Augmented reality device assembly method and augmented reality device

Abstract

An augmented reality device assembling method and an augmented reality device. The augmented reality device assembling method comprises the steps of: fixing the position of one of a projection module (20), an optical waveguide (30) and a support (10) in an augmented reality device to be assembled, and arranging the other two relative to it in respective preset positions, so that there is a gap (S1, S2) between a display unit (24) in the projection module (20) and a housing (21), and / or between the optical waveguide (30) and the support (10) for adjusting the relative position therebetween; causing the projection module (20) to project image light; receiving an emergent image coupled out from the optical waveguide (30) and determining whether it meets a preset standard: if not, adjusting the relative position until an optimal relative position is determined that can make the emergent image meet the preset standard; if so, keeping the optimal relative position; and fixing the optimal relative position at least by means of gluing. The assembling method is convenient and efficient to operate, and can effectively improve the quality of the final projected image.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical imaging technology, and in particular to an augmented reality device assembly method and an augmented reality device. BACKGROUND

[0002] Augmented reality (AR) technology includes a light source, a projection lens plus a light waveguide sheet scheme, and a traditional Birdbath scheme. Due to the reasons such as relatively large volume, difficulty in further improving the field of view angle, and relatively poor user experience, the traditional Birdbath scheme is difficult to be favored by consumers, and the light waveguide sheet scheme is more compact and beautiful because only one waveguide sheet is needed in front of the user's eyes, and the user experience is better.

[0003] The scheme using the light waveguide sheet usually includes an optical machine and a light waveguide sheet. The image is projected into the light waveguide sheet by the optical machine, and then the image is projected into the human eye after being expanded by the light waveguide sheet. The image quality projected by the optical machine directly determines the image quality received by the human eye, and the light waveguide sheet also has angle requirements for receiving light when expanding the pupil. The existing technology usually uses a pure physical alignment method to adjust the relative position of the optical machine and the waveguide sheet during assembly, which leads to the fact that the final optical quality is not necessarily the best. Especially, there are cumulative errors in the assembly process of many optical elements such as the optical machine, the light waveguide sheet, and the like, and there are also errors or error accumulation in the processing and manufacturing links of them to some extent. These factors may adversely affect the final projection image quality, thereby causing the image projected into the human eye to be more or less distorted.

[0004] The content described in this section is for the convenience of understanding the present application, and therefore should not be assumed to belong to the prior art only because it is included in this section. SUMMARY

[0005] Therefore, the present application provides an augmented reality device assembly method and an augmented reality device, thereby being able to solve or at least alleviate one or more of the above problems and other aspects.

[0006] First, according to one aspect of the present application, it provides an augmented reality device assembly method, the augmented reality device includes a bracket, a projection module and a light waveguide element, the projection module includes a shell, a light source, a display unit, a light turning unit and a projection lens, the display unit is used to modulate the incident light into image light, the light turning unit is used to turn the light emitted from the light source to the display unit, and the image light modulated by the display unit is turned to the projection lens to project out and then coupled into the light waveguide element, the augmented reality device assembly method includes the steps of:

[0007] One of the projection module, the optical waveguide, and the bracket to be assembled is fixed in position, and the other two are arranged in their respective preset positions relative to it, so that there is a gap between the display unit and the housing, and / or between the optical waveguide and the bracket, for adjusting their relative positions.

[0008] The projection module projects image light.

[0009] The system receives the emitted image coupled from the optical waveguide and determines whether it meets a preset standard. If it does not meet the standard, the relative position is adjusted until an optimized relative position is determined that makes the emitted image meet the preset standard. If it meets the standard, the optimized relative position is maintained.

[0010] The optimized relative positions are fixed at least by means of adhesive application.

[0011] In the augmented reality device assembly method according to the present invention, optionally, the bracket is fixed in position, the optical waveguide is fixed in position relative to the bracket, and the projection module is arranged in its preset position relative to the bracket.

[0012] The emitted image is received at the exit pupil position of the optical waveguide and it is determined whether it meets a first preset standard, thereby adjusting and determining the optimized relative position between the display unit and the housing; and

[0013] The emitted image is received at the exit pupil position and it is determined whether it meets the second preset standard, so as to adjust and determine the optimal relative position between the optical waveguide and the bracket.

[0014] In the augmented reality device assembly method according to the present invention, optionally, the first preset standard includes whether the image quality of the received outgoing image meets preset requirements, and the second preset standard includes whether the brightness of the received outgoing image meets preset image brightness uniformity requirements and whether the angle of the exit pupil light meets preset angle requirements.

[0015] In the augmented reality device assembly method according to the present invention, optionally, the bracket is fixed in position, and the optical waveguide and the projection module are arranged relative to the bracket in their respective preset positions;

[0016] The emitted image is received on the light output path of the optical waveguide, and then it is simultaneously determined whether it meets the respective preset standards of the projection module and the optical waveguide, so as to synchronously adjust and determine the optimized relative position between the display unit and the housing, and the optimized relative position between the optical waveguide and the bracket.

[0017] Optionally, in the augmented reality device assembling method according to the present application, the image light projected by the projection module contains image quality data and image position and angle data, the image quality data includes resolution data, the preset criterion at the projection module includes whether the parameters related to the display unit according to the received image quality data of the outgoing image meet preset requirements, and the preset criterion at the projection module includes whether the image position and angle data of the received outgoing image meet respective preset requirements.

[0018] Optionally, in the augmented reality device assembling method according to the present application, the adjustment amount of the relative position is obtained by calculating the aberration of the received outgoing image, and then the relative position between the display unit and the shell and / or the relative position between the optical waveguide and the support is adjusted in six degrees of freedom in real time according to the adjustment amount.

[0019] Optionally, in the augmented reality device assembling method according to the present application, the augmented reality device assembling method further comprises the following steps:

[0020] One or more prisms are arranged between the projection module and the optical waveguide, for making the image light output by the projection module refract through the prisms and then coupled into the optical waveguide.

[0021] Optionally, in the augmented reality device assembling method according to the present application, a receiving portion is arranged on the outer wall of the shell for receiving the display unit, and a first gap for adjusting the relative position therebetween is formed between the display unit and the outer wall of the shell located outside the receiving portion; and / or

[0022] A receiving space is arranged on the support, and a second gap for adjusting the relative position therebetween is formed between the optical waveguide and the inner wall of the receiving space when the optical waveguide is partially inserted into the receiving space.

[0023] Optionally, in the augmented reality device assembling method according to the present application, the shell is configured to include:

[0024] a first shell connected with the support and provided with at least a first opening portion, and the light source is received in the first shell; and

[0025] a second housing connected to the support and provided with at least a second opening portion and a third opening portion, the second opening portion being configured to be fitted with the first opening portion so that the second housing is detachably and sealingly engaged with the first housing, the light conversion unit being accommodated in the second housing, the projection lens being arranged at the third opening portion and mounted on the second housing, and the accommodating portion being provided on an outer wall of the second housing or the first housing.

[0026] In the augmented reality device assembling method according to the present application, optionally, the housing is configured to include:

[0027] a first housing connected to the support and having a space for accommodating the light source and the light conversion unit, the first housing being provided with at least one opening portion, and the projection lens being mounted at the opening portion; and

[0028] a second housing configured to be detachably and sealingly engaged with the first housing, and the accommodating portion being provided on an outer wall of the second housing.

[0029] In the augmented reality device assembling method according to the present application, optionally, the display unit includes a substrate and a chip attached to the substrate, the display unit is glued to the housing through the substrate, and / or the gluing thickness between the display unit and the housing ranges from 0.1 mm to 0.6 mm.

[0030] In addition, according to another aspect of the present application, it also provides an augmented reality device including:

[0031] a support;

[0032] a projection module mounted on the support and including a housing, a light source, a display unit, a light conversion unit and a projection lens, the display unit being configured to modulate incident light into image light, the light conversion unit being configured to turn light emitted from the light source to the display unit and turn the modulated image light to the projection lens for outward projection; and

[0033] an optical waveguide mounted on the support and coupled with the image light projected from the projection lens,

[0034] wherein a gap for adjusting the relative position between the display unit and the housing, and / or between the optical waveguide and the support is provided, so as to be fixed at an optimized relative position determined during assembly by gluing, and the optimized relative position is determined to be able to make the emergent image coupled out from the optical waveguide during assembly meet a preset standard.

[0035] In the augmented reality device according to the present application, optionally, an accommodating portion for accommodating the display unit is arranged on the outer wall of the shell, and a first gap for adjusting the relative position therebetween is formed between the display unit and the inner wall of the accommodating portion; and / or

[0036] The bracket is provided with an accommodating space, and when the optical waveguide is partially inserted into the accommodating space, a second gap for adjusting the relative position therebetween is formed between the optical waveguide and the inner wall of the accommodating space.

[0037] In the augmented reality device according to the present application, optionally, the shell comprises:

[0038] A first shell connected with the bracket and provided with at least a first opening portion, the light source being accommodated in the first shell; and

[0039] A second shell connected with the bracket and provided with at least a second opening portion and a third opening portion, the second opening portion being configured to be adapted to the first opening portion so that the second shell and the first shell are detachably sealingly engaged, the light conversion unit being accommodated in the second shell, the projection lens being arranged at the third opening portion and mounted on the second shell, and the accommodating portion being arranged on the outer wall of the second shell or the first shell.

[0040] In the augmented reality device according to the present application, optionally, the shell comprises:

[0041] A first shell connected with the bracket and having a space for accommodating the light source and the light conversion unit, the first shell being provided with at least one opening portion, and the projection lens being mounted at the opening portion; and

[0042] A second shell configured to be detachably sealingly engaged with the first shell, and the accommodating portion being arranged on the outer wall of the second shell.

[0043] In the augmented reality device according to the present application, optionally, the display unit comprises a substrate and a chip attached to the substrate, the display unit being glued to the shell through the substrate, and / or the gluing thickness between the display unit and the shell ranges from 0.1 to 0.6 mm.

[0044] In the augmented reality device according to the present application, optionally, a limiting structure matched with a limiting groove and a limiting column is arranged between the shell and the bracket, and / or the shell and the bracket are mounted together at least by gluing.

[0045] In the augmented reality device according to the present application, optionally, at least one side of the optical waveguide is provided with a glue area, and one or more through holes corresponding to the glue area are provided on the support.

[0046] In the augmented reality device according to the present application, optionally, the support comprises:

[0047] a glue overflow part in communication with the gap for accommodating the glue material overflowing from the gap;

[0048] a glue overflow prevention part provided at the edge of the support for preventing the glue material from overflowing from the gap to the optical waveguide; and / or

[0049] a glue adhesion enhancement part provided on the surface of the support opposite to the optical waveguide for increasing the contact area of the glue material between the support and the optical waveguide.

[0050] In the augmented reality device according to the present application, optionally, the support is configured in a split type, comprising a first support and at least one second support independent of each other, the first support being connected with the projection module and the optical waveguide, the second support being connected with at least the optical waveguide, the first support and the second support being respectively located at two sides of the optical waveguide and being respectively spaced apart from the optical waveguide by a first side gap and a second side gap, the first side gap and the second side gap being equal or unequal.

[0051] In the augmented reality device according to the present application, optionally, the augmented reality device further comprises one or more prisms provided between the projection module and the optical waveguide for allowing the image light projected by the projection module to be refracted by the prisms and then coupled into the optical waveguide.

[0052] In the augmented reality device according to the present application, optionally, the preset criteria include whether the image quality of the received exit image meets the preset requirements, whether the light and dark degree meets the preset image brightness uniformity requirements, and whether the angle of the exit pupil light meets the preset angle requirements.

[0053] The present application has simple structure and process, convenient and efficient assembly operation, can effectively avoid the cumulative error of parts in the augmented reality device during assembly process and their error or cumulative error in the processing and manufacturing link, and has adverse effects on the final imaging quality, so as to make the augmented reality device realize high projection image quality, and has high light energy utilization rate and brightness uniformity. The present application has strong practicability and high assembly efficiency, so it is very suitable for large-scale production application, and can significantly improve the quality of augmented reality device. BRIEF DESCRIPTION OF DRAWINGS

[0054] The technical solutions of the present application will be described in further detail below in conjunction with the drawings and embodiments, but it should be understood that these drawings are only illustrated for the purpose of explanation and thus are not necessarily drawn to scale.

[0055] Figure 1 is a flow chart of an embodiment of the assembly method of the augmented reality device according to the present application.

[0056] Figure 2 、 Figure 3 and Figure 4 are three different perspective structural diagrams of the first embodiment of the augmented reality device according to the present application when being assembled.

[0057] Figure 5 is a perspective structural diagram of the first embodiment of the augmented reality device according to the present application after the assembly is completed.

[0058] Figure 6 is a perspective structural diagram of the projection module and a part of the support in the first embodiment of the augmented reality device according to the present application.

[0059] Figure 7 is Figure 6 a perspective structural diagram of the projection module shown in

[0060] Figure 8 and Figure 9 are two perspective structural diagrams of a part of the shell and the light turning unit and the projection lens in the projection module shown in Figure 6

[0061] Figure 10 is Figure 6 a longitudinal side structural diagram of the projection module shown in

[0062] Figure 11 is Figure 6 a transverse side structural diagram of an alternative example of the projection module shown in

[0063] Figure 12 is Figure 2 a top structural diagram of the first embodiment of the augmented reality device shown in

[0064] Figure 13 is a perspective structural diagram of the second embodiment of the augmented reality device according to the present application.

[0065] Figure 14 is Figure 13 ​The top structure schematic diagram of the second embodiment of the augmented reality device is shown, wherein the gap between the optical waveguide and the support and the cemented connection are shown in the B area of the figure. DETAILED DESCRIPTION

[0066] First of all, it should be noted that the steps, components, structure, features and advantages of the augmented reality device assembly method and the augmented reality device according to the present application will be described in an exemplary manner below, however, all the descriptions should not be used to constitute any limitation on the present application. In this document, the technical term "connection (or connected, etc.)" covers the direct connection of a specific component to another component and / or indirect connection to another component, the technical terms "upper", "lower", "right", "left", "vertical", "horizontal" and their derivatives should be related to the orientation in the drawings, and it should be understood that the present application can take various alternative orientations, the technical terms "first", "second" are only used for the purpose of distinguishing description and do not mean to represent their order and relative importance, etc., the technical term "substantially" is intended to include non-substantial errors associated with the measurement of a specific amount, for example, including a range of ±8%, ±5% or ±2% for a specific value, etc.

[0067] In addition, for any single technical feature described or implied in the embodiments herein, or any single technical feature shown or implied in the drawings, the present application still allows any combination or deletion between these technical features (or their equivalents) to continue without any technical obstacles, thereby covering more embodiments according to the present application. In addition, for the sake of brevity, the same or similar parts and features may only be indicated in one or more places in the same drawing, and general matters known to those skilled in the art, such as various assembly tools, industrial cameras, visual alignment devices, etc. that can be used in the assembly of augmented reality devices, are not described in detail herein.

[0068] According to the design idea of the present application, first of all, an assembly method for an augmented reality device is provided, which can effectively reduce or even eliminate the adverse effects of the cumulative errors of the components during processing, manufacturing, assembly, etc. on the projection image quality of the augmented reality device, thereby significantly improving the performance of the projection image quality, light energy utilization and brightness uniformity, etc. Specifically, first of all, a general process of an embodiment of the augmented reality device assembly method according to the present application is exemplarily shown in Figure 1 In addition, several specific examples of the augmented reality device according to the present application are shown in Figures 2-14 The technical solutions of the present application will be described in detail below through these embodiments.

[0069] Please refer to Figure 1 and refer to other drawings Figures 2-14The augmented reality device embodiment shown in this example assembly method can be assembled using steps S11 to S16 to form an augmented reality device, for example, having a support 10, a projection module 20, and a waveguide 30. In this augmented reality device, the projection module 20 may include a housing 21, a light source 22, a light-converting unit 23, a display unit 24, and a projection lens 25. The light-converting unit 23 is used to convert the light emitted from the light source 22 to the display unit 24, which then modulates the incident light into image light, which is then sent to the projection lens 25 for magnification before entering the waveguide 30. The waveguide 30 then expands the pupil before projecting the image onto the viewer's eye. The projection module 20 is fixed to the support 10. This invention does not limit the specific structure, size, or materials used in the projection module 20 and the support 10, nor does it limit the specific method of assembling them together (such as screwing, gluing, laser welding, or any combination thereof).

[0070] like Figure 1 As shown, in step S11, any one of the bracket 10, projection module 20, and waveguide 30 (e.g., the bracket) can be fixed in position first. Then, the other two components are arranged in their respective preset positions relative to the fixed component, thereby forming a preliminary relative positional relationship between the bracket 10, projection module 20, and waveguide 30. This creates a gap S1 between the display unit 24 in the projection module 20 and the housing 21, which can be used to adjust their relative positions (see [reference]). Figure 10 , Figure 11 ), and / or there is a gap S2 between the optical waveguide 30 and the bracket 10 that can be used to adjust the relative position between the two (see Figure 12 , Figure 14 The following section will provide a more detailed explanation of the specific situations regarding the two types of gaps mentioned above.

[0071] Next, in step S12, image light can be projected using the projection module 20. As described above, the light source 22 in the projection module 20 can be turned on, and then the image light is processed by the light conversion unit 23, the display unit 24, and the projection lens 25 before being projected outward onto the optical waveguide 30. Figure 5 As shown, the optical waveguide 30 is typically provided with a coupling-in region 31 and a turning and coupling-out region 32. The coupling-in region 31 is used to receive the image light projected by the projection module 20, so that it is transmitted in the optical waveguide 30 and then coupled out from the turning and coupling-out region 32 after two-dimensional pupil expansion.

[0072] For example Figure 3 and Figure 4As shown, the image receiving device 50 can be used instead of the human eye to receive the exit image coupled out from the light waveguide 30 on the side of the human eye. The image receiving device 50 can generally be an industrial camera, and the specific parameters thereof are selected in relation to the augmented reality device to be assembled, and it is desired to simulate the human eye as much as possible by means of the industrial camera, such as generally requiring an entrance pupil to be front-mounted, a higher resolution, a field of view angle greater than that of the augmented reality device, and a distance between the industrial camera and the light waveguide 30 arranged to be 1 cm-2 cm (simulating the human eye distance), etc.

[0073] In step S13, the imaging condition of the received exit image can be judged and analyzed to determine whether it meets the preset standard. If it is found that the received exit image does not meet the preset standard after the judgment and analysis, since the gaps S1 and / or S2 have been reserved in the previous steps, the relative positions between the above components can be adjusted in real time in step S14 by means of the operational space provided by the above gaps, for example, the adjustment mode can include six-axis adjustment operation (i.e., translation in the X / Y / Z axis direction, and rotation around the X / Y / Z axis direction), until it is determined that the currently received exit image has met the preset standard, thereby determining the optimized relative position between the display unit 24 and the housing 21 and / or the optimized relative position between the light waveguide 30 and the bracket 10.

[0074] Then, the optimized relative position determined by the above process can be maintained in step S15 to be fixed in the subsequent steps, and the above maintenance operation can be achieved by means of the assembly tool used in the assembly process. The above real-time adjustment process can be completed only once or twice, and of course, it can be necessary to undergo more operations to meet the requirements.

[0075] It is to be noted that the preset criteria are not subject to any specific limitation in the present application, but are allowed to be selected and flexibly set according to different application requirements, for example, only one criterion can be selected, or two or more criteria can be combined. For example, in the case of image receiving by the image receiving device 50, the received exit image can be compared with a preset reference image (for example, a cross image, a dot matrix or any other suitable image, which can be set on the camera lens of the image receiving device 50 or generated in the received image using software) serving as a comparison reference, and if the positional relationship between the two can be determined to be aligned, it can be determined that the image quality of the current exit image meets the desired requirements. For example, after a cross image is projected from the projection module 20, the cross image after the action of the optical waveguide 30 is received by the image receiving device 50, and then the relative positional relationship between the two cross images is identified and determined. When the two cross images fail to align, the direction and / or size of adjustment can be determined, and then the corresponding relative position is adjusted (for example, rotation around the X-axis and / or Y-axis, translation along the Z-axis, etc.) by means of the adjustment space provided by the gap S1 or S2, until the two cross images align, thereby ensuring that the augmented reality device has high projection image quality.

[0076] For another example, as an optional case, the preset criteria can also be whether the brightness of the exit image received by the image receiving device 50 meets the preset image brightness uniformity requirement, whether the angle of the exit pupil light meets the preset angle requirement, etc. For example, when the brightness of the received exit image does not meet the uniformity requirement, the corresponding relative position can be adjusted by means of the adjustment space provided by the gap S1 or S2, for example, real-time calibration in the six degrees of freedom directions of the X-axis, Y-axis, Z-axis, XOY plane, YOZ plane, and XOZ plane, until the brightness of the received exit image meets the expected target of brightness uniformity, for example, thereby enabling the augmented reality device to have high brightness uniformity.

[0077] In addition, in some embodiments, the relative position can be adjusted based on the above-mentioned image alignment criterion first, and then the position can be adjusted again based on the above-mentioned brightness criterion. Of course, the preset criteria in the present application are allowed to include any other suitable content without departing from the spirit of the present application.

[0078] As Figure 1As shown, by performing the above steps S11 to S15, the optimized relative position between the display unit 24 and the housing 21 and / or the optimized relative position between the optical waveguide 30 and the support 10 can be determined, and then in step S16, the optimized relative positions between the above components can be fixed, for example, by applying glue in part or all of the gap S1 and / or the gap S2, so as to fasten them together, thereby completing the assembly of the augmented reality device according to the present application.

[0079] The above merely exemplarily introduces the general processing steps of the method of the present application, and it should be understood that in different application scenarios, the method of the present application can be flexibly implemented according to specific needs, and thus allows to provide more implementation manners according to actual application situations, and is not intended to be limited to the above mentioned method steps.

[0080] For example, in some embodiments, for example Figure 2 and Figure 3 As shown, it can be considered to first fix the position of the support 10, then fix the position of the optical waveguide 30 relative to the support 10, and arrange the projection module 20 in its preset position relative to the support 10. Then, as Figure 3 and Figure 4 As shown, the exit image can be received at the exit pupil position of the optical waveguide 30 using the image receiving device 50, and it is determined whether it meets the first preset standard (for example, whether the image quality of the received exit image at this time meets the preset requirement, etc.), so as to thereby adjust and determine the optimized relative position between the display unit 24 and the housing 21. Then, the exit image can continue to be received at the exit pupil position using the image receiving device 50, and it is determined whether it meets the second preset standard (for example, whether the light and dark degree of the received exit image at this time meets the preset image brightness uniformity requirement, whether the angle of the exit pupil light meets the preset angle requirement, etc.), so as to thereby adjust and determine the optimized relative position between the optical waveguide 30 and the support 10, and Figure 5 An embodiment of the augmented reality device after the assembly is completed is shown in a schematic manner in

[0081] In the above adjustment process, the relative position of the display unit 24 is first actively adjusted, and then the relative position of the light waveguide 30 is actively adjusted. Since the light waveguide 30 only diffuses and transmits light, it has no effect on image quality (aberration), so even if the light waveguide 30 is only placed in a preset position, the adjustment operation of the display unit 24 can still be implemented by arranging the image receiving device 50 at the exit pupil position of the light waveguide 30. After the optimal relative position of the display unit 24 is determined, the optimal relative position of the light waveguide 30 is adjusted and determined, so that the desired goals such as brightness uniformity under different fields of view and the angle of the exit pupil light can be achieved.

[0082] In the above manner, since the display unit 24 and the light waveguide 30 are both placed in a preset position and then actively calibrated, the assembly of the three components of the support 10, the projection module 20, and the light waveguide 30 can be completed on one work station, and the image receiving device 50 does not need to be moved, so that the assembly efficiency and precision can be effectively improved. In contrast, if the display unit 24 is actively calibrated without placing the light waveguide 30 in its preset position, the image receiving device 50 needs to be placed in the light path of the projection lens 25, and when the light waveguide 30 is actively calibrated, the image receiving device 50 needs to be placed in the light path of the light waveguide 30, so the operation is complicated and inconvenient. In addition, when the image receiving device 50 does not need to be arranged in the light path of the projection lens 25, the support 10 does not need to be opened or notched in the light path of the projection lens 25, so that problems such as light leakage and increased processing cost can be avoided.

[0083] For example, in some embodiments, the bracket 10 can be first fixed in position, and then the light waveguide 30 is arranged in its preset position relative to the bracket 10, and the projection module 20 is also arranged in its preset position relative to the bracket 10. Then, the image receiving device 50 can be used to receive the outgoing image on the light exit path of the light waveguide 30, and then it is determined whether the preset criteria at the projection module 20 and the preset criteria at the light waveguide 30 are met synchronously, so that the optimal relative position between the display unit 24 and the housing 21 and the optimal relative position between the light waveguide 30 and the bracket 10 can be adjusted and determined synchronously. That is, after processing the information contained in the projected image, data for actively adjusting the display unit 24 and data for actively adjusting the light waveguide 30 can be obtained. Alternatively, the image light projected from the projection module 20 can be arranged to contain not only image quality data (such as resolution data that can be resolved from, for example, black and white line pairs, black and white squares, etc.), but also image position and angle data such as a cross-line image, and the two types of data information are separated from each other on the image. Thus, during the adjustment operation, the adjustment information for adjusting the display unit 24 and the light waveguide 30 can be obtained by projecting a single image, thereby significantly improving the adjustment efficiency.

[0084] Corresponding to the above, the preset criteria at the projection module 20 can be whether the parameters related to the display unit 24 obtained from the image quality data contained in the received outgoing image meet the preset requirements, and the preset criteria at the projection module 20 can be whether the image position and angle data contained in the received outgoing image meet the respective preset requirements.

[0085] Depending on different application cases, both the gap S1 and the gap S2 discussed above can be provided in the method of the present application, or only the gap S1 or the gap S2 can be provided. In some embodiments according to the method of the present application, when the relative position adjustment operation is performed by means of the gap S1 (or the gap S2), the adjustment amount of the relative position can be obtained by calculating, for example, the aberration of the outgoing image received by the image receiving device 50, and then the relative position between the display unit 24 and the housing 21 (or the relative position between the light waveguide 30 and the bracket 10) is adjusted in, for example, six degrees of freedom in real time according to the calculated adjustment amount until the received image meets the preset criteria, thereby enabling the adjustment operation to be more accurate and the assembly efficiency to be higher.

[0086] For the gap S1, the following specific examples are given in Figures 6 to 11 For example, in the case of the gap S1, the following specific examples are given in Figures 6 to 10In the shown example, a receiving portion 218 can be arranged on the outer wall of the housing 21 of the projection module 20 to receive the display unit 24, and a gap S1 can be formed between the display unit 24 and the outer wall of the housing 21 outside the receiving portion 218 during assembly, so that the gap S1 can be used to provide a space for active adjustment of the display unit 24, that is, the position of the display unit 24 can be actively calibrated from the outside of the housing 21 very conveniently and quickly, and after the adjustment operation is completed, the optimized position of the display unit 24 after being determined can be fixed by arranging adhesive material at the gap S1. Another advantage of the above-mentioned active calibration method for the display unit 24 is that the rotation operation of the display unit 24 can make the projection image enter the human eye or the image receiving device 50 to remain horizontal and vertical.

[0087] In the embodiments mentioned herein, the display unit 24 is optionally arranged to have two parts, i.e. a substrate 241 and a chip 242 (such as an LCOS chip, a DMD chip, etc.) attached thereto, wherein the substrate 241 can be made of ceramic or metal to have greater strength and heat dissipation performance. When the display unit 24 is fixed to the adjustment tool by clamping or suction, the ceramic or metal substrate with greater strength will not be easily deformed. The substrate 241 can further include a layer of circuit board to form electrical connection with the chip 242.

[0088] During assembly, the display unit 24 and other components (such as the support 10 or the light guide 30) can be fixed in relative positions by gluing the substrate 241 to the housing 21. As an optional case, the gluing thickness between the display unit 24 and the housing 21 is in the range of 0.05-1mm, for example, in the case of high optical axis consistency of each optical component, the gluing thickness can be in the range of 0.1-0.6mm. That is to say, after the active adjustment and determination of the optimized relative position relationship between the display unit 24 and the housing 21, there can be gaps with different thicknesses between the chip 242 and the housing 21 along the length of the contact surface, so that the adhesive material at different positions can have different thicknesses, but by adjusting the tilt angle of the chip 242, the adhesive material can have a linear thickness at least in part of the gluing area. In addition, in the case of determining the positions of the light turning unit 23 and the display unit 24 by machine vision recognition, the display unit 24 can be glued to the second housing 212 after the adhesive material is arranged thereon, and the gluing thickness can be in the range of 0.01-0.1mm. In addition, as an optional case, when the display unit 24 is fixed by the adhesive material, the final gluing part can be formed in a ring shape, so as to better seal the internal space of the housing 21 and avoid the entry of unwanted stray light, dust, etc. into the housing.

[0089] As for the housing 21 of the projection module 20, it can have any suitable structure as desired, for example, it can be in a unitary structure, or in a split structure composed of multiple parts. Please refer to Figures 6 to 10 The housing 21 can be optionally configured to have two parts, i.e. a first housing 211 and a second housing 212, to accommodate and carry the constituent parts. Specifically, the first housing 211 can be provided with an opening 213 to place the light source 22 in the first housing 211 via the opening 213; as for the second housing 212, it can be in an optional hexahedral structure as a whole, can be provided with openings 214 and 215, and the opening 214 can be configured to be adapted to the opening 213, for example, the concave part 217 and the convex part 216 are optionally provided at the opening 214 and the opening 213 respectively and match each other, so as to detachably seal the second housing 212 and the first housing 211 together to avoid light leakage.

[0090] The light conversion unit 23 will be placed in the second housing 212 to receive the input light from the light source 22 in the first housing 211 and output it to the projection lens 25, which can be in the form of, for example, a PDS prism, a TIR prism, etc., and the projection lens 25 will be mounted on the second housing 212 and arranged at the opening 215, which can be achieved by any feasible connection means, such as threaded connection, fixing by adhesive material after alignment by machine vision, clamping by limiting structure (for example, in the form of limiting groove and limiting column matching each other) and then fixing by adhesive material, etc., and other parts such as the light source 22, the light conversion unit 23, etc. can be fixed in the same or similar way as described above. Although the above figure shows that the accommodating part 218 is provided at the second housing 212, it should be pointed out that the present application also allows the accommodating part 218 to be provided on the outer wall of the first housing 211, for example, only need to rotate the light conversion unit 23 by 90 degrees to cooperate. The first housing 211 and the second housing 212 with the above parts will be connected with the bracket 10, for example, an optional connection means is shown in Figure 7 , i.e. the first housing 211 and / or the second housing 212 can be fixed to the bracket 10 by coating adhesive material on the groove structure 14, for example, on the bracket 10.

[0091] As another exemplary example, for example Figure 11 ​As shown, the housing 21 can be configured to have a first housing 211' and a second housing 212', the former is connected with the support 10 after assembly and provides a space for accommodating the light source 22 and the light conversion unit 23, one or more opening portions can be provided on the first housing 211' according to actual needs, and the projection lens 25 is arranged at one of the opening portions, while the second housing 212' is configured to be engaged with the first housing 211' to form a cover plate-like form, and the accommodating portion 218 can be arranged on the outer wall of the second housing 212'. With the above structure, the light source 22, the light conversion unit 23 and the like can be installed in the same structure by means of insertion or limiting, so that the alignment step can be omitted to improve the assembly efficiency, and since these optical elements are installed in the same structure, they have high optical axis consistency.

[0092] For the gap S2, Figure 12 and Figure 14 corresponding specific examples are given. As an example, the accommodating space 11 can be provided on the support 10, and when the optical waveguide 30 is partially inserted into the accommodating space 11, the gap S2 can be formed between the optical waveguide 30 and the inner wall of the accommodating space, thereby providing a space for position adjustment operation of the optical waveguide 30 (for example, two, three, four, five degrees of freedom can be adjusted, or active calibration is performed on six degrees of freedom of Y axis, X axis, Z axis, YOX plane, YOZ plane, YOZ plane), and after the optimal relative position between the optical waveguide 30 and the support 10 is determined, the position between them can be fixed, for example, by applying the adhesive material 60 in part or all of the gap S2.

[0093] In some embodiments of the method according to the present application, when the gluing operation is performed, this can be specifically realized by the glue applying area 33 (the specific shape, size and layout thereof can be flexibly set according to specific circumstances) provided at a suitable position on one side or both sides of the optical waveguide 30, and one or more through holes 12 (the specific number, shape, size and layout thereof can also be selected and set) provided on the support 10 corresponding to the above-mentioned glue applying area 33, so that after the optimal relative position between the optical waveguide 30 and the support 10 is determined, the adhesive material 60 can be very conveniently applied to the glue applying area 33 of the optical waveguide 30 via the through hole 12 and the gap S2, so that the optical waveguide 30 and the support 10 can be fixed together as described above. In addition, in some embodiments, the method of the present application also allows the gluing operation to be performed from one or two side portions, top and / or bottom and the like of the accommodating space 11 which communicates with the gap S2. Of course, in other embodiments, it is also possible to use the above-mentioned gluing operation modes in combination.

[0094] In consideration of facilitating the gluing operation, the present application allows various possible structural optimization designs of the support 10 in the augmented reality device. For example, as an optional case, the support 10 can be configured to have an adhesion enhancement portion, an anti-overflow portion, and / or an overflow portion. For the adhesion enhancement portion, it can be provided on the surface of the support 10 opposite to the optical waveguide 30 so as to increase the adhesion contact area between them to improve the connection strength. By way of example, the outer contour shape of the adhesion enhancement portion can be configured to include, but not limited to, for example, a continuous triangular / sawtooth-shaped protrusion, a rectangular protrusion, a circular-arc-shaped protrusion, or a combination thereof. For another example Figure 12 and Figure 14 As shown in the respective partial enlarged portions of A and B in FIGS. 13 and 14, the overflow portion 13 is provided in communication with the gap S2 so as to accommodate the excess adhesive material that can overflow from the gap S2, which in practical applications can be configured in a groove-like or other suitable shape. For the anti-overflow portion, it can be provided at the edge position of the support 10 so as to prevent the adhesive material 60 from possibly overflowing from the gap S2 to the optical waveguide 30, thereby avoiding the contamination of the optical region of the optical waveguide 30.

[0095] In addition, as an optional case, the present application also allows the support 10 to be configured in a split structure, i.e., it will include a body portion and an additional portion, which are separated from each other and respectively provided on both sides of the optical waveguide 30 in communication therewith, and are respectively spaced apart from the optical waveguide 30 by a first side gap and a second side gap, which can be equal or not equal. In addition, it can be understood that the above-mentioned additional portion can be provided with two, three or more in practical applications, which can be very beneficial in some cases. In addition, the additional portion can be further connected to the body portion by a suitable structural connection means such as a screw. By using the above split structure, the double-sided gluing can be more convenient and flexible, thereby effectively balancing the adverse effects of the possible deformation of the adhesive material 60 after curing on the optical waveguide 30, so as to facilitate the incident light to form a suitable coupling-in angle with the surface of the optical waveguide 30 to obtain the best exit image quality.

[0096] For the adhesive material mentioned herein, the present application method does not make special limitations on its specific type, curing method, etc. The adhesive material can use any suitable adhesive material, such as UV glue, heat-curing glue, UV-heat-curing glue, or other types of adhesive materials that use natural light or moisture, etc. In addition, in the case where the adhesive material has been used to achieve the connection, the present application method also allows considering the additional application of one or more other connection methods, which can include, but not limited to, screwing, magnetic connection, etc.

[0097] Depending on the component composition of the augmented reality device itself, the method of the present invention allows for a wider range of possible implementations. As an example, for instance... Figure 13 and Figure 14 As shown, when assembling this augmented reality device, one or more prisms 40 can be optionally mounted between the projection module 20 and the optical waveguide 30. These prisms 40 refract the light output from the projection module 20 before coupling it into the optical waveguide 30. This allows the projection module 20 and the optical waveguide 30 to be arranged in parallel, resulting in a more compact overall structure for the augmented reality device. Alternatively, the prisms 40 and the support 10 can be pre-connected using any suitable limiting structure, such as matching limiting grooves and limiting posts, and can be fixed to the support 10 using suitable methods such as adhesive bonding. Furthermore, in an optional configuration, the method of the present invention also allows the projection module 20 to be arranged on the same side of the optical waveguide 30 as the receiving position of the emitted image, or to be arranged on opposite sides.

[0098] Furthermore, according to the design concept of the present invention, an augmented reality device is also provided. This augmented reality device may include a support, a projection module, and an optical waveguide assembled as a single unit. A gap may be provided between the optical waveguide and the support, and / or between the display unit in the projection module and the housing. During the assembly of the support, projection module, and optical waveguide, an optimized relative position between the optical waveguide and the support (and / or between the display unit and the housing) can be adjusted and determined by determining whether the emitted image projected through the projection module and the optical waveguide meets a preset standard. This optimized relative position is then fixed, at least by applying adhesive within the aforementioned gaps, thereby assembling the augmented reality device according to the present invention.

[0099] exist Figures 2 to 14 Different embodiments of augmented reality devices, namely augmented reality device 100 and augmented reality device 200, have been described separately. As an example, in augmented reality device 100, the projection module 20 and the support 10 can be arranged along the X-axis and Y-axis respectively to form a vertical layout, with a double-sided gap between the optical waveguide 30 and the support 10; in augmented reality device 200, the projection module 20 and the support 10 can both be arranged along the Y-axis to form a parallel layout, with a double-sided gap between the optical waveguide 30 and the support 10 as well.

[0100] It should be noted that the augmented reality device according to the present application can also adopt more configurations, for example, a single-sided gap can be provided between the optical waveguide 30 and the support 10, or the support 10 can be provided in a split structure, and a double-sided gap is still provided between the support 10 and the optical waveguide 30. Unless otherwise specified, the features or structures with the same reference numerals in these different embodiments are the same or similar to each other. Since the composition, structural configuration, assembly and advantages of these augmented reality device embodiments have been described in detail in the foregoing introduction of the method of the present application, the specific description of the corresponding part can be directly referred to, and will not be repeated here.

[0101] As mentioned above, in the technical solution according to the present application, the inventors have considered that the relative positions between the components in the augmented reality device to be assembled can be actively adjusted based on preset standards, so that the adverse effects of the individual errors or cumulative errors of the projection module, the optical waveguide, the support and its constituent components in the manufacturing, processing, assembly and other links on the final projection image can be effectively avoided, so that the problems of the prior art such as the existence of process errors in the grating engraving of the optical waveguide, the deformation of the glue used in the assembly causing the angle deviation of the incident light when entering the optical waveguide, the existence of larger assembly errors of the numerous optical elements in the projection module during the installation process, etc. can be solved. The distortion of the projection image when reaching the human eye, the reduction of the efficiency of the optical waveguide for light transmission, the poor brightness uniformity and other problems can be solved.

[0102] Finally, it should be noted that although the adhesion method is also used to assemble the components such as the optical waveguide and the support in some existing augmented reality devices, and due to the volume of the adhesive material, a gap is passively present in the bonding area in appearance, as discussed above, these existing augmented reality devices do not pay attention to the fact that the input light cannot form a projection image with good imaging quality, light energy utilization, brightness uniformity and other characteristics after being emitted through the projection module, the optical waveguide and the like due to many possible reasons, especially under mass production conditions. By detecting the existing augmented reality device products that have been made, it can be found that they cannot be mass-produced like the augmented reality device of the present application because the entire system path from the input light of the light source to the final projection image output by the optical waveguide can be optimized, so that augmented reality device products with good imaging quality, light energy utilization, brightness uniformity and other characteristics can be stably and reliably mass-produced. By performing the above detection, the significant difference between the augmented reality device of the present application and the existing augmented reality device can be found, and the outstanding advantages of the present application over the prior art can be fully understood.

[0103] The above detailed description of the augmented reality device assembly method and the augmented reality device according to the present application is only by way of example and is intended to illustrate the principles of the present application and its implementation, and is not intended to limit the present application, and various modifications and improvements can be made by those skilled in the art without departing from the spirit and scope of the present application. For example, although the light waveguide sheet in the augmented reality device is generally in the form of a sheet structure, the light waveguide member in the present application also allows any suitable structure other than this, such as other shapes formed locally, for example, bumps. Therefore, all equivalent technical solutions shall fall within the scope of the present application and be limited by the claims of the present application.

Claims

1. A method for assembling an augmented reality device, the augmented reality device comprising a support, a projection module, and an optical waveguide, the projection module comprising a housing, a light source, a display unit, a light-converting unit, and a projection lens, the display unit being used to modulate incident light into image light, the light-converting unit being used to redirect light emitted from the light source to the display unit, and redirect the image light modulated from the light source to the projection lens for outward projection and coupling into the optical waveguide, and then projecting the image light into a human eye after pupil dilation by the optical waveguide, characterized in that... Including the following steps: One of the projection module, the optical waveguide, and the bracket to be assembled is fixed in position, and the other two are arranged in their respective preset positions relative to it, so that there is a gap between the display unit and the housing, and / or between the optical waveguide and the bracket, for adjusting their relative positions. The projection module projects image light. The system receives the emitted image coupled from the optical waveguide at the human eye side and determines whether it meets a preset standard. If it does not meet the standard, the system adjusts the relative position until an optimized relative position is determined that makes the emitted image meet the preset standard. If it does meet the standard, the system maintains the optimized relative position. as well as The optimized relative position is fixed at least by adhesive application, wherein a receiving portion is provided on the outer wall of the housing to accommodate the display unit, and a first gap is formed between the display unit and the outer wall of the housing located outside the receiving portion for adjusting their relative position; and / or A receiving space is provided on the bracket, and when the optical waveguide is partially inserted into the receiving space, a second gap is formed between the optical waveguide and the inner wall of the receiving space for adjusting their relative position.

2. The augmented reality device assembly method according to claim 1, wherein: The bracket is fixed in position, and the optical waveguide is fixed in position relative to the bracket. The projection module is arranged in its preset position relative to the bracket. The emitted image is received at the exit pupil position of the optical waveguide and it is determined whether it meets the first preset standard, so as to adjust and determine the optimized relative position between the display unit and the housing. as well as The emitted image is received at the exit pupil position and it is determined whether it meets the second preset standard, so as to adjust and determine the optimal relative position between the optical waveguide and the bracket.

3. The augmented reality device assembly method according to claim 2, wherein, The first preset standard includes whether the image quality of the received emitted image meets preset requirements, and the second preset standard includes whether the brightness of the received emitted image meets preset image brightness uniformity requirements and whether the angle of the exit pupil light meets preset angle requirements.

4. The augmented reality device assembly method according to any one of claims 1-3, wherein: The bracket is fixed in position, and the optical waveguide and the projection module are arranged in their respective preset positions relative to the bracket; The emitted image is received on the light output path of the optical waveguide, and then it is simultaneously determined whether it meets the respective preset standards of the projection module and the optical waveguide, so as to synchronously adjust and determine the optimized relative position between the display unit and the housing, and the optimized relative position between the optical waveguide and the bracket.

5. The augmented reality device assembly method according to any one of claims 1-3, wherein, The image light projected by the projection module includes image quality data as well as image position and angle data. The image quality data includes resolution data. The preset standard at the projection module includes whether the parameters related to the display unit obtained from the image quality data of the received emitted image meet preset requirements. The preset standard at the projection module includes whether the image position and angle data of the received emitted image meet their respective preset requirements.

6. The augmented reality device assembly method according to any one of claims 1-3, wherein, The adjustment amount of the relative position is obtained by calculating the aberration of the received outgoing image, and then the relative position between the display unit and the housing, and / or the relative position between the optical waveguide and the bracket are adjusted in real time in six degrees of freedom.

7. The augmented reality device assembly method according to any one of claims 1-3, wherein, The augmented reality device assembly method further includes the following steps: One or more prisms are disposed between the projection module and the optical waveguide, so that the image light output from the projection module is refracted by the prisms and then coupled into the optical waveguide.

8. The method for assembling an augmented reality device according to any one of claims 1-3, wherein, The housing is configured to include: A first housing, connected to the bracket, and having space for accommodating the light source and the light-converting unit, the first housing having at least one opening, at which the projection lens is mounted; and The second housing is configured to be detachably and sealingly joined to the first housing, and the receiving portion is disposed on the outer wall of the second housing.

9. The method for assembling an augmented reality device according to any one of claims 1-3, wherein, The display unit includes a substrate and a chip attached to the substrate. The display unit is bonded to the housing via the substrate, and / or the adhesive thickness between the display unit and the housing is in the range of 0.1-0.6 mm.

10. An augmented reality device comprising: support; The projection module is mounted on the bracket and includes a housing, a light source, a display unit, a light-converting unit, and a projection lens. The display unit is used to modulate incident light into image light, and the light-converting unit is used to deflect the light emitted from the light source to the display unit and deflect the image light it modulates to the projection lens for outward projection. as well as An optical waveguide, mounted on the bracket and coupled to the image light projected from the projection lens. The feature is that a gap is provided between the display unit and the housing, and / or between the optical waveguide and the bracket, for adjusting their relative positions, so as to fix them at an optimized relative position determined during assembly, at least by adhesive application, wherein the optimized relative position is determined such that the emitted image coupled from the optical waveguide received during assembly conforms to a preset standard, wherein the outer wall of the housing is provided with a receiving portion for accommodating the display unit, and a first gap for adjusting their relative positions is formed between the display unit and the inner wall of the receiving portion; and / or The bracket is provided with a receiving space. When the optical waveguide is partially inserted into the receiving space, a second gap is formed between the optical waveguide and the inner wall of the receiving space for adjusting their relative positions.

11. The augmented reality device according to claim 10, wherein, The housing includes: A first housing, connected to the bracket, and having space for accommodating the light source and the light-converting unit, the first housing having at least one opening, at which the projection lens is mounted; and The second housing is configured to be detachably and sealingly joined to the first housing, and the receiving portion is disposed on the outer wall of the second housing.

12. The augmented reality device according to claim 11, wherein, The display unit includes a substrate and a chip attached to the substrate. The display unit is bonded to the housing via the substrate, and / or the adhesive thickness between the display unit and the housing is in the range of 0.1-0.6 mm.

13. The augmented reality device according to claim 11, wherein, A limiting structure matching the limiting groove and the limiting post is provided between the housing and the bracket, and / or the housing and the bracket are assembled together at least by adhesive application.

14. The augmented reality device according to claim 11, wherein, The optical waveguide has an adhesive application area on at least one side, and the bracket has one or more through holes corresponding to the adhesive application area.

15. The augmented reality device according to claim 11, wherein, The support includes: An overflow section, which is connected to the gap, is used to contain adhesive material overflowing from the gap; An overflow prevention section, located at the edge of the bracket, is used to prevent adhesive material from overflowing from the gap onto the optical waveguide; and / or An adhesive reinforcement portion is disposed on the surface of the bracket and the optical waveguide opposite to each other, for increasing the contact area of ​​the adhesive material between the bracket and the optical waveguide.

16. The augmented reality device according to claim 11, wherein, The bracket is configured as a split type, comprising a first bracket and at least one second bracket that are independent of each other. The first bracket is connected to the projection module and the optical waveguide, and the second bracket is connected to at least the optical waveguide. The first bracket and the second bracket are located on opposite sides of the optical waveguide and are respectively separated from the optical waveguide by a first side gap and a second side gap. The first side gap and the second side gap may be equal or unequal.

17. The augmented reality device according to claim 11, wherein, The augmented reality device further includes one or more prisms disposed between the projection module and the optical waveguide, for refracting the image light projected by the projection module through the prisms before coupling it into the optical waveguide.

18. The augmented reality device according to claim 11, wherein, The preset standards include whether the image quality of the received emitted image meets preset requirements, whether the brightness meets preset image brightness uniformity requirements, and whether the angle of the exit pupil light meets preset angle requirements.

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