An automatic hexagon correction device and correction method for a projector

Abstract

The present application discloses an automatic hexagonal correction device and correction method for a projector applied to the field of image communication. In this solution, according to the magnitude of the force received by the pressure sensor, the depth of the output barrel screwed into the barrel mounting groove can be determined. The control terminal can fine-tune the emitted light according to the distance between the output lens and the output barrel, facilitating the formation of the best projection effect. After the hexagonal correction is completed, the image input device will capture the corrected image. The processing terminal corrects the black edges within the projection area using a light-shielding lens according to the shape and proportion of the projection image and the projection area. The light-shielding lens will locally generate a shadow under the control of the processing terminal to block the light source emitted by the output lens, correct the projection image, and block the light source of the excess black edges, so that no large-area black edges are generated around the projection image, enhancing the user experience.

Description

Technical Field

[0001] This application relates to the field of image communication, and particularly relates to an automatic hexagon correction device and correction method for a projector. Background Art

[0002] A projector, also known as a projection machine, is a device that can project images or videos onto a screen and can be connected to a computer, VCD, DVD, BD, game console, DV, etc. through different interfaces to play corresponding video signals.

[0003] The hexagon correction method of a projector is developed based on the traditional four-corner correction method. Four-corner correction refers to adjusting the upper left, lower left, upper right, and lower right 4 points of the picture to make the entire picture adjusted to a rectangle, while hexagon correction is adding the left and right tilt directions on the basis of four-corner trapezoid correction. Generally, it is used for automatic trapezoid correction, and the picture becomes square immediately. It is widely used in smart projectors and is deeply loved by users. At the same time, the projector system can also be set for manual trapezoid correction adjustment.

[0004] The existing hexagon correction methods have been relatively mature. Mid- to high-end projectors can complete hexagon correction within 5 seconds, meeting the normal use needs of users. However, during the side projection process of the projector, the projection formed on the projection surface is trapezoidal. Although the six-way correction can compensate for the stretching of the projection surface, a large number of black edges often appear on the projection surface, seriously affecting the user experience. Summary of the Invention

[0005] The purpose of this application is to solve the problem of excessive black edges in the trapezoidal projection screen during the side projection process. Compared with the prior art, it provides an automatic hexagon correction device and correction method for a projector. The projector includes a projector main body, an output module installation groove is opened on the projector main body, an output module is inserted into the output module installation groove, the output module includes an output module main body, a lens barrel installation groove is opened on the output module main body, an output lens is fixedly connected to the bottom plate of the lens barrel installation groove, an output lens barrel is threadedly connected to the opening of the lens barrel installation groove, the output lens barrel includes a lens barrel main body, a light-shielding lens is fixedly connected to the opening of the lens barrel main body close to the output lens, a dust-proof lens is fixedly connected to the opening of the lens barrel main body far from the output lens, a spring piece is connected to one end of the output lens barrel close to the lens barrel installation groove, a pressure sensor is fixedly connected to the end of the spring piece far from the output lens barrel, the pressure sensor is fixedly connected to the side wall of the lens barrel installation groove, a processing terminal is installed in the projector, and the processing terminal is respectively signal-connected to an image input device, a pressure sensor, and a light-shielding lens, and is used to receive the signals of the image input device and the pressure sensor and control the operation of the light-shielding lens;

[0006] This ensures that no large black edges are generated around the projected image, thereby improving the user experience. Optionally, a correction method for an automatic hexagonal correction device for a projector mainly includes the following steps:

[0007] S1, side projection: the projector projects a trapezoidal projection image on the projection area of the projection surface;

[0008] S2. Hexagonal correction: According to the hexagonal correction method of the prior art, the projected image is corrected so that the projected image forms a rectangle within the projection area. The image no longer appears stretched, but a large area of black edges is still retained.

[0009] S3. Black edge correction. After completing step S2, the image input device will capture the corrected image and upload the corresponding image information to the processing terminal installed in the projector. The processing terminal uses a shading lens to correct the black edges in the projection area according to the shape and proportion of the projection image and the projection area. Under the control of the processing terminal, the shading lens will locally produce shadows to block the light source emitted by the output lens, correct the projection image, and block the light source of the excess black edges, so that no large area of black edges will be generated around the projection image.

[0010] Optionally, the outer side of the lens barrel body is fixedly connected with a device located on the outer side of the lens barrel mounting slot, which further facilitates maintenance personnel to unscrew the output lens barrel from the lens barrel mounting slot, thereby facilitating maintenance work for maintenance personnel.

[0011] Optionally, a dust-proof curtain is fixedly connected to the side wall of the lens barrel mounting groove, and the dust-proof curtain includes multiple three-dimensional spiral elastic fibers, and the multiple elastic fibers are intertwined to form a three-dimensional spatial structure. Further, after the output lens barrel is taken out, the dust-proof curtain will automatically restore to block the entrance of the lens barrel mounting groove, so that the lens barrel mounting groove and the output lens are not easily contaminated by dust, and the projection effect of the output lens is not easily affected.

[0012] Optionally, a semi-magnetic ring that matches the position of the dust curtain is fixedly connected to the side wall of the lens barrel mounting groove, and a magnetic coating is coated on one end of the elastic fiber away from itself and the fixed end of the lens barrel mounting groove. Further, after the output lens barrel is pulled out, the dust curtain as a whole will quickly close the entrance of the lens barrel mounting groove under the action of the adsorption force between the magnetic coating and the semi-magnetic ring.

[0013] Optionally, the lengths of multiple elastic fibers are not exactly the same, and the elastic fibers of different lengths are staggered. Furthermore, the elastic fibers with shorter lengths have higher structural strength and are easier to maintain their own shape. A skeleton can be formed inside the dust curtain for the elastic fibers with longer lengths to attach to, making the overall strength of the dust curtain stronger and easier to restore, and covering the entrance of the lens barrel mounting slot.

[0014] Optionally, a through hole matching the lens barrel mounting groove is also drilled at the upper end of the output module body. A negative pressure dust suction pipe is inserted into the through hole. The negative pressure dust suction pipe includes a collection pipe. A wind fan is fixedly connected to the upper end of the collection pipe. Further, after the output module and the output lens barrel are taken out of the projector, the force on the pressure sensor rapidly decreases. At this time, the wind fan starts, and a negative pressure area will be formed at the opening of the through hole located in the lens barrel mounting groove, and dust is easily collected into the negative pressure dust suction pipe, increasing the dust-proof effect of the lens barrel mounting groove.

[0015] Optionally, a magnetic ring and a compression spring are fixedly connected in the lens barrel mounting groove. The compression spring is inserted inside the magnetic ring. A magnetic shoulder ring matching the magnetic ring is fixedly connected to the outer wall of the collection pipe. Further, after the negative pressure dust suction pipe is installed, the adsorption force between the magnetic shoulder ring and the magnetic ring and the elastic force generated by the deformation of the compression spring form a balance, so that the negative pressure dust suction pipe can be stable in the through hole. When it is necessary to take out the negative pressure dust suction pipe for cleaning, just press down the negative pressure dust suction pipe to make the elastic force of the compression spring increase and break the balance. The negative pressure dust suction pipe will pop out locally under the action of the compression spring.

[0016] Optionally, a dust-proof fiber is fixedly connected to the inner wall of the collection pipe. The dust-proof fiber includes a plurality of elastic fibers that intersect with each other. The density of the dust-proof fiber gradually increases from bottom to top. Further, after the dust is sucked into the collection pipe, the dust is easily captured by the dust-proof fiber and is not easily released again, affecting the working environment of the projector.

[0017] Optionally, a partition net matching the collection pipe is fixedly connected to the opening of the collection pipe, and dust is not easily escaped from the upper end of the negative pressure dust suction pipe under the action of the wind fan. Further, the structure of the dust-proof fiber is not easily collapsed and leaked from the collection pipe, and the captured dust is not easily released again.

[0018] Compared with the prior art, the advantages of this application are as follows:

[0019] In this solution, according to the magnitude of the force on the pressure sensor, the depth of the output lens barrel screwed into the lens barrel mounting groove can be determined, and then the distance between the output lens barrel and the output lens can be determined, enabling the control terminal to finely adjust the emitted light according to the distance between the output lens and the output lens barrel, facilitating the formation of the best projection effect. In addition, both the dust-proof lens and the light-shielding lens are flat mirrors, which produce a fixed refraction of the light emitted by the output lens and are not likely to ultimately affect the projection effect. At the same time, after the hexagonal correction is completed, the image input device will capture the corrected picture and upload the corresponding picture information to the processing terminal carried in the projector. The processing terminal corrects the black edges in the projection area using the light-shielding lens according to the shape and proportion of the projection picture and the projection area. The light-shielding lens will locally produce a shadow under the control of the processing terminal to block the light source emitted by the output lens and correct the projection picture, blocking the light source of the excess black edges, so that no large-area black edges are generated around the projection picture, enhancing the user experience.

[0020] In addition, the negative pressure dust suction pipe in this application is an optional structure. When the dust in the user's environment is relatively large, it can be selected to ensure the use effect of the dust-proof curtain. At the same time, the use of the negative pressure dust suction pipe will increase the manufacturing cost of the projector. Therefore, the manufacturing personnel can make a reasonable choice on whether to retain the negative pressure dust suction pipe during the production process according to the actual needs of the user. When the negative pressure dust suction pipe is not retained, there is no need to drill a through hole in the output module. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is an exploded view of the main structure of the projector of this application;

[0022] Figure 2 is Figure 1 a schematic structural view of part A in

[0023] Figure 3 a schematic structural view of the projector of this application;

[0024] Figure 4 is a diagram of the output module of this application;

[0025] Figure 5 T is a side sectional view of the output module of this application;

[0026] Figure 6 is a schematic structural view of the output lens barrel of this application;

[0027] Figure 7 is a side sectional view of the output lens barrel of this application;

[0028] Figure 8 is a schematic structural view of the negative pressure dust suction pipe of this application;

[0029] Figure 9Side sectional view of the negative pressure dust suction pipe of the present application;

[0030] Figure 10 Schematic diagram of the change of the existing hexagonal correction screen;

[0031] Figure 11 Schematic diagram of the change of the hexagonal correction screen of the present application.

[0032] Description of the reference numerals in the figure:

[0033] 1 Projector, 101 Projector main body, 102 Output module installation groove, 2 Output module, 201 Output module main body, 202 Image input device, 203 Lens barrel installation groove, 204 Through hole, 3 Output lens barrel, 301 Lens barrel main body, 302 Dust-proof lens, 303 Light-shielding lens, 4 Output lens, 5 Pressure sensor, 6 Spring ring, 7 Dust-proof curtain, 8 Half magnetic ring, 9 Negative pressure dust suction pipe, 901 Collection pipe, 902 Wind fan, 903 Partition net, 904 Magnetic shoulder ring, 905 Dust-proof fiber, 10 Magnetic ring, 11 Compression spring. Specific implementation mode

[0034] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present application.

[0035] Embodiment 1:

[0036] The present application discloses an automatic hexagonal correction device for a projector. Please refer to Figures 1-7 , which includes a projector 1. The projector 1 includes a projector main body 101. An output module installation groove 102 is formed on the projector main body 101. An output module 2 is inserted into the output module installation groove 102. The output module 2 includes an output module main body 201. A lens barrel installation groove 203 is formed on the output module main body 201. An output lens 4 is fixedly connected to the bottom plate of the lens barrel installation groove 203. An output lens barrel 3 is threadedly connected to the opening of the lens barrel installation groove 203. The output lens barrel 3 includes a lens barrel main body 301. A light-shielding lens 303 is fixedly connected to the opening of the lens barrel main body 301 near the output lens 4. A dust-proof lens 302 is fixedly connected to the opening of the lens barrel main body 301 far from the output lens 4. One end of the output lens barrel 3 close to the lens barrel installation groove 203 is connected to a spring ring 6. One end of the spring ring 6 far from the output lens barrel 3 is fixedly connected to a pressure sensor 5. The pressure sensor 5 is fixedly connected to the side wall of the lens barrel installation groove 203.

[0037] Specifically, a processing terminal is installed in the projector 1 in this solution. The processing terminal is respectively connected to the image input device 202, the pressure sensor 5, and the light-shielding lens 303 in a signal connection manner, and is used to receive the signals of the image input device 202 and the pressure sensor 5, and control the operation of the light-shielding lens 303. In addition, the pressure sensor 5 can determine the depth of the output barrel 3 screwed into the barrel mounting groove 203 according to the magnitude of the force it receives, and then determine the distance between the output barrel 3 and the output lens 4, so that the control terminal can fine-tune the emitted light according to the distance between the output lens 4 and the output barrel 3, facilitating the formation of the best projection effect. In addition, both the dust-proof lens 302 and the light-shielding lens 303 are plane mirrors, which produce a fixed refraction on the light emitted by the output lens 4 and are not likely to ultimately affect the projection effect.

[0038] For the existing hexagonal correction, please refer to Figure 10 , after the projection generated by the side projection of the projector 1 is formed on the projection surface, the projector 1 will perform hexagonal correction on the projection screen according to its own program, so that the largest rectangle is formed on the projection surface, making it difficult for the projection to be stretched significantly and not easily affecting the viewing experience of the user.

[0039] In this application, please refer to Figure 11 , a correction method for an automatic hexagonal correction device of a projector mainly includes the following steps:

[0040] S1. Side projection of the picture: The projector 1 generates a trapezoidal projection picture on the projection area of the projection surface by side projection;

[0041] S2. Hexagonal correction: According to the hexagonal correction method of the existing technology, the projection picture is corrected so that the projection picture forms a rectangle within the projection area and the picture no longer shows a stretching phenomenon, but still retains a large area of black edges;

[0042] S3. Black-edge correction: After step S2 is completed, the image input device 202 will take a picture of the corrected picture and upload the corresponding picture information to the processing terminal installed in the projector 1. The processing terminal corrects the black edges within the projection area by using the light-shielding lens 303 according to the shape and proportion of the projection picture and the projection area. The light-shielding lens 303 will locally generate a shadow under the control of the processing terminal to block the light source emitted by the output lens 4 and correct the projection picture, blocking the light source of the redundant black edges, so that no large area of black edges is generated around the projection picture, improving the user experience. The specific processing method of the processing terminal is tested in advance by the projector manufacturer, and the best black-edge correction data for side projection in different directions is stored in the processing terminal. During the actual black-edge correction process, the picture information input by the image input device 202 is used for comparison to determine the specific side projection angle of the projector 1.

[0043] The outer side of the lens barrel body 301 is fixedly connected with 304, and 304 is located outside the lens barrel mounting groove 203, which is convenient for maintenance personnel to rotate the output lens barrel 3 out of the lens barrel mounting groove 203, thereby facilitating maintenance work for maintenance personnel.

[0044] A dust curtain 7 is fixedly connected to the side wall of the lens barrel mounting groove 203. The dust curtain 7 includes multiple three-dimensional spiral elastic fibers. The multiple elastic fibers are intertwined to form a three-dimensional spatial structure. After the output lens barrel 3 is taken out, the dust curtain 7 will automatically recover and block the entrance of the lens barrel mounting groove 203, so that the inside of the lens barrel mounting groove 203 and the output lens 4 are not easily contaminated by dust, and the projection effect of the output lens 4 is not easily affected. A semi-magnetic ring 8 matching the position of the dust curtain 7 is fixedly connected to the side wall of the lens barrel mounting groove 203, and the elastic fibers are away from themselves and the lens barrel mounting groove 2 03 The magnetic coating is coated on one end of the fixed end. After the output lens barrel 3 is pulled out, the dust-proof curtain 7 as a whole will quickly close the entrance of the lens barrel mounting groove 203 under the action of the adsorption force between the magnetic coating and the semi-magnetic ring 8. The lengths of the multiple elastic fibers are not exactly the same, and the elastic fibers of different lengths are staggered. The elastic fibers with shorter lengths have higher structural strength and are easier to maintain their own shape. A skeleton can be formed in the dust-proof curtain 7 for the attachment of longer elastic fibers, so that the overall strength of the dust-proof curtain 7 is stronger and easier to recover, and the entrance of the lens barrel mounting groove 203 is covered.

[0045] Example 2:

[0046] This application discloses a projector automatic hexagonal correction device, see Figures 1-2 、 Figure 5 and Figures 8-9, a through hole 204 is drilled at the upper end of the output module body 201, and the position of the through hole 204 matches the lens barrel mounting groove 203. A negative pressure dust suction pipe 9 is inserted into the through hole 204. The negative pressure dust suction pipe 9 includes a collection pipe 901. A wind fan 902 is fixedly connected to the upper end of the collection pipe 901. After the output module 2 and the output lens barrel 3 are taken out of the projector 1, the force on the pressure sensor 5 decreases rapidly. At this time, the wind fan 902 starts, and a negative pressure area will be formed at the opening of the through hole 204 located in the lens barrel mounting groove 203, and dust is easily collected into the negative pressure dust suction pipe 9, increasing the dust prevention effect of the lens barrel mounting groove 203. A 10 and an 11 are fixedly connected in the lens barrel mounting groove 203, and the 11 is inserted inside the 10. A magnetic shoulder ring 904 matching the 10 is fixedly connected to the outer wall of the collection pipe 901. After the installation of the negative pressure dust suction pipe 9 is completed, the adsorption force between the magnetic shoulder ring 904 and the 10 and the elastic force generated by the deformation of the 11 form a balance, so that the negative pressure dust suction pipe 9 can be stable in the through hole 204. When it is necessary to take out the negative pressure dust suction pipe 9 for cleaning, only need to press down the negative pressure dust suction pipe 9, so that the elastic force of the 11 becomes larger and the balance is broken. Under the action of the 11, the negative pressure dust suction pipe 9 will partially pop out. A dust-proof fiber 905 is fixedly connected to the inner wall of the collection pipe 901. The dust-proof fiber 905 includes a plurality of intersecting elastic fibers. After the dust is sucked into the collection pipe 901, the dust is easily captured by the dust-proof fiber 905 and is not easily released again, affecting the working environment of the projector 1. The density of the dust-proof fiber 905 gradually increases from bottom to top, and the dust is not easily escaped from the upper end of the negative pressure dust suction pipe 9 under the action of the wind fan 902. A partition net 903 matching itself is fixedly connected to the opening of the collection pipe 901, so that the structure of the dust-proof fiber 905 is not easily collapsed and leaked from the collection pipe 901, and the captured dust is not easily released again.

[0047] Specifically, the negative pressure dust suction pipe 9 in this application is an optional structure. When the dust in the user's environment is relatively large, it can be selected to ensure the use effect of the dust-proof curtain 7. At the same time, the use of the negative pressure dust suction pipe 9 will increase the manufacturing cost of the projector 1. Therefore, the manufacturer can make a reasonable choice on whether to retain the negative pressure dust suction pipe 9 according to the actual needs of the user during the production process. When the negative pressure dust suction pipe 9 is not retained, there is no need to drill a through hole 204 in the output module 2 either.

[0048] Finally, in the accompanying drawings of the description of this application, for the purpose of display, the structures are not drawn strictly in proportion. Those skilled in the art can make reasonable designs on the sizes and positions of the structures according to actual needs. [[ID=८]]

[0049] The above is only a preferred specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed by this application, according to the technical solution of this application and its improved concept, makes equivalent replacements or changes, and should be covered by the protection scope of this application.

Claims

1. An automatic hexagon correction device for a projector, comprising a projector (1), characterized in that, The projector (1) includes a projector main body (101). An output module installation groove (102) is formed on the projector main body (101). An output module (2) is inserted into the output module installation groove (102). The output module (2) includes an output module main body (201). A lens barrel installation groove (203) is formed on the output module main body (201). An output lens (4) is fixedly connected to the bottom plate of the lens barrel installation groove (203). An output lens barrel (3) is threadedly connected to the opening of the lens barrel installation groove (203). The output lens barrel (3) includes a lens barrel main body (301). A light-shielding lens (303) is fixedly connected to the opening at one end of the lens barrel main body (301) close to the output lens (4). A dust-proof lens (302) is fixedly connected to the opening at the other end of the lens barrel main body (301) away from the output lens (4). One end of the output lens barrel (3) close to the lens barrel installation groove (203) is connected to a spring piece (6). One end of the spring piece (6) away from the output lens barrel (3) is fixedly connected to a pressure sensor (5). The pressure sensor (5) is fixedly connected to the side wall of the lens barrel installation groove (203). A processing terminal is carried in the projector (1), and the processing terminal is respectively in signal connection with an image input device (202), the pressure sensor (5), and the light-shielding lens (303), and is used for receiving the signals of the image input device (202) and the pressure sensor (5) and controlling the operation of the light-shielding lens (303); The calibration method of the automatic hexagon calibration device of the projector mainly includes the following steps: S1. Side projection of the picture. The projector (1) projects sidewise to generate a trapezoidal projection picture within the projection area on the projection surface; S2. Hexagon calibration. According to the hexagon calibration method of the prior art, the projection picture is calibrated so that the projection picture forms a rectangle within the projection area and the picture no longer shows a stretching phenomenon, but still has a large area of black edges; S3. Black edge calibration. After step S2 is completed, the image input device (202) will photograph the calibrated picture and upload the corresponding picture information to the processing terminal carried in the projector (1). The processing terminal calibrates the black edges within the projection area by using the light-shielding lens (303) according to the shape and proportion of the projection picture and the projection area. The light-shielding lens (303) will locally generate a shadow under the control of the processing terminal to block the light source emitted by the output lens (4) and correct the projection picture, blocking the light source of the redundant black edges so that no large area of black edges is generated around the projection picture.

2. The automatic hexagon correction device for a projector according to claim 1, characterized in that A dust-proof curtain (7) is fixedly connected to the side wall of the lens barrel installation groove (203). The dust-proof curtain (7) includes a plurality of three-dimensional spiral elastic fibers, and the plurality of elastic fibers intersect with each other to form a three-dimensional space structure.

3. The automatic hexagon calibration device for a projector according to claim 2, wherein A semi-magnetic ring (8) matching the position of the dust-proof curtain (7) is fixedly connected to the side wall of the lens barrel installation groove (203). A magnetic coating is coated on one end of the elastic fiber away from its fixed end with the lens barrel installation groove (203).

4. The automatic hexagon correction device for a projector according to claim 2, characterized in that, The lengths of the plurality of elastic fibers are not completely the same, and the elastic fibers of different lengths are staggered and distributed.

5. The automatic hexagon correction device for a projector according to claim 1, wherein, The upper end of the output module body (201) is further provided with a through hole (204) whose position matches the lens barrel mounting groove (203), and a negative pressure dust suction pipe (9) is inserted into the through hole (204). The negative pressure dust suction pipe (9) includes a collection pipe (901), and the upper end of the collection pipe (901) is fixedly connected to a wind fan (902).

6. The automatic hexagon correction device for a projector according to claim 5, characterized in that, A magnetic ring (10) and a compression spring (11) are fixedly connected in the lens barrel mounting groove (203), the compression spring (11) is inserted into the inner side of the magnetic ring (10), and a magnetic shoulder ring (904) matching the magnetic ring (10) is fixedly connected to the outer wall of the collection tube (901).

7. An automatic hexagon correction device for a projector according to claim 5, characterized in that The inner wall of the collecting tube (901) is fixedly connected with dustproof fibers (905), the dustproof fibers (905) comprising a plurality of elastic fibers interlaced with each other, and the density of the dustproof fibers (905) gradually increases from bottom to top.

8. An automatic hexagon correction device for a projector according to claim 6, characterized in that, A partition net (903) matching the collecting tube (901) is fixedly connected to the opening of the collecting tube (901).

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