JP2017173402A - Projector and method for controlling projector - Google Patents

Abstract

When another projected image overlaps with a projected image, a specific image is displayed in a region where the images overlap without instructing the projected image.
Projectors 10A and 10B include a projection unit that projects a first image supplied from an external device onto a projection surface, a region of the first image that is projected onto the projection surface by the projection unit, and another device. The determination unit that determines an overlap with the region of the second image projected on the projection surface by the step, and the image that is projected on the overlap region where the first image and the second image overlap is determined according to the determination result of the determination unit. And a projection control unit that controls the projection unit so that the determined image is projected onto the overlapping region.
[Selection] Figure 1

Description

  The present invention relates to a projector and a projector control method.

  As a system for projecting an image with a plurality of projectors, for example, there is a system disclosed in Patent Document 1. This system detects overlapping overlapping areas among the projected areas of images projected from two projectors. When the user designates the projection area of one of the projectors with the area instruction means, the image of the designated area is projected onto the overlapping area. According to this system, only the image of one projector can be projected onto the overlapping area.

JP 2007-79028 A

  In the system of Patent Document 1, the user instructs the projector to project which image of the projector is projected on the overlapping region. In this case, when the projection of the image is finished with one projector that has displayed the image in the overlapping area, the other projector does not project the image in the overlapping area, and thus projects an image in which the overlapping area is missing. It will be. In order to project an image on the overlapping area, the user designates the projection area of the other projector with the area instruction means, which is troublesome for the user.

  The present invention provides a technique for displaying a specific image in a region where an image overlaps without instructing the projected image when another projected image overlaps the projected image.

The present invention provides a projection unit that projects a first image onto a projection plane, a region of the first image that is projected onto the projection plane by the projection unit, and a second image that is projected onto the projection plane from another device. A determination unit for determining an overlap with the region, and an image to be projected on the overlapping region where the first image and the second image overlap is determined according to a determination result of the determination unit, and the determined image is projected on the overlapping region And a projection control unit that controls the projection unit.
According to this configuration, when another projected image overlaps the projected image, it is possible to display a specific image in a region where the images overlap without instructing the projected image.

In the present invention, the projection control unit prevents an image of a portion included in the overlapping region in the first image from being projected when the second image is projected onto the projection plane after the first image. It is good also as a structure which controls the said projection part.
According to this configuration, an image projected later can be preferentially projected onto the overlapping area.

In the present invention, the projection control unit further includes a storage unit that stores priority information indicating the priority of the first image and the second image, and the projection control unit determines that the determination result is the first image and the second image. When it represents that it overlaps with an image, it is good also as a structure which determines the image projected on the said duplication area | region according to the said priority information.
According to this configuration, it is possible to project the first image or the second image on the overlapping area according to the stored priority.

Further, in the present invention, when an image from another projector is projected on the overlapping area, the projection control unit determines an image to be projected on the overlapping area according to a determination result of the determination unit, The projection unit may be controlled so that the determined image is projected onto the overlapping region.
According to this configuration, when an image from another projector is projected onto the projected image, it is possible to display a specific image in a region where the images overlap without instructing the projected image.

In the present invention, the projection control unit may include a portion included in the overlap area in the first image when an image from another projector that has been projected onto the overlap area is no longer projected onto the overlap area. It is good also as a structure which controls the said projection part so that the image of this may be projected on the said overlapping area | region.
According to this configuration, when another image does not overlap the projected image, the projected image can be projected onto the overlapping area.

In the present invention, the projection control unit may project a black image in the overlapping area when the second image projected on the projection plane is an image projected by another projector. It is good also as a structure which controls the said projection part.
According to this configuration, it is possible to project an image from another device onto the area where the black image is projected.

In the present invention, the projection control unit may be configured to control the projection unit so that a white image is projected onto the overlapping area.
According to this configuration, it is possible to illuminate a portion where there is an overlapping area on the projection plane.

In the present invention, there is provided a light projecting unit that projects light representing the region of the first image onto the projection surface, and the determination unit is a light projected onto the projection surface by the light projecting unit. Further, the light projected onto the projection plane by the other device may be detected, and the overlap between the first image area and the second image area may be determined according to the detection result.
According to this configuration, it is possible to determine the overlap of images based on the projected light.

In the present invention, the light projecting unit may project light onto a region where the first image is projected on the projection surface.
According to this configuration, it is possible to determine image overlap while projecting images.

According to another aspect of the present invention, there is provided a method for controlling a projector having a projection unit that projects a first image on a projection plane, the region of the first image projected on the projection plane by the projection unit, and the device by the other device. A determination step for determining an overlap with a region of the second image projected on the projection surface, and an image to be projected on an overlap region where the first image and the second image overlap are determined according to the determination result of the determination step. And an image control step of controlling the projection unit so that the determined image is projected onto the overlapping area.
According to this configuration, when another projected image overlaps the projected image, it is possible to display a specific image in a region where the images overlap without instructing the projected image.

The figure which showed the apparatus which concerns on embodiment of this invention. The block diagram which showed the hardware constitutions of projector 10A, 10B. The functional block diagram of the control part 110. FIG. The flowchart which showed the flow of the process which the control part 110 performs. The figure which showed an example of the image projected by 10 A of projectors. The figure which showed an example of the image projected by 10 A of projectors. The figure which showed an example of the image projected by the projector 10B. The figure which showed an example of the image projected by projector 10A, 10B. The figure which showed an example of the image projected by projector 10A, 10B.

[Embodiment]
FIG. 1 is a diagram showing an apparatus according to an embodiment of the present invention. The projectors 10A and 10B are examples of a display device that projects an image represented by a video signal supplied from an external device or an image represented by image data acquired from the external device onto a screen or a wall surface. Since the configurations of the projectors 10A and 10B are the same, hereinafter, the projectors 10A and 10B will be referred to as projectors 10 when it is not necessary to distinguish each of the projectors 10A and 10B. The projectors 10A and 10B are used by different users and project different images on the same screen.

(Configuration of projector 10)
FIG. 2 is a diagram illustrating an example of a hardware configuration of the projector 10. In the present embodiment, the basic hardware configuration of the projectors 10A and 10B is the same. Hereinafter, when it is necessary to distinguish each part of the projectors 10A and 10B, for convenience of explanation, “A” is added to the end of the reference numeral of each part of the projector 10A and “B” is added to the end of the reference numeral of each part of the projector 10B. When there is no need to distinguish each part, the description is omitted with the addition of “A” and “B” at the end of the reference numerals.

  The projector 10 includes a control unit 110, a storage unit 120, an operation unit 130, and a projection unit 140. The projector 10 also includes a video processing unit 150, a video interface 160, an imaging unit 170, a communication unit 180, and a light projecting unit 190.

  The control unit 110 is a microcomputer including a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). In the projector 10, when the CPU executes a program stored in the ROM, the control unit 110 controls each unit, and various functions of the projector 10 are realized.

  The storage unit 120 stores settings related to the image quality of the projected image and various function settings. In addition, the storage unit 120 stores priority information indicating which of the image projected by the own device and the image projected by another device is prioritized.

  The operation unit 130 includes a plurality of buttons for operating the projector 10. The control unit 110 controls each unit according to the operated button, thereby adjusting a projected image and setting various functions of the projector 10.

  The communication unit 180 includes a communication interface for wired communication, a communication interface for wireless communication in accordance with the IEEE 802.11 standard, a communication interface for Bluetooth (registered trademark), a communication interface for USB (Universal Serial Bus), and the like. It communicates with other computer devices and other projectors 10 through the interface.

  The video interface 160 has a connector such as RCA, D-Sub, or HDMI (registered trademark), and supplies a video signal supplied from an external device to the connector to the video processing unit 150.

  The video processing unit 150 acquires the video signal supplied from the video interface 160. In addition, the video processing unit 150 acquires an on-screen image signal such as a GUI (Graphical User Interface) or a menu for operating the projector 10 from the control unit 110. The video processing unit 150 has various image processing functions, performs image processing on the video signal supplied from the video interface 160, and adjusts the image quality of the projected image. The video processing unit 150 supplies the video signal whose image quality has been adjusted to the projection unit 140. In addition, when an on-screen image signal is supplied from the control unit 110, the video processing unit 150 supplies a video signal on which the on-screen image signal is superimposed to the projection unit 140.

  The projection unit 140 that projects an image includes a light source 141, a light valve 142, a drive circuit 144, and a projection optical system 143. The light source 141 is a lamp that emits light, and the light emitted from the light source 141 is split into red, green, and blue light by a plurality of dichroic mirrors and mirrors (not shown), and each of the split red, green, and blue is split. Is guided to the light valve 142. The light source 141 may be a light emitting diode or a semiconductor laser device that emits laser light instead of a lamp.

  The drive circuit 144 acquires the video signal supplied from the video processing unit 150. The video signal supplied to the drive circuit 144 includes gradation data representing the gradation of the red component in the image to be projected, gradation data representing the gradation of the green component in the image to be projected, and the blue component in the image to be projected. Gradation data representing the gradations. The drive circuit 144 extracts gradation data of each color of red, green, and blue, and drives the light valve 142 based on the extracted gradation data of each color.

  The light valve 142 includes the above-described liquid crystal light valve on which red light is incident, the above-described liquid crystal light valve on which green light is incident, and the above-described liquid crystal light valve on which blue light is incident. The liquid crystal light valve is a transmissive liquid crystal panel and includes pixels arranged in a matrix with a plurality of rows and a plurality of columns. A liquid crystal light valve that receives red light is driven based on red gradation data, and a liquid crystal light valve that receives green light is driven based on green gradation data, and a liquid crystal light that receives blue light. The valve is driven based on the blue gradation data. In each liquid crystal light valve, each pixel is controlled by the drive circuit 144, and the transmittance of the pixel changes. By controlling the transmittance of the pixels, the light of each color transmitted through the liquid crystal light valve becomes an image corresponding to each gradation data. Red, green, and blue light images transmitted through the liquid crystal light valve are combined by a dichroic prism (not shown) and are incident on the projection optical system 143. The projection optical system 143 is an optical system that magnifies an incident image, and magnifies and projects the incident image with a lens or a mirror.

  The light projecting unit 190 includes a light source and an optical system, and projects invisible light representing an image area projected by the projection unit 140. For example, when the area of the image projected onto the screen by the projection unit 140A is the area A11 shown in FIG. 1, the light projecting unit 190A projects infrared light into the area A11 and the projection unit 140A projects the screen onto the screen. When the area of the projected image is the area A10, infrared light is projected into the area A10. When the region of the image projected by the projection unit 140B is the region B11 shown in FIG. 1, the light projecting unit 190B projects infrared light into the region B11. The light projecting unit 190 projects the region where the infrared light is projected so that the region where the infrared light is projected on the screen matches the region of the image projected on the screen by the projection unit 140. Change in conjunction with the zoom function.

  The imaging unit 170 includes an imaging device (such as a CMOS or CCD) that receives invisible light output from the light projecting unit 190 and reflected by a screen, and an optical system that forms an image on the imaging device. The imaging unit 170 includes an image projected by the projection unit 140, and takes an area wider than an area where the projection unit 140 projects an image as an imaging range. The imaging unit 170 outputs an image obtained by the imaging element to the control unit 110.

  FIG. 3 is a functional block diagram showing a configuration of functions realized by the control unit 110 by executing a ROM program. The determination unit 111 analyzes the image supplied from the imaging unit 170 and determines whether the image projected by the own device and the image projected by the other device overlap. The projection control unit 112 determines an image to be projected in a region where the image projected by the own device and the image projected by the other device overlap according to the determination result of the determination unit 111 so that the determined image is projected. Signals are supplied to the video processing unit 150 and the video processing unit 150 is controlled.

(Operation example of embodiment)
Next, an operation example of this embodiment will be described. In the following description, as shown in FIG. 1, the area of the image projected from the projector 10A onto the screen when the size of the projected image is maximized by the zoom function is the area A10, and the size of the image to be projected. The area of the image projected on the screen from the projector 10A adjusted by the user A is A11, and the area of the image projected on the screen from the projector 10B adjusted by the user B is B10. In addition, according to a setting operation performed in advance by the user, the projector 10A stores priority information indicating that priority is given to an image projected by another device in the storage unit 120A, and the projector 10B prioritizes an image projected by the own device. An example of the operation will be described assuming that priority information indicating this is stored in the storage unit 120B.

  First, the user A of the projector 10A and the user B of the projector 10B operate the projector 10 used by the projector 10A and cause the projector 10 to acquire a projection area of an image projected on the screen. Specifically, the user A operates the operation unit 130A to project infrared light from the light projecting unit 190A, and the user B operates the operation unit 130B to transmit infrared light from the light projecting unit 190B. Stop projecting light. Next, the user A performs an operation for recognizing an image projection area on the screen on the operation unit 130A. When this operation is performed, the control unit 110A controls the imaging unit 170A to cause the imaging unit 170A to perform imaging. The imaging unit 170A captures infrared light projected and reflected in the area A11 of the screen, and supplies an image obtained by the imaging to the control unit 110A. The control unit 110A analyzes the image supplied from the imaging unit 170A, acquires a region in which infrared light is reflected in the supplied image as a region on the screen where the image is projected by the projection unit 140A. The vertex coordinates are stored in the RAM. Here, 110 A of control parts memorize | store the coordinate of the vertex of area | region A11 reflected in the image supplied from 170 A of imaging parts in RAM as a projection area | region of an own apparatus.

  Next, the user B operates the operation unit 130B to project infrared light from the light projecting unit 190B, and the user A operates the operation unit 130A to project infrared light from the light projecting unit 190A. Stop. Then, the user B performs an operation for recognizing the image projection area on the operation unit 130B. When this operation is performed, the control unit 110B controls the imaging unit 170B to cause the imaging unit 170B to perform imaging. The imaging unit 170B images the infrared light that is projected and reflected in the area B11 of the screen, and supplies an image obtained by the imaging to the control unit 110B. The control unit 110B analyzes the image supplied from the imaging unit 170B, acquires a region in which infrared light is reflected in the supplied image as a region on the screen where the image is projected by the projection unit 140B. The vertex coordinates are stored in the RAM. Here, the control unit 110B stores the coordinates of the vertex of the area B11 shown in the image supplied from the imaging unit 170B in the RAM as the projection area of the own apparatus.

  Next, an operation example when the user A uses the projector 10A will be described with reference to the flowchart of FIG. User A connects a personal computer to the video interface 160A, and user B operates the operation unit 130B to stop projecting an image from the projector 10B. The projector 10A acquires a video signal supplied from a personal computer and projects an image represented by the acquired video signal on a screen. In addition, the projector 10A projects infrared light from the light projecting unit 190A.

  The controller 110A controls the imaging unit 170A to cause the imaging unit 170A to perform imaging. The imaging unit 170A images infrared light projected in the area A11 and supplies an image obtained by the imaging to the control unit 110A. 110 A of control parts analyze the image supplied from 170 A of imaging parts, and acquire the coordinate of the vertex of the projection area where the image is projected on a screen (step S1). Here, since only the projector 10A projects an image and infrared light is projected only in the area A11, the control unit 110A acquires the coordinates of the apex of the area A11 shown in the supplied image. Next, the control unit 110A (determination unit 111) determines whether the image projected by the other apparatus overlaps the image projected by the own apparatus (step S2). Specifically, control unit 110A compares the coordinates of the vertex of the projection area acquired in step S1 (the coordinates of the vertex of area A11) with the coordinates of the vertex of the projection area of its own device stored in RAM. Here, the coordinates stored in the RAM are the coordinates of the vertices of the area A11, and coincide with the coordinates acquired in step S1. When the acquired coordinates match the coordinates of the projection area of the own apparatus stored in the RAM, the control unit 110A determines that only the image projected by the own apparatus is projected on the screen, and NO in step S2. to decide.

  If it is determined NO in step S2, control unit 110A (projection control unit 112) controls video processing unit 150A so that the entire area of the image represented by the video signal supplied to video interface 160A is projected (step S1). S3). Thereby, the projection unit 140A projects an image displayed on the personal computer connected to the projector 10A onto the screen as shown in FIG.

  Next, an operation example when the projector 10B is used when the projector 10A is projecting an image will be described. When using the projector 10B, the user B connects a personal computer to the video interface 160B. The projector 10B acquires a video signal supplied from a personal computer and projects an image represented by the acquired video signal on a screen. In addition, the projector 10B projects infrared light from the light projecting unit 190B.

  The control unit 110A analyzes the image supplied from the imaging unit 170A, and periodically acquires the coordinates of the vertex of the projection area of the image projected on the screen. Here, since the projector 10A and the projector 10B project an image, and infrared light is projected onto the area A11 and the area B11 on the screen, the control unit 110A acquires the coordinates of the vertex of the area A11 + the area B11. (Step S1). The coordinates acquired by the control unit 110A are the upper right vertex coordinates of the region A11, the lower right vertex coordinates of the region A11, the lower left vertex coordinates of the region A11, the upper left vertex coordinates of the region B11, and the lower left vertex of the region B11. The coordinates of the projection area of the own device stored in the RAM (the upper right vertex coordinates of the area A11, the lower right vertex coordinates of the area A11, and the upper left corner of the area A11). And the coordinates of the lower left corner of the area A11). In the present embodiment, vertices having an interior angle of less than 180 degrees are extracted from the vertices of the region formed by the region A11 and the region B11. The method for obtaining the vertex is not limited to this, and the coordinates of the intersection of the right side of the region B11 and the upper side of the region A11 and the intersection of the lower side of the region B11 and the left side of the region A11 may be obtained as a vertex. As described above, when the coordinates of the vertices of the acquired area are different from the coordinates of the projection area of the own apparatus, the control unit 110A determines that the coordinates acquired in step S1 are not stored in the RAM (upper left of the area B11). The rectangular area B11 is specified from the vertex coordinates, the lower left vertex coordinates of the area B11, and the upper right vertex coordinates of the area B11. The controller 110A determines whether or not the specified rectangular area overlaps the area A11 specified by the coordinates stored in the RAM. Here, since the area B11 overlaps the area A11, the control unit 110A determines that the image projected by the other apparatus overlaps the image projected by the own apparatus (YES in step S2).

  If it is determined YES in step S2, control unit 110A (projection control unit 112) acquires priority information stored in storage unit 120A (step S4). Here, the content of the priority information stored in the storage unit 120A indicates that priority is given to an image projected by another device. When the content of the acquired priority information indicates that the image projected by the other device has priority (YES in step S5), control unit 110A (projection control unit 112) displays black in the area of the image projected by the other device. An image is projected (step S6). Specifically, the control unit 110A analyzes the image supplied from the imaging unit 170A and specifies the projection area of the image of another device. For example, the control unit 110A calculates a rectangular shape from the coordinates acquired in step S1 that are not stored in the RAM (the upper left vertex coordinate of the region B11, the lower left vertex coordinate of the region B11, the upper right vertex coordinate of the region B11). The area B11 is specified, and an on-screen image signal is supplied to the video processing unit 150A so that a black on-screen image is projected in the specified projection area of the other apparatus.

  On the other hand, the control unit 110B analyzes the image supplied from the imaging unit 170B, and periodically acquires the coordinates of the vertex of the projection area of the image projected on the screen. Here, since the projector 10A and the projector 10B project an image, and infrared light is projected onto the area A11 and the area B11, the control unit 110B also has the coordinates of the vertex of the area A11 and the area B11 reflected in the supplied image. The coordinates of the vertices are acquired (step S1). Here, the coordinates acquired by the control unit 110B are the above-described six coordinates, and the coordinates of the projection area of the own apparatus stored in the RAM (the upper right vertex coordinates of the area B11, the lower right vertex coordinates of the area B11, the area The upper left vertex coordinates of B11 and the lower left vertex coordinates of the region B11). As described above, when the coordinates of the vertex of the acquired area are different from the coordinates of the projection area of the own apparatus, the control unit 110B determines that the coordinates acquired in step S1 are not stored in the RAM (upper right of the area A11). The rectangular area A11 is specified from the vertex coordinates, the lower right vertex coordinates of the area A11, and the lower left vertex coordinates of the area B11. The control unit 110B (determination unit 111) determines whether the specified rectangular area overlaps the area B11 specified by the coordinates stored in the RAM. Here, since the area A11 overlaps the area B11, the control unit 110B determines that the image projected by the other apparatus overlaps the image projected by the own apparatus (YES in step S2).

  If the control unit 110B determines YES in step S2, the control unit 110B acquires the priority information stored in the storage unit 120B (step S4). Here, the content of the priority information stored in the storage unit 120B indicates that the image projected by the own apparatus is prioritized. Control unit 110B (projection control unit 112), when the content of the acquired priority information indicates that the image projected by the own device is prioritized (NO in step S5), the video signal supplied to video interface 160B is The video processing unit 150B is controlled so that the entire area of the image to be represented is projected (step S3).

  FIG. 6 is a diagram illustrating an example of an image projected by the projector 10A by the above-described operation, and FIG. 7 is a diagram illustrating an example of an image projected by the projector 10B by the above-described operation. FIG. 8 is a diagram showing an example of an image projected on the screen by the projectors 10A and 10B by the above-described operation. In FIG. 6, in order to facilitate understanding of the invention, a portion where a black on-screen image is projected is shown by hatching. However, since light from the projector 10A is not actually projected, An image is not projected on the portion.

  As illustrated in FIG. 6, the projector 10 </ b> A projects a black on-screen image on a portion where the region B <b> 11 overlaps. Further, as shown in FIG. 7, the projector 10B projects the image displayed by the connected personal computer onto the area B11. As a result, as shown in FIG. 8, the image of the projector 10 </ b> B is preferentially projected on the screen where the area A <b> 11 and the area B <b> 11 overlap.

  Next, an operation example when the user B stops projecting an image by the projector 10B will be described. When the user B stops the projection of an image by the projector 10B, the user B performs an operation to stop the projection on the operation unit 130B. When this operation is performed, control unit 110B controls projection unit 140B to stop image projection. In addition, the control unit 110B controls the light projecting unit 190B to stop the infrared light projecting.

  The control unit 110A analyzes the video signal supplied from the imaging unit 170A, and periodically acquires the coordinates of the vertex of the projection area of the image projected on the screen. Here, since infrared light is no longer projected onto the area B11 and infrared light is projected only onto the area A11, the control unit 110A acquires only the coordinates of the vertex of the area A11 that appears in the supplied image ( Step S1). Next, the control unit 110A (determination unit 111) determines whether the image projected by the other apparatus overlaps the image projected by the own apparatus (step S2). Here, the coordinates stored in the RAM are the coordinates of the vertices of the area A11 and coincide with the acquired coordinates. When the acquired coordinates coincide with the coordinates of the projection area of the own apparatus stored in the RAM, the control unit 110A determines that only the image projected by the own apparatus is projected on the screen, and NO in step S2. to decide.

  If it is determined NO in step S2, control unit 110A (projection control unit 112) controls video processing unit 150A so that the entire area of the image represented by the video signal supplied to video interface 160A is projected (step S1). S3). Thereby, the projection unit 140A projects an image displayed on the personal computer connected to the projector 10A onto the screen as shown in FIG.

  As described above, according to this embodiment, when an image projected by another projector overlaps an image projected by a projector, the image of one projector is given priority even if the user does not give an instruction to the image. Can be displayed.

[Modification]
As mentioned above, although embodiment of this invention was described, this invention is not limited to embodiment mentioned above, It can implement with another various form. For example, the present invention may be implemented by modifying the above-described embodiment as follows. In addition, you may implement each embodiment mentioned above and the following modifications, combining one or more suitably.

  In the above-described embodiment, it is determined according to the priority information whether the image of the own device or the image of the other device is given priority as an image to be projected onto the overlapping region. Which image has priority? The configuration to be determined is not limited to the configuration of the embodiment. For example, a configuration may be adopted in which an image projected later is preferentially projected.

  In the case of this modification, the control unit 110 of the projector 10 that has projected an image first analyzes the image supplied from the imaging unit 170 and periodically sets the coordinates of the vertex of the projection area of the image projected on the screen. To get. When the coordinates of the vertices of the acquired area are different from the coordinates of the projection area of the own apparatus, the control unit 110A gives priority to the image projected by the other apparatus, and the black on-screen is in the projection area of the image projected by the other apparatus. An on-screen image signal is supplied to the video processing unit 150A so that the image is projected. That is, when it is determined YES in step S2, control unit 110 skips steps S4 and S5 and moves the process flow to step S6. According to this configuration, for example, when the projector 10B starts projecting an image while the projector 10A is projecting an image, the image of the projector 10B is projected with priority as shown in FIG. Thereafter, when the projection of the image by the projector 10A is stopped, only the image of the projector 10B is projected on the screen. When the projection of the image by the projector 10A is resumed, the image of the projector 10A is projected with priority as shown in FIG.

  In the embodiment described above, the light projecting unit 190 is configured to project infrared light, but an external device other than the projector 10 may project infrared light. Further, when the external device projects infrared light, the projector 10 may be configured to project a white on-screen image in the region where the infrared light of the external device is projected. According to this configuration, for example, when infrared light is projected onto the area B11 by an external device, the area where the black rectangle in FIG. 6 is displayed is changed to black and displayed in white. When the projector 10 is projecting an image on a whiteboard, writing can be performed with a marker in a white display area on the whiteboard.

  In the above-described embodiment, the area where the image is projected on the screen is acquired by imaging the light projected by the light projecting unit 190, but the configuration for acquiring the area where the image is projected is implemented. It is not limited to the configuration of the form. For example, the control unit 110 supplies an on-screen image signal to the video processing unit 150 so that an on-screen image having a predetermined pattern is displayed at the apex of the projection region of the image. The control unit 110 specifies the coordinates of the projected on-screen image of a predetermined pattern by analyzing the image supplied from the imaging unit 170, and determines the coordinates of the image projected on the screen by the projection unit 140 from the specified coordinates. Get the coordinates of the region. According to this modification, even in a configuration that does not include the light projecting unit 190, it is possible to preferentially project the image of one projector 10. Further, according to this configuration, for example, even when the area B11 is included in the area A11, the coordinates of the vertex of the area B11 can be specified, and the image of the projector 10B can be projected in the area A11. .

  In the embodiment described above, the case where two projectors 10 project an image is taken as an example. However, even when three or more projectors 10 project an image, the operations and priority information in the projectors 10A and 10B described above are used. By performing this setting, it is possible to preferentially project the image of any projector 10.

  In the present invention, the wavelength of the light projected by the light projecting unit 190 is different for each of the plurality of projectors 10, and the projector 10 projects the light projected by the light projecting unit 190 of its own device and the light projected by another device. It is good also as a structure which can distinguish the light which the part 190 projected.

  DESCRIPTION OF SYMBOLS 10, 10A, 10B ... Projector, 110 ... Control part, 111 ... Determination part, 112 ... Projection control part, 120 ... Memory | storage part, 130 ... Operation part, 140 ... Projection part, 141 ... Light source, 142 ... Light valve, 143 ... Projection optical system, 144... Drive circuit, 150... Image processing unit, 160... Image interface, 170.

Claims (10)

A projection unit that projects the first image onto the projection surface;
A determination unit that determines an overlap between the region of the first image projected onto the projection plane by the projection unit and the region of the second image projected onto the projection plane by another device;
Projection for determining an image to be projected in an overlapping area where the first image and the second image overlap according to a determination result of the determination unit, and controlling the projection unit so that the determined image is projected in the overlapping area A projector comprising a control unit. The projection control unit controls the projection unit so that, when the second image is projected onto the projection plane after the first image, an image of a portion included in the overlapping area in the first image is not projected. The projector according to claim 1. A storage unit for storing priority information indicating the priority of the first image and the second image;
The projector according to claim 1, wherein when the determination result indicates that the first image and the second image overlap each other, the projection control unit determines an image to be projected on the overlapping area according to the priority information. . When an image from another projector is projected on the overlapping area, the projection control unit determines an image to be projected on the overlapping area according to a determination result of the determining unit, and the determined image is the overlapping area. The projector according to claim 1, wherein the projection unit is controlled to be projected onto the projector. The projection control unit, when an image from another projector that has been projected to the overlapping area is no longer projected to the overlapping area, an image of a portion included in the overlapping area in the first image is displayed in the overlapping area. The projector according to claim 4, wherein the projection unit is controlled to be projected. The projection control unit controls the projection unit such that when the second image projected on the projection plane is an image projected by another projector, a black image is projected on the overlapping area. Item 14. The projector according to Item 1. The projector according to claim 1, wherein the projection control unit controls the projection unit so that a white image is projected onto the overlapping region. A light projecting unit that projects light representing the region of the first image onto the projection surface;
The determination unit detects light projected onto the projection surface by the light projecting unit and light projected onto the projection surface by the other device, and determines the area of the first image according to a detection result. The projector according to any one of claims 1 to 7, wherein an overlap of the areas of the second image is determined. The projector according to claim 8, wherein the light projecting unit projects light onto a region where the first image is projected on the projection surface. A method of controlling a projector having a projection unit that projects a first image onto a projection surface,
A determination step of determining an overlap between a region of the first image projected onto the projection plane by the projection unit and a region of the second image projected onto the projection plane by another device;
An image for controlling the projection unit to determine an image to be projected on an overlapping area where the first image and the second image overlap according to the determination result of the determination step, and to project the determined image on the overlapping area A projector control method comprising: a control step.

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