Adjustment Method for Projection Screen Clarity and Projection Device

Abstract

The present invention discloses a method for adjusting the clarity of a projection screen and a projection device. The method includes: determining the deflection angle of the projection device, and triggering a focusing instruction when the deflection angle is greater than a first preset value; obtaining deflection information based on the focusing instruction; determining a reference focusing position according to the deflection information; and generating an adjustment instruction according to the reference focusing position to adjust the clarity of the projection screen of the projection device. The present invention realizes focus without a picture by determining the most ideal focusing position through deflection information, effectively solves the problem of unbalanced left and right clarity of the projection screen caused by the deflection of the projection device, and at the same time ensures the continuity of the user's movie viewing because there is no need for focus with a picture.

Description

Technical Field

[0001] The present invention relates to the technical field of smart home, and particularly to a method for adjusting the clarity of a projection image and a projection device. Background Art

[0002] A projector, also known as a projection machine, is a device that can project images, documents, or videos onto a screen or a white wall for display. It can be connected to a computer, VCD (Video Compact Disc), DVD (Digital Versatile Disc), BD (Blu-ray Disc), game console, DV (Digital Video), etc. through different interfaces to play corresponding video signals. It is widely used in homes, offices, schools, and entertainment venues. According to different working methods, there are different types such as LCD (Liquid Crystal Display) and DLP (Digital Light Processing).

[0003] The optical engine is the core component of a projector, which directly affects key parameters such as the brightness and clarity of the projection image. However, for some optical engines, due to problems such as the optical parameters of the optical engine lens and the optical path design, when the projector is offset by a small angle relative to the wall / screen, the left and right clarity of the projection image will be significantly unbalanced, affecting the user's viewing experience.

[0004] In the related art, the method of focusing with an image is usually adopted to deal with the problem of unbalanced left and right clarity of the projection image caused by the deflection of the projector. However, the focusing pattern recognized by focusing with an image is in the middle area or the area adjacent to the middle area of the image, and it cannot take into account the edge area of the projection image, still making it difficult to effectively solve the problem of unbalanced left and right clarity of the projection image. Therefore, how to avoid the unbalanced left and right clarity of the projection image caused by the deflection of the projector is a technical problem that needs to be solved urgently at present. Summary of the Invention

[0005] The main purpose of the present invention is to provide a method for adjusting the clarity of a projection image and a projection device, aiming to solve the technical problem in the prior art of how to avoid the unbalanced left and right clarity of the projection image caused by the deflection of the projector.

[0006] To achieve the above purpose, the present invention provides a method for adjusting the clarity of a projection image, including:

[0007] Determine the deflection angle of the projection device, and trigger a focusing instruction when the deflection angle is greater than a first preset value;

[0008] Obtain deflection information based on the focusing instruction;

[0009] Determine a reference focusing position according to the deflection information;

[0010] Generate an adjustment instruction according to the reference focusing position to adjust the clarity of the projection screen of the projection device.

[0011] Preferably, determining the deflection angle of the projection device includes:

[0012] Determine the deflection angle of the projection device based on an attitude sensing device; or

[0013] Obtain a projection distance based on a ranging module, and determine the deflection angle according to the projection distance.

[0014] Preferably, when the deflection information includes a target projection distance and a target deflection angle, obtaining the deflection information based on the focusing instruction includes:

[0015] If the focusing instruction is triggered based on the attitude sensing device, obtain the target projection distance based on the ranging module, and determine the target deflection angle according to the target projection distance;

[0016] If the focusing instruction is triggered based on the ranging module, determine the target projection distance from the projection distances, and determine the deflection angle determined according to the projection distance as the target deflection angle.

[0017] Preferably, after determining the deflection angle of the projection device, the method includes:

[0018] When the deflection angle is less than or equal to a first preset value, determine a reference focusing position from a preset mapping library according to the axis projection distance of the projection device;

[0019] Wherein, the preset mapping library is a correspondence library between preset projection distances and focusing steps.

[0020] Preferably, when the deflection information includes a target projection distance and a target deflection angle, determining the reference focusing position according to the deflection information includes:

[0021] Calculate a reference projection distance according to the target projection distance and the target deflection angle, and determine the reference focusing position from the preset mapping library according to the reference projection distance;

[0022] Wherein, the preset mapping library is a correspondence between preset projection distances and focusing steps.

[0023] Preferably, when the deflection information includes a target projection distance and a target deflection angle, determining the reference focusing position information according to the deflection information includes:

[0024] Determine the distance interval where the target projection distance is located;

[0025] Determine the angle interval where the target deflection angle is located;

[0026] Determine the reference focus position according to the distance interval and the angle interval.

[0027] Preferably, after generating an adjustment instruction according to the reference focus position to adjust the clarity of the projection screen of the projection device, the method includes:

[0028] When the target deflection angle in the deflection information is greater than a second preset value, obtain the current projection screen;

[0029] Generate a trapezoid correction instruction according to the current projection screen to adjust the shape of the projection screen of the projection device.

[0030] Preferably, before obtaining the deflection information based on the triggered focus instruction, the method includes:

[0031] When receiving a power-on instruction, determine the deflection angle of the projection device to execute the step of triggering a focus instruction when the deflection angle is greater than a first preset value.

[0032] Preferably, before obtaining the deflection information based on the triggered focus instruction, the method includes:

[0033] When receiving a power-on instruction, obtain multiple projection screens with different focus positions;

[0034] Determine the target projection screen with the highest clarity from the multiple projection screens, and determine the initial focus position according to the target projection screen;

[0035] Generate a movement instruction based on the initial focus position to move the projection lens of the projection device to the initial focus position for projection.

[0036] Furthermore, to achieve the above object, the present invention also provides a projection device, including: a memory, a processor, a communication bus, and an adjustment program for the clarity of the projection screen stored on the memory:

[0037] The communication bus is used to realize the connection and communication between the processor and the memory;

[0038] The processor is used to execute the adjustment program for the clarity of the projection screen to implement the steps of the method for adjusting the clarity of the projection screen as described above.

[0039] The adjustment method and projection device for the clarity of the projection screen of the present invention, when a focusing instruction indicating that the projection device is deflected in position and the left and right clarity of the projection screen is unbalanced and refocusing is required is detected, obtains deflection information for reflecting the deflection situation of the projection device, and the obtained deflection information at least includes the deflection angle and the projection distance; furthermore, according to the deflection information, reference focusing position information is determined, and this reference focusing position represents the ideal projection position of the projection device. If the optical engine focuses at this ideal focusing position, the left and right clarity of the projection screen can be restored to balance. Therefore, an adjustment instruction can be generated according to this reference focusing position information to adjust the clarity of the projection screen of the projection device. In this way, the most ideal focusing position is determined through the deflection information to achieve focusing without an image, effectively solving the problem of the unbalanced left and right clarity of the projection screen caused by the deflection of the projection device, and at the same time ensuring the continuity of the user's movie viewing because there is no need for focusing with an image. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic flowchart of the first embodiment of the adjustment method for the clarity of the projection screen of the present invention;

[0041] Figure 2 It is another schematic flowchart of the first embodiment of the adjustment method for the clarity of the projection screen of the present invention;

[0042] Figure 3 It is a schematic diagram of the reference focusing position determination method in the third embodiment of the adjustment method for the clarity of the projection screen of the present invention;

[0043] Figure 4 It is a schematic flowchart of the first of the fourth embodiment of the adjustment method for the clarity of the projection screen of the present invention;

[0044] Figure 5 It is another schematic flowchart of the fourth embodiment of the adjustment method for the clarity of the projection screen of the present invention;

[0045] Figure 6 It is a schematic structural diagram of the hardware operating environment involved in the solution of an embodiment of the projection device of the present invention.

[0046] The implementation, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0047] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0048] The present invention provides an adjustment method for the clarity of a projection screen. Please refer to Figure 1 , Figure 1 It is a schematic flowchart of the solution of the first embodiment of the adjustment method for the clarity of the projection screen of the present invention.

[0049] An embodiment of the present invention provides an embodiment of a method for adjusting the clarity of a projection screen. It should be noted that although the logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than here. Specifically, the method for adjusting the clarity of the projection screen in this embodiment includes:

[0050] Step S10, determine the deflection angle of the projection device, and trigger a focusing instruction when the deflection angle is greater than a first preset value;

[0051] Understandably, a projection device, such as a projector, forms a projection screen when projecting on a curtain or a white wall. The projection screen varies with the projection content, such as the video screen of a projected video, the document screen of a projected document, etc. Regardless of the content projected, the clarity of the projection screen is an important factor affecting the viewing effect of the viewer. However, during the projection process, the projection device may be deflected by external factors, so that the projection device is no longer perpendicular to the projected curtain or white wall, resulting in uneven clarity on the left and right sides of the projection screen and affecting the viewing effect. This embodiment adjusts the clarity of the projection screen to achieve the balance of the clarity displayed at each position of the projection screen.

[0052] Specifically, during the projection process of the projection device, it is detected in real time or at regular intervals whether the projection device is deflected. If it is deflected, the deflection angle of the projection device is determined. Among them, whether it is deflected can be determined in various ways. For example, it is detected whether the projection device moves and deflects through an attitude sensing device, or the projection distance is detected multiple times by a ranging sensor, and it is determined whether the projection device moves and deflects according to whether the projection distances vary each time, or the projection distance is converted into a projection angle, and it is determined whether the projection device moves and deflects from the projection angle.

[0053] Moreover, in order to reflect the severity of the deflection, a first preset value is preset. The first preset value can exist in the form of a numerical range, such as a numerical range from 5° to 15°, or it can directly be a specific value, such as 8°. The deflection angle is compared with the first preset value to determine whether the deflection angle is greater than the first preset value. If it is greater than the first preset value, it means that the deflection angle of the projection device is relatively large, and there may be a situation of unevenness on the left and right of the projection screen. At this time, a focusing instruction is triggered, and the focusing of the projection device is adjusted through the focusing instruction to make the projection screen balanced left and right. Among them, if the first preset value exists in the form of a numerical range, the deflection angle is compared with the lower boundary of the numerical range. For example, for the above 5°, as long as the deflection angle is greater than the lower boundary value, it is determined that the deflection angle is greater than the first preset value.

[0054] Step S20, obtain deflection information based on the focusing instruction;

[0055] Further, after triggering the focusing instruction, deflection information is obtained through a sensor within the projection device. This deflection information is information reflecting the degree of deflection of the projection device, and may include the projection distance from the center point of the projection lens projected onto a screen or a white wall in a certain direction, and the deflection angle indicating the deflection of the projection device.

[0056] Step S30: Determine a reference focusing position according to the deflection information;

[0057] Furthermore, the corresponding relationship between the deflection information value and the focusing position value is determined in advance through experiments. For example, when the deflection information value is within the range a1 to a2, the corresponding focusing position value is m, and the projection screen can be adjusted to have balanced left and right display; when the deflection information value is within the range b1 to b2, the corresponding focusing position value is n, and the projection screen can be adjusted to have balanced left and right display, etc. For the obtained deflection information, find the corresponding deflection information value range, and the focusing position value corresponding to this deflection information value range is the reference focusing position. Adjusting the projection device according to this reference focusing position can adjust the clarity of the projection screen to be balanced left and right.

[0058] Step S40: Generate an adjustment instruction according to the reference focusing position to adjust the clarity of the projection screen of the projection device.

[0059] Further, an adjustment instruction is generated based on the reference focusing position, and the projection lens of the projection device is controlled to move according to this adjustment instruction. The projection screen projected after the projection lens moves according to the adjustment instruction is a screen with balanced left and right clarity.

[0060] Among them, the moving method can be to reset first and then move, or to move directly. For resetting first and then moving, first obtain the current focusing position, then generate a reset instruction according to the current focusing position, and reset the projection lens of the projection device to the initial position through the reset instruction. Thereafter, an adjustment instruction is generated according to the position difference between the reference focusing position and the initial position, and the projection lens is adjusted from the initial position to the reference focusing position through the adjustment instruction to achieve the adjustment of the clarity of the projection screen. For direct movement, after obtaining the current focusing position, directly generate the position difference between the reference focusing position and the current focusing position, and generate an adjustment instruction according to this position difference, and directly adjust the projection lens from the current position to the reference focusing position through the adjustment instruction.

[0061] Understandably, the projection screen of the projection device may be displayed as a trapezoid and requires trapezoid correction. For this, please refer specifically to Figure 2 , after generating the adjustment instruction according to the reference focusing position to adjust the clarity of the projection screen of the projection device, the method includes:

[0062] Step S50: When the target deflection angle in the deflection information is greater than the second preset value, obtain the current projection screen.

[0063] Step S60: Generate a trapezoid correction instruction according to the current projection screen to adjust the shape of the projection screen of the projection device.

[0064] Furthermore, the reason for the trapezoidal display of the projection screen is also that the projection direction of the projection device is not perpendicular to the screen or white wall, and the deflection angle of the projection device is relatively large. Therefore, a second preset value indicating that trapezoid correction is required is preset, and this second preset value is greater than the first preset value. The deflection angle in the deflection information is used as the target deflection angle, and this target deflection angle is compared with the second preset value to determine whether the target deflection angle is greater than the second preset value. If it is greater, it means that the projection device has a relatively large degree of deflection, and the displayed projection screen may be trapezoidal and requires trapezoid correction. At this time, the currently projected screen of the projection device is obtained to get the current projection screen. This current projection screen reflects the displayed trapezoidal shape, and thus the adjustment amount for adjusting from the trapezoidal shape to the normally displayed rectangular shape is known. The adjustment amount is generated into a trapezoid adjustment instruction, and the projection lens is adjusted according to the adjustment instruction. After adjustment, the projection direction is perpendicular to the screen or white wall, so that the projection screen is displayed as a normal rectangle.

[0065] Further understandably, in the process of comparing the deflection angle of the projection device with the first preset value for judgment, there may be a situation where the deflection angle is not greater than the first preset value. At this time, the deflection angle of the projection device is not large, and the reference focus position can be determined according to the axial projection distance of the projection device to adjust the projection device. Specifically, after determining the deflection angle of the projection device, the method includes:

[0066] Step S70: When the deflection angle is less than or equal to the first preset value, determine the reference focus position from the preset mapping library according to the axial projection distance of the projection device.

[0067] Wherein, the preset mapping library is a correspondence library between preset projection distances and focus adjustment steps.

[0068] Furthermore, a preset mapping library is pre-set. In this preset projection library, multiple pairs of correspondences between preset projection distances and focus adjustment steps are pre-set. Among them, the preset projection distance is the axial distance between the lens center and the screen or white wall in the projection direction of the projection device, and the focus adjustment step is the number of steps when the movement of the projection lens is driven by a stepper motor. Different axial distances correspond to different step values, and the step values corresponding to each axial distance are formed into a preset mapping library in the form of a set.

[0069] Further, after determining that the deflection angle is less than or equal to the first preset value, the axial projection distance of the projection device is detected by a sensor in the projection device, that is, the axial distance between the current lens center and the screen or white wall in the projection direction of the projection device. And, the axial projection distance is compared with the preset projection distances in each corresponding relationship of the preset mapping library to determine the preset projection distance that matches the axial projection distance, and then the focusing step corresponding to the preset projection distance is found. The focusing position represented by the focusing step is the reference focusing position. Further, an adjustment instruction is generated based on the reference focusing position, and the projection lens of the projection device is controlled to move and focus with the adjustment instruction to ensure that the projection direction of the projection device is perpendicular to the screen or white wall, making the projection image clearer.

[0070] In this embodiment, when a focusing instruction indicating that the projection device needs to refocus due to the projection image having unbalanced left and right sharpness caused by a position deflection is monitored, deflection information for reflecting the deflection situation of the projection device is obtained. The obtained deflection information includes at least the deflection angle and the projection distance. Further, based on the deflection information, reference focusing position information is determined. The reference focusing position represents the ideal projection position of the projection device. If the optical engine focuses at this ideal focusing position, the projection image can be restored to a state of balanced left and right sharpness. Therefore, an adjustment instruction can be generated according to the reference focusing position information to adjust the sharpness of the projection image of the projection device. In this way, the most ideal focusing position is determined through the deflection information to achieve focus without an image, effectively solving the problem of unbalanced left and right sharpness of the projection image caused by the deflection of the projection device, and at the same time ensuring the continuity of the user's movie viewing because there is no need for focus with an image.

[0071] Further, based on the first embodiment of the method for adjusting the sharpness of the projection image of the present invention, a second embodiment of the method for adjusting the sharpness of the projection image of the present invention is proposed.

[0072] The difference between the second embodiment of the method for adjusting the sharpness of the projection image and the first embodiment of the method for adjusting the sharpness of the projection image is that the determination of the deflection angle of the projection device includes:

[0073] Step S11, determining the deflection angle of the projection device based on an attitude sensing device; or

[0074] Step S12, obtaining the projection distance based on a ranging module and determining the deflection angle according to the projection distance.

[0075] In this embodiment, the determination of the deflection angle of the projection device includes at least two methods. One is that an attitude sensing device is provided in the projection device to detect the deflection angle of the projection device through the attitude sensing device. The other is that a ranging module is provided in the projection device to detect the deflection angle of the projection device through the ranging module.

[0076] Among them, the attitude sensing device may include motion sensors such as a three-axis gyroscope, a three-axis accelerometer, and a three-axis electronic compass. The deflection angle of the projection device is obtained by processing and converting the measured data. The ranging module may be a TOF (Time Of Flight) sensor, which calculates the distance to an object by measuring the "time of flight" of signals such as ultrasonic waves, microwaves, and light between reaching the object and returning. In this embodiment, the ranging module first obtains multiple projection distances of the projection device in multiple directions, and then converts the multiple projection distances into angles based on the relationship of trigonometric functions, that is, the deflection angle of the projection device is obtained.

[0077] Further, the deflection information at least includes a target projection distance and a target deflection angle. Its acquisition is correlated with the deflection angle. Corresponding to the deflection angle being determined in different ways, the deflection information also has at least two ways of acquisition. Specifically, in the case where the deflection information at least includes a target projection distance and a target deflection angle, obtaining the deflection information based on the focusing instruction includes:

[0078] Step S21, if the focusing instruction is triggered based on the attitude sensing device, obtain the target projection distance based on the ranging module, and determine the target deflection angle according to the target projection distance;

[0079] Step S22, if the focusing instruction is triggered based on the ranging module, determine the target projection distance from the projection distances, and determine the deflection angle determined according to the projection distance as the target deflection angle.

[0080] Furthermore, if the deflection angle is detected and determined by the attitude sensing device and triggers the focusing instruction, the detected deflection angle may not be accurate. At this time, the ranging module is used to detect the projection distance of the projection device in the projection direction as the target projection distance, and the projection distances in multiple other directions. Then, the multiple projection distances are converted into the target deflection angle based on the trigonometric function relationship. The target projection distance and the target deflection angle constitute the deflection information.

[0081] Further, if the deflection angle is detected and determined by the ranging module and triggers the focusing instruction, the detected deflection angle is accurate. At this time, directly find out the axial projection distance as the target projection distance from the multiple projection distances of the projection device in multiple directions obtained by the ranging module. At the same time, based on the relationship of trigonometric functions, the multiple projection distances are converted into an angle, that is, the deflection angle is used as the target deflection angle. In this way, the deflection information including the target projection distance and the target deflection angle is obtained.

[0082] In this embodiment, the ranging module accurately obtains the target projection distance and the target deflection angle, which is conducive to the accuracy of determining the reference focusing position. Thus, the most ideal focusing position is determined to achieve focus-free focusing, ensuring the accurate adjustment of the projection device.

[0083] Further, please refer to Figure 3 , and based on the first or second embodiment of the method for adjusting the clarity of the projection screen of the present invention, the third embodiment of the method for adjusting the clarity of the projection screen of the present invention is proposed.

[0084] The difference between the third embodiment of the method for adjusting the clarity of the projection screen and the first or second embodiment of the method for adjusting the clarity of the projection screen is that when the deflection information includes the target projection distance and the target deflection angle, the determining of the reference focusing position according to the deflection information includes:

[0085] Step S31, calculate the reference projection distance according to the target projection distance and the target deflection angle, and determine the reference focusing position from a preset mapping library according to the reference projection distance;

[0086] Wherein, the preset mapping library is the corresponding relationship between the preset projection distance and the focusing steps.

[0087] In this embodiment, the reference focusing position is determined by means of a preset mapping library. Specifically, when the deflection information includes the target projection distance and the target deflection angle measured by the ranging module, the reference projection distance is first calculated based on the target projection distance and the target deflection angle. Specifically, please refer to Figure 3 , Figure 3 . The left diagram in

[0088] Further, compare the reference projection distance of the farthest deflected edge with the preset mapping library to determine the preset projection distance that matches this reference projection distance, and use it as the farthest projection distance; at the same time, compare the reference projection distance of the nearest deflected edge with the preset mapping library to determine the preset projection distance that matches this reference projection distance, and use it as the nearest projection distance. After that, find the focusing step corresponding to the farthest projection distance as the maximum focusing step, and find the focusing step corresponding to the nearest projection distance as the minimum focusing step. Then, perform an averaging process between the maximum focusing step and the minimum focusing step to obtain an average result, and the focusing position represented by this average result is the reference focusing position. Adjusting the projection device based on this reference focusing position can adjust the clarity of the projection screen to be balanced left and right.

[0089] In addition to determining the reference focusing position through the corresponding relationship between the preset projection distance and the focusing step in the preset mapping library, the corresponding relationship between the distance interval, the angle interval, and the focusing position can also be directly set. Specifically, in the case where the deflection information includes the target projection distance and the target deflection angle, determining the reference focusing position information according to the deflection information includes:

[0090] Step S32, determining the distance interval where the target projection distance is located;

[0091] Step S33, determining the angle interval where the target deflection angle is located;

[0092] Step S34, determining the reference focusing position according to the distance interval and the angle interval.

[0093] Further, preset the corresponding relationship between different distance intervals, angle intervals, and focusing step positions. When the deflection information includes the target projection distance and the target deflection angle, compare the target projection distance with each distance interval to determine the distance interval it is in; at the same time, compare the target deflection angle with each angle interval to determine the angle interval it is in. Then, based on the corresponding relationship among the distance interval, the angle interval, and the focusing step position, find the focusing step position corresponding to the determined distance interval and angle interval at the same time, and this focusing step position is the reference focusing position. For example: a1 < target projection distance < a2, and b1 < target deflection angle < b2, the reference focusing position K1 is determined; when a1 < target projection distance < a2, and b3 < target deflection angle < b4, the reference focusing position K2 is determined, etc.

[0094] It should be noted that the corresponding relationship between each distance interval, angle interval, and focusing step position can also be formed into another preset mapping library, and the reference focusing position information can be determined by comparing the target projection distance and the target deflection angle with each corresponding relationship in the preset mapping library.

[0095] In this embodiment, the reference focusing position is determined by the corresponding relationship between multiple preset projection distances and the number of focusing steps, or the corresponding relationship among multiple distance intervals, angle intervals, and the position of the focusing steps. Since each corresponding relationship is determined through experiments, the determined reference focusing position can accurately adjust the clarity of the projection screen.

[0096] Further, please refer to Figure 4 , and based on the first, second, or third embodiment of the method for adjusting the clarity of the projection screen of the present invention, the fourth embodiment of the method for adjusting the clarity of the projection screen of the present invention is proposed.

[0097] The difference between the fourth embodiment of the method for adjusting the clarity of the projection screen and the first, second, or third embodiment of the method for adjusting the clarity of the projection screen is that before obtaining the deflection information based on the triggered focusing instruction, the method includes:

[0098] Step S80, when receiving a power-on instruction, determine the deflection angle of the projection device to execute the step of triggering a focusing instruction when the deflection angle is greater than a first preset value.

[0099] The focusing adjustment method of this embodiment is applicable not only during the use of the projection device but also to the focusing when the projection device is powered on to achieve focusing without an image throughout the process. Specifically, when the projection device receives a power-on instruction, the deflection angle of the projection device is detected by an attitude sensor or a ranging module. Then, it is judged whether the deflection angle is greater than the first preset value. If it is greater than the first preset value, based on the accurate deflection information, the reference focusing position is determined through a preset mapping library or the corresponding relationship among the distance interval, angle interval, and the position of the focusing steps, and the projection lens of the projection device is adjusted to project at this position to achieve the power-on focusing of the projection device. If the deflection angle is not greater than the first preset value, the reference focusing position is determined according to the preset mapping library to adjust the projection lens of the projection device, and the projection lens projects at the adjusted position to achieve the power-on focusing of the projection device.

[0100] Further, in addition to focusing without an image, focusing with an image can also be used for power-on focusing. Specifically, please refer to Figure 5 , and before obtaining the deflection information based on the triggered focusing instruction, the method includes:

[0101] Step S90, when receiving a power-on instruction, obtain multiple projection images at different focusing positions;

[0102] Step S100, determine the target projection image with the highest clarity from the multiple projection images, and determine the initial focusing position according to the target projection image;

[0103] Step S110: Generate a movement instruction based on the initial focusing position to move the projection lens of the projection device to the initial focusing position for projection.

[0104] Furthermore, for picture-based focusing, an imaging unit is provided on the projection device. When the projection device detects a power-on instruction, it gradually moves the projection lens to different focusing positions for projection. During this process, the projection images projected at different focusing positions are acquired through the imaging unit. Then, multiple projection images at different focusing positions are identified, and the ideal focusing position with the best projection effect is determined as the initial focusing position. After that, a movement instruction is generated based on the initial focusing position, and the projection lens of the projection device is controlled to move through this movement instruction to the initial focusing position for projection, realizing the power-on focusing of the projection device.

[0105] The power-on focusing of the projection device in this embodiment can adopt any one of pictureless focusing and picture-based focusing, or can also be compatible with both methods simultaneously to achieve more flexible power-on focusing, which is beneficial for users to choose and use.

[0106] In addition, an embodiment of the present invention also provides a projection device. Refer to Figure 6 , Figure 6 which is a schematic structural diagram of the device hardware operating environment involved in the embodiment solution of the projection device of the present invention.

[0107] As Figure 6 shown, the projection device may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display) and an input unit such as a keyboard (Keyboard). Optionally, the user interface 1003 may further include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a WI-FI interface). The memory 1005 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0108] Those skilled in the art can understand that Figure 6 the hardware structure of the projection device shown in

[0109] does not limit the projection device, and may include more or fewer components than shown, or combine certain components, or have different component arrangements. Figure 6As shown in the figure, the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module, and a program for adjusting the clarity of the projection screen. Among them, the operating system is a program for managing and controlling the projection device and software resources, and supports the operation of the network communication module, the user interface module, the program for adjusting the clarity of the projection screen, and other programs or software; the network communication module is used for managing and controlling the network interface 1004; the user interface module is used for managing and controlling the user interface 1003.

[0110] In Figure 6 In the hardware structure of the projection device shown in the figure, the network interface 1004 is mainly used to connect to the background server and communicate with the background server for data; the user interface 1003 is mainly used to connect to the client (user side) and communicate with the client for data; the processor 1001 can call the program for adjusting the clarity of the projection screen stored in the memory 1005 and perform the following operations:

[0111] Determine the deflection angle of the projection device, and trigger a focusing instruction when the deflection angle is greater than a first preset value;

[0112] Obtain deflection information based on the focusing instruction;

[0113] Determine a reference focusing position according to the deflection information;

[0114] Generate an adjustment instruction according to the reference focusing position to adjust the clarity of the projection screen of the projection device.

[0115] Further, the determining the deflection angle of the projection device includes:

[0116] Determine the deflection angle of the projection device based on an attitude sensing device; or

[0117] Obtain the projection distance based on a ranging module, and determine the deflection angle according to the projection distance.

[0118] Further, in the case where the deflection information includes a target projection distance and a target deflection angle, the obtaining the deflection information based on the focusing instruction includes:

[0119] If the focusing instruction is triggered based on the attitude sensing device, obtain the target projection distance based on the ranging module, and determine the target deflection angle according to the target projection distance;

[0120] If the focusing instruction is triggered based on the ranging module, determine the target projection distance from the projection distances, and determine the deflection angle determined according to the projection distance as the target deflection angle.

[0121] Further, after determining the deflection angle of the projection device, the processor 1001 may call the adjustment program for the projection screen clarity stored in the memory 1005 and perform the following operations:

[0122] When the deflection angle is less than or equal to the first preset value, determine a reference focus position from a preset mapping library according to the axial projection distance of the projection device;

[0123] Wherein, the preset mapping library is a correspondence library between preset projection distances and focus steps.

[0124] Further, in the case where the deflection information includes a target projection distance and a target deflection angle, the determining the reference focus position according to the deflection information includes:

[0125] Calculate a reference projection distance according to the target projection distance and the target deflection angle, and determine the reference focus position from the preset mapping library according to the reference projection distance;

[0126] Wherein, the preset mapping library is a correspondence between preset projection distances and focus steps.

[0127] Further, in the case where the deflection information includes a target projection distance and a target deflection angle, the determining the reference focus position information according to the deflection information includes:

[0128] Determine the distance interval where the target projection distance is located;

[0129] Determine the angle interval where the target deflection angle is located;

[0130] Determine the reference focus position according to the distance interval and the angle interval.

[0131] Further, after generating an adjustment instruction according to the reference focus position to adjust the clarity of the projection screen of the projection device, the processor 1001 may call the adjustment program for the projection screen clarity stored in the memory 1005 and perform the following operations:

[0132] When the target deflection angle in the deflection information is greater than the second preset value, obtain the current projection screen;

[0133] Generate a trapezoid correction instruction according to the current projection screen to adjust the shape of the projection screen of the projection device.

[0134] Further, before obtaining the deflection information based on the triggered focus instruction, the processor 1001 may call the adjustment program for the projection screen clarity stored in the memory 1005 and perform the following operations:

[0135] When a power-on instruction is received, determine the deflection angle of the projection device, and perform the step of triggering a focusing instruction when the deflection angle is greater than a first preset value.

[0136] Further, before obtaining the deflection information based on the triggered focusing instruction, the processor 1001 may call the adjustment program for the clarity of the projection image stored in the memory 1005 and perform the following operations:

[0137] When a power-on instruction is received, obtain multiple projection images at different focusing positions;

[0138] Determine the target projection image with the highest clarity from the multiple projection images, and determine the initial focusing position according to the target projection image;

[0139] Generate a movement instruction based on the initial focusing position to move the projection lens of the projection device to the initial focusing position for projection.

[0140] The specific implementation manner of the projection device of the present invention is basically the same as that of the embodiments of the above method for adjusting the clarity of the projection image, and will not be described in detail here.

[0141] In addition, an embodiment of the present invention further provides a readable storage medium.

[0142] The readable storage medium stores an adjustment program for the clarity of the projection image. When the adjustment program for the clarity of the projection image is executed by a processor, the steps of the above method for adjusting the clarity of the projection image are implemented.

[0143] The readable storage medium of the present invention may be a computer-readable storage medium. The specific implementation manner thereof is basically the same as that of the embodiments of the above method for adjusting the clarity of the projection image, and will not be described in detail here.

[0144] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. However, the present invention is not limited to the above specific implementation manners. The above specific implementation manners are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the spirit and scope protected by the claims of the present invention. All equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, all fall within the protection scope of the present invention.

Claims

1. A method for adjusting the clarity of a projection screen, characterized in that, it includes: Determine the deflection angle of the projection device, and trigger a focusing instruction when the deflection angle is greater than a first preset value; Based on the focusing instruction, obtain deflection information, where the deflection information includes a target projection distance and a target deflection angle; According to the deflection information, determine a reference focusing position, including: Calculate a reference projection distance according to the target projection distance and the target deflection angle. The reference projection distance includes the reference projection distance of the farthest deflected edge and the reference projection distance of the nearest deflected edge. Compare the reference projection distance of the farthest deflected edge with a preset mapping library to determine the farthest projection distance and the corresponding maximum focusing steps, and compare the reference projection distance of the nearest deflected edge with the preset mapping library to determine the nearest projection distance and the corresponding minimum focusing steps; wherein, the preset mapping library is the corresponding relationship between the preset projection distance and the focusing steps; perform an averaging process between the maximum focusing steps and the minimum focusing steps to obtain the reference focusing position; generate an adjustment instruction according to the reference focusing position to adjust the clarity of the projection screen of the projection device.

2. The method for adjusting the clarity of a projection screen according to claim 1, characterized in that, the determination of the deflection angle of the projection device includes: Determine the deflection angle of the projection device based on an attitude sensing device; or Obtain the projection distance based on a ranging module, and determine the deflection angle according to the projection distance.

3. The method for adjusting the clarity of a projection screen according to claim 2, characterized in that, in the case where the deflection information includes a target projection distance and a target deflection angle, the obtaining of the deflection information based on the focusing instruction includes: If the focusing instruction is triggered based on the attitude sensing device, obtain the target projection distance based on the ranging module, and determine the target deflection angle according to the target projection distance; If the focusing instruction is triggered based on the ranging module, determine the target projection distance from the projection distances, and determine the deflection angle determined according to the projection distance as the target deflection angle.

4. The method for adjusting the clarity of a projection screen according to claim 1, characterized in that, after determining the deflection angle of the projection device, the method includes: When the deflection angle is less than or equal to the first preset value, determine the reference focusing position from a preset mapping library according to the axial projection distance of the projection device; wherein, the preset mapping library is a corresponding relationship library between the preset projection distance and the focusing steps.

5. The method for adjusting the clarity of a projection screen according to claim 1, characterized in that, in the case where the deflection information includes a target projection distance and a target deflection angle, the determination of the reference focusing position information according to the deflection information includes: Determine the distance interval where the target projection distance is located; Determine the angle interval where the target deflection angle is located; Determine the reference focusing position according to the distance interval and the angle interval.

6. The method for adjusting the clarity of a projection screen according to any one of claims 1 to 5, characterized in that, After generating an adjustment instruction according to the reference focus position to adjust the clarity of the projection screen of the projection device, the method includes: When the target deflection angle in the deflection information is greater than a second preset value, obtain the current projection screen; Generate a trapezoid correction instruction according to the current projection screen to adjust the shape of the projection screen of the projection device.

7. The method for adjusting the clarity of the projection screen according to any one of claims 1 to 5, Characterized in that, Before obtaining the deflection information based on the focusing instruction, the method includes: When a power-on instruction is received, determine the deflection angle of the projection device to perform the step of triggering a focusing instruction when the deflection angle is greater than a first preset value.

8. The method for adjusting the clarity of the projection screen according to any one of claims 1 to 5, Characterized in that, Before obtaining the deflection information based on the focusing instruction, the method includes: When a power-on instruction is received, obtain multiple projection screens with different focus positions; Determine the target projection screen with the highest clarity from the multiple projection screens, and determine the initial focus position according to the target projection screen; Generate a movement instruction based on the initial focus position to move the projection lens of the projection device to the initial focus position for projection.

9. A projection device, Characterized in that, Comprising: A memory, a processor, a communication bus, and an adjustment program for the clarity of the projection screen stored on the memory: The communication bus is used to realize the connection communication between the processor and the memory; The processor is used to execute the adjustment program for the clarity of the projection screen to implement the steps of the method for adjusting the clarity of the projection screen according to any one of claims 1-8.

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