TWI828418B - Head-mounted display device and adjustment module - Google Patents

Abstract

A head-mounted display device and an adjustment module are provided. The head-mounted display device includes a body and two adjustment modules. The two adjustment modules are respectively used to be assembled to two zoom lens groups of the body. Each adjustment module includes a base, a sliding block, a first shape memory alloy (SMA) element, a first recovery element, a braking element, a second shape memory alloy (SMA) element and a second recovery element. The first SMA element is connected between the base and an actuating end of the sliding block, and is used for actuating the sliding block so that a transmission end of the sliding block drives the zoom lens group to zoom. The first recovery element is connected between the base and the actuating end, and is used for keeping the sliding block at an original position when the first SMA element is in a power-off state. When the braking element is in the braking position, a braking end of the sliding block is engaged. The braking element is disengaged from the braking end when in the movable position. The second SMA element is connected between the base and the braking element for actuating the braking element to move between the braking position and the movable position. The second recovery element is connected between the base and the braking element for keeping the braking element at the braking position or the movable position when the second SMA element is in a power-off state.

Description

Head-mounted display device and adjustment module

The present invention relates to a head-mounted display device and an adjustment module, and in particular, to an automatically zooming head-mounted display device and an adjustment module.

With the rapid advancement of current technology, the types and functions of head-mounted display devices are becoming increasingly diversified. Taking a goggle-type 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 to display the corresponding scene image, providing Users experience it as if they are in a virtual world.

When using a head-mounted display device, since each user has different degrees of myopia, two zoom lens groups can be provided in the head-mounted display device to suit different users, so that each user can get the best results. Best user experience. Currently, head-mounted display devices mainly zoom the zoom lens group manually. However, users may not necessarily be able to obtain the best zoom effect manually.

The invention provides a head-mounted display device and an adjustment module to provide an electric zoom function.

The head-mounted display device of the present invention includes a body and two adjustment modules. The main body has two zoom lens groups corresponding to both eyes. The two adjustment modules are respectively used to assemble the two zoom lens groups. Each adjustment module includes a base, a slider, a first shape memory alloy element (SMA element), a first reset element, a braking element, a second shape memory alloy element and a Second reset member. The slider has a driving end, a braking end and a transmission end. The first shape memory alloy piece is connected between the base and the actuating end, and is used to actuate the slider to drive the corresponding zoom lens group to zoom from the transmission end. The first reset component is connected between the base and the actuating end, and is used to keep the slider in an original position when the first shape memory alloy component is in a power-off state. The braking part engages the braking end when in a braking position. The braking part is separated from the braking end when in a movable position. The second shape memory alloy component is connected between the base and the braking component, and is used to actuate the braking component to move between the braking position and the movable position. The second reset component is connected between the base and the braking component, and is used to keep the braking component in the braking position or the movable position when the second shape memory alloy component is in a power-off state.

The adjustment module of the present invention is used to be assembled into a zoom lens group of the head-mounted display device. The adjustment module includes a base, a slider, a first shape memory alloy part, a first reset part, a braking part, a second shape memory alloy part and a second reset part. The slider has a driving end, a braking end and a transmission end. The first shape memory alloy piece is connected between the base and the actuating end, and is used to actuate the slider to drive the zoom lens group to zoom from the transmission end. The first reset component is connected between the base and the actuating end, and is used to keep the slider in an original position when the first shape memory alloy component is in a power-off state. The braking member engages the braking end when in a braking position. The braking part is separated from the braking end when in a movable position. The second shape memory alloy component is connected between the base and the braking component, and is used to actuate the braking component to move between the braking position and the movable position. The second reset component is connected between the base and the braking component, and is used to keep the braking component in the braking position or the movable position when the second shape memory alloy component is in a power-off state.

In one embodiment of the present invention, the first shape memory alloy part and the first reset part are respectively connected to opposite sides of the actuating end.

In an embodiment of the invention, the transmission end is in the shape of a rack.

In an embodiment of the present invention, each adjustment module further includes a position sensor assembled to the base for sensing the position of the slider.

In an embodiment of the invention, the braking component has a pivot end, a first protrusion and a second protrusion. The second shape memory alloy piece is connected between the base and the first bump. The second reset component is connected between the base and the second protrusion. The second shape memory alloy part is heated by electricity and then shrinks to actuate the braking part to rotate toward the movable position. After the second shape memory alloy part is powered off, the second reset part contracts to actuate the braking part to rotate toward the braking position.

In an embodiment of the present invention, the second shape memory alloy part and the second restoring part are in a linear shape.

In an embodiment of the present invention, the material of the second restoring component is shape memory alloy.

In an embodiment of the invention, the braking component has a positioning groove. The base has a bump. When the braking member is in the braking position, the bump is located at a first end of the positioning groove. When the braking member is in the movable position, the bump is located at a second end of the positioning groove. A neck portion of the positioning groove is located between the first end and the second end. The width of the neck is slightly smaller than the width of the bumps.

Based on the above, in the head-mounted display device and adjustment module of the present invention, the first shape memory alloy component can drive the zoom lens group to zoom, and the second shape memory alloy component can drive the braking component to allow zooming or prohibit zooming, so as to achieve Purpose of electric zoom.

FIG. 1 is a schematic diagram of a head-mounted display device according to an embodiment of the present invention. Please refer to FIG. 1 . The head-mounted display device 100 of this embodiment includes a body 110 and two adjustment modules 120 . The body 110 has a zoom lens group 112 and a zoom lens group 114 corresponding to both eyes. The two adjustment modules 120 are respectively assembled to the zoom lens group 112 and the zoom lens group 114 . That is, one adjustment module 120 is assembled to the zoom lens group 112 , and the other adjustment module 120 is assembled to the zoom lens group 114 . The zoom lens group 112 and the zoom lens group 114 can perform zooming independently.

FIG. 2 is a schematic diagram of some components of the adjustment module 120 of the head-mounted display device 100 of FIG. 1 . FIG. 3 is a schematic diagram of another part of the components of the adjustment module 120 of the head-mounted display device 100 of FIG. 1 . Please refer to Figures 2 and 3. Each adjustment module 120 of this embodiment includes a base 122, a slider 124, a first shape memory alloy element (SMA element) 126A, a first The reset part 126B, a braking part 128, a second shape memory alloy part 126C and a second reset part 126D. In FIG. 2 , the components located in front of the base 122 are omitted, and the base 122 is presented in a see-through state to clearly display the components behind the base 122 . In FIG. 3 , the base 122 is presented in a non-transparent state, so the components behind the base 122 cannot be seen.

Please refer to FIGS. 1 and 2 , the slider 124 has an actuating end 124A, a braking end 124C and a transmission end 124B. The first shape memory alloy part 126A is connected between the base 122 and the actuating end 124A, and is used to actuate the slider 124 so that the transmission end 124B drives the corresponding zoom lens group 112 or the zoom lens group 114 to zoom. Applying electricity to the first shape memory alloy part 126A can increase its temperature, and the length of the first shape memory alloy part 126A will also change accordingly, thereby driving the slider 124 to move. The first reset component 126B is connected between the base 122 and the actuating end 124A, and is used to maintain the slider 124 in an original position when the first shape memory alloy component 126A is in a power-off state. Here, the specific position of the original position is not limited, as long as the first shape memory alloy part 126A is in the power-off state, the slider 124 is simultaneously exerted by the first shape memory alloy part 126A and the first reset part 126B to reach the force. The balanced position is the original position. The original position will be changed by various parameters such as materials and sizes of the first reset component 126B and the first shape memory alloy component 126A. In addition, the first reset member 126B keeps the slider 124 at the original position, which means that the slider 124 has a tendency to move to the original position and stop at the original position. However, the slider 124 may not reach the original position if it is acted upon by other external forces, such as the actuation member mentioned later.

Please refer to FIGS. 1 and 3 , the braking member 128 engages the braking end 124C in a braking position. The braking member 128 in Figure 3 is in the braking position, and it engages the braking end 124C. The braking member 128 is separated from the braking end 124C in a movable position, such as the position of the braking member 128 in FIGS. 7 and 9 . In fact, as long as the braking member 128 and the braking end 124C are in a separated state, it is a movable position. The second shape memory alloy component 126C is connected between the base 122 and the braking component 128 for actuating the braking component 128 to move between the braking position and the movable position. The second reset component 126D is connected between the base 122 and the braking component 128 to keep the braking component 128 in the braking position or the movable position when the second shape memory alloy component 126C is in a power-off state.

For example, in this embodiment, when the second shape memory alloy part 126C is electrically heated, it will shrink so that the actuating brake part 128 is in a movable position, and the second reset part 126D will be in a de-energized state when the second shape memory alloy part 126C is powered on. In this state, the braking member 128 is kept in the braking position. The second reset member 126D keeps the braking member 128 in the braking position, which means that the braking member 128 has a tendency to move to the braking position and stop in the braking position. However, if acted upon by other external forces, the braking member 128 may not reach the movable position.

In the head-mounted display device and the adjustment module of this embodiment, the zoom lens group 112 and the zoom lens group 114 can independently perform zooming through their respective matching adjustment modules 120 . Therefore, when the user has myopia problem, the zoom lens group 112 and the zoom lens group 114 can be zoomed to obtain a clear image. Moreover, even if the degree of myopia of the user's eyes is different, the zoom lens group 112 and the zoom lens group 114 can be zoomed individually, so that both eyes can obtain clear images. In addition, because the first shape memory alloy part 126A is used to drive the slider 124 to perform zooming, zooming can be performed in an electric manner with better accuracy. In addition, because the second shape memory alloy component 126C is used to drive the braking component 128 to allow zooming or prohibit zooming, both the zoom lens group 112 and the zoom lens group 114 can be maintained in a zoom state suitable for the user.

FIG. 4 is a schematic cross-sectional view illustrating the operations of the adjustment module and the zoom lens group of the head-mounted display device in FIG. 1 . FIG. 5 is a schematic diagram of another cross section of FIG. 4 . Please refer to FIGS. 4 and 5 . In this embodiment, the first shape memory alloy component 126A and the first reset component 126B are respectively connected to opposite sides of the actuating end 124A. Of course, the first shape memory alloy component 126A and the first reset component 126B can also be connected to the same side of the actuating end 124A or to other different orientations, and the present invention is not limited thereto. In this embodiment, the transmission end 124B is in the shape of a rack. Correspondingly, the outer portion of the focus ring 112A of the zoom lens group 112 is gear-shaped, so the transmission end 124B can engage the focus ring 112A of the zoom lens group 112 and rotate the focus ring 112A.

In this embodiment, the first shape memory alloy part 126A is electrically heated and then shrinks to drive the actuating end 124A. However, in other embodiments, the first shape memory alloy piece 126A can also be designed to be electrically heated and then elongated to push the actuating end 124A.

In the state of FIG. 4 and FIG. 5 , the braking member 128 is in the braking position and engages the braking end 124C of the slider 124 . Therefore, the slider 124 cannot move, which also prevents the focus ring 112A of the zoom lens group 112 from rotating, thereby fixing the position of the lens 112B corresponding to the focus ring 112A.

FIG. 6 is another cross-sectional schematic diagram illustrating the operation of the adjustment module and the zoom lens group of the head-mounted display device in FIG. 1 . FIG. 7 is another cross-sectional schematic diagram of FIG. 6 . In the states of FIG. 6 and FIG. 7 , the braking member 128 is in the movable position and separated from the slider 124 . Therefore, the slider 124 can move, and can also rotate the focus ring 112A of the zoom lens group 112, and then move the lens 112B corresponding to the focus ring 112A, for example, move upward from the position shown in Figure 5 to the position shown in Figure 7 . In other embodiments, the slider 124 can also drive other lenses in the zoom lens group 112 to achieve the zoom function.

8 to 10 are schematic diagrams of three states of the adjustment module of the head-mounted display device of FIG. 1 . Please refer to FIG. 8 . In this embodiment, the braking member 128 has a pivot end 128A, a first protrusion 128B and a second protrusion 128C. The braking member 128 is pivotally connected to the base 122 with the pivot end 128A, that is, the braking member 128 can rotate relative to the base 122 with the pivot end 128A as a rotation axis. The second shape memory alloy piece 126C is connected between the base 122 and the first bump 128B. The second reset member 126D is connected between the base 122 and the second bump 128C. In this embodiment, the second shape memory alloy member 126C and the second reset member 126D are linear and bypass the first bump 128B and the second bump 128C respectively, but the invention is not limited thereto.

Therefore, when the second shape memory alloy member 126C is electrically heated and shrinks, the first bump 128B will be pushed to cause the braking member 128 to rotate in one direction, for example, toward a direction in which it can be separated from the braking end 124C. When the second reset member 126D is electrically heated and shrinks, the second protrusion 128C will be pushed to cause the braking member 128 to rotate in another direction, for example, toward a direction in which the braking end 124C can be engaged. In this embodiment, the material of the second reset member 126D is a shape memory alloy, but the invention is not limited thereto. In an embodiment not shown, a torsion spring may also be provided at the pivot end 128A to replace or assist the second return member 126D to provide the braking member 128 with torque so that it faces when being braked by the second shape memory alloy member 126C. Turn in the opposite direction.

In this embodiment, the base 122 has a bump 122A. The braking member 128 further has a positioning groove 128D. The protrusion 122A is accommodated in the positioning groove 128D, and the protrusion 122A and the positioning groove 128D are relatively movable. The positioning groove 128D has a first end 128D1, a second end 128D2 and a neck 128D3. The neck 128D3 is located between the first end 128D1 and the second end 128D2. The width of neck 128D3 is slightly less than the width of bump 122A. Therefore, after the bump 122A passes through the neck 128D3, it can stably stay at the first end 128D1 or the second end 128D2.

Please refer to FIGS. 5 and 8 . Before activation, the braking member 128 is in the braking position and engages the braking end 124C, so that the slider 124 cannot move, thereby fixing the position of the lens 112B corresponding to the focus ring 112A of the zoom lens group 112 . When the braking member 128 is in the braking position, the bump 122A is located at the first end 128D1 of the positioning groove 128D. When the protrusion 122A is located at the first end 128D1 of the positioning groove 128D, the neck 128D3 can lock the protrusion 122A at the first end 128D1 of the positioning groove 128D, so that the braking member 128 is positioned in the braking position.

Referring to Figures 7 and 9, when the user inputs a zoom command, for example, the second shape memory alloy component 126C is electrically heated to shrink, and the second reset component 126D made of a general elastic material is stressed and elastic. The second reset part 126D is extended or made of shape memory alloy and is in a power-off state, so that the second shape memory alloy part 126C actuates the braking part 128 to rotate toward the movable position. That is, the second shape memory alloy part 126C will push the first bump 128B to rotate the braking part 128 in a direction that can be separated from the braking end 124C. When the braking member 128 reaches the movable position, the bump 122A passes through the neck 128D3 and reaches the second end 128D2. When the protrusion 122A is located at the second end 128D2 of the positioning groove 128D, the neck 128D3 can lock the protrusion 122A at the second end 128D2 of the positioning groove 128D, so that the braking member 128 is positioned in the movable position.

In this embodiment, when the second reset member 126D is also a shape memory alloy, the width of the neck portion 128D3 is slightly smaller than the width of the bump 122A. Therefore, after the bump 122A passes through the neck 128D3, it can stably stay at the first end 128D1 or the second end 128D2. In other words, when the second shape memory alloy part 126C and the second reset part 126D made of the shape memory alloy are powered off, the bump 122A can stably stay on the first end 128D1 or the second end 128D2 to save power consumption. And extend the service life of the second shape memory alloy part 126C and the second reset part 126D.

Then, please refer to FIG. 6 , the first shape memory alloy part 126A is electrically heated to shorten it, and then drives the slider 124 away from the position shown in FIG. 5 . During the movement of the slider 124, the focus ring 112A of the zoom lens group 112 will also be rotated, thereby moving the lens 112B corresponding to the focus ring 112A. The stop timing of the movement of the slider 124 is determined by the user based on the clarity of the image he or she views, for example. The user can also control the slider 124 to move forward or reverse to find the state where the clearest image can be seen. Alternatively, the stop timing of the movement of the slider 124 may be that the user directly inputs the myopia degree, and the head-mounted display device 100 directly controls the slider 124 to stop it at the point corresponding to the myopia degree input by the user. Location. In this embodiment, each adjustment module 120 may further include a position sensor 129 (as shown in FIG. 7 ), assembled to the base 122 for sensing the position of the slider 124 . Therefore, the head mounted display device 100 can sense whether the slider 124 has moved to the position and stop it in the position. For example, the position sensor 129 may be a variable resistor, an optical sensor, or a Hall sensor.

Please refer to Figure 10. When the zoom is completed, for example, the second shape memory alloy component 126C is powered off, and the second reset component 126D, which is made of a general elastic material, contracts with its elastic restoring force, or is made of a shape memory alloy. The second reset member 126D is electrically heated and contracts, so as to actuate the braking member 128 to rotate toward the braking position. That is, the second reset member 126D will push the second protrusion 128C to rotate the braking member 128 in a direction that can engage the braking end 124C until the braking member 128 engages the braking end 124C. At this time, the slider 124 cannot move, so the position of the lens 112B (marked in FIG. 5 ) corresponding to the focus ring 112A of the zoom lens group 112 is fixed, and the user can stably see clear images. In other words, in this embodiment, when in the braking position, the first shape memory alloy part 126A and the second shape memory alloy part 126C can be powered off to save power consumption and extend service life.

In one embodiment, the user directly inputs the degree of myopia, and the head-mounted display device 100 directly controls the movement of the slider 124 . If the position sensor 129 detects that the slider 124 has reached the target position, the second shape memory alloy part 126C is powered off, so that the second reset part 126D actuates the braking part 128 to rotate toward the braking position, and the entire action is completed. .

To sum up, in the head-mounted display device and adjustment module of the present invention, the user can electronically control the first shape memory alloy component to zoom the zoom lens group, and can also electronically control the second shape memory alloy component to allow the zoom lens group to zoom. Zooming or disabling zooming can improve the convenience of use and provide a more precise zooming effect.

100:Head mounted display device 110:Ontology 112,114:Zoom lens group 112A: Focus ring 112B:Lens 120:Adjust the module 122:Pedestal 122A: Bump 124:Slider 124A: Actuating end 124B: Transmission end 124C: Braking end 126A: The first shape memory alloy part 126B: First reset piece 126C: Second shape memory alloy part 126D: Second reset piece 128:brake parts 128A: Pivot end 128B: First bump 128C: Second bump 128D: Positioning slot 128D1: first end 128D2:Second end 128D3: Neck 129: Position sensor

FIG. 1 is a schematic diagram of a head-mounted display device according to an embodiment of the present invention. FIG. 2 is a schematic diagram of some components of the adjustment module of the head-mounted display device of FIG. 1 . FIG. 3 is a schematic diagram of another component of the adjustment module of the head-mounted display device of FIG. 1 . FIG. 4 is a schematic cross-sectional view illustrating the operations of the adjustment module and the zoom lens group of the head-mounted display device in FIG. 1 . FIG. 5 is a schematic diagram of another cross section of FIG. 4 . FIG. 6 is another cross-sectional schematic diagram illustrating the operation of the adjustment module and the zoom lens group of the head-mounted display device in FIG. 1 . FIG. 7 is another cross-sectional schematic diagram of FIG. 6 . 8 to 10 are schematic diagrams of three states of the adjustment module of the head-mounted display device of FIG. 1 .

100:Head mounted display device

110:Ontology

112,114:Zoom lens group

120:Adjust the module

Claims (16)

A head-mounted display device, including: A body with two zoom lens groups corresponding to both eyes; and Two adjustment modules are respectively used to be assembled into the zoom lens groups, wherein each adjustment module includes: a base; A slide block has an actuating end, a braking end and a transmission end; A first shape memory alloy component is connected between the base and the actuating end, and is used to actuate the slider to drive the corresponding zoom lens group to zoom from the transmission end; A first reset member, connected between the base and the actuating end, is used to maintain the slider in an original position when the first shape memory alloy member is in a power-off state; A braking component, wherein the braking component engages the braking end when in a braking position, and the braking component is separated from the braking end when in a movable position; A second shape memory alloy piece is connected between the base and the braking member for actuating the braking member to move between the braking position and the movable position; and A second reset component is connected between the base and the braking component to keep the braking component in the braking position or the movable position when the second shape memory alloy component is in a power-off state. The head-mounted display device of claim 1, wherein the first shape memory alloy component and the first reset component are respectively connected to opposite sides of the actuating end. The head-mounted display device as claimed in claim 1, wherein the transmission end is in the shape of a rack. The head-mounted display device of claim 1, wherein each adjustment module further includes a position sensor assembled to the base for sensing the position of the slider. The head-mounted display device of claim 1, wherein the braking member has a pivot end, a first protrusion and a second protrusion, and the second shape memory alloy member is connected to the base and the third Between a bump, the second reset member is connected between the base and the second bump. The second shape memory alloy part is electrically heated and shrinks to activate the braking part to rotate toward the movable position. The second shape memory alloy part After the shape memory alloy part is powered off, the second reset part contracts to activate the braking part to rotate toward the braking position. The head-mounted display device as claimed in claim 1, wherein the second shape memory alloy component and the second reset component are in a linear shape. The head-mounted display device according to claim 1, wherein the material of the second reset member is a shape memory alloy. The head-mounted display device according to claim 1, wherein the braking member has a positioning groove, the base has a protrusion, and when the braking member is in the braking position, the protrusion is located at a first position of the positioning groove. end, when the braking member is in the movable position, the bump is located at a second end of the positioning groove, a neck portion of the positioning groove is located between the first end and the second end, and the width of the neck portion is approximately Less than the width of the bump. An adjustment module for assembly into a zoom lens group of a head-mounted display device, the adjustment module includes: a base; A slide block has an actuating end, a braking end and a transmission end; A first shape memory alloy piece is connected between the base and the actuating end, and is used to actuate the slider to drive the zoom lens group to zoom from the transmission end; A first reset member, connected between the base and the actuating end, is used to maintain the slider in an original position when the first shape memory alloy member is in a power-off state; A braking component, wherein the braking component engages the braking end when in a braking position, and the braking component is separated from the braking end when in a movable position; A second shape memory alloy component is connected between the base and the braking component for actuating the braking component to move between the braking position and the movable position; and A second reset component is connected between the base and the braking component to keep the braking component in the braking position or the movable position when the second shape memory alloy component is in a power-off state. The adjustment module of claim 9, wherein the first shape memory alloy component and the first reset component are respectively connected to opposite sides of the actuating end. The adjustment module as claimed in claim 9, wherein the transmission end is in the shape of a rack. The adjustment module of claim 9 further includes a position sensor assembled to the base for sensing the position of the slider. The adjustment module of claim 9, wherein the braking component has a pivot end, a first protrusion and a second protrusion, and the second shape memory alloy component is connected to the base and the first protrusion. Between the blocks, the second reset member is connected between the base and the second protrusion. The second shape memory alloy member shrinks after being heated by electricity to activate the braking member to rotate toward the movable position. The second shape memory alloy member After the alloy part is powered off, the second reset part contracts to activate the braking part to rotate toward the braking position. The adjustment module as claimed in claim 9, wherein the second shape memory alloy part and the second reset part are linear. The adjustment module as claimed in claim 9, wherein the material of the second reset member is shape memory alloy. The adjustment module as claimed in claim 9, wherein the braking member has a positioning groove, the base has a protrusion, and when the braking member is in the braking position, the protrusion is located at a first end of the positioning groove, When the braking member is in the movable position, the protrusion is located at a second end of the positioning groove, and a neck portion of the positioning groove is located between the first end and the second end. The width of the neck portion is slightly smaller than the The width of the bump.

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