CN-224216902-U - Curved waveguide and display device

Abstract

The utility model discloses a curved waveguide and display equipment, wherein the curved waveguide comprises a dielectric layer, a bendable waveguide film and a second surface, the dielectric layer is provided with the first surface and the second surface, the bendable waveguide film is arranged on the first surface, the curvature of the bendable waveguide film is smaller than the preset curvature, the first surface is configured to prevent light totally reflected in the bendable waveguide film from leaking out, and the second surface is configured to be attached to the curved surface of a target object. The utility model adopts the bendable waveguide film, utilizes the dielectric layer to adapt to the bending surface of the target object to form the curved waveguide, and keeps better imaging effect.

Inventors

• ZHAO JIAQI
• SU XIAOLEI
• ZHANG XIANPENG
• LI YI

Assignees

• 深圳光峰科技股份有限公司

Dates

Publication Date

20260508

Application Date

20250616

Claims (10)

1. 1.A curved waveguide, comprising: a dielectric layer having a first surface and a second surface; a bendable waveguide film disposed on the first surface; Wherein the curvature of the bendable waveguide film is less than a preset curvature; The first surface is configured not to leak light totally reflected within the bendable waveguide film; The second surface is configured to adhere to a curved surface of the target object.
2. 2. The curved waveguide of claim 1, wherein said dielectric layer comprises, when the curvature of said curved surface is less than or equal to a preset curvature: A first optical isolation layer; Wherein the surface of the first optical isolation layer facing the bendable waveguide film is the first surface.
3. 3. The curved waveguide of claim 1, wherein said dielectric layer comprises, when the curvature of said curved surface is greater than a preset curvature: A first optical isolation layer and a curvature compensation layer are arranged in a lamination mode; wherein the surface of the first optical isolation layer facing the bendable waveguide film is the first surface; The surface of the curvature compensation layer facing the curved surface is the second surface; The curvature of the surface of the curvature compensation layer facing the first optical isolation layer is smaller than or equal to a preset curvature.
4. 4. A curved waveguide according to claim 2 or 3, wherein the refractive index of the first optical isolation layer is less than the refractive index of the bendable waveguide film.
5. 5. The curved waveguide of claim 2 or 3, wherein said first optical isolation layer comprises a plurality of first support structures, and air medium is filled between two adjacent first support structures.
6. 6. A curved waveguide according to any one of claims 1-3, wherein said curved waveguide further comprises: A protective layer having a third surface; wherein the third surface is connected to a side of the bendable waveguide film facing away from the dielectric layer; the third surface is configured not to leak light totally reflected within the bendable waveguide film.
7. 7. The curved waveguide of claim 6, wherein said protective layer comprises: laminating a second optical isolation layer and a protective film; Wherein the surface of the second optical isolation layer facing the bendable waveguide film is the third surface; The second optical isolation layer is located between the protective film and the bendable waveguide film.
8. 8. A curved waveguide according to any one of claims 1-3, wherein the roughness of said first surface is less than a predetermined roughness, and/or The bendable waveguide film is formed with a coupling-in structure and a coupling-out structure, which respectively match the curvature of corresponding positions of the curved surface, and/or The parameters of the bendable waveguide film include at least one of an optical transmittance greater than 75%, a haze less than 5%, a refractive index greater than 1.45, and a surface scattering ratio less than 5%.
9. 9. A display device comprising the curved waveguide according to any one of claims 1-8.
10. 10. The display device of claim 9, further comprising a light engine.

Description

Curved waveguide and display device Technical Field The utility model relates to the technical field of display, in particular to a curved waveguide and display equipment. Background The optical waveguide is used as a transparent display device, and the coupling-in structure is used for guiding image light to the waveguide substrate, the image light propagates through the waveguide substrate in a total reflection mode, and the light is emitted into air from the waveguide substrate when propagating to the coupling-out structure, and then is emitted into human eyes for imaging. In order to ensure that the imaging quality of the image light is consistent before and after passing through the waveguide, the existing optical waveguide substrate is almost flat plate structure. However, in transparent display application scenarios, a curved substrate or other target object is often employed. In the prior art, when the optical waveguide substrate is attached to the curved surface of the target object, the imaging effect of the optical waveguide substrate is poor. Accordingly, the prior art is still in need of improvement and development. Disclosure of utility model The utility model aims to solve the technical problems of the prior art, provides a curved waveguide and display equipment, and aims to solve the problem that the imaging effect of an optical waveguide substrate is poor when the optical waveguide substrate is attached to the curved surface of a target object in the prior art. The technical scheme adopted for solving the technical problems is as follows: A curved waveguide, wherein it comprises: a dielectric layer having a first surface and a second surface; a bendable waveguide film disposed on the first surface; Wherein the curvature of the bendable waveguide film is less than a preset curvature; The first surface is configured not to leak light totally reflected within the bendable waveguide film; The second surface is configured to adhere to a curved surface of the target object. The curved waveguide, wherein when the curvature of the curved surface is less than or equal to a preset curvature, the dielectric layer includes: A first optical isolation layer; Wherein the surface of the first optical isolation layer facing the bendable waveguide film is the first surface. The curved waveguide, wherein when the curvature of the curved surface is greater than a preset curvature, the dielectric layer includes: A first optical isolation layer and a curvature compensation layer are arranged in a lamination mode; wherein the surface of the first optical isolation layer facing the bendable waveguide film is the first surface; The surface of the curvature compensation layer facing the curved surface is the second surface; The curvature of the surface of the curvature compensation layer facing the first optical isolation layer is smaller than or equal to a preset curvature. The curved waveguide, wherein the refractive index of the first optical isolation layer is smaller than the refractive index of the bendable waveguide film. The curved waveguide comprises a plurality of first supporting structures, and air media are filled between two adjacent first supporting structures. The curved waveguide, wherein the curved waveguide further comprises: A protective layer having a third surface; wherein the third surface is connected to a side of the bendable waveguide film facing away from the dielectric layer; the third surface is configured not to leak light totally reflected within the bendable waveguide film. The curved waveguide, wherein the protective layer comprises: laminating a second optical isolation layer and a protective film; Wherein the surface of the second optical isolation layer facing the bendable waveguide film is the third surface; The second optical isolation layer is located between the protective film and the bendable waveguide film. The curved waveguide, wherein the roughness of the first surface is less than a preset roughness, and/or The bendable waveguide film is formed with a coupling-in structure and a coupling-out structure, which respectively match the curvature of corresponding positions of the curved surface, and/or The parameters of the bendable waveguide film include at least one of an optical transmittance greater than 75%, a haze less than 5%, a refractive index greater than 1.45, and a surface scattering ratio less than 5%. A display device comprising a curved waveguide as claimed in any one of the preceding claims. The display device further comprises a light machine. The application has the beneficial effects that the bendable waveguide film is adopted, the dielectric layer is used for adapting to the bending surface of the target object to form the curved waveguide, and the better imaging effect is maintained. Drawings Fig. 1 is a schematic diagram of a display apparatus and a target object in an embodiment of the present utility model. Fig. 2 is a schematic diagram of a first struc