Optical structure, lens assembly and display device

Abstract

The invention provides an optical structure, a lens assembly and a display device. The optical structure comprises a lens assembly, the lens assembly comprises a lens and a transflective film, the lens comprises a first surface and a second surface, the first surface and the second surface are both non-planar, and the transflective film is located on the first surface. The optical structure further comprises a light-transmitting flat plate assembly, the light-transmitting flat plate assembly comprises a light-transmitting flat plate and a polarization reflection film, the polarization reflection film is located on the light-transmitting flat plate, the light-transmitting flat plate assembly is located on the side, away from the light-transmitting reflection film, of the lens, and the optical axis of the lens is perpendicular to the main surface of the light-transmitting flat plate. The lens assembly further comprises a phase delay film, the phase delay film is located between the polarization reflection film and the transflective film, and at least part of the lens is arranged between the phase delay film and the transflective film. According to the optical structure provided by the invention, the lens assembly comprising the lens and the phase delay film and the light-transmitting flat plate assembly comprising the light-transmitting flat plate and the polarization reflection film are arranged, so that the ghosting phenomenon can be reduced.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to an optical structure, a lens assembly, and a display device. Background Art

[0002] Virtual Reality (VR) technology allows users to experience the virtual world in an immersive way. Devices using VR technology include Fresnel lenses and ultra-short-focus folded optical paths (Pancake). The ultra-short-focus folded optical path greatly reduces the required distance between the near-eye display device and the human eye by folding the optical path, making the VR device thinner and lighter. Currently, VR technology is widely used in games, retail, education, and industry. Summary of the invention

[0003] Embodiments of the present disclosure provide an optical structure, a lens assembly, and a display device.

[0004] The embodiment of the present disclosure provides an optical structure, including: a lens assembly, including a lens and a transflective film, the lens including a first surface and a second surface, the first surface and the second surface are both non-planar, and the transflective film is located on the first surface. The optical structure also includes a light-transmitting flat plate assembly, the light-transmitting flat plate assembly includes a light-transmitting flat plate and a polarizing reflective film, the polarizing reflective film is located on the light-transmitting flat plate, the light-transmitting flat plate assembly is located on the side of the lens away from the transflective film, and the optical axis of the lens is perpendicular to the main surface of the light-transmitting flat plate; the lens assembly also includes a phase delay film, the phase delay film is located between the polarizing reflective film and the transflective film, and at least a portion of the lens is disposed between the phase delay film and the transflective film.

[0005] For example, according to an embodiment of the present disclosure, the phase delay film is adhered to the second surface of the lens.

[0006] For example, according to an embodiment of the present disclosure, the phase delay film is located inside the lens and is in direct contact with the lens.

[0007] For example, according to an embodiment of the present disclosure, the light-transmitting flat plate assembly further includes a polarizing transmission film, which is located on a side of the polarizing reflection film away from the phase delay film and is disposed on the light-transmitting flat plate.

[0008] For example, according to an embodiment of the present disclosure, the optical structure further includes: a phase compensation film located between the phase delay film and the polarized reflective film. The phase compensation film is located on the second surface, or on the light-transmitting flat plate, or inside the lens.

[0009] For example, according to an embodiment of the present disclosure, the light-transmitting plate includes at least one plate surface perpendicular to the optical axis of the lens, the at least one plate surface is a plane, and the polarizing reflective film is located on the at least one plate surface.

[0010] For example, according to an embodiment of the present disclosure, the optical structure also includes: a first anti-reflection film, located on the second surface of the lens, at least one film layer is arranged on the second surface, and the first anti-reflection film is the film layer closest to the light-transmitting flat plate assembly among the at least one film layer; a second anti-reflection film, located on the flat surface of the light-transmitting flat plate close to the lens, at least one film layer is arranged on the flat surface, and the second anti-reflection film is the film layer closest to the lens assembly among the at least one film layer; a third anti-reflection film, located on the flat surface of the light-transmitting flat plate away from the lens, at least one film layer is arranged on the flat surface, and the third anti-reflection film is the film layer farthest from the lens assembly among the at least one film layer.

[0011] For example, according to an embodiment of the present disclosure, the optical structure further includes: a phase compensation film, located between the phase delay film and the polarized reflective film. The phase delay film and the phase compensation film are both located on the second surface, and the first anti-reflection film is located on the surface of the phase compensation film away from the phase delay film; the light-transmitting plate assembly further includes a polarized transmission film, located on the side of the polarized reflective film away from the phase delay film, the polarized reflective film is located on the side of the light-transmitting plate away from the lens, the second anti-reflection film is located on the surface of the light-transmitting plate close to the lens, and the third anti-reflection film is located on the surface of the polarized transmission film away from the lens.

[0012] For example, according to an embodiment of the present disclosure, the optical structure further includes: a phase compensation film, located between the phase delay film and the polarized reflective film. The phase delay film is located on the second surface, the phase compensation film is located on the light-transmitting plate, and the first anti-reflection film is located on the surface of the phase delay film away from the light-transmitting film; the light-transmitting plate assembly further includes a polarized transmission film, located on a side of the polarized reflective film away from the phase delay film, the polarized reflective film is located on a side of the light-transmitting plate away from the lens, the second anti-reflection film is located on a surface of the light-transmitting plate close to the lens, and the third anti-reflection film is located on a surface of the polarized transmission film away from the lens.

[0013] For example, according to an embodiment of the present disclosure, the optical structure further includes: a phase compensation film, located between the phase delay film and the polarized reflective film. The phase delay film is located on the second surface, the phase compensation film is located on the light-transmitting plate, and the first anti-reflection film is located on the surface of the phase delay film away from the light-transmitting film; the light-transmitting plate assembly further includes a polarized transmission film, located on the side of the polarized reflective film away from the phase delay film, the polarized transmission film is located on the side of the light-transmitting plate close to the lens, the phase compensation film is located between the polarized reflective film and the lens, the second anti-reflection film is located on the surface of the phase compensation film close to the lens, and the third anti-reflection film is located on the surface of the light-transmitting plate away from the lens.

[0014] For example, according to an embodiment of the present disclosure, at least one of the first surface and the second surface is an aspherical surface or a spherical surface.

[0015] For example, according to an embodiment of the present disclosure, the outline of the lens includes a first positioning angle, and the outline of the light-transmitting flat plate includes a second positioning angle. The first positioning angle is configured to be positioned with the second positioning angle, and the first positioning angle and the second positioning angle are both 80 to 100 degrees.

[0016] The embodiment of the present disclosure provides a lens assembly, comprising a lens barrel and any of the above optical structures. The optical structure is located in the lens barrel, the contour of the lens comprises a first positioning angle, the contour of the light-transmitting flat plate comprises a second positioning angle, the lens barrel is configured to be provided with a third positioning angle at a position where the optical structure is placed, the first positioning angle is positioned with the third positioning angle, and the second positioning angle is positioned with the third positioning angle.

[0017] For example, according to an embodiment of the present disclosure, the ratio of the first positioning angle, the second positioning angle and the third positioning angle is (0.9-1.1): (0.9-1.1): (0.9-1.1), and the first positioning angle is 80-100 degrees.

[0018] An embodiment of the present disclosure provides a display device, comprising a display screen and any one of the above optical structures, wherein the display screen is located on a side of the lens assembly away from the light-transmitting flat panel assembly.

[0019] An embodiment of the present disclosure provides a display device, comprising a display screen and any one of the above lens assemblies, wherein the display screen is located on a side of the lens assembly away from the light-transmitting flat panel assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure, but are not intended to limit the present disclosure.

[0021] Figure 1 A schematic diagram of a partial structure of an optical structure provided according to an example of an embodiment of the present disclosure.

[0022] Figure 2 A schematic diagram of a partial structure of an optical structure provided according to another example of an embodiment of the present disclosure.

[0023] Figures 3 to 7 Schematic diagram of the partial structure of the optical structure provided according to different examples of the embodiments of the present disclosure.

[0024] Figure 8 This is a display image simulation diagram of an optical structure.

[0025] Fig. 9 Based on Figure 3 Simulation diagram of the displayed image of the optical structure shown.

[0026] Fig.10 The figure is a diagram showing the position relationship between a lens and a light-transmitting plate in an optical structure under ideal conditions.

[0027] Fig.11 for Fig.10 The diagram shows the actual position relationship between the lens and the light-transmitting plate in the optical structure shown.

[0028] Fig.12 The figure is a diagram showing the position relationship between the lens and the light-transmitting plate in an optical structure provided according to an embodiment of the present disclosure under ideal conditions.

[0029] Fig.13 for Fig.12 The diagram shows the actual position relationship between the lens and the light-transmitting plate in the optical structure shown.

[0030] Fig.14 It is a schematic diagram of a partial structure of a display device provided according to another embodiment of the present disclosure.

[0031] Fig.15 It is a schematic diagram of a partial structure of a display device provided according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0033] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. The words "include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0034] The embodiment of the present disclosure provides an optical structure, a lens assembly and a display device. The optical structure includes a lens assembly, including a lens and a transflective film, the lens including a first surface and a second surface, the first surface and the second surface are both non-planar, and the transflective film is located on the first surface. The optical structure also includes a light-transmitting flat plate assembly, the light-transmitting flat plate assembly includes a light-transmitting flat plate and a polarized reflective film, the polarized reflective film is located on the light-transmitting flat plate, the light-transmitting flat plate assembly is located on the side of the lens away from the transflective film, and the optical axis of the lens is perpendicular to the main surface of the light-transmitting flat plate; the lens assembly also includes a phase delay film, the phase delay film is located between the polarized reflective film and the transflective film, and at least a portion of the lens is arranged between the phase delay film and the transflective film. The optical structure provided by the present disclosure is conducive to optimizing the polarization matching characteristics of the corresponding light path by arranging a lens assembly including a lens and a phase delay film and a light-transmitting flat plate assembly including a light-transmitting flat plate and a polarized reflective film, thereby greatly reducing the ghost phenomenon.

[0035] The optical structure, lens assembly and display device provided by the embodiments of the present disclosure are described below in conjunction with the accompanying drawings.

[0036] Figure 1 FIG. 1 is a schematic diagram of a partial structure of an optical structure provided according to an example of an embodiment of the present disclosure. Figure 1 As shown, the optical structure includes a lens assembly 20 and a light-transmitting plate assembly 10 . The lens assembly 20 includes a lens 100 , a transflective film 200 and a phase delay film. The light-transmitting plate assembly 10 includes a light-transmitting plate 500 and a polarized reflective film 400 .

[0037] like Figure 1As shown, the lens 100 includes a first surface 110 and a second surface 120, and the first surface 110 and the second surface 120 are both non-planar. In some examples, at least one of the first surface 110 and the second surface 120 is an aspherical surface or a spherical surface. For example, the first surface 110 and the second surface 120 are both aspherical surfaces, or both are spherical surfaces, or one of the first surface 110 and the second surface 120 is a spherical surface and the other is an aspherical surface. The optical structure provided by the present disclosure is not limited thereto, and the first surface and the second surface may also include free-form surfaces, etc. For example, the lens 100 is a single lens. For example, the first surface 110 is bent toward a side away from the light-transmitting flat plate assembly 10 to form a convex surface, and the second surface 120 is bent toward a side close to the light-transmitting flat plate assembly 10 to form a convex surface.

[0038] For example, the second surface 120 may be located on the light-emitting side of the first surface 110. For example, when the optical structure is applied to a display device, the display screen is located on the side of the first surface 110 of the lens 100 away from the second surface 120, and the light emitted by the display screen passes through the first surface 110 and enters the lens 100, and then the light is emitted from the second surface 120.

[0039] like Figure 1 As shown, the transflective film 200 is located on the first surface 110 of the lens 100. For example, the transflective film 200 is configured to transmit part of the light and reflect another part of the light. For example, the transflective film 200 may include at least one film layer, such as the thickness of each film layer may be 10 to 200 nanometers. For example, the transmittance of the transflective film 200 may be 50%, and the reflectivity may be 50%. For example, the transmittance of the transflective film 200 may be 60%, and the reflectivity may be 40%. For example, the transmittance of the transflective film 200 may be 65%, and the reflectivity may be 35%. The optical structure provided by the present disclosure is not limited to this, and the transmittance and reflectivity of the transflective film may be set according to product requirements. For example, the transflective film 200 may be plated on the first surface 110.

[0040] like Figure 1 As shown, the light-transmitting plate assembly 10 is located on the side of the second surface 120 of the lens 100 away from the first surface 110, the polarizing reflective film 400 is located on the light-transmitting plate 500, and the optical axis of the lens 100 is perpendicular to the main surface of the light-transmitting plate 500. Here, "the polarizing reflective film is located on the light-transmitting plate" means that the light-transmitting plate is a structure for supporting the polarizing reflective film, and the polarizing reflective film can be attached to the surface of the light-transmitting plate, or other film layers can be arranged between the polarizing reflective film and the surface of the light-transmitting plate. The main surface of the light-transmitting plate 500 refers to the surface for arranging an optical film layer, such as the polarizing reflective film 400, and can also refer to the surface through which light passes. For example, if the optical axis of the lens 100 is parallel to the X direction, the main surface can be a surface perpendicular to the X direction.

[0041] like Figure 1As shown, the phase delay film 300 is located between the polarizing reflective film 400 and the transflective film 200 , and at least a portion of the lens 100 is disposed between the phase delay film 300 and the transflective film 200 . Figure 1 An example is shown in which the entirety of the lens 100 is disposed between the phase retardation film 300 and the transflective film 200 .

[0042] For example, Figure 1 As shown, the above-mentioned light-transmitting flat plate 500 can be called an optical flat plate. In some examples, the light-transmitting flat plate 500 may include at least one flat surface 501 perpendicular to the optical axis of the lens 100, all flat surfaces 501 are planes, and the polarizing reflective film 400 is located on at least one flat surface 501. For example, the above-mentioned light-transmitting flat plate 500 includes two parallel flat surfaces 501, the two flat surfaces 501 are perpendicular to the optical axis of the lens 100, and the polarizing reflective film 400 is arranged on at least one of the two flat surfaces 501. For example, the above-mentioned light-transmitting flat plate refers to a flat plate-shaped structure that can transmit light, and the flat plate shape may include a cuboid. For example, by selecting the material of the light-transmitting flat plate 500, the flat surfaces 501 of the light-transmitting flat plate 500 can all be hard planes.

[0043] For example, Figure 1 As shown, the phase delay film 300 is configured to enable the transmitted light to achieve conversion between a circular polarization state and a linear polarization state. For example, the phase delay film 300 can be a 1 / 4 wave plate. For example, the material of the phase delay film can include a liquid crystal polymer or a polycarbonate. For example, the phase delay film 300 has the following characteristics: there is a direction with the lowest refractive index and a direction with the highest refractive index in the plane of the film layer, which are the fast axis and the slow axis respectively, and the phase of the polarized light parallel to the slow axis after passing through the phase delay film 300 is delayed by 1 / 4 wavelength compared with the polarized light parallel to the fast axis after passing through the phase delay film 300.

[0044] For example, Figure 1As shown, the function of the polarizing reflective film 400 is as follows: there is a light transmission axis direction in the plane of the film layer, the transmittance of the polarization component of the incident light parallel to the light transmission axis direction (such as s-linear polarized light) is greater than the transmittance of the polarization component perpendicular to the light transmission axis direction (such as p-linear polarized light), and the reflectivity of the polarization component parallel to the light transmission axis direction (such as s-linear polarized light) is less than the reflectivity of the polarization component perpendicular to the light transmission axis direction (such as p-linear polarized light). For example, the polarizing reflective film 400 can also be called a polarization beam splitting film. For example, the transmittance of polarized light parallel to the light transmission axis direction of the polarizing reflective film 400 is not less than 85%, such as not less than 90%, such as not less than 95%, such as not less than 98%; the reflectivity of polarized light perpendicular to the light transmission axis direction of the polarizing reflective film 400 is not less than 85%, such as not less than 90%, such as not less than 95%, such as not less than 98%. For example, the polarized reflective film 400 may include a reflective dual brightness enhancement film (DBEF), a cholesteric-based liquid crystal polymer film, or the like.

[0045] For example, Figure 1 As shown, the angle between the slow axis of the phase delay film 300 and the light transmission axis of the polarizing reflective film 400 is 45 degrees.

[0046] In some examples, such as Figure 1 As shown, the light-transmitting plate assembly 10 further includes a polarizing transmission film 600 , which is located on a side of the polarizing reflection film 400 away from the phase delay film 300 and is disposed on the light-transmitting plate 500 .

[0047] For example, Figure 1 As shown, the light transmission axis of the polarizing transmission film 600 coincides with the light transmission axis of the polarizing reflection film 400. For example, the polarizing transmission film 600 may be a linear polarizing film, which is used to further filter other stray light and only allow polarized light (such as s-linear polarized light) passing through the polarizing transmission film 600 to enter the human eye. For example, the material of the polarizing transmission film 600 may include polyvinyl alcohol (PVA) added with dichroic molecules, a liquid crystal polymer film added with dichroic molecules, etc.

[0048] like Figure 1As shown, the optical structure provided by the present disclosure adopts an ultra-short-focus folded optical path (Pancake), and the principle of the folded optical path is as follows: a wave plate can be set on the light-emitting side of the display screen located on the side of the lens 100 away from the light-transmitting flat plate 500, and the image light emitted from the display screen is converted into right-handed circularly polarized light after passing through the wave plate, and the polarization state of the right-handed circularly polarized light remains unchanged after passing through the transflective film 200. The right-handed circularly polarized light reaches the phase delay film 300 after being transmitted through the lens 100, and the right-handed circularly polarized light incident on the phase delay film 300 is converted into p-linear polarized light, and the p-linear polarized light is reflected back to the phase delay film 300 by the polarizing reflective film 400, where the first reflection occurs. Then, the p-linear polarized light is converted into right-handed circularly polarized light after passing through the phase delay film 300, and the right-handed circularly polarized light reaches the transflective film 200 after being transmitted through the lens 100, and is reflected at the transflective film 200, where the second reflection occurs. Due to the half-wave loss, the reflected light changes from right-handed circularly polarized light to left-handed circularly polarized light. The left circularly polarized light is transmitted through the lens 100 and reaches the phase delay film 300 . The left circularly polarized light is converted into s linearly polarized light through the phase delay film 300 . Then, the s linearly polarized light is transmitted through the polarizing reflective film 400 and the polarizing transmissive film 600 and then emitted to the human eye.

[0049] The above-mentioned folded optical path can change the polarization state of the light propagating between the polarized reflective film and the transflective film, thereby realizing the folding of the light, so that the original focal length of the optical structure is folded due to the additional two reflections caused by the setting of the above-mentioned polarized reflective film, phase delay film and transflective film, thereby greatly compressing the space required between the human eye and the optical structure, thereby making the optical structure smaller and thinner.

[0050] The optical structure provided by the embodiment of the present disclosure is an optical structure using a folded optical path (Pancake). In the optical structure, both surfaces of the lens are non-planar and a phase delay film is arranged on the lens. At the same time, a light-transmitting plate is arranged to arrange a polarized reflective film on the light-transmitting plate. This improves the design freedom of the optical structure to enhance display performance including clarity, field of view angle, etc., and reduces the thickness of the optical structure by folding a longer optical path. It does not significantly increase the cost of the optical structure and the difficulty of the manufacturing process, and is conducive to reducing the ghost phenomenon.

[0051] For example, in a pancake structure, ghosting and stray light are key indicators that affect the experience; in an optical structure using a folded optical path (Pancake), the angle between the film materials, especially the angle fluctuation between the phase retardation film and the polarized reflective film, such as the angle between the slow axis of the phase retardation film and the light transmission axis of the polarized reflective film is not exactly 45 degrees, which is the main factor causing stray light and ghosting. By setting the phase retardation film and the polarized reflective film on the lens and the light-transmitting flat plate respectively, it is convenient to separate and bond the phase retardation film and the polarized reflective film so that the optical axis of the phase retardation film can be corrected during the bonding process. For example, a polarization sensor can be used to measure the direction with an angle of 45 degrees with the light transmission axis of the polarized reflective film, such as the direction with the largest circular deflection of the polarization state, and then the phase retardation film is bonded. The above-mentioned position setting of the phase retardation film and the polarized reflective film is conducive to reducing stray light and ghosting.

[0052] For example, laminating a polarizing reflective film to a flat surface of a planar shape can improve the flatness of the film material, avoid the softening and stretching process of the film material and affect the deviation of its birefringence properties, which is beneficial to improving the comprehensive optical performance of the optical structure, such as clarity, stray light, and field of view.

[0053] In some examples, such as Figure 1 As shown, the phase delay film 300 is attached to the second surface 120 of the lens 100 to facilitate manufacturing and help reduce costs.

[0054] Figure 2 A schematic diagram of a partial structure of an optical structure provided according to another example of an embodiment of the present disclosure. Figure 2 The optical structure shown is Figure 1 The optical structure shown is different in that the optical structure further includes a phase compensation film 700 . Figure 2 The lens 100, the transflective film 200, the phase delay film 300, the polarized reflective film 400, the light-transmitting plate 500 and the polarized transmissive film 600 in the optical structure are Figure 1 The lens 100 , the transflective film 200 , the phase delay film 300 , the polarizing reflective film 400 , the light-transmitting flat plate 500 and the polarizing transmissive film 600 in the optical structure shown have the same features, which will not be described in detail herein.

[0055] In some examples, such as Figure 2 As shown, the phase compensation film 700 is located between the phase delay film 300 and the polarizing reflective film 400 , such as the phase compensation film 700 is located on the second surface 120 of the lens 100 , or on the light-transmitting plate 500 , or inside the lens 100 . Figure 2 An example in which the phase compensation film 700 is located on the second surface of the lens is schematically shown.

[0056] For example, Figure 2As shown, the phase compensation film 700 can be called a C film or a C phase retardation compensation film to compensate for the phase difference of the phase retardation film in the thickness direction, so that the retardation is relatively stable to improve the polarization conversion efficiency. For example, the phase compensation film 700 can be a negative C-type phase retardation compensation film, such as using polyaromatic ester to have a negative phase retardation in the thickness direction. Of course, the embodiments of the present disclosure are not limited to this, and the phase compensation film can also be a positive C-type phase retardation compensation film, which can be selected according to the requirements of the optical structure.

[0057] For example, Figure 2 As shown, the phase compensation film 700 is disposed on a surface of the phase delay film 300 away from the transflective film 200 .

[0058] Figure 3 A schematic diagram of a partial structure of an optical structure provided according to another example of an embodiment of the present disclosure. Figure 3 The optical structure shown is Figure 2 The difference between the optical structure shown is that the optical structure further includes a first anti-reflection film 810 , a second anti-reflection film 820 and a third anti-reflection film 830 . Figure 3 The lens 100, the transflective film 200, the phase delay film 300, the polarized reflective film 400, the light-transmitting plate 500 and the polarized transmissive film 600 in the optical structure are Figure 1 The lens 100 , the transflective film 200 , the phase delay film 300 , the polarizing reflective film 400 , the light-transmitting flat plate 500 and the polarizing transmissive film 600 in the optical structure shown have the same features, which will not be described in detail herein. Figure 3 The phase compensation film 700 in the optical structure shown is Figure 2 The phase compensation film 700 in the optical structure shown has the same features, which will not be described in detail here.

[0059] In some examples, such as Figure 3 As shown, the first anti-reflection film 810 is located on the second surface 120 of the lens 100, and at least one film layer is arranged on the second surface 120. The first anti-reflection film 810 is the film layer closest to the light-transmitting plate assembly 10 among the at least one film layer; the second anti-reflection film 820 is located on the plate surface 501 of the light-transmitting plate 500 close to the lens 100, and at least one film layer is arranged on the plate surface 501. The second anti-reflection film 820 is the film layer closest to the lens 100 among the at least one film layer; the third anti-reflection film 830 is located on the plate surface 501 of the light-transmitting plate 500 away from the lens 100, and at least one film layer is arranged on the plate surface 501. The third anti-reflection film 830 is the film layer farthest from the lens 100 among the at least one film layer. By arranging the anti-reflection film between the lens and the light-transmitting plate in the optical structure, and arranging the anti-reflection film on the side of the light-transmitting plate away from the lens, it is helpful to reduce the stray light caused by reflection.

[0060] For example, Figure 3 As shown, the first anti-reflection film 810, the second anti-reflection film 820 and the third anti-reflection film 830 can be made of the same material. For example, at least one of the first anti-reflection film 810, the second anti-reflection film 820 and the third anti-reflection film 830 can be processed onto the lens 100 or the light-transmitting flat plate 500 by coating or physical deposition. For example, the coating process of at least one of the first anti-reflection film 810, the second anti-reflection film 820 and the third anti-reflection film 830 includes but is not limited to thermal evaporation, electron beam evaporation, magnetron sputtering, atomic vapor deposition, etc.

[0061] In some examples, such as Figure 3 As shown, the phase delay film 300 and the phase compensation film 700 are both located on the second surface 120 of the lens 100, the first anti-reflection film 810 is located on the surface of the phase compensation film 700 away from the phase delay film 300, such as the first anti-reflection film 810 is formed on the surface of the phase compensation film 700; the polarized transmission film 600 is located on the side of the polarized reflection film 400 away from the phase delay film 300, the polarized reflection film 400 is located on the side of the light-transmitting plate 500 away from the lens 100, the second anti-reflection film 820 is located on the surface of the light-transmitting plate 500 close to the lens 100, such as the second anti-reflection film 820 is formed on the surface of the light-transmitting plate 500 close to the lens 100; the third anti-reflection film 830 is located on the surface of the polarized transmission film 600 away from the lens 100, such as the third anti-reflection film 830 is formed on the surface of the polarized transmission film 600.

[0062] Figure 4 A schematic diagram of a partial structure of an optical structure provided according to another example of an embodiment of the present disclosure. Figure 4 The optical structure shown is Figure 3 The optical structure shown is different in that the position of the phase compensation film 700 is different. Figure 4 The lens 100, the transflective film 200, the phase delay film 300, the polarized reflective film 400, the light-transmitting plate 500 and the polarized transmissive film 600 in the optical structure are Figure 1 The lens 100 , the transflective film 200 , the phase delay film 300 , the polarizing reflective film 400 , the light-transmitting flat plate 500 and the polarizing transmissive film 600 in the optical structure shown have the same features, which will not be described in detail herein. Figure 4 The phase compensation film 700 in the optical structure shown is Figure 2 The phase compensation film 700 in the optical structure shown has the same features, which will not be described in detail here.

[0063] In some examples, such as Figure 4 As shown, the phase compensation film 700 is located on the light-transmitting plate 500 . Figure 4 An example in which the phase compensation film 700 is located on the light-transmitting flat plate 500 is schematically shown.

[0064] In some examples, such as Figure 4 As shown, the phase delay film 300 is located on the second surface 120 of the lens 100, the phase compensation film 700 is located on the light-transmitting plate 500, and the first anti-reflection film 810 is located on the surface of the phase delay film 300 away from the transflective film 200; the polarized transmission film 600 is located on the side of the polarized reflection film 400 away from the phase delay film 300, and the polarized reflection film 400 is located on the side of the light-transmitting plate 500 away from the lens 100, such as the polarized reflection film 400, the polarized transmission film 600 and the phase compensation film 700 are all located on the side of the light-transmitting plate 500 away from the lens 100, and the phase compensation film 700 is closest to the phase delay film 300; the second anti-reflection film 820 is located on the surface of the light-transmitting plate 500 close to the lens 100, and the third anti-reflection film 830 is located on the surface of the polarized transmission film 600 away from the lens 100.

[0065] Figure 5 A schematic diagram of a partial structure of an optical structure provided according to another example of an embodiment of the present disclosure. Figure 5 The optical structure shown is Figure 3 The optical structure shown is different in that the position of the phase compensation film 700 is different. Figure 5 The lens 100, the transflective film 200, the phase delay film 300, the polarized reflective film 400, the light-transmitting plate 500 and the polarized transmissive film 600 in the optical structure are Figure 1 The lens 100 , the transflective film 200 , the phase delay film 300 , the polarizing reflective film 400 , the light-transmitting flat plate 500 and the polarizing transmissive film 600 in the optical structure shown have the same features, which will not be described in detail herein. Figure 5 The phase compensation film 700 in the optical structure shown is Figure 2 The phase compensation film 700 in the optical structure shown has the same features, which will not be described in detail here.

[0066] In some examples, such as Figure 5 As shown, the phase compensation film 700 is located on the light-transmitting plate 500 . Figure 5 An example in which the phase compensation film 700 is located on the light-transmitting flat plate 500 is schematically shown.

[0067] In some examples, such as Figure 5As shown, the phase retardation film 300 is located on the second surface 120 of the lens 100, the phase compensation film 700 is located on the light-transmitting plate 500, the first anti-reflection film 810 is located on the surface of the phase retardation film 300 away from the transflective film 200; the polarized transmission film 600 is located on the side of the polarized reflection film 400 away from the phase retardation film 300, the polarized transmission film 600 is located on the side of the light-transmitting plate 500 close to the lens 100, and the phase compensation film 700 is located between the polarized reflection film 400 and the lens 100, such as the phase compensation film 700, the polarized reflection film 400 and the polarized transmission film 600 are all located between the light-transmitting plate 500 and the lens 100; the second anti-reflection film 820 is located on the surface of the phase compensation film 700 close to the lens 100, and the third anti-reflection film 830 is located on the surface of the light-transmitting plate 500 away from the lens 100. By arranging the phase compensation film, the polarized reflection film and the polarized transmission film between the light-transmitting plate and the lens, the above-mentioned film layers can be protected to prevent users from touching these film layers.

[0068] Of course, the embodiments of the present disclosure are not limited to Figures 1 to 5 The light-transmitting plate in the optical structure shown is a plate. For example, the light-transmitting plate may include multiple plates, and the multiple plates include multiple plate surfaces. The polarized reflective film, the polarized transmissive film, the second anti-reflection film, and the third anti-reflection film may all be arranged on the corresponding plate surfaces. The film layer located between adjacent plates and the film layer located on the outermost plate surface among the multiple plate surfaces may all be referred to as being located on the light-transmitting plate.

[0069] For example, Figures 1 to 5 As shown, along the direction parallel to the optical axis of the lens 100, the maximum thickness of the lens 100 is 2 to 8 mm, the thickness of the light-transmitting plate 500 is 0.5 to 4.5 mm, and the distance between the lens 100 and the light-transmitting plate 500 is 1 to 80 mm. For example, along the direction parallel to the optical axis of the lens 100, the maximum thickness of the lens 100 is 3 to 6 mm, the thickness of the light-transmitting plate 500 is 1 to 3 mm, and the distance between the lens 100 and the light-transmitting plate 500 is 10 to 60 mm. For example, along the direction parallel to the optical axis of the lens 100, the maximum thickness of the lens 100 is 4 to 7 mm, the thickness of the light-transmitting plate 500 is 2 to 4 mm, and the distance between the lens 100 and the light-transmitting plate 500 is 15 to 70 mm.

[0070] For example, Figures 1 to 5 As shown, the lens 100 is an aspherical single lens, the curvature of the first surface 110 can be -1 to 1, and the curvature of the second surface 120 can be -10 to 10.

[0071] The light-transmitting flat plate provided by the present disclosure can be made of glass material, such as optical glass. Compared with a few optical plastics, the refractive index and dispersion characteristics of optical glass can be selected in a larger range. For example, the refractive index of optical glass can be 1.4 to 2.2, and the dispersion Abbe number of optical glass can be 20 to 90. By flexibly selecting glass materials, a certain dispersion compensation effect can be achieved, which is conducive to the display device using the optical structure having better display performance.

[0072] For example, Figures 1 to 5 It is schematically shown that the polarizing reflective film 400 and the polarizing transmissive film 600 are located on the same side of the light-transmitting flat plate 500, and the laminating process is simple, which is conducive to cost saving.

[0073] However, the embodiments of the present disclosure are not limited thereto. For example, the polarizing reflective film and the polarizing transmissive film may also be located on both sides of the light-transmitting flat plate 500 .

[0074] Figure 6 A schematic diagram of a partial structure of an optical structure provided according to another example of an embodiment of the present disclosure. Figure 6 The optical structure shown is Figure 3 The optical structure shown is different in that the position of the phase retarder film 300 is different. Figure 6 The lens 100, the transflective film 200, the phase delay film 300, the polarized reflective film 400, the light-transmitting plate 500 and the polarized transmissive film 600 in the optical structure are Figure 1 The lens 100 , the transflective film 200 , the phase delay film 300 , the polarizing reflective film 400 , the light-transmitting flat plate 500 and the polarizing transmissive film 600 in the optical structure shown have the same features, which will not be described in detail herein. Figure 6 The phase compensation film 700 in the optical structure shown is Figure 2 The phase compensation film 700 in the optical structure shown has the same features, which will not be described in detail here.

[0075] In some examples, such as Figure 6 As shown, the phase delay film 300 is located inside the lens 100 . Figure 6 An example is shown in which the phase retardation film 300 is located inside the lens 100. For example, the phase retardation film 300 may be in direct contact with the lens 100, such as no adhesive layer may be provided between the phase retardation film 300 and the lens 100, such as the two parts of the lens 100 located on both sides of the phase retardation film 300 are two parts of an integral lens 100, and the two parts are an integrated structure in the process of forming the lens 100. For example, the surface of the phase retardation film 300 is in direct contact with the lens 100, which means that the phase retardation film 300 is wrapped by the lens 100, and in the process of forming the lens 100, the phase retardation film 300 is surrounded by the fluid material forming the lens 100. For example, the phase retardation film 300 is embedded inside the lens 100.

[0076] The phase delay film is arranged inside the lens to realize the integrated formation of the phase delay film and the lens without using a bonding medium, which is beneficial to avoid the influence of the bonding process on the optical performance of the phase delay film, so as to improve the reliability of the optical structure.

[0077] For example, a light-transmitting support plate (not shown) may be further provided inside the lens 100, and the phase delay film is located on the light-transmitting support plate. For example, the phase delay film and the light-transmitting support plate are embedded together inside the lens 100. For example, the refractive index of the light-transmitting support plate is the same as that of the lens. For example, the material of the light-transmitting support plate is the same as that of the lens, which is conducive to reducing the influence of the light-transmitting support plate on the light propagating in the lens.

[0078] In some examples, such as Figure 6 As shown, the material of the lens 100 includes an optical resin. For example, the material of the lens 100 includes a thermosetting or UV curing optical resin. For example, the main resin of the optical resin includes epoxy, epoxy acrylic, polyurethane, polyurea-polyurethane, allyl diglycol carbonate, polyester, etc., which is not limited in the embodiments of the present disclosure.

[0079] In some examples, such as Figure 6 As shown, the phase compensation film 700 is located on the second surface 120 of the lens 100, the first anti-reflection film 810 is located on the surface of the phase compensation film 700 away from the phase delay film 300, the polarizing reflective film 400 is located on the side of the light-transmitting plate 500 away from the lens 100, the second anti-reflection film 820 is located on the surface of the light-transmitting plate 500 close to the lens 100, and the third anti-reflection film 830 is located on the surface of the polarizing transmission film 600 away from the lens 100.

[0080] Figure 7 A schematic diagram of a partial structure of an optical structure provided according to another example of an embodiment of the present disclosure. Figure 7 The optical structure shown is Figure 6 The optical structure shown is different in that the position of the phase compensation film 700 is different. Figure 7 The lens 100, the transflective film 200, the phase delay film 300, the polarized reflective film 400, the light-transmitting plate 500 and the polarized transmissive film 600 in the optical structure are Figure 1 The lens 100 , the transflective film 200 , the phase delay film 300 , the polarizing reflective film 400 , the light-transmitting flat plate 500 and the polarizing transmissive film 600 in the optical structure shown have the same features, which will not be described in detail herein. Figure 7 The phase compensation film 700 in the optical structure shown is Figure 2 The phase compensation film 700 in the optical structure shown has the same features, which will not be described in detail here.

[0081] In some examples, such as Figure 7 As shown, the phase delay film 300 and the phase compensation film 700 are both located inside the lens 100. For example, a light-transmitting support plate may be provided inside the lens 100, or may not be provided, and it may be provided according to the requirements of the optical structure.

[0082] In some examples, such as Figure 7 As shown, the first anti-reflection film 810 is located on the second surface 120 of the lens 100, the polarizing reflective film 400 is located on the side of the light-transmitting plate 500 away from the lens 100, the second anti-reflection film 820 is located on the surface of the light-transmitting plate 500 close to the lens 100, and the third anti-reflection film 830 is located on the surface of the polarizing transmission film 600 away from the lens 100.

[0083] For example, Figure 6 to Figure 7 It is schematically shown that the polarizing reflective film 400 and the polarizing transmissive film 600 are located on the same side of the light-transmitting plate 500, such as both located on the side of the light-transmitting plate 500 away from the lens 100, but is not limited to this. For example, the polarizing reflective film and the polarizing transmissive film can also be located on both sides of the light-transmitting plate 500, or the polarizing reflective film and the polarizing transmissive film can be located between the light-transmitting plate and the lens.

[0084] Figure 8 This is a display image simulation diagram of an optical structure. Fig. 9 Based on Figure 3 Simulation diagram of the displayed image of the optical structure shown.

[0085] Figure 8 When the phase delay film, polarization reflection film and polarization transmission film are all arranged on the light-transmitting flat plate, the display image simulation diagram of the optical structure is as follows: Figure 8 and Fig. 9 As shown in the figure, the white bright spot in the middle is the main target image, and the light spots around the bright spot are caused by ghost images and stray light when the optical structure is applied to the display device. It can be seen from the figure that Fig. 9 The light spot around the bright spot in the simulation picture is relative to Figure 8 The light spots around the bright spots in the simulation image are lighter. Therefore, in the optical structure provided by the present invention, by setting the phase delay film in the lens assembly and setting the polarized reflection film and the polarized transmission film in the light-transmitting flat plate assembly, the ghost and stray light phenomena can be reduced.

[0086] In the research, the inventor of the present application found that the angle between the slow axis of the phase retardation film and the light transmission axis of the polarizing reflective film has a great influence on the ghost phenomenon, and the angle between the slow axis of the phase retardation film and the light transmission axis of the polarizing reflective film will be affected by the lamination tolerance between the polarizing reflective film and the light transmission plate, the lamination tolerance between the phase retardation film and the lens, and the assembly tolerance between the lens and the light transmission plate and the lens barrel. For example, before the polarizing reflective film is laminated on the light transmission plate, the light transmission plate will pre-set the lamination angle of the polarizing reflective film, but in the actual process of laminating the polarizing reflective film to the light transmission plate, there will be a certain lamination tolerance, such as an angle deviation, such as less than 0.2°; similarly, before the phase retardation film is laminated on the lens, the lens will pre-set the lamination angle of the phase retardation film, but in the actual process of laminating the phase retardation film to the lens, there will be a certain lamination tolerance, such as an angle deviation, such as less than 0.2°. When the optical structure is applied to a display device, the optical structure is disposed in a lens barrel of a lens assembly. During the process of assembling the lenses and the light-transmitting flat plate in the optical structure in the lens barrel, a certain assembly tolerance will exist.

[0087] In view of the above-mentioned assembly tolerance, adopting an active alignment solution, such as an optical alignment solution that measures the polarization angle of the outgoing light, will result in excessively high costs.

[0088] Fig.10 The figure is a diagram showing the position relationship between a lens and a light-transmitting plate in an optical structure under ideal conditions. Fig.11 for Fig.10 The diagram shows the actual position relationship between the lens and the light-transmitting plate in the optical structure shown. Fig.10 and Fig.11 The lamination relationship diagram of the lens 100 and the light-transmitting flat plate 500 is shown, and the optical axis of the lens 100 is perpendicular to the paper surface.

[0089] For example, Fig.10 and Fig.11 As shown, the angle θ1 between the edge L2 of the lens 100 and the edge L1 of the light-transmitting plate 500 is 0° in an ideal situation. However, during the conventional alignment assembly process, at least one of the lens 100 and the light-transmitting plate 500 may rotate to a certain extent, such as rotating in the opposite direction relative to the lens barrel 30, so that the angle θ2 between the edge L2 of the lens 100 and the edge L1 of the light-transmitting plate 500 is greater than 2°, thereby affecting the angle between the slow axis of the phase delay film and the light-transmitting axis of the polarizing reflection film, and aggravating the ghost phenomenon.

[0090] Fig.12 The figure is a diagram showing the position relationship between the lens and the light-transmitting plate in an optical structure provided according to an embodiment of the present disclosure under ideal conditions. Fig.13 for Fig.12 The diagram shows the actual position relationship between the lens and the light-transmitting plate in the optical structure shown.

[0091] In some examples, such as Fig.12 and Fig.13 As shown, the profile of the lens 100 includes a first positioning angle 101, and the profile of the light-transmitting plate 500 includes a second positioning angle 502. The first positioning angle 101 is configured to be positioned with the second positioning angle 502, and the first positioning angle 101 and the second positioning angle 502 are both 80 to 100 degrees.

[0092] For example, Fig.12 and Fig.13 As shown, the angle θ3 between the edge L12 of the lens 100 and the edge L11 of the light-transmitting plate 500 is 0° in an ideal situation. By positioning the first positioning angle 101 and the second positioning angle 502, the rotation angle of the lens 100 and the light-transmitting plate 500 is small during the assembly process, and the angle θ4 between the edge L12 of the lens 100 and the edge L11 of the light-transmitting plate 500 is less than 0.5°.

[0093] The optical structure provided by the present disclosure is advantageous in that the assembly tolerance of the lens and the light-transmitting plate is reduced without increasing the cost, thereby alleviating the ghost phenomenon, by specially designing the contours of the lens and the light-transmitting plate, such as setting a first positioning angle and a second positioning angle respectively.

[0094] For example, Fig.12 and Fig.13 As shown, the ratio of the first positioning angle 101 to the second positioning angle 502 is 0.9 to 1.1. For example, the first positioning angle 101 and the second positioning angle 502 can be equal. For example, the first positioning angle 101 and the second positioning angle 502 are both 85 to 95 degrees, such as 90 degrees, and the first positioning angle 101 and the second positioning angle 503 are both right angles.

[0095] For example, Fig.12 and Fig.13 As shown, the lens 100 may include one first positioning angle 101, two first positioning angles 101, or more first positioning angles 101. Fig.12 and Fig.13 The schematic diagram shows that the lens includes two first positioning angles, in which case one first positioning angle can play a main positioning role, and the other first positioning angle can play an auxiliary positioning role. For example, the light-transmitting plate 500 can include one second positioning angle 503, or two second positioning angles 502, or more second positioning angles 502. Fig.12 and Fig.13 It is schematically shown that the light-transmitting flat plate includes two second positioning angles. In this case, one second positioning angle can play a main positioning role, and the other second positioning angle can play an auxiliary positioning role.

[0096] Fig.12 and Fig.13A lens assembly provided by another embodiment of the present disclosure is shown. The lens assembly includes a lens barrel 30 and an optical structure located in the lens barrel 30. The optical structure may be the optical structure shown in any of the above examples.

[0097] like Fig.12 and Fig.13 As shown, the optical structure is located in the lens barrel 30, the outline of the lens 100 includes a first positioning angle 101, the outline of the light-transmitting flat plate 500 includes a second positioning angle 502, and the lens barrel 30 is configured to be provided with a third positioning angle 31 at the position where the optical structure is placed, the first positioning angle 101 is positioned with the third positioning angle 31, and the second positioning angle 502 is positioned with the third positioning angle 31.

[0098] By setting a third positioning angle at a position of the lens in the lens barrel corresponding to the lens so that the first positioning angle of the lens is positioned with the third positioning angle, and setting a third positioning angle at a position of the lens barrel corresponding to the light-transmitting plate so that the second positioning angle of the light-transmitting plate is positioned with the third positioning angle, it is beneficial to reduce the assembly tolerance of the lens, the light-transmitting plate and the lens barrel without increasing the cost, thereby alleviating the ghost phenomenon.

[0099] In some examples, such as Fig.12 and Fig.13 As shown, the ratio of the first positioning angle 101, the second positioning angle 502 and the third positioning angle 31 is (0.9-1.1): (0.9-1.1): (0.9-1.1), and the first positioning angle is 80-100 degrees.

[0100] For example, Fig.12 and Fig.13 As shown, the first positioning angle 101, the second positioning angle 502 and the third positioning angle 31 are all 85-95 degrees, such as 90 degrees, and the first positioning angle 101, the second positioning angle 503 and the third positioning angle 31 are all right angles. For example, the first positioning angle 101, the second positioning angle 502 and the third positioning angle 31 are equal.

[0101] For example, Fig.12 and Fig.13 As shown, during the assembly process, the angles between the edge L12 of the lens 100, the edge L11 of the light-transmitting plate 500 and the corresponding edge of the lens barrel are all less than 0.5°.

[0102] For example, Fig.12 and Fig.13As shown, the lens 100 includes two first positioning angles 101, the light-transmitting plate 500 includes two second positioning angles 502, and the lens barrel 30 includes four third positioning angles 31. The two third positioning angles 31 in the lens barrel 30 are used to be positioned with the two first positioning angles 101, and the other two third positioning angles 31 in the lens barrel 30 are used to be positioned with the two second positioning angles 502. For example, a straight line extending in a direction parallel to the optical axis of the lens 100 passes through a first positioning angle 101, a second positioning angle 502, and a second third positioning angle 31. For example, when the two third positioning angles 31 in the lens barrel 30 are positioned with a first positioning angle 101 of the lens 100 and a second positioning angle 502 of the light-transmitting plate 500, respectively, the other two third positioning angles 31 in the lens barrel 30 have a certain engagement relationship with another first positioning angle 101 of the lens 100 and another second positioning angle 502 of the light-transmitting plate 500, respectively, to prevent the lens and the light-transmitting plate from rotating at a large angle relative to the lens barrel.

[0103] Fig.14 FIG. 1 is a schematic diagram of a partial structure of a display device provided according to another embodiment of the present disclosure. Fig.14 As shown, the display device includes a display screen 40 and the optical structure in any of the above examples. The display screen 40 is located on a side of the lens assembly 20 away from the light-transmitting flat plate assembly 10 . Fig.14 The optical structure is schematically shown as Figure 3 The optical structure shown, but not limited to this, can be the optical structure in any of the above examples.

[0104] For example, Fig.14 As shown, the display surface of the display screen 40 is located at the focal plane of the light incident side of the optical structure.

[0105] For example, Fig.14 As shown, the display screen 40 can be any type of display screen, such as a liquid crystal display screen, an organic light emitting diode display screen, a quantum dot display screen, etc.

[0106] For example, the display device may be a virtual reality (VR) display device. For example, the virtual reality display device may be a display device using an ultra-short-throw folded optical path.

[0107] For example, the display device may be a near-eye display device, and the near-eye display device may be a wearable VR helmet, VR glasses, etc., but the embodiments of the present disclosure are not limited thereto.

[0108] Fig.15 FIG. 1 is a schematic diagram of a partial structure of a display device provided according to another embodiment of the present disclosure. Fig.15 As shown, the display device includes a display screen 40 and the above-mentioned lens assembly. The display screen 40 is located on a side of the lens 100 away from the light-transmitting flat plate assembly 20 . Fig.15 The optical structure is schematically shown as Figure 3 The optical structure shown, but not limited to this, can be the optical structure in any of the above examples.

[0109] For example, Fig.15 As shown, the display surface of the display screen 40 is located at the focal plane of the light incident side of the optical structure.

[0110] For example, Fig.15 As shown, the display screen 40 can be any type of display screen, such as a liquid crystal display screen, an organic light emitting diode display screen, a quantum dot display screen, etc.

[0111] For example, the display device may be a virtual reality (VR) display device. For example, the virtual reality display device may be a display device using an ultra-short-throw folded optical path.

[0112] For example, the display device may be a near-eye display device, and the near-eye display device may be a wearable VR helmet, VR glasses, etc., but the embodiments of the present disclosure are not limited thereto.

[0113] There are a few points to note:

[0114] (1) In the drawings of the embodiments of the present disclosure, only the structures related to the embodiments of the present disclosure are involved, and other structures can refer to the general design.

[0115] (2) In the absence of conflict, features in the same embodiment or in different embodiments of the present disclosure may be combined with each other.

[0116] The above are merely exemplary embodiments of the present disclosure and are not intended to limit the protection scope of the present disclosure. The protection scope of the present disclosure is determined by the appended claims.

Claims

1. An optical structure comprising: A lens assembly, comprising a lens and a transflective film, wherein the lens comprises a first surface and a second surface, wherein the first surface and the second surface are both non-planar, and the transflective film is located on the first surface; Wherein, the optical structure further comprises a light-transmitting plate assembly, the light-transmitting plate assembly comprises a light-transmitting plate and a polarized reflective film, the polarized reflective film is located on the light-transmitting plate, the light-transmitting plate assembly is located on a side of the lens away from the transflective film, and the optical axis of the lens is perpendicular to the main surface of the light-transmitting plate; The lens assembly further comprises a phase delay film, wherein the phase delay film is located between the polarized reflective film and the transflective film, and at least a portion of the lens is disposed between the phase delay film and the transflective film.

2. The optical structure according to claim 1, wherein: The phase delay film is attached to the second surface of the lens.

3. The optical structure according to claim 1, wherein: The phase delay film is located inside the lens and directly contacts the lens.

4. The optical structure according to claim 1, wherein: The light-transmitting plate assembly further comprises a polarizing transmission film, which is located on a side of the polarizing reflection film away from the phase delay film and is arranged on the light-transmitting plate.

5. The optical structure according to claim 1, further comprising: a phase compensation film, located between the phase delay film and the polarization reflection film, Wherein, the phase compensation film is located on the second surface, or on the light-transmitting flat plate, or inside the lens.

6. The optical structure according to any one of claims 1 to 5, wherein: The light-transmitting plate includes at least one plate surface perpendicular to the optical axis of the lens, the at least one plate surface is a plane, and the polarizing reflective film is located on the at least one plate surface.

7. The optical structure according to claim 1, further comprising: A first anti-reflection film, located on the second surface of the lens, wherein at least one film layer is disposed on the second surface, and the first anti-reflection film is the film layer closest to the light-transmitting flat panel assembly among the at least one film layer; A second anti-reflection film is located on a flat surface of the light-transmitting flat plate close to the lens, the flat surface is provided with at least one film layer, and the second anti-reflection film is the film layer closest to the lens assembly among the at least one film layer; The third anti-reflection film is located on the flat surface of the light-transmitting flat plate away from the lens. At least one film layer is arranged on the flat surface. The third anti-reflection film is the film layer farthest from the lens assembly among the at least one film layer.

8. The optical structure according to claim 7, further comprising: a phase compensation film, located between the phase delay film and the polarization reflection film, Wherein, the phase delay film and the phase compensation film are both located on the second surface, and the first anti-reflection film is located on the surface of the phase compensation film away from the phase delay film; The light-transmitting plate assembly also includes a polarizing transmission film, which is located on a side of the polarizing reflection film away from the phase delay film, the polarizing reflection film is located on a side of the light-transmitting plate away from the lens, the second anti-reflection film is located on a surface of the light-transmitting plate close to the lens, and the third anti-reflection film is located on a surface of the polarizing transmission film away from the lens.

9. The optical structure according to claim 7, further comprising: a phase compensation film, located between the phase delay film and the polarization reflection film, Wherein, the phase delay film is located on the second surface, the phase compensation film is located on the light-transmitting flat plate, and the first anti-reflection film is located on the surface of the phase delay film away from the transflective film; The light-transmitting plate assembly also includes a polarizing transmission film, which is located on a side of the polarizing reflection film away from the phase delay film, the polarizing reflection film is located on a side of the light-transmitting plate away from the lens, the second anti-reflection film is located on a surface of the light-transmitting plate close to the lens, and the third anti-reflection film is located on a surface of the polarizing transmission film away from the lens.

10. The optical structure according to claim 7, further comprising: a phase compensation film, located between the phase delay film and the polarization reflection film, Wherein, the phase delay film is located on the second surface, the phase compensation film is located on the light-transmitting flat plate, and the first anti-reflection film is located on the surface of the phase delay film away from the transflective film; The light-transmitting plate assembly also includes a polarizing transmission film, which is located on the side of the polarizing reflection film away from the phase delay film, the polarizing transmission film is located on the side of the light-transmitting plate close to the lens, the phase compensation film is located between the polarizing reflection film and the lens, the second anti-reflection film is located on the surface of the phase compensation film close to the lens, and the third anti-reflection film is located on the surface of the light-transmitting plate away from the lens.

11. The optical structure according to any one of claims 1 to 5, wherein: At least one of the first surface and the second surface is an aspherical surface or a spherical surface.

12. The optical structure according to any one of claims 1 to 5, wherein: The outline of the lens includes a first positioning angle, and the outline of the light-transmitting flat plate includes a second positioning angle. The first positioning angle is configured to be positioned with the second positioning angle, and the first positioning angle and the second positioning angle are both 80 to 100 degrees.

13. A lens assembly, comprising a lens barrel and the optical structure according to any one of claims 1 to 12, in, The optical structure is located in the lens barrel, the outline of the lens includes a first positioning angle, the outline of the light-transmitting flat plate includes a second positioning angle, the lens barrel is configured to be provided with a third positioning angle at a position where the optical structure is placed, the first positioning angle is positioned with the third positioning angle, and the second positioning angle is positioned with the third positioning angle.

14. The lens assembly according to claim 13, wherein: The ratio of the first positioning angle, the second positioning angle and the third positioning angle is (0.9-1.1):(0.9-1.1):(0.9-1.1), and the first positioning angle is 80-100 degrees.

15. A display device, comprising a display screen and the optical structure according to any one of claims 1 to 12, wherein: The display screen is located at a side of the lens assembly away from the light-transmitting flat panel assembly.

16. A display device comprising a display screen and the lens assembly according to claim 13, wherein: The display screen is located at a side of the lens assembly away from the light-transmitting flat panel assembly.

Images