JP6111437B1 - Projector and projector system - Google Patents

Abstract

A projector and a projector system that reduce the volume of the device and the number of devices are provided. A projection unit that displays a first image, a lens unit that projects a first image displayed by the projection unit, and an imaging unit that captures a second image projected by another projector via the lens unit. A calculation unit that calculates a distance between the surface on which the second image is projected and the other projector from the imaging data of the second image captured by the imaging unit and the distance information from the other projector. Then, by using the same lens for the projection unit and the imaging unit, a small projector can be obtained, and when the projector system is configured, the number of devices can be reduced. [Selection] Figure 1

Description

  The present disclosure relates to a projector and a projector system that calculate a distance between a projector and a projection surface of an image projected by the projector.

  In a conventional projector system, two devices, a projector having a projection unit that projects an image and a camera having an imaging unit that captures an image projected by the projector onto a projection surface, are arranged. Alternatively, in the conventional projector system, the projection unit and the imaging unit are mounted at positions separated from each other in one projector, and projection and imaging are performed through different lenses. In the conventional projector system, the imaging unit captures an image projected from the projection unit onto the projection surface, and acquires distance information between the projector and the projection surface from the imaging data.

Japanese Patent No. 4556555

  However, in a projector system that uses a plurality of projectors, the above-described conventional configuration requires the same number of cameras as the projectors, and thus requires a large number of devices and installation locations of the devices. Or, when the projection unit and the imaging unit are mounted in one projector as in the conventional configuration described above, since the lenses for the projection unit and the imaging unit are required, the projector has a large volume and costs. Get higher.

  The present disclosure solves the above-described conventional problems, and an object thereof is to provide a projector and a projector system that reduce the volume of the device and the number of devices.

  In order to solve the above-described conventional problems, a projector according to the present disclosure includes a projection unit that displays a first image, a lens unit that projects a first image displayed by the projection unit, and a second image that is projected by another projector. The distance between the surface on which the second image is projected and the other projector is calculated from the imaging unit that images the image via the lens unit, the imaging data of the second image captured by the imaging unit, and the distance information between the other projectors. A calculating unit.

  A projector system according to the present disclosure includes a first projector that projects a first video, a second projector that projects a second video, and a control box that communicates with the first projector and the second projector. The first projector includes a projection unit that displays the first video, a lens unit that projects the first video displayed by the projection unit, an imaging unit that captures the second video via the lens unit, and the position of the first projector. A first communication unit that transmits information and imaging data of a second video imaged by the imaging unit. The second projector includes a second communication unit that transmits position information of the second projector. The control box receives the position information and imaging data of the first projector from the first communication unit, and receives the position information of the second projector from the second communication unit, the imaging data, and the position of the first projector. The distance information between the first projector and the second projector is calculated from the information and the position information of the second projector, and the distance between the surface on which the second image is projected and the second projector is calculated from the distance information and the imaging data. Part.

  With this configuration, since the projection unit and the imaging unit use the same lens, the projector is small and inexpensive. Furthermore, since the images of other projectors can be taken, the number of devices can be reduced in a projector system constituted by a plurality of projectors.

  According to the projector and the projector system of the present disclosure, the volume of the device and the number of devices can be reduced.

Schematic diagram of projector system according to Embodiment 1 Overview of Projection and Imaging of Projector in Embodiment 1 Arrangement of projection unit and imaging unit in the first embodiment Overview of Projection and Imaging of Projector System in Embodiment 1 Overview of another projector according to the first embodiment Overview of another projector according to the first embodiment Arrangement of other projection units and imaging units in the first embodiment Arrangement of other projection units and imaging units in the first embodiment Schematic diagram of projection and imaging of another projector system in the first embodiment Overview of Projection and Imaging of Projector System in Embodiment 2 Schematic diagram of projection and imaging of another projector system in the second embodiment Schematic diagram of a projector system that projects an image on a projection object in another embodiment

  Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of already well-known matters and repeated descriptions for substantially the same configuration may be omitted. This is to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art.

  The accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

(Embodiment 1)
FIG. 1 is a schematic diagram of projector system S1 in the first embodiment. The projector system S1 includes a plurality of projectors 10 (four are shown in FIG. 1) that project images, and a control box 20 that communicates imaging data and position information with the plurality of projectors 10.

  As shown in FIG. 1, the projector 10 includes a projection unit 11, a lens unit 12, an imaging unit 13, a communication unit 14, and a calculation unit 15.

  The projection unit 11 displays and projects an image projected by the projector 10. The projection unit 11 has a configuration such as a digital mirror device or LCOS (Liquid crystal on silicon).

  The lens unit 12 projects the image projected by the projection unit 11 onto the projection surface while enlarging or reducing the image. The lens unit 12 is configured as a zoom lens, for example.

  The imaging unit 13 captures an image projected on the projection surface by the other projector 10 through the lens unit 12. The imaging unit 13 is configured, for example, as a charge-coupled device (CCD) or a complementary metal oxide semiconductor (CMOS).

  The communication unit 14 communicates with other projectors 10 and the control box 20. The communication unit 14 transmits position information of its own position and projection direction, imaging data captured by the imaging unit 13, distance information between the other projector 10 and the projection surface, and the position and position of the other projector 10. It receives position information in the projection direction and control signals from the control box 20.

  The calculation unit 15 calculates the position of the projector 10 and position information in the projection direction. For example, the calculation unit 15 calculates a position with GPS (Global Positioning System) and calculates a projection direction with a gyro sensor. Then, the calculation unit 15 calculates the interval information between the other projector 10 and the own projector 10 from the position information of the own projector 10 and the position information of the other projector 10 received by the communication unit 14.

  In addition, the calculation unit 15 analyzes the projection direction of the other projector 10 with respect to the projection surface and the self by analyzing the imaging data obtained by the imaging unit 13 imaging the image projected by the other projector 10 on the projection surface. The angle information with respect to the imaging direction of the projector 10 is calculated. For example, the angle information can be calculated by analyzing the positional relationship between the video elements of the video in the imaging data. Here, the calculation unit 15 calculates the angle information by, for example, a spatial encoding method when the projection surface is a solid. Then, the calculation unit 15 performs triangulation using angle information between the projection direction of the other projector 10 on the projection surface and the imaging direction of the own projector 10, and distance information between the other projector 10 and the own projector 10. The distance information between the other projectors 10 and the projection surface is calculated by Equation (1).

L = x / tan θ (Formula 1)
L: Distance between other projector and projection surface x: Distance between other projector and own projector θ: Angle between projection direction of other projector and imaging direction of own projector By providing the calculation unit 15, the projector 10 can obtain accurate distance information between the other projectors 10 and the projection surface.

  As shown in FIG. 1, the control box 20 includes a communication unit 21 and a control unit 22.

  The communication unit 21 communicates with a plurality of projectors 10. The communication unit 21 receives position information about the position of the projector 10 and the projection direction, distance information about the projection surface of the projector 10, and transmits position information about the position of the projector 10 and the projection direction, and a control signal. To do.

  The control unit 22 creates a layout diagram of the projector 10 and the projection surface based on the position information of the projector 10 and the projection direction received by the communication unit 21 and the distance information between the projection surface of the projector 10 and the projection information. Further, when there is a problem in the layout of the projector 10 and the projection surface, a control signal is transmitted via the communication unit 21 in order to eliminate the problem. Further, the control unit 22 includes a recording unit therein, and the position information of the projector 10 and the projection direction received by the communication unit 21, the distance information between the projector 10 and the projection surface, the projector 10 and the projection target The layout of the surface is recorded.

  As described above, in the projector system S1, each projector 10 includes the communication unit 14, and further includes the control box 20, whereby centralized management and advanced data processing can be realized.

  FIG. 2 is a schematic diagram of projection and imaging of the projector 10 according to the first embodiment. FIG. 3 is a layout diagram of the projection unit 11 and the imaging unit 13 when the 3-3 cross section of FIG. 2 is viewed from the direction of the lens unit 12. As shown in FIG. 2, the projector 10 projects an image 30 from the projection unit 11 through the lens unit 12 onto the projection surface 40 as indicated by a thin solid line. In addition, the projector 10 images the periphery of the video 30 with the imaging unit 13 as shown by a broken line from the projection surface 40 through the lens unit 12. As shown in FIGS. 2 and 3, the projection unit 11 is disposed on the optical axis X for projecting an image, and the imaging unit 13 has a larger area than the projection unit 11 when viewed from the optical axis X direction. It arrange | positions in the state exposed from the outer periphery. The imaging unit 13 is disposed on the opposite side of the projection unit 11 from the lens unit 12 on the optical axis X on which an image is projected.

  Thereby, the imaging unit 13 can capture a wide range of the outer periphery of the image 30 projected on the projection surface 40. As described above, the projector 10 has the imaging range outside the projection range of the projected image 30, and thus images the image 30 of another projector 10 projected outside the projector 30 while projecting its own image 30. be able to. Furthermore, since the imaging unit 13 has a larger area than the projection unit 11 and can be disposed behind the projection unit 11 (on the side opposite to the lens unit 12), it does not have to be manufactured in a special shape. That is, the volume of the projector 10 is reduced while suppressing the manufacturing cost.

  Next, projection and imaging of the projector system S1 when a plurality of projectors 10 are arranged will be described with reference to FIG. FIG. 4 is a schematic diagram of the projector system S1 in which a plurality of projectors 10a to 10d (FIG. 4 shows four projectors) project the respective images 30a to 30d.

  The projectors 10a to 10d are arranged side by side in a direction perpendicular to the projection direction, and project images 30a to 30d from the projection units 11 onto the projection surface 40. The images 30a to 30d are projected side by side in the direction perpendicular to the projection direction from the projectors 10a to 10d. The projected images 30a to 30d are preferably adjacent to each other with no gap. However, even if there is an overlap between adjacent images, at least a part of the image 30 projected by the other projector 10 is projected outside the area of the image 30 projected by the own projector 10. An image 30 projected by another projector 10 can be captured.

  As shown in FIG. 4, the projector 10 a captures the video 30 b on the right side of the video 30 a with the imaging unit 13. The projector 10b captures the left image 30a and the right image 30c of the image 30b with the imaging unit 13. The projector 10c captures the left image 30b and the right image 30d of the image 30c by the imaging unit 13. The projector 10d captures an image 30c on the left side of the image 30d with the imaging unit 13. The projectors 10a to 10d use the imaging data of the video 30 of the other projectors 10 captured by the respective imaging units 13 and the position information of the other projectors 10 and the projection direction received by the respective communication units 14. The distance information between the projection surface 40 and the other projector 10 is calculated by each calculation unit 15.

  Thus, the plurality of projectors 10a to 10d capture the images 30a to 30d of the other projectors 10a to 10d, and calculate the distance between the other projectors 10a to 10d and the projection surface 40. As a result, the projector system S1 is composed of half the number of devices as compared with the case where the projection unit and the imaging unit are provided in separate projector and camera devices, respectively.

  Further, the distance between the projector 10b and the projection surface 40 is calculated by the two projectors 10a and 10c. The distance from the projection surface 40 of the projector 10c is calculated by the two projectors 10b and 10d. Therefore, the distance between the projectors 10b and 10c and the projection surface 40 can improve the calculation accuracy. Alternatively, the projectors 10 a and 10 d may be projectors that do not include the imaging unit 13 and the calculation unit 15. Thus, the degree of freedom of the projector system can be increased when one projector captures a plurality of images.

  According to this configuration, the projection unit 11 and the imaging unit 13 use the same lens unit 12, and the projection unit 11 projects an image, and at the same time, the imaging unit 13 captures an image of another projector 10, and the calculation unit 15 The distance information between the projection surface 40 and the projector 10 can be calculated. As described above, since the projection unit 11 and the imaging unit 13 share one lens unit 12, it is possible to reduce the number of apparatuses while reducing the volume and cost of the apparatus included in the projector system.

  Note that the projected image and the captured image may be visible light or invisible light. For example, both visible light may be sufficient and one may be invisible light (infrared light).

  In the present embodiment, four projectors 10 are used, but three projectors and five or more projectors 10 may be used.

  Note that the lens portions 12 of the projectors 10 may be different from each other. By changing the focal length of the lens unit 12 of each projector 10, the projection range and the imaging range can be arbitrarily selected. Thereby, the freedom degree of a projector system can be increased.

  In the present embodiment, the position information of the other projectors 10 is received by the communication unit 14 and the interval information is calculated by the calculation unit 15. However, a plurality of projectors 10 may be arranged at predetermined intervals. The interval information at the time of arrangement may be recorded in the recording unit of the calculation unit 15 of each projector 10. By doing so, it is also possible to configure a projector and a projector system that do not include the communication unit 14.

  In the present embodiment, the shapes of the projection unit 11 and the imaging unit 13 are rectangular, but the shape is not particularly limited. For example, the projection unit 11 and the imaging unit 13 may be circular or may have a shape with chamfered corners. In particular, the imaging unit 13 can use a wide range of the image circle by expanding the imaging range by matching the shape with the image circle of the lens as compared with a rectangular shape.

  In the present embodiment, the projection unit 11 and the imaging unit 13 are in contact with each other as shown in FIG. 1, but the interval between the projection unit 11 and the imaging unit 13 is not particularly limited. For example, the projection unit 11 and the imaging unit 13 may be separated from each other, or a plate 16 made of metal or resin may be disposed between the projection unit 11 and the imaging unit 13 as shown in FIG. In this case, the range in which the imaging unit 13 does not capture can be clearly divided, and the imaging sensitivity can be improved.

  In the present embodiment, the projection unit 11 and the imaging unit 13 are arranged so as to overlap each other on the optical axis X. However, the optical path may be divided using an optical path dividing unit. As shown in FIG. 6, the projector 10 includes a prism 17 as an optical path dividing unit, and the projection unit 11 and the imaging unit 13 are arranged on different surfaces of the prism 17. Visible light from the projection unit 11 travels straight through the prism 17 and is projected through the lens unit 12. The invisible light to be imaged is reflected by the prism 17 through the lens unit 12 and imaged by the imaging unit 13. With this configuration, it is not necessary to overlap the projection unit 11 and the imaging unit 13, and parts including the imaging unit 13 having a large area are not necessary, and the cost can be reduced. Further, the imaging range in the imaging unit 13 can be set to a desired range by changing the reflection angle of the prism 17. Further, the optical path dividing unit may be a flat dichroic mirror or a diffraction grating, for example, other than the prism. If the wavelengths of the light to be split are the same or close, a half mirror can be used for the optical path splitting unit.

  In the present embodiment, the imaging unit 13 is arranged so as to surround the entire circumference of the projection unit 11, but the entire circumference may not be enclosed. For example, as illustrated in FIG. 7, the imaging unit 13 may not be on the right side of the projection unit 11. In this case, the imaging unit 13 on the left side of the projection unit 11 can capture a wider range of images. As described above, the imaging units 13 do not have to be evenly arranged outside the projection unit 11, and the arrangement can be biased according to the position of the image 30 to be imaged.

  In the present embodiment, one imaging unit 13 is provided, but a plurality of imaging units 13 may be provided. For example, as shown in FIG. 8, four imaging units 13 may be arranged on the top, bottom, left, and right of the projection unit 11, or one imaging unit 13 may be arranged beside the one projection unit 11. In this case, since a component having a small imaging unit 13 can be used, the manufacturing cost can be reduced as compared with the case of using a component having a large imaging unit 13 or a component having a special shape.

  In the present embodiment, as shown in FIG. 4, the case where the entire image 30 of another projector 10 adjacent to one projector 10 is imaged is shown. For example, the projector 10b adjacent to the projector 10a, 10c is shown. As shown in FIG. 9 in which two images 10b are captured in half, the images 30 of other projectors 10 adjacent to the two projectors 10 may be captured in half. In this case, the area of the imaging unit 13 can be reduced.

  In the present embodiment, the projector 10 includes the calculation unit 15, but the control box 20 may include the calculation unit. In that case, the projector 10 transmits its own position information and imaging data obtained by imaging the image of the other projector 10 through the communication unit 14, and the control box 20 transmits the position information transmitted from each projector 10 through the communication unit 21. The calculation unit included in the control box 20 may calculate the distance between the projection surface 40 of the video and each projector 10 from the position information and the imaging data.

(Embodiment 2)
In the first embodiment, a plurality of projectors 10 are arranged in a horizontal row, and an image 30 of two other projectors 10 in which one projector 10 is arranged on both sides is captured, and two other projectors 10 are taken. The calculation of the distance between the projection surface 40 and the projection surface 40 has been described. In the second embodiment, a plurality of projectors 10 are arranged in a grid pattern, and an image 30 of one other projector 10 in which one projector 10 is arranged nearby is imaged, and one other projector 10 is taken. And the point of calculating the distance between the projection surface 40 and the first embodiment.

  FIG. 10 is a schematic diagram of projector system S2 in the second embodiment. In FIG. 10, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  A plurality of projectors 10a to 10d (showing four in FIG. 10) are arranged in a grid pattern, and project images 30a to 30d, respectively, in a grid pattern. Then, each of the projectors 10a, 10b, 10c, and 10d captures images 30b, 30c, 30d, and 30a of the projectors 10b, 10c, 10d, and 10a that are located in a lattice shape and are counterclockwise. The broken lines shown in FIG. 10 indicate the correspondence between the projectors 10a, 10b, 10c, and 10d and the images 30b, 30c, 30d, and 30a captured by the projectors 10a, 10b, 10c, and 10d, respectively.

  That is, the projector 10a captures the image 30b of the projector 10b while projecting the image 30a. The projector 10b captures the image 30c of the projector 10c while projecting the image 30b. The projector 10c captures the image 30d of the projector 10d while projecting the image 30c. The projector 10d captures the image 30a of the projector 10a while projecting the image 30d.

  The projector system will be described as a projector system in which n projectors 10k (n = 4 in FIG. 10) are arranged in a grid pattern. The projector 10k projects the video image 30k in a grid pattern in the same manner as the arrangement of the projector 10k. Then, the projector 10k captures an image 30k of another adjacent projector 10k as indicated by a broken line in FIG. Which other projector 10k image 30k is picked up by the projector 10k can be appropriately set according to the grid-like arrangement of the projector 10k.

  That is, in the present embodiment, the grid-like arrangement of the projectors 10 is 2 rows × 2 columns, but other arrangements may be used. For example, in the case of 2 rows × (3 columns or more) and (3 rows or more) × 2 columns, as shown in FIG. 10, all the images 30 of the other projectors 10 are captured counterclockwise or clockwise. The distance between the projector 10 and the projection surface 40 can be measured. Further, in the case of (3 rows or more) × (3 columns or more), the images 30 of other projectors 10 are similarly imaged for the plurality of projectors 10 on the outermost periphery and the plurality of projectors 10 forming a loop inside thereof. can do.

  In addition, each projector 10k is a projection unit 11 that displays an image 30k, a lens unit 12 that projects an image 30k displayed by the projection unit 11, and an image that captures an image 30 projected by another projector 10k through the lens unit 12. Unit 13 and calculation unit 15. Then, the calculating unit 15 calculates the distance between the other projector 10k and the projection surface 40 of the image 30k of the other projector 10k from the imaging data of the image 30k of the other projector 10k imaged by the imaging unit 13. That is, each of the projectors 10k (k = 1 to n−1) includes a calculation unit 15 that calculates the distance between the projection surface 40 of the video 30k + 1 and the projector 10k + 1 from the imaging data of the video 30k + 1 captured by the imaging unit 13. The projector 10k (k = n) determines the distance between the projection surface 40 of the video 30k (k = 1) and the projector 10k (k = 1) from the imaging data of the video 30k (k = 1) captured by the imaging unit 13. A calculating unit 15 for calculating is provided.

  As described above, the plurality of projectors 10k capture the images 30k of the other projectors 10k with each other, thereby enabling a lot of projection and distance detection by imaging. With such a configuration, a projector system S2 having a wide projection range and imaging range in the vertical and horizontal directions can be realized. At that time, the projector system S2 is configured by half the number of devices as compared with the case where the conventional projection unit and imaging unit are provided in separate devices of the projector and the camera, respectively.

  In the present embodiment, FIG. 10 shows a case where four projectors 10a to 10d are arranged in a grid pattern, but n projectors 10k (k = 1 to n) are arranged horizontally as shown in FIG. You may arrange in a line. At this time, the projector 10k projects the video 30k in a horizontal row in the same manner as the arrangement of the projector 10k. Then, the projector 10k (k = 1 to n−1) captures the video 30k of the other projector 10k + 1 adjacent to the right, and the projector 10k (k = n) is the other leftmost projector 10k (k = 1). ) Image 30k (k = 1). In this case, the projector 10k (k = n) needs to arrange the imaging unit 13 at a position where the video 30k (k = 1) can be captured.

(Other embodiments)
In the first and second embodiments, the projection surface 40 has been described on the assumption that it has a planar shape and is fixed, but the projection surface 40 may have a three-dimensional shape, You may move the projection area of a projector system. That is, the projection surface 40 may be the surface of a projection object such as a ball, a balloon, or clothes worn by a person, and the projection object may move.

  FIG. 12 is a schematic diagram of a projector system that projects an image on a moving projection object 50. The four projectors 10a to 10d are arranged in a horizontal row and project the images 30a to 30d on the virtual projection surface 41, respectively. As described in the first embodiment, the projectors 10 a to 10 d can capture images projected by other projectors by the respective imaging units 13. The broken lines shown in FIG. 12 indicate the imaging ranges of the projectors 10a to 10d. The imaging range can be changed by the configuration of the imaging unit 13 as described in the first embodiment. In the example shown in FIG. 12, the projection object 50 is moving in the right direction (the direction from the projector 10 a toward the projector 10 d) on the virtual projection surface 41. A part of each image 30b, 30c projected by the projectors 10b, 10c is projected on the surface of the projection object 50.

  The image 30b projected on the projection object 50 is imaged by the imaging unit 13 of the projector 10a, and the projector 10a obtains image data of the image 30b. The calculation unit 15 of the projector 10a calculates the distance between the projector 10b and the surface of the projection object 50 on which the video 30b is projected, from the imaging data of the video 30b and the interval information between the projectors 10a and 10b. Similarly, the image 30b projected on the projection object 50 is also imaged by the imaging unit 13 of the projector 10c, and the calculation unit 15 of the projector 10c can also calculate the distance between the projector 10b and the surface of the projection object 50. . Similarly, the image 30c projected on the projection object 50 is picked up by the respective imaging units 13 of the projectors 10b and 10d, and the projection object 50 on which the projector 10c and the image 30c are projected by the respective calculation units 15 is obtained. The distance from the surface is calculated.

  Thus, by calculating the respective distances between the projectors 10b and 10c and the surfaces of the projection objects on which the respective images 30b and 30c are projected, for example, the two projected on the surface of the moving projection object It is possible to control the images 30b and 30c so that they are continuous without interruption.

  Since the projector and the projector system according to the present disclosure can reduce the volume of the device and the number of devices, the projector and the projector system are useful as a projector and the like because they can be easily installed at low cost.

S1, S2 Projector system 10, 10a, 10b, 10c, 10d, 10k Projector 11 Projection unit 12 Lens unit 13 Imaging unit 14 Communication unit 15 Calculation unit 16 Plate 17 Prism 20 Control box 21 Communication unit 22 Control unit 30, 30a, 30b , 30c, 30d, 30k Video 40 Projected surface 41 Virtual projected surface 50 Projected object

Claims (14)

A projection unit for displaying the first image;
A lens unit that projects the first image displayed by the projection unit;
An imaging unit for imaging a second image projected by another projector through the lens unit;
A calculation unit that calculates a distance between a surface on which the second video is projected and the other projector from imaging data of the second video captured by the imaging unit and distance information from the other projector. ,
projector. The calculation unit calculates angle information between the projection direction of the second image and the imaging direction based on the position of the image projected by the other projector in the imaging data of the second image, and the angle information and the interval information And calculating the distance between the surface on which the second image is projected and the other projector.
The projector according to claim 1. A communication unit that receives position information of the other projector from the other projector;
The calculation unit calculates the interval information based on the position information of the other projector received by the communication unit.
The projector according to claim 1 or 2. The projection unit is disposed on an optical axis of the first image to be projected;
The imaging unit is disposed outside the projection unit with respect to the optical axis.
The projector according to claim 1. Comprising a plurality of the imaging units;
The projector according to claim 4. The imaging unit is disposed on the opposite side of the projection unit from the lens unit in the direction of the optical axis.
The projector according to claim 4. The imaging unit is disposed on the opposite side of the projection unit from the lens unit on the optical axis of the first image to be projected, and has a larger area than the projection unit.
The projector according to claim 1. An optical path splitting unit that splits an optical path from the projection unit to the lens unit and an optical path from the lens unit to the imaging unit;
The projector according to claim 1. At least a part of the second image captured by the imaging unit is outside the region of the first image projected from the projection unit.
The projector according to claim 1. A first projector which is the projector according to claim 1;
A second projector which is the other projector,
Projector system. The second projector is
A second projection unit for displaying the second image;
A second lens unit that projects the second image displayed by the second projection unit;
A second imaging unit for imaging the first video through the second lens unit;
The distance between the surface on which the first image is projected and the first projector is calculated from the imaging data of the first image captured by the second imaging unit and the distance information between the first projector and the second projector. A second calculation unit
The projector system according to claim 10. A third projector for projecting a third image;
The calculation unit includes:
The distance between the surface on which the third video is projected and the third projector is calculated from the imaging data of the third video captured by the imaging unit and the distance information between the third projector and the first projector. ,
The projector system according to claim 10 or 11. N (n is an integer) number of first to n-th projectors, each of which is the projector according to claim 1,
The other projectors corresponding to the first to n-1 projectors are the second to nth projectors, respectively.
The other projector corresponding to the nth projector is the first projector.
Projector system. A first projector for projecting a first image;
A second projector for projecting a second image;
A control box for communicating with the first projector and the second projector,
The first projector is
A projection unit for displaying the first image;
A lens unit that projects the first image displayed by the projection unit;
An imaging unit for imaging the second video through the lens unit;
A first communication unit that transmits position information of the first projector and imaging data of the second video imaged by the imaging unit;
The second projector is
A second communication unit for transmitting position information of the second projector;
The control box is
A third communication unit that receives the position information and the imaging data of the first projector from the first communication unit, and receives the position information of the second projector from the second communication unit;
Interval information between the first projector and the second projector is calculated from the imaging data, the position information of the first projector, and the position information of the second projector, and the first information is calculated from the interval information and the imaging data. A calculation unit that calculates a distance between a surface on which two images are projected and the second projector;
Projector system.