Projection method and device, electronic equipment and storage medium

Abstract

The invention provides a projection method applied to projection equipment, and the projection method comprises the steps: adjusting the distance between an optical lens and a display chip; when the definition of the central area in the projection picture of the projection equipment meets a first preset condition, stopping adjusting the distance between the optical lens and the display chip; adjusting the included angle between the optical axis of the optical lens and the display chip, and stopping adjusting the included angle between the optical axis of the optical lens and the display chip under the condition that the global definition of the projection picture of the projection equipment meets a second preset condition to obtain a target included angle; and performing projection based on the distance and the target included angle to obtain a target projection picture. The included angle between the optical axis of the optical lens and the display chip is adjusted in a feedback mode to realize automatic definition accurate correction and accurate compensation of the projection equipment, so that the projection efficiency and the global definition of the projection equipment are improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of projection technology, and relate to but are not limited to a projection method, device, electronic device and storage medium. Background Art

[0002] As a display device, projection equipment has the advantages of small size, easy placement, and large screen size. It is widely used in home, industrial and other fields. The optical path of existing projection equipment is often designed to achieve the best clarity display effect when it is projected frontally. However, in real life, it is often necessary to place it not directly facing the projection target display position due to environmental restrictions. When the projection is side-projected, there is a certain difference in the display distance between different areas of the projection screen, resulting in the global clarity of the projected screen is not high during side projection and the projection effect is poor.

[0003] In order to solve the problem of low global clarity and poor effect of side projection, the existing technology improves the clarity of the projected image by increasing the complexity of the optical structure and adding lenses. However, the existing technology can only guarantee the clarity of some areas in the projected image, and cannot improve the global clarity of the projected image. Therefore, how to improve the clarity of each area in the side projection image and achieve better global clarity of the side projection image is an urgent problem to be solved. Summary of the invention

[0004] The present application provides a projection method, device, electronic device and storage medium.

[0005] The technical solution of this application is implemented as follows:

[0006] The present application provides a projection method, the projection method comprising:

[0007] Adjusting the distance between the optical lens and the display chip; when the clarity of the central area in the projection picture of the projection device meets the first preset condition, stopping adjusting the distance between the optical lens and the display chip;

[0008] adjusting the angle between the optical axis of the optical lens and the display chip, and stopping adjusting the angle between the optical axis of the optical lens and the display chip when the global clarity of the projection picture of the projection device meets the second preset condition to obtain a target angle;

[0009] Projection is performed based on the distance and the target angle to obtain a target projection picture.

[0010] The present application provides a projection device, the projection device comprising:

[0011] an adjusting unit, configured to adjust the distance between the optical lens and the display chip; and stop adjusting the distance between the optical lens and the display chip when the clarity of the central area in the projection picture of the projection device meets a first preset condition;

[0012] The adjustment unit is further used to adjust the angle between the optical axis of the optical lens and the display chip, and when the global clarity of the projection picture of the projection device meets the second preset condition, stop adjusting the angle between the optical axis of the optical lens and the display chip to obtain a target angle;

[0013] The projection unit is used to perform projection based on the distance and the target angle to obtain a target projection picture.

[0014] The present application provides an electronic device, comprising: a memory for storing executable instructions; and a processor for implementing the above-mentioned projection method when executing the executable instructions stored in the memory.

[0015] The present application provides a computer-readable storage medium storing executable instructions for causing a processor to execute the executable instructions to implement the above-mentioned projection method.

[0016] The projection method provided by the present application uses an adjustable optical lens and / or display chip to adjust the distance between the optical lens and the display chip, as well as the angle between the optical axis of the optical lens and the display chip. When the clarity of the central area of ​​the projection picture meets a first preset condition, the distance between the optical lens and the display chip is stopped from being adjusted. In the process of adjusting the angle, the angle between the optical lens and the display chip is continuously adjusted according to the feedback of the adjusted global clarity. When the global clarity meets a second preset condition, the angle between the optical axis of the optical lens and the display chip is stopped from being adjusted to obtain a target angle. Projection is performed according to the distance between the optical lens and the display chip and the target angle to obtain a target projection picture. In this way, the physical method of the adjustable optical lens and / or display chip is utilized to adjust the distance between the optical lens and the display chip, as well as the angle between the optical axis of the optical lens and the display chip. Combined with the feedback of the global clarity of the projected image, the angle between the optical axis of the optical lens and the display chip is automatically adjusted, so that the clarity of each area of ​​the projected image is improved evenly, and the projection device can intelligently adjust the global clarity of the projection image. Moreover, after adjusting the distance between the optical lens and the display chip, the angle between the optical axis of the optical lens and the display chip is adjusted by feedback to realize automatic clarity correction and compensation when the projection device is side-projected, which can achieve accurate correction of the clarity of the projected image, thereby improving the projection efficiency and global clarity of the projection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1An optical schematic diagram of a projection device provided in an embodiment of the present application;

[0018] Figure 2 A projection method process provided in the embodiment of the present application Figure 1 ;

[0019] Figure 3 A projection method process provided in the embodiment of the present application Figure 2 ;

[0020] Figure 4 A projection method process provided in the embodiment of the present application Figure 3 ;

[0021] Figure 5 A projection method process provided in the embodiment of the present application Figure 4 ;

[0022] Figure 6 A projection method process provided in the embodiment of the present application Figure 5 ;

[0023] Figure 7 A projection method process provided in the embodiment of the present application Figure 6 ;

[0024] Figure 8 A schematic diagram of the structure of a projection device provided in an embodiment of the present application;

[0025] Fig. 9 A schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. The described embodiments should not be regarded as limiting the present application. All other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of this application.

[0027] In the following description, reference is made to "some embodiments", which describe a subset of all possible embodiments, but it is understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict. Unless otherwise defined, all technical and scientific terms used in the embodiments of the present application have the same meaning as those commonly understood by those skilled in the art of the technical field of the embodiments of the present application. The terms used in the embodiments of the present application are only for the purpose of describing the embodiments of the present application and are not intended to limit the present application.

[0028] At present, when the existing projection equipment is used for side projection, there is a certain difference in the distance between the projection equipment and different areas of the projection screen, which leads to the problem that the global clarity of the projection screen is not high and the projection effect is poor. Therefore, the projection distance from the projection equipment to the center of each area in the projection surface corresponds to a different optimal focal length. Only when each projection distance corresponds to the optimal focal length can each area of ​​the projection screen display a clear picture, such as Figure 1 As shown, Figure 1 This is the optical schematic diagram of the projection equipment. Figure 1 Characterizes the correspondence between the projection distance from the projection device to the projection surface and the optimal focal length corresponding to the optimal resolution (clarity), where: Figure 1 The horizontal axis is the projection distance from the projection device to the projection surface, and the vertical axis is the optimal focal length corresponding to each projection distance. The optimal focal length refers to the focal length at which the image source in the projection device can be clearly displayed. Figure 1 The curve in the figure is the corresponding relationship between the projection distance and the optimal focal length of the ideal projection device. Therefore, when side projection is used, the projection distance from the projection device to the projection surface should be as close as possible to the projection distance of the projection device. Figure 1 The curves in coincide with each other, such as Figure 1 The shaded curve segments in . Figure 1 The shaded vertical line in the figure is the depth of field of the optical lens. Here, the depth of field is the distance range of the object in front and behind the lens or other imager that can obtain a clear image. In layman's terms, the scene at the focus point plane of the photographed object will form a clear image on the film. There is a range from somewhere in front of the focus point plane to somewhere behind it, and the scene within it can form a clear image. This range is called the depth of field. Figure 1 It can be seen that the conventional projection optical lens cannot fully cover the clearest position when side projection is used.

[0029] Existing projection equipment includes digital light processing (DLP) projection and liquid crystal display (LCD) projection. Since the focal length of the overall optical machine of DLP is small and the depth of field is large, but the image surface of DLP is small, a larger magnification is required to achieve the same projection ratio of the projection optical machine. Since the image surface of LCD projection equipment is large, the focal length is large and the depth of field is shallow when achieving the same projection ratio. The optical path design of existing projection equipment is to achieve the best clarity display effect when projecting frontally. In real life, due to the limitation of the projection environment, side projection is required, resulting in the problem that the global clarity of the projected picture is not high and the projection effect is poor when projecting sideways.

[0030] Based on the defects of existing projection equipment, in order to solve the problem that the global clarity of the projected image is high but the effect is poor when projecting from the side, the existing technology improves the clarity of the projected image by increasing the complexity of the optical structure, adding lenses, etc. However, the existing technology can only guarantee the clarity of some areas of the projected image, and cannot improve the clarity of each area of ​​the projected image, thereby failing to achieve global clarity improvement. In addition, the existing technology increases the complexity of the optical structure in the optical lens or adds lenses, which invisibly increases the cost of the projection equipment.

[0031] Based on the above-mentioned related issues, an embodiment of the present application provides a projection method, which uses an adjustable optical lens and / or display chip to adjust the distance between the optical axis of the optical lens and the display chip, and adjusts the angle between the optical axis of the optical lens and the display chip. When the clarity of the central area of ​​the projection picture meets the first preset condition, the adjustment of the distance between the optical lens and the display chip is stopped. In the process of adjusting the angle, the angle between the optical lens and the display chip is continuously adjusted according to the feedback of the adjusted global clarity until the global clarity meets the second preset condition. Then, the adjustment of the angle between the optical axis of the optical lens and the display chip is stopped to obtain the target angle, and projection is performed according to the distance between the optical lens and the display chip and the target angle to obtain the target projection picture. In this way, the physical method of the optical lens and / or display chip with adjustable direction is utilized to adjust the distance between the optical lens and the display chip, as well as the angle between the optical axis of the optical lens and the display chip, and combined with the global clarity feedback of the projected image, the angle between the optical axis of the optical lens and the display chip is automatically adjusted, so that the clarity of each area of ​​the projected image is evenly improved, and the projection device can intelligently adjust the global clarity of the projection image. Moreover, after adjusting the distance between the optical lens and the display chip, the angle between the optical axis of the optical lens and the display chip is adjusted by feedback to realize automatic clarity correction and compensation when the projection device is side-projected, which can achieve accurate correction of the clarity of the projected image, thereby improving the projection efficiency and global clarity of the projection device.

[0032] In the embodiments of the present application, the projection method is applicable to any projection device, including but not limited to liquid crystal display (LCD), digital light processor (DLP), cathode ray tube (CRT) and liquid crystal on silicon (LCOS) projectors. The projection device can also be a mobile device (for example, a mobile phone, a satellite phone, a portable projection player, a personal digital assistant, a dedicated projection device, a portable projection device), a laptop computer, a tablet computer, a desktop computer, a smart watch, and other terminals with projection function.

[0033] In the embodiments of the present application, Figure 2 As shown, Figure 2 This is a projection method process provided by the embodiment of the present application Figure 1 , the projection method includes:

[0034] Step S210: adjusting the distance between the optical lens and the display chip; when the clarity of the central area in the projection image of the projection device meets the first preset condition, stop adjusting the distance between the optical lens and the display chip.

[0035] In the embodiments of the present application, the optical lens of the projection device is a device used for imaging, and most of them are convex lenses. The optical lens is divided into short-focus, medium-focus and long-focus according to the installation distance of the projection device and the size of the playback screen. Among them, short-focus is used for laser TVs, museums, science and technology museums and other spaces with relatively small installation distances; medium-focus is used for school classrooms, conference rooms, auditoriums, etc.; long-focus is used for architectural projection, theaters, stadiums, etc. The embodiments of the present application do not specifically limit the focal length of the optical lens.

[0036] In the embodiment of the present application, the display chip refers to the plane where the image source, i.e. the projected image, is located in the projection device, wherein the image on the display chip is refracted by the optical lens and projected. In general projection devices, the plane where the display chip is located will emit light, such as a digital micromirror device (DMD) chip, and the embodiment of the present application does not specifically limit this.

[0037] In the embodiments of the present application, the optical lens and the display chip may exist separately in two components, or may be integrated in the same component. For example, the component composed of the optical lens and the display chip may be used as an adjustable optical machine in the present application, and the embodiments of the present application do not make any specific limitations on this.

[0038] In the embodiments of the present application, the projection screen refers to the screen obtained by projecting the projection image. The projection device perceives the picture clarity in real time through the projection screen. The projection screen here can be collected by the camera built into the projection device, or it can be collected by a separate collection device and then transmitted to the projection device. The collection device includes but is not limited to mobile phones, computers, cameras, smart watches with camera functions, and other devices with camera functions. The embodiments of the present application do not specifically limit the collection of the projection screen.

[0039] In an embodiment of the present application, the central area in the projection screen can be an image area with a preset length from the center point of the projection screen. For example, if the projection screen is a rectangle, the central area is an image area with a preset length from the center point of the rectangle; if the projection screen is a circle, the central area is an image area with a preset length from the center of the circle, wherein the preset length is less than the distance from the midpoint to the edge of the projection screen.

[0040] In the embodiment of the present application, the clarity of the central area refers to the overall clarity of the central area of ​​the projection picture. It should be understood that the clarity of the central area satisfies the first preset condition. The preset condition may be that only the central area of ​​the projection picture has a high clarity, and the clarity of other areas of the projection picture except the central area is lower. It may also be that only the clarity of the central area of ​​the projection picture is greater than the clarity threshold. The embodiment of the present application does not make specific restrictions.

[0041] In the embodiment of the present application, the first preset condition may be greater than a clarity threshold, or the clarity of the central area of ​​the projection image may be higher than that of other areas. The embodiment of the present application does not specifically limit the first preset condition.

[0042] In the embodiment of the present application, when adjusting the distance between the optical lens and the display chip, the optical lens may be adjusted, the display chip may be adjusted, or the optical lens and the display chip may be adjusted at the same time, which is not specifically limited in the embodiment of the present application.

[0043] In an embodiment of the present application, adjusting the distance between the optical lens and the display chip is essentially performing a focusing process on the optical lens. The focusing process is to change the distance from the display chip to the center of the lens by moving the lens or the display chip in the optical lens forward and backward. In the process of adjusting the distance between the optical lens and the display chip, when the central area of ​​the projection picture meets the first preset condition, the adjustment of the distance between the optical lens and the display chip is stopped, so that the central area of ​​the projection picture is at the optimal focal length position, thereby obtaining a clear central area of ​​the projection picture.

[0044] In the embodiment of the present application, focusing is focusing. The focusing process can move the lens in the optical lens forward and backward, and can also move the display chip forward and backward to change the distance from the display chip to the optical lens, so that the central area of ​​the projected image is at the optimal focal length position. The embodiment of the present application does not make specific limitations on this.

[0045] Step S220: adjusting the angle between the optical axis of the optical lens and the display chip, and when the global clarity of the projection image of the projection device meets the second preset condition, stopping adjusting the angle between the optical axis of the optical lens and the display chip to obtain a target angle.

[0046] In the embodiment of the present application, the global clarity of the projection picture refers to the overall clarity of the entire area of ​​the projection picture. The global clarity of the projection picture is an important indicator for measuring the overall picture quality of the projection picture. The global clarity here may include the clarity of multiple areas in the projection picture, or it may be a value obtained by using the clarity of multiple areas in the projection picture. The embodiment of the present application does not impose any specific restrictions on the global clarity.

[0047] In the embodiment of the present application, both the optical lens and the display chip can be adjusted in direction, and the optical lens and / or the display chip can be adjusted by determining the adjustment direction of the optical lens and / or the display chip. The adjustment direction of the optical lens of the projection device can be determined only, or the adjustment direction of the display chip can be determined only, or both the adjustment directions of the optical lens and the display chip can be determined at the same time, and the embodiment of the present application does not specifically limit this.

[0048] In an embodiment of the present application, when adjusting the angle between the optical axis of the optical lens and the display chip, it can be a preset step adjustment set in advance or a random adjustment. The preset step refers to the degree of the angle between the optical axis of the optical lens and the display chip each time it is rotated, which is set in advance during the design stage of the projection equipment. The preset step can be obtained based on experience or determined through multiple experiments. The embodiment of the present application does not specifically limit the setting of the preset step.

[0049] In the embodiment of the present application, the method for adjusting the angle between the optical axis of the optical lens and the display chip includes but is not limited to using a driving motor to control the rotation of the optical lens and / or the display chip. The driving motor may also be used to control the deformation of a spring to drive the optical lens and / or the display chip to rotate. The embodiment of the present application does not specifically limit the method for adjusting the angle between the optical axis of the optical lens and the display chip.

[0050] In an embodiment of the present application, the second preset condition can be set for a threshold value of the global clarity of a projection screen, or can be set for a change trend of the global clarity of multiple projection screens, or can be a projection screen with the highest global clarity among multiple projection screens. The embodiment of the present application does not specifically limit the second preset condition.

[0051] It should be understood that if the adjustment direction of the optical lens of the projection device is determined, the optical lens is rotated according to the adjustment direction of the optical lens to adjust the angle between the optical axis of the optical lens and the display chip; if the adjustment direction of the display chip is determined, the display chip is rotated according to the adjustment direction of the display chip to adjust the angle between the optical axis of the optical lens and the display chip; if the adjustment directions of the optical lens and the display chip are determined, the optical lens and the display chip are rotated according to the adjustment directions of the optical lens and the display chip to adjust the angle between the optical axis of the optical lens and the display chip.

[0052] In an embodiment of the present application, the angle between the optical axis of the optical lens and the display chip is adjusted, and the global clarity after each adjustment is used as feedback to determine whether the global clarity of the projected image meets the second preset condition. When the global clarity meets the second preset condition, the adjustment of the angle between the optical lens and the display chip is stopped to obtain the target angle.

[0053] Step S230: Projecting based on the distance and the target angle to obtain a target projection image.

[0054] In the embodiment of the present application, after obtaining the distance and the target angle, the distance and the target angle are used for projection to obtain a target projection picture.

[0055] In an embodiment of the present application, an adjustable optical lens and / or display chip is used to adjust the distance between the optical lens and the display chip, as well as the angle between the optical axis of the optical lens and the display chip. When the clarity of the central area of ​​the projection image meets a first preset condition, the adjustment of the distance between the optical lens and the display chip is stopped. During the adjustment process, the angle between the optical lens and the display chip is continuously adjusted according to the feedback of the adjusted global clarity. When the global clarity meets a second preset condition, the adjustment of the angle between the optical axis of the optical lens and the display chip is stopped to obtain a target angle. Projection is performed according to the distance between the optical lens and the display chip and the target angle to obtain a target projection image. In this way, the physical method of the optical lens and / or display chip with adjustable direction is utilized to adjust the distance between the optical lens and the display chip, as well as the angle between the optical axis of the optical lens and the display chip, and combined with the global clarity feedback of the projected image, the angle between the optical axis of the optical lens and the display chip is automatically adjusted, so that the clarity of each area of ​​the projected image is evenly improved, and the projection device can intelligently adjust the global clarity of the projection image. Moreover, after adjusting the distance between the optical lens and the display chip, the angle between the optical axis of the optical lens and the display chip is adjusted by feedback to realize automatic clarity correction and compensation when the projection device is side-projected, which can achieve accurate correction of the clarity of the projected image, thereby improving the projection efficiency and global clarity of the projection device.

[0056] In the embodiments of the present application, Figure 3 As shown, Figure 3 A projection method process provided in the embodiment of the present application Figure 2 , step S220, adjusting the angle between the optical axis of the optical lens and the display chip, and stopping adjusting the angle between the optical axis of the optical lens and the display chip when the global clarity of the projection picture of the projection device meets the second preset condition to obtain a target angle, including:

[0057] Step S221a: adjusting the angle between the optical axis of the optical lens and the display chip to obtain a projection image; the projection image is obtained after each adjustment of the angle between the optical axis of the optical lens and the display chip.

[0058] Step S222a: Determine the global clarity of the projection image.

[0059] Step S223a: When the global clarity of the projection image meets the second preset condition, the angle between the current optical axis of the optical lens and the display chip is used as the target angle.

[0060] In the embodiment of the present application, the method for determining the global clarity of the projection image includes: grayscale variance function, grayscale variance product function, Laplacian gradient function, etc. The embodiment of the present application does not specifically limit the method for determining the global clarity.

[0061] In an embodiment of the present application, each time the angle between the optical axis of the optical lens and the display chip is adjusted once, a corresponding projection picture will be obtained, the global clarity of the projection picture will be determined, and it will be judged whether the global clarity of the projection picture meets the second preset condition. If the second preset condition is met, the angle between the current optical axis of the optical lens and the display chip is used as the target angle for projection. If the second preset condition is not met, the angle between the optical axis of the optical lens and the display chip is continued to be adjusted to obtain another projection picture, determine the global clarity of the other projection picture, and judge whether the global clarity of the other projection picture meets the second preset condition until the global clarity of the projection picture obtained after adjustment meets the second preset condition, stop rotating the angle between the optical axis of the optical lens and the display chip, and use the angle between the current optical axis of the optical lens and the display chip as the target angle.

[0062] Exemplarily, if the second preset condition is that the global clarity of the projection picture is greater than or equal to the preset threshold, a projection picture 1 is obtained after adjustment, the global clarity of the projection picture 1 is determined, and it is judged whether the global clarity of the projection picture 1 is greater than or equal to the preset threshold. If it is greater than or equal to the preset threshold, the angle between the optical axis of the optical lens corresponding to the projection picture 1 and the display chip is used as the target angle, and the process ends; otherwise, the angle between the optical axis of the optical lens and the display chip is continued to be adjusted to obtain projection picture 2, the global clarity of the projection picture 2 is determined, and it is judged whether the global clarity of the projection picture 2 is greater than or equal to the preset threshold. If it is greater than or equal to the preset threshold, the angle between the optical axis of the optical lens corresponding to the projection picture 2 and the display chip is used as the target angle. Otherwise, the angle between the optical axis of the optical lens and the display chip is continued to be adjusted to obtain projection picture 3..., until the global clarity of the projection picture n is greater than or equal to the preset threshold, the angle between the optical axis of the optical lens corresponding to the projection picture n and the display chip is used as the target angle.

[0063] In an embodiment of the present application, the global clarity of the projection picture obtained after each adjustment is judged, and adjustments are made based on feedback of the global clarity of the projection picture after each adjustment, so that the accuracy of clarity compensation can be improved, and the adjustment can be stopped in time after the second preset condition is met, so that the optimal target angle can be quickly determined for projection, thereby saving a lot of time and computing resources required for adjusting the angle and improving the efficiency of clarity compensation.

[0064] In another embodiment provided in the present application, Figure 4 As shown, Figure 4 A projection method process provided in the embodiment of the present application Figure 3 , step S220, adjusting the angle between the optical axis of the optical lens and the display chip, and stopping adjusting the angle between the optical axis of the optical lens and the display chip when the global clarity of the projection picture of the projection device meets the second preset condition to obtain a target angle, including:

[0065] Step S221b: adjusting the angle between the optical axis of the optical lens and the display chip N times to obtain N projection images; the projection images are obtained after adjusting the angle between the optical axis of the optical lens and the display chip once each; and N is an integer greater than 1.

[0066] Step S222b: Determine the projection picture with the highest global clarity among the N projection pictures.

[0067] Step S223b: taking the angle between the optical axis of the optical lens corresponding to the projection picture with the highest global clarity and the display chip as the target angle.

[0068] In the embodiment of the present application, each time the angle between the optical axis of the optical lens and the display chip is adjusted once, a projection screen is obtained, and the angle between the optical axis of the optical lens and the display chip is adjusted N times to obtain N projection screens, where N is an integer greater than 1.

[0069] In an embodiment of the present application, after obtaining N projection images, it is necessary to determine the global clarity of the N projection images, wherein the N global clarity can be the global clarity of each projection image immediately determined after each projection image is captured, or the global clarity of the N projection images can be determined after the N projection images are captured. The embodiment of the present application does not make any specific limitation on this.

[0070] In an embodiment of the present application, after determining the global clarity of N projection images, the projection image with the highest global clarity is selected from the N global clarity, and the angle between the optical axis of the optical lens corresponding to the projection image and the display chip is used as the target angle for projection.

[0071] In another embodiment of the present application, the global clarity of N projection images is determined, and the change trend of the global clarity of the projection images is determined based on the N global clarity. Based on the change trend, it is determined whether the adjustment direction is correct, and the projection image with the highest global clarity is determined. For example, if the global clarity of the N projection images is in a continuous decline, it means that the adjustment direction is wrong, and timely feedback is given to the projection device to immediately change the adjustment direction; if the global clarity of the N projection images is in a continuous rise, it means that the adjustment direction is correct, and it can be inferred that the closer the angle between the optical axis of the optical lens and the display chip is to the maximum value, the higher the global clarity, and the maximum value of the angle between the optical axis of the optical lens and the display chip can be used as the target angle; if the global clarity of the N projection images rises first and then falls, it means that the projection image at the extreme point has the best global clarity, and the angle between the optical axis of the optical lens and the display chip corresponding to the projection image at the extreme point is used as the target angle.

[0072] In the embodiment of the present application, after determining the adjustment direction of the optical lens and / or the display chip, the angle between the optical axis of the optical lens and the display chip is adjusted N times according to the adjustment direction of the optical lens and / or the display chip to obtain N projection images, and the projection image with the best global clarity is comprehensively determined according to the global clarity of the N projection images, and the angle between the optical axis of the optical lens and the display chip corresponding to the projection image with the best global clarity is used as the target angle. In this way, the global clarity of the N projection images is fed back to the projection device, and the projection device changes the adjustment strategy in time according to the feedback, or determines the target angle, so as to avoid continuing to adjust when the adjustment direction is wrong, thereby wasting a lot of time, and directly determining the target angle according to the change trend of the N global clarity, so as to further improve the efficiency and accuracy of global clarity compensation.

[0073] In the embodiment of the present application, in step S220, adjusting the angle between the optical axis of the optical lens and the display chip includes:

[0074] Determining the angle between the optical axis of the optical lens and the projection surface;

[0075] Determining an adjustment direction of the optical lens and / or the display chip based on an angle between an optical axis of the optical lens and a projection surface;

[0076] Based on the adjustment direction of the optical lens and / or the display chip, the angle between the optical axis of the optical lens and the display chip is adjusted.

[0077] In the embodiment of the present application, the projection surface refers to a medium that can display the projection image, including but not limited to any type of equipment such as a wall, a projection screen, a ceiling, a television, a display screen, etc.

[0078] In the embodiment of the present application, data is collected by an inertial measurement unit (IMU) sensor, a gyroscope sensor, a time of flight (TOF) three-dimensional sensor, or other equipment with data collection function, and the angle between the optical axis of the optical lens and the projection surface is obtained after the data is calculated and processed. Of course, the method for determining the angle between the optical axis of the optical lens and the projection surface includes but is not limited to the method provided in the embodiment of the present application, and the angle between the optical axis of the optical lens and the projection surface can also be determined by other methods, which is not specifically limited in the embodiment of the present application.

[0079] In an embodiment of the present application, after determining the angle between the optical axis of the optical lens and the projection surface, the adjustment direction of the optical lens and / or the display chip is determined according to the angle between the optical axis of the optical lens and the projection surface. One embodiment includes determining the situation of the projection screen when the projection device is projected frontally, and then determining the difference between the two projection screens when projected frontally and sideways according to the situation of the projection screen when projected sideways, such as the difference in clarity of the two projection screens, and then combining the angle between the optical axis of the optical lens and the projection surface to determine the direction in which the projection screen needs to be clear, thereby determining the adjustment direction of the optical lens and / or the display chip. Of course, this is only one embodiment, and other methods may also be used. The embodiments of the present application do not impose specific restrictions on this.

[0080] For example, when the projection device is projecting forward, the projected image is globally clear; when the projection device is projecting sideways, the image close to the projection device is clearer, while the image far from the projection device is blurry; combined with the fact that the angle between the projection device and the projection surface is on the right, the adjustment direction of the optical lens and / or display chip is determined to be on the left.

[0081] In the embodiment of the present application, after determining the adjustment direction of the optical lens and / or the display chip, the angle between the optical axis of the optical lens and the display chip is adjusted. In this way, after determining the angle between the optical axis of the optical lens and the projection surface, the projection device can quickly determine the angle between the optical axis of the optical lens and the display chip, avoiding the need for the projection device to try each direction one by one during the subsequent adjustment process, thereby wasting a lot of time, further reducing the number of adjustment steps, and improving the efficiency of clarity compensation.

[0082] In the embodiment of the present application, in step S220, adjusting the angle between the optical axis of the optical lens and the display chip includes:

[0083] The optical lens and / or the display chip are adjusted in a first direction to adjust the angle between the optical axis of the optical lens and the display chip; the first direction is the opposite direction to the side projection direction of the projection device.

[0084] In the embodiment of the present application, the first direction refers to the adjustment direction of the optical axis of the optical lens and / or the display chip. After determining the first direction, the optical axis of the optical lens and / or the display chip are adjusted toward the first direction. Here, the optical lens can be adjusted, the display chip can be adjusted, or the optical lens and the display chip can be adjusted at the same time, which is not limited by the embodiment of the present application.

[0085] In the embodiment of the present application, the first direction is the opposite direction corresponding to the direction of the side projection of the projection device. The projection device can determine the direction of the side projection of the projection device based on optical principles. For example, when the projection device is side-projected, the angle between the optical axis of the optical lens and the projection surface will have an acute angle and an obtuse angle, where the left side is the acute angle and the right side is the obtuse angle. According to the optical principle, it can be obtained that the direction of the side projection of the projection device is the direction where the acute angle is located, that is, the side projection direction of the projection device is biased to the left. Of course, determining the direction of the side projection of the projection device includes but is not limited to the method provided in the embodiment of the present application, and the direction of the side projection of the projection device can also be determined by other means, and the embodiment of the present application does not specifically limit this.

[0086] In the embodiment of the present application, after determining the direction of the side projection of the projection device, according to the principle of optical reflection, the optical lens and / or the display chip are adjusted in the opposite direction of the side projection direction to change the direction of the side projection. For example, if the side projection direction of the projection device is biased to the left, the display chip is adjusted to the right while the optical lens is kept stationary. It should be understood that after adjusting the distance between the optical lens and the display chip, rotating the angle between the optical lens and the display chip is essentially adjusting the display chip around the middle line on the display chip. When adjusting the display chip, the display chip needs to be rotated clockwise or counterclockwise. Here, adjusting the display chip to the right means adjusting the display chip clockwise. Of course, here, adjusting the display chip is used as an example for illustration, which is only one of the embodiments. Other implementations also include adjusting the optical lens, and adjusting the optical lens and the display chip at the same time, etc. The embodiment of the present application does not specifically limit this.

[0087] In an embodiment of the present application, after determining the angle between the optical axis of the optical lens and the projection surface, the direction of the side projection of the projection device is determined, and the adjustment direction of the optical axis of the optical lens and / or the display chip is adjusted in the opposite direction corresponding to the direction of the side projection of the projection device.

[0088] In an embodiment of the present application, the first direction is determined based on the angle between the optical axis of the optical lens and the projection surface, and the optical lens and / or the display chip are adjusted to the first direction. In this way, after determining the angle between the optical axis of the optical lens and the projection surface, the projection device can quickly determine the angle between the optical axis of the optical lens and the display chip, thereby avoiding the need for the projection device to try each direction one by one during the subsequent adjustment process, thereby wasting a lot of time, further reducing the number of adjustment steps, and improving the efficiency of clarity compensation.

[0089] In the embodiments of the present application, Figure 5 As shown, Figure 5 A projection method process provided in the embodiment of the present application Figure 4 , step S210, before adjusting the distance between the optical axis of the optical lens and the display chip, the method further includes:

[0090] Step S510: resetting the initial optical lens; the optical axis of the reset optical lens is perpendicular to the display chip.

[0091] In the embodiment of the present application, when the projection device is not placed directly facing the projection surface, the optical lens and the display chip in the projection device may be at the projection angle when they were last used. For different side projection positions, the projection device needs to be readjusted to determine the target angle. Therefore, the projection device needs to be reset based on the last use so that the optical lens of the projection device is perpendicular to the display chip. Here, during the reset process, the optical lens can be adjusted, the display chip can be adjusted, and the optical lens and the display chip can be adjusted at the same time. The purpose of the reset process in the embodiment of the present application is to ensure that the optical axis of the optical lens is perpendicular to the display chip. Therefore, the embodiment of the present application does not impose specific restrictions on the object of adjustment.

[0092] In an embodiment of the present application, after the optical lens is reset, the optical axis of the optical lens is made perpendicular to the display chip. After the optical axis of the optical lens is perpendicular to the display chip, the optical lens is reset to avoid the last use affecting the result of the current projection picture clarity adjustment, resulting in poor projection effect of the projection device, and further achieving better global clarity of the side projection picture.

[0093] In the embodiments of the present application, Figure 6 As shown, Figure 6 A projection method process provided in the embodiment of the present application Figure 5 The projection method further includes:

[0094] Step S610: Based on a preset corresponding relationship, shape compensation is performed on the target projection image to obtain a final projection image; the corresponding relationship represents the corresponding relationship between the angle between the optical axis of the optical lens and the display chip and the shape compensation.

[0095] In the embodiment of the present application, the final projection picture is a projection picture with optimal shape and clarity obtained after shape compensation is performed on the target projection picture.

[0096] It should be understood that when a normal projection device is projecting, the shape projected onto the screen or wall is a rectangle. When projecting from the side, the adjustment of the angle between the optical axis of the optical lens and the display chip may have a certain impact on the shape of the projected image, causing the projected image to become a trapezoid. Therefore, after the image clarity is finally adjusted, the shape of the projected image is appropriately compensated to achieve the optimal final image shape and clarity.

[0097] In the embodiments of the present application, shape compensation refers to supplementing the deformed shape of the projection screen. For example, when projecting sideways, the projection screen is narrow at the top and wide at the bottom. The length of the upper side of the projection screen is compensated to ensure that the lengths of the upper and lower sides of the projection screen are the same, so that the shape of the compensated projection screen is a rectangle.

[0098] In an embodiment of the present application, the correspondence between the angle between the optical axis of the optical lens and the display chip and the shape compensation is calibrated during the design stage of the projection device. After the projection device is put into use, the shape compensation is determined directly based on the angle between the optical axis of the optical lens and the display chip according to the correspondence, and the shape of the projection picture is compensated to obtain the final projection picture.

[0099] Exemplarily, the calibration method of the corresponding relationship between the angle between the optical axis of the optical lens and the display chip and the shape compensation includes: first, at a specific distance (such as 2 meters), the projection picture is projected onto the wall; then the display chip is rotated to different angles, and the actual projection shape of the projection picture at this time is recorded; then the motion trajectory of the four vertices of the projection picture is respectively fitted with the current angle by polynomials to generate a corresponding relationship curve. When performing shape compensation, according to the angle between the optical axis of the current optical lens and the display chip, the relationship curve is used to obtain the actual shape offset of the projection picture at the current angle, and correction compensation is performed according to the actual shape. Of course, this is only one of the calibration methods provided in the embodiment of the present application, and other calibration methods can also be used, which is not specifically limited in the embodiment of the present application.

[0100] In an embodiment of the present application, after determining the target angle between the optical axis of the optical lens and the display chip, the target angle is used for projection to obtain a target projection image. Through a pre-calibrated correspondence, the target projection image is directly shape compensated to obtain a final projection image. In this way, the projection device can automatically and quickly compensate for the shape of the projection image according to the pre-calibrated correspondence to obtain a projection image with optimal clarity and shape, thereby increasing the functionality of the projection device and further improving the performance of the projection device.

[0101] The projection method provided in the embodiment of the present application is described in detail below in conjunction with specific application scenarios.

[0102] In this scenario, if Figure 7 As shown, Figure 7 The projection method process in this application scenario Figure 6 :

[0103] Step S701: The optical lens can be adjusted to reset.

[0104] In this application scenario, after the autofocus function is triggered, the projection device first resets the projection optical lens so that the optical axis of the optical lens is perpendicular to the display chip.

[0105] Step S702: focusing based on the central area.

[0106] On the basis that the optical axis of the optical lens is perpendicular to the display chip, the center of the projected image is automatically focused. Due to the side projection state at this time, the focusing result is that the middle area is clear and the two sides are blurred. The process of focusing the optical lens is actually the process of determining the distance between the optical lens and the display chip.

[0107] Step S703: adjusting the angle between the optical lens and the display chip.

[0108] After determining the distance between the optical lens and the display chip, the angle between the optical axis of the current projection device and the projection surface is obtained through three-dimensional sensors such as TOF, and the adjustment direction of the optical-mechanical angle is quickly determined based on the angle between the optical axis of the optical lens and the projection surface to reduce the number of adjustment steps, wherein the optical-mechanical here refers to the integrated components of the optical lens and display chip in this application.

[0109] It should be understood that the adjustment direction of the optical-mechanical angle is the adjustment direction of the optical lens and / or the display chip. After determining the adjustment direction of the optical lens and / or the display chip, the angle between the optical lens and the display chip is adjusted.

[0110] Step S704: Obtaining the best clarity under side projection.

[0111] In this application scenario, the global clarity of the adjusted projection picture is fed back to the projection device to determine whether the global clarity of the projection picture meets the second preset condition. If it does not meet the second preset condition, the adjustment continues. If it meets the second preset condition, the adjustment of the angle between the optical axis of the optical lens and the display chip is stopped. The angle between the optical axis of the optical lens and the display chip corresponding to the projection picture with the best global clarity is used as the target angle. The angle between the optical axis of the optical lens and the display chip is turned to the target angle, and projection is performed according to the distance and the target angle to obtain a projection picture with the best clarity.

[0112] Step S705: Perform shape compensation.

[0113] Since adjusting the angle between the optical axis of the optical lens and the display chip may have a certain impact on the shape of the projected image, the relationship between the angle between the optical axis of the optical lens and the display chip and the shape change is calibrated in advance. After the projection image clarity is finally adjusted, the shape of the projection image is appropriately compensated to achieve the optimal shape and clarity of the final projection image.

[0114] In this application scenario, the adjustable optical lens and display chip are used in conjunction with image algorithm feedback to achieve automatic clarity correction and compensation when the projection device is projected sideways. An optical lens with adjustable side projection resolution (clarity) can adjust the distance between the optical lens and the display chip, as well as the angle between the display chip (LCD / DLP surface) of the projection device and the optical lens through a mechanical structure to cover different resolution requirements when projecting sideways, where resolution can be understood as clarity.

[0115] In this application scenario, the camera is used to sense the resolution of the projected image, and the optical lens with adjustable side projection resolution is used to achieve the best resolution of the projected image when the projection device is projected sideways. The clarity of the center area is adjusted first, and then the angle between the display chip and the optical axis is fine-tuned in combination with the actual side projection scenario to quickly complete the entire focusing process. Relevant compensation is also performed to achieve the best picture clarity and shape.

[0116] The present application also provides a projection device, such as Figure 8 Show, Figure 8 The present application provides a schematic diagram of the structure of a projection device, which includes:

[0117] An adjusting unit 801 is used to adjust the distance between the optical lens and the display chip; when the clarity of the central area in the projection picture of the projection device meets the first preset condition, stop adjusting the distance between the optical lens and the display chip;

[0118] The adjustment unit 801 is also used to adjust the angle between the optical axis of the optical lens and the display chip. When the global clarity of the projection picture of the projection device meets the second preset condition, the adjustment of the angle between the optical axis of the optical lens and the display chip is stopped to obtain the target angle.

[0119] The projection unit 802 is used to perform projection based on the distance and the target angle to obtain a target projection picture.

[0120] In some embodiments, the adjustment unit is further used to adjust the angle between the optical axis of the optical lens and the display chip to obtain a projection picture; the projection picture is obtained after each adjustment of the angle between the optical axis of the optical lens and the display chip; determine the global clarity of the projection picture; when the global clarity of the projection picture meets a second preset condition, use the current angle between the optical axis of the optical lens and the display chip as the target angle.

[0121] In some embodiments, the adjustment unit is further used to adjust the angle between the optical axis of the optical lens and the display chip N times to obtain N projection pictures; the projection picture is obtained after adjusting the angle between the optical axis of the optical lens and the display chip each time; N is an integer greater than 1; determine the projection picture with the highest global clarity among the N projection pictures; and use the angle between the optical axis of the optical lens corresponding to the projection picture with the highest global clarity and the display chip as the target angle.

[0122] In some embodiments, the adjustment unit is further used to adjust the angle between the optical axis of the optical lens and the display chip in a first direction; the first direction is determined based on the angle between the optical axis of the optical lens and the projection surface.

[0123] In some embodiments, the adjustment unit is further used to reset the initial optical lens; the optical axis of the reset optical lens is perpendicular to the display chip.

[0124] In some embodiments, the projection unit is further used to perform shape compensation on the target projection image based on a preset corresponding relationship to obtain a final projection image; the corresponding relationship represents the corresponding relationship between the angle between the optical axis of the optical lens and the display chip and the shape compensation.

[0125] Of course, in practical applications, Fig. 9 As shown, the various components in the electronic device are coupled together via a bus system 902. It is understood that the bus system 902 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 902 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, Fig. 9 The various buses are collectively labeled bus system 902 .

[0126] It can be understood that the memory in this embodiment can be a volatile memory or a non-volatile memory, and can also include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic random access memory (FRAM), a flash memory, a magnetic surface memory, an optical disk, or a compact disc read-only memory (CD-ROM); the magnetic surface memory can be a disk memory or a tape memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Synchronous Static Random Access Memory (SSRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), Enhanced Synchronous Dynamic Random Access Memory (ESDRAM), SyncLink Dynamic Random Access Memory (SLDRAM), and Direct Rambus Random Access Memory (DRRAM).The memories described in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

[0127] The method disclosed in the above embodiment of the present application can be applied to a processor or implemented by a processor. The processor may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor or an instruction in the form of software. The above processor may be a general-purpose processor, a DSP, or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The processor can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or any conventional processor, etc. In combination with the steps of the method disclosed in the embodiment of the present application, it can be directly embodied as a hardware decoding processor to execute, or it can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium, which is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0128] The present application also provides a computer storage medium, specifically a computer readable storage medium, on which computer instructions are stored. As a first implementation, when the computer storage medium is located in an electronic device, the computer instructions are executed by a processor to implement any step of the above-mentioned projection method in the present application.

[0129] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0130] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0131] In addition, all functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may be separately configured as a unit, or at least two units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0132] A person of ordinary skill in the art can understand that: all or part of the steps of implementing the above-mentioned method embodiment can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium, which, when executed, executes the steps of the above-mentioned method embodiment; and the aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROM, RAM, disks or optical disks.

[0133] Alternatively, if the above-mentioned integrated unit of the present application is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the embodiment of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROM, RAM, magnetic disks or optical disks.

[0134] It should be noted that the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0135] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A projection method, applied to a projection device, characterized in that: The projection method comprises: Adjusting the distance between the optical lens and the display chip; when the clarity of the central area in the projection picture of the projection device meets the first preset condition, stopping adjusting the distance between the optical lens and the display chip; adjusting the angle between the optical axis of the optical lens and the display chip, and stopping adjusting the angle between the optical axis of the optical lens and the display chip when the global clarity of the projection picture of the projection device meets the second preset condition to obtain a target angle; Projection is performed based on the distance and the target angle to obtain a target projection picture.

2. The projection method according to claim 1, characterized in that: The adjusting the angle between the optical axis of the optical lens and the display chip, and stopping adjusting the angle between the optical axis of the optical lens and the display chip when the global clarity of the projection picture of the projection device meets the second preset condition to obtain the target angle, comprises: Adjusting the angle between the optical axis of the optical lens and the display chip to obtain a projection image; the projection image is obtained after adjusting the angle between the optical axis of the optical lens and the display chip each time; Determining the global clarity of the projected image; When the global clarity of the projection image meets the second preset condition, the angle between the current optical axis of the optical lens and the display chip is used as the target angle.

3. The projection method according to claim 1, characterized in that: The adjusting the angle between the optical axis of the optical lens and the display chip, and stopping adjusting the angle between the optical axis of the optical lens and the display chip when the global clarity of the projection picture of the projection device meets the second preset condition to obtain the target angle, comprises: Adjust the angle between the optical axis of the optical lens and the display chip N times to obtain N projection images; the projection images are obtained after adjusting the angle between the optical axis of the optical lens and the display chip once each time; N is an integer greater than 1; Determine a projection picture with the highest global clarity among the N projection pictures; The angle between the optical axis of the optical lens corresponding to the projection picture with the highest global clarity and the display chip is used as the target angle.

4. The projection method according to any one of claims 1 to 3, characterized in that: The adjusting the angle between the optical axis of the optical lens and the display chip comprises: Determining the angle between the optical axis of the optical lens and the projection surface; Determining an adjustment direction of the optical lens and / or the display chip based on an angle between an optical axis of the optical lens and a projection surface; Based on the adjustment direction of the optical lens and / or the display chip, the angle between the optical axis of the optical lens and the display chip is adjusted.

5. The projection method according to any one of claims 1 to 3, characterized in that: The adjusting the angle between the optical axis of the optical lens and the display chip comprises: The optical lens and / or the display chip are adjusted in a first direction to adjust the angle between the optical axis of the optical lens and the display chip, wherein the first direction is the opposite direction to the side projection direction of the projection device.

6. The projection method according to any one of claims 1 to 3, characterized in that: Before adjusting the distance between the optical lens and the display chip, the method further includes: The initial optical lens is reset; the optical axis of the reset optical lens is perpendicular to the display chip.

7. The projection method according to any one of claims 1 to 3, characterized in that: The projection method further comprises: Based on a preset corresponding relationship, shape compensation is performed on the target projection picture to obtain a final projection picture; the corresponding relationship represents the corresponding relationship between the angle between the optical axis of the optical lens and the display chip and the shape compensation.

8. A projection device, characterized in that: The projection device comprises: an adjusting unit, configured to adjust the distance between the optical lens and the display chip; and stop adjusting the distance between the optical lens and the display chip when the clarity of the central area in the projection picture of the projection device meets a first preset condition; The adjustment unit is further used to adjust the angle between the optical axis of the optical lens and the display chip, and when the global clarity of the projection picture of the projection device meets the second preset condition, stop adjusting the angle between the optical axis of the optical lens and the display chip to obtain a target angle; The projection unit is used to perform projection based on the distance and the target angle to obtain a target projection picture.

9. An electronic device, characterized in that: The invention comprises a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and the processor implements the projection method according to any one of claims 1 to 7 when executing the program.

10. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the computer program is executed by a processor, the projection method according to any one of claims 1 to 7 is implemented.

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