WO2021017472A1

WO2021017472A1 - Imaging device, ar display apparatus, ar projection assembly and imaging method

Info

Publication number: WO2021017472A1
Application number: PCT/CN2020/078512
Authority: WO
Inventors: 孟玉凰; 楼歆晔; 黄河; 林涛
Original assignee: 上海鲲游光电科技有限公司
Priority date: 2019-07-29
Filing date: 2020-03-10
Publication date: 2021-02-04

Abstract

An imaging device, an AR display apparatus, an AR projection assembly and an imaging method, wherein the imaging device is a MicroLED-based imaging device for sending an image to a projection region (9100); the imaging device comprises: a projection apparatus (100) and a transmission element (30, 920); the projection apparatus (100) emits image light on the basis of a MicroLED; the transmission element (30,920) comprises a coupling-in component (31, 311, 312, 313), a conductive layer (32, 321, 322, 323) and a coupling-out component (33, 331, 332, 333); the image light emitted by the projection apparatus (100) faces the coupling-in component (31, 311, 312, 313); the coupling-in component (31, 311, 312, 313) receives and guides the image light for transmission; the coupling-out component (33, 331, 332, 333) outputs the image light in an outwardly expanding manner; and an image entering the conductive layer (32, 321, 322, 323) from the coupling-in component (31, 311, 312, 313) is totally reflected and outputted to the coupling-out component (33, 331, 332, 333), and then the image is delivered to the projection region (9100). In addition, further provided are a MicroLED-based projection apparatus (100) and an imaging method therefor, wherein the settings in image generation and image transmission are balanced to improve the final display quality.

Description

Imaging equipment, AR display device, AR projection assembly and imaging method

Technical field

The present invention relates to the field of optical imaging, in particular to a visualization device, an AR display device, an AR projection assembly and a visualization method, wherein the visualization device is a MicroLED-based visualization device, and the AR display device is based on MicroLED In the display device, the AR projection component is an AR projection component based on MicroLED.

Background technique

Optical imaging device is an indispensable entertainment facility in modern life. From classic TVs, computers, mobile tablets, to smart phones, smart watches, as well as augmented reality (AR) and virtual reality (Virtual Reality, VR) are specific optical imaging applications. Some existing imaging devices are implemented using optical transmission type or video transmission type. More specifically, for augmented reality technology, optical transmission has become a mainstream implementation method due to its high resolution, no visual deviation, no time delay, and more convenient social habits.

For the imaging device, the light source and the light transmission path are equally important. When the image information of the light-emitting element is clear and effective, the light is reliably transmitted without loss or interference, and the final image can have the best effect. At present, many augmented reality display (AR) or head-up display (Head-up) devices use the method of directly displaying images, and how much information the user can receive from the light source depends on the viewing position. In particular, in optical applications similar to augmented reality display (AR) or head-up display (Head-up), the external ambient light interferes a lot, and the optical design is particularly important.

Most of the existing optical imaging devices using optical transmission are designed based on Bird Bath or free-form surface elements. However, the existing optical imaging device using the optical transmission type has the following disadvantages.

The imaging device composed of the existing optical elements is restricted by the total optical distance. For example, the distance between the lens and the lens is set, which cannot be light and thin enough, and the overall device cannot be paper-based, dial-based, or glasses-based. In addition, restricted by the Lagrangian invariant, the exit pupil radius of the existing optical imaging device is limited, and it is generally not suitable for users with a large interpupillary distance. In terms of image generation, most of the existing image sources are transmissive liquid crystal displays (Liquid Crystal Display, LCD), digital light processors (Digital Light Processing, DLP), digital micromirror devices (Digital Micromirror Device, DMD), silicon Base liquid crystal (Liquid Crystal on Silicon, LCoS), Organic Light-Emitting Diode (OLED) and MEMS Scanning Mirror (MEMS Scanning Mirror) and so on. This type of image source has some defects, and the defects of the image source are fatal to the overall imaging effect. In image transmission, the optical image will be lost during the transmission process after generation, and the imaging effect will gradually be discounted, such as brightness reduction, image distortion, and so on. Therefore, from the perspective of image generation and from the perspective of image transmission must be fully considered, so as to meet the needs of development as a whole.

Specifically, in terms of image sources, passive projections such as LCoS, DLP, MEMS Scanning Mirrror, etc., require the use of external light sources, so the extra devices need to occupy more space, making the overall size not easy to be further reduced, and the assembly cost is also high. . LCD and OLED have the problems of low efficiency and brightness, and high power consumption. OLED burn-in is still a big problem, because the life span of organic materials is limited and the stability is very worrying.

Summary of the invention

An advantage of the present invention is to provide a display device, an AR display device, an AR projection assembly and a display method thereof, in which the image generation and image transmission are balanced to improve the final display quality.

Another advantage of the present invention is to provide a display device, AR display device, AR projection assembly and its display method, which are suitable for augmented reality display (AR) or head-up display (Head-up) application scenarios, and effectively provide Optical display information.

Another advantage of the present invention is to provide a visualization device, an AR display device, an AR projection assembly and a visualization method thereof. With an effective optical design, the overall volume occupation is reduced, and it is suitable for portable use.

Another advantage of the present invention is to provide a display device, an AR display device, an AR projection assembly and a display method thereof, in which an optical display is stably provided to meet the requirements of brightness, clarity, and low energy consumption.

Another advantage of the present invention is to provide a display device, an AR display device, an AR projection assembly and a display method thereof, in which the image is effectively transmitted and presented after being generated, without external interference.

Another advantage of the present invention is to provide a display device, an AR display device, an AR projection assembly and a display method thereof, wherein the light transmission can be made of materials with high visible light transmittance, which is suitable for augmented reality display (AR) Or head-up application scenarios.

Another advantage of the present invention is to provide a display device, an AR display device, an AR projection assembly and a display method thereof, in which an effective image transmission method is used to reduce loss while reducing the volume of the device.

Another advantage of the present invention is to provide a visualization device, an AR display device, an AR projection assembly and a visualization method thereof, wherein the image transmission mode provides multiple output modes to meet different exit pupils (exit pupil radius or exit pupil distance) Needs.

Another advantage of the present invention is to provide a display device, an AR display device, an AR projection assembly and a display method thereof, in which the image generation and transmission links are set as a whole, and they are connected and connected to each other to achieve a display beyond the general combination. Like effect.

Another advantage of the present invention is to provide a display device, an AR display device, an AR projection assembly and a display method thereof, wherein the image transmission does not require additional energy and the overall energy consumption is low.

Another advantage of the present invention is to provide a visualization device, an AR display device, an AR projection assembly and a visualization method thereof, wherein the image generation does not need to use an external light source, and the optical system is relatively simple.

Another advantage of the present invention is to provide a display device, an AR display device, an AR projection assembly and a display method thereof, in which image generation has the performance of high brightness, low power consumption, ultra-high resolution and color saturation.

Another advantage of the present invention is to provide a visualization device, an AR display device, an AR projection assembly and a visualization method thereof, wherein the image generation adopts MircoLED technology.

Another advantage of the present invention is to provide a display device, AR display device, AR projection assembly and its display method, in which the biggest advantage of MicroLED comes from its biggest feature, micron-level pitch, each pixel (pixel) Both can be controlled by addressing and driven by a single point. Compared with other display light sources, MicroLED currently has the highest luminous efficiency, and there is still room for substantial improvement; in terms of luminous energy density, MicroLED is the highest, and there is still room for improvement. The former is conducive to the energy saving of display devices, and its power consumption is about 10% of LCD and 50% of OLED; the latter can save the limited surface area of display devices and deploy more sensors. The current theoretical result is that MicroLED Compared with OLED, to achieve the same display brightness, only about 10% of the coating area of the latter is needed. Compared with the OLED, which is also self-luminous, its brightness is 30 times higher and the resolution can reach 1500PPI (pixel density). The above advantages of MicroLED help to solve the problem that in imaging devices based on exit pupil expansion, the optical efficiency is low due to the loss of light in the process of coupling into and out of the waveguide and transmission, and the large exit pupil reduces the single-point output brightness Difficult problem. In addition, because Micro-LED uses inorganic materials and has a simple structure with almost no light consumption, its service life is very long and there is a lot of room for cost reduction. In recent years, due to technological progress and technological development, the manufacturing difficulty and cost of MicroLED have been drastically reduced.

Another advantage of the present invention is to provide a visualization device, an AR display device, an AR projection assembly and a visualization method thereof, wherein the image transmission adopts waveguide technology.

Another advantage of the present invention is to provide a visualization device, AR display device, AR projection assembly and its visualization method. In the waveguide-based display solution, after a single color or RGB image is injected into the waveguide, light is used on the plane The total reflection transmission in the waveguide element effectively reduces the thickness of the optical element, and one or more optical elements on the waveguide are used to control the image step-by-step output to achieve exit pupil expansion.

Another advantage of the present invention is to provide a display device, an AR display device, an AR projection assembly and a display method thereof, which adopts Micro LED as the image source, does not need to use an external light source, and has a simple optical system.

Another advantage of the present invention is to provide a display device, an AR display device, an AR projection assembly and a development method thereof, which are suitable for flat combiner type, free-form surface element (worm eye) type, and free-form surface prism combination Devices of different AR display device types such as device type or Bird Bath type.

Another advantage of the present invention is to provide a display device, an AR display device, an AR projection assembly and a display method thereof, which can provide high-brightness image display, thereby providing reliable image information to users.

Another advantage of the present invention is to provide a display device, an AR display device, an AR projection assembly and a display method thereof, which are suitable for being integrated into glasses-type devices, and reduce the impact of external light entering the human eye, and it does not harm the outside world. Observation.

Another advantage of the present invention is to provide a display device, AR display device, AR projection assembly and its display method, which are suitable for stand-alone or embedded installation in glasses-type equipment and controlled by wired or wireless to output images Picture.

Another advantage of the present invention is to provide a display device, an AR display device, an AR projection assembly and a display method thereof, using MicroLED as a light source to achieve high-quality image display, and high stability, suitable for daily life or industrial environment use.

Another advantage of the present invention is to provide a visualization device, AR display device, AR projection assembly and its visualization method, which can be used with projection lenses or optical devices to give full play to the advantages of high quality of displayed images and reduce the transmission process. In the loss.

Another advantage of the present invention is to provide a display device, an AR display device, an AR projection assembly and a display method thereof, which can realize the emission and transmission of full-color images and have a wide range of applications.

Another advantage of the present invention is to provide a display device, an AR display device, an AR projection assembly and a display method thereof, which can use a monochromatic light source to realize the output of a full-color image, reduce cost and simplify the structure.

Another advantage of the present invention is to provide a visualization device, an AR display device, an AR projection assembly and a visualization method thereof, which reduce the light loss caused by multiple reflections and reduce the clumsy appearance of the device.

Another advantage of the present invention is to provide a display device, AR display device, AR projection assembly and its display method, which make full use of the self-illumination, high brightness, low power consumption, high resolution and color saturation, and use of MicroLED The advantage of long life effectively solves the problems of large volume of existing devices and difficulty in balancing the transmission and reflection ratio.

Another advantage of the present invention is to provide a display device, an AR display device, an AR projection assembly and a display method thereof, which use Micro LED as the image source, and have a smaller volume than the traditional AR display device.

Another advantage of the present invention is to provide a display device, AR display device, AR projection assembly and its display method, which use Micro LED as the image source, which has higher brightness and lower brightness compared with traditional AR display devices. Power consumption.

Another advantage of the present invention is to provide a display device, an AR display device, an AR projection assembly and a display method thereof, which have low power consumption and save energy.

Another advantage of the present invention is to provide a display device, an AR display device, an AR projection assembly and a display method thereof, which have higher resolution and color saturation than traditional AR display devices.

Another advantage of the present invention is to provide a display device, an AR display device, an AR projection assembly and a display method thereof. Compared with the traditional AR display device, the loss is lower and the service life is long.

Other advantages and features of the present invention are fully embodied by the following detailed description and can be realized by the combination of means and devices specifically pointed out in the appended claims.

According to one aspect of the present invention, a projection device of the present invention that can achieve the foregoing objectives and other objectives and advantages includes:

A light emitting element and a projection lens, wherein the light emitting element includes at least one MicroLED and is controlled to emit image light, and the projection lens is used to collimate the light emitted by the light emitting element.

According to an embodiment of the present invention, the light-emitting element is a MicroLED.

According to another aspect of the present invention, the present invention further provides a display device for sending images to a projection area, including:

The above projection device and a transmission element, wherein the transmission element includes a coupling part, a conductive layer, and a coupling out part, wherein the projection device is controlled to emit image light, and the coupling part receives and guides the image Light transmission, wherein the coupling-out component expands and outputs image light outward, and the image that enters the conductive layer from the coupling-in component is output to the coupling-out component with total reflection.

According to an embodiment of the present invention, wherein the transmission element is a waveguide device.

According to another aspect of the present invention, the present invention further provides a visualization method including the following steps:

Project image light with at least one MicroLED;

Collimating the image light; and

The image light is delivered to project an image at a certain distance.

According to another aspect of the present invention, the present invention provides an AR display device based on Micro LED, which includes:

At least one Micro LED display element for emitting light;

A beam splitter, which is used to reflect the light emitted by the Micro LED display element to the human eye, and the external light is suitable for entering the human eye through the beam splitter.

In some preferred embodiments of the present invention, the beam splitter is a curved beam splitter.

In some preferred embodiments of the present invention, the beam splitter is a flat beam splitter or a beam splitter prism.

In some preferred embodiments of the present invention, the beam splitter is a free-form surface prism group.

In some preferred embodiments of the present invention, the number of the Micro LED display element is two, one of which is a two-color display element and the other is a monochromatic display element. The display device further includes a light combining element. The light combining element is used for combining the light emitted by the two-color display element and the monochromatic display element to form a full-color image light.

In some preferred embodiments of the present invention, the number of the Micro LED display element is three, namely, a first micro display element, a second micro display element, and a third micro display element. The elements are all monochromatic display elements, and the display device further includes a light combining element for combining light emitted by the three micro-display elements to form a full-color image light.

In some preferred embodiments of the present invention, the light combining element is a plurality of color combining prisms.

In some preferred embodiments of the present invention, the display device further includes a projection lens for collimating the light emitted by the Micro LED, and the collimated light is suitable for being The beam splitter reflects.

In some preferred embodiments of the present invention, the projection lens includes two convex lenses stacked on top of each other, and the two convex lenses are used to collimate the light emitted by the Micro LED-based display element.

Correspondingly, in order to achieve at least one of the objectives of the above invention, the present invention further provides a MicroLED-based display method, suitable for providing AR display to a projection area, including the steps:

A. Project image light with at least one MicroLED;

B. Collimate the image light; and

C. Reflect the image light for projection to the external space to display the image.

In some preferred embodiments of the present invention, the light-emitting element includes three monochromatic MicroLEDs, and the step C further includes: transmitting a part of the light emitted by the monochromatic MicroLED through a light combining element and the remaining part The light emitted by the monochromatic MicroLED is reflected so that the light emitted by the three monochromatic MicroLEDs passes through the light combining element to form a full-color image light.

In some preferred embodiments of the present invention, the light-emitting element includes a two-color MicroLED and a matching monochromatic MicroLED, and the step C further includes: emitting light from the monochromatic MicroLED by a light combining element The light transmits and reflects the light emitted by the two-color MicroLED so that the light emitted by the light-emitting element forms a full-color image light after passing through the light combining element.

In some preferred embodiments of the present invention, the light-emitting element includes a two-color MicroLED and a matching monochromatic MicroLED, and the step C further includes: emitting light from the monochromatic MicroLED by a light combining element The light reflects and transmits the light emitted by the two-color MicroLED so that the light emitted by the light-emitting element forms a full-color image light after passing through the light combining element.

In some preferred embodiments of the present invention, the arrangement type of the MicroLED and the beam splitter is selected from at least one of the following types: flat combiner type, free-form surface element type, free-form surface prism combiner type, and bird bath type.

According to another aspect of the present invention, the present invention provides an AR projection assembly based on Micro LED, which includes:

At least one display element, which adopts a Micro LED for emitting image light, wherein the number of the display element is at least two, and at least one of the display elements is a monochromatic display element; and

A light combining element is arranged between the plurality of display elements, and is used for combining light emitted by at least two of the display elements.

According to some embodiments, the light combining element is a color combining prism.

According to some embodiments, the light combining element is a flat optical element coated with a thin film.

According to some embodiments, the light combining element is made by bonding prisms with coating.

According to some embodiments, the configuration of the MicroLED of the display element is selected from a combination: one three-color MicroLED, at least three single-color MicroLEDs, at least one two-color MicroLED and a matching single-color MicroLED.

According to some embodiments, the display element includes three monochromatic MicroLEDs, and the light combining element transmits a part of the light emitted by the monochromatic MicroLED and reflects the remaining part of the light emitted by the monochromatic MicroLED so that the three The light emitted by each monochromatic MicroLED forms a full-color image light after passing through the light combining element.

According to some embodiments, the light combining element includes four right-angle prisms with coatings and forms two diagonal surfaces perpendicular to each other, wherein the light emitted by the two monochromatic MicroLEDs reaches the two diagonal surfaces and is After reflection, the light emitted by the other monochromatic MicroLED is transmitted by the right-angle prism.

According to some embodiments, the display element includes a dual-color MicroLED and a matching single-color MicroLED, and the light combining element transmits the light emitted by the single-color MicroLED and reflects the light emitted by the dual-color MicroLED to make the The light emitted by the display element forms a full-color image light after passing through the light combining element.

According to some embodiments, the display element includes a dual-color MicroLED and a matching single-color MicroLED, and the light combining element reflects the light emitted by the single-color MicroLED and transmits the light emitted by the dual-color MicroLED to make all The light emitted by the display element forms a full-color image light after passing through the light combining element.

According to some embodiments, the light combining element includes a flat optical element with a coating, which is placed at 45° and -45° with the two-color MicroLED and the single-color MicroLED, respectively.

According to some embodiments, it further includes a projection lens for collimating the light emitted by the display element.

According to some embodiments, the one projection lens includes two convex lenses stacked on top of each other, and the two convex lenses are used to collimate the light emitted by the display element.

According to another aspect of the present invention, the present invention further provides a MicroLED-based projection device, including:

According to another aspect of the present invention, the present invention further provides an AR display device based on Micro LED, which is characterized in that it includes:

A frame unit;

At least one display element, which adopts Micro LED, is used to emit image light; and

A beam splitter, wherein the display element and the beam splitter are carried by the frame unit, wherein light emitted by the display element is reflected by the beam splitter, and external light is suitable for passing through the beam splitter .

Through the understanding of the following description and the drawings, the further objectives and advantages of the present invention will be fully embodied.

These and other objectives, features and advantages of the present invention are fully embodied by the following detailed description, drawings and claims.

Description of the drawings

Fig. 1 is a schematic block diagram of a projection device and a display device according to a preferred embodiment of the present invention.

Fig. 2 is an optical schematic diagram of a projection device, a developing device and a developing method thereof according to the above-mentioned preferred embodiment of the present invention.

Fig. 3 is an optical schematic diagram of a projection device, a developing device and a developing method thereof according to another feasible manner of the above-mentioned preferred embodiment of the present invention.

Fig. 4 is an optical schematic diagram of a projection device, a developing device and a developing method thereof in another feasible manner according to the above-mentioned preferred embodiment of the present invention.

Fig. 5 is an optical schematic diagram of a projection device, a developing device and a developing method thereof in another feasible manner according to the above-mentioned preferred embodiment of the present invention.

6A is a schematic plan view of a light combiner of the projection device in the above feasible manner according to the above preferred embodiment of the present invention.

FIG. 6B is a three-dimensional optical schematic diagram of a light combiner of the above-mentioned feasible manner of the projection device according to the above-mentioned preferred embodiment of the present invention.

FIG. 6C is a spectral distribution diagram of light-emitting elements of the projection device in the above feasible manner according to the above preferred embodiment of the present invention.

6D is the reflectance curve of the surface film layer of the light combiner of the projection device in the above feasible mode according to the above-mentioned preferred embodiment of the present invention for different wavelengths, illustrating the curve of surface A in FIGS. 6A and 6B.

6F is the reflectance curve of the surface film layer of the light combiner of the projection device in the above feasible mode according to the above-mentioned preferred embodiment of the present invention for different wavelengths, illustrating the curve of surface B in FIGS. 6A and 6B.

FIG. 7 is a schematic diagram of another light combiner plane optics of the projection device in the above feasible manner according to the above preferred embodiment of the present invention.

Fig. 8 is an optical schematic diagram of a projection device, a developing device and a developing method thereof according to another feasible manner of the above-mentioned preferred embodiment of the present invention.

Fig. 9 is an optical schematic diagram of a projection device, a developing device and a developing method thereof according to another feasible manner of the above-mentioned preferred embodiment of the present invention.

Fig. 10 is a schematic diagram of the application of the projection device and the imaging device according to the above preferred embodiment of the present invention.

FIG. 11 is a schematic structural diagram of a MicroLED-based AR display device and its display method according to the first preferred embodiment of the present invention.

FIG. 12 is a schematic structural diagram of a MicroLED-based AR display device and its display method according to the above-mentioned preferred embodiment of the present invention.

FIG. 13 is a schematic structural diagram of a MicroLED-based AR display device and its display method according to the above-mentioned preferred embodiment of the present invention.

14 is a schematic structural diagram of a Micro LED-based AR display device and its display method according to the second preferred embodiment of the present invention.

FIG. 15 is a schematic structural diagram of a MicroLED-based AR display device and its display method according to the above-mentioned preferred embodiment of the present invention.

FIG. 16 is a schematic structural diagram of a Micro LED-based AR display device and its display method according to the third preferred embodiment of the present invention.

FIG. 17 is a schematic structural diagram of a MicroLED-based AR display device and its display method according to the fourth preferred embodiment of the present invention.

FIG. 18 is a schematic structural diagram of a Micro LED-based AR display device and its display method according to the fifth preferred embodiment of the present invention.

FIG. 19 is a schematic structural diagram of a Micro LED-based AR display device and its display method according to the above-mentioned preferred embodiment of the present invention.

20A is a schematic plan view of a color combining prism of a MicroLED-based AR display device and its development method according to the above preferred embodiment of the present invention.

20B is a schematic diagram of the three-dimensional structure of the color combination prism of the MicroLED-based AR display device and its development method according to the above-mentioned preferred embodiment of the present invention.

FIG. 20C is a schematic diagram of the spectral distribution of the three-color Micro LED of the Micro LED-based AR display device and its display method according to the above-mentioned preferred embodiment of the present invention.

20D is a schematic diagram of the correspondence relationship between the wavelength of the A surface film layer and the reflectance of the color combination prism of the AR display device based on Micro LED and its development method according to the above-mentioned preferred embodiment of the present invention.

20E is a schematic diagram of the correspondence relationship between the wavelength of the B surface film layer and the reflectance of the color combiner prism of the AR display device based on the Micro LED and its development method according to the above-mentioned preferred embodiment of the present invention.

FIG. 21 is an overall schematic diagram of specific applications of a Micro LED-based AR display device and its display method according to the above preferred embodiment of the present invention.

FIG. 22 is a schematic diagram of an application scenario of a MicroLED-based AR display device and its display method according to the above-mentioned preferred embodiment of the present invention.

Detailed ways

The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present 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 present invention.

Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention And to simplify the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so the above terms should not be understood as limiting the present invention.

It can be understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in other embodiments, The number can be multiple, and the term "one" cannot be understood as a restriction on the number.

The invention provides a display device for being controlled to display an image to a projection area. After the image display device is connected with image information, it emits image light, and then projects the image light in the projection area for image development. Those skilled in the art can understand that the projection area may be a screen, a human eye, or other carriers that receive image light. The present invention does not limit the application scenarios of the display device.

It is worth mentioning that, among the different feasible ways of the preferred embodiments provided by the present invention, the elements can be combined and replaced in structure, and the following examples are only specific illustrations.

As shown in Figures 1 to 2, the imaging device of a preferred embodiment of the present invention includes a projection device 100 and a transmission element 30, wherein the transmission element 30 is placed on the projection device 100 Near the object side. After the projection device 100 generates the image light, the image light is transmitted by the transmission element 30 and output at a certain distance for presentation in the projection area.

Specifically, the projection device 100 includes a light-emitting element 10 and an optical lens. The light-emitting element 10 can receive image signals to produce image light, that is, a photoelectric conversion device. The image light emitted from the light-emitting element 10 through the optical lens and then from the transmission element 30 can be directly imaged in the projection area.

It is worth mentioning that the optical lens is specifically a projection lens 20 in this preferred embodiment, and according to different design requirements, the optical lens 20 is further a collimating lens.

More specifically, the transmission element 30 includes a coupling member 31, a conductive layer 32, and a coupling member 33, wherein the image light emitted by the projection device 100 faces the coupling member 31, wherein The image that the coupling member 31 enters the conductive layer 32 is totally reflected until it is output to the coupling member 33, and then the image is transmitted to the projection area. That is, image light enters the conductive layer 32 from the coupling member 31 to the coupling member 33 and is output.

In a feasible manner, the light-emitting element 10 is a MicroLED device, and the transmission element 30 is a waveguide device. The imaging device includes the light-emitting element 10, the projection lens 20, the conductive layer 32, the coupling member 31 and the coupling member 33.

The light-emitting element 10 is used to provide a high-brightness, high-contrast monochrome or RGB image.

The projection lens 20 is used for collimating the light beam emitted by the light-emitting element 10 into a parallel light beam, and forms the projection device together with the light-emitting element 10. The projection lens 20 may be one or more lenses, or a combination of reflective optical elements and transmissive optical elements.

The coupling component 31 is used to couple the output light of the projection device into the conductive layer 32.

The conductive layer 32 is used for totally reflecting the light coupled in from the coupling-in component 31 and propagating toward the coupling-out component 33.

The outcoupling component 33 is used to partially emit and partially transmit the light totally reflected in the conductive layer 32 every time it contacts the outcoupling component 33. The outgoing light is coupled out of the waveguide to the projection area and is directly transmitted through The part continues to be totally reflected in the conductive layer 32 until it is coupled out, and the exit pupil expansion is completed.

Preferably, the conductive layer 32 is a waveguide substrate.

Preferably, the coupling member 31 is a coupling optical element. The coupling-out component 33 is a coupling-out optical element. In other words, the output light of the projection lens 20 is coupled to the conductive layer 32 of the transmission element 30.

Preferably, the light-emitting element 10 is a MicroLED micro display screen.

Specifically, FIG. 1 is a structural block diagram of the projection device and the display device. The projection device is composed of the light-emitting element 10 and the projection lens 20. The output image of the projection device enters the coupling part 31, and then is coupled into the conductive layer 32. Perform multiple total reflections in 32 until the coupling out component 33 is coupled out, enter the projection area, and complete the display process.

As shown in Figure 2, the preferred embodiment provides a visualization method, including the following steps:

A. Project image light with at least one MicroLED;

B. Collimate the image light; and

C. Deliver image light to project images from a certain distance.

Specifically, the imaging device includes the projection device 100 composed of the light-emitting element 10 and the projection lens 20, the coupling member 31, the conductive layer 32, and the coupling member 33. The light-emitting element 10 is used as an image source to display a monochrome or RGB image, that is, step A. The image light emitted by the pixels of the image is collimated into a parallel light beam through the projection lens 20, that is, step B. After the parallel light beam is diffracted by the coupling part 31, the first diffraction order light meets the total reflection condition of the waveguide, is totally reflected in the conductive layer 32, and advances to the coupling part 33, at each When the coupling-out component 33 is touched once, it is diffracted by the partially transmissive part, the diffracted light is coupled out of the conductive layer 32 to reach the projection area, and the directly transmissive part continues to be totally reflected in the conductive layer 32 until it is diffracted out. Enter the projection area, thereby completing the expansion of the exit pupil. That is step C.

Preferably, the coupling part 31 is implemented as an input diffractive optical element.

Preferably, the coupling-out part 33 is implemented as an output diffractive optical element.

The micro-display screen may be a monochromatic or RGB full-color light emitting element 10, which can realize monochromatic display and full-color display, respectively. The projection lens 20 may be one or more lenses, or a combination of reflective optical elements and transmissive optical elements. The coupling part 31 can be selected from a blazed grating, an asymmetric surface relief grating or other diffractive structures with high coupling efficiency. The conductive layer 32 may adopt a flat structure made of optical materials transparent to visible light, and its upper and lower surfaces are parallel. The coupling-in component 31/the coupling-out component 33 can be closely attached to the surface of the conductive layer 32, or embedded in the material of the conductive layer 32; the coupling-out component 33 adopts a period of low coupling diffraction efficiency Sexual structure to ensure continuous light energy output during the expansion of the exit pupil.

This preferred embodiment uses the advantages of MicroLED's self-luminescence, high brightness, low power consumption, high resolution and color saturation, and long service life, combined with the unique characteristics of total reflection transmission and exit pupil expansion of the waveguide display, and the MicroLED's high brightness, The advantages of low power consumption can effectively make up for the low optical efficiency of the waveguide display device with expanded exit pupil, and the large exit pupil makes the short board of single-point output brightness reduction, and finally can achieve a high brightness, low power consumption, small size, An augmented reality display device with large windows and good stability.

The transmission element 30 may specifically adopt a diffractive optical waveguide or a geometric optical waveguide.

The coupling part 31 of the diffractive optical waveguide is optimized to have a high coupling diffraction efficiency to improve the efficiency of the display system and reduce power consumption. The coupling part 31 can be selected from a blazed grating, an asymmetric surface relief grating or other diffractive structures with high coupling efficiency.

The conductive layer 32 of the diffractive optical waveguide can adopt a flat plate structure composed of optical materials transparent to visible light, and its upper and lower surfaces are parallel; the coupling-in part 31/the coupling-out part 33 can be in contact with the surface of the conductive layer 32 It fits tightly and can also be embedded in the material of the conductive layer 32.

The coupling-out component 33 of the diffractive optical waveguide adopts a periodic structure with a low coupling diffraction efficiency to ensure a continuous light energy output during the expansion of the exit pupil.

The coupling part 31 of the geometric optical waveguide may be a reflective surface or a prism, which has a high coupling efficiency, and is used to improve the efficiency of the display system and reduce the power consumption of the system.

The coupling-out component 33 of the geometrical optical waveguide can be a "light combiner", which can generally be composed of a partially transmissive and partially reflective mirror array, which is embedded in the conductive layer 32 and forms with the transmitted light beam in the waveguide. At a specific angle, each mirror surface is coated with an optical film with corresponding reflection-transmittance ratio.

In order to realize full-color display, the RGB full-color light-emitting element 10 can be used, and the RGB color image output by the light-emitting element 10 is input to the transmission element 30, and then coupled to the projection area through the transmission element 30. RGB full-color MicroLED can be obtained by using the RGB three-color LED method. Each pixel contains three RGB three-color LEDs. Generally, the P and N electrodes of the three-color LED are connected to the circuit substrate by bonding or flip-chip. , Use a dedicated LED full-color drive chip to drive each LED with pulse width modulation (PWM) current. The PWM current drive mode can achieve digital dimming by setting the current effective period and duty cycle; RGB full-color MicroLED can also pass UV /Blue LED + luminescent medium method. If UV MicroLED is used, red, green and blue luminescent media need to be excited to achieve the RGB three-color ratio; if blue MicroLED is used, red and green luminescent media need to be matched. Luminescent media can generally be divided into phosphors and quantum dots (QD, Quantum Dots). Nano-material phosphors can emit light of specific wavelengths under the excitation of blue or ultraviolet LEDs. The light color is determined by the phosphor material and is easy to use. This makes the phosphor coating method widely used in LED lighting and can be used as a Typical MicroLED colorization method. Phosphor coating is generally applied to the sample surface by spin coating or dispensing after the integration of the MicroLED and the driving circuit. The particle size of quantum dots is generally between 1 and 10 nm, which is suitable for smaller size micro-displays. Quantum dots also have the effects of electroluminescence and photoluminescence. After being excited, they can emit fluorescence. The color of the light is determined by the material and size. Therefore, the different light-emitting wavelengths can be changed by adjusting the particle size of the quantum dots. When the particle size of the quantum dot is smaller, the light emission color is more blue; when the quantum dot is larger, the light emission color is more red. The chemical composition of quantum dots is diverse, and the light-emitting color can cover the entire visible region from blue to red. Moreover, it has the characteristics of high light absorption-luminescence efficiency, narrow half-height width, and wide absorption spectrum, so it has high color purity and saturation. And the structure is simple, thin, and can be rolled, which is very suitable for micro-display applications. At present, spin coating and spraying techniques can be used to develop quantum dot technology, that is, sprayers and airflow control are used to spray uniform and size-controllable quantum dots. Coating it on the UV/blue LED to make it excited to produce RGB three-color light, and then realize full color through color matching.

In addition, the preferred embodiment also proposes other simpler and easier-to-implement methods to realize full-color display based on MicroLED. Exemplarily, one two-color light-emitting element 10 and one single-color light-emitting element 10 can be used to optically synthesize the two-color image and the single-color image output respectively, and then input to the transmission element 30, and then pass the The transmission element 30 is coupled to output to the projection area; three monochromatic light-emitting elements 10 of R, G, and B can also be used, and the R, G, and B monochromatic images output by them respectively pass through the light combiner 19 Perform optical synthesis, and then input to the transmission element 30, and then couple and output to the projection area through the transmission element 30. The light combiner 19 is made by bonding prisms with different coatings. It exhibits different transmission or reflection characteristics for incident light of different wavelengths. Three monochromatic images of R, G, and B are respectively incident on the light combiner 19 from a specific direction, and the colors are combined into a RGB full-color image.

The beneficial effects of this preferred embodiment are: the combination of the MicroLED and the waveguide display realizes that one plus one is greater than two, and makes full use of the self-illumination of the MicroLED, high brightness, low power consumption, high resolution and color saturation, and long service life. Advantages, combined with the unique characteristics of total reflection transmission and exit pupil expansion of the waveguide display, an augmented reality display device with high brightness, low power consumption, small size, large window and good stability is realized. This preferred embodiment also proposes several full-color waveguide display methods based on MicroLED. The RGB full-color light-emitting element 10 can be used, or a two-color light-emitting element 10 and a single-color light-emitting element 10 can be used for optical integration. Color, or use the three monochromatic light-emitting elements 10 of R, G, B for optical color combination, and cooperate with the transmission element 30 to achieve a simple structure, high brightness, small volume, and high energy consumption Full-color augmented reality display system with low image quality. Other possible ways of this preferred embodiment are explained in detail below.

A display device of another possible mode of the present invention is illustrated, as shown in FIG. 3, wherein the display device includes a light emitting element 10, a projection lens 20, and a transmission element 30, wherein the structure of the light emitting element 10 Similar to the light-emitting element 10 of the imaging device in the above-mentioned preferred embodiment in FIG. 2, the description will not be repeated in the present invention.

This preferred embodiment can be applied to waveguide augmented reality devices of different architectures, such as the imaging device shown in FIG. 3. The transmission element 30 includes the coupling part 31 with a reflective surface for receiving and coupling the parallel light beams projected by the projection device 100. The conductive layer 32 continuously and totally reflects the coupled light to the coupling out structure. The outcoupling component 33 can generally be composed of a partially transmissive and partially reflective mirror array, which is embedded in the conductive layer 32 and forms a specific angle with the transmitted light beam in the waveguide, and each mirror surface is plated with corresponding reflection- Transmittance film. Specifically, the light beam emitted by the monochromatic or RGB full-color light-emitting element 10 is collimated into a parallel light beam by the projection lens 20, and then is coupled into the waveguide by the coupling part 31, and the conductive layer 32 It undergoes multiple rounds of total reflection until it reaches the coupling-out part 33. Each mirror surface of the coupling-out part 33 will reflect part of the light out of the conductive layer 32 and enter the projection area, while the remaining light The transmission continues to advance in the conductive layer 32 in the past. Then this part of the advancing light meets another mirror surface, and the above "reflection-transmission" process is repeated until the last mirror surface in the mirror array reflects all the remaining light out of the conductive layer 32 into the projection area . The geometric optical waveguide is to achieve exit pupil expansion with this solution, and cooperate with MicroLED to realize an augmented reality display device with high brightness, low power consumption, small size, large window and good stability.

In order to realize full-color display, RGB full-color MicroLED micro-display can be used. RGB full-color MicroLED can be obtained by using RGB three-color LED method or UV/blue LED + luminescent medium method. In addition, the present invention also proposes other simpler and easier methods to implement full-color display based on MicroLED.

A visualization device of another possible mode of the present invention is illustrated, as shown in FIG. 4, wherein the visualization device includes a light-emitting element 10, a projection lens 20, and a transmission element 30, wherein the projection lens 20 and the The structure of the transmission element 30 is similar to the projection lens 20 and the transmission element 30 of the imaging device in the above-mentioned preferred embodiment in FIG. 2, and will not be repeated in the present invention.

As shown in FIG. 4, it is a projection device based on a two-color first light-emitting element 11 and a single-color second light-emitting element 12. There are two light-emitting elements 10, and one two-color first light-emitting element 11 can be a red-green MicroLED, a red-blue MicroLED or a blue-green MicroLED. The second light-emitting element 12 is a monochromatic MicroLED, and correspondingly can be a blue MicroLED, a green MicroLED or a red MicroLED. The first light-emitting element 11 and the second light-emitting element 12 are combined by a light combiner 19. The light combiner 19 may be a plane optical element coated with a specific film, and is placed at 45° and -45° with the first light-emitting element 11 and the second light-emitting element 12, respectively. Due to the wavelength selectivity of the coating, the light combiner 19 transmits the light beam emitted by the first light-emitting element 11 and reflects the light beam emitted by the second light-emitting element 12. In the same way, according to different coating methods, the light combiner 19 may also transmit the light beam emitted by the second light-emitting element 12 and reflect the light beam emitted by the first light-emitting element 11. After the optically combined image is collimated by the projection lens 20, it is input to the transmission element 30, and then coupled to the projection area through the transmission element 30 to realize a full-color display. The transmission process of the light beam in the transmission element 30 is the same as the above-mentioned embodiment. The transmission element 30 can be a diffractive optical waveguide or a geometric optical waveguide. FIG. 4 is a diffractive optical waveguide as an example, showing a type based on a two-color MicroLED and a monochromatic MicroLED full-color imaging device, the present invention includes but is not limited to this example.

A visualization device of another possible mode of the present invention is illustrated, as shown in FIGS. 5 to 7, wherein the visualization device includes a light emitting element 10, a projection lens 20, and a transmission element 30, wherein the projection lens The structures of the transmission element 20 and the transmission element 30 are similar to the projection lens 20 and the transmission element 30 of the imaging device in the above-mentioned preferred embodiment in FIG. 2, and will not be repeated in the present invention.

As shown in FIG. 5, it is a display device based on the light-emitting elements 10 of three colors of R, G, and B. The first light-emitting element 11 is a blue MicroLED, the second light-emitting element 12 is a green MicroLED, the third light-emitting element 13 is a red MicroLED, and the three single-color light-emitting elements 10 are performed by the light combiner 19 Heguang. The light combiner 19 is made by bonding prisms with different coatings. It exhibits different transmission or reflection characteristics for incident light of different wavelengths. Three monochromatic images of R, G, and B are respectively incident on the light combiner 19 from a specific direction, and the colors are combined into a RGB full-color image. Taking FIG. 5 as an example for explanation, the first film coated on the first surface of the light combiner 19 reflects the blue light beam emitted by the first light-emitting element 11, and the second film coated on the second surface , The red light beam emitted by the third light-emitting element 13 is reflected, and at the same time, the green light beam emitted by the second light-emitting element 12 passes through the light combiner 19. According to the different placement of the light combiner 19, the three monochromatic light-emitting elements 10 should also be placed in corresponding positions to ensure that the three monochromatic images of R, G, and B are incident on the Combiner 19. The RGB image, which is optically combined by the light combiner 19, is collimated by the projection lens 20, input to the transmission element 30, and then coupled to the projection area through the transmission element 30, to achieve Full color display. The transmission process of the light beam in the transmission element 30 is the same as the above-mentioned embodiment. The transmission element 30 can be a diffractive optical waveguide or a geometric optical waveguide. G and B three monochromatic display devices of the light-emitting element 10, the present invention includes but is not limited to this example.

Table 1 lists the relevant parameters of the MicroLED microdisplay in this embodiment. Table 2 lists some system parameters of this embodiment.

Table 1

Table 2

FIG. 6A shows a schematic plan view of the light combiner 19. The light combiner 19 includes a plurality of light combining elements 191. For example, in this embodiment, it includes four light combining elements 191 implemented as right-angle prisms, that is, the light combiner 19 is composed of four pieces of specific optical films coated Right-angle prism glued together.

Specifically, the four light combining elements 191 included in the light combiner 19 are a first light combining element 1911a, a second light combining element 1912a, a third light combining element 1913a, and a fourth light combining element 1914a, respectively. The first light combining element 1911a, the second light combining element 1912a, the third light combining element 1913a, and the fourth light combining element 1914a are respectively right-angle prisms coated with a specific optical film. The right-angled surfaces of the element 1911a, the second light combining element 1912a, the third light combining element 1913a, and the fourth light combining element 1914a are closely attached to each other to form the light combiner 19.

Further, the two right-angled surfaces of the first light combining element 1911a are 19111a and 19112a respectively, and the right-angled surface 19111a and the right-angled surface 19112a are perpendicular to each other.

The two right-angled surfaces of the second light combining element 1912a are respectively 19121a and 19122a, and the right-angled surface 19121a and the right-angled surface 19122a are perpendicular to each other.

The two right-angled surfaces of the third light combining element 1913a are respectively 19131a and 19132a, and the right-angled surface 19131a and the right-angled surface 19132a are perpendicular to each other.

The two right-angled surfaces of the fourth light combining element 1914a are respectively 19141a and 19142a, and the right-angled surface 19141a and the right-angled surface 19142a are perpendicular to each other.

Referring to FIG. 6A of the specification, the right-angled surface 19111a of the first light combining element 1911a is attached to the right-angled surface 19121a of the second light combining element 1912a, and the only side of the first light combining element 1911a 19112a is attached to the right-angled surface 19141a of the fourth light combining element 1914a; the right-angled surface 19131a of the third light combining element 1913a is attached to the right-angled surface 19122a of the second light combining element 1912a The right-angled surface 19132a of the third light combining element 1913a is attached to the right-angled surface 19142a of the fourth light combining element 1914a.

Referring to Figure 6A of the specification, a red light reflecting film 192 is plated on the first diagonal surface shown in the figure, namely A surface, for reflecting the red light beam emitted by the red MicroLED in the central direction along the first direction; the second diagonal The surface, that is, the surface B is coated with a blue reflective film 193, which is used to reflect the blue light beam emitted by the blue MicroLED in the center direction along the second direction; for the green light beam emitted by the green MicroLED in the center direction along the third direction, the light combiner 19 Transmits it, and the beam propagation direction remains unchanged. Among them, the A surface and the B surface are perpendicular to each other. The three monochromatic images of R, G, and B are respectively incident on the light combiner 19 from the specific direction, and the colors are combined to form an RGB full-color image, and the center direction of the combined image is along the third direction.

Further, in this preferred embodiment, at least one of the right-angled surface 19111a of the first light combining element 1911a and the right-angled surface 19121a of the second light combining element 1912a is plated with The red light reflection film 192.

The red light reflection film 192 is plated on at least the right-angled surface 19132a of the third light combining element 1913a and the right-angled surface 19142a of the fourth light combining element 1914a.

The blue reflection film 193 is plated on at least the right-angled surface 19112a of the second light combining element 1911a and the right-angled surface 19141a of the fourth light combining element 1914a.

The blue reflection film 193 is plated on at least one of the right-angled surface 19131a of the third light combining element 1913a and the right-angled surface 19112a of the first light combining element 1911a.

The red light emitted by the third light-emitting element 13 implemented as a red MicroLED irradiates from the non-right-angled surface of the first light combining element 1911a into the light combiner 19, and is plated on the surface of A to reflect the red light The reflection of the film 192 leaves the light combiner 19 from the non-right angle surface of the fourth light combining element 1914a.

The blue light emitted by the first light emitting element 11 implemented as a blue MicroLED irradiates from the non-right-angled surface of the third light combining element 1913a into the light combiner 19, and passes through the blue light plated on the surface B The reflection of the color reflection film 193 leaves the light combiner 19 from the non-right angle surface of the fourth light combining element 1914a.

The green light emitted by the second light-emitting element 12 implemented as a green MicroLED irradiates from the non-right-angled surface of the second light combining element 1912a into the light combiner 19, and passes through the light combiner 19 The A surface and the B surface leave the light combiner 19 from the non-right-angled surface of the fourth light combining element 1914a.

FIG. 6B shows a three-dimensional schematic diagram of the light combiner 19 of the R, G, and B types.

Figure 6C shows the spectral distribution of the three-color MicroLED in this embodiment.

Fig. 6D shows the reflectance of the A surface film layer in this embodiment for different wavelengths.

Figure 6E shows the reflectivity of the B surface film layer in this embodiment for different wavelengths.

The light combiner 19 can have various forms. FIG. 7 shows a schematic plan view of another R, G, and B light combiner 19. The light combiner 19 includes a plurality of light combining elements 191, more specifically, it includes three light combining

prisms

1911, 1912, 1913, corresponding to three prisms coated with a specific optical film, so that the light combiner 19 is composed of Three prisms coated with a specific optical film are glued together.

The first surface 19111 of the first light combining prism 1911 is attached to the second surface 19122 of the second prism 1912, and the first surface 19131 of the third prism is attached to the first surface 19121 of the second prism 1912.

Specifically, the red light beam emitted by the red MicroLED enters from the third surface 19113 of the first light combining prism 1911, and is firstly totally reflected on the second surface 19112 of the first light combining prism 1911, and then reflected to the first light combining prism The first surface 1911 of 1911 is totally reflected again on the first surface 19111 of the first light combining prism 1911, and is away from the second surface 19112 of the first light combining prism 1911.

The blue light beam emitted by the blue MicroLED enters from the third surface 19123 of the second prism 1912 and is first totally reflected on the second surface 19122 of the second prism 1912, and then is reflected to the second light combining prism 1912 The first surface 19121 undergoes total reflection again, and passes through the first surface 19111 of the first light combining prism 1911 and leaves from the second surface 19112.

The green light beam emitted by the green MicroLED enters the third light combining prism 1913 from the second surface 19132 of the third light combining prism 1913, transmits through the light combiner 19, and finally passes from the second light combining prism 1911. The surface 19112 exits. Three monochromatic images of R, G, and B are respectively incident on the light combiner 19 from a specific direction, and the colors are combined into a RGB full-color image. Wherein, the positions and directions of the three monochromatic MicroLEDs of R, G, and B are flexibly set according to the angle and placement of the prism in the light combiner 19.

It should be pointed out that the red light reflecting film 192 is provided on the first surface 19111 and the second surface 19112 of the first light combining prism 1911. The blue reflection film 193 is provided on the first surface 19121 and the second surface 19122 of the second light combining prism 1912.

It should be pointed out that there is a first predetermined angle between the first surface 19111 and the second surface 19112 of the first light combining prism 1911, so that the red light beam emitted by the red MicroLED comes from the first combining prism 1911. The third surface 19113 of the light prism 1911 enters at a certain angle with the third surface 19113, and can be totally reflected when it is irradiated on the second surface 19112 for the first time, and when it is irradiated on the first surface 19111 for the first time The total reflection can occur at the time, and the light after the total reflection of the first surface 19111 can be emitted when it irradiates the second surface 19112 again.

There is a second predetermined angle between the first surface 19121 and the second surface 19122 of the second light combining prism 1912, so that when the blue light beam emitted by the blue MicroLED comes from the second prism 1912 After the third surface 19123 and the third surface 19123 enter at a certain angle, total reflection occurs when the second surface 19122 of the second light combining prism 1912 is irradiated for the first time. The first surface 19121 of the second light combining prism 1912 is totally reflected, and the light totally reflected by the first surface 19121 of the second light combining prism 1912 irradiates the second light combining prism again The second surface 19122 of the prism 1912 can be incident from the second surface 19122 of the second light combining prism 1912 to the first light combining prism 1911, and from the first light combining prism 1911 The second surface 19112 shoots out.

A display device of another possible mode of the present invention is illustrated, as shown in FIG. 8, wherein the display device includes a light emitting element 10, a projection lens 20, and a transmission element 30, wherein the light emitting element 10 and the The structure of the projection lens 20 is similar to that of the light-emitting element 10 and the projection lens 20 of the display device in the above-mentioned preferred embodiment in FIG. 5, and will not be repeated in the present invention.

For imaging equipment, the use of a single-layer waveguide to transmit three-color light is prone to crosstalk, causing problems such as dispersion and ghost images, and increasing the difficulty of optical design. The preferred embodiment proposes a solution to the above problem. As shown in Figure 8, it is a display device based on R, G, and B three monochromatic MicroLEDs. The light beams emitted by the first light-emitting element 11, the second light-emitting element 12, and the third light-emitting element 13 are combined by the light combiner 19 to form an RGB full-color image, and then pass through the projection lens 20 After collimation, it is input into the transmission element 30. The transmission element 30 includes two layers of the conductive layer 32 with the same structure, but the two conductive layers 32 are designed for different incident wavelengths. Exemplarily, the conductive layer 321 of the first layer is designed for red light, and the conductive layer 322 of the second layer is designed for blue and green light. After the red light component in the RGB image is diffracted by the coupling member 311 of the first layer, it is totally reflected in the conductive layer 321 of the first layer, and proceeds to the coupling out member 331 of the first layer, and is finally diffracted After being diffracted by the coupling member 312 of the second layer, the blue and green light components in the RGB image are totally reflected in the conductive layer 322 of the second layer, and then enter the projection area. The coupling-out component 332 advances, and is finally coupled out by diffraction, and enters the projection area. Through such a double-layer waveguide display device based on R, G, and B three monochromatic MicroLEDs, a full-color display with high image quality and small aberrations is realized. In the same way, the first waveguide may be designed for blue light and the second waveguide may be designed for red and green light, or three-layer waveguides may be used to transmit the red, green, and blue lights respectively. Fig. 8 is a diffractive optical waveguide as an example, showing a full-color double-layer waveguide imaging device based on three monochromatic MicroLEDs of R, G, and B. In fact, the transmission element 30 can be a diffractive optical waveguide or a geometric Optical waveguide, full-color image can use RGB full-color MicroLED micro-emitting element 10, or use a two-color MicroLED light-emitting element 10 and a single-color MicroLED light-emitting element 10, or use R, G, B three monochromatic MicroLED light-emitting elements 10 to provide, the present invention includes but is not limited to this example.

More specifically, in this preferred embodiment, the imaging device of the present invention includes a light-emitting element 10, a projection lens 20, and a transmission element 30, wherein the light emitted by the light-emitting element 10 is passed through the projection lens 20. The transmission element 30 is guided, and is finally led out by the transmission element 30. Preferably, the light-emitting element 10 adopts a three-color MicroLED, as shown in FIG. 9. It is worth mentioning that the transmission element 30 outputs images to the user for viewing, and the viewing position of the user is not limited. In other words, for the output of the display device, the position and angle viewed by the user are not limited. More particularly, the imaging device further includes a light combiner 19, which is arranged on the light-emitting element 10 for transmitting the light through the light combiner 19 to the projection lens 20 Light.

The light-emitting surface of the light combiner 19 is disposed opposite to the projection lens 20, and the light-emitting surface of the projection lens 20 is disposed opposite to the transmission element 30. In other words, the light emitted by the light emitting element 10 is unidirectionally guided to the transmission element 30 to form an image light path. In this preferred embodiment, the light-emitting element 10 is three single-color R, G, and B three-color MicroLEDs, which are called the first light-emitting element 11, the second light-emitting element 12, and the third light-emitting element for the convenience of description. 13. The first light-emitting element 11, the second light-emitting element 12 and the third light-emitting element 13 are respectively arranged in different specific directions of the light combiner 19. It should be noted that the first light-emitting element 11, the second light-emitting element 12, and the third light-emitting element 13 are controlled to emit light, which may be a single light or a monochromatic image. As shown in FIG. 9, the light combiner 19 is a color combining prism, which can emit a full-color image. It can be understood that the positions and angles of the first light-emitting element 11, the second light-emitting element 12 and the third light-emitting element 13 are arranged in accordance with the position of the light combiner 19.

The transmission element 30 includes a coupling member 31, a conductive layer 32 and a coupling member 33, wherein the coupling member 31 and the coupling member 33 are preset on the surface of the conductive layer 32. In this preferred embodiment, the transmission element 30 includes three conductive layers 32, including three coupling parts 31 and three coupling parts 33, respectively. Compared with the foregoing preferred embodiment, each of the conductive layers 32, namely the first conductive layer 321, the second conductive layer 322, and the third conductive layer 323 respectively transmit light of different wavelength bands, to avoid crosstalk. , Dispersion, ghost image and so on. For example, the first conductive layer 321 is for red light, the second conductive layer 322 is for blue light, and the third conductive layer 323 is for green light. That is, after the image is emitted by the first light-emitting element 11, the second light-emitting element 12, and the third light-emitting element 13, it is processed by the light combiner 19 and the projection lens 20, and then The transmission elements 30 are respectively conducted, and finally diffracted out to form the projection area to display an image.

Each conductive layer 32 of this preferred embodiment has its own coupling member 31 and coupling member 33, which are called first coupling member 311, second coupling member 312, and third coupling member. 313, and the first coupling out part 331, the second coupling out part 332, and the third coupling out part 333. Preferably, each coupling-in part 31 and each coupling-out part 33 are designed for different wavelengths and the respective conductive layers 33 respectively. That is to say, each of the coupling-in components 31 and each of the coupling-out components 33 are processed separately, and then projected to a certain distance through different conductive layers 32.

More specifically, the application of this preferred embodiment is shown in FIG. 10, where the projection device 100 and the transmission element 30 are integrated into a wearable glasses.

With reference to Figures 11 to 20E of the specification, the Micro LED-based AR display device and its imaging method provided by the present invention are described. It uses Micro LED as the image source and does not need to use an external light source. The optical system has a simple structure and is different from the traditional Compared with AR display devices, AR display devices have smaller volume, higher brightness and lower cost, which is of great significance to the further development and application of AR display devices.

It is worth mentioning that in the present invention, Micro LED and flat combiner type AR glasses, free-form surface element (worm-eye) type AR glasses, free-form surface prism combiner type AR glasses, and Bird Bath The combination of AR glasses and other AR glasses makes full use of the advantages of Micro LED's self-illumination, high brightness, low power consumption, high resolution and color saturation, and long service life, which effectively solves the large size and difficult balance of the above-mentioned AR glasses. Transparency ratio and other issues. A single-color or full-color augmented reality display device with high brightness, low power consumption, small size and good stability is realized.

Due to the current development of MicroLED microdisplays, some MicroLED microdisplays can display RGB three-color full-color images. There are also some Micro LED microdisplays that can only display R, G, B monochrome or two-color images. Therefore, the present invention designs three single-color Micro LED microdisplays to irradiate the same prism for color combination. The micro display group is named the multi-composite Micro LED micro display group. For some MicroLED microdisplays that can display two of the RGB colors at the same time, the two-color MicroLED microdisplay and a monochromatic MicroLED microdisplay can be irradiated to the same prism at the same time for color combination. Named the dual-composite Micro LED micro display group. For example, the two-color Micro LED micro display can display red (Red) and green (Green). The single-color Micro LED micro display that can display blue (Blue) and the two-color Micro LED micro display can be irradiated to the same prism Mixed and superimposed in, you can get a true color image.

To further illustrate this situation, take the combination of a composite Micro LED micro display group and a flat combiner type AR glasses as an example. The composite Micro LED micro display group includes two structures of dual composite and multi composite. It will be further introduced in the specific implementation. The composite Micro LED micro-display unit can also be combined with various AR glasses such as free-form surface element (worm-eye) type AR glasses, free-form surface prism combiner type AR glasses, bird bath type, and so on.

Specifically, referring to FIG. 11 and FIG. 12 of the specification, the MicroLED-based AR display device and its display method provided by the first preferred embodiment of the present invention are described. In the first preferred embodiment, Micro LED is applied to flat combiner AR glasses, including but not limited to the various flat combiner AR glasses described in the figure.

In the first preferred embodiment, the MicroLED-based AR display device and its imaging method include a display element 910 and a transmission element 920, and the transmission element 920 includes a projection lens 921 and a beam splitter 922 . The display element 910 is used to emit light, and the light emitted by the display element 910 is collimated by the projection lens 921 and then reflected by the beam splitter 922 to human eyes.

Further, the display element 910 is a Micro LED micro display screen, and the light emitted by the Micro LED micro display screen may be RGB monochromatic light or full-color light after RGB mixing. Micro LED is LED miniaturization and matrix technology, which refers to a high-density, small-scale LED array integrated on a chip. Its biggest advantage is that the emitted light has high brightness, high contrast and low power consumption. The MicroLED micro display screen is used to provide high-brightness, high-contrast monochrome or RGB images.

The projection lens 921 may be one or more lenses, or a combination of a reflective optical element and a transmissive optical element, etc., and is used to collimate the light emitted by the display element 910 through the projection lens 921 to emit the display element 910 The light beams are collimated into parallel light beams, and together with the display element 910 form an optical projector.

The beam splitter 922 is a beam splitter 922 with a certain transmittance and reflectance ratio, and the transmittance and reflectance ratio can be realized by plating different films on the surface. The beam splitter 922 can also be divided into a flat beam splitter 922 and a beam splitter prism. Its function is to reflect the light emitted by the display element 910 to the human eye, and at the same time, the human eye can see the outside space. Referring to FIG. 11 of the specification, the beam splitter 922 is a flat beam splitter 922 for reflecting the light collimated by the projection lens 921 to human eyes. Referring to FIG. 12 of the specification, the beam splitter 922 is a beam splitter prism for reflecting light collimated by the projection lens 921 to the human eye.

It can be understood that the flat beam splitter 922 has a lighter weight and a smaller volume relative to the beam splitter prism. Preferably, the beam splitter 922 is implemented as a flat beam splitter 922.

In the first preferred embodiment, the light emitted by the Micro LED display screen is collimated by the projection lens 921 and then projected to the beam splitter 922, and then reflected by the beam splitter 922 to human eyes, and external light can also pass through the splitter 922. The light mirror 922 enters the human eye.

Refer to Figure 13 of the specification, where the Micro LED micro display is an RGB full-color Micro LED display, and its specific parameters are shown in Table 3. In order to achieve high resolution, a high-cost silicon substrate driving method is adopted.

table 3

Referring to FIG. 13 of the specification, the projection lens 921 includes two lenses, and both lenses are convex lenses. The two convex lenses form a lens group, which plays a role of condensing and collimating light. The beam splitter 922 is a beam splitter 922 with a certain transmittance ratio. The light reflected by the beam splitter 922 is irradiated to the pupil of the human eye.

Table 4

Referring to FIG. 13 of the specification, the light emitted by the Micro LED micro display screen is collimated by the two convex lens heads and then projected onto the beam splitter 922, and then reflected by the beam splitter 922 to the human eye. External light can also enter the human eye through the beam splitter 922. Table 4 above is some specific design parameters.

With reference to Figures 14 and 15 of the specification, the MicroLED-based AR display device and its display method provided by the second preferred embodiment of the present invention are described. In the second preferred embodiment, MicroLED is applied The free-form surface element (worm-eye) type AR glasses include, but are not limited to, the various free-form surface element (worm-eye) type AR glasses described in the figure.

In the second preferred embodiment, the MicroLED-based AR display device and its display method include a display element 910 and a beam splitter 922, wherein the display element 910 is a Micro LED micro display screen, and The beam splitter 922 is a curved beam splitter 922 with a certain transmittance ratio, wherein the display element 910 is adapted to emit light, and the beam splitter 922 is used to reflect the light emitted by the display element 910 to the human eye, and external light It can also enter human eyes through the beam splitter 922.

The light emitted by the display element 910 enters the human eye after being reflected by the reflector. The light emitted by the display element 910 may be RGB monochromatic light, or may be a full-color light after RGB is mixed. Micro LED is LED miniaturization and matrix technology, which refers to a high-density, small-scale LED array integrated on a chip. Its biggest advantage is that the emitted light has high brightness, high contrast and low power consumption. The display element 910 is used to provide a high-brightness, high-contrast monochrome or RGB image.

The curved beam splitter 922 with a certain transmittance ratio can be composed of one or more components, and its main function is to reflect the light emitted by the display element 910 back into the human eye.

Free-form surface element (worm-eye) AR glasses adopt a relatively simple optical design. It is equipped with a display element 910 and a curved beam splitter 922 with a specific reflection/transmission (R/T) value. The light emitted by the display element 910 directly hits the concave mirror/combiner and is reflected back into the eye. The ideal position of the display screen is centered and parallel to the curved beam splitter 922 as much as possible. Technically, the ideal position is for the display source to cover the user's eyes, so most designs move the display "off-axis" and set it above the forehead. The off-axis display on the concave mirror has distortion and needs to be corrected on the software/display side.

In some other preferred embodiments of the present invention, a projection lens can be added between the display element 910 and the curved beam splitter 922 with a specific transmittance ratio according to requirements.

The curved beam splitter 922 with a specific transmittance and reflectance ratio may be composed of one or more pieces. Further, the light emitted by the display element 910 may enter the human eye after one reflection, or enter the human eye after multiple reflections. .

Referring to FIG. 14 of the specification, the light emitted by the display element 910 is directly projected onto a curved beam splitter 922 with a specific transmittance, and then reflected by the curved beam splitter 922 and enters the human eye. External light can also enter the human eye through the curved beam splitter 922.

Specifically, referring to Figure 15 of the specification, the display element 910 is an RGB full-color Micro LED display, and the specific parameters are shown in Table 3. In order to achieve high resolution, a high-cost silicon substrate driving method is adopted.

Referring to FIG. 15 of the specification, a convex lens is further provided between the display element 910 and the reflector for condensing and collimating the light emitted by the display element 910. The light emitted by the display element 910 is directly projected to the convex lens and then collimated, and is reflected to the human eye after passing through a curved beam splitter 922 with a specific transmittance and reflection ratio. External light can also enter the human eye through the curved beam splitter 922. Table 5 shows some specific design parameters.

table 5

Referring to Figure 16 of the specification, the third preferred embodiment of the present invention provides a Micro LED-based AR display device and its display method are described. In this preferred embodiment, Micro LED is applied to a free-form surface prism combiner type AR glasses include, but are not limited to, the various free-form surface prism combiner type AR glasses described in the figure.

In the third preferred embodiment, the MicroLED-based AR display device and its display method include a display element 910, a projection lens 921, and a free-form surface prism group 923, wherein the display element 910 is suitable for The projection lens 921 is used to collimate the light emitted by the display element 910, and the free-form surface prism group 923 is used as a beam splitter to reflect the light that has been collimated by the projection lens 921 To the human eye, and external light can also enter the human eye through the free-form surface prism group 923.

The display element 910 is a Micro LED display screen, and the light emitted by the display element 910 may be RGB monochromatic light or full-color light after RGB mixing. Micro LED is LED miniaturization and matrix technology, which refers to a high-density and small-scale LED array integrated on a chip. Its biggest advantage is that the emitted light has high brightness, high contrast and low power consumption. The display element 910 is used to provide a high-brightness, high-contrast monochrome or RGB image.

The projection lens 921 is used to collimate the light beam emitted by the display element 910 into a parallel light beam, and together with the display element 910 form an optical projector. The projection lens 921 may be one or more lenses, or a combination of a reflective optical element and a transmissive optical element, or the like.

The free-form surface prism combiner 9293 can be composed of one or more prisms with a certain transmittance, and can reflect the light emitted by the display element 910 back into the human eye after multiple reflections.

The principle of free-form prism combiner AR glasses is similar to that of free-form component AR glasses. The main components are display source and free combination prism group with reflection/transmission (R/T) value. The light emitted by the display element 910 directly hits the prism group 923 and is reflected back into the eye many times. Multiple reflections will cause some light loss. The biggest disadvantage of this type of design is that it is relatively large and relatively heavy. If LCoS, DLP and other devices are used as image sources, the appearance will be more clumsy and the wearer's experience will be poor.

The light emitted by the display element 910 is collimated by the projection lens 921, and the projection lens 921 may be one or more lenses, or a combination of a reflective optical element and a transmissive optical element.

The free-form surface prism group 923 may be composed of one prism or multiple prisms. The light rays collimated by the projection lens 921 enter the human eye through multiple reflections.

Referring to FIG. 16 of the specification, the light emitted by the display element 910 is collimated by the projection lens 921 and then projected into the free-form surface prism group 923, and enters the human eye after multiple reflections in the free-form surface prism group 923. External light can also enter human eyes through the free-form surface prism group 923.

With reference to Figure 17 of the specification, the fourth preferred embodiment of the present invention provides a Micro LED-based AR display device and its displaying method are described. In the fourth preferred embodiment, the Micro LED is applied to the bird bath ( The Bird Bath type AR glasses include but are not limited to the various Bird Bath type AR glasses described in the figure.

In the fourth preferred embodiment, the MicroLED-based AR display device and its display method include a display element 910, a beam splitter 922 with a certain transmittance and reflectance ratio, and a combiner 930, wherein the display element 910 is adapted to emit light, and the beam splitter 922 is used to reflect the light emitted by the display element 910 to the combiner 930, and the combiner 930 is used to further the light reflected by the beam splitter 922 Reflect, refocus the light into the human eye. The external light can also enter the human eye through the combiner 930 and the beam splitter 922, and the combiner 930 is a concave mirror combiner.

The light emitted by the display element 910 may be RGB monochromatic light, or may be a full-color light after RGB is mixed. Micro LED is LED miniaturization and matrix technology, which refers to a high-density and small-scale LED array integrated on a chip. Its biggest advantage is that the emitted light has high brightness, high contrast and low power consumption. The display element 910 is used to provide a high-brightness, high-contrast monochrome or RGB image.

The beam splitter 922 is a beam splitter 922 with a certain transmittance ratio, and a certain transmittance ratio can be achieved by plating different films on the surface. Its function is to reflect the light emitted by the display element 910 to the concave mirror synthesizer, so that the human eye can see the outside space.

The light emitted by the Bird Bath AR glasses display element 910 is projected to the beam splitter 922. The beam splitter 922 has reflection and transmission values (R/T). Part of the light is reflected by the beam splitter 922. Therefore, the user can At the same time, the physical objects in the real world and the superimposed images of the digital images generated by the display element 910 can be seen. The reflected light is reflected by the beam splitter 922 and then projected into the concave mirror combiner 930. After being reflected again by the combiner 930, the light can be redirected to the human eye.

Referring to FIG. 17 of the specification, the light emitted by the display element 910 is projected on the beam splitter 922, reflected by the beam splitter 922, is projected on the concave mirror combiner 930, and enters the human eye after being reflected by the concave mirror combiner 930 . External light can also enter the human eye through the concave mirror combiner 930 and the beam splitter 922.

With reference to Figure 18 of the specification, the fifth preferred embodiment of the present invention provides a MicroLED-based AR display device and its display method. In the fifth preferred embodiment, a group of dual composite display elements 910 The flat combiner type AR glasses group includes but is not limited to the various AR glasses described in the figure.

In the fifth preferred embodiment, the MicroLED-based AR display device includes a display element 910, a light combining element 930, a projection lens 921, and a beam splitter 922, wherein the display element 910 includes a two-color Micro LED micro display screen and a single color Micro LED micro display screen, the two-color Micro LED micro display screen and the single color Micro LED micro display screen are respectively used to emit light, and the light combining element 930 is used to The light emitted by the two-color Micro LED micro display screen and the monochromatic Micro LED micro display screen are combined, and the combined light is collimated by the projection lens 921, and is reflected to the human eye by the beam splitter 922. In addition, external light can also enter human eyes through the beam splitter 922.

The two-color Micro LED micro display screen may be red and green Micro LED, red and blue Micro LED, or blue and green Micro LED. The monochromatic Micro LED micro display screen may be a blue Micro LED, a green Micro LED or a red Micro LED.

The light combining element 930 may be a plane optical element coated with a specific film, and is placed at 45° and -45° with the two-color Micro LED micro display screen and the monochromatic Micro LED micro display screen, respectively. Due to the wavelength selectivity of the coating, the light combining element 930 reflects the light beam emitted by the two-color Micro LED micro display screen and transmits the light beam emitted by the monochromatic Micro LED micro display screen. Similarly, according to different coating methods, the light combining element 930 may also transmit the light beam emitted by the two-color Micro LED micro display screen and reflect the light beam emitted by the monochromatic Micro LED micro display screen.

With reference to Figure 19 of the specification, the sixth preferred embodiment of the present invention provides a Micro LED-based AR display device and its display method are described. In the sixth preferred embodiment, the Micro LED-based AR display The device and its imaging method include a display element 910, a light combining element 930, a projection lens 921, and a beam splitter 922, wherein the display element 910 is a multi-composite Micro LED micro display panel, especially a group based on Three monochromatic Micro LED micro-display groups of R, G, and B, the display element 910 includes a first micro-display, a second micro-display, and a third micro-display, wherein the first micro-display The screen is a green Micro LED, the second micro display is a blue Micro LED, and the third micro display is a red Micro LED. Table 6 illustrates the relevant parameters of the Micro LED micro display of the sixth preferred embodiment.

Table 6

Referring to FIG. 20A of the specification, the light combining element 930 is a kind of R, G, and B color combining prisms, and the color combining prisms are glued together by four right-angle prisms coated with specific optical films. A red reflective film is plated on the surface of the first diagonal surface A shown in the figure to reflect the red light beams emitted by the red Micro LED along the first direction in the central direction; the surface of the second diagonal surface B is plated with a blue reflective film , Used to reflect the blue light beam with the central direction along the second direction emitted by the blue Micro LED; for the green light beam with the central direction along the third direction from the green Micro LED, the color combining prism transmits it, and the beam propagation direction remains unchanged . Among them, A surface and B surface are perpendicular to each other. The three monochromatic images of R, G, and B are respectively incident on the color combining prism from the specific direction, and the combined colors form an RGB full-color image, and the center direction of the combined image is along the third direction.

Specifically, the four right-angle prisms included in the light combining element 930 are a first right-angle prism 931, a second right-angle prism 932, a third right-angle prism 933, and a fourth right-angle prism 934. The first right-angle prism 931, The second right-angle prism 932, the third right-angle prism 933, and the fourth right-angle prism 934 are right-angle prisms coated with a specific optical film, respectively. The first right-angle prism 931, the second right-angle prism 932, The right-angle surfaces of the third right-angle prism 933 and the fourth right-angle prism 934 are closely attached to each other to form the light combining element 930.

Further, the two right-angled surfaces of the first right-angle prism 931 are respectively 9311 and 9312, and the right-angled surface 9311 and the right-angled surface 9312 are perpendicular to each other.

The two right-angled surfaces of the second right-angled prism 932 are respectively 9321 and 9322, and the right-angled surface 9321 and the right-angled surface 9322 are perpendicular to each other.

The two right-angled surfaces of the third right-angled prism 933 are respectively 9331 and 9332, and the right-angled surface 9331 and the right-angled surface 9332 are perpendicular to each other.

The two right-angled surfaces of the fourth right-angled prism 934 are respectively 9341 and 9342, and the right-angled surface 9341 and the right-angled surface 9342 are perpendicular to each other.

Referring to FIG. 20A of the specification, the right-angled surface 9311 of the first right-angle prism 931 is attached to the right-angled surface 9321 of the second right-angle prism 932, and the right-angled surface 9312 of the first right-angle prism 931 is attached On the right-angle surface 9341 of the fourth right-angle prism 934; the right-angle surface 9331 of the third right-angle prism 933 is attached to the right-angle surface 9322 of the second right-angle prism 932, and the third right-angle The right-angle surface 9332 of the prism 933 is attached to the right-angle surface 9342 of the fourth right-angle prism 934.

With reference to Figure 20A of the specification, the first diagonal surface shown in the figure, that is, the surface A is coated with a red light reflecting film 9351, which is used to reflect the red light beam emitted by the red MicroLED in the central direction along the first direction; the second diagonal The surface, that is, the surface B is coated with a blue reflective film 9352, which is used to reflect the blue light beam emitted by the blue MicroLED in the center direction along the second direction; for the green light beam emitted by the green MicroLED in the center direction along the third direction, the light combining element 930 transmits it, and the beam propagation direction remains unchanged. Among them, the A surface and the B surface are perpendicular to each other. Three monochromatic images of R, G, and B are respectively incident on the light combining element 930 from the specific direction, and the colors are combined to form an RGB full-color image, and the center direction of the combined image is along the third direction.

Further, in this preferred embodiment, at least one of the right-angled surface 9311 of the first right-angle prism 931 and the right-angled surface 9321 of the second right-angle prism 932 is plated with the Red light reflection film 9351.

The red light reflection film 9351 is plated on at least one of the right-angle surface 9332 of the third right-angle prism 933 and the right-angle surface 9342 of the fourth right-angle prism 934.

The blue reflection film 9352 is plated on at least one of the right-angle surface 9312 of the first right-angle prism 931 and the right-angle surface 9341 of the fourth right-angle prism 934.

The blue reflection film 9352 is plated on at least one of the right angle surface 9331 of the third right angle prism 933 and the right angle surface 9312 of the first right angle prism 931.

The display element 910 includes at least one single-color MicroLED. That is to say, the full-color image can use RGB full-color MicroLED display element 910, or use a two-color MicroLED display element 910 and a single-color MicroLED display element 910, or use R, G, B three single-color MicroLED display elements 910 To provide. For the convenience of description, the plurality of display elements 910 are referred to herein as a first display element 911, a second display element 912, and a third display element 913, respectively.

The first display element 911 is a two-color MircoLED, and specifically may be a red-green MicroLED, a red-blue MicroLED, or a blue-green MicroLED. The second display element 912 is a monochromatic MicroLED, and accordingly can be a blue MicroLED, a green MicroLED or a red MicroLED.

For example, the red light emitted by the third display element 913 implemented as a red MicroLED is irradiated from the non-right-angled surface of the first right-angle prism 931 into the light combining element 930, and is plated on the surface of A. The reflection of the light reflection film 9351 leaves the light combining element 930 from the non-right angle surface of the fourth right-angle prism 934.

The blue light emitted by the second display element 912 implemented as a blue MicroLED irradiates from the non-right-angled surface of the third right-angle prism 933 into the light combining element 930, and passes through the blue light plated on the surface B The reflection of the reflective film 9193 leaves the light combining element 930 from the non-right-angle surface of the fourth right-angle prism 934.

The green light emitted by the first display element 911 implemented as a green MicroLED is irradiated from the non-right-angled surface of the second right-angle prism 932 into the light combining element 930, and passes through A of the light combining element 930 The surface and the B surface leave the light combining element 930 from the non-right angle surface of the fourth right-angle prism 934.

Fig. 20B shows a three-dimensional schematic diagram of the R, G, and B color combination prism.

Referring to FIG. 19 of the specification, three monochromatic display elements 910 combine light through a color combining prism. Combination prisms are made by bonding prisms with different coatings. It exhibits different transmission or reflection characteristics for incident light of different wavelengths. Three monochromatic images of R, G, and B are respectively incident on the color combining prism from a specific direction, and the colors are combined into a RGB full-color image. Taking FIG. 19 as an example for illustration, the first film coated on the first surface of the color combination prism reflects the blue light beam emitted by the second micro-display, and the second film coated on the second surface, The red light beam emitted by the third micro-display screen is reflected, while the green light beam emitted by the first micro-display screen passes through the color combining prism. According to the different placement methods of the color combination prism, the three monochromatic Micro LED micro display screens should also be placed in corresponding positions to ensure that the three monochromatic images of R, G, and B are incident on the combination from a specific direction. Color prism. The RGB image that is optically combined by the color combining prism is collimated by the projection lens 921, and then reflected to the human eye by the beam splitter 922.

In order to illustrate the adaptability of the Micro LED-based AR display device and its display method of the present invention, a flat combiner type (as shown in Figures 11 and 12) is provided for the assembly methods of different types of equipment. , 13, 18, 19), free-form surface element (worm-eye) type (as shown in Figure 14, 15), free-form surface prism combiner type (as shown in Figure 16) and bird bath (Bird Bath) type (as shown in Figure 17) embodiments .

Furthermore, the AR display device includes a display element 910, a transmission element 920, and a light combining element 930. In other words, the display element 910, the transmission element 920, and the light combining element 930 can be respectively a flat combiner type (as shown in Figures 11, 12, 13, 18, 19), free-form surface Component (worm-eye) type (as shown in Figures 14 and 15), free-form surface prism combiner type (as shown in Figure 16) and Bird Bath type (as shown in Figure 17) are assembled in AR equipment. Of course, it can also be assembled in other types. The display element 910 is controlled to send out image information. It should be noted that the display element 910 as an output device may be communicatively connected in a wired or wireless manner. Preferably, the display element 910 is applied to AR glasses as a MicroLED micro display screen.

Further, the transmission element 920 includes a projection lens 921 and a beam splitter 922. After the image light emitted by the display element 910 is processed by the projection lens 921, after passing through the beam splitter 922, an image is displayed on a projection area 9100. It is worth mentioning that the image emitted by the display element 910 may be a full-color image or a monochrome image.

Specifically, the beam splitter 922 of the flat combiner AR display device is a flat beam splitter 922, as shown in FIG. 11; a beam splitter prism, as shown in FIG. 12; and a beam splitter 922 with a certain transmittance and reflectance ratio, such as Figure 13. After being collimated by the projection lens 921, the image light is reflected by the beam splitter 922 into the projection area 9100. It is worth mentioning that external light can also pass through the beam splitter 922 to the projection area 9100. The specific optical design parameters are as mentioned above.

Specifically, the beam splitter 922 of the free-form surface element type AR display device is respectively a curved beam splitter 922 with a certain transmittance, as shown in FIGS. 14 and 15. It is worth mentioning that the projection lens 921 in this preferred embodiment is optional and can be set according to the requirements of different optical designs. The light emitted by the display element 910 is directly projected to a curved beam splitter 922 with a certain transmittance, and then enters the projection area 9100 after being reflected by the curved beam splitter 922. External light can also enter the projection area 9100 through the curved beam splitter 922.

Specifically, the beam splitter 922 of the free-form surface prism combiner type AR display device adopts a free-form surface prism group 923, as shown in FIG. 16. The beam splitter 922 of the free-form surface prism group is composed of one prism or multiple prisms. The light rays collimated by the projection lens 921 enter the projection area 9100 after multiple reflections.

Specifically, the beam splitter 922 of the Bird Bath AR display device adopts a beam splitter 922 with a certain transmittance, as shown in FIG. 17. More specifically, the combiner 930 adopts a concave mirror combiner and is arranged on the light exit side of the beam splitter 922. The image light emitted by the display element 910 is projected onto the combiner 930 of the concave mirror after being reflected by the beam splitter 922, and enters the projection after being reflected by the light combining element 930 of the concave mirror District 9100. External light can also enter the projection area 9100 through the combiner 930 and the beam splitter 922 of the concave mirror.

It should be noted that the light combining element 930 is not only suitable for combining external light and image light to emit, but can also be arranged between a plurality of the display elements 910 to provide a full-color image.

As shown in FIGS. 18 to 20, the display element 910 includes at least one single-color MicroLED. That is to say, the full-color image can use RGB full-color MicroLED display element 910, or use a two-color MicroLED display element 910 and a single-color MicroLED display element 910, or use R, G, B three single-color MicroLED display elements 910 To provide. For the convenience of description, the multiple display elements 910 are referred to herein as a first display element 911, a second display element 912, and a third display element 9193, respectively.

As shown in FIG. 18, the first display element 911 is a two-color MircoLED, and specifically may be a red-green MicroLED, a red-blue MicroLED, or a blue-green MicroLED. The second display element 912 is a monochromatic MicroLED, and accordingly can be a blue MicroLED, a green MicroLED or a red MicroLED. The first display element 911 and the second display element 912 are controlled to emit image light. The image light is combined by the light combining element 930, and the light combining element 930 is preferably a plane optical element coated with a specific film. The specific design parameters of the light combining element 930 are as described above.

As shown in Figure 19, a display device based on R, G, and B three monochromatic MicroLEDs. The light beams emitted by the first display element 911, the second display element 912, and the third display element 9193 pass through the light combining element 930 to form an RGB full-color image, and then pass through the transmission element 920 After the projection lens 921 is collimated, it is input to the beam splitter 922.

It should be noted that the light combining element 930 in the embodiments of FIG. 18 and FIG. 19 is used as an example in a planar combiner type AR display device. Those skilled in the art can understand that other types of AR display devices can also adopt a combined design of the display element 910 and the light combining element 930, and other types of the beam splitter 922 can be combined with the In the optical design of the light combining element 930, and the display element 910 and the light combining element 930 can be matched with the above-mentioned other types of optical designs of the beam splitter 922. These combination embodiments will not be repeated again. The display element 910 based on MicroLED and its control display can cooperate with the beam splitter 922 and the light combining element 930. In addition, the overall AR display device including the display element 910 and the transmission element 920 is schematically shown in FIG. 21. The AR display device includes a frame body 950, and the display element 910 and the transmission element 920 are Supported by the frame main body 950. The usage scene is shown in FIG. 22. Not only can external objects be observed through the transmission element 920, but also the image of the display element 910 can be observed through the transmission element 920. In other words, the light emitted by the display element 910 is directly projected onto the transmission element 920, and then enters the projection area 9100 after being reflected by the transmission element 920. External light can also enter the projection area 9100 through the transmission element 920.

In addition, some MicroLED microdisplays can display RGB three-color full-color images. Some MicroLED microdisplays can only display R, G, B monochromatic or two-color images. Therefore, this patent designs a scheme in which three monochromatic MicroLED microdisplays are irradiated to the same prism for color combination. The group is named the multi-composite MicroLED micro-display group. For some MicroLED microdisplays that can display two of the RGB colors at the same time, a dual-color MicroLED microdisplay and a monochromatic MicroLED microdisplay can be irradiated to the same prism at the same time for color combination. This type of MicroLED microdisplay group is named a dual composite type MicroLED micro display group.

The preferred embodiment provides a visualization method including the following steps:

A. Project image light with at least one MicroLED;

B. Collimate the image light; and

Specifically, the AR display device includes the display element 910 and the projection lens 921. The display element 910 is used as an image source to display a monochrome or RGB image, that is, step A. The image light emitted by the pixels of the image is collimated into parallel light beams by the projection lens 921, that is, step B. After being collimated by the projection lens 921, it is reflected by the beam splitter 922 to the human eye, that is, step C.

Those skilled in the art should understand that the above description and the embodiments of the present invention shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been completely and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the principles, the embodiments of the present invention may have any deformation or modification.

Claims

A MicroLED-based imaging device for sending images to a projection area, including:

A projection device, wherein the projection device includes a light-emitting element and a projection lens, wherein at least one MicroLED of the light-emitting element is controlled to emit image light, and the projection lens is used to collimate the light emitted by the light-emitting element ;with

A transmission element, wherein the transmission element includes a coupling part, a conductive layer and a coupling out part, wherein the projection device is controlled to emit image light, and the coupling part receives and guides the image light transmission, wherein The coupling-out component expands and outputs image light outward, and the image that enters the conductive layer from the coupling-in component is output to the coupling-out component with total reflection.
The imaging device according to claim 1, wherein the configuration of the MicroLED of the light-emitting element is selected from a combination: one single-color MicroLED, one three-color MicroLED, at least three single-color MicroLEDs, at least one two-color MicroLED, and a matching one Monochrome MicroLED.
The imaging device according to claim 1, wherein the light-emitting element includes three monochromatic MicroLEDs, and the projection device further includes a light combiner that transmits a part of the light emitted by the monochromatic MicroLED and transmits the remaining part The light emitted by the monochromatic MicroLED is reflected so that the light emitted by the three monochromatic MicroLEDs passes through the light combiner to form a full-color image light.
The imaging device according to claim 3, wherein the light combiner includes four right-angle prisms with coating, and forms two diagonal surfaces perpendicular to each other, wherein the light split by the two monochromatic MicroLEDs respectively reach The two diagonal surfaces are reflected, and the other monochromatic MicroLED is transmitted by the right-angle prism.
The imaging device according to claim 3, wherein the light combiner comprises three light combining prisms with coating, and the light emitted by the two monochromatic MicroLEDs is incident on two of the light combining prisms and then passes through The light path is changed by reflection, the light emitted by the other monochromatic MicroLED enters the remaining light combining prism and then is transmitted, and forms the full-color image light with the reflected light from the two monochromatic MicroLEDs .
The imaging device according to claim 1, wherein the light-emitting element includes a dual-color MicroLED and a matching monochromatic MicroLED, and the projection device further includes a light combiner that responds to the light emitted by the monochromatic MicroLED. Transmit and reflect the light emitted by the two-color MicroLED so that the light emitted by the light-emitting element forms a full-color image light after passing through the light combiner.
The imaging device according to claim 1, wherein the light-emitting element includes a two-color MicroLED and a matching monochromatic MicroLED, and the projection device further includes a light combiner that combines the light emitted by the monochromatic MicroLED The light emitted by the two-color MicroLED is reflected and transmitted so that the light emitted by the light-emitting element passes through the light combiner to form a full-color image light.
7. The imaging device according to claim 6, wherein the light combiner comprises a flat optical element with a coating, which is placed at 45° and -45° with the two-color MicroLED and the single-color MicroLED, respectively.
8. The imaging device according to claim 7, wherein the light combiner comprises a flat optical element with a coating, which is placed at 45° and -45° with the two-color MicroLED and the single-color MicroLED, respectively.
4. The imaging device according to claim 1, wherein the MicroLED of the light-emitting element is connected to the P and N electrodes of the three-color LED with the circuit substrate in a manner selected from bonding and flip-chip.
The imaging device according to claim 1, wherein the light-emitting element is selected from one of UV LEDs and blue LEDs coated with nano-material phosphors to output full-color image light.
The imaging device according to claim 1, wherein the MicroLED output of the light-emitting element is selected from one of monochromatic image light, two-color image light, and full-color image light.
The imaging device according to any one of claims 1 to 12, wherein the transmission element is a waveguide device, and the conductive layer for transmitting light is selected from one of a single-layer waveguide, a double-layer waveguide, and a triple-layer waveguide. Kind, wherein the multilayer waveguides are placed on top of each other.
The imaging device according to any one of claims 1 to 12, wherein the coupling-out part is formed by a partially transmissive and partially reflective mirror array.
The imaging device according to any one of claims 1 to 12, wherein the conductive layer and the coupling-out member transmit light in a manner of repeated reflection and transmission.
The imaging device according to any one of claims 1 to 12, wherein the conductive layer is selected from one of a diffractive optical waveguide and a geometric optical waveguide.
A projection device based on MicroLED, including:

A light emitting element and a projection lens, wherein the light emitting element includes at least one MicroLED and is controlled to emit image light, and the projection lens is used to collimate the light emitted by the light emitting element.
The projection device according to claim 17, wherein the configuration of the MicroLED of the light-emitting element is selected from the group consisting of: one single-color MicroLED, one three-color MicroLED, at least three single-color MicroLEDs, at least one two-color MicroLED and a matched single Color MicroLED.
The projection device according to claim 17, wherein the light-emitting element includes three monochromatic MicroLEDs, and the projection device further comprises a light combiner that transmits a part of the light emitted by the monochromatic MicroLED and transmits the remaining part of the light. The light emitted by the monochromatic MicroLED is reflected so that the light emitted by the three monochromatic MicroLEDs passes through the light combiner to form a full-color image light.
The projection device according to claim 19, wherein the light combiner includes four right-angle prisms with a coating and forms two diagonal surfaces perpendicular to each other, wherein the light split by the two monochromatic MicroLEDs respectively reach the Two diagonal surfaces are reflected, and the other monochromatic MicroLED is transmitted by the right-angle prism.
The projection device according to claim 19, wherein the light combiner comprises three light combining prisms with coatings, and the light emitted by the two monochromatic MicroLEDs is incident on two of the light combining prisms and then reflected When the light path is changed, the light emitted by the other monochromatic MicroLED enters the remaining light combining prism and is transmitted, and forms the full-color image light with the reflected light from the two monochromatic MicroLEDs.
17. The projection device according to claim 17, wherein the light-emitting element comprises a dual-color MicroLED and a matching monochromatic MicroLED, and the projection device further comprises a light combiner that transmits light emitted by the monochromatic MicroLED The light emitted by the two-color MicroLED is reflected so that the light emitted by the light-emitting element passes through the light combiner to form a full-color image light.
The projection device according to claim 17, wherein the light-emitting element comprises a two-color MicroLED and a matching monochromatic MicroLED, and the projection device further comprises a light combiner that reflects the light emitted by the monochromatic MicroLED The light emitted by the two-color MicroLED is transmitted so that the light emitted by the light-emitting element passes through the light combiner to form a full-color image light.
The projection device according to claim 22 or 23, wherein the light combiner comprises a flat optical element with a coating, which is placed at 45° and -45° with the two-color MicroLED and the single-color MicroLED, respectively.
17. The projection device according to claim 17, wherein the MicroLED of the light-emitting element is connected to the P and N electrodes of the three-color LED with the circuit substrate in a manner selected from bonding and flip-chip.
18. The projection device according to claim 17, wherein the light-emitting element is selected from one of UV LED and blue LED coated with nano-material phosphor.
An AR display device based on Micro LED, which is characterized in that it includes:

At least one display element, which adopts Micro LED, is used to emit image light; and

A beam splitter, wherein the light emitted by the display element is reflected by the beam splitter, and external light is suitable for passing through the beam splitter.
The AR display device of claim 27, wherein the beam splitter is a curved beam splitter.
The AR display device of claim 27, wherein the beam splitter is a flat beam splitter.
The AR display device of claim 27, wherein the beam splitter is a beam splitter prism.
The AR display device of claim 29, wherein the beam splitter is a free-form surface prism group.
The AR display device according to claim 29, wherein the number of the display elements is at least two, and at least one of them is a monochrome display element.
The AR display device of claim 32, further comprising a light combining element for combining light emitted by at least two of the display elements.
The AR display device according to claim 32, wherein the number of the display elements is three, namely a first display element, a second display element, and a third display element, wherein the three display elements are respectively A monochrome display element, wherein the display device further includes a light combining element, which is arranged between a plurality of the display elements for combining light emitted by the three display elements to form a full-color image light.
The AR display device according to claim 32, wherein the number of the display element is two, namely a two-color display element and a monochromatic display element, wherein the display device further comprises a light combining element for matching two The light emitted by the display elements are combined to form a full-color image light.
The AR display device of claim 34, wherein the light combining element is a color combining prism.
The AR display device of claim 35, wherein the light combining element is a flat optical element coated with a thin film.
The AR display device according to claim 34, wherein the light combining element is made by bonding prisms with coating.
The AR display device according to any one of claims 27 to 38, further comprising a projection lens, the projection lens is placed between the display element and the beam splitter for emitting light to the display element The light beam is collimated, and the collimated light beam is suitable for being reflected by the beam splitter.
39. The AR display device of claim 39, wherein the projection lens comprises two convex lenses stacked on top of each other, and the two convex lenses are used to collimate the light emitted by the display-based element.
The AR display device of claim 27, further comprising a synthesizer disposed on the light exit side of the beam splitter, wherein the image light emitted by the display element is reflected by the beam splitter and then projected to the The synthesizer is reflected by the synthesizer, and external light can also pass through the synthesizer and the beam splitter.
The AR display device according to claim 41, wherein the synthesizer adopts a concave mirror synthesizer.
The AR display device according to claim 27, wherein the type of arrangement of the display element and the beam splitter is selected from at least one of the following types: a plane combiner type, a free-form surface element type, and a free-form surface prism combiner type And the bird bath type.
An AR display device based on Micro LED, which is characterized in that it includes:

A frame unit;

At least one display element, which adopts Micro LED, is used to emit image light; and

A beam splitter, wherein the display element and the beam splitter are carried by the frame unit, wherein light emitted by the display element is reflected by the beam splitter, and external light is suitable for passing through the beam splitter .
The AR display device according to claim 44, wherein the beam splitter is a curved beam splitter.
The AR display device according to claim 44, wherein the beam splitter is a flat beam splitter.
The AR display device according to claim 44, wherein the beam splitter is a beam splitter prism.
The AR display device of claim 46, wherein the beam splitter is a free-form surface prism group.
The AR display device of claim 46, wherein the number of the display elements is at least two, and at least one of them is a monochrome display element.
The AR display device of claim 49, further comprising a light combining element for combining light emitted by at least two of the display elements.
The AR display device of claim 49, wherein the number of the display elements is three, namely a first display element, a second display element, and a third display element, wherein the three display elements are respectively A monochrome display element, wherein the display device further includes a light combining element, which is arranged between the plurality of display elements, and is used to combine light emitted by the three display elements to form a full-color image Light.
The AR display device according to claim 49, wherein the number of the display elements is two, namely a two-color display element and a single-color display element, wherein the display device further comprises a light combining element for matching two The light emitted by the display elements are combined to form a full-color image light.
The AR display device of claim 51, wherein the light combining element is a color combining prism.
The AR display device of claim 52, wherein the light combining element is a flat optical element coated with a thin film.
The AR display device according to claim 51, wherein the light combining element is made by bonding prisms with coating.
The AR display device according to any one of claims 44 to 55, further comprising a projection lens, the projection lens being placed between the display element and the beam splitter for emitting light to the display element The light beam is collimated, and the collimated light beam is suitable for being reflected by the beam splitter.
The AR display device according to claim 56, wherein the projection lens comprises two convex lenses stacked on top of each other, and the two convex lenses are used to collimate the light emitted by the display element.
The AR display device of claim 44, further comprising a synthesizer disposed on the light exit side of the beam splitter, wherein the image light emitted by the display element is reflected by the beam splitter and then projected to the The synthesizer is reflected by the synthesizer, and external light can also pass through the synthesizer and the beam splitter.
The AR display device according to claim 58, wherein the combiner adopts a concave mirror combiner.
The AR display device according to claim 44, wherein the type of arrangement of the display element and the beam splitter is selected from at least one of the following types: a plane combiner type, a free-form surface element type, and a free-form surface prism combiner type And the bird bath type.
An AR projection assembly based on Micro LED, which is characterized in that it includes:

At least one display element, which adopts a Micro LED for emitting image light, wherein the number of the display element is at least two, and at least one of the display elements is a monochromatic display element; and

A light combining element is arranged between the plurality of display elements, and is used for combining light emitted by at least two of the display elements.
The projection assembly according to claim 61, wherein the light combining element is a color combining prism.
The projection assembly according to claim 61, wherein the light combining element is a flat optical element coated with a thin film.
The projection assembly according to claim 61, wherein the light combining element is made by bonding prisms with coating.
The projection assembly according to claim 61, wherein the configuration of the MicroLED of the display element is selected from the group consisting of: one three-color MicroLED, at least three single-color MicroLEDs, at least one two-color MicroLED and a matching single-color MicroLED.
The projection assembly according to claim 65, wherein the display element comprises three monochromatic MicroLEDs, and the light combining element transmits a part of the light emitted by the monochromatic MicroLED and transmits the remaining part of the light emitted by the monochromatic MicroLED It is reflected so that the light emitted by the three monochromatic MicroLEDs forms a full-color image light after passing through the light combining element.
The projection assembly according to claim 66, wherein the light combining element includes four right-angle prisms with coatings and forms two diagonal surfaces perpendicular to each other, wherein the light split by the two monochromatic MicroLEDs respectively reach the The two diagonal surfaces are reflected, and the other monochromatic MicroLED is transmitted by the right-angle prism.
The projection assembly according to claim 61, wherein the display element comprises a dual-color MicroLED and a matching single-color MicroLED, and the light combining element transmits the light emitted by the single-color MicroLED and emits the dual-color MicroLED The light is reflected so that the light emitted by the display element passes through the light combining element to form a full-color image light.
The projection assembly according to claim 61, wherein the display element comprises a dual-color MicroLED and a matching single-color MicroLED, and the light combining element reflects the light emitted by the single-color MicroLED and emits the dual-color MicroLED The light is transmitted through the display element to form a full-color image light after passing through the light combining element.
The projection assembly according to claim 68, wherein the light combining element comprises a flat optical element with a coating, which is placed at 45° and -45° with the two-color MicroLED and the single-color MicroLED, respectively.
The projection assembly according to claim 69, wherein the light combining element comprises a flat optical element with a coating, which is placed at 45° and -45° with the two-color MicroLED and the single-color MicroLED, respectively.
The projection assembly according to any one of claims 61 to 71, further comprising a projection lens, the projection lens being used to collimate the light emitted by the display element.
The projection assembly according to claim 72, wherein the one projection lens comprises two convex lenses stacked on top of each other, and the two convex lenses are used to collimate the light emitted by the display-based element.
A visualization method including the following steps:

Projecting image light by at least one light-emitting element;

Collimate the image light; and

The image light is transported in total reflection to project the image from a certain distance.
The imaging method according to claim 74, wherein the light-emitting element is a MicroLED, and a waveguide device is used to transmit the image light.
The imaging method according to claim 74, wherein the light-emitting element includes a light combiner, wherein the light-emitting element includes three monochromatic MicroLEDs, which transmit a part of the light emitted by the monochromatic MicroLED and transmit the remaining part The light emitted by the monochromatic MicroLED is reflected so that the light emitted by the three monochromatic MicroLEDs forms a full-color image light after passing through the light combiner.
The imaging method according to claim 75, wherein the light combiner includes four right-angle prisms with coatings and forms two diagonal surfaces perpendicular to each other, wherein the light split by the two monochromatic MicroLEDs respectively reach The two diagonal surfaces are reflected, and the other monochromatic MicroLED is transmitted by the right-angle prism.
The imaging method according to claim 75, wherein the light combiner comprises three light combining prisms with coating, and the light emitted by the two monochromatic MicroLEDs respectively enters two of the light combining prisms and then passes through The light path is changed by reflection, the light emitted by the other monochromatic MicroLED enters the remaining light combining prism and then is transmitted, and forms the full-color image light with the reflected light from the two monochromatic MicroLEDs .
The imaging method according to claim 74, wherein the light-emitting element includes a dual-color MicroLED and a matching monochromatic MicroLED, and the projection device further includes a light combiner that responds to the light emitted by the monochromatic MicroLED. Transmit and reflect the light emitted by the two-color MicroLED so that the light emitted by the light-emitting element forms a full-color image light after passing through the light combiner.
The imaging method according to claim 74, wherein the light-emitting element includes a dual-color MicroLED and a matched monochromatic MicroLED, and the projection device further includes a light combiner that combines the light emitted by the monochromatic MicroLED It reflects and transmits the light emitted by the two-color MicroLED so that the light emitted by the light-emitting element forms a full-color image light after passing through the light combiner.
The imaging method according to claim 78 or 79, wherein the light combiner comprises a flat optical element with a coating, which is placed at 45° and -45° with the two-color MicroLED and the single-color MicroLED, respectively.
The development method according to claim 74, wherein the MicroLED of the light-emitting element is connected to the P and N electrodes of the three-color LED with the circuit substrate in a manner selected from bonding and flip-chip.
The imaging method according to claim 74, wherein the light-emitting element is selected from one of UV LED and blue LED coated with nano-material phosphor to output full-color image light.
The imaging method according to claim 74, wherein the MicroLED output of the light-emitting element is selected from one of monochromatic image light, two-color image light, and full-color image light.
A MicroLED-based imaging method, suitable for providing AR display to a projection area, is characterized by comprising the steps:

A. Project image light with at least one MicroLED;

B. Collimate the image light; and

C. Reflect the image light for projection to the external space to display the image.
The imaging method according to claim 85, wherein the light-emitting element comprises three monochromatic MicroLEDs, and the step C further comprises: transmitting a part of the light emitted by the monochromatic MicroLED by a light combining element and combining The remaining part of the light emitted by the monochromatic MicroLED is reflected so that the light emitted by the three monochromatic MicroLEDs passes through the light combining element to form a full-color image light.
The imaging method according to claim 85, wherein the light-emitting element comprises a dual-color MicroLED and a matched monochromatic MicroLED, and the step C further comprises: applying a light combining element to the monochromatic MicroLED The emitted light transmits and reflects the light emitted by the two-color MicroLED so that the light emitted by the light-emitting element forms a full-color image light after passing through the light combining element.
The imaging method according to claim 85, wherein the light-emitting element comprises a dual-color MicroLED and a matched monochromatic MicroLED, and the step C further comprises: applying a light combining element to the monochromatic MicroLED The emitted light reflects and transmits the light emitted by the two-color MicroLED so that the light emitted by the light-emitting element forms a full-color image light after passing through the light combining element.
The imaging method according to claim 85, wherein the setting type of the MicroLED and the beam splitter is selected from at least one of the following types: a plane combiner type, a free-form surface element type, a free-form surface prism combiner type, and Bird bath type.