Display lens and display equipment

Abstract

According to the display lens provided by the invention, the supporting structure is arranged on one side of the protection sheet of the display lens, and the supporting structure is limited to be at least arranged in the orthographic projection area of the grating structure on the protection sheet; the contact mode between the protection sheet and the waveguide sheets or between the waveguide sheets is changed under the condition that the protection sheet and / or the waveguide sheets are / is deformed due to pressure and the like, so that the Newton ring phenomenon is reduced, and the display effect of the existing lens is improved; in addition, the position and the structure of the supporting structure are further limited, the contact mode between the protection sheet and the waveguide sheet can be changed from different angles, the performance of the display lens is improved, and remarkable progress is achieved.

Description

Technical Field

[0001] The present invention relates to the field of optical technology, and in particular to a display lens and a display device. Background Art

[0002] Among the existing related technologies, benefiting from the development of related technologies such as AR and VR, smart glasses have gradually become popular in daily life. In order to improve the color display effect and the thinness of the equipment, the waveguide components are usually thinned or lighter materials are selected instead. This also brings other problems to the waveguide components, such as the overall strength or rigidity of the waveguide components is poor, especially if it is compressed or collided during use, it is easy to cause large-area contact and adhesion between the waveguide components and produce Newton ring phenomenon. How to avoid the occurrence of this phenomenon has become a technical pain point in the industry.

[0003] The present invention aims to solve the above technical problems and provide a new display lens to reduce the generation of Newton rings in the waveguide. Summary of the invention

[0004] The present invention provides a display lens and a display device, which are intended to solve the Newton ring phenomenon existing in the waveguide component in the prior art, thereby improving the display effect of the display lens.

[0005] The present invention seeks to protect a display lens, comprising at least one waveguide sheet and at least one protective sheet, wherein the waveguide sheet and the protective sheet are stacked, a grating structure is arranged on a surface of the waveguide sheet facing the protective sheet, the grating structure comprises an in-coupling grating and an out-coupling grating, a supporting structure is arranged on a surface of the protective sheet facing the grating structure, the supporting structure is arranged at least within the orthographic projection area of ​​the grating structure on the protective sheet, a surface of the supporting structure close to the waveguide sheet is a non-smooth surface, and the supporting structure is configured not to affect the optical path of the waveguide sheet.

[0006] Further, practicably, the support structure is disposed within an orthographic projection region of the grating structure on the protection sheet and extends outside the orthographic projection region.

[0007] Furthermore, the support structure includes curing glue and particles filled in the curing glue, and the particle size of the particles is larger than the height of the curing layer formed after the curing glue is cured.

[0008] Furthermore, the particle size of the particles within the orthographic projection area is the same as or different from the particle size of the particles outside the orthographic projection area.

[0009] In practice, the particle size of the particles in the orthographic projection area is different from the particle size of the particles in the connecting light path projection area, and the connecting light path projection area is defined as the orthographic projection of the area of ​​the light path connected by the positions of the coupling-in grating and the coupling-out grating on the protective sheet.

[0010] Furthermore, the supporting structure includes a plurality of supporting units.

[0011] Furthermore, the heights of the plurality of support units are the same or different within the orthographic projection area and outside the orthographic projection area.

[0012] Optionally, the height of the support unit in the orthographic projection area is different from the height of the support unit in the connecting light path projection area, and the connecting light path projection area is defined as the orthographic projection of the area of ​​the light path connected to the positions of the coupling-in grating and the coupling-out grating on the protective sheet.

[0013] In practice, the support structure includes a curing glue and particles filled in the curing glue, and the particle size of the particles is greater than 2 μm; further, the particle size of the particles can be limited to be smaller than the gap distance when the waveguide plate and the protective plate are connected.

[0014] Furthermore, optionally, the particle size of the microparticles is larger than the height of the cured adhesive after curing.

[0015] Furthermore, the invention comprises at least two layers of waveguide plates and at least one layer of protective plate, wherein the waveguide plates and the protective plate are stacked, a grating structure is arranged on one side surface of each waveguide plate, the supporting structure is arranged on one side surface of the protective plate facing the grating structure, and the supporting structure is arranged on one side surface of a middle waveguide plate facing another waveguide plate, and the supporting structure is arranged at least within the positive projection area of ​​the grating structure of the waveguide plate within the protective plate.

[0016] The waveguide sheet may be a resin sheet or a glass sheet; the protection sheet may be a resin sheet or a glass sheet.

[0017] At the same time, the present invention seeks protection for a display device, which includes the display lens described in any one of the above items.

[0018] Furthermore, the display device includes AR glasses or HUD, etc.

[0019] The present invention claims protection for a method for manufacturing a display lens, wherein the display lens comprises at least one waveguide sheet and at least one protective sheet, wherein the waveguide sheet and the protective sheet are stacked; the method comprises the following steps:

[0020] S1: Arranging a grating structure on the surface of the waveguide plate facing the protective plate, wherein the grating structure comprises an in-coupling grating and an out-coupling grating;

[0021] S2: a support structure is arranged on the surface of the protection sheet facing the grating structure; the support structure is arranged at least within the orthographic projection area of ​​the grating structure on the protection sheet; and the surface of the support structure close to the waveguide sheet is a non-smooth surface;

[0022] S3: Connecting the waveguide plate and the protection plate through a connecting member.

[0023] In step S2, providing a support structure on a surface of the protection sheet facing the grating structure specifically includes forming the support structure on the protection sheet by mold forming, printing, etching, nano-imprinting or inkjet printing technology.

[0024] In practice, the support structure includes a plurality of support units, and a tooth width of the support unit is more than 10 times greater than a tooth width of each grating unit.

[0025] Furthermore, the tooth width of each of the plurality of support units is 2 μm to 150 μm.

[0026] Further, the tooth width of each of the plurality of support units is defined as 50 μm to 120 μm.

[0027] Furthermore, the height of each of the plurality of support units is 1 μm to 0.2 mm.

[0028] Furthermore, the spacing between different support units among the plurality of support units is controlled to be within the range of 0.2 mm to 20 mm.

[0029] According to the display lens provided by the present invention, a supporting structure is arranged on one side of the protective sheet of the display lens, and the supporting structure is limited to be arranged at least in the positive projection area of ​​the grating structure on the protective sheet, and the surface of the supporting structure close to the waveguide sheet is arranged as a non-smooth surface, so that when the protective sheet and / or the waveguide sheet is deformed by pressure or the like, the contact mode between the protective sheet and the waveguide sheet or between the waveguide sheets is changed, thereby avoiding large-area contact adhesion between the sheets and reducing the possibility of Newton ring phenomenon. In addition, the contact mode between the sheets in the present application is also conducive to restoring deformation, avoiding long-term adhesion, further reducing the possibility of Newton ring phenomenon, improving the display effect in the existing lens, and having unexpected technical effects; optionally, the present invention also further limits the position and structure of the supporting structure, can change the contact mode between the sheets from different angles, improve the deformation recovery ability, and improve the performance of the display lens, which is a significant improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 A top view of the structure of a display lens in an embodiment provided by the present invention;

[0032] Figure 2 A schematic structural diagram of a display lens in another embodiment provided by the present invention;

[0033] Figure 3 A schematic structural diagram of a display lens in another embodiment provided by the present invention;

[0034] Figure 4 A schematic structural diagram of a display lens in another embodiment provided by the present invention;

[0035] Figure 5 A schematic structural diagram of a display lens in another embodiment provided by the present invention;

[0036] Figure 6 A top view of a display lens in another embodiment provided by the present invention;

[0037] Figure 7 A schematic structural diagram of a display lens in another embodiment provided by the present invention;

[0038] Figure 8 A schematic structural diagram of a display lens in another embodiment provided by the present invention;

[0039] Fig. 9 A schematic structural diagram of a display lens in another embodiment provided by the present invention;

[0040] Fig.10 A schematic structural diagram of a display lens in another embodiment provided by the present invention;

[0041] Fig.11 A schematic structural diagram of a display lens in another embodiment provided by the present invention;

[0042] Fig.12 A schematic flow chart of a method for manufacturing a display lens provided by the present invention;

[0043] Figure ID:

[0044] Display lens: 100; protective sheet: 110; connector: 120; waveguide: 130; out-coupling grating: 140; in-coupling grating: 150; support structure: 210; grating structure projection area: 310; connecting light path projection area: 320 DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0046] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0047] The present invention provides a display lens, referring to Figure 1-10 The display lens comprises at least one waveguide sheet 130 and at least one protective sheet 110. The waveguide sheet 130 and the protective sheet 110 are stacked and connected via a connector 120. A grating structure is arranged on a surface of the waveguide sheet 130 facing the protective sheet 110. The grating structure comprises an in-coupling grating 150 and an out-coupling grating 140. A support structure 210 is arranged on a surface of the protective sheet 110 facing the waveguide sheet 130. The support structure 210 is at least arranged in the orthographic projection area of ​​the grating structure on the protective sheet 110. Figure 2-5 As shown in FIGS. 7-10 , a support structure is provided at least directly above the grating structure. Meanwhile, the surface of the support structure 210 close to the waveguide plate 130 is a non-smooth surface and is configured not to affect the light path in the waveguide plate, and thus not to change the propagation path of the light.

[0048] It should be noted that the definition of not affecting the optical path in the waveguide as defined in this application means not bringing adverse effects to the original coupling, transmission, and coupling-out optical paths in the waveguide, thereby producing results worse than the original performance. However, support structures that can bring favorable effects also fall within the scope of protection of this application.

[0049] The surface of the support structure close to the waveguide is a non-smooth surface, which means that after the support structure is arranged on the protective sheet, the surface of the overall structure formed by the support structure and the protective sheet facing the waveguide is not a plane and includes a number of randomly dispersed or regularly distributed protrusions, the protrusions are in contact with the waveguide, and the size of the protrusions in at least one direction is about 5-1000 times the grating period, so as not to damage the grating structure, and not to form a large-area contact with the waveguide. In other words, the non-smooth surface described in the present invention is that the contact between the support structure and the waveguide is not a large-area contact as a whole, but a number of small-area contacts, such as a small-area contact covering the area of ​​multiple grating teeth.

[0050] It can be understood that there is a gap between the protective sheet and the waveguide sheet. Usually, the grating structure is located in the middle area of ​​the waveguide surface. Under the action of external force, the inter-sheet contact formed after the protective sheet and / or waveguide sheet are deformed mostly occurs in the area where the grating structure is located. The present application breaks the conventional thinking in the prior art and sets the supporting structure on the protective sheet in the positive projection area of ​​the grating structure on the protective sheet, and sets the surface of the supporting structure close to the waveguide sheet as a non-smooth surface. In this way, the contact mode between the protective sheet and the waveguide sheet or between the waveguide sheets can be changed to avoid large-area contact and adhesion between the sheets. In addition, the changed inter-sheet contact mode is also conducive to restoring the deformation of the protective sheet or the waveguide sheet, thereby reducing the occurrence of Newton ring phenomenon, thereby improving the display effect in the existing lens, and having unexpected technical effects.

[0051] Practically, the waveguide sheet can be a resin sheet or a glass sheet; the protection sheet can be a resin sheet or a glass sheet.

[0052] Furthermore, the orthographic projection area of ​​the grating structure on the protective sheet is also called the grating structure projection area 310, and the surface of the protective sheet facing the waveguide sheet at least includes: the grating structure projection area 310, the connecting light path projection area 320 and the peripheral projection area, wherein the connecting light path projection area 320 is defined as the orthographic projection of the area of ​​the light path connected to the positions of the coupling-in grating 150 and the coupling-out grating 160 on the protective sheet; the peripheral projection area is defined as the orthographic projection of the area of ​​the non-effective light path on the protective sheet, that is, the area outside the grating structure projection area 310 and the connecting light path projection area 320. The support structure 210 can not only be set in the grating structure projection area, but also extend to other areas outside the grating structure projection area. For example, Figure 2-5, 7-11, extending to the connection light path projection area 320, for example, Figure 3 , 8 -11, further extending to the peripheral projection area.

[0053] It should be noted that, in some embodiments of the present application, the grating structure also includes a turning grating, and the projection area of ​​the connected light path at this time is defined as the positive projection of the area where the coupling-in grating, the turning grating and the coupling-out grating are located and the area of ​​the connected light path on the protective sheet. Of course, in other embodiments, the grating structure may also include other functional gratings, such as a recycling grating, etc., and the projection area of ​​the connected light path at this time is defined as the positive projection of the area where the grating structure is located and the area where the gratings in the grating structure are located and the area of ​​the connected light path on the protective sheet.

[0054] In one embodiment provided by the present invention, Figure 1-4 As shown, the support structure includes curing glue and particles filled in the curing glue, and the particle size of the particles is larger than the height of the curing layer formed after the curing glue is cured. Figure 1-4 The particles shown in the figure are only examples and are not intended to limit their quantity and position. Any position and quantity adjustments and limitations made by those skilled in the art based on the inventive concept of the present invention are within the protection scope of the present invention.

[0055] It is feasible to limit the spacing distribution of different particles in the support structure to a range of 0.2 mm to 20 mm in order to prevent large-area contact and adhesion between the protection sheet and the waveguide sheet, and to prevent the support structure from affecting the optical path in the waveguide sheet.

[0056] In the above embodiment, the particle size of the microparticles is limited to be larger than the height of the solidified layer formed after the curing glue is cured. After the curing glue is cured, the microparticles protrude from the solidified layer. When the protective sheet 110 contacts the grating structure area through the protruding microparticle structure, point contact is formed instead of surface contact, which reduces the possibility of forming Newton rings. In addition, the point contact method is convenient for restoring deformation, improving the ability of restoring performance, eliminating the contact between sheets, and further reducing the possibility of forming Newton rings. Further considering the possibility of the process and the actual display effect, the particle size of the microparticles is limited to be larger than 1 μm to prevent the microparticles from affecting the propagation of light; further, the particle size of the microparticles can be limited to be smaller than the gap distance when the waveguide sheet and the protective sheet are connected, thereby preventing the particle size of the microparticles from being too large to affect the connection of the waveguide.

[0057] It is feasible, such as Figure 2 and Figure 3 As shown, the thickness of the solidified layer formed after the curing glue in the support structure 210 is cured remains unchanged at different positions, and the particle sizes of the particles embedded in the solidified layer in the support structure within the projection area of ​​the grating structure are the same.

[0058] Furthermore, it is practicable and operable to make the particle sizes of the support structure 210 at different positions different, that is, to select particles of different particle sizes, so as to improve the ability of the protective sheet 110 to recover from deformation. Figure 4 As shown, the particle size of the particles in the grating structure projection area can be selectively limited to be different from the particle size of the particles in the connecting light path projection area, so that the connecting light path projection area has a stronger pressure-bearing capacity and is conducive to recovering deformation, thereby improving the recovery ability of the protective sheet under pressure and the display effect of the waveguide.

[0059] In one embodiment provided by the present invention, Figure 5-9 As shown, optionally, the support structure 210 includes a plurality of support units. Figure 5-9 The support unit shown in the figure is only an example and is not intended to be a limitation on the tooth shape, quantity, position, etc. Any adjustment or limitation on the tooth shape, position, quantity, etc. made by those skilled in the art based on the inventive concept of the present invention is within the protection scope of the present invention.

[0060] It should be noted that several support units of the support structure can also be connected through a substrate, such as Figure 5-9 As shown, the several support units of the support structure can be independent of each other, such as Fig.10 shown.

[0061] Optionally, the spacing between different support units is limited to be controlled between 0.2 mm and 20 mm.

[0062] Furthermore, it is practicable that Figure 7 As shown, a support structure 210 is formed on the inner surface of the protective sheet 110, which has a plurality of support units. The plurality of support units of the tooth-shaped structure are arranged in the grating structure projection area and the connecting light path projection area, but the tooth-shaped heights in different areas are different, such as the height of the support units in the grating structure projection area is different from the height of the support units in the connecting light path projection area. Exemplarily, the height of the support units in the connecting light path projection area is higher than the support units in other areas, and the formed support structure has a higher connecting light path projection area and a lower grating structure projection area. In this way, the tooth-shaped structure with a higher connecting light path projection area can make the protective sheet connecting light path projection area easier to restore deformation, thereby driving the entire protective sheet to restore deformation, preventing the entire protective sheet from being in contact with the grating structure area and the connecting light path area between gratings for a long time and causing "stickiness", further improving the display effect. Of course, the height difference between the two can be limited according to the display effect, and the present invention does not impose any restrictions.

[0063] As another improvement of the above solution, it is feasible to Figure 8As shown, in order to enhance the ability of the peripheral area of ​​the grating structure projection area on the protection sheet to recover deformation, especially the ability of the edge position close to the connector 120 to recover deformation, a plurality of support units with a toothed structure can be selectively arranged in the grating structure projection area, and extend outside the grating structure projection area to the vicinity of the connector, and the toothed height covering the grating structure area is smaller than the toothed height in other areas, and the middle height of the formed support structure is smaller than the height of the peripheral portion. Through such a structure and height design, during the compression and deformation process, the peripheral portion of the protection sheet has a stronger bearing capacity, and the peripheral portion can quickly recover deformation, thereby driving the entire protection sheet to recover its original shape, preventing the protection sheet from being compressed for a long time and thus affecting the display effect, which has unexpected technical effects.

[0064] Furthermore, it is feasible to improve the above-mentioned embodiment, such as Fig. 9 As shown, in order to improve the bearing capacity of the connection light path projection area and the peripheral projection area, the height of the support units in the grating structure projection area and the connection light path projection area is the same, but different from the height of the support units in the peripheral projection area. For example, only the support units in the grating structure projection area are lower than the support units in other areas, while the height of the support structure in the connection light path projection area and the peripheral projection area is higher. On the one hand, it can reduce the compression damage of the support structure to the grating and prevent the deformation of the grating structure. On the other hand, it can also improve the deformation recovery ability of the protective sheet in the middle and edge positions of the waveguide, and improve the deformation recovery ability from multiple areas.

[0065] It is known that the grating period of the grating structure is usually set at 300nm to 500nm, and the tooth width of each support unit of the support structure can be limited to the micron level. Optionally, the tooth width of each support unit in the support structure is further limited to more than 10 times the tooth width of each grating unit, that is, one support unit of the support structure can cover multiple or even more grating units. In this way, it is possible to prevent the support unit structure of the support structure from damaging or oppressing the grating structure, thereby protecting the grating structure, and preventing the support structure from having a large area of ​​contact with the waveguide when the display lens is deformed, thereby reducing the generation of Newton rings and improving the display capability of the display lens, with unexpected technical effects.

[0066] In one embodiment provided by the present invention, Fig.11As shown, it includes at least two layers of waveguide sheets 130 and at least one layer of protection sheet 110, the waveguide sheets and the protection sheet are stacked, a grating structure is arranged on one side of each waveguide sheet, a support structure 210 is arranged on a side surface of the protection sheet 110 facing the grating structure, and a support structure 210 is arranged on a side surface of the waveguide sheet in the middle facing another waveguide sheet, and the support structure 210 is arranged at least within the positive projection area of ​​the grating structure of the waveguide sheet on the protection sheet. The support structure can adopt the structure defined in any of the above embodiments, Fig.11 The support structures shown are examples only.

[0067] Meanwhile, the present invention seeks to protect a display device, which includes the display lens of any one of the aforementioned embodiments.

[0068] Furthermore, the display device includes AR glasses or HUD, etc.

[0069] According to the display lens provided by the present invention, a support structure is arranged on one side of the waveguide protection sheet, and the support structure is limited to be arranged at least in the positive projection area of ​​the grating structure on the protection sheet, and the surface of the support structure close to the waveguide sheet is arranged as a non-smooth surface, so that when the protection sheet and / or the waveguide sheet is deformed by pressure or the like, the contact mode between the protection sheet and the waveguide sheet or between the waveguide sheets is changed, thereby avoiding large-area contact and adhesion between the sheets, and the contact mode between the sheets in the present application is also conducive to restoring deformation, thereby reducing the occurrence of Newton ring phenomenon, improving the display effect in the existing lens, and having unexpected technical effects; optionally, the present invention also further limits the position and structure of the support structure, can change the contact mode between the sheets from different angles, improve the deformation recovery ability, and improve the performance of the display lens, which is a significant improvement.

[0070] In another embodiment of the present invention, the present invention provides a method for manufacturing a display lens, such as Fig.11 As shown, the display lens comprises at least one layer of waveguide sheet 130 and at least one layer of protection sheet 110, and the waveguide sheet 130 and the protection sheet 110 are stacked. The method comprises the following steps:

[0071] S1: a grating structure is arranged on the surface of the waveguide plate 130 facing the protective plate 110, wherein the grating structure includes an in-coupling grating 150 and an out-coupling grating 140;

[0072] S2: a support structure 210 is arranged on a surface of the protection sheet 110 facing the grating structure; the support structure 210 is arranged at least within the orthographic projection area of ​​the grating structure on the protection sheet; and a surface of the support structure close to the waveguide sheet is a non-smooth surface;

[0073] S3: Connect the waveguide sheet and the protection sheet through the connector 120 to form the display lens.

[0074] In step S1, the waveguide sheet and the protective sheet include light and thin materials such as waveguide glass or resin sheet, and a grating structure can be formed by etching or nanoimprinting techniques; the orthographic projection area of ​​the grating structure on the protective sheet is also called the grating structure projection area 310, and the surface of the protective sheet facing the waveguide sheet at least includes: the grating structure projection area 310, the connecting light path projection area 320 and the peripheral projection area, wherein the connecting light path projection area 320 is defined as the orthographic projection of the area of ​​the light path connected to the position where the coupling-in grating 150 and the coupling-out grating 160 are located on the protective sheet; the peripheral projection area is defined as the orthographic projection of the area of ​​the non-effective light path on the protective sheet, that is, the area outside the grating structure projection area 310 and the connecting light path projection area 320. The support structure 210 can not only be set in the grating structure projection area, but also extend to other areas outside the grating structure projection area. For example, Figure 2-5 , 7-11, extending to the connection light path projection area 320, for example, Figure 3 , 8 -11, further extending to the peripheral projection area.

[0075] It is known that the grating structure includes a turning grating in addition to the coupling-in grating and the coupling-out grating, and the projection area of ​​the connected light path at this time is defined as the positive projection of the area where the coupling-in grating, the turning grating and the coupling-out grating are located and the area of ​​the connected light path on the protective sheet. Of course, in other embodiments, the grating structure may also include other functional gratings, such as a recycling grating, etc., and the projection area of ​​the connected light path at this time is defined as the positive projection of the area where the grating structure is located and the area where the gratings in the grating structure are located and the area of ​​the connected light path on the protective sheet.

[0076] The grating structure may be defined as one-dimensional grating and / or two-dimensional grating, and the structure shape may include straight teeth, helical teeth, blazed grating, etc. or a combination thereof.

[0077] In step S2, a support structure 210 is provided on the surface of the protective sheet 110 facing the grating structure. The support structure can be formed by mold forming, printing, etching, nano-imprinting, etc., and the support structure is at least provided in the positive projection area of ​​the grating structure on the protective sheet.

[0078] Furthermore, for the selection of the material of the support structure, a material including a curing glue and particles filled in the curing glue as in the aforementioned embodiment may be selected; or a structure having a plurality of support units formed by curing the curing glue or etching the photoresist may be selected.

[0079] In the present invention, it can be known that when the supporting material includes a curing glue and particles filled in the curing glue, a supporting structure can be formed on the protective sheet by mold molding, printing, and inkjet printing. The area, time, height and other parameters of printing and inkjet printing can be limited to achieve control of the supporting structure, thereby forming a number of supporting units.

[0080] Further, when the structure defining a number of support units is formed by imprinting and curing a curing glue or etching a photoresist, the tooth width of each support unit in the support structure can be selected to be greater than 10 times the tooth width of each grating unit, that is, one support unit of the support structure can cover multiple or even more grating units. In this way, the support unit structure of the support structure can be prevented from damaging or oppressing the grating structure, thereby protecting the grating structure. Therefore, the tooth width of the support unit during imprinting or etching can be defined according to the tooth width of the grating unit. For example, the tooth width of the support unit can be defined within the range of 2μm to 150μm. Considering the visual impact of the appearance, it can be further defined within the range of 50μm to 120μm. As for the definition of its height, the height of each support unit is defined to be less than the height of the connecting piece, but greater than the height of the grating structure. Since the height of the grating is usually between tens of nanometers and hundreds of nanometers, the height of the support unit can be controlled within the range of 1μm to 0.2mm. As for the spacing between the support units, the spacing between different support units is controlled within the range of 0.2mm to 20mm.

[0081] At the same time, the surface of the support structure close to the waveguide sheet defined in the present application is a non-smooth surface, which means that after the support structure is arranged on the protective sheet, the surface of the side of the overall structure formed by the support structure and the protective sheet facing the waveguide sheet is not a plane and includes a number of randomly dispersed protrusions, the protrusion part contacts the waveguide sheet, and the size of the protrusion part in at least one direction is about 5-1000 times the grating period, so as not to damage the grating structure, and not to form a large-area contact with the waveguide sheet. In other words, the non-smooth surface described in the present invention is that the contact between the support structure and the waveguide sheet is not a large-area contact as a whole, but presents a number of small-area contacts locally, such as a small-area contact covering the area of ​​multiple grating teeth.

[0082] Furthermore, in step S2, when at least two optical waveguide sheets are included, a grating structure is provided on one side of each waveguide sheet, a support structure 210 is provided on a surface of the protective sheet 110 facing the grating structure, and a support structure 210 is provided on a surface of the middle waveguide sheet facing another waveguide sheet, and the support structure 210 is provided at least within the positive projection area of ​​the grating structure of the waveguide sheet on the protective sheet.

[0083] In step S3, the defined connecting part may be an adhesive layer with connecting capability, such as curing adhesive, OCA adhesive, etc. The connecting part is arranged at the edge of the waveguide, and it is only for connecting the waveguide sheet and the protective sheet. The limitation on the material, thickness or width is made by the technicians in this field during the specific design.

[0084] After step S3 is completed, an optical anti-reflection layer may be provided on the surface of the protection sheet or the waveguide sheet as required to improve the display effect and reduce the loss of reflected light.

[0085] Furthermore, it also includes setting a shading portion on the outer peripheral edge of the waveguide component, including a blackening operation, etc. The shading portion includes a black light-absorbing material, which is used to prevent crosstalk from external ambient light, etc., thereby improving the imaging quality of the waveguide component.

[0086] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A display lens, characterized in that: The invention comprises at least one layer of waveguide sheet and at least one layer of protection sheet, wherein the waveguide sheet and the protection sheet are stacked, a grating structure is arranged on a surface of the waveguide sheet facing the protection sheet, the grating structure comprises an in-coupling grating and an out-coupling grating, a supporting structure is arranged on a surface of the protection sheet facing the grating structure, the supporting structure is arranged at least in the orthographic projection area of ​​the grating structure on the protection sheet, a surface of the supporting structure close to the waveguide sheet is a non-smooth surface, and the supporting structure is configured not to affect the optical path of the waveguide sheet.

2. The display lens according to claim 1, characterized in that: The support structure is arranged in the orthographic projection area of ​​the grating structure on the protection sheet and extends outside the orthographic projection area.

3. The display lens according to claim 1 or 2, characterized in that: The support structure includes curing glue and particles filled in the curing glue, and the particle size of the particles is greater than the height of the curing layer formed after the curing glue is cured.

4. The display lens according to claim 1 or 2, characterized in that: The supporting structure includes a plurality of supporting units.

5. The display lens according to claim 3 or 4, characterized in that: The invention comprises at least two layers of waveguide plates and at least one layer of protection plate, wherein the waveguide plates and the protection plate are stacked, a grating structure is arranged on one side surface of each waveguide plate, the support structure is arranged on one side surface of the protection plate facing the grating structure, and the support structure is arranged on one side surface of a middle waveguide plate facing another waveguide plate, and the support structure is arranged at least within the positive projection area of ​​the grating structure of the waveguide plate within the protection plate.

6. A method for manufacturing a display lens, wherein the display lens comprises at least one waveguide sheet and at least one protective sheet, wherein the waveguide sheet and the protective sheet are stacked; characterized in that: The method comprises the following steps: S1: Arranging a grating structure on the surface of the waveguide plate facing the protective plate, wherein the grating structure comprises an in-coupling grating and an out-coupling grating; S2: a support structure is arranged on the surface of the protection sheet facing the grating structure; the support structure is arranged at least within the orthographic projection area of ​​the grating structure on the protection sheet; and the surface of the support structure close to the waveguide sheet is a non-smooth surface; S3: Connecting the waveguide plate and the protection plate through a connecting member.

7. The method for manufacturing a display lens according to claim 6, characterized in that: In step S2, providing a support structure on a surface of the protection sheet facing the grating structure specifically includes forming the support structure on the protection sheet by mold forming, printing, etching, nano-imprinting or inkjet printing technology.

8. A method for manufacturing a display lens according to claim 6 or 7, characterized in that: The support structure comprises a plurality of support units, and the tooth width of the support unit is more than 10 times greater than the tooth width of each grating unit.

9. The method for manufacturing a display lens according to claim 8, characterized in that: The tooth width of each of the plurality of support units is 2 μm to 150 μm; the tooth width of each support unit is limited to 50 μm to 120 μm; and the height of each support unit is 1 μm to 0.2 mm.

10. The method for manufacturing a display lens according to claim 8 or 9, characterized in that: The spacing between different support units among the plurality of support units is controlled to be 0.2 mm to 20 mm.

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