CN106032172B

CN106032172B - Projection method and device and aircraft

Info

Publication number: CN106032172B
Application number: CN201510118144.1A
Authority: CN
Inventors: 杜琳
Original assignee: Beijing Zhigu Ruituo Technology Services Co Ltd
Current assignee: Beijing Zhigu Ruituo Technology Services Co Ltd
Priority date: 2015-03-18
Filing date: 2015-03-18
Publication date: 2020-01-10
Anticipated expiration: 2035-03-18
Also published as: CN106032172A

Abstract

The embodiment of the application provides a projection method, a projection device and an aircraft. The method comprises the following steps: determining the state of at least one screen formed by the particles sprayed by at least one spray head according to the position and the spraying parameter group of the at least one spray head for spraying the particles and the attributes of the particles; and controlling at least one projection device to project projection content to the at least one screen according to at least the state of the at least one screen and the content to be displayed of the at least one screen. The embodiment of the application provides a projection scheme.

Description

Projection method and device and aircraft

Technical Field

The embodiment of the application relates to the technical field of display, in particular to a projection method, a projection device and an aircraft.

Background

A three-dimensional (3D) display technology of volume pixels is a method for presenting 3D content by constructing physical pixels in space, and is usually implemented by using a display screen rotating at a high speed, or a curtain rotating at a high speed in cooperation with peripheral projection.

Disclosure of Invention

In view of the above, an object of the embodiments of the present application is to provide a projection scheme.

To achieve the above object, according to a first aspect of embodiments of the present application, there is provided a projection method, including:

determining the state of at least one screen formed by the particles sprayed by at least one spray head according to the position and the spraying parameter group of the at least one spray head for spraying the particles and the attributes of the particles;

and controlling at least one projection device to project projection content to the at least one screen according to at least the state of the at least one screen and the content to be displayed of the at least one screen.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the at least one screen is formed by an airflow generated by the particles based at least on rotation of the movable at least one rotor.

With reference to the first aspect or any one of the foregoing possible implementations of the first aspect, in a second possible implementation of the first aspect, the at least one rotor is located on at least one first aircraft.

With reference to the first aspect or any one of the foregoing possible implementations of the first aspect, in a third possible implementation of the first aspect, the determining, at least according to a position and an ejection parameter set of at least one ejection head for ejecting particles and attributes of the particles, a state of at least one screen formed by the particles ejected by the at least one ejection head includes:

determining a state of the at least one screen based at least on the position and the set of injection parameters of the at least one injection head, the properties of the particles, and at least one motion parameter of the at least one rotor.

With reference to the first aspect or any one of the foregoing possible implementations of the first aspect, in a fourth possible implementation of the first aspect, the at least one motion parameter of the at least one rotor includes: direction of rotation, speed of rotation, angle of the at least one rotor.

With reference to the first aspect or any one of the foregoing possible implementations of the first aspect, in a fifth possible implementation of the first aspect, the controlling at least one projection device to project projection content onto the at least one screen according to at least a state of the at least one screen and content to be displayed on the at least one screen includes:

determining at least projection content of the at least one projection device according to at least the state of the at least one screen and content to be displayed of the at least one screen;

controlling the at least one projection device to project the projected content toward the at least one screen.

With reference to the first aspect or any one of the foregoing possible implementations of the first aspect, in a sixth possible implementation of the first aspect, the determining at least projection content of the at least one projection device according to at least a state of the at least one screen and content to be displayed of the at least one screen includes:

determining the projection content of the at least one projection device according to at least the state of the at least one screen, the content to be displayed of the at least one screen and the projection posture of the at least one projection device.

With reference to the first aspect or any one of the foregoing possible implementations of the first aspect, in a seventh possible implementation of the first aspect, the determining at least projection content of the at least one projection device according to at least a state of the at least one screen and content to be displayed of the at least one screen includes:

and determining the projection content of the at least one projection device and the projection posture of the at least one projection device at least according to the state of the at least one screen and the content to be displayed of the at least one screen.

With reference to the first aspect or any one of the foregoing possible implementation manners of the first aspect, in an eighth possible implementation manner of the first aspect, the controlling the at least one projection device to project the projection content to the at least one screen includes:

controlling the at least one projection device to project the projected content toward the at least one screen at the projection pose.

With reference to the first aspect or any one of the foregoing possible implementations of the first aspect, in a ninth possible implementation of the first aspect, the controlling at least one projection device to project projection content onto the at least one screen according to at least a state of the at least one screen and content to be displayed on the at least one screen includes:

determining a projection posture of at least one projection device according to at least the state of at least one screen, the content to be displayed of the at least one screen and the projection content of at least one projection device;

With reference to the first aspect or any one of the foregoing possible implementations of the first aspect, in a tenth possible implementation of the first aspect, the at least one projection device is located on at least one second aircraft;

the controlling the at least one projection device to project the projected content to the at least one screen at the projection pose includes:

determining at least one control parameter of the at least one second aircraft at least according to the projection attitude of the at least one projection device and the starting position of the at least one second aircraft;

controlling the at least one second aircraft and controlling the at least one projection device to project the projected content based at least on at least one control parameter of the at least one second aircraft.

With reference to the first aspect or any one of the foregoing possible implementations of the first aspect, in an eleventh possible implementation of the first aspect, the at least one control parameter of the at least one second aircraft includes at least one of: direction of rotation, speed of rotation, angle of at least one rotor of the at least one second aircraft.

With reference to the first aspect or any one of the foregoing possible implementations of the first aspect, in a twelfth possible implementation of the first aspect, the projection pose includes: projection direction, projection distance.

With reference to the first aspect or any one of the foregoing possible implementations of the first aspect, in a thirteenth possible implementation of the first aspect, the state of the at least one screen includes: a shape, position, pose, density distribution of the at least one screen.

With reference to the first aspect or any one of the foregoing possible implementations of the first aspect, in a fourteenth possible implementation of the first aspect, the property of the particle includes: density, volume, shape of the particles.

With reference to the first aspect or any one of the foregoing possible implementations of the first aspect, in a fifteenth possible implementation of the first aspect, the set of injection parameters includes: spray direction, spray flow rate, spray velocity.

To achieve the above object, according to a second aspect of embodiments of the present application, there is provided a projection apparatus including:

the determining module is used for determining the state of at least one screen formed by the particles sprayed by at least one spray head according to the position and the spraying parameter group of the at least one spray head for spraying the particles and the attributes of the particles;

and the control module is used for controlling at least one projection device to project the projection content to the at least one screen according to at least the state of the at least one screen and the content to be displayed of the at least one screen.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the at least one screen is formed by an airflow generated by the particles based at least on rotation of the movable at least one rotor.

In combination with the second aspect or any one of the above possible implementations of the second aspect, in a second possible implementation of the second aspect, the at least one rotor is located on at least one first aircraft.

With reference to the second aspect or any one of the foregoing possible implementations of the second aspect, in a third possible implementation of the second aspect, the determining module is specifically configured to: determining a state of the at least one screen based at least on the position and the set of injection parameters of the at least one injection head, the properties of the particles, and at least one motion parameter of the at least one rotor.

With reference to the second aspect or any one of the foregoing possible implementations of the second aspect, in a fourth possible implementation of the second aspect, the at least one motion parameter of the at least one rotor includes: direction of rotation, speed of rotation, angle of the at least one rotor.

With reference to the second aspect or any one of the foregoing possible implementations of the second aspect, in a fifth possible implementation of the second aspect, the control module includes:

the first determining unit is used for determining at least projection content of the at least one projection device according to at least the state of the at least one screen and content to be displayed of the at least one screen;

the first control unit is used for controlling the at least one projection device to project the projection content to the at least one screen.

With reference to the second aspect or any one of the foregoing possible implementations of the second aspect, in a sixth possible implementation of the second aspect, the first determining unit is specifically configured to: determining the projection content of the at least one projection device according to at least the state of the at least one screen, the content to be displayed of the at least one screen and the projection posture of the at least one projection device.

With reference to the second aspect or any one of the foregoing possible implementations of the second aspect, in a seventh possible implementation of the second aspect, the first determining unit is specifically configured to: and determining the projection content of the at least one projection device and the projection posture of the at least one projection device at least according to the state of the at least one screen and the content to be displayed of the at least one screen.

With reference to the second aspect or any one of the foregoing possible implementation manners of the second aspect, in an eighth possible implementation manner of the second aspect, the first control unit is specifically configured to: controlling the at least one projection device to project the projected content toward the at least one screen at the projection pose.

With reference to the second aspect or any one of the foregoing possible implementations of the second aspect, in a ninth possible implementation of the second aspect, the control module includes:

the second determining unit is used for determining the projection posture of at least one projection device according to at least the state of at least one screen, the content to be displayed of the at least one screen and the projection content of the at least one projection device;

and the second control unit is used for controlling the at least one projection device to project the projection content to the at least one screen in the projection posture.

With reference to the second aspect or any one of the foregoing possible implementations of the second aspect, in a tenth possible implementation of the second aspect, the at least one projection device is located on at least one second aircraft;

the second control unit includes:

a determining subunit, configured to determine at least one control parameter of the at least one second aircraft at least according to a projection attitude of the at least one projection device and a starting position of the at least one second aircraft;

and the control subunit is used for controlling the at least one second aircraft at least according to at least one control parameter of the at least one second aircraft and controlling the at least one projection device to project the projection content.

With reference to the second aspect or any one of the foregoing possible implementations of the second aspect, in an eleventh possible implementation of the second aspect, the at least one control parameter of the at least one second aircraft includes at least one of: direction of rotation, speed of rotation, angle of at least one rotor of the at least one second aircraft.

With reference to the second aspect or any one of the foregoing possible implementations of the second aspect, in a twelfth possible implementation of the second aspect, the projection pose includes: projection direction, projection distance.

With reference to the second aspect or any one of the foregoing possible implementations of the second aspect, in a thirteenth possible implementation of the second aspect, the state of the at least one screen includes: a shape, position, pose, density distribution of the at least one screen.

With reference to the second aspect or any one of the foregoing possible implementations of the second aspect, in a fourteenth possible implementation of the second aspect, the property of the particle includes: density, volume, shape of the particles.

With reference to the second aspect or any one of the foregoing possible implementations of the second aspect, in a fifteenth possible implementation of the second aspect, the set of injection parameters includes: spray direction, spray flow rate, spray velocity.

To achieve the above object, according to a third aspect of embodiments of the present application, there is provided an aircraft including:

at least one projection device;

and the control module is used for controlling the at least one projection device to project the projection content to the at least one screen at least according to the state of the at least one screen and the content to be displayed of the at least one screen.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the aircraft further includes: at least one rotor; the at least one screen is formed by airflow generated by the particles based at least on rotation of the at least one rotor.

With reference to the third aspect or any one of the foregoing possible implementations of the third aspect, in a second possible implementation of the third aspect, the determining module is specifically configured to: determining a state of the at least one screen based at least on the position and the set of injection parameters of the at least one injection head, the properties of the particles, and at least one motion parameter of the at least one rotor.

With reference to the third aspect or any one of the foregoing possible implementations of the third aspect, in a third possible implementation of the third aspect, the at least one motion parameter of the at least one rotor includes: direction of rotation, speed of rotation, angle of the at least one rotor.

With reference to the third aspect or any one of the foregoing possible implementation manners of the third aspect, in a fourth possible implementation manner of the third aspect, the control module includes:

With reference to the third aspect or any one of the foregoing possible implementation manners of the third aspect, in a fifth possible implementation manner of the third aspect, the first determining unit is specifically configured to: determining the projection content of the at least one projection device according to at least the state of the at least one screen, the content to be displayed of the at least one screen and the projection posture of the at least one projection device.

With reference to the third aspect or any one of the foregoing possible implementation manners of the third aspect, in a sixth possible implementation manner of the third aspect, the first determining unit is specifically configured to: and determining the projection content of the at least one projection device and the projection posture of the at least one projection device at least according to the state of the at least one screen and the content to be displayed of the at least one screen.

With reference to the third aspect or any one of the foregoing possible implementation manners of the third aspect, in a seventh possible implementation manner of the third aspect, the first control unit is specifically configured to: controlling the at least one projection device to project the projected content toward the at least one screen at the projection pose.

With reference to the third aspect or any one of the foregoing possible implementation manners of the third aspect, in an eighth possible implementation manner of the third aspect, the control module includes:

With reference to the third aspect or any one of the foregoing possible implementation manners of the third aspect, in a ninth possible implementation manner of the third aspect, the second control unit includes:

a determining subunit, configured to determine at least one control parameter of the aircraft at least according to a projection attitude of the at least one projection device and a starting position of the aircraft;

and the control subunit is used for controlling the aircraft at least according to at least one control parameter of the aircraft and controlling the at least one projection device to project the projection content.

With reference to the third aspect or any one of the foregoing possible implementations of the third aspect, in a tenth possible implementation of the third aspect, the at least one control parameter includes at least one of: direction of rotation, speed of rotation, angle of at least one rotor of the aircraft.

With reference to the third aspect or any one of the foregoing possible implementations of the third aspect, in an eleventh possible implementation of the third aspect, the projection pose includes: projection direction, projection distance.

With reference to the third aspect or any one of the foregoing possible implementations of the third aspect, in a twelfth possible implementation of the third aspect, the aircraft further includes: the at least one spray head.

With reference to the third aspect or any one of the foregoing possible implementations of the third aspect, in a thirteenth possible implementation of the third aspect, the aircraft is an unmanned aerial vehicle.

At least one of the above technical solutions has the following beneficial effects:

the embodiment of the application provides a projection scheme by determining the state of at least one screen formed by particles emitted by at least one nozzle according to at least the position and the spraying parameter group of at least one nozzle for spraying the particles and the attributes of the particles, and controlling at least one projection device to project projection content to the at least one screen according to the state of the at least one screen and the content to be displayed of the at least one screen.

Drawings

Fig. 1 is a schematic flowchart of an embodiment of a projection method provided in the present application;

FIG. 2 is a schematic structural diagram of a first embodiment of a screen forming apparatus provided in the present application;

FIGS. 3-5 are schematic structural diagrams of alternative implementations of the embodiment shown in FIG. 2;

fig. 6 is a schematic structural diagram of a second embodiment of a screen forming apparatus provided in the present application;

FIG. 7 is a schematic structural diagram of an embodiment of an aircraft provided herein;

FIGS. 8 to 12 are schematic structural diagrams of alternative implementations of the embodiment shown in FIG. 7;

fig. 13 is a physical schematic diagram of the implementation shown in fig. 12.

Detailed Description

The following detailed description of embodiments of the present application will be made with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

Fig. 1 is a schematic flowchart of an embodiment of a projection method provided in the present application. As shown in fig. 1, the present embodiment includes:

110. determining the state of at least one screen formed by the particles sprayed by at least one spray head according to the position and the spraying parameter group of the at least one spray head for spraying the particles and the properties of the particles.

For example, an embodiment of a projection apparatus provided by the present application is one or two, or an embodiment of an aircraft provided by the present application is an execution subject of the present embodiment, and is executed 110 to 120.

In this embodiment, each of the at least one nozzle has a respective position, and when the at least one nozzle is a plurality of nozzles, the positions of the plurality of nozzles may be the same or different.

In this embodiment, the position of the at least one nozzle may be an absolute position of the at least one nozzle, or may be a relative position of the at least one nozzle with respect to at least one other object. Wherein the at least one other object is optionally an object that has an effect on the particles ejected by the at least one nozzle to form the at least one screen.

In this embodiment, each of the at least one ejection head has a respective set of ejection parameters. Wherein the injection parameter set includes a plurality of injection parameters. In particular, the set of injection parameters comprises at least: the direction of the spray indicates in which direction a spray head sprays particles. Further, in addition to the injection direction, the injection parameter set optionally includes, but is not limited to, at least two of the following injection parameters: jet flow, jet speed, nozzle area, jet pressure. Wherein the ejection flow rate represents a volume of particles ejected by an ejection head per unit time; the jet velocity represents the velocity of particles jetted by a jet head at the outlet of the jet head, namely the outlet velocity; the spray head area represents a cross-sectional area at an outlet of a spray head; the spray pressure represents the pressure at the outlet of a spray head at which particles are sprayed by the spray head. For example, the set of injection parameters includes: a jetting direction, a jetting flow rate, a jetting speed, or the set of jetting parameters comprises: a spray direction, a spray flow rate, a spray head area, or the set of spray parameters comprises: a spray direction, a spray area, a spray velocity, or the set of spray parameters comprises: a jetting direction, a jetting flow rate, a jetting pressure, or the set of jetting parameters comprises: spray direction, spray area, spray pressure.

In this embodiment, the particles are in a solid state, or alternatively, in a liquid state. The particles may be, for example, dust, or, alternatively, water droplets.

In this embodiment, the properties of the particles include, but are not limited to: density, volume, shape of the particles.

In this embodiment, each of the at least one screen has a respective status. Specifically, the state of each screen includes, but is not limited to: the shape, position, attitude, density distribution of the screen. Wherein the shape may be planar, such as a planar rectangle, or solid, such as a solid cylinder, etc. The position can be any position which can be reached by the particles sprayed by the at least one spray head; since each screen occupies a certain space, the position is optionally the central position of the corresponding screen. The attitude may be an attitude of a screen with respect to a reference plane, for example, when the screen is a plane, the attitude may be an angle of the plane with respect to a horizontal plane, and when the screen is a cylinder, the attitude may be an angle of an axis of the cylinder with respect to the horizontal plane. The density distribution includes a distribution density of the particles in at least one region of a screen, the distribution density of the particles identifying how many of the particles are in a region; optionally, the density distribution is uniform, i.e. the distribution density of the particles is the same or approximately the same in all areas of a screen, or the density distribution is non-uniform.

It should be noted that the particles, after being ejected from the at least one nozzle, will not generally stay in the space where the at least one screen is located for a long time, but will spread after a certain time, but the particles ejected after the at least one nozzle can supplement the particles ejected before the at least one nozzle and spread from the space where the at least one screen is located, thereby maintaining the at least one screen in the shape at the position.

120. And controlling at least one projection device to project projection content to the at least one screen according to at least the state of the at least one screen and the content to be displayed of the at least one screen.

In this embodiment, each of the at least one screen has respective content to be displayed, and the content to be displayed of each screen is content that is desired to be displayed on the screen. Optionally, when the at least one screen is a plurality of screens, the content to be displayed of each screen is optionally independent or associated, for example, each screen displays a part of a picture, and the displays of the plurality of screens are combined into the picture.

In this embodiment, the content to be displayed may optionally be static content, such as a picture, or dynamic content, such as a video.

In this embodiment, the at least one projection device is optionally a miniature projection device.

In this embodiment, the at least one projection device has respective projection content, and the projection content of each projection device is related to the content to be displayed on the at least one screen. Specifically, the purpose of controlling the at least one projection device to project the projection content to the at least one screen is to display the content to be displayed of the at least one screen on the at least one screen. In one possible scenario, the at least one projection device is a projection device, the at least one screen is a screen, and the projection device is controlled to project projection content onto the screen; in yet another possible scenario, the at least one projection device is a projection device, the at least one screen is a plurality of screens, and the projection device is controlled to project the projection content to at least one of the plurality of screens according to a certain rule, for example, the projection device is controlled to project the same projection content to the plurality of screens at the same time, or the projection device is controlled to project the same or different projection content to each of the plurality of screens in turn; in yet another possible scenario, the at least one projection device is a plurality of projection devices, the at least one screen is a plurality of screens, and each projection device of the plurality of projection devices is controlled to project the projection content to at least one screen of the plurality of screens according to a certain rule.

The embodiment provides a projection scheme by determining the state of at least one screen formed by particles ejected by at least one ejection head according to at least the position and the ejection parameter group of the at least one ejection head used for ejecting the particles and the attributes of the particles, and controlling at least one projection device to project projection content to the at least one screen according to at least the state of the at least one screen and the content to be displayed of the at least one screen, and provides a ubiquitous 3D display scheme due to the flexibility of the spatial distribution of the particles.

The method of the present embodiment is further described below in some alternative implementations.

In this embodiment, in order to better control the particles emitted by the at least one nozzle so that the actual state of the at least one screen formed by the particles approaches or reaches the desired state, optionally, a controllable air flow is applied to the particles to form the at least one screen.

In an alternative implementation, the at least one screen is formed by an airflow generated by the particles based at least on rotation of the movable at least one rotor.

In particular, since the at least one rotor is movable, the effect of the air flow generated by the rotation of the at least one rotor when the at least one rotor moves to different positions on the particles emitted by the at least one nozzle may be different, so that the state of the at least one screen formed by the particles may be more flexibly controlled.

Specifically, each of the at least one rotor is comprised of a plurality of blades (e.g., blades of a fan, blades of an aircraft, etc.) that rotate about an axis.

Optionally, the at least one rotor is located on at least one first aircraft. The first aircraft may be any type of aircraft with a rotor, such as an Unmanned Aerial Vehicle (UAV).

In this implementation, since the airflow generated by the rotation of at least one rotor is related to the motion parameter of the at least one rotor, which is accordingly related to the state of the at least one screen, the motion parameter of the at least one rotor is also taken into account when determining the state of the at least one screen.

Optionally, the determining the state of at least one screen formed by the particles ejected by at least one nozzle head according to at least the position and the ejection parameter group of the at least one nozzle head used for ejecting the particles and the attributes of the particles includes:

In this scenario, each of the at least one rotor has its own at least one motion parameter; when the at least one rotor is a plurality of rotors, at least one motion parameter of the plurality of rotors may be the same, or, alternatively, different. Wherein the at least one motion parameter of the at least one rotor includes, but is not limited to: direction of rotation, speed of rotation, angle of the at least one rotor. Wherein the angle is optionally the angle of the axis of the rotor relative to a reference plane (such as a horizontal plane).

In this scenario, optionally, the position of the at least one nozzle is an absolute position, and the at least one motion parameter of the at least one rotor further comprises: an absolute position of the at least one rotor. Alternatively, the position of the at least one spray head is the relative position of the at least one spray head with respect to the at least one rotor.

In this scenario, the at least one motion parameter of the at least one rotor may be a fixed value or a value that varies with some variable (e.g., time), and accordingly, when the at least one motion parameter of the at least one rotor varies with some variable, the state of the at least one screen optionally also varies with those variables.

In yet another alternative implementation, since the state of the particles ejected by the at least one nozzle in the air, such as the motion trajectory, the residence time at a certain position or area, and the like, may be affected by environmental factors, the environmental information is optionally considered in determining the state of the at least one screen.

determining a state of at least one screen formed by the particles ejected by at least one ejection head based on at least a position and an ejection parameter set of the at least one ejection head for ejecting the particles, properties of the particles, and environmental information.

Wherein the environmental information includes, but is not limited to: wind speed, wind direction. Optionally, the environment information further includes: temperature, humidity, etc. In addition, the environmental information is optionally detected by a corresponding sensor, such as a wind speed sensor, a wind direction sensor, a temperature sensor, a humidity sensor, etc.

It should be noted that in the above implementation, the influence of environmental factors is also optionally considered. Correspondingly, the determining the state of at least one screen formed by the particles ejected by at least one nozzle head according to at least the position and the ejection parameter group of the at least one nozzle head used for ejecting the particles and the attributes of the particles comprises:

determining a state of the at least one screen based at least on the position and the set of injection parameters of the at least one injection head, the properties of the particles, and at least one motion parameter and environmental information of the at least one rotor.

It should be noted that, for convenience of calculation, the influence of the environmental factors may not be considered in a corresponding implementation when the controllable airflow, such as the airflow generated by the rotation of the at least one rotor, has a much greater effect on the particles emitted by the at least one nozzle than the influence of the environmental factors.

In this embodiment, there are multiple implementation manners for controlling at least one projection device to project the projection content to the at least one screen according to at least the state of the at least one screen and the content to be displayed on the at least one screen.

In an optional implementation manner, the controlling at least one projection device to project the projection content to the at least one screen according to at least the state of the at least one screen and the content to be displayed of the at least one screen includes:

In one possible scenario, the determining at least the projection content of the at least one projection device according to at least the state of the at least one screen and the content to be displayed of the at least one screen includes:

In this scenario, each of the at least one projection device has a projection pose with respect to each of the at least one screen. Wherein the projection pose includes, but is not limited to: projection direction, projection distance. It should be noted that a projection device may have different projection postures with respect to different screens, and different projection devices may have different projection postures with respect to the same screen.

Wherein the projection pose of the at least one projection device may be fixed or may be changed according to a certain rule, such as time.

In yet another possible scenario, the determining at least the projection content of the at least one projection device according to at least the state of the at least one screen and the content to be displayed of the at least one screen includes:

In this scenario, in particular, each of the at least one projection device has a certain projection pose with respect to each of the at least one screen. Optionally, the projection pose includes, but is not limited to, at least one of: projection direction, projection distance. It should be noted that a projection device may have different projection postures with respect to different screens, and different projection devices may have different projection postures with respect to the same screen.

Wherein the determined projection pose of the at least one projection device may be fixed or may be changed according to a certain rule, such as time. When the projection attitude of the at least one projection device changes according to a certain rule, the determined projection content of the at least one projection device optionally changes along with the change of the projection attitude.

In this scenario, optionally, all projection poses of the at least one projection device are determined in the above step, that is, the projection direction and the projection distance of the at least one projection device relative to the at least one screen are determined in the above step, or a part of projection poses of the at least one projection device are determined in the above step. In a possible scenario, the partial projection pose of the at least one projection device is known, i.e. already set and not altered in the method of the present embodiment, and accordingly the unknown partial projection pose of the at least one projection device is determined in combination with the known partial projection pose of the at least one projection device in the above steps. For example, the at least one projection device includes projection devices a and B, the at least one screen includes screens S1 and S2, the positions of projection devices a and B with respect to screens S1 and S2 are known, i.e., the projection distances of projection devices a and B are known, and accordingly, in this scenario, the projection contents of projection devices a and B, and the projection directions of projection devices a and B are determined according to the states of screens S1 and S2, the contents to be displayed of screens S1 and S2, and the projection distances of projection devices a and B.

It should be noted that, in this scenario, the determined projection content of the at least one projection device and the projection pose of the at least one projection device may be relatively independent or may be correlated, for example, the projection content of the at least one projection device is changed with the projection pose of the at least one projection device.

In any of the above scenarios, further the controlling the at least one projection device to project the projection content to the at least one screen includes:

For example, the at least one projection device includes projection devices a and B, the at least one screen includes screens S1 and S2, the projection posture of projection device a with respect to screen S1 is PA1, the projection posture of projection device a with respect to screen S1 is CA1, the projection posture of projection device a with respect to screen S2 is PA2, the projection posture of projection device a with respect to screen S2 is content CA2, the projection posture of projection device B with respect to screen S1 is PB1, the projection posture of projection device B with respect to screen S1 is content CB, the projection posture of projection device B with respect to screen S2 is PB2, the projection posture of projection device B with respect to screen S2 is also content CB, and accordingly, projection device a is controlled to project content CA1 with projection posture PA1 to screen S1, content CA2 with projection posture PA2 to screen S2, and projection device B is controlled to project content CA1 with respect to screen S1, Content CB is projected to screen S2 in projection pose PB 2.

In this implementation, since the reflective characteristics of the particles constituting the at least one screen have a certain effect on the display effect, such as brightness, contrast, etc., of the projection content of the at least one projection device projected onto the at least one screen, optionally, the reflective characteristics of the particles are also taken into account when determining the projection content of the at least one projection device.

In yet another optional implementation manner, the controlling at least one projection device to project the projection content to the at least one screen according to at least the state of the at least one screen and the content to be displayed on the at least one screen includes:

In particular, each of the at least one projection device has a projection pose with respect to each of the at least one screen. Optionally, the projection pose includes, but is not limited to, at least one of: projection direction, projection distance. It should be noted that a projection device may have different projection postures with respect to different screens, and different projection devices may have different projection postures with respect to the same screen.

Wherein the determined projection pose of the at least one projection device may be fixed or may change according to a certain rule, such as changing with time or projection content.

In any of the above implementations, the projection pose of the at least one projection device is largely determined by the position of the at least one projection device relative to the at least one screen. Wherein the position of the at least one screen may be determined at 110, and the position of the at least one projection device may be fixed or movable.

Optionally, the at least one projection device is located on at least one second aircraft;

Wherein the second aircraft may be any type of aircraft, optionally a UAV.

In particular, each of the at least one second aircraft has its own starting position and its own at least one control parameter. Specifically, the starting position of an aircraft is the position of the second aircraft before the second aircraft is controlled by the method of the present embodiment.

In a scenario where a second aircraft includes at least one rotor, the at least one control parameter of the at least one second aircraft includes, but is not limited to, at least one of: direction of rotation, speed of rotation, angle of at least one rotor of the at least one second aircraft. In particular, each rotor of each of said at least one second aircraft has its own direction of rotation, speed of rotation, angle, wherein the angle is optionally the angle of the axis of the corresponding rotor with a reference plane (such as a horizontal plane). It should be noted that the flight path of a second aircraft is determined by the starting position of the second aircraft and the control parameters of the second aircraft.

In a scenario where a second aircraft does not include a rotor, such as where the second aircraft is a fixed-wing aircraft, the at least one control parameter of the at least one second aircraft includes, but is not limited to, at least one of: a flight path, a target location of the at least one second aircraft.

Further, optionally at least one of the at least one control parameter of the at least one second aircraft is known, i.e. already set and not modified in the method of the present embodiment, then in the above step the unknown at least one control parameter of the at least one second aircraft is determined in combination with the known at least one control parameter of the at least one second aircraft, and the at least one second aircraft is controlled accordingly as a function of the known at least one control parameter and the determined at least one control parameter.

In addition, the at least one control parameter of the at least one second aircraft may be a fixed value or a value that varies with some variable (e.g., time), and accordingly, when the at least one control parameter of the at least one second aircraft varies with some variable, the at least one second aircraft is controlled in accordance with the at least one control parameter of the at least one second aircraft and the variable.

It is noted that in this scenario, control of the at least one second aircraft and control of the at least one projection device may be interrelated. For example, the at least one projection device is controlled to project the projection content when the at least one second aircraft reaches the corresponding position, the at least one projection device is not turned on when the at least one second aircraft does not reach the corresponding position, or the projection attitude of the at least one projection device is changed as the position of the at least one second aircraft is changed, and the projection content of the at least one projection device is optionally changed, and accordingly, in the process of controlling the at least one second aircraft, the at least one projection device is simultaneously controlled to project the projection content changed as the position of the at least one second aircraft is changed at the projection attitude changed as the position of the at least one second aircraft is changed.

In a scenario in which the at least one rotor is located on at least one first aircraft and the at least one projection device is located on at least one second aircraft, the at least one second aircraft may be the same as, or different from, the at least one first aircraft.

In this embodiment, the at least one spray head may be located at any position. Optionally, the position of the at least one spray head is constant or the position of the at least one spray head is variable.

Optionally, the at least one nozzle is located on the at least one first aircraft, and/or on the at least one second aircraft, and/or on at least one other aircraft than the at least one first aircraft and the at least one second aircraft.

For example, an aircraft has a rotor, and three sprayers and three projection devices are arranged on the aircraft, in this scenario, particles emitted by the three sprayers on the aircraft form at least one screen under the action of an airflow formed by rotation of the rotor of the aircraft, and the three projection devices on the aircraft project onto the at least one screen, that is, the at least one first aircraft is the same as the at least one second aircraft.

As another example, an aircraft a has two rotors and four nozzles, an aircraft B is located near the aircraft a, the aircraft B has fixed wings and no rotors, and a projection device is disposed on the aircraft B, particles ejected from the four nozzles on the aircraft a form at least one screen under the action of airflow formed by the rotation of the two rotors of the aircraft a, and a projection device on the aircraft B projects the particles onto the at least one screen, that is, the at least one first aircraft is different from the at least one second aircraft.

By way of further example, an aircraft a has four rotors, the aircraft a is provided with a nozzle, the aircraft a has an aircraft B in the vicinity of the aircraft a, the aircraft B has two rotors, the aircraft B is provided with a projection device, that is, the aircraft a and the aircraft B have six rotors in total, particles ejected from a nozzle on the aircraft a form at least one screen under the action of airflow formed by rotation of the six rotors, and a projection device on the aircraft B projects the particles onto the at least one screen, that is, the at least one first aircraft (i.e., the aircraft a and the aircraft B) is different from the at least one second aircraft (i.e., the aircraft B), and the at least one first aircraft (i.e., the aircraft a and the aircraft B) includes the at least one second aircraft (i.e., the aircraft B).

As another example, an aircraft a has two rotors and a projection device, an aircraft B is located near the aircraft a, the aircraft B has a fixed wing and no rotor, and the aircraft B is provided with four nozzles and two projection devices, that is, a total of three projection devices are located on the aircraft a and the aircraft B, particles ejected from the four nozzles on the aircraft B form at least one screen under the action of airflow formed by the rotation of the two rotors of the aircraft a, and the three projection devices project onto the at least one screen, that is, the at least one first aircraft (i.e., the aircraft a) is different from the at least one second aircraft (i.e., the aircraft a and the aircraft B), and the at least one second aircraft (i.e., the aircraft a and the aircraft B) includes the at least one first aircraft (i.e., the aircraft a).

Fig. 2 is a schematic structural diagram of a first projection apparatus according to an embodiment of the present disclosure. As shown in fig. 2, the projection apparatus 200 includes:

a determining module 21, configured to determine a state of at least one screen formed by particles ejected by at least one nozzle according to at least a position and an ejection parameter set of the at least one nozzle for ejecting particles and attributes of the particles;

and the control module 22 is configured to control at least one projection device to project the projection content to the at least one screen according to at least a state of the at least one screen and a content to be displayed on the at least one screen.

In this embodiment, the at least one projection device has respective projection content, and the projection content of each projection device is related to the content to be displayed on the at least one screen. Specifically, the purpose of the control module 22 controlling the at least one projection device to project the projection content onto the at least one screen is to display the content to be displayed of the at least one screen on the at least one screen. In one possible scenario, the at least one projection device is a projection device, the at least one screen is a screen, and the control module 22 controls the projection device to project the projection content onto the screen; in yet another possible scenario, the at least one projection device is a projection device, the at least one screen is a plurality of screens, and the control module 22 controls the projection device to project the projection content to at least one of the plurality of screens according to a certain rule, for example, controls the projection device to project the same projection content to the plurality of screens at the same time, or controls the projection device to project the same or different projection content to each of the plurality of screens in sequence; in yet another possible scenario, the at least one projection device is a plurality of projection devices, the at least one screen is a plurality of screens, and the control module 22 controls each projection device of the plurality of projection devices to project the projection content to at least one screen of the plurality of screens according to a certain rule.

The projection device of the embodiment determines the state of at least one screen formed by the particles sprayed by at least one spray head through a determination module at least according to the position and the spraying parameter group of the at least one spray head for spraying the particles and the attributes of the particles, and controls at least one projection device to project projection content to the at least one screen at least according to the state of the at least one screen and the content to be displayed of the at least one screen, thereby providing a projection scheme, and providing a ubiquitous 3D display scheme due to the flexibility of the spatial distribution of the particles.

The projection device 200 of the present embodiment is further described below by some alternative implementations.

Optionally, the at least one rotor is located on at least one first aircraft.

In one possible scenario, the determining module 21 is specifically configured to: determining a state of the at least one screen based at least on the position and the set of injection parameters of the at least one injection head, the properties of the particles, and at least one motion parameter of the at least one rotor.

Wherein the at least one motion parameter of the at least one rotor includes, but is not limited to: direction of rotation, speed of rotation, angle of the at least one rotor.

The detailed implementation of this implementation mode may refer to the corresponding description in the embodiment of the projection method provided in this application.

Optionally, the determining module 21 is specifically configured to: determining a state of at least one screen formed by the particles ejected by at least one ejection head based on at least a position and an ejection parameter set of the at least one ejection head for ejecting the particles, properties of the particles, and environmental information.

In this embodiment, the control module 22 has a plurality of implementation manners.

In an alternative implementation, as shown in fig. 3, the control module 22 includes:

a first determining unit 221, configured to determine at least projection content of the at least one projection device according to at least a state of the at least one screen and content to be displayed of the at least one screen;

a first control unit 222, configured to control the at least one projection device to project the projection content onto the at least one screen.

In a possible scenario, the first determining unit 221 is specifically configured to: determining the projection content of the at least one projection device according to at least the state of the at least one screen, the content to be displayed of the at least one screen and the projection posture of the at least one projection device.

Wherein the projection pose includes, but is not limited to: projection direction, projection distance.

In another possible scenario, the first determining unit 221 is specifically configured to: and determining the projection content of the at least one projection device and the projection posture of the at least one projection device at least according to the state of the at least one screen and the content to be displayed of the at least one screen.

Optionally, the projection pose includes, but is not limited to, at least one of: projection direction, projection distance.

In any of the above scenarios, further, the first control unit 222 is specifically configured to: controlling the at least one projection device to project the projected content toward the at least one screen at the projection pose.

In particular, the projection pose of the at least one projection device is largely determined by the position of the at least one projection device relative to the at least one screen. Wherein the position of the at least one screen may be determined by the determination module 21, the position of the at least one projection device may be fixed or movable.

the first control unit 222 includes:

Optionally, the at least one control parameter of the at least one second aircraft includes, but is not limited to, at least one of: direction of rotation, speed of rotation, angle of at least one rotor of the at least one second aircraft.

In yet another alternative implementation, as shown in fig. 4, the control module 22 includes:

a second determining unit 223, configured to determine a projection posture of at least one projection device according to at least a state of the at least one screen, content to be displayed of the at least one screen, and projection content of the at least one projection device;

a second control unit 224, configured to control the at least one projection device to project the projection content to the at least one screen in the projection pose.

Wherein the projection pose includes, but is not limited to, at least one of: projection direction, projection distance.

as shown in fig. 5, the second control unit 224 includes:

a determining subunit 2241, configured to determine at least one control parameter of the at least one second aircraft according to at least the projection pose of the at least one projection device, the starting position of the at least one second aircraft;

a control subunit 2242, configured to control the at least one second aircraft at least according to at least one control parameter of the at least one second aircraft, and control the at least one projection device to project the projection content.

Optionally, the at least one control parameter of the at least one second aircraft comprises at least one of: direction of rotation, speed of rotation, angle of at least one rotor of the at least one second aircraft.

In this embodiment, the projection apparatus 200 may be disposed in a device in the form of software and/or hardware. Optionally, the projection device 200 is disposed in an aircraft. Wherein the aircraft is optionally one of the at least one first aircraft, or one of the at least one second aircraft.

Fig. 6 is a schematic structural diagram of a second projection apparatus according to an embodiment of the present disclosure. As shown in fig. 6, the projection apparatus 600 includes:

a processor (processor)61, a communication Interface (Communications Interface)62, a memory (memory)63, and a communication bus 64. Wherein:

the processor 61, the communication interface 62, and the memory 63 communicate with each other via a communication bus 64.

A communication interface 62 for communication with an external device.

The processor 61 is configured to execute the program 632, and may specifically execute the relevant steps in the foregoing projection method embodiment.

In particular, the program 632 may include program code that includes computer operating instructions.

The processor 61 may be a central processing unit CPU or an application specific Integrated circuit asic or one or more Integrated circuits configured to implement embodiments of the projection method.

The memory 63 stores a program 632. The memory 63 may comprise high-speed RAM memory, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory. The program 632 may be specifically configured to cause the projection apparatus 600 to perform the following steps:

For specific implementation of each step in the program 632, reference may be made to corresponding steps and corresponding descriptions in units in the foregoing projection method embodiments, which are not described herein again.

In this embodiment, optionally, the projection apparatus 600 is disposed in one of the at least one projection device.

Optionally, the projection apparatus 600 is provided together with the at least one projection device.

Optionally, the projection device 600 is provided with the at least one spray head.

Optionally, the projection apparatus 600 is disposed with the at least one projection device and the at least one spray head, for example, on an aircraft.

Optionally, the projection device 600 is an aircraft. When projection device 600 is an aircraft, projection device 600 optionally further comprises (not shown in fig. 6): at least one of the at least one spray head.

FIG. 7 is a schematic structural diagram of an embodiment of an aircraft provided herein. As shown in fig. 7, the aircraft 700 includes:

at least one projection device 71;

a determining module 72, configured to determine a state of at least one screen formed by particles ejected by at least one nozzle according to at least a position and an ejection parameter set of the at least one nozzle for ejecting particles and attributes of the particles;

a control module 73, configured to control the at least one projection device 71 to project the projection content onto the at least one screen according to at least a state of the at least one screen and a content to be displayed on the at least one screen.

In this embodiment, the aircraft 700 may be any type of aircraft. Optionally, the aircraft 700 is a UAV.

It should be noted that fig. 7 illustrates only two projection devices 71, and does not imply a limitation on the number of projection devices 71 in the aircraft 700.

In this embodiment, the at least one projection device 71 is optionally a miniature projection device.

In this embodiment, the at least one projection device 71 has respective projection contents, and the projection contents of each projection device 71 are related to the contents to be displayed on the at least one screen. Specifically, the purpose of the control module 73 controlling at least one projection device to project the projection content to the at least one screen is to display the content to be displayed of the at least one screen on the at least one screen. In one possible scenario, the at least one projection device 71 is a projection device 71, the at least one screen is a screen, and the control module 73 controls the projection device 71 to project projection content onto the screen; in yet another possible scenario, the at least one projection device 71 is a projection device 71, the at least one screen is a plurality of screens, and the control module 73 controls the projection device 71 to project the projection content to at least one of the plurality of screens according to a certain rule, for example, controls the projection device 71 to project the same projection content to the plurality of screens at the same time, or controls the projection device 71 to project the same or different projection content to each of the plurality of screens in turn; in yet another possible scenario, the at least one projection device 71 is a plurality of projection devices 71, the at least one screen is a plurality of screens, and the control module 73 controls each projection device 71 of the plurality of projection devices 71 to project the projection content to at least one screen of the plurality of screens according to a certain rule.

The aircraft of the embodiment determines the state of at least one screen formed by particles sprayed by at least one spray head according to at least the position and the spraying parameter group of the at least one spray head for spraying the particles and the attributes of the particles by the determination module, and controls at least one projection device to project projection content to the at least one screen according to at least the state of the at least one screen and the content to be displayed of the at least one screen, provides a projection scheme, and provides a ubiquitous 3D display scheme due to the flexibility of the spatial distribution of the particles and the mobility of the aircraft.

The aircraft 700 of the present embodiment is further described below in some alternative implementations.

In an alternative implementation, as shown in fig. 8, the aircraft 700 further comprises: at least one rotor 74; the at least one screen is formed by the airflow generated by the particles based at least on the rotation of the at least one rotor 74. It should be noted that fig. 8 illustrates only two rotors 74, and is not meant to limit the number of rotors 74 in the aircraft 700.

Specifically, because the at least one rotor 74 is movable with the aircraft 700, the effect of the airflow generated by the rotation of the at least one rotor 74 on the particles ejected by the at least one nozzle may be different when the at least one rotor 74 moves to different positions, thereby allowing more flexible control of the state of the at least one screen formed by the particles.

In this implementation, since the airflow generated by the rotation of the at least one rotor 74 is related to a parameter of the motion of the at least one rotor 74, and accordingly, the motion of the at least one rotor 74 is related to the state of the at least one screen by at least one second aircraft, the determination module 72 also takes into account the motion of the at least one rotor 74 by the at least one second aircraft when determining the state of the at least one screen.

Optionally, the determining module 72 is specifically configured to: determining a state of the at least one screen based at least on the position and the set of injection parameters of the at least one injection head, the properties of the particles, and at least one motion parameter of the at least one rotor 74.

In this scenario, each rotor 74 of the at least one rotor 74 has its own at least one second aircraft; when the at least one rotor 74 is a plurality of rotors 74, at least one second aircraft of the plurality of rotors 74 may be the same, or, alternatively, different. Wherein the at least one second aerial vehicle of the at least one rotor 74 includes, but is not limited to: direction of rotation, speed of rotation, angle of the at least one rotor 74. Wherein the angle is optionally the angle of the axis of the rotor 74 with a reference plane (such as a horizontal plane).

In this scenario, optionally, the position of the at least one spray head is an absolute position, and the at least one second aircraft of the at least one rotor 74 further comprises: the absolute position of the at least one rotor 74, or the position of the at least one spray head is the relative position of the at least one spray head with respect to the at least one rotor 74. In this scenario, the at least one second aircraft of the at least one rotor 74 may be a fixed value or a value that varies with some variable (e.g., time), and accordingly, when the at least one second aircraft of the at least one rotor 74 varies with some variable, the state of the at least one screen optionally also varies with those variables.

In yet another alternative implementation, since the state of the particles ejected by the at least one nozzle in the air, such as the motion trajectory, the residence time at a certain position or area, and the like, may be influenced by environmental factors, the determination module 72 optionally considers the environmental information when determining the state of the at least one screen.

Optionally, the determining module 72 is specifically configured to: determining a state of at least one screen formed by the particles ejected by at least one ejection head based on at least a position and an ejection parameter set of the at least one ejection head for ejecting the particles, properties of the particles, and environmental information.

It should be noted that in the above implementation, the influence of environmental factors is also optionally considered. Accordingly, the determining module 72 is specifically configured to:

determining a state of the at least one screen based at least on the position and set of injection parameters of the at least one injector, the properties of the particles, and at least one second aircraft and environmental information of the at least one rotor 74.

It should be noted that, for convenience of calculation, the influence of the environmental factors may not be considered in a corresponding implementation when the controllable airflow, such as the airflow generated by the rotation of the at least one rotor 74, has a much greater effect on the particles emitted by the at least one nozzle than the influence of the environmental factors.

In this embodiment, the control module 73 has various implementations.

In an alternative implementation, as shown in fig. 9, the control module 73 includes:

a first determining unit 731, configured to determine at least the projection content of the at least one projection device 71 according to at least the state of the at least one screen and the content to be displayed of the at least one screen;

a first control unit 732, configured to control the at least one projection device 71 to project the projection content onto the at least one screen.

In an alternative implementation, the first determining unit 731 is specifically configured to: determining the projection content of the at least one projection device 71 at least according to the state of the at least one screen, the content to be displayed of the at least one screen and the projection posture of the at least one projection device 71.

Optionally, the projection pose includes, but is not limited to: projection direction, projection distance.

In yet another possible scenario, the first determining unit 731 is specifically configured to: determining the projection content of the at least one projection device 71 and the projection posture of the at least one projection device 71 according to at least the state of the at least one screen and the content to be displayed of the at least one screen.

In any of the above scenarios, further, the first control unit 732 is specifically configured to: controlling the at least one projection device 71 to project the projected content to the at least one screen at the projection pose.

In this implementation, the projection pose of the at least one projection device 71 is largely determined by the position of the at least one projection device 71 relative to the at least one screen. Wherein the position of the at least one screen may be determined by the determination module 72, the at least one projection device 71 may be fixed or movable on the aircraft 700.

Optionally, the first control unit 732 includes:

a determining subunit, configured to determine at least one control parameter of the aircraft 700 at least according to the projection attitude of the at least one projection device 71 and the starting position of the aircraft 700;

a control subunit, configured to control the aircraft 700 at least according to at least one control parameter of the aircraft 700, and to control the at least one projection device 71 to project the projection content.

Optionally, the at least one control parameter includes, but is not limited to, at least one of: direction of rotation, speed of rotation, angle of at least one rotor 74.

In yet another alternative implementation, as shown in fig. 10, the control module 73 includes:

a second determining unit 733, configured to determine a projection posture of at least one projection device 71 according to at least a state of the at least one screen, a content to be displayed of the at least one screen, and a projection content of the at least one projection device 71;

a second control unit 734, configured to control the at least one projection device 71 to project the projection content onto the at least one screen in the projection pose.

Alternatively, as shown in fig. 11, the second control unit 734 includes:

a determining subunit 7341, configured to determine at least one control parameter of the aircraft 700 at least according to the projection attitude of the at least one projection device 71 and the starting position of the aircraft 700;

a control subunit 7342, configured to control the aircraft 700 at least according to at least one control parameter of the aircraft 700, and to control the at least one projection device 71 to project the projection content.

Optionally, the at least one control parameter comprises at least one of: direction of rotation, speed of rotation, angle of at least one rotor 74.

In an alternative implementation, as shown in fig. 12, the aircraft 700 further includes: the at least one spray head 75. It should be noted that only two spray heads 75 are illustrated in FIG. 12 and that no limitation on the number of spray heads 75 in aircraft 700 is intended.

Fig. 13 is a physical schematic diagram of the implementation shown in fig. 12. As shown in fig. 13, the aircraft 700 has four rotors 74, and the aircraft 700 further includes: the rotor protectors 76 of the four rotors 74 are provided, wherein three spray heads 75 are distributed on the rotor protector 76 of one rotor 74, and one projection device 71 is provided on each of the rotor protectors 76 of two adjacent rotors 74. In addition, the portion of the figure that is filled with diagonal stripes is the fuselage of the aircraft 700. It should be noted that the determination module 72 and the control module 73 are not illustrated in fig. 13 for simplicity of description.

Those of ordinary skill in the art will appreciate that the various illustrative elements and method steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The above embodiments are only for illustrating the invention and are not to be construed as limiting the invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention, therefore, all equivalent technical solutions also belong to the scope of the invention, and the scope of the invention is defined by the claims.

Claims

1. A method of projection, the method comprising:

controlling at least one projection device to project projection content to the at least one screen according to at least the state of the at least one screen and the content to be displayed of the at least one screen; the at least one screen is formed by airflow generated by the particles based at least on rotation of the movable at least one rotor.

2. The method of claim 1, wherein determining the state of at least one screen formed by the particles ejected from at least one nozzle according to at least the position and the set of ejection parameters of the at least one nozzle for ejecting the particles and the properties of the particles comprises:

3. The method according to claim 1 or 2, wherein the controlling at least one projection device to project the projection content to the at least one screen according to at least the state of the at least one screen and the content to be displayed of the at least one screen comprises:

4. The method of claim 3, wherein determining at least the projected content of the at least one projection device according to at least the state of the at least one screen and the content to be displayed of the at least one screen comprises:

5. The method according to claim 1 or 2, wherein the controlling at least one projection device to project the projection content to the at least one screen according to at least the state of the at least one screen and the content to be displayed of the at least one screen comprises:

6. The method of claim 5, wherein the at least one projection device is located on at least one second aircraft;

7. A projection device, the projection device comprising:

the control module is used for controlling at least one projection device to project projection content to the at least one screen according to at least the state of the at least one screen and the content to be displayed of the at least one screen; the at least one screen is formed by airflow generated by the particles based at least on rotation of the movable at least one rotor.

8. An aircraft, characterized in that it comprises:

at least one projection device;

the control module is used for controlling the at least one projection device to project the projection content to the at least one screen at least according to the state of the at least one screen and the content to be displayed of the at least one screen; the at least one screen is formed by airflow generated by the particles based at least on rotation of the movable at least one rotor.

9. The aircraft of claim 8, further comprising: at least one rotor; the at least one screen is formed by airflow generated by the particles based at least on rotation of the at least one rotor;

the determining module is specifically configured to: determining a state of the at least one screen based at least on the position and the set of injection parameters of the at least one injection head, the properties of the particles, and at least one motion parameter of the at least one rotor.