Binocular display light engine based on single image source and apparatus and method thereof

Abstract

The application relates to a binocular display light machine based on a single image source and a device and method thereof, which can realize high-quality binocular near-eye display by using a single Micro-LED chip. The binocular display light machine based on the single image source comprises a single Micro-LED chip, a light turning assembly and left and right ocular lens groups. The Micro-LED chip is used for emitting image light along a main light emitting light path, wherein the image light comprises left-eye and right-eye light beams respectively propagating along left-eye and right-eye light emitting light paths, and the left-eye and right-eye light emitting light paths are respectively located on the left and right sides of the main light emitting light path. The light turning assembly is correspondingly arranged on the light emitting side of the Micro-LED chip and is used for bending the left-eye and right-eye light emitting light paths. The left and right ocular lens groups comprise left-eye and right-eye imaging lenses offset on the left-eye and right-eye light emitting light paths, wherein the left-eye imaging lens is used for modulating the left-eye light beam to perform left-eye imaging, and the right-eye imaging lens is used for modulating the right-eye light beam to perform right-eye imaging.

Description

Technical Field

[0001] This invention relates to the field of near-eye display technology, and in particular to a binocular display optical engine based on a single image source, as well as the device and method thereof. Background Technology

[0002] In recent years, with the rapid development and increasing maturity of new display technologies, more and more small portable projection media players, projection mobile phones and wearable display devices (such as AR / VR glasses) have been launched, making their application modes in the field of near-eye display more diversified, and their future development prospects are highly anticipated.

[0003] Currently, while near-eye display devices based on projection technologies such as LCOS, LCD, DMD, and OLED still suffer from size limitations, restricting their development for consumer use, the emergence of Micro-LED display technology has made miniaturization of near-eye display devices possible. This is because Micro-LEDs are self-emissive, eliminating the need for an illumination system and making the optical engine system more compact and lightweight. However, existing binocular display devices typically require two Micro-LED chips to provide image light for the left and right eyes respectively. The high cost of Micro-LED chips, low energy efficiency, and power consumption and heat dissipation issues are significant challenges that cannot be ignored in the development of near-eye display devices. Summary of the Invention

[0004] One advantage of this invention is that it provides a binocular display optical engine, device and method based on a single image source, which can realize high-quality binocular near-eye display using a single Micro-LED chip.

[0005] Another advantage of the present invention is that it provides a binocular display optical engine based on a single image source, and the device and method thereof. In one embodiment of the present invention, the binocular display optical engine based on a single image source can improve the energy utilization rate of a single Micro-LED chip, reduce power consumption and heat dissipation, and improve imaging quality to project high-quality left and right eye images.

[0006] Another advantage of the present invention is that it provides a binocular display optical engine based on a single image source, and the device and method thereof. In one embodiment of the present invention, the binocular display optical engine based on a single image source can effectively image two types of image light emitted by a single Micro-LED chip in different angular ranges, which helps to double the original available beam aperture angle and reduce energy waste.

[0007] Another advantage of the present invention is that it provides a binocular display optical engine based on a single image source, and the device and method thereof. In one embodiment of the present invention, the left eye imaging optical path and the right eye imaging optical path of the binocular display optical engine based on a single image source can respectively use image light emitted from a single Micro-LED chip at different angles to perform effective imaging without interference. This is beneficial to effectively compress the volume of the binocular imaging system and can realize the simplification and compactness of the binocular imaging system.

[0008] Another advantage of the present invention is that it provides a binocular display optical engine based on a single image source, and the device and method thereof. In one embodiment of the present invention, the binocular display optical engine based on a single image source can use a biased imaging lens to modulate and image light in two different angle ranges respectively, so as to double the available beam aperture angle, which helps to improve the energy utilization of a single chip.

[0009] Another advantage of the present invention is that it provides a binocular display optical engine based on a single image source, and the device and method thereof. In one embodiment of the present invention, the binocular display optical engine based on a single image source can remove the ineffective part of the imaging lens to reduce the overall size and weight of the device and meet the requirements of miniaturization and lightweighting of the product.

[0010] Another advantage of the present invention is that it provides a binocular display optical engine, device and method based on a single image source. In one embodiment of the present invention, the binocular display device can achieve high-quality binocular near-eye display using only a single Micro-LED chip, while not reducing the brightness of the binocular display image, but also improving the energy utilization rate of the single Micro-LED chip and reducing energy waste.

[0011] Another advantage of this invention is that it provides a binocular display optical engine, apparatus, and method based on a single image source, wherein expensive materials or complex structures are not required to achieve the aforementioned objectives. Therefore, this invention successfully and effectively provides a solution that not only offers a simple binocular display optical engine, apparatus, and method based on a single image source, but also increases the practicality and reliability of the single-image-source-based binocular display optical engine, apparatus, and method.

[0012] To achieve at least one of the above-mentioned advantages or other benefits and objectives of the present invention, the present invention provides a binocular display optical engine based on a single image source, comprising:

[0013] A single Micro-LED chip, wherein the Micro-LED chip is used to emit image light along the main light-emitting path, wherein the image light includes a left eye beam propagating along the left eye light-emitting path and a right eye beam propagating along the right eye light-emitting path, and the left eye light-emitting path and the right eye light-emitting path are respectively located on the left and right sides of the main light-emitting path;

[0014] A light-directing assembly, wherein the light-directing assembly is correspondingly disposed on the light-emitting side of the Micro-LED chip, for bending the left-eye light-emitting light path and the right-eye light-emitting light path, thereby correspondingly changing the propagation direction of the left-eye beam and the right-eye beam; and

[0015] A left and right eye lens assembly, wherein the left and right eye lens assembly includes a left eye imaging lens biased in the left eye light emission path and a right eye imaging lens biased in the right eye light emission path, wherein the left eye imaging lens is used to modulate the left eye beam to perform left eye imaging, and the right eye imaging lens is used to modulate the right eye beam to perform right eye imaging.

[0016] According to one embodiment of this application, the left optical axis of the left imaging lens is deviated from the left optical path of the Micro-LED chip, and the right optical axis of the right imaging lens is deviated from the right optical path of the Micro-LED chip.

[0017] According to one embodiment of this application, the light steering assembly includes a reflector, wherein the reflector has a left eye reflector located on the left side of the main light-emitting path of the Micro-LED chip and a right eye reflector located on the right side of the main light-emitting path of the Micro-LED chip, and the left eye imaging lens and the right eye imaging lens are respectively located on the reflective side of the left eye reflector and the reflective side of the right eye reflector.

[0018] According to one embodiment of this application, the left and right eye reflective surfaces of the reflective device are both total internal reflective surfaces.

[0019] According to one embodiment of this application, the light-emitting device includes a left eye reflecting prism providing the left eye reflecting surface, a right eye reflecting prism providing the right eye reflecting surface, and a compensation prism, wherein the compensation prism is respectively glued to the left eye reflecting prism and the right eye reflecting prism.

[0020] According to one embodiment of this application, the left eye reflecting prism, the right eye reflecting prism, and the compensation prism are all right-angle prisms, and the inclined surface of the compensation prism is perpendicular to the main light-emitting path of the Micro-LED chip.

[0021] According to one embodiment of this application, the light steering assembly further includes a left-eye deflection element corresponding to the left-eye light emission path and a right-eye deflection element corresponding to the right-eye light emission element, wherein the left-eye deflection element is located on the light-emitting side of the left-eye imaging lens and is used to deflect the extension direction of the left-eye light emission path, and the right-eye deflection element is located on the light-emitting side of the right-eye imaging lens and is used to deflect the extension direction of the right-eye light emission path.

[0022] According to one embodiment of this application, both the left-eye deflection element and the right-eye deflection element are reflective prisms, wherein the left-eye light emission path and the right-eye light emission path before reflection by the reflective surface of the reflective prism are respectively perpendicular to the incident surface of the reflective prism, and the left-eye light emission path and the right-eye light emission path after reflection by the reflective surface of the reflective prism are respectively perpendicular to the exit surface of the reflective prism.

[0023] According to one embodiment of this application, the reflective prism is a triangular prism or a wedge prism.

[0024] According to one embodiment of this application, both the left eye imaging lens and the right eye imaging lens are circular lenses or D-type lenses.

[0025] According to another aspect of this application, this application further provides a near-eye display device, comprising:

[0026] Equipment body; and

[0027] The binocular display optical engine based on a single image source as described in any of the preceding claims, wherein the binocular display optical engine based on a single image source is configured in the device body, and the device body is used to transmit the left eye beam and the right eye beam projected by the binocular display optical engine based on the single image source for binocular near-eye display.

[0028] According to another aspect of this application, this application further provides a binocular imaging method, including the steps of:

[0029] The left and right eye light-emitting light paths of a single Micro-LED chip are bent by the light-directing component, wherein the left and right eye light-emitting light paths are located on the left and right sides of the main light-emitting light path of the single Micro-LED chip, respectively.

[0030] Left-eye imaging is achieved by modulating the left-eye beam propagating along the left-eye light path using a biased left-eye imaging lens; and

[0031] Right eye imaging is achieved by modulating the right eye beam propagating along the right eye's light path using a biased right eye imaging lens. Attached Figure Description

[0032] Figure 1This is a schematic diagram of the structure of a binocular display optical engine based on a single image source according to an embodiment of this application;

[0033] Figure 2 An enlarged schematic diagram of the reflective device in the single-source binocular display optical engine according to the above embodiments of this application is shown;

[0034] Figure 3 A schematic diagram showing the light-emitting state of the Micro-LED chip in the binocular display optical engine based on a single image source according to the above embodiments of this application is shown.

[0035] Figure 4 A schematic diagram of the optical path of the binocular display optical engine based on a single image source according to the above embodiments of this application is shown;

[0036] Figure 5 A modified embodiment of the single-image-source-based binocular display optical engine according to the above embodiments of this application is shown;

[0037] Figure 6 This is a schematic diagram of the structure of a near-eye display device according to an embodiment of this application;

[0038] Figure 7 This is a schematic flowchart of a binocular imaging method according to an embodiment of this application.

[0039] Key component symbols: 1. Optical engine for binocular display based on a single image source; 10. Micro-LED chip; 110. Main light-emitting path; 111. Left eye light-emitting path; 112. Right eye light-emitting path; 100. Image light; 101. Left eye beam; 102. Right eye beam; 20. Light steering assembly; 21. Reflecting device; 210. Total internal reflection surface; 2101. Left eye reflection surface; 2102. Right eye reflection surface; 211. Left eye reflecting prism; 212. Right eye reflecting prism; 21... 3. Compensating prism; 22. Left eye deflection element; 23. Right eye deflection element; 220. Reflecting prism; 2201. Light-incident surface; 2202. Light-out surface; 2203. Reflecting surface; 221. Triangular prism; 222. Wedge prism; 30. Left and right eye lens groups; 31. Left eye imaging lens; 310. Left eye axis; 32. Right eye imaging lens; 320. Right eye axis; 301. Circular lens; 302. D-type lens; 5. Main body of the device; 51. Left eye waveguide; 52. Right eye waveguide.

[0040] The above description of the main component symbols, together with the accompanying drawings and specific embodiments, provides a further detailed explanation of this application. Detailed Implementation

[0041] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0042] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0043] In this invention, the term "a" in the claims and specification should be understood as "one or more," that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. Unless explicitly indicated in the disclosure of this invention that the number of the element is only one, the term "a" should not be construed as unique or single, and the term "a" should not be construed as a limitation on the quantity.

[0044] In the description of this invention, it should be understood that terms such as "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, terms such as "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through a medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0046] Existing binocular display devices typically use two Micro-LED chips to provide image light for the left and right eyes respectively. However, the high cost of Micro-LED chips leads to high device costs, and they also cause serious power consumption and heat dissipation problems, which have always been unavoidable issues in the development of near-eye display systems. Furthermore, because Micro-LED chips have a relatively large emission angle, existing binocular display devices can only utilize the beam within a certain aperture angle emitted by the Micro-LED chip, wasting energy at other angles. Therefore, the usable beam aperture angle of existing binocular display devices is relatively small, resulting in low energy utilization.

[0047] To address the aforementioned issues, this application creatively proposes a binocular near-eye display scheme based on a single Micro-LED chip. By utilizing two beams emitted from the single Micro-LED chip within two different emission angle ranges for left-eye and right-eye imaging respectively, the original usable beam aperture angle is doubled, thereby maximizing the utilization of the emitted energy of the single Micro-LED chip and reducing energy waste.

[0048] Refer to the accompanying drawings in the specification of this application. Figures 1 to 4According to one embodiment of this application, a binocular display optical engine 1 based on a single image source is provided, which is suitable for use with an optical waveguide to form a near-eye display device capable of realizing binocular display. Specifically, the binocular display optical engine 1 based on a single image source may include a single Micro-LED chip 10, a light steering component 20, and left and right eye lens groups 30. The Micro-LED chip 10 is used to emit an image light 100 along the main light emission path 110, wherein the image light 100 includes a left eye beam 101 propagating along the left eye light emission path 111 and a right eye beam 102 propagating along the right eye light emission path 112, and the left eye light emission path 111 and the right eye light emission path 112 are respectively located on the left and right sides of the main light emission path 110. The light-directing component 20 is correspondingly disposed on the light-emitting side of the Micro-LED chip 10, and is used to bend the left eye light-emitting light path 111 and the right eye light-emitting light path 112 to correspondingly change the propagation direction of the left eye beam 101 and the right eye beam 102. The left and right eye lens group 30 includes a left eye imaging lens 31 biased on the left eye light-emitting light path 111 and a right eye imaging lens 32 biased on the right eye light-emitting light path 112, wherein the left eye imaging lens 31 is used to modulate the left eye beam 101 for left eye imaging, and the right eye imaging lens 32 is used to modulate the right eye beam 102 for right eye imaging.

[0049] It is worth noting that the main light-emitting optical path 110 of this application is perpendicular to the light-emitting surface of the Micro-LED chip 10, and the left eye beam 101 and the right eye beam 102 are located on the left and right sides of the main light-emitting optical path 110, respectively, to perform left-eye imaging and right-eye imaging accordingly, thereby realizing binocular display. In other words, the emission angle range of the left eye beam 101 and the emission angle range of the right eye beam 102 do not overlap, effectively doubling the originally usable beam aperture angle, thus utilizing the emitted energy of the Micro-LED chip 10 to a greater extent. This not only reduces energy waste but also reduces the number of Micro-LED chips required for the binocular display optical engine, lowering cost and power consumption. It is understood that the beam aperture angle mentioned in this application refers to the beam filling the aperture stop, which characterizes the system's light-gathering capability.

[0050] For example, such as Figure 3As shown, in the image light 100 emitted via the Micro-LED chip 10: the emission angle of the left eye beam 101 can be, but is not limited to, a negative angle, i.e., a beam of light propagating towards the upper left in the image light 100 emitted via the Micro-LED chip 10; correspondingly, the emission angle of the right eye beam 102 can be, but is not limited to, a positive angle, i.e., a beam of light propagating towards the upper right in the image light 100 emitted via the Micro-LED chip 10.

[0051] Understandably, while existing technologies utilize a single display chip to achieve binocular display, these typically employ a beam splitter to divide the beam emitted from the display chip at the same angle into two beams for left and right eye imaging respectively. This approach not only utilizes beams within a certain aperture angle, wasting energy at other angles, but also reduces the light energy of each beam by half or even less due to the splitting, resulting in lower brightness for both left and right eye displays, failing to meet user needs. Significantly increasing the emission energy of the Micro-LED chip to improve brightness would generate even greater power consumption and cause more severe heat dissipation problems. In contrast, the left eye beam 101 and right eye beam 102 of this application are respectively propagated through the light steering component 20 to the left eye imaging lens 31 and right eye imaging lens 32 for modulation, enabling the single-source binocular display optical engine 1 to utilize light emitted from the Micro-LED chip 10 at different angles for imaging without interference.

[0052] It is worth noting that, considering that the edge beam aperture angle in a traditional imaging system is symmetrically distributed relative to the optical axis of the imaging lens, it is not suitable for imaging systems with light rays of the same aperture angle (such as the left eye beam 101 and the right eye beam 102 described in this application). Therefore, in the binocular display optical engine 1 based on a single image source described in this application, the left eye imaging lens 31 and the right eye imaging lens 32 are respectively biased onto the left eye light emission path 111 and the right eye light emission path 112 to achieve modulation imaging of the left eye beam 101 and the right eye beam 102 with the same aperture angle, which helps to improve the binocular display quality.

[0053] In particular, since both the left imaging lens 31 and the right imaging lens 32 are offset, both the left imaging lens 31 and the right imaging lens 32 preferably adopt large-aperture and wide-field circular lenses 301 to better realize single-source binocular display.

[0054] More specifically, such as Figure 1 and Figure 4As shown, the left eye optical axis 310 of the left eye imaging lens 31 is offset from the left eye light emission path 111 of the Micro-LED chip 10, and the right eye optical axis 320 of the right eye imaging lens 32 is offset from the right eye light emission path 112 of the Micro-LED chip 10, so that the left eye beam 101 is modulated using only one side area of ​​the left eye imaging lens 31 for left eye imaging, and the right eye beam 102 is modulated using only one side area of ​​the right eye imaging lens 32 for right eye imaging.

[0055] According to the above embodiments of this application, as Figure 1 , Figure 2 as well as Figure 4 As shown, the light steering assembly 20 may include a reflector 21, wherein the reflector 21 has a left eye reflector 2101 located to the left of the main light-emitting optical path 110 of the Micro-LED chip 10 and a right eye reflector 2102 located to the right of the main light-emitting optical path 110 of the Micro-LED chip 10, and the left eye imaging lens 31 and the right eye imaging lens 32 are respectively located on the reflection side of the left eye reflector 2101 and the reflection side of the right eye reflector 2102, wherein the left eye reflector 2101 is used to reflectively bend the left eye light-emitting optical path 111 so that the left eye beam 101 is reflected by the left eye reflector 2101 to propagate to the left eye imaging lens 31 and be modulated; and the right eye reflector 2102 is used to reflectively bend the right eye light-emitting optical path 112 so that the right eye beam 102 is reflected by the right eye reflector 2102 to propagate to the right eye imaging lens 32 and be modulated.

[0056] In other words, the left eye reflective surface 2101 of the reflective device 21 is located in the optical path between the Micro-LED chip 10 and the left eye imaging lens 31, such that the Micro-LED chip 10 and the left eye imaging lens 31 are respectively located on the incident side and the reflection side of the left eye reflective surface 2101, so as to jointly define the bent left eye light emission path 111; correspondingly, the right eye reflective surface 2102 of the reflective device 21 is located in the optical path between the Micro-LED chip 10 and the right eye imaging lens 32, such that the Micro-LED chip 10 and the right eye imaging lens 32 are respectively located on the incident side and the reflection side of the right eye reflective surface 2102, so as to jointly define the bent right eye light emission path 112.

[0057] Preferably, such as Figure 1 and Figure 2As shown, the left eye reflecting surface 2101 and the right eye reflecting surface 2102 of the reflective device 21 are both implemented as total internal reflection surfaces 210, so as to bend the left eye light emission path 111 and the right eye light emission path 112 by total internal reflection, respectively. In other words, the left eye beam 101 satisfies the critical total internal reflection condition when it propagates to the left eye reflecting surface 2101, so as to be totally reflected to the left eye imaging lens 31; correspondingly, the right eye beam 102 satisfies the critical total internal reflection condition when it propagates to the right eye reflecting surface 2102, so as to be totally reflected to the right eye imaging lens 32.

[0058] For example, such as Figure 1 and Figure 2 As shown, the reflective device 21 of the light steering assembly 20 may include a left eye reflecting prism 211, a right eye reflecting prism 212, and a compensation prism 213, wherein the two sides of the compensation prism 213 are respectively glued to one side of the left eye reflecting prism 211 and one side of the right eye reflecting prism 212, and the other side of the left eye reflecting prism 211 and the other side of the right eye reflecting prism 212 serve as the left eye reflecting surface 2101 and the right eye reflecting surface 2102, respectively.

[0059] In other words, the left eye reflecting prism 211 of the reflective device 21 is used to provide the left eye reflecting surface 2101 and make the left eye beam 101 satisfy the critical total internal reflection condition at the left eye reflecting surface 2101; the right eye reflecting prism 212 of the reflective device 21 is used to provide the right eye reflecting surface 2102 and make the right eye beam 102 satisfy the critical total internal reflection condition at the right eye reflecting surface 2102; the compensation prism 213 is used to compensate the optical path between the Micro-LED chip 10 and the left eye reflecting prism 211 and the right eye reflecting prism 212 respectively, so as to improve the binocular display quality of the binocular display optical engine 1 based on a single image source while ensuring that the left eye beam 101 and the right eye beam 102 satisfy the critical total internal reflection condition at the left eye reflecting surface 2101 and the right eye reflecting surface 2102 respectively.

[0060] Preferably, the left eye reflecting prism 211, the right eye reflecting prism 212, and the compensation prism 213 are all right-angle prisms, and the inclined surface of the compensation prism 213 is perpendicular to the main light-emitting path 110 of the Micro-LED chip 10, serving as the common incident surface of the reflective device 21; and the two right-angled sides of the compensation prism 213 are respectively glued to one right-angled side of the left eye reflecting prism 211 and the right eye reflecting prism 212. In other words, the reflective device 21 is composed of three right-angled prisms glued together, which helps to reduce the assembly difficulty of the reflective device 21, improve the compactness of the overall structure, and meet the requirements of product miniaturization and lightweighting.

[0061] It is worth noting that, in another example of this application, the reflective device 21 of the light steering assembly 20 can also be implemented as an integrally formed irregularly shaped prism, as long as it can provide two critical total internal reflection surfaces to serve as the left eye reflective surface 2101 and the right eye reflective surface 2102 respectively. This application will not elaborate further on this. It is understood that the surface shape of the left eye reflective surface 2101 and the right eye reflective surface 2102 can be selected from one of a plane, an aspherical surface, and a freeform surface.

[0062] In addition, in other examples of this application, the left eye reflective surface 2101 and the right eye reflective surface 2102 in the reflective device 21 of the light steering component 20 can also be implemented as functional surfaces coated with reflective films, such as the two sides of a prism being coated with metal reflective films, etc., which can still achieve the effect of correspondingly bending the left eye light emission path 111 and the right eye light emission path 112. This application will not elaborate further on this.

[0063] According to the above embodiments of this application, as Figure 1 and Figure 4 As shown, the light steering assembly 20 may further include a left-eye deflection element 22 corresponding to the left-eye light emission path 111 and a right-eye deflection element 23 corresponding to the right-eye light emission path 112. The left-eye deflection element 22 is located on the light-emitting side of the left-eye imaging lens 31 and is used to deflect the extension direction of the left-eye light emission path 111, thereby changing the propagation direction of the left-eye beam 101 emitted from the left-eye imaging lens 31 so as to propagate to the optical waveguide corresponding to the left eye and realize left-eye display. The right-eye deflection element 23 is located on the light-emitting side of the right-eye imaging lens 32 and is used to deflect the extension direction of the right-eye light emission path 112, thereby changing the propagation direction of the right-eye beam 102 emitted from the right-eye imaging lens 32 so as to propagate to the optical waveguide corresponding to the right eye and realize right-eye display.

[0064] In other words, the left eye imaging lens 31 is located in the optical path between the left eye deflection element 22 and the left eye reflecting surface 2101 of the reflector 21, so that the left eye light emission path 111 is bent twice by the left eye reflecting surface 2101 and the left eye deflection element 22, which facilitates the propagation of the left eye beam 101 to the coupling area of ​​the optical waveguide corresponding to the left eye; and the right eye imaging lens 32 is located in the optical path between the right eye deflection element 23 and the right eye reflecting surface 2102 of the reflector 21, so that the right eye light emission path 112 is bent twice by the right eye reflecting surface 2102 and the right eye deflection element 23, which facilitates the propagation of the right eye beam 102 to the coupling area of ​​the optical waveguide corresponding to the right eye.

[0065] Specifically, such as Figure 1 and Figure 4 As shown, the left-eye deflecting element 22 and the right-eye deflecting element 23 can be, but are not limited to, implemented as a reflective prism 220, used to reflectively deflect the left-eye light emission path 111 and the right-eye light emission path 112, so as to change the propagation direction of the left-eye beam 101 and the right-eye beam 102 by reflection, so that they propagate to the coupling regions of the left-eye waveguide and the right-eye waveguide respectively. It is understood that in other examples of this application, the left-eye deflecting element 22 and the right-eye deflecting element 23 can also be implemented as a plane mirror, as long as it can reflect the left-eye beam 101 and the right-eye beam 102 according to the display requirements, which will not be elaborated further in this application.

[0066] Preferably, each of the reflective prisms 220 has an incident surface 2201, an exit surface 2202, and a reflective surface 2203. The left eye light path 111 and the right eye light path 112, before reflection by the reflective surface 2203 of the reflective prism 220, are respectively perpendicular to the incident surface 2201 of the reflective prism 220. The left eye light path 111 and the right eye light path 112, after reflection by the reflective surface 2203 of the reflective prism 220, are respectively perpendicular to the incident surface 2201 of the reflective prism 220. The light-emitting light path 112 is perpendicular to the light-emitting surface 2202 of the reflective prism 220, so that the light rays in the left eye beam 101 and the right eye beam 102 that propagate along the left eye light-emitting light path 111 and the right eye light-emitting light path 112 respectively enter the light-incident surface 2201 of the reflective prism 220 perpendicularly, and exit the light-emitting surface 2202 of the reflective prism 220 perpendicularly, which helps to ensure a better binocular near-eye display effect.

[0067] Optionally, such as Figure 1 and Figure 4As shown, the reflective prism 220 can be, but is not limited to, a triangular prism 221, and the left eye beam 101 and the right eye beam 102 satisfy the critical total internal reflection condition at the reflective surface 2203 of the reflective prism 220. Of course, in other examples of this application, the reflective surface 2203 of the reflective prism 220 can also be coated with a reflective film to avoid light energy loss.

[0068] It is worth noting that in the above embodiments of this application, the light-emitting surfaces of the left eye deflection element 22 and the right eye deflection element 23 can face the same direction as the light-emitting surface of the Micro-LED chip 10, such that the Micro-LED chip 10 and the optical waveguide are located on opposite sides of the light-directing assembly 20. Of course, in other examples of this application, the light-emitting surfaces of the left eye deflection element 22 and the right eye deflection element 23 can also face the opposite direction to the light-emitting surface of the Micro-LED chip 10, such that the Micro-LED chip 10 and the optical waveguide are located on the same side of the light-directing assembly 20. This application will not elaborate further on this aspect.

[0069] Furthermore, in the above embodiments of this application, such as Figure 1 and Figure 4 As shown, the left eye imaging lens 31 and the right eye imaging lens 32 in the left and right eye lens group 30 are both complete circular lenses 301. Although they can effectively modulate the left eye beam 101 and the right eye beam 102 to achieve high-quality left eye imaging and right eye imaging respectively, due to the offset setting of the left eye imaging lens 31 and the right eye imaging lens 32, a portion of the circular lens 301 that deviates from the left eye light emission path 111 or the right eye light emission path 112 is a useless area (e.g., Figure 4 The area inside the dashed frame shown is the useless area, which does not participate in beam modulation. Therefore, the useless area in the circular lens 301 can be cut off to form a D-type lens, which helps to reduce the weight of the binocular display optical engine 1 based on a single image source.

[0070] For example, Appendix Figure 5A modified embodiment of the single-image-source-based binocular display optical engine 1 according to the above embodiments of this application is shown. Specifically, compared with the above embodiments of this application, the difference of the single-image-source-based binocular display optical engine 1 according to the modified embodiment of this application is that: both the left eye imaging lens 31 and the right eye imaging lens 32 are implemented as D-type lenses 302, that is, the lenses in the left eye imaging lens 31 and the right eye imaging lens 32 are D-type lenses with the useless areas removed, which helps to reduce the size and weight of the left eye imaging lens 31 and the right eye imaging lens 32, making the single-image-source-based binocular display optical engine 1 more in line with the development trend of small size and light weight.

[0071] It is worth noting that when the reflective prism 220 in the light steering assembly 20 is implemented as the triangular prism 221, a portion of the apex region of the triangular prism 221 does not participate in the light path reflection. Therefore, the invalid region in the triangular prism 221 of the binocular display optical engine 1 based on a single image source according to the above embodiments of this application can also be cut off to form a wedge prism, which helps to further reduce the weight of the binocular display optical engine 1 based on a single image source.

[0072] In other words, in the single-image-source-based binocular display optical engine 1 of the modified embodiments described in this application, as... Figure 5 As shown, both the left eye deflection element 22 and the right eye deflection element 23 can be implemented as wedge prisms 222, that is, the reflective prism 220 is implemented as the wedge prism 222, so that the left eye beam 101 and the right eye beam 102 first pass perpendicularly through the upper side of the corresponding wedge prism 222, and satisfy the critical total internal reflection condition on the lower side of the corresponding wedge prism 222, so that after total internal reflection, they are emitted perpendicularly from one end face of the wedge prism 222.

[0073] It is worth mentioning that, referring to the accompanying drawings in this application's specification... Figure 6 According to an embodiment of this application, a near-eye display device is further provided, wherein the near-eye display device includes a device body 5 and the aforementioned binocular display optical engine 1 based on a single image source, wherein the binocular display optical engine 1 based on a single image source is disposed on the device body 5, and the device body 5 is used to transmit the left eye beam 101 and the right eye beam 102 projected via the binocular display optical engine 1 based on a single image source, so as to be incident on the user's left eye and right eye respectively, thereby realizing binocular near-eye display.

[0074] For example, such as Figure 6As shown, the main body 5 of the device includes a left eye waveguide 51 and a right eye waveguide 52. The left eye deflection element 22 in the light steering assembly 20 of the binocular display optical engine 1 based on a single image source corresponds to the left eye waveguide 51, so as to transmit the left eye beam 101 to the user's left eye through the left eye waveguide 51 to achieve left eye near-eye display. The right eye deflection element 23 in the light steering assembly 20 of the binocular display optical engine 1 based on a single image source corresponds to the right eye waveguide 52, so as to transmit the right eye beam 102 to the user's right eye through the right eye waveguide 52 to achieve right eye near-eye display.

[0075] It is worth noting that in the above embodiments of this application, the left eye waveguide 51 and the right eye waveguide 52 are independent of each other. However, in another example of this application, the left eye waveguide 51 and the right eye waveguide 52 can also be integrated, as long as the left eye beam 101 and the right eye beam 102 can be transmitted to the user's left eye and right eye respectively to achieve binocular near-eye display. This application will not elaborate on this point.

[0076] Furthermore, in other embodiments of this application, the device body 5 of the near-eye display device may also be implemented as, but is not limited to, other functional components such as a bird bath or a reflector, capable of transmitting the left eye beam 101 and the right eye beam 102 to the user's left eye and right eye respectively, which will not be elaborated upon in this application.

[0077] It is worth mentioning that, referring to the accompanying drawings in this application's specification... Figure 7 According to an embodiment of this application, a binocular imaging method is further provided, which may include the steps of:

[0078] S100: The left and right light-emitting light paths of a single Micro-LED chip are bent by the light-directing component, wherein the left and right light-emitting light paths are located on the left and right sides of the main light-emitting light path of the single Micro-LED chip, respectively.

[0079] S200: Left-eye imaging is performed by modulating the left-eye beam propagating along the left-eye emission path via a biased left-eye imaging lens; and

[0080] S300: Right eye imaging is performed by modulating the right eye beam propagating along the right eye light path via the biased right eye imaging lens.

[0081] It is worth noting that, although in Figure 7The steps are drawn and described in the order of S100, S200, and S300, but this does not constitute a restriction on the order of the steps. In fact, steps S200 and S300 are performed simultaneously, and steps S200 and S300 can be performed after step S100, or during step S100, i.e., between two turns; they can even be performed before step S100, which will not be elaborated further in this application.

[0082] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A binocular display light engine based on a single image source, characterized in that, The application relates to a Micro-LED display device, comprising: a single Micro-LED chip, wherein the Micro-LED chip is used for emitting image light along a main light-emitting light path, wherein the image light comprises a left-eye light beam propagating along a left-eye light-emitting light path and a right-eye light beam propagating along a right-eye light-emitting light path, and the left-eye light-emitting light path and the right-eye light-emitting light path are respectively located on the left and right sides of the main light-emitting light path, so that the left-eye light beam and the right-eye light beam are respectively located on the left and right sides of the main light-emitting light path, and the range of the exit angle of the left-eye light beam and the range of the exit angle of the right-eye light beam are disjointed; a light turning assembly, wherein the light turning assembly is arranged on the light-emitting side of the Micro-LED chip, and is used for bending the left-eye light-emitting light path and the right-eye light-emitting light path to correspondingly change the propagation direction of the left-eye light beam and the right-eye light beam; the light turning assembly comprises a reflecting device, wherein the reflecting device has a left-eye reflecting surface located on the left side of the main light-emitting light path of the Micro-LED chip and used for reflecting the left-eye light beam, and a right-eye reflecting surface located on the right side of the main light-emitting light path of the Micro-LED chip and used for reflecting the right-eye light beam; and left and right eye lens groups, wherein the left and right eye lens groups comprise a left-eye imaging lens offset from the left-eye light-emitting light path and a right-eye imaging lens offset from the right-eye light-emitting light path, wherein the left-eye imaging lens is used for modulating the left-eye light beam to perform left-eye imaging, and the right-eye imaging lens is used for modulating the right-eye light beam to perform right-eye imaging; the left-eye imaging lens and the right-eye imaging lens are both D-shaped lenses, wherein the D-shaped lens is a lens formed by cutting off the useless area in a round lens.

2. The single source based binocular display light engine of claim 1, wherein, the left-eye optical axis of the left-eye imaging lens deviates from the left-eye light-emitting light path of the Micro-LED chip, and the right-eye optical axis of the right-eye imaging lens deviates from the right-eye light-emitting light path of the Micro-LED chip.

3. The single image source based binocular display light engine of claim 2, wherein, the left-eye imaging lens and the right-eye imaging lens are respectively arranged on the reflection side of the left-eye reflecting surface and the reflection side of the right-eye reflecting surface.

4. The single image source based binocular display light engine of claim 3, wherein, the left-eye reflecting surface and the right-eye reflecting surface of the reflecting device are both total internal reflection surfaces.

5. The single image source based binocular display light engine of claim 4, wherein, the reflecting device comprises a left-eye reflecting prism providing the left-eye reflecting surface, a right-eye reflecting prism providing the right-eye reflecting surface, and a compensating prism, and the compensating prism is correspondingly cemented to the left-eye reflecting prism and the right-eye reflecting prism.

6. The single image source based binocular display light engine of claim 5, wherein, the left-eye reflecting prism, the right-eye reflecting prism and the compensating prism are all right-angle prisms, and the inclined surface of the compensating prism is perpendicular to the main light-emitting light path of the Micro-LED chip.

7. The single image source based binocular display light engine of claim 3, wherein, the light turning assembly further comprises a left-eye deflection element corresponding to the left-eye light-emitting light path and a right-eye deflection element corresponding to the right-eye light-emitting light path, wherein the left-eye deflection element is located on the light-emitting side of the left-eye imaging lens and is used for deflecting the extension direction of the left-eye light-emitting light path, and the right-eye deflection element is located on the light-emitting side of the right-eye imaging lens and is used for deflecting the extension direction of the right-eye light-emitting light path.

8. The single image source based binocular display light engine of claim 7, wherein, The left eye deflecting element and the right eye deflecting element are both reflective prisms, wherein the left eye light emitting light path and the right eye light emitting light path before being reflected via a reflecting surface of the reflective prisms correspondingly perpendicularly to an incident light surface of the reflective prisms, and the left eye light emitting light path and the right eye light emitting light path after being reflected via the reflecting surface of the reflective prisms correspondingly perpendicularly to an emergent light surface of the reflective prisms.

9. The single image source based binocular display light engine of claim 8, wherein, The reflective prisms are triple prisms or wedge prisms.

10. A near-eye display device, characterized by, Comprising: a device body; and The binocular display light engine based on a single image source as claimed in any one of claims 1 to 9, wherein the binocular display light engine based on a single image source is configured in the device body, and the device body is used to transmit left eye light beams and right eye light beams projected via the binocular display light engine based on a single image source for binocular near-eye display.

11. A binocular imaging method, characterized by, For the binocular display light engine based on a single image source as claimed in any one of claims 1 to 9, comprising steps of: bending a left eye light emitting light path and a right eye light emitting light path of a single Micro-LED chip via a light turning assembly, wherein the left eye light emitting light path and the right eye light emitting light path are respectively located on left and right sides of a main light emitting light path of the single Micro-LED chip; modulating left eye light beams propagating along the left eye light emitting light path via a biased left eye imaging lens for left eye imaging; and modulating right eye light beams propagating along the right eye light emitting light path via a biased right eye imaging lens for right eye imaging.

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