Control device, control method, control program, and projection system

Abstract

The present invention provides a control device, a control method, a control program, and a projection system that make it possible to facilitate the operation of projection control by a simple structure.　A control device (4) acquires, on the basis of a first operation from an operator (51), information by which the size of a projection area (11) produced by a projection device (10) can be specified. Furthermore, when a second operation on the projection area (11) from the operator (51) is detected, the control device (4) controls projection by the projection device (10) on the basis of the acquired information and the detected second operation.

Description

Technical Field

[0001] The present invention relates to a control device, a control method, a control program, and a projection system.

Background Art

[0002] Patent Document 1 describes a configuration in an electronic zoom function that inputs size information representing the size or shape of an optical image and changes the size or shape of a formation area for forming the optical image based on the input data. To move the formation area, a notification prompting the input of position information is given, and the size or shape change and the movement are continuously performed.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

[0004] One embodiment of the technology according to the present disclosure provides a control device, a control method, a control program, and a projection system that can simplify the configuration and facilitate the operation of projection control.

Means for Solving the Problems

[0005] A control device according to one embodiment of the technology according to the present disclosure includes a processor that acquires information capable of specifying the size of a projection area by a projection device based on a first operation from an operator, and controls the projection by the projection device based on the acquired information and the second operation when detecting a second operation from the operator with respect to the projection area.

[0006] The control method according to one embodiment of the technology disclosed herein is such that a processor of a control device that controls projection by a projection device acquires information capable of specifying the size of a projection area by the projection device based on a first operation from an operator, and controls the projection by the projection device based on the acquired information and the second operation in a state where a second operation from the operator on the projection area is detected.

[0007] The control program according to one embodiment of the technology disclosed herein causes a processor of a control device that controls projection by a projection device to acquire information capable of specifying the size of a projection area by the projection device based on a first operation from an operator, and execute a process of controlling the projection by the projection device based on the acquired information and the second operation in a state where a second operation from the operator on the projection area is detected.

[0008] The projection system according to one embodiment of the technology disclosed herein includes a projection device and a control device including a processor that acquires information capable of specifying the size of a projection area by the projection device based on a first operation from an operator, and controls the projection by the projection device based on the acquired information and the second operation in a state where a second operation from the operator on the projection area is detected.

Advantages of the Invention

[0009] According to the present invention, it is possible to provide a control device, a control method, a control program, and a projection system that can simplify the configuration and facilitate the operation of projection control.

Brief Description of the Drawings

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Embodiments for Carrying Out the Invention

[0011] Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.

[0012] <Schematic Configuration of Projection Device 10 of Embodiment> FIG. 1 is a schematic diagram showing the schematic configuration of the projection device 10 of the embodiment.

[0013] The projection device 10 includes a projection unit 1, a control device 4, and an operation reception unit 2. The projection unit 1 is configured by, for example, a liquid crystal projector or a projector using LCOS (Liquid Crystal On Silicon). Hereinafter, it will be described assuming that the projection unit 1 is a liquid crystal projector.

[0014] The control device 4 is an example of the control device of the present invention that controls the projection by the projection device 10. The control device 4 includes a control unit configured by various processors, a communication interface (not shown) for communicating with each unit, and a storage medium 4a such as a hard disk, an SSD (Solid State Drive), or a ROM (Read Only Memory), and comprehensively controls the projection unit 1. The various processors of the control unit of the control device 4 include a CPU (Central Processing Unit) which is a general-purpose processor that executes programs to perform various processes, a programmable logic device (PLD) which is a processor whose circuit configuration can be changed after manufacturing such as an FPGA (Field Programmable Gate Array), or a dedicated electric circuit which is a processor having a circuit configuration specifically designed to execute specific processes such as an ASIC (Application Specific Integrated Circuit).

[0015] The structures of these various processors are, more specifically, electric circuits formed by combining circuit elements such as semiconductor elements. The control unit of the control device 4 may be constituted by one of the various processors, or may be constituted by a combination of two or more processors of the same type or different types (for example, a combination of a plurality of FPGAs or a combination of a CPU and an FPGA).

[0016] The operation reception unit 2 detects an instruction (user instruction) from the user by receiving various operations from the user. The operation reception unit 2 may be a button, key, joystick, etc. provided in the control device 4, or may be a reception unit that receives a signal from a remote controller that remotely operates the control device 4.

[0017] The object to be projected 6 is an object such as a screen having a projection surface on which a projection image is displayed by the projection unit 1. In the example shown in FIG. 1, the projection surface of the object to be projected 6 is a rectangular plane. It is assumed that the up, down, left, and right directions of the object to be projected 6 in FIG. 1 are the up, down, left, and right directions of the actual object to be projected 6.

[0018] The projection area 11 illustrated by the dashed-dotted line is an area of the object to be projected 6 that is irradiated with projection light by the projection unit 1. In the example shown in FIG. 1, the projection area 11 is rectangular. The projection area 11 is part or all of the projectable range that can be projected by the projection unit 1.

[0019] Note that the projection unit 1, the control device 4, and the operation reception unit 2 are realized by, for example, one device (see FIGS. 3 and 4 for example). Or, the projection unit 1, the control device 4, and the operation reception unit 2 may be separate devices that cooperate by communicating with each other.

[0020] <Internal Configuration of Projection Unit 1 Shown in FIG. 1> FIG. 2 is a schematic diagram showing an example of the internal configuration of the projection unit 1 shown in FIG. 1.

[0021] As shown in FIG. 2, the projection unit 1 includes a light source 21, a light modulation unit 22, a projection optical system 23, and a control circuit 24.

[0022] The light source 21 includes a light-emitting element such as a laser or an LED (Light Emitting Diode), and emits, for example, white light.

[0023] The light modulation unit 22 is composed of three liquid crystal panels that modulate each color light emitted from the light source 21 and separated into three colors of red, blue, and green by a color separation mechanism (not shown) based on image information, and emit each color image. Red, blue, and green filters may be mounted on these three liquid crystal panels respectively, and the white light emitted from the light source 21 may be modulated by each liquid crystal panel to emit each color image.

[0024] The projection optical system 23 is where the light from the light source 21 and the light modulation unit 22 is incident, and is composed of, for example, a relay optical system including at least one lens. The light that has passed through the projection optical system 23 is projected onto the object to be projected 6.

[0025] Among the object to be projected 6, the area irradiated with the light that passes through the entire range of the light modulation unit 22 becomes the projectable range that can be projected by the projection unit 1. Among this projectable range, the area irradiated with the light that actually passes through the light modulation unit 22 becomes the projection area 11. For example, by controlling the size, position, and shape of the area where light passes through the light modulation unit 22, the size, position, and shape of the projection area 11 change within the projectable range.

[0026] The control circuit 24 controls the light source 21, the light modulation unit 22, and the projection optical system 23 based on the display data input from the control device 4, so as to project an image based on this display data onto the object to be projected 6. The display data input to the control circuit 24 is composed of three types: red display data, blue display data, and green display data.

[0027] Further, the control circuit 24 changes the projection optical system 23 based on an instruction input from the control device 4, thereby enlarging or reducing the projection area 11 (see FIG. 1) of the projection unit 1. Further, the control device 4 may move the projection area 11 of the projection unit 1 by changing the projection optical system 23 based on an operation from the user received by the operation reception unit 2.

[0028] Further, the projection device 10 includes a shift mechanism that mechanically or optically moves the projection area 11 while maintaining the image circle of the projection optical system 23. The image circle of the projection optical system 23 is an area where the projection light incident on the projection optical system 23 properly passes through the projection optical system 23 in terms of light quantity drop, color separation, peripheral curvature, etc.

[0029] The shift mechanism is realized by at least one of an optical system shift mechanism that performs an optical system shift and an electronic shift mechanism that performs an electronic shift.

[0030] The optical system shift mechanism is, for example, a mechanism that moves the projection optical system 23 in a direction perpendicular to the optical axis (see FIGS. 3 and 4, for example), or a mechanism that moves the light modulation unit 22 in a direction perpendicular to the optical axis instead of moving the projection optical system 23. Further, the optical system shift mechanism may combine the movement of the projection optical system 23 and the movement of the light modulation unit 22.

[0031] The electronic shift mechanism is a mechanism that performs a pseudo shift of the projection area 11 by changing the range of light transmission in the light modulation unit 22.

[0032] Further, the projection device 10 may include a projection direction change mechanism that moves the projection area 11 together with the image circle of the projection optical system 23. The projection direction change mechanism is a mechanism that changes the projection direction of the projection unit 1 by changing the orientation of the projection unit 1 by mechanical rotation (see FIGS. 3 and 4, for example).

[0033] <Mechanical Configuration of Projection Device 10> FIG. 3 is a schematic diagram showing the external configuration of the projection apparatus 10. FIG. 4 is a schematic cross-sectional view of the optical unit 106 of the projection apparatus 10 shown in FIG. 3. FIG. 4 shows a cross-section in a plane along the optical path of the light emitted from the main body unit 101 shown in FIG. 3.

[0034] As shown in FIG. 3, the projection apparatus 10 includes a main body unit 101 and an optical unit 106 provided so as to protrude from the main body unit 101. In the configuration shown in FIG. 3, the operation reception unit 2, the control device 4, and the light source 21, the light modulation unit 22, and the control circuit 24 in the projection unit 1 are provided in the main body unit 101. The projection optical system 23 in the projection unit 1 is provided in the optical unit 106.

[0035] The optical unit 106 includes a first member 102 supported by the main body unit 101 and a second member 103 supported by the first member 102.

[0036] Note that the first member 102 and the second member 103 may be an integrated member. The optical unit 106 may be configured to be detachable (in other words, replaceable) from the main body unit 101.

[0037] The main body unit 101 has a housing 15 (see FIG. 4) in which an opening 15a (see FIG. 4) for passing light is formed at a portion connected to the optical unit 106.

[0038] Inside the housing 15 of the main body unit 101, as shown in FIG. 3, a light source 21 and a light modulation unit 12 including a light modulation unit 22 (see FIG. 2) that spatially modulates the light emitted from the light source 21 based on input image data to generate an image are provided.

[0039] The light emitted from the light source 21 is incident on the light modulation unit 22 of the light modulation unit 12 and is spatially modulated and emitted by the light modulation unit 22.

[0040] As shown in FIG. 4, the image formed by the light spatially modulated by the light modulation unit 12 passes through the opening 15a of the housing 15 and is incident on the optical unit 106, and is projected onto the object 6 to be projected as a projection target, so that the image G1 becomes visible to the observer.

[0041] As shown in FIG. 4, the optical unit 106 includes a first member 102 having a hollow portion 2A connected to the inside of the main body portion 101, a second member 103 having a hollow portion 3A connected to the hollow portion 2A, a first optical system 121 and a reflecting member 122 disposed in the hollow portion 2A, a second optical system 31, a reflecting member 32, a third optical system 33, and a lens 34 disposed in the hollow portion 3A, a shift mechanism 105, and a projection direction changing mechanism 104.

[0042] The first member 102 is a member having a rectangular cross-sectional outer shape as an example, and the openings 2a and 2b are formed in planes perpendicular to each other. The first member 102 is supported by the main body portion 101 in a state where the opening 2a is disposed at a position facing the opening 15a of the main body portion 101. The light emitted from the light modulation portion 22 of the light modulation unit 12 of the main body portion 101 is incident on the hollow portion 2A of the first member 102 through the openings 15a and 2a.

[0043] The incident direction of the light incident from the main body portion 101 into the hollow portion 2A is described as the direction X1, the reverse direction of the direction X1 is described as the direction X2, and the directions X1 and X2 are collectively referred to as the direction X. Also, in FIG. 4, the direction from the front to the back of the paper surface and its reverse direction are described as the direction Z. Among the directions Z, the direction from the front to the back of the paper surface is described as the direction Z1, and the direction from the back to the front of the paper surface is described as the direction Z2.

[0044] Also, the direction perpendicular to the directions X and Z is described as the direction Y. Among the directions Y, the upward direction in FIG. 4 is described as the direction Y1, and the downward direction in FIG. 4 is described as the direction Y2. In the example of FIG. 4, the projection device 10 is arranged such that the direction Y2 is the vertical direction.

[0045] The projection optical system 23 shown in FIG. 2 is composed of a first optical system 121, a reflecting member 122, a second optical system 31, a reflecting member 32, a third optical system 33, and a lens 34. FIG. 4 shows the optical axis K of this projection optical system 23. The first optical system 121, the reflecting member 122, the second optical system 31, the reflecting member 32, the third optical system 33, and the lens 34 are arranged along the optical axis K in this order from the light modulation unit 22 side.

[0046] The first optical system 121 includes at least one lens and guides the light traveling in the direction X1 incident from the main body 101 to the first member 102 to the reflecting member 122.

[0047] The reflecting member 122 reflects the light incident from the first optical system 121 in the direction Y1. The reflecting member 122 is constituted by, for example, a mirror or the like. An aperture 2b is formed on the optical path of the light reflected by the reflecting member 122 in the first member 102, and the reflected light passes through the aperture 2b and proceeds to the hollow portion 3A of the second member 103.

[0048] The second member 103 is a member having a substantially T-shaped cross-sectional outer shape, and an aperture 3a is formed at a position facing the aperture 2b of the first member 102. The light from the main body 101 that has passed through the aperture 2b of the first member 102 enters the hollow portion 3A of the second member 103 through this aperture 3a. Note that the cross-sectional outer shapes of the first member 102 and the second member 103 are arbitrary and are not limited to the above.

[0049] The second optical system 31 includes at least one lens and guides the light incident from the first member 102 to the reflecting member 32.

[0050] The reflecting member 32 reflects the light incident from the second optical system 31 in the direction X2 and guides it to the third optical system 33. The reflecting member 32 is constituted by, for example, a mirror or the like.

[0051] The third optical system 33 includes at least one lens and guides the light reflected by the reflecting member 32 to the lens 34.

[0052] The lens 34 is disposed at the end portion of the second member 103 on the X2 side of the direction so as to close the opening 3c formed at the end portion. The lens 34 projects the light incident from the third optical system 33 onto the projection target 6.

[0053] The projection direction changing mechanism 104 is a rotation mechanism that rotatably connects the second member 103 to the first member 102. By this projection direction changing mechanism 104, the second member 103 is configured to be rotatable about a rotation axis (specifically, the optical axis K) extending in the direction Y. Note that the projection direction changing mechanism 104 only needs to be able to rotate the optical system and is not limited to the arrangement position shown in FIG. 4. Also, the number of rotation mechanisms is not limited to one, and a plurality of rotation mechanisms may be provided.

[0054] The shift mechanism 105 is a mechanism for moving the optical axis K of the projection optical system (in other words, the optical unit 106) in a direction perpendicular to the optical axis K (direction Y in FIG. 4). Specifically, the shift mechanism 105 is configured to be able to change the position of the first member 102 in the direction Y with respect to the main body portion 101 of the first member 102. The shift mechanism 105 may move the first member 102 manually or may move the first member 102 electrically.

[0055] FIG. 4 shows a state in which the first member 102 is moved to the maximum extent to the Y1 side by the shift mechanism 105. By moving the first member 102 in the Y2 direction by the shift mechanism 105 from the state shown in FIG. 4, the relative position between the center of the image formed by the light modulation unit 22 (in other words, the center of the display surface) and the optical axis K changes, and the image G1 projected onto the projection target 6 can be shifted (translated) in the Y2 direction.

[0056] Note that the shift mechanism 105 may be a mechanism for moving the light modulation unit 22 in the direction Y instead of moving the optical unit 106 in the direction Y. Even in this case, the image G1 projected onto the projection target 6 can be moved in the Y2 direction.

[0057] <Projection control performed by the control device 4> Figs. 5 to 8 are diagrams showing a specific example 1 of the projection control performed by the control device 4. In this example, the control device 4 will explain the control for shifting the projection area 11, that is, the control for changing the position of the projection area 11.

[0058] The operator 51 is the person who sets the projection by the projection device 10. The operator 51 holds the indicator 52 and can use the indicator 52 to indicate each part of the object 6 to be projected.

[0059] The indicator 52 has a sensor capable of detecting the movement of the indicator 52 itself. The detection of this movement includes the detection of the direction of movement and the detection of the amount of movement. This sensor includes, for example, an acceleration sensor capable of measuring three-dimensional acceleration and is provided, for example, at the tip of the indicator 52.

[0060] Also, the indicator 52 can perform an instruction operation for instructing the control device 4 with the position pointed by the indicator 52 as an input value. For example, a sensor (touch sensor) for detecting contact with the object 6 to be projected is provided at the tip of the indicator 52, and the instruction operation is an operation of bringing the tip of the indicator 52 into contact with the object 6 to be projected.

[0061] Also, the indicator 52 directly or indirectly transmits information such as the detection result of movement and the reception result of the instruction operation to the control device 4. For example, the indicator 52 can communicate with the operation reception unit 2 of the control device 4 by wireless communication such as short-range wireless communication, and transmits information to the control device 4 by wireless communication with the operation reception unit 2.

[0062] For example, the indicator 52 performs the detection of movement at a fixed cycle and transmits the detection result to the control device 4, and also transmits the reception result of the instruction operation to the control device 4 at the time when the instruction operation is received.

[0063] Alternatively, the indicator 52 may detect movement at regular intervals, accumulate the detection results, and when a pointing operation is received, transmit the accumulated movement detection results together with the reception result of the pointing operation to the control device 4 all at once. At this time, the indicator 52 may transmit all of the accumulated movement detection results to the control device 4, or may transmit the result of integrating the accumulated movement detection results to the control device 4.

[0064] First, the control device 4 acquires information capable of specifying the size of the projection area 11 based on the first operation from the operator 51. The first operation is an operation in which the indicator 52 indicates a first position and a second position included in the projection area 11. The first position and the second position are, for example, different positions predetermined within the projection area 11. As an example, as shown in FIG. 5, the first position is the lower right end 11a of the projection area 11, and the second position is the lower left end 11b of the projection area 11.

[0065] For example, as the first operation, the operator 51 first indicates the end 11a as shown in FIG. 5 (for example, touches the end 11a with the tip of the indicator 52), and then indicates the end 11b as shown in FIG. 6 (for example, touches the end 11a with the tip of the indicator 52).

[0066] The control device 4 acquires information capable of specifying the size of the projection area 11 based on the detection result of the movement of the indicator 52 during the period from when the end 11a is indicated until the end 11b is indicated, that is, during the period from the first pointing operation to the second pointing operation.

[0067] For example, the control device 4 receives the detection result of the movement of the indicator 52 during the period from when the end 11a is indicated until the end 11b is indicated from the indicator 52, and by integrating the received detection results, the distance between the ends 11a and 11b, that is, the width of the projection area 11 can be derived.

[0068] Also, since the aspect ratio of the projection area 11 is known in the control device 4, the control device 4 can also derive the height of the projection area 11 based on the derived width of the projection area 11 and the aspect ratio of the projection area 11. Thereby, the control device 4 can acquire information (the width and height of the projection area 11) that can specify the size of the projection area 11.

[0069] Then, in a state where the control device 4 has detected a second operation from the operator 51 with respect to the projection area 11, based on the acquired information (the width and height of the projection area 11) and the detected second operation, the control device 4 performs control of the projection by the projection device 10 (shift of the projection area 11). Specifically, the control device 4 specifies the relationship between the size of the image used by the projection device 10 for projection and the size of the projection area 11 based on the acquired information, and performs control of the projection by the projection device 10 based on the specified relationship and the second operation.

[0070] The second operation is, for example, an operation of instructing a third position included in the projection area 11 with the indicator 52 in a state where the end portion 11b (second position) is indicated by the indicator 52. The third position is an arbitrary position within the projection area 11, and is, for example, the destination of movement of the end portion 11b of the projection area 11. For example, after the operator 51 indicates the end portion 11b in the above-described first operation (for example, touches the end portion 11a with the tip of the indicator 52), the operator 51 indicates an arbitrary position 6a within the projection area 11 as shown in FIG. 7 (for example, touches the arbitrary position 6a with the tip of the indicator 52).

[0071] The size of the image used by the projection device 10 for projection may be the number of pixels of the image, or may be the size of the image in the light modulation unit 22 (the size of the liquid crystal panel of the light modulation unit 22). For example, the relationship between the size of the image used by the projection device 10 for projection and the size of the projection area 11 is the ratio of the width of the image used by the projection device 10 for projection to the width of the projection area 11.

[0072] For example, during the period from when the end portion 11b (second position) is instructed until an arbitrary position 6a (third position) is instructed, that is, during the period from the second instruction operation to the third instruction operation, the control device 4 derives the direction and distance of the arbitrary position 6a with respect to the current end portion 11b by integrating the detection results of the movement of the indicator 52. Further, the control device 4 converts the derived distance into a distance in the optical modulation unit 22 based on the ratio between the width of the image used by the projection device 10 for projection and the width of the projection area 11.

[0073] Then, the control device 4 electronically shifts the projection area 11 based on the conversion result. Specifically, the control device 4 moves the area that transmits light in the optical modulation unit 22 in the derived direction by the converted distance. As a result, as shown in FIG. 8, the projection area 11 can be shifted so that the end portion 11b of the projection area 11 coincides with the arbitrary position 6a.

[0074] <Specific Example of Calculation of Shift Amount by Control Device 4> FIG. 9 is a diagram showing a specific example of the calculation of the shift amount by the control device 4. The projection image 71 shown in FIG. 9 is the image used by the projection unit 1 for projection. Let the width of the projection image 71 be x. x may be the number of horizontal pixels of the projection image 71, or may be the horizontal length of the projection image 71 in the optical modulation unit 22. Also, let the distance between the end portions 11a and 11b obtained by the first operation shown in FIGS. 5 and 6 be X0. Also, let the distance between the end portion 11b and the arbitrary position 6a obtained by the second operation shown in FIG. 7 be X1.

[0075] For example, the control device 4 calculates the ratio x / X0 based on the distance X0 between the end portions 11a and 11b and the width x of the projection image 71. Further, the control device 4 can calculate the shift amount of the area that transmits light in the optical modulation unit 22 by multiplying the calculated ratio x / X0 by the distance X1 between the end portion 11b and the arbitrary position 6a.

[0076] <Guidance Information for the First Operation and the Second Operation> FIG. 10 is a diagram showing an example of guidance information for the first operation and the second operation. In the example shown in FIGS. 5 to 8, the control device 4 may perform control to project guidance information as shown in FIG. 10 from the projection unit 1.

[0077] First, the control device 4 projects an image including the guidance information 91 from the projection unit 1 as in step S91. The guidance information 91 is an image that indicates the end portion 11a which is the lower right corner of the projection area 11 and prompts the instruction of the end portion 11a.

[0078] When the operator 51 instructs (for example, touches) the end portion 11a with the indicator 52, the control device 4 projects an image including the guidance information 92 from the projection unit 1 as in step S92. The guidance information 92 is an image that indicates the end portion 11b which is the lower left corner of the projection area 11 and prompts the instruction of the end portion 11b.

[0079] When the operator 51 instructs (for example, touches) the end portion 11b with the indicator 52, the control device 4 projects an image including the guidance information 93 from the projection unit 1 as in step S93. The guidance information 93 is an image that prompts the instruction of the shift destination of the projection area 11.

[0080] In this way, each of the end portion 11a (the first position) and the end portion 11b (the second position) may be a position indicated by a projection image projected by the projection device 10 onto the projection area 11. Thereby, even if the operator 51 does not remember the position to be instructed in the first operation, the operator 51 can perform the first operation of instructing the end portion 11a (the first position) and the end portion 11b (the second position).

[0081] Also, by the projection device 10 projecting an image showing the method of the first operation onto the projection area 11, the operator 51 can perform the first operation even if the operator 51 does not remember the method of the first operation. Further, after the first operation is performed, by the projection device 10 projecting an image showing the method of the second operation onto the projection area 11, the operator 51 can perform the second operation even if the operator 51 does not remember the method of the second operation.

[0082] In the examples shown in FIGS. 5 to 8, the case where the projection area 11 is shifted in the horizontal direction has been described. However, the control device 4 may shift the projection area 11 in the vertical direction or in an oblique direction in response to a second operation by the operator 51. For example, in the example shown in FIG. 7, when the operator 51 indicates the position at the lower left of the end portion 11b as the second operation, the control device 4 performs control to shift the projection area 11 to the lower left.

[0083] Also, in the examples shown in FIGS. 5 to 8, the case where the projection area 11 is shifted so that the end portion 11b of the projection area 11 coincides with the arbitrary position 6a has been described. However, the control device 4 may shift the projection area 11 so that the end portion 11a of the projection area 11 coincides with the arbitrary position 6a. Further, the control device 4 may shift the projection area 11 so that the upper left corner or the upper right corner of the projection area 11 coincides with the arbitrary position 6a.

[0084] <Specific Example 2 of Projection Control Performed by Control Device 4> FIG. 11 is a diagram showing a specific example 2 of the projection control performed by the control device 4. In this example, the control device 4 will explain the control for changing the size of the projection area 11.

[0085] The first operation and the second operation are the same as those in the examples shown in FIGS. 5 to 7. As shown in FIG. 7, when the operator 51 indicates the arbitrary position 6a, the control device 4 may expand or contract the projection area 11 so that the end portion 11b coincides with the arbitrary position 6a, as shown in FIG. 11.

[0086] In the example shown in FIG. 11, since the arbitrary position 6a is located on the opposite side (left side) of the end portion 11a with respect to the end portion 11b, the control device 4 expands the projection area 11 to the left. Note that when the arbitrary position 6a is located on the side of the end portion 11a with respect to the end portion 11b, the control device 4 contracts the projection area 11.

[0087] In the example shown in FIG. 11, the case where the projection area 11 is enlarged or reduced in the horizontal direction has been described. However, the control device 4 may enlarge or reduce the projection area 11 in the vertical direction or enlarge or reduce the projection area 11 in an oblique direction according to a second operation by the operator 51. For example, in the example shown in FIG. 7, when the operator 51 indicates the position at the lower left of the end portion 11b as the second operation, the control device 4 performs control to enlarge the projection area 11 so as to extend it to the lower left.

[0088] Also, in the example shown in FIG. 11, the case where the projection area 11 is enlarged or reduced so that the end portion 11b of the projection area 11 coincides with the arbitrary position 6a has been described. However, the control device 4 may enlarge or reduce the projection area 11 so that the end portion 11a of the projection area 11 coincides with the arbitrary position 6a. Further, the control device 4 may enlarge or reduce the projection area 11 so that the upper left corner or the upper right corner of the projection area 11 coincides with the arbitrary position 6a.

[0089] <Specific Example 3 of Projection Control Performed by Control Device 4> FIG. 12 is a diagram showing a specific example 3 of projection control performed by the control device 4. In this example, the control device 4 will explain the control for correcting the distortion of the projection area 11.

[0090] The first operation and the second operation are the same as those in the examples shown in FIGS. 5 to 7. As shown in FIG. 7, when the operator 51 indicates the arbitrary position 6a, the control device 4 may perform distortion correction of the projection area 11 so that the end portion 11b coincides with the arbitrary position 6a as shown in FIG. 12. Specifically, the control device 4 performs image processing to distort the image in the light modulation unit 22 so that the lower left corner is at a position corresponding to the end portion 11b.

[0091] For example, although the projection image 71 is rectangular, the projection unit 1 is facing in an oblique direction with respect to the projection object 6, and the projection area 11 on the projection object 6 is trapezoidal. The operator 51 can perform the second operation so as to move the corner (for example, the end portion 11b or the end portion 11a) of the projection area 11 so that the projection area 11 approaches a rectangle. Then, the control device 4 performs trapezoid correction, and the projection area 11 can be made to approach a rectangle.

[0092] In the example shown in FIG. 12, the case where distortion correction is performed so that the end portion 11b of the projection area 11 moves in the horizontal direction has been described. However, the control device 4 may perform distortion correction so that the end portion 11b of the projection area 11 moves in the vertical direction or perform distortion correction so that the end portion 11b of the projection area 11 moves in an oblique direction in response to a second operation by the operator 51. For example, in the example shown in FIG. 7, when the operator 51 instructs the lower left position of the end portion 11b as the second operation, the control device 4 performs distortion correction so that the end portion 11b of the projection area 11 moves to the lower left.

[0093] Also, in the example shown in FIG. 11, the case where distortion correction is performed so that the end portion 11b of the projection area 11 coincides with the arbitrary position 6a has been described. However, the control device 4 may perform distortion correction so that the end portion 11a of the projection area 11 coincides with the arbitrary position 6a. Further, the control device 4 may perform distortion correction so that the upper left corner or the upper right corner of the projection area 11 coincides with the arbitrary position 6a.

[0094] <Specific Example 4 of Projection Control Performed by Control Device 4> FIGS. 13 and 14 are diagrams showing a specific example 4 of projection control performed by the control device 4. In this example, the control device 4 will explain the control for changing the content of the image in the projection area 11.

[0095] The first operation is the same as the example shown in FIGS. 5 and 6. As shown in FIG. 3, it is assumed that an image including the content 131 is projected onto the projection area 11. The content 131 is the character string "AA" in the example shown in FIG. 13.

[0096] For example, as a second operation after the first operation, the operator 51 first instructs (for example, touches) the position a near the content 131 with the indicator 52 as shown in FIG. 13, and then instructs (for example, touches) the position b upper right of the position a with the indicator 52 as shown in FIG. 14.

[0097] For the above-described second operation, as shown in FIG. 14, the control device 4 changes the image projected from the projection unit 1 so that the content 131 expands upward and to the right. For example, the control device 4 derives the direction and distance of position b with respect to the current position a by integrating the detection results of the movement of the indicator 52 during the period from when position a is indicated to when position b is indicated, that is, during the period from the third instruction operation to the fourth instruction operation. Further, the control device 4 converts the derived distance into a distance in the light modulation unit 22 based on the ratio between the image used by the projection device 10 for projection and the projection area 11 (for example, the above ratio x / X0).

[0098] Then, the control device 4 changes the content of the content 131 based on the conversion result. Specifically, the control device 4 performs a process of expanding the content 131 so that the upper right part of the content 131 extends to position b. As a result, as shown in FIG. 14, the content 131 can be expanded upward and to the right so that the end 11b of the projection area 11 coincides with the arbitrary position 6a.

[0099] Also, as the second operation, the operator 51 may first indicate (for example, touch) position a with the indicator 52, move the indicator 52 to position b while keeping the indicator 52 in contact with the object 6 to be projected, and then separate the indicator 52 from the object 6 to be projected. Also in this case, as shown in FIG. 14, the control device 4 performs a process of expanding the content 131 so that the upper right part of the content 131 extends to position b.

[0100] Regarding the control for changing the content of the image in the projection area 11, the expansion of the content 131 has been described, but the control for changing the content of the image in the projection area 11 is not limited to this. For example, the control device 4 may reduce the content 131, move it within the projection area 11, or perform a process of distorting the content 131 in response to the second operation by the operator 51.

[0101] <Options information that the control device 4 projects onto the projection unit 1> FIG. 15 and FIG. 16 are diagrams showing an example of the option information projected by the control device 4 onto the projection unit 1. For example, when receiving the first operation shown in FIGS. 5 and 6, the control device 4 may project, as shown in FIG. 15, an option image 150 showing options for a plurality of types of controls from the projection unit 1.

[0102] In the example shown in FIG. 15, the option image 150 shows "Shift", "Zoom", and "Distortion Correction" as control options. "Shift" is a control for shifting the projection area 11 shown in FIG. 8. "Zoom" is a control for enlarging or reducing the projection area 11 shown in FIG. 11. "Distortion Correction" is a control for correcting the distortion of the projection area 11 shown in FIG. 12.

[0103] An operation of instructing any of the options shown by the option image 150 is defined as the third operation. For example, the third operation is an operation of instructing (e.g., touching) any of the options shown by the option image 150 with the indicator 52. After performing the first operation of, for example, instructing the end 11a and then instructing the end 11b, the operator 51 performs the third operation of instructing any of the options shown by the option image 150 with the indicator 52.

[0104] In response to this third operation, the control device 4 accumulates the detection results of the movement of the indicator 52 during the period from when the end 11b is instructed until any option of the option image 150 is instructed, that is, during the period from the second instruction operation to the third instruction operation, to derive the direction and distance of the option of the option image 150 with respect to the current end 11b. Further, the control device 4 converts the derived distance into a distance in the optical modulation unit 22 based on the ratio between the image used by the projection device 10 for projection and the projection area 11 (e.g., the ratio x / X0 described above). Then, the control device 4 identifies the option instructed by the third operation among the option image 150 based on the conversion result and the derived direction.

[0105] After the third operation, the operator 51 performs the second operation described above. For example, as shown in FIG. 16, after the operator 51 instructs "shift" as the third operation, the operator 51 performs the second operation of instructing the arbitrary position 6a as shown in FIG. 7. In contrast, the control device 4 identifies "shift" as the option instructed by the third operation, and performs control to shift the projection area 11 as shown in FIG. 8 according to the second operation.

[0106] For example, the control device 4 integrates the detection results of the movement of the indicator 52 during the period from when "shift" of the option image 150 is instructed until the arbitrary position 6a (third position) is instructed, that is, during the period from the third instruction operation to the fourth instruction operation, thereby deriving the direction and distance of the arbitrary position 6a with respect to the "shift" of the current option image 150. Further, the control device 4 converts the derived distance into a distance in the light modulation unit 22 according to the ratio between the width of the image used for projection by the projection device 10 and the width of the projection area 11. Then, the control device 4 electronically shifts the projection area 11 based on the conversion result.

[0107] Alternatively, after the operator 51 instructs "enlarge / reduce" by the third operation, the operator 51 may perform the second operation of instructing the arbitrary position 6a as shown in FIG. 7. In contrast, the control device 4 identifies "enlarge / reduce" as the option instructed by the third operation, and performs control to enlarge the projection area 11 as shown in FIG. 11 according to the second operation.

[0108] Alternatively, after the operator 51 instructs "distortion correction" by the third operation, the operator 51 may perform the second operation of instructing the arbitrary position 6a as shown in FIG. 7. In contrast, the control device 4 identifies "distortion correction" as the option instructed by the third operation, and performs distortion correction of the projection area 11 as shown in FIG. 12 according to the second operation.

[0109] In FIG. 15, the case where the option image 150 shows "Shift", "Zoom In / Out", and "Distortion Correction" as options has been described. However, the options shown by the option image 150 are not limited to this. For example, the option image 150 may include control to change the content of the image as shown in FIGS. 13 and 14 as an option.

[0110] Also, in the example of FIG. 15, the option image 150 is projected outside the projection area 11 within the projectable range that can be projected by the projection unit 1. However, the control device 4 may project the option image 150 in the projection area 11. Further, when receiving the third operation, the control device 4 may end the projection of the option image 150, that is, set the option image 150 to non-projection.

[0111] <Projection control based on multiple second operations> FIGS. 17 and 18 are diagrams showing an example of projection control based on multiple second operations. For example, after the operator 51 performs the first operation, as shown in FIGS. 15 and 16, the operator instructs "Shift" of the option image 150 as the third operation, and then, as the second operation, after instructing an arbitrary position 6a as shown in FIG. 7, an arbitrary position 6b within the projection area 11 is instructed as shown in FIG. 17.

[0112] The control device 4 sets the option image 150 to non-projection in response to the third operation, and repeatedly performs projection control in response to multiple second operations. That is, the control device 4 first shifts the projection area 11 as shown in FIG. 8 when the arbitrary position 6a is instructed, and then shifts the projection area 11 again as shown in FIG. 18 when the arbitrary position 6b is instructed.

[0113] In this way, after the third operation, when the control device 4 detects multiple second operations, the control device 4 performs multiple types of control corresponding to the third operation. As a result, when performing the second operation multiple times, it is not necessary to perform the third operation each time, so that the projection control by the second operation can be easily performed.

[0114] <Reprojection image for reprojecting the option image 150> FIG. 19 is a diagram showing an example of a reprojection image for reprojection of the option image 150. After detecting the third operation (instruction of an option of the option image 150) shown in FIG. 16, the control device 4 may project the reprojection image 190 shown in FIG. 19 when the option image 150 is not projected. The reprojection image 190 is, for example, an image smaller than the option image 150 and is an image that is less likely to interfere with the second operation.

[0115] As described with reference to FIGS. 17 and 18, when detecting the third operation, the control device 4 makes the option image 150 non-projected, and then repeatedly performs projection control by detecting subsequent instruction operations as the second operation. However, when detecting an instruction operation for instructing the reprojection image 190, the control device 4 projects the option image 150 again and detects the next instruction operation as the third operation.

[0116] In this way, after detecting the third operation, the control device 4 may make the option image 150 non-projected and project a reprojection image 190 for reprojection of the option image 150. Thereby, after the operator 51 selects the type of projection control by the third operation, the operator 51 can repeatedly execute the same type of projection control by performing the second operation a plurality of times, and can also change the type of projection control by instructing the reprojection image 190.

[0117] <Processing by the control device 4> FIG. 20 is a flowchart showing an example of the processing by the control device 4. The control device 4 executes the processing shown in FIG. 20, for example.

[0118] First, the control device 4 determines whether or not it has detected the first instruction operation (for example, touching of the object to be projected 6 by the indicator 52) (step S201), and waits until the first instruction operation is detected (loop of step S201: No). When detecting the first instruction operation (step S201: Yes), the control device 4 starts accumulating the detection results of the movement of the indicator 52 (step S202).

[0119] Next, the control device 4 determines whether or not a second instruction operation has been detected (step S203), and waits until a second instruction operation is detected (loop for step S203: No). When a second instruction operation is detected (step S203: Yes), the control device 4 calculates the ratio x / X0 described above based on the accumulation result of the detection results started in step S202 (step S204). Thereafter, the control device 4 determines the instruction position by the indicator 52 in the projection area 11 (projection image) based on at least one of the first position and the second position in the projection area 11 (projection image), the ratio x / X0, and the detection result of the movement by the indicator 52. Next, the control device 4 performs control to project the option image 150 shown in FIG. 15 from the projection unit 1 (step S205).

[0120] Next, the control device 4 determines whether or not a new instruction operation has been detected (step S206), and waits until a new instruction operation is detected (loop for step S206: No). When a new instruction operation is detected (step S206: Yes), the control device 4 performs control to cancel the projection of the option image 150 projected from the projection unit 1 in step S205 and project a re-projection image 190 from the projection unit 1 (step S207). Further, the control device 4 specifies the option indicated by the new instruction operation detected in step S206 (step S208).

[0121] Next, the control device 4 determines whether or not a new instruction operation has been detected (step S209), and waits until a new instruction operation is detected (loop for step S209: No). When a new instruction operation is detected (step S209: Yes), the control device 4 determines whether or not the re-projection image 190 has been indicated by the detected new instruction operation (step S210).

[0122] In step S210, when the re-projected image 190 is not indicated (step S210: No), the control device 4 recognizes the indicated operation detected in step S209 as the second operation. That is, the control device 4 executes the control of the option specified in step S208 according to the indicated operation detected in step S209 (step S211), and returns to step S209.

[0123] In step S210, when the re-projected image 190 is indicated (step S210: Yes), the control device 4 returns to step S205, controls the projection unit 1 to project the option image 150 again, and accepts the selection of the type of projection control again.

[0124] As described above, according to the control device 4 of the embodiment, based on the first operation from the operator 51, information capable of specifying the size of the projection area 11 is acquired, and in a state where the second operation from the operator 51 on the projection area 11 is detected, the projection of the projection device 10 can be controlled based on the acquired information and the second operation.

[0125] Thereby, since the relationship between the size of the image used for projection by the projection device 10 and the size of the projection area 11 can be specified, for example, even if the second operation from the operator 51 on the projection area 11 is not imaged by the imaging device, the indicated position by the second operation in the projection image can be discriminated. Therefore, even without using the imaging device, the projection of the projection device 10 can be controlled by the second operation from the operator 51 on the projection area 11. For this reason, the operation of projection control can be facilitated with a simple configuration.

[0126] <Modification Example 1> FIG. 21 is a diagram showing an example of a configuration in which the control device of the embodiment is applied to a device other than the projection device 10. Although the configuration in which the control device (for example, the control device 4) of the embodiment is provided in the projection device 10 has been described, the control device of the embodiment may be another device that can communicate with the projection device 10 directly or indirectly. For example, the control device of the embodiment may be a personal computer 2101 that can communicate with the projection device 10 and the indicator 52.

[0127] In this case, the personal computer 2101 executes each of the above-described projection controls by communicating with the projection device 10 and the indicator 52. For example, the personal computer 2101 is connected to the projection device 10 by a communication cable 2102 and controls the projection device 10 via the communication cable 2102. Note that the personal computer 2101 may control the projection device 10 by performing wireless communication with the projection device 10.

[0128] Further, a receiver 2103 is connected to the personal computer 2101, and the personal computer 2101 receives each piece of information from the indicator 52 via the receiver 2103. Note that the receiver 2103 may be built in the personal computer 2101.

[0129] In the configuration shown in FIG. 21, similar to the control device 4 described above, the personal computer 2101 acquires information that can specify the size of the projection area 11 based on the first operation from the operator 51, and in a state where the second operation from the operator 51 with respect to the projection area 11 is detected, controls the projection by the projection device 10 based on the acquired information and the second operation.

[0130] <Modification Example 2> As an instruction operation for instructing the control device 4 with the position pointed by the indicator 52 as an input value, an operation of bringing the tip of the indicator 52 into contact (touching) with the object to be projected 6 has been described, but the instruction operation is not limited to this. For example, the indicator 52 is provided with a button that can be pressed by the operator 51, and the instruction operation may be the pressing of this button. Alternatively, the indicator 52 is provided with a touch sensor that can be touched by the fingertip or the like of the operator 51, and the instruction operation may be the touch by the fingertip or the like of this touch sensor.

[0131] <Modified Example 3> As a first operation for acquiring information capable of specifying the size of the projection area 11, an operation of instructing the first position and the second position included in the projection area 11 by the indicator 52 has been described, but the first operation is not limited to this. For example, the first operation may be an operation of inputting information (as an example, a numerical value indicating the distance between the ends 11a and 11b) capable of specifying the size of the projection area 11 to the control device 4 by key input or the like.

[0132] At least the following matters are described in this specification.

[0133] (1) Based on a first operation from an operator, acquire information capable of specifying the size of a projection area by a projection device, In a state where a second operation from the operator with respect to the projection area is detected, perform control of projection by the projection device based on the acquired information and the second operation. A control device including a processor.

[0134] (2) The control device according to (1), The processor specifies the relationship between the size of the image used for projection by the projection device and the size of the projection area based on the information, and performs the control based on the specified relationship and the second operation. Control device.

[0135] (3) The control device according to any one of (1) to (2), The first operation includes an operation of instructing a first position and a second position included in the projection area by an indicator having a sensor capable of detecting movement, The processor performs control to acquire the information based on a detection result by the sensor of the movement of the indicator from when the first position is instructed until the second position is instructed, Control device.

[0136] (4) The control device according to (3), The second operation includes an operation of instructing a third position included in the projection area by the indicator in a state where the second position is instructed by the indicator, The processor performs the control based on at least a detection result by the sensor of the movement of the indicator from when the second position is instructed until the third position is instructed and the information, Control device.

[0137] (5) The control device according to (3) or (4), Each of the first position and the second position is an end of the projection area, Control device.

[0138] (6) The control device according to (3) or (4), Each of the first position and the second position is a position indicated by a projection image projected by the projection device onto the projection area, Control device.

[0139] (7) The control device according to any one of (1) to (6), The control includes control for changing the position of the projection area, Control device.

[0140] (8) The control device according to any one of (1) to (7), wherein the control includes control for changing the size of the projection area, Control device.

[0141] (9) The control device according to any one of (1) to (8), wherein the control includes control for correcting the distortion of the projection area, Control device.

[0142] (10) The control device according to any one of (1) to (9), wherein the control includes control for changing the content of the image in the projection area, Control device.

[0143] (11) The control device according to any one of (1) to (10), wherein the processor causes the projection device to project a selection image indicating options of the type of the control, and in a state where the second operation is detected after a third operation for instructing the selection image, performs the control of the type corresponding to the third operation based on the second operation, Control device.

[0144] (12) The control device according to (11), wherein the processor performs the control of the type corresponding to the third operation a plurality of times in a state where the second operation is detected a plurality of times after the third operation, Control device.

[0145] (13) The control device according to (11) or (12), wherein the processor performs control to make the selection image non - projected and project a re - projection image for re - projecting the selection image after detecting the third operation, Control device.

[0146] (14) A processor of a control device that controls projection by a projection device acquires information capable of specifying the size of a projection area by the projection device based on a first operation from an operator, and controls projection by the projection device based on the acquired information and the second operation in a state where a second operation from the operator on the projection area is detected. Control method.

[0147] (15) The control method according to (14), wherein the processor specifies the relationship between the size of an image used for projection by the projection device and the size of the projection area based on the information, and performs the control based on the specified relationship and the second operation. Control method.

[0148] (16) The control method according to any one of (14) to (15), wherein the first operation includes an operation of indicating a first position and a second position included in the projection area by an indicator having a sensor capable of detecting movement, and the processor performs control to acquire the information based on a detection result by the sensor of the movement of the indicator from when the first position is indicated until the second position is indicated. Control method.

[0149] (17) The control method according to (16), wherein the second operation includes an operation of indicating a third position included in the projection area by the indicator in a state where the second position is indicated by the indicator, and the processor performs the control based on at least a detection result by the sensor of the movement of the indicator from when the second position is indicated until the third position is indicated and the information. Control method.

[0150] (18) The control method according to (16) or (17), Each of the first position and the second position is an end of the projection area. Control method.

[0151] (19) The control method according to (16) or (17), wherein each of the first position and the second position is a position indicated by a projection image projected by the projection device onto the projection area. Control method.

[0152] (20) The control method according to any one of (14) to (19), wherein the control includes control for changing the position of the projection area. Control method.

[0153] (21) The control method according to any one of (14) to (20), wherein the control includes control for changing the size of the projection area. Control method.

[0154] (22) The control method according to any one of (14) to (21), wherein the control includes control for correcting the distortion of the projection area. Control method.

[0155] (23) The control method according to any one of (14) to (22), wherein the control includes control for changing the content of the image in the projection area. Control method.

[0156] (24) The control method according to any one of (14) to (23), wherein The above processor causes the projection device to project a selection image indicating options of the above control type, and in a state where the second operation is detected after the third operation for instructing the selection image, performs the above control of the type corresponding to the third operation based on the second operation. Control method.

[0157] (25) The control method according to (24), wherein the above processor performs the above control of the type corresponding to the third operation a plurality of times in a state where the second operation is detected a plurality of times after the third operation. Control method.

[0158] (26) The control method according to (24) or (25), wherein the above processor, after detecting the third operation, performs control to stop projecting the selection image and project a re-projection image for re-projecting the selection image. Control method.

[0159] (27) For a processor of a control device that controls projection by a projection device, acquire information capable of specifying the size of a projection area by the projection device based on a first operation from an operator, and in a state where a second operation from the operator on the projection area is detected, perform control of projection by the projection device based on the acquired information and the second operation. A control program for causing execution of processing.

[0160] (28) A projection device, a control device including a processor that acquires information capable of specifying the size of a projection area by the projection device based on a first operation from an operator, and in a state where a second operation from the operator on the projection area is detected, performs control of projection by the projection device based on the acquired information and the second operation, and a projection system including the same.

[0161] Although various embodiments have been described above with reference to the drawings, it goes without saying that the present invention is not limited to such examples. It is obvious that those skilled in the art can conceive of various modification examples or correction examples within the scope described in the claims, and it is naturally understood that they also belong to the technical scope of the present invention. Also, within the scope not departing from the gist of the invention, the constituent elements in the above embodiments may be arbitrarily combined.

[0162] This application is based on a Japanese patent application (Japanese Patent Application No. 2020-144980) filed on August 28, 2020, the content of which is incorporated herein by reference.

Explanation of Reference Signs

[0163] 1 Projection unit 2 Operation reception unit 2A, 3A Hollow part 2a, 2b, 3a, 3c, 15a Opening 4 Control device 4a Storage medium 6 Object to be projected 6a, 6b Arbitrary positions 10 Projection device 11 Projection area 11a, 11b Ends 12 Light modulation unit 15 Housing 21 Light source 22 Light modulation part 23 Projection optical system 24 Control circuit 31 Second optical system 32, 122 Reflective member 33 Third optical system 34 Lens 51 Operator 52 Indicator 71 Projection image 91~93 Guidance information 101 Main body part 102 First member 103 Second member 104 Projection direction change mechanism 105 Shift mechanism 106 Optical unit 121 First optical system 131 Content 150 Option image 190 Reprojected image 2101 Personal computer 2102 Communication cable 2103 Receiver G1 Image

Claims

1. Based on a first operation from an operator, obtain information capable of specifying the size of a projection area irradiated with projection light by a projection device, In a state where a second operation from the operator on the projection area is detected, perform control of projection by the projection device based on the obtained information and the second operation, A control device including a processor, The first operation includes an operation of indicating a first position and a second position, which are arbitrary positions on the outer periphery of the projection area at the time of reception of the first operation, by an indicator having a sensor capable of detecting movement, The second operation includes an operation of indicating a third position included in the projection area by the indicator in a state where the second position is indicated by the indicator, The processor specifies the relationship between the size of the number of pixels of a projection image used for projection by the projection device and the size of the projection area based on the information, and performs the control based on the specified relationship and the second operation, Control device.

2. The control device according to Claim 1, The processor performs control of obtaining the information based on a detection result by the sensor of the movement of the indicator from when the first position is indicated until the second position is indicated, Control device.

3. The control device according to Claim 2, The processor performs the control based on at least the detection result by the sensor of the movement of the indicator from when the second position is indicated until the third position is indicated and the information, Control device.

4. The control device according to Claim 2 or 3, Each of the first position and the second position is an end of the projection area, Control device.

5. The control device according to Claim 2 or 3, Each of the first position and the second position is a position indicated by a projection image projected by the projection device on the projection area, Control device.

6. The control device according to any one of Claims 1 to 5, The control includes control of changing the position of the projection area, Control device.

7. The control device according to any one of Claims 1 to 6, The control includes control of changing the size of the projection area, Control device.

8. The control device according to any one of Claims 1 to 7, The control includes control of correcting distortion of the projection area, Control device.

9. The control device according to any one of Claims 1 to 8, The control includes control for changing the content of the image in the projection area. Control device.

10. The control device according to any one of claims 1 to 9, the processor causes the projection device to project a selection image indicating options of the type of the control, and in a state where the second operation is detected after the third operation for instructing the selection image, performs the control of the type corresponding to the third operation based on the second operation. Control device.

11. The control device according to claim 10, the processor performs the control of the type corresponding to the third operation a plurality of times in a state where the second operation is detected a plurality of times after the third operation. Control device.

12. The control device according to claim 10 or 11, the processor performs control to make the selection image non-projected and project a re-projection image for re-projecting the selection image after detecting the third operation. Control device.

13. A processor of a control device that controls projection by a projection device, acquires information capable of specifying the size of a projection area irradiated with projection light by the projection device based on a first operation from an operator, and performs control of projection by the projection device based on the acquired information and the second operation in a state where the second operation from the operator to the projection area is detected. The first operation includes an operation of instructing a first position and a second position, which are arbitrary positions on the outer periphery of the projection area at the time of receiving the first operation, by an indicator having a sensor capable of detecting movement. The second operation includes an operation of instructing a third position included in the projection area by the indicator in a state where the second position is instructed by the indicator. A control method, the processor specifies the relationship between the size of the number of pixels of the projection image used by the projection device for projection and the size of the projection area based on the information, and performs the control based on the specified relationship and the second operation. Control method.

14. The control method according to claim 13, the processor performs control to acquire the information based on the detection result of the movement of the indicator by the sensor from when the first position is instructed until the second position is instructed. Control method.

15. The control method according to claim 14, The processor performs the control based on at least the detection result of the movement of the indicator by the sensor from when the second position is indicated until the third position is indicated, and the information. Control method.

16. The control method according to claim 14 or 15, Each of the first position and the second position is an end of the projection area. Control method.

17. The control method according to claim 14 or 15, Each of the first position and the second position is a position indicated by a projection image projected by the projection device onto the projection area. Control method.

18. The control method according to any one of claims 13 to 17, The control includes control for changing the position of the projection area. Control method.

19. The control method according to any one of claims 13 to 18, The control includes control for changing the size of the projection area. Control method.

20. The control method according to any one of claims 13 to 19, The control includes control for correcting the distortion of the projection area. Control method.

21. The control method according to any one of claims 13 to 20, The control includes control for changing the content of the image in the projection area. Control method.

22. The control method according to any one of claims 13 to 21, The processor causes the projection device to project a selection image indicating options of the type of the control, and performs the control of the type corresponding to the third operation based on the second operation in a state where the second operation is detected after the third operation for instructing the selection image. Control method.

23. The control method according to claim 22, The processor performs the control of the type corresponding to the third operation a plurality of times in a state where the second operation is detected a plurality of times after the third operation. Control method.

24. The control method according to claim 22 or 23, After detecting the third operation, the processor performs control to stop projecting the selection image and project a re-projection image for re-projecting the selection image. Control method.

25. To the processor of a control device that controls projection by a projection device, Based on a first operation from an operator, acquire information capable of specifying the size of a projection area irradiated with projection light from the projection device. In a state where a second operation from an operator with respect to the projection area is detected, perform control of projection by the projection device based on the acquired information and the second operation. A control program for executing a process, The first operation includes an operation of instructing a first position and a second position, which are arbitrary positions on the outer periphery of the projection area at the time of reception of the first operation, by an indicator having a sensor capable of detecting movement. The second operation includes an operation of instructing a third position included in the projection area by the indicator in a state where the second position is instructed by the indicator. Based on the information, the processor specifies the relationship between the size of the number of pixels of the projection image used by the projection device for projection and the size of the projection area, and performs the control based on the specified relationship and the second operation. Control program.

26. A projection device, Acquire information capable of specifying the size of a projection area irradiated with projection light from the projection device based on a first operation from an operator, and in a state where a second operation from the operator with respect to the projection area is detected, perform control of projection by the projection device based on the acquired information and the second operation. A control device including a processor, A projection system including: The first operation includes an operation of instructing a first position and a second position, which are arbitrary positions on the outer periphery of the projection area at the time of reception of the first operation, by an indicator having a sensor capable of detecting movement. The second operation includes an operation of instructing a third position included in the projection area by the indicator in a state where the second position is instructed by the indicator. Based on the information, the processor specifies the relationship between the size of the number of pixels of the projection image used by the projection device for projection and the size of the projection area, and performs the control based on the specified relationship and the second operation. Projection system.

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