Anti-dazzling screen, lenses and intelligent glasses

Abstract

The invention relates to the technical field of intelligent glasses, provides an anti-dazzling screen, lenses and intelligent glasses, and can solve the problem that the intelligent glasses easily generate rainbow patterns in the visual field of a wearer in the prior art. The lens is used in the intelligent glasses and comprises an optical waveguide lens and an anti-dazzling screen, and the anti-dazzling screen is stacked on at least the first side of the optical waveguide lens; the shading sheet comprises a light-permeable sheet body and a shading structure array arranged on the sheet body, at least one part of the shading structure array is arranged in a first area of the sheet body, and the first area is orthographic projection of a turning grating area of the optical waveguide lens on the sheet body; the shading structure array comprises a plurality of first shading structures, and in the first section, a light-transmitting gap is formed between every two adjacent first shading structures; wherein the first cross section is a cross section which passes through each point on the first axis of the sheet body and is parallel to the arrangement direction of the gratings in the turning grating area. The method can be applied to intelligent glasses such as AR glasses.

Description

Technical Field

[0001] This application relates to the field of smart glasses technology, and more particularly to a light-shielding film, a lens, and smart glasses. Background Technology

[0002] With the development of electronic technology, smart glasses such as AR (augmented reality) glasses have emerged. AR glasses use augmented reality technology, allowing wearers to view their surroundings while virtual images are projected onto their eyes, providing an unprecedented interactive experience. The lenses of AR glasses are crucial for realizing augmented reality technology, and how to design AR glasses lenses has become an important research topic in the industry. Summary of the Invention

[0003] Embodiments of this application provide a light-shielding sheet, a lens, and smart glasses to solve the problem in related technologies where smart glasses easily produce rainbow patterns in the wearer's field of vision.

[0004] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0005] In a first aspect, embodiments of this application provide a lens for use in smart glasses, comprising an optical waveguide lens and a light-shielding plate. The optical waveguide lens has a first side and a second side opposite to each other. The first side is the side of the optical waveguide lens away from the wearer's eye; the second side is the side of the optical waveguide lens closer to the wearer's eye. At least the first side of the optical waveguide lens is provided with a light-shielding plate. The optical waveguide lens has an insertion grating region, a deflection grating region, and an exit grating region. The deflection grating region is used to deflect a first light beam coupled into the optical waveguide lens by the insertion grating region to the exit grating region, and the exit grating region is used to couple the first light beam out to the second side of the optical waveguide lens. The light-shielding plate includes a light-transmitting sheet body and a light-shielding plate disposed on the sheet body. A light-shielding structure array is provided, with at least a portion of the array disposed in a first region of the sheet body. The first region is the orthographic projection of the grating region onto the sheet body. The light-shielding structure array includes multiple first light-shielding structures arranged side by side within a first cross-section, with a light-transmitting gap between adjacent first light-shielding structures. The light-shielding structure array is used to block incident light at a portion of the incident angle of the grating region. The first cross-section is a cross-section passing through each point on the first axis of the sheet body and intersecting with the light-shielding structure array. The first cross-section is parallel to the arrangement direction of the gratings in the grating region. The first axis intersects with the first region and is perpendicular to the width direction and height direction of the sheet body.

[0006] In this embodiment, the lens has a light-shielding plate on at least one side of the waveguide lens, and at least a portion of the light-shielding structure array is located in the first region. When ambient light shines on the light-shielding structure array, it acts as a "filter," allowing incident light at a certain angle to pass through the light-transmitting gap and illuminate the transition grating area, while the other incident light is blocked by the first light-shielding structures on both sides of the light-transmitting gap. By designing the structural parameters of the first light-shielding structures in the light-shielding structure array, the incident angle range of the incident light illuminating the transition grating area can be controlled, thus blocking incident light that could produce rainbow patterns and eliminating the rainbow effect. This reduces the adverse visual impact of the rainbow pattern on the wearer, thereby improving the user experience. Furthermore, this embodiment achieves the effect of eliminating rainbow patterns by adding a light-shielding plate to the waveguide lens, eliminating the need for redesigning the grating area on the waveguide lens and avoiding increased design and manufacturing costs.

[0007] In some embodiments of the first aspect, within a first cross-section, the first light-shielding structure has two opposing sides, which are inclined relative to the first axis. Along the first axis and in a direction from the second side of the waveguide lens to the first side, the distance from the side to the first axis gradually increases. This arrangement allows the light-transmitting gap to better match the wearer's field of vision, thereby improving the lens transmittance at the corresponding wearer's line-of-sight position.

[0008] In some embodiments of the first aspect, for the first light-shielding structure disposed in the first region, the tilt angle of its side relative to the first axis is greater than or equal to 25°. This arrangement reduces the obstruction of the wearer's view by the first light-shielding structure, thereby reducing the impact of the light-shielding structure array on the wearer's field of vision.

[0009] In some embodiments of the first aspect, along a direction away from the first axis, the tilt angle of the side of each of the first light-shielding structures in the light-shielding structure array relative to the first axis increases progressively. Here, "progressively" specifically refers to the first light-shielding structure; that is, between two adjacent first light-shielding structures, the side tilt angle of the first light-shielding structure farther from the first axis is greater than the side tilt angle of the first light-shielding structure closer to the first axis. The tilt angles of the two sides of the same first light-shielding structure can be equal or unequal. This arrangement allows the light transmission gap in the radial direction of the lens to better match the wearer's field of vision, thereby ensuring similar transmittance at different positions in the radial direction of the lens.

[0010] In some embodiments of the first aspect, a light-shielding structure array is disposed in the first region. This arrangement can reduce the impact of the light-shielding structure array on the overall transmittance of the lens.

[0011] In some embodiments of the first aspect, the first light-shielding structure is a strip structure and is arranged along the arrangement direction of the grating, with the length direction of the first light-shielding structure perpendicular to the arrangement direction of the grating. This arrangement can reduce the obstruction of incident light directed toward the grating slit by the light-transmitting gap, thereby reducing the impact of the light-shielding structure array on the transmittance of the lens at the first region position.

[0012] In some embodiments of the first aspect, in the light-shielding structure array, a plurality of first light-shielding structures are arranged along a direction perpendicular to the first axis, each first light-shielding structure being a curved structure and arranged around the first axis. This arrangement allows the light-transmitting gap to better match the wearer's field of vision in the circumferential direction of the lens, thereby ensuring that the lens has similar transmittance at different positions in the circumferential direction.

[0013] In some embodiments of the first aspect, in the light-shielding structure array, a portion of the first light-shielding structures are annular structures arranged to form an annular array; another portion of the first light-shielding structures are arc-shaped structures arranged to form an arc array, the arc array being located on the periphery of the annular array, and at least a portion of them being disposed in the first region. This arrangement allows the light-transmitting gap to better match the wearer's field of vision in the circumferential direction of the lens, thereby enabling the lens to have more similar transmittance at different positions in the circumferential direction.

[0014] In some embodiments of the first aspect, the lens includes a first lens surface and a second lens surface disposed opposite to each other, and an array of light-shielding structures is distributed across the entire surface of the first lens surface. This arrangement can reduce the difference in transmittance between different areas of the entire lens, thereby making the transmittance of the entire lens more uniform.

[0015] In some embodiments of the first aspect, for the light-shielding sheet disposed on the first side of the optical waveguide lens, the incident light through the light-transmitting gap includes a first incident light and a second incident light. The first incident light is incident on the light-transmitting gap from the side closer to the first axis, and the second incident light is incident on the light-transmitting gap from the side farther from the first axis. The minimum incident angle of the first incident light blocked by the light-shielding structure array is θ1, and the minimum incident angle of the second incident light blocked by the light-shielding structure array is θ2. θ1 and θ2 satisfy: θ1 < θ2. This arrangement can reduce the blocking of the second incident light with a larger incident angle by the light-shielding structure array, thereby reducing the influence of the light-shielding structure array on the wearer's field of vision.

[0016] In some embodiments of the first aspect, θ1 satisfies: 60°≤θ1≤65°. This arrangement ensures that the light-shielding structure array is less likely to miss a portion of the first incident light capable of producing rainbow patterns, while also reducing the impact on the lens transmittance.

[0017] In some embodiments of the first aspect, θ2 satisfies: 70°≤θ2≤75°. This arrangement ensures that the light-shielding structure array is less likely to miss a portion of the second incident light that could produce rainbow patterns, while also reducing the impact on the lens transmittance.

[0018] In some embodiments of the first aspect, light-shielding sheets are stacked on both the first and second sides of the optical waveguide lens. This arrangement can greatly improve the elimination effect of rainbow patterns.

[0019] In some embodiments of the first aspect, a light-shielding sheet is stacked on the first side of the optical waveguide lens, and a protective sheet is stacked on the second side of the optical waveguide lens. This arrangement can prevent external dust and other contaminants from contacting the optical waveguide lens and affecting the propagation of light inside the optical waveguide lens.

[0020] In some embodiments of the first aspect, within the first cross-section, the bottom width of the first light-shielding structure is d1, and the bottom width of the light-transmitting gap is d2; "bottom" refers to the end closest to the lens body; d1 and d2 satisfy: 1≤d2 / d1≤5. This configuration ensures both the transmittance of the lens and the elimination of rainbow patterns.

[0021] In some embodiments of the first aspect, the bottom width of the light-transmitting gap within the first cross-section is d2, where "bottom" refers to the end closest to the lens body; the height of the first light-shielding structure is h; and h and d2 satisfy: 1 ​​≤ d2 / h ≤ 5. This configuration ensures both the transmittance of the lens and the elimination of rainbow patterns.

[0022] Secondly, embodiments of this application provide a smart glasses, which can be AR glasses, including a frame, an optical engine, and the lens mentioned in the first aspect. Both the lens and the optical engine are mounted on the frame, and the light output port of the optical engine faces the coupling grating area of ​​the lens.

[0023] The beneficial effects of the smart glasses in this embodiment are the same as those of the lenses in the first aspect, and will not be repeated here.

[0024] Thirdly, embodiments of this application provide a light-shielding sheet for stacking with the waveguide lens of smart glasses, comprising a light-transmitting sheet body and a light-shielding structure array disposed on the sheet body; the sheet body has a first region and a second region, the first region being opposite to the turning grating region of the waveguide lens, and the second region being opposite to the coupling grating region of the waveguide lens; at least a portion of the light-shielding structure array is disposed in the first region; the light-shielding structure array includes a plurality of first light-shielding structures, which are arranged side by side in a first cross section, and there is a light-transmitting gap between two adjacent first light-shielding structures; wherein, the first cross section is a cross section passing through each point on the first axis of the sheet body and intersecting with the light-shielding structure array; the first axis intersects with the second region, and is perpendicular to the width direction and the height direction of the sheet body.

[0025] The beneficial effects of the light-shielding sheet in this embodiment are the same as those of the lens in the first aspect, and will not be repeated here.

[0026] In some embodiments of the third aspect, within the first cross-section, the first light-shielding structure has two opposing sides, the sides being inclined relative to the first axis, with the top of the side offset from the bottom of the side away from the first axis. "Top" refers to the end away from the lens body; "bottom" refers to the end closer to the lens body. This light-shielding sheet can be stacked on the first side of the waveguide lens, thus allowing the light transmission gap to better match the wearer's field of vision, thereby improving the lens transmittance at the corresponding wearer's line of sight.

[0027] In some embodiments of the third aspect, within the first cross-section, the first light-shielding structure has two opposing sides, the sides being inclined relative to the first axis, with the top of the side offset from the bottom of the side towards the side closer to the first axis. "Top" refers to the end furthest from the lens body; "bottom" refers to the end closer to the lens body. This light-shielding sheet can be stacked on the second side of the optical waveguide lens, thus allowing the light transmission gap to better match the wearer's field of vision, thereby improving the lens transmittance at the corresponding wearer's line of sight position.

[0028] In some embodiments of the third aspect, for the first light-shielding structure disposed in the first region, the tilt angle of its side relative to the first axis is greater than or equal to 25°. This arrangement reduces the obstruction of the wearer's view by the first light-shielding structure, thereby reducing the impact of the light-shielding structure array on the wearer's field of vision.

[0029] In some embodiments of the third aspect, along a direction away from the first axis, the tilt angle of the side of each of the first light-shielding structures in the light-shielding structure array relative to the first axis increases progressively. Here, "progressively" specifically refers to the first light-shielding structure; that is, between two adjacent first light-shielding structures, the side tilt angle of the first light-shielding structure farther from the first axis is greater than the side tilt angle of the first light-shielding structure closer to the first axis. The tilt angles of the two sides of the same first light-shielding structure can be equal or unequal. This arrangement allows the light transmission gap in the radial direction of the lens to better match the wearer's field of vision, thereby ensuring similar transmittance at different positions in the radial direction of the lens.

[0030] In some embodiments of the third aspect, the incident light through the light-transmitting gap includes a first incident light and a second incident light. The first incident light is incident on the light-transmitting gap from the side closer to the first axis, and the second incident light is incident on the light-transmitting gap from the side farther from the first axis. The minimum incident angle of the first incident light blocked by the light-blocking structure array is θ1, and the minimum incident angle of the second incident light blocked by the light-blocking structure array is θ2. θ1 and θ2 satisfy: θ1 < θ2. This configuration reduces the blocking of the second incident light with a larger incident angle by the light-blocking structure array, thereby reducing the impact of the light-blocking structure array on the wearer's field of vision.

[0031] In some embodiments of the third aspect, θ1 satisfies: 60°≤θ1≤65°. This arrangement ensures that the light-shielding array is less likely to miss a portion of the first incident light that could produce a rainbow effect, while also reducing the impact on the lens transmittance.

[0032] In some embodiments of the third aspect, θ2 satisfies: 70°≤θ2≤75°. This arrangement ensures that the light-shielding array is less likely to miss a portion of the second incident light that could produce rainbow patterns, while also reducing the impact on the lens transmittance.

[0033] In some embodiments of the third aspect, the light-shielding structure array is disposed in the first region. This arrangement can reduce the impact of the light-shielding structure array on the overall transmittance of the lens.

[0034] In some embodiments of the third aspect, the first light-shielding structure is a strip-shaped structure and is inclined relative to the width direction of the lens body, and the arrangement direction of the first light-shielding structure is perpendicular to the length direction of the first light-shielding structure. This arrangement can reduce the obstruction of incident light directed toward the grating slit by the light-transmitting gap, thereby reducing the impact of the light-shielding structure array on the transmittance of the lens at the first region position.

[0035] In some embodiments of the third aspect, in the light-shielding structure array, multiple first light-shielding structures are arranged along a direction perpendicular to the first axis, each first light-shielding structure being a curved structure and positioned around the first axis. This arrangement allows the light-transmitting gap to better match the wearer's field of vision in the circumferential direction of the lens, thereby ensuring similar transmittance at different positions in the circumferential direction.

[0036] In some embodiments of the third aspect, in the light-shielding structure array, a portion of the first light-shielding structures are annular structures arranged to form an annular array; another portion of the first light-shielding structures are arc-shaped structures arranged to form an arc array, the arc array being located on the periphery of the annular array, and at least a portion of them being disposed in the first region. This arrangement allows the light-transmitting gap to better match the wearer's field of vision in the circumferential direction of the lens, thereby enabling the lens to have more similar transmittance at different positions in the circumferential direction.

[0037] In some embodiments of the third aspect, the lens includes a first lens surface and a second lens surface disposed opposite to each other, and an array of light-shielding structures is distributed across the entire surface of the first lens surface. This arrangement can reduce the difference in transmittance between different areas of the entire lens, thereby making the transmittance of the entire lens more uniform.

[0038] In some embodiments of the third aspect, within the first cross-section, the bottom width of the first light-shielding structure is d1, and the bottom width of the light-transmitting gap is d2; "bottom" refers to the end closest to the lens body; d1 and d2 satisfy: 1≤d2 / d1≤5. This configuration ensures both the transmittance of the lens and the elimination of rainbow patterns.

[0039] In some embodiments of the third aspect, the bottom width of the light-transmitting gap within the first cross-section is d2, where "bottom" refers to the end closest to the lens body; the height of the first light-shielding structure is h; and h and d2 satisfy: 1 ​​≤ d2 / h ≤ 5. This configuration ensures both the transmittance of the lens and the elimination of rainbow patterns. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the structure of an AR glasses device in related technologies;

[0041] Figure 2 for Figure 1 A schematic diagram of the lens structure of AR glasses;

[0042] Figure 3 for Figure 1 A schematic diagram of the AR glasses.

[0043] Figure 4a Light path for generating rainbow patterns from ambient light at different incident angles Figure 1 ;

[0044] Figure 4b Light path for generating rainbow patterns from ambient light at different incident angles Figure 2 ;

[0045] Figure 5 This is a schematic diagram of the structure of smart glasses in some embodiments of this application;

[0046] Figure 6 for Figure 5 A structural diagram of the smart glasses from another perspective;

[0047] Figure 7 for Figure 5 Exploded view of smart glasses;

[0048] Figure 8 This is a schematic diagram of the lens structure in the first embodiment of this application;

[0049] Figure 9 for Figure 8 Exploded view of the middle lens from a single perspective;

[0050] Figure 10 for Figure 8 The image shown is an exploded view of the lens from another perspective;

[0051] Figure 11 for Figure 8 Schematic diagram of the middle lens (after removing the light shield);

[0052] Figure 12 for Figure 8 A diagram showing the relationship between the BB cross-sectional view of the middle lens and the wearer's eye position;

[0053] Figure 13 for Figure 12 A magnified view of a portion of the edge area of ​​the middle lens;

[0054] Figure 14 It shows Figure 8 The relationship between the incident angle of ambient incident light and the transmittance of the lens in the first region 211 is shown in the figure.

[0055] Figure 15 This is a longitudinal cross-sectional view of the lens in the second embodiment of this application;

[0056] Figure 16 for Figure 15 A magnified view of a portion of the lens at the edge region;

[0057] Figure 17 This is a schematic diagram of the lens structure in the third embodiment of this application;

[0058] Figure 18 for Figure 17CC cross-section of the lens in the image;

[0059] Figure 19 for Figure 18 A magnified view of a portion of the lens at the edge region;

[0060] Figure 20 for Figure 18 A graph showing the relationship between the incident angle of ambient incident light and the transmittance of the lens at different positions.

[0061] Figure 21 This is a schematic diagram of the lens structure in the fourth embodiment of this application;

[0062] Figure 22 for Figure 21 DD cross-sectional view of the lens in the image;

[0063] Figure 23 for Figure 22 A magnified view of a portion of the lens at the edge region;

[0064] Figure 24 for Figure 22 The graph shows the relationship between the incident angle of ambient incident light and the transmittance of the lens at different positions. Detailed Implementation

[0065] The technical solutions in some embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0066] With the development of electronic technology, smart glasses such as AR glasses have emerged. AR glasses use augmented reality technology, allowing wearers to view their surroundings while virtual images are projected onto their eyes, providing an unprecedented interactive experience. The lenses of AR glasses are crucial for realizing augmented reality technology, and how to design AR glasses lenses has become an important research topic in the industry.

[0067] Figure 1 This is a structural diagram of an AR glasses device in related technologies, such as... Figure 1 As shown, the AR glasses include a lens 100, a frame 200, and an optical engine 300 (also known as a micro-projector, miniature image source, etc.). Both the lens 100 and the optical engine 300 are mounted on the frame 200. The frame 200 includes a lens frame 210 and temples 230 connected to the lens frame 210. The lens 100 is mounted in the lens frame 210, and the optical engine 300 is mounted at the junction of the temples 230 and the lens frame 210. The light outlet of the optical engine 300 faces the lens 100.

[0068] Figure 2 for Figure 1 A schematic diagram of the lens structure of AR glasses, as shown below. Figure 2 As shown, the lens 100 is an optical waveguide lens. The lens 100 has an insertion grating region 11, an output grating region 13, and a turning grating region 12. The insertion grating region 11 is located at the corner of the lens 100 and is opposite to the light output port of the optical engine 400. The output grating region 13 intersects the axis L0 of the lens 100. The turning grating region 12 is located between the output grating region 13 and the edge of the lens 100. The axis L0 of the lens 100 is a straight line passing through the output grating region 13 of the lens 100. The position of the axis L0 of the lens 100 is to face the pupil of the wearer's eye.

[0069] Figure 3 for Figure 1 A schematic diagram of the AR glasses, as shown below. Figure 3 As shown, the projection light containing the virtual image emitted by the optical engine 400 is coupled into the lens 100 through the coupling grating area 11, and after being deflected by the deflection grating area 12, it is coupled out through the coupling exit grating area 13 to the outside of the lens 100, so as to enter the wearer's eye to form an image. At the same time, the lens 100 can also allow ambient light to pass through and enter the wearer's eye to form an image. In this way, the wearer can simultaneously observe the virtual image and the surrounding real scene, thereby achieving display enhancement.

[0070] like Figure 4a and Figure 4b As shown, Figure 4a , Figure 4b The optical path diagrams showing the rainbow effect produced by ambient light at different incident angles are shown. Since the same grating produces different diffraction angles for different wavelengths of light, when ambient light shines on the grating of lens 100, the non-zero order diffracted light of the ambient light will produce dispersion, that is, diffracted light of different wavelengths will separate to form a dispersed beam (for example, a dispersed beam can be composed of red light, green light, and blue light). These dispersed beams will produce a rainbow effect in the wearer's field of vision when they enter the wearer's eyes, thus affecting the wearer's user experience.

[0071] Among them, the angular grating region 12 has a greater impact on the rainbow pattern. This is determined by the relative positions of the ambient light source, the angular grating region 12, and the wearer's eyes. The dispersive light beam generated at the location of the angular grating region 12 is more likely to enter the human eye than the dispersive light beam generated by grating regions at other locations. For example... Figure 4a As shown, the ambient light source is Figure 4a In the upper left position of the image, when ambient light shines on the grating of the deflection grating area 12, the resulting dispersive beam is deflected towards the side closer to the axis L0 of the lens 100. Since the deflection grating area 12 is closer to the edge of the lens 100 and farther from the axis L0 of the lens 100 than the coupling grating area 13, the dispersive beam generated by the ambient light through the deflection grating area 12 is more likely to enter the wearer's eye; for example... Figure 4aAs shown, when the incident angle of ambient light is within the range of [β1, β3], the dispersive beam of ambient light generated by the deflection grating region 12 can enter the wearer's eye to produce a rainbow pattern; for example... Figure 4b As shown, the ambient light source is Figure 4b When the incident angle of ambient light is in the upper right position of the image, within the range of [β2, β4], the dispersive beam of ambient light generated by the deflection grating region 12 can enter the wearer's eye to produce a rainbow pattern.

[0072] Therefore, this application provides a light-shielding sheet, a lens, and smart glasses. By setting a light-shielding sheet on the outer side of the optical waveguide lens of the lens, the light-shielding sheet is used to block ambient light at a certain incident angle from entering the turning grating area, thereby achieving the effect of eliminating rainbow patterns and improving the user experience.

[0073] Figure 5 This is a schematic diagram of the structure of smart glasses in some embodiments of this application. Figure 6 for Figure 5 A structural diagram of the smart glasses from another perspective. Figure 7 for Figure 5 An exploded view of the smart glasses. These are AR glasses and include lenses 100, a frame 200, and an optical engine 300. Both lenses 100 and the optical engine 300 are mounted on the frame 200, with the light output port of the optical engine 300 facing the lenses 100. The optical engine 300 can be a laser light source or a miniature LED light source; no specific limitation is made here.

[0074] The structure of the frame 200 is not unique; in some embodiments, such as... Figure 5 and Figure 6 As shown, the frame 200 includes a frame 210, a bridge 220, and temples 230. There are two frames 210, a left frame 210a and a right frame 210b, with the bridge 220 connecting the left and right frames 210a and 210b. There are also two lenses 100, a left lens 100a and a right lens 100b. The left lens 100a is located in the left frame 210a and faces the wearer's left eye, while the right lens 100b is located in the right frame 210b and faces the wearer's right eye.

[0075] There are two temples 230, namely left temple 230a and right temple 230b. Left temple 230a is connected to left frame 210a, and right temple 230b is connected to right frame 210b. There are two optical engines 300, namely left optical engine 300a and right optical engine 300b. Left optical engine 300a is located at the junction of left temple 230a and left frame 210a, and its light output port faces left lens 100a. Right optical engine 300b is located at the junction of right temple 230b and right frame 210b, and its light output port faces right lens 100b.

[0076] The structure of the frame 210 is not unique. In some embodiments, the frame 210 can be a quadrilateral frame, such as... Figure 5 , Figure 6 and Figure 7 As shown, the frame 210 includes a first horizontal frame 211 and a second horizontal frame 212 spaced apart along the height direction Y of the lens 100, and a first vertical frame 213 and a second vertical frame 214 spaced apart along the width direction X of the lens 100. The first horizontal frame 211, the second horizontal frame 212, the first vertical frame 213, and the second vertical frame 214 are all curved structures. The first vertical frame 213 and the second vertical frame 214 are respectively connected between the first horizontal frame 211 and the second horizontal frame 212. The temple 230 is connected at a corner formed by the first vertical frame 213 and the first horizontal frame 211. The width direction X of the lens 100 and the height direction Y of the lens 100 are perpendicular, and the width direction X of the lens 100 can be parallel to the arrangement direction of the left frame 210a and the right frame 210b.

[0077] Of course, in addition to being a quadrilateral frame, the frame 210 can also be a circular frame or an oval frame, depending on the actual situation. In addition to the above structure, the frame 200 can also be configured with other structures according to the actual situation. For example, the frame 200 can also include a fixing strap, which is connected to the frame 210 to replace the temple 230.

[0078] Figure 8 This is a schematic diagram of the structure of the lens 100 in the first embodiment of this application. Figure 9 for Figure 8 Exploded view of a medium lens 100 from one angle. Figure 10 for Figure 8 The exploded view of lens 100 from another perspective is shown. Figure 11 for Figure 8 Schematic diagram of the middle lens 100 (after removing the light-blocking film 2). Figure 12 for Figure 8 Diagram showing the relationship between the BB cross-sectional view of the 100mm lens and the wearer's eye position. Figure 13 for Figure 12 A magnified view of the edge region of the middle lens 100.

[0079] like Figure 8 , Figure 9 and Figure 12 As shown, the lens 100 includes an optical waveguide lens 1 and a light-shielding sheet 2. The optical waveguide lens 1 has a first side and a second side opposite to each other, and the light-shielding sheet 2 is stacked on the first side of the optical waveguide lens 1.

[0080] The first side of the optical waveguide lens 1 is the side of the optical waveguide lens 1 away from the wearer's eyes, that is, the outer side of the optical waveguide lens 1; the second side of the optical waveguide lens 1 is the side of the optical waveguide lens 1 closer to the wearer's eyes, that is, the inner side of the optical waveguide lens 1.

[0081] like Figure 8 , Figure 10 and Figure 11 As shown, the optical waveguide lens 1 has an insertion grating region 11, a deflection grating region 12, and an output grating region 13. The deflection grating region 12 is disposed between the output grating region 13 and the edge of the optical waveguide lens 1. The insertion grating region 11 is used to face the light output port of the optical engine 100. The deflection grating region 12 is used to deflect the first beam coupled into the optical waveguide lens 1 by the insertion grating region 11 to the output grating region 13. The output grating region 13 is used to couple the first beam out to the second side of the optical waveguide lens 1.

[0082] The coupling grating region 11, the transition grating region 12, and the coupling out grating region 13 can be surface relief gratings. Surface relief gratings are formed by fabricating periodic structures of varying depths on the surface of the waveguide lens 1 using micro-nano fabrication processes. However, they are not limited to this; the coupling grating region 11, the transition grating region 12, and the coupling out grating region 13 can also be other types of gratings.

[0083] The shapes of the coupling-in grating region 11, the coupling-out grating region 13, and the transition grating region 12 are not unique; in some embodiments, such as... Figure 10 and Figure 11As shown, the coupled-in grating region 11 can be circular, the coupled-out grating region 13 can be rectangular, and the transition grating region 12 can be quadrilateral. This quadrilateral has a first longitudinal boundary line 121 and a second longitudinal boundary line 122 spaced apart along the width direction X of the lens 100, and a first transverse boundary line 123 and a second transverse boundary line 124 spaced apart along the height direction Y of the lens 100. The first longitudinal boundary line 121 is located between the second longitudinal boundary line 122 and the coupled-out grating region 13, and both the first longitudinal boundary line 121 and the second longitudinal boundary line 122 are inclined relative to the height direction Y of the lens 100. The first transverse boundary line 123 is located between the second transverse boundary line 124 and the coupled-in grating region 11, and the second transverse boundary line 124 extends along the height direction Y of the lens 100. The first transverse boundary line 123 is inclined relative to the second transverse boundary line 124.

[0084] The shapes of the coupled-in grating region 11, the coupled-out grating region 13, and the turning grating region 12 are not limited to those shown above, and can also be set to other regular or irregular shapes according to actual conditions.

[0085] The arrangement direction of the gratings in the coupling-in grating region 11, the turning grating region 12, and the coupling-out grating region 13 is not unique. In some embodiments, such as... Figure 10 and Figure 11 As shown, the arrangement direction of the gratings in the coupled grating region 11 is perpendicular to the width direction X of the lens 100, the arrangement direction of the gratings in the turning grating region 12 is tilted relative to the width direction X of the lens 100, and the arrangement direction of the gratings in the coupled grating region 13 is tilted relative to the width direction X of the lens 100.

[0086] Of course, it is not limited to this. The arrangement direction of the grating in the coupled grating region 11 can also be parallel to the width direction X of the lens 100, and the arrangement direction of the grating in the coupled grating region 13 can also be perpendicular to the width direction X of the lens 100.

[0087] The positions of the coupling-in grating region 11, the coupling-out grating region 13, and the transition grating region 12 on the optical waveguide lens 1 are not unique. In some embodiments, the coupling-in grating region 11, the coupling-out grating region 13, and the transition grating region 12 can be disposed on the same surface of the optical waveguide lens 1, for example... Figure 12 As shown, the coupling-in grating region 11, the coupling-out grating region 13, and the transition grating region 12 are all disposed on the surface of the second side of the optical waveguide lens 1. In other embodiments, the coupling-in grating region 11, the coupling-out grating region 13, and the transition grating region 12 may also be disposed on different surfaces of the optical waveguide lens 1. For example, the coupling-in grating region 11 and the transition grating region 12 may be disposed on the surface of the second side of the optical waveguide lens 1, and the coupling-out grating region 13 may be disposed on the surface of the first side of the optical waveguide lens 1.

[0088] To prevent external dust and other contaminants from coming into contact with the optical waveguide lens 1, in some embodiments, such as... Figure 12 and Figure 13 As shown, the lens 100 also includes a protective sheet 4, which is stacked on the second side of the optical waveguide lens 1. This arrangement allows the protective sheet 4 to protect the optical waveguide lens 1, preventing external dust and other contaminants from contacting the optical waveguide lens 1 and affecting the propagation of light inside the optical waveguide lens 1.

[0089] In some embodiments, such as Figure 10 and Figure 12 As shown, adhesive layers 5 are respectively provided between the edge of the light-shielding sheet 2 and the optical waveguide lens 1, and between the edge of the protective sheet 4 and the optical waveguide lens 1, to bond and fix the light-shielding sheet 2, the optical waveguide lens 1, and the protective sheet 4. The adhesive layer 5 can be annular.

[0090] like Figure 8 , Figure 9 and Figure 10 As shown, the light-shielding sheet 2 includes a light-transmitting sheet body 21 and a light-shielding structure array 22 disposed on the sheet body 21. The sheet body 21 has a first region 211 and a second region 212. The first region 211 is the orthographic projection of the turning grating region 12 on the sheet body 21, and the second region 212 is the orthographic projection of the coupling grating region 13 on the sheet body 21. At least a portion of the light-shielding structure array 22 is disposed in the first region 211.

[0091] The lens body 21 also has a first axis L1, which is positioned to face the pupil of the wearer's eye. The first axis L1 intersects with the first region 211 and is perpendicular to both the width direction and the height direction of the lens body 21. The width direction of the lens body 21 is parallel to the width direction X of the lens 100, and the height direction of the lens body 21 is parallel to the height direction Y of the lens 100. Figure 9 As shown, the first axis L1 can pass through the geometric center O1 of the second region 212, but it is not limited to this. The first axis L1 can also be set off from the geometric center O1 of the second region 212.

[0092] like Figure 8 and Figure 12 As shown, the light-shielding structure array 22 includes multiple first light-shielding structures 221, within a first cross-section (e.g., Figure 8 and Figure 12 As shown in the BB cross section, multiple first light-shielding structures 221 are arranged side by side, and there is a light-transmitting gap 222 between two adjacent first light-shielding structures 221. The light-shielding structure array 22 is used to block incident light at a part of the incident angle of the turning grating region 12. The light-shielding structure array 22 can be disposed on the surface of the sheet 21 away from the optical waveguide lens 1, or it can be disposed on the surface closer to the optical waveguide lens 1, without specific limitation here.

[0093] The first cross section is a cross section that passes through every point on the first axis L1 and intersects with the light-shielding structure array 22. The first cross section is parallel to the arrangement direction M of the grating in the turning grating region 12. "Passing through every point on the first axis L1" specifically means that the first cross section includes the first axis L1, that is, the first axis L1 is located on the first cross section.

[0094] In this embodiment of the application, the lens 100 is configured such that a light-shielding sheet 2 is provided on the first side of the optical waveguide lens 1, and at least a portion of the light-shielding structure array 22 is provided in the first region 211. Thus, as... Figure 13 As shown, when ambient light shines on the light-shielding structure array 22, the light-shielding structure array 22 plays the role of "filtering" the light. That is, the light-transmitting gap 222 allows a portion of the incident light at the incident angle to pass through and illuminate the turning grating area 12, while the other portion of the incident light at the incident angle is blocked by the first light-shielding structure 221 on both sides of the light-transmitting gap 222. In this way, by designing the structural parameters (such as spacing, height, tilt angle, etc.) of the first light-shielding structure 221 in the light-shielding structure array 22, the incident angle range of the incident light illuminating the turning grating area 12 can be controlled, so as to block the incident light that can produce rainbow patterns, thereby eliminating the rainbow pattern and reducing the adverse effect of the rainbow pattern on the wearer's vision, thus improving the wearer's user experience.

[0095] In addition, the embodiments of this application achieve the effect of eliminating rainbow patterns by adding a light-shielding plate 2 to the optical waveguide lens 1. This eliminates the need to improve the design of the grating area on the optical waveguide lens 1, thereby avoiding increasing the design and manufacturing costs of the grating area on the optical waveguide lens 1.

[0096] It is important to understand that "incident light / ambient light capable of producing rainbow patterns" specifically refers to the incident light / ambient light that, after passing through the grating area, produces a dispersive beam that can illuminate the wearer's eyes, thereby creating rainbow patterns in the wearer's field of vision.

[0097] In some embodiments, such as Figure 12 and Figure 13 As shown, the incident light through the light-transmitting gap 222 includes a first incident light 31 and a second incident light 32. The first incident light 31 originates from the side of the light-transmitting gap 222 closest to the first axis L1 (i.e., Figure 12 , Figure 13 The second incident light 32 is incident from the left side of the light-transmitting gap 222 (i.e., the light is incident from the left side of the light-transmitting gap 222 away from the first axis L1). Figure 12 , Figure 13The light is incident on the right side of the light-transmitting gap 222. The minimum incident angle of the first incident light 31 blocked by the light-blocking structure array 22 is θ1, and the minimum incident angle of the second incident light 32 blocked by the light-blocking structure array 22 is θ2; θ1 and θ2 satisfy: θ1 < θ2. This setup, as shown... Figure 12 As shown, the light-transmitting gap 222 allows the second incident light 32 with a larger incident angle to pass through the light-transmitting gap 222 and shine into the eye, reducing the obstruction of the second incident light 32 with a larger incident angle by the light-shielding structure array 22, thereby reducing the influence of the light-shielding structure array 22 on the wearer's field of vision.

[0098] Among them, such as Figure 4a , Figure 4b and Figure 13 As shown, the minimum incident angle θ1 of the first incident light 31 should be less than or equal to β1, and the minimum incident angle θ2 of the second incident light 32 should be less than or equal to β2. This ensures that the light-shielding structure array 22 can block the incident light that produces the rainbow pattern, thereby greatly reducing the intensity of the rainbow pattern. Figure 4a , Figure 4b As shown, parameters β1, β2, β3, β4, γ1, γ2, γ3, and γ4 can be obtained through the grating equation. Here, γ1 and γ3 are the minimum angle at which the dispersive beam can enter the wearer's eye (this angle can be the angle between the blue light in the dispersive beam and the 100° normal of the lens), and γ2 and γ4 are the maximum angle at which the dispersive beam can enter the wearer's eye. For example, as... Figure 4a As shown, considering the positions of the wearer's eyes and the ambient light source relative to the lens (100°), β1 = 65°, γ1 = -47°, and γ2 = -62° can be calculated. For example, as... Figure 4b As shown, by combining the position of the wearer's eyes and the ambient light source relative to the lens 100, β2 = 75° can be calculated.

[0099] In some embodiments, such as Figure 13 As shown, θ1 satisfies: 60°≤θ1≤65°, for example, θ1 can be 65°. This setting avoids θ1 being too large or too small. If θ1 is too small, the light-blocking structure array 22 may easily miss some of the first incident light 31 that can produce rainbow patterns, which is detrimental to the elimination of rainbow patterns. If θ1 is too large, the light-blocking structure array 22 may easily block the first incident light 31 at other incident angles, affecting the transmittance of the lens 100. By setting the range of θ1 to 60°≤θ1≤65°, the light-blocking structure array 22 is less likely to miss some of the first incident light 31 that can produce rainbow patterns, and at the same time, it reduces the impact on the transmittance of the lens 100.

[0100] In some embodiments, such as Figure 13As shown, θ2 satisfies: 70°≤θ2≤75°, for example, θ2 can be 75°. This setting avoids θ2 being too large or too small. If θ2 is too small, the light-blocking structure array 22 may easily miss some of the second incident light 32 that can produce rainbow patterns, which is detrimental to reducing the elimination of rainbow patterns. If θ2 is too large, the light-blocking structure array 22 may easily block the second incident light 32 at other incident angles, affecting the transmittance of the lens 100. By setting the range of θ2 to 70°≤θ2≤75°, the light-blocking structure array 22 is less likely to miss some of the second incident light 32 that can produce rainbow patterns, while also reducing the impact on the transmittance of the lens 100.

[0101] like Figure 14 As shown, Figure 14 It shows Figure 8 The graph shows the relationship between the incident angle of ambient light and transmittance at the first region 211 of lens 100. The horizontal axis represents the incident angle of the incident light, and the vertical axis represents transmittance. A positive incident angle indicates that the ambient incident light deviates from the normal of lens 100 in a counterclockwise direction, while a negative incident angle indicates that the ambient incident light deviates from the normal of lens 100 in a clockwise direction. The ambient incident light with a positive incident angle can be the first incident light 31, and the ambient incident light with a negative incident angle can be the second incident light 32. Figure 14 It can be seen that ambient incident light with incident angles in the range of [-70°, -100°] and [65°, 100°] is completely blocked by the light-blocking structure array 22, with a transmittance of 0; ambient incident light with incident angles in the range of [-70°, 65°] can pass through the lens 100, with a transmittance between 0 and 0.8.

[0102] The structure of the first light-shielding structure 221 that can achieve θ1 < θ2 is not unique. In some embodiments, the first light-shielding structure 221 can be configured as a side-tilted structure, specifically as follows: Figure 12 and Figure 13 As shown, within the first cross-section, the first light-shielding structure 221 has two oppositely arranged side surfaces 2211. The side surfaces 2211 are inclined relative to the first axis L1, and are arranged along the first axis L1 in a direction from the second side of the optical waveguide lens 1 to the first side (e.g., ...). Figure 12 and Figure 13 (From bottom to top) The distance from side 2211 to the first axis L1 gradually increases. That is, the top of side 2211 deviates from the bottom of side 2211 to the side away from the first axis L1. The top of side 2211 is the end of side 2211 away from the sheet 21, and the bottom of side 2211 is the end of side 2211 closer to the sheet 21.

[0103] In this embodiment, by setting the first light-blocking structure 221 to a side-tilted structure, the light-transmitting gap 222 can be tilted to the side away from the first axis L1. In this way, the light-transmitting gap 222 can better match the wearer's field of vision, reduce the obstruction of the wearer's line of sight by the first light-blocking structure 221, and thereby improve the transmittance of the lens 100 at the corresponding wearer's line of sight position.

[0104] In some embodiments, such as Figure 13 As shown, within the first cross-section, the first light-shielding structure 221 is shaped like a parallelogram, with the two side surfaces 2211 being the two hypotenuses of the parallelogram, and the top surface 2212 of the first light-shielding structure 221 being the upper base of the parallelogram. In other embodiments, within the first cross-section, the first light-shielding structure 221 may also be triangular, with the two side surfaces 2211 being the two hypotenuses of the triangle.

[0105] like Figure 13 As shown, in the first light-shielding structure 221, the tilt angle α of the side 2211 relative to the first axis L1 is an important parameter. The tilt angle α should not be set too small. If the tilt angle α is too small, the first light-shielding structure 221 will easily obstruct the wearer's line of sight, thus easily affecting the wearer's field of vision. By setting the tilt angle α of the side 2211 to be greater than or equal to 25°, the obstruction of the wearer's line of sight by the first light-shielding structure 221 can be reduced, thereby reducing the influence of the light-shielding structure array 22 on the wearer's field of vision.

[0106] In addition to being configured as a side-inclined structure, the first light-shielding structure 221 can also be configured as a top-inclined structure, as described below: the two sides 2211 of the first light-shielding structure 221 are parallel to the first axis L1, the top surface 2212 of the first light-shielding structure 221 is inclined relative to the first axis L1, and the right end of the top surface 2212 (i.e. the end away from the first axis L1) is raised relative to the left end (i.e. the end closer to the first axis L1).

[0107] In some embodiments, such as Figure 13 As shown, within the first cross-section, the bottom width of the first light-shielding structure 221 is d1, and the bottom width of the light-transmitting gap 222 is d2. The bottom of the first light-shielding structure 221 is the end closest to the sheet 21, and the bottom of the light-transmitting gap 222 is the end closest to the sheet 21. d1 and d2 satisfy: 1 ​​≤ d2 / d1 ≤ 5. For example, d2 / d1 can be 4, d2 = 4 μm, and d1 = 1 μm.

[0108] This configuration avoids d2 / d1 being too large or too small. If d2 / d1 is too small, the first light-blocking structure 221 may block incident light from a greater angle, potentially affecting the transmittance of the lens 100. If d2 / d1 is too large, the light-blocking structure array 22 may miss some of the first incident light 31 and second incident light 32 that can produce rainbow patterns, which is detrimental to the elimination of rainbow patterns. By setting d2 / d1 to 1 ≤ d2 / d1 ≤ 5, both the transmittance of the lens 100 and the effect of eliminating rainbow patterns can be guaranteed.

[0109] In some embodiments, such as Figure 13 As shown, the height of the first light-shielding structure 221 is h, and h and d2 satisfy: 1 ​​≤ d2 / h ≤ 5. For example, d2 / h can be 3.33, d2 = 4 μm, and h = 1.2 μm. This setting avoids d2 / h being too large or too small. If d2 / h is too large, the light-shielding structure array 22 may miss some of the first incident light 31 and the second incident light 32 that can produce rainbow patterns, which is detrimental to the elimination of rainbow patterns. If d2 / h is too small, the first light-shielding structure 221 may block incident light at more angles, which may affect the transmittance of the lens 100. By setting d2 / h to 1 ≤ d2 / h ≤ 5, both the transmittance of the lens 100 and the effect of eliminating rainbow patterns can be guaranteed.

[0110] To reduce the impact of the light-shielding structure array 22 on the overall transmittance of the lens 100, in some embodiments, such as Figure 8 and Figure 9 As shown, the light-shielding structure array 22 is disposed in the first region 211, that is, the light-shielding structure array 22 is disposed in a part of the lens body 21. In this way, the light-shielding structure array 22 does not affect the transmittance of the lens 100 in other regions outside the first region 211, thereby reducing the impact of the light-shielding structure array 22 on the overall transmittance of the lens 100.

[0111] To reduce the impact of the light-shielding structure array 22 on the transmittance of the lens 100 at the first region 211, in some embodiments, such as Figure 8 and Figure 10 As shown, the first light-shielding structure 221 is a strip structure and is arranged along the arrangement direction M of the gratings in the transition grating region 12. The length direction N of the first light-shielding structure 221 is perpendicular to the arrangement direction M of the gratings in the transition grating region 12, that is, the length direction N of the first light-shielding structure 221 is perpendicular to the arrangement direction of the first light-shielding structure 221. With this arrangement, the light-transmitting gap 222 can be parallel to the grating slit in the transition grating region 12. This can reduce the obstruction of incident light directed towards the grating slit by the light-transmitting gap 222, thereby reducing the influence of the light-shielding structure array 22 on the transmittance of the lens 100 at the first region 211.

[0112] Of course, the length direction N of the first light-shielding structure 221 is not limited to being perpendicular to the arrangement direction M of the grating. The length direction N of the first light-shielding structure 221 can also have a certain angle with the arrangement direction M of the grating. This angle can be within 40°, such as 5°, 10°, 20°, 30°, 40°, etc.

[0113] To better illustrate the effect of the light-shielding plate 2 on eliminating rainbow patterns, the following comparison shows the rainbow pattern elimination effect of a lens 100 with the light-shielding plate 2 and a lens 100 without the light-shielding plate 2.

[0114] θ1 <![CDATA[The intensity ratio η0 of the dispersed light beam of the light-shielding sheet 2 is not set]]> <![CDATA[Set the intensity ratio η1 of the dispersive beam of the light shield 2]]> 65 5.6％ 0.537％ 75 4.3％ 0.18％ 85 2.3％ 0.129％ 89 0.9％ 0.086％

[0115] The intensity ratio of the dispersed beam is the percentage of the intensity of the dispersed beam to the intensity of the incident beam. The greater the intensity ratio of the dispersed beam, the greater the intensity of the rainbow pattern produced by the dispersed beam entering the human eye; the smaller the intensity ratio of the dispersed beam, the smaller the intensity of the rainbow pattern produced by the dispersed beam entering the human eye.

[0116] As can be seen from the data in the table above, by setting the light shield 2, the intensity ratio of the dispersed beam generated by the first incident light 31 at different incident angles is greatly reduced. Therefore, the light shield 2 has a better rainbow effect.

[0117] Figure 15 This is a longitudinal cross-sectional view of the lens 100 in the second embodiment of this application. Figure 16 for Figure 15 The image shows a magnified view of the edge region of the lens 100. Figure 15 , Figure 16 The lens 100 shown is Figures 8 to 13 The main difference between the lens 100 shown is that the light-shielding plates 2 are arranged differently. The light-shielding plates 2 are respectively arranged on opposite sides of the optical waveguide lens 1, as described below:

[0118] In some embodiments, such as Figure 15 and Figure 16 As shown, light-shielding sheets 2 are stacked on both the first and second sides of the optical waveguide lens 1. This arrangement allows the light-shielding sheets 2 to not only block incident light from the first side of the optical waveguide lens 1, preventing the transmitted diffracted light formed after the incident light from the first side irradiates the transition grating region 12 from entering the wearer's eyes and forming rainbow patterns; but also to block incident light from the second side of the optical waveguide lens 1, preventing the reflected diffracted light formed after the incident light from the second side irradiates the transition grating region 12 from entering the wearer's eyes and forming rainbow patterns, thereby greatly improving the rainbow pattern elimination effect.

[0119] Among them, such as Figure 15As shown, the light-shielding sheets 2 located on the first and second sides of the optical waveguide lens 1 are bonded to the edge of the optical waveguide lens 1 through the adhesive layer 5.

[0120] In some embodiments, such as Figure 15 and Figure 16 As shown, within the first cross-section, the first light-shielding structure 221 has two oppositely arranged side surfaces 2211. The side surfaces 2211 are inclined relative to the first axis L1, and are arranged along the first axis L1 in a direction from the second side of the optical waveguide lens 1 to the first side (e.g., ...). Figure 12 and Figure 13 (From bottom to top) The distance from the side 2211 to the first axis L1 gradually increases.

[0121] That is: for the light-shielding plate 2 disposed on the first side of the optical waveguide lens 1, the side 2211 of the first light-shielding structure 221 is inclined relative to the first axis L1, and the top of the side 2211 is offset from the bottom of the side 2211 to the side away from the first axis L1; for the light-shielding plate 2 disposed on the second side of the optical waveguide lens 1, the side 2211 of the first light-shielding structure 221 is inclined relative to the first axis L1, and the top of the side 2211 is offset from the bottom of the side 2211 to the side closer to the first axis L1.

[0122] With this configuration, the light-transmitting gaps of the light-shielding plates 2 on both sides of the optical waveguide lens 1 are both tilted, and the tilting direction is consistent. Thus, if... Figure 15 As shown, the light-transmitting gap 222 of the light-blocking plate 2 can better match the wearer's field of vision, reduce the obstruction of the wearer's vision by the first light-blocking structure 221, and thus help improve the transmittance of the lens 100 at the corresponding wearer's line of vision position.

[0123] Specifically, for the light-shielding sheet 2 located on the second side of the optical waveguide lens 1, the specific location of the light-shielding structure array 22, the arrangement of the first light-shielding structure 221, and other parameters (such as d1, d2, h, α, etc.) can be found in [reference needed]. Figures 8 to 13 The light-shielding sheet 2 shown in the first embodiment is used for setting, and will not be described again here.

[0124] Figure 17 This is a schematic diagram of the structure of the lens 100 in the third embodiment of this application. Figure 18 for Figure 17 CC section view of lens 100 in the middle. Figure 19 for Figure 18 The image shows a magnified view of the edge region of the lens 100. Figures 17-19 The lens 100 shown is Figures 8 to 13The main difference between the lens 100 shown is that the structure of the light-shielding structure array 22 is different. In the lens 100 of the third embodiment, the light-shielding structure array 22 is a circular array + arc array structure, as described below:

[0125] In some embodiments, such as Figure 17 and Figure 18 As shown, in the light-shielding structure array 22, multiple first light-shielding structures 221 are arranged along a direction perpendicular to the first axis L1. Each first light-shielding structure 221 is a curved structure and is set around the first axis L1. By setting the first light-shielding structure 221 as a curved structure set around the first axis L1, the light transmission gap 222 can also be curved and set around the first axis L1. In this way, the light transmission gap 222 can better match the wearer's field of vision in the circumferential direction of the lens 100, reducing the obstruction of the wearer's vision by the first light-shielding structure 221, thereby making the lens 100 have similar transmittance at different positions in the circumferential direction.

[0126] The first light-shielding structure 221 can be in various curved shapes. In some embodiments, the first light-shielding structure 221 can be a ring structure or an arc structure, specifically as follows: Figure 17 As shown, in the light-shielding structure array 22, a portion of the first light-shielding structures 221 are annular structures arranged to form an annular array 22a; another portion of the first light-shielding structures 221 are arc-shaped structures arranged to form an arc array 22b. The arc array 22b is located on the periphery of the annular array 22a, and at least a portion of it is located in the first region 211. This arrangement allows the light-transmitting gap 222 to be annular or arc-shaped, so that the light-transmitting gap 222 can better match the wearer's field of vision (the field of vision is conical) in the circumferential direction of the lens 100. This can better reduce the obstruction of the wearer's vision by the first light-shielding structures 221, thereby allowing the lens 100 to have a more similar transmittance at different positions in the circumferential direction.

[0127] In addition to being a circular ring structure or an arc structure, in some other embodiments, the first light-shielding structure 221 can also be an elliptical ring or an elliptical arc structure, as follows: In the light-shielding structure array 22, a portion of the first light-shielding structures 221 are elliptical ring structures and are arranged to form an elliptical ring array, the major axis of the elliptical ring array being parallel to the width direction X of the lens 100; another portion of the first light-shielding structures 221 are elliptical arc (part of an elliptical curve) structures and are arranged to form an elliptical arc array, the elliptical arc array being located on the periphery of the elliptical ring array, and at least a portion of them being disposed in the first region 211.

[0128] In some embodiments, such as Figure 18As shown, the lens body 21 includes a first lens body surface 21a and a second lens body surface 21b arranged opposite to each other. A light-blocking structure array 22 is distributed across the entire surface of the first lens body surface 21a, meaning the light-blocking structure array 22 covers the entire first lens body surface 21a. This arrangement reduces the difference in transmittance between different areas of the lens 100, resulting in a more uniform transmittance across the entire lens 100, which improves the wearer's experience. Simultaneously, the distribution of the light-blocking structure array 22 across the entire surface of the first lens body surface 21a makes the lens 100 appear darker overall, providing a sun-blocking effect similar to sunglasses.

[0129] Of course, the light-shielding structure array 22 can also cover a portion of the surface 21a of the first sheet, for example... Figure 17 As shown, a portion of the surface 21a of the first sheet is covered by the light-shielding structure array 22, while another portion is not covered by the light-shielding structure array 22. The portion not covered by the light-shielding structure array 22 includes the third region 213 of the sheet 21, which is the orthographic projection of the coupled grating region 11 onto the sheet 21.

[0130] In some embodiments, such as Figure 18 and Figure 19 As shown, the minimum incident angle of the first incident light 31 blocked by the light-shielding structure array 22 is θ1, and the minimum incident angle of the second incident light 32 blocked by the light-shielding structure array 22 is θ2; θ1 and θ2 satisfy: θ1 < θ2. With this configuration, as... Figure 19 As shown, the light-transmitting gap 222 allows the second incident light 32 with a larger incident angle to pass through the light-transmitting gap 222 and shine into the eye, reducing the obstruction of the second incident light 32 with a larger incident angle by the light-shielding structure array 22, thereby reducing the influence of the light-shielding structure array 22 on the wearer's field of vision.

[0131] In some embodiments, such as Figure 19 As shown, θ1 satisfies: 60°≤θ1≤65°, for example, θ1 can be 65°. With this setting, the light-shielding structure array 22 is less likely to miss a portion of the first incident light 31 that can produce rainbow patterns, while also reducing the impact on the light transmittance of the lens 100.

[0132] In some embodiments, such as Figure 19 As shown, θ2 satisfies: 70°≤θ2≤75°, for example, θ2 can be 75°. With this setting, the light-shielding structure array 22 is less likely to miss a portion of the second incident light 32 that can produce rainbow patterns, while also reducing the impact on the light transmittance of the lens 100.

[0133] In some embodiments, such as Figure 17 , Figure 18 and Figure 19 As shown, within the first cross-section (e.g.) Figure 17 The first light-shielding structure 221 has two opposite sides 2211, which are inclined relative to the first axis L1 and are oriented along the first axis L1 from the second side of the optical waveguide lens 1 to the first side (e.g., the CC section). Figure 18 and Figure 19 (From bottom to top) The distance from the side 2211 to the first axis L1 gradually increases. That is, the top of the side 2211 deviates from the bottom of the side 2211 away from the first axis L1. This arrangement allows the light-transmitting gap 222 to tilt away from the first axis L1, so that the light-transmitting gap 222 can better match the wearer's field of vision in the radial direction of the lens 100, reducing the obstruction of the wearer's vision by the first light-blocking structure 221. This results in the lens 100 having similar transmittance at different positions in the radial direction, thereby reducing adverse visual effects on the wearer.

[0134] In some embodiments, such as Figure 18 and Figure 19 As shown, along the direction away from the first axis L1, the tilt angle of the side 2211 of the first light-blocking structure 221 in the light-blocking structure array 22 relative to the first axis L1 increases progressively. It is important to understand that "progressively" specifically refers to the first light-blocking structure 221; that is, for two adjacent first light-blocking structures 221, the side 2211 of the first light-blocking structure 221 farther from the first axis L1 has a greater tilt angle than the side 2211 of the first light-blocking structure 221 closer to the first axis L1. The tilt angles of the two side 2211 of the same first light-blocking structure 221 can be equal or unequal. This arrangement allows the tilt angle of the light-transmitting gap 222 to gradually increase along the direction away from the first axis L1. This allows the light-transmitting gap 222 to better match the wearer's field of vision in the radial direction of the lens 100, reducing the obstruction of the wearer's view by the first light-blocking structure 221. This results in the lens 100 having more similar transmittance at different positions in the radial direction, further reducing adverse visual effects on the wearer.

[0135] In some embodiments, such as Figure 19 As shown, for the first light-shielding structure 221 located in the first region 211, the tilt angle α of the side 2211 relative to the first axis L1 is greater than or equal to 25°. This configuration reduces the obstruction of the second incident light 32 with a larger incident angle by the first light-shielding structure 221, thereby reducing the influence of the light-shielding structure array 22 on the wearer's field of view.

[0136] In some embodiments, such as Figure 17 and Figure 18As shown, the light-shielding structure array 22 also includes a second light-shielding structure 223, which is disposed at the position of the first axis L1. The height direction of the second light-shielding structure 223 is parallel to the extension direction Z of the first axis L1. The second light-shielding structure 223 can be a cylindrical structure.

[0137] like Figure 20 As shown, Figure 20 (a) in the middle shows Figure 18 The graph shows the relationship between the incident angle of ambient light and the transmittance at the left edge of lens 100. Figure 20 (b) in the middle shows Figure 18 The graph showing the relationship between the incident angle of ambient incident light and the transmittance at the first axis L1 for lens 100. Figure 20 (c) in the middle shows Figure 18 The graph shows the relationship between the incident angle of ambient light and transmittance at the right edge of lens 100. The horizontal axis represents the incident angle of the incident light, and the vertical axis represents transmittance. A positive incident angle indicates that the ambient incident light deviates from the normal of lens 100 in a counter-clockwise direction, while a negative incident angle indicates that the ambient incident light deviates from the normal of lens 100 in a clockwise direction. A positive incident angle can be the first incident light 31, and a negative incident angle can be the second incident light 32.

[0138] Depend on Figure 20 As shown in (a), ambient incident light with incident angles in the range of [-70°, -100°] and [75°, 100°] is completely blocked by the light-shielding structure array 22, and the transmittance is 0; ambient incident light with incident angles in the range of [-70°, 75°] can pass through the lens 100, and the transmittance is between 0 and 0.8.

[0139] Depend on Figure 20 As can be seen from (b) in the figure, ambient incident light with incident angles in the range of [-75°, -100°] and [75°, 100°] is completely blocked by the light-blocking structure array 22, and the transmittance is 0; ambient incident light with incident angles in the range of [-75°, 75°] can pass through the lens 100, and the transmittance is between 0 and 0.8.

[0140] Depend on Figure 20 As can be seen from (c), ambient incident light with incident angles in the range of [-75°, -100°] and [70°, 100°] is completely blocked by the light-blocking structure array 22, and the transmittance is 0; ambient incident light with incident angles in the range of [-75°, 70°] can pass through the lens 100, and the transmittance is between 0 and 0.8.

[0141] Regarding the cross-sectional shape and other structural parameters of the first light-shielding structure 221 in the third embodiment of this application, such as d1, d2, h, etc., please refer to [reference needed]. Figures 8 to 13 The light-shielding sheet 2 shown in the first embodiment is used, which will not be described in detail here.

[0142] Figure 21 This is a schematic diagram of the structure of the lens 100 in the fourth embodiment of this application. Figure 22 for Figure 21 DD cross-section of lens 100 in the middle. Figure 23 for Figure 22 The image shows a magnified view of the edge region of the lens 100. Figures 21-23 The lens 100 shown is Figures 17-19 The main difference between the lens 100 shown is that the light-shielding plates 2 are arranged differently. The light-shielding plates 2 are respectively arranged on opposite sides of the optical waveguide lens 1, as described below:

[0143] In some embodiments, such as Figure 21 and Figure 22 As shown, light-shielding sheets 2 are stacked on both the first and second sides of the optical waveguide lens 1. This arrangement allows the light-shielding sheets 2 to not only block incident light from the first side of the optical waveguide lens 1, preventing the transmitted diffracted light formed after the incident light from the first side irradiates the transition grating region 12 from entering the wearer's eyes and forming rainbow patterns; but also to block incident light from the second side of the optical waveguide lens 1, preventing the reflected diffracted light formed after the incident light from the second side irradiates the transition grating region 12 from entering the wearer's eyes and forming rainbow patterns, thereby greatly improving the rainbow pattern elimination effect.

[0144] In some embodiments, such as Figure 21 , Figure 22 and Figure 23 As shown, within the first cross-section (e.g.) Figure 21 The first light-shielding structure 221 has two opposite sides 2211, which are inclined relative to the first axis L1 and are oriented along the first axis L1 from the second side of the optical waveguide lens 1 to the first side (e.g., the DD section). Figure 22 and Figure 23 (From bottom to top) The distance from the side 2211 to the first axis L1 gradually increases.

[0145] That is: for the light-shielding plate 2 disposed on the first side of the optical waveguide lens 1, the side 2211 of the first light-shielding structure 221 is inclined relative to the first axis L1, and the top of the side 2211 is offset from the bottom of the side 2211 to the side away from the first axis L1; for the light-shielding plate 2 disposed on the second side of the optical waveguide lens 1, the side 2211 of the first light-shielding structure 221 is inclined relative to the first axis L1, and the top of the side 2211 is offset from the bottom of the side 2211 to the side closer to the first axis L1.

[0146] With this configuration, the light-transmitting gaps of the light-shielding plates 2 on both sides of the optical waveguide lens 1 are both tilted, and the tilting direction is consistent. Thus, if... Figure 22 As shown, the light-transmitting gap 222 of the light-blocking plate 2 can better match the wearer's field of vision, reduce the obstruction of the wearer's vision by the first light-blocking structure 221, and thus help improve the transmittance of the lens 100 at the corresponding wearer's line of vision position.

[0147] The specific details regarding the placement of the light-shielding structure array 22, the arrangement of the first light-shielding structure 221, and related parameters (such as d1, d2, h, α, θ1, θ2, etc.) can be found in [reference needed]. Figures 17-19 The light-shielding sheet 2 shown in the third embodiment is used for setting, which will not be described in detail here.

[0148] like Figure 24 As shown, Figure 24 (a) in the middle shows Figure 22 The graph shows the relationship between the incident angle of ambient light and the transmittance at the left edge of lens 100. Figure 24 (b) in the middle shows Figure 22 The graph showing the relationship between the incident angle of ambient incident light and the transmittance at the first axis L1 for lens 100. Figure 24 (c) in the middle shows Figure 22 The graph shows the relationship between the incident angle of ambient light and transmittance at the right edge of lens 100. The horizontal axis represents the incident angle of the incident light, and the vertical axis represents transmittance. A positive incident angle indicates that the ambient incident light deviates from the normal of lens 100 in a counter-clockwise direction, while a negative incident angle indicates that the ambient incident light deviates from the normal of lens 100 in a clockwise direction. A positive incident angle can be the first incident light 31, and a negative incident angle can be the second incident light 32.

[0149] Depend on Figure 24 As shown in (a), ambient incident light with incident angles in the range of [-70°, -100°] and [75°, 100°] is completely blocked by the light-shielding structure array 22, and the transmittance is 0; ambient incident light with incident angles in the range of [-70°, 75°] can pass through the lens 100, and the transmittance is between 0 and 0.8.

[0150] Depend on Figure 24 As can be seen from (b) in the figure, ambient incident light with incident angles in the range of [-75°, -100°] and [75°, 100°] is completely blocked by the light-blocking structure array 22, and the transmittance is 0; ambient incident light with incident angles in the range of [-75°, 75°] can pass through the lens 100, and the transmittance is between 0 and 0.8.

[0151] Depend on Figure 24 As can be seen from (c), ambient incident light with incident angles in the range of [-75°, -100°] and [70°, 100°] is completely blocked by the light-blocking structure array 22, and the transmittance is 0; ambient incident light with incident angles in the range of [-75°, 70°] can pass through the lens 100, and the transmittance is between 0 and 0.8.

[0152] The cross-sectional lines in the accompanying drawings of this application are used to distinguish different components and should not be construed as limiting the materials of the components. The accompanying drawings of this application are not shown to scale of the actual product in order to clearly illustrate microstructures such as light-shielding structure arrays.

[0153] While the description of this application is presented in conjunction with some embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may arise based on the claims of this application. To provide a thorough understanding of this application, many specific details are included in the above description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0154] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0155] In the embodiments of this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0156] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The directional terms mentioned in the embodiments of this application, such as "upper," "lower," "left," "right," "inner," and "outer," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. "Multiple" refers to at least two.

[0157] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0158] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A lens for use in smart glasses, characterized in that, It includes an optical waveguide lens (1) and a light shield (2). The optical waveguide lens (1) has a first side and a second side opposite to each other. The light shield (2) is stacked on at least the first side of the optical waveguide lens (1). The optical waveguide lens (1) has an insertion grating region (11), a deflection grating region (12), and an output grating region (13). The deflection grating region (12) is used to deflect the first beam coupled into the optical waveguide lens (1) by the insertion grating region (11) to the output grating region (13). The output grating region (13) is used to couple the first beam out to the second side of the optical waveguide lens (1). The light-shielding sheet (2) includes a light-transmitting sheet (21) and a light-shielding structure array (22) disposed on the sheet (21). At least a portion of the light-shielding structure array (22) is disposed in a first region (211) of the sheet (21), and the first region (211) is the orthographic projection of the turning grating region (12) on the sheet (21). The light-shielding structure array (22) includes a plurality of first light-shielding structures (221). In the first cross section, the plurality of first light-shielding structures (221) are arranged side by side, and there is a light-transmitting gap (222) between two adjacent first light-shielding structures (221). Wherein, the first cross section is a cross section that passes through each point on the first axis (L1) of the sheet (21) and intersects with the light-shielding structure array (22), and the first cross section is parallel to the arrangement direction (M) of the grating in the turning grating region (12); The first axis (L1) intersects the first region (211) and is perpendicular to the width direction (X) and height direction (Y) of the sheet (21).

2. The lens according to claim 1, characterized in that, Within the first cross section, the first light-shielding structure (221) has two opposing sides (2211), which are inclined relative to the first axis (L1) and extend along the first axis (L1) from the second side of the optical waveguide lens (1) to the first side. The distance from the side (2211) to the first axis (L1) gradually increases.

3. The lens according to claim 2, characterized in that, For the first light-shielding structure (221) disposed in the first region (211), the inclination angle of the side (2211) relative to the first axis (L1) is greater than or equal to 25°.

4. The lens according to claim 2 or 3, characterized in that, Along a direction away from the first axis (L1), the tilt angle of the side (2211) of the first light-shielding structure (221) in the light-shielding structure array (22) relative to the first axis (L1) increases one by one.

5. The lens according to any one of claims 1 to 4, characterized in that, The light-shielding structure array (22) is disposed in the first region (211).

6. The lens according to claim 5, characterized in that, The first light-shielding structure (221) is a strip structure and is arranged along the arrangement direction (M) of the grating. The length direction (N) of the first light-shielding structure (221) is perpendicular to the arrangement direction (M) of the grating.

7. The lens according to any one of claims 1 to 4, characterized in that, In the light-shielding structure array (22), a plurality of first light-shielding structures (221) are arranged along a direction perpendicular to the first axis (L1), and each first light-shielding structure (221) is a curved structure and is arranged around the first axis (L1).

8. The lens according to claim 7, characterized in that, In the light-shielding structure array (22), a portion of the first light-shielding structures (221) are annular structures and are arranged to form an annular array (22a); another portion of the first light-shielding structures (221) are arc-shaped structures and are arranged to form an arc array (22b). The arc array (22b) is located on the periphery of the annular array (22a), and at least a portion of it is disposed in the first region (211).

9. The lens according to claim 7 or 8, characterized in that, The sheet (21) includes a first sheet surface (21a) and a second sheet surface (21b) arranged opposite to each other, and the light-shielding structure array (22) is distributed on the entire surface of the first sheet surface (21a).

10. The lens according to any one of claims 1 to 9, characterized in that, For the light-shielding plate (2) disposed on the first side of the optical waveguide lens (1), the incident light of the light-transmitting gap (222) includes a first incident light (31) and a second incident light (32). The first incident light (31) is incident on the light-transmitting gap (222) from the side of the light-transmitting gap (222) close to the first axis (L1), and the second incident light (32) is incident on the light-transmitting gap (222) from the side of the light-transmitting gap (222) away from the first axis (L1). The minimum incident angle of the first incident light (31) blocked by the light-shielding structure array (22) is θ1, and the minimum incident angle of the second incident light (32) blocked by the light-shielding structure array (22) is θ2; θ1 and θ2 satisfy: θ1 < θ2.

11. The lens according to claim 10, characterized in that, θ1 satisfies: 60°≤θ1≤65°, and / or θ2 satisfies: 70°≤θ2≤75°.

12. The lens according to any one of claims 1 to 11, characterized in that, The light-shielding sheet (2) is stacked on both the first and second sides of the optical waveguide lens (1).

13. The lens according to any one of claims 1 to 12, characterized in that, Within the first cross section, the bottom width of the first light-shielding structure (221) is d1, the bottom width of the light-transmitting gap (222) is d2, and the height of the first light-shielding structure (221) is h; d1 and d2 satisfy: 1≤d2 / d1≤5; and / or h and d2 satisfy: 1≤d2 / h≤5.

14. A type of smart glasses, characterized in that, The lens includes a frame (200), an optical engine (300), and a lens (100) according to any one of claims 1 to 13. The lens (100) and the optical engine (300) are both mounted on the frame (200), and the light outlet of the optical engine (300) faces the coupling grating region (11) of the lens (100).

15. A light-shielding sheet, characterized in that, For use in stacking with the optical waveguide lens (1) of smart glasses, it includes a light-transmitting sheet (21) and a light-shielding structure array (22) disposed on the sheet (21); The sheet (21) has a first region (211) and a second region (212), the first region (211) being opposite to the turning grating region (12) of the optical waveguide lens (1), and the second region (212) being opposite to the coupling grating region (13) of the optical waveguide lens (1); at least a portion of the light-shielding structure array (22) is disposed in the first region (211); The light-shielding structure array (22) includes a plurality of first light-shielding structures (221). In the first cross section, the plurality of first light-shielding structures (221) are arranged side by side, and there is a light-transmitting gap (222) between two adjacent first light-shielding structures (221). Wherein, the first cross section is a cross section that passes through each point on the first axis (L1) of the sheet (21) and intersects with the light-shielding structure array (22); the first axis (L1) intersects with the second region (212) and is perpendicular to the width direction (X) and the height direction (Y) of the sheet (21).

16. The light-shielding sheet according to claim 15, characterized in that, Within the first cross section, the first light-shielding structure (221) has two oppositely arranged side surfaces (2211), which are inclined relative to the first axis (L1), and the top of the side surface (2211) is offset from the bottom of the side surface (2211) to the side away from the first axis (L1).

17. The light-shielding sheet according to claim 15, characterized in that, Within the first cross section, the first light-shielding structure (221) has two oppositely arranged side surfaces (2211), which are inclined relative to the first axis (L1), and the top of the side surface (2211) is offset from the bottom of the side surface (2211) towards the side closer to the first axis (L1).

18. The light-shielding sheet according to claim 16 or 17, characterized in that, For the first light-shielding structure (221) disposed in the first region (211), the inclination angle of the side (2211) relative to the first axis (L1) is greater than or equal to 25°.

19. The light-shielding sheet according to claim 16 or 17, characterized in that, Along a direction away from the first axis (L1), the tilt angle of the side (2211) of the first light-shielding structure (221) in the light-shielding structure array (22) relative to the first axis (L1) increases one by one.

20. The light-shielding sheet according to claim 15 or 16, characterized in that, The incident light in the light-transmitting gap (222) includes a first incident light (31) and a second incident light (32). The first incident light (31) is incident on the light-transmitting gap (222) from the side of the light-transmitting gap (222) close to the first axis (L1), and the second incident light (32) is incident on the light-transmitting gap (222) from the side of the light-transmitting gap (222) away from the first axis (L1). The minimum incident angle of the first incident light (31) blocked by the light-shielding structure array (22) is θ1, and the minimum incident angle of the second incident light (32) blocked by the light-shielding structure array (22) is θ2; θ1 and θ2 satisfy: θ1 < θ2.

21. The light-shielding sheet according to claim 20, characterized in that, θ1 satisfies: 60°≤θ1≤65°, and / or θ2 satisfies: 70°≤θ2≤75°.

22. The light-shielding sheet according to any one of claims 15 to 21, characterized in that, The light-shielding structure array (22) is disposed in the first region (211).

23. The light-shielding sheet according to claim 22, characterized in that, The first light-shielding structure (221) is a strip structure and is inclined relative to the width direction (X) of the sheet (21), and the arrangement direction (M) of the first light-shielding structure (221) is perpendicular to the length direction (N) of the first light-shielding structure (221).

24. The light-shielding sheet according to any one of claims 15 to 21, characterized in that, In the light-shielding structure array (22), a plurality of first light-shielding structures (221) are arranged along a direction perpendicular to the first axis (L1), and each first light-shielding structure (221) is a curved structure and is arranged around the first axis (L1).

25. The light-shielding sheet according to claim 24, characterized in that, In the light-shielding structure array (22), a portion of the first light-shielding structures (221) are annular structures and are arranged to form an annular array (22a); another portion of the first light-shielding structures (221) are arc-shaped structures and are arranged to form an arc array (22b). The arc array (22b) is located on the periphery of the annular array (22a), and at least a portion of it is disposed in the first region (211).

26. The light-shielding sheet according to claim 24 or 25, characterized in that, The sheet (21) includes a first sheet surface (21a) and a second sheet surface (21b) arranged opposite to each other, and the light-shielding structure array (22) is distributed on the entire surface of the first sheet surface (21a).

27. The light-shielding sheet according to any one of claims 15 to 26, characterized in that, Within the first cross section, the bottom width of the first light-shielding structure (221) is d1, the bottom width of the light-transmitting gap (222) is d2, and the height of the first light-shielding structure (221) is h; d1 and d2 satisfy: 1≤d2 / d1≤5; and / or h and d2 satisfy: 1≤d2 / h≤5.

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