Curtain alignment method, projection equipment and storage medium

Abstract

The invention discloses a curtain alignment method, projection equipment and a storage medium, the projection equipment projects a projection picture to a projection curtain, a plurality of alignment points are preset on a frame of the projection curtain, and the plurality of alignment points comprise alignment points distributed at each corner and / or each edge of the frame. Each alignment point has a corresponding projection picture point on the projection picture. The method comprises the following steps: acquiring a projection light irradiation state of the position of a target alignment point; the target alignment point is any alignment point in the plurality of alignment points; aligning the target alignment point with the target projection picture point according to the projection light irradiation state; the target projection picture point is a projection picture point corresponding to the target alignment point on the projection picture.

Description

Technical Field

[0001] The present application relates to the field of projection technology, and in particular to a screen alignment method, a projection device and a storage medium. Background Art

[0002] In the home projection scene, in order to further improve the viewing effect, a common method is to use a matching screen with gain. The common way to adapt the projection image to the screen is to capture the relative position of the screen and the projection through a camera or other device, and passively align the projection image to the screen. This passive method of aligning the entire projection screen as a whole makes the screen alignment less accurate. Summary of the invention

[0003] The present application hopes to provide a screen alignment method, a projection device and a storage medium.

[0004] The technical solution of this application is implemented as follows:

[0005] The present application provides a screen alignment method, wherein the projection device projects a projection picture onto a projection screen, and a plurality of alignment points are preset on a frame of the projection screen, wherein the plurality of alignment points include alignment points distributed at each corner and / or each edge of the frame, and each alignment point has a corresponding projection picture point on the projection picture, and the method comprises: obtaining a projection light irradiation state of a target alignment point; the target alignment point is any alignment point among the plurality of alignment points; according to the projection light irradiation state, aligning the target alignment point with a target projection picture point; the target projection picture point is a projection picture point corresponding to the target alignment point on the projection picture.

[0006] The present application provides a projection device, which projects a projection picture onto a projection screen. A plurality of alignment points are preset on a frame of the projection screen. The plurality of alignment points include alignment points distributed at each corner and / or each edge of the frame. Each alignment point has a corresponding projection picture point on the projection picture, including:

[0007] An acquisition module, used to acquire the projection light irradiation state of a target alignment point; the target alignment point is any alignment point among the multiple alignment points;

[0008] An alignment module is used to align the target alignment point with a target projection picture point according to the projection light irradiation state; the target projection picture point is a projection picture point corresponding to the target alignment point on the projection picture.

[0009] The present application provides a projection device, the projection device comprising: a processor, a memory and a communication bus;

[0010] The communication bus is used to realize the communication connection between the processor and the memory;

[0011] The processor is used to execute the computer program stored in the memory to implement the above-mentioned curtain alignment method.

[0012] The present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores one or more computer programs, and the one or more computer programs can be executed by one or more processors to implement the above-mentioned curtain alignment method.

[0013] The present application provides a screen alignment method, a projection device and a storage medium. The projection device projects a projection picture onto a projection screen. A plurality of alignment points are preset on the frame of the projection screen. The plurality of alignment points include alignment points distributed at each corner and / or each edge of the frame. Each alignment point has a corresponding projection picture point on the projection picture. The method includes: obtaining the projection light illumination state of the target alignment point; the target alignment point is any alignment point among the plurality of alignment points; according to the projection light illumination state, aligning the target alignment point with the target projection picture point; the target projection picture point is the projection picture point corresponding to the target alignment point on the projection picture. The technical solution provided by the present application proposes an active screen alignment method. Through the participation of a plurality of alignment points on the screen frame, multi-point correction is implemented to align the projection picture to the projection screen, thereby improving the accuracy of screen alignment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of a process of a curtain alignment method provided in an embodiment of the present application;

[0015] Figure 2 A schematic diagram of the structure of an exemplary projection area covering projection screen provided in an embodiment of the present application;

[0016] Figure 3 A schematic diagram of an exemplary single-point alignment structure provided in an embodiment of the present application;

[0017] Figure 4 A schematic diagram of an exemplary process of obtaining the projection light illumination state provided in an embodiment of the present application;

[0018] Figure 5 A schematic diagram of an exemplary process of determining whether a projection area covers a projection screen provided in an embodiment of the present application;

[0019] Figure 6 A schematic diagram of an exemplary process of determining edge deformity of a projection image provided in an embodiment of the present application;

[0020] Figure 7A schematic diagram of an exemplary process of determining the deviation between a projection image and a projection screen provided in an embodiment of the present application;

[0021] Figure 8 An exemplary single-point alignment process provided in the embodiment of the present application Figure 1 ;

[0022] Fig. 9 An exemplary single-point alignment process provided in the embodiment of the present application Figure 2 ;

[0023] Fig.10 An exemplary single-point alignment process provided in the embodiment of the present application Figure 3 ;

[0024] Fig.11 An exemplary single-point alignment process provided in the embodiment of the present application Figure 4 ;

[0025] Fig.12 A schematic diagram of an exemplary process of curtain alignment provided in an embodiment of the present application;

[0026] Fig.13 A schematic diagram of a projection device provided in an embodiment of the present application Figure 1 ;

[0027] Fig.14 A schematic diagram of a projection device provided in an embodiment of the present application Figure 2 . DETAILED DESCRIPTION

[0028] The technical solution in the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. It is to be understood that the specific embodiments described herein are only used to explain the related application, rather than to limit the application. It should also be noted that, for ease of description, only the parts related to the related application are shown in the accompanying drawings.

[0029] The embodiment of the present application provides a screen alignment method, which is implemented by a projection device. The projection device projects a projection picture onto a projection screen. A plurality of alignment points are preset on the frame of the projection screen. The plurality of alignment points include alignment points distributed at each corner and / or each edge of the frame. Each alignment point has a corresponding projection picture point on the projection picture, such as Figure 1 As shown, the steps S101 to S102 are included:

[0030] Step S101, obtaining the projection light irradiation state of the target alignment point; the target alignment point is any alignment point among the multiple alignment points.

[0031] In an embodiment of the present application, the projection device is an electronic device with a screen alignment function, and can project a projection picture onto a projection screen.

[0032] For example, Figure 2 As shown in the figure, the middle gray area is the projection screen, and the outer solid line frame is the projection image projected by the projection device. Figure 2 It can be seen that at this time the projection image completely covers the projection screen.

[0033] For example, the plurality of alignment points may include alignment points distributed at respective corners of the frame, such as Figure 3 B, D, F, and H shown in FIG. 1 , and each alignment point has a corresponding projection screen point on the projection screen, such as Figure 3 A, C, G, and E are shown. That is, the projection screen point corresponding to the alignment point B is A; the projection screen point corresponding to the alignment point D is C; the projection screen point corresponding to the alignment point F is G; and the projection screen point corresponding to the alignment point H is E.

[0034] In an embodiment of the present application, the projection device can obtain the projection light irradiation state of the target alignment point, wherein the target alignment point is any alignment point among the multiple alignment points. That is, for each alignment point among the multiple alignment points, the projection light irradiation state of the position thereof can be obtained as the target alignment point.

[0035] Step S102: aligning a target alignment point with a target projection screen point according to a projection light irradiation state; the target projection screen point is a projection screen point corresponding to the target alignment point on the projection screen.

[0036] In an embodiment of the present application, the projection device performs an alignment operation on the target alignment point and its corresponding target projection screen point on the projection screen according to the projection light irradiation state at the target alignment point. An exemplary alignment operation may be to align the target alignment point with the target projection screen point by digital cropping, screen compression, pixel scaling, etc.

[0037] Compared with the technical solution in the prior art that realizes passive alignment of the projection image to the screen by capturing the relative position of the screen and the projection, the active screen alignment method proposed in this application realizes multi-point correction through the active participation of multiple alignment points of the screen frame to align the projection image to the projection screen, thereby improving the accuracy of screen alignment.

[0038] In some embodiments, a light excitation sensor is built into the frame of the projection screen, and the light excitation sensor can move along the frame. The projection device can further include the following steps S401 to S403 when executing the above step S101:

[0039] Step S401: When there is a light excitation sensor at the target alignment point, adjust the receiving angle of the light excitation sensor to the direction of the projection light source.

[0040] In an embodiment of the present application, a light excitation sensor is built into the frame of the projection screen, and the light excitation sensor can be moved along the frame of the projection screen. The light excitation sensor can distinguish whether there is projection light irradiation. If the receiving angle of the light excitation sensor is not facing the direction of the projection light source, it may be interfered by other light sources to affect the projection light irradiation state obtained by the light excitation sensor, resulting in low accuracy. This is particularly obvious in short-focus scenarios, so at this time, it is necessary to adjust the receiving angle of the light excitation sensor to the direction of the projection light source to improve the accuracy of the projection light irradiation state obtained by the light excitation sensor.

[0041] In an embodiment of the present application, when the light excitation sensor is located at the position of the target alignment point, the light excitation sensor can adjust the receiving angle of the light excitation sensor to the direction of the projection light source.

[0042] Exemplarily, there is a light excitation sensor at the location of each of the multiple alignment points, so that there is a light excitation sensor at the target alignment point. Of course, it is also possible that when the screen is aligned, the light excitation sensor happens to be located at the location of the target alignment point.

[0043] Step S402: When there is no light excitation sensor at the target alignment point, control the light excitation sensor to reach the target alignment point along the frame, and adjust the receiving angle of the light excitation sensor to the direction of the projection light source.

[0044] In an embodiment of the present application, since the light excitation sensor can be moved, if there is no light excitation sensor at the current target alignment point, the light excitation sensor can be controlled to move along the frame to the target alignment point. In this way, the receiving angle of the light excitation sensor can be adjusted to the direction of the projection light source.

[0045] For example, if the number of light excitation sensors built into the frame is less than the number of multiple alignment points, then at least two alignment points will share a light excitation sensor. At this time, there may be no light excitation sensor at the target alignment point, and it is necessary to control the light excitation sensor to reach the target alignment point along the frame and adjust the receiving angle of the light excitation sensor to the direction of the projection light source.

[0046] Step S403: Acquire the projection light irradiation state through the light excitation sensor.

[0047] In an embodiment of the present application, the light excitation sensor can communicate with the projection device, obtain the projection light intensity at the target alignment point through the light excitation sensor and then determine the projection light illumination state, and send the projection light illumination state to the projection device. The projection device can then obtain the projection light illumination state of the target alignment point.

[0048] Exemplarily, the light excitation sensor can obtain the projection light intensity at the target alignment point. If the projection light intensity is greater than or equal to the preset projection light intensity threshold, it means that the projection light state at the target alignment point is projection light irradiation (ON state); if the projection light intensity is less than the preset projection light intensity threshold, it means that the projection light state at the target alignment point is no projection light irradiation (OFF state). The preset projection light intensity threshold can be set according to actual conditions and application requirements, and this application does not limit this.

[0049] In some embodiments, the projection device may further perform the following steps S501 to S502:

[0050] Step S501: Determine whether the projection image completely covers the projection screen based on the projection light illumination state.

[0051] In an embodiment of the present application, if the projection light irradiation status at multiple alignment points is that there is projection light irradiation, it means that the projection image completely covers the projection screen; if the projection light irradiation status at multiple alignment points includes alignment points that are not irradiated with projection light, it means that the projection image does not completely cover the projection screen.

[0052] Step S502: When the projection image does not completely cover the projection screen, based on the projection light irradiation state, adjust the projection device so that the projection image completely covers the projection screen.

[0053] In the embodiment of the present application, if the projection image does not completely cover the projection screen, it is necessary to adjust the projection device based on the projection light irradiation state so that the projection image completely covers the projection screen.

[0054] Exemplarily, if the projection image does not completely cover the projection screen, and the projection device can be automatically set, the projection device can automatically set the projection image to completely cover the projection screen; if there is no executable moving mechanism (the projection device cannot be automatically set), the user can be given a voice or screen display prompt to allow manual participation.

[0055] Step S503: When it is detected that the projection image completely covers the projection screen, align the target alignment point with the target projection image point according to the projection light illumination state.

[0056] In the embodiment of the present application, when the projection device initially aligns the projection image with the projection screen, the projection image needs to completely cover the projection screen, that is, the area of ​​the projection image is larger than the area of ​​the projection screen. The relationship between the projection image and the projection screen is shown as follows: Figure 2 and Figure 3 The gray area and solid line area are shown in Figure 2.

[0057] In the embodiment of the present application, since the projection image completely covers the projection screen, the alignment at this time can be performed by using the exemplary alignment method in the above step S102 to align the projection image to the projection screen.

[0058] In some embodiments, the target alignment points are alignment points distributed on each edge of the frame. Before the projection device executes the above step S101, it may further execute step S601:

[0059] Step S601, moving the target projection screen point by a preset pixel in a preset moving direction; the preset moving direction is an outward or inward direction.

[0060] In an embodiment of the present application, the projection device moves the target projection image outward or inward by a preset pixel, wherein the preset pixel can be set according to actual conditions and application requirements, and the present application does not limit this.

[0061] Accordingly, the projection device may further include the following steps S602 to S603 when executing the above step S102:

[0062] Step S602: When the projection light irradiation state is that there is projection light irradiation, determine whether a target edge where the target alignment point is located is deformed.

[0063] In the embodiment of the present application, if the acquired projection light irradiation state still has projection light irradiation after the target projection picture moves inward or outward by a preset pixel, it means that the target projection picture is deformed at the target side.

[0064] Step S603: When the target edge is deformed, align the target alignment point with the target projection screen point according to the projection light illumination state.

[0065] In an embodiment of the present application, if the edge of the target is deformed, the alignment points on the edge of the target will be aligned to avoid the edge of the projection image from being deformed.

[0066] For example, in actual applications, optical machines often have distortion, that is, the edge of the projected image may not be a straight line. Figure 2 and Figure 3It can be seen that the top of the projected image is not a straight line, which is especially common in short-throw projectors. At this time, the alignment points set on each side of the projection screen frame can be used to perform multi-point corrections at the edge of the projection image and the projection screen to achieve screen alignment, thus eliminating the impact of projection distortion.

[0067] An exemplary method of setting the alignment points can be implemented as follows: divide the top edge of the projection screen into 10 equal parts, set 10 alignment points, and then use each alignment point as a target alignment point to align with the projection screen point on the projection screen. The same logic is used for the remaining edges to achieve multi-point screen alignment. Of course, it can also be 5 equal parts, 15 equal parts, or other equal parts. The specific setting can be based on actual conditions and application requirements, and this application does not limit this.

[0068] In some embodiments, the projection device may further perform the following steps S701 to S704:

[0069] Step S701: when the projection light irradiation state is no projection light irradiation and the projection light irradiation state is projection light irradiation after moving outward by a minimum unit step, it is determined that the target projection picture point does not deviate from the target alignment point.

[0070] In an embodiment of the present application, if the projection light irradiation state of the target alignment point is no projection light irradiation, and the projection light irradiation state of the target alignment point does not change after moving outward by the minimum unit step, it means that the target projection picture point does not deviate from the target alignment point.

[0071] Step S702: when the projection light irradiation state is that there is projection light irradiation, determine whether the target projection picture point deviates outward from the target alignment point.

[0072] In an embodiment of the present application, if the projection light irradiation state of the target alignment point is that there is projection light irradiation, it means that the target projection picture point deviates outward from the target alignment point, that is, the target projection picture point deviates from the target alignment point. At this time, the projection device needs to re-execute the alignment operation between the target alignment point and the target projection picture point.

[0073] Step S703: when the projection light irradiation state is no projection light irradiation and the projection light irradiation state is no projection light irradiation after moving outward by the minimum unit step, determine that the target projection picture point deviates inward from the target alignment point.

[0074] In an embodiment of the present application, if the projection light irradiation state is that there is no projection light irradiation, and after moving outward by the minimum unit step, the projection light irradiation state becomes that there is no projection light irradiation, then it means that the target projection picture point deviates inward from the target alignment point, that is, the target projection picture point deviates from the target alignment point. At this time, the projection device needs to re-execute the alignment operation between the target alignment point and the target projection picture point.

[0075] Step S704: when the target projection picture point deviates from the target alignment point, align the target alignment point with the target projection picture point according to the projection light illumination state.

[0076] In an embodiment of the present application, if the target projection picture point deviates from the target alignment point, the target alignment point and the target projection picture point can be aligned according to the projection light irradiation state.

[0077] In some embodiments, the projection device may further include the following steps S801 to S803 when executing the above step S102:

[0078] Step S801, gradually approach the target alignment point with the target projection screen point in a preset moving mode according to the minimum unit step, and obtain the projection light irradiation state after each step of the target projection screen point; the preset moving mode is a mode of alternating horizontal and vertical moving directions.

[0079] In the embodiments of the present application, the preset movement mode may be a horizontal direction first and then a vertical direction, or an alternating movement mode of a vertical direction first and then a horizontal direction. The present application does not limit this.

[0080] In an embodiment of the present application, the projection device moves the target projection screen point gradually close to the target alignment point in a preset moving manner according to the minimum unit step length. For example, Figure 2 and Figure 3 The alignment from point A to point B in the example is discussed in detail. Fig. 9 As shown, the target projection screen point A first approaches the minimum unit step length to the target alignment point B in the horizontal direction, and then obtains the projection light irradiation state of the target alignment point B. If the obtained projection light irradiation state is that there is projection light irradiation, then continue to approach the minimum unit step length to the target alignment point B in the vertical direction, and then judge the projection light irradiation state of the target alignment point B. If the obtained projection light irradiation state is always that there is projection light irradiation, then it is only necessary to gradually approach the target alignment point according to the minimum unit step length in a preset moving manner. Among them, the minimum unit step length can be set according to actual conditions and actual needs, and this application does not limit this.

[0081] Step S802: when the acquired projection light irradiation state is that there is no projection light irradiation, stop the movement of the target projection picture point in the first direction of the current movement, and return to the first position moved to in the previous step.

[0082] In an embodiment of the present application, if the projection light irradiation state is obtained as no projection light irradiation, it means that the target projection picture point has exceeded the target alignment point in the first direction of the current movement. At this time, it is necessary to stop the movement of the target projection picture point in the first direction and return to the first position moved to in the previous step.

[0083] Step S803: Continue to move the target projection picture point from the first position to a second direction different from the first direction until the acquired projection light irradiation state is no projection light irradiation, and stop moving the target projection picture point.

[0084] In the embodiment of the present application, the projection device will continue to move the target projection screen point from the first position to the second direction. If the first direction is horizontal, the second direction at this time is the vertical direction; if the first direction is vertical, the second direction at this time is the horizontal direction. Since the target alignment point has been exceeded in the first direction, it is only necessary to gradually approach in the second direction until the obtained projection light irradiation state is no projection light irradiation, and the movement of the target projection screen point is stopped, indicating that the alignment of the target projection screen point and the target alignment point is completed.

[0085] In some embodiments, the projection device may further include the following steps S1001 to S1004 when executing the above step S102:

[0086] Step S1001, gradually approaching the target projection screen point to the target alignment point in a preset moving mode according to a first preset step length, and obtaining the projection light irradiation state after each step of the target projection screen point; the preset moving mode is a mode of alternating horizontal and vertical moving directions.

[0087] In the embodiment of the present application, the preset movement mode is detailed in the description of the above step S701 and will not be repeated here.

[0088] In an embodiment of the present application, the target projection screen point gradually approaches the target alignment point in a preset moving manner according to a first preset step length. The exemplary first preset step length may be 16 times the minimum unit step length, and of course, may also be 8 times, 32 times, etc. The specific first preset step length may be set according to actual conditions and application requirements, and the present application does not limit this.

[0089] In an embodiment of the present application, the projection device moves the target projection screen point gradually close to the target alignment point in a preset moving manner according to a first preset step length. For example, Figure 2 and Figure 3 The alignment from point A to point B in the example is discussed in detail. Fig.11As shown, the dotted arrow is the return position after the move, the solid arrow is the final move position, and the dotted straight line is the position of the successful move. The target projection screen point A first approaches the target alignment point B in the horizontal direction by a first preset step length, and then obtains the projection light irradiation state of the target alignment point B. If the obtained projection light irradiation state is that there is projection light irradiation, then continue to approach the target alignment point B in the vertical direction by the first preset step length, and then judge the projection light irradiation state of the target alignment point B. If the obtained projection light irradiation state is always that there is projection light irradiation, then it is only necessary to gradually approach the target alignment point in the preset moving mode according to the minimum unit first preset step length.

[0090] Step S1002: when the acquired projection light irradiation state is that there is no projection light irradiation, stop moving the target projection screen point and return to the second position moved to in the previous step.

[0091] In an embodiment of the present application, if the acquired projection light irradiation state is that there is no projection light irradiation, it means that the target projection picture point has exceeded the target alignment point in the current moving direction. At this time, it is necessary to stop the movement of the target projection picture point in the current direction and return to the first position moved to in the previous step.

[0092] Step S1003, reduce the first preset step size to the second preset step size, and continue to gradually approach the target alignment point from the second position in a preset moving manner according to the second preset step size, until the second preset step size is reduced to the minimum unit step size and the acquired projection light irradiation state is no projection light irradiation, stop moving the target projection picture point in the third direction of the current movement, and retreat to the third position moved to in the previous step.

[0093] In the embodiment of the present application, since the first preset step length is often set to be significantly different from the minimum unit step length, if the first preset step length is used as the stop condition in the current moving direction, the error in the alignment of the projection screen will be relatively large. In this case, the first preset step length will be reduced to the second preset step length. Exemplarily, if the first preset step length is 16 times the minimum unit step length, then the second preset step length can be 8 times the minimum unit step length. Then, the target projection screen point continues to gradually approach the target alignment point from the second position in a preset moving manner according to the second preset step length, until the second preset step length is reduced to the minimum unit step length and the obtained projection light irradiation state is that there is no projection light irradiation. At this time, assuming that the current moving direction is the third direction, it means that the movement in the third direction is the most accurate, and there is no need to approach it again. The movement of the target projection screen point in the third direction can be stopped, and it can be returned to the third position moved to in the previous step.

[0094] Step S1004: the target projection screen point is continuously moved from the third position to a fourth direction different from the third direction according to the minimum unit step length until the acquired projection light irradiation state is no projection light irradiation, and the movement is stopped.

[0095] In the embodiment of the present application, the projection device will continue to move the target projection screen point from the third position to the fourth direction. If the third direction is horizontal, the fourth direction is the vertical direction; if the third direction is vertical, the fourth direction is the horizontal direction. Since the third direction has exceeded the target alignment point, it is only necessary to gradually approach the fourth direction with the minimum unit step length until the obtained projection light irradiation state is no projection light irradiation, and stop the movement of the target projection screen point, indicating that the alignment of the target projection screen point and the target alignment point is completed.

[0096] Fig.12 An exemplary process diagram of screen alignment provided in an embodiment of the present application Figure 1 .like Fig.12 As shown, the steps include steps S1201 to S1203:

[0097] Step S1201: when it is detected that the projection image completely covers the projection screen, align the projection image and the projection screen according to the projection light irradiation state of the positions of the multiple alignment points, where the multiple alignment points are the alignment points distributed at the corners of the frame.

[0098] Here, since the screen alignment method uses digital cutting to achieve alignment between the projection image and the projection screen, it is required that the projection image completely covers the projection screen. If the projection image does not completely cover the projection screen, it can be adjusted according to the projection light illumination status of multiple alignment points to ensure that the projection image completely covers the projection screen.

[0099] Here, the multiple alignment points may include alignment points distributed at various corners of the projection frame, so that multi-point alignment can be achieved.

[0100] Step S1202: when it is detected that the edge of the projection picture is deformed, align the projection picture and the projection screen according to the projection light irradiation state of the positions of multiple alignment points, where the multiple alignment points are distributed on the projection frame corresponding to the edge of the deformed projection picture.

[0101] Here, taking into account the distortion of the optical machine in actual situations, that is, the edge of the projected image may not be a straight line, then after the alignment of the corners of the projection frame is achieved, the effect is still poor. In this way, correction can be made through the alignment points set on the projection frame corresponding to the edge of the projection image. While achieving screen alignment, the influence of edge distortion is removed to achieve precise alignment of the projection image and the projection screen.

[0102] For example, Figure 2 and Figure 3 As shown, the upper edge of the projection screen and the upper edge of the screen can be divided into 10 equal parts, with a total of 10 alignment points. The projection image can be aligned to the projection screen using a single-point alignment method. Similar logic can be used for the remaining edges to achieve complete multi-point screen alignment.

[0103] The single-point alignment method is used to align the projection image and the projection screen. Exemplary alignment methods include: Figure 2 and Figure 3 The alignment process from point A to point B in Figure 2 discusses these two methods in detail.

[0104] The first method: Fig. 9 As shown, in the process of aligning point A to point B, the minimum unit step is adopted in the manner of first horizontal and then vertical (or first vertical and then horizontal), and point B is gradually approached. After each unit step, the sensor state is confirmed (the state of projection light irradiation sent by the light excitation sensor at point B, the state with projection light irradiation is ON state, and the state without projection light irradiation is OFF state). If the state of one direction becomes OFF, the step in that direction is retreated, and then the movement in that direction is stopped; when the other direction also becomes OFF, the alignment is completed and the movement is stopped.

[0105] The second method: Fig.11 As shown, the dotted arrow is the retreat position after moving, the solid arrow is the final moving position, and the dotted straight line is the position of successful movement. 1. Point A first moves 16 times the unit step length in the horizontal / vertical direction to point B (16 can also be a larger or smaller multiple, and 16 times is used as an example for discussion here); 2. Confirm the state of the light excitation sensor at this time. If it is ON, continue to move at the current step length. If it is OFF, the pixel retreats to the starting position and reduces the step length by one time, that is, it is 8 times the step length at this time, and continues to move; 3. Repeat step 2 until it is the minimum unit step length at this time, and the state of a certain direction becomes OFF, then retreat the step length in that direction, and then stop moving in that direction; move in the other direction according to the unit step length until the other direction also becomes OFF, then the alignment is completed and the movement stops.

[0106] Step S1203: when the target projection picture point deviates from the target alignment point, align the target alignment point with the target projection picture point according to the projection light irradiation state of the position where the target alignment point is located.

[0107] Here, considering that when used for a long time in a home environment, there may be a slight offset between the projection image and the projection screen due to the loosening and displacement of the fixing platform or the installation device, at this time, the target alignment point can be aligned for the deviated target projection image point.

[0108] Here, the judgment of whether the projection image deviates from the projection screen can include two situations. The first situation: the deviation exceeds the projection screen. At this time, the sensor state is ON, and you can press Fig. 9 The first method shown in the figure executes the single-point alignment logic inward. The second case: the projection screen is deviated and retracted. At this time, the sensor state is OFF. If the sensor is moved outward by one unit step and turns ON, it means that it is just aligned at this time. The unit step can be reduced and the original state can be maintained. If the unit step is moved outward and is still OFF, it means that it is retracted into the inside of the screen. You can follow the steps below. Fig. 9 The first method shown performs single-point alignment logic outward. In the case of deviation, both use Fig. 9 The alignment method shown is based on the consideration that since the alignment has been done beforehand, the offset here is not large, so there is no need to use Fig.11 The fast alignment method shown in the figure can also be used. Of course, since the second method will also reach the minimum unit step size in the end, the results and accuracy are the same, but considering the actual situation, the first method is faster.

[0109] In this way, due to the presence of light-excited sensors in the projection screen, it is possible to monitor whether the current picture has shifted at irregular intervals. When it is found that the projection point (projection picture point) deviates from the edge of the screen (projection screen), it can be realigned. Since the degree of deviation is not large and the correction process is not obvious, an effect similar to seamless real-time alignment can be achieved.

[0110] The embodiment of the present application provides a screen alignment method, wherein the projection device projects a projection picture onto the projection screen, and a plurality of alignment points are preset on the frame of the projection screen, and the plurality of alignment points include alignment points distributed at each corner and / or each edge of the frame, and each alignment point has a corresponding projection picture point on the projection picture, and the method includes: obtaining the projection light illumination state of the target alignment point; the target alignment point is any alignment point among the plurality of alignment points; according to the projection light illumination state, aligning the target alignment point with the target projection picture point; the target projection picture point is the projection picture point corresponding to the target alignment point on the projection picture. The screen alignment method provided by the present application realizes multi-point correction through the active participation of the plurality of alignment points of the screen frame to align the projection picture to the projection screen, thereby improving the accuracy of screen alignment.

[0111] The embodiment of the present application provides a projection device, which projects a projection picture onto a projection screen. A plurality of alignment points are preset on the frame of the projection screen. The plurality of alignment points include alignment points distributed at each corner and / or each edge of the frame. Each alignment point has a corresponding projection picture point on the projection picture, such as Fig.13 As shown, including:

[0112] An acquisition module 1301 is used to acquire the projection light irradiation state of a target alignment point; the target alignment point is any alignment point among the multiple alignment points;

[0113] The alignment module 1302 is used to align the target alignment point with the target projection picture point according to the projection light illumination state; the target projection picture point is the projection picture point corresponding to the target alignment point on the projection picture.

[0114] In one embodiment of the present application, a light excitation sensor is built into the frame of the projection screen, and the light excitation sensor can move along the frame. The acquisition module 1301 is also used to adjust the receiving angle of the light excitation sensor to the direction of the projection light source when there is a light excitation sensor at the target alignment point; when there is no light excitation sensor at the target alignment point, the light excitation sensor is controlled to reach the target alignment point along the frame, and the receiving angle of the light excitation sensor is adjusted to the direction of the projection light source; the projection light irradiation state is acquired through the light excitation sensor.

[0115] In one embodiment of the present application, the alignment module 1302 is also used to determine whether the projection picture completely covers the projection screen based on the projection light illumination state; when the projection picture does not completely cover the projection screen, adjust the projection device based on the projection light illumination state so that the projection picture completely covers the projection screen; when the projection picture completely covers the projection screen, align the target alignment point with the target projection picture point according to the projection light illumination state.

[0116] In one embodiment of the present application, the target alignment points are alignment points distributed on each edge of the frame; the acquisition module 1301 is also used to move the target projection screen point by preset pixels in a preset moving direction; the preset moving direction is an outward or inward direction; the alignment module 1302 is also used to determine whether the target edge where the target alignment point is located is deformed when the projection light irradiation state is that there is projection light irradiation; when the target edge is deformed, the target alignment point and the target projection screen point are aligned according to the projection light irradiation state.

[0117] In one embodiment of the present application, the alignment module 1302 is also used to determine that the target projection picture point does not deviate from the target alignment point when the projection light irradiation state is no projection light irradiation and the projection light irradiation state is with projection light irradiation after moving outward by the minimum unit step; determine that the target projection picture point deviates outward from the target alignment point when the projection light irradiation state is with projection light irradiation; determine that the target projection picture point deviates inward from the target alignment point when the projection light irradiation state is no projection light irradiation and the projection light irradiation state is no projection light irradiation after moving outward by the minimum unit step; when the target projection picture point deviates from the target alignment point, align the target alignment point with the target projection picture point according to the projection light irradiation state.

[0118] In one embodiment of the present application, the alignment module 1302 is also used to gradually approach the target projection picture point to the target alignment point in a preset moving method according to the minimum unit step, and obtain the projection light illumination state after each step of the target projection picture point; the preset moving method is a method of alternating horizontal and vertical moving directions; when the obtained projection light illumination state is that there is no projection light illumination, stop the movement of the target projection picture point in the first direction of the current movement, and retreat to the first position moved to the previous step; continue to move the target projection picture point from the first position to a second direction different from the first direction until the obtained projection light illumination state is that there is no projection light illumination, and stop the movement of the target projection picture point.

[0119] In one embodiment of the present application, the alignment module 1302 is further used to gradually approach the target projection screen point to the target alignment point in a preset moving manner according to a first preset step length, and obtain the projection light irradiation state after each step of the target projection screen point; the preset moving manner is a method of alternating horizontal and vertical moving directions; when the obtained projection light irradiation state is that there is no projection light irradiation, stop the movement of the target projection screen point, and retreat to the second position moved to in the previous step; reduce the first preset step length to a second preset step length, and continue to gradually approach the target projection screen point from the second position in a preset moving manner according to the second preset step length until the second preset step length is reduced to a minimum unit step length and the obtained projection light irradiation state is that there is no projection light irradiation, stop the movement of the target projection screen point in the third direction of the current movement, and retreat to the third position moved to in the previous step; continue to move the target projection screen point from the third position to a fourth direction different from the third direction according to the minimum unit step length until the obtained projection light irradiation state is that there is no projection light irradiation, and stop moving.

[0120] The present application embodiment provides a projection device, such as Fig.14 As shown, the projection device includes: a processor 1401, a memory 1402 and a communication bus 1403;

[0121] A communication bus 1403, used to implement communication connection between the processor 1401 and the memory 1402;

[0122] The processor 1401 is used to execute the computer program stored in the memory 1402 to implement the above-mentioned curtain alignment method.

[0123] The embodiment of the present application provides a projection device, which projects a projection picture onto a projection screen. A plurality of alignment points are preset on the frame of the projection screen. The plurality of alignment points include alignment points distributed at each corner and / or each edge of the frame. Each alignment point has a corresponding projection picture point on the projection picture, and the projection light irradiation state of the target alignment point is obtained; the target alignment point is any alignment point among the plurality of alignment points; according to the projection light irradiation state, the target alignment point is aligned with the target projection picture point; the target projection picture point is the projection picture point corresponding to the target alignment point on the projection picture. The projection device provided by the present application realizes multi-point correction through the active participation of the plurality of alignment points on the frame of the screen, so as to align the projection picture to the projection screen, thereby improving the accuracy of the screen alignment.

[0124] The embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores one or more computer programs, and the one or more computer programs can be executed by one or more processors to implement the above-mentioned curtain alignment method. The computer-readable storage medium can be a volatile memory (volatile memory), such as a random access memory (Random-Access Memory, RAM); or a non-volatile memory (non-volatile memory), such as a read-only memory (Read-Only Memory, ROM), a flash memory (flash memory), a hard disk (Hard Disk Drive, HDD) or a solid-state drive (Solid-State Drive, SSD); or it can be a respective device including one or any combination of the above-mentioned memories, such as a mobile phone, a computer, a tablet device, a personal digital assistant, etc.

[0125] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of hardware embodiments, software embodiments, or embodiments in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) that contain computer-usable program code.

[0126] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0127] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0128] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0129] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A curtain alignment method, characterized in that: Applied to a projection device, the projection device projects a projection picture onto a projection screen, a frame of the projection screen is preset with a plurality of alignment points, the plurality of alignment points include alignment points distributed at each corner and / or each edge of the frame, each alignment point has a corresponding projection picture point on the projection picture, the method includes: Acquire the projection light irradiation state of the target alignment point; the target alignment point is any alignment point among the multiple alignment points; According to the projection light irradiation state, the target alignment point and the target projection picture point are aligned; the target projection picture point is the projection picture point corresponding to the target alignment point on the projection picture.

2. The method according to claim 1, characterized in that The frame of the projection screen is provided with a light excitation sensor, and the light excitation sensor can move along the frame. The step of obtaining the projection light irradiation state at the position of the target alignment point includes: When the light excitation sensor is present at the target alignment point, adjusting the receiving angle of the light excitation sensor to the direction of the projection light source; In the case that the light excitation sensor does not exist at the target alignment point, controlling the light excitation sensor to reach the target alignment point along the frame, and adjusting the receiving angle of the light excitation sensor to the direction of the projection light source; The projection light irradiation state is acquired through the light excitation sensor.

3. The method according to claim 1, characterized in that: The method further comprises: Based on the projection light illumination state, determining whether the projection picture completely covers the projection screen; In the case where the projection picture does not completely cover the projection screen, based on the projection light irradiation state, adjusting the projection device so that the projection picture completely covers the projection screen; When the projection picture completely covers the projection screen, the target alignment point is aligned with the target projection picture point according to the projection light irradiation state.

4. The method according to claim 1, characterized in that: The target alignment points are alignment points distributed on each side of the frame; Before acquiring the projection light irradiation state of the target alignment point, the method further includes: Moving the target projection screen point by a preset pixel in a preset moving direction; the preset moving direction is an outward or inward direction; Correspondingly, aligning the target alignment point with the target projection picture point according to the projection light irradiation state includes: When the projection light irradiation state is that there is projection light irradiation, determining that a target edge where the target alignment point is located is deformed; In the case where the target edge is deformed, the target alignment point is aligned with the target projection picture point according to the projection light irradiation state.

5. The method according to claim 1, characterized in that The method further comprises: When the projection light irradiation state is no projection light irradiation, and when the projection light irradiation state is projection light irradiation after moving outward by a minimum unit step, determining that the target projection picture point does not deviate from the target alignment point; When the projection light irradiation state is that there is projection light irradiation, determining that the target projection picture point deviates outward from the target alignment point; When the projection light irradiation state is no projection light irradiation, and when the projection light irradiation state is no projection light irradiation after moving outward by the minimum unit step, determining that the target projection picture point deviates inwardly from the target alignment point; In a case where the target projection picture point deviates from the target alignment point, the target alignment point is aligned with the target projection picture point according to the projection light irradiation state.

6. The method according to any one of claims 1 to 5, characterized in that: The step of aligning the target alignment point with the target projection picture point according to the projection light irradiation state includes: The target projection screen point is gradually approached to the target alignment point according to the minimum unit step length in a preset moving mode, and the projection light irradiation state is obtained after each step of the target projection screen point; the preset moving mode is a mode of alternating horizontal and vertical moving directions; When the acquired projection light irradiation state is that there is no projection light irradiation, stop the movement of the target projection picture point in the first direction of the current movement, and retreat to the first position moved to in the previous step; The target projection picture point is continuously moved from the first position to a second direction different from the first direction until the acquired projection light irradiation state is no projection light irradiation, and the movement of the target projection picture point is stopped.

7. The method according to any one of claims 1 to 5, characterized in that: The step of aligning the target alignment point with the target projection picture point according to the projection light irradiation state includes: The target projection screen point is gradually approached to the target alignment point in a preset moving manner according to a first preset step length, and the projection light irradiation state is obtained after each step of the target projection screen point; the preset moving manner is a manner of alternating horizontal and vertical moving directions; When the acquired projection light irradiation state is that there is no projection light irradiation, stop moving the target projection screen point and retreat to the second position moved to in the previous step; reducing the first preset step size to a second preset step size, and gradually moving the target projection screen point from the second position to the target alignment point in the preset moving manner according to the second preset step size, until the second preset step size is reduced to a minimum unit step size and the acquired projection light irradiation state is no projection light irradiation, stopping the movement of the target projection screen point in the third direction of the current movement, and retreating to the third position moved to in the previous step; The target projection picture point is moved from the third position to a fourth direction different from the third direction according to the minimum unit step length until the acquired projection light irradiation state is no projection light irradiation, and the movement is stopped.

8. A projection device, characterized in that: The projection device projects a projection picture onto a projection screen, and a plurality of alignment points are preset on a frame of the projection screen. The plurality of alignment points include alignment points distributed at each corner and / or each edge of the frame, and each alignment point has a corresponding projection picture point on the projection picture, including: An acquisition module, used to acquire the projection light irradiation state of a target alignment point; the target alignment point is any alignment point among the multiple alignment points; An alignment module is used to align the target alignment point with a target projection picture point according to the projection light irradiation state; the target projection picture point is a projection picture point corresponding to the target alignment point on the projection picture.

9. A projection device, characterized in that: include: processor, memory, and communications bus; The communication bus is used to realize the communication connection between the processor and the memory; The processor is used to execute the computer program stored in the memory to implement the curtain alignment method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores one or more computer programs, and the one or more computer programs can be executed by one or more processors to implement the curtain alignment method according to any one of claims 1 to 7.

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