Pixel extension device

Abstract

A pixel extension device (10), comprising: a stator (100), wherein a light through hole (111) is formed in the stator (100); an elastic mechanism (200), which is connected to the stator (100), wherein the elastic mechanism (200) comprises a plurality of elastic members (201) arranged at intervals in the circumferential direction of the stator (100), the plurality of elastic members (201) are arranged around the light through hole (111), each elastic member (201) comprises a fixing unit (210), a connecting unit (220), and a cantilever unit (230), the fixing unit (210) is fixedly connected to the stator (100) and is spaced apart from the cantilever unit (230), and the connecting unit (220) is connected between the fixing unit (210) and the cantilever unit (230); and light-transmissive pieces (300), which are arranged on the cantilever units (230), wherein the light-transmissive pieces (300) can shake along with the cantilever units (230).

Description

Pixel expansion device Technical Field

[0001] The present application relates to the field of optical projection technology, and in particular to a pixel expansion device. Background Art

[0002] With the development of projection technology, projectors have found widespread use in home and office applications. Projectors use pixel expansion devices to project light onto an object, increasing the resolution of the light emitted by the projector. However, traditional pixel expansion devices often suffer from high manufacturing costs. Summary of the Invention

[0003] A technical problem solved by the present application is how to reduce the manufacturing cost of the pixel expansion device.

[0004] A pixel expansion device, comprising:

[0005] The stator is provided with a light-through hole;

[0006] an elastic mechanism connected to the stator, the elastic mechanism comprising a plurality of elastic members spaced apart along the circumference of the stator, the plurality of elastic members being arranged around the light-through hole, the elastic member comprising a fixing unit, a connecting unit, and a cantilever unit, the fixing unit being fixedly connected to the stator and spaced apart from the cantilever unit, the connecting unit being connected between the fixing unit and the cantilever unit; and

[0007] The light-transmitting sheet is arranged on the cantilever unit, and the light-transmitting sheet can vibrate along with the cantilever unit.

[0008] The details of one or more embodiments of the invention are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the invention will become apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to better describe and illustrate the embodiments and / or examples of the inventions disclosed herein, reference may be made to one or more of the accompanying drawings. The additional details or examples used to describe the accompanying drawings should not be considered to limit the scope of the disclosed inventions, the presently described embodiments and / or examples, and any of the best modes currently understood for these inventions.

[0010] FIG1 is a schematic diagram of the three-dimensional structure of a pixel expansion device provided by an embodiment.

[0011] FIG. 2 is a schematic diagram of a first exemplary exploded structure of the pixel expansion device shown in FIG. 1 .

[0012] FIG. 3 is a schematic diagram of a second example exploded structure of the pixel expansion device shown in FIG. 1 .

[0013] FIG4 is a schematic planar cross-sectional view of the pixel expansion device shown in FIG1 after the positioning member is removed.

[0014] FIG5 is a front view schematic diagram of the structure of the positioning member in the pixel expansion device shown in FIG1 .

[0015] FIG. 6 is a schematic diagram of the three-dimensional structure of the positioning member in the pixel expansion device shown in FIG. 1 .

[0016] FIG. 7 is a schematic top view of the elastic mechanism in the pixel expansion device shown in FIG. 1 .

[0017] FIG8 is a schematic top view of the elastic mechanism in a pixel expansion device according to another embodiment. DETAILED DESCRIPTION

[0018] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0019] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0020] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0021] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0022] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0023] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0024] 1 , 2 , and 3 , a pixel expansion device 10 provided in one embodiment of the present application includes a stator 100 , an elastic mechanism 200 , a light-transmitting sheet 300 , and a magnetic member 400 . The elastic mechanism 200 is connected to the stator 100 , and both the light-transmitting sheet 300 and the magnetic member 400 are disposed on the elastic mechanism 200 .

[0025] Referring to Figures 2, 3, and 4, in some embodiments, the stator 100 includes a substrate 110 and a coil 120. The substrate 110 is connected to the elastic mechanism 200. The substrate 110 can be a generally rectangular plate, with a light hole 111 defined in the middle region thereof. The light hole 111 extends through the entire thickness of the substrate 110. The coil 120 is disposed on a surface of the substrate 110, with the surface facing the elastic mechanism 200. For example, the substrate 110 can be made of metal or plastic, and the coil 120 can be a hollow coil made of copper. The coil 120 can be directly attached to or embedded in the substrate 110. Alternatively, the substrate 110 can be a circuit board, and the coil 120 can be a circuit formed by etching. When power is supplied to the coil 120, it generates an alternating magnetic field of a certain strength. There are multiple coils 120, and the multiple coils 120 are arranged on the substrate 110 at intervals along the circumference of the substrate 110, so that the multiple coils 120 are arranged around the light hole 111. For example, the number of coils 120 can be four, and the angle between any two adjacent coils 120 along the circumference of the substrate 110 can be 90 degrees.

[0026] Referring to Figures 2, 3, 5, and 6, in some embodiments, the pixel expansion device 10 may further include a positioning member 500. The positioning member 500 is fixedly connected to the substrate 110. The elastic mechanism 200 is provided with a positioning hole 211, and the positioning member 500 cooperates with the positioning hole 211. The positioning member 500 may include a first positioning segment 510, a second positioning segment 520, and a third positioning segment 530. For example, the first positioning segment 510, the second positioning segment 520, and the third positioning segment 530 may all be cylindrical, and the first positioning segment 510, the second positioning segment 520, and the third positioning segment 530 may be coaxially arranged. The third positioning segment 530 is connected between the first positioning segment 510 and the second positioning segment 520. The third positioning segment 530 has the largest cross-sectional dimension, such that the cross-sectional dimensions of the first positioning segment 510 and the second positioning segment 520 are both smaller than the cross-sectional dimension of the third positioning segment 530. Therefore, two step surfaces are formed at both ends of the third positioning segment 530 , which are respectively referred to as a first step surface and a second step surface. The first step surface is arranged around the first positioning segment 510 , and the second step surface is arranged around the second positioning segment 520 .

[0027] 2 , 3 , 5 , and 6 , a mounting hole 112 is defined in the stator 100. The first positioning segment 510 engages with the mounting hole 112. The cross-sectional dimensions of the third positioning segment 530 are larger than the diameter of the mounting hole 112. Therefore, the third positioning segment 530 cannot enter the mounting hole 112 and is located outside the mounting hole 112. This allows the substrate 110 to abut against the first stepped surface of the third positioning segment 530. This abutment between the first stepped surface and the substrate 110 effectively limits the installation of the positioning member 500, thereby improving the installation accuracy of the positioning member 500. After the first positioning segment 510 engages with the mounting hole 112, glue can be injected into the mounting hole 112 to achieve an adhesive connection between the positioning member 500 and the substrate 110.

[0028] Referring to Figures 2, 3, 5, and 6, the second positioning segment 520 engages with the positioning hole 211 on the elastic mechanism 200. The cross-sectional dimensions of the third positioning segment 530 are larger than the diameter of the positioning hole 211. Therefore, the third positioning segment 530 cannot enter the positioning hole 211 and is located outside the positioning hole 211. This allows the substrate 110 to abut against the second stepped surface of the third positioning segment 530. The abutment of the second stepped surface with the elastic mechanism 200 effectively positions the elastic mechanism 200 during installation, thereby improving the installation accuracy of the elastic mechanism 200. Since the simple positioning member 500 can effectively ensure the installation accuracy of the elastic mechanism 200, it eliminates the need for other relatively complex auxiliary jigs, reduces the difficulty of assembling the elastic mechanism 200, and ultimately reduces the manufacturing cost of the entire pixel expansion device 10. After the second positioning segment 520 engages with the positioning hole 211, glue can be injected into the positioning hole 211 to achieve an adhesive connection between the positioning member 500 and the elastic mechanism 200. Obviously, when the pixel expansion device 10 is assembled, the third positioning segment 530 will abut between the elastic mechanism 200 and the substrate 110. Along the thickness direction of the substrate 110 (i.e., the Z-axis direction as shown in Figure 1), the elastic member 201 and the substrate 110 can be spaced apart from each other.

[0029] Referring to Figures 2, 3, 5, and 6, in some embodiments, the first positioning section 510 is provided with a first glue reservoir 511. The first glue reservoir 511 is disposed on the outer circumferential surface of the first positioning section 510. The first glue reservoir 511 is an annular groove disposed around the central axis of the first positioning section 510. The first glue reservoir 511 is formed by the outer circumferential surface of the first positioning section 510 being recessed to a certain depth along the radial direction of the first positioning section 510. When the first positioning section 510 is engaged with the mounting hole 112, the first glue reservoir 511 can be positioned within the mounting hole 112. During the process of injecting glue into the mounting hole 112, the glue can be stored in the first glue reservoir 511, thereby increasing the amount of glue stored in the mounting hole 112 and, in turn, improving the strength of the adhesive connection between the positioning member 500 and the substrate 110.

[0030] Referring to Figures 2, 3, 5, and 6, in some embodiments, the second positioning segment 520 is provided with a second glue storage groove 521. The second glue storage groove 521 is disposed on the outer circumferential surface of the second positioning segment 520. The second glue storage groove 521 is an annular groove disposed around the central axis of the second positioning segment 520. The second glue storage groove 521 is formed by the outer circumferential surface of the second positioning segment 520 being recessed to a certain depth along the radial direction of the second positioning segment 520. When the second positioning segment 520 is fully engaged with the positioning hole 211, the second glue storage groove 521 can be positioned within the positioning hole 211. During the process of injecting glue into the positioning hole 211, the glue can be stored in the second glue storage groove 521, thereby increasing the amount of glue stored in the positioning hole 211 and, in turn, improving the strength of the adhesive connection between the positioning member 500 and the elastic mechanism 200.

[0031] Referring to Figures 1 and 2 , in some embodiments, the elastic mechanism 200 includes a plurality of elastic members 201 . The plurality of elastic members 201 are spaced apart along the circumference of the stator 100 , such that the plurality of elastic members 201 collectively enclose a light-transmitting hole 202 . The light-transmitting hole 202 can be coaxially arranged with the light-transmitting hole 111 . The plurality of elastic members 201 can be independently manufactured and assembled. The elastic member 201 can be a sheet-like structure with a relatively thin thickness, ranging from 0.05 mm to 2 mm. For example, the thickness of the elastic member 201 can be 0.05 mm, 1 mm, or 2 mm. The number of elastic members 201 can be three or four, for example.

[0032] If the elastic mechanism 200 is a single sheet, the thickness of the elastic mechanism 200 is 0.05 mm to 2 mm, which is relatively thin. This can easily cause deformation during assembly of the elastic mechanism 200, which can render the entire elastic mechanism 200 useless and necessitate replacement of the elastic mechanism 200 for assembly. This increases the manufacturing cost of the pixel expansion device 10.

[0033] Regarding the pixel expansion device 10 in the above embodiment, since the elastic mechanism 200 includes multiple elastic members 201 spaced apart from each other, it can also be understood that the elastic mechanism 200 is formed from a single sheet-like structure, forming multiple sheet-like elastic members 201. Each elastic member 201 can be manufactured and assembled separately. If one elastic member 201 deforms during assembly and needs to be scrapped, the scrapping of that elastic member 201 will not affect the other elastic members 201, allowing the other elastic members 201 to function normally. Therefore, if one elastic member 201 deforms, it can be directly scrapped without scrapping the other undeformed elastic members 201. This saves material costs during the assembly process of the pixel expansion device 10, thereby reducing the manufacturing cost of the entire pixel expansion device 10.

[0034] Referring to Figures 2 and 7, in some embodiments, the elastic member 201 includes a fixing unit 210, a connecting unit 220, and a cantilever unit 230, with a positioning hole 211 defined in the fixing unit 210. The fixing unit 210 and the cantilever unit 230 are spaced apart, and the connecting unit 220 is connected between the fixing unit 210 and the cantilever unit 230, such that the cantilever unit 230 can vibrate relative to the fixing unit 210 via the connecting unit 220. The cantilever unit 230 may include a first cantilever portion 231 and a second cantilever portion 232, which are interconnected. The first cantilever portion 231 extends along a first direction, and the second cantilever portion 232 extends along a second direction. The first direction and the second direction are arranged at an angle, for example, a 90° angle between the first and second directions. This can be understood as the first cantilever portion 231 and the second cantilever portion 232 being perpendicular to each other and connected to form an L-shape. For example, the first direction is the X-axis direction shown in FIG. 1 , and the second direction is the Y-axis direction shown in FIG. 1 .

[0035] 2 and 7 , for example, the connection unit 220 may include a first connection portion 221 and a second connection portion 222. The first connection portion 221 extends along a first direction and is connected between the fixing unit 210 and the first cantilever portion 231. In a direction perpendicular to the thickness of the substrate 110, that is, in a direction perpendicular to both the first and second directions, the first connection portion 221 is further away from the light-transmitting hole 202 than the first cantilever portion 231. A first gap 2211 is formed between the first connection portion 221 and the first cantilever portion 231. The first gap 2211 may extend a certain length along the first direction. The second connecting portion 222 extends along the second direction and is connected between the fixing unit 210 and the second cantilever portion 232. In a direction perpendicular to the thickness of the substrate 110, that is, in a direction perpendicular to both the first and second directions, the second connecting portion 222 is further away from the light-transmitting hole 202 than the second cantilever portion 232. A second gap 2221 is formed between the second connecting portion 222 and the second cantilever portion 232. The second gap 2221 can extend a certain length along the second direction. This structural form of the elastic member 201 can provide reasonable structural strength and prevent deformation of the elastic member 201 during vibration.

[0036] As another example, referring to Figure 8 , one end of the connecting unit 220 is connected to the fixing unit 210, and the other end of the connecting unit 220 is connected to the junction between the first cantilever portion 231 and the second cantilever portion 232. The extending direction of the connecting unit 220 can form the same angle with the first direction and the second direction. This structural form of the elastic member 201 can reduce material costs to a certain extent and also reduce the manufacturing difficulty of the elastic member 201, thereby reducing the manufacturing cost of the elastic mechanism 200 and the entire pixel expansion device 10.

[0037] In some embodiments, a first glue injection hole 233 is provided on each of the first cantilever portion 231 and the second cantilever portion 232 of the cantilever unit 230, and the number of the first glue injection hole 233 can be multiple. The first glue injection hole 233 penetrates the cantilever unit 230 along the thickness direction of the cantilever unit 230, so the first glue injection hole 233 is a through hole. A second glue injection hole 234 can also be provided on the first cantilever portion 231 and the second cantilever portion 232 of the cantilever unit 230, and the number of the second glue injection hole 234 can be multiple. The second glue injection hole 234 penetrates the cantilever unit 230 along the thickness direction of the cantilever unit 230, so the second glue injection hole 234 is a through hole. In the thickness direction perpendicular to the substrate 110, the second glue injection hole 234 can be farther away from the light transmission hole 202 than the first glue injection hole 233.

[0038] Referring to Figures 2, 3, and 4, in some embodiments, a light-transmitting sheet 300 can transmit light and can be made of glass. Each elastic member 201 is connected to the light-transmitting sheet 300. The light-transmitting sheet 300 can be fixedly mounted on the surface of the elastic member 201 facing the substrate 110, and the light-transmitting sheet 300 covers the light-transmitting hole 202 formed by the elastic mechanism 200. A portion of the light-transmitting sheet 300 can be accommodated within the light-transmitting hole 111 of the substrate 110, or the entire light-transmitting sheet 300 can be completely located outside the light-transmitting hole 111. When the light-transmitting sheet 300 is mounted on the elastic member 201, it blocks the first glue injection hole 233. This can be understood as the orthographic projection of the first glue injection hole 233 in the thickness direction of the cantilever unit 230 falls on the light-transmitting sheet 300, or it can be understood as the light-transmitting sheet 300 covering the first glue injection hole 233. During the installation of the light-transmitting sheet 300, glue can be first injected into the first glue injection hole 233 so that the glue pre-positions the light-transmitting sheet 300. This reduces the difficulty of positioning the light-transmitting sheet 300 using the auxiliary jig and the time required to position the light-transmitting sheet 300. This reduces the assembly cost of the light-transmitting sheet 300 while ensuring the positioning accuracy of the light-transmitting sheet 300, thereby reducing the manufacturing cost of the entire pixel expansion device 10. After the light-transmitting sheet 300 is positioned, glue can be injected into the gap between the light-transmitting sheet 300 and the elastic member 201 to achieve a bonded connection between the light-transmitting sheet 300 and the elastic member 201, thereby ensuring the strength of the bonded connection.

[0039] Referring to Figures 2, 3, and 4, in some embodiments, the magnetic member 400 can be substantially strip-shaped. The number of magnetic members 400 can be equal to the number of elastic members 201, allowing the same magnetic member 400 to be connected between two adjacent elastic members 201 circumferentially disposed along the substrate 110. The magnetic member 400 can also be fixedly disposed on the surface of the elastic member 201 facing the substrate 110, so that both the magnetic member 400 and the elastic member 201 are located on the same surface in the thickness direction of the elastic mechanism 200. In a direction perpendicular to the thickness of the substrate 110, the magnetic member 400 is further away from the light-transmitting hole 202 than the light-transmitting sheet 300. When the magnetic member 400 is disposed on the elastic member 201, it is spaced apart from the substrate 110 and blocks the second glue injection hole 234. This can be understood as the orthographic projection of the second glue injection hole 234 in the thickness direction of the cantilever unit 230 falling on the magnetic member 400, or as covering the second glue injection hole 234. During the installation of the magnetic member 400, glue can first be injected into the second glue injection hole 234 so that the glue pre-positions the installation of the magnetic member 400. This reduces the difficulty of positioning the magnetic member 400 using the auxiliary jig and reduces the positioning time of the magnetic member 400. This reduces the assembly cost of the magnetic member 400 while ensuring the positioning accuracy of the magnetic member 400, thereby reducing the manufacturing cost of the entire pixel expansion device 10. After the magnetic member 400 is positioned, glue can be injected into the gap between the magnetic member 400 and the elastic member 201 to achieve a glued connection between the magnetic member 400 and the elastic member 201 and ensure the connection strength of the glued connection. After the magnetic member 400 is installed, the orthographic projection of the coil 120 along the thickness direction of the substrate 110 can cover the magnetic member 400, so that the alternating magnetic field generated by the coil 120 can effectively act on the lower magnetic member 400.

[0040] In other implementations, the magnetic component 400 may not be directly connected to the elastic component 201. For example, a movable component bracket is provided and the magnetic component 400 is installed on the movable component bracket. The magnetic component 400 drives the movable component bracket to move under the action of the magnetic field generated by the coil, thereby driving the transparent sheet to vibrate.

[0041] Referring to Figures 2, 3, and 4, during use of the pixel expansion device 10, projector light can enter the light hole 111 of the substrate 110, pass through the light-transmitting sheet 300, and exit through the light-transmitting hole 202, projecting onto the imaging object. As the light passes through the light-transmitting sheet 300, the coil 120 can be energized, generating an alternating magnetic field. Given that the magnetic member 400 is spaced apart from the substrate 110, the alternating magnetic field causes the magnetic member 400 to vibrate, thereby causing the light-transmitting sheet 300 to vibrate as desired, thereby achieving pixel enhancement and improving the resolution of the projector's light. Given the vibrations of the magnetic member 400 and the light-transmitting sheet 300, both can be considered movers. The elastic member 201 is connected between the stator 100 and the mover. The elastic member 201 provides a restoring force to return the mover to its initial position and balances the electromagnetic force exerted by the coil 120 on the magnetic member 400.

[0042] In other embodiments, the magnetic member 400 may not be provided, and other driving structures may be used to drive the cantilever unit 230 to swing, thereby causing the light-transmitting sheet 300 to swing along with the cantilever unit 230. Therefore, by causing the light-transmitting sheet 300 to swing along with the cantilever unit 230, a pixel enhancement effect can also be achieved, thereby improving the resolution of the light emitted by the projector.

[0043] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A pixel expansion device, characterized in that: include: The stator is provided with a light-through hole; an elastic mechanism connected to the stator, the elastic mechanism comprising a plurality of elastic members spaced apart along the circumference of the stator, the plurality of elastic members being arranged around the light-through hole, the elastic member comprising a fixing unit, a connecting unit, and a cantilever unit, the fixing unit being fixedly connected to the stator and spaced apart from the cantilever unit, the connecting unit being connected between the fixing unit and the cantilever unit; and The light-transmitting sheet is arranged on the cantilever unit, and the light-transmitting sheet can vibrate along with the cantilever unit.

2. The pixel expansion device according to claim 1, wherein: The cantilever unit includes a first cantilever portion and a second cantilever portion connected to each other, wherein the first cantilever portion extends along a first direction, and the second cantilever portion extends along a second direction that forms an angle with the first direction.

3. The pixel expansion device according to claim 2, wherein: The connecting unit includes a first connecting portion and a second connecting portion, the first connecting portion extends along the first direction and is connected between the fixing unit and the first cantilever portion, the first connecting portion is farther away from the light-through hole than the first cantilever portion, and a first gap extending along the first direction is formed between the first connecting portion and the first cantilever portion; the second connecting portion extends along the second direction and is connected between the fixing unit and the second cantilever portion, the second connecting portion is farther away from the light-through hole than the second cantilever portion, and a second gap extending along the second direction is formed between the second connecting portion and the first cantilever portion.

4. The pixel expansion device according to claim 2, wherein: One end of the connecting unit is connected to the fixing unit, and the other end of the connecting unit is connected to a connection point between the first cantilever portion and the second cantilever portion.

5. The pixel expansion device according to claim 1, wherein: It also includes a magnetic part, the stator can generate an alternating magnetic field, the magnetic part is arranged on the cantilever unit and spaced apart from the stator, and the magnetic part drives the light-transmitting sheet to vibrate under the action of the alternating magnetic field.

6. The pixel expansion device according to claim 5, wherein: The cantilever unit is provided with a first glue injection hole and a second glue injection hole. Both the first glue injection hole and the second glue injection hole pass through the cantilever unit along the thickness direction of the cantilever unit. The orthographic projection of the first glue injection hole in the thickness direction of the cantilever unit falls on the light-transmitting sheet, and the orthographic projection of the second glue injection hole in the thickness direction of the cantilever unit falls on the magnetic part.

7. The pixel expansion device according to claim 5, wherein: The light-transmitting sheet and the magnetic member are both arranged on the same surface in the thickness direction of the elastic mechanism, and the magnetic member is farther away from the light-through hole than the light-transmitting sheet.

8. The pixel expansion device according to claim 5, wherein: Also includes at least one of the following options: There are multiple magnetic members, and the same magnetic member is connected to two elastic members arranged adjacent to each other along the circumferential direction of the stator; The stator includes a substrate and a coil. The elastic member is connected to the substrate. The coil is arranged on a surface of the substrate facing the elastic member. The orthographic projection of the coil along the thickness direction of the substrate can cover the magnetic member.

9. The pixel expansion device according to claim 1, wherein: It also includes a positioning piece, which is fixedly connected to the stator. A positioning hole is opened on the elastic piece, and the positioning piece cooperates with the positioning hole.

10. The pixel expansion device according to claim 9, wherein: The positioning member includes a first positioning segment, a second positioning segment and a third positioning segment, the third positioning segment is connected between the first positioning segment and the second positioning segment, the cross-sectional dimensions of the first positioning segment and the second positioning segment are both smaller than the cross-sectional dimension of the third positioning segment, a mounting hole is provided on the stator, the first positioning segment cooperates with the mounting hole, the second positioning segment cooperates with the positioning hole, and the third positioning segment abuts between the elastic mechanism and the stator.

11. The pixel expansion device according to claim 10, wherein: A first glue storage groove located in the mounting hole is formed on the outer peripheral surface of the first positioning section, and a second glue storage groove located in the positioning hole is formed on the outer peripheral surface of the second positioning section.

12. The pixel expansion device according to claim 1, wherein: A plurality of elastic members form a light-transmitting hole, and the light-transmitting sheet covers the light-transmitting hole.

13. The pixel expansion device according to claim 12, wherein: The light-transmitting hole and the light-through hole are coaxially arranged.

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