Projection device and control method therefor

Abstract

When each of a plurality of projection devices projects an image on a screen, in order to easily determine whether or not an association between identification information of each of the plurality of projection devices and positional relationship of each of the plurality of projection devices is correct, an image for notifying of an association between a predetermined area included in a display pattern and an external projection device is projected, and a communication unit of a projection device transmits information related to the association between the predetermined area included in the display pattern and the external projection device, which is inputted by an input unit, to the external projection device.

What is claimed is: 
     
         1 . A method for displaying a combined image by displaying a plurality of images by a plurality of display apparatuses,
 wherein one of the plurality of display apparatuses communicates with another of the plurality of display apparatuses,   wherein the one display apparatus displays an image for indicating a positional relationship between the plurality of images to be displayed by the plurality of display apparatuses, and   wherein the another display apparatus displays information for notifying an area of an image to be displayed by the another display apparatus.   
     
     
         2 . The method according to  claim 1 , wherein
 the another display apparatus displays, by the communication between the one display apparatus and the another display apparatus, information for notifying a position of the area of the image to be displayed by the another display apparatus in the combined image.   
     
     
         3 . The method according to  claim 1 , wherein
 the one display apparatus displays a setting image for setting a plurality of areas of the plurality of images to be displayed by the plurality of display apparatuses in the combined image.   
     
     
         4 . The method according to  claim 3 , wherein
 the one display apparatus displays an image related to information for identifying positions of the plurality of areas.   
     
     
         5 . The method according to  claim 3 , wherein
 the one display apparatus displays a plurality of area images corresponding to the plurality of areas.   
     
     
         6 . The method according to  claim 5 , wherein
 the one display apparatus displays information for identifying the plurality of areas, on the plurality of area images.   
     
     
         7 . The method according to  claim 1 , wherein
 the one display apparatus displays an image including identification information for the plurality of display apparatuses and information indicating areas of the plurality of images to be displayed by the plurality of display apparatuses in the combined image.   
     
     
         8 . The method according to  claim 7 , wherein
 the identification information is an IP address.   
     
     
         9 . The method according to  claim 7 , wherein
 the one display apparatus communicates with the another display apparatus based on setting done by using the image.   
     
     
         10 . The method according to  claim 1 , wherein
 the one display apparatus communicates with the another display apparatus through a wireless LAN.   
     
     
         11 . The method according to  claim 1 , wherein
 the plurality of display apparatuses is a plurality of projectors.   
     
     
         12 . A display apparatus used for displaying a combined image by combining a plurality of images displayed by a plurality of display apparatuses comprising:
 at least one CPU; and   at least one memory storing a program which, when executed by the at least one CPU, causes the display apparatus to:   display an image for indicating a positional relationship between the plurality of areas;   communicate with another of the plurality of display apparatuses;   control the communication with the another display apparatus so that the another display apparatus displays information for notifying an area of an image to be displayed by the another display apparatus in the combined image.   
     
     
         13 . The display apparatus according to  claim 12 , wherein
 the program, when executed by the at least one CPU, further causes the display apparatus to control the communication with the another display apparatus so that the another display apparatus displays information for notifying a position of the area of the image to be displayed by the another display apparatus in the combined image.   
     
     
         14 . The display apparatus according to  claim 12 , wherein
 the program, when executed by the at least one CPU, further causes the display apparatus to display a setting image for setting a plurality of areas of the plurality of images to be displayed by the plurality of display apparatuses.   
     
     
         15 . The display apparatus according to  claim 14 , wherein
 the setting image includes an image related to information for identifying positions of the plurality of areas.   
     
     
         16 . The display apparatus according to  claim 14 , wherein
 the program, when executed by the at least one CPU, further causes the display apparatus to display a plurality of area images corresponding to the plurality of areas.   
     
     
         17 . The display apparatus according to  claim 16 , wherein
 the program, when executed by the at least one CPU, further causes the display apparatus to display information for identifying the plurality of areas on the plurality of area images.   
     
     
         18 . The display apparatus according to  claim 12 , wherein
 the program, when executed by the at least one CPU, further causes the display apparatus to display an image including identification information for the plurality of display apparatuses and information indicating areas of the plurality of images to be displayed by the plurality of display apparatuses in the combined image.   
     
     
         19 . The display apparatus according to  claim 18 , wherein
 the identification information is inputted by user operation.   
     
     
         20 . The display apparatus according to  claim 18 , wherein
 the identification information is an IP address.   
     
     
         21 . The display apparatus according to  claim 12 , wherein
 the program, when executed by the at least one CPU, further causes the display apparatus to perform control to display information about an area of an image to be displayed by the display apparatus in the combined image.   
     
     
         22 . The display apparatus according to  claim 12 , wherein
 the plurality of display apparatuses is a plurality of projectors,   the program, when executed by the at least one CPU, further causes the display apparatus to project an image.   
     
     
         23 . A method for displaying a combined image by displaying a plurality of images by a plurality of display apparatuses,
 wherein one of the plurality of display apparatuses communicates with another of the plurality of display apparatuses, and   wherein the another display apparatus displays, by the communication between the one display apparatus and the another display apparatus, information for notifying an area of an image to be displayed by the another display apparatus in the combined image.   
     
     
         24 . The method according to  claim 23 , wherein
 the another display apparatus displays, by the communication between the one display apparatus and the another display apparatus, information for notifying a position of the area of the image to be displayed by the another display apparatus in the combined image.   
     
     
         25 . The method according to  claim 23 , wherein
 the one display apparatus displays a setting image for setting a plurality of areas of the plurality of images to be displayed by the plurality of display apparatuses in the combined image.   
     
     
         26 . The method according to  claim 25 , wherein
 the setting image includes an image related to information for identifying positions of the plurality of areas.   
     
     
         27 . The method according to  claim 23 , wherein
 the one display apparatus displays a pattern image for indicating a positional relationship between the plurality of areas.   
     
     
         28 . The method according to  claim 27 , wherein
 the one display apparatus displays information for identifying the plurality of areas on positions corresponding to the plurality of areas in the pattern image.   
     
     
         29 . The method according to  claim 23 , wherein
 the one display apparatus displays an image including identification information for the plurality of display apparatuses and information indicating areas of the plurality of images to be displayed by the plurality of display apparatuses in the combined image.   
     
     
         30 . The method according to  claim 29 , wherein
 the identification information is inputted by user operation.   
     
     
         31 . The method according to  claim 29 , wherein
 the identification information is an IP address.   
     
     
         32 . The method according to  claim 25 , wherein
 the communication is performed based on setting done by using the setting image.   
     
     
         33 . The method according to  claim 23 , wherein
 the communication is performed through a wireless LAN.   
     
     
         34 . The method according to  claim 23 , wherein
 the plurality of display apparatuses is a plurality of projectors.   
     
     
         35 . A display apparatus used for displaying a combined image by combining a plurality of images displayed by a plurality of display apparatuses comprising:
 at least one CPU; and   at least one memory storing a program which, when executed by the at least one CPU, causes the display apparatus to:   communicate with another of the plurality of display apparatuses;   control the communication with the another display apparatus so that the another display apparatus displays information for notifying an area of an image to be displayed by the another display apparatus in the combined image.   
     
     
         36 . The display apparatus according to  claim 35 , wherein
 the program, when executed by the at least one CPU, further causes the display apparatus to control the communication with the another display apparatus so that the another display apparatus displays information for notifying a position of the area of the image to be displayed by the another display apparatus in the combined image.   
     
     
         37 . The display apparatus according to  claim 35 , wherein
 the program, when executed by the at least one CPU, further causes the display apparatus to display a setting image for setting a plurality of areas of the plurality of images to be displayed by the plurality of display apparatuses.   
     
     
         38 . The display apparatus according to  claim 37 , wherein
 the setting image includes an image related to information for identifying positions of the plurality of areas.   
     
     
         39 . The display apparatus according to  claim 35 , wherein
 the program, when executed by the at least one CPU, further causes the display apparatus to display a pattern image for indicating a positional relationship between the areas corresponding to the plurality of display apparatuses.   
     
     
         40 . The display apparatus according to  claim 39 , wherein
 the program, when executed by the at least one CPU, further causes the display apparatus to display information for identifying the plurality of areas on positions corresponding to the plurality of areas in the pattern image.   
     
     
         41 . The display apparatus according to  claim 35 , wherein
 the program, when executed by the at least one CPU, further causes the display apparatus to display an image including identification information for the plurality of display apparatuses and information indicating areas of the plurality of images to be displayed by the plurality of display apparatuses in the combined image.   
     
     
         42 . The display apparatus according to  claim 41 , wherein
 the identification information is inputted by user operation.   
     
     
         43 . The display apparatus according to  claim 41 , wherein
 the identification information is an IP address.   
     
     
         44 . The display apparatus according to  claim 37 , wherein
 the communication is performed based on setting done by using the setting image.   
     
     
         45 . The display apparatus according to  claim 35 , wherein
 the program, when executed by the at least one CPU, further causes the display apparatus to perform control to display information about an area of an image to be displayed by the display apparatus in the combined image.   
     
     
         46 . The display apparatus according to  claim 35 , wherein
 the plurality of display apparatuses is a plurality of projectors,   the program, when executed by the at least one CPU, further causes the display apparatus to project an image.