Head mounted display device and zoom lens module

Abstract

The invention discloses a head-mounted display device and a zoom lens module. The zoom lens module includes a base, a first lens frame, a first lens, a flexible zoom tape, a second lens frame, and a second lens. The first lens frame is slidably assembled to the base. The outer peripheral wall of the first lens frame has a plurality of radii of curvature. The flexible zooming belt surrounds the peripheral wall. The guide block of the flexible zoom belt is embedded into the inclined guide groove of the peripheral wall and is suitable for sliding along the inclined guide groove. The second lens frame is assembled to the base. The first lens frame is located between the base and the second lens frame. The flexible zoom band is located between the second lens frame and the first lens frame. The sliding rod of the flexible zoom belt passes through the circumferential slot of the second lens frame and is suitable for sliding along the circumferential slot. When the flexible zooming belt slides on the peripheral wall, the guide block drives the first lens frame to slide in the zooming direction.

Description

Technical Field

[0001] This invention relates to a head-mounted display device and a zoom lens module. Background Technology

[0002] With the rapid advancement of technology, the types and functions of head-mounted display devices are becoming increasingly diverse. Taking the eye mask type of head-mounted display device as an example, when a user wears such a device, the gyroscope and position tracker inside the head-mounted display device will track the user's movement and project corresponding scene images, providing the user with an experience as if they were in a virtual world.

[0003] When using head-mounted displays, since each user has a different degree of myopia, the display should include two zoom lens modules to accommodate different users and ensure the best user experience for each. Currently, zooming is achieved by rotating a circular zoom ring, which in turn rotates and moves a circular lens assembled within the ring. However, increasing the lens area to increase the viewing angle or moving the user's eyes closer to the lens increases the likelihood of the zoom lens module pressing on the user's nose and brow bone. Modifying the lens to be non-circular to solve this problem would prevent the zoom ring from rotating due to its non-circular shape. Summary of the Invention

[0004] This invention relates to a head-mounted display device and a zoom lens module, which can solve the problem that non-circular zoom rings cannot perform zooming.

[0005] The head-mounted display device of the present invention includes a body, a fixing device, and two zoom lens modules. The body has two displays corresponding to both eyes. The fixing device is adapted to fix the body to a user's head. Each zoom lens module includes a base, a first lens frame, a first lens, a flexible zoom band, a second lens frame, and a second lens. The base is assembled to the body and corresponds to one of the two displays. The first lens frame is slidably assembled to the base. The first lens frame is adapted to slide relative to the base along a zoom direction. An outer peripheral wall of the first lens frame has multiple radii of curvature. The outer peripheral wall has an oblique guide groove. The first lens is assembled to the first lens frame. The flexible zoom band surrounds the outer peripheral wall and is adapted to slide against the outer peripheral wall. A slide bar is provided on the outer side of the flexible zoom band. A guide block is provided on the inner side of the flexible zoom band. The guide block is embedded in the oblique guide groove and is adapted to slide along the oblique guide groove. The second lens frame is assembled to the base. The first lens frame is located between the base and the second lens frame. The flexible zoom band is located between the second lens frame and the first lens frame. The second lens frame has a circumferential slot. A sliding rod passes through the circumferential slot and is adapted to slide along the slot. The second lens is mounted on the second lens frame. When the sliding rod is subjected to force and drives the flexible zoom belt to slide on the outer peripheral wall, the guide block drives the first lens frame to slide in the zoom direction.

[0006] The zoom lens module of the present invention includes a base, a first lens frame, a first lens, a flexible zoom band, a second lens frame, and a second lens. The first lens frame is slidably assembled to the base. The first lens frame is adapted to slide relative to the base along a zoom direction. An outer peripheral wall of the first lens frame has multiple radii of curvature. The outer peripheral wall has an oblique guide groove. The first lens is assembled to the first lens frame. The flexible zoom band surrounds the outer peripheral wall and is adapted to slide against the outer peripheral wall. A slider is provided on the outer side of the flexible zoom band. A guide block is provided on the inner side of the flexible zoom band. The guide block is embedded in the oblique guide groove and is adapted to slide along the oblique guide groove. The second lens frame is assembled to the base. The first lens frame is located between the base and the second lens frame. The flexible zoom band is located between the second lens frame and the first lens frame. The second lens frame has a circumferential slot. The slider passes through the circumferential slot and is adapted to slide along the circumferential slot. The second lens is disposed on the second lens frame. When the slider is subjected to force and causes the flexible zoom belt to slide on the outer peripheral wall, the guide block causes the first lens frame to slide in the zoom direction.

[0007] In one embodiment of the invention, the flexible zoom band is made of nylon or metal.

[0008] In one embodiment of the invention, the flexible zoom belt includes a belt body. The belt body surrounds the outer peripheral wall. The two ends of the belt body are adjacent to each other.

[0009] In one embodiment of the invention, the flexible zoom belt further includes a rod. The rod is connected to both ends of the belt and serves as a slide bar.

[0010] In one embodiment of the present invention, the number of guide blocks is multiple, and the number of inclined guide slots corresponds to the number of guide blocks.

[0011] Based on the above, in the head-mounted display device and zoom lens module of the present invention, a flexible zoom band can slide on the outer peripheral wall of the non-circular first lens frame and drive the lens to slide in the zoom direction to achieve the purpose of zooming. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a head-mounted display device according to an embodiment of the present invention;

[0013] Figure 2 yes Figure 1 A diagram showing the disassembled zoom lens module and display of a head-mounted display device;

[0014] Figure 3 yes Figure 2 Front view of the first lens frame of the zoom lens module;

[0015] Figure 4 yes Figure 2 Front view of the flexible zoom belt body of the zoom lens module;

[0016] Figure 5 yes Figure 2 A schematic diagram of the zoom lens module after partial assembly;

[0017] Figure 6 yes Figure 5 A schematic diagram of the zoom lens module after partial assembly from another perspective;

[0018] Figure 7 yes Figure 2 A partial perspective view of the zoom lens module in one state;

[0019] Figure 8 yes Figure 7 A cross-sectional view of the zoom lens module;

[0020] Figure 9 yes Figure 2 A partial perspective view of the zoom lens module in another state;

[0021] Figure 10 yes Figure 9 A cross-sectional view of the zoom lens module. Detailed Implementation

[0022] Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same element references are used in the drawings and description to denote the same or similar parts.

[0023] Figure 1 This is a schematic diagram of a head-mounted display device according to an embodiment of the present invention. Figure 2 yes Figure 1 This is a disassembled diagram showing the zoom lens module and display of a head-mounted display device. Please refer to it. Figure 1 and Figure 2 The head-mounted display device 50 of this embodiment includes a body 52, a fixing device 54, and two zoom lens modules 100. The body 52 has two displays 52A corresponding to both eyes. The fixing device 54 is adapted to fix the body 52 to a user's head. Each zoom lens module 100 includes a base 110, a first lens frame 120, a first lens 130, a flexible zoom band 140, a second lens frame 150, and a second lens 160. Each base 110 is assembled to the body 52 and corresponds to one of the displays 52A.

[0024] In this embodiment, the host device 52 is a head-mounted display, which can be applied to fields such as virtual reality systems, augmented reality systems, or mixed reality systems. Besides the zoom lens module 100, the host device 52 may also include other optical systems and protective housings. In this embodiment, the fixing device 54 is a temple, but in other embodiments, the fixing device may be a headband or other fixing device to secure the host device 52 to the user's head.

[0025] Figure 3 yes Figure 2 Front view of the first lens frame of the zoom lens module. Figure 4 yes Figure 2 The front view of the flexible zoom band of the zoom lens module. Please refer to... Figure 3 and Figure 4 In this embodiment, the outer peripheral wall 122 of the first lens frame 120 has multiple radii of curvature. That is, the outer peripheral wall 122 is not perfectly circular, because it matches the shape of the first lens 130. For example, the outer peripheral wall 122 in this embodiment has an irregular shape, and its radius of curvature is gradually changing, but the present invention is not limited to this. Because the outer peripheral wall 122 of the first lens frame 120 has multiple radii of curvature, a conventional rigid zoom ring with a perfectly circular appearance cannot be used to move the first lens frame 120. However, the flexible zoom band 140 in this embodiment is flexible and can be bent, so the flexible zoom band 140 can wrap around the outer peripheral wall 122 and is suitable for sliding close to the outer peripheral wall 122. Therefore, the flexible zoom band 140 in this embodiment can rotate relative to the first lens frame 120 and is used to move the first lens frame 120 in a zoom direction D10.

[0026] Figure 5 yes Figure 2 The diagram shows a partially assembled zoom lens module. Please refer to it. Figure 2 and Figure 5 In this embodiment, the base 110 has, for example, a space for accommodating the display 52A, thereby fixing the relative position of the base 110 and the display 52A. A first lens 130 is assembled to a first lens frame 120, thereby fixing the relative position of the first lens 130 and the first lens frame 120, and the first lens 130 can move with the first lens frame 120. A second lens 160 is disposed on a second lens frame 150, thereby fixing the relative position of the second lens 160 and the second lens frame 150. The first lens 130 may be composed of one or more lenses, and the second lens 160 may also be composed of one or more lenses.

[0027] Figure 6 yes Figure 5 This is a schematic diagram showing another perspective of the zoom lens module after partial assembly. Please refer to it. Figure 5 and Figure 6 The second lens frame 150 has a circumferential slot 152. That is, the circumferential slot 152 is a strip-shaped opening extending along the outer peripheral wall of the second lens frame 150. The flexible zoom band 140 is adapted to be disposed inside the second lens frame 150. The outer side of the flexible zoom band 140 has a slide bar 142. The slide bar 142 passes through the circumferential slot 152 and is adapted to slide along the circumferential slot 152. Therefore, by moving the slide bar 142 exposed in the circumferential slot 152, the flexible zoom band 140 can be rotated relative to the second lens frame 150.

[0028] Figure 7 yes Figure 2 A partial perspective view of the zoom lens module in one state. Figure 8 yes Figure 7 A cross-sectional view of the zoom lens module. Figure 7 The first lens 130, flexible zoom band 140, second lens frame 150, and second lens 160 are presented in a perspective view to clearly show the connection between the flexible zoom band 140 and the first lens frame 120, as well as the connection between the base 110 and the first lens frame 120. Please refer to [reference needed]. Figure 5 , Figure 7 and Figure 8 The first lens frame 120 is slidably assembled to the base 110. The first lens frame 120 is adapted to slide relative to the base 110 along the zoom direction D10. The outer peripheral wall 122 has an oblique guide groove 122A. The inner side of the flexible zoom band 140 has a guide block 144. The guide block 144 is embedded in the oblique guide groove 122A and adapted to slide along the oblique guide groove 122A. The second lens frame 150 is assembled to the base 110. That is, the relative position and distance between the second lens 160 on the second lens frame 150 and the display 52A on the base 110 are fixed.

[0029] A first lens frame 120 is located between a base 110 and a second lens frame 150. A flexible zoom band 140 is located between the second lens frame 150 and the first lens frame 120. Specifically, in the zoom direction D10, the first lens frame 120 is sandwiched between the base 110 and the second lens frame 150. In the circumferential direction, the first lens frame 120 surrounds a portion of the base 110, the flexible zoom band 140 surrounds the first lens frame 120, and the second lens frame 150 surrounds the flexible zoom band 140. Figure 7 It can be seen that, in this state, the guide block 144 on the inner side of the flexible zoom band 140 is located in the inclined guide groove 122A. Figure 7The lower left side of the first lens frame 120. The relative position of the second lens frame 150 and the base 110 is fixed, and the movement of the flexible zoom band 140 in the zoom direction D10 is also restricted by the second lens frame 150 and the base 110. Therefore, when the guide block 144 of the flexible zoom band 140 is located on the lower side of the oblique guide groove 122A, the first lens frame 120 is maintained on the lower side of the first lens frame 120. Figure 7 The higher side of the lens, that is, the first lens 130, is relatively close to the second lens 160.

[0030] Figure 9 yes Figure 2 A partial perspective view of the zoom lens module in another state. Figure 10 yes Figure 9 A cross-sectional view of the zoom lens module. Please refer to... Figure 5 , Figure 9 and Figure 10 When the slider 142 is subjected to force and drives the flexible zoom belt 140 to slide on the outer peripheral wall 122, the guide block 144 drives the first lens frame 120 to slide in the zoom direction D10. Specifically, when the slider 142 is subjected to force and drives the flexible zoom belt 140 from... Figure 7 Slide to position Figure 9 When in position, guide block 144 from Figure 7 The inclined guide groove 122A moves to the right from a lower position on the left, and the guide block 144 can, for example, remain in the inclined guide groove 122A. Figure 9 The higher side on the right side of the zoom band 140. As the guide block 144 of the flexible zoom band 140 moves towards the higher side on the right side of the oblique guide groove 122A, the guide block 144 applies force to the wall of the oblique guide groove 122A, pushing the first lens frame 120. Although the first lens frame 120 cannot rotate, it will move in the zoom direction D10 towards the higher side. Figure 9 The first lens 130 will move downwards in the zoom direction D10, meaning it will move away from the second lens 160.

[0031] In this way, in the head-mounted display device 50 and zoom lens module 100 of this embodiment, simply moving the slider 142 to rotate the flexible zoom belt 140 can change the relative distance between the first lens 130 and the second lens 160 in the zoom direction D10, thus achieving the purpose of zooming. Therefore, not only can non-circular first lenses 130 and second lenses 160 be used to allow the zoom lens module 100 to be closer to the user's eyes, thereby increasing the lens area and increasing the viewing angle, but the zoom function is also retained. For example, Figure 1 The two zoom lens modules 100 have a relatively flat outer contour on the side closer to the user's brow. For users with a relatively prominent brow, this zoom lens module 100 can be positioned closer to the user's eyes.

[0032] In addition, please refer to Figure 1 and Figure 2 In the head-mounted display device 50 of this embodiment, the two zoom lens modules 100 can zoom independently. When a user has myopia, the zoom lens module 100 can be zoomed to obtain a clear image. Furthermore, even if the user's two eyes have different degrees of myopia, the two zoom lens modules 100 can be zoomed to different degrees individually, so that both eyes can obtain a clear image.

[0033] Please refer to this again. Figure 5 In this embodiment, there are multiple guide blocks 144, and the number of oblique guide grooves 122A corresponds to the number of guide blocks 144. Having a larger number of oblique guide grooves 122A and distributing them as evenly as possible across the entire first lens frame 120 allows for smoother sliding of the first lens frame 120 relative to the base 110. In this embodiment, the flexible zoom band 140 can be made of nylon, metal, or other flexible materials that are not easily compressed in the longitudinal direction to change length. In this embodiment, the flexible zoom band 140 includes a band body 140A. The band body 140A surrounds the outer peripheral wall 122. The two ends of the band body 140A are adjacent to each other. That is, the flexible zoom band 140 can be formed by wrapping the originally straight band body 140A into a circle; this design is easy to manufacture and assemble, and can save costs. In this embodiment, the flexible zoom band 140 may also include a rod body 140B. The rod body 140B is connected to both ends of the band body 140A and serves as a slide rod 142. The rod 140B can be used not only to connect the two ends of the belt 140A, but also to pass through the circumferential slot 152 as a slide rod 142.

[0034] In this embodiment, the first lens frame 120 has a plurality of sliders 124, and the base 110 has a plurality of grooves 112 corresponding to the sliders 124. Each slider 124 is slidably disposed in a groove 112, so as to be suitable for sliding relative to the base 110 along the zoom direction D10.

[0035] In summary, in the head-mounted display device and zoom lens module of the present invention, the outer peripheral wall of the first lens frame is irregularly shaped, suitable for fixing an irregularly shaped lens, and the flexible zoom band is flexible enough to slide snugly against the outer peripheral wall of the first lens frame. Therefore, it allows for an increase in lens area to increase the viewing angle, while also providing zoom functionality.

Claims

1. A head-mounted display device, characterized in that, include: The main body has two displays corresponding to both eyes; A fixing device suitable for securing the body to the user's head; Two zoom lens modules, each zoom lens module comprising: The base is assembled to the main body and corresponds to one of the displays; A first lens frame is slidably assembled to the base, wherein the first lens frame is adapted to slide relative to the base along the zoom direction, and the outer peripheral wall of the first lens frame has a variety of radii of curvature and the outer peripheral wall has an oblique guide groove. The first lens is assembled into the first lens frame; A flexible zoom band is wrapped around the outer peripheral wall and adapted to slide in close contact with the outer peripheral wall, wherein the outer side of the flexible zoom band has a slide bar and the inner side of the flexible zoom band has a guide block, the guide block is embedded in the inclined guide groove and adapted to slide along the inclined guide groove; A second lens frame is assembled to the base, wherein the first lens frame is located between the base and the second lens frame, the flexible zoom band is located between the second lens frame and the first lens frame, the second lens frame has a circumferential slot, and the slide rod passes through the circumferential slot and is adapted to slide along the circumferential slot; and The second lens is assembled to the second lens frame. When the slider is subjected to force and drives the flexible zoom belt to slide on the outer peripheral wall, the guide block drives the first lens frame to slide in the zoom direction.

2. The head-mounted display device as described in claim 1, characterized in that, The materials used for each flexible zoom band include nylon or metal.

3. The head-mounted display device as described in claim 1, characterized in that, Each of the flexible zoom belts includes a belt body that surrounds the outer peripheral wall, and the two ends of the belt body are adjacent to each other.

4. The head-mounted display device as described in claim 3, characterized in that, Each flexible zoom belt also includes a rod, which is connected to both ends of the belt and serves as a slide bar.

5. The head-mounted display device as described in claim 1, characterized in that, There are multiple guide blocks, and the number of inclined guide slots corresponds to the number of guide blocks.

6. A zoom lens module, characterized in that, include: Base; A first lens frame is slidably assembled to the base, wherein the first lens frame is adapted to slide relative to the base along the zoom direction, and the outer peripheral wall of the first lens frame has a variety of radii of curvature and the outer peripheral wall has an oblique guide groove. The first lens is assembled into the first lens frame; A flexible zoom band is wrapped around the outer peripheral wall and adapted to slide in close contact with the outer peripheral wall, wherein the outer side of the flexible zoom band has a slide bar and the inner side of the flexible zoom band has a guide block, the guide block is embedded in the inclined guide groove and adapted to slide along the inclined guide groove; A second lens frame is assembled to the base, wherein the first lens frame is located between the base and the second lens frame, the flexible zoom band is located between the second lens frame and the first lens frame, the second lens frame has a circumferential slot, and the slide rod passes through the circumferential slot and is adapted to slide along the circumferential slot; as well as The second lens is assembled to the second lens frame. When the slider is subjected to force and drives the flexible zoom belt to slide on the outer peripheral wall, the guide block drives the first lens frame to slide in the zoom direction.

7. The zoom lens module as described in claim 6, characterized in that, The flexible zoom band can be made of nylon or metal.

8. The zoom lens module as described in claim 6, characterized in that, The flexible zoom belt includes a belt body that surrounds the outer peripheral wall, with the two ends of the belt body adjacent to each other.

9. The zoom lens module as described in claim 8, characterized in that, The flexible zoom belt also includes a rod that connects to both ends of the belt and serves as a slide bar.

10. The zoom lens module as described in claim 9, characterized in that, There are multiple guide blocks, and the number of inclined guide slots corresponds to the number of guide blocks.

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