Optical structure, lens assembly, and display device

Abstract

An optical structure, a lens assembly and a display device. The optical structure comprises a lens assembly, comprising a lens and a transflector, the lens comprising a first surface and a second surface, both of which are non-planar, and the transflector is located on the first surface. The optical structure further comprises a light-transmitting flat plate assembly, comprising 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 transflector, 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 polarized reflective film and the transflector, and at least part of the lens is arranged between the phase delay film and the transflector. The optical structure provided by the present disclosure is beneficial to reducing ghosting by arranging 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 polarized reflective film.

Description

Technical Field

[0001] This disclosure relates to an optical structure, a lens assembly, and a display device. Background Technology

[0002] Virtual Reality (VR) technology allows users to experience a virtual world in an immersive way. Devices using VR technology include Fresnel lenses and pancake optical paths. The pancake optical path significantly reduces the distance between the near-eye display device and the human eye by folding the optical path, making VR devices thinner and lighter. Currently, VR technology is widely used in gaming, retail, education, and industry. Summary of the Invention

[0003] This disclosure provides an optical structure, a lens assembly, and a display device.

[0004] This disclosure provides an optical structure including: a lens assembly comprising a lens and a reflective coating, the lens including a first surface and a second surface, both the first and second surfaces being non-planar, and the reflective coating located on the first surface. The optical structure further includes a light-transmitting plate assembly comprising a light-transmitting plate and a polarizing reflective coating, the polarizing reflective coating being located on the light-transmitting plate, the light-transmitting plate assembly being located on the side of the lens away from the reflective coating, and the optical axis of the lens being perpendicular to the main surface of the light-transmitting plate; the lens assembly further includes a phase retardation film located between the polarizing reflective coating and the reflective coating, and at least a portion of the lens is disposed between the phase retardation film and the reflective coating.

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

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

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

[0008] For example, according to an embodiment of this disclosure, the optical structure further includes a phase compensation film located between the phase retardation film and the polarizing reflection film. The phase compensation film is located on the second surface, or on the light-transmitting plate, or inside the lens.

[0009] For example, according to an embodiment of this 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 being planar, and the polarizing reflective film being located on the at least one plate surface.

[0010] For example, according to an embodiment of this disclosure, the optical structure further includes: a first antireflective film located on a second surface of the lens, wherein at least one film layer is disposed on the second surface, and the first antireflective film is the film layer closest to the light-transmitting plate assembly among the at least one film layer; a second antireflective film located on the plate surface of the light-transmitting plate close to the lens, wherein at least one film layer is disposed on the plate surface, and the second antireflective film is the film layer closest to the lens assembly among the at least one film layer; and a third antireflective film located on the plate surface of the light-transmitting plate away from the lens, wherein at least one film layer is disposed on the plate surface, and the third antireflective film is the film layer furthest from the lens assembly among the at least one film layer.

[0011] For example, according to embodiments of this disclosure, the optical structure further includes: a phase compensation film located between the phase retardation film and the polarizing reflection film. Both the phase retardation film and the phase compensation film are located on the second surface, and the first antireflection film is located on the surface of the phase compensation film away from the phase retardation film; the light-transmitting plate assembly further includes a polarizing transmission film located on the side of the polarizing reflection film away from the phase retardation film, the polarizing reflection film being located on the side of the light-transmitting plate away from the lens, the second antireflection film being located on the surface of the light-transmitting plate close to the lens, and the third antireflection film being located on the surface of the polarizing transmission film away from the lens.

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

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

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

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

[0016] This disclosure provides a lens assembly, including a lens barrel and any of the aforementioned optical structures. The optical structure is located within the lens barrel. The outline of the lens includes a first positioning angle, the outline of the light-transmitting plate includes a second positioning angle, and the lens barrel is configured such that a third positioning angle is provided at the position where the optical structure is placed. The first positioning angle and the third positioning angle are positioned together, and the second positioning angle and the third positioning angle are also positioned together.

[0017] For example, according to an embodiment of this 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] This disclosure provides a display device including a display screen and any of the above-described optical structures, wherein the display screen is located on the side of the lens assembly away from the light-transmitting flat panel assembly.

[0019] This disclosure provides a display device including a display screen and any of the lens assemblies described above, wherein the display screen is located on the side of the lens assembly away from the light-transmitting flat panel assembly. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this disclosure and are not intended to limit this disclosure.

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

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

[0023] Figures 3 to 7 This is a partial structural schematic diagram of an optical structure provided according to different examples of embodiments of the present disclosure.

[0024] Figure 8 This is a simulation diagram of an optical structure for displaying images.

[0025] Figure 9 According to Figure 3 The image simulation of the optical structure shown is shown.

[0026] Figure 10 This is a diagram showing the ideal positional relationship between a lens and a light-transmitting plate in an optical structure.

[0027] Figure 11 for Figure 10 The diagram shows the positional relationship between the lens and the light-transmitting plate in the optical structure under actual conditions.

[0028] Figure 12 This is a diagram showing the ideal positional relationship between the lens and the light-transmitting plate in an optical structure provided according to an embodiment of the present disclosure.

[0029] Figure 13 for Figure 12 The diagram shows the positional relationship between the lens and the light-transmitting plate in the optical structure under actual conditions.

[0030] Figure 14 This is a partial structural schematic diagram of a display device provided according to another embodiment of the present disclosure.

[0031] Figure 15 This is a partial structural schematic diagram of a display device provided according to another embodiment of the present disclosure. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Based on the described embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0033] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that an element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects.

[0034] This disclosure provides an optical structure, a lens assembly, and a display device. The optical structure includes a lens assembly comprising a lens and a reflective coating. The lens includes a first surface and a second surface, both of which are non-planar. The reflective coating is located on the first surface. The optical structure also includes a light-transmitting plate assembly comprising a light-transmitting plate and a polarizing reflective film. The polarizing reflective film is located on the light-transmitting plate, and the light-transmitting plate assembly is located on the side of the lens away from the reflective coating. The optical axis of the lens is perpendicular to the main surface of the light-transmitting plate. The lens assembly also includes a phase retardation film located between the polarizing reflective film and the reflective coating, with at least a portion of the lens disposed between the phase retardation film and the reflective coating. The optical structure provided by this disclosure, by incorporating a lens assembly including a lens and a phase retardation film and a light-transmitting plate assembly including a light-transmitting plate and a polarizing reflective film, facilitates the optimization of the polarization matching characteristics of the corresponding optical path, thereby significantly reducing ghosting phenomena.

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

[0036] Figure 1 This is a partial structural schematic diagram of an optical structure provided according to an example embodiment of the present disclosure. For example... 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 transmissive film 200, and a phase retardation film. The light-transmitting plate assembly 10 includes a light-transmitting plate 500 and a polarizing reflective film 400.

[0037] like Figure 1As shown, lens 100 includes a first surface 110 and a second surface 120, both of which are non-planar. In some examples, at least one of the first surface 110 and the second surface 120 is aspherical or spherical. For example, both the first surface 110 and the second surface 120 may be aspherical, or both may be spherical, or one of the first surface 110 and the second surface 120 may be spherical and the other aspherical. The optical structure provided in this disclosure is not limited thereto; the first and second surfaces may also include freeform surfaces, etc. For example, lens 100 is a single lens. For example, the first surface 110 is bent toward the side away from the light-transmitting plate assembly 10 to form a convex surface, and the second surface 120 is bent toward the side closer to the light-transmitting 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. The light emitted from the display screen enters the lens 100 after passing through the first surface 110, and then the light is emitted from the second surface 120.

[0039] like Figure 1 As shown, the transflective coating 200 is located on the first surface 110 of the lens 100. For example, the transflective coating 200 is configured to transmit part of the light and reflect another part of the light. For example, the transflective coating 200 may include at least one film layer, such as each film layer having a thickness of 10-200 nanometers. For example, the transflective coating 200 may have a transmittance of 50% and a reflectance of 50%. For example, the transflective coating 200 may have a transmittance of 60% and a reflectance of 40%. For example, the transflective coating 200 may have a transmittance of 65% and a reflectance of 35%. The optical structure provided in this disclosure is not limited thereto; the transmittance and reflectance of the transflective coating can be set according to product requirements. For example, the transflective coating 200 may be deposited 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 used to support the polarizing reflective film. The polarizing reflective film can be attached to the surface of the light-transmitting plate, or other film layers can be disposed 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 used to dispose of optical film layers, such as the polarizing reflective film 400, or it can 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 retardation film 300 is located between the polarization reflection film 400 and the transmission reflection film 200, and at least a portion of the lens 100 is disposed between the phase retardation film 300 and the transmission reflection film 200. Figure 1 This shows a complete example of a lens 100 disposed between a phase retardation film 300 and a transflective film 200.

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

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

[0044] For example, such as Figure 1As shown, the polarizing reflective film 400 functions as follows: Within the plane of the film layer, there exists a transmission axis. The transmittance of the polarization component of incident light parallel to this transmission axis (e.g., s-polarized light) is greater than the transmittance of the polarization component perpendicular to this transmission axis (e.g., p-polarized light), and the reflectance of the polarization component parallel to this transmission axis (e.g., s-polarized light) is less than the reflectance of the polarization component perpendicular to this transmission axis (e.g., p-polarized light). For example, the polarizing reflective film 400 can also be called a polarizing beam splitter. For example, the transmittance of polarized light parallel to the transmission axis of the polarizing reflective film 400 is not less than 85%, and is not less than 90%, 95%, or 98%; the reflectance of polarized light perpendicular to the transmission axis of the polarizing reflective film 400 is not less than 85%, and is not less than 90%, 95%, or 98%. For example, the polarizing reflective film 400 may include a dual brightness enhancement film (DBEF), a cholesteric phase-based liquid crystal polymer film, etc.

[0045] For example, such as Figure 1 As shown, the angle between the slow axis of the phase retardation film 300 and the transmission axis of the polarization reflection film 400 is 45 degrees.

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

[0047] For example, such as Figure 1 As shown, the transmission axis of the polarizing transmission film 600 coincides with the transmission axis of the polarizing reflection film 400. The polarizing transmission film 600 can be a linearly polarizing film to further filter out other stray light, allowing only polarized light (such as S-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) with added dichroic molecules, liquid crystal polymer film with added dichroic molecules, etc.

[0048] like Figure 1As shown, the optical structure provided in this disclosure employs an ultra-short focal length folded optical path (Pancake). The principle of the folded optical path is as follows: A waveplate can be placed on the light-emitting side of the display screen located on the side of the lens 100 away from the light-transmitting plate 500. The image light emitted from the display screen is converted into right-hand circularly polarized light after passing through the waveplate. The polarization state of the right-hand circularly polarized light remains unchanged after being transmitted through the transmission-reflection film 200. After being transmitted through the lens 100, the right-hand circularly polarized light reaches the phase retardation film 300. The right-hand circularly polarized light incident on the phase retardation film 300 is converted into p-linearly polarized light. The p-linearly polarized light is reflected back to the phase retardation film 300 by the polarization reflection film 400, where the first reflection occurs. Then, the p-linearly polarized light is converted into right-hand circularly polarized light after passing through the phase retardation film 300. This right-hand circularly polarized light is transmitted through the lens 100 and reaches the transmission-reflection film 200, where it is reflected, where the second reflection occurs. Due to half-wave loss, the reflected light changes from right-hand circularly polarized light to left-hand circularly polarized light. Left-handed circularly polarized light is transmitted through lens 100 and reaches phase retardation film 300. The left-handed circularly polarized light is converted into s-linearly polarized light by phase retardation film 300. Then, the s-linearly polarized light is transmitted through polarization reflection film 400 and polarization transmission film 600 and then shines into the human eye.

[0049] The aforementioned folded optical path can change the polarization state of light propagating between the polarizing reflective film and the transmissive film, thereby achieving light folding. This folds the focal length of the optical structure, which would otherwise be increased by two reflections due to the polarizing reflective film, phase retardation film, and transmissive film, thus greatly compressing the space required between the human eye and the optical structure, making the optical structure smaller and thinner.

[0050] The optical structure provided in this embodiment is a folded optical path (Pancake) optical structure. In this optical structure, both surfaces of the lens are non-planar, and a phase retardation film is placed on the lens. At the same time, a light-transmitting plate is set to place a polarizing reflection film on the light-transmitting plate. This improves the design freedom of the optical structure to enhance display performance, including sharpness and field of view, and reduces the thickness of the optical structure by folding the longer optical path. It does not significantly increase the cost of the optical structure or the difficulty of manufacturing process, and it is also beneficial to reduce ghosting.

[0051] For example, in a pancake structure, ghosting and stray light are key indicators affecting the user experience. In optical structures employing a folded optical path (Pancake), fluctuations in the angles between the films, especially between the phase retardation film and the polarizing reflective film—such as the angle between the slow axis of the phase retardation film and the transmission axis of the polarizing reflective film not being precisely 45 degrees—are major factors causing stray light and ghosting. By separately placing the phase retardation film and the polarizing reflective film on the lens and the light-transmitting plate, it is convenient to separately bond the phase retardation film and the polarizing reflective film. During the bonding process, the optical axis of the phase retardation film can be corrected. For example, a polarization sensor can be used to determine the direction with a 45-degree angle to the transmission axis of the polarizing reflective film, such as the direction with the greatest circular deflection of the polarization state, and then the phase retardation film can be bonded. The aforementioned positioning of the phase retardation film and the polarizing reflective film helps to reduce stray light and ghosting.

[0052] For example, attaching a polarizing reflective film to a flat plate surface with a planar shape can improve the flatness of the film material and avoid the softening and stretching process of the film material from affecting the shift of its birefringence properties. This is beneficial to improving the overall 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 retardation film 300 is attached to the second surface 120 of the lens 100 for ease of manufacturing and to reduce costs.

[0054] Figure 2 This is a partial structural schematic diagram 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 differs in that it also includes a phase compensation film 700. Figure 2 The optical structure shown includes a lens 100, a transmissive coating 200, a phase retardation coating 300, a polarizing reflective coating 400, a light-transmitting plate 500, and a polarizing transmission coating 600. Figure 1 The lens 100, the transflective coating 200, the phase retardation coating 300, the polarizing reflective coating 400, the light-transmitting plate 500, and the polarizing transmission coating 600 in the optical structure shown have the same characteristics, which will not be described in detail here.

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

[0056] For example, such as 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 in the thickness direction of the phase retardation film, making the retardation relatively stable and thus improving the polarization conversion efficiency. For example, the phase compensation film 700 can be a negative C-type phase retardation compensation film, such as using polyarylic ester, to have a negative phase retardation in the thickness direction. Of course, the embodiments of this disclosure are not limited to this; 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, such as Figure 2 As shown, the phase compensation film 700 is disposed on the surface of the phase delay film 300 away from the transmissive and reflective film 200.

[0058] Figure 3 This is a partial structural schematic diagram 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 optical structure shown is different in that it also includes a first antireflective film 810, a second antireflective film 820, and a third antireflective film 830. Figure 3 The optical structure shown includes a lens 100, a transmissive coating 200, a phase retardation coating 300, a polarizing reflective coating 400, a light-transmitting plate 500, and a polarizing transmission coating 600. Figure 1 The lens 100, the transflective coating 200, the phase retardation coating 300, the polarizing reflective coating 400, the light-transmitting plate 500, and the polarizing transmission coating 600 in the optical structure shown have the same characteristics, which will not be described in detail here. 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 characteristics, which will not be described again here.

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

[0060] For example, such as Figure 3 As shown, the first antireflective coating 810, the second antireflective coating 820, and the third antireflective coating 830 can be made of the same material. For example, at least one of the first antireflective coating 810, the second antireflective coating 820, and the third antireflective coating 830 can be processed onto the lens 100 or the light-transmitting plate 500 by coating or physical deposition. For example, the coating process of at least one of the first antireflective coating 810, the second antireflective coating 820, and the third antireflective coating 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, both the phase retardation film 300 and the phase compensation film 700 are located on the second surface 120 of the lens 100. The first antireflection film 810 is located on the surface of the phase compensation film 700 away from the phase retardation film 300, such as the first antireflection film 810 being formed on the surface of the phase compensation film 700. The polarization transmission film 600 is located on the side of the polarization reflection film 400 away from the phase retardation film 300. The polarization reflection film 400 is located on the side of the light-transmitting plate 500 away from the lens 100. The second antireflection film 820 is located on the surface of the light-transmitting plate 500 close to the lens 100, such as the second antireflection film 820 being formed on the surface of the light-transmitting plate 500 close to the lens 100. The third antireflection film 830 is located on the surface of the polarization transmission film 600 away from the lens 100, such as the third antireflection film 830 being formed on the surface of the polarization transmission film 600.

[0062] Figure 4 This is a partial structural schematic diagram 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 difference in the optical structure shown is that the position of the phase compensation film 700 is different. Figure 4 The optical structure shown includes a lens 100, a transmissive coating 200, a phase retardation coating 300, a polarizing reflective coating 400, a light-transmitting plate 500, and a polarizing transmission coating 600. Figure 1 The lens 100, the transflective coating 200, the phase retardation coating 300, the polarizing reflective coating 400, the light-transmitting plate 500, and the polarizing transmission coating 600 in the optical structure shown have the same characteristics, which will not be described in detail here. 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 characteristics, which will not be described again 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 of a phase compensation film 700 located on a light-transmitting plate 500 is shown schematically.

[0064] In some examples, such as Figure 4 As 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, and the first anti-reflection film 810 is located on the surface of the phase retardation film 300 away from the light-transmitting film 200; the polarizing transmission film 600 is located on the side of the polarizing reflection film 400 away from the phase retardation film 300, and the polarizing reflection film 400 is located on the side of the light-transmitting plate 500 away from the lens 100. For example, the polarizing reflection film 400, the polarizing 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 retardation 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 polarizing transmission film 600 away from the lens 100.

[0065] Figure 5 This is a partial structural schematic diagram 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 difference in the optical structure shown is that the position of the phase compensation film 700 is different. Figure 5 The optical structure shown includes a lens 100, a transmissive coating 200, a phase retardation coating 300, a polarizing reflective coating 400, a light-transmitting plate 500, and a polarizing transmission coating 600. Figure 1 The lens 100, the transflective coating 200, the phase retardation coating 300, the polarizing reflective coating 400, the light-transmitting plate 500, and the polarizing transmission coating 600 in the optical structure shown have the same characteristics, which will not be described in detail here. 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 characteristics, which will not be described again 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 of a phase compensation film 700 located on a light-transmitting plate 500 is shown schematically.

[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, and the first anti-reflection film 810 is located on the surface of the phase retardation film 300 away from the light-transmitting film 200; the polarizing transmission film 600 is located on the side of the polarizing reflection film 400 away from the phase retardation film 300, and the polarizing transmission film 600 is located on the side of the light-transmitting plate 500 close to the lens 100; the phase compensation film 700 is located between the polarizing reflection film 400 and the lens 100, such that the phase compensation film 700, the polarizing reflection film 400, and the polarizing 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 placing the phase compensation film, the polarizing reflection film, and the polarizing transmission film between the light-transmitting plate and the lens, the above-mentioned film layers can be protected to prevent the user from contacting these film layers.

[0068] Of course, the embodiments disclosed herein are not limited to Figures 1 to 5 The light-transmitting plate in the optical structure shown is a single plate. However, the light-transmitting plate may include multiple plates, each with multiple plate surfaces. The polarizing reflection film, polarizing transmission film, second antireflection film, and third antireflection film can all be disposed on the corresponding plate surfaces. The film layers located between adjacent plates and the film layers located on the outermost plate surface among the multiple plate surfaces can all be referred to as being located on the light-transmitting plate.

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

[0070] For example, such as Figures 1 to 5 As shown, lens 100 is an aspherical monolithic 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 panel provided in this disclosure can be made of glass, such as optical glass. Compared to a few types of optical plastics, the refractive index and dispersion characteristics of optical glass can be selected within a wider range. For example, the refractive index of optical glass can be 1.4 to 2.2, and the Abbe number of optical glass can be 20 to 90. By flexibly selecting the glass material, a certain degree of dispersion compensation can be achieved, which is beneficial for display devices using this optical structure to have better display performance.

[0072] For example, Figures 1 to 5 The diagram schematically shows that the polarizing reflective film 400 and the polarizing transmittance film 600 are located on the same side of the light-transmitting plate 500. The bonding process is simple and helps to save costs.

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

[0074] Figure 6 This is a partial structural schematic diagram 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 difference in the optical structure shown is that the position of the phase retardation film 300 is different. Figure 6 The optical structure shown includes a lens 100, a transmissive coating 200, a phase retardation coating 300, a polarizing reflective coating 400, a light-transmitting plate 500, and a polarizing transmission coating 600. Figure 1 The lens 100, the transflective coating 200, the phase retardation coating 300, the polarizing reflective coating 400, the light-transmitting plate 500, and the polarizing transmission coating 600 in the optical structure shown have the same characteristics, which will not be described in detail here. 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 characteristics, which will not be described again here.

[0075] In some examples, such as Figure 6 As shown, the phase retardation film 300 is located inside the lens 100. Figure 6 An example is shown where the phase retardation film 300 is located inside the lens 100. For example, the phase retardation film 300 can be in direct contact with the lens 100, or no adhesive layer may be provided between the phase retardation film 300 and the lens 100, or the two parts located on either side of the phase retardation film 300 in the lens 100 may be two integral parts of the lens 100, forming a single structure during the lens 100 formation process. For example, direct contact between the surface of the phase retardation film 300 and the lens 100 means that the phase retardation film 300 is wrapped by the lens 100, and during the lens 100 formation process, the phase retardation film 300 is surrounded by the fluid material forming the lens 100. For example, the phase retardation film 300 may be embedded inside the lens 100.

[0076] By placing the phase retardation film inside the lens to achieve integrated formation of the phase retardation film and the lens, the use of a bonding medium is eliminated. This helps to avoid the impact of the bonding process on the optical performance of the phase retardation film, thereby improving the reliability of the optical structure.

[0077] For example, a light-transmitting support plate (not shown) may be disposed inside the lens 100, with a phase retardation film located on the light-transmitting support plate. For example, the phase retardation 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 helps to reduce 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 lens 100 includes optical resin. For example, the material of lens 100 includes thermosetting or UV-curable optical resin. For example, the main resin of optical resin includes epoxy, epoxy acrylate, polyurethane, polyurea-polyurethane, allyl diethylene glycol carbonate, polyester, etc., and the embodiments disclosed herein are not limited thereto.

[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 antireflection film 810 is located on the surface of the phase compensation film 700 away from the phase retardation film 300, the polarization reflection film 400 is located on the side of the light-transmitting plate 500 away from the lens 100, the second antireflection film 820 is located on the surface of the light-transmitting plate 500 close to the lens 100, and the third antireflection film 830 is located on the surface of the polarization transmission film 600 away from the lens 100.

[0080] Figure 7 This is a partial structural schematic diagram 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 difference in the optical structure shown is that the position of the phase compensation film 700 is different. Figure 7 The optical structure shown includes a lens 100, a transmissive coating 200, a phase retardation coating 300, a polarizing reflective coating 400, a light-transmitting plate 500, and a polarizing transmission coating 600. Figure 1 The lens 100, the transflective coating 200, the phase retardation coating 300, the polarizing reflective coating 400, the light-transmitting plate 500, and the polarizing transmission coating 600 in the optical structure shown have the same characteristics, which will not be described in detail here. 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 characteristics, which will not be described again here.

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

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

[0083] For example, Figures 6 to 7 The diagram schematically shows that the polarizing reflective film 400 and the polarizing transmittance film 600 are located on the same side of the light-transmitting plate 500, such as both being located on the side of the light-transmitting plate 500 away from the lens 100. However, it is not limited to this. For example, the polarizing reflective film and the polarizing transmittance film can also be located on opposite sides of the light-transmitting plate 500, or the polarizing reflective film and the polarizing transmittance film can both be located between the light-transmitting plate and the lens.

[0084] Figure 8 This is a simulation diagram of an optical structure for displaying images. Figure 9 According to Figure 3 The image simulation of the optical structure shown is shown.

[0085] Figure 8 This is a simulated image of the optical structure when the phase retardation film, polarization reflection film, and polarization transmission film are all placed on a light-transmitting plate, as shown in the image. Figure 8 and Figure 9 As shown in the image, the white bright spot in the center is the target image. The light spots around the bright spot are caused by ghosting and stray light when the optical structure is applied to the display device. This can be seen from the image. Figure 9 The light spot around the bright spot in the simulation image shown is relative to... Figure 8 In the simulation diagram shown, the light spot around the bright spot is relatively light. Therefore, in the optical structure provided in this disclosure, by setting the phase retardation film in the lens assembly and setting both the polarization reflection film and the polarization transmission film in the light-transmitting plate assembly, ghosting and stray light phenomena can be reduced.

[0086] In their research, the inventors of this application discovered that the angle between the slow axis of the phase retardation film and the transmission axis of the polarizing reflective film has a significant impact on the ghosting phenomenon. This angle is affected by the bonding tolerances between the polarizing reflective film and the light-transmitting plate, the bonding tolerances between the phase retardation film and the lens, and the assembly tolerances of the lens and the light-transmitting plate into the lens barrel. For example, before the polarizing reflective film is bonded to the light-transmitting plate, the plate is pre-set to set the bonding angle. However, during the actual bonding process, a certain bonding tolerance, such as an angle deviation (less than 0.2°), will occur. Similarly, before the phase retardation film is bonded to the lens, the lens is pre-set to set the bonding angle. However, during the actual bonding process, a certain bonding tolerance, such as an angle deviation (less than 0.2°), will occur. When optical structures are used in display devices, they are placed in the lens barrel of the lens assembly. During the process of assembling the lenses and light-transmitting plates in the optical structure into the lens barrel, there will be certain assembly tolerances.

[0087] To address the aforementioned assembly tolerances, an active alignment scheme is adopted. However, using an optical alignment scheme that measures the polarization angle of the emitted light would result in excessively high costs.

[0088] Figure 10 This is a diagram showing the ideal positional relationship between a lens and a light-transmitting plate in an optical structure. Figure 11 for Figure 10 The diagram shows the positional relationship between the lens and the light-transmitting plate in the optical structure under actual conditions. Figure 10 and Figure 11 A diagram showing the stacking relationship between lens 100 and light-transmitting plate 500 is provided, with the optical axis of lens 100 perpendicular to the surface of the paper.

[0089] For example, such as Figure 10 and Figure 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° under ideal conditions. However, during the conventional alignment and assembly process, at least one of the lens 100 and the light-transmitting plate 500 will rotate to a certain extent, such as rotating in the opposite direction relative to the lens barrel 30. This causes the angle θ2 between the edge L2 of the lens 100 and the edge L1 of the light-transmitting plate 500 to be greater than 2°, thereby affecting the angle between the slow axis of the phase retardation film and the light transmission axis of the polarization reflection film, and exacerbating the ghosting phenomenon.

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

[0091] In some examples, such as Figure 12 and Figure 13 As shown, the outline of the lens 100 includes a first positioning angle 101, and the outline 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 both the first positioning angle 101 and the second positioning angle 502 are 80 to 100 degrees.

[0092] For example, such as Figure 12 and Figure 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° under ideal conditions. By positioning with 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 disclosed herein, 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, helps to reduce the assembly tolerance of the lens and the light-transmitting plate without increasing costs, thereby alleviating the ghosting phenomenon.

[0094] For example, such as Figure 12 and Figure 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 can both be 85 to 95 degrees, such as 90 degrees, and the first positioning angle 101 and the second positioning angle 503 can both be right angles.

[0095] For example, such as Figure 12 and Figure 13 As shown, the lens 100 may include one first positioning angle 101, two first positioning angles 101, or more first positioning angles 101. Figure 12 and Figure 13 The diagram schematically illustrates that the lens includes two first positioning angles. In this case, one first positioning angle can play a primary positioning role, while the other plays a secondary positioning role. For example, the light-transmitting plate 500 may include one second positioning angle 503, two second positioning angles 502, or more second positioning angles 502. Figure 12 and Figure 13 The schematic diagram shows that the light-transmitting plate includes two second positioning angles. At this time, one second positioning angle can play a primary positioning role, while the other second positioning angle plays an auxiliary positioning role.

[0096] Figure 12 and Figure 13A lens assembly according to another embodiment of the present disclosure is shown, the lens assembly including a lens barrel 30 and an optical structure located within the lens barrel 30, the optical structure being the optical structure shown in any of the examples above.

[0097] like Figure 12 and Figure 13 As shown, the optical structure is located inside the lens barrel 30. The outline of the lens 100 includes a first positioning angle 101, and the outline of the light-transmitting plate 500 includes a second positioning angle 502. The lens barrel 30 is configured to have a third positioning angle 31 at the position where the optical structure is placed. The first positioning angle 101 and the third positioning angle 31 are positioned together, and the second positioning angle 502 and the third positioning angle 31 are positioned together.

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

[0099] In some examples, such as Figure 12 and Figure 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, such as Figure 12 and Figure 13 As shown, the first positioning angle 101, the second positioning angle 502, and the third positioning angle 31 are all between 85 and 95 degrees, such as 90 degrees. The first positioning angle 101, the second positioning angle 502, 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, such as Figure 12 and Figure 13 As shown, during the assembly process, the included angles between the edge L12 of the lens 100 and the edge L11 of the light-transmitting plate 500 and the corresponding edges of the lens barrel are all less than 0.5°.

[0102] For example, such as Figure 12 and Figure 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. Two of the third positioning angles 31 in the lens barrel 30 are used for positioning with the two first positioning angles 101, and the other two third positioning angles 31 in the lens barrel 30 are used for positioning with the two second positioning angles 502. For example, a straight line extending parallel to the optical axis of the lens 100 passes through one first positioning angle 101, one second positioning angle 502, and the second and third positioning angles 31. For example, when the two third positioning angles 31 in the lens barrel 30 are positioned with one first positioning angle 101 of the lens 100 and one second positioning angle 502 of the light-transmitting plate 500, the other two third positioning angles 31 in the lens barrel 30 have a certain engagement relationship with the other first positioning angle 101 of the lens 100 and the other second positioning angle 502 of the light-transmitting plate 500, respectively, to prevent the lens and the light-transmitting plate from rotating by a large angle relative to the lens barrel.

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

[0104] For example, such as Figure 14 As shown, the display surface of the display screen 40 is located on the focal plane of the light-incident side of the optical structure.

[0105] For example, such as Figure 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 can be a virtual reality (VR) display device. For instance, a virtual reality display device can be a display device employing an ultra-short-throw folded optical path.

[0107] For example, the display device can be a near-eye display device, such as a wearable VR helmet or VR glasses, but the embodiments disclosed herein are not limited thereto.

[0108] Figure 15 This is a partial structural schematic diagram of a display device according to another embodiment of the present disclosure. Figure 15 As shown, the display device includes a display screen 40 and the aforementioned lens assembly, with the display screen 40 located on the side of the lens 100 away from the light-transmitting flat panel assembly 20. Figure 15 The optical structure is shown schematically. Figure 3 The optical structure shown is not limited to this and can be any of the optical structures in the examples above.

[0109] For example, such as Figure 15 As shown, the display surface of the display screen 40 is located on the focal plane of the light-incident side of the optical structure.

[0110] For example, such as Figure 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 can be a virtual reality (VR) display device. For instance, a virtual reality display device can be a display device employing an ultra-short-throw folded optical path.

[0112] For example, the display device can be a near-eye display device, such as a wearable VR helmet or VR glasses, but the embodiments disclosed herein are not limited thereto.

[0113] The following points need to be explained:

[0114] (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure, and other structures can be referred to the general design.

[0115] (2) Where there is no conflict, features of the same embodiment and different embodiments of this disclosure may be combined with each other.

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

Claims

1. An optical structure comprising: A lens assembly includes a lens and a reflective coating, the lens including a first surface and a second surface, both the first surface and the second surface being non-planar, and the reflective coating being located on the first surface; The optical structure further includes a light-transmitting plate assembly, which comprises a light-transmitting plate and a polarizing reflective film. The polarizing reflective film is located on the light-transmitting plate, and the light-transmitting plate assembly is located on the side of the lens away from the reflective film. The optical axis of the lens is perpendicular to the main surface of the light-transmitting plate. The polarizing reflective film is configured to reflect one type of polarized light and transmit another type of polarized light. The lens assembly further includes a phase retardation film, which is located between the polarizing reflective film and the transmission reflective film, and at least a portion of the lens is disposed between the phase retardation film and the transmission reflective film; The phase retardation film and the polarization reflection film are bonded separately.

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

3. The optical structure according to claim 1, wherein, The phase retardation film is located inside the lens and is in direct contact with the lens.

4. The optical structure according to claim 1, wherein, The light-transmitting plate assembly also includes a polarizing transmission film located on the side of the polarizing reflection film away from the phase retardation film, and disposed on the light-transmitting plate.

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

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

7. The optical structure according to claim 1, further comprising: A first antireflective coating is located on the second surface of the lens. At least one film layer is disposed on the second surface. The first antireflective coating is the film layer closest to the light-transmitting flat panel assembly among the at least one film layer. The second antireflective coating is located on the surface of the light-transmitting plate near the lens. At least one film layer is disposed on the surface of the plate, and the second antireflective coating is the film layer closest to the lens assembly among the at least one film layer. The third antireflective coating is located on the surface of the light-transmitting plate away from the lens. At least one film layer is disposed on the surface of the plate, and the third antireflective coating is the film layer that is furthest 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 is located between the phase retardation film and the polarization reflection film. The phase retardation film and the phase compensation film are both located on the second surface, and the first antireflection film is located on the surface of the phase compensation film away from the phase retardation film. The light-transmitting plate assembly further includes a polarizing transmission film located on the side of the polarizing reflection film away from the phase retardation film. The polarizing reflection 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. The third anti-reflection film is located on the surface of the polarizing transmission film away from the lens.

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

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

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

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

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 1-12, wherein, The display screen is located on the 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 of claim 13, wherein, The display screen is located on the side of the lens assembly away from the light-transmitting flat panel assembly.

Images