CN110780528A

CN110780528A - Novel short-focus anti-ambient light gain projection curtain

Info

Publication number: CN110780528A
Application number: CN201810833166.XA
Authority: CN
Inventors: 马瑞祥; 苗永平; 刘维慧
Original assignee: Shandong University of Science and Technology
Current assignee: Shandong University of Science and Technology
Priority date: 2018-07-26
Filing date: 2018-07-26
Publication date: 2020-02-11

Abstract

The invention relates to an ultra-short-focus projection curtain, which mainly comprises a bottom layer, a middle layer and a surface layer which are sequentially attached from back to front; the bottom layer comprises a light absorption layer and a reflection layer, the front surface of the light absorption layer extends forwards to form a structure that a plurality of strip-shaped tooth edges with approximately concave triangular cross sections are sequentially connected and arranged in parallel, the strip-shaped tooth edges extend along the horizontal direction, the concave radian at the lower side of each tooth edge is sequentially reduced from the top end of the curtain to the middle until the radian is 180 degrees, and the reflection layer is a thin film and is tightly attached to the lower side surface of each strip-shaped tooth edge; the middle layer comprises a lens layer, and the lens layer is formed by connecting and arranging a plurality of plano-concave lenses in parallel; the surface layer comprises a diffusion layer and a scratch-resistant coating, the surface of the diffusion layer is composed of a plurality of microparticle bulges, the surface of the diffusion layer is also provided with the scratch-resistant coating, and the scratch-resistant coating is attached to the microparticle bulges on the surface of the diffusion layer, so that the surface protection effect is achieved. The ultra-short-focus projection curtain disclosed by the invention can realize short-distance projection, can realize a wide visual angle while keeping high gain, has the advantages of light resistance, scratch resistance and glare resistance on the surface of the curtain, is convenient to scrub and clean, and has extremely high application value.

Description

Novel short-focus anti-ambient light gain projection curtain

Technical Field

The invention relates to the field of projection, in particular to ultra-short focus projection.

Background

Projection screens are widely used in daily life, and are often used in commercial advertisements, homes or offices and other places. However, the traditional projection screen is easy to cause unclear display under the interference of sunlight and light, and can only be used in a dark environment, so that the use occasion is greatly limited. In reality, a projection screen is easy to cause low display color brightness and low saturation under the interference of ambient light, and a traditional projector needs to be placed at a far place of the projection screen, so that certain requirements are imposed on a use space. The product in the market widely has the contradiction problem of visual angle and high gain, and the screen visual angle can be influenced while the high gain is met. In addition, the existing curtain in the market is mostly made of PPU (polypropylene thermoplastic elastomer) materials, and the curling degree is not good enough and the occupied space is large.

Disclosure of Invention

In order to solve the above problems, an object of the present invention is to provide an ultra-short-focus projection curtain, which comprises a bottom layer, a middle layer and a surface layer sequentially attached from back to front; the bottom layer comprises a light absorption layer and a reflection layer, the front surface of the light absorption layer is formed by sequentially connecting and parallelly arranging a plurality of strip-shaped tooth edges with the sections similar to concave triangles, the strip-shaped tooth edges extend along the horizontal direction, the concave radian of the lower side surfaces of the tooth edges is sequentially reduced from the top end to the middle of the screen along the vertical direction of the screen until the radian is 180 degrees, and the reflection layer is a film and is tightly attached to the lower surfaces of the strip-shaped tooth edges; the middle layer comprises a lens layer, the lens layer is formed by connecting and arranging a plurality of plano-concave lenses in parallel, the plane of the plano-concave lens faces forwards, the inner concave surface faces backwards and extends along the vertical direction, and the rear surface of the lens layer is attached to the front surface of the bottom layer; the surface layer comprises a diffusion layer, the front surface of the diffusion layer is a rough surface formed by a plurality of microparticle-shaped bulges, and the surface of the diffusion layer is also provided with a scratch-resistant coating which is attached to the microparticle-shaped bulges on the surface of the diffusion layer.

Further, the bottom layer comprises a first substrate layer light absorption layer and a reflection layer from back to front in sequence, and the rear surface of the middle layer is attached to the front surface of the bottom layer.

Preferably, the middle layer comprises a second base layer and a lens layer from back to front in sequence, the rear surface of the lens is attached to the front surface of the second base layer, the rear surface of the second base layer is adhered to the bottom layer, and the lens layer is attached to the front surface of the second base layer.

Furthermore, the top layer sequentially comprises a third base material layer, a second colloid layer and a diffusion layer from back to front, the rear surface of the diffusion layer is attached to the front surface of the third base material layer, and the rear surface of the third base material layer is bonded with the front surface of the second middle layer.

Preferably, the edge surface of each strip-shaped tooth edge is formed by connecting two inclined side surfaces, wherein the inclined surface at the lower side is designed to be concave, and the reflecting layer is arranged on the surface of the arc-shaped concave side.

Further, the concave radian of the lower side surface of the tooth edge is reduced from the top end of the screen to the middle of the screen in the vertical direction of the screen in sequence until the radian is 180 degrees.

Further, the ranges of the angles a1, a2, A3 are not less than 25 ° and not more than 40 ° as shown in fig. 4.

Preferably, the front surface of one side of the concavity is a rough surface made up of a multitude of micro-particulate protrusions, the distance between the peaks of any two of which is less than 10 μm.

Preferably, the distance between the peaks of any two micro-particulate protrusions is less than 10 μm.

Further, the vertical pitch of any two strip-shaped tooth edges is less than 100 μm.

Preferably, the front surface of the diffusion layer is a rough surface formed by a plurality of micro-particle-shaped protrusions, and the surface of the diffusion layer is further provided with a scratch-resistant coating which is attached to the micro-particle-shaped protrusions on the surface of the diffusion layer.

Preferably, the first base material layer, the second base material layer and the third base material layer are made of PET materials.

In summary, the short-focus projection curtain disclosed by the invention can obtain a larger viewing angle range while realizing short-focus projection, can avoid the interference of external light, and can achieve high gain, thereby obtaining a good visual effect. In order to make the aforementioned and other objects of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic perspective view of an ultra-short focus projection curtain according to the present invention.

Fig. 2 is a side view of the overall structure of an ultra-short focus projection curtain of the present invention.

Fig. 3 is a top view of the overall structure of the ultra-short focus projection curtain of the present invention.

Fig. 4 is a light reflection diagram of the reflective layer of the ultra-short focus projection curtain of the present invention.

Fig. 5 is a schematic diagram of an overall structure of the ultra-short focus projection system of the present invention.

Reference numbers of the drawings: an ultra-short focus projection curtain 100.

The first base material layer 11 of the bottom layer 1 and the light absorbing layer 12 reflect the light absorbing surface 13 on the stripe-shaped tooth 1a of the reflecting layer 14.

The intermediate layer 2, the second base material layer 21, the first colloid layer 22, the plano-concave lens layer 23, and the plano-concave lens 2 a.

Top sheet 3 third base material layer 31 second colloid layer 32 diffusion layer 33 fine particle shaped protrusions 3a scratch resistant coating 3 b.

A projector 200.

Detailed Description

The embodiment discloses an ultra-short-focus projection curtain, which comprises a bottom layer 1, a middle layer 2 and a surface layer 3 which are sequentially attached from back to front; the bottom layer 1 comprises a first substrate layer 11, a light absorption layer 12 and a reflection layer 14, the front surface of the light absorption layer is formed by sequentially connecting and parallelly arranging a plurality of strip-shaped tooth edges 1a with approximately concave triangular sections, the strip-shaped tooth edges 1a extend along the oblique horizontal direction, and the reflection layer 14 is a thin film and is tightly attached to the lower edge surface of the strip-shaped tooth edges 1 a; the middle layer 2 comprises a second substrate layer 21 and a lens layer 23, the front surface of the lens layer 23 is formed by connecting and arranging a plurality of plano-concave lenses 2a in parallel, the plane of the plano-concave lens 2a faces forwards, the concave surface faces backwards and extends along the vertical direction; the top sheet 3 includes a third base material layer 31 and a diffusion layer 33, the front surface of the diffusion layer is a rough surface formed by a plurality of fine-particle-shaped protrusions 3a, and the front surface of the third base material layer is bonded to the rear surface of the diffusion layer.

More specifically, as shown in fig. 1, the base layer 1 includes a first base material layer 11, a light absorbing layer 12, and a reflecting layer 14 in this order from back to front, and the reflecting layer 14 is attached to the concave surface on the lower side of the light absorbing tip 1 a. Preferably, the intermediate layer 2 includes a second substrate layer 21, a first colloid layer 22, and a lens layer 23 in this order from back to front, the rear surface of the lens layer 23 is bonded to the front surface of the second substrate layer 21 via the first colloid layer 22, and the rear surface of the second substrate layer 21 is bonded to the base layer 1. Further, the top sheet 3 includes a third base material layer 31, a second colloid layer 32, and a diffusion layer 33 in this order from back to front, the rear surface of the diffusion layer 33 is bonded to the front surface of the third base material layer 31, the third base material layer 31 is bonded to the front surface of the intermediate layer 2, the front surface of the diffusion layer is a rough surface constituted by a plurality of fine particle-shaped protrusions 3a, and the surface of the diffusion layer is coated with a scratch-resistant coating layer 3b to adhere to the surfaces of the fine particle protrusions.

In the ultra-short-focus projection curtain 100 provided by the first embodiment of the present invention, the bottom layer 1 includes the light-absorbing layer 12 disposed on the first substrate layer 11, and the light-absorbing layer 12 can be used as a light-shielding surface to prevent light from passing through the bottom surface of the curtain, and can also prevent light from passing through the back surface of the ultra-short-focus projection curtain 100.

In this embodiment, as shown in fig. 2, the light absorbing layer 12 extends forward to form a plurality of strip-shaped tips 1a with approximately concave triangular cross sections, which are arranged in parallel in the vertical direction, each strip-shaped tip 1a extends in the horizontal direction, a reflective layer is disposed on the lower surface of the tip 1a, and the reflective layer 14 is made of a thin film material and is tightly attached to the lower surface of the tip 1a, and has a reflective effect on incident light. Specifically, the tooth 1a is formed by arranging a plurality of strip-shaped tips in parallel in a vertical direction so that the cross section of the plurality of strip-shaped tips is zigzag, each tooth is formed by connecting two inclined side surfaces, one of which is an inclined surface and the other is an inner concave surface, and the reflecting layer 14 is provided on one side surface of the inner concave surface to serve as a back reflecting surface for receiving projection light. The ridge distance in the vertical direction of any two strip-shaped ridges is less than 100 microns, and the ridge distance refers to the distance between the ridge top of each strip-shaped ridge formed by the joint of two inclined side faces of each strip-shaped ridge and the ridge top of the adjacent strip-shaped ridge.

More specifically, the underside of the tooth edge is a rough surface formed by a plurality of micro-particle-like protrusions, and the micro-particle-like protrusions can diffuse incident light entering the side surface in all directions at the same time, so that the range of the visual angle of the emergent light is further expanded. Wherein the distance between the peaks of any two of the microparticulate projections is less than 10 μm.

Further, the upper side surface of each strip-shaped tooth 1a can absorb the interference light such as sunlight and light incident opposite to the surface thereof, for example, in fig. 1, the upper side surface of each strip-shaped tooth is made of a light absorbing material to absorb the external ambient light such as sunlight and light incident from above, so as to avoid the interference of such external ambient light, so that the ultra-short-focus projection curtain 100 provided by this embodiment can be applied to the occasions with the external ambient light, and is not applied to the dark background without the external ambient light like the conventional projection curtain.

In this embodiment, as shown in fig. 3, the lens layer 23 is formed by a plurality of plano-concave lenses 2a arranged in parallel in the horizontal direction, each plano-concave lens 2a extends in the vertical direction, the third substrate layer 31 is attached to the front surface of the plano-concave lens 2a of the lens layer 23, the inner concave surfaces of the plano-concave lenses face backward and are arranged in parallel in the horizontal direction, so that a plurality of plano-concave lenses are arranged in each height level to refract the angle of the outgoing light in the horizontal direction, and the outgoing angle of the light emitted in the horizontal direction by being reflected by the prism layer and the reflection layer is enlarged, thereby enlarging the horizontal viewing angle range of the ultra-short focus projection curtain 100 provided in this embodiment.

In this embodiment, as shown in fig. 4, the dotted lines L1, L2, and L3 are bisectors of the reflection angles B1, B2, and B3, respectively, the dotted lines P1, P2, and P3 pass through the light reflection point and are perpendicular to the lines L1, L2, and L3, respectively, the included angles formed by the lines P1, P2, and P3 and the vertical direction are a1, a2, and A3, respectively, and the angles a1, a2, and A3 decrease sequentially, that is, it indicates that the concave radian of the lower side of the tooth ridge decreases sequentially from the top end of the curtain to the middle until the radian is 180 °.

In the ultra-short-focus projection curtain 100 of the present embodiment, the fine-particle-shaped protrusions 3a are distributed on the surface of the diffusion layer 33. The surface of the microparticle-shaped protrusion 3a on the surface of the diffusion layer 33 may be irregular spherical protrusions, so that the surface of the first diffusion layer 41 is a rough uneven surface, and can perform a certain degree of diffuse reflection on incident light, so that the diffusion layer 33 has an anti-glare effect; more specifically, the micro-particle-shaped protrusions 3a on the surface of the diffusion layer 33 refract ambient light such as sunlight and light incident from an oblique upper side, so that the ambient light is emitted from a lower side, and the ambient light such as sunlight and light is difficult to be reflected to human eyes by the projection curtain, so that the light-resistant effect can be achieved, and the interference of external ambient light is avoided; the fine particle-like protrusions 3a can diffuse incident light beams incident on the side surfaces in all directions at the same time, thereby further widening the range of viewing angles of the outgoing light beams. Here, the distance between the peaks of any two of the microparticulate projections is less than 10 μm.

Furthermore, the surface of the diffusion layer 33 is further provided with a scratch-resistant coating 3b, and the scratch-resistant coating 3b is attached to the micro-particle-shaped protrusions 3a on the surface of the diffusion layer 33, so that the diffusion layer 33 can protect the surface of the ultra-short focus projection screen 100, and the surface of the ultra-short focus projection screen can be cleaned and scrubbed after being used without damaging the screen.

The working principle of the ultra-short-focus projection curtain 100 according to the first embodiment of the present invention is described in detail below with reference to fig. 1 to 4:

as shown in fig. 1, when light from the projector enters the projection screen from an oblique lower side, the diffusion layer 33 first absorbs the interfering external light, and the incident light enters the lens layer 23 after being slightly refracted by the third substrate layer 31 and the second colloid layer 32, and is first turned by the refraction of the lens layer 23.

Then, the incident light reaches the reflecting layer 14 through the second base material layer 21 and the first colloid layer 22, and since the reflecting layer 14 is closely attached to the concave surface on the lower side of the light absorbing layer tooth edge 1a, the incident light is reflected through the reflecting surface 14, so that the angle of the incident light from the oblique lower side is changed in the vertical direction, and the incident light is turned for the second time, and the emergent light emitted in the oblique lower direction and the parallel direction is formed.

Then, the emergent light reaches the lens layer 23 through the first colloid layer 22 and the second substrate layer 21 again, and is subjected to third steering under the refraction effect of the lens layer 23, the angle is further changed in the horizontal direction, and the emergent light is emitted in a wider angle direction, so that the emergent angle of the light is enlarged.

After the emergent light reaches the diffusion layer 33 through the second colloid layer 32 and the third substrate layer 31 again, because numerous micro-particle-shaped protrusions are arranged on the surface of the diffusion layer 33, the emergent light changes the emergent angle in the horizontal direction and the vertical direction, and the visual angle range of the projection curtain is further expanded.

Because diffusion layer 33 surface is provided with anti blade coating 3b, the ultrashort burnt projection curtain 100 that this embodiment provided not only can realize the projection of ultrashort burnt, satisfies the interference of avoiding external environment light moreover, satisfies anti scraping, prevent dazzling, the needs of high contrast, has broad visual angle simultaneously, has fine visual effect.

It should be noted that, as shown in fig. 2 and fig. 3, in the present embodiment, the plano-concave lens 2a of the lens layer 23 extends along the vertical direction, and the strip-shaped tooth ridges 1a extending from the light absorbing layer extend along the horizontal direction, so that the incident light is refracted in the horizontal direction through the first turning of the lens layer 23, and is reflected in the vertical direction through the second turning of the reflective layer 14, so that the incident light is converted into the emergent light, and is refracted in the horizontal direction through the third turning of the lens layer 23; in addition, since the micro-particle protrusions on the surface of the diffusion layer 33 are irregular spherical protrusions, when the incident light and the emergent light pass through the diffusion layer 33, the incident light and the emergent light can be diffused in the horizontal direction and the vertical direction at the same time, so that the viewing angle of the ultra-short-focus projection curtain 100 of the embodiment is enlarged. Furthermore, since the micro-particle-shaped protrusions are also disposed on the lower side surface of the tooth 1a, when the light is reflected on the reflective layer 14 on the lower surface of the tooth 1a, the light can be diffused in both the horizontal direction and the vertical direction, so that the viewing angle of the ultra-short-focus projection curtain 100 provided by this embodiment can be further enlarged.

Preferably, the first substrate layer 11, the second substrate layer 21, and the third substrate layer 31 in this embodiment are made of a PET material, and the PET material has good physical and mechanical properties, and is easy to recover after being rolled up, so that the flatness of the ultra-short-focus projection curtain provided in this embodiment can be maintained, and the ultra-short-focus projection curtain provided in this embodiment is not deformed due to rolling up and unrolling for multiple times, and can be applied to multiple occasions, thereby further improving the commercial value of the ultra-short-focus projection curtain provided in this embodiment.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description.

Claims

1. A novel ultra-short-focus projection curtain is characterized by comprising a bottom layer, a middle layer and a surface layer which are sequentially attached from back to front; the bottom layer comprises a light absorbing layer and a reflecting layer, the rear surface of the light absorbing layer is a plane and is attached to the first substrate layer, the front surface of the light absorbing layer extends forwards to form a plurality of strip-shaped tooth edges with approximately concave triangular sections, the strip-shaped tooth edges are sequentially connected and arranged in parallel, the strip-shaped tooth edges extend along the horizontal direction, the concave radian of the concave triangle is sequentially reduced from the top end to the middle of the curtain until the radian is 180 degrees, and the reflecting layer is a thin film and is tightly attached to the lower edge surface of the strip-shaped tooth edges; the middle layer comprises a second substrate layer and a lens layer, the lens layer is formed by connecting and arranging a plurality of plano-concave lenses in parallel, the concave surfaces of the plano-concave lenses face backwards, the plane faces forwards, and the plano-concave lenses extend in the vertical direction; the surface layer comprises a third base material layer and a diffusion layer, the front surface of the diffusion layer is a rough surface formed by a plurality of microparticle-shaped bulges, the surface of the diffusion layer is also provided with a scratch-resistant coating, and the scratch-resistant coating is attached to the microparticle-shaped bulges on the surface of the second diffusion layer.

2. The ultra-short-focus projection curtain as claimed in claim 1, wherein the bottom layer comprises a first substrate layer, a light absorption layer and a reflection layer in sequence from back to front, the rear surface of the reflection layer is attached to the lower side surface of the light absorption layer, and the concave radian of the lower surface of the tooth edge is reduced in sequence from the top end of the curtain to the middle of the screen until the radian is 180 degrees.

3. The ultra-short focus projection curtain of claim 1, wherein the intermediate layer comprises a second substrate layer, a first colloid layer, and a lens layer in sequence from back to front, wherein a back surface of the lens layer is attached to a front surface of the second substrate layer, and a back surface of the second substrate layer is bonded to the bottom layer.

4. The ultra-short focus projection curtain of claim 1, wherein the surface layer comprises a third substrate layer, a second colloid layer, and the diffusion layer in sequence from back to front, wherein a rear surface of the diffusion layer is attached to a front surface of the third substrate layer, and a rear surface of the third substrate layer is attached to a front surface of the second intermediate layer.

5. The ultra-short-focus projection curtain as claimed in claim 1, wherein the edge surface of each of the strip-shaped ridges is formed by joining two inclined surfaces, wherein the lower surface is an inner concave surface, the inner concave curvature decreases from the top end of the curtain to the middle of the screen in sequence until the curvature reaches 180 degrees, and the reflective layer is disposed on the inner concave side surface.

6. The ultra-short focus projection curtain as recited in claim 5, wherein the underside surface of the cusps comprises a roughened surface with a plurality of micro-particulate protrusions.

7. The ultra-short focal curtain of claim 3, wherein the lens is a plano-concave lens with the lens plane facing forward and concave inward and facing rearward.

8. The ultra-short focus projection curtain of claim 6, wherein a distance between peaks of any two micro-granular protrusions is less than 10 μ ι η.

9. The ultra-short focus projection curtain of claim 1, wherein the perpendicular pitch of any two strip-shaped tips is less than 100 μ ι η.

10. The ultra-short focus projection curtain as recited in claim 1, wherein the surface layer comprises a diffusion layer having a front surface comprising a rough surface comprising a plurality of micro-particulate protrusions.

11. The ultra-short focus projection curtain of claim 1, wherein a front surface of the diffusion layer is coated with a scratch-resistant coating.

12. The ultra-short focus projection curtain of claim 1, wherein the first substrate layer, the second substrate layer, and the third substrate layer are all made of PET.