Projection equipment and projection system

Abstract

This application discloses a projection device and projection system, belonging to the field of projection technology. The application provides a projection device including: a projection lens, an adjustment component, a connector, an optical engine assembly, and at least one compensation lens. When it is necessary to adjust and compensate for optical path deviations in the projection device, the adjustment component can be controlled to rotate the connector, causing the connector to move at least one compensation lens along a direction parallel to the optical axis of the lens barrel. This adjusts the horizontal distance between the compensation lens and the lens installed inside the lens barrel, thereby achieving adjustment and compensation for optical path deviations in the projection device. This application can adjust and compensate for optical path deviations in the projection device using only the adjustment component and the connector. Furthermore, the length of the connector in this application is less than half the length of connectors in related technologies, ensuring a smaller projection lens size and consequently a smaller projection device size.

Description

Technical Field

[0001] This application relates to the field of projection technology, and in particular to a projection device and projection system. Background Technology

[0002] With the development of optoelectronic technology, the requirements for the projected image of projection equipment are becoming increasingly stringent. Projection equipment mainly consists of a housing, and within that housing, a light source assembly, an optical engine assembly, and a lens. The light source assembly provides a laser beam to the optical engine assembly, which modulates the laser beam provided by the light source assembly. The lens projects the image based on the modulated laser beam from the optical engine assembly.

[0003] The light source assembly, optical engine assembly, and lens within the housing typically include multiple optical components (e.g., lenses). Through the interaction of these optical components, the projection device can project an image. Since each optical component has manufacturing errors, and assembly errors also exist during the assembly of the optical components within the housing, a compensation lens and an adjustment mechanism for moving the compensation lens back and forth are needed to correct and compensate for these manufacturing errors.

[0004] However, current adjustment mechanisms involve multiple structures, and only through the cooperation of these structures can the compensation lens be moved back and forth along its optical axis. When there are many structures in the adjustment mechanism, it results in a larger projection device. Summary of the Invention

[0005] This application provides a projection device and projection system. It solves the problem that the projection device becomes bulky due to the numerous structures incorporated in the existing adjustment mechanism. The technical solution is as follows:

[0006] On the one hand, a projection device is provided, including: a projection lens, an adjustment component, a connector, an optical engine assembly, and at least one compensation lens;

[0007] The projection lens includes: a lens barrel and an optical lens located inside the lens barrel, the lens barrel being connected to the optomechanical assembly, and the optical lens being coaxially arranged with the compensation lens;

[0008] The adjusting component is located outside the lens barrel and is movably connected to the lens barrel;

[0009] The connector is movably connected to the adjusting member, and a portion of the connector is sleeved on the lens barrel and used to install the at least one compensating lens.

[0010] The adjusting member is configured to rotate about the optical axis of the lens barrel, thereby driving the connecting member to rotate about the optical axis while moving in a direction parallel to the optical axis, so that the connecting member can drive the at least one lens to move in a direction parallel to the optical axis.

[0011] On the other hand, a projection system is provided, including a projection screen and the aforementioned projection device.

[0012] The beneficial effects of the technical solutions provided in this application include at least the following:

[0013] A projection device includes a projection lens, an adjustment component, a connector, an optical engine assembly, and at least one compensation lens. When it is necessary to adjust and compensate for optical path deviations in the projection device, the connector can be rotated by controlling the adjustment component, causing it to move along a direction parallel to the optical axis of the lens barrel. This allows the connector to move at least one compensation lens along the same direction. This adjusts the horizontal distance between the compensation lens and the lens installed inside the lens barrel, thereby adjusting and compensating for optical path deviations in the projection device, resulting in better display quality of the projected image. Furthermore, this application only requires the cooperation of the adjustment component and the connector to adjust and compensate for optical path deviations in the projection device. Since the adjustment component is located outside the lens barrel, there is no need to increase the length of the projection lens to accommodate it. This allows for full utilization of the space within the projection device. The length of the connector can be less than half the length of connectors in related technologies, ensuring a shorter projection lens and a smaller lens size, thus resulting in a smaller projection device size. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a projection device provided in an embodiment of this application;

[0016] Figure 2 This is a schematic diagram illustrating the cooperation of an adjusting member, a connecting member, and a lens barrel according to an embodiment of this application;

[0017] Figure 3 This is a schematic diagram illustrating the cooperation between an adjusting member and a connecting member according to an embodiment of this application;

[0018] Figure 4 yes Figure 3 An exploded view of the regulating mechanism is shown.

[0019] Figure 5 This is a schematic diagram of another projection device provided in an embodiment of this application;

[0020] Figure 6 This is a side view of a connecting ring provided in an embodiment of this application;

[0021] Figure 7 This is a schematic diagram of the structure of a guide component provided in an embodiment of this application;

[0022] Figure 8 This is a schematic diagram of a transmission rod and a connecting ring cooperating according to an embodiment of this application;

[0023] Figure 9 This is a cross-sectional view of a connector provided in an embodiment of this application;

[0024] Figure 10 This is a schematic diagram of the cooperation between a transmission rod and an adjusting component provided in an embodiment of this application;

[0025] Figure 11 This is a schematic diagram of a guide post and a strip hole provided in an embodiment of this application;

[0026] Figure 12 This is a schematic diagram illustrating the connection relationship between an adjusting member and a lens barrel according to an embodiment of this application;

[0027] Figure 13 This is a schematic diagram of the structure of another projection device provided in the embodiments of this application;

[0028] Figure 14 This is a schematic diagram of a projection system provided in an embodiment of this application. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0030] In related technologies, projection devices may include a projection lens, a light source assembly, and an optical engine assembly. The light source assembly provides a laser beam to the optical engine assembly, which modulates the laser beam provided by the light source assembly. The lens projects an image based on the modulated laser beam. The light source assembly, optical engine assembly, and lens in a projection lens typically include multiple optical components (e.g., lenses). Through the cooperation of these multiple optical components, the projection device can project an image.

[0031] A projection lens may include: a lens barrel, multiple optical lenses and a compensation lens located within the lens barrel, and an adjustment mechanism for moving the compensation lens back and forth. The optical lenses further modulate the laser beam provided by the optomechanical components, resulting in a higher quality laser beam for projection. The compensation lens corrects and compensates for manufacturing errors in various optical components. The adjustment mechanism needs to include multiple structures such as adjustment components, connecting components, and limiting components. The cooperation of these structures is necessary to move the compensation lens back and forth along its optical axis. However, a large number of structures in the adjustment mechanism can lead to a larger projection device size.

[0032] In the embodiments of this application, please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a projection device provided in an embodiment of this application. The projection device 000 may include: a projection lens 100, a lens barrel 101, an adjustment component 200, a connector 300, an optical engine assembly (not shown in the figure), and at least one compensation lens 400.

[0033] The projection lens 100 in the projection device 000 may include a lens barrel 101 and optical lenses located within the lens barrel. The lens barrel 101 may be connected to an optical engine assembly, and the optical lenses within the lens barrel 101 may be coaxially arranged with the compensation lens 400. Therefore, when the lens barrel 101 and the compensation lens 400 are coaxially arranged, the optical axes of each lens installed within the lens barrel 101 coincide with the optical axis of the compensation lens 400.

[0034] Here, the projection device 000 may also include a light source assembly. The light source assembly can be used to provide a laser beam to the optical engine assembly, the optical engine assembly can be used to modulate the laser beam provided by the light source assembly, and guide the modulated laser beam to the projection lens 100, the projection lens 100 can be used to project an image based on the laser beam modulated by the optical engine assembly.

[0035] To more clearly see the fit between the adjusting member 200, the connecting member 300, and the lens barrel 101, please refer to... Figure 2 , Figure 2 This is a schematic diagram illustrating the cooperation of an adjusting member, a connecting member, and a lens barrel according to an embodiment of this application.

[0036] The adjustment element 200 in the projection device 000 can be located outside the lens barrel 101 and can be movably connected to the lens barrel 101.

[0037] The connector 300 in the projection device 000 can be movably connected to the adjustment member 200. A portion of the connector 300 can be fitted onto the lens 100 and used to mount at least one compensation lens 400. It should be noted that the portion of the connector 300 not fitted onto the lens barrel 101 can be used to mount at least one compensation lens 400. Here, since a portion of the connector 300 is fitted onto the lens barrel 101, and the two are not fixed together, the connector 300 can move relative to the lens barrel 101 without affecting the position of the optical lenses within the lens barrel 101.

[0038] The adjusting member 200 in the projection device 000 can be configured to rotate about the optical axis G of the lens barrel 101, thereby driving the connecting member 300 to rotate about the optical axis G of the lens barrel 101 while moving in a direction parallel to the optical axis G of the lens barrel 101, so that the connecting member 300 can drive at least one compensating lens 400 to move in a direction parallel to the optical axis G of the lens barrel 101.

[0039] In this embodiment, by rotating the connecting member 300 via the adjusting member 200, the connecting member 300 can move along the optical axis G parallel to the lens barrel 101. This allows the connecting member 300 to move at least one compensating lens 400 along the optical axis G parallel to the lens barrel 101. This adjusts the horizontal distance between the compensating lens 400 and the lenses installed inside the lens barrel 101, thereby adjusting and compensating for any deviations in the optical path within the projection device 000, resulting in a better display effect for the projected image.

[0040] It should be noted that since the compensation lens 400 is mounted on the connector 300, the compensation lens 400 also rotates around the optical axis G along with the connector 300. Furthermore, since the compensation lens 400 and the optical lens inside the lens barrel 101 are coaxially arranged, the rotation of the compensation lens 400 around the optical axis G will not affect the compensation lens 400's effect on adjusting and compensating for any deviations in the optical path within the projection device 000.

[0041] In related technologies, since the rotation of the compensation lens needs to be restricted by limiting components, the adjustment components and connecting components in the adjustment mechanism are relatively large in order to enable the compensation lens to move back and forth well, resulting in a large projection device.

[0042] In this application, the position of the compensation lens 400 can be adjusted by the cooperation of only two components: the adjusting component 200 and the connecting component 300. This allows the compensation lens 400 to adjust and compensate for any deviations in the optical path within the projection device 000. Furthermore, since both the adjusting component 200 and the connecting component 300 are relatively small, the projection device 000 using these components for optical path adjustment and compensation can be kept compact.

[0043] For example, since the adjusting member 200 in this application is located outside the lens barrel, there is no need to increase the length of the projection device 000 to accommodate the adjusting member 200. This allows for full utilization of the space within the projection device 000. Furthermore, the length of the connector 300 can be less than half the length of the connector in the adjusting mechanism of related technologies, ensuring a shorter length of the projection lens 100 and consequently a smaller size of the projection device 000. Since the connector 300 can also be used to mount the compensation lens 400, the length of the projection lens can be further shortened using the connector 300.

[0044] For example, in related technologies, the length of the connector can be 31.5 mm, while the length of the connector 300 in this application can be 12 mm. Thus, considering only the adjustment mechanism, the adjustment member 200 and connector 300 used in this application can shorten the length of the projection lens by more than 19.5 mm. Since the connector 300 can also be used to install the compensation lens 400, the length of the projection device 000 can be shortened by at least 20 mm in terms of the overall length of the projection lens after replacing the adjustment mechanism in the related technologies with the adjustment member 200 and connector 300 of this application.

[0045] It should be noted that when adjusting and compensating for optical path deviations in the projection device 000, the operator can control the adjusting component 200 to rotate around the optical axis G of the lens barrel 101. This allows the adjusting component 200 to rotate around the optical axis G of the lens barrel 101 while simultaneously moving in a direction parallel to the optical axis G, enabling the connecting component 300 to move the compensating lens 400 in a direction parallel to the optical axis G. Thus, by rotating the adjusting component 200 around the optical axis G of the lens barrel 101, the optical path deviations in the projection device 000 can be adjusted and compensated. After adjusting the optical path of the projection device 000, the operator can also fix the adjusting component 200 to the lens barrel 101 of the projection lens 100, ensuring that the adjusting component 200 is stably held in a position that allows for good adjustment of the optical path of the projection device 000, thereby guaranteeing a good display effect of the projected image.

[0046] In summary, this application provides a projection device, including: a projection lens, an adjustment component, a connector, an optical engine assembly, and at least one compensation lens. When it is necessary to adjust and compensate for optical path deviations in the projection device, the connector can be rotated by controlling the adjustment component, causing it to move along a direction parallel to the optical axis of the lens barrel. This allows the connector to move at least one compensation lens along the same direction. This adjusts the horizontal distance between the compensation lens and the lens installed inside the lens barrel, thereby adjusting and compensating for optical path deviations in the projection device, resulting in better display quality of the projected image. Furthermore, this application only requires the cooperation of the adjustment component and the connector to adjust and compensate for optical path deviations in the projection device. Since the adjustment component is located outside the lens barrel, there is no need to increase the length of the projection lens to accommodate it. This allows for full utilization of the space within the projection device. The length of the connector can be less than half the length of connectors in related technologies, ensuring a shorter projection lens and a smaller overall size, thus making the projection device smaller in size.

[0047] In the embodiments of this application, please refer to Figure 3 , Figure 3 This is a schematic diagram illustrating the cooperation between an adjusting member and a connecting member according to an embodiment of this application. The connecting member 300 in the projection device 000 may include: a transmission rod 301 and a connecting ring 302.

[0048] To more clearly see the connection relationship between the adjusting component 200, the transmission rod 301, and the connecting ring 302 in the projection device 000, please refer to... Figure 4 , Figure 4 yes Figure 3 The exploded view of the adjustment mechanism is shown. One end of the transmission rod 301 in the connector 300 can be movably connected to the adjustment member 200 in the projection device 000, and the other end of the transmission rod 301 can be fixedly connected to the connecting ring 302 in the connector 300. Thus, when the adjustment member 200 rotates around the optical axis G of the lens barrel 101, the adjustment member 200 can drive the transmission rod 301 to rotate synchronously around the optical axis G of the lens barrel 101, thereby causing the transmission rod 301 to drive the connecting ring 302 to rotate synchronously.

[0049] In this application, a portion of the connecting ring 302 in the connector 300 can be sleeved on the lens barrel 101 in the projection device 000, and another portion of the connecting ring 302 can be located outside the lens barrel 101 and can be used to install at least one compensation lens 400. That is, the portion of the connecting ring 302 not sleeved on the lens barrel 101 can be used to install at least one compensation lens 400.

[0050] For example, the portion of the connecting ring 302 located outside the lens barrel 101 may have a mounting groove Z corresponding to the compensating lens 400, and at least one compensating lens 400 can be assembled into the corresponding mounting groove Z in the connecting ring 302. Thus, when the optical axis G of the lens barrel 101 rotates under the drive of the transmission rod 301, the connecting ring 302 can drive the compensating lens 400 to rotate around the optical axis G. In this way, the adjusting member 200 can drive the compensating lens 400 to rotate around the optical axis G through the transmission rod 301 and the connecting ring 302 in the connecting member 300.

[0051] It should be noted that when the compensation lens 400 rotates only around the optical axis G, it cannot adjust and compensate for optical path deviations. Therefore, it is also necessary to enable the compensation lens 400 to move in a direction parallel to the optical axis G under the action of the adjusting member 200. Please refer to [reference needed] in this application. Figure 4 and Figure 5 , Figure 5 This is a schematic diagram of another projection device provided in an embodiment of this application. The portion of the connecting ring 302 sleeved on the lens barrel may have a guide groove S. The outer wall of the lens barrel 101 has a guide member C, at least a portion of which may be located within the guide groove S. The guide member C may be configured to slide within the guide groove S during the rotation of the connecting ring 302 around the optical axis G of the lens barrel 101, thereby causing the connecting ring 302 to move in a direction parallel to the optical axis G.

[0052] For example, when it is necessary to adjust and compensate for the optical path deviation in the projection device 000, the operator can control the adjusting component 200 to rotate around the optical axis G of the lens barrel 101. The adjusting component 200 can drive the transmission rod 301 in the connecting component 300 to rotate around the optical axis G of the lens barrel 101, so that the transmission rod 301 can drive the connecting ring 302 to rotate around the optical axis G of the lens barrel 101. During the rotation of the connecting ring 302 around the optical axis G of the lens barrel 101, the guide component C can drive the connecting ring 302 to move in a direction parallel to the optical axis G, so that the connecting ring 302 can move in a direction parallel to the optical axis G. In this way, the connecting ring 302 can drive the compensation lens 400 to move in a direction parallel to the optical axis G. Thus, the adjusting component 200 can drive the compensation lens 400 to move in a direction parallel to the optical axis G through the transmission rod 301 and the connecting ring 302 in the connecting component 300.

[0053] Here, the operator can control the adjustment component 200 to rotate around the optical axis G of the lens barrel 101 in several possible ways:

[0054] In one possible implementation, the operator can manually control the adjustment component 200 to rotate around the optical axis G of the lens barrel 101;

[0055] In another possible implementation, the side of the adjusting member 200 facing away from the connecting member 300 can be a gear structure. The projection device can have a drive gear and a drive motor that cooperate with this gear structure. The drive gear can mesh with the gear structure on the adjusting member 200, and the drive motor can drive the drive gear to rotate. In this way, when it is necessary to control the adjustment member 200 to rotate around the optical axis G of the lens barrel 101, the operator can start the drive motor, which drives the drive gear to rotate, thereby enabling the drive gear to drive the adjusting member around the optical axis G of the lens barrel 101. In this case, the operating space of the adjusting member 200 does not need to be considered. This allows the position of the adjusting member 200 in the projection device 000 to be more flexible, and in the design and production of the projection lens 100, it is not necessary to pre-set the installation position of the adjusting member 200 on the lens barrel 101 of the projection lens 100, which can further reduce the size of the projection lens 100, thereby reducing the size of the projection device 000.

[0056] In this application, as Figure 3 and Figure 6 As shown, Figure 6 This is a side view of a connecting ring provided in an embodiment of this application. The extension direction X of the guide groove S in the connecting ring 302 can intersect with the circumferential direction R of the connecting ring 302. Here, the connecting ring 302 is usually a circular ring structure. When the extension direction X of the guide groove S intersects with the circumferential direction R of the connecting ring 302, the guide groove S on the connecting ring 302 is a curved guide groove. Since the position of the guide member C on the lens barrel 101 is fixed, when the connecting ring 302 rotates around the optical axis G of the lens barrel 101, the guide member C can slide relative to the connecting ring 302 within the guide groove S. In this way, under the interaction of the guide member C and the guide groove S, the connecting ring 302 can rotate around the optical axis G of the lens barrel 101 while moving in a direction parallel to the optical axis G of the lens barrel 101.

[0057] For example, when the operator controls the adjusting member 200 to rotate around the optical axis G of the lens barrel 101, the adjusting member 200 can drive the transmission rod 301 to rotate around the optical axis G of the lens barrel 101. This causes the transmission rod 301 to apply a driving force to the connecting ring 302. Under the action of this driving force, the connecting ring 302 can tend to rotate around the optical axis G of the lens barrel 101. Under the constraint of the guide member C, the tendency of the connecting ring 302 to rotate around the optical axis G of the lens barrel 101 can be guided to move along the extension direction of the guide groove S. In this way, the guide member C allows the connecting ring 302 to move in a direction parallel to the optical axis G of the lens barrel 101 while rotating around the optical axis G of the lens barrel 101.

[0058] It should be noted that, as Figure 4 and Figure 5As shown, there can be multiple adjusting grooves S and multiple guide members C. Each guide member C can correspond one-to-one with a single adjusting groove S, and at least a portion of each guide member C can be located within its corresponding adjusting groove S. Thus, through the mutual cooperation of multiple guide members C and multiple adjusting grooves S, the connecting ring 302 can move more stably along the optical axis G of the lens barrel 101 during its rotation around the optical axis G of the lens barrel 101.

[0059] Optional, please refer to Figure 7 , Figure 7 This is a schematic diagram of a guide component provided in an embodiment of this application. The guide component C can be a roller fixedly connected to the lens barrel 101, and the roller can contact the inner wall of the guide groove S. When the guide component C is a roller, the friction between the guide component C and the inner wall of the guide groove S is small. That is, during the relative movement of the connecting member 300 and the guide component C driven by the transmission rod 301, the resistance from the guide component C is small. Thus, the operator only needs to apply a small force to the adjusting member 200 to make the adjusting member 200 drive the transmission rod 301 to rotate around the optical axis G of the lens barrel 101, and the rotating rod can drive the connecting member 300 to rotate around the optical axis G of the lens barrel 101 while moving in a direction parallel to the optical axis G of the lens barrel 101. Furthermore, since the roller can contact the inner wall of the guide rail S, when the connecting ring 302 tends to rotate around the optical axis G of the lens barrel 101, the guide member C can better constrain the connecting ring 302, thus reducing the rotation distance required for the adjusting member 200 to move the connecting ring 302 along the extension direction of the guide rail. This improves the efficiency of the operator in adjusting and compensating for deviations in the optical path of the projection device 000 using the adjusting member 200.

[0060] In the embodiments of this application, please refer to Figure 8 , Figure 8 This is a schematic diagram of a transmission rod and a connecting ring according to an embodiment of this application. The other end of the transmission rod 301, which is not connected to the adjusting member 200, may have two limiting protrusions K and a through hole T1 located between the two limiting protrusions K.

[0061] At least a portion of the connecting ring 302 may be located between the two limiting protrusions K, and the connecting ring 302 may have a fastening hole T2 communicating with the through hole T1 between the two limiting protrusions K.

[0062] In this way, when the connector 300 needs to be installed in the projection device 000, the two limiting protrusions K of the transmission rod 301 can more quickly align the transmission rod 301 with the connector 300, and the fastening hole T2 on the connecting ring 302, which communicates with the through hole T1 of the transmission rod 301, can more accurately determine the relative position of the transmission rod 301 and the connector 300. This further improves the assembly efficiency of the connector 300, and consequently improves the assembly efficiency of the projection device 000.

[0063] Optional, such as Figure 9 As shown, Figure 9 This is a cross-sectional view of a connector provided in an embodiment of this application. The transmission rod 301 in the connector 300 may have at least one engaging protrusion M at a position adjacent to the limiting protrusion K, and the connecting ring 302 may have an engaging groove N corresponding to the engaging protrusion M. In this case, before assembling the transmission rod 301 and the connecting ring 302, the operator can determine the relative position of the transmission rod 301 and the connecting ring 302 by observing the relative positional relationship between the engaging protrusion M on the transmission rod 301 and the engaging groove N on the connecting ring 302. This allows for more efficient and stable alignment of the through hole T1 of the transmission rod 301 with the fastening hole T2 of the connecting ring 302. This not only ensures the accuracy of the connector 300 assembly but also further improves the assembly efficiency of the connector 300.

[0064] In this application, as Figure 8 As shown, the connector 300 may further include a fastener 303 that passes through the through hole T1 of the transmission rod 301 and connects to the fastening hole T2 of the connector 300. The fastener 303 securely connects the transmission rod 301 to the connecting ring 302. In this way, the transmission rod 301 can more stably drive the connecting ring 302 to rotate around the optical axis G of the lens barrel 101 and move in a direction parallel to the optical axis G of the lens barrel 101, while the connecting ring 302 can also drive the transmission rod 301 to move in a direction parallel to the optical axis G of the lens barrel 101.

[0065] In the embodiments of this application, please refer to Figure 10 , Figure 10 This is a schematic diagram illustrating the cooperation between a transmission rod and an adjusting member according to an embodiment of this application. One end of the transmission rod 301 may have a slotted hole O, and the adjusting member 200 may have a guide post 200a on the side facing the transmission rod 301, with the guide post 200a located within the slotted hole O of the transmission rod 301. The length direction of the slotted hole O may be parallel to the optical axis G of the lens barrel 101. Thus, through the cooperation of the guide post 200a and the slotted hole O, when the adjusting member 200 rotates around the optical axis G of the lens barrel 101, the adjusting member 200 can drive the transmission rod 301 to rotate around the optical axis G of the lens barrel 101.

[0066] To more clearly see the positional relationship between the guide post and the slot, please refer to... Figure 11 , Figure 11 This is a schematic diagram of a guide post and a slotted hole provided in an embodiment of this application. When the adjusting member 200 rotates around the optical axis G of the lens barrel 101, since the guide rod of the adjusting member 200 is located inside the slotted hole O of the transmission rod 301, the adjusting member 200 can apply a driving force to the inner wall of the slotted hole O through the guide post 200a. Under the drive of this driving force, the transmission rod 301 can rotate around the optical axis G of the lens barrel 101.

[0067] It should be noted that the transmission rod 301 and the connecting ring 302 are fixedly connected. When the connecting ring 302 moves along the optical axis G parallel to the lens barrel 101, the connecting ring 302 can drive the transmission rod 301 to move along the same direction. During the movement of the transmission rod 301 along the optical axis G, the guide post 200a in the adjusting member 200 can move within the slotted hole O of the transmission rod 301, relative to the transmission rod 301 along the length direction of the slotted hole O. Since the length direction of the slotted hole O can be parallel to the optical axis G, the length of the slotted hole O is also the range within which the transmission rod 301 and the connecting ring 302 can move along the direction parallel to the optical axis G.

[0068] For example, when the guide post 200a in the adjusting member 200 is in its extreme position within the slot O, that is, when the guide post 200a abuts against the inner wall of the slot O along its length, the adjusting member 200 will be unable to rotate due to the resistance from the transmission rod 301. Thus, by cooperating with the slot O, the rotation range of the adjusting member 200 can be controlled, thereby ensuring that the position of the compensating lens 400 along the optical axis G is adjustable within a certain range. This avoids the undesirable situation where the deviation in the optical path of the projection device 000 is difficult to correct and compensate due to an excessively large adjustment range, thus improving the adjustment efficiency of the deviation in the optical path of the projection device 000.

[0069] In the embodiments of this application, please refer to Figure 12 , Figure 12This is a schematic diagram illustrating the connection relationship between an adjusting member and a lens barrel according to an embodiment of this application. The adjusting member 200 in the projection device 000 may have a limiting groove D. The projection device 000 may also include a limiting member 500 connected to the outer wall of the lens barrel 101, with at least a portion of the limiting member 500 located within the limiting groove D. Thus, the adjusting member 200 can be movably connected to the lens barrel 101 via the limiting member 500, allowing the adjusting member 200 to move relative to the lens barrel 101 within the dimensional range of the limiting groove D. This allows for more precise control of the adjusting member 200's rotation around the optical axis G of the lens barrel 101 within this range when the operator controls it to rotate.

[0070] For example, the extension direction of the limiting slide D can be parallel to the circumferential direction of the connecting ring 302. Thus, the adjusting member 200 moves relative to the lens barrel 101 within the dimensional range of the limiting slide D, that is, it rotates along the circumferential direction of the connecting ring 302. Furthermore, since the central axis of the circumferential direction of the connecting ring 302 coincides with the optical axis G of the lens barrel 101, the operator can more precisely control the rotation of the adjusting member 200 around the optical axis G of the lens barrel 101 through the cooperation of the limiting slide D and the limiting member 500.

[0071] Optionally, the outer wall of the lens barrel 101 may have a threaded hole communicating with the limiting groove D, and the limiting member 500 in the projection device 000 may be a screw that passes through the limiting groove D of the adjusting member 200 and is threadedly connected to the threaded hole. In this way, the operator can control the degree of limiting of the limiting member 500 to the adjusting member 200 by controlling the degree of engagement of the limiting member 500 in the threaded hole.

[0072] For example, when a significant adjustment to the optical path of the projection device 000 is required, the operator can reduce the engagement of the limiting member 500 with the threaded hole. The limiting member 500 only limits the adjusting member 200 via the screw, allowing the operator to apply a small force to control the adjustment member 200 to rotate around the optical axis G of the lens barrel 101. This improves the efficiency of adjusting the optical path of the projection device 000. After adjustment, the operator can further engage the limiting member 500 with the threaded hole, allowing the limiting member 500 to apply a clamping force to the adjusting member 200. Under this clamping force, the adjusting member 200 can be more securely connected to the lens barrel 101, preventing adverse situations where the adjusting member 200 shifts due to external environmental interference, thus altering the optical path in the projection device 000.

[0073] In the embodiments of this application, please refer to Figure 13 , Figure 13This is a schematic diagram of another projection device provided in this application embodiment. The lens barrel 101 in the projection lens 100 may include: a lens barrel body 102, and a connecting flange 103 fixedly connected to the lens barrel body. One side of the connecting flange 103 in the projection lens 100 has an arc-shaped support platform 103a, and the adjusting member 200 can be located on the arc-shaped support platform 103a. Here, the arc-shaped support platform 103a can provide support and guidance for the adjusting member 200. The extension direction of the position where the arc-shaped support platform 103a contacts the adjusting member 200 can be consistent with the extension direction of the adjusting slide. When it is necessary to adjust the optical path of the projection device 000, the operator only needs to control the adjusting member 200 to rotate along the extension direction of the arc-shaped support platform 103a.

[0074] In this application, as Figure 12 As shown, at least a portion of the connector 300 in the projection device 000 can be located on the side of the connecting flange 103 opposite to the arcuate support platform 103a. For example, the arcuate support platform 103a of the connecting flange 103 can have a first through groove, and the guide post 200a of the adjusting member 200 can be located within the first through groove of the connecting flange 103. The side of the connecting flange 103 opposite to the arcuate support platform 103a has a second through groove communicating with it, and the portion of the transmission rod 301 in the connector 300 with the strip-shaped hole O can be located within the second through groove. Thus, the end of the guide post 200a in the adjusting member 200 can pass through the first through groove and be movably connected to the transmission rod 301 within the second through groove.

[0075] It should be noted that the connecting flange 103 can be used to fix the optical engine housing in the projection device. For example, the side of the connecting flange 103 facing away from the curved support platform 103a can be fixedly connected to the optical engine housing. Since the light-emitting side of the compensation lens 400 can face away from the curved support platform 103a, the light-emitting side of the compensation lens 400 can face the light-transmitting aperture of the optical engine. Thus, during the assembly of the laser projection device, the operator positions the projection lens 100 and the optical engine using the connecting flange 103, allowing for efficient installation of the projection lens 100 and the optical engine, thereby improving the assembly efficiency of the laser projection device.

[0076] In summary, this application provides a projection device, including: a projection lens, an adjustment component, a connector, an optical engine assembly, and at least one compensation lens. When it is necessary to adjust and compensate for optical path deviations in the projection device, the connector can be rotated by controlling the adjustment component, causing it to move along a direction parallel to the optical axis of the lens barrel. This allows the connector to move at least one compensation lens along the same direction. This adjusts the horizontal distance between the compensation lens and the lens installed inside the lens barrel, thereby adjusting and compensating for optical path deviations in the projection device, resulting in better display quality of the projected image. Furthermore, this application only requires the cooperation of the adjustment component and the connector to adjust and compensate for optical path deviations in the projection device. Since the adjustment component is located outside the lens barrel, there is no need to increase the length of the projection lens to accommodate it. This allows for full utilization of the space within the projection device. The length of the connector can be less than half the length of connectors in related technologies, ensuring a shorter projection lens and a smaller overall size, thus making the projection device smaller in size.

[0077] This application also provides a projection system, please refer to... Figure 14 , Figure 14 This is a schematic diagram of a projection system provided in an embodiment of this application. The projection system 001 may include a projection screen 002 and a projection device 000. The projection device 000 is used to image a beam of light and then project it onto the projection screen 002. Here, the projection device can be the projection device 000 in the above embodiment. For example, this projection device can be... Figure 1 , Figure 5 or Figure 13 The projection device shown is 000.

[0078] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0079] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A projection device, characterized in that, include: Projection lens, adjustment mechanism, connector, optical engine assembly, and at least one compensation lens; The projection lens includes: a lens barrel and an optical lens located inside the lens barrel. The lens barrel is connected to the optomechanical assembly, and the optical lens is coaxially arranged with the compensation lens. The lens barrel includes: a lens barrel body and a connecting flange fixedly connected to the lens barrel body. One side of the connecting flange has an arc-shaped support platform. The connecting flange is used for fixed connection with the housing of the optical engine. The adjusting member is located outside the lens barrel and is movably connected to the lens barrel; the adjusting member is located on the arc-shaped support platform; At least a portion of the connector is located on the side of the connecting flange away from the arc-shaped support platform; the connector includes: a transmission rod and a connecting ring; one end of the transmission rod is movably connected to the adjusting member, and the other end of the transmission rod is fixedly connected to the connecting ring; a portion of the connecting ring is sleeved on the lens barrel and has a guide groove, and another portion of the connecting ring is located outside the lens barrel and is used to install the at least one compensating lens; a guide is provided on the outer wall of the lens barrel, and at least a portion of the guide is located within the guide groove; The adjusting member is configured to rotate around the optical axis of the lens barrel, thereby driving the connecting member to rotate around the optical axis while moving in a direction parallel to the optical axis, so that the connecting member can drive the at least one lens to move in a direction parallel to the optical axis; the guide member is configured to slide in the guide groove during the rotation of the connecting member around the optical axis, thereby driving the connecting ring to move in a direction parallel to the optical axis.

2. The projection device according to claim 1, characterized in that, The extension direction of the guide groove intersects with the circumferential direction of the connecting ring.

3. The projection device according to claim 1, characterized in that, The guide component is a roller fixedly connected to the lens barrel, and the roller is in contact with the inner wall of the guide groove.

4. The projection device according to any one of claims 1 to 3, characterized in that, One end of the transmission rod has a strip-shaped hole, and the adjusting member has a guide post on the side facing the transmission rod, with the end of the guide post located inside the strip-shaped hole; The length direction of the strip-shaped aperture is parallel to the optical axis.

5. The projection device according to any one of claims 1 to 3, characterized in that, The other end of the transmission rod has two limiting protrusions and a through hole located between the two limiting protrusions; The portion of the connecting ring is located between the two limiting protrusions, and the connecting ring has a fastening hole communicating with the through hole; The connector further includes a fastener that passes through the through hole and connects to the fastening hole.

6. The projection device according to any one of claims 1 to 3, characterized in that, The adjusting member has a limiting groove, and the projection lens further includes a limiting member connected to the outer wall of the lens barrel, at least a portion of which is located within the limiting groove.

7. The projection device according to claim 6, characterized in that, The outer wall of the lens barrel has a threaded hole that communicates with the limiting groove, and the limiting member is a screw that passes through the limiting groove and is threadedly connected to the threaded hole.

8. A projection system, characterized in that, include: The projection screen and the projection device according to any one of claims 1 to 7.

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