Zoom optical system and display device
The variable focus optical system in head-mounted displays adjusts refractive power through movable lens groups and a display screen, addressing diverse user eye conditions and improving user experience by accommodating various vision needs without additional lenses.
Patent Information
- Application Number
- CN202422381516.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-27
AI Technical Summary
The existing head-mounted monitors are difficult to meet the vision needs of different users, especially those with large vision deviations. They need to wear additional corrective glasses to use normally, which affects the user experience.
A zoom optical system is provided, including a display screen and a lens assembly, which consists of a first lens group, a second lens group and a third lens group, and adjusts the diopter by driving the movement of these lens groups and/or the display screen to achieve varying degrees of diopter adjustment.
It realizes adaptation to different groups of vision, expands the adjustment range, so that users do not need to wear correction glasses, and improves the convenience of use and experience.
Smart Images
Figure CN223108145U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of display devices, in particular to a zoom optical system and a display device. Background Art
[0002] With the continuous development of technology, head-mounted displays have been more and more widely used in the fields of virtual reality, augmented reality, game entertainment, etc. However, different users may have different eye conditions, such as myopia, hyperopia, etc. Existing head-mounted displays are difficult to meet the vision needs of a wide range of people. Especially for users with large vision deviations, they may need to wear additional corrective glasses to use the head-mounted display normally, which affects the use experience. Summary of the Utility Model
[0003] The utility model provides a zoom optical system and a display device to solve the problems existing in the prior art.
[0004] To achieve the above object, the utility model provides the following technical solutions:
[0005] A zoom optical system includes a display screen and a lens assembly. The lens assembly includes a first lens group, a second lens group, and a third lens group; there are intervals between the display screen and each lens respectively, and the display screen, the first lens group, the second lens group, and the third lens group can be driven to move to form a change in diopter.
[0006] The zoom optical system has a combination of any two of the following diopter adjustment methods:
[0007] 1) Driving the first lens group to move alone;
[0008] 2) Driving the display screen and the third lens group to move simultaneously, or driving the first lens group and the second lens group to move simultaneously;
[0009] 3) Driving the display screen to move alone, or driving the first lens group, the second lens group, and the third lens group to move simultaneously.
[0010] Optionally, the interval between the first lens group and the second lens group is defined as d1, the change range of d1 is defined as Δd1, and the value range of Δd1 is 0 mm to 3 mm.
[0011] Optionally, the interval between the second lens group and the third lens group is defined as d2, the change range of d2 is defined as Δd2, and the value range of Δd2 is 0 mm to 3 mm.
[0012] Optionally, the distance d3 between the third lens group and the display screen, the variation range of d3 is defined as Δd3, and the value range of Δd3 is 0 mm to 3 mm.
[0013] Optionally, for the zoom optical system under two diopter adjustment modes, the variation amounts of the diopter are ΔF1 and ΔF2 respectively, and the zoom optical system satisfies the following conditions:
[0014] -10D ≤ ΔF1 + ΔF2 ≤ 10D.
[0015] Optionally, the overall optical length of the zoom optical system is defined as TTL, and when performing the first diopter adjustment and / or the second diopter adjustment, the variation amount of the overall optical length of the zoom optical system is defined as ΔTTL; the zoom optical system satisfies the following conditions:
[0016] 0 mm ≤ ΔTTL ≤ 3 mm.
[0017] Optionally, the focal length of the zoom optical system is defined as EFL; the distance between the first lens group and the second lens group is defined as d1, the variation range of d1 is defined as Δd1; the distance between the second lens group and the third lens group is defined as d2, the variation range of d2 is defined as Δd2; the zoom optical system satisfies the following conditions:
[0018] 0 ≤ |Δd1 + Δd2| / EFL ≤ 0.3.
[0019] The focal length of the first lens group is defined as f1, the focal length of the second lens group is defined as f2, and the focal length of the third lens group is defined as f3. The zoom optical system satisfies the following conditions:
[0020] 0 ≤ |f1 + f2 + f3| / EFL ≤ 4.45.
[0021] The present invention also discloses a display device, including the zoom optical system described in any one of the above.
[0022] Compared with the prior art, the present invention has the following beneficial effects:
[0023] The zoom optical system and the display device provided by the present invention have two different diopter adjustment modes, can realize different degrees of diopter adjustment, meet the needs of people with different visions, expand the adjustment range, and make the applicable population wider.
[0024] The present utility model has other characteristics and advantages, which will be apparent from the accompanying drawings incorporated herein and the subsequent detailed description, or will be described in detail in the accompanying drawings incorporated herein and the subsequent detailed description. These drawings and the detailed description together are used to explain the specific principles of the present utility model. Brief Description of the Drawings
[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0026] Figure 1 is a schematic structural diagram of a zoom optical system provided by the present utility model;
[0027] Figure 2 is a schematic structural diagram of a zoom optical system provided in Embodiment 1 of the present utility model;
[0028] Figure 3 is a schematic structural diagram of a zoom optical system provided in Embodiment 2 of the present utility model.
[0029] Reference numerals: 10, display screen; 21, first lens group; 22, second lens group; 23, third lens group; 30, human eye. Detailed Description of the Embodiments
[0030] To describe in detail the possible application scenarios, technical principles, implementable specific solutions, achievable purposes and effects, etc. of the present application, the following will be described in detail in conjunction with the listed specific embodiments and the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, so they are only examples and cannot be used to limit the protection scope of the present application.
[0031] Referring to "embodiment" in this article means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing at various positions in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.
[0032] Unless otherwise defined, the meanings of technical terms used herein are the same as those commonly understood by those skilled in the technical field to which this application belongs; the use of relevant terms herein is only for describing specific embodiments and is not intended to limit this application.
[0033] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: there is A, there is B, and there is both A and B at the same time. In addition, the character " / " in this text generally represents an "or" logical relationship between the associated objects before and after.
[0034] In this application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantitative, primary or secondary, or sequential relationships between these entities or operations.
[0035] Without further limitation, in this application, the expressions "including", "comprising", "having" or other similar expressions used in a statement are intended to cover non-exclusive inclusion. These expressions do not exclude the possibility that there may be additional elements in the process, method or product including the described elements. Thus, a process, method or product including a series of elements may include not only those defined elements, but also other elements not explicitly listed, or elements inherent to such process, method or product.
[0036] Similar to the understanding in the "Examination Guidelines", in this application, expressions such as "greater than", "less than", "exceeding" are understood not to include the number itself; expressions such as "above", "below", "within" are understood to include the number itself. In addition, in the description of the embodiments of this application, the meaning of "a plurality of" is two or more (including two). Similar expressions related to "many", such as "multiple groups", "multiple times", etc., are understood in the same way, unless otherwise specifically defined.
[0037] In the description of the embodiments of this application, the spatially related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiment or the accompanying drawings. This is only for the convenience of describing the specific embodiments of this application or for the reader's understanding, and does not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of this application.
[0038] Unless otherwise clearly specified or limited, in the description of the embodiments of this application, terms such as "installation", "connection", "linkage", "fixation", "setting" shall be understood in a broad sense. For example, the "connection" may be a fixed connection, a detachable connection, or an integral setting; it may be a mechanical connection, an electrical connection, or a communication connection; it may be a direct connection, or an indirect connection through an intermediate medium; it may be the communication inside two components or the interaction relationship between two components. For those skilled in the art to which this application belongs, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.
[0039] Please refer to Figure 1 , the present utility model relates to a zoom optical system, which includes a display screen 10 and a lens assembly.
[0040] Specifically, the lens assembly includes a first lens group 21, a second lens group 22, and a third lens group 23 arranged in sequence from the side of the human eye 30 to the direction of the display screen 10, the first lens group 21, the second lens group 22, and the third lens group 23; wherein, specifically, the display screen 10 serves as a display source of an image and is used to emit light to the lens assembly; each of the first lens group 21, the second lens group 22, and the third lens group may include one or more lenses, and each lens has the same or different refractive indices.
[0041] There are intervals between the display screen and each lens respectively, and the display screen, the first lens group, the second lens group, and the third lens group can be driven to move to form a change in diopter;
[0042] The zoom optical system has a combination of any two of the following diopter adjustment methods:
[0043] 1) Driving the first lens group to move alone;
[0044] 2) Driving the display screen and the third lens group to move simultaneously, or driving the first lens group and the second lens group to move simultaneously;
[0045] 3) Driving the display screen to move alone, or driving the first lens group, the second lens group, and the third lens group to move simultaneously.
[0046] The first lens group 21 includes a first lens. The first surface of the first lens facing the human eye 30 is convex, and the second surface facing the display screen 10 is also convex, which helps to converge and focus light, improving the clarity and brightness of the image. The second lens group 22 includes a second lens. The third surface of the second lens facing the human eye 30 is concave, and the fourth surface facing the display screen 10 is flat or convex, which can effectively correct the propagation direction of light, reducing aberration and distortion. The third lens group 23 includes a third lens. The fifth surface of the third lens facing the human eye 30 is convex, and the sixth surface facing the display screen 10 is flat or convex. The third lens group 23 can work in cooperation with the first lens group 21 and the second lens group 22 to further optimize the optical performance.
[0047] In the present utility model, there are intervals respectively between the display screen 10, the first lens group 21, the second lens group 22 and the third lens group 23.
[0048] Among them, the display screen 10, the first lens group 21, the second lens group 22 and the third lens group 23 can all be adjusted in position, and drivers, such as micro-motor drivers, piezoelectric drivers or electromagnetic drivers, etc., are provided on the display screen 10, the first lens group 21, the second lens group 22 and the third lens group 23 to realize the position adjustment of each component.
[0049] By driving one or more of the display screen 10, the first lens group 21, the second lens group 22 and the third lens group 23 to make position adjustments, corresponding diopter adjustments can be realized to meet the needs of users with different visual acuities.
[0050] Next, two implementation methods for the diopter adjustment of the zoom optical system provided by the present utility model will be introduced respectively.
[0051] When performing the first diopter adjustment, the adjustment methods include:
[0052] Method 1: Drive the display screen 10 alone to change the third interval d3 between the third lens group 23 and the display screen 10, thereby realizing the first diopter adjustment. For example, when it is necessary to increase the positive diopter, move the display screen 10 in the direction close to the third lens group 23 to make the light more convergent.
[0053] Method 2: Drive the first lens group 21, the second lens group 22 and the third lens group 23 simultaneously to change the third interval d3, thereby realizing the first diopter adjustment. This adjustment method can adjust the diopter more quickly.
[0054] Method 3: Independently drive the first lens group 21 to change the first interval d1 between the first lens group 21 and the second lens group 22. In this method, by changing the position of the first lens group 21, the propagation path of light and the focal point are adjusted, thereby achieving the adjustment of the diopter.
[0055] Method 4: Simultaneously drive the first lens group 21 and the second lens group 22. There are two adjustment cases. One is that the first lens group 21 and the second lens group 22 are simultaneously driven the same displacement, and the distance between the first lens group 21 and the second lens group 22 remains unchanged. The other is that the first lens group 21 and the second lens group 22 are simultaneously driven different displacements, and the distance between the first lens group 21 and the second lens group 22 changes. Both adjustment cases cause the second interval d2 to change. This adjustment method can comprehensively consider the functions of the two lenses respectively, thereby achieving a more comprehensive adjustment of the diopter.
[0056] When performing the second diopter adjustment, the adjustment methods include:
[0057] Method 1: Simultaneously drive the display screen 10 and the third lens group 23. There are two adjustment cases. One is that the display screen 10 and the third lens group 23 are simultaneously driven the same displacement, and the distance between the display screen 10 and the third lens group 23 remains unchanged. The other is that the display screen 10 and the third lens group 23 are simultaneously driven different displacements, and the distance between the display screen 10 and the third lens group 23 changes. Both adjustment cases cause the second interval d2 to change, achieving the second diopter adjustment. For example, when increasing the negative diopter, move the display screen 10 and the third lens group 23 away from the second lens group 22 at the same time to make the light more divergent.
[0058] Method 2: Simultaneously drive the first lens group 21 and the second lens group 22. There are two adjustment cases. One is that the first lens group 21 and the second lens group 22 are simultaneously driven the same displacement, and the distance between the first lens group 21 and the second lens group 22 remains unchanged. The other is that the first lens group 21 and the second lens group 22 are simultaneously driven different displacements, and the distance between the first lens group 21 and the second lens group 22 changes. Both adjustment cases cause the second interval d2 to change to achieve the adjustment of the diopter.
[0059] Method 3: Independently drive the first lens group 21 to change the first interval d1. By changing the position of the first lens group 21, the propagation path of light is adjusted to achieve the adjustment of the diopter.
[0060] Method 4: Independently drive the display screen 10 to change the third interval d3. It is similar to Method 1 in the first diopter adjustment, but the adjustment direction is opposite to achieve the adjustment of the diopter.
[0061] Further, in the present utility model, the variation ranges of the first interval d1 between the first lens group 21 and the second lens group 22, the second interval d2 between the second lens group 22 and the third lens group 23, and the third interval d3 between the third lens group 23 and the display screen 10 are respectively defined as Δd1, Δd2, and Δd3.
[0062] Among them, the value range of Δd1 is 0 mm - 3 mm, the value range of Δd2 is 0 mm - 3 mm, and the value range of Δd3 is 0 mm - 3 mm. By displaying the variation amounts of each spacing, it is beneficial to ensure the stability and reliability of the optical system during diopter adjustment, and at the same time avoid the decline in image quality and unstable optical performance caused by excessive adjustment.
[0063] Further, in the present utility model, the variation amount of the first diopter adjustment is ΔF1, and the variation amount of the second diopter adjustment is ΔF2. ΔF1 and ΔF2 satisfy the following conditions: -10 D ≤ ΔF1 + ΔF2 ≤ 10 D; this value range can adapt to a wider range of people with eye degrees and meet the needs of users with different vision requirements.
[0064] Further, in the present utility model, the overall optical length of the zoom optical system is defined as TTL. When performing the first diopter adjustment and / or the second diopter adjustment, the variation amount of the overall optical length is defined as ΔTTL, and ΔTTL satisfies the following conditions: 0 mm ≤ ΔTTL ≤ 3 mm. This limiting condition can ensure that the overall size of the optical system does not change too much during the diopter adjustment process.
[0065] Further, in the present utility model, the focal length of the zoom optical system is defined as EFL, and EFL satisfies 0 ≤ |Δd1 + Δd2| / EFL ≤ 0.3. At the same time, the focal length of the first lens group 21 is defined as f1, the focal length of the second lens group 22 is defined as f2, and the focal length of the third lens group 23 is defined as f3, satisfying 0 ≤ |f1 + f2 + f3| / EFL ≤ 4.45. It can be understood that the foregoing conditions can ensure excellent ergonomic performance.
[0066] A zoom optical system provided by the present utility model has two different diopter adjustment methods. On the one hand, different adjustment methods can be finely adjusted according to different vision requirements: for example, for people with mild vision problems, a relatively gentle adjustment method can be adopted; while for people with more serious vision problems, a more targeted adjustment method can be selected. On the other hand, the combined use of different adjustment methods can cover a wider diopter range. Through the moving combination of different lens groups and the position adjustment of the display screen, diopter adjustments of different degrees from low to high are realized, meeting the needs of people with different vision conditions, expanding the diopter adjustment range, and thus making the adaptable population wider.
[0067] Embodiment 1
[0068] Please refer to Table 1 below for reference and Figure 2 , Table 1 shows the specific values of the parameters and relationships in this embodiment, Figure 2 which is a schematic structural diagram of the zoom optical system in this embodiment.
[0069]
[0070] Table 1
[0071] Embodiment 2
[0072] Please refer to Table 2 below for reference and Figure 3 , Table 2 shows the specific values of the parameters and relationships in this embodiment, Figure 3 which is a schematic structural diagram of the zoom optical system in this embodiment.
[0073]
[0074] Table 2
[0075] Embodiment 3
[0076] Based on the foregoing embodiments, the embodiment of the present utility model further provides a display device. By applying the zoom optical system in the foregoing embodiments to the display device, a head-mounted display, a virtual reality device, an augmented reality device, etc. with an adaptive diopter adjustment function can be obtained. Users can adjust the diopter of the optical system according to their own vision conditions, thereby obtaining a clear and comfortable visual experience.
[0077] Through the combination of the first diopter adjustment and the second diopter adjustment in this embodiment, a diopter range from -10D to 10D can be satisfied, adapting to people with myopia, hyperopia, etc. The user group is extensive, and there is no need for users to wear corrective glasses additionally, improving the convenience and experience.
[0078] Finally, it should be noted that although the above embodiments have been described in the text of the specification and the drawings of the present application, the patent protection scope of the present application cannot be limited thereby. Any technical solution obtained by replacing or modifying the equivalent structure or equivalent process using the content recorded in the text of the specification and the drawings of the present application based on the essential concept of the present application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, etc., are all included in the patent protection scope of the present application.
Claims
1. A zoom optical system, characterized in that, It includes a display screen and a lens assembly, and the lens assembly includes a first lens group, a second lens group, and a third lens group; there are intervals between the display screen and each lens respectively, and the display screen, the first lens group, the second lens group, and the third lens group can be driven to move to form a change in diopter. The zoom optical system has a combination of any two of the following diopter adjustment methods: 1) Driving the first lens group to move alone; 2) Driving the display screen and the third lens group to move simultaneously, or driving the first lens group and the second lens group to move simultaneously; 3) Driving the display screen to move alone, or driving the first lens group, the second lens group, and the third lens group to move simultaneously.
2. The zoom optical system according to claim 1, wherein The interval between the first lens group and the second lens group is defined as d1, the change range of d1 is defined as Δd1, and the value range of Δd1 is 0 mm to 3 mm.
3. The zoom optical system according to claim 1, wherein The interval between the second lens group and the third lens group is defined as d2, the change range of d2 is defined as Δd2, and the value range of Δd2 is 0 mm to 3 mm.
4. The zoom optical system according to claim 1, characterized in that, The interval d3 between the third lens group and the display screen, the change range of d3 is defined as Δd3, and the value range of Δd3 is 0 mm to 3 mm.
5. The zoom optical system according to claim 1, characterized in that, When the zoom optical system is in two diopter adjustment methods, the change amount of the first diopter adjustment is ΔF1, and the change amount of the second diopter adjustment is ΔF2. The zoom optical system satisfies the following conditions: -10D ≤ ΔF1 + ΔF2 ≤ 10D.
6. The zoom optical system according to claim 5, characterized in that, The overall optical length of the zoom optical system is defined as TTL. When performing the first diopter adjustment and / or the second diopter adjustment, the change amount of the overall optical length of the zoom optical system is defined as ΔTTL; the zoom optical system satisfies the following conditions: 0 mm ≤ ΔTTL ≤ 3 mm.
7. The zoom optical system according to claim 1, wherein The focal length of the zoom optical system is defined as EFL; the interval between the first lens group and the second lens group is defined as d1, the change range of d1 is defined as Δd1; the interval between the second lens group and the third lens group is defined as d2, the change range of d2 is defined as Δd2; the zoom optical system satisfies the following conditions: 0 ≤ |Δd1 + Δd2| / EFL ≤ 0.3; The focal length of the first lens group is defined as f1, the focal length of the second lens group is defined as f2, and the focal length of the third lens group is defined as f3. The zoom optical system satisfies the following conditions: 0 ≤ |f1 + f2 + f3| / EFL ≤ 4.
45.
8. A display device, characterized in that, It includes the zoom optical system according to any one of claims 1 to 7.