Laser projection device and wearable device

Abstract

A laser projection device (100) and a wearable device. The laser projection device (100) comprises: a laser display assembly (10), wherein the laser display assembly (10) comprises three microcavity laser arrays (101, 101a, 101b, 101c), each microcavity laser array (101, 101a, 101b, 101c) comprises a plurality of laser units (103), there are correspondence relationships between the laser units (103) in the three microcavity laser arrays (101, 101a, 101b, 101c), and the three microcavity laser arrays (101, 101a, 101b, 101c) are respectively used for generating a green laser image, a blue laser image and a red laser image; a light combining assembly (20), the light combining assembly (20) being used for combining laser beams emitted by laser units (103) having a correspondence relationship to one pixel point, so as to combine the green laser image, the blue laser image and the red laser image into a target laser image; a controller, the controller being electrically connected to the laser display assembly (10), and the controller being used for receiving a driving signal and controlling a display parameter of each laser unit (103) on the basis of the driving signal; and a lens (30), the lens (30) being arranged on a light emitting path of the light combining assembly (20), and the lens (30) receiving the target laser image emitted from the light combining assembly (20) and emitting a projection image.

Description

Laser projection equipment and wearable devices

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411570158.2, filed on November 5, 2024, entitled "Laser Projection Device and Wearable Device", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of laser projection display technology, and more particularly to a laser projection device and a wearable device. Background Technology

[0004] In projection equipment, the excellent monochromaticity, wide color gamut coverage, long lifespan, high brightness, and low energy consumption of laser light sources have led to their widespread use in the field of projection display technology.

[0005] Currently, laser projection equipment generally uses three-color lasers to emit three basic laser beams: green, blue, and red. These beams are processed by a series of optical components such as reflectors, dichroic filters, diffusers, and lens groups, and are finally focused onto the surface of a digital micromirror device (DMD) to reflect and form an image, which is then magnified and projected onto a screen through a projection lens.

[0006] Digital micromirror devices (DMIs) consist of numerous miniature, highly reflective aluminum micromirrors, each representing a pixel. DMIs control a ±12° deflection via digital signals to reflect the laser beam to the projection lens, while unreflected beams are wasted. Therefore, the use of DMIs reduces the beam utilization rate of laser projection equipment. Furthermore, the high cost of DMIs hinders further cost reductions in laser projection equipment. Summary of the Invention

[0007] A first aspect of this application provides a laser projection device, comprising:

[0008] A laser display component; the laser display component includes: three sets of microcavity laser arrays, each set of microcavity laser arrays includes multiple laser units, the laser units in the three sets of microcavity laser arrays have a corresponding relationship, and the three sets of microcavity laser arrays are respectively used to generate green laser images, blue laser images and red laser images;

[0009] A light combining component is disposed on the light emission path of the laser display component; the light combining component is used to combine the laser beams emitted by the corresponding laser units into a single pixel, thereby combining the green laser image, the blue laser image, and the red laser image into a target laser image;

[0010] A lens, positioned along the light-emitting path of the light-combining assembly, receives the target laser image incident upon the light-combining assembly and projects a projected image; and

[0011] A controller is electrically connected to the laser display assembly. The controller is used to receive drive signals and control the display parameters of each laser unit according to the drive signals.

[0012] A second aspect of this application provides a wearable device, including:

[0013] Wearing body, the wearing body including lenses;

[0014] A camera is disposed on the wearable body, and the camera is used to capture a first video;

[0015] A processing device is disposed on the wearable body and connected to the camera, the processing device being used to process the first video into a driving signal;

[0016] A laser projection device, wherein the laser projection device is the aforementioned laser projection device; the laser projection device is connected to the processing device and displays a target laser image under the control of the drive signal; and

[0017] A light-reflecting element is disposed on the wearer and located in the light output path of the laser projection device, and the light-reflecting element is used to reflect the target laser image to the lens. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 is a schematic diagram of the optical path principle of an existing laser projection device;

[0020] Figure 2 is one of the schematic diagrams of the optical path principle of the laser projection device provided in the embodiment of this application;

[0021] Figure 3 is one of the structural schematic diagrams of the microcavity laser array in the laser projection device provided in the embodiments of this application;

[0022] Figure 4 is a schematic diagram of the structure of the driving unit, laser unit and microlens unit in the laser projection device provided in the embodiment of this application;

[0023] Figure 5 is a second schematic diagram of the structure of the microcavity laser array in the laser projection device provided in the embodiment of this application;

[0024] Figure 6 is a third schematic diagram of the structure of the microcavity laser array in the laser projection device provided in the embodiments of this application;

[0025] Figure 7 is a fourth schematic diagram of the structure of the microcavity laser array in the laser projection device provided in the embodiments of this application;

[0026] Figure 8 is the fifth schematic diagram of the structure of the microcavity laser array in the laser projection device provided in the embodiment of this application;

[0027] Figure 9 is a sixth schematic diagram of the structure of the microcavity laser array in the laser projection device provided in the embodiments of this application;

[0028] Figure 10 is one of the schematic diagrams of the alignment process of the microcavity laser array in the laser projection device provided in the embodiments of this application;

[0029] Figure 11 is a schematic diagram of the optical detection system in the laser projection device provided in the embodiment of this application performing optical detection;

[0030] Figure 12a is a second schematic diagram of the alignment process of the microcavity laser array in the laser projection device provided in the embodiment of this application;

[0031] Figure 12b is a third schematic diagram of the alignment process of the microcavity laser array in the laser projection device provided in the embodiments of this application;

[0032] Figure 12c is a fourth schematic diagram of the alignment process of the microcavity laser array in the laser projection device provided in the embodiments of this application;

[0033] Figure 13 is the seventh schematic diagram of the structure of the microcavity laser array in the laser projection device provided in the embodiment of this application;

[0034] Figure 14 is a second schematic diagram of the optical path principle of the laser projection device provided in the embodiment of this application;

[0035] Figure 15 is a schematic diagram of the support structure in the laser projection device provided in the embodiment of this application.

[0036] Explanation of reference numerals in the attached figures: 100-Laser projection equipment; 10-Laser display assembly; 101-Microcavity laser array; 101a-First microcavity laser array; 101b-Second microcavity laser array; 101c-Third microcavity laser array; 102-Substrate; 103-Laser unit; 103a-Backup laser unit; 104-Epipolar layer; 105-Display area; 20-Light combining assembly; 201-First light combining element; 202-Second light combining element; 203-Third light combining element; 204-Light combining element; 30-Lens; 40-Bracket; 50-Optical detection system; 60-Collimating element; 601-Microlens unit; 70-Screen; 80-Sub-driving unit. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0039] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0040] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0041] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0042] In the field of projection equipment, the choice of light source is crucial to the image quality of the projected image. Traditional projection equipment typically uses light-emitting diodes (LEDs) as light sources. However, LED light sources have relatively low electro-optical efficiency, complex optical paths, and require display devices such as DMDs or liquid crystal displays (LCDs) to control the light and generate images. Such a configuration not only increases the size and cost of the projector but may also limit the brightness and color performance of the image.

[0043] Laser light sources, as a highly efficient light source, are widely used in projection display technology due to their advantages such as good monochromaticity, wide color gamut, long lifespan, high brightness, and low power consumption. As shown in Figure 1, the laser projection device 100' mainly emits green, blue, and red primary color laser beams through a tri-color laser 10'. These beams then pass through a series of optical elements such as a dichroic filter 20', a diffuser 30', and a lens group 40' before entering the optomechanical optical guide 50'. After refraction by multiple lens groups 60', the laser beam enters a total internal reflection (TIR) ​​prism 80', where it totally reflects, converges, and focuses the beam onto the surface of a digital micromirror device 70' for reflection, forming an image that is then imaged and magnified on the screen through a lens 90'.

[0044] However, existing three-color laser display technology relies on digital micromirror devices (DMVs). These DMVs are not only expensive, but also waste unreflected beams by using digital signals to control ±12° deflection to reflect the laser beam to the projection lens, reducing the light energy utilization of the laser projection device. Furthermore, these complex optical components increase the overall size of the laser projection device, hindering further miniaturization.

[0045] Based on this, this application provides a laser projection device 100, which can improve light energy utilization and reduce the production cost of the laser projection device 100.

[0046] Figure 2 shows a schematic diagram of the optical path of the laser projection device 100.

[0047] In some embodiments, the laser projection device 100 may include a laser display component 10. The laser display component 10 includes three microcavity laser arrays 101.

[0048] As shown in Figure 3, each microcavity laser array 101 includes multiple laser units 103. A microcavity laser array 101 can emit a laser image of a single "primary color." Here, "primary color" refers to an original color that cannot be obtained by mixing other colors. New colors can be created by combining these primary colors in different proportions. Typically, the primary colors can be green, blue, and red.

[0049] A laser image emitted by a set of microcavity laser arrays 101 can be an image composed of laser beams emitted by multiple laser units 103. A laser beam emitted by one laser unit 103 can be a pixel of the laser image.

[0050] In some embodiments, as shown in FIG2, the three sets of microcavity laser arrays can be respectively a first microcavity laser array 101a, a second microcavity laser array 101b, and a third microcavity laser array 101c. The three sets of microcavity laser arrays 101 are used to generate laser images with different primary colors.

[0051] In some embodiments, the first microcavity laser array 101a can generate a green laser image. The laser units 103 in the first microcavity laser array 101a are used to emit green laser beams, which can form a green laser image. The wavelength of the green laser beam is 515 nm to 540 nm.

[0052] In some embodiments, the second microcavity laser array 101b can generate a blue laser image. The laser units 103 in the second microcavity laser array 101b are used to emit blue laser beams, which can form a blue laser image. The wavelength of the blue laser beam is 440 nm to 480 nm.

[0053] In some embodiments, the third microcavity laser array 101c can generate a red laser image. The laser units 103 in the third microcavity laser array 101c are used to emit red laser beams, which can form a red laser image. The wavelength of the red laser beam is 625 nm to 650 nm.

[0054] In some embodiments, any of the microcavity laser arrays 101 described above can be micro laser diode arrays (Micro-LD Panels). A micro-LD panel includes multiple laser units 103. Micro-LD arrays have low operating thresholds, relatively low energy consumption, and high electro-optical conversion efficiency, ensuring effective light utilization. Furthermore, the weak coherence between the laser units 103 in the micro-LD array helps reduce speckle phenomena, improves the clarity and quality of the projected image, and meets miniaturization requirements.

[0055] In some embodiments, any of the microcavity laser arrays 101 described above can be vertical cavity surface-emitting laser (VCSEL) arrays. The beam emitted by a VCSEL exhibits a circularly symmetrical Gaussian distribution with a small beam divergence angle, resulting in better laser beam quality and directionality, facilitating beam shaping. Simultaneously, the lateral dimensions of a VCSEL are small, typically between a few and tens of micrometers, making it easy to fabricate large-scale, high-density monolithically integrated two-dimensional arrays, thereby obtaining larger and brighter projected images. Furthermore, the active region of a VCSEL is small, resulting in relatively low energy consumption and high electro-optical conversion efficiency.

[0056] In some embodiments, the microcavity laser array can also be one of the following: a resonant cavity light-emitting diode (RCLED) array, an edge-emitting laser (EEL) array, a micro resonant cavity light-emitting diode (Micro RCLED) array, a micro-light-emitting diode (Micro-LED) array, a miniature light-emitting diode (Mini-LED) array, a quantum dot light-emitting diode (QLED) array, an organic light-emitting diode (OLED) array, or a micro-scale organic light-emitting diode (Micro-OLED) array. All of the above arrays can meet the requirements of using the microcavity laser array 101 as both a display source and a laser source.

[0057] In some embodiments, the three sets of microcavity laser arrays 101 should be laser arrays of the same type, so as to establish a correspondence between the laser units 103 in the three sets of microcavity laser arrays 101.

[0058] In some embodiments, the laser projection device 100 may further include an image processor. The image processor can be used to receive raw digital video / image signals, and can decode and process the raw digital video / image signals (such as scaling, color management, gamma correction, etc.), and convert the processed signals into drive signals in a signal format suitable for controlling the laser display component 10. The drive signals can be image-related drive signals or video-related drive signals.

[0059] In some embodiments, the laser projection device 100 may further include a controller. The controller may include one or more driving circuits, which may be complementary metal-oxide-semiconductor (CMOS) driving circuits.

[0060] In some embodiments, a driving circuit can drive one microcavity laser array 101 to operate. Alternatively, a driving circuit can drive multiple microcavity laser arrays 101 to operate.

[0061] In some embodiments, the controller may receive a drive signal sent by the image processor and control the display parameters of each laser unit 103 in the microcavity laser array 101 according to the drive signal.

[0062] Specifically, the driving circuit can decode the driving signal to obtain the pixel address of each laser unit 103 in the microcavity laser array 101 and the display parameters of that laser unit 103. Then, based on the pixel address, it determines the corresponding laser unit 103 and controls that laser unit to emit laser light according to the aforementioned display parameters. The display parameters may include the brightness, grayscale, and color parameters of the laser beam emitted by the laser unit 103.

[0063] As shown in Figure 4, the driving circuit may include multiple sub-driving units 80 arranged in an array. Each sub-driving unit 80 is correspondingly configured with one laser unit 103, and each sub-driving unit 80 controls the corresponding laser unit 103 to work independently. Each sub-driving unit 80 can provide a precise driving current to each laser unit 103, and dynamically adjust the current pulse width and frequency using an intelligent algorithm to control the display parameters of each laser unit 103. This allows the microcavity laser array 101 to adapt to the changes in each frame of the original digital video signal, thereby achieving high-quality laser image output.

[0064] Specifically, through the driving control of the driving circuit, the first microcavity laser array 101a, the second microcavity laser array 101b, and the third microcavity laser array 101c can generate dynamic green laser images, blue laser images, and red laser images.

[0065] In some embodiments, as shown in FIG2, the laser projection device 100 may further include a light combining component 20. The light combining component 20 is located on the light output path of the laser display component 10, that is, the laser beams emitted from the laser units 103 in the three sets of microcavity laser arrays 101 can all pass through the light combining component 20.

[0066] A laser unit 103 in the first microcavity laser array 101a has a corresponding relationship with a laser unit 103 in the second microcavity laser array 101b and a laser unit 103 in the third microcavity laser array 101c. The beam combining component 20 can combine the laser beams emitted from the three laser units 103 of the three microcavity laser arrays 101 into a single pixel. After all the corresponding laser units 103 are combined, the green laser image, blue laser image, and red laser image emitted from the three microcavity laser arrays 101 can be combined into a single laser image, i.e., the target laser image.

[0067] In some embodiments, the beam combining component 20 can reflect the laser beams emitted from three laser units 103 of the three sets of microcavity laser arrays 101 that have a corresponding relationship, thereby changing the transmission path of the laser units 103 and combining the laser beams emitted from the laser units 103 of the three sets of microcavity laser arrays 101 into a single pixel. After the laser beams emitted from all the corresponding laser units 103 are combined by the reflection of the beam combining component 20, the green laser image, blue laser image, and red laser image emitted from the three sets of microcavity laser arrays 101 can be combined into a single laser image, i.e., the target laser image.

[0068] It should be noted that each microcavity laser array 101 may include M rows and N columns of laser units 103. The correspondence between the laser units 103 of the different microcavity laser arrays 101 can be a positional correspondence, and they are beamed to the same pixel. For example, there is a correspondence between the laser units 103 in the J-th row and I-th column of the first microcavity laser array 101a, the laser units 103 in the J-th row and I-th column of the second microcavity laser array 101b, and the laser units 103 in the J-th row and I-th column of the third microcavity laser array 101c, and so on.

[0069] Alternatively, these corresponding laser units 103 may not correspond in position, but they are combined to the same pixel location during beam combining. For example, a correspondence can be established between the laser units 103 in the J-th row and I-th column of the first microcavity laser array 101a, the laser units 103 in the J+1-th row and I+1-th column of the second microcavity laser array 101b, and the laser units 103 in the J+2-th row and I+3-th column of the third microcavity laser array 101c. Then, a correspondence can be established between the laser units 103 in the J-th row and I+1-th column of the first microcavity laser array 101a, the laser units 103 in the J+1-th row and I+2-th column of the second microcavity laser array 101b, and the laser units 103 in the J+2-th row and I+4-th column of the third microcavity laser array 101c, and so on. The specific method for establishing the above correspondence to align and combine the three laser units 103 will be explained in detail later.

[0070] It is understood that the target laser image mentioned above can be a laser image formed by combining green laser image, blue laser image and red laser image. Therefore, the target laser image can have higher brightness and richer color expression.

[0071] Specifically, the light combining component 20 may include multiple light combining elements, which may be dichroic filters or prisms with light combining function.

[0072] In some embodiments, as shown in FIG2, the laser projection device 100 may include a lens 30. The lens 30 may be located on the light output path of the light combining component 20, thereby receiving the target laser image emitted after the light is combined by the light combining component 20.

[0073] Lens 30 can further focus, adjust and magnify the target laser image emitted by the light combining component 20 to form a projected image and accurately project it onto the screen or projection surface.

[0074] It should be noted that the laser projection device 100' in the related technology mainly emits green, blue, and red laser beams from a three-color laser. These beams are then processed by a series of optical elements such as reflectors, dichroic filters, diffusers, and lens groups, ultimately converging onto the surface of a digital micromirror device (DMM) for reflection. The DMM processes the laser beams to form an image, which is then magnified and displayed on a screen via a lens 30. In contrast, the laser projection device 100 provided in this application has a controller that can control the display parameters of each laser unit 103 in the laser display assembly 10. The laser beams emitted by the three microcavity laser arrays 101 are combined by the beam combining assembly 20 to obtain the target laser image, eliminating the need for a DMM or other image processing elements to further process the laser beams. The target laser image emitted by the beam combining assembly 20 can be directly projected into the lens 30, and after being magnified and emitted by the lens 30, a projected image is obtained.

[0075] It is understood that since the laser projection device 100 provided in this application embodiment does not need to be configured with a digital micromirror device, the laser beam does not need to be deflected by ±12°, thus avoiding the light energy loss caused by beam deflection. That is, in the laser projection device 100 provided in this application embodiment, the laser beam generated by the laser display component 10 can enter the lens 30 more, thereby improving the light energy utilization efficiency of the laser projection device 100.

[0076] Meanwhile, unlike the laser projection device 100' which requires a series of optical elements (e.g., reflectors, dichroic filters, diffusers, and lens groups) to process the laser beam, the laser projection device 100 provided in this application embodiment has a more streamlined optical path structure, thereby enabling the laser projection device 100 to be further miniaturized.

[0077] Furthermore, the laser projection device 100 provided in this application embodiment can serve not only as a laser light source but also as a display source. Specifically, the three microcavity laser arrays 101 respectively display a green laser image, a blue laser image, and a green laser image, and the target laser image can be displayed after the above laser images are combined. As described above, compared with projection devices that use LEDs as light sources and require additional display devices or display elements, the structure of this laser projection device 100 can be further simplified and miniaturized.

[0078] Thus, the laser projection device 100 provided in this application embodiment controls the display parameters of each laser unit 103 in the laser display component 10 individually through a controller. The laser beams emitted by the corresponding laser units in the three sets of microcavity laser arrays 101 are combined by the light combining component 20 and converged to a single pixel. After multiple pairs of corresponding laser units are combined, a target laser image can be obtained. The light combining component 20 projects the target laser image onto the lens 30 for magnification, and the projected image can be directly projected without configuring digital micromirror devices or other image processing elements in the laser projection device 100 to further process the laser beam. On the one hand, this can improve the light energy utilization rate of the laser projection device 100; on the other hand, it can simplify the optical path structure of the laser projection device 100 and further reduce the production cost of the laser projection device 100.

[0079] In some embodiments, as shown in FIG2, the light combining component 20 may include a first light combining element 201. The first light combining element 201 may be located on the light output path of the first microcavity laser array 101a. The first light combining element 201 can reflect the laser beam emitted by the laser unit 103 in the first microcavity laser array 101a, thereby changing the transmission path of the laser beam emitted by the laser unit 103 in the first microcavity laser array 101a.

[0080] Specifically, the first light combining element 201 can be a dichroic filter.

[0081] In some embodiments, as shown in FIG2, the light combining component 20 may include a second light combining element 202. The second light combining element 202 may be located on the light output path of the second microcavity laser array 101b. The second light combining element 202 is capable of reflecting the laser beam emitted from the laser unit 103 in the second microcavity laser array 101b, thereby changing the transmission path of the laser beam emitted from the laser unit 103 in the second microcavity laser array 101b.

[0082] Simultaneously, the second light combiner 202 is also located in the light output path of the first light combiner 201, and transmits the laser beam from the first light combiner 201 into the second light combiner 202. Specifically, the second light combiner 202 can be a dichroic filter.

[0083] Dichroic filters selectively reflect light beams within a predetermined wavelength range and transmit light within other wavelength ranges. For example, the second beam combiner 202 can selectively reflect the blue laser beam emitted from the second microcavity laser array 101b to alter the transmission path of the blue laser beam, and transmit the green laser beam reflected by the first beam combiner 201. As long as the laser normal exit angles of the first and second microcavity laser arrays 101a and 101b are adjusted to a suitable angle, the two laser beams emitted by the second beam combiner 202 can be combined into a single laser beam.

[0084] In some embodiments, as shown in FIG2, the light combining component 20 may include a third light combining element 203. The third light combining element 203 may be located on the light output path of the third microcavity laser array 101c. The third light combining element 203 can reflect the laser beam emitted by the laser unit 103 in the third microcavity laser array 101c, thereby changing the transmission path of the laser beam emitted by the laser unit 103 in the third microcavity laser array 101c.

[0085] Simultaneously, the third beam combiner 203 is located in the light-emitting path of the second beam combiner 202 and transmits the laser beam emitted by the second beam combiner 202 into the third beam combiner 203. Specifically, the third beam combiner 203 can be a dichroic filter.

[0086] For example, the third beam combiner 203 can selectively reflect the red laser beam emitted by the third microcavity laser array 101c and transmit the combined blue and green laser beam emitted by the second beam combiner 202.

[0087] Similarly, as long as the laser normal emission angles of the first microcavity laser array 101a, the second microcavity laser array 101b, and the third microcavity laser array 101c are adjusted to a suitable angle, the three laser beams can be combined into a single laser beam by the third beam combiner 203. In this way, the beam combiner 20 can combine the laser beams emitted from the three corresponding laser units 103 in the first microcavity laser array 101a, the second microcavity laser array 101b, and the third microcavity laser array 101c into the same pixel. After the laser beams emitted from all the corresponding laser units 103 are combined, multiple pixels can be formed, thereby creating a target laser image.

[0088] It should be noted that the first light combiner 201, the second light combiner 202, and the third light combiner 203 can selectively reflect visible light different from the examples described above and transmit visible light of other colors, depending on actual needs. That is, in one possible embodiment, the first light combiner 201 can be used to reflect a red laser beam, the second light combiner 202 can be used to reflect a green laser beam, and the third light combiner 203 can be used to reflect a blue laser beam, as long as the light combining assembly 20 can achieve the combining of the three-color laser beams. This application embodiment does not impose any limitations on this.

[0089] In this way, the light combining component 20 can combine three primary color laser beams with corresponding relationships into the same pixel to obtain a target laser image with rich colors.

[0090] In one possible embodiment, as shown in FIG2, the first light combiner 201, the second light combiner 202 and the third light combiner 203 are arranged linearly and parallel to each other.

[0091] Specifically, the first light combiner 201, the second light combiner 202, and the third light combiner 203 can be arranged in sequence. The first light combiner 201 is tilted relative to the first microcavity laser array 101a, the second light combiner 202 is tilted relative to the second microcavity laser array 101b, and the third light combiner 203 is tilted relative to the third microcavity laser array 101c.

[0092] It is understandable that the parallel arrangement of the first beam combiner 201, the second beam combiner 202, and the third beam combiner 203 can maintain the stability and directional consistency of the laser beam during transmission. Furthermore, the parallel arrangement of the first beam combiner 201, the second beam combiner 202, and the third beam combiner 203 simplifies the optical path adjustment process. Once the angle of one beam combiner is determined, the positions of the other beam combiners can be relatively easily determined through their parallel relationship. This simplifies the attitude adjustment process of the beam combining assembly 20 and improves the accuracy of laser beam synthesis and image quality.

[0093] In some embodiments, as shown in FIG3, each group of microcavity laser arrays 101 includes multiple laser units 103, and the diameter of each laser unit 103 is D1, wherein D1 satisfies: D1 > 0.7 μm, D1 < 800 μm.

[0094] D1 < 800μm, which allows the size of a single laser unit 103 to be controlled within a small range, can increase the number of laser units 103 in the laser matrix, thereby increasing the number of pixels in the target laser image after beam combining, thus improving the imaging quality of the laser projection device 100.

[0095] If D1 is too large, for example, D1 > 800 μm, it may reduce the number of laser units 103 in the microcavity laser array 101, thereby reducing the number of pixels in the target laser image and affecting the imaging quality of the laser projection device 100.

[0096] Since the size of the laser unit 103 is positively correlated with the light output power of the laser unit 103, and D1 > 0.7 μm, each laser unit 103 can generate sufficient light output power while maintaining a certain size, so as to ensure the brightness and clarity of the target laser image.

[0097] If D1 is too small, for example, D1 < 0.7 μm, although the number of laser units 103 in the microcavity laser array 101 can be further increased, the light output power of the laser unit 103 may be limited due to its small size, resulting in insufficient light intensity generated by each laser unit 103, which in turn affects the brightness and clarity of the target laser image.

[0098] In some embodiments, D1 can be set in the range of 0.7 μm to 800 μm, which can take into account both the number of laser units 103 and the optical output power of the laser units 103. In this way, it can be ensured that there are enough laser units 103 in the microcavity laser array 101 to realize high-resolution target laser images and projection images, and that each laser unit 103 can provide sufficient light intensity to ensure the brightness and clarity of the target laser image.

[0099] Furthermore, D1 can be set in the range of 5μm to 500μm, thereby further balancing the high pixel count, high brightness, and high definition of the target image.

[0100] Specifically, D1 can be 5μm, 10μm, 15μm, 20μm, 25μm, 30μm, 50μm, 60μm, 70μm, 100μm, 130μm, 150μm, 180μm, 200μm, 230μm, 250μm, 280μm, 300μm, 330μm, 350μm, 380μm, 400μm, 430μm, 450μm, 480μm, or 500μm.

[0101] In some embodiments, as shown in FIG3, in any group of microcavity laser arrays 101, the distance between the center of each laser unit 103 and the center of an adjacent laser unit 103 in the same row or column is L1, and L1 satisfies: L1 > 1.5 μm, L1 < 1600 μm.

[0102] It is important to note that the spacing between adjacent laser units 103 along the same row or column also affects the display effect of the projected image. A spacing of L1 > 1.5 μm ensures sufficient spatial isolation between adjacent laser units 103, thereby reducing direct mutual interference (i.e., crosstalk) between laser beams. Crosstalk leads to a decrease in the color purity and contrast of the laser beam, affecting the visual effect of the projected image. By maintaining L1 > 1.5 μm, this interference can be effectively reduced, allowing the beam emitted by each laser unit 103 to be projected independently and clearly, thus ensuring the color accuracy and image clarity of the target laser image after beam combining.

[0103] If L1 < 1.5 μm, meaning the spacing between adjacent laser units 103 in the same row or column is too small, it may enhance the mutual interference between laser beams. In this case, the laser beams emitted by adjacent laser units 103 may overlap in space, resulting in a superposition effect of light intensity, thereby changing the original characteristics of the beams and causing the edges of the projected image to blur, reducing the image clarity.

[0104] In addition, the small spacing between adjacent laser units 103 in the same row or column may cause heat dissipation problems. The heat generated by the laser units 103 may be conducted to each other and cause local temperature rise, thereby affecting the stability and lifespan of the microcavity laser array 101.

[0105] With L1 < 1600 μm, the overall brightness of the microcavity laser array 101 can be kept within a suitable range. Brightness is a crucial indicator in the laser projection device 100, directly affecting the visibility of the projected image and the user's viewing experience. Therefore, limiting L1 to within 1600 μm ensures sufficient filling of the laser units 103, allowing the laser beam to fully fill the projection surface and maintain a high brightness level for the projected image.

[0106] If L1 is too large, for example, L1 > 1600 μm, it will cause the overall brightness of the microcavity laser array 101 to decrease.

[0107] In some embodiments, the value of L1 can range from 1.5 μm to 1600 μm, which can balance the parameters of the projected image in dimensions such as beam interference, light energy filling and overall brightness.

[0108] Furthermore, the value of L1 can range from 10μm to 1000μm to further balance the brightness and sharpness of the projected image.

[0109] Specifically, L1 can be 10μm, 20μm, 30μm, 40μm, 50μm, 60μm, 100μm, 120μm, 140μm, 200μm, 260μm, 300μm, 360μm, 400μm, 4600μm, 500μm, 560μm, 600μm, 660μm, 700μm, 760μm, 800μm, 860μm, 900μm, 960μm, or 1000μm.

[0110] In some embodiments, in any set of microcavity laser arrays 101, Q laser units 103 can form a combination. Multiple pairs of laser units 103 can be arranged in an array.

[0111] Specifically, Q can be a positive integer greater than or equal to 3. The Q laser units 103 can be arranged according to a preset pattern. The preset pattern can be a polygon. For example, as shown in Figures 5, 6, and 7, the preset pattern can be any of a triangle, a square, and a quadrilateral, with each laser unit located at a corner of the preset pattern.

[0112] As mentioned above, the laser units 103 in different microcavity laser arrays 101 can have a corresponding relationship. Q laser units 103 can form a laser unit 103 combination arrangement, which can make each laser unit 103 combination maintain a consistent relative position and orientation in its respective microcavity laser array 101, thereby reducing the difficulty of aligning the laser units 103 in different microcavity laser arrays 101.

[0113] In some embodiments, as shown in FIG3, any microcavity laser array 101 includes M rows and N columns of laser units 103, wherein each laser unit 103 is used to emit a laser beam for forming a target laser image. The microcavity laser array 101 includes a display area 105, which is the area formed by the M rows and N columns of laser units 103.

[0114] Thus, the alignment of the display areas 105 of the three sets of microcavity laser arrays 101 requires that the laser units 103 with the same row and column numbers in each set of microcavity laser arrays 101 correspond one-to-one, that is, a correspondence is established between the laser units 103 with the same row and column numbers.

[0115] In some embodiments, as shown in Figures 8 and 9, each microcavity laser array 101 includes M rows and N columns of laser units 103. The microcavity laser array 101 includes a display area 105, which includes A rows and B columns of laser units 103, where A < M and B < N. There is a one-to-one correspondence between the multiple laser units 103 within the display areas 105 of the three sets of microcavity laser arrays 101.

[0116] Specifically, in this embodiment, as shown in FIG9, any M-row N-column microcavity laser array 101 may include a display laser unit 103 in A-row B-column, and may also include multiple spare laser units 103a, located in the J2-row I1, J2-row I2, J1-row I1, and J1-row I2 columns. That is, in addition to the laser unit 103 in the display area 105, the microcavity laser array 101 also includes other spare laser units 103a, which may have the same structure as the laser unit 103 in the display area 105 and may emit laser beams.

[0117] The backup laser unit 103a is used to align the display areas 105 of the three microcavity laser arrays 101. During the alignment process of the three microcavity laser arrays 101, the backup laser unit 103a can also be used to establish the correspondence between multiple laser units 103 in different microcavity laser arrays 101, so that the laser beams emitted from the three laser units 103 in the three microcavity laser arrays 101 are aligned to a pixel after being reflected by the light combining component 20, thereby aligning the display areas 105 of the three microcavity laser arrays 101.

[0118] Furthermore, the backup laser unit 103a emits a laser beam during the alignment of the display areas 105 of the three sets of microcavity laser arrays 101. This laser beam is used to verify whether the display areas 105 are aligned.

[0119] In one possible implementation, multiple backup laser units 103a may be located on the periphery of the display area 105, or at least on one side.

[0120] In this implementation, as shown in Figure 9, multiple backup laser units 103a can be located on the outer periphery of the display area 105. During the alignment process, the controller can control several backup laser units 103a with the same row and column numbers in each microcavity laser array 101 to emit laser beams.

[0121] Furthermore, as shown in Figure 10, the controller can also control multiple backup laser units 103a in each microcavity laser array 101 to emit laser beams with preset patterns (as illustrated by the dark fill in Figure 10, a pattern formed by several pixels). As shown in Figure 10, the controller can control the multiple backup laser units 103a (illustrated by the dark fill) to emit laser beams during the alignment process, thereby reducing the difficulty of alignment.

[0122] As shown in Figure 11, the laser beams emitted from the spare laser units 103a of the three microcavity laser arrays (101a, 101b, 101c) are combined by the beam combining components (201, 202, 203) to form a verification laser image. Then, an optical detection system 50 (such as a high-resolution camera CCD or CMOS image sensor) captures the combined verification laser image, extracts key features such as edges, corners, and textures from the verification laser image, and performs image quality analysis to check for issues such as ghosting, color deviation, and blurring. If no such issues exist, it indicates that the display areas 105 in the three microcavity laser arrays 101 are aligned, and a correspondence has been established between the laser units 103 in the display areas 105 of different microcavity laser arrays 101. If such issues exist, the laser normal emission angle of at least one of the three microcavity laser arrays 101 needs to be adjusted until the issues are eliminated. In this way, the multiple laser units 103 in the display area 105 of the three sets of microcavity laser arrays 101 can correspond one-to-one, and the laser beams emitted by the three laser units 103 with corresponding relationships can be combined into a single pixel.

[0123] Subsequently, when the microcavity laser array 101 needs to be in display mode, the controller can control the aforementioned backup laser unit 103a to stop emitting laser beams, and control the laser unit 103 in the display area 105 to emit laser beams according to the drive signal, so as to save power.

[0124] Thus, the laser unit 103 on the outer periphery or one side of the display area 105 is used as a backup laser unit 103a. The backup laser unit 103a can be located on the outer periphery or one side of the display area 105 of the microcavity laser array 101. Since the laser unit 103 on the outer periphery is more likely to be damaged during the process of adjusting the laser normal emission angle of the microcavity laser array 101, using the laser unit 103 on the outer side of the microcavity laser array 101 as a backup laser unit 103a can improve the service life of the microcavity laser array 101.

[0125] In another possible implementation, the display area 105 and the spare laser unit 103a in the microcavity laser array 101 are determined during the alignment process of multiple microcavity laser arrays 101, that is, the positions of the display area 105 and the spare laser unit 103a in the microcavity laser array 101 can vary.

[0126] As mentioned earlier, the size of the laser unit 103 is at the micrometer level, making it relatively difficult to combine the three laser units 103 in the three sets of microcavity laser arrays 101 to the same pixel. Therefore, some spare laser units 103a can be set in the microcavity laser array 101 to increase the alignment difficulty of the microcavity laser array 101.

[0127] For example, as shown in Figures 12a, 12b and 12c, during the alignment process, a display area 105 can be initially defined in each group of microcavity laser arrays 101. The first laser unit 103 of the display area 105 can be the laser unit 103 in the second row and third column shown in Figures 12a-c. The laser unit 103 outside the display area 105 can be temporarily used as a backup laser unit 103a.

[0128] It is understandable that the goal of the alignment and debugging process is to establish a correspondence between the second row and the third column of each microcavity laser array 101, so that the display areas 105 of the three microcavity laser arrays 101 are aligned. However, due to the very small size of the laser unit 103, during the alignment and debugging process, the following debugging result may occur: the laser unit 103 in the second row and third column of the display area 105 of the third microcavity laser array 101c, the laser unit 103 in the first row and first column of the first microcavity laser array 101a that is temporarily used as a backup laser unit 103a and is close to the second row and third column, and the laser unit 103 in the second row and second column of the second microcavity laser array 101b that is temporarily used as a backup laser unit 103a and is close to the second row and third column, are finally combined into a single pixel. After the key features are extracted by the optical detection system 50, the edge, corner, texture, etc. of this pixel do not have problems such as ghosting, color deviation, or blurring. In this case, the alignment and debugging of the three sets of microcavity laser arrays 101 can be stopped, and the aforementioned backup laser unit 103a can be changed to the laser unit 103 in the display area 105. The display areas 105 of the first microcavity laser array 101a and the second microcavity laser array 101b can be re-aligned.

[0129] Thus, by setting multiple backup laser units 103a in the microcavity laser array 101, the alignment difficulty of the display area 105 of the multiple microcavity laser arrays 101 can be reduced, the alignment time can be shortened, and the production efficiency of the laser application equipment can be improved.

[0130] In some embodiments, as shown in FIG13, each microcavity laser array 101 may include a substrate 102. A plurality of laser units 103 of each microcavity laser array 101 may be formed on the substrate 102.

[0131] The substrate 102 can be a substrate layer. It can be a support structure to support multiple laser units 103. These laser units 103 can be formed by epitaxially growing an epitaxial layer 104 on the substrate layer.

[0132] In some embodiments, as shown in FIG14, the first microcavity laser array 101a includes a first substrate. The first substrate may be a substrate layer made of gallium nitride (GaN) material, and the laser unit 103 on the first substrate is used to emit a green laser beam.

[0133] In some embodiments, the second microcavity laser array 101b includes a second substrate. The second substrate may be a substrate layer made of gallium nitride (GaN) material, and the laser unit 103 on the second substrate is used to emit a blue laser beam.

[0134] In some embodiments, the third microcavity laser array 101c includes a third substrate. The third substrate may be a substrate layer made of gallium arsenide (GaAs) material, and the laser unit 103 on the third substrate is used to emit a red laser beam.

[0135] In some embodiments, the first substrate and the second substrate can be an integral structure, that is, the first substrate and the second substrate can be the same substrate 102.

[0136] Thus, the laser unit 103 emitting a blue laser beam and the laser unit 103 emitting a green laser beam can be formed on the same substrate 102, improving the integration of the laser display component 10 and making the device layout in the laser projection device 100 more compact. Moreover, the integrated substrate 102 also reduces the process of separately processing and assembling the microcavity laser array 101. In addition, the integrated substrate 102 can also eliminate the alignment process of the first microcavity laser array 101a and the second microcavity laser array 101b. As long as the two types of laser units 103 are epitaxially grown at preset positions, the corresponding laser units 103 in the first microcavity laser array 101a and the second microcavity laser array 101b can be converged to the same pixel point after the light combining component 20 combines the light, reducing the alignment difficulty between the microcavity laser arrays 101.

[0137] In some embodiments, the controller may include a first driving circuit. The first driving circuit is electrically connected to the first microcavity laser array 101a and the second microcavity laser array 101b.

[0138] Since the first substrate and the second substrate are an integral structure, that is, the laser units 103 in the first microcavity laser array 101a and the second microcavity laser array 101b are grown on a substrate 102, a first driving circuit can be configured for the first microcavity laser array 101a and the second microcavity laser array 101b, thereby further simplifying the number of devices in the laser projection device 100.

[0139] In some embodiments, the controller may include a second driving circuit. The second driving circuit is electrically connected to the third microcavity laser array 101c.

[0140] By configuring a first driving circuit to simultaneously control the laser units 103 in the first microcavity laser array 101a and the second microcavity laser array 101b, and by using a second driving circuit to control the laser units 103 in the third microcavity laser array 101c, the two driving circuits control the three microcavity laser arrays 101 respectively, thus balancing the efficient driving of the laser units 103 by the controller with the integration and compactness of the driving circuit.

[0141] In some embodiments, the first driving circuit includes a plurality of first sub-driving units arranged in an array. The plurality of first sub-driving units correspond one-to-one with a plurality of laser units 103 in the first microcavity laser array 101a and the second microcavity laser array 101b. Each first sub-driving unit outputs a first sub-driving signal to a corresponding laser unit in the first microcavity laser array 101a or the second microcavity laser array 101b according to a driving signal, so as to adjust the display parameters of the laser unit 103.

[0142] As described above, the driving circuit includes multiple sub-driving units 80 arranged in an array. The first driving circuit includes multiple first sub-driving units arranged along an array, and their array arrangement is the same as that of the laser units 103 in the first microcavity laser array 101a and the second microcavity laser array. Each first sub-driving unit is correspondingly configured with one laser unit 103, and each first sub-driving unit controls the corresponding laser unit 103 to work independently through a first sub-driving signal. The first sub-driving signal can be a current signal or a voltage signal, and the first sub-driving signal can be a signal decoded from the driving signal.

[0143] The first sub-driving unit 80 provides precise driving current or driving voltage to one of the laser units 103 in the first microcavity laser array 101a and the second microcavity laser array according to the first sub-driving signal. Combined with an intelligent algorithm, the pulse width and frequency of the driving current or driving voltage are dynamically adjusted to control the operating parameters and display parameters of each laser unit 103. This allows the first microcavity laser array 101a or the second microcavity laser array 101b to adapt to the changes in each frame of the original digital video signal, thereby achieving high-quality laser image output.

[0144] In some embodiments, the second driving circuit includes a plurality of second sub-driving units arranged in an array. The plurality of second sub-driving units correspond one-to-one with a plurality of laser units 103 in the third microcavity laser array 101c. Each second sub-driving unit outputs a second sub-driving signal to a corresponding laser unit in the third microcavity laser array 101c according to a driving signal, so as to adjust the display parameters of the laser unit 103.

[0145] The second driving circuit includes multiple second sub-driving units arranged along an array, with the array arrangement being the same as that of the laser units 103 in the third microcavity laser array 101c. Each second sub-driving unit corresponds to one laser unit 103 in the third microcavity laser array 101c, and each second sub-driving unit controls the corresponding laser unit 103 to operate independently via a second sub-driving signal. The second sub-driving signal can be a current signal or a voltage signal, and can be a signal decoded from the driving signal.

[0146] The second sub-driving unit 80 provides precise driving current or driving voltage to one of the laser units 103 in the third microcavity laser array 101c according to the second sub-driving signal. Combined with an intelligent algorithm, the pulse width and frequency of the driving current or driving voltage are dynamically adjusted to control the operating parameters and display parameters of each laser unit 103. This allows the third microcavity laser array 101c to adapt to the changes in each frame of the original digital video signal, thereby achieving high-quality laser image output.

[0147] In an embodiment where the first substrate and the second substrate are an integral structure, as shown in FIG14, the light combining component 20 may include a first light combining member 201.

[0148] The first beam combiner 201 can be located on the light output path of the first microcavity laser array 101a. The first beam combiner 201 can reflect the laser beam emitted from the laser unit 103 in the first microcavity laser array 101a, thereby changing the transmission path of the laser beam emitted from the laser unit 103 in the first microcavity laser array 101a. The laser unit 103 in the first microcavity laser array 101a is used to emit a green laser beam.

[0149] The first light combiner 201 can be a dichroic filter. Specifically, the first light combiner 201 is a dichroic filter capable of reflecting a green laser beam.

[0150] In an embodiment where the first substrate and the second substrate are an integral structure, as shown in FIG14, the light combining assembly 20 may include a light combining element 204. The light combining element 204 is located on the light output path of the second microcavity laser array 101b, the third microcavity laser array 101c, and the first light combining element 201.

[0151] The beam combining element 204 can be an X-cube prism. Specifically, the beam combining element 204 is a prism used to reflect blue and red laser beams and transmit green laser beams.

[0152] The light combining element 204 is used to reflect the blue laser beam emitted by the laser unit 103 in the second microcavity laser array 101b and the red laser beam emitted by the laser unit 103 in the third microcavity laser array 101c, and combine them with the blue laser beam reflected by the first light combining element 201 to the same pixel point.

[0153] In some embodiments, the laser projection device 100 may include a first heat dissipation module. Since the first substrate and the second substrate are an integral structure, the first heat dissipation module can be used to dissipate heat from the first microcavity laser array 101a and the second microcavity laser array 101b, thereby reducing the number of heat dissipation modules.

[0154] Optionally, the first heat dissipation module can be a heat sink or a heat pipe, etc., and this application embodiment does not limit this.

[0155] In embodiments where the first substrate and the second substrate are integrally formed, the laser projection device 100 may include a second heat dissipation module. The second heat dissipation module can be used to dissipate heat from the third microcavity laser array 101c, thereby ensuring the heat dissipation efficiency of the three microcavity laser arrays 101.

[0156] In some embodiments, as shown in FIG13, the microcavity laser array 101 further includes a collimating element 60. The collimating element 60 is located on the light output path of each laser unit in the microcavity laser array. Each microcavity laser array may have one collimating element 60.

[0157] The laser beam emitted from the microcavity laser array 101 is primarily a Gaussian spot, with its energy concentrated mainly in the central portion. To improve the optical spread of the laser beam, i.e., the matching degree between the laser beam and the lens 30, a collimating element 60 can be placed along the output path of the microcavity laser array 101 to collimate the laser beam. The collimating element 60 is used to collimate the laser beam emitted from the microcavity laser array 101, thereby adjusting the beam divergence angle and thus adjusting the optical spread of the laser beam, optimizing the performance of the laser projection device 100, and improving the quality of the projected image.

[0158] In some embodiments, the collimating element 60 is a microlens array element. As shown in FIG4, the microlens array element includes a plurality of microlens units 601, and the microlens units 601 are arranged in a one-to-one correspondence with the plurality of laser units 103. In this way, the laser beam emitted by each laser unit 103 can be collimated by the microlens unit 601 to straighten the beam divergence angle.

[0159] It should be noted that, in order to ensure the image quality of the projected image, the beam divergence angle of the laser beam can be maintained between 8° and 11°. Since the specific structure of the microcavity laser array 101 is different, its beam divergence angle is also different. Therefore, it is necessary to adjust its beam divergence angle to the above range through the microlens unit 601.

[0160] For example, if the beam divergence angle of the microcavity laser array 101 is relatively large, such as between 12° and 22°, this relatively large beam divergence angle may lead to uneven beam distribution and excessive beam dispersion, which is detrimental to subsequent optical imaging and thus reduces the imaging quality of the projected image. However, by configuring a microlens unit 601 in front of each laser unit 103, the beam divergence angle of the microcavity laser array 101 can be effectively reduced to the range of 8° to 11°, the beam distribution can become more uniform, and thus improve the imaging quality of the projected image.

[0161] For example, if the beam divergence angle of the microcavity laser array 101 is relatively small, for instance, between 6° and 10°, while this relatively small beam divergence angle is beneficial for beam focusing to some extent, in certain application scenarios, it is still necessary to further expand the beam divergence angle to improve the imaging field of view of the projected image. The microlens unit 601 can effectively amplify the beam divergence angle of the microcavity laser array 101 to the range of 8° to 11°, maintaining the uniformity of the light spot while also meeting the imaging requirements of specific application scenarios.

[0162] In some embodiments, as shown in FIG15, the laser projection device 100 may include a support assembly. The support assembly includes a plurality of supports 40. Each support 40 is used to support a microcavity laser array 101. When the substrate 102 of the first microcavity laser array 101a and the second microcavity laser array 101b is an integral structure, the first microcavity laser array 101a and the second microcavity laser array 101b may share a single support 40.

[0163] In some embodiments, as shown in FIG15, the support 40 may include a carrier portion, the carrier portion including a receiving cavity, and the carrier portion having an open structure. The microcavity laser array 101 is disposed within the receiving cavity, and the laser beam emitted from it can be emitted from the open structure.

[0164] In some embodiments, the support 40 may include a support portion. The support portion is used to support the carrier portion and is movably connected to the carrier portion. The carrier portion can rotate relative to the support portion to adjust the laser normal emission angle of the microcavity laser array 101, and the carrier portion can also move relative to the support portion in the X or Y direction.

[0165] It can be understood that by adjusting the pose of the support, the laser normal emission angle of the microcavity laser array 101 can be adjusted, thereby establishing a correspondence between one laser unit 103 in one microcavity laser array 101 and the laser units 103 in the other two microcavity laser arrays 101. In this way, the laser beams emitted by the three corresponding laser units 103 can be combined by the beam combining component 20 to the same pixel.

[0166] This application also provides a wearable device. The wearable device can be an augmented reality (AR) helmet or virtual reality (VR) helmet, glasses, or other wearable products.

[0167] In some embodiments, the wearable device may include any of the laser projection devices described above.

[0168] The laser projection device includes a laser display component. This laser display component operates on the same principle as the laser display component in the laser projection device provided in the above embodiments, and will not be described again here. Due to the characteristics of the microcavity laser array described above, it can be further miniaturized, thus enabling its application in the wearable device of this embodiment.

[0169] The laser projection device also includes a light combining component and a lens. The placement and operating principle of this light combining component and lens are the same as those in the laser projection device described in the above embodiments, and will not be repeated here. The difference lies in that the light combining component can be further miniaturized when applied to wearable devices.

[0170] In some embodiments, the wearable device may include a wearing body. The wearing body is used to attach the wearable device to a user's head.

[0171] In some embodiments, the wearer may include a lens. Specifically, the lens may be a waveguide lens.

[0172] In some embodiments, the wearable device also includes a camera. The camera is used to capture a first video. The first video can be a video about a real-world environment.

[0173] In some embodiments, the wearable device may include a processing means. The processing means may receive a first video from a camera in response to input from the camera. The processing means may also process the first video into a second video to be displayed to the user; the second video may be an augmented reality video or a virtual reality video. The processing means may also convert the second video into a drive signal in a signal format suitable for controlling the laser display components.

[0174] The laser projection device also includes a controller. This controller operates on the same principle as the controller in the laser projection device provided in the above embodiments, and will not be described again here.

[0175] The controller is electrically connected to the processing unit, thereby enabling it to receive drive signals sent by the processing unit to control the operation of the laser display components.

[0176] In some embodiments, the wearable device may include a light-reflecting element. The light-reflecting element is disposed in the light output path of the laser projection device, and can reflect the target laser image emitted by the laser projection device onto the lens.

[0177] As mentioned earlier, laser display components can serve not only as a light source but also as a display source. The laser image emitted by the laser display component is combined by a beam combiner to form the target laser image, which is the display source for wearable devices. The light from the target laser image can enter the input coupling section of the lens, and then enter the waveguide body of the lens. The laser beam can propagate efficiently within the waveguide body, and then enter the output coupling section of the lens, from which it is emitted to the user's eye.

[0178] Thus, the wearable device provided in this application embodiment achieves high brightness, high definition, and high color fidelity imaging effects by using a laser display component as the display source. Simultaneously, the miniaturized design of the laser display component makes the wearable device compact and lightweight, improving its portability and comfort, making it suitable for prolonged wear.

[0179] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A laser projection device, comprising: Laser display components; The laser display component includes: three sets of microcavity laser arrays, each set of microcavity laser arrays includes multiple laser units, the laser units in the three sets of microcavity laser arrays have a corresponding relationship, and the three sets of microcavity laser arrays are respectively used to generate green laser images, blue laser images and red laser images; A light combining component is disposed on the light emission path of the laser display component; the light combining component is used to combine the laser beams emitted by the corresponding laser units into a single pixel, thereby combining the green laser image, the blue laser image, and the red laser image into a target laser image; A lens, which is disposed on the light output path of the light combining component, receives the target laser image incident on the light combining component and projects a projected image; and a controller, which is electrically connected to the laser display component and is used to receive a drive signal and control the display parameters of each laser unit according to the drive signal.

2. The laser projection device according to claim 1, wherein, The light combining component is also used to reflect and combine the laser beams emitted by the corresponding laser units into a single pixel.

3. The laser projection device according to claim 1 or 2, wherein, The microcavity laser array is one of the following: micro-laser diode array, vertical cavity surface-emitting laser array, resonant cavity light-emitting diode array, edge-emitting laser array, micro-resonant cavity light-emitting diode array, micro-light-emitting diode array, mini light-emitting diode array, quantum dot light-emitting diode array, organic light-emitting diode array, or microscale organic light-emitting diode array.

4. The laser projection device according to claim 1 or 2, wherein, The three sets of microcavity laser arrays include a first microcavity laser array, a second microcavity laser array, and a third microcavity laser array; The light combining component includes: The first beam combiner is located on the light output path of the first microcavity laser array. The first beam combiner is used to reflect the laser beam emitted by the laser unit in the first microcavity laser array. A second beam combiner is located on the light output path of the second microcavity laser array and the first beam combiner. The second beam combiner is used to reflect the laser beam emitted from the laser units in the second microcavity laser array and to transmit the laser beam emitted from the first beam combiner. The third beam combiner is located on the light output path of the third microcavity laser array and the second beam combiner. The third beam combiner is used to reflect the laser beam emitted from the laser unit in the third microcavity laser array and to transmit the laser beam emitted from the second beam combiner.

5. The laser projection device according to claim 4, wherein, The first microcavity laser array, the second microcavity laser array, and the third microcavity laser array are arranged linearly. The first light combining element, the second light combining element, and the third light combining element are arranged linearly and are parallel to each other.

6. The laser projection device according to claim 1 or 2, wherein, The three sets of microcavity laser arrays include a first microcavity laser array, a second microcavity laser array, and a third microcavity laser array; The light combining component includes: The first beam combiner is located on the light output path of the first microcavity laser array. The first beam combiner is used to reflect the laser beam emitted by the laser unit in the first microcavity laser array. A beam combining element is located on the light output path of the second microcavity laser array, the third microcavity laser array, and the first beam combining element. The beam combining element is used to reflect the laser beams emitted from the laser units in the second and third microcavity laser arrays and to transmit the laser beams emitted from the first beam combining element.

7. The laser projection device according to claim 6, wherein, The light combining element is an X-cube prism.

8. The laser projection device according to any one of claims 1 to 7, wherein, In any one of the microcavity laser arrays, the diameter of the laser unit is D1, where D1 satisfies: D1 > 0.7 μm, D1 < 800 μm.

9. The laser projection device according to any one of claims 7, wherein, In any set of the microcavity laser arrays, the distance between the center of each laser unit and the center of an adjacent laser unit in the same row or column is L1, where L1 satisfies: L1 > 1.5 μm, L1 < 1600 μm.

10. The laser projection device according to any one of claims 1 to 7, wherein, In any one of the microcavity laser arrays, Q laser units are arranged into a laser unit combination according to a preset pattern, and multiple laser unit combinations are arranged in an array. The preset pattern is a polygon, and Q is a positive integer ≥3.

11. The laser projection device according to claim 10, wherein, The preset shape is one of a triangle, a square, or a quadrilateral.

12. The laser projection device according to any one of claims 1 to 11, wherein, In any one of the microcavity laser arrays, a plurality of laser units are arranged in M ​​rows and N columns, and the display area of ​​the microcavity laser array contains A rows and B columns of the laser units, where A < M and B < N; The multiple laser units within the display area of ​​the three sets of microcavity laser arrays correspond one-to-one.

13. The laser projection device according to claim 6, wherein, The first microcavity laser array includes a first substrate and a plurality of laser units formed on the first substrate, wherein the laser units in the first microcavity laser array are used to emit green laser beams; The second microcavity laser array includes a second substrate and the plurality of laser units formed on the second substrate, wherein the laser units in the second microcavity laser array are used to emit blue laser beams; The third microcavity laser array includes a third substrate and the plurality of laser units formed on the third substrate. The laser units in the third microcavity laser array are used to emit a red laser beam. The first substrate and the second substrate are integrally formed.

14. The laser projection device according to claim 13, wherein, The controller includes: A first driving circuit is electrically connected to the first microcavity laser array and the second microcavity laser array. The second driving circuit is electrically connected to the third microcavity laser array.

15. The laser projection device according to claim 14, wherein, The first driving circuit includes multiple arrayed first sub-driving units, each of which corresponds one-to-one with multiple laser units in the first microcavity laser array and the second microcavity laser array. Each first sub-driving unit outputs a first sub-driving signal to a corresponding laser unit in the first or second microcavity laser array according to the driving signal, so as to adjust the display parameters of the laser unit. The second driving circuit includes multiple second sub-driving units arranged in an array. Each of the multiple second sub-driving units corresponds one-to-one with a multiple laser unit in the third microcavity laser array. Each second sub-driving unit outputs a second sub-driving signal to a corresponding laser unit in the third microcavity laser array according to the driving signal, so as to adjust the display parameters of the laser unit.

16. The laser projection device according to any one of claims 1 to 15, wherein, The microcavity laser array also includes: A collimating element is located on the light output path of the laser unit in the microcavity laser array, and the collimating element is used to collimate the laser beam.

17. The laser projection device according to claim 16, wherein, The collimating element is a microlens array element, which includes multiple microlens units, each corresponding to one of the multiple laser units, to collimate the laser beam emitted by the laser units.

18. A wearable device, comprising: Wearing body, the wearing body including lenses; A camera is disposed on the wearable body, and the camera is used to capture a first video; A processing device is disposed on the wearable body and connected to the camera, the processing device being used to process the first video into a driving signal; A laser projection device, wherein the laser projection device is any one of claims 1 to 17; the laser projection device is connected to the processing device and displays a target laser image under the control of the driving signal; and A light-reflecting element is disposed on the wearer and located in the light output path of the laser projection device, and the light-reflecting element is used to reflect the target laser image to the lens.

19. The wearable device according to claim 18, wherein, The laser projection device includes: a laser display component, a light combining component, a lens, and a controller; The processing device is connected to the controller.

20. The wearable device according to claim 18 or 19, wherein, The lens includes: An input coupling unit is used to couple the light rays of the target laser image into the waveguide body; Waveguide body, used to propagate incident laser light; and The output coupling section is used to couple the laser propagating in the waveguide body to the user's eye.

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