferably 55-60%. Because the height of the point can realize better effect in the above range, the display brightness of the corner is reduced due to too high height, the absorption capacity to the environment light is reduced due to too short height, and the area of the point distribution is about 45-65% of the area of the reflecting layer, thereby ensuring the brightness of the optical film and not influencing the uniformity and color reducibility of the reflecting layer to the light reflection.

According to the invention, when light of the projector strikes the projection optical film, the reflection layer reflects the projection light, the light-resistant layer absorbs ambient light, and the light-resistant layer structure is randomly and uniformly distributed on the reflection layer, so that the picture gain is high, the optical film has a good effect of resisting ambient light, and meanwhile, the optical film is simple in manufacturing process and low in manufacturing cost.

The advantageous effects of the present invention are further illustrated below according to specific examples:

in the optical film, a PU material is selected as a substrate layer 1, a silver powder and aluminum powder is selected as a reflecting layer 2, black ink is selected as an anti-light layer 3, then the reflecting layer 2 is arranged on the substrate in a coating mode, the anti-light layer 3 is arranged on the reflecting layer 2 in a printing mode, the diameter range of points in the anti-light layer 3 of the optical film is 20-60 um, and for the optical film adopting the parameters, according to a brightness coefficient, an effective scattering angle and an environmental interference resistance test method specified in the JB/T11375 and 2013 ultrafine crystal projection screen, the effective scattering angle of the optical film is 60 +/-5 degrees and is not less than 40 degrees specified in the standard, the environmental interference resistance is more than 85 percent and is not less than 75 percent specified in the standard, and the gain (brightness coefficient) is 1.1-1.2 and is not less than 1.1 specified in the standard.

The data show that the optical film of the invention has high effect of resisting the interference of the ambient light, ensures high gain and has a large visual angle range.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An optical film, characterized in that: the reflective coating comprises a substrate layer, a reflective layer and an anti-light layer, wherein the reflective layer is arranged on one surface of the substrate layer, and the anti-light layer is arranged on the reflective layer.

2. The optical film of claim 1, wherein: the base layer is made of one of PU, PP, PMMA, PET, PC and vinyl.

3. The optical film of claim 1, wherein: the reflecting layer is arranged on the substrate layer in a coating, sticking or vacuum coating mode.

4. The optical film of claim 1, wherein: the light-resistant layer is arranged on the reflecting layer in a printing mode.

5. The optical film of claim 1, wherein: the reflecting layer is composed of a metal substance, the metal substance is one or a mixture of silver powder, aluminum powder and metal oxide, and the metal oxide is titanium dioxide or aluminum oxide.

6. The optical film of claim 1, wherein: the reflectivity of the reflective layer is higher than 90%.

7. The optical film of claim 1, wherein: the light-resistant layer is composed of light-absorbing substances with absorptivity exceeding 90%.

8. The optical film of claim 1, wherein: the light absorbing substance is a black ink.

9. The optical film of claim 1, wherein: the light resisting layer is composed of a plurality of micro-nano point-shaped particles, and the point-shaped particles are randomly distributed on the reflecting layer.

10. The optical film of claim 9, wherein: the height of the point-shaped particles is 10-15 microns, the diameter range of the point-shaped particles is 20-60 microns, and a plurality of point-shaped particles account for 45% -65% of the whole screen surface.