Image projection device

Abstract

To perform advertisement or route guidance by easily and surely projecting an image at a desired place.SOLUTION: A drone 102 on which a projector 101 which projects an image 502 is loaded is arranged in a parking lot 400 of a large-sized shopping mall, etc., and a charge spot 401 which performs charging of an image projection device 100 on standby (power supply to a battery 201) is installed in the parking lot 400. The drone 102 is moved while being interlocked with the projection of the image 502 by the projector 101, thereby configuring the image projection device 100 capable of easily and surely projecting a large-sized image at a desired place without being affected by an environmental change such as human or object movement. Thus, an image guiding an advertisement or a privilege of an attraction or a shop forward in a direction of movement or an image guiding a place of the attraction or the shop or a route to the attraction or the shop can be projected.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to an image projection device that projects an image. [Background technology]

[0002] In recent years, images have become more and more visual, such as in video advertisements at stations and stores, and watching videos on smartphones. The opportunities for doing so are becoming more diverse. A projection unit is installed on an autonomous robot, and the state of the projection surfaces around the robot is displayed. By detecting the presence of a person and projecting the image onto the projection surface, the image is easily visible to the general public. There is a technology related to a video display system that allows the display of See Patent Document 1. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-125816 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the conventional technique described in the above-mentioned Patent Document 1 requires a person near the robot to Anyone with vision can see the image, but if there are multiple people between the robot and the person, If a robot is positioned between the camera and the projection screen, the image may be partially lost or The problem was that he was completely unable to see.

[0005] The present invention solves the above-mentioned problems of the prior art, and is not affected by the environment. To provide an image projection device capable of easily and reliably projecting an image at a desired location without The purpose of this document is to: [Means for solving the problem]

[0006] In order to solve the above problems and achieve the object, the image projection device according to the present invention is an image projection unit that projects an image; a moving unit that moves the image projection unit; and a control unit that controls the moving unit in association with the projection of an image.

[0007] In the image projection device according to the present invention, the image projection unit projects a photographing unit that photographs an image projected by the image projection unit and the and controlling the moving unit based on the image captured by the imaging unit to move the image projection unit. It is characterized by:

[0008] In the image projection device according to the present invention, the control unit controls the imaging device to project the image. detects whether or not the image projected by the image projection unit is distorted based on the image captured by the shadow unit; The image projection unit corrects distortion of the image projected based on the detection result. do.

[0009] In the image projection device according to the present invention, the image projection unit projects a viewer detection unit for detecting a viewer who sees an image corresponding to the viewer, The moving unit is controlled based on a detection result of the detection unit, and the image projection unit is moved. It is a sign.

[0010] In the image projection device according to the present invention, the surrounding environment of the viewer is changed. a situation detection unit that detects a situation, and the control unit, based on a detection result of the situation detection unit, The image projection unit is characterized in that it switches the image to be projected.

[0011] In the image projection device according to the present invention, the control unit controls the viewing The movement of the viewer is detected based on the detection result of the viewer detection unit, and the viewer is detected in the forward direction of the movement of the viewer. and controlling the moving unit so as to project an image onto the image projection unit, thereby moving the image projection unit. do.

[0012] In the image projection device according to the present invention, the image projection unit projects a situation detection unit that detects a situation ahead in a moving direction of a viewer who visualizes an image to be controlled, A control unit switches the image projected by the image projection unit based on the detection result of the situation detection unit. It is characterized by the fact that Effect of the Invention

[0013] According to the image projection device of the present invention, the image can be projected easily and reliably regardless of the environment. This provides the advantage of being able to project an image at a desired location. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is an explanatory diagram illustrating an example of the appearance of an image projection device. [Diagram 2] FIG. 2 is an explanatory diagram showing a hardware configuration of the image projection device. [Diagram 3] FIG. 2 is a block diagram showing an example of a functional configuration of the image projection device. [Figure 4] FIG. 1 is an explanatory diagram (part 1) showing an example of a usage mode of an image projection device. [Diagram 5] FIG. 2 is an explanatory diagram (part 2) showing an example of a usage mode of the image projection device. [Figure 6]11 is a flowchart showing an example of a processing procedure of the image projection device. [Figure 7] FIG. 11 is an explanatory diagram illustrating an example of an image projection device according to another embodiment of the present invention and an environment in which the image projection device moves. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Preferred embodiments of the image projection device according to the present invention will be described in detail below with reference to the accompanying drawings. will be explained.

[0016] <Embodiment> (An example of the appearance of an image projection device) First, an example of the appearance of an image projection device according to an embodiment of the present invention will be described. FIG. 1 is an explanatory diagram showing an example of the appearance of an image projection device. As shown in FIG. 100 includes a projector 101, a drone 102, a camera 103, and a human sensor. 104 and is provided.

[0017] The projector 101 includes a projector light source, an optical system, a projection lens, etc. (Both are not shown in the figures). The projector 101 projects light emitted from a projector light source. The light is guided along a predetermined path by an optical system and projected onto the projector 101 via a projection lens 101a. By shining light onto the outside of the device, an image is projected onto the surface where the light is being shone. Integrator lens that improves the uniformity of the illuminance of the light emitted from the projector light source, non-polarized light A polarization conversion element that converts (polarizes) the light emitted from the source into a specified polarization direction, a projector light A dichroic mirror separates the light from the LCD panels display images according to the light, and digital cameras combine the images of each color displayed by each LCD panel. It is composed of an ichroic prism and other components (both not shown in the figure).

[0018] The projector 101 may be, for example, a projector that uses a laser as a light source. A laser projector can be used. By using the laser beam splitter, the projector 101 can be made smaller. The laser type projector uses a mercury lamp as the projector light source. It can generate less heat than conventional projectors, so it can be equipped with a cooling fan and other mechanisms. By omitting it, it is possible to reduce the size and weight.

[0019] In addition, by using a laser projector, it can start up quickly and project images. In addition, by using a laser projector, Compared to silver lamp projectors, this projector consumes less power and projects brighter images. It is possible to achieve this.

[0020] Mercury lamp projectors should be used with the projection (optical axis) direction horizontal. The recommended projection direction is limited because the projection is not possible with laser-based projection. The projector can be used with the optical axis tilted relative to the horizontal. Laser projectors offer a high degree of freedom in the direction of projection, making it possible to project images onto walls. It can also project images onto the ground and floor.

[0021] The drone 102 moves the projector 101. By moving the projector 101 by the lawn 102, the projector 1 The drone 102 can move the projection location of the image by the drone 101. For example, a quadcopter with four propellers 105 can be used. The Lone 102 is not limited to quadcopters, but also includes hexacopters with six propellers. It uses various types of multicopters, such as helicopters and octocopters with eight propellers. It is possible.

[0022] The projector 101 is fixed to the drone 102 and is not affected by the movement of the drone 102 ( The projector 101 moves with the drone 102. The projector 10 may be connected in an adjustable state. 1 is connected to the bottom of the drone 102 via a universal joint such as a ball joint. The Projector 101 can be attached to a drone via a universal joint such as a ball joint. By connecting it to the projector 102, the projector 101 can be adjusted with a high degree of freedom. It can be secured.

[0023] In this case, the image projection device 100 changes the appearance of the projector 101 relative to the drone 102. In order to adjust the momentum without human intervention, the appearance of the projector 101 relative to the drone 102 is The actuator may include a drive mechanism for varying the force. The drive mechanism may be, for example, a motor or a gear train. The appearance of the projector 101 relative to the drone 102 By making the projection angle adjustable, the image can be projected at the optimal angle depending on the location where the image is to be projected. It is possible.

[0024] The camera 103 captures the image projected by the projector 101. Specifically, this can be realized by, for example, a general-purpose digital camera. 103 is, for example, a lens 103 arranged in the same direction as the projection direction of the image by the projector 101. With 03a pointed, it is fixed to the drone 102.

[0025] The camera 103 has a lens facing the direction in which the image is projected by the projector 101. The camera may be connected to the drone 102 in such a way that the direction of the camera can be adjusted. The camera 103 is rotated around the axis that connects the camera 103 to the drone 102. The camera 103 is attached to the bottom of the drone 102 via a ball joint or other suitable attachment. The camera 103 may be connected via a universal joint such as a ball joint. By connecting the camera 103 to the drone 102, the camera 103 can be adjusted with high degree of freedom. can be secured.

[0026] In this case, the image projection device 100 adjusts the direction in which the lens 103a is pointed without manual intervention. In order to achieve this, a driving mechanism is provided to change the attitude of the camera 103 relative to the drone 102. The drive mechanism may be, for example, a motor, a gear train, etc. The direction in which the lens 103a is pointed relative to the projection direction of the image by the projector 101. By making the distance between the camera 103 and the projector 101 adjustable, the projector 101 can capture the image projected by the projector 101 using one camera 103. It is possible to capture a projected image or an image of the surroundings of the image projection device 100. do.

[0027] In the image projection device 100, the attitude of the projector 101 relative to the drone 102 is a driving mechanism for adjusting the attitude of the camera 103 relative to the drone 102; Each of the projectors 101 may operate independently. While projecting an image, the projected image is photographed by the camera 103, or the camera By adjusting the attitude of 103, it is possible to capture an image in a direction different from the projection direction of the image.

[0028] The camera 103 is not limited to a general-purpose digital camera. For example, Night vision cameras that can take pictures in dark places by amplifying their sensitivity, and cameras that are sensitive to infrared rays This may be achieved by an infrared camera. By installing such a camera 103, Even at night, the image projected by the projector 101 can be captured without using a light source for auxiliary imaging. This allows the image projection device 100 to be lighter and consume less power. The increase in force can be suppressed.

[0029] The human presence sensor 104 detects a viewer within a predetermined range from the image projection device 100. The viewer is the object on which the image projected by the image projection device 100 is viewed. Specifically, the sensor 104 can be realized by an infrared sensor, for example. The infrared sensor detects the infrared ray emitted by a subject such as a viewer of an image projected by the image projection device 100. The temperature sensor detects the temperature rise (temperature change) caused by the infrared ray being absorbed by the light receiving element. The infrared sensor detects the presence or absence of a person in view and outputs a predetermined electrical signal. The movement of the viewer can be detected.

[0030] The detection range of the human sensor 104 realized by the infrared sensor is For example, the sensitivity of the infrared sensor, the number and layout of the sensor elements (pixels), The amount of human movement can be adjusted by adjusting the amplification factor of the current sensed by the human sensor. The sensor 104 is not limited to an infrared sensor, but may be, for example, an ultrasonic sensor. It may be a device that detects a person using infrared light or visible light, or a device that combines infrared light and ultrasonic waves. The present invention may also be applied to a method for detecting viewers by combining the above-mentioned methods.

[0031] (Hardware configuration of image projection device 100) Next, the hardware configuration of the image projection device 100 will be described. FIG. 2 is an explanatory diagram showing a hardware configuration of the image projection device 100. The hardware of the 00 includes a battery 201, a control circuit 202, a communication I / F 203, and a GPS. Receiver 204, motor 205, projector 101, camera 103, motion sensor 1 04, a microphone 206, and a speaker 207. The units 101, 103, 104, 201 to 207 are connected by a bus 200. There are.

[0032] The battery 201 supplies the power required for the operation of each unit of the image projection device 100. The battery 201 is, for example, a secondary battery (rechargeable battery, storage battery) such as a lithium battery. The battery 201 realized by a secondary battery can be realized by It may be detachable from the ring 102.

[0033] The image projection device 100 also includes a charging contact for charging the battery 201. The charging contact may be, for example, in the form of an exposed terminal, or in the form of a connector. Alternatively, the image projection device 100 may include a charging unit for charging the battery 201. Instead of or in addition to electrical contacts, wireless power transmission er Transfer, Contactless Power Transmissi The power receiving coil may be provided at a power receiving portion.

[0034] Wireless power supply receives power from the battery 201 without going through a charging contact. This is a technology for powering a device with a power source, which is also called non-contact power supply or wireless power supply. The roof 102 is provided on the inside of the exterior surface of the roof 102. This prevents the roof 102 from being damaged by rain or dew. This can prevent deterioration or breakdown of the image projection device 100. This may be achieved by a primary battery that only discharges current power.

[0035] The control circuit 202 is configured with a CPU, a memory, etc., and is provided in the image projection device 100. The CPU controls the operation of each part by executing the programs stored in the memory. The memory is used to control the entire image projection device 100. The memory also stores, for example, image information relating to the image to be projected. Stores various information.

[0036] Specifically, memory is, for example, IC memory or SSD (Solid State Drive). The memory can be realized by a memory device such as a memory card. On the other hand, a removable memory card is inserted through a card slot provided in the image projection device 100. The memory card may be, for example, a Secure Digital (SD) This function can be realized by an IC card such as a memory card. This function may be realized by an attached hard disk or USB memory. stomach.

[0037] Specifically, the control circuit 202 includes, for example, a flight controller and an ESC (Electronic Steering Controller). The control circuit 202 is equipped with a synchronous speed controller (synchronous speed controller). In addition, BEC (Battery Elimination Circuit) and U The battery 201 may be equipped with a universal BEC. When a secondary battery is used, the control circuit 202 controls the charging (storage) of the battery 201. The charging circuit may include a charging circuit that performs the steps.

[0038] The flight controller performs calculations related to the rotation control of the motor 205 and generates a control signal. The ESC controls the motor based on the control signal output from the flight controller. The flight controller controls the rotation of the image projection device 205 during the flight of the image projection device 100. The tilt of the projection device 100 is detected and calculations are repeatedly performed to adjust the motor 205 The control signal is output recursively.

[0039] The flight controller controls the propeller (propeller motor 205) relative to the ESC. It outputs a control signal to control the direction and speed of rotation. By outputting a control signal to control the rotation of the propellers in the opposite directions, an image projection device In addition, for example, the propeller at the front of the aircraft is rotated to the propeller at the rear of the aircraft. The image projection device 100 is advanced by controlling the rotation of the rotor to be slower than that of the rotor. For example, the propeller on the right side of the aircraft's direction of travel should rotate slower than the propeller on the left side of the aircraft's direction of travel. By controlling the image projection device 100 to rotate to the right, the image projection device 100 is rotated to the right.

[0040] Specifically, the control circuit 202 controls, for example, the image projected by the projector 101. A GPU (Graphics Processing Unit) specialized for image processing It includes a GPU, which allows fast-moving videos to be projected in high quality. It is possible.

[0041] The communication I / F 203 connects the image projection device 100 to the network N through a communication line. An interface between the network N and the inside of the image projection device 100. It controls the interface and receives data from external devices connected via network N. The network N controls the input and output of data to an external device. Net, LAN (Local Area Network), WAN (Wide Area This can be achieved through the use of a Network.

[0042] The communication I / F 203 is, for example, a wireless interface using Wi-Fi (registered trademark). The communication I / F 203 is connected to a mobile phone line (for example, LTE (Long Term Evolution), PHS (Personal Handy-phone System) The interface may be a wireless communication interface such as a cellular phone (cellular phone) or a cellular phone (cellular phone).

[0043] The control circuit 202 communicates with an external device via the communication I / F 203, For example, various information including image information related to the image to be projected is acquired from the external device. In addition, each time the control circuit 202 obtains various information from an external device, The acquired information is stored in memory, and the contents of the memory are updated based on the acquired information. Or you can do that.

[0044] The GPS receiver 204 identifies the current location of the image projection device 100. Specifically, 4 is, for example, a GPS antenna, an RF (Radio Frequency ) section, baseband section, etc. The GPS antenna receives the radio waves broadcast by the GPS satellites. The RF section restores the unmodulated signal received by the GPS antenna to a baseband signal. The baseband unit modulates the baseband signal demodulated by the RF unit to generate a signal for the image projection device. The GPS receiver 204 further calculates the current position of the GPS receiver 100 by filtering the GPS signal. Filters, LNAs (Low Noise Amplifiers), and power amplifiers (PAs) The device may also include an amplifier such as a power amplifier.

[0045] The current position of the image projection device 100 is determined based on radio waves transmitted from multiple GPS satellites. The baseband section can determine the distance to each of the four GPS satellites. Positioning is performed by calculating the distances and then calculating the position where each of the distances intersect. Based on the radio waves received from the GPS satellites, the geometric relationship between the GPS satellites and the image projection device 100 is determined. Instead of GPS to find position, Michibiki, GLONASS, and Galileo The current location of the image projection device 100 is identified using a satellite positioning system such as ALILEO. This is also fine.

[0046] The motor 205 is controlled by the control circuit 202 and rotates to generate a propeller. Specifically, the motor 205 has a rotor made of a permanent magnet. Therefore, a brushless motor in which the stator is composed of a coil can be used. The number of rotors 205 can be the same as the number of propellers 105. The image projection device 100 is moved forward or backward by rotating the respective actuators 105 independently. It can also be rotated left and right.

[0047] If a driving mechanism for adjusting the attitude of the projector 101 or the camera 103 is provided, The control circuit 202 also controls the operation of the motors 205 that each of these drive mechanisms has. As a result, the image projection device 100 can project the projector 101 and the camera 103 while moving. The posture of each can be adjusted independently (individually).

[0048] As described above, the projector 101 converts light emitted from the projector light source into a and irradiates the light outside the projector 101 via the projection lens 101a. The projector 101 projects an image at the location where the light is irradiated. The intensity of the light emitted from the projector light source is adjusted according to the distance from the position where the image is projected. The image quality of the projected image may be adjusted by adjusting the brightness of the projector 10. The distance between the image projector 1 and the position where the image is projected can be determined, for example, by using a distance sensor. The distance sensor may be, for example, a laser distance sensor, an ultrasonic sensor, or an infrared sensor. Various known sensors such as a pressure sensor can be used.

[0049] The camera 103 is equipped with an image sensor, and converts light received by the image sensor through a photographing lens into an electrical signal. The generated image information (photographed data) is The signal is output to the control circuit 202. The camera 103 may be a camera for taking still images. The camera may be capable of capturing video. A video is a series of still images captured at a predetermined time interval. Image information is reproduced according to the standard format of the compression method for specified video and audio data (e.g. For example, MPEG (Moving Picture Experts Group) ) may be compressed.

[0050] The human presence sensor 104 detects changes in temperature caused by infrared light absorption by the light receiving element, and emits an electric current in response to the change. The human sensor 104 outputs a signal to the control circuit 202. Specifically, the human sensor 104, for example, A current signal corresponding to a temperature change is converted into a voltage signal and amplified, and the amplified voltage signal is amplified when the amplified voltage signal exceeds a predetermined threshold. When the value is exceeded, a predetermined electrical signal is output to the control circuit 202. When a predetermined electrical signal output from the human sensor 104 is received, Detect the person.

[0051] The microphone 206 collects sounds around the image projection device 100. The microphone 206 converts the voice input as log data into an electrical signal. The analog audio signal input as analog data is converted to digital and Generates audio data in .tar format.

[0052] The speaker 207 generates sound by vibrating a diaphragm with an electric signal, which is an audio signal. The speaker 207 may be an output terminal that outputs an audio signal. An external speaker may be connected to the output terminal to generate sound.

[0053] The image projection device 100 also notifies the status of the image projection device 100, though not shown in the drawings. LED lamps for displaying the image, and keys or buttons for inputting instructions to the image projection device 100 The input / output device may include an input / output device for inputting other information processing devices. It may be realized by a connectable connection terminal or the like.

[0054] In addition, the image projection device 100 is connected to the image projection device 100 via a card slot. The memory card I / F may be an interface for connecting the memory card to the storage device. It is responsible for the interface between the memory card and the internal memory, and inputs data from the memory card. and controls the output of data to the memory card. The image to be projected is stored on a memory card, and the image can be projected by simply replacing the memory card. The image projected by 100 can be switched.

[0055] (An example of a functional configuration of the image projection device 100) Next, an example of the functional configuration of the image projection device 100 will be described. 3 is a block diagram showing an example of a functional configuration of the device 100. The image projection device 100 according to this embodiment includes a control unit 301, a storage unit 302, and an image An image projection unit 303, a photographing unit 304, a viewer detection unit 305, a situation detection unit 306, and a movement The above is realized by a processing unit 307.

[0056] The control unit 301 controls the entire image projection device 100. Specifically, the control unit 301 For example, the function can be realized by the control circuit 202 shown in FIG. More specifically, the control unit 301 controls, for example, the CP in the control circuit 202 shown in FIG. The function is performed by executing a program stored in memory, etc., using U. It can be realized.

[0057] The storage unit 302 stores various programs related to the control by the control unit 301 and the execution of the programs. The storage unit 302 stores various information including the threshold value used for the row. 3, image information regarding the image to be projected and the movement (flying) range of the image projection device 100 are The storage unit 302 may store information related to the vehicle's location, information related to battery charging spots, etc. Specifically, for example, the memory in the control circuit 202 shown in FIG. The function can be realized.

[0058] The storage unit 302 stores information input in advance by an administrator of the image projection device 100. Alternatively, information acquired through communication via the communication I / F 203 may be stored. Communication via the communication I / F 203 can be performed periodically, such as at a specified time or at specified intervals. It may be performed at any time depending on the condition of the communication line.

[0059] The image projection unit 303 is controlled by the control unit 301 to project a predetermined image. The shadow unit 303 projects an image based on image information stored in a memory, for example. In this case, the image projection unit 303 is specifically, for example, the projector shown in FIG. The function is realized by the memory in the control circuit 202 shown in FIG. It is possible.

[0060] In addition, the image projection unit 303 may receive, for example, In this case, the image projection unit 303 may project an image based on the image information. For example, the projector 101 shown in FIG. 1 or FIG. 2 and the communication I / F 2 shown in FIG. This function can be realized by using 03, etc.

[0061] Displaying an image based on image information acquired from an external device via the communication I / F 203 This allows for a highly vivid image to be displayed. Based on image information acquired from an external device such as a specified server via the communication I / F 203 By projecting the image, the image is kept fresh based on the latest image information stored in the server. It can project high quality images.

[0062] Specifically, the image projection unit 303 projects, for example, an advertisement image to a viewer. The image of the advertisement may be a still image or a video. is not limited to advertisements, but also includes still images such as maps and videos of entertainment works such as dramas and movies. The image information stored in the memory may be realized by an image file such as HTML Files may be included, and may consist of image files and HTML files. may be also possible.

[0063] The image information relating to the image of the advertisement may be associated with audio information. In the case where the image projection device 100 includes a speaker 207, the image projection device 100 can project an image to a viewer. By outputting audio, it is possible to This makes it easier for the viewer to focus their attention on the image projected by the imaging device 100. This allows the observer to reliably see the image.

[0064] In addition, the image projection unit 303 may project an image that calls the viewer's attention, for example. Specifically, the image projection unit 303 may, for example, detect that a vehicle is approaching the viewer. Images that alert the viewer to road conditions ahead in the direction of travel, or It may also be possible to project images informing people of the possibility of earthquakes, lightning, sudden heavy rain, etc.

[0065] The image capturing unit 304 is controlled by the control unit 301 and captures the image projected by the projector 101. The image capturing unit 304 may also capture the surroundings of the image projection device 100. Specifically, the photographing unit 304 is, for example, a camera 103 shown in FIG. This function can be realized.

[0066] The viewer detection unit 305 is controlled by the control unit 301, and the projector 101 projects The viewer detection unit 305 detects the movement of the viewer. Specifically, for example, the image projection determined by the GPS receiver 204 may be detected. Based on the current position of the camera device 100 and the position of the viewer detected by the viewer detection unit 305, By using this method, it is possible to detect whether a viewer is moving and the direction in which the viewer is moving.

[0067] The viewer detection unit 305 detects the image based on the detection result of the human sensor 104, for example. A viewer present within a predetermined range from the imaging device 100 is detected. In this case, the viewer detection unit 30 Specifically, the human presence sensor 104 shown in FIG. 1 and FIG. 2 detects the presence of the human presence. The above functions can be realized.

[0068] The viewer detection unit 305 detects a viewer based on an image captured by the camera 103, for example. Specifically, the image captured by the camera 103 may be analyzed, and the object captured in the image may be detected. By determining whether or not a person is present, it is possible to detect a viewer. Specifically, the awake person detection unit 305 detects an awake person by the camera 103 shown in FIG. 1 or FIG. 2. This function can be realized.

[0069] When the viewer detection unit 305 is realized using the camera 103, the image projection device 100 itself The camera 103 may be moved to change the range of the camera 103 to detect viewers. In this case, the viewer detection unit 305 further detects the flight control in the control circuit 202 shown in FIG. The controller, ESC, BEC, UBEC, motor 205, and the propeller shown in Figure 1 This function can be realized by the laser 105 or the like.

[0070] The camera 103 which realizes the viewer detection unit 305 detects the projection of an image by the projector 101. The camera is connected to the drone 102 in such a way that the direction in which the lens is pointed can be adjusted with respect to the shadow direction. In this case, the attitude of the camera 103 relative to the drone 102 is adjusted to detect the viewer. In this case, the viewer detection unit 305 may further A mechanism for adjusting the direction in which the lens of the camera 103 is pointed relative to the projection direction of the image , the function can be realized.

[0071] When the viewer detection unit 305 is realized using the camera 103, the viewer detection unit 305 further In addition, the attributes of the viewer may be detected (determined). The gender, age, etc. of the person in question can be detected. Alternatively, the clothing of the person in question can be determined based on the clothing of the person in question. It is also possible to detect preferences regarding the person in the image (viewer) and their belongings. Detection can be readily accomplished using a variety of known techniques.

[0072] The situation detection unit 306 detects the situation around the viewer. For example, the situation detection unit 306 detects the situation around the viewer. Based on the sound collected by the microphone 206, the surroundings of the viewer are detected. In this case, the situation detection unit 306 specifically detects, for example, the situation by the microphone 206 shown in FIG. This function can be realized.

[0073] In addition, the situation detection unit 306 detects, for example, the visual state based on the detection result of the human presence sensor 104. In this case, the situation detection unit 306 may specifically detect the situation around the awake person. For example, the function can be realized by the human sensor 104 shown in FIG. 1 and FIG. When the situation detection unit 306 is realized using the human presence sensor 104, for example, It can detect humans, animals, cars, etc. other than humans.

[0074] In addition, the situation detection unit 306 detects the visual In this case, the situation detection unit 306 may detect the surroundings of the user. For example, the function can be realized by the camera 103 shown in FIG. 1 or FIG.

[0075] When the situation detection unit 306 is realized using the camera 103, the image projection device 100 itself is moved. By moving the camera 103 and changing the shooting range of the camera 103, the range in which the situation around the viewer is detected can be changed. In this case, the situation detection unit 306 further performs the control circuit shown in FIG. Flight controller, ESC, BEC, UBEC, motor 205 in Path 202, This function can be realized by the propeller 105 shown in FIG.

[0076] The camera 103 which realizes the situation detection unit 306 detects the projection of an image by the projector 101. The lens is connected to the drone 102 in such a manner that the direction of the lens can be adjusted with respect to the direction. In this case, the attitude of the camera 103 relative to the drone 102 is adjusted to capture the surroundings of the viewer. In this case, the situation detection unit 306 may further detect the situation of the projector 10. A mechanism for adjusting the direction in which the lens of the camera 103 is pointed relative to the projection direction of the image by the camera 103. This function can be realized by the above.

[0077] When the situation detection unit 306 is realized using the camera 103, for example, In addition to obstacles such as road irregularities that may be obstacles to walking, animals, and cars, as well as obstacles that do not emit infrared rays For example, the situation detection unit 30 can be implemented by a general-purpose digital camera. By realizing 6, it is possible to reliably detect the surroundings of the viewer, especially when the surroundings are bright. can be detected.

[0078] The status detection unit 306 detects a network such as the Internet via the communication I / F 203. The situation around the viewer may be detected based on information obtained from the Specifically, the output unit 306 includes, for example, the control circuit 202 and the communication I / F 203 shown in FIG. The function can be realized by the above.

[0079] The situation detection unit 306 realized by using the communication I / F 203 detects, for example, the current position of the viewer. The occurrence of earthquakes in the area including the facility, the possibility of lightning strikes, and sudden heavy rains, also known as "guerilla downpours" The possibility of the viewer being unable to see the surroundings can be detected. The viewer's current location is , which is equivalent to the current location of the image projection device 100 as determined by the GPS receiver 204. For this reason, the situation detection unit 306 realized by using the communication I / F 203 can: Furthermore, the functionality can be realized by the GPS receiver 204 .

[0080] The situation detection unit 306 may detect the situation ahead in the moving direction of the viewer. In this case, the situation detection unit 306 may, for example, determine whether the viewer is a person based on the detection result of the viewer detection unit 305. When the movement of a viewer is detected, the viewer is located in front of the movement direction of the viewer and is located a predetermined distance from the viewer. This allows the system to detect situations in the entire surroundings of the viewer (e.g., around the viewer). This allows for quicker detection of situations compared to detecting situations within a circle of a given radius. It is possible.

[0081] The moving unit 307 is controlled by the control unit 301 and controls the movement of the image projection device 100. The image projection device 100 is moved by the moving unit 307. Specifically, the moving unit 307 can move the moving unit 101 shown in FIG. The drone 102 and the control circuit 202 shown in FIG. 2 can realize the function. More specifically, the moving unit 307 can be implemented by, for example, the control circuit 202 shown in FIG. The flight controller, ESC, BEC, UBEC, etc. in the motor shown in Figure 2 The rotor 205 rotates, which in turn rotates the propeller 105 shown in FIG. It is possible to realize this.

[0082] The control unit 301 controls, for example, the image projected by the image projection unit 303 and the image captured by the image capture unit 304. The moving unit 307 is controlled based on the captured image to move the image projection unit 303. For example, the control unit 301 controls the image projected by the image projection unit 303 and the image captured by the image capture unit 304. The camera compares the captured image with the image frame shape, and detects the objects, colors, and contrasts in the captured image. If the last, etc., differs by more than a certain threshold, the image was projected in an inappropriate location. Or, the distance between the image projection location and the image projection device 100 is inappropriate, resulting in poor image quality. The image projected by the image projection unit 303 is judged to be not clearly displayed. The image projection unit 303 is moved to a position where the image quality of the image captured by the image capture unit 304 falls within an acceptable range. The moving unit 307 is controlled to move the moving unit 307.

[0083] In this case, the control unit 301 may, for example, project the image while keeping the position at which the image is projected constant. The control section 307 is controlled so as to move the shadow portion 303. In this way, when an image is projected, In cases where there is an obstacle between the image projection unit 303 and the viewer's line of sight or visual field, This allows the viewer to see the original image without having to move his / her position.

[0084] Alternatively, in this case, the control unit 301 may determine, for example, that the image quality of the projected image is within an acceptable range. Alternatively, the moving unit 307 may be controlled so that the position where the image is projected changes to a position where the image is projected. Due to this, the area where the image was previously projected may have unevenness, etc., and the image may not be reproduced with good fidelity. In cases where the image is not projected correctly, the position where the image is projected can be changed to allow the viewer to see the original image. can be done.

[0085] In addition, the control unit 301 controls the image projection unit 303 to project the image based on the image captured by the image capture unit 304. The presence or absence of distortion in the projected image is detected, and the image projection unit 303 projects the image based on the detection result. In this case, specifically, the control unit 301 performs, for example, Even though the image projection unit 303 projects an image whose outer edge is rectangular, the image capture unit 3 If the outer edge of the image captured by 04 is not rectangular, the location where the image is projected and the projector There is an obstacle between the projector and the Projector 101 that blocks the image, or the area where the image is projected has unevenness. It is determined that the image is not projected with good reproducibility and the outer edge shape of the projected image is long. The image projection unit 303 is moved to a position where a square shape is formed.

[0086] When correcting image distortion based on the shape, the control unit 301 corrects the outer edge shape of the projected image. The control unit 304 does not necessarily have to completely match the outer edge shape of the image captured by the image capture unit 304. 301, when correcting image distortion based on shape, for example, the outer edge shape of the projected image The image is then adjusted to a position where the deviation of the outer edge shape of the image captured by the image capture unit 304 falls within a predetermined range. The image projection unit 303 may be moved. The deviation of the outer edge shape of the image may be, for example, This can be determined based on the aspect ratio of each image.

[0087] The image distortion correction by the control unit 301 can be performed by using various known image distortion correction techniques. Specifically, for example, SSIM (Structural Modeling Inference) can be implemented. Similarity), MSE (Mean Square Error Difference), PSNR (Peak Signal-to-Noise Ratio and image quality (e.g. color and tone reproduction, sharpness, graininess, etc.). Using the determination technique, distortion of the image can be corrected.

[0088] When correcting image distortion, the control unit 301 may also, for example, keep the position where the image is projected constant. The moving unit 307 may be controlled to move the image projection unit 303 in the state of projection. The moving part is arranged so that the position where the image is projected changes until the image quality becomes within an acceptable range. 307 may be controlled, so that the viewer can view the original image.

[0089] In addition, the control unit 301 controls the movement unit 307 based on the detection result of the viewer detection unit 305. Alternatively, the control unit 301 may move the image projection unit 303. When the viewer detection unit 305 detects a viewer, it approaches the viewer and projects an image around the viewer. The moving unit 307 is controlled to move the image projection unit 303 so as to project the image. The power consumption of the image projection device 100 is reduced compared to when an image is projected regardless of whether or not a viewer is present. This reduces the amount of light that can be projected, and increases the likelihood that the projected image will be seen by the viewer. This allows advertisers to achieve high advertising effectiveness, for example, when projecting advertising images. You can expect results.

[0090] Furthermore, the control unit 301 determines the movement direction of the viewer based on the detection result of the viewer detection unit 305. The moving unit 307 is controlled to move the image projection unit 303 so as to project an image forward. Specifically, the control unit 301 may, for example, detect the movement of a viewer by the viewer detection unit 305. When it detects this, it approaches the viewer and projects an image in front of the viewer in the direction of movement. In this way, the moving unit 307 is controlled to move the image projection unit 303. The power consumption of the image projection device 100 is reduced compared to when an image is projected regardless of the This also increases the likelihood that the projected image will be seen by the viewer. This allows the advertiser to achieve high advertising effectiveness, for example, when projecting an advertising image. can be expected.

[0091] In addition, the control unit 301 controls the projector 10 based on the detection result of the situation detection unit 306. The control unit 301 switches the image that the projector 101 projects. When a warning image is being projected, the situation detection unit 306 detects that a vehicle has entered within a predetermined range from the viewer. When it detects that a vehicle is approaching or approaching the vehicle, the image projected before the detection is replaced with an image of the approaching vehicle or the vehicle's surroundings. The system projects images to warn people about nearby accidents.

[0092] For example, when the projector 101 is projecting an advertisement image, the control unit 301 When the situation detection unit 306 detects the possibility of an earthquake, lightning, or sudden heavy rain, the projection Instead of images, we will display information such as the possibility of earthquakes, lightning, and sudden heavy rain, as well as evacuation routes and evacuation methods. A guide image may be projected. This makes it possible to guide a person who is out and about in an unfamiliar place. This allows appropriate responses to be taken in the event that may occur in the near future.

[0093] (An example of how the image projection device 100 is used) Next, an example of a usage mode of the image projection device 100 will be described. FIG. 1 is an explanatory diagram showing an example of a usage mode of an image projection device 100.

[0094] As shown in FIG. 4, the image projection device 100 is used in a large shopping mall or the like. The image projection device 100 can be installed and used in a parking lot 400. Depending on the size, number of parking spaces, and shape of the parking lot 400, one or more parking spaces can be deployed. Specifically, for example, in a large parking lot 400, the vehicle speed is higher than in a small parking lot 400. In addition, for example, parking lots far from stores in shopping malls will be At parking lot 400, more parking spaces are provided than at nearby parking lots 400.

[0095] Also, for example, a parking lot 400 with a large number of parking spaces is more likely to have a large number of parking spaces than a parking lot 400 with a small number of parking spaces. The number of image projection devices 100 may be the same as the number of parking spaces. Alternatively, assuming that there are two people in each vehicle on average, the number of parking spaces is doubled. More than twice as many image projection devices 100 may be provided.

[0096] In the parking lot 400, there are parking lots for charging the image projection device 100 (supplying power to the battery 201) while the image projection device 100 is waiting. A charging spot 401 may be installed to perform the above-mentioned operations. The charging spot 401 can be used to configure an image projection system. For example, power is supplied to the battery 201 by wireless power transmission.

[0097] Specifically, the charging spot 401 that supplies power by wireless power is The transmission coil is exposed to the outside. This allows the charging spot 401 to be installed outdoors without This also prevents deterioration and breakdowns caused by rain and dew. The charging spot 401 corresponding to the image projection device 100 is the charging spot 40 When in position 1, it has a terminal that comes into contact with the charging contact.

[0098] Each charging spot 401 supplies power to one image projection device 100. In this way, a plurality of image projection devices 1 may be simultaneously installed in one charging spot 401. The charging spot 401 may be a parking lot 400 equipped with a The image projection devices 100 are installed at positions according to the number of the image projection devices 100 and the size and shape of the parking lot 400. Specifically, they can be disposed so as to be almost evenly distributed, for example, as shown in FIG.

[0099] The moving range of the image projection device 100 installed in the parking lot 400 is, for example, The parking lot 400 may be located within the area indicated by the dashed line in FIG. The moving range of the image projection device 100 is specifically specified by, for example, a standard regional mesh. It is possible.

[0100] More specifically, the movement range of the image projection device 100 is, for example, a first mesh, a second mesh, The image projection device 1 can be specified by the second mesh, the third mesh, etc. The movement range of 00 is, for example, a half area mesh that is a further subdivision of the third mesh. By dividing the area into meshes such as 1 / 4 area mesh, 1 / 8 area mesh, etc. It may be specified.

[0101] By specifying the movement range of the image projection device 100 using the standard regional mesh, Based on the position information obtained by the receiver 204, the movement range of the image projection device 100 is precisely limited. The moving range of the image projection device 100 can be adjusted according to the size of the passing object and By limiting the location to within a parking lot 400 where the location can be predicted, for example, This will ensure safety by preventing accidents caused by collisions with unexpected obstacles. can.

[0102] In principle, movement within the parking lot 400 is limited to passenger cars and people, so image projection The altitude of the movement of the device 100 can also be precisely limited. In this case, the moving height of the image projection device 100 is set according to the set moving range. It can be set appropriately.

[0103] The moving range of the image projection device 100 is not limited to the parking lot 400. The movement range of the image projection device 100 can be set arbitrarily. For example, the location may be an event venue, a park, a tourist facility, a tourist spot, a residential area, etc. In any case, the movement range of the image projection device 100 can be specified by the standard area mesh.

[0104] The image projection device 100, for example, constantly moves within the parking lot 400 to detect the presence or absence of a viewer. When it detects a viewer, it approaches the viewer and starts projecting an image. For example, the image projection device 100 is placed on standby at a charging spot 401, and when a viewer is detected, The projection device may then approach the viewer and begin projecting the image.

[0105] In a parking lot 400 where a plurality of image projection devices 100 are installed, The image projection device 100 detects whether or not there is another image projection device 100 within a predetermined range from the image projection device itself. The image projection device 100 detects, for example, a human presence sensor 104 (such as an infrared sensor). The detection can be performed based on the result of the measurement, an image captured by the camera 103, or the like. The image projection devices 100 communicate with each other and transmit their current locations to each other. Therefore, the presence or absence of another image projection device 100 within a predetermined range from the own device may be detected. By detecting the presence or absence of another image projection device 100 within a predetermined range from the own device, Therefore, collisions between the image projection devices 100 can be avoided.

[0106] For example, as shown in FIG. 5, the image projection device 100 projects light from behind a viewer 501. An image 502 is projected in front of the viewer 501. This prevents the viewer 501 from moving. In addition, the image projection device 100 can project the image 502 without the need for a visual Image 502 is projected from a higher position than 501. This prevents the viewer 501 from making a sudden movement. Even if such a projection is made, the image 502 can be projected without being lost.

[0107] The image projection device 100 projects the image 502 at a predetermined angle relative to the horizontal direction, for example. When the position where the image 502 is projected is the ground, the image 502 is projected at a predetermined angle with respect to the horizontal direction. When the image projection device 100 projects the image 502, the projected image 502 is distorted into a trapezoid. Then, the image 502 is projected at the position where the image has been corrected so that there is no distortion.

[0108] In addition, when projecting the image 502, the image projection device 100 may project, for example, the drone 102. While keeping the drone 102 horizontal, adjust the attitude of the projector 101 relative to the drone 102. Specifically, for example, in the forward direction of the viewer 501, From a position higher than 501, drone 102 is held horizontally and aimed vertically downward. The image 502 may be projected.

[0109] (An example of a processing procedure of the image projection device 100) Next, an example of a processing procedure of the image projection device 100 will be described. 6 is a flowchart showing an example of a processing procedure of the device 100. First, it is determined whether or not a viewer 501 has been detected (step S601).

[0110] In step S601, for example, the human sensor 104 or the camera 103 is used. In step S601, the presence or absence of a viewer 501 around the image projection device 100 is determined. In this case, the presence or absence of a person with vision 501 is detected, and when a person with vision 501 is detected, the person with vision is identified. The presence or absence of movement of the sage 501 may be detected.

[0111] In step S601, if a viewer 501 is detected (step S601: Yes ), move to the vicinity of the detected viewer 501 (step S602), and An image 502 is projected onto the surroundings (step S603). For example, an image 502 is projected onto the ground (the ground, the floor, etc.) at the feet of a viewer 501. In 603, for example, when the movement of the viewer 501 is detected, the movement of the viewer 501 is In step S603, the image 502 is projected in the forward direction. When the movement of the viewer 501 is detected, the image 5 is displayed on a wall or the like located in front of the viewer 501 in the direction of movement. 02. The image may be projected in a ring around the viewer 501.

[0112] Furthermore, in step S603, the image 502 is projected and the speaker 2 is 07 may output a sound. By outputting a sound, the attention of the viewer 501 is attracted. This allows the viewer 501 to more reliably view the projected image.

[0113] Next, in step S603, it is determined whether the projected image is in good condition (step In step S604, for example, the image projected by the image projection unit 303 is The image is compared with the image captured by the image capture unit 304, and the shape of the outer frame in each image and the captured image are compared. The deviations in objects, colors, contrast, etc. in the captured images are within a certain threshold. Based on whether or not the projected image is in a good condition, it is determined whether or not the projected image is in a good condition.

[0114] In step S604, if the image condition is good (step S604: Yes), On the other hand, if the image quality is not good in step S604, the process proceeds to step S606. If not (step S604: No), the image condition is adjusted (step S605). The processes in steps S604 and S605 are repeated while the image 502 is being projected. Do it.

[0115] In step S605, for example, the image projected by the image projection unit 303 and the image capturing unit 3 04 and the image captured by the camera, and the position where the image is projected on the ground, floor, wall, etc. is determined In this state, the image projected by the image projection unit 303 is compared with the image captured by the image capture unit 304. The image condition is adjusted by moving the image to a position where the image quality falls within an acceptable range.

[0116] In step S605, for example, the image projected by the image projection unit 303 and the captured image are Based on the image captured by the shadow unit 304, the ground is adjusted until the image quality of the projected image falls within an acceptable range. By moving the screen to change the position where the image is projected on the surface, floor, wall, etc. , the image condition may be adjusted.

[0117] Regardless of the method used to adjust the image condition, the viewer must be constantly or at regular intervals. The position of 501 is detected, and an image 502 is projected within the range of the viewer 501. In addition, the image quality can be improved by maintaining a good image quality and adjusting the ground and floor conditions when the viewer 501 moves. In cases where it is difficult to adjust the projection position of the image on a screen or wall, for example, The adjustment of the projection position of the image according to the movement of the viewer 501 is prioritized over maintaining the state of the image. Or, when it is difficult to achieve both, for example, the projection position of the image according to the movement of the viewer 501 may be changed. Prioritizing the maintenance of a good image condition over adjustment, the image 501 is placed slightly away from the viewer 501. 02 may be projected.

[0118] Also, while the image 502 is being projected, the visual field detected in step S601: Yes The surroundings of the awake person 501 are detected (step S606). For example, a human sensor 104 (infrared sensor) or a camera 103 is used to detect the presence of a visual person 5. Then, the surroundings of the viewer 501 detected in step S606 are detected. Based on the surrounding situation, it is determined whether there is an obstacle or the like around the viewer 501 ( Step S607). In step S607, for example, the target viewer 501 Within a certain range centered on the target, there are obstacles such as vehicles, signs, cones, and fences, and obstacles other than the visual person 501. In step S607, the viewer 501 determines whether there is a person, a moving vehicle, or the like. If there are no obstacles around the vehicle (step S607: No), the process proceeds to step S606. , and continues to detect the situation around the viewer 501.

[0119] In step S607, if there is an obstacle around the viewer 501 (step S6 07: Yes), and it is determined whether or not a warning is required (step S608). In step S608, for example, if the detected obstacle is present ahead of the viewer 501 in the moving direction, or whether another person or a moving vehicle is approaching the viewer 501. In step S608, it is determined whether or not a warning is necessary. If the answer is NO (step S608: No), the process proceeds to step S606. Continue to detect the situation.

[0120] In step S608, if a warning is required (step S608: Yes) Then, the image 502 for calling attention is projected (step S609). For example, a warning image may be superimposed on a part of the image being projected. The image 502 may be projected on the remaining area to attract attention. This makes it possible to ensure the reliability of advertisement display performance.

[0121] Alternatively, in step S609, for example, the image being projected may be switched to a warning. In this way, the viewer 501 can see the image 502 of the viewer. The system reliably conveys to the viewer 501 that there is a change in the situation around the viewer, and shifts the viewer's attention from the image to the viewer. The system can be oriented to the surroundings of the viewer 501, ensuring the safety of the viewer 501. .

[0122] In step S609, the image 502 for calling attention is projected and the speaker 207 outputs a warning sound such as a buzzer or alarm sound. By outputting such a sound, the attention of the viewer 501 can be attracted and the viewer can easily understand the situation. The visually impaired 501 can reliably recognize that a disaster may occur within a specified time period after the time point. It can be made aware of this.

[0123] Then, it is determined whether or not the warning is no longer necessary (step S610). In 610, for example, the vehicle is detected from within a predetermined range centered on the target viewer 501. There may be obstacles such as cars, signs, cones, and fences, people other than the person in sight, or moving vehicles. Based on whether the object is no longer present, it is determined whether a warning is no longer necessary.

[0124] In step S610, the warning is not yet unnecessary, i.e., the warning is not yet unnecessary. If it is necessary (step S610: No), the image 502 for calling attention is continuously projected. On the other hand, in step S610, if the warning is no longer necessary, If so (step S610: Yes), the projection of the attention-calling image is stopped and the image 502 is projected. (Step S611).

[0125] In step S611, for example, based on image information stored in the memory, Alternatively, in step S611, for example, If there is an image whose projection was interrupted in step S609, the projection of the interrupted image is resumed. This allows all advertisements to be projected, and the advertiser can easily see the advertisements. The reliability of the displayed results can be ensured.

[0126] Then, it is determined whether or not the boundary of the movement range set in the image projection device 100 has been exceeded (step If the boundary of the movement range is not exceeded (step S612: No), the The process proceeds to step S611 to continue the projection of the image. On the other hand, in step S612, When the boundary of the movement range set in the image projection device 100 is exceeded (step S612: Yes s), move into the moving range (step S613), and project the image 502 within the moving range. do.

[0127] When moving within the moving range, the image that was moving before crossing the boundary of the moving range is The projection of the image 502 may be interrupted or may be continued. If the boundary of the moving range is exceeded in step S612: Yes, the vehicle moves to the charging spot 401. In this case, on the way to the charging spot 401, another visual When a viewer 501 is detected, the image 502 is projected onto the viewer 501. good.

[0128] In step S601, if the viewer 501 is not detected (step S601: If no, it is determined whether or not a situation related to a disaster or the like has occurred (step S614). In step S614, for example, Based on the information, it is possible to predict that earthquakes, lightning, sudden heavy rains, and other disasters will occur within a specified time from the present time. Determine whether it occurs.

[0129] In step S614, if the occurrence of a disaster or other situation is not detected (step If the user 501 is detected, the process proceeds to step S601. On the other hand, if the occurrence of a disaster or other situation is detected in step S614 ( (Step S614: Yes) Even if the viewer 501 is not detected, the parking lot 4 00 (step S615), proceed to step S609, and display the warning image 5 Project 02.

[0130] In this case, in step S609, the possibility of a disaster occurring within a predetermined time from the current time is calculated. In this case, a warning image 502 is projected to inform the user that there is a possibility of the user being injured. The projection of the image 502 is performed while moving along a predetermined route within the parking lot 400. The movement may be started in response to the detection of the occurrence of a disaster or other situation, and may be performed as soon as possible. An image 502 for calling attention may be projected around the viewer 501 who is detected first.

[0131] In addition, the image projection device 100 may project a signal at any time or at predetermined intervals while moving (flying). The remaining battery level of the device's battery 201 and the current location of the device are checked, and the remaining battery level is checked. A vehicle that can reach the charging spot 401 or a pre-determined charging spot 401 Image 502 is projected while the remaining charge of battery 201 is secured. This avoids the risk of the battery 201 running out and dropping during projection, and prevents the viewer 501 from Safety can be ensured.

[0132] Charging spot 401 is equipped with a wireless router for wireless communication such as Wi-Fi. In this way, each image projection device 100 can communicate with the other image projection devices 100 via a nearby wireless router. In addition, each of the multiple charging spots 401 has a wireless router. By providing such a system, a good communication environment can be ensured.

[0133] The charging spot 401 may also include a human sensor 104. Only when a viewer 501 is detected, the image projection device 100 is moved from the charging spot 401. 502 can be projected on a viewer 501. Cut.

[0134] In the case of a parking lot 400 in which a plurality of image projection devices 100 are installed, the movement ranges of the image projection devices 100 overlap. In an environment where multiple image projection devices 100 exist, while the image 502 is being projected, When the remaining charge of the battery 201 of the image projection device 100 becomes insufficient, the image projection device 100 returns to the charging spot 401. When it becomes necessary to charge the image projector 100, at least one of the other image projector 100 and the charging spot 401 is used. By communicating with the other image projection device 100, another image projection device 100 can be called and a new image can be started during projection. The image inside may be taken over by another image projection device 100 and projected.

[0135] This allows the viewer 501 to view an image ( You can view a series of videos or other content without interruption. Allowing uninterrupted viewing of images that require a certain amount of time to be displayed (such as a video sequence) This makes it possible to ensure the reliability of the advertisement display performance for the advertiser.

[0136] In addition, in an environment where there are multiple image projection devices 100 with overlapping movement ranges, An image 502 is projected using a plurality of image projection devices 100 each of which displays a different image. Specifically, for example, each of the multiple image projection devices 100 may project a single image. Images of different regions in the image (e.g., the top right, bottom right, top left, and bottom left quadrants) By projecting the multiple images, a single image 502 can be projected as a whole. This allows for a clearer picture than when an image of the same size is projected by a single image projection device 100. and project a large image 502 without reducing color, contrast, etc. It is possible.

[0137] Specifically, for example, the images projected by the multiple image projection devices 100 are Each pixel in the image is interpolated between pixels in the image projected by another image projection device 100. Such an image 502 may be projected. This prevents the weight of the image projection device 100 from increasing. The image projection device 100 does not need to be enlarged, and the liquid crystal panel of the projector 101 is The number of pixels in the projected image 502 is increased without reducing the light receiving area of ​​the panel. This allows a high-definition image 502 to be projected.

[0138] Specifically, for example, a plurality of image projection devices 100 may project the same image 5 in the same location. This can reduce the weight of the image projection device 100 and the size of the image projection device. It provides clear color and contrast even in the daytime, without making the monitor larger. A panoramic image 502 can be projected.

[0139] The image projection device 100 projects a projector based on an image captured by the camera 103. The motion of the viewer 501 of the image 502 projected by the camera 101 is detected, and the viewer 501 moves in a predetermined manner. When the above gesture is performed, the projection mode of the image 502 may be changed. stomach.

[0140] Specifically, for example, when the viewer 501 pinches out, the image The image 502 is enlarged and projected. The enlargement of the image 502 is performed by projecting the image 502 from the position where the image 502 is projected. This can be achieved by increasing the distance to the ejector 101, as described above. A plurality of image projection devices 100 each display an image of a different region of a single image. This may also be done by:

[0141] In this way, by enlarging and projecting the image 502, for example, the name of the store, business hours, An image 502 of an advertisement including text informing of benefits, etc., and an image of a product such as clothing or accessories While the image 502 is being projected, a viewer 501 who is interested in the image 502 looks at the image. The details of the image 502 can be confirmed. This allows the viewer 501 to, for example, Since you can check the details of the products included in 502, you can further interest in the products. Therefore, a high advertising effect can be expected.

[0142] When the image 502 is enlarged, information that was not included in the image 502 before enlargement is added to the image. Specifically, for example, an image of a product such as clothing or accessories may be projected. While the image 502 was being projected, the viewer 501 performed a pinch-out motion. In this case, an image 502 is projected showing the enlarged product and its price, stock status, etc. Good too.

[0143] Also, for example, from the current position of the image projection device 100 to a store desired by the viewer 501 When a map image 502 is being projected, the corresponding viewer 501 pinches out. When this is done, an image 502 including an enlarged map and the names of facilities included in the map is This allows the viewer 501 to be reliably guided to the desired store. Cut.

[0144] Specifically, for example, when the viewer 501 performs a pinch-in action, The image 502 is reduced and projected. The reduction of the image 502 is performed by projecting the image 502 from the position where the image 502 is projected. This can be achieved by shortening the distance to the projector 101. This may be done by reducing the size of the image 502 .

[0145] Alternatively, for example, when the viewer 501 pinches in, a wide-angle image Specifically, for example, the image may be projected from the current position of the image projection device 100 to the viewer 5. While the image 502 of the map to the desired store is being projected by the viewer 501, the viewer pinches his / her finger. When the in operation is performed, a wider range of map image 502 is projected. A visual observer 501 can ascertain his / her current location within the entire facility.

[0146] Specifically, for example, when the viewer 501 makes a predetermined gesture, In this case, the image 502 being projected may be switched to another image 502. You can switch the image (video) 502 at any time like zapping to find your favorite image. Image 502 can be viewed.

[0147] In the above embodiment, the movement range of the image projection device 100 is limited to within the parking lot. Although an example has been described, the present invention is not limited to this. Any suitable movement range may be set. In this case, it is not necessary to set the moving range. Since the camera 103 is integrated with the camera 102, the image can be displayed according to the intention of the viewer 501 at any location. An image 502 can be projected.

[0148] Specifically, for example, in an outdoor location such as a campsite, an image 502 is placed on a tent. This provides a stable support for fixing the projector 101. Even in outdoor locations where there is no stand, screen or wall to project images, the location of the visually impaired person 501 can be easily recognized. It is possible to project an image 502 according to the user's intention.

[0149] In the above-described embodiment, the drone 102 equipped with the projector 101 The example of moving the projector 101 has been described above. 1 is not limited to being moved by a drone 102. For example, In an environment with ceilings and walls, the projection is performed on a moving object that moves along the ceiling or wall. The projector 101 is mounted on the moving object, and the projector 101 is moved by the movement of the moving object. It may be arranged so that the slits are not cut off (see FIG. 7).

[0150] <Another embodiment> FIG. 7 is a diagram showing an image projection device and a moving ring of the image projection device according to another embodiment of the present invention. FIG. 7 is an explanatory diagram showing an example of a boundary. In FIG. 7, the same parts as those in the above-described embodiment are As shown in FIG. 7, the image projection device 700 includes a moving body 701. The moving body 701 includes a main body 702, a rolling body 703, a magnet 704, and a slide shoe. It is equipped with 705.

[0151] The main body 702 is substantially box-shaped, and contains the control circuit 202, an antenna, a motor, a battery, etc. The control circuit 202 is composed of a CPU, a memory, etc., and controls the image It drives and controls each part of the projection device 700. The motor 205 connected to the roller 703 is driven and controlled to rotate the roller 703, thereby projecting the image of the image projection device 700. Move.

[0152] The rolling element 703 is connected to the main body 702 so as to be rotatable (rollable). The rolling element 703 protrudes toward the ceiling 706 and the wall 707 from the end face of the main body 702. It is preferable that three or more units 03 are provided. This makes it possible to stably operate the image projection device 700. This allows the device to be moved smoothly.

[0153] Specifically, the rolling element 703 is realized by, for example, a roller, a ball, or a roller. By implementing the rolling body 703 using balls or rollers, the moving body 70 1. The turning radius can be reduced, allowing for greater maneuverability and greater freedom of movement. When the rolling elements 703 are realized by rollers, the toe angle and caster -Adjust the angle as appropriate.

[0154] The magnet 704 is provided on the same side of the main body 702 as the rolling element 703. 704 allows the image projection device 100 to be attached to a ceiling 706 or a wall 707 by magnetic force. The slide shoe 705 is in the shape of a sheet or a flat plate. The magnetic force of the magnet 704 that attracts the projection device 700 to the ceiling 706 or the wall 707 is not damaged, and the image The slide is made of a material that does not provide resistance to the movement of the image projection device 100. Specifically, the shoe 705 may be made of, for example, hard silicone rubber. can.

[0155] The end face of the slide shoe 705 opposite to the main body is the tip of the rolling element 703 (rolling element 70 3) the position of contact with the ceiling 706 or wall 707) or slightly toward the main body side. This allows the rolling element 703 to be mounted on the ceiling 706 or the wall 70 7, the image projection device 100 can be moved smoothly. .

[0156] The slide shoe 705 is provided so as to be movable toward and away from the magnet 704 or the main body 702. Specifically, for example, the slide shoe 705 may be provided with a magnet 704 or The main body 702 may be connected to the main body 702 via an elastic member such as a spring. This allows the rolling element 703 to be in reliable contact with the ceiling 706 or the wall 707, and the image projection device 100 can be moved around nicely.

[0157] Such an image projection device 700 uses the GPS receiver 204 as described above to determine the current location. The image projection device 700 may specify, but is not limited to, PH Triangle used in S (Personal Handy-phone System) The current position may be identified by using the principle of surveying. A plurality of PHS base stations (not shown) are provided in 707, and the signals output from these base stations are The location of the device is identified by receiving radio waves via an antenna.

[0158] As a result, it is difficult to receive radio waves from GPS satellites due to the presence of ceiling 706 and wall 707. Even in such an environment, the position of the image projection device 700 can be identified and controlled with high accuracy. This allows the image 502 to be projected at any position within the building. The image projection device 700 moves along the ceiling 706 and the wall 707, so that the viewer 501 does not collide with the image projection device 700. This can reliably prevent collisions and ensure the safety of the viewer 501.

[0159] As described above, the image projection device 100 according to the embodiment of the present invention projects the image 50 A projector 101 that projects the image 2 and a drone 10 that moves the projector 101 2, and controls the drone 102 in association with the projection of the image 502 by the projector 101. and a control circuit 202 for controlling the operation of the sensor.

[0160] In addition, the image projection device 700 according to the embodiment of the present invention projects the image 502. A projector 101, a moving body 701 that moves the projector 101, and a projector A control circuit 202 for controlling a moving body 701 in association with the projection of an image 502 by a projector 101; The present invention is characterized by the inclusion of:

[0161] According to the image projection devices 100 and 700 of the embodiments of the present invention, the projector By moving the projector 101 in relation to the projection of the image 502 by the projector 101, This makes it possible to project images easily and reliably in any desired location, regardless of the environment. In addition, according to the image projection devices 100 and 700 of the embodiments of the present invention, To easily and reliably project large images at desired locations regardless of the environment. This allows the viewer 501 to view a large-sized image at any location. You can see and enjoy.

[0162] Further, the image projection devices 100 and 700 according to the embodiments of the present invention are projectors. The projector 101 is equipped with a camera 103 for capturing the projected image, and the projector 101 is equipped with a control circuit 202 for controlling the projector 103. The drone 10 detects the location of the drone based on the image projected by the vector 101 and the image captured by the camera 103. 2 and a moving object 701 to move the projector 101.

[0163] According to the image projection devices 100 and 700 of the embodiments of the present invention, the image 502 is projected. During the shadowing, an obstacle such as a person is between the location where the image 502 is to be projected and the projector 101. If the projected image 502 is partially or completely lost due to an obstacle, By moving the projector 101 to a location where the image is not lost due to people or To reliably project an image 502 in the same place regardless of changes in the environment such as the movement of objects It is possible.

[0164] Such image projection devices 100 and 700, for example, can be used without the burden of advertising fees paid by advertisers. The image projection device 100 is suitable for projecting an advertisement image 502. By projecting the image 502, the viewer 501 can see the advertisement image 502 with a high probability. This improves the reliability of the exposure record of the advertisement image 502, and the advertiser can Advertising effects can be expected.

[0165] In addition, the image projection devices 100 and 700 according to the embodiments of the present invention include a control circuit 202 However, based on the image captured by the camera 103, the image 50 projected by the projector 101 is 2, and based on the detection result, the projector 101 projects an image having a distortion. The feature of this method is that it performs correction only when the

[0166] According to the image projection devices 100 and 700 of the embodiments of the present invention, the projector By correcting the distortion of the image 502 projected by the image projector 101, the image 502 is projected on the location where the image 502 is to be projected. Regardless of the type of image, the viewer 501 is allowed to view an image 502 without distortion, and the viewer 501 does not feel any discomfort or discomfort. You can avoid feeling uncomfortable.

[0167] Such image projection devices 100 and 700 are particularly suitable for projecting images including letters, numbers, maps, etc. It is useful for projecting images on any surface, for example, on uneven surfaces such as walls or floors. Even when the image is projected, the contents of the guidance of the projected image 502 can be reliably conveyed to the viewer 501. This can be done.

[0168] Further, the image projection devices 100 and 700 according to the embodiments of the present invention are projectors. A human presence sensor 104 and a camera detect a viewer 501 who sees the image projected by 101. 103, the control circuit 202 detects Based on the result, the drone 102 or the moving object 701 is controlled to move the projector 101. Its feature is that it

[0169] According to the image projection devices 100 and 700 of the embodiments of the present invention, the viewer detection unit 3 By moving the projector 101 based on the detection result of 05, the image 502 is Since the projection location can be changed, the image 502 projected by the projector 101 can be This ensures that the viewer 501 can see.

[0170] In addition, the image projection devices 100 and 700 according to the embodiments of the present invention are The system includes a situation detection unit 306 such as a human sensor 104 and a camera 103 for detecting the surrounding situation. Based on the detection result of the status detection unit 306, the control circuit 202 Its special feature is the ability to switch the image it projects.

[0171] According to the image projection devices 100 and 700 of the embodiments of the present invention, By switching the image 502 projected by the projector 101 according to the surrounding conditions, , a viewer 501 can view an appropriate image 502.

[0172] Specifically, for example, when a vehicle is detected to have entered within a predetermined range from the viewer 501, In this case, instead of the image 502 that was projected before the detection, the image 503 showing the approach of a vehicle or an event caused by the approach of a vehicle is displayed. By projecting an image 502 that calls attention to the object, the viewer 501 focuses on the image 502. This can prevent accidents caused by distraction from the surroundings.

[0173] Specifically, for example, the occurrence of a sudden change in the weather or an earthquake in the location where the viewer 501 is located can be detected. When an alarm is detected, the image 502 that was projected before the alarm is replaced with an image showing the possibility of a sudden change in weather or safety. By projecting an image 502 that encourages evacuation to a safe place, the viewer 501 is informed of the unexpected It can prepare you for the occurrence of an emergency.

[0174] In addition, the image projection devices 100 and 700 according to the embodiments of the present invention include a control circuit 202 Based on the detection result of the viewer detection unit 305, the movement of the viewer 501 is detected, and the viewer 50 The drone 102 or the moving object 701 is controlled so as to project the image 502 in the forward direction of the moving object 1. , the projector 101 is moved.

[0175] According to the image projection devices 100 and 700 of the embodiments of the present invention, The projector 101 is moved so as to project an image 502 forward in the moving direction of 501. This makes it possible to change the location where the image 502 is projected according to the movement of the viewer 501. Therefore, the image 5 projected by the projector 101 can be projected without interfering with the movement of the viewer 501. 02 can be reliably seen by the viewer 501.

[0176] Such image projection devices 100 and 700 are used in leisure facilities such as theme parks. 400 parking lots, such as shopping malls, or large parking lots attached to these facilities In such a case, according to the movement of a visually impaired person 501 who is a user of the facility, the Images advertising attractions, stores, etc., or introducing special offers, or the location of the attractions, stores, etc. Or it is suitable for projecting images that guide the route to the attraction or store. .

[0177] Alternatively, such an image projection device 100, 700 may be configured to project a light image based on, for example, the movement of a viewer 501. Advertisements and offers for attractions, stores, etc. located in a different direction (for example, behind) Images of attractions, stores, etc. An image 502 showing route guidance in the vehicle may be projected.

[0178] By projecting these images 502 using the image projection devices 100 and 700, To convey information about attractions, stores, etc. without interfering with the movement of the person 501 This can improve the convenience of the visually impaired person 501. Compared to advertisements and other information, information about attractions, stores, etc. is displayed to the visually impaired for a long period of time. 501, advertisers can expect high advertising effectiveness.

[0179] In addition, the image projection devices 100 and 700 according to the embodiments of the present invention are A situation detection unit 30 such as a human sensor 104 and a camera 103 that detects the situation ahead in the moving direction 6, and the control unit 301 controls the image projection unit to Its special feature is the ability to switch the image it projects.

[0180] According to the image projection devices 100 and 700 of the embodiments of the present invention, By switching the image 502 projected by the projector 101 according to the situation ahead, Therefore, it is possible to provide useful information according to the movement of the viewer 501.

[0181] Specifically, for example, if there is an obstacle such as a person or a vehicle in front of the viewer 501, In this case, the viewer 501 continues to move aimlessly while concentrating on the image 502. This can prevent accidents from occurring.

[0182] The image projection method described in this embodiment uses a program prepared in advance. By running it on a computer such as a personal computer or workstation This program can be used on hard disks, CD-ROMs, MOs, DV It is recorded on a computer-readable recording medium such as a USB memory or SSD, and The program is executed by reading it from the recording medium by a computer. A program is a transmission medium that can be distributed over a network such as the Internet. This is also possible. [Industrial Applicability]

[0183] As described above, the image projection device according to the present invention is useful as an image projection device for projecting an image. This is particularly suitable for an image projection device that moves and projects an image. [Explanation of symbols]

[0184] 100 Image projection device 101 Projector 102 Drone 103 Camera 104 Human Sensor 400 Parking 401 Charging Spot 501 Visionary 502 images

Claims

1. an image projection unit that projects an image; A moving unit that moves the image projection unit; a control unit that controls the moving unit in association with the projection of an image by the image projection unit; An image projection device comprising:

2. a photographing unit that photographs the image projected by the image projection unit, The control unit determines whether or not the image is projected by the image projection unit and the image captured by the image capture unit.

2. The method according to claim 1, wherein the moving unit is controlled by a control unit for moving the image projection unit. Image projection device.

3. The control unit controls the image projected by the image projection unit based on the image captured by the imaging unit. and correcting the distortion of the image projected by the image projection unit based on the detection result.

3. The image projection device according to claim 2, wherein the image projection device performs the above-mentioned operation.

4. a viewer detection unit that detects a viewer who views the image projected by the image projection unit, The control unit controls the moving unit based on a detection result of the viewer detection unit, and 4. The image projection device according to claim 1, wherein the projection unit is movable. 。

5. A situation detection unit is provided that detects a situation around the viewer, The control unit controls the image projection unit to project an image based on a detection result of the situation detection unit.

5. The image projection device according to claim 4, wherein the image projection device is switched between the above-mentioned.

6. The control unit detects the movement of the viewer based on the detection result of the viewer detection unit, The moving unit is controlled so as to project an image forward in the moving direction of the viewer, and the image projection unit is 6. The image projection device according to claim 4, wherein the image projection device is movable.

7. A state in which the image projection unit detects a situation ahead in a moving direction of a viewer who visualizes the projected image. A status detection unit is provided, The control unit controls the image projection unit to project an image based on a detection result of the situation detection unit.

7. The image projection device according to claim 1, wherein the above-mentioned is switched.

Images