CN215932359U

CN215932359U - Curved surface screen suitable for ultra-short-focus laser projection

Info

Publication number: CN215932359U
Application number: CN202122415958.5U
Authority: CN
Inventors: 张兵; 赵海龙; 李志翔; 岳定飞; 王红
Original assignee: Sichuan Changhong Electric Co Ltd
Current assignee: Sichuan Changhong Electric Co Ltd
Priority date: 2021-10-08
Filing date: 2021-10-08
Publication date: 2022-03-01
Anticipated expiration: 2031-10-08

Abstract

The utility model discloses a curved screen suitable for ultrashort focal laser projection, which comprises: the Fresnel optical film comprises a curved surface supporting layer, a connecting layer and a Fresnel optical film; the inner diameter surface of the curved surface supporting layer is a connecting surface, the connecting layer is arranged between the connecting surface and the Fresnel membrane, and the Fresnel optical membrane is of a single-layer base material membrane structure. The problem that the Fresnel screen is inherently insufficient (the left and right dark areas) is solved, and the habit of eyes is also fitted; the Fresnel screen gain is improved, the left and right visual angles of the screen and the brightness uniformity of the whole Fresnel screen are increased, and the visual angle enjoyment of consumers is further improved.

Description

Curved surface screen suitable for ultra-short-focus laser projection

Technical Field

The utility model relates to the field of projection, in particular to a curved screen suitable for ultrashort-focus laser projection.

Background

Recently, with the rapid research and development and industrialization of laser televisions by domestic large-scale manufacturers such as the West China, the Changhong, the light peak and the like, the laser televisions have crossed the liquid crystal display televisions to become fourth generation novel displays; the laser television is favored by people due to the ultra-short-focus laser television with super-large size, triple eye protection and high color gamut, and is particularly suitable for a plurality of fields such as home laser cinema, games and the like. The oversized screen as an important component of the ultra-short-focus laser television becomes the focus of research and development of technicians at home and abroad.

At present, the high-gain light-resistant screen suitable for the laser television at home and abroad is mainly a Fresnel screen; fresnel screen has the hi-lite, and color reduction nature is good, but the visual angle is narrow and luminance homogeneity is poor, especially can both obviously feel the dark space at Fresnel screen edge for consumer experiences the visual angle and the luminance homogeneity of whole screen and feels poor and Fresnel screen most all is the form that the flat screen exists, and it is narrow to highlight Fresnel screen visual angle more, and luminance homogeneity is poor. Therefore, the utility model provides the curved screen suitable for ultra-short-focus laser projection, changes the distribution of the internal optical structure of the Fresnel screen, and meets the visual angle feast of people to a laser cinema, wherein the curvature of the projection screen directly influences the image quality and the scene feeling of the curved display screen.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a curved screen suitable for ultrashort-focus laser projection. So as to solve the technical problems existing in the background technology.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a curved screen suitable for ultra-short focal laser projection, comprising: the Fresnel optical film comprises a curved surface supporting layer, a connecting layer and a Fresnel optical film; the inner diameter surface of the curved surface supporting layer is a connecting surface, the connecting layer is arranged between the connecting surface and the Fresnel membrane, and the Fresnel optical membrane is of a single-layer base material membrane structure.

In some embodiments, the fresnel membrane includes a reflective layer, a fresnel optical structure layer coated with a colored diffusion material, and a substrate layer, which are sequentially disposed, and the connection layer is disposed between the connection surface and the reflective layer of the fresnel membrane.

In some embodiments, the curvature of the curved support layer is 2800R-4000R.

In some embodiments, the connecting layer is an organic glue or a substrate-free tape. The organic glue has good leveling property and high viscosity; the substrate-free adhesive tape has high viscosity.

In some embodiments, the fresnel optical structure layer coated with the coloring diffusion material has a zigzag structure with an inclined surface and a horizontal surface, the reflecting layer is disposed on the inclined surface, and the horizontal surface is provided with a light absorbing layer.

Drawings

Fig. 1 is a schematic diagram of a curved surface screen structure suitable for ultrashort-focus laser projection according to this embodiment;

the labels in the figure are: 2-a substrate layer, 3-a coloring diffusion material, 4-a light absorption layer, 5-a Fresnel optical structure layer, 6-a reflection layer, 7-a connecting layer, 8-a curved surface supporting layer and 9-a laser projector.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

On the contrary, this application is intended to cover any alternatives, modifications, equivalents, and alternatives that may be included within the spirit and scope of the application as defined by the appended claims. Furthermore, in the following detailed description of the present application, certain specific details are set forth in order to provide a better understanding of the present application. It will be apparent to one skilled in the art that the present application may be practiced without these specific details.

The curved screen suitable for ultra-short-focus laser projection according to the embodiment of the present application will be described in detail below with reference to fig. 1. It is to be noted that the following examples are only for explaining the present application and do not constitute a limitation to the present application.

In the embodiment of the present application, as shown in fig. 1, the curved screen suitable for ultrashort focal laser projection includes: the Fresnel lens comprises a curved surface supporting layer 8, a connecting layer 7 and a Fresnel optical membrane; the outer diameter surface of the curved surface supporting layer 8 is coated with a black layer, the inner diameter surface of the curved surface supporting layer 8 is a connecting surface, the connecting layer 7 is arranged between the connecting surface and the Fresnel membrane, and the Fresnel optical membrane is of a single-layer substrate membrane structure. The curved supporting layer 8 is made of a light metal material or a high polymer material, and the material has certain rigidity and curvature of 2800R-4000R. Can effectively solve fresnel structure both sides dark space, preferred 3200R's camber can not only agree with projector optical parameter, has solved fresnel screen and has controlled dark space problem, also laminates the people's eye custom moreover.

The curvature refers to the bending degree of the screen in a certain direction, determines the visual effect and the picture coverage range of a curved display screen, and is the rotation rate of the tangent direction angle of a certain point on a curve to the arc length, namely the radius value of the curved screen, and the smaller the curvature value is, the larger the bending amplitude is. By continuously optimizing the curvature of the long edge of the Fresnel screen and combining the design principle of the Fresnel membrane, the screen gain is improved, the brightness uniformity of the Fresnel screen is increased, the visual angle feeling of a film viewer is improved, and the method is low in cost, simple and easy to implement.

One surface of the substrate layer 2 is subjected to nanoscale surface treatment; the phenomenon of light overflow at the top of the curved surface screen of the ultra-short-focus laser projection can be reduced. The surface nano layer of the single-layer base material layer 2 controls the top light overflowing phenomenon of the Fresnel by changing the surface roughness of the base material, the thickness of the nano layer is within the range of 10 nanometers to 100 nanometers, and the surface roughness Rq is within the range of 10 nanometers to 80 nanometers. The substrate layer 2 is made of a high-transmittance organic polymer material, and the thickness of the substrate layer is in the range of 0.05 micrometers to 0.5 millimeters, such as PC, PET, PMMA and the like, and preferably 0.15 millimeter PET. The reflecting layer 6 is made of a high-reflectivity metal material or an oxide material, and the reflecting layer 6 is prepared by using an evaporation process or a magnetron sputtering process. The thickness is in the range of 0.01 micron to 0.06 mm, wherein the metal material can be aluminum, silver, copper or composite titanium oxide, and the metal silver is preferred.

In some embodiments, the fresnel membrane comprises a reflective layer 6, a fresnel optical structure layer 5 coated with a colored diffusing material 3, and a substrate layer 2, which are sequentially disposed, and the connecting layer 7 is disposed between the connecting surface and the reflective layer 6 of the fresnel membrane. The reflecting layer 6 and the blackened layer form a plurality of included angles theta, the included angles theta gradually change along one direction and gradually increase from bottom to top, and light rays can be directionally reflected in parallel or approximately in parallel to enter human eyes.

In some embodiments, the connecting layer 7 is an organic glue or a substrate-free tape. The organic glue has good leveling property and high viscosity; the substrate-free adhesive tape has high viscosity. The connecting layer 7 is organic polymer colloid, and can be high-viscosity adhesive tape or glue, such as acrylic acid series adhesive tape and pressure-sensitive series glue, preferably pressure-sensitive series glue.

In some embodiments, the fresnel optical structure layer 5 coated with the colored diffusing material 3 is a saw-tooth structure with a slant surface and a horizontal surface, and the reflective layer 6 is disposed on the slant surface and the horizontal surface is provided with the light absorbing layer 4. The light absorption layer 4 absorbs three-side ambient light, and black spraying treatment is performed on the top of each optical structure in a spraying mode. The Fresnel optical structure layer 5 is prepared from a high-transmittance organic polymer material, the higher the transmittance is, the better the transmittance is, the Fresnel optical structure layer can be in a sawtooth shape or a circular arc shape, and a sawtooth mechanism is preferred. The optical structure pitch D is controlled to be 0.05 mm to 0.15 mm.

The beneficial effects that may be brought by the application of the ultra-short focus laser projection curved screen include but are not limited to:

according to the utility model, the optical path of the host machine is optimized and the optical structure distribution in the Fresnel membrane is changed according to the integral optical design of the laser projection host machine and the curved surface screen, and the optical Fresnel screen has a certain curvature in the long edge direction, so that the problem of inherent deficiency (left and right dark areas) of the Fresnel screen is solved, the gain of the Fresnel screen is improved, the left and right visual angles of the screen and the brightness uniformity of the whole Fresnel screen are increased, and the visual angle enjoyment of consumers is improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A curved screen suitable for ultrashort-focus laser projection, comprising: the Fresnel optical film comprises a curved surface supporting layer, a connecting layer and a Fresnel optical film; the inner diameter surface of the curved surface supporting layer is a connecting surface, the connecting layer is arranged between the connecting surface and the Fresnel membrane, and the Fresnel optical membrane is of a single-layer base material membrane structure.

2. The curved screen for ultrashort-focus laser projection of claim 1, wherein the fresnel membrane comprises a reflective layer, a fresnel optical structure layer coated with a coloring diffusion material, and a substrate layer, which are sequentially disposed, and the connection layer is disposed between the connection surface and the reflective layer of the fresnel membrane.

3. The curved screen for ultra-short focus laser projection of claim 1, wherein the curvature of the curved support layer is 2800R-4000R.

4. The curved screen for ultrashort-focus laser projection of claim 1, wherein the connection layer is organic glue or substrate-free adhesive tape.

5. The curved screen for ultra-short focus laser projection as claimed in claim 2, wherein the fresnel optical structure layer coated with the coloring diffusion material is a sawtooth structure with an inclined plane and a horizontal plane, the reflective layer is disposed on the inclined plane, and the horizontal plane is disposed with a light absorbing layer.