Image display system, display apparatus, and method of assembling image display system

Abstract

The present application provides an image display system, comprising: a display for emitting image light; the optical waveguide is positioned on a light path of the image light and is used for guiding the image light out to the range of an eye box so as to display an image; the assembling mechanism comprises a first assembling assembly and a second assembling assembly, the first assembling assembly is used for assembling and positioning the display in a detachable mode, the second assembling assembly is fixedly connected to the surface of the optical waveguide, and the first assembling assembly and the second assembling assembly are fixedly connected with each other; therefore, the relative position of the display and the optical waveguide is kept constant. The invention further provides a display device and an assembling method of the image display system.

Description

Technical Field

[0001] This application relates to image display technology, and particularly to an image display system, a display device including the image display system, and an assembly method of the image display system. Background Art

[0002] An augmented reality (AR) glasses includes an optical engine and an optical waveguide. The optical engine and the optical waveguide need to be precisely aligned and assembled, but the current assembly method has problems such as insufficient assembly strength, high cost, and affecting imaging quality. Summary of the Invention

[0003] Based on this, it is necessary to provide an assembly component, an image display system, and an AR glasses to improve the above problems of insufficient assembly strength, high cost, and affecting imaging quality.

[0004] In the first aspect of this application, an image display system is provided, including: a display for emitting image light; an optical waveguide located on the optical path of the image light for guiding the image light to an eyebox range to display an image; and an assembly mechanism including a first assembly component and a second assembly component, the first assembly component is used to assemble and position the display in a detachable manner, the second assembly component is fixedly connected to the surface of the optical waveguide, and the first assembly component and the second assembly component are fixedly connected to each other to jointly maintain the relative positions of the display and the optical waveguide constant.

[0005] In the second aspect of this application, a display device is provided, including: a frame; and the image display system as described above, the image display system is fixedly connected to the frame.

[0006] In the third aspect of this application, an assembly method of an image display system is provided, including: assembling and positioning a micro-display in a detachable manner into a first assembly component, the micro-display is used to emit image light; fixedly connecting a second assembly component to the surface of the optical waveguide; and aligning and connecting the micro-display with the second assembly component to jointly maintain the relative positions of the micro-display and the optical waveguide constant, so that the optical waveguide is located on the optical path of the image light for guiding the image light to an eyebox range to display an image.

[0007] The above image display component, AR glasses and the assembly method of the image display component. The microdisplay and the optical waveguide are indirectly fixed through the assembly mechanism. The surfaces of the first assembly component and the second assembly component can be used for large-area dispensing, which is beneficial to improving the bonding strength, thereby improving the shear strength and tensile strength between the microdisplay and the optical waveguide. Dispensing is not directly performed at the edge of the microdisplay, which can avoid glue overflow from blocking the image light and is beneficial to improving the image quality. The microdisplay is detachably connected to the first assembly component. Even if the optical test fails after assembly, the microdisplay can be reused subsequently, which is beneficial to cost control. Description of the Drawings

[0008] Figure 1 Schematic perspective view of the display device according to an embodiment of the present application.

[0009] Figure 2 For Figure 1 Partial front view of the image display system in

[0010] Figure 3 For Figure 2 Schematic diagram of the positional relationship between the microdisplay and the optical waveguide in

[0011] Figure 4 For Figure 2 Schematic cross-sectional view of

[0012] Figure 5 For Figure 2 Exploded view of the assembly mechanism in

[0013] Figure 6 Schematic perspective view of the mounting member and the microdisplay.

[0014] Figure 7 Top view of the mounting member and the microdisplay.

[0015] Figure 8 Schematic disassembled view of the first assembly component and the microdisplay.

[0016] Figure 9 Schematic plan view of the fixing member and the double-sided tape.

[0017] Figure 10 Schematic view of a structure of the bottom surface and the mounting surface.

[0018] Figure 11 Schematic view of another structure of the bottom surface and the mounting surface.

[0019] Figure 12 Schematic view of yet another structure of the bottom surface and the mounting surface.

[0020] Figure 13 Flowchart of the steps of the assembly method of the image display system according to an embodiment of the present application.

[0021] Figure 14 It is a schematic diagram of a partial three-dimensional structure of an image display system in a comparative example.

[0022] Figure 15 It is a schematic diagram of a test image collected in a comparative example.

[0023] Figure 16 It is a schematic diagram of a test image collected in an embodiment of the present application.

[0024] Description of main component symbols Display device: 100; Image display system: 101, 102; Frame: 103; Microdisplay: 10; Display surface: 11; Optical waveguide: 20; Waveguide layer: 21; First surface: 211; Second surface: 212; Side surface: 213; Coupling grating: 22; Assembly mechanism: 30; First assembly component: 31; Mounting member: 311; Bolt: 312; Bottom surface: 313; Top surface: 314; Side surface: 315; Mounting hole: 316; Threaded hole: 317; Protrusion: 318; First protrusion: 319; Second assembly component: 32; Fixing member: 321; Fixing part: A; Mounting surface: 322; Connecting surface: 323; Positioning part: B; Light guiding opening: 324; Positioning hole: 325; Positioning pin post: 326; Groove: 327; Second protrusion: 328; Glue layer: 33; Double-sided adhesive layer: 34; Light engine: 200; Waveguide structure: 300; Adhesive layer: 400; Image light: L1; Ambient light: L2; Test images: P1, P2; Interference pattern: P11; Steps: S1, S2, S3, S4, S5, S6.

[0025] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. Specific embodiments

[0026] Please refer to Figure 1 , the display device 100 in the embodiment of the present application is an AR glasses. When the user wears the display device 100 on the head, the user's eyes can receive the image light L1 projected by the display device 100, so as to observe the projected image. At the same time, the ambient light L2 in the real environment where the user is located can also transmit through the display device 100 and enter the human eye, so that the human eye can also observe the image of the real world. The image of the real world is combined with the projected image displayed by the display device 100, and the human eye can observe the projected image superimposed on the image of the real world, that is, the AR image.

[0027] The display device 100 includes image display systems 101 and 102 that are basically the same in structure and function. The display device 100 further includes a frame 103, and the image display systems 101 and 102 are respectively installed in two installation positions of the frame 103. The image display system 101 corresponds to the left lens and is used to image for the user's left eye; the image display system 102 corresponds to the right lens and is used to image for the user's right eye. In at least one embodiment, the polarization directions of the image light projected by the image display systems 101 and 102 onto the human eyes are different, so that the human eyes can observe a stereoscopic image effect.

[0028] The following takes the image display system 101 as an example to describe its structure and function.

[0029] Please refer to Figure 2 , the image display system 101 includes a microdisplay 10, an optical waveguide 20, and an assembly mechanism 30. The microdisplay 10 is used to emit image light L1. The optical waveguide 20 is located on the optical path of the image light L1 and is used to conduct the image light L1 and project the image light L1 into the eye box of the user for imaging. The assembly mechanism 30 is respectively connected to the microdisplay 10 and the optical waveguide 20 and is used to assemble and position the relative positional relationship between the microdisplay 10 and the optical waveguide 20, so that the image light L1 emitted by the microdisplay 10 enters from a specific position of the optical waveguide 20.

[0030] The size of the microdisplay 10 generally does not exceed 3 inches. The microdisplay 10 can be a micro light-emitting diode (Micro LED) microdisplay, a display based on digital light processing (DLP) technology, a liquid crystal on silicon (LCoS) display, etc. The image light L1 emitted by the microdisplay 10 can include light beams in three bands of red, green, and blue to present a color image.

[0031] The optical waveguide 20 ( Figure 2Without showing the specific structure inside the optical waveguide 20, only showing the structural and positional relationships between the overall structure of the optical waveguide 20 and the microdisplay 10 and the assembly mechanism 30), it may include a waveguide layer and an input grating and an output grating located on the surface of the waveguide layer. The image light L1 emitted by the microdisplay 10 undergoes multiple total internal reflections alternately between two relatively spaced surfaces of the waveguide layer to propagate from the input grating towards the output grating and finally be coupled out from the output grating to the eye box range. The input grating and the output grating may be respectively disposed on two different surfaces of the waveguide layer or may be spaced apart on the same surface of the waveguide layer. The image light L1 may be incident from the side of the surface of the waveguide layer where the input grating is disposed or may be incident from the side away from the surface of the waveguide layer where the input grating is disposed. The waveguide layer may include materials such as optical glass and optical resin. The input grating and the output grating may be, for example, surface relief gratings or holographic volume gratings.

[0032] By providing the assembly mechanism 30, the microdisplay 10 is fixedly connected to the optical waveguide 20 and the relative positions are constant. Specifically, the microdisplay 10 is disposed in the input region of the optical waveguide 20. Please refer to Figure 3 , the optical waveguide 20 may include a waveguide layer 21 and an input grating 22 disposed on the waveguide layer 21. The input region is defined as the region where the positive projection of the input grating 22 on the waveguide layer 21 is located. In at least one embodiment, the microdisplay 10 is disposed in the input region of the optical waveguide 20, which means that the positive projection of the display surface 11 of the microdisplay 10 on the optical waveguide 20 is completely covered by the input region.

[0033] Please also refer to Figure 4 ( Figure 4 is Figure 2 a schematic cross-sectional structure diagram of the image display system 101, where the cross-section passes through the axes of two bolts 312 and is perpendicular to the optical waveguide 20) and Figure 5 , the assembly mechanism 30 includes a first assembly component 31 and a second assembly component 32. The first assembly component 31 is used to assemble and position the microdisplay 10 in a detachable manner, and the second assembly component 32 is fixedly connected to one surface of the optical waveguide 20. The first assembly component 31 and the second assembly component 32 are fixedly connected to each other to jointly keep the relative positions of the microdisplay 10 and the optical waveguide 20 constant, thereby ensuring the image quality.

[0034] The first assembly component 31 includes a mounting member 311 and bolts 312. The mounting member 311 is used to accommodate the microdisplay 10, and the bolts 312 are used to lock the microdisplay 10 to the mounting member 311.

[0035] The mounting member 311 has a bottom surface 313, a top surface 314, and a side surface 315. The bottom surface 313 and the top surface 314 are opposite and spaced apart, and the side surface 315 is respectively connected to the edges of the bottom surface 313 and the top surface 314. The bottom surface 313 faces the optical waveguide 20, and the bottom surface 313 is located between the top surface 314 and the optical waveguide 20.

[0036] The mounting member 311 is provided with a mounting hole 316 and a threaded hole 317. The mounting hole 316 passes through the bottom surface 313 and the top surface 314, and the threaded hole 317 passes through the side surface 315 and is connected to the mounting hole 316. The micro display 10 is located in the mounting hole 316, and the bolt 312 is tightened in the threaded hole 317 to lock the micro display 10 on the mounting member 311.

[0037] Please also read Figure 6 , Figure 7 and Figure 8 The microdisplay 10 has a circular outer contour, and the mounting hole 316 is adaptively set as a circular hole. The microdisplay 10 has a display surface 11 for emitting image light L1. When the microdisplay 10 is located in the mounting hole 316, the display surface 11 is arranged toward the optical waveguide 20, and the end where the display surface 11 is located protrudes from the mounting hole 316.

[0038] Two threaded holes 317 are provided on the mounting member 311, and the first assembly component 31 includes two bolts 312. The two threaded holes 317 correspond to the two bolts 312 one by one. The two threaded holes 317 are symmetrically distributed in the circumferential direction. Each bolt 312 is screwed into a corresponding threaded hole 317. Each threaded hole 317 extends perpendicularly to the side 315, so that when the two bolts 312 are screwed into the two threaded holes 317, they vertically support the microdisplay 10 from two directions to fix the microdisplay 10. When the two bolts 312 are unscrewed, the microdisplay 10 can be removed from the mounting member 311. That is, the first assembly component 31 is installed and positioned in a detachable manner.

[0039] In at least one embodiment of the present application, the threaded holes 317 and the bolts 312 may be other numbers (greater than 2), and the two numbers may be the same and correspond one to one. When the threaded holes 317 are other numbers, the threaded holes 317 are evenly distributed on the circumference so that the micro display 10 is evenly stressed in all directions.

[0040] Please also refer to Figure 2 , Figure 3 and Figure 4 The second assembly component 32 includes a fixing member 321. The fixing member 321 has a mounting surface 322 and a connecting surface 323 that are opposite and spaced apart. The mounting surface 322 is fixedly connected to the bottom surface 313 of the fixing member 311, and the connecting surface 323 is fixedly connected to the optical waveguide 20.

[0041] The fixing member 321 is formed with a light guiding opening 324 that penetrates through the mounting surface 322 and the connecting surface 323. The light guiding opening 324 is arranged corresponding to the mounting hole 316, and the part of the micro display 10 protruding from the mounting hole 316 is engaged in the light guiding opening 324. The light guiding opening 324 being arranged corresponding to the mounting hole 316 specifically means that the orthographic projections of the centers of the light guiding opening 324 and the mounting hole 316 on the optical waveguide 20 coincide; that is, the connection line between the centers of the light guiding opening 324 and the mounting hole 316 is perpendicular to the optical waveguide 20.

[0042] The assembling mechanism 30 further includes an adhesive layer 33. The adhesive layer 33 is located between the bottom surface 313 of the mounting member 311 and the mounting surface 322 of the fixing member 321, and the adhesive layer 33 is annular, surrounding the periphery of the light guiding opening 324 and the micro display 10. The adhesive layer 33 is in direct contact with the bottom surface 313 and the mounting surface 322, and is used to fixedly connect the mounting member 311 and the fixing member 321.

[0043] The assembling mechanism 30 further includes a double-sided adhesive layer 34. The double-sided adhesive layer 34 is located between the connecting surface 323 of the fixing member 321 and the optical waveguide 20, and the double-sided adhesive layer 34 is annular (see Figure 9 ), surrounding the periphery of the light guiding opening 324 and the micro display 10. The double-sided adhesive layer 34 is in direct contact with the connecting surface 323 and the optical waveguide 20, and is used to fixedly connect the fixing member 321 and the optical waveguide 20.

[0044] In at least one embodiment, one or both of the mounting member 311 and the fixing member 321 are non-light-transmitting materials, such as black plastics: acrylonitrile-butadiene-styrene copolymer (ABS), polyethylene (PE); the adhesive layer 33 is a black non-light-transmitting material. In this way, it is beneficial to avoid the influence of external ambient light incidence on the image light.

[0045] In at least one embodiment, one or both of the inner walls of the mounting hole 316 and the inner wall of the light guiding opening 324 are subjected to light extinction treatment. The light extinction treatment is physical light extinction or chemical light extinction. Physical light extinction includes but is not limited to sandblasting, laser, mechanical polishing, special structure design, etc., and chemical light extinction includes but is not limited to adding light extinction agents, coatings, chemical etching, etc. In this way, when the micro display 10 is lit for testing, the influence of light scattering and reflection can be effectively reduced.

[0046] Please refer to Figure 2 , define the surface of the optical waveguide 20 where the micro display 10 is arranged as the first surface 211. The optical waveguide 20 further includes a second surface 212 and a side surface 213. The second surface 212 is arranged parallel and spaced apart from the first surface 211. The side surface 213 is perpendicularly connected to the edges of the first surface 211 and the second surface 212.

[0047] Please refer to Figure 2 , Figure 4 and Figure 5 . The fixing member 321 has a fixing portion A and a positioning portion B. The fixing portion A and the positioning portion B are integrally formed. The fixing portion A is the part of the fixing member 321 located on the first surface 211, and the mounting surface 322 and the connecting surface 323 are the surfaces of the fixing portion A.

[0048] The positioning portion B extends outward from the edge of the fixing portion A. Specifically, the positioning portion B extends in a plane parallel to the side surface 213. The second assembly component 32 further includes a positioning pin post 326. A positioning hole 325 is formed on the positioning portion B (see Figure 9 ). A positioning pin post (not shown in the figure) that cooperates with the positioning hole 325 is formed on the spectacle frame 103 (see Figure 1 ). By positioning and coupling the positioning hole 325 and the positioning pin posts on the spectacle frame 103 in one-to-one correspondence, the fixing member 321 can be positioned at a preset position on the spectacle frame 103. The extension trajectory of the positioning portion B is consistent with at least part of the contour of the spectacle frame 103, so that at least part of the contour of the spectacle frame 103 passes through each positioning hole 325 in sequence. In addition, the positioning pin post 326 can also be used to meet the mechanical positioning requirements of external sensors or cameras and other additional electronic components, improving the alignment accuracy and efficiency.

[0049] Please refer to Figure 10 . In at least one embodiment, at least one of the bottom surface 313 of the mounting member 311 and the mounting surface 322 of the fixing member 321 is non-planar. In this way, the contact area between the glue layer 33 between the bottom surface 313 and the mounting surface 322 and the bottom surface 313 and / or the mounting surface 322 is increased, which is beneficial to improving the bonding strength.

[0050] For example Figure 10 in the shown embodiment, the bottom surface 313 is planar, while the mounting surface 322 is non-planar. Specifically, a plurality of hemispherical grooves 327 are formed on the mounting surface 322 at intervals. In this way, compared with the mounting surface 322 being set as a plane, Figure 10 in the shown embodiment, the contact area between the glue layer 33 and the mounting surface 322 is larger, and the bonding between the mounting member 311 and the fixing member 321 is more firm.

[0051] Please refer to Figure 11, in at least one embodiment, both the bottom surface 313 and the mounting surface 322 are non-planar. In this embodiment, in addition to a plurality of hemispherical grooves 327 spaced apart from each other being formed on the mounting surface 322, a plurality of protrusions 318 spaced apart from each other and protruding toward the mounting surface 322 are further formed on the bottom surface 313. The number of grooves 327 and protrusions 318 is the same and they correspond to each other one by one. A corresponding groove 327 and a protrusion 318 are adapted to each other in shape. A corresponding groove 327 and a protrusion 318 are adapted to each other in shape. For example Figure 11 in the illustrated embodiment, both the groove 327 and the protrusion 318 are hemispherical. In the emission direction of the image light L1, each protrusion is disposed opposite to a corresponding groove. That is, the orthographic projections of a corresponding groove 327 and a protrusion 318 on the mounting member 311 or the fixing member 321 completely coincide or partially coincide. In other embodiments, the mounting surface 322 may form protrusions while the bottom surface 313 forms grooves. It is sufficient that one of the bottom surface 313 and the mounting surface 322 forms protrusions and the other forms grooves. In other embodiments, the groove 327 and the protrusion 318 may also be other adapted / same shapes.

[0052] Please refer to Figure 12 , in at least one embodiment, both the bottom surface 313 and the mounting surface 322 are non-planar and both form a plurality of protrusions / serrations. Specifically, Figure 12 in the illustrated embodiment, a plurality of first protrusions 319 in the shape of truncated cones spaced apart from each other are formed on the bottom surface 313, and a plurality of second protrusions 328 in the shape of truncated cones spaced apart from each other are formed on the mounting surface 322. The plurality of first protrusions 319 and the plurality of second protrusions 328 are arranged alternately. That is, the top end of each first protrusion 319 (except for the outermost first protrusion 319) extends into the space between two adjacent second protrusions 328, and the top end of each second protrusion 328 (except for the outermost second protrusion 328) extends into the space between two adjacent first protrusions 319.

[0053] In addition, in the case where the requirement for alignment accuracy is relatively low, Figure 11 the mutually fitting design of the groove 327 and the protrusion 318 in the illustrated embodiment, Figure 12 the mutually meshing design of the first protrusion 319 and the second protrusion 328 in the illustrated embodiment, can both be used for mechanically positioning the fixing member 321 and the mounting member 311 without optical positioning.

[0054] Please refer to Figure 13 , the present application further provides an assembling method for the above image display system 101 / 102, including: Step S1, assembling and positioning the micro display to the first assembling component in a detachable manner, where the micro display is used for emitting image light; Step S2, fixedly connecting the second assembly component to the surface of the optical waveguide; and Step S3, aligning and connecting the microdisplay with the second assembly component to jointly maintain a constant relative position between the microdisplay and the optical waveguide, such that the optical waveguide is located on the optical path of the image light.

[0055] Please refer to Figure 3 , in Step S1, place the microdisplay 10 in the mounting hole 316 of the mounting member 311, and screw two bolts 312 into the corresponding threaded holes 317 respectively until the two bolts 312 abut and fasten the microdisplay 10. In this way, the microdisplay 10 and the first assembly component 31 together form the upper half of the image display system 101.

[0056] In Step S2, fixedly connect the fixing member 321 to the surface of the optical waveguide 20 through the double-sided tape 34; wherein, the fixing member 321 can be first positioned and fixed at a preset position on the frame through the positioning hole 325. In this way, the optical waveguide 20 and the second assembly component 32 together form the lower half of the image display system 101.

[0057] Among them, the above step numbers in the present application do not constitute a limitation on the sequence of steps. For example, in other embodiments, the sequence of Step S1 and Step S2 can be exchanged.

[0058] In Step S3, align the above-mentioned "upper half" and "lower half" optically or mechanically, such that one end of the microdisplay 10 close to the optical waveguide 20 is engaged in the light guiding opening 324 of the fixing member 321, and the coupling-in region of the optical waveguide 20 is located on the optical path of the image light L1, such that the image light L1 can be smoothly coupled into the optical waveguide 20.

[0059] In Step S3, also apply glue between the bottom surface 313 of the mounting member 311 and the mounting surface 322 of the fixing member 321 to form a glue layer 33 for adhesively fixing the mounting member 311 and the fixing member 321.

[0060] In at least one embodiment, after Step S3, it further includes: Step S4, turn on the microdisplay 10 to emit the image light L1; set a camera in the coupling-out region of the optical waveguide 20 (the region corresponding to the coupling-out grating in the optical waveguide 20) to receive the image light L1, generate a test image based on the image light L1 emitted by the image display system 101 at this time, detect the display quality of the test image (such as including contrast, brightness, brightness uniformity, color uniformity, etc.), and determine whether the display quality meets the preset requirements.

[0061] If the judgment in step S4 meets the preset requirements, then step S5 is executed to cure the glue layer 33 between the first assembly component 31 and the second assembly component 32. If the judgment in step S4 does not meet the preset requirements, then step S6 is executed: disassemble the micro display from the first assembly component, and disassemble the second assembly component from the optical waveguide. Specifically, step S6 includes: unscrew the bolt 312 from the threaded hole 317 to remove the micro display 10, and tear the double-sided tape 34 to remove the fixing member 321 on the optical waveguide 20. In this way, both the micro display 10 and the optical waveguide 20 can be easily disassembled and reused in the next assembly alignment process.

[0062] Please refer to Figure 14 , in a proportionality, the light engine 200 and the waveguide structure 300 are directly bonded through the glue layer 400 provided on the peripheral edge of the light engine, so that their relative positions are kept fixed.

[0063] First, the contact area between the glue layer 400 provided on the peripheral edge of the light engine and the light engine 200 and the waveguide structure 300 is small, resulting in insufficient shear strength and tensile strength between the light engine 200 and the waveguide structure 300, and the relative position relationship between them is easily damaged after assembly. In the embodiment of the present application, the micro display 10 and the optical waveguide 20 are indirectly fixed through the assembly mechanism 30, and the glue layer 33 can be coated on the entire surface of the mounting surface 322 of the fixing member 321 and the bottom surface 313 of the mounting member 311. The contact area between the glue layer 33 and the mechanism parts is increased, which can effectively improve the bonding strength, thereby improving the shear strength and tensile strength between the micro display 10 and the optical waveguide 20.

[0064] Second, in the proportionality, the glue directly contacts the optical products (the light engine 200 and the waveguide structure 300). If the subsequent optical test fails, the light engine 200 and the waveguide structure 300 can only be scrapped and cannot be reworked, increasing the material cost and the rework process cost. In the embodiment of the present application, the micro display 10 is detachably connected to the first assembly component 31, the second assembly component 32 is detachably connected to the spectacle frame, and the bonding strength of the double-sided adhesive layer 34 between the fixing member 321 and the optical waveguide 20 is limited and can be easily torn. This enables the micro display 10 and the optical waveguide 20 to be reused even if the optical test fails after assembly, which is beneficial to cost control.

[0065] Third, in the proportionality, glue is directly applied at the edge of the light output port of the light engine 200, and the glue is likely to overflow to the light output port of the light engine / the light input end of the optical waveguide, blocking the picture and affecting the final imaging effect. In the embodiment of the present application, the glue is located between the fixing member 321 and the mounting member 311, and one end of the micro display 10 where the display surface 11 is located extends into the light guiding opening 324 of the fixing member 321, which can effectively prevent the glue from overflowing into the display surface 11 and blocking the output of the image light, which is beneficial to improving the imaging effect.

[0066] Fourthly, in the comparative example, the use of transparent glue causes light leakage, resulting in external ambient light interfering with the image light, or multiple reflections and refractions of the light of the light engine 200 causing stray light, which affects the imaging quality. However, in the embodiments of the present application, the fixing member 321, the mounting member 311 and the glue layer 33 are all light-shielding materials, and the inner walls of the fixing member 321 and the mounting member 311 are both subjected to light extinction design, which can effectively avoid the interference of ambient light and stray light and improve the imaging quality. As Figure 15 shown in the test image P1 without light extinction treatment, the brightness uniformity thereof is 24% (the brightness uniformity obtained by the ANSI-9 test method), and there are obvious interference patterns P11 in the test image. As Figure 16 shown in the test image P2 after light extinction treatment, the brightness uniformity thereof reaches 43.17% (the brightness uniformity obtained by the ANSI-9 test method).

[0067] In summary, the display device 100, the image display system 101 / 102 and the assembly method of the image display system according to the embodiments of the present application can effectively improve the assembly strength, reduce the assembly cost and improve the image quality, which is beneficial to solving the technical problems of insufficient assembly strength, high cost and low imaging quality in the prior art.

[0068] Those of ordinary skill in the art of the present technology should recognize that the above embodiments are only used to illustrate the present application, rather than to limit the present application. As long as within the scope of the essential spirit of the present application, appropriate changes and variations made to the above embodiments fall within the scope of protection required by the present application.

Claims

1. An image display system, characterized in that: include: A micro display for emitting image light; An optical waveguide, located on the optical path of the image light, and used to guide the image light to the eye box range to display an image; as well as The assembly mechanism includes a first assembly component and a second assembly component, wherein the first assembly component is used to assemble and position the micro display in a detachable manner, and the second assembly component is fixedly connected to the surface of the optical waveguide. The first assembly component and the second assembly component are fixedly connected to each other to jointly maintain a constant relative position between the micro display and the optical waveguide.

2. The image display system according to claim 1, wherein: The first assembly component includes a mounting member and a bolt; The mounting member has a bottom surface, a top surface and side surfaces, the bottom surface is opposite to the top surface and is spaced apart, and the side surfaces are respectively connected to the edges of the bottom surface and the top surface; The mounting member is further provided with a mounting hole and a threaded hole, wherein the mounting hole passes through the bottom surface and the top surface, and the threaded hole passes through the side surface and is connected to the mounting hole; The micro display is located in the mounting hole, and the bolt is located in the threaded hole, and is used to lock the micro display on the mounting member.

3. The image display system according to claim 2, wherein: The second assembly component includes a fixing member, the fixing member is formed with a light guide opening, the light guide opening is arranged corresponding to the mounting hole, and one end of the micro display close to the optical waveguide is engaged in the light guide opening.

4. The image display system according to claim 3, characterized in that: The mounting piece and / or the fixing piece are made of non-light-transmitting material.

5. The image display system according to claim 3, characterized in that: The assembly mechanism further includes a glue layer, which is located between the mounting member and the fixing member, and surrounds the light guide opening. The glue layer is used to fix the mounting member and the fixing member.

6. The image display system as claimed in claim 5, characterized in that The fixing member has a mounting surface arranged toward the mounting member, and the bottom surface is fixedly connected to the mounting surface through the glue layer.

7. The image display system according to claim 6, characterized in that: The bottom surface and / or the mounting surface are non-planar.

8. The image display system according to claim 7, characterized in that: When both the bottom surface and the mounting surface are non-planar, one of the bottom surface and the mounting surface forms a plurality of protrusions spaced apart from each other, and the other forms a plurality of grooves spaced apart from each other; The plurality of protrusions correspond to the plurality of grooves one by one, and in the emission direction of the image light, each protrusion is arranged opposite to a corresponding groove.

9. The image display system according to claim 7, characterized in that: When both the bottom surface and the mounting surface are non-planar, a plurality of first protrusions spaced apart from each other are formed on the bottom surface, and a plurality of second protrusions spaced apart from each other are formed on the mounting surface, and the plurality of first protrusions and the plurality of second protrusions are arranged alternately.

10. The image display system according to claim 5, characterized in that: The glue layer is made of non-light-transmitting material.

11. The image display system according to claim 3, characterized in that: The mounting hole and the inner wall of the opening are subjected to matte treatment.

12. The image display system according to any one of claims 1 to 11, characterized in that: The assembly mechanism further includes a double-sided adhesive layer, which is disposed between the second assembly component and the optical waveguide and is used for fixedly connecting the second assembly component and the optical waveguide.

13. A display device, characterized in that: include: Frames; as well as The image display system according to any one of claims 1 to 12, wherein the image display system is fixedly connected to the mirror frame.

14. The display device according to claim 13, characterized in that The second assembly component includes a fixing member and a positioning pin, and the positioning pin is used for externally connecting an electronic component.

15. The display device according to claim 14, characterized in that A positioning hole is provided on the edge of the fixing piece, and the positioning hole is used to couple with a positioning pin on the mirror frame.

16. A method for assembling an image display system, characterized in that: include: Assembling and positioning a microdisplay in a detachable manner into a first assembly component, wherein the microdisplay is used to emit image light; Fixedly connecting the second assembly component to the surface of the optical waveguide; as well as The microdisplay is aligned with the second assembly component to jointly maintain a constant relative position between the microdisplay and the optical waveguide, so that the optical waveguide is located on the optical path of the image light and is used to guide the image light to the eye box range to display an image.

17. The method for assembling an image display system according to claim 16, wherein: After the step of aligning and connecting the first assembly component and the second assembly component, the method further includes: Turning on the microdisplay and capturing a test image; If the test image does not meet the preset requirements, the micro display is removed from the first assembly component, and the second assembly component is removed from the optical waveguide.

18. The method for assembling an image display system according to claim 17, wherein: The step of aligning and connecting the first assembly component and the second assembly component comprises: Dispensing glue between the first assembly component and the second assembly component to form a glue layer; If the test image meets the preset requirements, the glue layer is cured.

Images