Optical assembly and head-mounted display device

Abstract

The invention provides an optical assembly and a head-mounted display device, the optical assembly comprises a lens, a background display screen, a high-definition display screen and a reflector, the background display screen and the high-definition display screen are respectively arranged at two sides of the reflector, and the high-definition display screen is arranged at one side, deviating from the lens, of the reflector; a through hole is formed in the reflecting mirror, light emitted by the high-definition display screen penetrates through the through hole and enters the lens, and light emitted by the background display screen is reflected by the reflecting mirror and then enters the lens. The high-definition display screen presents content needing high-definition display, the background display screen deletes the display content of the high-definition display screen through an algorithm and presents other content not needing high-definition display, and light emitted by the high-definition display screen and light emitted by the background display screen reflect the local high-definition display effect after being synthesized. The optical assembly has the advantages of being capable of reducing light energy loss, improving display brightness and reducing assembly difficulty.

Description

Technical Field

[0001] The present invention relates to the field of optical display technology, and in particular to an optical component and a head-mounted display device. Background Art

[0002] In the existing head-mounted display device, the optical components include a high-definition display screen, a background display screen, a lens and a semi-reflective lens. The light from the background display screen passes through the semi-reflective lens, and the light from the high-definition display screen is reflected on the semi-reflective lens. The two groups of light are combined and incident on the human eye. This design has at least the following two defects: 1. The light from the high-definition display screen will lose brightness after being reflected by the semi-reflective lens; 2. The semi-reflective lens has high installation accuracy requirements.

[0003] In view of this, it is necessary to provide a new optical component and head-mounted display device to solve or at least alleviate the above-mentioned technical defects. Summary of the invention

[0004] The main purpose of the present invention is to provide an optical component and a virtual reality device, aiming to solve the technical problems in the prior art of brightness loss of the optical component and high requirements for the installation accuracy of the semi-reflective and semi-mirror mirror.

[0005] To achieve the above-mentioned purpose, according to one aspect of the present invention, the present invention provides an optical component, including a lens, a background display screen, a high-definition display screen and a reflector, wherein the background display screen and the high-definition display screen are respectively arranged on both sides of the reflector, and the high-definition display screen is arranged on the side of the reflector away from the lens; a through hole is formed on the reflector, and the light emitted by the high-definition display screen passes through the through hole and is incident on the lens, and the light emitted by the background display screen is reflected by the reflector and is incident on the lens.

[0006] In one embodiment, the reflector is a free-form surface mirror, and the light emitted by the background display screen is incident on the lens after being totally reflected by the reflector.

[0007] In one embodiment, the concave surface of the reflector faces the side where the background display screen is located.

[0008] In one embodiment, the area through which the light rays incident from the reflector to the lens pass is defined as an incident area, and the background display screen is disposed outside the incident area.

[0009] In one embodiment, the high-definition display screen includes a high-definition display area and a first non-display area, and a projection of an outer contour of the through hole on the high-definition display screen coincides with an outer contour of the high-definition display area.

[0010] In one embodiment, the high-definition display screen includes a high-definition display area and a first non-display area arranged outside the high-definition display area, and the projection of the outer contour of the through hole on the high-definition display screen is within the high-definition display area.

[0011] In one embodiment, the background display screen includes a background display area and a second non-display area, the background display area is arranged outside the second non-display area, and the light emitted from the background display area is incident on the reflector and is incident on the lens after being totally reflected by the reflector.

[0012] In one embodiment, the lens is an aspherical lens.

[0013] According to another aspect of the present invention, the present invention further provides a head-mounted display device, the head-mounted display device comprising a housing and the above-mentioned optical component mounted on the housing.

[0014] In one embodiment, the head mounted display device is a virtual reality device (VR, Virtual Reality) or a mixed reality device (MR, Mixed Reality).

[0015] In the above scheme, the optical components include a lens, a background display screen, a high-definition display screen and a reflector. The background display screen and the high-definition display screen are respectively arranged on both sides of the reflector, and the high-definition display screen is arranged on the side of the reflector away from the lens. A through hole is formed on the reflector, and the light emitted by the high-definition display screen passes through the through hole and enters the lens, and the light emitted by the background display screen is reflected by the reflector and enters the lens. The high-definition display screen presents the content that needs to be displayed in high definition, and the background display screen deletes the display content of the high-definition display screen through an algorithm, and presents other content that does not need to be displayed in high definition. The light emitted by the high-definition display screen and the background display screen is synthesized to reflect a local high-definition display effect. In the above scheme, a through hole is provided on the reflector, and the high-definition display screen is arranged facing the through hole. The light of the high-definition display screen is emitted directly toward the lens through the through hole. The background display screen and the high-definition display screen are respectively arranged on both sides of the reflector, and the background display screen and the lens are arranged on the same side of the reflector. The light emitted from the background display screen is reflected by the reflector and then emitted directly toward the lens. The light emitted by the high-definition display screen and the light reflected by the reflector are synthesized to reflect a local high-definition display effect. The human eye receives the light from the side of the lens away from the reflector. The lens can be an aspherical lens to play a magnifying role. The invention uses a clever structural design so that the light of the high-definition display screen can be directly incident on the lens without passing through a semi-reflective and semi-mirror lens, removes the semi-reflective and semi-mirror lens in the prior art, reduces the light energy loss of the light of the high-definition display screen after being reflected by the semi-reflective and semi-mirror lens, and improves the display brightness. In addition, due to the assembly angle tolerance of the half-reflecting half-mirror in the prior art, the optical path of the high-definition display screen will be deflected to a certain extent relative to the optical axis center of the lens, and a high-precision assembly process or optical path correction is required to reduce the optical path error. The invention directly cancels the setting of the half-reflecting half-mirror, and the assembly accuracy requirement of the high-definition display screen is not high, which can save process costs or reduce the amount of calculation of software correction of the optical path. The invention has the advantages of reducing light energy loss, improving display brightness and reducing assembly difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 is a schematic structural diagram of an optical component according to an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the structure of a background display screen, a lens and a reflector of an optical assembly according to an embodiment of the present invention;

[0019] Figure 3 The figure is a schematic structural diagram of a high-definition display screen, a lens and a reflector of an optical assembly according to an embodiment of the present invention.

[0020] Description of labels:

[0021] 100. Optical components; 1. High-definition display screen; 11. High-definition display area; 12. First non-display area; 2. Background display screen; 21. Background display area; 22. Second non-display area; 3. Lens; 4. Reflector; 41. Through hole.

[0022] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that all directional indications (such as up, down, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In addition, in the present invention, the descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0026] Furthermore, the technical solutions between the various embodiments of the present invention may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in the field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] Reference Figure 1According to one aspect of the present invention, the present invention provides an optical component 100, including a high-definition display screen 1, a background display screen 2, a lens 3 and a reflector 4, the background display screen 2 and the high-definition display screen 1 are respectively arranged on both sides of the reflector 4, and the high-definition display screen 1 is arranged on the side of the reflector 4 away from the lens 3; a through hole 41 is formed on the reflector 4, and the light emitted by the high-definition display screen 1 passes through the through hole 41 and is incident on the lens 3, and the light emitted by the background display screen 2 is reflected by the reflector 4 and is incident on the lens 3.

[0028] The high-definition display screen 1 presents the content that needs to be displayed in high definition, and the background display screen 2 deletes the display content of the high-definition display screen 1 through an algorithm, and presents other content that does not need to be displayed in high definition. The light emitted by the high-definition display screen 1 and the background display screen 2 is synthesized to show a local high-definition display effect. The algorithm here belongs to the prior art and is not the invention point to be protected by the present invention, so it will not be described in detail here. Figure 1 and Figure 3 , the light emitted by the high-definition display 1 is in the middle, indicated by arrow B, refer to Figure 1 and Figure 2 , the light emitted by the background display screen 2 is at the periphery, as indicated by arrow A. In the above embodiment, a through hole 41 is provided on the reflector 4, and the high-definition display screen 1 is arranged facing the through hole 41. The light of the high-definition display screen 1 is emitted directly toward the lens 3 through the through hole 41. The background display screen 2 and the high-definition display screen 1 are respectively arranged on both sides of the reflector 4, and the background display screen 2 and the lens 3 are arranged on the same side of the reflector 4. The light emitted from the background display screen 2 is reflected by the reflector 4 and then emitted directly toward the lens 3. Here, directly emitting toward the lens 3 means that it does not need to pass through a semi-reflective and semi-mirror lens and is directly incident on the lens 3. The light emitted by the high-definition display screen 1 and the light reflected by the reflector 4 are synthesized to show a local high-definition display effect. The human eye receives light from the side of the lens 3 away from the reflector 4. The lens 3 can be an aspherical lens to play a magnifying role. This embodiment uses a clever structural design so that the light of the high-definition display screen 1 can be directly incident on the lens 3 without passing through a half-reflecting half-mirror. The half-reflecting half-mirror in the prior art is removed, the light energy loss of the high-definition display screen 1 after being reflected by the half-reflecting half-mirror is reduced, and the display brightness is improved. In addition, due to the assembly angle tolerance of the half-reflecting half-mirror in the prior art, the light path of the high-definition display screen 1 will be deflected to a certain extent relative to the optical axis center of the lens 3, and a high-precision assembly process or light path correction is required to reduce the light path error. This embodiment directly cancels the setting of the half-reflecting half-mirror, and the assembly accuracy requirement of the high-definition display screen 1 is not high, which can save process costs or reduce the amount of calculation of the software to correct the light path. This embodiment has the advantages of being able to reduce light energy loss, improve display brightness and reduce assembly difficulty.

[0029] In one embodiment, the reflector 4 is a free-form surface mirror, and the light emitted by the background display screen 2 is incident on the lens 3 after being totally reflected by the reflector 4. The free-form surface mirror here is customized according to the positions of the background display screen 2 and the high-definition display screen 1, and can totally reflect all the light incident on the reflector 4 from the background display screen 2 to the lens 3, thereby reducing the loss of light energy. Specifically, the concave surface of the free-form surface mirror faces one side of the background display screen 2, so that the background display screen 2 can totally reflect the light emitted by the background display screen 2.

[0030] In one embodiment, the area through which the light incident from the reflector 4 to the lens 3 passes is defined as the incident area, and the background display screen 2 is arranged outside the incident area. Here, the light incident from the reflector 4 to the lens 3 includes two light rays, one of which is the light incident from the high-definition display screen 1 through the through hole 41 to the lens 3, such as Figure 1 or Figure 3 As shown by the arrow B; one is the light emitted by the background display screen 2 and then reflected by the reflector 4 and incident on the lens 3, such as Figure 1 or Figure 2 As shown by the middle arrow A. The background display screen 2 is arranged outside the incident area to prevent the background display screen 2 from blocking the light, to ensure that the two light rays can smoothly enter the lens 3, to improve the display brightness and to ensure that the image is complete and clear. Specifically, the light from the background display screen 2 is obliquely irradiated onto the reflector 4.

[0031] Reference Figure 3In one embodiment, the high-definition display screen 1 includes a high-definition display area 11 and a first non-display area 12 arranged outside the high-definition display area 11, and the projection of the outer contour of the through hole 41 on the high-definition display screen 1 coincides with the outer contour of the high-definition display area 11. It should be noted that the projection of the outer contour of the through hole 41 discussed here refers to the projection of the inner wall surface of the through hole 41 on the high-definition display screen 1, and the projection of the through hole 41 is a closed shape. If the through hole 41 is circular, the projection of the outer contour of the through hole 41 on the high-definition display screen 1 is a circular contour; if the through hole 41 is rectangular, the projection of the outer contour of the through hole 41 on the high-definition display screen 1 is a rectangular contour. The outer contour of the high-definition display area 11 refers to the contour composed of the lines on the outer edge. The high-definition display area 11 refers to the area where the high-definition display screen 1 can emit light, and the first non-display area 12 refers to the area where light cannot be emitted. The first non-display area 12 is generally a signal area or a wiring area surrounding the periphery of the high-definition display area 11. In order to ensure the continuity of the visual picture, it is necessary to ensure that light passes through each position of the through hole 41, that is, the high-definition display area 11 can cover the entire through hole 41. For the background display screen 2 and the high-definition display screen 1, which are regular plane figures, it is only necessary that the area of ​​the high-definition display area 11 is larger than the cross-sectional area of ​​the through hole 41. If one or both of the background display screen 2 or the high-definition display screen 1 are curved surfaces, then it is defined that the projection of the outer contour of the through hole 41 on the high-definition display screen 1 must coincide with the outer contour of the high-definition display area 11. The coincidence indicates that the projection area of ​​the through hole 41 on the high-definition display area 11 is equal to the area of ​​the high-definition display area 11 and is arranged directly opposite to it, ensuring that light passes through each position of the through hole 41, and ensuring the continuity of the visual picture.

[0032] Of course, in order to further ensure the continuity of the visual picture at the junction, the junction refers to the junction of the display content of the high-definition display screen 1 and the display content of the background display screen 2, the projection of the outer contour of the through hole 41 on the high-definition display screen 1 is within the high-definition display area 11, that is, the area of ​​the high-definition display area 11 is set to be larger than the area of ​​the through hole 41, that is, the projection of the through hole 41 on the high-definition display screen 1 is within the high-definition display area 11. In this way, part of the light in the high-definition display area 11 is incident on the lens 3 through the reflector 4, which further ensures the continuity of the visual picture when the light of the high-definition display screen 1 and the background display screen 2 is synthesized, so that the picture clarity at the junction is smoothly transitioned.

[0033] Reference Figure 2In one embodiment, the background display screen 2 includes a background display area 21 and a second non-display area 22. The background display area 21 is arranged outside the second non-display area 22. The light emitted by the background display area 21 is incident on the reflector 4, and is reflected by the reflector 4 and incident on the lens 3. The background display area 21 refers to the area where light is emitted, and the second non-display area 22 refers to the area where no light is emitted. The second non-display area 22 is arranged in the middle position of the background display screen 2, and the corresponding through hole 41 of the reflector 4 is also arranged in the middle position of the reflector 4. In this way, the light emitted by the background display screen 2 can be incident on the reflector 4 but will not be incident on the position of the through hole 41, and will not be incident on the high-definition display screen 1 from the position of the through hole 41. In this way, neither light energy loss will be caused, nor will mixed light be caused by the light from the background display area 21 being incident on the high-definition display screen 1, so that the image finally received by the human eye overlaps and is blurred.

[0034] According to another aspect of the present invention, the present invention further provides a head-mounted display device, which includes a housing and the above-mentioned optical assembly 100 installed on the housing. Since the head-mounted display device includes all technical solutions of all embodiments of the above-mentioned optical assembly 100, it has all the beneficial effects brought by all the above-mentioned technical solutions, which are not repeated here. The head-mounted display device is a virtual reality device (VR, Virtual Reality) or a mixed reality device (MR, Mixed Reality).

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and do not limit the patent scope of the present invention; although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that under the technical concept of the present invention, the technical solutions recorded in the aforementioned embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; or directly / indirectly applied to other related technical fields, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An optical component, characterized in that: The invention comprises a lens, a background display screen, a high-definition display screen and a reflector, wherein the background display screen and the high-definition display screen are respectively arranged on both sides of the reflector, and the high-definition display screen is arranged on the side of the reflector away from the lens; a through hole is formed on the reflector, and the light emitted by the high-definition display screen passes through the through hole and is incident on the lens, and the light emitted by the background display screen is reflected by the reflector and is incident on the lens.

2. The optical component according to claim 1, characterized in that The reflector is a free-form surface mirror, and the light emitted by the background display screen is incident on the lens after being totally reflected by the reflector.

3. The optical component according to claim 2, characterized in that The concave surface of the reflector faces the side where the background display screen is located.

4. The optical component according to claim 1, characterized in that The area through which the light incident from the reflector to the lens passes is defined as the incident area, and the background display screen is arranged outside the incident area.

5. The optical component according to claim 1, characterized in that The high-definition display screen includes a high-definition display area and a first non-display area, and a projection of an outer contour of the through hole on the high-definition display screen coincides with an outer contour of the high-definition display area.

6. The optical component according to claim 1, characterized in that The high-definition display screen includes a high-definition display area and a first non-display area arranged outside the high-definition display area, and the projection of the outer contour of the through hole on the high-definition display screen is within the high-definition display area.

7. The optical component according to claim 1, characterized in that The background display screen includes a background display area and a second non-display area. The background display area is arranged outside the second non-display area. The light emitted from the background display area is incident on the reflector and is incident on the lens after being totally reflected by the reflector.

8. The optical component according to claim 1, characterized in that The lens is an aspherical lens.

9. A head mounted display device, characterized in that: The head mounted display device comprises a housing and the optical assembly according to any one of claims 1 to 8 mounted on the housing.

10. The head mounted display device according to claim 9, characterized in that: The head mounted display device is a virtual reality device or a mixed reality device.

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