Optical engine module, optical engine component and head-mounted display device

Abstract

The present application discloses an optical engine module. The optical engine module is used for a display device. The optical engine module includes a first optical device and a bracket. The first optical device is used for reflecting and / or transmitting light for a wearer of a head-mounted display device to view from an observation point. The bracket is used for mounting the first optical device. The bracket includes a side wall. The side wall includes a first end and a second end. The first end is closer to the first optical device than the second end. Along the center line direction of the field of view range of the observation point, the second end is closer to the observation point than the first end. Along the direction perpendicular to the center line, the second end is closer to the center line than the first end. The present application also discloses an optical engine assembly and a head-mounted display device. In the optical engine module, optical engine assembly and head-mounted display device of the present application, the occlusion range of the side wall for the field of view is small, improving the visual experience of the user.

Description

Technical Field

[0001] This application relates to the technical field of wearable devices, and more particularly, to an optical engine module, an optical engine assembly, and a head-mounted display device. Background Art

[0002] Augmented Reality (AR) is a technology that superimposes virtual objects onto the real environment and enables interaction. By projecting the images of virtual objects and the real environment into the user's eyes, the user can obtain an experience of the integration of virtual and real. Currently, near-eye display devices capable of implementing augmented reality, such as AR glasses, etc., have emerged on the market. As a core component of near-eye display devices, the optical engine module is the key to realizing augmented reality. However, when the user is using it, the horizontal sides on both sides of the user's field of view are blocked relatively much by the support structure of the optical engine module, which affects the user's visual experience. Summary of the Invention

[0003] Embodiments of this application provide an optical engine module, an optical engine assembly, and a head-mounted display device.

[0004] The optical engine module according to the embodiments of this application includes a first optical device and a bracket. The first optical device is configured to reflect and / or transmit light for the wearer of the head-mounted display device to view from an observation point. The bracket is used to mount the first optical device. The bracket includes a sidewall, and the sidewall includes a first end and a second end. The first end is closer to the first optical device than the second end. Along the center line direction of the field of view range of the observation point, the second end is closer to the observation point than the first end. Along the direction perpendicular to the center line, the second end is closer to the center line than the first end.

[0005] In some embodiments, the sidewall includes a first sidewall and a second sidewall. The first sidewall and the second sidewall are respectively located on two opposite sides of the center line, and the first sidewall and the second sidewall are respectively connected to two ends of the first optical device.

[0006] In some embodiments, a plane determined by the observation point and a first edge of the visible area of the first optical device close to the first sidewall is defined as a first plane, and the sidewall is disposed on a side of the first plane opposite to the center line; and / or a plane determined by the observation point and a second edge of the visible area of the first optical device close to the second sidewall is defined as a second plane, and the second sidewall is disposed on a side of the second plane opposite to the center line.

[0007] In some embodiments, a first plane is defined by the observation point and a first edge of the visible area of the first optical device close to the first sidewall, and the sidewall is parallel to the first plane; and / or a second plane is defined by the observation point and a second edge of the visible area of the first optical device close to the second sidewall, and the second sidewall is parallel to the second plane.

[0008] In some embodiments, the optical engine module further includes a projection device mounted on the bracket, and the projection device is configured to project an image onto the first optical device.

[0009] In some embodiments, the optical engine module further includes a second optical device mounted on the bracket, and the second optical device is configured to reflect the image projected by the projection device to the first optical device.

[0010] In some embodiments, a third optical device is connected to a side of the sidewall close to the center line. The second optical device can reflect a part of the image projected by the projection device to the third optical device, and the third optical device can reflect the received image to the observation point.

[0011] In some embodiments, a light absorbing device is connected to a side of the sidewall close to the center line, and the light absorbing device can absorb the light reflected by the second optical device onto the sidewall.

[0012] The optical engine assembly according to the embodiments of the present application includes a housing and the optical engine module according to any one of the above embodiments, and the optical engine module is mounted on the housing.

[0013] The head-mounted display device according to the embodiments of the present application includes a frame and the optical engine assembly according to the above embodiments, and the optical engine assembly is mounted on the frame.

[0014] In the optical engine module, optical engine assembly and head-mounted display device according to the embodiments of the present application, the first optical device is mounted on a bracket. The bracket includes a sidewall, and the sidewall includes a first end and a second end. The first optical device is mounted at a position close to the first end. Along the center line direction of the viewing field range of the observation point, the second end is closer to the observation point than the first end, and along the direction perpendicular to the center line, the second end is closer to the center line than the first end. When observing the image on the first optical device through the observation point, the width of the sidewall in the user's field of view is small. Therefore, the occlusion range of the sidewall on the field of view is small, improving the user's visual experience.

[0015] Additional aspects and advantages of the embodiments of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the embodiments of the present application. Description of the Drawings

[0016] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, where:

[0017] Figure 1 is a three-dimensional assembly schematic diagram of a head-mounted device according to some embodiments of the present application.

[0018] Figure 2 is a three-dimensional assembly schematic diagram of an optical engine module according to some embodiments of the present application;

[0019] Figure 3 is a planar assembly schematic diagram of an optical engine module according to some embodiments of the present application;

[0020] Figure 4 is a planar assembly drawing of an optical engine module of the prior art;

[0021] Figure 5 is a planar assembly schematic diagram of an optical engine module from one perspective according to some embodiments of the present application;

[0022] Figure 6 is a planar assembly schematic diagram of an optical engine module from another perspective according to some embodiments of the present application;

[0023] Figure 7 is a planar assembly schematic diagram of an optical engine module from yet another perspective according to some embodiments of the present application;

[0024] Figure 8 is a planar assembly schematic diagram of an optical engine module from one perspective according to some embodiments of the present application;

[0025] Figure 9 is a planar assembly schematic diagram of an optical engine module from another perspective according to some embodiments of the present application;

[0026] Figure 10 is a planar assembly schematic diagram of an optical engine module from yet another perspective according to some embodiments of the present application;

[0027] Figure 11 is a three-dimensional assembly schematic diagram of an optical engine module according to some embodiments of the present application;

[0028] Figure 12 is a three-dimensional assembly schematic diagram of an optical engine module according to some embodiments of the present application;

[0029] Figure 13 is a planar assembly schematic diagram of an optical engine module according to some embodiments of the present application;

[0030] Figure 14 is a planar assembly schematic diagram of an optical engine module according to some embodiments of the present application;

[0031] Figure 15 It is a three - dimensional assembly schematic diagram of the optical - machine module in some embodiments of the present application.

[0032] Description of main component symbols:

[0033] Head - mounted device 1000, optical - machine component 100, optical - machine module 10, bracket 11, side wall 12, first end 121, second end 122, first side wall 123, second side wall 124, side - wall projection 125, first optical device 13, projection device 14, second optical device 15, frame 200. Specific embodiments

[0034] The following further describes the embodiments of the present application with reference to the accompanying drawings. The same or similar reference numerals in the drawings represent the same or similar elements or elements with the same or similar functions from beginning to end.

[0035] In addition, the embodiments of the present application described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of the present application, and should not be construed as a limitation of the present application.

[0036] In the present application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0037] Please refer to Figure 1 , the head - mounted device 1000 of the embodiments of the present application includes a frame 200 and an optical - machine component 100, wherein the optical - machine component 100 is installed on the frame 200. The frame 200 can play a role in fixing and protecting the optical - machine component 100. The frame 200 can be a spectacle frame or a protective housing on the head - mounted device 1000. The optical - machine component 100 is installed on the frame 200, and the frame 200 can protect the optical - machine component 100 so that the optical - machine component 100 is not easily damaged, and no limitation is made here. Among them, the head - mounted device 1000 can be a VR device, an AR device, etc., and no limitation is made here. In the embodiments of the present application, the AR device is taken as an example for description. It can be understood that the head - mounted device 1000 can be others.

[0038] Furthermore, the optical - machine component 100 includes a housing and an optical - machine module 10, and the optical - machine module 10 is installed on the housing. The housing can play a role in protecting and fixing the optical - machine module 10.

[0039] Further, please refer to Figure 2 and Figure 3 , the optical engine module 10 of the embodiment of the present application includes a bracket 11 and a first optical device 13. The first optical device 13 is configured to reflect and / or transmit light for the wearer of the head-mounted display device 1000 to view from the viewing point E. The bracket 11 is used to mount the first optical device 13. The bracket 11 includes a side wall 12. The side wall 12 includes a first end 121 and a second end 122. The first end 121 is closer to the first optical device 13 than the second end 122. Along the direction of the center line L of the viewing field range of the viewing point E, the second end 122 is closer to the viewing point E than the first end 121. Along the direction perpendicular to the center line L, the second end 122 is closer to the center line L than the first end 121.

[0040] In the embodiment of the present application, the first optical component is mounted on the bracket 11. The bracket 11 includes a side wall 12. The side wall 12 includes a first end 121 and a second end 122. The first end 121 is closer to the first optical device 13 than the second end 122. Along the direction of the center line L of the viewing field range of the viewing point E, the second end 122 is closer to the viewing point E than the first end 121, and along the direction perpendicular to the center line L, the second end 122 is closer to the center line L than the first end 121. When observing the image on the first optical device 13 through the viewing point E, the width of the side wall 12 in the user's field of view is small. Thus, the shielding range of the side wall 12 on the field of view is small, improving the visual experience of the product.

[0041] Among them, the first optical device 13 can reflect and / or transmit light. The wearer of the head-mounted display device 1000 can view the content on the first optical device 13 through the viewing point E. The viewing point E can be a window on the head-mounted display device 1000. Through this window, the wearer can view the content on the first optical device 13. Further, the wearer's eyes view the content on the first optical device 13 at the viewing point E. The embodiment of the present application takes the user's eyes viewing the content on the first optical device 13 at the viewing point E as an example for illustration. At this time, the viewing field range of the viewing point E is the field of view that the eyes can observe in the head-mounted display device 1000 when the user wears the head-mounted display device 1000.

[0042] Specifically, please refer to Figure 4 and Figure 5 , Figure 5The optical engine module of the prior art is shown by the dashed line, and the optical engine module 10 of some embodiments of the present application is shown by the solid line. The side wall 12' in the prior art is vertically arranged, that is, the distances from the first end and the second end of the side wall 12' to the center line L of the field of view range are equal. At this time, there is an incident light ray 302 from the first end of the side wall 12' to the observation point E, and there is an incident light ray 301' from the second end of the side wall 12' to the observation point E. The side wall projection 125' of the side wall 12' in the direction of the incident light ray 302 is the width of the field of view occlusion area. It can be seen that the corresponding field of view occlusion area 401' in Figure 4 is relatively large, resulting in a poor visual experience for the user when using the head-mounted device 1000.

[0043] Please refer to Figures 5 to 7 , in the optical engine module 10 of some embodiments, when the length of the first optical device 13 is the same as that of the first optical device in the prior art, since the first end 121 is closer to the first optical device 13 than the second end 122, thus, the first optical device 13 is installed in the direction where the first end 121 is located. When the first end 121 of the side wall 12 is installed at the same position as the first end of the side wall 12', where the connection line between the observation point E and the center of the field of view range is the center line L of the field of view range of the observation point E. Along the center line L direction, the second end 122 is closer to the observation point E than the first end 121. Further, along the direction perpendicular to the center line L, the second end 122 of the side wall 12 is closer to the center line L than the first end 121, that is, the distance from the second end 122 to the center line L is less than the distance from the first end 121 to the center line L. Then, the second end 122 of the side wall 12 is closer to the center line L than the second end of the side wall 12', that is, the side wall 12 is inclined towards the direction where the observation point E is located relative to the side wall 12'.

[0044] Further, at this time, the light ray incident from the first end 121 of the side wall 12 to the observation point E is still the incident light ray 302, and the light ray incident from the second end 122 of the side wall 12 to the observation point E is the incident light ray 301. The side wall projection 125 of the side wall 12 in the directions of the incident light ray 302 and the incident light ray 301 can be observed. It can be seen that the width of the side wall projection 125 is narrower than that of the side wall projection 125'. Please refer to Figure 4 and Figure 6 , the field of view occlusion area 401 corresponding to the side wall projection 125 reduces a part of the field of view occlusion area 402 compared with the field of view occlusion area 401' corresponding to the side wall projection 125', that is, the field of view occlusion area 401 is narrower than the field of view occlusion area 401'. Thus, when the user views the image on the first optical device 13, the influence of the field of view occlusion area on viewing the image is weakened, and the visual experience of the user is improved.

[0045] Further, please refer to Figure 5, the incident light ray 301 is the incident light ray from the second end 122 to the observation point E, the incident light ray 302 is the incident light ray from the first end 121 to the observation point E, W is the width of the side wall projection 125, β is the angle between the side wall 12 and the incident light ray 302, the incident light ray 301' is the incident light ray from the second end of the side wall 12' in the prior art to the observation point E, W1 is the width of the side wall projection 125' of the side wall 12' in the prior art, and β1 is the angle between the side wall 12' in the prior art and the incident light ray 302. Here, the difference ΔW between W and W1 is calculated, that is, the width of the blocked field of view area reduced by the optical engine module 10 in the embodiment of the present application. The specific calculation process of ΔW is as follows:

[0046] Assume that the length of the side wall 12 of the optical engine module 10 in the embodiment of the present application is S, and the length of the side wall 12 of the optical engine module in the prior art is S'. The lengths of the side wall 12 and the side wall 12' are equal, that is, S = S'. Then, it can be obtained that:

[0047] W = S * Sin(β); W1 = S' * Sin(β1) = S * Sin(β1);

[0048] ΔW = W - W1 = S * Sin(β) - S * Sin(β1) = S * (Sin(β) - Sin(β1)). Since β > β1, Sin(β) > Sin(β1), so ΔW > 0. Thus, the optical engine module 10 in the embodiment of the present application can effectively reduce the blocked field of view area caused by the side wall 12, effectively improving the user's visual experience.

[0049] Furthermore, the reduced blocked field of view area 402 can provide a partial accommodation space when installing the optical engine module 10, enabling the housing to save space when enclosing the optical engine module 10. At the same time, part of the housing can be installed in the reduced blocked field of view area 402, reducing the blocked field of view area of the optical engine component 100 for the user, and further reducing the blocked field of view area of the head-mounted display device 1000 for the user, enhancing the user's usage experience.

[0050] Please refer to Figures 8 to 10 , Figure 8 , the dashed line in Figure 8 shows the optical engine module in the prior art, and the solid line shows the optical engine module 10 in some embodiments of the present application. Compared with the optical engine module in the prior art, the installation position of the second end 122 of the side wall 12 is the same as that of the second end 122 of the side wall 12' in the prior art. The first end 121 of the side wall 12 is inclined away from the center line L compared with the first end of the side wall 12'. That is, the side wall 12 in this embodiment is inclined in the direction of the observation point E relative to the side wall 12', thus forming the

[0051] Further, in Figure 8 , the incident light ray 302' is the light ray incident from the first end of the side wall 12' in the prior art to the observation point E, the incident light ray 301 is the light ray incident from the second end of the side wall 12' to the observation point E, and the projection of the side wall 12' in the directions of the incident light rays 301 and 302' is the side wall projection 125', that is, the field of view occlusion area formed by the side wall 12'. At the same time, the second end 122 of the side wall 12 has the same installation position as the second end of the side wall 12', so the incident light ray 301 is the same. The incident light ray 302 is the light ray incident from the first end 121 of the side wall 12 to the observation point E, and the projection of the side wall 12 in the directions of the incident light rays 301 and 302 is the side wall projection 125, that is, the field of view occlusion area formed by the side wall 12. Combining Figure 4 and Figure 9 , it can be seen that the width of the side wall projection 125 is narrower than that of the side wall projection 125'. Therefore, the field of view occlusion area 401 corresponding to the side wall 12 is smaller than the field of view occlusion area 401' corresponding to the side wall 12' in the prior art. Thus, for the optical engine module 10 in this embodiment compared with the optical engine module in the prior art, the field of view occlusion range formed by the side wall 12 is smaller, improving the visual experience of the user when viewing the image on the first optical device 13. At the same time, the field of view range α of the optical engine module 10 in this embodiment is larger than the field of view range α' of the optical engine module in the prior art. When the user views the image on the first optical device 13, the visual effect of the user will be better, enhancing the visual experience of the user.

[0052] Among them, the optical engine module 10 of the embodiment of the present application can be the Figure 5 shown optical engine module 10, or can be the Figure 8 shown optical engine module 10, which is not limited herein.

[0053] Please refer to Figure 2 and Figure 11 , Figure 2 and Figure 11 . The field of view range 501 is the schematic field of view range viewed through the observation point. The opening of the field of view range 501 is the observation point E shown in the optical engine module 10, that is, the user can observe the field of view range on the optical engine module 10 through the observation point E. Further, the range where the field of view range 501 intersects with the first optical device 13 is the range on the first optical device 13 that the user can observe.

[0054] Please refer to Figure 3 , Figure 12 and Figure 13, the sidewall 12 includes a first sidewall 123 and a second sidewall 124. The first sidewall 123 and the second sidewall 124 are respectively located on two opposite sides of the center line L. The first sidewall 123 and the second sidewall 124 are respectively connected to two end portions 111 of the first optical device 13. Specifically, the sidewall 12 includes a first sidewall 123 and a second sidewall 124. The first sidewall 123 and the second sidewall 124 are respectively located on two opposite sides of the center line L. It can be understood that the first sidewall 123 and the second sidewall 124 are not on the same side of the center line L, that is, one of the first sidewall 123 and the second sidewall 124 is on the left side of the center line L and the other is on the right side of the center line L.

[0055] Furthermore, both the first sidewall 123 and the second sidewall 124 include a first end 121 and a second end 122. The first optical device 13 has two end portions 111 in the horizontal direction. The two end portions 111 are respectively located on two opposite sides of the center line L. The first end 121 of the first sidewall 123 is connected to one end portion 111 of the first optical device 13, and the first end 121 of the second sidewall 124 is connected to the other end portion 111 of the first optical device 13. Then, the first sidewall 123 and the second sidewall 124 are not on the same side of the center line L. The second ends 122 of both the first sidewall 123 and the second sidewall 124 are closer to the observation point E than the first ends 121, that is, the extending directions of the first sidewall 123 and the second sidewall 124 are the directions extending from the end portions 111 to the observation point E. Thus, external light can be prevented from entering the viewing range to cause interference, and the visual effect when the user observes the image is better, improving the user's visual experience.

[0056] In one embodiment, the two end portions 111 of the first optical device 13 are axisymmetric with respect to the center line L. The second end 122 of the first sidewall 123 and the second end 122 of the second sidewall 124 are axisymmetric with respect to the center line L. The first end 121 of the first sidewall 123 and the first end 121 of the second sidewall 124 are axisymmetric with respect to the center line L. Then, the first sidewall 123 and the second sidewall 124 are axisymmetric with respect to the center line L. Thus, the field-of-view occlusion areas formed by the first sidewall 123 and the second sidewall 124 are also axisymmetric with respect to the center line L. Thus, the user can fully experience the image displayed on the first optical device 13, and the viewing experience is more comfortable. The visual effect when the user observes the image is better, and at this time, the user's eyes are at the center of the field of view, and the visual experience will be stronger.

[0057] Please refer to Figure 3 and Figure 13, the plane determined by the observation point E and the first edge of the visible area of the first optical device 13 is the first plane M1, and the plane determined by the observation point E and the second edge of the visible area of the first optical device 13 is the second plane M2. Specifically, the first optical device 13 has a visible area, which is the area that can be observed on the first optical device 13. The visible area has a first edge and a second edge respectively. The first edge is the boundary on one side of the visible area, and the second edge is the boundary on the other side of the visible area. Virtual images cannot be displayed beyond the boundaries on both sides of the visible area. The area between the first edge and the second edge on the first optical device 13 is the visible area. The first plane M1 can be determined by the observation point E and the first edge of the visible area, and the second plane M2 can be determined by the observation point E and the second edge of the visible area. Further, the first side wall 123 is disposed on the side opposite to the center line L of the first plane M1, and it can be understood that the first side wall 123 and the center line L are not on the same side of the first plane M1. The second side wall 124 is disposed on the side opposite to the center line L of the second plane M2, and it can be understood that the second side wall 123 and the center line L are not on the same side of the second plane M2.

[0058] Further, if the second end 122 of the first side wall 123 is between the first plane M1 and the center line L, that is, the first side wall 123 will interfere with the first plane M1, the first side wall 123 will affect the field of view range and reduce the field of view range of the optical machine assembly 10, affecting the user experience. Therefore, by disposing the first side wall 123 on the side opposite to the center line L of the first plane M1, it can be avoided that the second end 122 of the first side wall 121 is too close to the center line L and affects the field of view range. If the second end 122 of the second side wall 124 is between the second plane M2 and the center line L, the second side wall 124 will interfere with the second plane M2, the second side wall 124 will affect the field of view range and reduce the field of view range of the optical machine assembly 10, affecting the user experience. Therefore, by disposing the second side wall 124 on the side opposite to the center line L of the first plane M2, it can be avoided that the second end 122 of the second side wall 124 is too close to the center line L and affects the field of view range.

[0059] Further, in one embodiment, the first side wall 123 is disposed on the side opposite to the center line L of the first plane M1, and the second side wall 124 is disposed on the side opposite to the center line L of the second plane M2. Thus, the field of view range on both sides of the center line L of the optical machine assembly 10 will not be reduced due to the first side wall 123 and the second side wall 124. In another embodiment, the first side wall 123 is disposed on the side opposite to the center line L of the first plane M1, or the second side wall 124 is disposed on the side opposite to the center line L of the second plane M2. Thus, it can be avoided that the first side wall 123 or the second side wall 124 affects the field of view range of the optical machine assembly 10.

[0060] Please refer to again Figure 3 and Figure 13 In some embodiments, the plane determined by the observation point E and the first edge of the visible area of the first optical device 13 is the first plane M1, and the plane determined by the observation point E and the second edge of the visible area of the first optical device 13 is the second plane M2. The first side wall 123 is parallel to the first plane M1, and / or the second side wall 124 is parallel to the second plane M2. Herein, the first side wall 123 being parallel to the first plane M1 means that the included angle β2 between the first side wall 123 and the incident light 302 is zero. At this time, the range of the field of view blocked by the first side wall 123 is the cross-sectional width of the first side wall 123, and the range of the field of view blocked by the first side wall 123 is the smallest, and the user's visual experience is better. The second side wall 124 is parallel to the second plane M2, that is, the included angle β3 between the second side wall 124 and the incident light 302 is zero. At this time, the range of the field of view blocked by the second side wall 124 is the cross-sectional width of the second side wall 124, and the range of the field of view blocked by the second side wall 124 is the smallest, and the user's visual experience is better.

[0061] In one embodiment, the first side wall 123 is parallel to the first plane M1, and the second side wall 124 is parallel to the second plane M2. Thus, the ranges of the fields of view blocked by the first side wall 123 and the second side wall 124 in the optical assembly 10 are both the smallest, and the user's visual experience is better. In another embodiment, the first side wall 123 is parallel to the first plane M1, or the second side wall 124 is parallel to the second plane M2. Thus, the area of the field of view blocked in the optical assembly 10 is relatively small, and the user's visual experience is better.

[0062] Please refer to Figure 7 、 Figure 14 and Figure 15 In some embodiments, the optical engine module 10 further includes a projection device 14. The projection device 14 is mounted on the bracket 11, and the projection device 14 is configured to project an image onto the first optical device 13. Specifically, the projection device 14 can project the image directly or indirectly onto the first optical device 13, and the first optical device 13 reflects the image to the observation point E, and the user can observe the image reflected by the first optical device 13.

[0063] Further, the optical engine module 10 further includes a second optical device 15. The second optical device 15 is mounted on the bracket 11 and is configured to reflect the image projected by the projection device 14 to the first optical device 13. Specifically, the second optical device 15 may be a flat optical component, and the side wall 12 fixes and supports the second optical device 15. In the example shown in the drawings of the present application, one end of the second optical device 15 may be connected to the first optical device 13, and the other end may be connected to the bracket 11. Thereby, the overall space of the optical engine module 10 can be saved, facilitating the installation of the optical engine module 10 in the optical engine assembly 100, and at the same time, the volume and weight of the optical engine assembly 100 can also be reduced.

[0064] Further, please refer to Figure 2 and Figure 12 , the second optical device 15 is a flat optical component. The second optical device 15 is mounted on the bracket. The flat optical component forms a 45° angle with the projection optical path of the projection device 14 so as to better reflect the image to the first optical device 13. Of course, the angle between the flat optical component and the projection optical path of the projection device 14 may also be other values, which is specifically determined by the optical design of the optical engine module 10 and is not limited herein.

[0065] Please refer to Figure 3 and Figure 11 , in some embodiments, the first end 121 is spaced from the end 111 of the first optical device 13. The first end 121 is closer to the center line L than the end 111. Thus, an installation space is formed between the first end 121 and the end 111. Through the installation space, the housing can support the optical engine bracket 11, making the optical engine module 10 more stable in the housing when the housing encloses the optical engine module 10.

[0066] Further, please refer to Figure 2 and Figure 12 , in some embodiments, the side wall 12 includes a side facing the center line L and a side away from the center line L. Define the side of the side wall 12 facing the center line L as the first side 126, and the side away from the center line L as the second side 127. A third optical device (not marked in the figure) is connected to the first side 126 of the side wall 12 close to the center line L. The second optical device 15 can reflect a part of the image projected by the projection device 14 to the third optical device, and the third optical device can reflect this part of the image to the observation point. Thus, the user can also see a part of the image in the occlusion area 401 as in Figure 6 , and the user no longer considers the occlusion area 401 as a redundant area, which not only increases the user's field of view but also improves the user's visual experience. Specifically, a third optical device is connected to the first side 126 of the side wall 12 close to the center line L. The third optical device may be a lens or a reflective film with a reflective function, which is not limited herein.

[0067] Further, in some embodiments, a light-absorbing device (not shown in the figure) is also connected to the side wall 12 on the side closer to the center line L, that is, a light-absorbing device is connected to the first side surface 126. The light-absorbing device has the function of absorbing light. That is, when light is projected onto the absorbing device, the light-absorbing device absorbs it and no light is reflected. Specifically, the light-absorbing device can be a device made of a light-absorbing material such as a dark film. Since the light-absorbing device is connected to the first side surface 126, when the second optical device 15 or the first optical device 13 reflects light onto the side wall 12, the light can be fully absorbed by the absorbing device and will not be reflected to generate stray light interference. Thus, when the user uses the head-mounted display device 1000, the user can avoid the stray light reflected by the side wall 12 from affecting the user's visual enjoyment and improve the user's visual experience.

[0068] Further, in some embodiments, the second optical device 15 is spaced apart from the side wall 12, and the side of the second optical device 15 is closer to the center line L than the side wall 12. It can be understood that there is a certain interval between the second optical device 15 and the side wall 12. Thus, the image reflected by the second optical device 15 onto the first optical device 13 is in the user's main field of view area. When the user views the image on the first optical device 13, the user's main field of view is not blocked by the side wall 12 all the time, which can weaken the visual field blockage of the side wall 12 on the user and enhance the user's visual experience.

[0069] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0070] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of the said features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, unless otherwise specifically and clearly defined.

[0071] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An optical-mechanical module for a head-mounted display device, characterized in that The optical engine module includes: A first optical device configured to reflect and / or transmit light for a wearer of the head-mounted display device to view from an observation point; and A bracket configured to mount the first optical device, the bracket including side walls, the side walls including a first end and a second end, the first end being closer to the first optical device than the second end, along the center line direction of the field of view range of the observation point, the second end being closer to the observation point than the first end, along a direction perpendicular to the center line, the second end being closer to the center line than the first end, and along the center line direction, the distance between the side wall and the center line gradually decreases; The side walls include a first side wall and a second side wall, the first side wall and the second side wall are respectively located on two opposite sides of the center line, and the first side wall and the second side wall are respectively connected to two ends of the first optical device; A plane determined by the observation point and a first edge of the visible area of the first optical device close to the first side wall is a first plane, and the first side wall is parallel to the first plane; a plane determined by the observation point and a second edge of the visible area of the first optical device close to the second side wall is a second plane, and the second side wall is parallel to the second plane; The first end is spaced apart from the end of the first optical device.

2. The optical machine module according to claim 1, wherein A plane determined by the observation point and a first edge of the visible area of the first optical device close to the first side wall is a first plane, and the first side wall is disposed on a side of the first plane opposite to the center line.

3. The optical engine module according to claim 1, wherein A plane determined by the observation point and a second edge of the visible area of the first optical device close to the second side wall is a second plane, and the second side wall is disposed on a side of the second plane opposite to the center line.

4. The optical engine module according to claim 1, wherein, The optical engine module further includes a projection device mounted on the bracket, the projection device being configured to project an image onto the first optical device.

5. The optical machine module according to claim 4, wherein The optical engine module further includes a second optical device mounted on the bracket, the second optical device being configured to reflect the image projected by the projection device to the first optical device.

6. The optical engine module according to claim 5, characterized in that, The second optical device is a flat optical element, and the second optical device forms a 45° angle with the projection optical path of the projection device.

7. The optical machine module according to claim 5, characterized in that, A third optical device is connected to a side of the side wall close to the center line, the second optical device is capable of reflecting a part of the image projected by the projection device to the third optical device, and the third optical device is capable of reflecting the received image to the observation point.

8. The optical engine module according to claim 5, characterized in that, An absorbing device is connected to a side of the side wall close to the center line, and the absorbing device is capable of absorbing the light reflected by the second optical device onto the side wall.

9. An optical-mechanical component, characterized in that, The optical engine assembly includes: A housing; and The optical engine module according to any one of claims 1 to 8, the optical engine module being mounted on the housing.

10. A head-mounted display device, characterized in that, The head-mounted display device includes: A frame; and The optical engine assembly according to claim 9, the optical engine assembly being mounted on the frame.

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