Driving device and projection equipment

Abstract

The utility model discloses a driving device which is used for driving an optical element to vibrate and comprises a base body and a bearing part arranged on the base body, and the bearing part comprises a bearing part used for bearing the optical element and an elastic connecting part used for connecting the bearing part and the base body; the driving device further comprises a driving assembly, and the driving assembly comprises at least two first driving parts used for driving the bearing part to move in the preset first direction and at least two second driving parts used for driving the bearing part to move in the preset second direction. The at least two first driving parts and the at least two second driving parts are arranged around the bearing part to form a multilateral driving structure; wherein the first direction is different from the second direction. The utility model further discloses projection equipment comprising the driving device.

Description

Technical Field

[0001] This utility model relates to a driving device, and more particularly to a driving device and a projection device. Background Technology

[0002] With the widespread use of projection equipment in scenarios such as conferences, education, and home entertainment, users' demands for image resolution and display clarity are increasing. To achieve high-resolution displays, some projection devices have introduced polarization technology. By controlling the polarization state of light through the vibration of optical elements driven by a driving device, the original image can be divided into multiple sub-frames during the image projection process, and then synthesized with high precision through an optical processing module, thereby significantly improving the clarity and detail of the output image.

[0003] In practical applications, optical elements typically operate by oscillation or vibration. Light passing through these elements, whose polarization directions constantly change, is separated into multiple sub-frame images with different polarization directions. For example, if an optical element oscillates back and forth along one axis, the resulting image can form two sub-frame images. These multiple sub-frame images are then superimposed by subsequent modules in a projection system to obtain the final image. Because the superimposed image expands in the pixel dimension, the overall resolution is also improved.

[0004] In related technologies, the driving source of the driving device is often located on two adjacent sides of the substrate, which can only provide a unidirectional driving function. The asymmetrical driving structure leads to uneven force on the driving device during operation, which can easily cause problems such as motion trajectory deviation and vibration instability, thereby affecting the accuracy matching of image subframes and the image superposition effect. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a driving device that can achieve rapid and stable adjustment of the polarization angle of light.

[0006] This utility model provides a driving device for driving the vibration of an optical element, including a base and a support member disposed on the base. The support member includes a support portion for supporting the optical element and a connecting portion that is elastic and connects the support portion and the base.

[0007] The driving device further includes a driving component, which includes at least two first driving parts for driving the carrier to move along a preset first direction and at least two second driving parts for driving the carrier to move along a preset second direction. The at least two first driving parts and the at least two second driving parts are arranged around the carrier to form a polygonal driving structure; wherein the first direction and the second direction are different.

[0008] In one embodiment, the supporting portion includes a supporting body, a supporting outer frame, and a first fixing portion for connecting the supporting body and the supporting outer frame. The connecting portion includes a second fixing portion connected to the base and a movable portion for connecting the second fixing portion and the supporting outer frame. At least a portion of the movable portion extends along a predetermined third direction; wherein the third direction is perpendicular to the first direction and the second direction.

[0009] In one embodiment, the two ends of the supporting outer frame are bent at an angle along a preset third direction to form a first mounting portion, and the two ends of the supporting body are bent at an angle along a preset third direction to form a second mounting portion. The first mounting portion is perpendicular to the second mounting portion, and the third direction is perpendicular to the first direction and the second direction.

[0010] In one embodiment, the first driving part includes a first driving coil and a first driving magnetic element, the second driving part includes a second driving coil and a second driving magnetic element, the first driving magnetic element is mounted on the first mounting part, the second driving magnetic element is mounted on the second mounting part, and the first driving coil and the second driving coil are mounted on the substrate.

[0011] In one embodiment, the first driving coil and the first driving magnetic element are stacked along the first direction, and the second driving coil and the second driving magnetic element are stacked along the second direction.

[0012] In one embodiment, the driving device further includes a circuit board disposed on the substrate, the circuit board being electrically connected to the first driving coil and the second driving coil.

[0013] In one embodiment, the carrier has a first clearance through hole, and the substrate has a second clearance through hole that matches the first clearance through hole.

[0014] In one embodiment, the supporting portion and the connecting portion are integrally formed.

[0015] This utility model also provides a projection device, including a driving device as described in the above embodiments.

[0016] The present invention provides a driving device that forms a polygonal driving structure by arranging multiple first driving parts and multiple second driving parts around the support part of the driving device. Compared with the common single-sided or localized driving components in the prior art, the polygonal driving structure forms a relatively symmetrical driving layout around the support part, so that the optical element can obtain a balanced driving force in different directions. This effectively avoids the problem of uneven force and vibration offset caused by single-sided driving, and improves the stability and accuracy of the overall motion. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a driving device provided in a preferred embodiment of the present invention.

[0019] Figure 2 An exploded view of a driving device provided in a preferred embodiment of this utility model.

[0020] Figure 3 This is a structural schematic diagram of the carrier provided in a preferred embodiment of the present invention.

[0021] Figure label:

[0022] 1. Base; 2. Supporting component; 3. Driving assembly; 11. Second clearance through hole; 21. First clearance through hole; 22. Supporting part; 23. Connecting part; 31. First driving part; 32. Second driving part; 221. Supporting outer frame; 222. Supporting main body; 223. Second mounting part; 224. First mounting part; 231. Second fixing part; 232. Movable part; 311. First driving coil; 312. First driving magnetic component; 321. Second driving coil; 322. Second driving magnetic component. Detailed Implementation

[0023] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0025] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0027] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0028] Please refer to Figures 1 to 2 The first aspect of this application provides a driving device that can be used in projection equipment such as projectors.

[0029] It is understood that, for ease of description, the driving device is defined in the following text as having a first direction X, a second direction Y, and a third direction Z, which are different from each other. For example, the first direction X can be the length direction of the driving device, the second direction Y can be the width direction of the driving device, and the third direction Z can be the height direction of the driving device. The first direction X is perpendicular to the second direction Y, and the second direction Y is perpendicular to the third direction Z. In other embodiments, the coordinate system of the driving device can be flexibly set according to specific actual needs.

[0030] The driving device includes a base 1, a support member 2 mounted on the base 1, optical elements mounted on the support member 2, and a driving assembly 3 for driving the movement of the support member 2. The support member 2 includes a support portion 22 and a connecting portion 23. The support portion 22 directly supports the optical elements. The connecting portion 23 is located on both sides of the support portion 22 and is formed by bending the edges of the support portion 22 at a certain angle, providing good elasticity and allowing the support portion 22 to deflect or displace relative to the base 1 in a controllable manner when driven. The connecting portion 23 not only provides support but also has guiding and buffering functions, ensuring the stability and repeatability of the support portion 22 during movement. In this embodiment, the bending angle is 90°.

[0031] The driving assembly 3 includes at least two first driving parts 31 and at least two second driving parts 32. The first driving parts 31 drive the carrier part 22 to move along a first direction X, and the second driving parts 32 drive the carrier part 22 to move along a second direction Y. Multiple first driving parts 31 and second driving parts 32 are arranged around the carrier part 22 to form a polygonal driving structure, thereby achieving precise control of the carrier part 22 in the XY plane. Optionally, the multiple first driving parts 31 and the multiple second driving parts 32 are arranged symmetrically. Compared with the common single-sided or localized driving assembly 3 in the prior art, this polygonal driving structure forms a symmetrical driving layout around the carrier part 22, enabling the optical element to obtain balanced driving force in different directions. This effectively avoids the uneven force and vibration offset problems caused by single-sided driving, improving the stability and accuracy of the overall motion.

[0032] like Figure 3 As shown, in this embodiment, the supporting part 22 includes a supporting body 222, a supporting outer frame 221, and a first fixing part for connecting the supporting body 222 and the supporting outer frame 221. The connecting part 23 includes a second fixing part 231 connected to the base 1, and a movable part 232 for connecting the second fixing part 231 and the supporting outer frame 221. At least a portion of the movable part 232 extends in the third direction Z. There is a gap between the supporting outer frame 221 and the supporting body 222, which can absorb some of the impact and displacement error during the driving process, thereby improving the shock resistance and motion accuracy.

[0033] In this embodiment, the second fixing part 231 is detachably installed on the base 1. The second fixing part 231 can be connected to the base 1 by screws, clips, or other mechanical connection structures, which facilitates disassembly and assembly during installation, maintenance, or replacement, thereby improving the maintainability and modularity of the drive device.

[0034] Optionally, the two ends of the supporting outer frame 221 are bent at a certain angle along the third direction Z to form a first mounting portion 224, and the two ends of the supporting body 222 are also bent at a certain angle along the third direction Z to form a second mounting portion 223. The first mounting portion 224 and the second mounting portion 223 are arranged perpendicular to each other. In this embodiment, the bending angle is 90°, so that the first mounting portion 224 is perpendicular to the plane where the supporting outer frame 221 is located, and the second mounting portion 223 is perpendicular to the plane where the supporting body 222 is located.

[0035] Optionally, the first driving unit 31 includes a first driving coil 311 and a first driving magnetic element 312, and the second driving unit 32 includes a second driving coil 321 and a second driving magnetic element 322. The first driving coil 311 and the second driving coil 321 are respectively fixed on the base 1 and correspond to the positions of their respective magnetic elements. The first driving magnetic element 312 is installed on the first mounting part 224, and the second driving magnetic element 322 is installed on the second mounting part 223, so that the supporting frame 221 and the supporting body 222 can respectively bear the driving load in different directions, improving the stability of the overall structure. Furthermore, since the first driving magnetic element 312 and the second driving magnetic element 322 are respectively matched with driving magnetic fields in different directions, interference or sway caused by the same structural component bearing multiple directions of driving at the same time is avoided, making the driving response more sensitive and the image processing more accurate, which is beneficial to improving the image quality after multi-frame superposition.

[0036] It is understandable that the mounting positions of the first driving coil 311 and the first driving magnetic component 312 can be interchanged, and the mounting positions of the second driving coil 321 and the second driving magnetic component 322 can also be interchanged, as long as driving force can be generated.

[0037] Specifically, the first driving coil 311 and the first driving magnetic component 312 are stacked along the first direction, and the second driving coil 321 and the second driving magnetic component 322 are stacked along the second direction. When the coils are energized, the magnetic field generated by the coils interacts with the corresponding magnetic components, forming an attractive or repulsive force, thereby pushing the carrier 2 to move along the corresponding direction. For example, when the first driving coil 311 is energized, the magnetic field it generates attracts or repels the first driving magnetic component 312, driving the carrier 2 to produce linear motion or slight oscillation along the first direction X; similarly, when the second driving coil 321 is energized, it drives the carrier 2 to move along the second direction Y. Since the first direction X and the second direction Y are perpendicular to each other, the superposition of the two sets of driving structures enables the carrier 2 to move in the XY plane, thereby realizing rapid response and precise adjustment of the optical components in multiple directions. In addition, the stacked arrangement can reduce the space occupied by the overall module, which is conducive to the compact and miniaturized integrated design, and further improves the application adaptability of the driving device in various projection devices.

[0038] Optionally, the first driving magnetic component 312 and the second driving magnetic component 322 can be made of high-performance permanent magnet materials, such as neodymium iron boron, to ensure that they still have sufficient magnetic response capability in the miniaturized structure.

[0039] In this embodiment, the driving device further includes a circuit board disposed on the base 1. The circuit board is electrically connected to the first driving coil 311 and the second driving coil 321. The circuit board is used to provide current control signals to the driving coils, thereby controlling their energizing state, energizing direction, and current magnitude, to achieve precise control of the direction and amplitude of motion of the optical element. Optionally, the circuit board may be provided with components such as a driving chip, a power management module, and a signal processing circuit, for receiving instructions from an external control system and converting them into electrical signals suitable for the driving coils.

[0040] In this embodiment, the carrier 2 has a first clearance through hole 21, and the substrate 1 has a second clearance through hole 11 at a corresponding position that matches the first clearance through hole 21. The first clearance through hole 21 and the second clearance through hole 11 are provided to provide clearance space for the working optical path of the optical element, so as to avoid the carrier 2 or the substrate 1 structure from blocking the optical path, thereby ensuring that the light can pass through smoothly during the operation of the driving device and ensuring that the optical performance is not affected.

[0041] A second aspect of this application provides a projection device, including a driving device according to the above embodiments.

[0042] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0043] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A driving device for driving an optical element (5) to vibrate, characterized in that It includes a substrate (1) and a support member (2) disposed on the substrate (1). The support member (2) includes a support portion (22) for supporting the optical element and a flexible connecting portion (23) for connecting the support portion (22) and the substrate (1). The driving device further includes a driving component (3), which includes at least two first driving parts (31) for driving the support part (22) to move along a preset first direction and at least two second driving parts (32) for driving the support part (22) to move along a preset second direction. The at least two first driving parts (31) and the at least two second driving parts (32) are arranged around the support part (22) to form a polygonal driving structure. The first direction and the second direction are different.

2. The drive apparatus according to claim 1, wherein The supporting part (22) includes a supporting body (222), a supporting outer frame (221), and a first fixing part for connecting the supporting body (222) and the supporting outer frame (221). The connecting part (23) includes a second fixing part (231) connected to the base (1) and a movable part (232) for connecting the second fixing part (231) and the supporting outer frame (221). At least a portion of the movable part (232) extends along a preset third direction; wherein the third direction is perpendicular to the first direction and the second direction.

3. The drive apparatus according to claim 2, wherein The two ends of the supporting outer frame (221) are bent at an angle along a preset third direction to form a first mounting part (224), and the two ends of the supporting body (222) are bent at an angle along a preset third direction to form a second mounting part (223). The first mounting part (224) is perpendicular to the second mounting part (223), and the third direction is perpendicular to the first direction and the second direction.

4. The drive apparatus according to claim 3, wherein The first driving part (31) includes a first driving coil (311) and a first driving magnetic element (312), and the second driving part (32) includes a second driving coil (321) and a second driving magnetic element (322). The first driving magnetic element (312) is mounted on the first mounting part (224), the second driving magnetic element (322) is mounted on the second mounting part (223), and the first driving coil (311) and the second driving coil (321) are mounted on the substrate (1).

5. The drive apparatus according to claim 4, wherein The first driving coil (311) and the first driving magnetic element (312) are stacked along the first direction, and the second driving coil (321) and the second driving magnetic element (322) are stacked along the second direction.

6. The drive apparatus according to claim 4, wherein The driving device also includes a circuit board disposed on the base (1), the circuit board being electrically connected to the first driving coil (311) and the second driving coil (321).

7. The drive apparatus according to claim 1, wherein The support member (2) has a first clearance through hole (21), and the base (1) has a second clearance through hole (11) that matches the first clearance through hole (21).

8. The drive apparatus according to claim 1, wherein The supporting part (22) and the connecting part (23) are integrally formed.

9. A projection apparatus, characterized by, A drive device comprising a drive device as claimed in any of claims 1-8. A drive device comprising a drive device as claimed in any of claims 1-8.

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