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 and a high-definition display screen, the background display screen is provided with a through hole, and the high-definition display screen is attached to one side, deviating from the lens, of the background display screen and covers the through hole, so that light of the high-definition display screen and light of the background display screen are respectively incident to the lens. The through hole is formed in the background display screen, the high-definition display screen and the background display screen are attached together, the high-definition display screen covers the through hole and is located on the side, away from the lens, of the background display screen, light emitted by the high-definition display screen can directly enter the lens through the through hole, and light emitted by the background display screen can directly enter the lens. Light emitted by the background display screen and the high-definition display screen is received by human eyes through the lens. According to the optical assembly, light energy loss caused by the fact that light rays of the high-definition display screen are reflected by the semi-reflecting and semi-transmitting mirror and light rays emitted by the background display screen penetrate through the semi-reflecting and semi-transmitting mirror is reduced, and the display brightness is improved.

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 half-mirror. The light of the background display screen passes through the semi-reflective half-mirror, and the light of the high-definition display screen is reflected on the semi-reflective half-mirror. After the two groups of light are synthesized, they are incident on the lens and received by the human eye. This design has at least the following two defects: 1. The light of the high-definition display screen is reflected by the semi-reflective half-mirror, and the light of the background display screen is transmitted through the semi-reflective half-mirror, and there will be brightness loss; 2. The semi-reflective half-mirror 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 head-mounted display device, aiming to solve the technical problems of brightness loss in the optical component in the prior art and high requirements for the installation accuracy of the semi-reflective and semi-mirror lenses.

[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 and a high-definition display screen, wherein the background display screen is provided with a through hole, and the high-definition display screen is attached to a side of the background display screen away from the lens and covers the through hole, so that the light from the high-definition display screen and the background display screen are respectively incident on the lens.

[0006] 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, or the projection of the outer contour of the through hole on the high-definition display screen coincides with the outer contour of the high-definition display area.

[0007] In one embodiment, the background display screen includes a background display area and a second non-display area arranged outside the background display area, and the outer edge of the high-definition display area overlaps with a portion of the background display area.

[0008] In one embodiment, the optical component further includes a glass piece, the glass piece completely fills the through hole, and the light of the high-definition display screen passes through the glass piece and is incident on the lens.

[0009] In one embodiment, the high-definition display screen is bonded to the glass member.

[0010] In one embodiment, the glass piece includes a filling portion and an adhesive portion which are interconnected, the filling portion is arranged in the through hole and fills the through hole, the adhesive portion is adhered to the side of the background display screen facing away from the high-definition display screen, and the high-definition display screen is arranged in contact with the adhesive portion.

[0011] In one embodiment, the glass piece is a T-shaped glass piece.

[0012] In one embodiment, the through hole is a square hole, and the high-definition display screen is a square display screen.

[0013] In one embodiment, the lens is an aspherical lens.

[0014] 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.

[0015] In one embodiment, the head mounted display device is a virtual reality device or a mixed reality device.

[0016] In the above scheme, the optical component includes a lens, a background display screen and a high-definition display screen. A through hole is provided on the background display screen. The high-definition display screen is attached to the side of the background display screen away from the lens and covers the through hole, so that the light from the high-definition display screen and the background display screen are respectively incident on the lens. The background display screen is generally a large screen, and the high-definition display screen is generally a small screen. The high-definition display screen presents the content that needs to be displayed in high definition. 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 from the high-definition display screen and the background display screen is synthesized to reflect a local high-definition display effect. In the above invention, by providing a through hole on the background display screen, the high-definition display screen is attached to the background display screen, the high-definition display screen covers the through hole and is located on the side of the background display screen away from the lens, the light emitted by the high-definition display screen can be directly incident on the lens through the through hole, the light emitted by the background display screen can be directly incident on the lens, and the light emitted by the background display screen and the high-definition display screen is received by the human eye through the lens. The lens can use an aspherical lens to play a magnifying role. The invention uses an ingenious structural design to allow the light from the background display screen and the high-definition display screen to be directly incident on the lens without passing through a semi-reflective mirror, thereby removing the semi-reflective half-mirror in the prior art, reducing the light energy loss of the high-definition display screen through the semi-reflective half-mirror and the light from the background display screen through the semi-reflective half-mirror, thereby improving the display brightness. In addition, due to the assembly angle tolerance of the semi-reflective half-mirror in the prior art, the light 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 semi-reflective half-mirror, and the light from the high-definition display screen is directly incident on the lens. There is no assembly angle tolerance of the semi-reflective half-mirror, which reduces the difficulty of assembly. The invention has the advantages of being able to reduce light energy loss, improve display brightness and reduce assembly difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 is a schematic structural diagram of an optical component according to an embodiment of the present invention;

[0019] Figure 2 It is a schematic structural diagram of a high-definition display screen and a background display screen of an optical assembly according to an embodiment of the present invention;

[0020] Figure 3It is a schematic structural diagram of a high-definition display screen, a background display screen and a glass component of an optical assembly according to an embodiment of the present invention.

[0021] Description of labels:

[0022] 100. Optical component; 1. High-definition display screen; 11. High-definition display area; 12. First non-display area; 2. Background display screen; 21. Through hole; 22. Background display area; 23. Second non-display area; 3. Lens; 4. Glass member; 41. Filling part; 42. Adhesive part.

[0023] 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

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] Reference Figure 1 to Figure 3 According 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 and a lens 3, wherein a through hole 21 is provided on the background display screen 2, and the high-definition display screen 1 is attached to a side of the background display screen 2 away from the lens 3 and covers the through hole 21, so that light from the high-definition display screen 1 and the background display screen 2 are respectively incident on the lens 3.

[0029] The background display screen 2 and the high-definition display screen 1 can generally be packaged together with optical glue. The background display screen 2 is generally a large screen, and the high-definition display screen 1 is generally a small screen. The high-definition display screen 1 presents the content that needs to be displayed in high definition. 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 here. Figure 1 , the light emitted by the high-definition display screen 1 is in the middle, as indicated by arrow A, and the light emitted by the background display screen 2 is on the periphery, as indicated by arrow B. In the above embodiment, by setting a through hole 21 on the background display screen 2, the high-definition display screen 1 and the background display screen 2 are bonded together, the high-definition display screen 1 covers the through hole 21 and is located on the side of the background display screen 2 away from the lens 3, the light emitted by the high-definition display screen 1 can be directly incident on the lens 3 through the through hole 21, and the light emitted by the background display screen 2 can be directly incident on the lens 3, and the light emitted by the lens 3 is received by the human eye. The lens 3 can use a non-spherical lens to play a magnifying role. It should be noted that the light emitted by the high-definition display screen 1 and the background display screen 2 can be directly incident on the lens 3, which means that it does not need to pass through a semi-reflective and semi-mirror lens to be directly incident on the lens 3. This embodiment uses a clever structural design so that the light from the background display screen 2 and the high-definition display screen 1 can be directly incident on the lens 3 without passing through a half-reflecting half-mirror, thereby removing the half-reflecting half-mirror in the prior art, reducing the light energy loss of the high-definition display screen 1 reflected by the half-reflecting half-mirror and the light emitted by the background display screen 2 passing through the half-reflecting half-mirror, thereby improving the display brightness. 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 optical path correction is required to reduce the optical path error. This embodiment directly cancels the setting of the half-reflecting half-mirror, and the light from the high-definition display screen 1 is directly incident on the lens 3. There is no assembly angle tolerance of the half-reflecting half-mirror, which reduces the difficulty of assembly. This embodiment has the advantages of being able to reduce light energy loss, improve display brightness and reduce assembly difficulty.

[0030] 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 21 on the high-definition display screen 1 is within the high-definition display area 11 or 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 21 discussed here refers to the projection of the inner wall surface of the through hole 21 on the high-definition display screen 1, and the projection of the through hole 21 is a closed shape. If the through hole 21 is circular, the projection of the outer contour of the through hole 21 on the high-definition display screen 1 is a circular contour; if the through hole 21 is rectangular, the projection of the outer contour of the through hole 21 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 21, that is, the high-definition display area 11 can cover the entire through hole 21. 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 21. 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 21 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 21 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 21 and ensuring the continuity of the visual picture. 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 outer contour of the through hole 21 is projected on the high-definition display screen 1 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 21. In this way, part of the light in the high-definition display area 11 passes through the background display screen 2 and is incident on the lens 3, further ensuring 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 transitions smoothly.

[0031] Reference Figure 3 In one embodiment, the background display screen 2 includes a background display area 22 and a second non-display area 23 disposed outside the background display area 22. The outer edge of the high-definition display area 11 overlaps with a portion of the background display area 22. The specific overlapping area is as follows: Figure 1As shown in D. The high-definition display screen 1 is attached to the surface of the background display screen 2 and covers the through hole 21. The high-definition display area 11 of the high-definition display screen 1 is arranged opposite to the through hole 21, and the area of ​​the high-definition display area 11 is larger than the cross-sectional area of ​​the through hole 21, so a part of the high-definition display area 11 will overlap with the background display screen 2. The light emitted from the overlapping position of the high-definition display area 11 and the background display screen 2 can pass through the background display screen 2 and be incident on the lens 3, ensuring the continuity of the visual picture when the optical paths of the high-definition display screen 1 and the background display screen 2 are synthesized. As for the overlapping width, those skilled in the art can set it according to actual needs.

[0032] Reference Figure 1 In one embodiment, the optical assembly 100 further includes a glass member 4, which fills the through hole 21. The light of the high-definition display screen 1 passes through the glass member 4 and is incident on the lens 3. The high-definition display screen 1 is bonded to the glass member 4. The glass member 4 is used to fill the through hole 21 of the background display screen 2, so that the light of the high-definition display screen 1 is directly incident on the glass member 4, and then incident on the lens 3 from the glass member 4, thereby avoiding the influence of the air medium on the optical performance of the high-definition display screen 1, where the optical performance includes brightness and contrast.

[0033] Reference Figure 3 In one embodiment, the glass component 4 includes a filling portion 41 and a bonding portion 42 that are connected to each other. The filling portion 41 is arranged in the through hole 21 and fills the through hole 21. The bonding portion 42 is bonded to the side of the background display screen 2 that is away from the high-definition display screen 1. The high-definition display screen 1 is bonded to the bonding portion 42. The bonding portion 42 is used to bond with the background display screen 2 through optical glue to play a fixing role. The filling portion 41 fills the through hole 21. The high-definition display screen 1 is bonded to the bonding portion 42 to ensure that the light emitted by the high-definition display screen 1 can be directly incident on the glass component 4. Regarding the structural form of the bonding portion 42, it can be two strips or square glasses respectively connected to the two sides of the filling portion 41. The two square glasses are respectively bonded to the background display screen 2. The entire glass component 4 presents a T shape, which is a T-shaped glass component.

[0034] In one embodiment, the through hole 21 is a square hole, and the high-definition display screen 1 is a square display screen. Of course, the through hole 21 here can be any desired shape, such as a square hole, a circular hole or other polygonal hole. The shape of the through hole 21 can match the shape of the high-definition display screen 1.

[0035] 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 can be a virtual reality device or a mixed reality device, the virtual reality device can be a VR headset, and the mixed reality device can be an MR headset.

[0036] 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: It comprises a lens, a background display screen and a high-definition display screen. The background display screen is provided with a through hole. The high-definition display screen is attached to a side of the background display screen away from the lens and covers the through hole, so that the light of the high-definition display screen and the background display screen are respectively incident on the lens.

2. 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. The projection of the outer contour of the through hole on the high-definition display screen is within the high-definition display area, or the projection of the outer contour of the through hole on the high-definition display screen coincides with the outer contour of the high-definition display area.

3. The optical component according to claim 2, characterized in that The background display screen includes a background display area and a second non-display area arranged outside the background display area, and the outer edge of the high-definition display area is overlapped with a part of the background display area.

4. The optical component according to any one of claims 1 to 3, characterized in that: The optical component also includes a glass piece, which fills the through hole, and the light from the high-definition display screen passes through the glass piece and is incident on the lens.

5. The optical component according to claim 4, characterized in that The high-definition display screen is bonded to the glass piece.

6. The optical component according to claim 4, characterized in that The glass piece includes a filling part and a bonding part connected to each other, the filling part is arranged in the through hole and fills the through hole, the bonding part is bonded to the side of the background display screen away from the high-definition display screen, and the high-definition display screen is bonded to the bonding part.

7. The optical component according to claim 6, characterized in that The glass piece is a T-shaped glass piece.

8. The optical component according to any one of claims 1 to 3, characterized in that: The through hole is a square hole, and the high-definition display screen is a square display screen.

9. The optical component according to any one of claims 1 to 3, characterized in that: The lens is an aspherical lens.

10. 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 9 mounted on the housing.

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