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 connected with the bearing part; at least part of the connecting part and the bearing part are not on the same plane; the driving device further comprises a driving assembly which is in transmission connection with the bearing part and used for driving the bearing part to drive the optical element to move in the preset first direction and / or the preset 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] Some projectors on the market incorporate a drive mechanism to vibrate optical elements in pursuit of high resolution and high definition. As light passes through the vibrating optical elements, its exit angle changes, splitting the original image into multiple sub-frames. For example, when the optical element oscillates along an axis, two sub-frames are formed. These multiple sub-frames are then superimposed by other modules in the projector to create a new image identical to the original. Because the new image is composed of multiple sub-frames, its pixel count is many times higher than the original image, resulting in a significantly improved resolution.

[0003] Related technologies often suffer from problems such as complex driving systems, slow response speeds, and large structural footprints, which limit their application in miniaturized, high-efficiency projection devices. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a driving device that can realize rapid adjustment of the polarization angle of light.

[0005] This utility model provides a driving device for driving the vibration of an optical element, including a base and a carrier member disposed on the base. The carrier member includes a support portion for supporting the optical element and a connecting portion that is elastically connected to the support portion. At least a portion of the connecting portion and the support portion are not on the same plane. The driving device further includes a driving assembly, which is convexly connected to the carrier member and is used to drive the carrier member to move the optical element along a preset first direction and / or a second direction. The first direction is perpendicular to the second direction.

[0006] In one embodiment, the driving assembly includes a first driving coil and a second driving coil disposed on the substrate, and a first driving magnetic element and a second driving magnetic element disposed on the support portion. The first driving coil is disposed on the substrate along the first direction, and the second driving coil is disposed on the substrate along the second direction.

[0007] 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.

[0008] In one embodiment, the connecting portion includes a fixed portion, a movable portion, and a first connecting rib for connecting the fixed portion and the movable portion. The driving device further includes a second connecting rib for connecting the movable portion and the bearing portion. At least a portion of the first connecting rib and the second connecting rib extends along a predetermined third direction.

[0009] In one embodiment, the movable part includes a first bend, a second bend, a third bend, and a fourth bend that are elastically arranged sequentially along the bearing part, and the first bend, the second bend, the third bend, and the fourth bend are connected to each other.

[0010] In one embodiment, the first bent portion and the third bent portion are respectively connected to the fixing portion via the first connecting rib, and the second bent portion and the fourth bent portion are respectively connected to the bearing portion via the second connecting rib.

[0011] In one embodiment, the movable part further includes a third connecting rib disposed between the first bent part, the second bent part, the third bent part and the fourth bent part, wherein both ends of the first bent part, the second bent part, the third bent part and the fourth bent part extend along the third direction and are connected to each other by the third connecting rib.

[0012] 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.

[0013] In one embodiment, the first driving magnetic element and the second driving magnetic element are bonded to one end of the support portion near the substrate.

[0014] This utility model also provides a projection device, including a driving device as described in the above embodiments.

[0015] This invention provides a driving device that employs a different structure for its support and connecting parts compared to existing designs. This allows for more flexible and rapid adjustment of the optical element's position, enabling quick adjustment of the light polarization angle. It not only simplifies the driving mechanism but also significantly improves the system's response speed and accuracy. This results in a driving device that, while increasing resolution, offers higher operational efficiency and a more compact structural design, meeting the demands of modern projectors for high resolution, high definition, and a compact design. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a schematic diagram of a driving device provided in a preferred embodiment of the present invention.

[0018] Figure 2 An exploded view of a driving device provided in a preferred embodiment of this utility model.

[0019] Figure 3 This is a structural schematic diagram of the carrier provided in a preferred embodiment of the present invention.

[0020] Figure label:

[0021] 1. Substrate; 2. Supporting component; 3. Driving assembly; 4. Circuit board; 5. Optical element; 11. Second clearance through hole; 21. Supporting part; 22. Connecting part; 23. First clearance through hole; 31. First driving magnetic component; 32. Second driving magnetic component; 33. First driving coil; 34. Second driving coil; 221. Fixing part; 222. First bending part; 223. Second bending part; 224. Third bending part; 225. Fourth bending part; 226. First connecting rib; 227. Second connecting rib; 228. Third connecting rib. Detailed Implementation

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] This driving device, used to drive the vibration of an optical element, includes a base 1, a carrier 2, and a driving assembly 3. The carrier 2 includes a connecting portion 22 and a supporting portion 21 connected to the base 1, and the optical element 5 is disposed on the supporting portion 21. The connecting portion 22 is formed by bending the two sides of the supporting portion 21 at 90°, and it is elastic, capable of deformation under external force, thereby allowing the supporting portion 21 to drive the optical element 5 to move within a certain range. The driving assembly 3 is connected to the carrier 2 and is used to drive the carrier 2 to move the optical element 5 along a first direction X and / or a second direction Y. In this embodiment, the driving assembly 3 can generate driving force through electromagnetic, piezoelectric, or other means, thereby pushing the carrier 2 to move, realizing the adjustment of the position of the optical element 5, and thus achieving the adjustment or switching of the polarization effect.

[0030] Optionally, the driving assembly 3 includes a first driving coil 33 and a second driving coil 34 disposed on the base 1, and a first driving magnetic element 31 and a second driving magnetic element 32 disposed on the support portion 21. The first driving coil 33 is disposed on the base 1 along a first direction, and the second driving coil 34 is disposed on the base 1 along a second direction. Both can exert forces on the first driving magnetic element 31 and the second driving magnetic element 32 respectively, thereby causing the first driving magnetic element 31 and the second driving magnetic element 32 to drive the support portion 2 and the optical element 5 to move along the first direction X and / or the second direction Y.

[0031] 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.

[0032] Specifically, the first driving coil 33 and the first driving magnetic component 31 are stacked along a direction perpendicular to the first direction X and / or the second direction Y, and the second driving coil 34 and the second driving magnetic component 32 are stacked along a direction perpendicular to the first direction X and / or the second direction Y. By stacking the coils and magnetic components along corresponding directions, bidirectional driving functionality can be effectively achieved within a limited structural space. On the one hand, the stacked arrangement can improve the efficiency of the magnetic field, enhance the driving response speed and control accuracy; on the other hand, the more compact structural arrangement helps to reduce the overall size of the driving device and meet the installation requirements of miniaturized equipment.

[0033] In this embodiment, the first driving magnetic component 31 and the second driving magnetic component 32 are bonded to one end of the support portion 21 near the substrate 1. Fixing the magnetic components to the support portion 21 by bonding not only simplifies the assembly process and improves processing efficiency, but also avoids structural interference or additional weight that may be introduced by traditional mechanical fixing methods.

[0034] Optionally, the first driving magnetic component 31 and the second driving magnetic component 32 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.

[0035] In this embodiment, the driving device further includes a circuit board 4 disposed on the base 1. The circuit board 4 is electrically connected to the first driving coil 33 and the second driving coil 34. The circuit board 4 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 movement direction and amplitude of the optical element 5. Optionally, the circuit board 4 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.

[0036] When current is supplied to the first drive coil 33 by the circuit board 4, the electromagnetic interaction with the first drive magnetic element 31 generates a driving force in the second direction Y according to the left-hand rule. This drives the carrier portion 21, which is equipped with the first magnetic element, to move the optical element 5 in the second direction Y. Similarly, when current is supplied to the second drive coil 34 by the circuit board 4, the electromagnetic interaction with the second drive magnetic element 32 generates a driving force in the first direction X. This drives the carrier portion 21, which is equipped with the second drive magnetic element 32, to move in the first direction X, thereby achieving a bidirectional driving function.

[0037] In this embodiment, the connecting part 22 includes a fixed part 221, a movable part, and a first connecting rib 226 for connecting the fixed part 221 and the movable part. The driving device also includes a second connecting rib 227 for connecting the movable part and the bearing part 21. At least a portion of the first connecting rib 226 and the second connecting rib 227 extends in the third direction Y. The fixed part 221 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, improving the maintainability and modularity of the driving device.

[0038] like Figure 3 As shown, in this embodiment, the movable part includes a first bent part 222, a second bent part 223, a third bent part 224, and a fourth bent part 225 that are elastically arranged sequentially along the supporting part 21. The first bent part 222, the second bent part 223, the third bent part 224, and the fourth bent part 225 are connected to each other to form a continuous waveform or curve structure. The first bent part 222 and the third bent part 224 are respectively connected to the fixed part 221 by a first connecting rib 226, and the second bent part 223 and the fourth bent part 225 are respectively connected to the supporting part 21 by a second connecting rib 227.

[0039] Optionally, the movable part further includes a third connecting rib 228 disposed between the first bend 222, the second bend 223, the third bend 224 and the fourth bend 225, wherein both ends of the first bend 222, the second bend 223, the third bend 224 and the fourth bend 225 extend in the third direction Z and are connected to each other by the third connecting rib 228.

[0040] This connection method allows the fixed part 221 and the supporting part 21 to form a flexible connection structure through multiple bends. Under the action of the driving component 3, it can achieve elastic deformation along a predetermined direction, thereby driving the supporting part 21 and the optical element 5 on it to move. The multi-segment bend design not only improves the flexibility of the structure, but also enhances the system's guidance and anti-interference capabilities, ensuring the stability of the driving device in dynamic working conditions. In addition, this connection form also has good buffering and shock absorption effects, making it suitable for fine-tuning and response control requirements in various application scenarios.

[0041] Optionally, the first bend 222, the second bend 223, the third bend 224 and the fourth bend 225 are all made of elastic materials, such as metal springs, engineering plastics or other materials with good elasticity and deformation recovery.

[0042] In this embodiment, the carrier 2 has a first clearance through hole 23, and the substrate 1 has a second clearance through hole 11 at a corresponding position that matches the first clearance through hole 23. The first clearance through hole 23 and the second clearance through hole 11 are provided to provide clearance space for the working optical path of the optical element 5, 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.

[0043] A second aspect of this application provides a projection device, including a driving device according to the above embodiments.

[0044] 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.

[0045] 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 The device includes a substrate (1) and a support member (2) disposed on the substrate (1). The support member (2) includes a support portion (21) for supporting the optical element (5) and a flexible connecting portion (22) connecting the support portion (21). At least a portion of the connecting portion (22) and the support portion (21) are not on the same plane. The driving device further includes a driving component (3), which is connected to the carrier (2) for driving the carrier (2) to move the optical element (5) along a preset first direction and / or second direction; wherein the first direction is different from the second direction.

2. The drive apparatus according to claim 1, wherein The driving assembly (3) includes a first driving coil (33) and a second driving coil (34) disposed on the substrate (1), and a first driving magnetic element (31) and a second driving magnetic element (32) disposed on the support portion (21). The first driving coil (33) is disposed on the substrate (1) along the first direction, and the second driving coil (34) is disposed on the substrate (1) along the second direction.

3. The drive apparatus according to claim 2, wherein The driving device further includes a circuit board (4) disposed on the substrate (1), the circuit board (4) being electrically connected to the first driving coil (33) and the second driving coil (34).

4. The drive apparatus according to claim 1, wherein The connecting part (22) includes a fixed part (221), a movable part, and a first connecting rib (226) for connecting the fixed part (221) and the movable part. The driving device also includes a second connecting rib (227) for connecting the movable part and the bearing part (21). At least a portion of the first connecting rib (226) and the second connecting rib (227) extend along a predetermined third direction.

5. The drive apparatus according to claim 4, wherein The movable part includes a first bend (222), a second bend (223), a third bend (224) and a fourth bend (225) that are elastically arranged sequentially along the bearing part (21), and the first bend (222), the second bend (223), the third bend (224) and the fourth bend (225) are connected to each other.

6. The drive apparatus according to claim 5, wherein The first bent portion (222) and the third bent portion (224) are respectively connected to the fixed portion (221) through the first connecting rib (226), and the second bent portion (223) and the fourth bent portion (225) are respectively connected to the bearing portion (21) through the second connecting rib (227).

7. The drive apparatus according to claim 6, wherein The movable part further includes a third connecting rib (228) disposed between the first bending part (222), the second bending part (223), the third bending part (224) and the fourth bending part (225), wherein both ends of the first bending part (222), the second bending part (223), the third bending part (224) and the fourth bending part (225) extend along the third direction and are connected to each other by the third connecting rib (228).

8. The drive apparatus according to claim 1, wherein The support member (2) has a first clearance through hole (23), and the base (1) has a second clearance through hole (11) that matches the first clearance through hole.

9. The drive apparatus according to claim 2, wherein The first driving magnetic component (31) and the second driving magnetic component (32) are bonded to one end of the bearing portion (21) near the base (1).

10. A projection apparatus, characterized by, Includes a drive device as described in any one of claims 1-9.

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