Display light machine and head-mounted display device

Abstract

The invention discloses a display light machine and a head-mounted display device, and relates to the technical field of head-mounted display device.The display light machine comprises a display module, a fixed lens, a movable lens and a driving part, the display module is provided with a display area, the fixed lens is arranged corresponding to the display area and is fixed relative to the display module, and the movable lens is arranged on the fixed lens; the movable lens is arranged corresponding to the display area and can move relative to the display module, the driving piece is used for driving the movable lens to move, and at least one of the fixed lens and the movable lens is a convex lens. According to the technical scheme provided by the invention, the miniaturization of the head-mounted display equipment is ensured, so that the use experience of a user is ensured.

Description

Technical Field

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

[0002] When users with vision problems use head-mounted display devices such as virtual reality headsets, augmented reality headsets, and mixed reality headsets, they need to rely on vision correction clips to make the refractive power of the lens module match the user's vision. However, adding a vision correction clip will increase the size of the device and affect the user's experience. Summary of the invention

[0003] The main purpose of the present invention is to propose a display optical machine and a head-mounted display device, aiming to ensure the miniaturization of the head-mounted display device, thereby ensuring the user experience.

[0004] To achieve the above-mentioned purpose, the display optical machine proposed by the present invention comprises: A display module having a display area; A fixed lens, arranged corresponding to the display area and fixed relative to the display module; A movable lens, disposed corresponding to the display area and movable relative to the display module; and A driving member, used for driving the movable lens to move; Wherein, at least one of the fixed lens and the movable lens is a convex lens.

[0005] In one embodiment, the display light machine further includes a fixed bracket and a movable bracket, the fixed lens is mounted on the fixed bracket, the movable lens is mounted on the movable bracket, the movable bracket and the fixed bracket are rotatably and axially movably connected, and the driving member is configured as a knob and is relatively fixed to the movable bracket.

[0006] In one embodiment, the movable bracket is connected to the fixed bracket by threaded connection.

[0007] In one embodiment, the movable bracket is also equipped with a flat mirror.

[0008] In one embodiment, one end of the movable bracket is inserted into the fixed bracket, the driving member is sleeved on the other end of the movable bracket and sleeved on the outer peripheral side of the fixed bracket, and a positioning matching structure is provided between the driving member and the fixed bracket.

[0009] In one embodiment, between the inner circumferential side of the driving member and the outer circumferential side of the fixing bracket, one is provided with an axially extending straight positioning groove, and the other is provided with a convex positioning protrusion, and at least one of the straight positioning groove and the convex positioning protrusion is distributed in plurality along the circumferential direction, and one of the convex positioning protrusions is correspondingly engaged with one of the straight positioning grooves.

[0010] In one embodiment, the driving member has an elastic portion, and the positioning protrusion is disposed on the elastic portion.

[0011] In one embodiment, corresponding to one of the elastic parts, the driving member is provided with two through slots extending in the axial direction, and the through slots penetrate the end side of the driving member facing the display area, and the elastic part is formed between the two through slots.

[0012] In one embodiment, a plurality of the positioning straight grooves are evenly spaced along the circumferential direction on the outer circumferential side of the fixing bracket, and two positioning protrusions are radially arranged opposite to each other on the inner circumferential side of the driving member.

[0013] In one embodiment, a fixing protrusion is convexly provided on the outer periphery of the movable bracket, and a mounting groove is correspondingly provided on the driving member, and the fixing protrusion is fixed in the mounting groove.

[0014] The present invention also provides a head mounted display device, comprising the aforementioned display optical machine.

[0015] In the technical solution of the present invention, at least one of the fixed lens and the movable lens is set as a convex lens, which can converge the light emitted from the display area downstream of the optical path of the display area, so that the human eye can receive the output light of the display light machine. The present invention can drive the movable lens to move relative to the display module through a driving member. Since the fixed lens and the display module are relatively fixed, the movable lens can also move relative to the fixed lens, thereby changing the diopter of the fixed lens and the movable lens lens group, so that the diopter of the lens group can be changed by adjusting the distance between the movable lens and the fixed lens to match the user's vision. Without increasing the size of the device, the diopter requirements of users with different vision conditions can be met, which is conducive to ensuring the miniaturization of the head-mounted display device and further ensuring the user's experience. 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 creative work.

[0017] Figure 1A schematic structural diagram of an embodiment of a display optical machine provided by the present invention; Figure 2 for Figure 1 The cross-sectional view of the display optical machine along the AA direction; Figure 3 for Figure 1 The cross-sectional view of the display optical machine along the BB direction; Figure 4 A schematic diagram of the exploded structure of an embodiment of a display optical machine provided by the present invention; Figure 5 A schematic structural diagram of an embodiment of a driving component of a display optical machine provided by the present invention.

[0018] Description of Figure Numbers: 100. display module; 110. display area; 210, fixed lens; 220, fixed bracket; 221, positioning straight groove; 310, movable lens; 320, movable bracket; 321, fixed convex part; 330, flat mirror; 400, driving member; 410, elastic portion; 411, positioning protrusion; 420, through groove; 430, avoidance opening; 440, mounting groove.

[0019] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0020] 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.

[0021] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0022] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "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 technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is 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.

[0023] The present invention provides a display light machine, wherein the display light machine can be a VR (Virtual Reality) display light machine or an AR (Augmented Reality) display light machine.

[0024] See also Figures 1 to 4 In one embodiment of the present invention, the display light machine comprises: The display module 100 has a display area 110; A fixed lens 210 is disposed corresponding to the display area 110 and fixed relative to the display module 100; A movable lens 310 is disposed corresponding to the display area 110 and is movable relative to the display module 100; and A driving member 400, used for driving the movable lens 310 to move; Wherein, at least one of the fixed lens 210 and the movable lens 310 is a convex lens.

[0025] In the technical solution of the present invention, at least one of the fixed lens 210 and the movable lens 310 is set as a convex lens, which can converge the light emitted from the display area 110 downstream of the optical path of the display area 110, so that the human eye can receive the output light of the display light machine. The present invention can drive the movable lens 310 to move relative to the display module 100 through the driving member 400. Since the fixed lens 210 and the display module 100 are relatively fixed, the movable lens 310 can also move relative to the fixed lens 210, thereby changing the diopter of the fixed lens 210 and the movable lens 310 lens group, so that the diopter of the lens group can be changed by adjusting the distance between the movable lens 310 and the fixed lens 210 to match the user's vision. Without increasing the volume of the device, the diopter requirements of users with different vision conditions can be met, which is conducive to miniaturization of the head-mounted display device and further to ensure the user's experience.

[0026] Without loss of generality, the fixed lens 210 and the movable lens 310 may be provided with one piece or multiple pieces. Taking the fixed lens 210 and the movable lens 310 as an example, the refractive power of the lens assembly formed by the fixed lens 210 and the movable lens 310 is and the diopter of the fixed lens 210 , the diopter of the movable lens 310 , the distance between the fixed lens 210 and the movable lens 310 The following relations are satisfied:

[0027] If both the fixed lens 210 and the movable lens 310 are convex lenses, the diopter of both is positive, and the diopter of the fixed lens 210 and the movable lens 310 are both positive. For reference, add spacing , which will make Reduce, adapt to myopia; reduce spacing , which will make Enlarged to suit people with farsightedness.

[0028] If one of the fixed lens 210 and the movable lens 310 is a convex lens and the other is a concave lens, the diopter of the two is one positive and the other negative, and the product of the diopter of the two is a negative value. For reference, add spacing , which will make Increase to suit people with long-sightedness; reduce spacing , which will make . Reduced, suitable for myopic people.

[0029] In one embodiment, see Figures 1 to 4The display optical machine further comprises a fixed bracket 220 and a movable bracket 320, wherein the fixed lens 210 is mounted on the fixed bracket 220, and the movable lens 310 is mounted on the movable bracket 320, wherein the movable bracket 320 and the fixed bracket 220 are connected rotatably and axially movable, and the driving member 400 is configured as a knob and is relatively fixed to the movable bracket 320. In this way, the driving member 400 can change the distance between the fixed lens 210 and the movable lens 310 by driving the movable bracket 320 to rotate relative to the fixed bracket 220 and to move axially, thereby adjusting the diopter of the lens group composed of the two to adapt to the user's vision. Specifically, by rotating the driving member 400, while driving the movable bracket 320 to rotate relative to the fixed bracket 220, the movable bracket 320 can move axially relative to the fixed bracket 220, thereby changing the axial distance between the fixed lens 210 and the movable lens 310. Of course, in other embodiments, the fixed lens 210 and the movable lens 310 may be installed on the same bracket, and the driving member 400 directly drives the movable lens 310 to move axially.

[0030] In one embodiment, see Figures 2 to 4 , the movable bracket 320 is connected to the fixed bracket 220 by a threaded connection. In this way, the movable bracket 320 can be rotated by the driving member 400 to change the axial distance between the fixed lens 210 and the movable lens 310. Specifically, the movable bracket 320 is driven by the driving member 400 to rotate in the direction close to the display area 110, which will reduce the axial distance between the fixed lens 210 and the movable lens 310. The movable bracket 320 is driven by the driving member 400 to rotate in the direction away from the display area 110, which will increase the axial distance between the fixed lens 210 and the movable lens 310. Of course, in other embodiments, one of the movable bracket 320 and the fixed bracket 220 can be provided with a sliding protrusion, and the other can be provided with a sliding groove extending in the circumferential direction and inclined relative to the axial direction. Through the cooperation of the sliding protrusion and the sliding groove, when the driving member 400 drives the movable bracket 320 to rotate, the movable bracket 320 can simultaneously move axially relative to the fixed bracket 220.

[0031] Without loss of generality, see Figures 2 to 4 The fixed bracket 220 is provided with an internal thread on the side of the fixed lens 210 away from the display module, and the movable bracket 320 is correspondingly provided with an external thread. The movable bracket 320 extends into the fixed bracket 220 and is connected through the external thread and the internal thread. Of course, the fixed bracket 220 may also be provided with an internal thread and the movable bracket 320 may be provided with an external thread.

[0032] In one embodiment, see Figures 1 to 4, one end of the movable bracket 320 is inserted into the fixed bracket 220, the driving member 400 is sleeved on the other end of the movable bracket 320 and sleeved on the outer peripheral side of the fixed bracket 220, and a positioning and matching structure is provided between the driving member 400 and the fixed bracket 220. In this way, when the driving member 400 is rotated, the driving member 400 can be positioned and matched with the fixed bracket 220 at different angles, that is, it can form multiple adjustment gears for the convenience of user adjustment. After the adjustment is in place, the movable bracket 320 and the driving member 400 can also be maintained at the current gear through the positioning and matching structure, thereby ensuring the adjustment reliability of the driving member 400.

[0033] In one embodiment, see Figures 1 to 5 , between the inner circumference of the driving member 400 and the outer circumference of the fixed bracket 220, one is provided with a positioning straight groove 221 extending in the axial direction, and the other is provided with a positioning convex portion 411, and at least one of the positioning straight groove 221 and the positioning convex portion 411 is distributed in a plurality in the circumferential direction, and one positioning convex portion 411 is correspondingly engaged with one positioning straight groove 221. Taking the case where there are a plurality of positioning straight grooves 221 as an example, when the driving member 400 is rotated, since the movable bracket 320 will rotate and move axially relative to the fixed bracket 220 at the same time, after the positioning convex portion 411 slides from one positioning straight groove 221 to another positioning straight groove 221, the axial position of the positioning convex portion 411 relative to the positioning straight groove 221 can also change, ensuring that the driving member 400 can shift the movable bracket 320, and when the position of the movable bracket 320 is adjusted to the right position, the positioning convex portion 411 can engage with the current positioning straight groove 221, so that the movable bracket 320 can be stably in the current position. In addition, when the user rotates the driving member 400, the positioning protrusion 411 slides into or out of the positioning straight groove 221, which can give the user a certain hand feeling feedback, so that the user can adjust conveniently and reliably. Of course, in other embodiments, multiple spaced magnetic suction parts can also be provided, and the gear switching can be achieved by switching the cooperation of the magnetic suction parts.

[0034] Specifically, see Figures 3 to 5 The outer circumference of the fixing bracket 220 is evenly spaced with a plurality of positioning straight grooves 221, and the inner circumference of the driving member 400 is radially oppositely provided with two positioning convex portions 411. In this way, in each gear position, two positioning convex portions 411 cooperate with the positioning straight grooves 221 to play a positioning role, which can enhance the hand-feel feedback effect and improve the reliability of positioning.

[0035] In one embodiment, see Figures 3 to 5, the driving member 400 has an elastic portion 410, and the positioning protrusion 411 is arranged on the elastic portion 410. In this way, after the positioning protrusion 411 slides out of the positioning straight groove 221, the elastic portion 410 can be deformed to reduce the pressing force between the positioning protrusion 411 and the peripheral wall of the fixing bracket 220 outside the positioning straight groove 221, thereby reducing the friction force that the driving member 400 needs to overcome when rotating relative to the fixing bracket 220, so that the user can rotate the driving member 400 more labor-saving and conveniently. After the positioning protrusion 411 slides back into the positioning straight groove 221, the elastic portion 410 can restore the deformation and can be maintained in this state, so that the positioning protrusion 411 can be stably engaged with the positioning straight groove 221. Of course, in other embodiments, it is also possible to set an arc groove between adjacent positioning straight grooves 221 to guide and cooperate with the positioning protrusion 411.

[0036] In one embodiment, see Figures 3 to 5 , corresponding to one of the elastic parts 410, the driving member 400 is provided with two through slots 420 extending in the axial direction, and the through slots 420 penetrate the end side of the driving member 400 facing the display area 110, and the elastic part 410 is formed between the two through slots 420. That is, by providing two through slots 420, the wall between the two through slots 420 has the ability to deform, thereby forming an elastic part 410 similar to an elastic buckle structure. The positioning protrusion 411 is arranged near the end side through which the through slot 420 penetrates, and the elastic part 410 here has a greater deformation ability, so that the user can rotate the driving member 400 more effortlessly. Of course, in other embodiments, the positioning protrusion 411 and the inner peripheral wall of the driving member 400 may also be connected by a spring, and the spring is also the elastic part 410.

[0037] In one embodiment, see Figure 2 , Figure 4 and Figure 5 The outer periphery of the movable bracket 320 is provided with a fixing convex portion 321, and the driving member 400 is provided with a mounting groove 440 correspondingly, and the fixing convex portion 321 is fixed in the mounting groove 440. In this way, the fixed connection between the movable bracket 320 and the driving member 400 can be achieved. The mounting groove 440 has a notch on the side facing the display module 100, so that the fixing convex portion 321 can be inserted into the mounting groove 440. The fixing convex portion 321 can be fixed in the mounting groove 440 by means of glue injection, or by means of wedge surface matching, so that the fixing convex portion 321 can be engaged in the mounting groove 440. Of course, in other embodiments, the driving member 400 and the movable bracket 320 can also be fixed by screw locking.

[0038] In one embodiment, see Figures 1 to 4, the movable bracket 320 is also equipped with a flat mirror 330. The flat mirror 330 can be used to fold the optical path to make the optical path more compact, which is conducive to improving the miniaturization of the display light machine, and can also help correct certain types of aberrations, reduce chromatic aberration or other optical distortions, and improve the overall image quality. Specifically, the driving member 400 is provided with a avoidance port 430, and the flat mirror 330 is installed at the port of the movable bracket 320 away from the fixed bracket 220, and is located at the position of the avoidance port 430. In this way, while the mirror group is covered and protected by the flat mirror 330, the flat mirror 330 will not block the light path, that is, it will not affect the light emission of the display light machine.

[0039] The present invention also proposes a head-mounted display device, which includes a display optical machine. The specific structure of the display optical machine refers to the above embodiment. Since the head-mounted display device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0040] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A display light machine, characterized in that: include: A display module having a display area; A fixed lens, arranged corresponding to the display area and fixed relative to the display module; A movable lens, arranged corresponding to the display area and movable relative to the display module; as well as A driving member, used for driving the movable lens to move; Wherein, at least one of the fixed lens and the movable lens is a convex lens.

2. The display light machine according to claim 1, characterized in that: The display light machine also includes a fixed bracket and a movable bracket, the fixed lens is mounted on the fixed bracket, the movable lens is mounted on the movable bracket, the movable bracket and the fixed bracket are axially movably connected, and the driving member is configured as a knob and is relatively fixed to the movable bracket.

3. The display light machine according to claim 2, characterized in that: The movable bracket is connected to the fixed bracket by threaded connection; And / or, the movable bracket is also equipped with a flat mirror.

4. The display light machine according to claim 2, characterized in that: One end of the movable bracket is inserted into the fixed bracket, the driving member is sleeved on the other end of the movable bracket and sleeved on the outer peripheral side of the fixed bracket, and a positioning matching structure is provided between the driving member and the fixed bracket.

5. The display light machine according to claim 4, characterized in that: Between the inner circumference of the driving member and the outer circumference of the fixing bracket, one is provided with a positioning straight groove extending along the axial direction, and the other is provided with a positioning convex portion. At least one of the positioning straight groove and the positioning convex portion is distributed in plurality along the circumferential direction, and one positioning convex portion is correspondingly engaged with one of the positioning straight grooves.

6. The display light machine according to claim 5, characterized in that: The driving member has an elastic portion, and the positioning protrusion is arranged on the elastic portion.

7. The display light machine according to claim 6, characterized in that: Corresponding to one of the elastic parts, the driving member is provided with two through slots extending in the axial direction, and the through slots penetrate the end side of the driving member facing the display area, and the elastic part is formed between the two through slots.

8. The display light machine according to claim 5, characterized in that: A plurality of the positioning straight grooves are evenly spaced along the circumferential direction on the outer circumferential side of the fixing bracket, and two positioning protrusions are oppositely arranged along the radial direction on the inner circumferential side of the driving member.

9. The display light machine according to claim 4, characterized in that: A fixing convex portion is convexly arranged on the outer periphery of the movable bracket, and a mounting groove is correspondingly arranged on the driving member, and the fixing convex portion is fixed in the mounting groove.

10. A head mounted display device, characterized in that: A display light machine comprising any one of claims 1 to 9.

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