Full-color augmented reality device

Abstract

The application discloses a full-color augmented reality device, which comprises a device main body, a first light machine, a second light machine and a waveguide sheet. The first light machine is arranged on a first side of the device main body, the second light machine is arranged on a second side of the device main body, and the waveguide sheet is arranged on the device main body and has a first entrance pupil area, a first exit pupil area, a second entrance pupil area and a second exit pupil area. Light emitted by the first light machine is incident into the waveguide sheet from the first entrance pupil area and is emitted to a human eye from the first exit pupil area. Light emitted by the second light machine is incident into the waveguide sheet from the second entrance pupil area and is emitted to the human eye from the second exit pupil area. The first light machine comprises one or two first micro display devices, the second light machine comprises one or two second micro display devices, and the light emitted by the first micro display devices and the second micro display devices comprises red light, green light and blue light, so that the light emitted by the first micro display devices and the second micro display devices can be combined into a full-color image in the human eye.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a full-color augmented reality device. Background Technology

[0002] Augmented Reality (AR) is a technology that merges the virtual world with the real world. It has been widely applied in education, gaming, healthcare, the Internet of Things, smart manufacturing, and many other fields.

[0003] Among them, augmented reality (AR) devices, as a type of portable device that blends the virtual and the real, can display virtual scenes on the basis of displaying real scenes. Users can even interact with the virtual scenes. It is a new form of smart hardware products in the future and has attracted widespread attention from developers and users, with broad market prospects.

[0004] However, most AR devices in related technologies are large and heavy, making them not only bulky in appearance but also very uncomfortable for users to wear for extended periods, resulting in a poor user experience. Utility Model Content

[0005] This application discloses a full-color augmented reality device that can reduce the overall size and weight of the full-color augmented reality device while achieving a full-color display effect, thereby improving the wearing comfort of the full-color augmented reality device.

[0006] To achieve the above objectives, this application discloses a full-color augmented reality device, which includes:

[0007] The device body has a first side and a second side opposite to each other in a first direction;

[0008] The first optical engine is disposed on the first side;

[0009] The second optical engine is disposed on the second side;

[0010] A waveguide sheet is disposed on the main body of the device, and the waveguide sheet has a first entrance pupil region, a first exit pupil region, a second entrance pupil region, and a second exit pupil region;

[0011] The light emitted by the first optical engine enters the waveguide plate from the first entrance pupil region and exits into the human eye from the first exit pupil region; the light emitted by the second optical engine enters the waveguide plate from the second entrance pupil region and exits into the human eye from the second exit pupil region.

[0012] The first optical engine includes one or two first micro-display devices, and the second optical engine includes one or two second micro-display devices. The light emitted by the first micro-display devices and the second micro-display devices includes red light, green light, and blue light, so that the light emitted by the first micro-display devices and the second micro-display devices can be combined into a full-color image in the human eye.

[0013] In the full-color augmented reality device provided in this application embodiment, by controlling the sum of the number of micro-display devices of the two optical engines (i.e., the first optical engine and the second optical engine) to two, three or four, and by making the light emitted by the micro-display devices of the two optical engines include red light, green light and blue light, the micro-display devices of the two optical engines can provide the human eye with light of the three basic colors of red, green and blue, so that the light output by the two optical engines can be superimposed in the human eye to form a full-color image, thereby achieving the effect of full-color display. Compared to a design where each optical engine includes red, green, and blue microdisplays, resulting in a total of six microdisplays on both sides, the number of microdisplays on each side of the optical engine in this application is reduced. This not only reduces the size, weight, and cost of the full-color augmented reality device, but also lowers its power consumption. Consequently, the full-color augmented reality device can have a longer battery life or a smaller battery, making it lighter, more wearable, and improving its comfort.

[0014] It is evident that by adopting the technical solution of this application, a full-color image can be formed in the human eye while reducing the total number of micro-display devices in the optical engines on both sides, thereby reducing the overall size and weight of the full-color augmented reality device and improving the wearing comfort of the full-color augmented reality device.

[0015] As an optional implementation, in the embodiments of this application, there is only one first microdisplay device and one second microdisplay device, and at least one of the first microdisplay device and the second microdisplay device is a dual-color microdisplay device. This ensures that the light emitted by the first microdisplay device and the second microdisplay device includes red light, green light, and blue light, achieving a full-color display effect.

[0016] In the above scheme, since both the first and second optical engines utilize a single microdisplay device, an X-cube combining prism is unnecessary. This reduces the size and weight of both optical engines, further decreasing the size and weight of the full-color augmented reality device. This makes the device more wearable and improves its comfort. Moreover, the elimination of the X-cube combining prism also lowers the cost of the full-color augmented reality device.

[0017] Furthermore, in the X-cube combining prism solution, because the microdisplay device has a certain emission angle and the reflective film of the X-cube combining prism has a certain angle selectivity, in actual use, the light emitted by the microdisplay device will experience some light loss when passing through the X-cube combining prism, thus losing some light. The above solution eliminates the need for an X-cube combining prism, which can reduce the light loss of the optical engines on both sides.

[0018] As an optional implementation, in the embodiments of this application, one of the first microdisplay device and the second microdisplay device is a dual-color microdisplay device, and the other of the first microdisplay device and the second microdisplay device is a monochrome microdisplay device;

[0019] The dual-color micro-display device includes a stacked green light-emitting layer and a blue light-emitting layer, with the blue light-emitting layer located between the green light-emitting layer and the waveguide sheet. The monochrome micro-display device is a red micro-display device. Thus, the green-blue image seen by one eye and the red image seen by the other eye are combined to form a full-color image, achieving the effect of full-color display.

[0020] In the above scheme, the red microdisplay device is independently located on one side of the device body, allowing it to be driven independently. This enables the red microdisplay device to obtain a larger driving current, increasing the brightness of the red light and thus improving the overall brightness of the full-color augmented reality device. Moreover, compared to the method where each side of the optical engine includes a red, green, and blue microdisplay device, the total number of microdisplay devices in this application is less, resulting in lower power consumption. For example, the power consumption of the full-color augmented reality device can be reduced by about half, allowing for longer battery life or the use of smaller batteries, which in turn makes the full-color augmented reality device lighter and more suitable for wearing.

[0021] Furthermore, in dual-color microdisplay devices, the green light-emitting layer is located below the blue light-emitting layer. The light emitted from the green light-emitting layer passes through the blue light-emitting material. Since the band gap of blue light is wider than that of green light (e.g., the band gap of blue light is 3.4 eV and that of green light is 2.4 eV), and the band gap of blue light is larger than that of green light, the wide band gap material cannot be absorbed by the narrow band gap material. Therefore, the green light penetrates the blue light-emitting material without being absorbed, and the green light is basically without loss. The blue light is emitted directly. Thus, the above scheme can reduce the optical loss of the two optical engines.

[0022] As an optional implementation, in the embodiments of this application, both the first microdisplay device and the second microdisplay device are dual-color microdisplay devices; wherein,

[0023] The first microdisplay device includes a first red light-emitting layer and a first green light-emitting layer stacked together, wherein the first green light-emitting layer is located between the first red light-emitting layer and the waveguide sheet;

[0024] The second microdisplay device includes a second red light-emitting layer and a second blue light-emitting layer stacked together, with the second blue light-emitting layer located between the second red light-emitting layer and the waveguide sheet.

[0025] In the above scheme, both the first and second micro-display devices can provide red light, thereby compensating for the red light and increasing its brightness. This, in turn, improves the overall brightness of the full-color augmented reality device, ensuring the brightness of the full-color image. Moreover, compared to the approach where each optical engine includes a red, green, and blue micro-display device, the total number of micro-display devices in this application is less, resulting in lower power consumption. For example, the power consumption of the full-color augmented reality device can be reduced by about one-third, which allows for a longer battery life or the use of a smaller battery, making the full-color augmented reality device lighter and more suitable for wearing.

[0026] Furthermore, in one of the dual-color microdisplay devices, the first red light-emitting layer is located below the first green light-emitting layer. The emitted light from the first red light-emitting layer passes through the green light material. Since the band gap of green light is wider than that of red light (for example, the band gap of green light is 2.4 EV and the band gap of red light is 1.9 eV), the band gap of green light is larger than that of red light. Since the wide band gap material cannot be absorbed by the narrow band gap material, the red light penetrates the green light material without being absorbed. The red light has almost no loss, and the green light is emitted directly. Therefore, the above scheme can reduce the optical loss of the first optomechanical system. In another dual-color microdisplay device, the second red light-emitting layer is located below the second blue light-emitting layer. The emitted light from the second red light-emitting layer passes through the blue light material. Since the band gap of blue light is wider than that of red light (e.g., the band gap of blue light is 3.4 EV and the band gap of red light is 1.9 eV), the band gap of blue light is larger than that of red light. Since the wide band gap material cannot be absorbed by the low narrow band gap material, the red light penetrates the green light material without being absorbed. The red light has almost no loss, and the blue light is emitted directly. Therefore, the above scheme can reduce the optical loss of the second optomechanism.

[0027] As an optional implementation, in the embodiments of this application, the number of the first microdisplay devices is two, and the number of the second microdisplay devices is one;

[0028] Two first microdisplay devices are arranged along the first direction. The first optical engine further includes a first light combining device. The first light combining device is disposed on the light emission path of the two first microdisplay devices, and a first filter film is disposed on one surface of the first light combining device. The first filter film allows light emitted by one of the two first microdisplay devices to pass through and can reflect light emitted by the other of the two first microdisplay devices. The first light combining device is used to converge and combine the light emitted by the two first microdisplay devices.

[0029] Because the X-cube light-combining prism requires bonding four coated right-angle prisms together, the coating process is difficult, the manufacturing process is complex, and the bonding precision is stringent, resulting in high processing costs. This leads to a higher cost for full-color augmented reality devices.

[0030] In the above scheme, since there are two micro-display devices in the first optical engine instead of three, the first light combining device does not need to use an X-Cube light combining prism. Instead, a regular light combining prism (such as a tilted light combining sheet or two triangular prisms bonded together) can be used. A filter film can be deposited only on one surface of the first light combining device. This not only increases the design freedom of the first filter film, reduces the processing difficulty and cost of the first light combining device, thereby reducing the cost of the full-color augmented reality device, but also allows the first filter film to have a greater support rate for reflection and transmission angles. That is, the first filter film can allow light from more angles to pass through and allow light from more angles to be reflected. This allows most of the outgoing light from the micro-display device to be guided into the waveguide sheet, resulting in less light loss and reducing the light loss of the first optical engine.

[0031] As an optional implementation, in the embodiments of this application, the two first microdisplay devices are a green microdisplay device and a blue microdisplay device, and the second microdisplay device is a red microdisplay device.

[0032] In the above scheme, the red microdisplay device is independently located on one side of the device body, allowing it to be driven independently. This enables the red microdisplay device to obtain a larger driving current, increasing the brightness of the red light and thus improving the overall brightness of the full-color augmented reality device. Moreover, compared to a scheme where each side of the optical engine includes a red, green, and blue microdisplay device, the power consumption of the full-color augmented reality device can be reduced by about half. This allows for longer battery life or the use of smaller batteries, resulting in a lighter and more wearable full-color augmented reality device.

[0033] As an optional implementation, in the embodiments of this application, the two first microdisplay devices are a red microdisplay device and a green microdisplay device, respectively;

[0034] The second microdisplay device includes a second red light-emitting layer and a second blue light-emitting layer stacked together, with the second blue light-emitting layer located between the second red light-emitting layer and the waveguide sheet.

[0035] In the above scheme, both the first and second optical engines on both sides can provide red light, thereby compensating for the red light and increasing its brightness. This, in turn, can improve the overall brightness of the full-color augmented reality device and ensure the brightness of the full-color image.

[0036] Furthermore, since the second red light-emitting layer is located below the second blue light-emitting layer in the second micro-display device, the emitted light from the second red light-emitting layer passes through the blue light material. Because the band gap of blue light is wider than that of red light (e.g., the band gap of blue light is 3.4 EV and the band gap of red light is 1.9 eV), the band gap of blue light is larger than that of red light. Since the wide band gap material cannot be absorbed by the low and narrow band gap material, the red light penetrates the green light material without being absorbed, and the red light has almost no loss. The blue light is emitted directly. Therefore, the above scheme can reduce the optical loss of the second optomechanical system.

[0037] As an optional implementation, in the embodiments of this application, there are two of both the first microdisplay device and the second microdisplay device;

[0038] Two first microdisplay devices are arranged along the first direction. The first optical engine further includes a first light combining device. The first light combining device is disposed on the light emission path of the two first microdisplay devices, and a first filter film is disposed on one surface of the first light combining device. The first filter film allows light emitted from one of the two first microdisplay devices to pass through and can reflect light emitted from the other of the two first microdisplay devices. The first light combining device is used to converge and combine the light emitted from the two first microdisplay devices.

[0039] Two second microdisplay devices are arranged along the first direction. The second optical engine also includes a second light combining device. The second light combining device is disposed on the light emission path of the two second microdisplay devices, and a second filter film is disposed on one surface of the second light combining device. The second filter film allows light emitted from one of the two second microdisplay devices to pass through and can reflect light emitted from the other of the two second microdisplay devices. The second light combining device is used to converge and combine the light emitted from the two second microdisplay devices.

[0040] With this configuration, since both the first and second optical engines contain two micro-display devices instead of three, neither the first nor the second light-combining device needs to use an X-Cube light-combining prism. Instead, ordinary light-combining prisms (such as a tilted light-combining sheet or two prisms bonded together) can be used. A filter film can be deposited on only one surface of either the first or second light-combining device. This not only increases the design freedom of both the first and second filter films, reducing their manufacturing difficulty and cost, thus lowering the cost of full-color augmented reality devices, but also allows for greater support of reflection and transmission angles. This means both the first and second filter films can allow light to pass through at more angles and be reflected at more angles, allowing most of the emitted light from the micro-display devices to be guided into the waveguide, resulting in less light loss and reducing the light loss of both the first and second optical engines.

[0041] As an optional implementation, in the embodiments of this application, the two first microdisplay devices are respectively a red microdisplay device and a green microdisplay device, and the two second microdisplay devices are respectively a red microdisplay device and a blue microdisplay device; or,

[0042] Both of the first microdisplay devices are red microdisplay devices, and the two second microdisplay devices are green microdisplay devices and blue microdisplay devices, respectively.

[0043] In both of the above schemes, there are two red microdisplay devices, and one green and one blue microdisplay device. The number of red microdisplay devices is greater than that of green and blue microdisplay devices, which can be regarded as adding one red microdisplay device. This can compensate for red light, improve the brightness of red light, and thus improve the overall brightness of the full-color augmented reality device, ensuring the brightness of the full-color image.

[0044] As an optional implementation, in the embodiments of this application, the first microdisplay device is a dual-color microdisplay device, which includes two stacked first light-emitting layers with different light-emitting colors, and the two first light-emitting layers are driven simultaneously. By driving the two first light-emitting layers with different light-emitting colors of the first microdisplay device simultaneously, and in conjunction with the second microdisplay device, a complete full-color image can be generated at the same time, forming a color-stable image, reducing the probability of rainbow-like ghosting or color spots appearing at the image edges, thereby improving the user's visual comfort.

[0045] And / or, the second microdisplay device is a dual-color microdisplay device, comprising two stacked second light-emitting layers with different emitting colors, both of which are driven simultaneously. By driving the two second light-emitting layers with different emitting colors simultaneously in conjunction with the first microdisplay device, a complete full-color image can be generated at the same time, forming a color-stable image and reducing the probability of rainbow-like ghosting or color spots appearing at the image edges, thereby improving the user's visual comfort. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a schematic diagram of the structure of a full-color Micro-LED AR device in related technologies;

[0048] Figure 2 This is a schematic diagram of the first structure of the full-color augmented reality device disclosed in the embodiments of this application;

[0049] Figure 3 This is a second structural schematic diagram of the full-color augmented reality device disclosed in the embodiments of this application;

[0050] Figure 4 This is a schematic diagram of the structure of the first optical engine, the second optical engine, and the waveguide sheet disclosed in the embodiments of this application. Figure 1 ;

[0051] Figure 5 This is a schematic diagram of the structure of the first optical engine, the second optical engine, and the waveguide sheet disclosed in the embodiments of this application. Figure 2 ;

[0052] Figure 6 This is a schematic diagram of the structure of the first optical engine, the second optical engine, and the waveguide sheet disclosed in the embodiments of this application. Figure 3 ;

[0053] Figure 7 This is a schematic diagram of the structure of the first optical engine, the second optical engine, and the waveguide sheet disclosed in the embodiments of this application. Figure 4 ;

[0054] Figure 8 This is a schematic diagram of the structure of the first optical engine, the second optical engine, and the waveguide sheet disclosed in the embodiments of this application. Figure 5 ;

[0055] Figure 9This is a schematic diagram of the structure of the first optical engine, the second optical engine, and the waveguide sheet disclosed in the embodiments of this application. Figure 6 ;

[0056] Figure 10 This is a schematic diagram of the structure of the first optical engine, the second optical engine, and the waveguide sheet disclosed in the embodiments of this application. Figure 7 ;

[0057] Figure 11 This is a schematic diagram of the structure of the first optical engine, the second optical engine, and the waveguide sheet disclosed in the embodiments of this application. Figure 8 ;

[0058] Figure 12 This is a schematic diagram of the structure of the first optical engine, the second optical engine, and the waveguide sheet disclosed in the embodiments of this application. Figure 9 ;

[0059] Figure 13 This is a schematic diagram of the structure of the first optical engine, the second optical engine, and the waveguide sheet disclosed in the embodiments of this application. Figure 10 ;

[0060] Figure 14 This is a schematic diagram of the structure of the first optical engine, the second optical engine, and the waveguide sheet disclosed in the embodiments of this application. Figure 10 one;

[0061] Figure 15 This is a schematic diagram of the structure of the first optical engine, the second optical engine, and the waveguide sheet disclosed in the embodiments of this application. Figure 10 two;

[0062] Figure 16 This is a schematic diagram of the structure of the first optical engine, the second optical engine, and the waveguide sheet disclosed in the embodiments of this application. Figure 10 three;

[0063] Figure 17 This is a schematic diagram of the structure of the first optical engine, the second optical engine, and the waveguide sheet disclosed in the embodiments of this application. Figure 10 Four;

[0064] Figure 18 This is a schematic diagram of the structure of the first optical engine, the second optical engine, and the waveguide sheet disclosed in the embodiments of this application. Figure 10 five;

[0065] Figure 19 This is a schematic diagram of the structure of the first optical engine, the second optical engine, and the waveguide sheet disclosed in the embodiments of this application. Figure 10 six;

[0066] Figure 20 This is a schematic diagram of the structure of the first optical engine disclosed in the embodiments of this application;

[0067] Figure 21 This is a schematic diagram of the structure of the second optical engine disclosed in the embodiments of this application.

[0068] Explanation of main figure symbols

[0069] 1a - Red Micro-LED display chip; 1b - Blue Micro-LED micro-display chip; 1c - Green Micro-LED display chip; 1d - X-Cube light-combining prism; 1e - Waveguide element;

[0070] 100 - Full-color augmented reality device; 11 - Device body; 11a - Main body; 11b - Wearable part; 11c - Frame; 11d - First temple; 11e - Second temple; 111 - First side; 112 - Second side; 12 - First optical engine; 121 - First microdisplay device; 121a - First red light-emitting layer; 121b - First green light-emitting layer; 122 - First light-combining device; 1221 - First filter film; 1222 - ... 13-Second optical engine; 131-Second microdisplay device; 131a-Second red emitting layer; 131b-Second blue emitting layer; 132-Second light combining device; 1321-Second filter film; 1322-Second light combining prism; 14-Waveguide plate; 141-First entrance pupil region; 142-First exit pupil region; 143-Second entrance pupil region; 144-Second exit pupil region; 15-First projection lens; 16-Second projection lens. Detailed Implementation

[0071] To make the objectives, technical solutions, and advantages of this application clearer, the exemplary embodiments of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments. Obviously, the described exemplary embodiments are only some embodiments of this application, and not all embodiments. That is, the specific embodiments described herein are merely used to explain this application and are not intended to limit this application.

[0072] It should be noted that the brief descriptions of terminology used in this application are merely for the purpose of facilitating understanding of the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to limit this application.

[0073] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "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 application 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, they should not be construed as limitations on this application.

[0074] The terms "first," "second," etc., used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this application, a first optical engine may be referred to as a second optical engine, and similarly, a second optical engine may be referred to as a first optical engine. Both the first and second optical engines are optical engines, but they are not the same optical engine.

[0075] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0076] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0077] In the description of this application, it should be noted that the singular forms of "a," "an," and "the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that terms such as "comprising / including" or "having" specify the presence of the stated features, integrals, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, integrals, steps, operations, components, parts, or combinations thereof.

[0078] In addition, the term "and / or" as used in this specification includes any and all combinations of the related listed items. For example, A and / or B can mean: A alone, A and B together, or B alone. That is, the term "and / or" as used in this specification includes any and all combinations of the related listed items.

[0079] Augmented Reality (AR) and Virtual Reality (VR) are technologies that have garnered significant attention in recent years. Their near-eye display systems both use pixels on the display device to form a distant virtual image through a series of optical imaging elements, which is then projected onto the viewer's eye. The difference lies in the fact that AR devices require see-through; they need to see both the real external world and the virtual information. Therefore, the imaging system cannot obstruct the viewer's line of sight. This necessitates the addition of one or more optical combiners, layering them to integrate the virtual information and the real scene, allowing them to complement and enhance each other.

[0080] The optical display system of AR devices typically consists of microdisplay devices and optical components, with microdisplay devices often employing Micro-LEDs. In AR devices, to ensure lossless and leak-free light transmission, waveguides are solely responsible for image transmission—essentially "parallel light in, parallel light out"—so waveguide components are frequently used as optical elements. Furthermore, utilizing waveguides allows the display and imaging system to be moved away from the glasses, to the top of the forehead or the side. This significantly reduces the optical system's obstruction of the external view and makes the weight distribution more ergonomic, thus improving the wearing experience of AR devices.

[0081] For AR devices, in addition to display quality, size and weight are particularly important metrics.

[0082] The structure of full-color Micro-LED AR devices in related technologies, such as Figure 1 As shown, a red Micro-LED display chip 1a, a blue Micro-LED micro-display chip 1b, and a green Micro-LED display chip 1c are used as the light source for a single full-color Micro-LED optical engine. Therefore, an X-Cube combining prism 1d is required to combine the three colors of light into a beam, which then exits through the waveguide element 1e and reaches the human eye. Due to the presence of the X-Cube combining prism 1d, this full-color optical display system is relatively large, resulting in thicker temples for mounting the optical display system in full-color Micro-LED AR devices. Furthermore, the X-Cube combining prism 1d is difficult to manufacture, leading to low yield and high cost.

[0083] Furthermore, taking a 0.12-inch Micro-LED microdisplay chip as an example, the power consumption of a single full-color Micro-LED optical engine is approximately 200-300 milliwatts at an APL of 10%. Therefore, the combined power consumption of the left and right full-color Micro-LED optical engines is close to 500 milliwatts, which is relatively high. Thus, to ensure long battery life for full-color Micro-LED AR devices, a larger capacity battery is required, which further increases the bulkiness of the temples.

[0084] APL (Average Picture Level) is the ratio of the number of lit pixels to the total number of pixels in an image. Since different images display different content, the number of lit pixels varies, resulting in different APL percentages. Therefore, the APL percentage can characterize the display characteristics of an image.

[0085] In addition to the problems of large size, heavy weight and high power consumption, the full-color Micro-LED AR device in the related technology also has the problem that the brightness of the red Micro-LED micro-display chip is relatively low among the red, green and blue Micro-LED micro-display chips, which limits the brightness of the full-color combined light and affects the brightness of the full-color Micro-LED AR device.

[0086] For example, under normal circumstances, at 70A / cm 2 At a given driving current density, the brightness of red light can reach 200,000 nits, green light can reach 3.5 million nits, and blue light can reach 300,000 nits. Although the brightness of red and blue light is relatively low, in full-color combined light, the brightness ratio of red, green, and blue light is usually 2:7:1 or 3:6:1. Taking a brightness ratio of 2:7:1 as an example, when the brightness of full-color combined light is 1 million nits, the brightness of red light is 200,000 nits, the brightness of green light is 700,000 nits, and the brightness of blue light is 100,000 nits. The demand for blue light is relatively low, while the demand for red light is higher.

[0087] It is evident that the low-brightness red Micro-LED microdisplay chip cannot meet the red light requirements in full-color light combining, resulting in low brightness of full-color light combining and affecting the brightness of full-color Micro-LED AR devices.

[0088] In view of this, the present application provides a full-color augmented reality device that can reduce the overall size and weight of the full-color augmented reality device while achieving full-color display effect, thereby improving the wearing comfort of the full-color augmented reality device.

[0089] The technical solutions of some embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0090] Please see Figure 2 The Augmented Reality (AR) device provided in this application embodiment is a display device that can be worn on a user's head to provide an immersive experience. The AR device can acquire real-time images of real scenes and fuse virtual object images into the real scene images to form an augmented reality effect.

[0091] In this application, AR devices include, but are not limited to, AR glasses, AR headsets, and wearable AR game consoles.

[0092] In some embodiments, the full-color augmented reality device 100 may include a device body 11, which is mainly used to fix and protect electronic devices or structures disposed on the device body 11, and is mainly used to wear and fix the full-color augmented reality device 100 on the user's head.

[0093] The device body 11 has a first side 111 and a second side 112 facing each other in a first direction. When the full-color augmented reality device 100 is worn on the user's head, the first direction is left-right.

[0094] An example, such as Figure 2 As shown, the main body 11 of the device may include a main body portion 11a and a wearable portion 11b, wherein the first side portion 111 and the second side portion 112 are respectively the two sides of the main body portion 11a in a first direction, and the two ends of the wearable portion 11b are respectively connected to the first side portion 111 and the second side portion 112.

[0095] Another example, such as Figure 3 As shown, the main body 11 of the device may include a frame 11c, a first temple 11d and a second temple 11e, wherein the first side 111 and the second side 112 are respectively the two sides of the frame 11c in a first direction, the first temple 11d is rotatably connected to the first side 111 of the frame 11c, and the second temple 11e is rotatably connected to the second side 112 of the frame 11c.

[0096] In some embodiments, such as Figure 3 and Figure 4As shown, the full-color augmented reality device 100 includes a first optical engine 12, a second optical engine 13, and a waveguide 14. The first optical engine 12 is disposed on a first side 111, the second optical engine 13 is disposed on a second side 112, and the waveguide 14 is disposed on the device body 11. The waveguide 14 has a first entrance pupil area 141, a first exit pupil area 142, a second entrance pupil area 143, and a second exit pupil area 144. Light emitted from the first optical engine 12 enters the waveguide 14 through the first entrance pupil area 141 and exits from the first exit pupil area 142 to the human eye. Light emitted from the second optical engine 13 enters the waveguide 14 through the second entrance pupil area 143 and exits from the second exit pupil area 144 to the human eye.

[0097] That is, the light beam emitted by the first optical engine 12 can enter the waveguide plate 14 through the first entrance pupil region 141, undergo total internal reflection within the waveguide plate 14, and then exit the waveguide plate 14 through the first exit pupil region 142 before finally entering the human eye. The light beam emitted by the second optical engine 13 can enter the waveguide plate 14 through the second entrance pupil region 143, undergo total internal reflection within the waveguide plate 14, and then exit the waveguide plate 14 through the second exit pupil region 144 before finally entering the human eye, thereby allowing the user to observe the images emitted by the first optical engine 12 and the second optical engine 13.

[0098] In some embodiments, such as Figure 4 As shown, the waveguide sheet 14 can be a single piece, and the first entrance pupil region 141, the first exit pupil region 142, the second exit pupil region 144, and the second entrance pupil region 143 are arranged sequentially along the first direction; in other embodiments, such as Figure 5 As shown, there may be two waveguide plates 14, which are arranged sequentially along the first direction. The first entrance pupil region 141 and the first exit pupil region 142 are formed on one of the waveguide plates 14, and the second entrance pupil region 143 and the second exit pupil region 144 are formed on the other waveguide plate 14. The first entrance pupil region 141, the first exit pupil region 142, the second exit pupil region 144 and the second entrance pupil region 143 are arranged sequentially along the first direction.

[0099] In some embodiments, the first optical engine 12 includes one or two first microdisplay devices 121, and the second optical engine 13 includes one or two second microdisplay devices 131. The light emitted by the first microdisplay device 121 and the second microdisplay device 131 includes red light, green light and blue light, so that the light emitted by the first microdisplay device 121 and the second microdisplay device 131 can be combined into a full-color image in the human eye.

[0100] Since the first optical engine 12 includes one or two first micro-display devices 121, and the second optical engine 13 includes one or two second micro-display devices 131, the total number of micro-display devices in the two optical engines (i.e., the first optical engine 12 and the second optical engine 13) can be controlled to be two, three, or four. The light emitted by the first micro-display device 121 and the second micro-display device includes red light, green light, and blue light, so that the micro-display devices of the two optical engines can provide the human eye with light of the three basic colors of red, green, and blue. This allows the light output from the two optical engines to overlap into a full-color image in the human eye, achieving the effect of full-color display. Compared to a design where each optical engine includes red, green, and blue microdisplay devices, resulting in a total of six microdisplay devices on both sides, the number of microdisplay devices on each side of the optical engine in this application is reduced. This not only reduces the size, weight, and cost of the full-color augmented reality device 100, but also lowers its power consumption. Consequently, the full-color augmented reality device 100 can have a longer battery life or a smaller battery, making it lighter, more wearable, and more in line with human wearing habits, thus improving its wearing comfort.

[0101] As can be seen, by adopting the technical solution of this application, a full-color image can be formed in the human eye, while the number of micro-display devices in each optical engine is reduced, thereby reducing the overall size and weight of the full-color augmented reality device 100 and improving the wearing comfort of the full-color augmented reality device 100.

[0102] In some embodiments, the full-color augmented reality device 100 may further include a first projection lens 15 and a second projection lens 16, wherein the first projection lens 15 is disposed between the first optical engine 12 and the waveguide plate 14, and the second projection lens 16 is disposed between the second optical engine 13 and the waveguide plate 14.

[0103] It should be noted that, Figure 4 The accompanying drawings below only schematically illustrate some components included in the full-color augmented reality device 100; the actual shape, size, position, and construction of these components are not affected by the actual shape, size, position, or construction of the device. Figure 4 As well as the limitations of the accompanying figures below.

[0104] Understandably, for a full-color augmented reality device 100, since the field of view of a single eye is very large, the displayed image only covers a portion of that field of view. If the image pixels output by the first optical engine 12 and the second optical engine 13 are not aligned, the image seen by the left eye may appear on the left and the image seen by the right eye on the right. The human brain cannot recognize the images seen by both eyes as the same image, resulting in cognitive confusion. By aligning the image pixels output by the first optical engine 12 and the second optical engine 13 one-to-one, it is ensured that they overlap into a single image in the human eye.

[0105] Furthermore, it is understandable that a frame is the basic unit of an image display. As mentioned above, in this application, the patterns displayed by the first optical engine 12 and the second optical engine 13 need to be combined to achieve full-color display. Therefore, it is necessary to display one frame of the pattern displayed by the first optical engine 12 and the second optical engine 13 simultaneously to ensure that the binocular vision is fused into a full-color image. To this end, this application can synchronize the frame signals of the first optical engine 12 and the second optical engine 13 through a timing controller (TCON) to ensure that the binocular vision is fused into a full-color image, which the human eye can observe.

[0106] In this application, both the first microdisplay device 121 and the second microdisplay device 131 can be Micro-LED microdisplay chips.

[0107] As can be seen from the foregoing, the sum of the number of the first microdisplay device 121 and the second microdisplay device 131 is two, three, or four.

[0108] like Figures 4 to 7 As shown, when the total number of the first microdisplay device 121 and the second microdisplay device 131 is two, that is, when there is only one of each of the first microdisplay device 121 and the second microdisplay device 131, at least one of the first microdisplay device 121 and the second microdisplay device 131 is a dual-color microdisplay device. This ensures that the light emitted by the first microdisplay device 121 and the second microdisplay device 131 includes red light, green light, and blue light, achieving a full-color display effect.

[0109] In the above scheme, since both the first optical engine 12 and the second optical engine 13 adopt a micro-display device, an X-cube combining prism is not required. This reduces the size and weight of the first and second optical engines 12 and 13, further reducing the size and weight of the full-color augmented reality device 100. This makes the full-color augmented reality device 100 more wearable and improves its wearing comfort. Moreover, since an X-cube combining prism is not needed, the cost of the full-color augmented reality device 100 can also be lower.

[0110] Furthermore, in the X-cube combining prism solution, because the microdisplay device has a certain emission angle and the reflective film of the X-cube combining prism has a certain angle selectivity, in actual use, the light emitted by the microdisplay device will experience some light loss when passing through the X-cube combining prism, thus losing some light. The above solution eliminates the need for an X-cube combining prism, which can reduce the light loss of the optical engines on both sides.

[0111] The X-cube combining prism is formed by cementing together four coated right-angle prisms. "eV" stands for electron volt.

[0112] As an optional implementation method, such as Figures 4 to 6 As shown, one of the first microdisplay device 121 and the second microdisplay device 131 is a dual-color microdisplay device, and the other of the first microdisplay device 121 and the second microdisplay device 131 is a monochrome microdisplay device; that is, when the first microdisplay device 121 is a dual-color microdisplay device, the second microdisplay device 131 is a monochrome microdisplay device, and when the first microdisplay device 121 is a monochrome microdisplay device, the second microdisplay device 131 is a dual-color microdisplay device.

[0113] Among them, the aforementioned dual-color micro-display device can be a red-green micro-display device, in which case the aforementioned monochrome micro-display device is a blue micro-display device; or, the aforementioned dual-color micro-display device can also be a red-blue micro-display device, in which case the aforementioned monochrome micro-display device is a green micro-display device; or, the aforementioned dual-color micro-display device can also be a green-blue micro-display device, in which case the aforementioned monochrome micro-display device is a red micro-display device.

[0114] Preferably, such as Figures 4 to 6 As shown, the dual-color micro-display device is a green-blue dual-color micro-display device, that is, the dual-color micro-display device includes a stacked green light-emitting layer and a blue light-emitting layer, with the blue light-emitting layer located between the green light-emitting layer and the waveguide sheet. The monochrome micro-display device is a red micro-display device. Then, the green-blue image seen by one eye and the red image seen by the other eye are combined into a full-color image to achieve the effect of full-color display.

[0115] In the above scheme, the red microdisplay device is independently located on one side of the device body, allowing it to be driven independently. This enables the red microdisplay device to obtain a larger driving current, increasing the brightness of the red light and thus improving the overall brightness of the full-color augmented reality device 100. Moreover, compared to the method where each side of the optical engine includes a red, green, and blue microdisplay device, the total number of microdisplay devices in this application is less, resulting in lower power consumption. For example, the power consumption of the full-color augmented reality device 100 can be reduced by about half, which allows for a longer battery life or the use of a smaller battery, making the full-color augmented reality device 100 lighter and more suitable for wearing.

[0116] Furthermore, in dual-color microdisplay devices, the green light-emitting layer is located below the blue light-emitting layer. The light emitted from the green light-emitting layer passes through the blue light-emitting material. Since the band gap of blue light is wider than that of green light (e.g., the band gap of blue light is 3.4 eV and that of green light is 2.4 eV), and the band gap of blue light is larger than that of green light, the wide band gap material cannot be absorbed by the narrow band gap material. Therefore, the green light penetrates the blue light-emitting material without being absorbed, and the green light is basically without loss. The blue light is emitted directly. Thus, the above scheme can reduce the optical loss of the two optical engines.

[0117] As another alternative implementation method, such as Figure 7 As shown, both the first microdisplay device 121 and the second microdisplay device 131 are dual-color microdisplay devices. For example, the first microdisplay device 121 can be a red-green microdisplay device, in which case the second microdisplay device 131 can be a red-blue microdisplay device or a green-blue microdisplay device; or, for another example, the first microdisplay device 121 can be a red-blue microdisplay device, in which case the second microdisplay device 131 can be a red-green microdisplay device or a green-blue microdisplay device; or, for yet another example, the first microdisplay device 121 can be a green-blue microdisplay device, in which case the second microdisplay device 131 can be a red-blue microdisplay device or a red-green microdisplay device.

[0118] Preferably, the first microdisplay device 121 is a red-green microdisplay device, and the second microdisplay device 131 is a red-blue microdisplay device. That is, the first microdisplay device 121 includes a first red light-emitting layer 121a and a first green light-emitting layer 121b stacked together, with the first green light-emitting layer 121b located between the first red light-emitting layer 121a and the waveguide sheet 14; the second microdisplay device 131 includes a second red light-emitting layer 131a and a second blue light-emitting layer 131b stacked together, with the second blue light-emitting layer 131b located between the second red light-emitting layer 131a and the waveguide sheet 14.

[0119] In the above scheme, both the first microdisplay device 121 and the second microdisplay device 131 can provide red light, thereby compensating for the red light and increasing its brightness. This, in turn, can improve the overall brightness of the full-color augmented reality device 100 and ensure the brightness of the full-color image. Moreover, compared to the method where each optical engine includes a red microdisplay device, a green microdisplay device, and a blue microdisplay device, the total number of microdisplay devices in this application is less, resulting in lower power consumption. For example, the power consumption of the full-color augmented reality device 100 can be reduced by about one-third, thereby enabling the full-color augmented reality device 100 to have a longer battery life or to use a smaller battery, which in turn makes the full-color augmented reality device 100 lighter and more suitable for wearing.

[0120] Furthermore, since the first red light-emitting layer 121a is located below the first green light-emitting layer 121b in the first micro-display device 121, the emitted light from the first red light-emitting layer 121a passes through the green light material. Because the band gap of green light is wider and the band gap of red light is narrower (for example, the band gap of green light is 2.4 EV and the band gap of red light is 1.9 eV), the band gap of green light is larger than that of red light. Since the wide band gap material cannot be absorbed by the narrow band gap material, the red light penetrates the green light material without being absorbed. The red light has almost no loss, and the green light is emitted directly. Therefore, the above scheme can reduce the light loss of the first optomechanical device 12. In the second microdisplay device 131, the second red light-emitting layer 131a is located below the second blue light-emitting layer 131b. The emitted light from the second red light-emitting layer 131a passes through the blue light material. Since the band gap of blue light is wider and the band gap of red light is narrower (for example, the band gap of blue light is 3.4 EV and the band gap of red light is 1.9 eV), the band gap of blue light is larger than that of red light. Since the wide band gap material cannot be absorbed by the low narrow band gap material, the red light penetrates the green light material without being absorbed. The red light has almost no loss, and the blue light is emitted directly. Therefore, the above scheme can reduce the light loss of the second optomechanical device 13.

[0121] like Figures 8 to 13 As shown, when the total number of the first microdisplay device 121 and the second microdisplay device 131 is three, it can be two first microdisplay devices 121 and one second microdisplay device 131, or one first microdisplay device 121 and two second microdisplay devices 131. The following uses two first microdisplay devices 121 and one second microdisplay device 131 as an example to further illustrate the technical solution of this application.

[0122] In some embodiments, such as Figures 10 to 13As shown, two first microdisplay devices 121 are arranged along a first direction. The first optomechanical system 12 also includes a first light combining device 122. The first light combining device 122 is disposed on the light output path of the two first microdisplay devices 121, and a first filter film 1221 is disposed on one surface of the first light combining device 122. The first filter film 1221 allows light emitted from one of the two first microdisplay devices 121 to pass through and can reflect light emitted from the other of the two first microdisplay devices 121. The first light combining device 122 is used to converge and combine the light emitted from the two first microdisplay devices 121.

[0123] Because the X-cube light-combining prism requires bonding four coated right-angle prisms together, the coating process is difficult, the manufacturing process is complex, and the bonding precision is stringent, resulting in high processing costs. This leads to a higher cost for full-color augmented reality devices.

[0124] In the above scheme, since there are two, instead of three, first micro-display devices 121 in the first optomechanism 12, the first light combining device 122 does not need to use an X-Cube light combining prism. Instead, a regular light combining prism (such as a tilted light combining sheet or two prisms bonded together) can be used. A filter film can be deposited only on one surface of the first light combining device 122. This not only increases the design freedom of the first filter film 1221, reduces the processing difficulty of the first light combining device 122, and reduces the processing cost of the first light combining device 122, thereby reducing the cost of the full-color augmented reality device 100, but also allows the first filter film 1221 to have a larger reflection and transmission angle support rate. That is, the first filter film 1221 can allow light from more angles to pass through and allow light from more angles to be reflected by it. This allows most of the outgoing light from the micro-display device to be guided into the waveguide sheet, resulting in less light loss and reducing the light loss of the first optomechanism 12.

[0125] The first example is, such as Figure 10 , Figure 11 and Figure 12 As shown, the two first microdisplay devices 121 can be green microdisplay devices and blue microdisplay devices, respectively, and the second microdisplay device 131 is a red microdisplay device.

[0126] In a second exemplary embodiment, the two first microdisplay devices 121 may be a red microdisplay device and a green microdisplay device, respectively, and the second microdisplay device 131 may be a blue microdisplay device.

[0127] In a third exemplary embodiment, the two first microdisplay devices 121 may be a red microdisplay device and a blue microdisplay device, respectively, and the second microdisplay device 131 may be a green microdisplay device.

[0128] The fourth example is, for instance... Figure 13As shown, the two first microdisplay devices 121 can be a red microdisplay device and a green microdisplay device, respectively, and the second microdisplay device can be a red-blue microdisplay device.

[0129] In a fifth exemplary embodiment, the two first microdisplay devices 121 may be a red microdisplay device and a green microdisplay device, respectively, and the second microdisplay device may be a blue-green microdisplay device.

[0130] In a sixth exemplary embodiment, the two first microdisplay devices 121 may be a green microdisplay device and a blue microdisplay device, respectively, and the second microdisplay device may be a red-blue microdisplay device.

[0131] When the two first microdisplay devices 121 are a green microdisplay device and a blue microdisplay device respectively, and the second microdisplay device 131 is a red microdisplay device, such as Figure 10 , Figure 11 and Figure 12 As shown, the red microdisplay device can be independently mounted on one side of the device body, allowing it to be driven independently. This enables the red microdisplay device to obtain a larger driving current, increasing the brightness of the red light and thus improving the overall brightness of the full-color augmented reality device 100. Moreover, compared to a design where each side of the optical engine includes a red microdisplay device, a green microdisplay device, and a blue microdisplay device, the power consumption of the full-color augmented reality device 100 can be reduced by about half. This allows for a longer battery life or the use of a smaller battery, resulting in a lighter weight and greater wearability.

[0132] When the two first microdisplay devices 121 are a red microdisplay device and a green microdisplay device respectively, and the second microdisplay device 131 is a red-blue microdisplay device, such as Figure 13 As shown, the second microdisplay device 131 includes a second red light-emitting layer 131a and a second blue light-emitting layer 131b stacked together, with the second blue light-emitting layer 131b located between the second red light-emitting layer 131a and the waveguide sheet 14. This arrangement allows both the first and second optical engines on both sides to provide red light, thereby compensating for the red light, increasing its brightness, and consequently improving the overall brightness of the full-color augmented reality device 100, ensuring the brightness of the full-color image.

[0133] Furthermore, since the second red light-emitting layer 131a is located below the second blue light-emitting layer 131b in the second micro-display device 131, the emitted light from the second red light-emitting layer 131a passes through the blue light material. Because the band gap of blue light is wider than that of red light (for example, the band gap of blue light is 3.4 EV and the band gap of red light is 1.9 eV), the band gap of blue light is larger than that of red light. Since the wide band gap material cannot be absorbed by the low and narrow band gap material, the red light penetrates the green light material without being absorbed, and the red light has almost no loss. The blue light is emitted directly. Therefore, the above scheme can reduce the light loss of the second optomechanical device 13.

[0134] When the sum of the number of the first microdisplay device 121 and the second microdisplay device 131 is four, such as Figures 14 to 19 As shown, there are two of each of the first microdisplay device 121 and the second microdisplay device 131.

[0135] In some embodiments, two first microdisplay devices 121 are arranged along a first direction. The first optomechanical system 12 further includes a first light combining device 122. The first light combining device 122 is disposed on the light emission path of the two first microdisplay devices 121, and a first filter film 1221 is disposed on one surface of the first light combining device 122. The first filter film 1221 allows light emitted from one of the two first microdisplay devices 121 to pass through and can reflect light emitted from the other of the two first microdisplay devices 121. The first light combining device 122 is used to converge and combine the light emitted from the two first microdisplay devices 121.

[0136] With this configuration, since the first micro-display devices 121 of the first optical engine 12 are two instead of three, the first light combining device 122 does not need to use an X-Cube light combining prism. Instead, it can use a regular light combining prism (such as a tilted light combining sheet or two triangular prisms bonded together). A filter film can be deposited on only one surface of the first light combining device 122. This not only increases the design freedom of the first filter film 1221, reducing the processing difficulty and cost of the first light combining device 122, thus reducing the cost of the full-color augmented reality device 100, but also allows the first filter film 1221 to have a greater support rate for reflection and transmission angles. That is, the first filter film 1221 can allow light from more angles to pass through and be reflected from more angles, so that most of the emitted light from the first micro-display device 121 can be guided into the waveguide, resulting in less light loss and reducing the light loss of the first optical engine 12.

[0137] In some embodiments, two second microdisplay devices 131 are arranged along a first direction. The second optomechanism 13 further includes a second light combining device 132. The second light combining device 132 is disposed on the light emission path of the two second microdisplay devices 131, and a second filter film 1321 is disposed on one surface of the second light combining device 132. The second filter film 1321 allows light emitted from one of the two second microdisplay devices 131 to pass through and can reflect light emitted from the other of the two second microdisplay devices 131. The second light combining device 132 is used to converge and combine the light emitted from the two second microdisplay devices 131.

[0138] With this configuration, since there are two, instead of three, second micro-display devices 131 in the second optomechanism 13, the second light combining device 132 does not need to use an X-Cube light combining prism. Instead, a regular light combining prism (such as a tilted light combining sheet or two prisms bonded together) can be used. A filter film can be deposited on only one surface of the second light combining device 132. This not only increases the design freedom of the second filter film 1321, reduces the processing difficulty and cost of the second light combining device 132, thereby reducing the cost of the full-color augmented reality device 100, but also allows the second filter film 1321 to have a greater support rate for reflection and transmission angles. That is, the second filter film 1321 can allow light from more angles to pass through and allow light from more angles to be reflected. This allows most of the outgoing light from the second micro-display device 131 to be guided into the waveguide, resulting in less light loss and reducing the light loss of the second optomechanism 13.

[0139] As an optional implementation method, such as Figure 14 and Figure 15 As shown, the two first microdisplay devices 121 are a red microdisplay device and a green microdisplay device, respectively, and the two second microdisplay devices 131 are a red microdisplay device and a blue microdisplay device, respectively.

[0140] With this setup, there can be two red microdisplay devices, while there is only one green and one blue microdisplay device. The number of red microdisplay devices is greater than that of green and blue microdisplay devices, which can be considered as adding one red microdisplay device. This allows for red light compensation, increasing the brightness of red light and thus improving the overall brightness of the full-color augmented reality device, ensuring the brightness of the full-color image.

[0141] As another alternative implementation method, such as Figure 16 As shown, both first microdisplay devices are red microdisplay devices, and the two second microdisplay devices are green microdisplay devices and blue microdisplay devices, respectively.

[0142] With this setup, there can be two red microdisplay devices, while there is only one green and one blue microdisplay device. The number of red microdisplay devices is greater than that of green and blue microdisplay devices, which can be considered as adding one red microdisplay device. This allows for red light compensation, increasing the brightness of red light and thus improving the overall brightness of the full-color augmented reality device, ensuring the brightness of the full-color image.

[0143] As can be seen from the foregoing, in some embodiments, the first microdisplay device 121 may be a dual-color microdisplay device.

[0144] When the first microdisplay device 121 is a dual-color microdisplay device, it includes two stacked first light-emitting layers with different emitting colors. For example, one first light-emitting layer may be a red light-emitting layer for emitting red light, and the other may be a green light-emitting layer for emitting green light; or, for example, one first light-emitting layer may be a red light-emitting layer for emitting red light, and the other may be a blue light-emitting layer for emitting blue light, and so on. The two first light-emitting layers are typically driven by the same driver board, and they can be driven simultaneously or in a time-division manner.

[0145] Simultaneous driving refers to the fact that the two colors of the first microdisplay device 121 can be displayed simultaneously in a certain frame of the first optical engine 12, that is, the two colors corresponding to the two first light-emitting layers can be displayed simultaneously in a certain frame of the first optical engine 12. Time-division driving refers to the fact that a frame of the first optical engine 12 is divided into two moments. In the first moment, one color of the first microdisplay device 121 is displayed, and in the second moment, the other color of the first microdisplay device 121 is displayed. That is, in the first moment, the color corresponding to one of the first light-emitting layers is displayed, and in the second moment, the color corresponding to the other first light-emitting layer is displayed.

[0146] Although time-division driving causes the two colors of the first microdisplay device 121 to be displayed at different times, the time interval between the two times of time-division display is very short. Utilizing the principle of visual persistence (visual persistence effect), the human eye can perceive both colors. Combined with the second microdisplay device 131, the human eye can observe a full-color image. In certain specific scenarios, the two first light-emitting layers of the first microdisplay device 121 are driven in a time-division manner, allowing a single first light-emitting layer to obtain a larger driving current and achieve higher brightness.

[0147] It is understandable that when the first microdisplay device 121 includes two stacked first light-emitting layers with different light-emitting colors, the two first light-emitting layers are driven in a time-division manner, and the second microdisplay device 131 is a single device, while one of the first light-emitting layers outputs an image pixel, the second microdisplay device 131 will synchronously output the corresponding image pixel for matching; and while the other first light-emitting layer outputs an image pixel, the second microdisplay device 131 will also synchronously output the corresponding image pixel for matching.

[0148] In this application, it is preferred that the two first light-emitting layers of the first microdisplay device 121 with different light-emitting colors are driven simultaneously, and in combination with the second microdisplay device 131, the complete full-color image is generated at the same time, forming a color-stable image, reducing the probability of rainbow-like ghosting or color spots appearing at the image edges, thereby improving the user's visual comfort.

[0149] As can be seen from the foregoing, in some embodiments, the second microdisplay device 131 may be a dual-color microdisplay device.

[0150] When the second microdisplay device 131 is a dual-color microdisplay device, it includes two stacked second light-emitting layers with different emitting colors. For example, one second light-emitting layer may be a red light-emitting layer for emitting red light, and the other second light-emitting layer may be a green light-emitting layer for emitting green light; or, for example, one second light-emitting layer may be a red light-emitting layer for emitting red light, and the other second light-emitting layer may be a blue light-emitting layer for emitting blue light, and so on. The two second light-emitting layers are typically driven by the same driver board, and they can be driven simultaneously or in a time-division manner.

[0151] Simultaneous driving refers to the fact that the two colors of the second microdisplay device 131 can be displayed simultaneously in a certain frame of the second optical engine 13, that is, the two colors corresponding to the two second light-emitting layers can be displayed simultaneously in a certain frame of the second optical engine 13; while time-division driving refers to the fact that a frame of the second optical engine 13 is divided into two moments, with one color of the second microdisplay device 131 displayed in the first moment and the other color of the second microdisplay device 131 displayed in the second moment, that is, the color corresponding to one of the second light-emitting layers is displayed in the first moment and the color corresponding to the other second light-emitting layer is displayed in the second moment.

[0152] Although time-division driving causes the two colors of the second microdisplay device 131 to be displayed at different times, the time interval between the two times of time-division display is very short. Utilizing the principle of visual persistence (visual persistence effect), the human eye can perceive both colors. Combined with the first microdisplay device 121, the human eye can observe a full-color image. In certain specific scenarios, the two second light-emitting layers of the second microdisplay device 131, each with different emitting colors, are driven in a time-division manner. A single second light-emitting layer can obtain a larger driving current, resulting in higher brightness.

[0153] It is understandable that when the second microdisplay device 131 includes two stacked second light-emitting layers with different light-emitting colors, the two second light-emitting layers are driven in a time-division manner, and the first microdisplay device 121 is a single device, while one of the second light-emitting layers outputs an image pixel, the first microdisplay device 121 will synchronously output the corresponding image pixel for matching; and while the other second light-emitting layer outputs an image pixel, the first microdisplay device 121 will also synchronously output the corresponding image pixel for matching.

[0154] In this application, it is preferred that the two light-emitting layers of the second microdisplay device 131 with different light-emitting colors are driven simultaneously, in combination with the first microdisplay device 121, so that the complete full-color image is generated at the same time, forming a color-stable image, reducing the probability of rainbow-like ghosting or color spots appearing at the image edges, thereby improving the user's visual comfort.

[0155] In some embodiments, such as Figure 20 As shown, the first light combining device 122 includes two first light combining prisms 1222, the inclined surfaces of the two first light combining prisms 1222 are attached to each other, and a first filter film 1221 is provided on the inclined surface of at least one of the first light combining prisms 1222.

[0156] In other words, the right-angled facet of the first light-combining prism 1222 forms the light-incident side or the light-outcident side, so that the two right-angled faces of the first light-combining prism 1222 correspond to the two first micro-display devices 121 respectively, while the right-angled facet of the other first light-combining prism 1222 opposite to the right-angled facet of one of the first micro-display devices 121 forms the light-outcident side.

[0157] In the above scheme, the first light combining device 122 is composed of two first light combining prisms 1222. Compared with the X-cube light combining prism, it is easier to process and has a lower processing cost, thereby reducing the cost of the full-color augmented reality device 100.

[0158] In some embodiments, such as Figure 21As shown, the second light combining device 132 includes two second light combining prisms 1322, the inclined surfaces of the two second light combining prisms 1322 are attached to each other, and a second filter film 1321 is provided on the inclined surface of at least one second light combining prism 1322.

[0159] In other words, the right-angled facet of the second light-combining prism 1322 forms the light-incident side or the light-outceasing side, so that the two right-angled faces of the second light-combining prism 1322 correspond to the two second micro-display devices 131 respectively, while the right-angled facet of the other second light-combining prism 1322 opposite to the right-angled facet of one of the second micro-display devices 131 forms the light-outceasing side.

[0160] In the above scheme, the second light combining device 132 is composed of two second light combining prisms 1322. Compared with the X-cube light combining prism, it is easier to process and has a lower processing cost, thereby reducing the cost of the full-color augmented reality device 100.

[0161] 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.

[0162] Furthermore, the embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the content of this specification should not be construed as a limitation of this application, and the protection scope of this application should be determined by the appended claims.

Claims

1. A full-color augmented reality device, characterized in that, The full-color augmented reality device includes: The device body has a first side and a second side opposite to each other in a first direction; The first optical engine is disposed on the first side; The second optical engine is disposed on the second side; A waveguide sheet is disposed on the main body of the device, and the waveguide sheet has a first entrance pupil region, a first exit pupil region, a second entrance pupil region, and a second exit pupil region; The light emitted by the first optical engine enters the waveguide plate from the first entrance pupil region and exits into the human eye from the first exit pupil region; the light emitted by the second optical engine enters the waveguide plate from the second entrance pupil region and exits into the human eye from the second exit pupil region. The first optical engine includes one or two first micro-display devices, and the second optical engine includes one or two second micro-display devices. The light emitted by the first micro-display devices and the second micro-display devices includes red light, green light, and blue light, so that the light emitted by the first micro-display devices and the second micro-display devices can be combined into a full-color image in the human eye.

2. The full-color augmented reality device according to claim 1, characterized in that, There is one of each of the first microdisplay device and the second microdisplay device, and at least one of the first microdisplay device and the second microdisplay device is a dual-color microdisplay device.

3. The full-color augmented reality device according to claim 2, characterized in that, One of the first microdisplay device and the second microdisplay device is a dual-color microdisplay device, and the other of the first microdisplay device and the second microdisplay device is a monochrome microdisplay device; The dual-color microdisplay device includes a stacked green light-emitting layer and a blue light-emitting layer, with the blue light-emitting layer located between the green light-emitting layer and the waveguide sheet. The monochrome microdisplay device is a red microdisplay device.

4. The full-color augmented reality device according to claim 2, characterized in that, Both the first microdisplay device and the second microdisplay device are dual-color microdisplay devices; wherein, The first microdisplay device includes a first red light-emitting layer and a first green light-emitting layer stacked together, wherein the first green light-emitting layer is located between the first red light-emitting layer and the waveguide sheet; The second microdisplay device includes a second red light-emitting layer and a second blue light-emitting layer stacked together, with the second blue light-emitting layer located between the second red light-emitting layer and the waveguide sheet.

5. The full-color augmented reality device according to claim 1, characterized in that, The number of the first microdisplay device is two, and the number of the second microdisplay device is one; Two first microdisplay devices are arranged along the first direction. The first optical engine further includes a first light combining device. The first light combining device is disposed on the light emission path of the two first microdisplay devices, and a first filter film is disposed on one surface of the first light combining device. The first filter film allows light emitted by one of the two first microdisplay devices to pass through and can reflect light emitted by the other of the two first microdisplay devices. The first light combining device is used to converge and combine the light emitted by the two first microdisplay devices.

6. The full-color augmented reality device according to claim 5, characterized in that, The two first microdisplay devices are a green microdisplay device and a blue microdisplay device, respectively, and the second microdisplay device is a red microdisplay device.

7. The full-color augmented reality device according to claim 5, characterized in that, The two first microdisplay devices are a red microdisplay device and a green microdisplay device, respectively. The second microdisplay device includes a second red light-emitting layer and a second blue light-emitting layer stacked together, with the second blue light-emitting layer located between the second red light-emitting layer and the waveguide sheet.

8. The full-color augmented reality device according to claim 1, characterized in that, Both the first microdisplay device and the second microdisplay device are two in number; Two first microdisplay devices are arranged along the first direction. The first optical engine further includes a first light combining device. The first light combining device is disposed on the light emission path of the two first microdisplay devices, and a first filter film is disposed on one surface of the first light combining device. The first filter film allows light emitted from one of the two first microdisplay devices to pass through and can reflect light emitted from the other of the two first microdisplay devices. The first light combining device is used to converge and combine the light emitted from the two first microdisplay devices. Two second microdisplay devices are arranged along the first direction. The second optical engine also includes a second light combining device. The second light combining device is disposed on the light emission path of the two second microdisplay devices, and a second filter film is disposed on one surface of the second light combining device. The second filter film allows light emitted from one of the two second microdisplay devices to pass through and can reflect light emitted from the other of the two second microdisplay devices. The second light combining device is used to converge and combine the light emitted from the two second microdisplay devices.

9. The full-color augmented reality device according to claim 8, characterized in that, The two first microdisplay devices are a red microdisplay device and a green microdisplay device, respectively, and the two second microdisplay devices are a red microdisplay device and a blue microdisplay device, respectively; or, Both of the first microdisplay devices are red microdisplay devices, and the two second microdisplay devices are green microdisplay devices and blue microdisplay devices, respectively.

10. The full-color augmented reality device according to claim 1, characterized in that, The first microdisplay device is a dual-color microdisplay device, comprising two stacked first light-emitting layers with different emitting colors, both of which are driven simultaneously; and / or, The second microdisplay device is a dual-color microdisplay device, which includes two stacked second light-emitting layers with different light-emitting colors, and the two second light-emitting layers are driven simultaneously.

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