JP2021140166A - projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently devise an appropriate configuration and arrangement in consideration of a projection distance for a built-in camera.
A projector includes a projection lens, a first imaging unit that images the projection surface, and a second imaging unit that images the projection surface at a wider angle of view than the first imaging unit. The first imaging unit is arranged with respect to the optical axis of the projection lens by a first distance in a direction perpendicular to the optical axis, and the second imaging unit is arranged with respect to the optical axis of the projection lens. , The second distance, which is longer than the first distance, is displaced in the direction perpendicular to the optical axis.
[Selection diagram] Fig. 1

Description

The present invention relates to a projector.

There is known a system that captures the projection state of a projector with a built-in camera, measures the projection color, projection position, etc., and automatically performs appropriate correction (Patent Documents 1 and 2).

Japanese Unexamined Patent Publication No. 2015-167341 Japanese Unexamined Patent Publication No. 2014-1977939

By the way, in general, the projection distance of the projector may be set in various ways depending on the usage status of the projector. The built-in camera is required to be able to capture the state of the screen (projection surface) regardless of the projection distance of the projector. However, in the past, the actual situation was that the built-in camera was not sufficiently devised in terms of an appropriate configuration and arrangement in consideration of the projection distance.

The present invention has been made to solve at least a part of the above-mentioned problems, and can be realized as the following forms or application examples.

(1) According to one embodiment of the present invention, a projector that projects an image on a projection surface is provided. This projector includes a projection lens; a first imaging unit that images the projection surface; and a second imaging unit that images the projection surface at a wider angle of view than the first imaging unit. The first imaging unit is arranged with respect to the optical axis of the projection lens by a first distance in a direction perpendicular to the optical axis, and the second imaging unit is arranged with respect to the optical axis of the projection lens. , The second distance, which is longer than the first distance, is displaced in the direction perpendicular to the optical axis.
According to this projector, since the second imaging unit that captures the projection surface with a wider angle of view is arranged at a position farther from the optical axis of the projection lens, the wide angle of view of the second imaging unit and the projection lens It is possible to prevent interference with the outer shape.

(2) The projector is further mounted on a lens mounting portion in which a first projection lens for long-distance projection and a second projection lens for short-distance projection are interchangeably mounted; A lens information acquisition unit for acquiring projection lens identification information for identifying a projection lens; a control unit; the control unit indicates that the first projection lens is attached to the lens attachment portion. When the identification information indicates, the projection surface is imaged by the first imaging unit, and when the projection lens identification information indicates that the second projection lens is attached to the lens mounting unit, the projection lens identification information indicates. The projection surface may be imaged by the second imaging unit.
According to this configuration, it is possible to have an appropriate imaging unit perform imaging according to the mounted projection lens.

(3) In the projector, the projection lens is a zoom lens whose focal length can be changed, and the projector further includes a lens information acquisition unit that acquires zoom information indicating the focal length of the projection lens; and a control unit. When the zoom information indicates that the focal length is equal to or greater than a predetermined threshold value, the control unit causes the first imaging unit to image the projection surface, and the focal length is set. When the zoom information indicates that the focal length is less than the threshold value, the projection surface may be imaged by the second imaging unit.
According to this configuration, it is possible to have an appropriate imaging unit perform imaging according to the focal length of the projection lens.

(4) In the projector, the first imaging unit and the second imaging unit may have different appearances from each other.
According to this configuration, when a problem occurs in either the first imaging unit or the second imaging unit, the projector user can accurately determine which one has the problem.

(5) The projector may further include an adjusting unit that adjusts the projected image projected on the projection surface based on the captured image captured by the first imaging unit or the second imaging unit. good.
According to this configuration, it is possible to appropriately adjust the projected image projected on the projection surface based on the captured image captured by the first imaging unit or the second imaging unit.

The present invention can be realized in various forms, for example, a projector, a control method thereof, a computer program for realizing those functions, and a non-transitory recording medium (non-transitory) in which the computer program is recorded. It can be realized in various forms such as storage medium).

A front view showing a state in which a projection lens for long-distance projection is attached to a projector. A perspective view of FIG. 1 as viewed from above. A front view showing a state in which a projection lens for short-range projection is attached to a projector. A perspective view of FIG. 3 as viewed from above. The figure which shows an example of the appearance of the 1st camera and the 2nd camera. The figure which shows another example of the appearance of the 1st camera and the 2nd camera. The figure which shows still another example of the appearance of the 1st camera and the 2nd camera. The functional block diagram of the projector in 1st Embodiment. The functional block diagram of the projector in the 2nd Embodiment.

A. Arrangement of Projector Lens and Built-in Camera FIG. 1 is a front view showing a state in which a first projection lens 210 for long-distance projection is attached to a projector 100, and FIG. 2 is a perspective view of the projector 100 as viewed from above. .. The front panel 110 of the projector 100 is provided with a first projection lens 210 and two built-in cameras 310 and 320 that capture images projected on the projection surface. The first projection lens 210 is interchangeably mounted on the lens mounting portion 230. As shown in FIG. 2, the lens barrel of the first projection lens 210 projects from the front panel 110 by the amount of protrusion D1.

The first camera 310 is a first imaging unit for long-distance photography, and the second camera 320 is a second imaging unit for short-distance photography. These cameras 310 and 320 preferably have one or more differences among the following (1) to (3), and the following (1) is the most typical difference.
(1) The angle of view θ2 (FIG. 2) of the second camera 320 for short-distance shooting is wider than the angle of view θ1 of the first camera 310 for long-distance shooting.
(2) The focus position of the second camera 320 for short-distance photography is closer than the focus position of the first camera 310 for long-distance photography.
(3) The resolution of the second camera 320 for short-distance shooting is lower than the resolution of the first camera 310 for long-distance shooting (the number of pixels is small).

The first camera 310 for long-distance photography is arranged at a position separated by a first distance L1 in a direction perpendicular to the optical axis CX with respect to the optical axis CX of the first projection lens 210. The second camera 320 for short-distance photography is arranged at a position separated from the optical axis CX of the first projection lens 210 by a second distance L2, which is longer than the first distance L1 in the direction perpendicular to the optical axis CX. ing. The reason for this will be described later.

FIG. 3 is a front view showing a state in which the second projection lens 220 for short-range projection is attached to the projector 100, and FIG. 4 is a perspective view of the projector 100 as viewed from above. As shown in FIG. 4, the lens barrel of the second projection lens 220 protrudes from the front panel 110 by the amount of protrusion D2. In a typical example, the protrusion amount D2 of the second projection lens 220 for short-distance projection is larger than the protrusion amount D1 (FIG. 2) of the first projection lens 210 for long-distance projection. The reason for this is that the second projection lens 220, which projects an image at a shorter distance, has a larger lens aperture than the first projection lens 210, and the lens barrel tends to be longer accordingly.

As described above, the second camera 320 for short-distance photography is arranged at a position farther from the projection lenses 210 and 220 than the first camera 310 for long-distance photography. The reason for this is that, in general, the second camera 320 for short-distance shooting has a wider angle of view than the first camera 310 for long-distance shooting, so that the second camera 320 is arranged at a position close to the projection lens 220. This is because the lens barrel of the projection lens 220 may enter the angle of view of the second camera 320, and the entire projected image on the screen surface may not be captured. Further, even when the entire projected image on the screen surface can be captured, if the lens barrel of the projection lens 220 is within the angle of view of the second camera 320, the external light is reflected by the lens barrel of the projection lens 220. The reflected light may enter the second camera 320 and cause a large noise in the captured image. The possibility of these problems occurring is that the protrusion amount D2 of the second projection lens 220 for short-distance projection is larger than the protrusion amount D1 (FIG. 2) of the first projection lens 210 for long-distance projection. This is even more remarkable when the diameter of the second projection lens 220 is larger than the diameter of the first projection lens 210. Therefore, in order to minimize the above-mentioned influence in the limited space of the front panel 110 of the projector 100 while considering the design, the projection lens 210 is compared with the first camera 310 for long-distance photography. A second camera 320 for short-distance photography is arranged at a position farther from the optical axis CX of 220.

When the distance (projection distance) between the projector 100 and the projection surface is changed, the farther the cameras 310 and 320 are from the optical axis CX of the projection lenses 210 and 220, the more the position of the projected image in the captured image is. The change will be large. However, since the second camera 320, which is arranged farther from the optical axes CX of the projection lenses 210 and 220 than the first camera 310, has a wider angle of view than the first camera 310, the projected image in the captured image Even if the position changes, it can be kept within the angle of view.

The cameras 310 and 320 may be arranged so as to be arranged in the horizontal direction (horizontal direction) as in the examples of FIGS. 1 to 4, or the optical axes of the projection lenses 210 and 220 may be arranged. It may be arranged at an arbitrary position such as a concentric position centered on the CX. When three or more cameras are provided in the projector, the cameras with a wider angle of view may be sequentially arranged so as to be arranged at positions farther from the optical axes CX of the projection lenses 210 and 220.

When the lens barrels of the projection lenses 210 and 220 are within the angle of view of the cameras 310 and 320, the lens barrels of the projection lenses 210 and 220 are made of a material having low reflectivity (for example, a diffuse reflective material having fine irregularities). It is preferable to prepare with.

Further, it is preferable that the cameras 310 and 320 are arranged above the optical axis CX of the projection lenses 210 and 220. The reason for this is that when the projector 100 is placed on a desk or the like and the cameras 310 and 320 are arranged on the lower side, the desk or the like falls within the angle of view of the cameras 310 and 320, and the screen. This is because it may not be possible to capture the entire projected image on the surface. Further, even when the entire projected image can be captured, if the desk or the like is within the angle of view of the cameras 310 or 320, the outside light is reflected by the desk or the like and the reflected light is incident on the cameras 310 or 320. There is a possibility of causing a large noise in the captured image. In particular, since the second camera 320 having a wider angle of view is more likely to have such a problem, the second camera may be arranged above the first camera 310.

5, FIG. 6 and FIG. 7 are views showing various examples of the appearance of the first camera 310 and the second camera 320. In these examples, the appearances of the first camera 310 for long-distance photography and the second camera 320 for short-distance photography can be easily distinguished from each other with the naked eye. In this way, if a problem occurs with either the camera 310 or 320, the user of the projector 100 can accurately determine which camera has the problem, and the support center can be inquired smoothly. Can be done. Further, when a problem occurs in one of the cameras, a message prompting the camera to be replaced may be displayed, and the appearance characteristics of the camera to be replaced may be indicated by words, illustrations, or the like. In addition, the user may be able to recognize which camera is currently used by showing the appearance characteristics of the camera in use on the menu screen or the like with words or illustrations.

B. Functional block of the projector of the first embodiment FIG. 8 is a functional block diagram of the projector of the first embodiment. The projector 100 includes a control unit 400, an operation panel 500, a projection unit 200, a projection image generation unit 600, a lens information acquisition unit 700, and an image pickup unit 300. The imaging unit 300 has the above-mentioned first camera 310 for long-distance shooting and the second camera 320 for short-distance shooting.

The control unit 400 controls each unit inside the projector 100. Further, the control unit 400 has a function of causing either the first camera 310 or the second camera 320 to image the projection surface SC (screen surface) according to the information acquired by the lens information acquisition unit 700.

The projection image generation unit 600 has a function of generating a projection image projected on the projection surface SC by the projection unit 200, and has a projection image memory 610 for storing the projection image and an adjustment unit 620 for adjusting the projection image. And have.

The adjustment unit 620 adjusts the projected image projected on the projection surface SC based on the captured image captured by the first camera 310 or the second camera 320. This adjustment process preferably includes, for example, keystone correction for correcting trapezoidal distortion of the projected image and color correction for the projected image. When performing color correction of a projected image, a measurement pattern for measuring the color of the projected light is projected from the projection unit 200, the projected color is measured by the first camera 310 or the second camera, and the color of the projected light is measured. To correct. Specifically, the gain value for adjusting the balance of red, green, and blue at multiple gradation levels, the amount of brightness correction for correcting gamma characteristics, and each for correcting in-plane color unevenness. Calculate the correction data etc. at the point. Then, the adjustment unit 620 uses these correction values to perform correction so that the projected light of the projector 100 has a desired color tone.

The projection unit 200 has a function of projecting the projected image generated by the projection image generation unit 600 on the projection surface SC. The projection unit 200 includes a light modulation unit 240 and a light source 250 in addition to the projection lens 210 and the lens mounting unit 230 described with reference to FIG. The light modulation unit 240 forms the projected image light by modulating the light from the light source 250 according to the projected image data given from the projected image memory 610. The projected image light is typically color image light including visible light of three colors of RGB, and is projected on the projection surface SC by the projection lens 210. As the light source 250, in addition to a light source lamp such as an ultra-high pressure mercury lamp, various light sources such as a light emitting diode and a laser diode can be adopted. Further, as the optical modulation unit 240, a transmission type or reflection type liquid crystal panel, a digital mirror device, or the like can be adopted, and a configuration may be configured in which a plurality of optical modulation units 240 are provided for each color light.

The lens information acquisition unit 700 acquires projection lens identification information that identifies the projection lens 210 (or 220) mounted on the lens mounting unit 230. In the example of FIG. 8, a physical or electrical discrimination bit is provided at the connection portion between the lens mounting portion 230 and the projection lens 210 (or 220), and the lens identification signal LID indicating the value of the discrimination bit is mounted on the lens. It is supplied from the unit 230 to the lens information acquisition unit 700. The lens information acquisition unit 700 can acquire projection lens identification information for identifying the currently mounted projection lens 210 (or 220) according to the lens identification signal LID and supply it to the control unit 400. be. The control unit 400 determines which of the two projection lenses 210 and 220 is attached to the lens attachment unit 230 according to the projection lens identification information. When the first projection lens 210 is attached to the lens attachment unit 230, the control unit 400 causes the first camera 310 to take an image of the projection surface SC. On the other hand, when the second projection lens 220 is attached to the lens attachment portion 230, the projection surface SC is imaged by the second camera 320. In this way, it is possible to select and image an appropriate camera from the cameras 310 and 320 according to the projection lens actually mounted.

Instead of receiving the lens identification signal LID from the lens mounting unit 230, the lens information acquisition unit 700 responds to a user's instruction using the operation panel 500 or a remote controller (not shown), and the currently mounted projection The projection lens identification information that identifies the lens 210 (or 220) may be acquired.

C. Functional block of the projector of the second embodiment FIG. 9 is a functional block diagram of the projector of the second embodiment. The difference from the first embodiment shown in FIG. 8 is that a zoom lens 260 capable of changing the focal length (angle of view) is used instead of the interchangeable projection lens 210, and the lens information acquisition unit 700a. However, there are two points, that is, a point of acquiring zoom information indicating the focal length of the zoom lens 260, and other configurations are the same as those of the first embodiment.

The lens information acquisition unit 700a acquires zoom information indicating the focal length of the zoom lens 260. Specifically, for example, a sensor capable of detecting the zoom position of the zoom lens 260 is attached to the zoom lens 260, and zoom information is acquired based on the detected zoom position. When the zoom information indicates that the focal length is equal to or greater than a predetermined threshold value, the control unit 400 causes the first camera 310 to take an image of the projection surface SC. On the other hand, when the zoom information indicates that the focal length is less than the threshold value, the projection surface SC is imaged by the second camera 320. In this way, a more appropriate camera among the cameras 310 and 320 can be selected and imaged according to the actual focal length.

The lens information acquisition unit 700a may acquire zoom information by a method other than detecting the zoom position by the sensor described above. For example, an image including a predetermined pattern may be projected onto the projection surface SC, photographed by the wide-angle second camera 320, and zoom information may be derived based on the position and size of the pattern in the captured image.

Further, the zoom information may be any information that can be replaced with the focal length, and is not limited to the information indicating the focal length itself. For example, information indicating the zoom ratio and information indicating the angle of view are also included in "zoom information indicating the focal length". That is, the zoom information may be any information indicating the zoom state of the zoom lens 260.

Even in a configuration in which the zoom lens 260 is interchangeable as in the first embodiment, if the threshold value is changed according to the mounted zoom lens, it is appropriate according to the mounted zoom lens and the focal length. It is also possible to select a camera and take an image. In this case, the lens information acquisition unit 700a acquires the projection lens identification information and the zoom information, and the control unit 400 selects an appropriate camera based on the information.

The present invention is not limited to the above examples and embodiments, and can be implemented in various embodiments without departing from the gist thereof.

For example, when selecting a camera based on zoom information, the table is not limited to directly comparing the focal length with the threshold value, and a table in which a plurality of zoom information is associated with the camera according to the comparison result with the threshold value is shown. The camera may be selected in advance based on the acquired zoom information and the table.

Further, for example, in a configuration in which a camera is selected based on zoom information, the size of the projected image (imaging projection size) in the captured image of the wide-angle second camera 320 can be determined between the case where the zoom lens 260 is at the telephoto end and the case where the zoom lens 260 is at the wide end. Both cases are stored in the storage unit in advance, and the control unit 400 estimates the actual imaging projection size by proportionally interpolating the two imaging projection sizes according to the acquired zoom information, and estimates the imaging projection. Cameras may be selected based on size.

Further, the projection surface on which a predetermined image (for example, an all-white image) is projected is photographed by the wide-angle second camera 320, the position and size of the projection image in the captured image are detected, and the position of the detected projection image is detected. The camera may be selected according to the size and size.

It is also possible that the lens information acquisition units 700 and 700a acquire projection distance information indicating the distance (projection distance) between the projector 100 and the projection surface SC. In this case, the control unit 400 may select the camera based on the projection distance information, or may change the threshold value for selecting the camera based on the projection distance information. In order to acquire the projection distance information, the projected image stored in the projected image memory 610 and the captured image projected on the projection surface SC by the first camera 310 or the second camera 320 are used. You can use the triangulation that you had. Further, a sensor capable of acquiring the focus position may be attached to the projection lens to calculate the projection distance based on the focus position, or a distance sensor may be provided to directly measure the projection distance.

It is also possible to select a camera according to the adjustment content performed by the adjustment unit 620. For example, in a mode in which a plurality of projectors project images side by side, when the adjustment unit 620 adjusts its own projected image based on the projected image of another projector, it is projected by another projector together with its own projected image. It is necessary to select a camera that can also capture images. On the other hand, when the adjustment unit 620 makes adjustments based only on its own projected image, at least a camera capable of capturing its own projected image may be selected. In this case, the adjustment information acquisition unit (not shown) acquires the adjustment content specified by the user by the operation panel 500 or the remote controller as adjustment information, and the control unit 400 selects an appropriate camera based on the adjustment information. The camera may be selected based on the two pieces of information of the projection lens identification information and the adjustment information, the two pieces of information of the zoom information and the adjustment information, or the three pieces of information of the projection lens identification information, the zoom information and the adjustment information. ..

100 ... Projector, 110 ... Front panel, 200 ... Projection unit, 210 ... First projection lens, 220 ... Second projection lens, 230 ... Lens mounting unit, 240 ... Light modulation unit, 250 ... Light source, 260 ... Zoom lens, 300 ... Imaging unit, 310 ... 1st camera, 320 ... 2nd camera, 400 ... Control unit, 500 ... Operation panel, 600 ... Projection image generation unit, 610 ... Projection image memory, 620 ... Adjustment unit, 700, 700a ... Lens information Acquisition unit, CX ... optical axis, D1, D2 ... lens protrusion amount, L1 ... first distance, L2 ... second distance, LID ... lens identification signal, SC ... projection surface, θ1, θ2 ... angle of view

The present invention has been made to solve at least a part of the above-mentioned problems, and can be realized as the following forms or application examples.
<First form>
First embodiment of the present invention is a projector that projects an image on a projection surface, imaging and projection lens, to image the projection surface, a first imaging unit for long range imaging, pre SL projection surface , A second imaging unit for short-distance photography, a lens mounting unit in which a first projection lens for long-distance projection and a second projection lens for short-distance projection are interchangeably mounted, and a lens mounting portion mounted on the lens mounting portion. It includes a lens information acquisition unit for acquiring projection lens identification information for identifying a projection lens, and a control unit . When the projection lens identification information indicates that the first projection lens is mounted on the lens mounting portion, the control unit causes the first imaging unit to image the projection surface, and the lens mounting portion. When the projection lens identification information indicates that the second projection lens is mounted on the subject, the projection surface is imaged by the second imaging unit.
<Second form>
A second embodiment of the present invention is a projector that projects an image on a projection surface, a projection lens that is a zoom lens whose focal length can be changed, and a first imaging for long-distance shooting that images the projection surface. It includes a unit, a second imaging unit for short-distance shooting that images the projection surface, a lens information acquisition unit that acquires zoom information indicating the focal length of the projection lens, and a control unit. When the zoom information indicates that the focal length is equal to or greater than a predetermined threshold value, the control unit causes the first imaging unit to image the projection surface, and the focal length is less than the threshold value. When the zoom information indicates that, the second imaging unit is used to image the projection surface.
<Third form>
A third embodiment of the present invention is a projector that projects an image on a projection surface, and captures a projection lens, a first imaging unit for long-distance shooting that images the projection surface, and the projection surface. It includes a second imaging unit for short-distance shooting, a lens information acquisition unit that acquires projection distance information indicating the distance between the projector and the projection surface, and a control unit. The control unit determines whether the first imaging unit captures the projection surface or the second imaging unit captures the projection surface according to the projection distance information acquired by the lens information acquisition unit. select.
<Fourth form>
A fourth embodiment of the present invention is a projector that projects an image on a projection surface, and captures a projection lens, a first imaging unit for long-distance shooting that images the projection surface, and the projection surface. Based on the second image pickup unit for short-range shooting and the image captured by the first image pickup unit or the second image pickup unit, the projection image projected on the projection surface by the projection lens is adjusted. It includes an adjusting unit and a control unit. The control unit adjusts the projected image based on an image projected by another projector different from the projector, or adjusts the projected image based on an image projected by the projector. Depending on the situation, the first imaging unit may be used to image the projection surface, or the second imaging unit may be used to image the projection surface.
<Fifth form>
A fifth embodiment of the present invention is for projecting an image onto a projection surface on a projector, identifying a projection lens mounted on the projector, and identifying the projection lens for long-distance projection on the projector. When it is determined that the first projection lens of the above is attached, the projection surface is imaged by the first imaging unit for long-distance photography, and by the identification, the projector is used for short-distance projection. When it is determined that the second projection lens is attached, the imaging method is characterized in that the projection surface is imaged by the second imaging unit for short-range imaging.
<Sixth form>
A sixth embodiment of the present invention is to project an image onto a projection surface on a projector, acquire zoom information indicating the focal length of a projection lens mounted on the projector, and determine the focal length in advance. When the zoom information indicates that the focal length is equal to or greater than the specified threshold, the zoom information indicates that the projection surface is imaged by the first imaging unit for long-distance photography and that the focal length is less than the threshold. In the case of, the imaging method is characterized in that the projection surface is imaged by the second imaging unit for short-distance photographing.
<7th form>
A seventh aspect of the present invention is to have a projector project an image on a projection surface, acquire projection distance information indicating a distance between the projector and the projection surface, and respond to the projection distance information. The imaging method is characterized by selecting whether to image the projection surface with the first imaging unit for long-distance photographing or to image the projection surface with the second imaging unit for short-distance photographing.
<8th form>
An eighth embodiment of the present invention is based on projecting an image onto a projection surface on a projector and an image captured by a first imaging unit for long-distance imaging or a second imaging unit for short-distance imaging. The projector adjusts the projected image projected on the projection surface, and the projected image is adjusted based on the image projected by another projector different from the projector, or the projector projects the projected image. It is possible to select whether to adjust the projected image based on the image to be performed, to have the projection surface imaged by the first imaging unit, or to have the projection surface imaged by the second imaging unit. This is an imaging method characterized by.

Claims (5)

A projector that projects an image on the projection surface.
With a projection lens
The first imaging unit that images the projection surface and
A second imaging unit that images the projection surface with a wider angle of view than the first imaging unit, and
With
The first imaging unit is arranged so as to be displaced from the optical axis of the projection lens by a first distance in a direction perpendicular to the optical axis.
The second imaging unit is a projector arranged so as to be displaced from the optical axis of the projection lens in a direction perpendicular to the optical axis by a second distance longer than the first distance. The projector according to claim 1, further
A lens mounting part in which the first projection lens for long-distance projection and the second projection lens for short-distance projection are interchangeably mounted, and
A lens information acquisition unit that acquires projection lens identification information that identifies a projection lens mounted on the lens mounting unit, and a lens information acquisition unit.
Control unit and
With
The control unit
When the projection lens identification information indicates that the first projection lens is attached to the lens mounting portion, the projection surface is imaged by the first imaging unit.
When the projection lens identification information indicates that the second projection lens is attached to the lens mounting portion, the projector causes the second imaging unit to image the projection surface. The projector according to claim 1.
The projection lens is a zoom lens whose focal length can be changed.
The projector further
A lens information acquisition unit that acquires zoom information indicating the focal length of the projection lens, and
Control unit and
With
The control unit
When the zoom information indicates that the focal length is equal to or greater than a predetermined threshold value, the first imaging unit is used to image the projection surface.
When the zoom information indicates that the focal length is less than the threshold value, the projector causes the second imaging unit to image the projection surface. The projector according to any one of claims 1 to 3.
A projector in which the first imaging unit and the second imaging unit have different appearances from each other. The projector according to any one of claims 1 to 4, and further.
A projector including an adjustment unit that adjusts a projected image projected on the projection surface based on an image captured by the first imaging unit or the second imaging unit.

Images