Laser projection television

Abstract

The application relates to a laser projection television. The laser projection television comprises a carrier plate, a laser projection main machine arranged on the carrier plate, a telescopic driving mechanism arranged on the carrier plate and used for driving the laser projection main machine to move relative to the carrier plate, so that the projection of the laser projection main machine on the carrier plate falls into the carrier plate or is at least partially located outside the carrier plate, a cabinet body provided with a receiving space, and a turnover driving mechanism arranged on the cabinet body and used for driving the carrier plate to rotate relative to the cabinet body, so that the laser projection main machine is received in the receiving space or is at least partially turned out of the receiving space. The laser projection television can realize the receiving and hiding of the laser projection main machine when being turned off, and is favorable for compressing the occupied space of the laser projection television.

Description

Technical Field

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

[0002] Laser projection TVs typically consist of a laser projector and a projection screen. The laser projector projects images or videos onto the screen for the user to watch. Traditionally, the laser projector is mounted on a TV stand. To meet the projector's throw ratio requirements on the screen, the TV stand usually needs to be moved a certain distance, resulting in a large overall space requirement. Furthermore, after installation, the laser projector is prone to collisions, displacement, or dust accumulation on the lens, negatively impacting the user experience. Summary of the Invention

[0003] Therefore, it is necessary to provide a laser projection TV that addresses the issues of large overall space occupation, easy displacement of the laser projector host due to collisions, or dust accumulation on the lens.

[0004] A laser projection television includes:

[0005] Carrier plate;

[0006] A laser projection host is mounted on the carrier plate;

[0007] A telescopic drive mechanism is provided on the carrier plate and is used to drive the laser projection host to move relative to the carrier plate, so that the projection of the laser projection host on the carrier plate falls onto the carrier plate, or is at least partially located outside the carrier plate;

[0008] The cabinet has storage space; and,

[0009] A flipping drive mechanism is provided on the cabinet and is used to drive the carrier plate to rotate relative to the cabinet so that the laser projection host is housed in the housing space, or at least partially flipped out of the housing space.

[0010] In the aforementioned laser projection TV, when powered off, the telescopic drive mechanism allows the laser projector to slide relative to the carrier plate until the projection of the laser projector onto the carrier plate falls back onto the plate. This helps to reduce the overall space occupied by the laser projector and the carrier plate. Simultaneously, the carrier plate can be flipped to change the placement of the laser projector, adjusting it from horizontal to vertical, further reducing its horizontal space occupation. The laser projector is then stored within the cabinet, thus minimizing the overall space occupied by the laser projection TV when powered off. Furthermore, this concealed storage of the laser projector when powered off also reduces the risk of collisions, displacement, and dust accumulation on the lens.

[0011] In one embodiment, the laser projection TV further includes a projection screen, a roller, a crossbeam, and a lifting drive mechanism. The roller is rotatably disposed within the cabinet. The two ends of the projection screen are respectively connected to the roller and the crossbeam. The lifting drive mechanism is disposed within the cabinet and connected to the crossbeam. The lifting drive mechanism is used to drive the crossbeam to move away from the roller so that at least a portion of the projection screen unfolds outside the cabinet, or to drive the crossbeam to move closer to the roller so that the projection screen retracts onto the roller.

[0012] In one embodiment, the lifting drive mechanism includes a fixed component and a movable component. The fixed component is fixedly disposed in the cabinet body, and the movable component is movably connected to the fixed component and the crossbeam. The movable component can move relative to the fixed component to drive the crossbeam to move relative to the roller.

[0013] The laser projection TV also includes a support component, and the flip drive mechanism is disposed on the support component and is used to drive the carrier plate to rotate relative to the support component. The support component is located in the receiving space and is fixedly connected to the fixing component.

[0014] In one embodiment, the lifting drive mechanism further includes a lifting drive element, a first rod, and a first mating member. The lifting drive element is disposed on the fixed member, the movable member is connected to the first mating member, and the first mating member is threadedly engaged with the first rod. The lifting drive element is used to drive the first rod to rotate so that the first mating member drives the movable member to move relative to the first rod.

[0015] The flipping drive mechanism includes a drive shaft, a flipping shaft, a first synchronous belt, and a second synchronous belt. The drive shaft is driven by the first synchronous belt and the first rod. The flipping shaft is connected to the carrier plate and is driven by the drive shaft via the second synchronous belt.

[0016] In one embodiment, the reduction ratio from the first rod to the flipping shaft is [1:(4L / p)], where L is the travel of the first mating member and p is the lead screw lead of the first rod.

[0017] In one embodiment, the lifting drive mechanism includes a first driving wheel disposed on and coaxially arranged with the first rod, and the tilting drive mechanism includes a first driven wheel, a second driving wheel, and a second driven wheel. The first driven wheel is disposed on and coaxially arranged with the transmission shaft, and the second driven wheel is disposed on and coaxially arranged with the tilting shaft. The tilting drive mechanism further includes a speed reducer, which is drively connected to the transmission shaft and the second driving wheel. The first driving wheel and the first driven wheel are driven by the first synchronous belt, and the second driving wheel and the second driven wheel are driven by the second synchronous belt. The reduction ratio of the first driving wheel and the first driven wheel is 1:4, the reduction ratio of the speed reducer is 1:100, and the reduction ratio of the second driving wheel and the second driven wheel is 1:1.

[0018] In one embodiment, driven by the telescopic drive mechanism, the flip drive mechanism, and the lifting drive mechanism, the laser projection TV can switch between a power-on state and a power-off state. In the power-on state, the projection screen is unfolded outside the cabinet, the carrier plate is parallel to the horizontal direction, and the projection of the laser projection host on the carrier plate is at least partially located outside the carrier plate. The laser projection host is flipped out from the receiving space. In the power-off state, the projection screen is rolled up on the roller, the carrier plate is parallel to the vertical direction, the projection of the laser projection host on the carrier plate falls onto the carrier plate, and the laser projection host is received within the receiving space.

[0019] In one embodiment, in the power-off state, at least a portion of the laser projection host is located below the roller in the vertical direction. The flip-drive mechanism further includes a first sensor electrically connected to the telescopic drive mechanism. During the transition from the power-off state to the power-on state, the first sensor is used to drive the telescopic drive mechanism to operate after sensing that the carrier plate has flipped relative to the cabinet by a first preset angle. When the carrier plate has flipped relative to the cabinet by the first preset angle, the sliding path of the laser projection host relative to the carrier plate is located outside the roller.

[0020] In one embodiment, the support component of the laser projection television includes a first support plate and a second support plate disposed between the first support plate and the carrier plate. The flip drive mechanism includes a flip drive element, a flip shaft, and a third synchronous belt. The flip drive element is disposed on the first support plate. The flip shaft rotatably passes through the second support plate. One end of the flip shaft is rotatably disposed on the first support plate, and the other end is fixedly connected to the carrier plate. The output shaft of the flip drive element is in transmission cooperation with the flip shaft between the first support plate and the second support plate through the third synchronous belt.

[0021] In one embodiment, the support component further includes a base connected to the second support plate and a first limiting member disposed on the base. The laser projection TV further includes a second limiting member disposed on the carrier plate. In the powered-on state, the second limiting member abuts against the first limiting member on the lower side in the vertical direction.

[0022] And / or, the cabinet is provided with a third limiting member, and the laser projection TV also includes a fourth limiting member disposed on the carrier plate. In the power-off state, the third limiting member abuts against the outside of the fourth limiting member.

[0023] In one embodiment, the telescopic drive mechanism includes a telescopic drive element, a second rod, a second mating member, and a sliding assembly. The second mating member is connected to the laser projection host and threadedly engaged with the second rod. The telescopic drive element is used to drive the second rod to rotate. The sliding assembly is connected to the laser projection host and slidably disposed on the carrier plate.

[0024] In one embodiment, the sliding assembly includes a slider connected to the laser projection host and a bearing structure rotatably disposed on the slider. The carrier plate is provided with a sliding groove, the groove wall of which includes an opposing upper surface and a lower surface. The opposite sides of the bearing structure contact and roll with the upper surface and the lower surface, respectively.

[0025] In one embodiment, the laser projection TV further includes a fifth limiting member disposed on the side of the carrier plate facing the laser projection host, wherein in the power-off state, the fifth limiting member abuts against the laser projection host below in the vertical direction. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the laser projection TV in the powered-on state in some embodiments.

[0027] Figure 2 for Figure 1The diagram shows a laser projection TV from another angle.

[0028] Figure 3 This is a schematic diagram of the laser projection TV in the off state in some embodiments.

[0029] Figure 4 for Figure 3 The diagram shows a laser projection TV from another angle.

[0030] Figure 5 for Figure 3 The diagram shows the structural structure of some components of a laser projection television.

[0031] Figure 6 The diagram shows the structure of components such as the flip drive mechanism, telescopic drive mechanism, carrier plate, and laser projection host in some embodiments.

[0032] Figure 7 This is an exploded view of some components of a laser projection television in some embodiments.

[0033] Figure 8 for Figure 7 The diagram shows the structure of the component.

[0034] Figure 9 for Figure 8 A schematic diagram of the component from another angle.

[0035] Figure 10 This is a partially enlarged schematic diagram of a laser projection TV in the powered-on state in some embodiments.

[0036] Figure 11 This is a partially enlarged schematic diagram of a laser projection television in a powered-off state in some embodiments.

[0037] Figure 12 This is an exploded view of components such as the telescopic drive mechanism in some embodiments.

[0038] Figure 13 This is a schematic diagram of the carrier plate and telescopic drive mechanism in some embodiments.

[0039] Figure 14 This is a schematic diagram of the sliding component in some embodiments.

[0040] Figure 15 This is a schematic diagram of the structure in some embodiments where the sliding component is disposed in the sliding groove.

[0041] Figure 16 This is a schematic diagram of the structure of some components of a laser projection TV in the powered-on state in some embodiments.

[0042] Figure 17 for Figure 16 A magnified view of a portion of area B of the laser projection television shown.

[0043] Figure 18 This is a schematic diagram of the structure of components such as the projection screen and lifting drive mechanism in some embodiments.

[0044] Figure 19 for Figure 18 A schematic diagram of the component from another angle.

[0045] Figure 20 for Figure 5 A magnified view of a portion of area A of the laser projection television shown.

[0046] Figure 21 This is a schematic diagram of the structure in some embodiments where the lifting drive mechanism and the tilting drive mechanism share the same power.

[0047] Figure 22 for Figure 21 A magnified view of a portion of region C is shown.

[0048] Figure label:

[0049] 10. Laser projection TV; 11. Cabinet; 111. Through groove; 12. Laser projector host; 13. Projection screen; 14. Carrier plate; 141. Sliding groove; 15. Telescopic drive mechanism; 151. Telescopic drive element; 152. Second rod; 153. Second mating part; 154. Sliding assembly; 1541. Sliding element; 1542. Bearing structure; 155. Fourth synchronous belt; 16. Tilting drive mechanism; 161. Tilting drive element; 162. Tilting shaft; 163. Third synchronous belt; 164. Synchronous belt pulley; 165. Drive shaft; 166. First synchronous belt; 167. Second synchronous belt; 68. First driving wheel; 169. First driven wheel; 171. Second driven wheel; 172. Reducer; 173. Retaining ring; 18. Roller; 19. Crossbeam; 21. Lifting drive mechanism; 211. Fixed component; 212. Moving component; 2121. Support rod; 213. Lifting drive element; 214. First rod; 215. First mating component; 216. First support plate; 217. Second support plate; 218. Seat; 219. First limiting component; 221. Second limiting component; 222. Third limiting component; 223. Fourth limiting component; 224. Fifth limiting component; 225. First sensor. Detailed Implementation

[0050] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0051] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0052] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0053] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0054] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0055] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0056] Please see Figure 1 and Figure 2 As shown, the laser projection TV 10 provided in some embodiments of this application includes a cabinet 11, a laser projection host 12, and a projection screen 13. Figure 1 and Figure 2 The laser projection TV 10 shown is powered on. In the powered-on state, both the laser projection host 12 and the projection screen 13 are at least partially located outside the cabinet 11. The laser projection host 12 is placed horizontally and can project images or videos onto the projection screen 13 for the user to watch.

[0057] refer to Figure 3 and Figure 4 As shown, the laser projection TV 10 also has a power-off state. In the power-off state, both the laser projection TV 10 and the projection screen 13 are housed within the receiving space of the cabinet 11 and are hidden by the cabinet 11. Further, refer to... Figure 5 As shown, in some embodiments, when the laser projection TV 10 is in the off state, the laser projection host 12 is switched from horizontal to vertical placement, which helps to reduce the overall depth dimension (horizontal dimension) of the laser projection TV 10 in the off state.

[0058] refer to Figure 6As shown, in some embodiments, the laser projection television 10 further includes a carrier plate 14, a telescopic drive mechanism 15, and a flip drive mechanism 16. The laser projection host 12 is disposed on the carrier plate 14. The telescopic drive mechanism 15 is disposed on the carrier plate 14 and is used to drive the laser projection host 12 to slide relative to the carrier plate 14, so that the projection of the laser projection host 12 on the carrier plate 14 falls onto the carrier plate 14, or so that the projection of the laser projection host 12 on the carrier plate 14 is at least partially located outside the carrier plate 14. The flip drive mechanism 16 is disposed on the cabinet 11 and is used to drive the carrier plate 14 to rotate relative to the cabinet 11, so that the laser projection host 12 is received in the receiving space, or at least partially flipped out from the receiving space.

[0059] In some embodiments, driven by the telescopic drive mechanism 15 and the flip drive mechanism 16, the laser projection television 10 can switch between a power-on state and a power-off state. (Refer to...) Figure 1 and Figure 2 As shown, in the powered-on state, the carrier plate 14 is parallel to the horizontal direction, and the projection of the laser projection host 12 onto the carrier plate 14 is at least partially located outside the carrier plate 14, with the laser projection host 12 flipped out from the receiving space. (Reference) Figure 3 and Figure 5 As shown, in the power-off state, the carrier plate 14 is parallel to the vertical direction, and the projection of the laser projection host 12 on the carrier plate 14 falls onto the carrier plate 14, and the laser projection host 12 is housed in the housing space.

[0060] Therefore, when the laser projection TV 10 switches from the power-on state to the power-off state, the flipping of the carrier plate 14 adjusts the laser projection host 12 from a horizontal to a vertical position, which helps to reduce the horizontal space occupied by the laser projection host 12. The arrangement of housing the laser projection host 12 within the cabinet 11 also helps to reduce the overall space occupied by the laser projection TV 10 when powered off. Simultaneously, the telescopic drive mechanism 15 can drive the laser projection host 12 to slide relative to the carrier plate 14 until the projection of the laser projection host 12 onto the carrier plate 14 falls onto the carrier plate 14, which helps to reduce the overall space occupied by the laser projection host 12 and the carrier plate 14. For example, when the carrier plate 14 is placed vertically, it helps to reduce the vertical dimensions of the laser projection host 12 and the carrier plate 14, thereby reducing the vertical space occupied by the laser projection TV 10. Furthermore, the ability to conceal and hide the laser projection host 12 when powered off also helps to reduce the risk of collision, displacement, and dust accumulation on the lens. For example, in some embodiments, the cooperation of the telescopic drive mechanism 15 and the flip drive mechanism 16 allows the horizontal depth of the laser projection TV 10 to be controlled within 250mm when the TV is off. This is much smaller than the horizontal depth of traditional TV cabinets, which can better adapt to the installation needs of different TV cabinets, effectively save installation space, and improve the applicability and user experience.

[0061] refer to Figure 5 As shown, in some embodiments, the laser projection TV 10 further includes a roller 18, a crossbeam 19, and a lifting drive mechanism 21. The roller 18 is rotatably disposed inside the cabinet 11. The two ends of the projection screen 13 are respectively connected to the roller 18 and the crossbeam 19. The lifting drive mechanism 21 is used to drive the crossbeam 19 to move away from the roller 18, so that at least a portion of the projection screen 13 is unfolded outside the cabinet 11, or to drive the crossbeam 19 to move closer to the roller 18, so that the projection screen 13 is rolled up onto the roller 18. In the powered-on state, the projection screen 13 is unfolded outside the cabinet 11; in the powered-off state, the projection screen 13 is rolled up onto the roller 18. Thus, by rolling the projection screen 13 onto the roller 18 in the powered-off state, the projection screen 13 is housed within a storage space. Combined with the laser projection host 12 being able to be flipped and housed within the storage space, the space occupied by the laser projection TV 10 in the powered-off state can be effectively reduced, and dust accumulation on the projection screen 13 is also prevented. Meanwhile, the projection screen 13 is rolled up inside the cabinet 11 when the power is off, which makes it less likely to obstruct the wall, wallpaper, or other structures, thus improving the applicability and user experience of the laser projection TV 10.

[0062] refer to Figure 5 As shown, in some embodiments, the roller 18 is rotatably disposed inside the cabinet 11, and the two ends of the projection screen 13 are respectively connected to the roller 18 and the crossbeam 19. When the projection screen 13 is rolled up on the roller 18, if the lifting drive mechanism 21 drives the crossbeam 19 to move away from the roller 18, the crossbeam 19 will pull the projection screen 13 to drive the roller 18 to rotate relative to the cabinet 11, thereby causing the projection screen 13 to be pulled out and unfolded from the roller 18. When the crossbeam 19 moves towards the roller 18, it will drive the roller 18 to rotate in the opposite direction through the projection screen 13, thereby causing the projection screen 13 to be rolled up on the roller 18.

[0063] refer to Figure 1 and Figure 3 As shown, in some embodiments, the cabinet 11 has a through groove 111 on the side facing upwards in the vertical direction. When the crossbeam 19 moves away from the roller 18, the projection screen 13 passes through the through groove 111, which can be understood as a channel for the projection screen 13 to enter and exit the cabinet 11. When the crossbeam 19 moves towards the roller 18 until the laser projection TV 10 switches to the off state, the crossbeam 19 covers the through groove 111 to close the receiving space. This improves the appearance integrity of the laser projection TV 10 in the off state and helps prevent dust from entering through the through groove 111.

[0064] refer to Figure 7 and Figure 8As shown, in some embodiments, the laser projection television 10 further includes a support component fixedly disposed within the cabinet 11. The support component includes a first support plate 216 and a second support plate 217 disposed between the first support plate 216 and the carrier plate 14. The flip drive mechanism 16 includes a flip drive element 161, a flip shaft 162, and a third synchronous belt 163. The flip drive element 161 includes, but is not limited to, any applicable type of rotary motor or rotary electric motor, and has an output shaft capable of rotating about an axis. The flip drive element 161 is disposed on the first support plate 216, and the flip shaft 162 rotatably passes through the second support plate 217. One end of the flip shaft 162 is rotatably disposed on the first support plate 216, and the other end is fixedly connected to the carrier plate 14. The output shaft of the flip drive element 161 is in transmission cooperation with the flip shaft 162 between the first support plate 216 and the second support plate 217 via the third synchronous belt 163.

[0065] It is understandable that when the output shaft of the flip drive element 161 rotates around its axis, it will drive the flip shaft 162 to rotate relative to the first support plate 216 and the second support plate 217 via the third synchronous belt 163, thereby causing the carrier plate 14 to rotate relative to the cabinet 11. (Reference) Figure 9 As shown, in some embodiments, there are two first support plates 216 and two second support plates 217. The two first support plates 216 are located on opposite sides of the carrier plate 14, and the two second support plates 217 are located on opposite sides of the carrier plate 14. There are two flip shafts 162. One flip shaft 162 is located on the same side of the carrier plate 14 as the flip drive element 161 and is driven by the output shaft of the flip drive element 161 via a third synchronous belt 163. The other flip shaft 162 is located on the side of the carrier plate 14 opposite to the flip drive element 161 and is rotatably connected to the first support plate 216 and the second support plate 217 located on that side. The flip shaft 162 is fixedly connected to the carrier plate 14. Thus, the flip shaft 162 located on the side of the carrier plate 14 opposite to the flip drive element 161 can provide limiting and support for the rotation of the carrier plate 14 relative to the cabinet 11, which helps to improve the stability and accuracy of the carrier plate 14 driving the laser projection host 12 to rotate.

[0066] Of course, each of the opposite sides of the carrier plate 14 may have only one support plate, or more support plates, as long as they can provide support for the flipping drive element 161 and the flipping shaft 162. The holes on the second support plate 217 can be precisely rotated with the flipping shaft 162 through bearings, and the two synchronous pulleys 164 and the third synchronous belt 163 can achieve precise synchronous transmission through keying. In some embodiments, retaining rings 173 can be provided between the bearings on the flipping shaft 162 and the synchronous pulleys 164 to limit the axial position of the bearings and prevent axial movement of the bearings and the flipping shaft 162.

[0067] In some embodiments, the flip drive element 161 may be configured with a permanent magnet brake structure or an electromagnetic spring brake structure, which can achieve self-locking after power failure, thus reducing energy consumption. The flip drive element 161 may also be equipped with an encoder to achieve precise control over the flipping accuracy of the carrier plate 14 and the laser projection host 12 relative to the cabinet 11, which helps to improve the stability of the projected image and the flipping repeatability accuracy.

[0068] refer to Figure 7 As shown, in some embodiments, the flipping drive mechanism 16 further includes two synchronous pulleys 164. One synchronous pulley 164 is sleeved on the output shaft of the flipping drive element 161 and serves as the driving pulley, while the other synchronous pulley 164 is sleeved on the flipping shaft 162 and serves as the driven pulley. The two synchronous pulleys 164 are connected by a third synchronous belt 163 to realize the transmission connection between the flipping drive element 161 and the flipping shaft 162.

[0069] refer to Figure 10 As shown, in some embodiments, the support component further includes a base 218 connected to the second support plate 217 and a first limiting member 219 disposed on the base 218. The laser projection television 10 also includes a second limiting member 221 disposed on the carrier plate 14. During the process of switching the laser projection television 10 from the off state to the on state, the second limiting member 221 moves relative to the first limiting member 219 with the carrier plate 14 until the laser projection television 10 switches to the on state, at which point the second limiting member 221 abuts against the first limiting member 219 on its lower vertical side. For example, when the carrier plate 14 is parallel to the horizontal direction, the first limiting member 219 and the second limiting member 221 are exactly abutting against each other.

[0070] Therefore, the first limiting member 219 and the second limiting member 221 can limit and position the carrier plate 14 when the power is on. This not only improves the positioning accuracy of the laser projection host 12 when it is on, thus improving the projection quality, but also reduces the pressure of the carrier plate 14 on the flip drive mechanism 16, thereby reducing the risk of damage to the flip drive mechanism 16. The first limiting member 219 may be, but is not limited to, a bearing, and the second limiting member 221 may be, but is not limited to, a plate-like structure. As long as the first limiting member 219 and the second limiting member 221 can abut against each other to limit the carrier plate 14 when the power is on, it is acceptable.

[0071] refer to Figure 11As shown, in some embodiments, the cabinet 11 is provided with a third limiting member 222, which can be formed by a portion of the shell structure of the cabinet 11. The laser projection TV 10 also includes a fourth limiting member 223 disposed on the carrier plate 14. In the off state, the third limiting member 222 abuts against the outside of the fourth limiting member 223. For example, when the carrier plate 14 is parallel to the vertical direction, the third limiting member 222 and the fourth limiting member 223 are exactly abutting against each other. Thus, the third limiting member 222 and the fourth limiting member 223 can limit and position the carrier plate 14, improving the positioning accuracy of the carrier plate 14 in the off state. At the same time, they can also share the pressure of the carrier plate 14 on the flip drive mechanism 16 in the off state, reducing the risk of damage to the flip drive mechanism 16. The third limiting member 222 and the fourth limiting member 223 are both, but are not limited to, plate-like structures. In some embodiments, the second limiting member 221 and the fourth limiting member 223 are respectively disposed on the two opposite edges of the carrier plate 14 to reduce the risk of interference between the components. Of course, the placement and structure of each limiting member are not limited to those described in this application, as long as they can limit the carrier plate 14 in the power-on or power-off state.

[0072] refer to Figure 6 As shown, in some embodiments, the flip drive mechanism 16 is further provided with a tensioning structure (not shown in the figure). The tensioning structure is fixed on the first support plate 216 and can drive the flip drive element 161 to move towards or away from the flip shaft 162 relative to the first support plate 216, so as to adjust the distance between the output shaft of the flip drive element 161 and the flip shaft 162, thereby realizing the adjustment of the tension of the third synchronous belt 163 to meet different transmission requirements.

[0073] refer to Figure 12 and Figure 13 As shown, in some embodiments, the telescopic drive mechanism 15 includes a telescopic drive element 151, a second rod 152, a second mating member 153, and a sliding assembly 154. The second mating member 153 is connected to the laser projection host 12 and is threadedly engaged with the second rod 152. The second rod 152 and the second mating member 153 can be a lead screw and a nut, respectively. The telescopic drive element 151 is disposed on the carrier plate 14 and is used to drive the second rod 152 to rotate, thereby driving the second mating member 153 to move along the extension direction of the second rod 152, and thus driving the laser projection host 12 to move along the carrier plate 14. The sliding assembly 154 is connected to the laser projection host 12 and slidably disposed on the carrier plate 14. The sliding assembly 154 can limit, guide, and support the movement of the laser projection host 12 relative to the carrier plate 14, improving the stability and accuracy of the sliding of the laser projection host 12 along the carrier plate 14.

[0074] In some embodiments, the telescopic drive element 151 includes, but is not limited to, a rotary motor or rotary electric motor, and may be configured with a gear reducer to control the output torque. The telescopic drive element 151 has an output shaft capable of rotating about an axis, a synchronous pulley 164 is sleeved on the output shaft, and a synchronous pulley 164 is sleeved on the second rod 152, which is rotatably mounted on the carrier plate 14 via bearings or other components. The telescopic drive mechanism 15 also includes a fourth synchronous belt 155, through which the synchronous pulley 164 on the output shaft of the telescopic drive element 151 and the synchronous pulley 164 on the second rod 152 are connected. Thus, when the output shaft of the telescopic drive element 151 rotates about its axis, it can drive the second rod 152 to rotate via the fourth synchronous belt 155, thereby converting the rotational motion into linear motion of the second mating member 153 through the threaded engagement of the second rod 152 and the second mating member 153, thereby driving the laser projection host 12 to slide along the carrier plate 14.

[0075] In some embodiments, the telescopic drive mechanism 15 may also be provided with a tensioning structure to drive the telescopic drive element 151 to move towards or away from the second rod 152, thereby adjusting the tension of the fourth synchronous belt 155 to meet different transmission requirements. In some embodiments, the fourth synchronous belt 155 may also be omitted, and the output shaft of the telescopic drive element 151 can be connected to the second rod 152 via a coupling. Using the fourth synchronous belt 155 allows the height of the second rod 152 on the carrier plate 14 to be lower than the height of the output shaft of the telescopic drive element 151, thereby reducing the height of the second rod 152. This allows for better engagement with the second mating part 153 at the bottom of the laser projection host 12 and helps to compress the overall height dimension.

[0076] refer to Figure 14 and Figure 15As shown, in some embodiments, the sliding assembly 154 includes a slider 1541 connected to the laser projector host 12, and a bearing structure 1542 rotatably disposed on the slider 1541. The carrier plate 14 is provided with a sliding groove 141, which may be approximately C-shaped. The sidewalls of the sliding groove 141 include opposing upper and lower surfaces. The opposite sides of the bearing structure 1542 contact and roll with the upper and lower surfaces respectively. By providing the bearing structure 1542 on the sliding assembly 154 with its two sides tightly engaged with the sidewalls of the sliding groove 141, the stability and accuracy of the sliding of the laser projector host 12 relative to the carrier plate 14 are improved. At the same time, it is also beneficial to reduce the overall space occupied by the bearing structure 1542 and the structure with the sliding groove 141 on the carrier plate 14. This facilitates better housing of the laser projector host 12 and the carrier plate 14 in the cabinet 11 when the power is off, thereby reducing the overall space occupied by the laser projection TV 10. Of course, the sliding component 154 can also adopt standard parts such as linear guide rails and linear bearings, as long as it can enable the laser projection host 12 to slide relative to the carrier plate 14.

[0077] In some embodiments, the telescopic drive mechanism 15 is provided with two sets of sliding components 154. The sliding elements 1541 of the two sets of sliding components 154 are respectively connected to the two opposite edges of the laser projector 12. The two sets of sliding components 154 support, guide, and limit the laser projector 12, which helps to improve the stability and accuracy of the sliding of the laser projector 12 relative to the carrier plate 14. In some embodiments, each set of sliding components 154 includes multiple bearing structures 1542. The multiple bearing structures 1542 are arranged sequentially at intervals and can all be rolled in the rolling groove on the carrier plate 14. The provision of multiple bearing structures 1542 also helps to improve the stability and accuracy of the sliding of the laser projector 12 relative to the carrier plate 14.

[0078] refer to Figure 13 As shown, in some embodiments, the laser projection TV 10 further includes a fifth limiting member 224 disposed on the side of the carrier plate 14 facing the laser projection host 12. In the off state, the fifth limiting member 224 abuts against the lower part of the laser projection host 12 in the vertical direction. It can be understood that in the off state, if the carrier plate 14 is parallel to the vertical direction, the laser projection host 12 tends to move vertically downward due to gravity. The fifth limiting member 224 abuts against the lower part of the laser projection host 12 in the vertical direction, which can not only limit and position the laser projection host 12, but also bear at least part of the weight of the laser projection host 12, thereby sharing the pressure of the telescopic drive mechanism 15 and helping to reduce the risk of damage to the telescopic drive mechanism 15.

[0079] In some embodiments, the telescopic drive mechanism 15 further includes a second sensor (not shown), the position of which corresponds to the position of the fifth limiting member 224 and corresponds to the origin position of the laser projection host 12's extension and retraction relative to the carrier plate 14. The second sensor is activated each time the laser projection host 12 retracts along the carrier plate 14 to the off state, and this position is used as the zero-point starting point for the next power-on extension, so as to facilitate accurate monitoring of the position of the laser projection host 12.

[0080] refer to Figure 16 and Figure 17 As shown, in some embodiments, the lifting drive mechanism 21 includes a fixed component 211 and a movable component 212. The fixed component 211 is fixedly disposed inside the cabinet 11, and the movable component 212 is movably connected to the fixed component 211 and the crossbeam 19. The movable component 212 can move relative to the fixed component 211 to drive the crossbeam 19 to move relative to the roller 18. The flip drive mechanism 16 is disposed on the support component of the laser projection TV 10 and is used to drive the carrier plate 14 to rotate relative to the support component. The support component is located in the receiving space and is fixedly connected to the fixed component 211. The fixed component 211 can be a bracket, base, or other structure fixedly installed inside the cabinet 11 in the lifting drive mechanism 21. By fixing the support component used to set the flip drive mechanism 16 to the fixed component 211 of the lifting drive mechanism 21, it is beneficial to improve the assembly accuracy between the flip drive mechanism 16 and the lifting drive mechanism 21, thereby avoiding the risk of relative displacement between the laser projection host 12 and the projection screen 13, improving the assembly accuracy between the laser projection host 12 and the projection screen 13, and improving the image projection accuracy and projection quality.

[0081] In some embodiments, the two first support plates 216 and the two second support plates 217 located on opposite sides of the carrier plate 14 can be connected to the base 218, forming an integral structure through relative fixation by the base 218, and fixed to the fixing component 211 of the lifting drive mechanism 21. Any one of the first support plate 216, the second support plate 217 and the base 218 can be fixedly connected to the fixing component 211.

[0082] refer to Figure 18 and Figure 19As shown, in some embodiments, the lifting drive mechanism 21 further includes a lifting drive element 213, a first rod 214, and a first mating member 215. The lifting drive element 213 is disposed on the fixed member 211, and the movable member 212 is connected to the first mating member 215. The first mating member 215 is threadedly engaged with the first rod 214. The first rod 214 and the first mating member 215 can be a lead screw and a nut, respectively. The lifting drive element 213 may include, but is not limited to, any applicable type of rotary motor or rotary electric motor. The lifting drive element 213 is used to drive the first rod 214 to rotate, and through the threaded engagement between the first rod 214 and the first mating member 215, the rotational motion of the first rod 214 is converted into linear motion of the first mating member 215 along the first rod 214, thereby driving the movable member 212 to move relative to the first rod 214, so as to drive the crossbeam 19 to move relative to the roller 18.

[0083] The specific configuration of the movable component 212 is not limited, as long as it can move relative to the fixed component 211 under the drive of the first mating component 215, thereby driving the crossbeam 19 to move relative to the roller 18, thus realizing the lifting and lowering movement of the projection screen 13. In some embodiments, the movable component 212 includes multiple support rods 2121, which are arranged in an alternating manner to form a scissor bracket assembly. The connection between the support rods 2121 and the crossbeam 19 is rotatable, and the connection between any two support rods 2121 is rotatable. Of the two support rods 2121 furthest from the crossbeam 19, the end of one support rod 2121 is rotatably connected to the fixed component 211, and the end of the other support rod 2121 is rotatably connected to the first mating component 215. When the first mating component 215 moves relative to the fixed component 211 under the drive of the lifting drive element 213, it can drive the two support rods 2121 connected to the fixed component 211 and the first mating component 215 to move relative to each other, so that the ends of the two support rods 2121 move closer or further away from each other, changing the angle between the two support rods 2121, thereby driving the movable component 212 to drive the crossbeam 19 to rise and fall relative to the fixed component 211, thereby realizing the raising and lowering of the projection screen 13.

[0084] In some embodiments, the movable component 212 may have two sets of scissor bracket assemblies. Two first rods 214 and two first mating parts 215 may each be provided, with each first mating part 215 mounted on one first rod 214. The two sets of scissor bracket assemblies are respectively connected to the two first mating parts 215. The lifting drive element 213 can be a dual-output shaft motor. The two first rods 214 are located on opposite sides of the lifting drive element 213 and are connected one-to-one to the two output shafts of the lifting drive element 213 via couplings or other suitable connection methods. This allows the lifting drive element 213 to simultaneously drive the two sets of scissor bracket assemblies to rise and fall, improving the stability and accuracy of the projection screen 13's rise and fall. Of course, in other embodiments, when the movable component 212 has two sets of scissor bracket assemblies, the lifting drive element 213 may also have two sets. The output shafts of the two lifting drive elements 213 are arranged opposite to each other and are respectively used to drive the two first rods 214 to rotate, thereby driving the two sets of scissor bracket assemblies to rise and fall.

[0085] In the above embodiments, the lifting drive mechanism 21 drives the projection screen 13 to rise and fall through the lifting drive element 213, and the flip drive mechanism 16 drives the carrier plate 14 to flip the laser projection host 12 through the flip drive element 161. The power sources of the lifting drive mechanism 21 and the flip drive mechanism 16 are relatively independent and are not easy to interfere with each other, which helps to simplify the structural design of the laser projection TV 10 and reduce the design and manufacturing difficulty of the laser projection TV 10.

[0086] refer to Figure 20 , Figure 21 and Figure 22As shown, in some other embodiments, the lifting drive mechanism 21 and the tilting drive mechanism 16 may also share a common power source. For example, the tilting drive element 161 is omitted in the tilting drive mechanism 16. The tilting drive mechanism 16 includes a drive shaft 165, a tilting shaft 162, a first synchronous belt 166, and a second synchronous belt 167. The drive shaft 165 is driven by the first synchronous belt 166 to the first rod 214. The tilting shaft 162 is connected to the carrier plate 14 and is driven by the second synchronous belt 167 to the drive shaft 165. When the lifting drive element 213 drives the first rod 214 to rotate to lift the crossbeam 19 relative to the roller 18, the rotational power of the first rod 214 can drive the drive shaft 165 to rotate through the first synchronous belt 166. The rotation of the drive shaft 165 can drive the carrier plate 14 to rotate relative to the cabinet 11 through the second synchronous belt 167, thereby realizing the tilting of the laser projection host 12. This configuration, where the lifting drive mechanism 21 and the flipping drive mechanism 16 share a common power source, saves on the need for a flipping drive element 161, thus reducing the space occupied and manufacturing cost of the laser projection TV 10. Simultaneously, the lifting of the projection screen 13 is synchronized with the flipping of the laser projector 12, eliminating the need for complex separate programs to control the lifting of the projection screen 13 and the flipping of the laser projector 12. This reduces the control difficulty of the laser projection TV 10 and improves the motion coordination accuracy between the projection screen 13 and the laser projector 12.

[0087] In some embodiments, the lifting drive mechanism 21 includes a first driving wheel 168 disposed on and coaxially arranged with the first rod 214, and the tilting drive mechanism 16 includes a first driven wheel 169, a second driving wheel (not shown in the figure), and a second driven wheel 171. The first driven wheel 169 is sleeved on and coaxially arranged with the transmission shaft 165, and the second driven wheel 171 is disposed on and coaxially arranged with the tilting shaft 162. The tilting drive mechanism 16 also includes a reducer 172, which is drively connected to the transmission shaft 165 and the second driving wheel. The first driving wheel 168 and the first driven wheel 169 are driven by a first synchronous belt 166, and the second driving wheel and the second driven wheel 171 are driven by a second synchronous belt 167. The specific arrangement of the first driving wheel 168, the first driven wheel 169, the second driving wheel, and the second driven wheel 171 can be the same as the synchronous belt pulley 164 in the above embodiments, which is beneficial to improving the stability and accuracy of power transmission.

[0088] Furthermore, in some embodiments, the reduction ratio of the first driving wheel 168 and the first driven wheel 169 is 1:4, the reduction ratio of the reducer 172 is 1:100, and the reduction ratio of the second driving wheel and the second driven wheel 171 is 1:1. For example, in some embodiments, the first driving wheel 168 has 18 teeth, the first driven wheel 169 has 72 teeth, and both the second driving wheel and the second driven wheel 171 have 20 teeth. This allows the reduction ratio from the first rod 214 to the flip shaft 162 to be 1:400, which is beneficial because when the lifting drive mechanism 21 drives the projection screen 13 to switch between the power-on and power-off states, the carrier plate 14 precisely drives the laser projection host 12 to rotate 1 / 4 turn relative to the cabinet 11, i.e., rotate 90°, so that the laser projection host 12 can smoothly switch between the power-on and power-off states. The reducer 172 includes, but is not limited to, any suitable reducer such as a harmonic reducer or a planetary reducer.

[0089] Specifically, during the process of switching the laser projection TV 10 from the off state to the on state, the moving distance of the first mating component 215 is L, and the lead of the first lever 214 is p. Therefore, the number of rotations of the lifting drive element 213 is (L / p), and the tilt angle of the carrier plate 14 is 90°, or 1 / 4 turn. Thus, the reduction ratio from the first lever 214 to the tilt shaft 162 is [1:(4L / p)], meaning that for every (L / p) rotations of the lifting drive element 213, the tilt shaft 162 only needs to rotate 1 / 4 turn. For example, if L is 500mm and p is 5mm, then the lifting drive element 213 needs to rotate 100 times, and the tilt shaft 162 only needs to rotate 1 / 4 turn. Therefore, a reduction ratio of 1:400 is required to achieve the coordinated movement between the first lever 214 and the tilt shaft 162. The aforementioned reduction ratio enables the lifting drive mechanism 21 and the tilting drive mechanism 16 to work together to perform synchronous lifting and tilting, allowing the projection screen 13 and the laser projection host 12 to form a good linkage and realize the design of a common power source.

[0090] refer to Figure 5 and Figure 6 As shown, in some embodiments, in the power-off state, at least a portion of the laser projection host 12 is located below the roller 18 in the vertical direction, such that at least a portion of the dimensions of the laser projection host 12 and the roller 18 coincide in the horizontal direction in the power-off state. This is beneficial to further improve the structural compactness of the laser projection TV 10 in the power-off state and reduce the volume of the laser projection TV 10.

[0091] In some embodiments, the flip drive mechanism 16 further includes a first sensor 225, which is electrically connected to the telescopic drive mechanism 15. During the switching process from the off state to the on state, the first sensor 225 is used to drive the telescopic drive mechanism 15 to operate after sensing that the carrier plate 14 has flipped relative to the cabinet 11 by a first preset angle. Specifically, after the carrier plate 14 flips relative to the cabinet 11 from the off state by the first preset angle, the sliding path of the laser projector 12 relative to the carrier plate 14 is located outside the roller 18 under the drive of the telescopic drive mechanism 15. That is, the first sensor 225 can drive the telescopic drive mechanism 15 to operate only after the carrier plate 14 and the laser projector 12 have flipped from the off state by the first preset angle until the sliding path of the laser projector 12 is outside the roller 18. This avoids interference between the laser projector 12 and the roller 18 during the telescopic process, improving structural and performance reliability and reducing the risk of component damage.

[0092] In some embodiments, the first sensor 225 is disposed on the support component and is disposed corresponding to the flip axis 162. In the manufacturing process of the laser projection TV 10, a first preset angle is first obtained through simulation or experiment, and then the relative relationship between the flip axis 162 and the first sensor 225 is designed so that the sensing position on the flip axis 162 can be sensed by the first sensor 225 after the flip axis 162 rotates by the first preset angle.

[0093] In some embodiments, when the flip drive mechanism 16 is provided on the flip drive element 161, the first sensor 225 can be used as the zero-point reset sensor of the flip drive mechanism 16. By setting the sensing relationship between the flip shaft 162 and the first sensor 225, the first sensor 225 can be triggered every time the flip shaft 162 drives the carrier plate 14 to the off state. The trigger position of the flip shaft 162 and the first sensor 225 serves as the zero-point position for flipping back, and is also the starting point for the next power-on flipping out, which is beneficial for the control of the laser projection TV 10.

[0094] In some embodiments, during the switching process of the laser projection TV 10 from the off state to the on state, the lifting drive mechanism 21 drives the projection screen 13 to rise. The lifting drive mechanism 21 and the flip drive mechanism 16 simultaneously drive the carrier plate 14 to flip out the laser projection host 12, or the flip drive mechanism 16 drives the carrier plate 14 to flip out the laser projection host 12, until the carrier plate 14 flips to a second preset angle. Then, the telescopic drive mechanism 15 drives the laser projection host 12 to extend along the carrier plate 14. The second preset angle can be greater than or equal to the first preset angle. At the second preset angle, the sliding of the laser projection host 12 relative to the carrier plate 14 does not interfere with components such as the roller 18 and the cabinet 11. The specific setting of the second preset angle is not limited and can be designed according to the relative relationship between the roller 18, the cabinet 11, the carrier plate 14, and the laser projection host 12.

[0095] In some embodiments, during the switching process from the power-on state to the power-off state of the laser projection TV 10, the lifting drive mechanism 21 drives the projection screen 13 to descend. The telescopic drive mechanism 15 drives the laser projection TV 10 to slide relative to the carrier plate 14 to retract the laser projection TV 10 back onto the carrier plate 14, thereby increasing the overlap area between the laser projection TV 10 and the carrier plate 14. Until the laser projection TV 10 does not interfere with the components of the cabinet 11 and the roller 18 when it flips, the lifting drive mechanism 21 and the flipping drive mechanism 16 simultaneously drive the carrier plate 14 to flip and retract the laser projection host 12, or the flipping drive mechanism 16 drives the carrier plate 14 to flip and retract the laser projection host 12.

[0096] During the switching between the power-on and power-off states of the laser projection TV 10, the actions of each mechanism can be coordinated through the interaction of electrical signals from sensors such as the first sensor 225 and the second sensor. If, during the switching between the power-on and power-off states of the laser projection TV 10, the rotation angle of the carrier plate 14 relative to the cabinet 11 is 90°, and the rotation time is t1, then the extension / retraction of the laser projection host 12 driven by the telescopic drive mechanism 15 is L1mm, and the lead screw of the second rod 152 is p1mm. Therefore, the motor rotation speed of the telescopic drive element 151 is (L1 / p1), and the rotation time is assumed to be t2. The lifting / lowering stroke of the lifting drive mechanism 21 is L2mm, the lead screw of the first rod 214 is p2mm, and the rotation speed of the lifting drive element 213 is (L2 / p2), and the lifting / lowering time is assumed to be t3.

[0097] In some embodiments, during the transition from the power-off state to the power-on state, the projection screen 13 rises. After the flip drive mechanism 16 drives the carrier plate 14 to flip to a second preset angle (this action can be achieved by the preset number of motor steps of the flip drive element 161), the telescopic drive mechanism 15 drives the laser projection host 12 to extend. The flip drive mechanism 16 simultaneously drives the carrier plate 14 to flip until it extends to the position corresponding to the power-on state. At this point, the carrier plate 14 has just flipped 90°, and the projection screen 13 rises to the position corresponding to the power-on state. The total power-on time t ≤ t1 + t2 + t3, which helps to shorten the total power-on time and improve the user experience.

[0098] In some embodiments, during the transition from the power-on state to the power-off state, the telescopic drive mechanism 15 first causes the laser projection host 12 to retract relative to the carrier plate 14 until the laser projection host 12 does not interfere with the cabinet 11 and the roller 18 when it is flipped (this action can be achieved by preset motor running steps). Then, the flipping drive mechanism 16 starts to drive the carrier plate 14 to flip, and the telescopic drive mechanism 15 simultaneously drives the laser projection host 12 to retract until the laser projection host 12 retracts to the power-off position. At this point, the carrier plate 14 flips back to the power-off position, and the projection screen 13 descends to the power-off position. The total power-off time t ≤ t1 + t2 + t3, which helps to shorten the total power-off time and improve the user experience.

[0099] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0100] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A laser projection television, characterized in that, include: Carrier plate; A laser projection host, wherein the laser projection host is mounted on the carrier plate; A telescopic drive mechanism is disposed on the carrier plate and is used to drive the laser projection host to move relative to the carrier plate, so that the projection of the laser projection host on the carrier plate falls onto the carrier plate, or is at least partially located outside the carrier plate; Cabinet, the cabinet having a receiving space; and, A flipping drive mechanism is provided on the cabinet and is used to drive the carrier plate to rotate relative to the cabinet so that the laser projection host is housed in the housing space, or at least partially flipped out of the housing space.

2. The laser projection television according to claim 1, characterized in that, The laser projection TV also includes a projection screen, a roller, a crossbeam, and a lifting drive mechanism. The roller is rotatably disposed inside the cabinet. The two ends of the projection screen are respectively connected to the roller and the crossbeam. The lifting drive mechanism is disposed inside the cabinet and connected to the crossbeam. The lifting drive mechanism is used to drive the crossbeam to move away from the roller so that at least a portion of the projection screen unfolds outside the cabinet, or to drive the crossbeam to move closer to the roller so that the projection screen retracts onto the roller.

3. The laser projection television according to claim 2, characterized in that, The lifting drive mechanism includes a fixed component and a movable component. The fixed component is fixedly installed inside the cabinet, and the movable component is movably connected to the fixed component and the crossbeam. The movable component can move relative to the fixed component to drive the crossbeam to move relative to the roller. The laser projection TV also includes a support component, and the flip drive mechanism is disposed on the support component and is used to drive the carrier plate to rotate relative to the support component. The support component is located in the receiving space and is fixedly connected to the fixing component.

4. The laser projection television according to claim 3, characterized in that, The lifting drive mechanism further includes a lifting drive element, a first rod, and a first mating part. The lifting drive element is disposed on the fixed part, the movable part is connected to the first mating part, the first mating part is threadedly engaged with the first rod, and the lifting drive element is used to drive the first rod to rotate so that the first mating part drives the movable part to move relative to the first rod. The tilting drive mechanism includes a drive shaft, a tilting shaft, a first synchronous belt, and a second synchronous belt. The drive shaft is connected to the first rod via the first synchronous belt. The tilting shaft is connected to the carrier plate and is connected to the drive shaft via the second synchronous belt. The reduction ratio from the first rod to the tilting shaft is [1:(4L / p)], where L is the travel distance of the first mating component, and p is the lead screw lead of the first rod; and / or, The lifting drive mechanism includes a first driving wheel mounted on and coaxially arranged with the first rod. The tilting drive mechanism includes a first driven wheel, a second driving wheel, and a second driven wheel. The first driven wheel is mounted on and coaxially arranged with the transmission shaft, and the second driven wheel is mounted on and coaxially arranged with the tilting shaft. The tilting drive mechanism also includes a speed reducer, which is drivenly connected to the transmission shaft and the second driving wheel. The first driving wheel and the first driven wheel are driven by the first synchronous belt, and the second driving wheel and the second driven wheel are driven by the second synchronous belt. The reduction ratio of the first driving wheel and the first driven wheel is 1:4, the reduction ratio of the speed reducer is 1:100, and the reduction ratio of the second driving wheel and the second driven wheel is 1:

1.

5. The laser projection television according to claim 2, characterized in that, Driven by the telescopic drive mechanism, the flip drive mechanism, and the lifting drive mechanism, the laser projection TV can switch between a power-on state and a power-off state. In the power-on state, the projection screen is unfolded outside the cabinet, the carrier plate is parallel to the horizontal direction, and at least part of the projection of the laser projection host on the carrier plate is located outside the carrier plate. The laser projection host flips out from the receiving space. In the power-off state, the projection screen is rolled up on the roller, the carrier plate is parallel to the vertical direction, the projection of the laser projection host on the carrier plate falls onto the carrier plate, and the laser projection host is received in the receiving space.

6. The laser projection television according to claim 5, characterized in that, In the off state, at least a portion of the laser projection host is located below the roller in the vertical direction. The flip drive mechanism further includes a first sensor electrically connected to the telescopic drive mechanism. During the transition from the off state to the on state, the first sensor is used to drive the telescopic drive mechanism to operate after sensing that the carrier plate has flipped relative to the cabinet by a first preset angle. When the carrier plate has flipped relative to the cabinet by the first preset angle, the sliding path of the laser projection host relative to the carrier plate is located outside the roller.

7. The laser projection television according to claim 5, characterized in that, The supporting component of the laser projection TV includes a first supporting plate and a second supporting plate disposed between the first supporting plate and the carrier plate. The flipping drive mechanism includes a flipping drive element, a flipping shaft, and a third synchronous belt. The flipping drive element is disposed on the first supporting plate. The flipping shaft rotatably passes through the second supporting plate. One end of the flipping shaft is rotatably disposed on the first supporting plate, and the other end is fixedly connected to the carrier plate. The output shaft of the flipping drive element is in transmission cooperation with the flipping shaft between the first supporting plate and the second supporting plate through the third synchronous belt.

8. The laser projection television according to claim 7, characterized in that, The supporting component also includes a base connected to the second supporting plate and a first limiting member disposed on the base. The laser projection TV also includes a second limiting member disposed on the carrier plate. In the powered-on state, the second limiting member abuts against the first limiting member on the lower side in the vertical direction. And / or, the cabinet is provided with a third limiting member, and the laser projection TV also includes a fourth limiting member disposed on the carrier plate. In the power-off state, the third limiting member abuts against the outside of the fourth limiting member.

9. The laser projection television according to claim 5, characterized in that, The telescopic drive mechanism includes a telescopic drive element, a second rod, a second mating component, and a sliding assembly. The second mating component is connected to the laser projection host and is threadedly engaged with the second rod. The telescopic drive element is used to drive the second rod to rotate. The sliding assembly is connected to the laser projection host and is slidably disposed on the carrier plate.

10. The laser projection television according to claim 9, characterized in that, The sliding assembly includes a sliding member connected to the laser projection host and a bearing structure rotatably mounted on the sliding member. The carrier plate has a sliding groove, the groove wall of which includes opposing upper and lower surfaces. The opposite sides of the bearing structure contact and roll with the upper and lower surfaces respectively; and / or, The laser projection TV also includes a fifth limiting member disposed on the side of the carrier plate facing the laser projection host. In the power-off state, the fifth limiting member abuts against the laser projection host from below in the vertical direction.

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