Adjusting module and projector
By designing an adjustment module including a fixed plate, a movable plate and an adjustment unit, the imaging quality problem caused by the unbalanced optical path of the projector lens module is solved, and convenient adjustment and imaging confirmation methods are provided, which improves the efficiency and convenience of the projector.
Patent Information
- Application Number
- CN202311064921.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-08-23
- Publication Date
- 2025-02-25
AI Technical Summary
The existing projectors have poor imaging quality due to the imbalance of the lens module on the optical path, and the user is susceptible to direct imaging beams when adjusting the screws, and cannot confirm the imaging status immediately.
An adjustment module is designed, including a fixed plate, a movable plate and at least one adjustment unit. Through the cooperation of the actuator and the driven member, the movable plate and the lens module are moved along the second axis. The rotation axis of the adjustment unit is perpendicular to the second axis to avoid being blocked by the lens module. The user can instantly confirm the imaging condition.
Through this adjustment module, users can easily adjust the focus effect of the lens module and instantly confirm the imaging status of the projector, improving the efficiency and convenience of the projector.
Smart Images
Figure CN119511617A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a module and a projector, and in particular to an adjustment module and a projector using the same. Background Art
[0002] Today's projectors are prone to imbalance of the lens module relative to the optical path due to parts processing tolerance and assembly tolerance, resulting in poor image quality of the projector. For example, the lens module can be composed of multiple optical elements (e.g., lenses), and problems such as processing tolerance and assembly tolerance can cause the optical axes of these optical elements to be misaligned. Therefore, if the optical axis of the image beam transmitted by the light valve of the projector is aligned with the first optical element, when the image beam reaches the last optical element, the optical axis of the image beam will deviate from the optical axis of the last optical element, resulting in poor focusing effect of the image beam when it is projected from the lens module, thus affecting the image quality.
[0003] In order to improve the imaging quality of the projector, the lens module of the existing projector is set on a movable plate, and the movable plate can move relative to the fixed plate, thereby moving the lens module to adjust the focusing effect of the lens module. However, the existing movable plate and the fixed plate are fixed by screws, and the rotating shaft of the screw is parallel to the light emitting direction of the lens module, which requires the user to adjust the screw from the front of the lens module. At this time, the user is located in the light emitting direction of the lens module, and the image beam directly hits the user's eyes, which is dangerous, and the image beam will be blocked by the user and cannot be imaged. The user cannot immediately confirm the imaging status of the projector while adjusting the screw. In addition, since the outer mirror of the lens module is of different sizes, the screw may be blocked by the lens module, making it difficult for the user to adjust the screw from the front. Summary of the invention
[0004] The present invention provides an adjustment module and a projector, which are convenient for adjusting the focusing effect of a lens module and can instantly confirm the imaging status of the projector, so as to improve the use efficiency and convenience of the adjustment module and the projector.
[0005] Other purposes and advantages of the present invention can be further understood from the technical features disclosed in the present invention.
[0006] To achieve one or part or all of the above purposes or other purposes, the adjustment module of the present invention is used to adjust the boresight of the lens module. The adjustment module includes a fixed plate, a movable plate and at least one adjustment unit. The fixed plate has a first surface and a second surface relative to each other. The movable plate is movably connected to the first surface of the fixed plate. The movable plate is suitable for setting the lens module. When the lens module is set on the movable plate, the light-emitting surface of the lens module is on the same side as the first surface, and the light-incoming surface of the lens module is on the same side as the second surface. Each at least one adjustment unit includes an active member and a driven member. The active member is pivotally arranged on the fixed plate along a first axis and is linked to the driven member. The driven member is movably connected to the fixed plate and the movable plate along a second axis. The first axis is perpendicular to the second axis, and the second axis is parallel to the normal direction of the first surface. When the active member rotates with the first axis as the rotating axis, the active member drives the driven member to move the movable plate along the second axis.
[0007] To achieve one or part or all of the above purposes or other purposes, the projector of the present invention includes an illumination module, a light valve, a lens module and an adjustment module. The illumination module is used to provide an illumination beam. The light valve is arranged on the transmission path of the illumination beam to convert the illumination beam into an image beam. The lens module is arranged on the transmission path of the image beam to project the image beam. The adjustment module is used to adjust the visual axis of the lens module. The adjustment module includes a fixed plate, a movable plate and at least one adjustment unit. The fixed plate has a first surface and a second surface opposite to each other. The movable plate is movably connected to the first surface of the fixed plate, and the lens module is arranged on the movable plate. The light emitting surface of the lens module is on the same side as the first surface, and the light incident surface of the lens module is on the same side as the second surface. Each at least one adjustment unit includes an active member and a driven member. The active member is pivotally arranged on the fixed plate along a first axis and is linked to the driven member, and the driven member is movably connected to the fixed plate and the movable plate along a second axis. The first axis is perpendicular to the second axis, and the second axis is parallel to the normal direction of the first surface. When the active member rotates with the first axis as the rotation axis, the active member drives the driven member to move the movable plate along the second axis, thereby moving the lens module.
[0008] Based on the above, the adjustment module of the present invention and the projector using the same can move the movable plate and the lens module disposed on the movable plate relative to the fixed plate along the second axis by means of the active member of the adjustment unit. Since the rotation axis (i.e., the first axis) of the active member of the adjustment unit is perpendicular to the second axis (also the normal direction of the fixed plate), during the adjustment process, the adjustment unit will not be blocked by the lens module, and it is convenient for the user to rotate the active member, and the user can immediately confirm the imaging status of the projector to adjust the adjustment unit. In this way, the use efficiency and convenience of the adjustment module and the projector can be improved.
[0009] In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below with reference to the accompanying drawings for detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 is a simple block diagram of a projector according to an embodiment of the present invention.
[0011] Figure 2 yes Figure 1 Schematic diagram of some components of a projector.
[0012] Figure 3 yes Figure 2 Exploded view of the projector.
[0013] Figure 4 yes Figure 1 Front view of the adjustment module.
[0014] Figure 5 yes Figure 4 A partial enlarged view of the adjustment module.
[0015] Figure 6 yes Figure 5 Schematic diagram of the adjustment unit from another perspective.
[0016] Figure 7 is a schematic diagram of a projector according to another embodiment of the present invention. DETAILED DESCRIPTION
[0017] The above-mentioned other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only the directions with reference to the accompanying drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention.
[0018] Figure 1 is a simple block diagram of a projector according to an embodiment of the present invention. Figure 2 yes Figure 1 Schematic diagram of some components of a projector. Figure 3 yes Figure 2 Exploded view of the projector. Figure 4 yes Figure 1 Front view of the adjustment module. Figure 5 yes Figure 4 A partial enlarged view of the adjustment module. Figure 6 yes Figure 5 A schematic diagram of the adjustment unit of FIG. 1 from another perspective. Cartesian coordinates XYZ are provided here to facilitate component description.
[0019] Please also see Figures 1 to 6The projector 100a includes an illumination module 120, a light valve 130, a lens module 110, and an adjustment module 200. The illumination module 120 is used to provide an illumination beam 300. The light valve 130 is disposed on the transmission path of the illumination beam 300 to convert the illumination beam 300 into an image beam 400. The lens module 110 is disposed on the transmission path of the image beam 400 to project the image beam 400 out of the projector 100a. The adjustment module 200 can be used to adjust the boresight of the lens module 110.
[0020] Due to the processing tolerance and assembly tolerance of the components, the optical axis of the image beam 400 emitted by the light valve 130 may be misaligned with the visual axis of the lens module 110, resulting in poor focusing effect of the lens module 110, thereby affecting the imaging quality of the projector 100a. In this embodiment, adjusting the visual axis of the lens module 110 can be regarded as adjusting the relative position of the optical axis of the lens module 110 and the optical axis of the image beam 400 from the light valve 130, so as to improve the focusing effect of the lens module 110 on the image beam 400, thereby improving the imaging quality of the projector 100a.
[0021] The light valve 130 is, for example, a reflective light modulator such as a Liquid Crystal On Silicon panel (LCoS panel) or a Digital Micro-mirror Device (DMD). In some embodiments, the light valve 130 may also be a transmissive light modulator such as a Transparent Liquid Crystal Panel, an Electro-Optical Modulator, a Magneto-Optic modulator, or an Acousto-Optic Modulator (AOM). The present case does not limit the type and kind of the light valve 130. The detailed steps and implementation methods of the method of converting the illumination beam 300 into the image beam 400 by the light valve 130 can be sufficiently taught, suggested, and implemented by the common knowledge in the relevant technical field, so they are not repeated here. In the present embodiment, the number of the light valve 130 is one, for example, a projector 100a using a single Digital Micro-mirror Device, but in other embodiments, there may be multiple light valves, and it is not limited thereto.
[0022] The lens module 110 includes, for example, a combination of one or more optical lenses with refractive power, such as various combinations of non-planar lenses such as biconcave lenses, biconvex lenses, concave-convex lenses, convex-concave lenses, plano-convex lenses, and plano-concave lenses. In one embodiment, the lens module 110 may also include a planar optical lens to project the image beam 400 from the lens module 110 to a projection target (e.g., a wall) in a reflective manner. The present case does not limit the type and type of the lens module 110.
[0023] like Figure 2 and Figure 3 As shown, the adjustment module 200 includes a fixed plate 210, a movable plate 220 and at least one adjustment unit 230. The fixed plate 210 has a first surface S1 and a second surface S2 that are opposite to each other. The movable plate 220 is movably connected to the first surface S1 of the fixed plate 210, and the lens module 110 is disposed on the movable plate 220. The movable plate 220 includes a lens hole 226, and the fixed plate 210 includes an opening 216. During assembly, the lens module 110 first passes through the lens hole 226 of the movable plate 220 and is fixed to the movable plate 220 by a plurality of fasteners FA. The lens module 110 then passes through the opening 216 of the fixed plate 210, so that the movable plate 220 is movably connected to the first surface S1 of the fixed plate 210. At this time, the light emitting surface 112 of the lens module 110 is on the same side as the first surface S1, and the light incident surface 114 of the lens module 110 is on the same side as the second surface S2. The image beam 400 (see Figure 1 ) is projected out of the projector 100a from the light exiting surface 112 of the lens module 110. Figure 2 As shown, the projection direction of the image beam 400 is substantially parallel to the Y-axis.
[0024] like Figure 3 , Figure 5 and Figure 6 As shown, the adjustment unit 230 includes an active member 231 and a driven member 232. The active member 231 is pivotally disposed on the fixed plate 210 along the first axis L1 and is linked to the driven member 232. The driven member 232 is movably connected to the fixed plate 210 and the movable plate 220 along the second axis L2. The first axis L1 is perpendicular to the second axis L2, and the second axis L2 is parallel to the normal direction L of the first surface S1. In this embodiment, the second axis L2 is parallel to the Y axis. The active member 231 has a rotating end E1, and the rotating end E1 is located on the first axis L1. When the user rotates the rotating end E1 of the active member 231 and causes the active member 231 to rotate with the first axis L1 as the rotation axis, the active member 231 drives the driven member 232 to move the movable plate 220 along the second axis L2, thereby moving the lens module 110 disposed on the movable plate 220. In one embodiment, the moving direction of the movable plate 220 is parallel to the optical axis of the image beam 400.
[0025] Specifically, if Figures 4 to 6 As shown, the adjustment unit 230 of this embodiment further includes an elastic member 233, which is, for example, a spring. The follower 232 includes a head 236 and a neck 237 connected to each other, and the diameter D1 of the head 236 is greater than the diameter D2 of the neck 237. The elastic member 233 is sleeved on the neck 237. When the neck 237 of the follower 232 passes through the movable plate 220, the two opposite ends of the elastic member 233 respectively abut against the movable plate 220 and the fixed plate 210, so that the movable plate 220 is located between the elastic member 233 and the head 236. The head 236 abuts against the movable plate 220. The follower 232 is movably connected to the fixed plate 210 and the movable plate 220. The head 236 of the follower 232 is correspondingly connected to the active member 231.
[0026] The head 236 is, for example, a worm gear C3, and the neck 237 of the driven member 232 includes a thread C1. The driving member 231 includes a worm 234, and the driven member 232 is meshed with the worm 234 of the driving member 231 by the worm gear C3. The fixed plate 210 is provided with a screw hole C2 at a position corresponding to the neck 237 of the driven member 232, and the driven member 237 is screwed into the screw hole C2 of the fixed plate 210 by the thread C1. When the driving member 231 rotates with the first axis L1 as the rotation axis, the worm 234 on the driving member 231 drives the driven member 232 to rotate with the second axis L2 as the rotation axis. At this time, the neck 237 of the driven member 232 will change the relative position of the thread C1 and the screw hole C2 due to the rotation, and the elastic member 233 presses against the movable plate 220, so that the driven member 237 drives the movable plate 220 to move along the second axis L2.
[0027] Each active member 231 of the present embodiment corresponds to a first axis L1, and these first axes L1 are parallel to the Z axis, but are not limited thereto. In other embodiments, the first axis L1 may change with the arrangement of the active member 231, and is not an axis extending along a fixed direction. In the present embodiment, the first axis L1 is perpendicular to the second axis L2 (normal direction L). The rotating end E1 of the active member 231 faces upward (i.e., +Z axis direction), so that the user can operate from the top to rotate the active member 231.
[0028] For example, when the worm 234 of the active member 231 rotates clockwise, the worm wheel C3 (head 236) of the driven member 232 is driven to rotate counterclockwise, and the thread C1 (neck 237) rotates counterclockwise relative to the screw hole C2, causing the driven member 232 to move forward along the second axis L2 (i.e., +Y axis direction) as a whole. At this time, the elastic member 233 pushes the movable plate 220, causing the movable plate 220 and the driven member 232 to move forward along the second axis L2 relative to the fixed plate 210 at the same time. When the worm 234 of the active member 231 rotates counterclockwise, the worm wheel C3 of the driven member 232 is driven to rotate clockwise, causing the thread C1 to rotate clockwise relative to the screw hole C2, causing the driven member 232 to move backward along the second axis L2 (i.e., -Y axis direction) as a whole. At this time, the movable plate 220 is pushed by the head 236 of the follower 232 to move backward and press the elastic member 233, so that the elastic member 233 is deformed and accumulates elastic force.
[0029] like Figure 4 As shown, the number of the adjustment units 230 of this embodiment is three, and there is an angle A between the end point E2 (for example, the axis of the worm gear C3) of the follower 232 of two adjacent adjustment units 230 and the center of the fixed plate 210 (or the opening 216), and the angle A is 120 degrees. That is, the distance between two adjacent adjustment units 230 is equal. The three end points E2 of the three follower 232 are located on the virtual plane P, and the virtual plane P is parallel to the movable plate 220. By adjusting the active member 231 of any adjustment unit 230, the follower 232 moves along the second axis L2, and then the relative displacement of the entire virtual plane P (movable plate 220) and the fixed plate 210 on the X axis, Y axis and Z axis can be adjusted. In other embodiments, the angles between the endpoints E2 (e.g., the axis of the worm gear C3) of the followers 232 of two adjacent adjustment units 230 and the center of the fixed plate 210 may not be equal, as long as the relative displacement of the entire virtual plane P (movable plate 220) and the fixed plate 210 on the X-axis, Y-axis, and Z-axis can be adjusted.
[0030] The lens module 110 can adjust the visual axis of the lens module 110 by moving the movable plate 220 relative to the fixed plate 210, so as to change the focusing effect of the image beam 400 projected by the lens module 110, thereby changing the projection effect of the projector 100a. In this way, the imbalance problem of the lens module 110 (projector 100a) caused by manufacturing and assembly tolerances can be improved or solved, so as to improve the imaging quality of the projector 100a.
[0031] like Figure 2As shown, the rotation axis (i.e., the first axis L1) of the active member 231 of the adjustment unit 230 of the present embodiment is perpendicular to the projection direction (i.e., the second axis L2 or the normal line L) of the image beam 400. In the process of adjusting the visual axis of the lens module 110, the user can rotate the active member 231 from the top (in the +Z axis direction) to drive the driven member 232 to move, thereby preventing the user's eyes from being directly illuminated by the image beam 400, and the image beam 400 will not be blocked by the user and can be smoothly imaged (for example, projected onto a wall). The user can instantly confirm the imaging status of the projector 100a while adjusting the visual axis of the lens module 110 to instantly adjust the adjustment unit 230. In addition, the rotation of the active member 231 will not be affected by the size of the outer mirror 116 of the lens module 110 in the front (in the +Y axis direction), and the use efficiency and convenience of the projector 100a and the adjustment module 200 can be improved.
[0032] In addition, if Figure 3 , Figure 5 and Figure 6 As shown, the fixed plate 210 includes at least one fixing member 214 and at least one positioning column 212. The number of the fixing members 214 and the positioning column 212 corresponds to the number of the adjusting units 230 and is three. The positioning column 212 is arranged beside the fixing member 214. The movable plate 220 includes at least one mounting hole 222. The number of the mounting holes 222 corresponds to the number of the driven members 232 of the adjusting unit 230 and is three. The driving member 231 is pivotally connected to the fixing member 214 along the first axis L1. The neck 237 of the driven member 232 passes through the mounting hole 222 and is inserted into the positioning column 212. The elastic member 233 is partially sleeved on the positioning column 212. The positioning column 212 extends along the second axis L2, and can ensure that the driven member 232 moves along the second axis L2.
[0033] like Figure 6 As shown, the size of the mounting hole 222 of the movable plate 220 corresponds to the diameter D2 of the neck 237, and the head 236 presses against the movable plate 220. The positioning column 212 is a hollow cavity 213 to form a screw hole C2 ( Figure 6 ).like Figure 5As shown, the worm 234 of the active component 231 of the present embodiment is a hollow cylinder 238, and the active component 231 also includes a rod body 235, but is not limited thereto. In an embodiment not shown, the active component 231 may be an integrated worm 234 (i.e., the hollow cylinder 238 and the rod body 235 are integrated). The rotating end E1 of the active component 231 is located at the rod body 235. The adjustment unit 230 of the present embodiment also includes at least two retaining rings 239. When the active component 231 is to be assembled to the fixing component 214, the hollow cylinder 238 is first placed in the fixing component 214. Then, the rod body 235 passes through the fixing component 214 and the worm 234 (hollow cylinder 238) along the first axis L1 and is fixed to the worm 234 (hollow cylinder 238) by two retaining rings 239. The two buckle rings 239 are sleeved on the rod body 235 and located at opposite ends of the worm 234 (hollow cylinder 238 ), so that the rod body 235 is fixed to the worm 234 and the worm 234 can be driven to rotate.
[0034] Figure 7 is a schematic diagram of a projector according to another embodiment of the present invention. Figure 2 and Figure 7 The projector 100b of this embodiment is similar to the aforementioned embodiment, and the difference between the two is that the three first axes L11, L12, and L13 of this embodiment are parallel to the X axis, and the three rotating ends E1 of the three active members 231a, 231b, and 231c face the left (i.e., the +X axis direction). The user can rotate the active members 231a, 231b, and 231c from the left, but is not limited thereto. In an embodiment not shown, the three first axes L11, L12, and L13 can extend in different directions perpendicular to the second axis L2.
[0035] For example, the two active members 231a and 231c can be arranged along the X-axis direction so that the two first axes L11 and L13 are parallel to the X-axis. The two rotating ends E1 of the two active members 231a and 231c can face different directions (+X-axis direction and -X-axis direction), respectively. The user can rotate the active member 231a from the left and the active member 231c from the right. The active member 231b can be arranged along the Z-axis direction so that the first axis L12 is parallel to the Z-axis. The user can rotate the active member 231b from the top. The user can rotate the active members 231a, 231b, and 231c from three different directions. In another embodiment not shown, the first axes L11, L12, and L13 can be inclined to the X-axis and the Z-axis. No matter how the active members 231a, 231b, and 231c are arranged, the first axes L11, L12, and L13 are always perpendicular to the second axis L2. The user can choose a suitable setting method according to his needs.
[0036] In summary, the adjustment module of the present invention and the projector using the same can move the movable plate and the lens module disposed on the movable plate relative to the fixed plate along the second axis by means of the active member of the adjustment unit. Since the rotation axis (i.e., the first axis) of the active member of the adjustment unit is perpendicular to the second axis (also the normal direction of the fixed plate), the adjustment unit will not be blocked by the lens module during the adjustment process, and it is convenient for the user to rotate the active member, and the user can immediately confirm the imaging status of the projector to adjust the adjustment unit. In this way, the use efficiency and convenience of the adjustment module and the projector can be improved.
[0037] However, the above is only a preferred embodiment of the present invention, and it cannot be used to limit the scope of the implementation of the present invention. That is, all simple equivalent changes and modifications made according to the claims and the content of the invention are still within the scope of the patent of the present invention. In addition, any embodiment or claim of the present invention does not need to achieve all the purposes, advantages or features disclosed by the present invention. In addition, the abstract and title (invention name) are only used to assist in the retrieval of patent documents, and are not used to limit the scope of rights of the present invention. In addition, the terms "first", "second", etc. mentioned in this specification or claims are only used to name the name of the element or distinguish different embodiments or scopes, and are not used to limit the upper or lower limit on the number of elements.
Claims
1. An adjustment module for adjusting the visual axis of a lens module, characterized in that: The adjustment module includes a fixed plate, a movable plate and at least one adjustment unit, wherein: The fixing plate has a first surface and a second surface opposite to each other; The movable plate is movably connected to the first surface of the fixed plate, and the movable plate is suitable for setting the lens module. When the lens module is set on the movable plate, the light emitting surface of the lens module is on the same side as the first surface, and the light incident surface of the lens module is on the same side as the second surface; and Each of the at least one adjustment units includes an active member and a driven member, wherein the active member is pivotally disposed on the fixed plate along a first axis and is linked to the driven member, and the driven member is movably connected to the fixed plate and the movable plate along a second axis, wherein the first axis is perpendicular to the second axis, and the second axis is parallel to the normal direction of the first surface. When the active member rotates with the first axis as the rotation axis, the active member drives the driven member to move the movable plate along the second axis.
2. The adjustment module according to claim 1, characterized in that: The follower includes a head and a neck connected to each other, the diameter of the head is larger than the diameter of the neck, the neck passes through the movable plate, the follower is movably connected to the fixed plate and the movable plate, and the head is correspondingly connected to the active member.
3. The adjustment module according to claim 2, characterized in that: The active member includes a worm, the head of the driven member is a worm wheel, and the driven member is engaged with the worm of the active member with the worm wheel. When the active member rotates with the first axis as the rotation axis, the worm on the active member drives the driven member to rotate with the second axis as the rotation axis.
4. The adjustment module according to claim 2, characterized in that: The neck of the follower includes a thread, and the fixed plate is provided with a screw hole at a position corresponding to the follower. The follower is screwed into the screw hole of the fixed plate with the thread. When the follower is driven by the active member and rotates with the second axis as the axis, the neck of the follower will change the relative position of the thread and the screw hole due to the rotation, so that the follower drives the movable plate to move along the second axis.
5. The adjustment module according to claim 4, characterized in that: The fixing plate includes at least one positioning column extending along the second axis, and the at least one positioning column is a hollow cavity to form the screw hole in the cavity.
6. The adjustment module according to claim 3, characterized in that: The worm of the active component is a hollow cylinder, and the active component further comprises a rod body, which is passed through and fixed to the worm.
7. The adjustment module according to claim 6, characterized in that: Each of the at least one adjusting unit further includes at least two buckling rings, which are sleeved on the rod body and located at opposite ends of the worm.
8. The adjustment module according to claim 1, characterized in that: Each of the at least one adjustment unit further includes an elastic member, and the elastic member abuts against the movable plate and the fixed plate.
9. The adjustment module according to claim 2, characterized in that: Each of the at least one adjustment units also includes an elastic member, which is sleeved on the neck of the follower, and when the neck passes through the movable plate, the elastic member abuts against the movable plate and the fixed plate, so that the movable plate is located between the elastic member and the head.
10. The adjustment module according to claim 1, characterized in that: The number of the at least one adjustment unit is three.
11. The adjustment module according to claim 1, characterized in that: The fixing plate includes at least one fixing member, and the at least one active member is pivotally connected to the at least one fixing member along the first axis.
12. A projector, characterized in that: The projector comprises an illumination module, a light valve, a lens module and an adjustment module, wherein: The lighting module is used to provide a lighting beam; The light valve is disposed on the transmission path of the illumination light beam, and is used to convert the illumination light beam into an image light beam; The lens module is disposed on the transmission path of the image light beam to project the image light beam; and The adjustment module is used to adjust the visual axis of the lens module, and includes a fixed plate, a movable plate and at least one adjustment unit, wherein: The fixing plate has a first surface and a second surface opposite to each other; The movable plate is movably connected to the first surface of the fixed plate, the lens module is disposed on the movable plate, the light emitting surface of the lens module is on the same side as the first surface, and the light incident surface of the lens module is on the same side as the second surface; and Each of the at least one adjustment units includes an active member and a driven member, wherein the active member is pivotally disposed on the fixed plate along a first axis and is linked to the driven member, and the driven member is movably connected to the fixed plate and the movable plate along a second axis, wherein the first axis is perpendicular to the second axis, and the second axis is parallel to the normal direction of the first surface. When the active member rotates with the first axis as the rotation axis, the active member drives the driven member to move the movable plate along the second axis, thereby moving the lens module.
13. The projector according to claim 12, characterized in that: The follower includes a head and a neck connected to each other, the diameter of the head is larger than the diameter of the neck, the neck passes through the movable plate, the follower is movably connected to the fixed plate and the movable plate, and the head is correspondingly connected to the active member.
14. The projector according to claim 13, characterized in that: The active member includes a worm, the head of the driven member is a worm wheel, and the driven member is engaged with the worm of the active member with the worm wheel. When the active member rotates with the first axis as the rotation axis, the worm on the active member drives the driven member to rotate with the second axis as the rotation axis.
15. The projector according to claim 13, characterized in that: The neck of the follower includes a thread, and the fixed plate is provided with a screw hole at a position corresponding to the follower. The follower is screwed into the screw hole of the fixed plate with the thread. When the follower is driven by the active member and rotates with the second axis as the axis, the neck of the follower will change the relative position of the thread and the screw hole due to the rotation, so that the follower drives the movable plate to move along the second axis.
16. The projector according to claim 15, characterized in that: The fixing plate includes at least one positioning column extending along the second axis, and the at least one positioning column is a hollow cavity to form the screw hole in the cavity.
17. The projector according to claim 14, characterized in that: The worm of the active component is a hollow cylinder, and the active component further comprises a rod body, which is passed through and fixed to the worm. 18 . The projector according to claim 17 , wherein each of the at least one adjustment unit further comprises at least two buckle rings, and the at least two buckle rings are sleeved on the rod body and located at opposite ends of the worm.
19. The projector according to claim 13, characterized in that: Each of the at least one adjustment units also includes an elastic member, which is sleeved on the neck of the follower, and when the neck passes through the movable plate, the elastic member abuts against the movable plate and the fixed plate, so that the movable plate is located between the elastic member and the head.
20. The projector according to claim 12, characterized in that The number of the at least one adjustment unit is three.
21. The projector according to claim 12, characterized in that: The fixing plate includes at least one fixing member, and the at least one active member is pivotally connected to the at least one fixing member along the first axis.