CN217879971U

CN217879971U - Projection curtain

Info

Publication number: CN217879971U
Application number: CN202221673958.3U
Authority: CN
Inventors: 郭滨刚; 李州; 陈嘉婷
Original assignee: Shenzhen Guangke Holographic Technology Co ltd
Current assignee: Shenzhen Guangke Holographic Technology Co ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2022-11-22
Anticipated expiration: 2032-06-30

Abstract

The utility model discloses a projection curtain, which comprises a reflecting film and a matte light scattering film laminated with the reflecting film; the reflecting film is provided with through holes and/or bubble gaps; the glossiness of the matte light scattering film is 1-25, and the light transmittance of the matte light scattering film is larger than 80%. The utility model discloses a projection curtain not only has the high-gain, has great visual angle moreover.

Description

Projection curtain

Technical Field

The utility model relates to a projection technology field, more specifically relates to a projection curtain.

Background

With the continuous improvement of curtain performance, the product types are continuously enriched, and the projection curtain begins to occupy an important position in the market. To achieve higher projection effect, selecting a curtain with proper size, proportion, viewing angle and type is a matter that must be considered.

The energy of light is conserved, so the relationship between gain and viewing angle is relative, with smaller gains giving larger viewing angles and conversely larger gains giving smaller viewing angles. Although the projection screen with a low gain can faithfully reproduce an image, it is very susceptible to the influence of ambient light. Although the projection screen with high gain has strong environmental adaptability, the viewing angle is too small, for example, the high gain screen commonly available in the market is a metal screen, and the gain is about 2.5, but the viewing angle is only about 60 °. Therefore, a high-gain projection screen with a large viewing angle is needed in the market.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the above-mentioned defect that prior art exists, provide a projection curtain of high gain and great visual angle.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

a projection curtain comprising a reflective film and a dummy light-scattering film laminated with the reflective film;

the reflecting film is provided with through holes and/or bubble gaps;

the glossiness of the matte light-scattering film is 1-25, and the light transmittance of the matte light-scattering film is greater than 80%.

Implement the embodiment of the utility model provides a, will have following beneficial effect:

the embodiment of the utility model provides a through setting up mute light scattering membrane, mute light scattering membrane can be refracted, scatter and mute light to be handled, and light gets into from mute light scattering membrane, gets into the reflectance coating after the refraction and the scattering of mute light scattering membrane, is emergent after the refraction and the scattering of via mute light scattering membrane again after being reflected by the reflectance coating, the utility model discloses a mute light scattering membrane has lower glossiness, and glossiness is low, and the gain reduces to some extent, but the glossiness is high, can reduce the scattering effect to but reduce the visual angle.

The utility model discloses a be equipped with through-hole and/or bubble clearance in the reflectance coating, the medium in through-hole and/or the bubble clearance is the air, its refracting index is minimum, about 1, the refracting index of air and reflectance coating differs great, so, when light gets into through-hole and/bubble clearance from the reflectance coating, light takes place the refraction in the interface department in reflectance coating and through-hole and/bubble clearance, when the angle of incidence is greater than the critical angle, refraction light will disappear, incident light is by the total reflection, through-hole and/bubble clearance exist promptly can greatly increased the reflectivity of light, thereby improve the gain of curtain, consequently, the utility model discloses a projection curtain is high gain not only, but also has great visual angle.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Wherein:

fig. 1 is a schematic cross-sectional view of a projection curtain according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, the present invention discloses a projection curtain, including reflective film 10 and the dumb light scattering film 20 laminated with reflective film 10, reflective film 10 is equipped with through-hole and/or bubble gap 11, the glossiness of dumb light scattering film 20 is 1 ~ 25, the luminousness of dumb light scattering film 20 is greater than 80%, dumb light scattering film 20 can refract, scatter and dumb light processing to light, light gets into from dumb light scattering film 20, gets into reflective film 10 after the refraction and scattering of dumb light scattering film 20, is reflected by reflective film 10 and then is emergent after the refraction and scattering of dumb light scattering film 20, the utility model discloses a be equipped with through-hole and/or bubble gap 11 in reflective film 10, the medium in through-hole and/or bubble gap 11 is air, its refracting index is minimum, is about 1, the refracting index of air and reflective film 10 differs greatly, so, when light gets into through-hole and/bubble gap from reflective film 10, light refracts in the interface of through-hole and/bubble gap, when the incident angle is greater than the critical angle, the incident light is by the incident light, thereby the light and the total reflection gain of incident light and the through-hole can be greatly increased.

The utility model discloses a mute light scattering membrane 20 has lower glossiness, and glossiness is low, and the gain reduces to some extent, but the glossiness is high, can reduce the scattering effect to but reduce the visual angle, the utility model discloses a mute light scattering membrane 20 still has the high light transmissivity, avoids losing light, improves the gain. Therefore, the projection curtain of the utility model not only has high gain, but also has a larger visual angle.

Preferably, the matte light-scattering film 20 has a gloss of 7 to 15, and can provide both a superior scattering effect and a large viewing angle.

Further, in an embodiment, the reflectivity of the reflective film 10 is greater than 92%, and increasing the reflectivity of the reflective film 10 is beneficial to enhancing the reflected light, thereby increasing the gain.

Further, in a specific embodiment, the refractive index of the dummy light scattering film 20 is 1.4 to 1.6, which can provide a large viewing angle.

Further, in one embodiment, the difference between the refractive index of the reflective film 10 and the refractive index of the medium in the through-hole and/or the air-bubble gap is 0.1 to 1. The greater the difference between the refractive index of the reflective film 10 and the refractive index of air, the higher the probability of total reflection of light at the interface between the reflective film 10 and the through-hole and/or bubble gap 11, and the more light is totally reflected, the higher the gain can be. Preferably, the difference between the refractive index of the reflective film 10 and the refractive index of the medium in the through-hole and/or bubble gap is 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or 1.

Further, in a specific embodiment, the area of the through holes and/or the air bubble gaps 11 accounts for 30 to 70 percent of the cross-sectional area of the reflective film 10 in the thickness direction of the reflective film 10, the length of the through holes and/or the air bubble gaps 11 is 0.5 to 10 μm, and the height of the through holes and/or the air bubble gaps 11 is 0.01 to 10 μm.

Specifically, in a preferred embodiment, the reflective film 10 can be a PET foamed film having a reflectivity greater than 92%, a refractive index of 1.4-2.1, and a thickness of 30 μm-400 μm, and can provide high light reflectivity and high gain.

In one embodiment, the projection screen comprises a PET foamed film and a dummy light scattering film 20 laminated thereto, and the dummy light scattering film 20 and the PET foamed film are directly purchased separately and laminated together by pressing or gluing to form the projection screen.

In another embodiment, the projection screen may also include a substrate 30, and the reflective film 10 and the dummy light scattering film 20 sequentially disposed on the substrate 30, and the substrate 30 may have functions of supporting, adhering, protecting, or waterproofing. The reflective film 10 may be formed by coating a reflective film 10 paste on the substrate 30 and curing the paste. The prepared or purchased matte light scattering film 20 may be pressed or glued together with the reflective film 10 formed as described above, or a slurry of the matte light scattering film 20 may be further applied on the cured reflective film 10 and the slurry cured to form the matte light scattering film 20.

The PET foamed film may also be formed by preparing a slurry and then coating the slurry on the substrate 30 and curing.

In one embodiment, the matte light scattering film 20 is a polymer film embedded with matte particles 21, the matte particles 21 have a matte and scattering effect, and the matte particles 21 may be selected from magnesium oxide, yttrium oxide, zinc sulfide, zinc selenide, gallium arsenide, magnesium fluoride, calcium fluoride, aluminum oxide, and silicon oxide (SiO) _x ) Titanium oxide (TiO) _x ) And niobium oxide (NbO) _x ) And the like, or two or more thereof. The matte particles 21 have a high doping amount, and although the scattering effect and the viewing angle are improved, the light transmittance of the matte light scattering film 20 is reduced, and the gain is lost.

In another embodiment, the dummy light scattering film 20 may be a polymer film having a surface with a concave-convex structure, and the concave-convex structure may perform a matte and scattering function and may be formed by embossing.

Specifically, in the above two embodiments, the polymer film may be a CPP film (cast polypropylene film), a BOPP film (biaxially oriented polypropylene film), or the like, which has high light transmittance, and the light transmittance is greater than 90%.

The thickness of the dummy light-scattering film 20 may be 1 μm to 100 μm.

The following are specific examples.

Example 1

The projection curtain comprises a PET (polyethylene terephthalate) foamed film and a matte bopp film, wherein the glossiness of the matte bopp film is 8, the light transmittance is 90%, the refractive index is 1.45, the reflectivity of the PET foamed film is more than 92%, the refractive index is 1.4, the peak brightness of the projection curtain and the brightness peak value of a white curtain with the gain of 1 are measured by a color brightness meter, the ratio of the two is calculated to be 2.4, namely the gain is 2.4, and the visual angle is measured by the color brightness meter by a 1/3 value visual angle measuring method to be about 100 degrees.

Example 2

The projection curtain comprises a PET (polyethylene terephthalate) foamed film and a matte bopp film, wherein the glossiness of the matte bopp film is 10, the light transmittance is 90%, the refractive index is 1.45, the PET foamed film is the same as that used in the embodiment 1, the peak brightness of the projection curtain and the brightness peak value of a white curtain with the gain of 1 are measured by a color brightness meter, the ratio of the peak brightness to the brightness peak value of the white curtain is 2.5, namely the gain is 2.5, and the visual angle is about 95 degrees by a 1/3 value visual angle measuring method by using a color brightness meter.

Example 3

The projection curtain comprises a PET (polyethylene terephthalate) foamed film and a matte bopp film, wherein the glossiness of the matte bopp film is 15, the light transmittance is 90%, the refractive index is 1.45, the PET foamed film is the same as that used in example 1, the peak brightness of the projection film and the brightness peak value of a white curtain with the gain of 1 are measured by a color brightness meter, the ratio of the peak brightness of the projection film to the brightness peak value of the white curtain with the gain of 1 is calculated to be 2.6, namely the gain is 2.6, and the visual angle is measured to be about 90 degrees by the color brightness meter by adopting a 1/3 value visual angle measuring method.

As can be seen from the above embodiments 1 to 3, the projection screen of the present invention has high gain (2.5 to 3) and also has a large viewing angle (90 to 100 °).

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A projection curtain comprising a reflective film and a dummy light-scattering film laminated with the reflective film;

the reflecting film is provided with a through hole and/or a bubble gap;

2. The projection curtain of claim 1, wherein the reflective film has a reflectivity of greater than 92%; the difference between the refractive index of the reflective film and the refractive index of the medium in the through hole and/or the bubble gap is 0.1 to 1.

3. The projection curtain of claim 2, wherein an area of the through holes and/or bubble gaps accounts for 30-70% of a cross-sectional area of the reflective film in a thickness direction of the reflective film, a length of the through holes and/or bubble gaps is 0.5-10 μm, and a height of the through holes and/or bubble gaps is 0.01-10 μm.

4. The projection curtain of claim 3, wherein the reflective film is a PET foamed film.

5. The projection curtain of claim 4, wherein the reflective film has a thickness of 30 μ ι η to 400 μ ι η.

6. The projection curtain of any of claims 1-5, wherein the matte light scattering film is a polymer film with matte particles embedded therein;

or the matte light scattering film is a polymer film with a concave-convex structure on the surface.

7. The projection curtain of claim 6, wherein the matte particles are selected from one or more of magnesium oxide, yttrium oxide, zinc sulfide, zinc selenide, gallium arsenide, magnesium fluoride, calcium fluoride, aluminum oxide, silicon oxide, titanium oxide, and niobium oxide;

the refractive index of the dummy light scattering film is 1.4 to 1.6.

8. The projection curtain of claim 7, wherein the polymer film is a CPP film or a BOPP film.

9. The projection curtain of claim 8, wherein the dummy light scattering film has a thickness of 1 μ ι η to 100 μ ι η.

10. The projection curtain of claim 1, further comprising a substrate disposed on a side of the reflective film facing away from the dummy light scattering film.