Near-eye display device and electronic device

Abstract

A near-eye display device and an electronic device. The near-eye display device comprises a first display screen (100), a second display screen (200), and an optical assembly, wherein the optical assembly comprises a polarization beam splitter (310), a reflecting member (320), a concave lens (370), a first wave plate (330), and a light exit lens (340); light emitted by the first display screen (100) passes through the polarization beam splitter (310) to form first emergent light (411), the first emergent light (411) being emitted through the light exit lens (340); and light emitted by the second display screen (200) sequentially passes through the polarization beam splitter (310), the concave lens (370) and the first wave plate (330) and is then reflected by the reflecting member (320) to form first reflected light (421), and the first reflected light (421) sequentially passes through the first wave plate (330) and the concave lens (370) to be incident on the polarization beam splitter (310), and is reflected by the polarization beam splitter (310) to form second emergent light (412), the second emergent light (412) being emitted through the light exit lens (340).

Description

Near-eye display device and electronic device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on November 23, 2023, with application number 202311582388.6 and invention name “Near-eye display device and electronic device”. The entire contents of the Chinese patent application are incorporated herein by reference. Technical Field

[0003] The present application belongs to the field of display technology, and specifically relates to a near-eye display module and electronic equipment. Background Art

[0004] The rapid development of technologies such as virtual reality (VR) and augmented reality (AR) in recent years has gradually satisfied people's pursuit of a better visual experience. These electronic devices are often equipped with head-mounted near-eye displays (NEDs). These NEDs free people's hands, reducing their reliance on screens while also creating a better visual experience.

[0005] In the related art, high-resolution display panels are very expensive, resulting in high costs for near-eye display devices and electronic devices. To improve the resolution of near-eye display devices while reducing the costs of near-eye display devices and electronic devices, the near-eye display devices in the related art include two display screens and an optical mechanism. The first display screen can provide a wide field of view, and the second display screen can decompose light through the optical mechanism to provide ultra-high resolution for the central eye socket area. Therefore, the near-eye display devices in the related art improve resolution while also reducing manufacturing costs.

[0006] However, because the second display screen needs to undergo multiple reflections and refractions through an optical mechanism, the brightness of the light emitted from the second display screen is lower. Therefore, in order to make the brightness of the light emitted from the second display screen close to that of the first display screen, the light efficiency of the second display screen needs to be improved. Therefore, the second display screen needs to be a higher brightness display screen, which inevitably increases the power consumption of the second display screen. Therefore, the power consumption of the near-eye display device in the related art is relatively high. Summary of the Invention

[0007] The purpose of the embodiments of the present application is to provide a near-eye display device and an electronic device, which can solve the problem of high power consumption of the near-eye display device.

[0008] An embodiment of the present application provides a near-eye display device, comprising a first display screen, a second display screen, and an optical assembly;

[0009] The optical assembly includes a polarization beam splitter, a reflector, a concave lens, a first wave plate and a light output mirror;

[0010] The light emitted by the first display screen passes through the polarization beam splitter to form a first output light, and the first output light is emitted through the light output mirror;

[0011] The light emitted by the second display screen passes through the polarization beam splitter, the concave lens and the first wave plate in sequence and is reflected by the reflector to form a first reflected light. The first reflected light passes through the first wave plate and the concave lens in sequence and is incident on the polarization beam splitter, and is reflected by the polarization beam splitter to form a second output light. The second output light is emitted through the light output mirror.

[0012] An electronic device comprises the near-eye display device as claimed in claim 1.

[0013] In an embodiment of the present application, light emitted from the second display screen is split into two polarized beams by a polarization beam splitter, with one beam transmitted and the other reflected. Therefore, the ideal brightness of the light emitted by the concave lens is half the brightness of the light emitted by the second display screen. The polarization state of the light emitted by the concave lens changes after passing through the first wave plate twice, thereby improving the reflection efficiency of the first reflected light, allowing more of the first reflected light to be reflected, thereby increasing the brightness of the second emitted light. Ideally, the polarized transmitted light emitted by the second display screen after passing through the polarization beam splitter is converted into reflected light after passing through the concave lens, the first wave plate, and the reflector. Therefore, the first reflected light is completely reflected by the polarization beam splitter. Therefore, the brightness of the second emitted light is half the brightness of the light emitted by the second display screen. The technical solution disclosed in this application can double the luminous efficiency of the second display screen. Therefore, when the luminous brightness of the first and second displays is the same, the brightness of the first emitted light from the first display screen and the second emitted light from the second display screen are similar. This effectively reduces the power consumption of the second display screen, thereby reducing the power consumption of the near-eye display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG1 is a schematic structural diagram of a first near-eye display device disclosed in an embodiment of the present application;

[0015] FIG2 is a schematic structural diagram of a second near-eye display device disclosed in an embodiment of the present application;

[0016] FIG3 is a schematic structural diagram of a third near-eye display device disclosed in an embodiment of the present application;

[0017] FIG4 is a schematic structural diagram of a fourth near-eye display device disclosed in an embodiment of the present application;

[0018] 5 to 7 are schematic diagrams of partial structures of a near-eye display device disclosed in an embodiment of the present application;

[0019] 8 to 10 are schematic diagrams of polarization directions of a partial structure of a near-eye display device disclosed in an embodiment of the present application.

[0020] Description of reference numerals: 100 - first display screen, 200 - second display screen, 310 - polarization beam splitter, 311 - first side, 312 - second side, 320 - Reflecting element, 330-first wave plate, 340-light output mirror, 350-first polarization conditioning element, 351-first linear polarizer, 352-second wave plate, 353-first anti-reflection unit, 360-second polarization conditioning element, 361-second linear polarizer, 362-third wave plate, 363-second anti-reflection unit, 370-concave lens, 411-first output light, 412-second output light, 421-first reflected light, 422-second reflected light, 423-third reflected light, 431-first polarized light, 432-second polarized light, 433-third polarized light, 434-fourth polarized light, 435-fifth polarized light, X-first direction, Y-second direction, A-first angle, B-second angle. DETAILED DESCRIPTION

[0021] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0022] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects and are not used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate so that the embodiments of this application can be implemented in an order other than that illustrated or described herein. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0023] In the related art, the near-eye display device includes two display screens and an optical mechanism, and the optical mechanism includes a dichroic prism, a reflector, a concave lens and a light-emitting mirror. Specifically, the light emitted by the first display screen passes through the dichroic prism and is emitted through the light-emitting mirror. The light emitted by the second display screen passes through the dichroic prism and is reflected by the reflector, and the reflected light is reflected twice by the dichroic prism and is emitted through the light-emitting mirror. In the related art, the display pixels of the near-eye display device are increased by setting a second display screen, and a concave lens is provided in the light-emitting direction of the second display screen. The concave lens can reduce the display area of ​​the second display screen. At this time, since the area of ​​the display area of ​​the second display screen is reduced, but the number of pixels remains unchanged, the pixel density of the near-eye display is increased, thereby further improving the resolution of the near-eye display device.

[0024] However, in this process, when the light emitted by the first display screen passes through the dichroic prism, the light will be lost after being split. Therefore, the ideal brightness of the first display screen observed at the light output mirror is half of the original brightness, that is, the brightness of the first display screen after being split is half of that before being split. Similarly, when the light emitted by the second display screen passes through the dichroic prism, the light loss is close to half, and after being reflected twice by the reflector and the dichroic prism, the light loss is half again. Therefore, the ideal brightness of the second display screen observed at the light output mirror is one quarter of the original brightness. Therefore, the brightness difference between the first display screen and the second display screen is close to double, so the second display screen needs to use a display screen with higher brightness, which is bound to increase the power consumption of the second display screen. Therefore, the power consumption of the near-eye display device in the related art is relatively large. In addition, the inconsistent selection of the two display screens will also cause the image fusion thickness of the near-eye display device to be inconsistent, resulting in poor display effect.

[0025] The near-eye display device and electronic device provided in the embodiments of the present application are described in detail below with reference to specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0026] Please refer to Figures 1 to 7. The embodiments of the present application disclose a near-eye display device, which includes a first display screen 100, a second display screen 200 and an optical component.

[0027] The first display screen 100 and the second display screen 200 are used to display video, pictures, text and other related display information. The optical component is used for light transmission between the first display screen 100 and the second display screen 200 in the near-eye display device. The optical component includes a polarization beam splitter 310, a reflector 320, a concave lens 370, a first wave plate 330 and a light output mirror 340. The light emitted by the first display screen 100 passes through the polarization beam splitter 310 to form a first output light 411, and the first output light 411 is emitted through the light output mirror 340. At this time, the light emitted by the first display screen 100 passes through the polarization beam splitter 310 to form polarized transmitted light and reflected light. The polarized transmitted light can pass through the polarization beam splitter 310, and the polarized reflected light is reflected by the polarization beam splitter 310. Therefore, the first output light 411 mentioned above is the polarized transmitted light. The polarization beam splitter 310 here can be a polarizing beam splitter prism (PBS), or it can be a polarization beam splitting structure of a grating or a thin film structure. The present application does not limit the specific structure of the polarization beam splitter 310 .

[0028] The light emitted from the second display screen 200 passes through the polarization beam splitter 310 to form first polarized light 431. The first polarized light 431 passes through the concave lens 370 and the first wave plate 330 in sequence, and is reflected by the reflector 320 to form first reflected light 421. The first reflected light 421 passes through the first wave plate 330 and the concave lens 370 in sequence, and is incident on the polarization beam splitter 310. After being reflected by the polarization beam splitter 310, it forms second output light 412. The second output light 412 is emitted through the light output mirror 340. At this time, the light emitted from the second display screen 200 passes through the polarization beam splitter 310 to form transmitted light and reflected light of different polarization states. The transmitted light of the polarization state can pass through the polarization beam splitter 310. As shown in Figure 1, the light emitted from the second display screen 200 passes through the polarization beam splitter 310 to form the first polarized light 431. Here, the first polarized light 431 is the transmitted light of the polarization state. As shown in FIG5 , the first polarized light 431 passes through the concave lens 370 and is incident on the first wave plate 330. When passing through the first wave plate 330, the first polarized light 431 generates a phase delay and becomes right-handed / left-handed circularly polarized light. The right-handed / left-handed circularly polarized light is reflected by the reflector 320 and becomes left-handed / right-handed circularly polarized light. After the left-handed / right-handed circularly polarized light enters the first wave plate 330 again, its polarization state changes due to the phase delay, and becomes polarized reflected light. The first reflected light 421 mentioned above undergoes two changes. Before entering the first wave plate 330, the first reflected light 421 is left-handed / right-handed circularly polarized light. After entering the first wave plate 330, it becomes polarized reflected light. At this time, the polarized reflected light enters the polarization beam splitter 310. The polarization beam splitter 310 can reflect the polarized reflected light. Therefore, the reflected polarized light serves as the second output light 412 mentioned above.

[0029] In the embodiment disclosed herein, light emitted from the second display screen 200 is split into two polarized beams by the polarization beam splitter 310, with one beam transmitted and the other reflected. Therefore, the ideal brightness of the light emitted by the concave lens 370 is half the brightness of the light emitted by the second display screen 200. After passing through the first wave plate 330 twice, the polarization state of the light emitted by the concave lens 370 changes. This improves the reflection efficiency of the first reflected light 421, allowing more of the first reflected light 421 to be reflected, thereby increasing the brightness of the second emitted light 412. Ideally, the polarized transmitted light formed by the light emitted by the second display screen 200 after passing through the polarization beam splitter 310 is completely converted into reflected light after passing through the concave lens 370, the first wave plate 330, and the reflector 320. Therefore, the first reflected light 421 is completely reflected by the polarization beam splitter 310. Therefore, the brightness of the second emitted light 412 is half the brightness of the light emitted by the second display screen 200.

[0030] Therefore, the technical solution disclosed in this application can double the light efficiency of the second display screen 200. Therefore, when the first display screen 100 and the second display screen 200 have the same luminance, the brightness of the first light 411 emitted by the first display screen 100 and the second light 412 emitted by the second display screen 200 are close. This effectively reduces the power consumption of the second display screen 200, thereby reducing the power consumption of the near-eye display device.

[0031] Furthermore, when the first display screen 100 and the second display screen 200 emit the same brightness, the brightness of the first light 411 emitted by the first display screen 100 and the second light 412 emitted by the second display screen 200 are close. Therefore, the first display screen 100 and the second display screen 200 can be selected to be the same as much as possible, thereby achieving a more consistent display effect of the image fusion thickness of the near-eye display device, thereby further improving the display quality of the near-eye display device.

[0032] In one embodiment, the vibration direction of the transmitted light can be perpendicular to the vibration direction of the reflected light. Assume that the polarization beam splitter 310 transmits linearly polarized light in the P direction (parallel direction) and reflects linearly polarized light in the S direction (vertical direction). The P-direction linear polarization and S-direction linear polarization here refer to the phenomenon that when the light passes through the polarization beam splitter 310 at a non-vertical angle, the reflection and transmission characteristics are dependent on the polarization phenomenon. In this case, the coordinate system used is defined by the plane containing the input and reflected light beams. If the polarization vector of the light is within the plane, it is linearly polarized light in the P direction; if the polarization vector is perpendicular to the plane, it is linearly polarized light in the S direction.

[0033] Specifically, after the light emitted from the first display screen 100 is split by the polarization beam splitter 310 , the P-direction linear polarization light is transmitted and the S-direction linear polarization light is reflected. Therefore, the first output light 411 can be P-direction linear polarization light.

[0034] Of course, the polarization beam splitter 310 can also transmit S-polarized light and reflect P-polarized light. In this case, the first output light 411 is S-polarized light. Regardless of the transmission direction of the polarization beam splitter 310, it is split into two polarized lights with perpendicular vibration directions, with one beam transmitted and the other reflected. Therefore, the ideal brightness of the first output light 411 is half the brightness of the light emitted by the first display screen 100. The ideal brightness here is a theoretical value, and the actual brightness may be lower than the ideal brightness.

[0035] As can be seen from the above, the vibration direction of the transmitted light is perpendicular to the vibration direction of the reflected light. That is, when the polarization direction of the first reflected light 421 is perpendicular to the vibration direction of the transmitted light, the reflection efficiency can be further improved, thereby increasing the brightness of the second output light 412. Therefore, in order to further improve the brightness of the second output light 412, it is necessary to improve the reflection efficiency of the first reflected light 421. Therefore, when the polarization direction of the second output light 412 is perpendicular to the polarization direction of the first polarized light 431, that is, the polarization direction of the first reflected light 421 is perpendicular to the polarization direction of the first polarized light 431, the first reflected light 421 will be totally reflected by the polarization beam splitter 310, thereby improving the reflection efficiency of the light and making the brightness of the second output light 412 closer to the ideal brightness.

[0036] Assume that the polarization beam splitter 310 transmits linearly polarized light in the P direction (parallel direction) and reflects linearly polarized light in the S direction (vertical direction). The light emitted by the second display screen 200 is split by the polarization beam splitter 310 into two beams of linearly polarized light with perpendicular vibration directions. As shown in Figure 5, the light emitted by the second display screen 200 passes through the polarization beam splitter 310 to form a first polarized light 431. Here, the first polarized light 431 can be linearly polarized light in the P direction. The first polarized light 431 passes through the concave lens 370 and is incident on the first wave plate 330. When the first polarized light 431 passes through the first wave plate 330, a phase delay occurs and the light becomes right-handed circularly polarized light. The right-handed circularly polarized light is reflected by the reflector 320 and becomes left-handed circularly polarized light. The left-handed circularly polarized light is then incident on the first wave plate 330 again and becomes linearly polarized light in the S direction due to the phase delay. The first reflected light 421 mentioned above undergoes two changes. Before entering the first wave plate 330, the first reflected light 421 is left-handed circularly polarized light. After entering the first wave plate 330, it becomes S-direction linear polarized light. At this time, the S-direction linear polarized light is incident on the polarization beam splitter 310. The polarization beam splitter 310 can reflect the S-direction linear polarized light. Therefore, the reflected S-direction linear polarized light serves as the above-mentioned second output light 412.

[0037] Of course, the polarization beam splitter 310 can also transmit S-polarized light and reflect P-polarized light. The specific process is as shown in Figure 5. The first polarized light 431 can be S-polarized light. After passing through the concave lens 370, the first polarized light 431 is incident on the first wave plate 330. After passing through the first wave plate 330, it produces phase delay and becomes left-handed circularly polarized light. The left-handed circularly polarized light is reflected by the reflector 320 and becomes right-handed circularly polarized light. After the right-handed circularly polarized light is incident on the first wave plate 330 again, it becomes P-polarized light due to phase delay. In other words, the first reflected light 421 mentioned above undergoes two changes. Before entering the first wave plate 330, the first reflected light 421 is right-handed circularly polarized light. After entering the first wave plate 330, it becomes P-polarized light. The P-polarized light is incident on the polarization beam splitter 310. The polarization beam splitter 310 can reflect the P-polarized light. Therefore, the reflected P-polarized light serves as the second output light 412 mentioned above.

[0038] In the above embodiment, the light-emitting surface of the first display screen 100 can be oriented in the first direction X, and the light-emitting surface of the second display screen 200 can be oriented in the second direction Y. The first direction X can be parallel to the second direction Y. In this case, the light-emitting surfaces of the first display screen 100 and the second display screen 200 correspond to different areas of the polarization beam splitter 310. Therefore, the polarization beam splitter 310 needs to be larger, thereby making the near-eye display larger.

[0039] Based on this, in another optional solution, the first direction X may intersect with the second direction Y. The first display screen 100, the polarization beam splitter 310, and the light output mirror 340 may be spaced apart along the first direction X. The second display screen 200, the polarization beam splitter 310, the concave lens 370, the first wave plate 330, and the reflector 320 may be spaced apart along the second direction Y. The polarization beam splitter 310 may have a first side 311 and a second side 312 disposed opposite each other; the first display screen 100 and the second display screen 200 may both be located on the first side 311, and the concave lens 370 and the light output mirror 340 may both be located on the second side 312.

[0040] In this solution, the light-emitting surface of the first display screen 100 and the light-emitting surface of the second display screen 200 intersect, so the area of ​​the first display screen 100 opposite to the polarization beam splitter 310 and the area of ​​the light-emitting surface of the second display screen 200 opposite to the polarization beam splitter 310 at least partially overlap, so they can be shared, thereby reducing the volume of the polarization beam splitter 310 and thus reducing the volume of the near-eye display device.

[0041] In addition, the first display screen 100, the second display screen 200, the polarization beam splitter 310, the concave lens 370, the first wave plate 330, the reflector 320 and the light output mirror 340 are distributed along the circumference of the polarization beam splitter 310, thereby making the structure of the near-eye display device more compact, thereby further reducing the volume of the near-eye display device.

[0042] Specifically, light emitted from the first display screen 100 enters the polarization beam splitter 310 from the first side 311. The polarization beam splitter 310 splits the light emitted from the first display screen 100 into transmitted light and reflected light. The transmitted light is emitted from the second side 312, while the reflected light is reflected and thus emitted from the first side 311. The light emitted from the second side 312 is the first output light 411 mentioned above. Light emitted from the second display screen 200 enters the polarization beam splitter 310 from the first side 311. The polarization beam splitter 310 splits the light emitted from the second display screen 200 into transmitted light and reflected light. The transmitted light is emitted from the second side 312, while the reflected light is reflected and thus emitted from the first side 311. The light emitted from the second side 312 is the first polarized light 431 mentioned above. After the first polarized light 431 is converted into a polarization state by the first wave plate 330 , it enters the polarization beam splitter 310 from the second side 312 . The light is converted from a polarized transmitted light into a polarized reflected light. The polarized reflected light is reflected by the polarization beam splitter 310 , thereby forming a second output light 412 .

[0043] In another optional embodiment, the first direction X may be perpendicular to the second direction Y. This solution can make the structure of the near-eye display more compact, thereby further reducing the volume of the near-eye display.

[0044] In order to make the emitted light closer to the ideal state. In another optional embodiment, the angle between the light-emitting surface of the first display screen 100 and the plane where the polarization beam splitter 310 is located is a first angle A, and the first angle A can be 45°. In this solution, the light emitted by the first display screen 100 is incident on the polarization beam splitter 310 along a 45° direction. Since the polarization beam splitter 310 can split the non-polarized light incident at 45° into two beams of perpendicular linearly polarized light, the transmittance of the polarized state of the transmitted light can be improved, thereby making the emitted light closer to the ideal state, thereby further improving the display effect of the near-eye display device.

[0045] Similarly, the angle between the light emitting surface of the second display screen 200 and the plane where the polarization beam splitter 310 is located can be a second angle B, and the second angle B can be 45°. This solution has the same effect as the above solution, so it is not described in detail herein.

[0046] In the above embodiment, the first angle A and the second angle B can both be 45°, so the first display screen 100, the second display screen 200, and the polarization beam splitter 310 can form a right isosceles triangle structure. Therefore, the display surface of the first display screen 100 is perpendicular to the display surface of the second display screen 200.

[0047] As shown in FIG1 , the first side 311 of the polarization beam splitter 310 has an incident surface. The aforementioned first angle A can be the angle between the light-emitting surface of the first display screen 100 and the incident surface. The second angle B can be the angle between the light-emitting surface of the second display screen 200 and the incident surface. As shown in FIG1 , the polarization beam splitter 310 has a flat plate structure. In this case, the surface of the first side 311 and the surface of the second side 312 of the polarization beam splitter 310 are parallel. Of course, the polarization beam splitter 310 can also have a prismatic structure, and the aforementioned incident surface can be a surface of the prismatic structure. The specific shape of the polarization beam splitter 310 is not limited herein.

[0048] The optical path difference of the first wave plate 330 disclosed in this application satisfies the formula: D=|n o -n e |d,n o is the refractive index of o light, n e is the refractive index of the e-light, and d is the thickness of the first wave plate 330. When linearly polarized light is perpendicularly incident on the first wave plate 330, it is decomposed into the o-light and e-light at different propagation velocities. Because the o-light and e-light have different velocities in the first wave plate 330, a certain phase difference occurs between the o-light and the e-light after passing through the first wave plate 330. Therefore, the phase delay between the o-light and the e-light can be calculated based on the optical path difference between the o-light and the e-light. Therefore, by adjusting the thickness of the first wave plate 330, the intensity of the first reflected light 421 can be increased, thereby further improving the second output light 412 to approach the ideal optical effect.

[0049] In another optional embodiment, the optical path difference of the first wave plate 330 satisfies the formula: |n o -n e |d=(m / 2+0.25)λ; where m is an integer and λ is the wavelength. According to the above formula, first wave plate 330 can be a quarter-wave plate. When the light vector of incident linearly polarized light forms a 45° angle with the fast axis or slow axis of first wave plate 330, circularly polarized light is obtained after passing through the quarter-wave plate. Alternatively, a quarter-wave plate can convert circularly polarized light or elliptically polarized light into linearly polarized light.

[0050] This solution can further improve the brightness of the second emitted light 412 , thereby making the second emitted light 412 closer to the ideal light effect.

[0051] Of course, the first wave plate 330 disclosed in this application is not limited to the quarter-wave plate described above, and can also be a three-quarter wave plate; or the first wave plate 330 includes a quarter-wave plate and a half-wave plate stacked together. Of course, the first wave plate 330 can also have other structures, which are not limited herein.

[0052] In another optional embodiment, the angle between the slow axis of the first wave plate 330 and the transmission axis of the polarization beam splitter 310 can be greater than or equal to 42.5° and less than or equal to 47.5°; or, the angle between the slow axis of the first wave plate 330 and the transmission axis of the polarization beam splitter 310 can be greater than or equal to 132.5° and less than or equal to 137.5°. The slow axis direction of the first wave plate 330 is the direction shown by C1 in FIG8 , and the transmission axis of the polarization beam splitter 310 is the direction shown by C2 in FIG8 . Here, the slow axis of the first wave plate 330 and the transmission axis of the polarization beam splitter 310 can form a first axis angle and a second axis angle that are complementary to each other, the first axis angle being the angle shown by D1 in FIG8 , and the second axis angle being the angle shown by D2 in FIG8 . The first axis angle can be greater than or equal to 42.5° and less than or equal to 47.5°, and the second axis angle can be greater than or equal to 132.5° and less than or equal to 137.5. In this solution, within the above-mentioned angle range, the conversion rate of the polarization state can be improved, thereby further improving the light efficiency of the second emergent light 412 , thereby making the second emergent light 412 closer to the light efficiency of the ideal state.

[0053] Furthermore, the first axis angle can be 45° and the second axis angle can be 135°. In this case, when the light vector of the incident linearly polarized light forms an angle of 45° with the slow axis of the first wave plate 330, the polarization state conversion rate can be further improved, thereby further improving the light efficiency of the second output light 412.

[0054] In the above solution, when light emitted from the second display 200 and the first display 100 is split by the polarization beam splitter 310, it produces reflected light with different polarization states. This reflected light is reflected to the light-emitting surface of the second display 200, thereby affecting the original optical path of the second display 200 and easily causing ghosting on the near-eye display device. Ghosting can cause the displayed image to be blurred, thereby affecting the display performance of the near-eye display device.

[0055] Based on this, in another optional embodiment, as shown in FIG2 , a first polarization conditioning member 350 may be provided on the light-emitting side of the second display screen 200. The first polarization conditioning member 350 may include a first linear polarizer 351. Light emitted from the second display screen 200 may form second polarized light 432 after passing through the first linear polarizer 351. The second polarized light 432 may sequentially pass through the polarization beam splitter 310, the concave lens 370, and the first wave plate 330, and then be reflected by the reflector 320 to form the aforementioned first reflected light 421.

[0056] During the specific optical path transmission process, the light emitted by the second display screen 200 passes through the first linear polarizer 351 to form the second polarized light 432. Here, the second polarized light 432 is the polarized transmitted light formed by the first linear polarizer 351. The polarized transmitted light can pass through the polarization beam splitter 310. Therefore, when the first polarized light 431 enters the polarization beam splitter 310, the polarization reflected light has been greatly reduced, which can effectively reduce the impact of the incident polarization reflected light on the display image, thereby effectively reducing the generation of ghost images.

[0057] Furthermore, because the polarization directions of the reflected light and the transmitted light are perpendicular, even if the reflected light is incident on the first linear polarizer 351, it can still partially cut off the reflected light. Cutting off means that the reflected light cannot pass through the first linear polarizer 351, thereby reducing the amount of reflected light incident on the light-emitting surface of the second display screen 200.

[0058] Therefore, the first linear polarizer 351 can not only reduce the reflection of the light before entering the polarization beam splitter 310, but also cut off the polarization state reflection, thereby reducing the polarization state reflection of the reflected light at the light output surface of the second display screen 200, thereby more effectively eliminating the display ghost, thereby further improving the display effect.

[0059] The polarized reflected light received by the first linear polarizer 351 may include the polarized reflected light of the light emitted from the first display screen 100 and the polarized reflected light of the light emitted from the second display screen 200 by the polarization beam splitter 310 .

[0060] Furthermore, the transmission axis of the first linear polarizer 351 can be parallel to the transmission axis of the polarization beam splitter 310. In this case, the first linear polarizer 351 and the polarization beam splitter 310 simultaneously transmit either P-direction linearly polarized light or S-direction linearly polarized light. In this solution, the transmission axis of the first linear polarizer 351 is parallel to the transmission axis of the polarization beam splitter 310. The polarization directions of the first polarized light 431 and the second polarized light 432 are the same. Therefore, the second polarized light 432 and the first polarized light 431 are essentially the same polarization. This minimizes polarization loss, thereby further improving the optical efficiency of the second output light 412.

[0061] In addition, the transmission axis of the first linear polarizer 351 is parallel to the transmission axis of the polarization beam splitter 310, which further indicates that the reflection axis of the first linear polarizer 351 is also parallel to the reflection axis of the polarization beam splitter 310. Therefore, the first linear polarizer 351 has a better cutoff effect on the reflected light of the polarization state produced by the polarization beam splitter 310, thereby further reducing the generation of ghost images.

[0062] In the above embodiment, the ghost images generated by the display screen of the second display screen 200 are not only caused by the reflected light in the polarization state, but also by the external ambient light incident on the light-emitting surface, which is reflected to form ghost images. The external ambient light here refers to the light incident on the near-eye display device by the light-emitting mirror 340. Or the light emitted by the first display screen 100 and the second display screen 200 is reflected to the light-emitting surface through other interfaces, which is also reflected to form ghost images. The other reflection sections here can be the reflection of the device inside the near-eye display device, and the reflected light is not polarized. Alternatively, the large-angle emission light of the first display screen 100 and the second display screen 200 will also be partially reflected to the light-emitting surface through the polarization beam splitter 310, which is reflected to form ghost images. The large-angle reflection here is also not polarized. The reflected light generated by the above three light sources on the light-emitting surface can directly pass through the first linear polarizer 351, thereby generating ghost images.

[0063] Based on this, in another optional embodiment, the first polarization conditioning member 350 may further include a second wave plate 352. Light may sequentially pass through the first linear polarizer 351 and the second wave plate 352, and then be reflected by the second display screen 200 to form second reflected light 422. The second reflected light 422 may then pass through the second wave plate 352 to form third polarized light 433. The polarization direction of the third polarized light 433 may be perpendicular to the polarization direction of the first linear polarizer 351. Here, the polarization direction of the first linear polarizer 351 is the direction of the transmission axis of the first linear polarizer 351. In other words, the third polarized light 433 cannot transmit through the first linear polarizer 351.

[0064] In the specific optical transmission process, as shown in Figure 6, assuming that the transmission axis of the first linear polarizer 351 is in the P direction, the unpolarized light becomes linearly polarized in the P direction after passing through the first linear polarizer 351. It then passes through the second wave plate 352, causing phase delay and becoming right-handed circularly polarized light. After being reflected at the light-exiting surface and changing its propagation direction, it becomes left-handed circularly polarized light. Finally, after entering the second wave plate 352 again, it becomes linearly polarized in the S direction due to phase delay. At this point, the third polarized light 433 is linearly polarized in the S direction, while the transmission axis of the first linear polarizer 351 is in the P direction. Therefore, the third polarized light 433 cannot pass through the first linear polarizer 351, thereby blocking the unpolarized light incident on the light-exiting surface, thereby preventing the light from transmitting within the optical path and further reducing display ghosting.

[0065] The transmission axis of the first linear polarizer 351 can also be in the S direction. After passing through the first linear polarizer 351, unpolarized light becomes linearly polarized in the S direction. It then passes through the second wave plate 352, causing phase retardation and becoming left-handed circularly polarized light. After reflecting off the light-emitting surface and changing its propagation direction, it becomes right-handed circularly polarized light. Finally, after entering the second wave plate 352 again, it becomes linearly polarized in the P direction due to phase retardation.

[0066] In addition, the light emitted by the second display screen 200 is unpolarized light, which can also be understood as natural light. Therefore, when the light emitted by the second display screen 200 passes through the second wave plate 352, the second wave plate 352 does not change its polarization characteristics. After passing through the first linear polarizer 351 from the second wave plate 352, it becomes linearly polarized light in the P direction and then enters the polarization beam splitter 310. Therefore, the second wave plate 352 in this application does not affect the transmission of light from the second display screen 200.

[0067] The optical path difference of the second wave plate 352 disclosed in this application satisfies the formula: D=|n o -n e |d2,n o is the refractive index of o light, n e is the refractive index of the e-light, and d2 is the thickness of the second wave plate 352. When linearly polarized light is perpendicularly incident on the second wave plate 352, it is decomposed into the o-light and e-light, each with different propagation velocities. Because the o-light and e-light have different velocities in the second wave plate 352, a certain phase difference occurs between the o-light and the e-light after passing through the second wave plate 352. Therefore, the phase delay between the o-light and the e-light can be calculated based on the optical path difference between the o-light and the e-light. Therefore, by adjusting the thickness of the second wave plate 352, the anti-reflection effect of the first polarization conditioning element 350 can be enhanced, further reducing display ghosting.

[0068] In another optional embodiment, the optical path difference of the second wave plate 352 satisfies the formula: |n o -n e |d2=(m+0.25)λ; where m is an integer and λ is the wavelength. According to the above formula, second wave plate 352 can be a quarter-wave plate. When the light vector of incident linearly polarized light forms a 45° angle with the fast axis or slow axis of second wave plate 352, circularly polarized light is obtained after passing through the quarter-wave plate. Alternatively, a quarter-wave plate can convert circularly polarized light or elliptically polarized light into linearly polarized light.

[0069] This solution can further improve the anti-reflection performance of the first polarization modulation element 350 , thereby further reducing the display ghosting of the near-eye display device.

[0070] Of course, the second wave plate 352 disclosed in this application is not limited to the quarter-wave plate described above, and can also be a three-quarter wave plate; or the second wave plate 352 includes a quarter-wave plate and a half-wave plate stacked together. Of course, the second wave plate 352 can also have other structures, which are not limited herein.

[0071] In another optional embodiment, the angle between the slow axis of the second wave plate 352 and the transmission axis of the first linear polarizer 351 is greater than or equal to 42.5° and less than or equal to 47.5°. Alternatively, the angle between the slow axis of the second wave plate 352 and the transmission axis of the first linear polarizer 351 is greater than or equal to 132.5° and less than or equal to 137.5°. The slow axis of the second wave plate 352 is oriented as shown by C4 in FIG. 9 , and the transmission axis of the first linear polarizer 351 is oriented as shown by C3 in FIG. 9 .

[0072] Here, the slow axis of the second wave plate 352 and the transmission axis of the first linear polarizer 351 can form a third and fourth axis angles that are complementary to each other. The third axis angle is the angle shown as D4 in Figure 9, and the fourth axis angle is the angle shown as D4 in Figure 9. The third axis angle can be greater than or equal to 42.5° and less than or equal to 47.5°, and the fourth axis angle can be greater than or equal to 132.5° and less than or equal to 137.5. In this solution, within the above-mentioned angle range, the anti-reflection performance of the second display screen 200 can be improved, thereby further reducing the display ghosting in the optical path of the second display screen 200, thereby further improving the display effect of the near-eye display device.

[0073] Furthermore, the third axis angle can be 45°, and the fourth axis angle can be 135°. In this case, when the light vector of the incident linearly polarized light forms a 45° angle with the slow axis of the second wave plate 352, the absorption effect of the second reflected light 422 can be further improved, and the display ghost in the optical path of the second display screen 200 can be further reduced, thereby further optimizing the display effect of the near-eye display device.

[0074] In the embodiments disclosed herein, light reflected from the interface between the first linear polarizer 351 and the air can also produce ghost images. To reduce the light reflected from the interface between the first linear polarizer 351 and the air, in another optional embodiment, the optical assembly may further include a first anti-reflection portion 353. The first anti-reflection portion 353 may be disposed on the side of the first linear polarizer 351 facing away from the second display screen 200. In this solution, the anti-reflection portion is added to the second display screen 200 near the air interface, thereby effectively reducing light reflected from the interface between the first linear polarizer 351 and the air, thereby effectively reducing ghost images produced by light reflected from the air interface, thereby further improving the display quality of the near-eye display device.

[0075] Optionally, the first anti-reflection portion 353 may be an anti-reflection film or an anti-reflection coating, or may be other anti-reflection structures, which is not limited herein.

[0076] The above solution can reduce the ghost images in the light path formed by the second display screen 200 . In addition, ghost images are also formed in the light path formed by the first display screen 100 , so the ghost images in the light path of the first display screen 100 also need to be reduced.

[0077] Based on this, in another optional embodiment, as shown in FIG2 , a second polarization conditioning member 360 may be provided on the light-emitting side of the first display screen 100. The second polarization conditioning member 360 may include a second linear polarizer 361. Light emitted from the first display screen 100 passes through the second linear polarizer 361 to form fourth polarized light 434. The fourth polarized light 434 then passes through the polarization beam splitter 310 to form first output light 411.

[0078] During the specific optical path transmission process, the light emitted from the first display screen 100 passes through the second linear polarizer 361 to form fourth polarized light 434. The fourth polarized light 434 here is the polarized transmitted light formed by the second linear polarizer 361. The polarized transmitted light can pass through the polarization beam splitter 310. Therefore, when the fourth polarized light 434 enters the polarization beam splitter 310, the polarization reflected light has been greatly reduced, which can effectively reduce the impact of the incident polarization reflected light on the display image, thereby effectively reducing the ghost image generated in the optical path of the first display screen 100.

[0079] Furthermore, because the polarization directions of the reflected light and the transmitted light are perpendicular, even if the reflected light is incident on the second linear polarizer 361, it can still partially cut off the reflected light. Cutting off means that the reflected light cannot pass through the second linear polarizer 361, thereby reducing the amount of reflected light incident on the light-emitting surface of the first display screen 100.

[0080] Therefore, the second linear polarizer 361 can not only reduce the reflection of the light before entering the polarization beam splitter 310, but also cut off the polarization state reflection, thereby reducing the reflection of the polarization state reflected light at the light output surface of the first display screen 100, thereby more effectively eliminating display ghosts, thereby further improving the display effect.

[0081] The polarized reflected light received by the second linear polarizer 361 may include the polarized reflected light of the light emitted from the first display screen 100 and the polarized reflected light of the light emitted from the second display screen 200 by the polarization beam splitter 310 .

[0082] Furthermore, the transmission axis of the second linear polarizer 361 can be parallel to the transmission axis of the polarization beam splitter 310. In this case, the second linear polarizer 361 and the polarization beam splitter 310 can simultaneously transmit either P-direction linearly polarized light or S-direction linearly polarized light. In this solution, the transmission axis of the second linear polarizer 361 is parallel to the transmission axis of the polarization beam splitter 310, and the polarization direction of the fourth polarized light 434 is the same as the polarization direction of the first output light 411. Therefore, the fourth polarized light 434 and the first output light 411 are essentially the same polarization light. This minimizes the loss of polarized light, thereby further improving the optical efficiency of the first output light 411.

[0083] In addition, the transmission axis of the second linear polarizer 361 is parallel to the transmission axis of the polarization beam splitter 310, which further indicates that the reflection axis of the second linear polarizer 361 is also parallel to the reflection axis of the polarization beam splitter 310. Therefore, the second linear polarizer 361 has a better cutoff effect on the reflected light of the polarization state produced by the polarization beam splitter 310, thereby further reducing the generation of ghost images.

[0084] In the above-mentioned embodiment, the ghost images produced by the display screen of the first display screen 100 are not only caused by the reflected light of the polarized state, but also by the external ambient light incident on the light-emitting surface, which is reflected to form ghost images. The external ambient light here refers to the light incident on the near-eye display device by the light-emitting mirror 340. Or the light emitted by the first display screen 100 and the second display screen 200 is reflected to the light-emitting surface through other interfaces, and the reflection forms ghost images. Or the large-angle emitted light of the first display screen 100 and the second display screen 200 is also reflected to the light-emitting surface through the polarization beam splitter 310, and the reflection forms ghost images. The large-angle reflection here is also not polarized. The reflected light generated by the above-mentioned three kinds of light on the light-emitting surface can directly pass through the second linear polarizer 361, thereby producing ghost images.

[0085] Based on this, in another optional embodiment, the second polarization conditioning element 360 may further include a third wave plate 362. After the light passes through the second linear polarizer 361 and the third wave plate 362 in sequence, it is reflected by the first display screen 100 to form a third reflected light 423. The third reflected light 423 passes through the third wave plate 362 to form a fifth polarized light 435. The polarization direction of the fifth polarized light 435 can be perpendicular to the polarization direction of the second linear polarizer 361. That is, the fifth polarized light 435 cannot pass through the second linear polarizer 361.

[0086] In the specific optical path transmission process, as shown in FIG7 , assuming that the transmission axis of the second linear polarizer 361 is in the P direction, the unpolarized light becomes linearly polarized light in the P direction after passing through the first linear polarizer 351. It then passes through the third wave plate 362, causing phase delay and becoming right-handed circularly polarized light. After being reflected from the light-emitting surface and changing its propagation direction, it becomes left-handed circularly polarized light. Finally, after entering the third wave plate 362 again, it becomes linearly polarized light in the S direction due to phase delay. At this point, the fifth polarized light 435 is linearly polarized light in the S direction, while the transmission axis of the second linear polarizer 361 is in the P direction. Therefore, the fifth polarized light 435 cannot pass through the second linear polarizer 361, thereby blocking the unpolarized light incident on the light-emitting surface, thereby preventing the light from transmitting within the optical path and further reducing display ghosting in the optical path of the first display screen 100.

[0087] The transmission axis of the second linear polarizer 361 can also be in the S direction. After passing through the second linear polarizer 361, unpolarized light becomes linearly polarized in the S direction. It then passes through the third wave plate 362, causing phase retardation and becoming left-handed circularly polarized light. After reflecting off the light-emitting surface and changing its propagation direction, it becomes right-handed circularly polarized light. Finally, after entering the third wave plate 362 again, it becomes linearly polarized in the P direction due to phase retardation.

[0088] In addition, the light emitted by the first display screen 100 is unpolarized light, which can also be understood as natural light. Therefore, when the light emitted by the first display screen 100 passes through the third wave plate 362, the third wave plate 362 does not change its polarization characteristics. After passing through the second linear polarizer 361 from the third wave plate 362, it becomes linearly polarized light in the P direction and then enters the polarization beam splitter 310. Therefore, the third wave plate 362 in this application does not affect the light transmission of the first display screen 100.

[0089] The optical path difference of the third wave plate 362 disclosed in this application satisfies the formula: D=|n o -n e |d3,n o is the refractive index of o light, n e is the refractive index of the e-light, and d3 is the thickness of the third wave plate 362. When linearly polarized light is perpendicularly incident on the third wave plate 362, it is decomposed into the o-light and e-light, each with different propagation velocities. Because the o-light and e-light travel at different speeds in the third wave plate 362, a certain phase difference occurs between the o-light and e-light after passing through the third wave plate 362. Therefore, the phase delay between the o-light and e-light can be calculated based on the optical path difference. Therefore, by adjusting the thickness of the third wave plate 362, the anti-reflection effect of the second polarization conditioning element 360 can be enhanced, further reducing display ghosting.

[0090] In another optional embodiment, the optical path difference of the third wave plate 362 satisfies the formula: |n o -n e|d3=(m+0.25)λ; where m is an integer and λ is the wavelength. According to the above formula, third wave plate 362 can be a quarter-wave plate. When the light vector of incident linearly polarized light forms a 45° angle with the fast axis or slow axis of third wave plate 362, circularly polarized light is obtained after passing through the quarter-wave plate. Alternatively, a quarter-wave plate can convert circularly polarized light or elliptically polarized light into linearly polarized light.

[0091] This solution can further improve the anti-reflection performance of the first polarization modulation element, thereby further reducing the display ghost of the near-eye display device.

[0092] Of course, the third wave plate 362 disclosed in this application is not limited to the quarter-wave plate described above, but can also be a three-quarter wave plate; or the third wave plate 362 includes a quarter-wave plate and a half-wave plate stacked together. Of course, the third wave plate 362 can also have other structures, which are not limited herein.

[0093] In another optional embodiment, the angle between the slow axis of the third wave plate 362 and the transmission axis of the second linear polarizer 361 is greater than or equal to 42.5° and less than or equal to 47.5°. Alternatively, the angle between the slow axis of the third wave plate 362 and the transmission axis of the second linear polarizer 361 is greater than or equal to 132.5° and less than or equal to 137.5°. The slow axis of the third wave plate 362 is oriented as shown by C5 in FIG10 , and the transmission axis of the second linear polarizer 361 is oriented as shown by C6 in FIG10 .

[0094] The slow axis of the third wave plate 362 and the transmission axis of the second linear polarizer 361 can form a fifth and sixth axis angles that are complementary to each other. The fifth axis angle is shown as D5 in Figure 10, and the sixth axis angle is shown as D6 in Figure 10. The fifth axis angle can be greater than or equal to 42.5° and less than or equal to 47.5°, and the sixth axis angle can be greater than or equal to 132.5° and less than or equal to 137.5. In this solution, within the above-mentioned angle range, the anti-reflection performance of the first display screen 100 can be improved, thereby further reducing the display ghosting in the optical path of the first display screen 100, thereby further improving the display effect of the near-eye display device.

[0095] Furthermore, the fifth axis angle can be 45°, and the sixth axis angle can be 135°. In this case, when the light vector of the incident linearly polarized light forms a 45° angle with the slow axis of the third wave plate 362, the absorption effect of the third reflected light 423 can be further improved, and the display ghost in the optical path of the first display screen 100 can be further reduced, thereby further optimizing the display effect of the near-eye display device.

[0096] In the embodiments disclosed herein, light reflected from the interface between the second linear polarizer 361 and the air can also produce ghost images. To reduce the light reflected from the interface between the second linear polarizer 361 and the air, in another optional embodiment, the optical assembly can further include a second anti-reflection portion 363, which can be disposed on the side of the second linear polarizer 361 facing away from the first display screen 100. In this solution, the anti-reflection portion is added to the first display screen 100 at a position close to the air interface, thereby effectively reducing the light reflected from the interface between the second linear polarizer 361 and the air, thereby effectively reducing the ghost images produced by the light reflected from the air interface, thereby further improving the display effect of the near-eye display device.

[0097] Optionally, the second anti-reflection portion 363 may be an anti-reflection film or an anti-reflection coating, or may be other anti-reflection structures, which is not limited herein.

[0098] In the above embodiment, the first display screen 100 and the second display screen 200 can both be OLEDs (Organic Light-Emitting Diodes). OLEDs are self-luminous displays. When an OLED screen does not have a circular polarizer, the light emitted by the OLED is unpolarized light.

[0099] In another optional embodiment, both the first display screen 100 and the second display screen 200 may be LCDs (Liquid Crystal Displays), which are non-self-luminous displays. As can be seen from the structure of LCDs, LCDs have inherent linear polarizers. Therefore, when the first display screen 100 and the second display screen 200 are LCDs, the light they emit is polarized. Therefore, compared to a solution where both the first display screen 100 and the second display screen 200 are OLEDs, the use of LCDs can further improve the light utilization of the first display screen 100 and the second display screen 200, thereby further increasing the brightness of the first and second emitted light 411 and 412.

[0100] For example, both the first display screen 100 and the second display screen 200 can be LCDs, and the transmission axis of the linear polarizer of the LCD itself is parallel to the transmission axis of the polarization beam splitter 310. In this case, all the light emitted by the first display screen 100 and the second display screen 200 can pass through the polarization beam splitter 310. Therefore, compared with the solution using OLED, the brightness of the first output light 411 formed by the first display screen 100 is doubled, and the brightness of the second output light 412 formed by the second display screen 200 is also doubled. In addition, compared with the solution in the related art, the brightness of the first output light 411 formed by the first display screen 100 is doubled, and the brightness of the second output light 412 formed by the second display screen 200 is doubled. Therefore, the solution in which the first display screen 100 and the second display screen 200 are both LCDs can further improve the display performance of the near-eye device.

[0101] Based on the near-eye display device disclosed in the embodiments of the present application, the embodiments of the present application further disclose an electronic device, and the disclosed electronic device includes the near-eye display device described in any of the above embodiments.

[0102] The electronic device disclosed in the embodiments of the present application may be a VR device, such as VR glasses, a VR helmet, etc. Alternatively, it may be an AR device, such as AR glasses, an AR helmet, etc. The embodiments of the present application do not limit the specific type of electronic device.

[0103] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A near-eye display device, comprising a first display screen (100), a second display screen (200) and an optical component; The optical component comprises a polarization beam splitter (310), a reflector (320), a concave lens (370), a first wave plate (330) and a light output mirror (340); The light emitted by the first display screen (100) passes through the polarization beam splitter (310) to form first output light (411), and the first output light (411) is emitted through the light output mirror (340); The light emitted by the second display screen (200) passes through the polarization beam splitter (310), the concave lens (370) and the first wave plate (330) in sequence, and is then reflected by the reflector (320) to form a first reflected light (421); the first reflected light (421) passes through the first wave plate (330) and the concave lens (370) in sequence, is incident on the polarization beam splitter (310), and is reflected by the polarization beam splitter (310) to form a second output light (412); the second output light (412) is emitted through the light output mirror (340).

2. The near-eye display device according to claim 1, wherein: The light emitted by the second display screen (200) passes through the polarization beam splitter (310) to form a first polarized light (431); the first polarized light (431) passes through the concave lens (370) and the first wave plate (330) in sequence and is reflected by the reflector (320) to form the first reflected light (421); and the polarization direction of the second output light (412) is perpendicular to the polarization direction of the first polarized light (431).

3. The near-eye display device according to claim 1 or 2, wherein: A first polarization conditioning component (350) is provided on the light-emitting side of the second display screen (200), the first polarization conditioning component (350) comprising a first linear polarizer (351), the light emitted by the second display screen (200) passes through the first linear polarizer (351) to form second polarized light (432), the second polarized light (432) passes through the polarization beam splitter (310), the concave lens (370) and the first wave plate (330) in sequence, and is reflected by the reflector (320) to form the first reflected light (421).

4. The near-eye display device according to claim 3, wherein: The direction of the transmission axis of the first linear polarizer (351) is parallel to the direction of the transmission axis of the polarization beam splitter (310).

5. The near-eye display device according to claim 3 or 4, wherein: The first polarization tempering element (350) further comprises a second wave plate (352); light passes through the first linear polarizing plate (351) and the second wave plate (352) in sequence and is reflected by the second display screen (200) to form second reflected light (422); the second reflected light (422) passes through the second wave plate (352) to form third polarized light (433); and the polarization direction of the third polarized light (433) is perpendicular to the polarization direction of the first linear polarizing plate (351).

6. The near-eye display device according to claim 1 or 2, wherein: A second polarization conditioning component (360) is provided on the light-emitting side of the first display screen (100), the second polarization conditioning component (360) comprises a second linear polarizer (361), the light emitted by the first display screen (100) passes through the second linear polarizer (361) to form fourth polarized light (434), and the fourth polarized light (434) passes through the polarization beam splitter (310) to form the first output light (411).

7. The near-eye display device according to claim 6, wherein: The second polarization tempering element (360) further comprises a third wave plate (362); light passes through the second linear polarizing plate (361) and the third wave plate (362) in sequence and is reflected by the first display screen (100) to form third reflected light (423); the third reflected light (423) passes through the third wave plate (362) to form fifth polarized light (435); and the polarization direction of the fifth polarized light (435) is perpendicular to the polarization direction of the second linear polarizing plate (361).

8. The near-eye display device according to claim 1, wherein: The light emitting surface of the first display screen (100) faces a first direction (X), the light emitting surface of the second display screen (200) faces a second direction (Y), and the first direction (X) and the second direction (Y) intersect; The first display screen (100), the polarization beam splitter (310), and the light output mirror (340) are arranged at intervals along the first direction (X); the second display screen (200), the polarization beam splitter (310), the concave lens (370), the first wave plate (330), and the reflector (320) are arranged at intervals along the second direction (Y); The polarization beam splitter (310) has a first side (311) and a second side (312) that are arranged opposite to each other; the first display screen (100) and the second display screen (200) are both located on the first side (311), and the concave lens (370) and the light output mirror (340) are both located on the second side (312).

9. The near-eye display device according to claim 8, wherein: The first direction (X) is perpendicular to the second direction (Y), the angle between the light emitting surface of the first display screen (100) and the plane where the polarization beam splitter (310) is located is a first angle (A), and the first angle (A) is 45°; and / or, The first direction (X) is perpendicular to the second direction (Y), the angle between the light emitting surface of the second display screen (200) and the plane where the polarization beam splitter (310) is located is a second angle (B), and the second angle (B) is 45°.

10. The near-eye display device according to claim 1, wherein: The first wave plate (330) is a quarter wave plate.

11. The near-eye display device according to claim 10, wherein: The angle between the slow axis of the first wave plate (330) and the transmission axis of the polarization beam splitter (310) is greater than or equal to 42.5° and less than or equal to 47.5°; or the angle between the slow axis of the first wave plate (330) and the transmission axis of the polarization beam splitter (310) is greater than or equal to 132.5° and less than or equal to 137.5°.

12. The near-eye display device according to claim 5, wherein: The second wave plate (352) is a quarter wave plate.

13. The near-eye display device according to claim 12, wherein: The angle between the slow axis of the second wave plate (352) and the transmission axis of the first linear polarizer (351) is greater than or equal to 42.5° and less than or equal to 47.5°; or, the angle between the slow axis of the second wave plate (352) and the transmission axis of the first linear polarizer (351) is greater than or equal to 132.5° and less than or equal to 137.5°.

14. The near-eye display device according to claim 3, wherein: The optical component further comprises a first anti-reflection portion (353), wherein the first anti-reflection portion (353) is arranged on a side of the first linear polarizing plate (351) facing away from the second display screen (200).

15. An electronic device comprising the near-eye display device according to any one of claims 1 to 14.

Images