Adjustment module, projection device and control method of projection device

Abstract

The invention relates to an adjusting module, which is used for adjusting a boreslight of a lens module. The adjusting module comprises a fixed plate, a movable plate and at least one adjusting unit. The movable plate is movably connected to the first surface of the fixed plate, and the lens module is arranged on the movable plate. Each adjusting unit comprises a driving part, a first gear and a driven part. The driving part is connected to the first gear along the transmission shaft and located between the fixing plate and the first gear. The first gear is connected to the driven piece, and the driven piece is movably connected to the fixed plate and the movable plate along the rotating shaft. The rotating shaft is parallel to the transmission shaft. When the driving part drives the first gear to rotate, the first gear drives the driven part to rotate with the rotating shaft as the center, and the movable plate moves along the rotating shaft. In addition, a projection device and a control method of the projection device are also provided. According to the adjusting module, the projection device and the control method of the projection device, the focusing effect of the lens module is convenient to adjust, so that the use efficiency and the use convenience of the adjusting module and the projection device are improved.

Description

Technical Field

[0001] The invention relates to an adjustment module, a projection device using the same and a control method of the projection device 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 will make it impossible for these optical elements to produce the expected image quality after combination. 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, and manual rotation of the screw is prone to errors. Summary of the invention

[0004] The present invention provides an adjustment module, a projection device and a control method of the projection device, which are convenient for adjusting the focusing effect of a lens module, so as to improve the use efficiency and convenience of the adjustment module and the projection device.

[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 opposite to each other. The movable plate is movably connected to the first surface of the fixed plate, and the lens module is suitable for being arranged on the movable plate. The lens module has a light-emitting surface and a light-entering surface. When the lens module is arranged on the movable plate, the light-emitting surface is on the same side as the first surface, and the light-entering surface is on the same side as the second surface. Each adjustment unit includes a driving member, a first gear and a driven member. The driving member is connected to the first gear along the transmission shaft, and the driving member is located between the fixed plate and the first gear. The first gear is connected to the driven member and the driven member is movably connected to the fixed plate and the movable plate along the rotating shaft. The rotating shaft is parallel to the transmission shaft. When the driving member drives the first gear to rotate around the transmission shaft, the first gear drives the driven member to rotate around the rotating shaft, so that the movable plate moves along the rotating shaft.

[0007] To achieve one or part or all of the above purposes or other purposes, the projection device 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 lens module has a light-emitting surface and a light-entering surface. 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. The lens module is arranged on the movable plate, the light-emitting surface is on the same side as the first surface, and the light-entering surface is on the same side as the second surface. Each adjustment unit includes a driving member, a first gear and a driven member. The driving member is connected to the first gear along the transmission shaft, and the driving member is located between the fixed plate and the first gear. The first gear is connected to the driven member and the driven member is movably connected to the fixed plate and the movable plate along the rotating shaft, and the rotating shaft is parallel to the transmission shaft. When the driving member drives the first gear to rotate around the transmission shaft, the first gear drives the driven member to rotate around the rotating shaft, so that the movable plate moves along the rotating shaft.

[0008] To achieve one or part or all of the above purposes or other purposes, the projection device of the control method of the projection device of the present invention includes a lens module, an adjustment module, and the adjustment module includes a fixed plate, a movable plate, at least one adjustment unit and a control component. The lens module is arranged on the movable plate, the movable plate is movably connected to the fixed plate, and the control component is electrically connected to the at least one adjustment unit. Each of the at least one adjustment units includes a driving member, a first gear and a follower. The driving member is connected to the first gear, the first gear is connected to the follower, and the follower is movably connected to the fixed plate and the movable plate along the rotating shaft. The control method includes the following steps: receiving an adjustment signal by the control component and converting the adjustment signal into a driving signal, and driving at least one of the driving members in the adjustment module according to the driving signal by the control component, so that at least one of the corresponding first gears rotates, and drives at least one of the corresponding follower to rotate, so that the movable plate and the lens module move relative to the fixed plate along the rotating shaft to adjust the visual axis of the lens module.

[0009] Based on the above, the adjustment module of the present invention, the projection device using the same, and the control method of the projection device using the same can drive the follower of the adjustment unit of the adjustment module and the first gear to move along the rotation axis, so that the movable plate and the lens module disposed on the movable plate can move relative to the fixed plate along the rotation axis. In this way, the focusing effect of the lens module can be adjusted to improve the use efficiency and convenience of the adjustment module and the projection device.

[0010] In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a simple block diagram of a projection device according to an embodiment of the present invention.

[0012] Figure 2 yes Figure 1 Schematic diagram of some components of a projection device.

[0013] Figure 3 yes Figure 2 Exploded view of the projection device.

[0014] Figure 4 yes Figure 3 Schematic diagram of an adjustment module of a projection device.

[0015] Figure 5 yes Figure 4 Partial schematic diagram of the adjustment module.

[0016] Figure 6 is a flow chart of a method for controlling a projection device according to an embodiment of the present invention.

[0017] Figure 7 yes Figure 6 Another flow chart of a control method. DETAILED DESCRIPTION

[0018] The above and 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 referenced to the directions of the accompanying drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention.

[0019] Figure 1 is a simple block diagram of a projection device according to an embodiment of the present invention. Figure 2 yes Figure 1 Schematic diagram of some components of a projection device. Figure 3 yes Figure 2 Exploded view of the projection device. Figure 4 yes Figure 3 Schematic diagram of an adjustment module of a projection device. Figure 5 yes Figure 4 A partial schematic diagram of the adjustment module. Cartesian coordinates XYZ are provided here to facilitate component description. Please also refer to Figures 1 to 5 The projection device 100 includes an illumination module 110, a light valve 120, a lens module 130, and an adjustment module 200. The illumination module 110 is used to provide an illumination beam 300. The light valve 120 is disposed on the transmission path of the illumination beam 300, and is used to convert the illumination beam 300 into an image beam 400. The lens module 130 is disposed on the transmission path of the image beam 400, and is used to project the image beam 400 out of the projection device 100. The adjustment module 200 is connected to the lens module 130, and is used to adjust the boresight of the lens module 130.

[0020] Due to the processing tolerance and assembly tolerance of components, the optical axis of the image beam 400 emitted by the light valve 120 may be misaligned with the visual axis of the lens module 130, resulting in poor focusing effect of the lens module 130, thereby affecting the imaging quality of the projection device 100. In this embodiment, adjusting the visual axis of the lens module 130 can be regarded as adjusting the relative position of the optical axis of the lens module 130 and the optical axis of the image beam 400 from the light valve 120, so as to improve the focusing effect of the lens module 130 on the image beam 400, thereby improving the imaging quality of the projection device 100.

[0021] The light valve 120 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 120 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 invention does not limit the type and kind of the light valve 120. The detailed steps and implementation methods of the method of converting the illumination light beam 300 into the image light beam 400 by the light valve 120 can be sufficiently taught, suggested, and implemented by the common knowledge in the relevant technical field, and thus will not be described in detail. In the present embodiment, the number of the light valve 120 is one, for example, a projection device 100 using a single digital micromirror device, but in other embodiments, the number of the light valve 120 may be multiple, and the present invention is not limited thereto.

[0022] The lens module 130 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 130 may also include a planar optical lens to project the image beam 400 from the lens module 130 to a projection target (e.g., a wall) in a reflective manner. The present invention does not limit the type and type of the lens module 130.

[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. The fixed plate 210 has an opposite first surface 212, a second surface 214 and a first hole 213. The movable plate 220 has a second hole 223. The at least one adjustment unit means that in different embodiments, the number of adjustment units can be designed differently, but the minimum number of adjustment units is one. The number of adjustment units 230a, 230b, and 230c in this embodiment is three. The movable plate 220 is movably connected to the first surface 212 of the fixed plate 210 through the adjustment units 230a, 230b, and 230c.

[0024] The lens module 130 has a light emitting surface 132 and a light incident surface 134, and the lens module 130 is suitable for being set on the movable plate 220. During assembly, part of the lens module 130 first passes through the second hole 223 of the movable plate 220 and can be fixedly set on the movable plate 220 by a plurality of fasteners (e.g., screws). The part of the lens module 130 that passes through the second hole 223 of the movable plate 220 is then set on the movable plate 220 by passing through the first hole 213 of the fixed plate 210, and the movable plate 220 is movably connected to the fixed plate 210. The size of the first hole 213 is slightly larger than the part of the lens module 130 that passes through the second hole 223 of the movable plate 220. At this time, the light incident surface 134 of the lens module 130 is on the same side as the second surface 214 of the fixed plate 210, and the light emitting surface 132 of the lens module 130 is on the same side as the first surface 212 of the fixed plate 210. Image beam 400 (see Figure 1 ) projects the projection device 100 from the light exiting surface 132 of the lens module 130. Figure 2 As shown, the projection direction of the image beam 400 is substantially parallel to the Y-axis.

[0025] like Figures 3 to 5 As shown, each adjustment unit 230a, 230b, 230c includes a corresponding driving member 231a, 231b, 231c, a first gear 232 and a driven member 233. Each driving member 231a, 231b, 231c is connected to the first gear 232 along a corresponding transmission axis R1. The transmission axis R1 is parallel to the Y axis. In this embodiment, each driving member 231a, 231b, 231c corresponds to a transmission axis R1, and each transmission axis R1 can be changed with the arrangement of the driving members 231a, 231b, 231c, rather than being an axis extending in a fixed direction. Each driving member 231a, 231b, 231c includes a transmission rod 239, which passes through the first gear 232 and is connected and fixed to the first gear 232. Each driving member 231a, 231b, 231c can drive the first gear 232 through the corresponding transmission rod 239, so that the first gear 232 rotates around the transmission axis R1.

[0026] Each driving member 231a, 231b, 231c can be respectively disposed on the fixing plate 210 by a plurality of fasteners S (e.g., screws). The fasteners S can be connected to the corresponding fixing members 215 on the fixing plate 210. The number of fixing members 215 in this embodiment is six, and two fixing members 215 are used to fix one driving member 231a (231b or 231c), but the present invention is not limited thereto. Each driving member 231a, 231b, 231c is located between the fixing plate 210 and the first gear 232 in the direction of its corresponding transmission axis R1 (i.e., the Y-axis direction).

[0027] like Figure 5As shown, the follower 233 is movably connected to the fixed plate 210 and the movable plate 220 along the rotation axis R2. The rotation axis R2 is parallel to the transmission axis R1. The follower 233 includes a head 234 and a neck 235 connected to each other, and the diameter D1 of the head 234 is greater than the diameter D2 of the neck 235. The neck 235 penetrates the movable plate 220 and is movably connected to the fixed plate 210 and the movable plate 220, and the head 234 is correspondingly connected to the first gear 232. In addition, each adjusting unit 230a, 230b, 230c in the adjustment module 200 further includes an elastic member 238, and the elastic member 238 is sleeved on the neck 235 of the follower 233. When the neck 235 of the follower 233 passes through the movable plate 220 and is disposed on the fixed plate 210, two opposite ends of the elastic member 238 respectively abut against the movable plate 220 and the fixed plate 210, so that the movable plate 220 is located between the elastic member 238 and the head 234. In one embodiment, the elastic member 238 is, for example, a spring.

[0028] Specifically, the head 234 of the follower 233 is a second gear 236, and the first gear 232 is meshed with the second gear 236, so that the first gear 232 is connected to the follower 233. The neck 235 includes a thread 237, and the fixing plate 210 is provided with a screw hole 216 at a position corresponding to the follower 233, and the follower 233 is screwed into the screw hole 216 of the fixing plate 210 through the thread 237.

[0029] The fixing plate 210 includes at least one positioning column 217, and the positioning column 217 is disposed next to the corresponding fixing member 215. The number of the positioning columns 217 corresponds to the number of the adjustment units 230a, 230b, and 230c, and is three. The positioning column 217 is a hollow cavity, and the screw hole 216 can be formed in the cavity of the positioning column 217 ( Figure 5 ), so that the neck 235 of the follower 233 is inserted into the positioning column 217 and connected to the fixed plate 210. The movable plate 220 includes at least one mounting hole 225, and the number of the mounting holes 225 corresponds to the number of the follower 233 (or the adjustment units 230a, 230b, 230c), which is three. The neck 235 of the follower 233 passes through the mounting hole 225 of the movable plate 220 and is inserted into the positioning column 217. The size of the mounting hole 225 corresponds to the diameter D2 of the neck 235, so that the head 234 of the follower 233 presses against the movable plate 220. The elastic member 238 is partially sleeved on the positioning column 217. The positioning column 217 extends along the rotation axis R2, and can ensure that the follower 233 moves along the rotation axis R2.

[0030] When one of the driving members 231a, 231b, 231c drives the corresponding first gear 232 to rotate around the transmission axis R1, the first gear 232 drives the second gear 236 (i.e., the head 234) of the driven member 233 to rotate around the rotation axis R2. At this time, the neck 235 will change the relative position of the thread 237 and the screw hole 216 of the fixed plate 210 due to the rotation, so that the driven member 233 moves relative to the fixed plate 210 along the rotation axis R2, and drives the movable plate 220 to move relative to the fixed plate 210 along the rotation axis R2.

[0031] For example, when one of the driving members 231a, 231b, 231c drives the corresponding first gear 232 to rotate in the clockwise direction, the second gear 236 (i.e., the head 234) of the driven member 233 is driven to rotate in the counterclockwise direction, and the thread 237 (i.e., the neck 235) rotates in the counterclockwise direction relative to the screw hole 216, causing the driven member 233 to move forward along the rotation axis R2 (i.e., the +Y axis direction) as a whole. At this time, the elastic member 238 pushes the movable plate 220 by elastic force, so that the movable plate 220 moves forward along the rotation axis R2 relative to the fixed plate 210. When one of the driving members 231a, 231b, 231c drives the corresponding first gear 232 to rotate counterclockwise, the second gear 236 of the follower 233 is driven to rotate clockwise, and the thread 237 of the neck 235 of the follower 233 rotates clockwise relative to the screw hole 216, causing the follower 233 to move backward (i.e., -Y axis direction) along the rotation axis R2. At this time, the movable plate 220 is pushed by the head 234 (i.e., the second gear 236) of the follower 233 and moves backward and presses the elastic member 238, which deforms and accumulates elastic force.

[0032] like Figure 4 As shown, in the three adjustment units 230a, 230b, and 230c of this embodiment, there is an angle A between the end point E1 of the follower 233 of two adjacent adjustment units (for example, the axis of the second gear 236) and the center E2 of the fixing plate 210 (or the second hole 223), and the angle A is 120 degrees. That is, the distance between two adjacent adjustment units is equal. The three end points E1 of the three follower 233 are located on the virtual plane P ( Figure 5), the virtual plane P is parallel to the movable plate 220. By driving the driving member corresponding to any of the adjustment units 230a, 230b, 230c, the follower 233 corresponding to the driving member moves along the rotation axis R2, thereby adjusting 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, so as to adjust the relative position of the lens module 130 and the fixed plate 210. In other embodiments, the angles between the endpoints E1 (for example, the axis of the second gear 236) of the follower 233 of two adjacent adjustment units and the center E2 of the fixed plate 210 (or the second hole 223) 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.

[0033] like Figure 1 As shown, the adjustment module 200 may further include a control component 240 for controlling the actuation of each adjustment unit 230a, 230b, 230c. The control component 240 is electrically connected to the three driving components 231a, 231b, 231c of the three adjustment units 230a, 230b, 230c, and can drive at least one driving component 231a, 231b, 231c of the three adjustment units 230a, 230b, 230c according to the adjustment signal S1. The control component 240 includes a receiving unit 241, a control unit 242 and a driving unit 243 that are communicatively connected to each other. The projection device 100 also includes an input component 140. The input component 140 can be used to generate the adjustment signal S1, and the input component 140 is communicatively connected to the control component 240 to transmit the adjustment signal S1 to the receiving unit 241 of the control component 240.

[0034] The input component 140 of the present embodiment is, for example, a control panel, an infrared remote controller, or a wireless network remote controller of the projection device 100. The input component 140 can also be used to control the power supply of the projection device 100. The receiving unit 241 is, for example, a signal transceiver, and the receiving unit 241 can further include a wireless communication unit 244, so that the receiving unit 241 can receive the adjustment signal S1 wirelessly. The user can connect an external computer (not shown) and the projection device 100 via Wifi to input control instructions using the user interface on the computer, and the computer transmits the control instruction (adjustment signal S1) packet to the control component 240 via a wired or wireless network such as LAN, WiFi, or Bluetooth. The receiving unit 241 of the control component 240 can receive the adjustment signal S1 in a wired or wireless manner, and transmit the adjustment signal S1 to the control unit 242.

[0035] like Figure 1As shown, the control unit 242 may include one or more processors to process the adjustment signal S1 transmitted from the receiving unit 241, and convert the adjustment signal S1 into a driving signal S2, and transmit it to the driving unit 243. The driving unit 243 may be a driving circuit, and the driving unit 243 is used to provide the required power to the driving elements 231a, 231b, 231c and drive at least one driving element 231a, 231b, 231c of the three adjustment units 230a, 230b, 230c according to the driving signal S2.

[0036] In addition, the projection device 100 further includes a light sensor module 150, which is electrically connected to the control component 240 and is used to sense the relative position of the lens module 130 and the fixed plate 210, and generate an adjustment signal S1. In detail, the light sensor module 150 includes a light sensor. In one embodiment, the light sensor can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) image sensor, but is not limited to the above. It can be seen that the projection device 100 can input the adjustment signal S1 through the input component 140, or generate the adjustment signal S1 through the light sensor module 150, and then transmit the adjustment signal S1 to the receiving unit 241 of the control component 240. The control component 240 electrically drives the driving member 231a (231b or 231c) according to the aforementioned adjustment signal S1, so that the corresponding first gear 232 rotates and drives the driven member 233, the movable plate 220 and the lens module 130 to move relative to the fixed plate 210.

[0037] Figure 6 is a flow chart of a method for controlling a projection device according to an embodiment of the present invention. Figure 7 yes Figure 6 Another flowchart of the control method of the projection device is as follows. Figures 1 to 5 The projection device 100 is provided. Figure 1 , Figure 6 and Figure 7 The control method includes steps S510, S520, and S530. Step S510 is a user manually inputting an adjustment signal S1. The adjustment signal S1 is inputted, for example, through the aforementioned input component 140 (control panel, infrared remote controller, or wireless network remote controller). After the user manually inputs the adjustment signal S1, step S520 is executed.

[0038] Step S520 is to receive the adjustment signal S1 through the control component 240 and convert the adjustment signal S1 into the driving signal S2. Specifically, step S520 includes steps S521, S522, S523, and S524. Figure 7As shown, step S521 is that the receiving unit 241 receives the adjustment signal S1. The receiving unit 241 receives the adjustment signal S1 from the input component 140 or the optical sensor module 150. After step S521 is executed, step S522 is executed. Step S522 is that the receiving unit 241 transmits the adjustment signal S1 to the control unit 242. The adjustment signal S1 is received by the receiving unit 241 through wired or wireless transmission, for example.

[0039] After step S522 is completed, step S523 is then executed. Step S523 is for the control unit 242 to convert the adjustment signal S1 into the driving signal S2. The adjustment signal S1 is converted into the driving signal S2 by, for example, an algorithm or a function. After step S523 is completed, step S524 is then executed. Step S524 is for the control unit 242 to transmit the driving signal S2 to the driving unit 243. At this point, step S520 is completed.

[0040] After step S520 (step S524) is completed, step S530 ( Figure 6 In step S530, the driving unit 243 of the control assembly 240 drives at least one driving member 231a, 231b, 231c of the three adjustment units 230a, 230b, 230c according to the driving signal S2, so that the corresponding at least one first gear 232 rotates, and drives the corresponding at least one follower 233 to rotate, so that the movable plate 220 and the lens module 130 move relative to the fixed plate 210 along the rotation axis R2, so as to adjust the visual axis of the lens module 130.

[0041] The driving members 231a, 231b, and 231c of this embodiment are, for example, stepper motors. The driving signal S2 is, for example, a motor control signal. The driving signal S2 includes selection information of the driving members 231a, 231b, and 231c to be actuated, the rotation direction of the driving members 231a, 231b, and 231c to be actuated, and the number of rotation steps of the driving members 231a, 231b, and 231c to be actuated. For example, the selection information is, for example, selecting to drive two driving members 231a and 231b. The rotation direction is, for example, to rotate the driving member 231a in a clockwise direction and to rotate the driving member 231b in a counterclockwise direction. The number of rotation steps is, for example, to rotate the driving member 231a by one step and to rotate the driving member 231b by three steps. In this way, the user can control the adjustment module 200 through the input component 140, and the adjustment module 200 electrically adjusts the visual axis of the lens module 130. The user does not need to manually adjust the lens module 130 , which can improve the convenience of using the projection device 100 .

[0042] The control method of this embodiment further includes steps S541, S542, S543, S544, and S545. Step S541 is to sense the relative position of the lens module 130 and the fixing plate 210 by the optical sensor module 150. After the optical sensor module 150 senses the relative position of the lens module 130 and the fixing plate 210, step S542 is executed to determine whether the current position of the lens module 130 meets the predetermined position of the lens module 130. When the current position of the lens module 130 meets the predetermined position of the lens module 130, it means that the lens module 130 has no offset problem, and step S543 is executed at this time, and the optical sensor module 150 does not generate the adjustment signal S1.

[0043] When the positions of the lens module 130 and the fixing plate 210 are different from the predetermined positions of the lens module 130, it indicates that the lens module 130 has an offset problem, which will affect the image projected by the projection device 100. At this time, step S544 is executed, and the optical sensor module 150 generates an adjustment signal S1. After the optical sensor module 150 generates the adjustment signal S1, step S545 is then executed. Step S545 is to transmit the adjustment signal S1 to the control component 240 by the optical sensor module 150. After step S545 is executed, the above-mentioned steps S520 (steps S521, S522, S523, S524) and step S530 are successively executed to adjust the movement of the movable plate 220 (lens module 130) relative to the fixing plate 210. In this way, the projection device 100 can automatically adjust the position of the lens module 130 relative to the fixing plate 210 through the optical sensor module 150 to improve the convenience of use of the projection device 100.

[0044] The user can manually control the control component 240 through the input component 140, or automatically control the control component 240 through the optical sensor module 150. The control component 240 electrically controls the rotation of each driving member 231a, 231b, and 231c to adjust the movement of the movable plate 220 relative to the fixed plate 210, thereby adjusting the visual axis of the lens module 130 to improve the imaging level of the projection device 100. In addition, in other embodiments, after step S530 is executed, the optical sensor module 150 can execute step S541 again to confirm whether the lens module 130 has moved to the position.

[0045] In summary, the adjustment module of the present invention, the projection device using the same, and the control method of the projection device using the same can drive the follower to move along the rotation axis by the driving member of the adjustment unit and the first gear, so that the movable plate and the lens module disposed on the movable plate can move relative to the fixed plate along the rotation axis. In this way, the focusing effect of the lens module can be adjusted to improve the use efficiency and convenience of the adjustment module and the projection device.

[0046] The above description is only the 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 description of the present invention are still within the scope of the patent coverage 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 in the present invention. In addition, the abstract and the name of the invention 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.

[0047] Description of Reference Numerals

[0048] A: Angle

[0049] D1, D2: diameter

[0050] E1: Endpoint

[0051] E2: Center

[0052] P: Virtual plane

[0053] R1: Drive shaft

[0054] R2: Rotation axis

[0055] S: Fastener

[0056] S1: Adjust signal

[0057] S2: driving signal

[0058] S510, S520, S521, S522, S523, S524, S530, S541, S542, S543, S544, S545: Step 100: Projection device

[0059] 110: Lighting module

[0060] 120: Light valve

[0061] 130: Lens module

[0062] 132: Light emitting surface

[0063] 134: Light-entering surface

[0064] 140: Input Components

[0065] 150: Light sensor module

[0066] 200: Adjustment module

[0067] 210: Fixed plate

[0068] 212: Side 1

[0069] 213: First hole

[0070] 214: Side 2

[0071] 215: Fixings

[0072] 216: Screw hole

[0073] 217: Positioning column

[0074] 220: Activity board

[0075] 223: Second hole

[0076] 225: Mounting hole

[0077] 230a, 230b, 230c: adjustment unit

[0078] 231a, 231b, 231c: driving parts

[0079] 232: First Gear

[0080] 233: Follower

[0081] 234: Head

[0082] 235: Neck

[0083] 236: Second Gear

[0084] 237: Thread

[0085] 238: Elastic parts

[0086] 239: Transmission rod

[0087] 240: Control components

[0088] 241: Receiving unit

[0089] 242: Control unit

[0090] 243: Drive unit

[0091] 244: Wireless communication unit

[0092] 300: Illumination beam

[0093] 400: Image Beam

Claims

1. An adjustment module for adjusting the visual axis of a lens module, the adjustment module comprising a fixed plate, a movable plate and at least one adjustment unit, 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 suitable for being arranged on the movable plate, the lens module has a light emitting surface and a light incident surface, and when the lens module is arranged on the movable plate, the light emitting surface is on the same side as the first surface, and the light incident surface is on the same side as the second surface; Each of the at least one adjustment unit comprises a driving member, a first gear and a driven member, the driving member is connected to the first gear along a transmission shaft, the driving member is located between the fixed plate and the first gear, the first gear is connected to the driven member and the driven member is movably connected to the fixed plate and the movable plate along a rotating shaft, and the rotating shaft is parallel to the transmission shaft; When the driving member drives the first gear to rotate around the transmission shaft, the first gear drives the driven member to rotate around the rotation shaft, so that the movable plate moves along the rotation shaft.

2. The adjustment module according to claim 1, characterized in that: It also includes a control component, which is electrically connected to the driving component of each of the at least one adjusting unit, and the control component is suitable for driving at least one of the driving components of the at least one adjusting unit according to the adjustment signal.

3. The adjustment module according to claim 2, characterized in that: The control component includes a receiving unit, a control unit and a driving unit. The receiving unit is suitable for receiving the adjustment signal and transmitting the adjustment signal to the control unit. The control unit converts the adjustment signal into a driving signal and transmits it to the driving unit. The driving unit is suitable for driving at least one of the driving components of the at least one adjustment unit according to the driving signal.

4. The adjustment module according to claim 3, characterized in that: The driving element is a stepping motor, and the driving signal includes: Selection information of the driving member to be actuated; the rotational direction of the drive member to be actuated; and The number of rotation steps of the drive member required to be actuated.

5. The adjustment module according to claim 3, characterized in that: The receiving unit comprises a wireless communication unit, so that the receiving unit is adapted to receive the adjustment signal in a wireless manner.

6. The adjustment module according to claim 1, characterized in that: The driven member includes a connected head and a neck, the diameter of the head is larger than the diameter of the neck, the neck penetrates the movable plate and is movably connected to the fixed plate and the movable plate, and the head is correspondingly connected to the first gear.

7. The adjustment module according to claim 6, characterized in that: The head is a second gear, the first gear is meshed with the second gear, the neck includes a thread, the fixed plate is provided with a screw hole at a position corresponding to the follower, and the follower is screwed into the screw hole of the fixed plate with the thread. When the follower is driven by the first gear and rotates around the rotating shaft, the neck will change the relative position of the thread and the screw hole of the fixed plate due to the rotation, so that the follower drives the movable plate to move along the rotating shaft relative to the fixed plate.

8. The adjustment module according to claim 6, 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 respectively, so that the movable plate is located between the elastic member and the head.

9. The adjustment module according to claim 1, characterized in that: The number of the at least one adjustment unit is three.

10. A projection device, comprising an illumination module, a light valve, a lens module and an adjustment module, 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 lens module has a light emitting surface and a light incident surface; The adjustment module is used to adjust the visual axis of the lens module, and the adjustment module includes a fixed plate, a movable plate and at least one adjustment unit. 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 arranged on the movable plate, the light emitting surface is on the same side as the first surface, and the light incident surface is on the same side as the second surface; Each of the at least one adjustment unit comprises a driving member, a first gear and a driven member, the driving member is connected to the first gear along a transmission shaft, the driving member is located between the fixed plate and the first gear, the first gear is connected to the driven member and the driven member is movably connected to the fixed plate and the movable plate along a rotating shaft, and the rotating shaft is parallel to the transmission shaft; When the driving member drives the first gear to rotate around the transmission shaft, the first gear drives the driven member to rotate around the rotation shaft, so that the movable plate moves along the rotation shaft.

11. The projection device according to claim 10, characterized in that: The adjustment module further includes a control component electrically connected to the driving component of each of the at least one adjustment units, and the control component is suitable for driving at least one of the driving components of the at least one adjustment unit according to an adjustment signal.

12. The projection device according to claim 11, characterized in that: The control component includes a receiving unit, a control unit and a driving unit. The receiving unit is suitable for receiving the adjustment signal and transmitting the adjustment signal to the control unit. The control unit converts the adjustment signal into the driving signal and transmits it to the driving unit. The driving unit is suitable for driving at least one of the driving members of the at least one adjustment unit according to the driving signal.

13. The projection device according to claim 12, characterized in that: The driving element is a stepping motor, and the driving signal includes: Selection information of the driving member to be actuated; the rotational direction of the drive member to be actuated; and The number of rotation steps of the drive member required to be actuated. 14 . The projection device as claimed in claim 11 , further comprising an input component, wherein the input component is adapted to generate the adjustment signal, and the input component is communicatively connected to the control component to transmit the adjustment signal to the control component.

15. The projection device as described in claim 11 further includes a light sensor module, wherein the light sensor module is used to sense the relative position of the lens module and the fixing plate and generate the adjustment signal, and the light sensor module is electrically connected to the control component to transmit the adjustment signal to the control component.

16. The projection device according to claim 10, characterized in that: The follower includes a connected head and a neck, the diameter of the head is larger than the diameter of the neck, the neck passes through the movable plate and is movably connected to the fixed plate and the movable plate, the head is a second gear, the first gear is meshed with the second gear, the neck includes a thread, 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 first gear and rotates around the rotating shaft, the neck will change the relative position of the thread and the screw hole of the fixed plate due to the rotation, so that the follower drives the movable plate to move along the rotating shaft relative to the fixed plate.

17. The projection device as described in claim 16, each of the at least one adjustment units further includes an elastic member, the elastic member is sleeved on the neck of the follower, and when the neck passes through the movable plate, the elastic member respectively abuts against the movable plate and the fixed plate, so that the movable plate is located between the elastic member and the head.

18. The projection device according to claim 10, characterized in that: The number of the at least one adjustment unit is three.

19. A control method for a projection device, the projection device comprising a lens module and an adjustment module, the adjustment module comprising a fixed plate, a movable plate, at least one adjustment unit and a control assembly, the lens module is arranged on the movable plate, the movable plate is movably connected to the fixed plate, the control assembly is electrically connected to the at least one adjustment unit, each of the at least one adjustment unit comprises a driving member, a first gear and a driven member, the driving member is connected to the first gear, the first gear is connected to the driven member and the driven member is movably connected to the fixed plate and the movable plate along a rotating shaft, characterized in that: The control method comprises the following steps: receiving an adjustment signal by the control component and converting the adjustment signal into a driving signal; and The control component drives at least one of the driving members in the adjustment module according to the driving signal, so that at least one of the corresponding first gears rotates, and drives at least one of the corresponding follower members to rotate, so that the movable plate and the lens module move along the rotating shaft relative to the fixed plate to adjust the visual axis of the lens module.

20. The control method of the projection device according to claim 19, characterized in that: The projection device further includes a light sensor module, and the control method further includes the following steps: The optical sensor module senses the relative position between the lens module and the fixing plate and generates the adjustment signal. The adjustment signal is transmitted to the control component via the optical sensor module.

21. The control method of the projection device according to claim 19, characterized in that: The driving element is a stepping motor, and the driving signal includes: Selection information of the driving member to be actuated; the rotational direction of the drive member to be actuated; and The number of rotation steps of the drive member required to be actuated.

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