Assembly method and device of optical system and augmented reality equipment

Abstract

The invention provides an assembling method and device of an optical system and augmented reality equipment. Specifically, the assembling method comprises the following steps: arranging the waveguide sheet on the bracket; the lens unit is arranged at a preset position; the position of the screen module is adjusted, so that emergent light of the screen module can enter the waveguide sheet through the lens unit and form a virtual image; monitoring the virtual image; and in response to determining that the virtual image meets a second preset condition, assembling the screen module at the corresponding position on the bracket, thereby achieving the technical effects of reducing the assembling error and reducing the influence of the manufacturing error on the display effect of the optical system.

Description

Technical Field

[0001] The present disclosure relates to the field of extended reality technology, and in particular to an assembly method and device of an optical system and an extended reality device. Background Art

[0002] Extended Reality (XR) refers to the combination of reality and virtuality through computers to create a virtual environment for human-computer interaction. It is also a general term for various technologies such as augmented reality (AR), virtual reality (VR), and mixed reality (MR). It is mainly used in virtual reality, smart wearable devices, education, and medical fields. Among them, the core of AR technology is to integrate virtual elements into the real world, which requires the use of an optical system that can superimpose virtual elements in the user's field of view. Summary of the invention

[0003] In view of this, the purpose of the present disclosure is to provide an assembly method and device of an optical system and an extended reality device.

[0004] Based on the above purpose, in a first aspect, an embodiment of the present disclosure provides an assembly method of an optical system, wherein the optical system includes a screen module, a lens unit, a bracket, and a waveguide sheet; the assembly method includes:

[0005] placing the waveguide plate on the bracket;

[0006] Setting the lens unit at a preset position;

[0007] Adjusting the position of the screen module so that the outgoing light of the screen module can pass through the lens unit, enter the waveguide sheet and form a virtual image;

[0008] monitoring the virtual image;

[0009] In response to determining that the virtual image satisfies a second preset condition, the screen module at the corresponding position is assembled to the bracket.

[0010] In a second aspect, an embodiment of the present disclosure provides an assembly device for an optical system, wherein the optical system includes a screen module, a lens unit, a bracket, and a waveguide sheet; the assembly device includes:

[0011] A support module, used for supporting the bracket;

[0012] A screen clamp, used to fix the screen module;

[0013] An adjustment module, used for adjusting the position of the screen fixture to change the position of the screen module, so that the outgoing light of the screen module can pass through the lens unit and enter the waveguide sheet to form a virtual image;

[0014] An image acquisition unit, used for acquiring the virtual image;

[0015] The processing unit is used to control the adjustment module to adjust the position of the screen module according to the acquired virtual image and the second preset condition.

[0016] In a third aspect, an embodiment of the present disclosure provides an extended reality device, comprising an optical system obtained by the assembly method described in the first aspect.

[0017] From the above, it can be seen that the assembly method, apparatus and extended reality device of the optical system provided by the present disclosure set the waveguide plate on the bracket; set the lens unit at a preset position; adjust the position of the screen module so that the outgoing light of the screen module can pass through the lens unit into the waveguide plate and form a virtual image; monitor the virtual image; in response to determining that the virtual image meets the second preset condition, assemble the screen module at the corresponding position to the bracket, thereby achieving the technical effect of reducing assembly errors and reducing the impact of manufacturing errors on the display effect of the optical system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present disclosure or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic diagram showing the structure of an extended reality device provided by an embodiment of the present disclosure is shown;

[0020] Figure 2A A schematic diagram of the structure of an optical system provided by an embodiment of the present disclosure is shown;

[0021] Figure 2B Show Figure 2A Exploded diagram of the optical system;

[0022] Figure 2C A schematic diagram showing the structure of a screen module provided by an embodiment of the present disclosure is shown;

[0023] Figure 3 A schematic structural diagram of an assembly device for an optical system provided by an embodiment of the present disclosure is shown;

[0024] Figure 4 A partial structural schematic diagram of an assembly device for an optical system provided by an embodiment of the present disclosure is shown;

[0025] Figure 5A A schematic structural diagram of a screen clamp provided by an embodiment of the present disclosure is shown;

[0026] Figure 5B A schematic structural diagram of a second receiving slot of a screen clamp provided by an embodiment of the present disclosure is shown;

[0027] Figure 5C A schematic diagram showing a first state of a screen clamp fixing a screen module provided by an embodiment of the present disclosure;

[0028] Figure 5D A schematic diagram showing a second state of a screen clamp fixing a screen module provided by an embodiment of the present disclosure;

[0029] Figure 5E A schematic diagram of the structure of an air duct provided by an embodiment of the present disclosure is shown;

[0030] Figure 6 A partial structural schematic diagram of another assembly device provided by an embodiment of the present disclosure is shown;

[0031] Figure 7 A schematic diagram showing a flow chart of an assembling method of an optical system provided by an embodiment of the present disclosure;

[0032] Figure 8A to Figure 8B A schematic diagram showing a process of assembling an optical system provided by an embodiment of the present disclosure is shown;

[0033] Fig. 9 A schematic diagram showing a process of assembling another optical system provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0034] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0035] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the embodiments of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0036] As described in the background technology, with the continuous development of extended reality technology, the research and development of the optical system of extended reality devices has become increasingly important. Excellent optical systems can provide a higher quality and more realistic user experience for the application of extended reality devices, and promote the application and development of extended reality technology in different fields. Therefore, the technology of developing the optical system of extended reality devices has important practical significance and market potential.

[0037] Extended reality devices include head-mounted display devices (such as smart glasses), holographic projections, etc. Figure 1 A schematic diagram of the structure of an extended reality device provided by an embodiment of the present disclosure is shown, specifically AR glasses 100. The optical system of AR glasses needs to meet the following requirements: first, high transparency and high definition to ensure that virtual elements can be accurately displayed in the user's field of view; second, high brightness, so that virtual elements can be more naturally integrated with the real environment; finally, stability to ensure binocular image formation, so as to avoid discomfort or dizziness during use. At present, the optical solutions used by AR glasses mainly include prism optics, free-form surfaces, Birdbath, reflective light waveguides, and diffraction light waveguides.

[0038] Figure 2A A schematic structural diagram of an optical system provided by an embodiment of the present disclosure is shown. Figure 2B Show Figure 2A FIG. 2 is an exploded view of the optical system 200. Figure 2A and Figure 2B It can be seen that the optical system includes a screen module 201 , a lens unit 202 , a bracket 203 and a waveguide plate 204 .

[0039] Figure 2CA schematic diagram of the structure of a screen module provided by an embodiment of the present disclosure is shown. The screen module 201 includes a display panel 2011 and a connector 2012. The connector 2012 is used to provide power to the display panel 2011, and the display panel 2011 provides display content. Optionally, the display panel 2011 can be selected from a silicon-based organic light-emitting semiconductor (Micro-Organic Electroluminescence Display, referred to as Micro OLED), a micro-light emitting diode (Micro-Light Emitting Diode, referred to as Micro LED), a silicon-based liquid crystal (Liquid Crystal on Silicon, referred to as LCoS) or a thin film field effect transistor liquid crystal display (Thin Film Transistor-Liquid Crystal Display, referred to as TFT LCD). Among them, Micro LED has the characteristics of high brightness, high resolution, high contrast, and long service life.

[0040] The lens unit 202 is located on the light-emitting side of the screen module 201 ( Figure 2C The arrow in the figure indicates the outgoing light of the display panel 2011), and the outgoing light of the screen module 201 is focused onto the surface of the waveguide 204 to ensure that the outgoing light can accurately enter the waveguide 204, thereby helping to form a high-quality virtual graphic.

[0041] The lens unit 202 includes at least one lens, wherein the lens may be an optical glass lens, or an optical plastic lens.

[0042] The lens may include a spherical surface, an aspherical surface, or a curved surface. Among them, the aspherical lens has a better curvature radius, can maintain good aberration correction to obtain the required performance, and has better sharpness and higher resolution. The aspherical lens can effectively reduce the spherical aberration and distortion of the optical system, thereby reducing the number of lenses and the size of the lenses, thereby reducing the thickness and quality of the optical system.

[0043] It should be noted that for different types of display panels, the optical system may also include a phase retardation film, a polarization film, etc. For example, when a Micro OLED display panel or a Micro LED display panel is used, since the light emitted by the Micro OLED display panel or the Micro LED display panel is natural light, a polarization film and a phase retardation film need to be provided, wherein the polarization film converts natural light into linearly polarized light. For example, when an LCoS display panel or a TFT LCD is used, since the light emitted by the LCoS display panel and the TFT LCD is linearly polarized light, a phase retardation film needs to be provided on the exit surface, and no polarization film is required.

[0044] The waveguide plate 204 includes an incoupling region and an outcoupling region. The outgoing light passing through the lens unit 202 can be transferred from the incoupling region to the outcoupling region and finally reach the human eye.

[0045] In some embodiments, the waveguide sheet 204 may be a diffraction waveguide sheet or a reflection waveguide sheet. The diffraction waveguide sheet is a transparent medium with a certain periodic structure on the surface of the internal waveguide layer, which can guide light from one point to another point, thereby forming a virtual image. Optionally, the diffraction waveguide sheet is selected from a surface relief grating waveguide or a volume holographic grating waveguide.

[0046] The bracket 203 is used to carry various optical components, such as the screen module 201 , the lens unit 202 and the waveguide plate 204 .

[0047] Optionally, the bracket includes a first limiting groove (not shown in the figure) and a second limiting groove 2031 (refer to Fig. 9 ); wherein the first limiting groove is used to set the waveguide plate; the second limiting groove 2031 is used to set the lens unit 202. Of course, the bracket can also include only the first limiting groove, which will not be repeated. In this case, the bracket is suitable for the case where the lens unit 201 is installed on the screen module 201.

[0048] Optionally, the bracket includes a preset glue area, which can be used for gluing the screen module 201 and the lens unit 201 during assembly. Of course, the preset glue area can include multiple parts, which are used to glue one or more of the screen module 201, the lens unit 202 and the waveguide sheet 204.

[0049] Optionally, the bracket 203 may be an AR glasses frame.

[0050] Since optical systems are high-precision components, any assembly tolerance and parts manufacturing tolerance may have a huge impact on the optical imaging system, resulting in problems such as reduced clarity, reduced uniformity, and image inconsistency.

[0051] In view of this, the exemplary embodiments of the present disclosure provide an assembly device for an optical system. The device can be used to conveniently adjust the position of the screen module so that the first image of the outgoing light of the screen module passing through the lens unit and the virtual image obtained by entering the waveguide sheet meet the preset conditions, and finally the screen module and the bracket at the corresponding position are assembled, so as to achieve the technical effect of reducing the assembly error and reducing the influence of the manufacturing error on the display effect of the optical system.

[0052] In order to make the technical solution of the present disclosure clearer and easier to understand, the assembly device of the optical system provided by the embodiment of the present disclosure is introduced below with reference to the accompanying drawings.

[0053] Figure 3A schematic structural diagram of an optical system assembly device provided by an embodiment of the present disclosure is shown.

[0054] The assembly device 300 comprises:

[0055] The support module 301 is used to support the bracket 203 or the lens unit 202 in the optical system 200 .

[0056] The screen clamp 302 is used to fix the screen module. When powered on, the screen module can be lit up to form outgoing light.

[0057] Next, combine Figure 4 to Figure 5E Detailed description of the support module and screen clamp.

[0058] Figure 4 A partial structural schematic diagram of an assembly device for an optical system provided by an embodiment of the present disclosure is shown. Among them, the support module 401 can clamp the bracket 203 or the lens unit (not shown in the figure). The screen clamp 402 can fix the screen module (not shown in the figure). It should be noted that the objects clamped by the support module 401 are different in different steps of the assembly method. For example, in the process of setting the lens unit on the screen module, the support module 401 clamps the lens unit, and the screen clamp 402 fixes the screen module; for another example, in the process of assembling the screen module and the waveguide plate, the support module 401 clamps the bracket 203 (at this time, the waveguide plate 203 is set on the bracket) (refer to Figure 4 ), the screen clamp 402 fixes the screen module (at this time, a lens unit is connected to the screen module or the bracket).

[0059] For screen fixture, Figure 5A A schematic structural diagram of a screen clamp provided in an embodiment of the present disclosure is shown. Figure 5B A schematic structural diagram of a second receiving groove of a screen clamp provided in an embodiment of the present disclosure is shown.

[0060] See also Figure 5A and Figure 5B The screen clamp 500 includes a first accommodating groove 501 and a second accommodating groove 502; the first accommodating groove 501 is used to set the display panel of the screen module; the second accommodating groove 502 is provided with a power interface 505, and the pins of the power interface 505 and the connector of the screen module are aligned one by one.

[0061] Optionally, a retaining wall 506 is disposed on the periphery of the second receiving groove 502. The retaining wall 506 is used to help define the relative position of the connector and the second receiving groove 502, thereby preventing the connector from moving relative to the second receiving groove 502.

[0062] Figure 5CA schematic diagram showing a first state of a screen clamp fixing a screen module provided by an embodiment of the present disclosure; Figure 5D A second state schematic diagram of a screen clamp fixing a screen module provided by an embodiment of the present disclosure is shown. Figure 5C and Figure 5D An exemplary description is as follows:

[0063] like Figure 5C As shown, the screen clamp includes a rotating pressure plate 503 , and the rotating pressure plate 503 is provided with a protruding block 5031 , and the protruding block 5031 is used to abut the connector 2012 .

[0064] It should be noted that, optionally, a groove 5032 cooperating with the retaining wall 506 may be provided on the rotating pressing plate 503, and the protruding block 5031 is provided inside the groove 5032. The groove 5032 can be provided to conveniently accommodate the retaining wall 506, which is helpful for fixing the connector 2012.

[0065] Here, the screen fixture includes a body 504 (see Figure 5A The first receiving groove 501 , the second receiving groove 502 and the rotating pressing plate 503 are all disposed on the main body 504 .

[0066] It should be understood that the rotating pressing plate 503 is rotatably connected to the body 504. When the movable end of the rotating pressing plate 503 is away from the body 504, the second receiving groove 502 is exposed, so that the connector 2012 can be conveniently placed in the second receiving groove (such as Figure 5C When the movable end of the rotating pressing plate 503 is close to the body 504, the protruding block 5031 can abut against the connector 2012 (as shown in FIG. Figure 5D shown).

[0067] In order to fix the rotating pressure plate 503 and ensure that it can abut the connector 2012 during the assembly process, the main body of the screen clamp includes a first claw 5041, and the rotating pressure plate 503 includes a second claw 5033. The first claw 5041 and the second claw 5033 cooperate with each other to fix the position of the rotating pressure plate 503.

[0068] Optionally, the rotating pressing plate 503 includes a fixing portion (not marked in the figure), and the second clamping claw 5033 is rotatably connected to the fixing portion. In this way, the second clamping claw 5033 is rotated under the action of an external force so that it can engage with the first clamping claw 5041, thereby achieving the fixing of the position of the rotating pressing plate. When the external force acts on the second clamping claw 5033 again and the position of the second clamping claw 5033 is rotated, the engagement between the two can be released, so that the rotating pressing plate 503 can be conveniently rotated to achieve the placement or removal of the connector.

[0069] In some embodiments, the rotating pressure plate 503 includes a first elastic member, which is disposed at the fixing portion and is used to limit the position of the second claw 5033. When an external force acts on the second claw 5033, it needs to overcome the elastic force of the first elastic member.

[0070] Optionally, a second elastic member may be provided at the connection position between the rotating pressure plate 503 and the body 504 to limit the position of the rotating pressure plate 503 , thereby further enhancing the fixing effect on the connector.

[0071] Figure 5E The schematic diagram of the structure of an air duct provided by an embodiment of the present disclosure is shown. Specifically, the screen clamp includes an air duct 507, and the air duct 507 is connected to the first receiving groove 501. It should be noted that an exhaust hole 5011 is provided at the bottom of the first receiving groove 501. After the display panel 2011 is placed in the first receiving groove 501, a negative pressure can be formed in the first receiving groove 501 by means of the air duct 507, thereby achieving the fixation of the display panel 2011.

[0072] Compared with the clamping structure, using negative pressure to fix the display panel 2011 can not only prevent the clamping structure from blocking the light from the display panel 2011 , but also prevent the uneven force caused by the clamping structure from affecting the light from the display panel 2011 , thereby ensuring that the display panel 2011 has a flat and complete structure.

[0073] The adjustment module 303 is used to adjust the position of the screen fixture to change the position of the screen module, so that the outgoing light of the screen module can pass through the lens unit to form a first image, and then enter the waveguide sheet after passing through the lens unit to form a virtual image.

[0074] Figure 6 A partial structural schematic diagram of an assembly device provided by an embodiment of the present disclosure is shown. Figure 6 6-DOF platform 601 and adapter fixture 602 are shown. Adapter fixture 602 is used to connect 6-DOF platform 601 and screen fixture 603, so that screen fixture 603 can be conveniently connected to 6-DOF platform 601. Among them, 6-DOF platform can rotate in three directions of XYZ and three angles of UVW, and can drive the screen module to move arbitrarily within a certain range.

[0075] With the help of the six-degree-of-freedom platform 601, active alignment (AA process) of the optical system can be realized, that is, the best assembly position for imaging is found through continuous feedback calibration of the system, so as to eliminate manufacturing and assembly errors.

[0076] It should be noted that the adjustment module 303 can be any other device that can drive the screen fixture to move to change its position and angle. The above-mentioned six-degree-of-freedom platform 601 is only exemplary and not restrictive.

[0077] The image acquisition unit 304 is used to acquire the first image or the virtual image. For example, the image acquisition unit may be a camera 604 (see Figure 6 ).

[0078] Optionally, the image acquisition unit includes a first camera and a second camera; the first camera is used to acquire a first image, and the second camera is used to acquire a virtual image. It should be noted that the first camera and the second camera can be the same camera obtained by changing the position. The first camera and the second camera can also be multiple cameras, which is not limited here.

[0079] The processing unit 305 is used to control the adjustment module to adjust the position of the screen module according to the acquired virtual image and the second preset condition. It should be noted that the processing unit 305 is connected to the image acquisition unit 304 and the adjustment module 303 .

[0080] In one embodiment, during the process of setting the lens unit on the screen module, the processing unit 305 can also be used to control the adjustment module to adjust the position of the screen module according to the acquired first image and the first preset condition so as to optimize the relative position of the lens unit and the screen module.

[0081] In addition, the assembly device may further include a glue dispensing device (not shown in the figure). Through the glue dispensing device, optically clear adhesive (OCA) can be applied to the preset glue area of ​​the bracket, so as to achieve connection between the components of the optical system using the optical adhesive.

[0082] It is understandable that the glue used for gluing is not limited thereto, and the glue may also be liquid optically clear adhesive (LOCA), ultraviolet light curing adhesive, thermal curing adhesive, etc.

[0083] For the convenience of description, the above devices are described in terms of functions divided into various modules and modules. Of course, when implementing the present disclosure, the functions of each module can be implemented in the same or multiple software and / or hardware.

[0084] The device of the above embodiment is used to implement the corresponding assembly method in any of the following embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be described in detail here.

[0085] Based on the same inventive concept, corresponding to any of the above-mentioned embodiments, the present disclosure also provides an assembly method for an optical system. The method sets the waveguide sheet on the bracket; sets the lens unit at a preset position; adjusts the position of the screen module so that the outgoing light of the screen module can pass through the lens unit into the waveguide sheet and form a virtual image; monitors the virtual image; and in response to determining that the virtual image meets the second preset condition, assembles the screen module at the corresponding position to the bracket, thereby achieving the technical effect of reducing assembly errors and reducing the impact of manufacturing errors on the display effect of the optical system.

[0086] Figure 7 The schematic diagram of the process flow of an optical system assembly method provided by the embodiment of the present disclosure is shown. The optical system includes a screen module, a lens unit, a bracket and a waveguide. Figure 7 As shown, the assembly method includes:

[0087] Step S701: placing the waveguide plate on the bracket.

[0088] Optionally, the waveguide plate may be arranged on the bracket by means of structural positioning.

[0089] In some embodiments, the bracket includes a first limiting groove (not shown in the figure), and step S701 includes: placing the waveguide plate in the first limiting groove. Optionally, the waveguide plate can be glued to the first limiting groove.

[0090] Step S702: placing the lens unit at the preset position, such as a bracket or the screen module. It should be noted that step S702 may also be performed before step S701, and the present disclosure does not limit the order of the two.

[0091] In some embodiments, the lens unit is disposed on the bracket by means of structural positioning. Fig. 9 , the lens unit 202 can be arranged by using the second limiting groove 2031 on the bracket. It should be noted that the lens unit 202 can be glued to the second limiting groove 2031. Compared with the active alignment method, the structural positioning method is helpful to save equipment costs.

[0092] In some alternative embodiments, the lens unit may be disposed on the screen module in an active alignment manner, specifically including:

[0093] First, the screen module is fixed and lit using a screen fixture, and the lens unit is fixed using a support module; Fig. 8AA schematic diagram of the process of assembling an optical system provided by an embodiment of the present disclosure is shown. The screen clamp (not shown in the figure) can clamp the screen module 201, and the support module can clamp the lens unit 203. The first camera (not shown in the figure) can be located on the side of the lens unit 203 away from the screen module 201, so as to facilitate the acquisition of the first image.

[0094] Optionally, the screen clamp includes a first receiving slot and a second receiving slot; the second receiving slot is provided with a power interface; and using the screen clamp to fix and light up the screen module includes:

[0095] Fixing the display panel of the screen module to the first receiving groove; here, the air duct can be used to form negative pressure to fix the display panel; and

[0096] The connector of the screen module is fixed to the second receiving groove, and the pins of the connector are aligned one by one with the power interface.

[0097] Next, adjusting the position of the screen module relative to the lens unit, and monitoring a first image of the outgoing light of the screen module passing through the lens unit;

[0098] Finally, in response to determining that the first image satisfies the first preset condition, the lens unit is assembled to the screen module (refer to Fig. 8A Middle right and Figure 8B It should be noted that the lens unit 202 can be glued to the screen module 201.

[0099] Here, the first preset condition may be pre-set, including but not limited to clarity, uniformity, etc.

[0100] In some embodiments, monitoring the first image comprises:

[0101] The first image is acquired and analyzed.

[0102] Assembling the lens unit to the screen module by active alignment can effectively reduce the installation error between the screen module and the lens unit, which is beneficial to improving the final display effect.

[0103] Figure 8B A schematic diagram of the process of assembling an optical system provided by an embodiment of the present disclosure is shown. Fig. 8A Based on the obtained structure, we can further Figure 8B Continue the installation as shown.

[0104] Step S703: fix the bracket with the support module, fix the screen module with the screen fixture and light up the screen module, adjust the position of the screen fixture to change the position of the screen module, so that the outgoing light of the screen module can pass through the lens unit into the waveguide sheet and form a virtual image. Here, the way of fixing the screen module with the screen fixture is as described above and will not be repeated.

[0105] It should be noted that if the lens unit is disposed on the bracket, the support module is fixed with the bracket and the waveguide sheet and the lens unit on the bracket; if the lens unit is disposed on the screen module, the screen fixture is fixed with the screen module and the lens unit on the screen module (refer to Figure 8B ).

[0106] Here, the position of the screen fixture is adjusted to change the position of the screen module relative to the bracket 203 to achieve an optimal position.

[0107] Step S704: monitoring the virtual image.

[0108] In some embodiments, monitoring the virtual image comprises:

[0109] The virtual image is acquired and analyzed. It should be noted that the virtual image can be acquired by using an image acquisition unit (such as a second camera). The processing unit can analyze the virtual image.

[0110] Optionally, the position of the screen fixture in step S703 is adjusted by active alignment. With such a technical solution, the position of the screen fixture is adjusted by active alignment to ensure assembly accuracy. Step S705: In response to determining that the virtual image meets the second preset condition, the screen module at the corresponding position is assembled on the bracket.

[0111] The second preset condition refers to the condition that the virtual image meets the observation requirements of the human eye, including but not limited to clarity, uniformity, etc. In addition, for a binocular optical system, virtual images of two eyes can be collected at the same time, and the two need to meet the registration condition.

[0112] In one embodiment, before assembling the screen module at the corresponding position on the bracket, the method further includes:

[0113] Glue is applied to the preset glue area of ​​the bracket to glue the screen module to the bracket. It should be noted that after gluing, the glue can be solidified by ultraviolet light irradiation, and then the glue can be aged by heating to ensure the reliability of the gluing.

[0114] It should be noted that, depending on whether the lens unit is set on the screen module or the bracket, the specific location of the glue dispensing here may be different to ensure the stability of the installation of the screen module.

[0115] By adopting a one-time active alignment implementation method, that is, firstly setting the waveguide plate and the lens unit on the bracket by means of structural positioning, and then adjusting the position of the screen clamp by means of active alignment, it is possible to reduce production costs while ensuring assembly accuracy, including but not limited to active alignment equipment costs and personnel costs.

[0116] The implementation method of two active alignments is adopted, that is, the position of the screen fixture is adjusted by active alignment, so that the assembly of the lens unit and the screen module and the assembly of the screen module and the waveguide are all achieved by active alignment, which can greatly reduce the assembly error, thereby reducing the manufacturing error requirements for optical structural parts. In other words, the two active alignments can reduce the manufacturing error while ensuring the accuracy of the optical system. Compared with the one active alignment, the two active alignments do not need to consider the manufacturing tolerances and assembly tolerances of the bracket and lens unit position; in addition, the angle tolerance at the bracket waveguide can also be relaxed by about 20%, which can greatly reduce the manufacturing and processing costs.

[0117] It should be noted that the method of the embodiment of the present disclosure can be performed by a single device, such as a computer or a server. The method of the present embodiment can also be applied in a distributed scenario and completed by multiple devices cooperating with each other. In the case of such a distributed scenario, one of the multiple devices can only perform one or more steps in the method of the embodiment of the present disclosure, and the multiple devices will interact with each other to complete the described method.

[0118] It should be noted that the above describes some embodiments of the present disclosure. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0119] Based on the same inventive concept, corresponding to any of the above-mentioned embodiment methods, the present disclosure also provides an extended reality device, including an optical system obtained by any of the above-mentioned assembly methods.

[0120] In some embodiments, the waveguide plate includes an incoupling region and an outcoupling region, and the outgoing light passes through the lens unit into the incoupling region and is transmitted to the outcoupling region to display a virtual image.

[0121] In some embodiments, the bracket includes a preset glue area for glue-dispensing connection to the screen module.

[0122] In some embodiments, the bracket includes a first limiting groove; wherein the first limiting groove is used to set the waveguide plate.

[0123] The extended reality device of the above-mentioned embodiment adopts the corresponding assembly method in any of the above-mentioned embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be repeated here.

[0124] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples. Based on the concept of the present disclosure, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present disclosure as described above, which are not provided in detail for the sake of simplicity.

[0125] In addition, to simplify the description and discussion, and in order not to make the embodiments of the present disclosure difficult to understand, the known power / ground connections to the integrated circuit (IC) chips and other components may or may not be shown in the provided figures. In addition, the device can be shown in the form of a block diagram to avoid making the embodiments of the present disclosure difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform on which the embodiments of the present disclosure will be implemented (that is, these details should be fully within the scope of understanding of those skilled in the art). Where specific details (e.g., circuits) are set forth to describe exemplary embodiments of the present disclosure, it is apparent to those skilled in the art that the embodiments of the present disclosure can be implemented without these specific details or with changes in these specific details. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0126] Although the present disclosure has been described in conjunction with specific embodiments of the present disclosure, many replacements, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.

[0127] The embodiments of the present disclosure are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A method for assembling an optical system, characterized in that: The optical system includes a screen module, a lens unit, a bracket and a waveguide; the assembly method includes: placing the waveguide plate on the bracket; Setting the lens unit at a preset position; Adjusting the position of the screen module so that the outgoing light of the screen module can pass through the lens unit, enter the waveguide sheet and form a virtual image; monitoring the virtual image; In response to determining that the virtual image satisfies a second preset condition, the screen module at the corresponding position is assembled to the bracket.

2. The assembly method according to claim 1, characterized in that: The preset position is selected from the bracket or the screen module; The step of setting the lens unit at a preset position comprises: The lens unit is arranged on the bracket by means of structural positioning; or Adjusting the position of the screen module relative to the lens unit, and monitoring a first image of the outgoing light of the screen module passing through the lens unit; In response to determining that the first image satisfies a first preset condition, the lens unit is assembled to the screen module.

3. The assembly method according to claim 2, characterized in that: The bracket includes a first limiting groove; the step of arranging the waveguide plate on the bracket includes: The waveguide plate is arranged in the first limiting groove.

4. The assembly method according to claim 1, characterized in that: Also includes: Fixing the screen module by using a movable screen clamp; The screen clamp comprises a first receiving slot and a second receiving slot; The second receiving slot is provided with a power interface; The screen clamp fixes the screen module, including: Fixing the display panel of the screen module to the first receiving groove; as well as The connector of the screen module is fixed to the second receiving groove, and the pins of the connector are aligned one by one with the power interface, so that the screen module generates outgoing light.

5. The assembly method according to claim 4, characterized in that: The first receiving groove is connected to the air duct; the display panel of the screen module is fixed to the first receiving groove, comprising: The air duct is used to form negative pressure to fix the display panel.

6. The assembly method according to claim 1, characterized in that: Monitoring the virtual image includes: The virtual image is acquired and analyzed.

7. The assembly method according to claim 1, characterized in that: Before assembling the screen module at the corresponding position on the bracket, the method further includes: Glue is dispensed in a preset glue area of ​​the bracket to glue the screen module to the bracket.

8. An assembly device for an optical system, characterized in that: The optical system includes a screen module, a lens unit, a bracket and a waveguide; the assembly device includes: A supporting module, used for supporting the bracket; A screen clamp, used to fix the screen module; An adjustment module, used for adjusting the position of the screen fixture to change the position of the screen module, so that the outgoing light of the screen module can pass through the lens unit and enter the waveguide sheet to form a virtual image; An image acquisition unit, used for acquiring the virtual image; The processing unit is used to control the adjustment module to adjust the position of the screen module according to the acquired virtual image and the second preset condition.

9. The assembly device according to claim 8, characterized in that: The screen clamp includes a first accommodating groove and a second accommodating groove; the first accommodating groove is used to set the display panel of the screen module; the second accommodating groove is provided with a power interface, and the pins of the power interface and the connector of the screen module are aligned one by one.

10. The assembly device according to claim 9, characterized in that: The screen clamp comprises an air duct, and the air duct is connected to the first containing groove.

11. The assembly device according to claim 9, characterized in that: The screen clamp comprises a rotating pressing plate, and the rotating pressing plate is provided with a protruding block, and the protruding block is used to abut against the connector.

12. The assembly device according to claim 11, characterized in that: The screen clamp includes a first clamping claw, and the rotating pressure plate includes a second clamping claw. The first clamping claw and the second clamping claw cooperate with each other to fix the position of the rotating pressure plate.

13. The assembly device according to claim 8, characterized in that: The adjustment module includes a six-degree-of-freedom platform.

14. The assembly device according to claim 8, characterized in that: The support module is also used to support the lens unit; The image acquisition unit is also used to obtain a first image of the outgoing light of the screen module passing through the lens unit; The processing unit is further used to control the adjustment module to adjust the position of the screen module according to the acquired first image and the first preset condition.

15. The assembly device according to claim 14, characterized in that: The image acquisition unit includes a first camera and a second camera; the first camera is used to acquire a first image, and the second camera is used to acquire a virtual image.

16. An extended reality device, characterized in that: An optical system comprising the assembly method according to any one of claims 1 to 7.

17. The extended reality device according to claim 16, characterized in that: The waveguide plate comprises an incoupling region and an outcoupling region, and the outgoing light passes through the lens unit into the incoupling region and is transmitted to the outcoupling region to display a virtual image.

18. The extended reality device according to claim 16, characterized in that: The bracket includes a preset glue area for connecting the screen module by glue spotting.

19. The extended reality device according to claim 16, characterized in that: The bracket comprises a first limiting groove, and the first limiting groove is used to set the waveguide plate; or The bracket includes a first limiting groove and a second limiting groove; the first limiting groove is used to set the waveguide plate, and the second limiting groove is used to set the lens unit.

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