Image distortion correction method of projector and projector

Abstract

The invention relates to the technical field of projection equipment, in particular to an image distortion correction method of a projector, which comprises the following steps of: acquiring an actual angle parameter of an electronic level meter on an optical module based on a controller; comparing the actual angle parameter of the optical module with the theoretical angle parameter of the optical module based on the controller to obtain an adjustment angle of the optical module; based on the adjustment angle, starting a driving mechanism by using a controller to enable the angle of the optical module to be matched with the adjustment angle; and after the angle of the optical module is matched with the adjustment angle, the distortion of the image is eliminated, and distortion calibration is completed. According to the method, the arrangement of elements is reduced, the distortion processing step is reduced, the complexity during adjustment is greatly reduced, and after the initial adjustment is finished, the adjustment accuracy is greatly improved. In addition, the controller can continuously monitor the state of the optical module according to the parameters fed back by the electronic level meter, so that the angle of the optical module can be adjusted at any time, and the condition of image distortion when the projector is used is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of projection equipment, and in particular to an image distortion correction method for a projector and a projector. Background Art

[0002] A projector is a device that converts electronic image signals into a visible image on a large screen. It is commonly used in education, business presentations, home theaters, and other occasions where a large screen display is required. A projector displays images by shining light on a transmissive or reflective surface. Common projection methods include: Transmissive projection: In this method, the image is generated on a transparent film or other medium, and light passes through these images and is projected onto the screen in a magnified form. Reflective projection: Modern digital projectors usually use reflective technology, in which the image is generated by a small digital display panel and projected onto the screen through a lens system. The basic reason for the distortion of the projector is that its projection element cannot be perpendicular to the screen, which leads to unclear images.

[0003] However, the prior art still has shortcomings. For example, patent number: CN200680026814.6 is an arrangement structure for correcting the distortion of an image projected on a projection surface, comprising: a) a laser for emitting a laser beam; b) a scanner, comprising: a first scanning mirror for scanning the laser beam along a first scanning direction to form a scanning line on the projection surface; and a second scanning mirror for scanning the scanning line along a second scanning direction substantially perpendicular to the first scanning direction to form a grating pattern of scanning lines on the projection surface. Since the laser beam travels at different distances between the second scanning mirror and the projection surface, the scanning lines have different lengths in the first scanning direction, and each scanning line has a plurality of pixels in the first scanning direction. However, the adjustment method of this method is complicated and its practicality is extremely low. Summary of the invention

[0004] The invention provides an image distortion correction method of a projector and a projector, which are used to solve the problem raised in the background technology.

[0005] In order to achieve the above-mentioned invention object, the present invention provides the following technical solutions: A method for correcting image distortion of a projector, comprising: A method for correcting image distortion of a projector, comprising the following steps:

[0006] Acquire actual angle parameters of the electronic level on the optical module based on the controller;

[0007] Based on the comparison between the actual angle parameter of the optical module and the theoretical angle parameter of the optical module by the controller, the adjustment angle of the optical module is obtained;

[0008] Based on the adjustment angle, a controller is used to start a driving mechanism so that the angle of the optical module is adapted to the adjustment angle;

[0009] After the angle of the optical module is adapted to the adjustment angle, the image distortion is eliminated and the distortion calibration is completed.

[0010] Preferably, when the controller is used to start the driving mechanism to make the angle of the optical module adapt to the adjustment angle, the controller controls the output end of the motor to drive the rocker arm to rotate, and then the horizontal angle of the optical module is adapted to the horizontal adjustment angle through the lifting and adjusting seat, and then the controller controls the second output end of the motor to drive the connecting rod to rotate, so as to adapt the vertical angle of the optical module to the vertical adjustment angle.

[0011] Preferably, after eliminating the distortion of the image, the angle parameters of the optical module may continue to be recorded by an electronic level to keep the optical module in a normal working state.

[0012] Preferably, the distortion calibration includes multiple times, including: based on the real-time acquisition of the actual angle parameters of the electronic level by the controller, the controller judges the actual angle parameters acquired in real time, and when distortion exists, performs an angle and adjustment angle adaptation; when the adaptation is completed, the actual angle parameters of the electronic level are acquired in real time by the controller again, thereby completing multiple distortion calibrations.

[0013] Preferably, a projector image distortion correction device is suitable for a projector image distortion correction method described in any one of the above items, comprising: a housing, an optical module, an electronic level, a controller and a driving mechanism, the housing is connected to the optical module, the optical module is connected to the output end of the driving mechanism in the housing, the driving mechanism is electrically connected to the controller, the controller is electrically connected to the electronic level, the controller is installed in the housing, and the electronic level is installed on the optical module.

[0014] Preferably, the driving mechanism includes: a motor, a rocker arm, a slider, a lifting and adjusting seat, a connecting rod and a second connecting rod. The motor is installed in the shell, the output end of the motor is connected to the end of the rocker arm, the other end of the rocker arm is hinged to the bottom of the lifting and adjusting seat, a plurality of sliders are installed at the bottom of the lifting and adjusting seat, the sliders are interactively connected with the arc-shaped slide rails in the shell, the center of the arc-shaped slide rails is located below the motor, the output end of the second motor on the lifting and adjusting seat is connected to the bottom end of the connecting rod, the top end of the connecting rod is hinged to the top end of the second connecting rod, and the top end of the second connecting rod is hinged to the optical module.

[0015] Preferably, a filter is provided on the side wall of the housing away from the optical module, a cooling fan mechanism is installed in the housing, the output end of the cooling fan mechanism is arranged toward the filter, and two sealing plates are slidably connected to the side wall of the housing to seal the filter.

[0016] Preferably, the sealing plate is connected to the end of the adjusting mechanism, the adjusting mechanism is installed in the shell, the other end of the adjusting mechanism is connected to the filter screen 2, the side wall of the shell is equipped with the filter screen 3, and the inner wall of the shell is slidably connected with the filter screen 2 to seal the filter screen 3.

[0017] Preferably, the regulating mechanism comprises: a heat absorbing tube, a heat absorbing tube is installed on each of the two inner walls of the shell, a piston is slidably sealed in the heat absorbing tube, a guide rod is inserted on the piston, the guide rod is slidably sealed with a circular hole and a second circular hole on the heat absorbing tube, one end of the guide rod is connected to the sealing plate through a conductive spring, the conductive spring is slidably connected in the guide tube, the guide tube is inserted on the inner wall of the shell, the other end of the guide rod is connected to the second filter, nitrogen is injected between one side of the piston and the inner wall of the heat absorbing tube, the other side of the piston is connected to the other inner wall of the heat absorbing tube through a spring, and the spring is arranged close to the second filter.

[0018] Preferably, it also includes: a dust shield plate, a mounting ring is installed in the mounting hole of the outer shell, the annular groove on the inner wall of the mounting ring is rotatably connected to the optical module, a dust shield motor is installed in the outer shell, and the end of the dust shield motor extending outside the outer shell is connected to a gear, the gear is meshed and connected to gear 2, gear 2 is rotatably connected to the outer shell, and a dust shield plate is connected to the bottom of the gear and gear 2 to protect the output end of the optical module.

[0019] The beneficial effects of the present invention are as follows:

[0020] In the scheme of the present invention:

[0021] This method reduces the setting of components, thereby reducing the steps of distortion processing, greatly reducing the complexity of adjustment, and after completing the initial adjustment, the controller can also continuously monitor the status of the optical module based on the parameters fed back by the electronic level, so as to adjust its angle at any time, thereby avoiding image distortion when the projector is in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a flow chart of the present invention;

[0023] Figure 2 It is a schematic diagram of the main structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the connection relationship between the optical module, the connecting rod and the second connecting rod of the present invention;

[0025] Figure 4 It is a cross-sectional view of the main body of the present invention;

[0026] Figure 5 It is a schematic diagram of the connection relationship between the sealing plate and the conductive spring of the present invention;

[0027] Figure 6 is a cross-sectional view of a heat absorbing tube of the present invention;

[0028] Figure 7 Schematic diagram of the relative position relationship between the optical module and the dust shield of the present invention;

[0029] Figure 8 It is a cross-sectional view of a U-shaped tube of the present invention;

[0030] Fig. 9 It is a schematic diagram of the connection relationship between the ash discharge pipe and the discharge pipe of the present invention;

[0031] Fig.10 It is a schematic diagram of the connection relationship between the telescopic pipe and the spring 2 of the present invention;

[0032] Fig.11 It is a schematic diagram of the connection relationship between the spring three and the lifting column of the present invention;

[0033] Fig.12 It is a schematic diagram of the friction fit relationship between the tapered rubber wheel and the spline shaft of the present invention;

[0034] Fig.13 It is a schematic diagram of the installation position of the bump of the present invention.

[0035] Wherein: housing 1, optical module 2, dust shield 3, motor 4, rocker 5, slider 6, lifting adjustment seat 7, connecting rod 8, connecting rod 2 9, cooling fan mechanism 10, filter 11, adjustment mechanism 12, filter 2 13, sealing plate 14, heat absorption pipe 15, piston 16, guide rod 17, conduction spring 18, spring 19, gear 20, pipeline 21, U-shaped pipe 22, pump housing 23, blade 24, ash discharge mechanism 25, ash discharge pipe 26, discharge pipe 27, discharge column 28, push rod 29, telescopic pipe 30, spring 2 31, bump 32, power motor 33, conical rubber wheel 34, spline shaft 35, push rod 2 36, lifting pipe 37, spring 3 38, lifting column 39, round filter 40, round hole 3 41. DETAILED DESCRIPTION

[0036] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0037] Example 1: Reference Figure 1-Figure 13 , a method for correcting image distortion of a projector, comprising the following steps:

[0038] Acquiring actual angle parameters of the electronic level on the optical module 2 based on the controller;

[0039] Based on the comparison between the actual angle parameter of the optical module 2 and the theoretical angle parameter of the optical module 2 by the controller, the adjustment angle of the optical module 2 is obtained;

[0040] Based on the adjustment angle, the controller is used to start the driving mechanism so that the angle of the optical module 2 is adapted to the adjustment angle;

[0041] After the angle of the optical module 2 is adapted to the adjustment angle, the image distortion is eliminated and the distortion calibration is completed.

[0042] The principles and beneficial effects of the above scheme are:

[0043] The specific model of the electronic level is: SCT726T. The electronic level can transmit the actual angle parameters of the optical module 2 to the controller. The controller compares the actual angle parameters of the optical module 2 with the theoretical angle parameters of the optical module 2 to obtain the adjustment angle of the optical module 2, which greatly increases the accuracy of the adjustment angle acquisition. Then, based on the adjustment angle, the controller starts the driving mechanism to make the angle of the optical module 2 equal to the adjustment angle, thereby eliminating the distortion of the image. The method reduces the setting of components, thereby reducing the steps of distortion processing, greatly reducing the complexity of adjustment, and after the initial adjustment, the controller can also continuously monitor the state of the optical module 2 according to the parameters fed back by the electronic level, so as to adjust its angle at any time, thereby avoiding the situation of image distortion when the projector is in use; and in the process of eliminating image distortion, the setting of components in the device is reduced, and the setting of the control program is reduced, which greatly reduces the power consumed by the device when working, and can reduce the use of electric energy. It can be further known that the reduction in the use of electric energy reduces the problem of heating of components in the device, which can avoid secondary distortion of the optical module 2 after heating, and avoid the occurrence of failure of the device when in use.

[0044] Example 2: Reference Figure 1-Figure 13 When the controller is used to start the driving mechanism to make the angle of the optical module 2 adapt to the adjustment angle, the controller controls the output end of the motor 4 to drive the swing rod 5 to rotate, and then the horizontal angle of the optical module 2 is adapted to the horizontal adjustment angle through the lifting adjustment seat 7, and then the controller controls the second output end of the motor to drive the connecting rod 8 to rotate, so that the vertical angle of the optical module 2 is adapted to the vertical adjustment angle.

[0045] The principles and beneficial effects of the above scheme are:

[0046] When adapting the angle of the optical module 2 to the adjustment angle, the controller first drives the lifting adjustment seat 7 to move through the motor 4, thereby completing the adaptation of the horizontal angle of the optical module 2 to the horizontal adjustment angle, and then drives the vertical angle of the optical module 2 to adapt to the vertical adjustment angle through the motor 2. Adjusting the angle of the optical module 2 twice greatly improves the accuracy of the angle adjustment and improves the efficiency of distortion correction.

[0047] Example 3: Reference Figure 1-Figure 13After eliminating the image distortion, the angle parameters of the optical module 2 can continue to be recorded by the electronic level to keep the optical module 2 in a normal working state.

[0048] The principles and beneficial effects of the above scheme are:

[0049] After eliminating the image distortion, the angle parameters of the optical module 2 can continue to be recorded through the electronic level, thereby keeping the optical module 2 in a normal working state, further improving the practicability of the method.

[0050] Example 4: Reference Figure 1-Figure 13 The distortion calibration includes multiple times, including: based on the controller real-time acquisition of the actual angle parameters of the electronic level, the controller judges the actual angle parameters acquired in real time, and when distortion exists, an angle and adjustment angle adaptation is performed; after the adaptation is completed, the controller again acquires the actual angle parameters of the electronic level in real time, thereby completing multiple distortion calibrations.

[0051] The principles and beneficial effects of the above scheme are:

[0052] The controller can obtain the actual angle of the electronic level in real time, thereby realizing the device's monitoring of the angle. The device can adjust the angle of the optical module 2 at any time according to actual conditions, which greatly improves the practicability of the device and its adaptability to different working conditions.

[0053] Example 5: Reference Figure 1-Figure 13 A projector image distortion correction device, suitable for any of the above-mentioned projector image distortion correction methods, comprising: a housing 1, an optical module 2, an electronic level, a controller and a driving mechanism, the housing 1 is connected with the optical module 2, the optical module 2 is connected to the output end of the driving mechanism in the housing 1, the driving mechanism is electrically connected to the controller, the controller is electrically connected to the electronic level, the controller is installed in the housing 1, and the electronic level is installed on the optical module 2.

[0054] The principles and beneficial effects of the above scheme are:

[0055] The housing 1 provides installation space for the optical module 2, the controller and the driving mechanism. Since the electronic level is installed on the optical module 2, the accuracy of parameter acquisition is improved while the ability to monitor the state of the optical module 2 is also improved. The controller is electrically connected to the electronic level and the driving mechanism. The driving mechanism adjusts the angle of the optical module 2, which greatly reduces the difficulty of angle adjustment. At the same time, the setting of the above-mentioned components greatly reduces the difficulty of eliminating image distortion, which is extremely beneficial to reducing the difficulty of manufacturing the device in actual production. In addition, the manufacturing cost is low, which greatly improves the practicability of the device.

[0056] Example 6: Reference Figure 1-Figure 13 The driving mechanism includes: a motor 4, a rocker arm 5, a slider 6, a lifting and adjusting seat 7, a connecting rod 8 and a second connecting rod 9. The motor 4 is installed in the housing 1, and the output end of the motor 4 is connected to the end of the rocker arm 5. The other end of the rocker arm 5 is hinged to the bottom of the lifting and adjusting seat 7. A plurality of sliders 6 are installed at the bottom of the lifting and adjusting seat 7. The sliders 6 are interactively connected with the arc-shaped slide rail in the housing 1. The center of the arc-shaped slide rail is located below the motor 4. The output end of the second motor on the lifting and adjusting seat 7 is connected to the bottom end of the connecting rod 8. The top end of the connecting rod 8 is hinged to the top end of the second connecting rod 9. The top end of the second connecting rod 9 is hinged to the optical module 2.

[0057] The principles and beneficial effects of the above scheme are:

[0058] When adjusting the angle, the motor 4 starts to drive the swing rod 5 to rotate, and with the cooperation of the arc-shaped slide rail and the slider 6, it drives the movement of the lifting adjustment seat 7 to complete the adjustment of the horizontal angle of the optical module 2. Then the motor 2 starts to drive the connecting rod 8 to rotate, and the connecting rod 8 drives the connecting rod 2 9 to move to complete the adjustment of the longitudinal angle of the optical module 2. This not only simplifies the complexity of the mechanism, but also greatly reduces the space occupied by the device. It has the characteristics of high efficiency and excellent practicality for image distortion processing.

[0059] Example 7: Reference Figure 1-Figure 13 A filter screen 11 is provided on the side wall of the housing 1 away from the optical module 2. A cooling fan mechanism 10 is installed in the housing 1. The output end of the cooling fan mechanism 10 is arranged toward the filter screen 11. Two sealing plates 14 are slidably connected to the side wall of the housing 1 to seal the filter screen 11.

[0060] The principles and beneficial effects of the above scheme are:

[0061] The setting of the filter 11 can provide a heat dissipation structure for the components inside the shell 1, while reducing the probability of external dust entering the device and avoiding damage to the internal components. The cooling fan mechanism 10 can assist the circulation of internal and external air, further increasing the efficiency of temperature reduction. The sealing plate 14 slidably connected to the shell 1 can protect the filter 11 and prevent dust accumulation on the filter 11 when the device is not working.

[0062] Example 8: Reference Figure 1-Figure 13 The sealing plate 14 is connected to the end of the adjusting mechanism 12, the adjusting mechanism 12 is installed in the shell 1, the other end of the adjusting mechanism 12 is connected to the filter screen 2 13, the side wall of the shell 1 is equipped with the filter screen 3, and the inner wall of the shell 1 is slidably connected with the filter screen 2 13 to seal the filter screen 3.

[0063] The principles and beneficial effects of the above scheme are:

[0064] The sealing plate 14 seals or releases the seal of the filter 11 through the adjusting mechanism 12. In addition, the adjusting mechanism 12 can drive the filter 2 13 to move. When the device starts working, the adjusting mechanism 12 releases the seal of the filter 2 13 on the filter 3. At this time, the cooling fan mechanism 10 works, and the air outside the device enters the device through the filter 11, cools the internal parts, and is discharged after passing through the filter 2 13 and the filter 3, completing the cooling process.

[0065] Example 9: Reference Figure 1-Figure 13 The regulating mechanism 12 comprises: a heat absorbing tube 15, each of the two inner walls of the shell 1 is provided with a heat absorbing tube 15, a piston 16 is slidably sealed in the heat absorbing tube 15, a guide rod 17 is inserted on the piston 16, the guide rod 17 is slidably sealed with the circular hole and the second circular hole on the heat absorbing tube 15, one end of the guide rod 17 is connected to the sealing plate 14 through a conductive spring 18, the conductive spring 18 is slidably connected in the guide tube, the guide tube is inserted on the inner wall of the shell 1, the other end of the guide rod 17 is connected to the second filter screen 13, nitrogen is injected between one side of the piston 16 and the inner wall of the heat absorbing tube 15, the other side of the piston 16 is connected to the other inner wall of the heat absorbing tube 15 through a spring 19, and the spring 19 is arranged close to the second filter screen 13.

[0066] The principles and beneficial effects of the above scheme are:

[0067] The power for opening the sealing plate 14 and the second filter 13 comes from the nitrogen in the heat absorption tube 15. Since the temperature is low when the device starts working, but as the working time increases, the temperature gradually rises. At this time, the nitrogen begins to absorb heat and pushes the piston 16 to move toward the optical module 2. The spring 19 is compressed, and the guide rod 17 on the piston 16 moves synchronously. One end of the guide rod 17 drives the second filter 13 to move to release the seal of the third filter. The other end of the guide rod 17 drives the conductive spring 18 to move, and the guide tube facilitates its movement. Since the conductive spring 18 is specifically a spiral structure, when one end of it starts to move, the other end connected to the sealing plate 14 is in a stationary state until the conductive spring 18 is stretched to a certain length, and the sealing plate 14 starts to move. The advantage of this setting is that it can increase the initial velocity of the sealing plate 14. After its initial velocity is instantly accelerated, the surrounding airflow intensity increases, and some dust or impurities remaining on the filter 11 can be taken away, thereby achieving the cleaning of the filter 11. Based on this scheme, it can be seen that the device reduces the setting of the cleaning mechanism and increases the cleaning effect of the filter 11. After the conductive spring 18 is stretched, its structure can play a buffering role, thereby slowing down the movement of the sealing plate 14 to prevent it from excessively hitting the guide tube. Further, based on the structure of the conductive spring 18 and common knowledge, it can be seen that after the guide rod 17 moves in the opposite direction, the two sealing plates 14 can be quickly closed to seal the filter 11 in time. When the device is used in a dusty environment, it can effectively prevent dust from hanging on the filter 11.

[0068] Example 10: Reference Figure 1-Figure 13 , also includes: a dust shield plate 3, a mounting ring is installed in the mounting hole of the shell 1, the annular groove on the inner wall of the mounting ring is rotatably connected to the optical module 2, a dust shield motor is installed in the shell 1, and the end of the dust shield motor passing through the outside of the shell 1 is connected with a gear 20, the gear 20 is meshed and connected with the gear 2, the gear 2 is rotatably connected with the shell 1, and the gear 20 and the bottom of the gear 2 are each connected with a dust shield plate 3 to protect the output end of the optical module 2.

[0069] The principles and beneficial effects of the above scheme are:

[0070] The setting of the dust shield 3 can not only prevent the accumulation of dust on the surface of the high-precision optical module 2, but also provide effective physical protection for the device when not in use to prevent it from being scratched. When the two dust shields 3 need to be opened, the dust shield motor is started, and its output end drives the gear 20 to rotate reversely, and the gear two meshing with it rotates forward, and the gear 20 and the gear two each drive a dust shield 3 away from each other; when the dust shield 3 is closed, the dust shield motor is started again, and its output end drives the gear 20 to rotate forward, and the gear two meshing with it rotates reversely, and the gear 20 and the gear two each drive a dust shield 3 closer to each other, which greatly reduces the complexity of the structure. With respect to the production and manufacturing of the device, the optimized structure of this scheme greatly reduces the cost and difficulty of production and manufacturing; the meshing connection between the gear 20 and the gear two increases the synchronization of the movement of the two dust shields 3.

[0071] Example 11: Reference Figure 1-Figure 13 A pipe 21 is installed on one of the dust shield plates 3, and a pipe 2 is installed on the other dust shield plate 3. The end of the pipe 21 is connected and matched with the end of the U-shaped tube 22. The U-shaped tube 22 is installed in the outer shell 1. A pump casing 23 is installed on the U-shaped tube 22. A plurality of blades 24 are installed on the rotating shaft in the pump casing 23. The bottom end of the rotating shaft passes through the bottom of the pump casing 23 and is connected to the power mechanism. The other end of the U-shaped tube 22 is connected to the end of the ash discharge mechanism 25. The other end of the ash discharge mechanism 25 is connected and matched with the second end of the pipe. The ash discharge mechanism 25 is connected to the outer shell 1. The other ends of the pipe 21 and the pipe 2 are both arranged toward the optical module 2.

[0072] The principles and beneficial effects of the above scheme are:

[0073] After use, the optical module 2 itself has an extremely high surface temperature due to long-term work. Long-term and high-frequency use greatly reduces the structural integrity and service life of the optical module 2. Therefore, when the two dust shields 3 are closed, the power mechanism drives the shaft to rotate, and then the blades 24 in the pump housing 23 rotate. Since one end of the U-shaped tube 22 is connected and matched with the end of the pipeline 21, and the other end of the U-shaped tube 22 is connected and matched with the pipeline 2 through the dust discharge mechanism 25, the other ends of the pipeline 21 and the pipeline 2 are both arranged toward the optical module 2. It can be seen that after closing the dust shield 3, the above-mentioned mechanism and the output end of the optical module 2 form an internal air space isolated from the external environment. At this time, the rotating blades 24 cause the air in the internal space to flow. At the same time, the working cooling fan mechanism 10 continuously guides the external air to the inside of the shell 1. Therefore, the U-shaped tube 22 also located in the shell 1 can guide the flowing air to the inside of the shell 1 for heat dissipation. The pipe 21 on the synchronous dust shield 3 can also dissipate heat for the flowing air, which can not only increase the heat dissipation effect, but also avoid the sudden drop in temperature at the output end of the optical module 2, avoid permanent structural deformation of the internal components, and further avoid slight deformation that cannot be detected by using calibration equipment after the structural deformation occurs, and completely avoid the distortion of the image.

[0074] Example 12: Reference Figure 1-Figure 13 The ash discharge mechanism 25 includes: an ash discharge pipe 26, the top of the ash discharge pipe 26 is connected to the bottom of the U-shaped pipe 22, the bottom end of the ash discharge pipe 26 is connected to the ash discharge hole, the ash discharge hole is set on the bottom wall of the shell 1, and the ash discharge pipe 26 is connected to a discharge pipe 27, and a discharge column 28 is slidably sealed in the discharge pipe 27. The discharge hole is set through the discharge column 28, and the discharge hole and the ash discharge pipe 26 axis are staggered. The discharge hole is arranged near the optical module 2, and the end of the discharge column 28 is connected to the end of the push rod 29, and the end of the push rod 29 placed outside the discharge pipe 27 is connected to the end of the telescopic pipe 30, and the telescopic pipe 30 is connected to the end of the spring 2 31 through the mounting ring, and the other end of the spring 2 31 is connected to the other end of the U-shaped pipe 22, and the telescopic pipe 30 is respectively slidably connected to the guide holes of the inner wall of the U-shaped pipe 22 and the side wall of the shell 1, and the end of the telescopic pipe 30 is slidably connected to the other end of the U-shaped pipe 22, and the other end of the telescopic pipe 30 is connected with the pipe 2.

[0075] The other dust shield 3 is provided with a protrusion 32, which is arranged at the lower side of the second pipe and is arranged toward the other end of the telescopic pipe 30;

[0076] A round filter screen 40 is installed at the end of the telescopic pipe 30 . A round hole 3 41 is provided at the lower part of the telescopic pipe 30 . The round hole 3 41 is arranged between the ash discharge pipe 26 and the other end of the U-shaped pipe 22 .

[0077] The principles and beneficial effects of the above scheme are:

[0078] While the circulating air in the U-shaped tube 22 cools down the optical module 2, the dust on the optical module 2 will enter the telescopic pipe 30, and can be collected by the round filter 40 at this time. The excess dust will fall into the telescopic pipe 30 or enter the U-shaped tube 22 through the circular hole 3 41. After the dust shield 3 releases the protection of the optical module 2, a dust shield 3 drives the protrusion 32 to move and squeeze the telescopic pipe 30, the spring 2 31 is compressed, the unloading column 28 and the telescopic pipe 30 move synchronously, and then the circular hole 3 41, the ash discharge pipe 26 and the unloading hole are connected, so as to discharge the dust, thereby improving the device's ability to handle dust autonomously; the dust shield 3 After closing, the protrusion 32 stops squeezing the telescopic pipe 30, and the telescopic pipe 30 is reset and connected to the pipe 2 again under the action of the reset elastic force of the spring 2 31 to prepare for the next work; at the same time, the reset of the telescopic pipe 30 can vibrate the circular filter 40. In this state, the dust remaining on the circular filter 40 can be thoroughly cleaned to avoid the clogging of the circular filter 40 and to prevent the influence of the reduced air pressure after the mechanism starts working. The telescopic pipe 30 is sucked into the U-shaped tube 22 to prevent the telescopic pipe 30 from failing to be connected to the pipe 2 when the mechanism performs the cleaning operation after the device ends its work, and the optical module 2 is contacted with the external environment and contaminated.

[0079] Example 13: Reference Figure 1-Figure 13 The power mechanism includes: a power motor 33, a power motor 33 is installed in the shell 1, and a conical rubber wheel 34 is connected to the output end of the power motor 33. The top diameter of the conical rubber wheel 34 is smaller than its bottom diameter. The side wall of the conical rubber wheel 34 is frictionally matched with the bottom of the spline shaft 35. The top of the spline shaft 35 is plug-fitted with the spline section at the bottom of the rotating shaft. The spline shaft 35 is rotatably connected to the end of the push rod 2 36, and the push rod 2 36 is slidably connected to the longitudinal slide groove. The longitudinal slide groove is opened on the side wall of the lifting tube 37. The bottom wall of the lifting tube 37 is connected to the bottom of the lifting column 39 through the spring 38. The lifting column 39 is slidably connected to the lifting tube 37. The top of the lifting tube 37 is connected to the bottom of the U-shaped tube 22. The spherical top of the lifting column 39 is placed in the U-shaped tube 22 to seal the U-shaped tube 22.

[0080] The principles and beneficial effects of the above scheme are:

[0081] On the basis that the circular filter 40 is thoroughly cleaned, the specific direction of the air flow in the U-shaped tube 22 is that the air in the second pipe enters the telescopic pipe 30, the other end of the U-shaped pipe 22, the pump housing 23, and the end of the U-shaped pipe 22 in turn, and finally cleans and cools the optical module 2 through the pipe 21. When the dust in the telescopic pipe 30 is cleaned or after the dust is cleaned, foreign debris may enter the U-shaped pipe 22. In order to prevent the debris from damaging the optical module 2, after the power motor 33 is started, the friction between the conical rubber wheel 34 and the bottom of the spline shaft 35 drives the rotating shaft and the blade 24 to rotate. The air pressure applied by the flowing air to the spherical top of the lifting column 39 gradually increases, causing its height in the lifting tube 37 to gradually decrease, and the spring three 38 is compressed. The descent of the lifting column 39 drives the push rod The second 36 and the spline shaft 35 rotatably connected thereto descend, and the descent of the spline shaft 35 increases the friction area between its bottom and the side wall of the conical rubber wheel 34, thereby increasing the rotation speed of the spline shaft 35 and the rotating shaft. Since the conical rubber wheel 34 is made of rubber material, it has good friction, especially when the device finishes working and has a certain temperature, the expansion of the conical rubber wheel 34 can keep the rotation of the rotating shaft. After the rotation speed of the shaft increases, the air flow rate in the U-shaped tube 22 increases, and the optical module 2 begins to be cleaned and cooled quickly. Through the implementation of the above-mentioned scheme, the soft start of the mechanism is achieved, and finally it is ensured that the air flow rate in the U-shaped tube 22 increases at a uniform rate. Before the debris causes damage to the output end of the optical module 2, it is collected by the round filter 40 in the telescopic pipe 30, thereby improving the safety of the device during operation.

[0082] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A method for correcting image distortion of a projector, characterized in that: The following steps are involved: Acquiring actual angle parameters of the electronic level on the optical module (2) based on the controller; Based on the comparison between the actual angle parameter of the optical module (2) and the theoretical angle parameter of the optical module (2) by the controller, an adjustment angle of the optical module (2) is obtained; Based on the adjustment angle, a controller is used to start a driving mechanism so that the angle of the optical module (2) is adapted to the adjustment angle; After the angle of the optical module (2) is adapted to the adjustment angle, the distortion of the image is eliminated, and the distortion calibration is completed.

2. The method for correcting image distortion of a projector according to claim 1, characterized in that: When the controller is used to start the driving mechanism so that the angle of the optical module (2) is adapted to the adjustment angle, the controller controls the output end of the motor (4) to drive the swing rod (5) to rotate, thereby making the horizontal angle of the optical module (2) adapted to the horizontal adjustment angle through the lifting adjustment seat (7), and then the controller controls the second output end of the motor to drive the connecting rod (8) to rotate, thereby making the vertical angle of the optical module (2) adapted to the vertical adjustment angle.

3. The method for correcting image distortion of a projector according to claim 1, characterized in that: After eliminating the distortion of the image, the angle parameters of the optical module (2) can continue to be recorded by the electronic level to keep the optical module (2) in a normal working state.

4. The method for correcting image distortion of a projector according to claim 1, characterized in that: The distortion calibration includes multiple times, including: based on the real-time acquisition of the actual angle parameters of the electronic level by the controller, the controller judges the actual angle parameters acquired in real time, and when distortion exists, performs an angle and adjustment angle adaptation; after the adaptation is completed, the actual angle parameters of the electronic level are acquired in real time by the controller again, thereby completing multiple distortion calibrations.

5. A projector image distortion correction device, applicable to a projector image distortion correction method according to any one of claims 1 to 3, characterized in that: include: A housing (1), wherein an optical module (2) is connected to the housing (1), the optical module (2) is connected to an output end of a driving mechanism in the housing (1), the driving mechanism is electrically connected to a controller, the controller is electrically connected to an electronic level, the controller is mounted in the housing (1), and the electronic level is mounted on the optical module (2).

6. The image distortion correction device for a projector according to claim 5, characterized in that: The driving mechanism comprises: a motor (4), wherein the motor (4) is installed in the housing (1), wherein the output end of the motor (4) is connected to the end of a rocker (5), wherein the other end of the rocker (5) is hinged to the bottom of a lifting and adjusting seat (7), wherein a plurality of sliders (6) are installed at the bottom of the lifting and adjusting seat (7), wherein the sliders (6) are interactively connected to an arc-shaped slide rail in the housing (1), wherein the center of the arc-shaped slide rail is located below the motor (4), wherein the output end of the second motor on the lifting and adjusting seat (7) is connected to the bottom end of a connecting rod (8), wherein the top end of the connecting rod (8) is hinged to the top end of the second connecting rod (9), wherein the top end of the second connecting rod (9) is hinged to the optical module (2), and the motor (4) and the second motor are both electrically connected to a controller.

7. The image distortion correction device for a projector according to claim 6, characterized in that: A filter screen (11) is provided on the side wall of the housing (1) away from the optical module (2), a cooling fan mechanism (10) is installed in the housing (1), an output end of the cooling fan mechanism (10) is arranged toward the filter screen (11), and two sealing plates (14) are slidably connected to the side wall of the housing (1) to seal the filter screen (11).

8. The image distortion correction device for a projector according to claim 7, characterized in that: The sealing plate (14) is connected to the end of the adjusting mechanism (12), the adjusting mechanism (12) is installed in the housing (1), the other end of the adjusting mechanism (12) is connected to the second filter screen (13), the side wall of the housing (1) is provided with the third filter screen, and the inner wall of the housing (1) is slidably connected with the second filter screen (13) to seal the third filter screen.

9. The image distortion correction device for a projector according to claim 8, characterized in that: The regulating mechanism (12) comprises: a heat absorbing tube (15), wherein each of the two inner walls of the housing (1) is provided with a heat absorbing tube (15), a piston (16) is slidably sealed inside the heat absorbing tube (15), a guide rod (17) is inserted on the piston (16), the guide rod (17) is slidably sealed with a circular hole and a second circular hole on the heat absorbing tube (15), one end of the guide rod (17) is connected to a sealing plate (14) via a conductive spring (18), the conductive spring (18) is slidably connected in the guide tube, the guide tube is inserted on the inner wall of the housing (1), the other end of the guide rod (17) is connected to the second filter screen (13), nitrogen is injected between one side of the piston (16) and the inner wall of the heat absorbing tube (15), the other side of the piston (16) is connected to the other inner wall of the heat absorbing tube (15) via a spring (19), and the spring (19) is arranged close to the second filter screen (13).

10. The image distortion correction device for a projector according to claim 9, characterized in that: Also includes: A dust shield plate (3) is provided in the mounting hole of the housing (1), a mounting ring is provided in the mounting hole of the housing (1), an annular groove on the inner wall of the mounting ring is rotatably connected to the optical module (2), a dust shield motor is provided in the housing (1), a gear (20) is connected to the end of the dust shield motor extending outside the housing (1), the gear (20) is meshedly connected to gear 2, gear 2 is rotatably connected to the housing (1), and a dust shield plate (3) is connected to the bottom of the gear (20) and gear 2 respectively to protect the output end of the optical module (2).

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