Adjusting device and projection equipment

Abstract

The invention discloses an adjusting device and projection equipment. The adjusting device is applied to the projection equipment and comprises a driving mechanism and a fixing frame, and the driving mechanism comprises an elastic piece and a piezoelectric piece which are connected with each other in the thickness direction; the fixing frame is connected with the elastic sheet, and the fixing frame is provided with a hollow structure; and the fixing frame is configured to install a dissipation sheet of the projection equipment at the hollow structure. According to the adjusting device provided by the embodiment of the invention, the driving mechanism drives the fixing frame and the dissipation sheet to generate vibration together, so that the projection visual effect of the projection equipment can be remarkably improved. Moreover, the driving mechanism adopts a mode of combining the elastic sheet and the piezoelectric sheet, so that the structure is simple, the arrangement is convenient, and the occupied space is small; besides, by adjusting the voltage value applied to the piezoelectric plate, the vibration amplitude generated by the driving mechanism can be conveniently changed, so that different projection requirements of the projection equipment are met, and the use is flexible and convenient.

Description

Technical Field

[0001] The present application relates to the technical field of electronic products, and more particularly, to an adjustment device and a projection device. Background Art

[0002] With the vigorous development of science and technology, projection technology has become increasingly mature, and the application fields of projection devices have become wider and wider. For example, it is applied to commercial fields such as conference explanations, touring exhibitions, and promotional activities; applied to educational fields such as school teaching and academic discussions; and applied to home fields such as home theaters and in-vehicle fields.

[0003] The projection visual effect is one of the core indicators for measuring the performance of a projection device, which directly affects the user's perception of image clarity, color restoration, contrast, and viewing comfort. However, current projection devices on the market, including in-vehicle projectors, still face many challenges in complex and changing actual application environments. For example, in an in-vehicle scenario, factors such as vibrations generated during vehicle driving, external light interference (such as strong sunlight and oncoming vehicle lights), and difficulties in adjusting the projection angle and distance due to limited in-vehicle space may all have an adverse impact on the projection visual effect, resulting in problems such as blurred images, color distortion, decreased contrast, and eye irritation, thereby affecting the user's viewing experience.

[0004] In view of this, a new technical solution is needed to improve the above technical problems. Summary of the Invention

[0005] An object of the present application is to provide a new technical solution for an adjustment device and a projection device.

[0006] According to a first aspect of the present application, there is provided an adjustment device, which is applied to a projection device. The adjustment device includes:

[0007] A driving mechanism, the driving mechanism includes a spring piece and a piezoelectric piece connected to each other in the thickness direction;

[0008] A fixing frame, the fixing frame is connected to the spring piece, and the fixing frame is provided with a hollow structure; the fixing frame is configured to: install a dissipation sheet of the projection device at the hollow structure.

[0009] Optionally, the fixing frame includes a first frame body and a second frame body. The first frame body is provided with a first hollow portion, the second frame body is provided with a second hollow portion, the first frame body and the second frame body are stacked, and the first hollow portion and the second hollow portion communicate with each other to form the hollow structure;

[0010] At least two driving mechanisms are provided, and the first frame body and the second frame body are each connected to at least one driving mechanism.

[0011] Optionally, the elastic sheet has a first surface and a second surface disposed opposite to each other in the thickness direction; the piezoelectric sheet is connected to the first surface and / or the second surface of the elastic sheet.

[0012] Optionally, the fixing frame is adhesively connected or welded to the elastic sheet.

[0013] Optionally, the adjusting device further includes a connecting piece, and one of the fixing frame and the elastic sheet is integrally formed with the connecting piece, and the other is adhesively connected or welded to the connecting piece.

[0014] Optionally, the fixing frame and the elastic sheet are of an integrally formed structure, and the fixing frame is bent at its edge to form the elastic sheet.

[0015] Optionally, the elastic sheet is of a flat structure.

[0016] Optionally, the elastic sheet includes a first sheet body and a second sheet body, and the first sheet body and the second sheet body are bent and connected;

[0017] One of the first sheet body and the second sheet body is connected to the piezoelectric sheet; the first sheet body and / or the second sheet body is connected to the fixing frame.

[0018] Optionally, the fixing frame is provided with a flanging portion around the hollow structure, and the flanging portion is used to abut against the dissipation sheet of the projection device.

[0019] According to a second aspect of the present application, there is provided a projection device, and the projection device includes the adjusting device as described in the first aspect.

[0020] In the adjusting device provided in the embodiment of the present application, by driving the fixing frame together with the dissipation sheet to vibrate through the driving mechanism, the projection visual effect of the projection device can be significantly improved. Moreover, the driving mechanism adopts a combination form of an elastic sheet and a piezoelectric sheet, which has a simple structure, is convenient to set, and occupies a small space; in addition, by adjusting the voltage value applied to the piezoelectric sheet, the vibration amplitude generated by the driving mechanism can be easily changed, so as to adapt to different projection requirements of the projection device, and it is flexible and convenient to use.

[0021] Other features and advantages of the present application will become clear through the following detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings. Description of the Drawings

[0022] The drawings incorporated in the specification and constituting a part of the specification illustrate the embodiments of the present application, and together with the description are used to explain the principles of the present application.

[0023] Figure 1Schematic structure of the adjustment device according to an embodiment of the present application Figure 1 ;

[0024] Figure 2 Schematic structure of the adjustment device according to an embodiment of the present application Figure 2 ;

[0025] Figure 3 Schematic diagram of the cooperation between the adjustment device and the dissipation sheet according to an embodiment of the present application Figure 1 ;

[0026] Figure 4 Schematic diagram of the cooperation between the adjustment device and the dissipation sheet according to an embodiment of the present application Figure 2 ;

[0027] Figure 5 Schematic diagram of the cooperation between the adjustment device and the dissipation sheet according to an embodiment of the present application Figure 3 。

[0028] Description of reference numerals:

[0029] 1. Adjustment device; 11. Driving mechanism; 12. Fixed frame; 121. First frame body; 122. Second frame body; 120. Hollow structure; 123. Flanging part; 111. Elastic sheet; 1111. First sheet body; 1112. Second sheet body; 1110. Slit part; 100. Mounting hole; 112. Piezoelectric sheet; 13. Connecting sheet;

[0030] 2. Dissipation sheet. Detailed implementation manners

[0031] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application.

[0032] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way serves as a limitation on the present application or its application or use.

[0033] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the specification.

[0034] In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0035] It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof will not be necessary in subsequent figures.

[0036] Referring Figures 1 to 5 as shown, according to an embodiment of the present application, an adjusting device 1 is provided. The adjusting device 1 is applied to a projection device. The adjusting device 1 includes: a driving mechanism 11 and a fixing frame 12. The driving mechanism 11 includes a spring piece 111 and a piezoelectric piece 112 connected to each other in the thickness direction.

[0037] The fixing frame 12 is connected to the spring piece 111, and the fixing frame 12 is provided with a hollow structure 120. The fixing frame 12 is configured to: install a dissipation sheet of the projection device at the hollow structure 120.

[0038] In the adjusting device 1 provided by the embodiment of the present application, the piezoelectric piece 112 is one of its core components. The piezoelectric piece 112 has two surfaces arranged opposite to each other in its thickness direction. When a voltage is applied to the piezoelectric piece 112, the piezoelectric piece 112 will generate a telescopic deformation between these two surfaces, thereby generating a vibration driving force. Specifically, when a voltage is applied to the piezoelectric piece 112, since the piezoelectric piece 112 is connected to the spring piece 111 by using a thickness-direction stacking process, when the direction of the applied voltage is the same as the polarization voltage direction of the piezoelectric piece 112, the piezoelectric piece 112 thickens in its thickness direction. At the same time, its length and width directions shorten. However, since the surface of the piezoelectric piece 112 connected to the spring piece 111 cannot follow the shortening, it bends and deforms toward the other surface of the piezoelectric piece 112. When the direction of the applied voltage is opposite to the polarization voltage direction of the piezoelectric piece 112, the piezoelectric piece 112 thins in its thickness direction. At the same time, its length and width directions elongate. However, since the surface of the piezoelectric piece 112 connected to the spring piece 111 cannot follow the elongation, it bends and deforms toward the other surface of the piezoelectric piece 112. In summary, applying an alternating voltage to the piezoelectric piece 112 can cause the driving mechanism 11 to generate a bending deformation, thereby generating vibration and displacement.

[0039] While the driving mechanism 11 generates vibration and displacement, since the elastic piece 111 is connected to the fixed frame 12, the driving mechanism 11 will drive the fixed frame 12 to generate vibration and displacement. At the same time, the fixed frame 12 drives the dissipation sheet 2 of the projection device mounted thereon to generate vibration and displacement. In the projection device, light passes through the dissipation sheet 2. When the dissipation sheet 2 vibrates at a specific frequency, the incident laser beam can be divided into multiple sub-beams. After each sub-beam is scattered, the phases are randomized, and thus a uniform light field distribution is formed by superposition in space. This dynamic scattering process makes it impossible for the human eye to distinguish the rapidly changing speckle pattern within the integration time, and finally the perceived average image has a significantly weakened speckle intensity. That is to say, by vibrating the dissipation sheet 2 at a certain frequency, the concentrated point of the laser beam is softened, thereby avoiding irritating the human eye. Among them, the dissipation sheet 2 is installed at the hollow structure 120 opened in the fixed frame 12 to ensure that light passes through.

[0040] Therefore, by driving the driving mechanism 11 to drive the fixed frame 12 together with the dissipation sheet 2 to generate vibration, the projection visual effect of the projection device can be significantly improved. Moreover, the driving mechanism 11 adopts a combination form of an elastic piece 111 and a piezoelectric sheet 112, which has a simple structure, is convenient to set, and occupies a small space. In addition, by adjusting the voltage value applied to the piezoelectric sheet 112, the vibration amplitude generated by the driving mechanism 11 can be easily changed, so as to adapt to different projection requirements of the projection device, and it is flexible and convenient to use.

[0041] Among them, the piezoelectric sheet 112 is composed of alternately stacked piezoelectric ceramic layers and electrode layers. The piezoelectric ceramic layer can select piezoelectric materials such as lead zirconate titanate PZT, barium titanate BT, potassium sodium niobate KNN, aluminum nitride AlN, etc., or materials that can generate telescopic vibration under the drive of an electrical signal such as electrostrictive materials. The thickness range of a single-layer piezoelectric ceramic layer is 10 - 2000 μm. The electrode layer is a conductive material, and conductive metal materials such as Ag, Au, Pt, Pd and their alloy materials can be selected, or conductive materials such as indium tin oxide ITO can be selected. The thickness range of the electrode layer is 0.1 - 10 μm. The elastic piece 111 can be made of metals such as iron-nickel alloy, titanium alloy, stainless steel, etc., or elastic materials such as engineering plastics.

[0042] By increasing the length, width and thickness of the piezoelectric sheet 112, its resonant operating frequency can be reduced, and vice versa, its resonant operating frequency can be increased. The length range of the piezoelectric sheet 112 is 1 - 500 mm, the width range is 1 - 500 mm, and the thickness range is 0.1 - 500 mm.

[0043] The elastic piece 111 and the piezoelectric sheet 112 can be bonded together by, for example, an adhesive.

[0044] Refer to Figure 1 、 Figure 3As shown, in one embodiment, the fixed frame 12 includes a first frame body 121 and a second frame body 122. The first frame body 121 is provided with a first hollow portion, and the second frame body 122 is provided with a second hollow portion. The first frame body 121 and the second frame body 122 are stacked, and the first hollow portion and the second hollow portion communicate with each other to form the hollow structure 120;

[0045] At least two driving mechanisms 11 are provided, and the first frame body 121 and the second frame body 122 are each connected to at least one driving mechanism 11.

[0046] In this specific example, the first frame body 121 is at least independently connected to one driving mechanism 11, and the second frame body 122 is also at least independently connected to one driving mechanism 11; in this way, it is possible to select to control the first frame body 121 or the second frame body 122 to vibrate alone according to actual usage requirements, or to select to control the first frame body 121 and the second frame body 122 to vibrate simultaneously; thereby, it is possible to expand the frequency range and displacement range of the driving mechanism 11 driving the fixed frame 12 and then driving the dissipation sheet 2 to vibrate together, making the working range of the adjustment device 1 wider and more flexible in use, and capable of adapting to different projection requirements.

[0047] Refer to Figure 1 As shown, in one embodiment, the elastic sheet 111 has a first surface and a second surface disposed opposite to each other in the thickness direction; the piezoelectric sheet 112 is connected to the first surface and / or the second surface of the elastic sheet 111.

[0048] In this specific example, according to actual usage requirements, in one driving mechanism 11, only one piezoelectric sheet 112 may be provided, and this piezoelectric sheet 112 may be connected to any one of the surfaces of the elastic sheet 111 disposed opposite to each other in the thickness direction; or, in one driving mechanism 11, two piezoelectric sheets 112 may be provided, and the two piezoelectric sheets 112 are respectively connected to the first surface and the second surface of the elastic sheet 111 disposed opposite to each other in the thickness direction. The structure of the driving mechanism 11 and the achievable working range can be flexibly adjusted.

[0049] In one embodiment, the elastic sheet 111 has a side surface adjacent to the first surface and the second surface, and the fixed frame 12 is connected to the side surface of the elastic sheet 111.

[0050] In this specific example, the surface of the elastic sheet 111 with a larger area in the thickness direction is used to connect the piezoelectric sheet 112, and the side surface with a smaller area of the elastic sheet 111 is used to connect the fixed frame 12; thus, when the piezoelectric sheet 112 deforms, it can effectively drive the elastic sheet 111 and then drive the fixed frame 12 to vibrate, and the positions between the fixed frame 12 and the piezoelectric sheet 112 will not interfere with each other.

[0051] In one embodiment, the fixing frame 12 is adhesively connected or welded to the side surface of the elastic piece 111.

[0052] In this specific example, the fixing frame 12 and the elastic piece 111 are of a split structure, and the side surface of the fixing frame 12 and the elastic piece 111 are connected by an adhesive or by laser welding; in this way, the processing and manufacturing process of the fixing frame 12 is simpler.

[0053] In addition, in order to enhance the connection reliability between the fixing frame 12 and the elastic piece 111, a connecting piece 13 can be provided between the fixing frame 12 and the elastic piece 111. The connecting piece 13 can be located at the end of the elastic piece 111, for example. The connecting piece 13 can be integrally formed with the elastic piece 111, and the connecting piece 13 can also be integrally formed with the fixing frame 12. Moreover, in the embodiment where the connecting piece 13 is provided, a gap is provided between the side surface of the elastic piece 111 and the fixing frame 12, so as to ensure that while the connection strength between the fixing frame 12 and the elastic piece 111 is ensured, the elastic piece 111 has sufficient vibration amplitude.

[0054] Refer to Figure 4 As shown, in one embodiment, the fixing frame 12 and the elastic piece 111 are of an integrally formed structure, and the fixing frame 12 is bent at its edge to form the elastic piece 111.

[0055] In this specific example, the fixing frame 12 and the elastic piece 111 are of an integrally formed structure. While processing the fixing frame 12, its edge part is bent to form the elastic piece 111; in this way, the connection between the elastic piece 111 and the fixing frame 12 is more closely and firmly connected, and the connection part between the elastic piece 111 and the fixing frame 12 will not loosen. In addition, a slit portion 1110 can be opened at a position where the elastic piece 111 is close to the fixing frame 12, so as to ensure that the elastic piece 111 has sufficient vibration amplitude.

[0056] Refer to Figure 4 As shown, in one embodiment, the elastic piece 111 is of a straight structure.

[0057] In this specific example, the elastic piece 111 is of a straight structure. For example, the cross-section of the elastic piece 111 is approximately rectangular. By increasing the length, width and thickness of the elastic piece 111, the resonant operating frequency can be reduced, and vice versa, the resonant operating frequency can be increased. The length range of the elastic piece 111 is 1 - 1000 mm, the width range is 1 - 500 mm, and the thickness range is 0.1 - 50 mm.

[0058] Refer to Figure 3 、 Figure 5 As shown, in one embodiment, the elastic piece 111 includes a first piece body 1111 and a second piece body 1112, and the first piece body 1111 and the second piece body 1112 are bent and connected;

[0059] One of the first sheet body 1111 and the second sheet body 1112 is connected to the piezoelectric sheet 112; the first sheet body 1111 and / or the second sheet body 1112 are connected to the fixing frame 12.

[0060] In this specific example, according to actual usage requirements, the elastic sheet 111 can be set to include a first sheet body 1111 and a second sheet body 1112; for example, the first sheet body 1111 is connected to the piezoelectric sheet 112, and the second sheet body 1112 is connected to the fixing frame 12; or, the second sheet body 1112 is connected to the piezoelectric sheet 112, and the first sheet body 1111 is connected to the fixing frame 12; or, the first sheet body 1111 is connected to both the piezoelectric sheet 112 and the fixing frame 12 at the same time; or, the second sheet body 1112 is connected to both the piezoelectric sheet 112 and the fixing frame 12 at the same time; or, one of the first sheet body 1111 and the second sheet body 1112 is connected to the piezoelectric sheet 112, and both the first sheet body 1111 and the second sheet body 1112 are connected to the fixing frame 12.

[0061] Wherein, the lengths of the first sheet body 1111 and the second sheet body 1112 are each in the range of 1 to 1000 mm, the widths are in the range of 1 to 500 mm, and the thicknesses are in the range of 0.1 to 50 mm.

[0062] Different structures and different sizes of the elastic sheet 111 can achieve different working ranges. Mounting holes 100 can be formed in the elastic sheet 111 to facilitate connection with an external structure.

[0063] In one embodiment, the fixing frame 12 can be made of a metal material such as iron-nickel alloy, titanium alloy, stainless steel, etc., or can also be made of an elastic material such as engineering plastic. By increasing the length, width and thickness of the fixing frame 12, the resonant working frequency can be reduced, and vice versa, the resonant working frequency can be increased. The length range of the fixing frame 12 is 1 to 1000 mm, the width range is 1 to 1000 mm, and the thickness range is 0.1 to 50 mm.

[0064] Refer to Figures 1 to 2 As shown, in one embodiment, the fixing frame 12 is provided with a flanging portion 123 around the hollow structure 120, and the flanging portion 123 is used to abut against the dissipation sheet of the projection device.

[0065] In this specific example, the flanging portion 123 provided by the fixing frame 12 around the hollow structure 120 abuts against the dissipation sheet 2 of the projection device, so as to effectively limit the dissipation sheet 2 and prevent unnecessary relative movement between the dissipation sheet 2 and the fixing frame 12.

[0066] The flanging portion 123 abuts against the side surface of the dissipation sheet 2. Among them, the flanging portion 123 may be an integral structure arranged around the hollow structure 120; or it may be a discrete structure. For example, four flanging portions 123 are evenly arranged around the hollow structure 120 to respectively abut against the four side surfaces of the dissipation sheet 2.

[0067] According to another embodiment of the present application, a projection device is provided. The projection device includes the adjusting device 1 as described above, and further includes a dissipation sheet 2. The dissipation sheet 2 is installed at the hollow structure 120 opened in the fixed frame 12 of the adjusting device 1, and the dissipation sheet 2 abuts against the flanging portion 123 of the fixed frame 12. This projection device may be, for example, a vehicle-mounted projector.

[0068] In the above embodiments, the differences between the various embodiments are mainly described. As long as the different optimized features between the various embodiments are not contradictory, they can be combined to form a more optimal embodiment. Considering the simplicity of the text, it will not be elaborated here.

[0069] Although some specific embodiments of the present application have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. An adjusting device, characterized in that, The adjustment device is applied to a projection device, and the adjustment device includes: a driving mechanism (11), the driving mechanism (11) including a shrapnel (111) and a piezoelectric sheet (112) connected to each other in the thickness direction; a fixing frame (12), the fixing frame (12) being connected to the shrapnel (111), and the fixing frame (12) being provided with a hollow structure (120); the fixing frame (12) is configured to: install a dissipation sheet of the projection device at the hollow structure (120).

2. The adjusting device according to claim 1, characterized in that, The fixing frame (12) includes a first frame body (121) and a second frame body (122), the first frame body (121) is provided with a first hollow portion, the second frame body (122) is provided with a second hollow portion, the first frame body (121) and the second frame body (122) are stacked, and the first hollow portion and the second hollow portion communicate with each other to form the hollow structure (120); At least two driving mechanisms (11) are provided, and the first frame body (121) and the second frame body (122) are each connected to at least one driving mechanism (11).

3. The adjusting device according to claim 1 or 2, characterized in that, The shrapnel (111) has a first surface and a second surface arranged opposite to each other in the thickness direction; the piezoelectric sheet (112) is connected to the first surface and / or the second surface of the shrapnel (111).

4. The adjusting device according to claim 1, characterized in that The fixing frame (12) is adhesively connected or welded to the shrapnel (111).

5. The adjusting device according to claim 4, characterized in that The adjustment device further includes a connecting piece (13), and one of the fixing frame (12) and the shrapnel (111) is integrally formed with the connecting piece (13), and the other is adhesively connected or welded to the connecting piece (13).

6. The adjusting device according to claim 1, characterized in that The fixing frame (12) and the shrapnel (111) are of an integrally formed structure, and the fixing frame (12) is bent at its edge to form the shrapnel (111).

7. The adjusting device according to claim 1, characterized in that, The shrapnel (111) is of a straight structure.

8. The adjusting device according to claim 1, characterized in that The shrapnel (111) includes a first sheet body (1111) and a second sheet body (1112), and the first sheet body (1111) and the second sheet body (1112) are bent and connected; One of the first sheet body (1111) and the second sheet body (1112) is connected to the piezoelectric sheet (112); the first sheet body (1111) and / or the second sheet body (1112) are connected to the fixing frame (12).

9. The adjusting device according to claim 8, characterized in that, The fixing frame (12) is provided with a flanging portion (123) around the hollow structure (120), and the flanging portion (123) is used to abut against the dissipation sheet of the projection device.

10. A projection device, characterized in that, The projection device includes the adjustment device (1) according to any one of claims 1-9.

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