VR optical structure and electronic equipment

Abstract

This invention discloses a VR optical structure, which, from the object side to the image side, sequentially includes: a first lens, a second lens, an anti-reflection component, and a display panel. The display panel is provided with a first quarter-wave plate. The anti-reflection component, from the object side to the image side, sequentially includes a first anti-reflection film, a second quarter-wave plate, a first linear polarizing film, and a third quarter-wave plate. The rotation angles of the first and second quarter-wave plates are the same, and the difference between the rotation angles of the first and third quarter-wave plates is 90°. This VR optical structure eliminates the need for a film on the display panel, effectively reducing stray light generated by reflection and improving image quality. This invention also discloses an electronic device, including a device body and the aforementioned VR optical structure, wherein the VR optical structure is disposed on the device body.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of optical technology, and in particular to a VR optical structure and electronic device. Background Technology

[0002] VR (Virtual Reality) uses computers to create a three-dimensional virtual world, providing users with interactive visual, tactile, and auditory experiences. This allows users to feel immersed in the virtual world, observe objects in three-dimensional space, and interact with them. VR devices typically have an internal display panel, and internal optical components use light to create VR images from the displayed content. Because the VR device's display panel is very close to the user, the optical components use refraction and other methods to make the displayed content appear as if it were far away, thus magnifying objects for viewing from a distance and achieving a holographic view.

[0003] However, since both the lenses and display panels are in contact with air and have a certain degree of reflectivity, VR devices generate unnecessary stray light during imaging, resulting in poor image quality. Currently, AR (Anti-Reflection) films are generally applied to the display panels to reduce their reflectivity, but the actual anti-reflection effect is not good. Furthermore, for manufacturers, mass application of films increases manufacturing costs. Therefore, some manufacturers' screens do not have AR films applied at the factory, and users applying films themselves can easily damage the display panels. Summary of the Invention

[0004] The purpose of this invention is to provide a VR optical structure and electronic device that does not require a film to be applied to the display panel, effectively reducing stray light generated by reflection in the VR optical structure and improving image quality.

[0005] To address the aforementioned technical problems, a first aspect of the present invention provides a VR optical structure, which comprises, from the object side to the image side, the following components in sequence:

[0006] The system comprises a first lens, a second lens, an anti-reflection assembly, and a display panel, wherein the display panel is provided with a first quarter-wave plate; the anti-reflection assembly includes, from the object side to the image side, a first anti-reflection film, a second quarter-wave plate, a first linear polarizing film, and a third quarter-wave plate; wherein the rotation angle of the first quarter-wave plate and the rotation angle of the second quarter-wave plate are the same, and the difference between the rotation angle of the first quarter-wave plate and the rotation angle of the third quarter-wave plate is 90°.

[0007] A second aspect of the present invention also provides an electronic device, comprising:

[0008] The device body and the VR optical structure of the first aspect described above, wherein the VR optical structure is disposed on the device body.

[0009] Optionally, it also includes a fourth quarter-wave plate, which is disposed on the object side of the second lens, and the rotation angle of the fourth quarter-wave plate is the same as the rotation angle of the first quarter-wave plate.

[0010] Optionally, a second anti-reflective film may also be included, which is disposed on the side of the fourth quarter-wave plate opposite to the second lens.

[0011] Optionally, it also includes a polarizing beam splitter and a third anti-reflection film, wherein the polarizing beam splitter is disposed on the image side of the first lens, and the third anti-reflection film is disposed on the side of the polarizing beam splitter that is away from the first lens.

[0012] Optionally, it also includes a polarizing beam-splitting film and a fifth quarter-wave plate, wherein the polarizing beam-splitting film is disposed on the image-side of the first lens, and the fifth quarter-wave plate is disposed on the side of the polarizing beam-splitting film opposite to the first lens.

[0013] Optionally, a fourth anti-reflective film may also be included, which is disposed on the side of the fifth quarter film opposite to the first lens.

[0014] Optionally, a second linear polarizing film is also included, which is sandwiched between the first quarter-wave plate and the display panel.

[0015] Optionally, the first quarter-wave plate is rotated at an angle of 55°.

[0016] Optionally, the second quarter-wave plate has a rotation angle of 55°, and the third quarter-wave plate has a rotation angle of 145°.

[0017] Compared to related technologies, the embodiments of the present invention provide an anti-reflection component between the second lens and the display panel. The display panel has a first quarter-wave plate. The anti-reflection component adds a second quarter-wave plate, a first linear polarizing film, and a third quarter-wave plate to the AR film. The first and second quarter-wave plates have the same rotation angle, while the first and third quarter-wave plates have different rotation angles. Light emitted from the display panel is polarized by the first quarter-wave plate, then passes through the third quarter-wave plate and the first linear polarizing film, and is then polarized again by the second quarter-wave plate, restoring the light to its original state as emitted from the display panel. Light reflected by the first lens, after passing through the second quarter-wave plate, has a polarization angle perpendicular to the polarization angle of the first linear polarizing film and cannot pass through it. Therefore, the reflectivity of the VR optical structure can be reduced, stray light generated by reflection can be reduced, and image quality can be improved. Attached Figure Description

[0018] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0019] Figure 1 This is a schematic diagram of an existing VR optical structure;

[0020] Figure 2 yes Figure 1 A schematic diagram of the VR optical structure in the diagram;

[0021] Figure 3 This is a schematic diagram of the VR optical structure in the first embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of another existing VR optical structure;

[0023] Figure 5 yes Figure 4 A schematic diagram of the light path of the VR optical structure in the image;

[0024] Figure 6 yes Figure 5 A schematic diagram of the ray path for stray light path 1 in the diagram;

[0025] Figure 7 This is a schematic diagram of the VR optical structure blocking stray light path 1 in the second embodiment of the present invention;

[0026] Figure 8 yes Figure 5 A schematic diagram of the ray path for stray light path 3 in the diagram;

[0027] Figure 9 This is a schematic diagram of the VR optical structure blocking stray light path 3 in the second embodiment of the present invention. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of the present invention to enable the reader to better understand this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments.

[0029] In embodiments of the present invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing the present invention and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0030] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0031] Furthermore, the terms "installation," "setting," "equipped with," "opening," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention according to the specific circumstances.

[0032] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0033] It should be noted that in this invention, "vertical" not only refers to a 90° angle, but also includes angles around 90°, such as the range of 80° to 100°.

[0034] Figure 1 This is a schematic diagram of a conventional VR optical structure, showing a VR optical structure without an anti-reflective coating on the display panel. The VR optical structure, from the object side to the image side, includes a first lens 100, a second lens 200, and a display panel 400. The image-side surface of the first lens 100, from the object side towards the image side, is provided with a fifth quarter-wave plate 130, a third linear polarizer 140, a first polarization beamsplitter 110, and a third anti-reflective coating 120. The object-side surface of the second lens 200, from the object side towards the image side, is provided with a second anti-reflective coating 230 and a fourth quarter-wave plate 220, and the image-side surface of the second lens 200 is provided with a first beamsplitter 210. The object-side surface of the display panel 400, from the object side towards the image side, is provided with a first quarter-wave plate 410 and a second linear polarizer 420. Light emitted from the display panel 400 is converted into linearly polarized light by the second linear polarizing film 420. The linearly polarized light is then converted into circularly polarized light by the first quarter-wave plate 410. After passing through the second lens 200, the circularly polarized light passes through the fourth quarter-wave plate 220 and is converted back into linearly polarized light. It is then reflected at the first polarizing beam splitter 110 and re-converted into circularly polarized light by the fourth quarter-wave plate 220. Ideally, the light is reflected by the first beam splitter 210 and exits from the first lens 100, entering the user's eye. Figure 1 The solid line optical path is shown. However, in reality, some light rays pass through the first beam-splitting film 210 and then propagate again to the first quarter-wave plate 410 where they are reflected, as shown... Figure 1 As shown by the dashed line optical path, this light ray is repeatedly reflected in the VR optical structure, resulting in a lot of stray light in the VR optical structure, which affects the imaging quality of the VR optical structure.

[0035] It should be noted that an aperture stop 500 is also provided on the object side of the first lens 100, through which the user observes the image formed by the VR optical structure. Generally, the distance between the aperture stop 500 and the object side of the first lens 100 is between 13 mm and 18 mm, for example, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, or other sizes. Furthermore, in the following figures, only the light path diagram of stray light passing through the first beam-splitting film 210 is shown.

[0036] Figure 2 The above-mentioned VR optical structure is shown in Table 1. Figure 1The image shows the intensity data of different colors of light in the VR optical structure. It can be seen that the reflection from the display panel 400 causes stray light path 1, and its intensity accounts for 1.8833%. The reflection from the display panel 400 causes stray light path 3, and its intensity accounts for 2.0399%.

[0037] Table 1

[0038] path color energy Normalized energy 2 blue 0.11993 1.0000 1 red 0.0024466 0.020399 3 green 0.0022587 0.018833 6 yellow 1.4492e-05 0.00012083 4 orange 1.3569e-06 0.00011314 5 purple 6.1514e-05 5.1290e-05 7 Light blue 8.9131e-08 7.4317e-07

[0039] One embodiment of the present invention relates to a VR optical structure, which, from the object side to the image side, sequentially includes: a first lens, a second lens, an anti-reflection component, and a display panel. The display panel is provided with a first quarter-wave plate. The anti-reflection component, from the object side to the image side, sequentially includes a first anti-reflection film, a second quarter-wave plate, a first linear polarizing film, and a third quarter-wave plate. The rotation angles of the first quarter-wave plate and the second quarter-wave plate are the same, and the difference between the rotation angles of the first quarter-wave plate and the third quarter-wave plate is 90°. Compared with the prior art, this embodiment provides an anti-reflection component between the second lens and the display panel. The display panel is provided with a first quarter-wave plate. The anti-reflection component adds a second quarter-wave plate, a first linear polarizing film, and a third quarter-wave plate to the AR film. The first and second quarter-wave plates have the same rotation angle, while the rotation angles of the first and third quarter-wave plates are different. The light emitted from the display panel is polarized by the first quarter-wave plate, then passes through the third quarter-wave plate and the first linear polarizing film, and is then polarized by the second quarter-wave plate to restore the light to the state emitted from the display panel, ensuring normal imaging. The light reflected by the first lens passes through the second quarter-wave plate, and the polarization angle of the reflected light is perpendicular to the polarization angle of the first linear polarizing film, so it cannot pass through the first linear polarizing film. Therefore, the reflectivity of the VR optical structure can be reduced, stray light generated by reflection can be reduced, and the imaging quality can be improved.

[0040] It should be noted that the polarization angle of the reflected light being perpendicular to the polarization angle of the first linear polarizing film means that the polarization angle of the reflected light is perpendicular to the polarization angle of the light transmitted through the first linear polarizing film. Furthermore, the rotation angle refers to the rotation angle of the fast optical axis of the quarter-wave plate relative to the transmission axis of the screen linear polarizer, such as a deflection of 45°, -45°, etc.

[0041] In other words, this invention incorporates a separate anti-reflection component within the VR optical structure. This component reduces the overall reflectivity of the VR optical structure, preventing reflected light from repeatedly reflecting and propagating, thereby reducing stray light generated by reflection and improving the imaging quality of the VR optical structure. Furthermore, it eliminates the need for manufacturers or users to apply a protective film to the display panel, reducing the manufacturing cost of VR devices and avoiding damage to the display panel during film application.

[0042] The implementation details of the VR optical structure in this embodiment are described below. The following content is only for the convenience of understanding and is not necessary for implementing this solution.

[0043] The VR optical structure in this embodiment is as follows: Figure 3 As shown, the VR optical structure, from the object side to the image side, includes, in sequence, a first lens 100, a second lens 200, an anti-reflection component 300, and a display panel 400. The display panel 400 is provided with a first quarter-wave plate 410. The anti-reflection component 300, from the object side to the image side, includes, in sequence, a first anti-reflection film 310, a second quarter-wave plate 320, a first linear polarizing film 330, and a third quarter-wave plate 340. The rotation angle of the first quarter-wave plate 410 is the same as that of the second quarter-wave plate 320, and the difference between the rotation angle of the first quarter-wave plate 410 and the rotation angle of the third quarter-wave plate 340 is 90°.

[0044] Thus, the light emitted from the display panel 400 is polarized by the first quarter-wave plate 410, then passes through the third quarter-wave plate 340 and the first linear polarizing film 330, and is then polarized by the second quarter-wave plate 320, restoring the light to its original state as emitted from the display panel 400, ensuring normal imaging. The light reflected by the first lens 100, after passing through the second quarter-wave plate 320, has a polarization angle perpendicular to the polarization angle of the first linear polarizing film 330, and cannot pass through the first linear polarizing film 330. Therefore, the reflectivity of the VR optical structure can be reduced, stray light generated by reflection can be reduced, and imaging quality can be improved.

[0045] For example, the light emitted from the display panel 400 is left-handed circularly polarized after passing through the first quarter-wave plate 410, and then converted to linearly polarized light after passing through the third quarter-wave plate 340. At this point, the linearly polarized light can pass through the first linear polarization film 330. Subsequently, the linearly polarized light passes through the second quarter-wave plate 320 and is converted back to left-handed circularly polarized light. In other words, the left-handed circularly polarized light emitted from the display panel 400 remains left-handed circularly polarized light after passing through the anti-reflection component 300. The first anti-reflection film 310 is provided in the anti-reflection component 300 to enhance light transmission, reduce reflectivity, and improve the imaging quality of the VR optical structure.

[0046] In some embodiments, the VR optical structure further includes a second linear polarizing film 420, which is sandwiched between the first quarter-wave plate 410 and the display panel 400.

[0047] Specifically, the light emitted by the display panel 400 is first converted into linearly polarized light by the second linear polarizing film 420, and then converted into circularly polarized light by the first quarter-wave plate 410.

[0048] In some embodiments, the image side of the second lens 200 is provided with a first beam splitter 210. Light passing through the anti-reflection assembly 300 is irradiated by the first beam splitter 210 and split into multiple beams.

[0049] In some embodiments, the VR optical structure further includes a fourth quarter-wave plate 220, which is disposed on the object side of the second lens 200, and the rotation angle of the fourth quarter-wave plate 220 is the same as the rotation angle of the first quarter-wave plate 410.

[0050] In some embodiments, the VR optical structure further includes a second anti-reflective film 230, which is disposed on the side of the fourth quarter-wave plate 220 opposite to the second lens 200.

[0051] Specifically, the second anti-reflective film 230 can further increase the transmittance of the VR optical structure and reduce its reflectance.

[0052] In some embodiments, the VR optical structure further includes a first polarizing beam splitter 110 and a third anti-reflection film 120, wherein the first polarizing beam splitter 110 is disposed on the image side of the first lens 100, and the third anti-reflection film 120 is disposed on the side of the polarizing beam splitter 110 opposite to the first lens 100.

[0053] Because the anti-reflective film has very low reflectivity, its reflection effect can be disregarded in practical applications. Therefore, light emitted from the display panel 400 will be reflected to a certain extent at the first polarizing beam splitter 110. This reflected light will be repeatedly reflected in the VR optical structure, generating unexpected stray light and causing a decrease in the imaging quality of the VR optical structure. In the VR optical structure provided in this embodiment, it can be seen that circularly polarized light, split into multiple beams by the first beam splitter 210, illuminates the fourth quarter-wave plate 220 and is converted into linearly polarized light after passing through the fourth quarter-wave plate 220. The linearly polarized light continues to propagate and passes through the third anti-reflective film 120, undergoes a certain degree of reflection at the first polarizing beam splitter 110, and is converted back into circularly polarized light by the fourth quarter-wave plate 220. The circularly polarized light continues to propagate and is converted into linearly polarized light after passing through the second quarter-wave plate 320. At this point, the linearly polarized light passes through the first linearly polarizing film 330. Linearly polarized light passing through the first linear polarizing film 330 is converted into circularly polarized light by passing through the third quarter-wave plate 340 again. The circularly polarized light is reflected at the first quarter-wave plate 410 and passes through the first quarter-wave plate 410 again, where it is converted into linearly polarized light with a polarization direction perpendicular to the first linear polarizing film 330. This prevents the linearly polarized light from passing through the first linear polarizing film 330, thereby reducing the reflection of the VR optical structure, reducing stray light caused by reflection, and improving imaging quality.

[0054] The third anti-reflective film 120 can further improve the light transmittance of the VR optical structure.

[0055] Furthermore, the VR optical structure also includes a fifth quarter-wave plate 130 and a third linear polarizing film 140. The fifth quarter-wave plate 130 is disposed on the image-side surface of the first lens 100, the third linear polarizing film 140 is disposed on the side of the fifth quarter-wave plate 130 facing away from the first lens 100, and the first polarizing beam-splitting film 110 is disposed on the side of the third linear polarizing film 140 facing away from the first lens 100.

[0056] In one feasible embodiment, the rotation angle of the first polarizing beam splitter 110 on the first lens 100 is 100°, the rotation angle of the fifth quarter-wave plate 130 is 55°, and the rotation angle of the third linear polarizing film 140 is 100°. The rotation angle of the fourth quarter-wave plate 220 on the second lens 200 is 55°. The rotation angle of the second quarter-wave plate 320 of the anti-reflection assembly 300 is 55°, the rotation angle of the first linear polarizing film 330 is 100°, and the rotation angle of the third quarter-wave plate 340 is 145°. The rotation angle of the first quarter-wave plate 410 on the display panel 400 is 55°, and the rotation angle of the second linear polarizing film 420 is 100°.

[0057] Table 2 shows the intensity data of different colors of light in the VR optical structure of the above embodiments. It can be seen that after using the anti-reflection component 300 provided by the present invention, the reflection from the display panel 400 causes stray light path 1, whose intensity accounts for 0.23541%, and the reflection from the display panel 400 causes stray light path 3, whose intensity accounts for 0.21281%. That is, the VR optical structure provided in this embodiment can effectively reduce stray light generated by reflected light compared with the prior art.

[0058] Table 2

[0059] path color energy Normalized energy 2 blue 0.11933 1.0000 1 red 0.00028092 0.0023541 3 green 0.00025395 0.0021281

[0060] Figure 4This is a schematic diagram of another existing VR optical structure, where the anti-reflective film is not applied to the display panel, but instead is placed on the first lens 100. This VR optical structure, from the object side to the image side, includes a first lens 100, a second lens 200, and a display panel 400. The image-side surface of the first lens 100, from the object side towards the image side, is provided with a third linear polarizing film 140, a first polarizing beam splitter 110, a fifth quarter-wave plate 130, and a third anti-reflective film 120, arranged sequentially. The image-side surface of the second lens 200 is provided with a first beam splitter 210. The object-side surface of the display panel 400, from the object side towards the image side, is provided with a first quarter-wave plate 410 and a second linear polarizing film 420, arranged sequentially. The light emitted from the display panel 400 is converted into linearly polarized light by the second linear polarizing film 420. The linearly polarized light is converted into circularly polarized light after passing through the first quarter-wave plate 410. The circularly polarized light passes through the second lens 200 and then passes through the fifth quarter-wave plate 130, where it is converted back into linearly polarized light. It is then reflected at the first polarizing beam splitter 110 and converted back into circularly polarized light by passing through the fifth quarter-wave plate 130 again. The reflected light then propagates again to the first quarter-wave plate 410 and is reflected again. This causes the light to be repeatedly reflected in the VR optical structure, resulting in a lot of stray light in the VR optical structure, which affects the imaging quality of the VR optical structure.

[0061] Similarly, an aperture 500 is provided on the object side of the first lens 100, through which the user observes the image formed by the VR optical structure. Generally, the distance between the aperture 500 and the object side of the first lens 100 is between 13 mm and 18 mm.

[0062] Figure 5 Table 3 shows a schematic diagram of the light path during imaging in the VR optical structure described above. Figure 5 Intensity data of different colors of light. Figure 6 This is a schematic diagram of the ray path for stray light path 1. Figure 7 This is a schematic diagram of the light path for stray light path 3. It can be seen that the reflection from the display panel 400 causes stray light path 1, and its intensity accounts for 1.8832%. The reflection from the display panel 400 causes stray light path 3, and its intensity accounts for 1.7001%.

[0063] Table 3

[0064] path color energy Normalized energy 2 blue 0.11994 1.0000 1 red 0.0022587 0.018832 3 green 0.0020390 0.017001 18 blue 2.1492e-05 0.00017919 20 orange 8.5646e-06 7.1410e-05 19 green 7.5925e-05 6.3304e-05

[0065] against Figure 4 The second embodiment of the present invention provides a VR optical structure, as shown in the film application method. Figure 7As shown, the VR optical structure of this embodiment is largely the same as the VR optical structure of the first embodiment described above. The main difference is that the object side of the second lens 200 in this embodiment does not have the fourth quarter-wave plate 220 and the second anti-reflection film 230, and the positions of the first linear beam splitter 110, the fifth quarter-wave plate 130 and the third linear polarizing film 140 on the first lens 100 are also different.

[0066] In this embodiment, the first polarizing beam splitter 110 is disposed on the image side of the first lens 100, and the fifth quarter-wave plate 130 is disposed on the side of the first polarizing beam splitter 110 opposite to the first lens 100.

[0067] In some embodiments, the third anti-reflective film 120 is disposed on the side of the fifth quarter-wave plate 130 opposite to the first lens 100.

[0068] Furthermore, the third linear polarizing film 140 is disposed on the image side of the first lens 100, and the first linear beam splitter 110 is disposed on the side of the third linear polarizing film 140 opposite to the first lens 100.

[0069] according to Figure 6 As can be seen, the propagation process of stray light path 1 is as follows: the light emitted by the display panel 400 passes through the second lens 200, is reflected at the first linear beam splitter 110, and then propagates to the display panel 400 again for reflection, eventually entering the user's eye and affecting the imaging effect of the VR optical structure.

[0070] Regarding stray light path 1, it is understood that in this embodiment, the circularly polarized light emitted from the display panel 400, after passing through the anti-reflection component 300, is reflected to a certain extent at the first polarizing beam splitter 110 after passing through the fifth quarter-wave plate 130. The reflected light then exits from the fifth quarter-wave plate 130 again, still circularly polarized. After propagating to the second quarter-wave plate 320, the circularly polarized light is converted into linearly polarized light. This linearly polarized light then passes through the first linear polarizing film 330. The linearly polarized light passing through the first linear polarizing film 330 passes through the third quarter-wave plate 340 again and is converted into circularly polarized light. The circularly polarized light is reflected at the first quarter-wave plate 410 and passes through the first quarter-wave plate 410 again, being converted into linearly polarized light with a polarization direction perpendicular to the first linear polarizing film 330. This prevents the linearly polarized light from passing through the first linear polarizing film 330, thereby reducing the reflected light of the VR optical structure.

[0071] according to Figure 8As can be seen, the propagation path of stray light path 3 is as follows: the light emitted by the display panel 400 is reflected at the second lens 200, reflected again at the display panel 400, passes through the second lens 200, and is reflected at the first linear beam splitter 110. The reflected light is reflected at the first beam splitter 210 and finally enters the user's eye, thereby affecting the imaging effect of the VR optical structure.

[0072] For stray light path 3, the light rays reflected at the second lens 200 are converted from circularly polarized light to linearly polarized light with a polarization angle perpendicular to the transmission angle of the first linear polarizing film 330 after passing through the second quarter-wave plate 320 of the anti-reflection component 300. This prevents the stray light from continuing to propagate, thereby reducing the overall reflectivity of the VR optical structure.

[0073] It can be seen that, in addition to having the beneficial effects of the first embodiment described above, this embodiment can also reduce the number of film layers required for the VR optical structure and reduce manufacturing costs.

[0074] In one feasible embodiment, the rotation angle of the first polarizing beam splitter 110 on the first lens 100 is 100°, the rotation angle of the fifth quarter-wave plate 130 is 55°, and the rotation angle of the third linear polarizing film 140 is 100°. In the anti-reflection assembly 300, the rotation angle of the second quarter-wave plate 320 is 55°, the rotation angle of the first linear polarizing film 330 is 100°, and the rotation angle of the third quarter-wave plate 340 is 145°. In the display panel 400, the rotation angle of the first quarter-wave plate 410 is 55°, and the rotation angle of the second linear polarizing film 420 is 100°.

[0075] Table 4 shows the intensity data of different colors of light in the VR optical structure of the above embodiments. It can be seen that after using the anti-reflection component 300 provided by the present invention, the reflection from the display panel 400 causes stray light path 1, whose intensity accounts for 0.23541%, and the reflection from the display panel 400 causes stray light path 3, whose intensity accounts for 0.21251%. That is, the VR optical structure provided in this embodiment can effectively reduce stray light generated by reflected light compared with the prior art.

[0076] Table 4

[0077] path color energy Normalized energy 2 blue 0.12431 1.0000 1 red 0.00029263 0.0023541 3 green 0.00026417 0.0021251

[0078] As can be seen from the above description, by using the solution provided by the present invention, it is not necessary to set an anti-reflective film on the display panel 400, which can avoid damaging the display panel 400. At the same time, it can also reduce the reflectivity of the VR optical structure, thereby reducing stray light generated by reflection and improving the imaging quality.

[0079] It should be noted that the rotation angle of the quarter-wave plate and the polarization angle of the linear polarizer in the embodiments of the present invention are merely examples and do not constitute a limitation on the present invention. In practical applications, the rotation angle of the quarter-wave plate and the polarization angle of the linear polarizer can be adjusted according to actual needs, and these adaptive adjustments should fall within the protection scope of the present invention. Furthermore, the specific stray light path is determined by the actual light source used and the selection method used in the calculation. The stray light paths described in the first and second embodiments of the present invention are the same and are merely illustrative examples, and do not limit the protection scope of the present invention.

[0080] A third embodiment of the present invention provides an electronic device, including a device body and a VR optical structure provided in the first or second embodiment described above, wherein the VR optical structure is disposed on the device body.

[0081] It is understood that the electronic device may be a VR device or other electronic device that uses the VR optical structure provided by the present invention, and the present invention does not specifically limit it.

[0082] The VR optical structure and electronic device provided by the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the idea of ​​the present invention. There may be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A VR optical structure, characterized in that, The VR optical structure, from the object side to the image side, includes, in sequence, a first lens, a second lens, an anti-reflection component, and a display panel. The display panel is provided with a first quarter-wave plate. The anti-reflection component, from the object side to the image side, includes, in sequence, a first anti-reflection film, a second quarter-wave plate, a first linear polarizing film, and a third quarter-wave plate. The rotation angle of the first quarter-wave plate is the same as that of the second quarter-wave plate, and the difference between the rotation angle of the first quarter-wave plate and the rotation angle of the third quarter-wave plate is 90°. The light emitted from the display panel is polarized by the first quarter-wave plate, then passes through the third quarter-wave plate and the first linear polarizing film, and is then polarized by the second quarter-wave plate to restore the light to the state emitted from the display panel. The light reflected by the first lens passes through the second quarter-wave plate and the polarization angle of the reflected light is perpendicular to the polarization angle of the first linear polarizing film, so it cannot pass through the first linear polarizing film.

2. The VR optical structure according to claim 1, characterized in that, It also includes a fourth quarter-wave plate, which is disposed on the object side of the second lens, and the rotation angle of the fourth quarter-wave plate is the same as the rotation angle of the first quarter-wave plate.

3. The VR optical structure according to claim 2, characterized in that, It also includes a second anti-reflective film, which is disposed on the side of the fourth quarter-wave plate opposite to the second lens.

4. The VR optical structure according to claim 2, characterized in that, It also includes a polarizing beam splitter and a third anti-reflection film. The polarizing beam splitter is disposed on the image side of the first lens, and the third anti-reflection film is disposed on the side of the polarizing beam splitter that is away from the first lens.

5. The VR optical structure according to claim 1, characterized in that, It also includes a polarizing beam splitter and a fifth quarter-wave plate. The polarizing beam splitter is disposed on the image side of the first lens, and the fifth quarter-wave plate is disposed on the side of the polarizing beam splitter away from the first lens.

6. The VR optical structure according to claim 5, characterized in that, It also includes a fourth anti-reflective film, which is disposed on the side of the fifth quarter-wave plate opposite to the first lens.

7. The VR optical structure according to any one of claims 1-6, characterized in that, It also includes a second linear polarizing film, which is sandwiched between the first quarter-wave plate and the display panel.

8. The VR optical structure according to any one of claims 1-6, characterized in that, The first quarter-wave plate is rotated at an angle of 55°.

9. The VR optical structure according to any one of claims 1-6, characterized in that, The second quarter-wave plate has a rotation angle of 55°, and the third quarter-wave plate has a rotation angle of 145°.

10. An electronic device, characterized in that, It includes a device body and a VR optical structure as described in any one of claims 1-9, wherein the VR optical structure is disposed on the device body.

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