Image display system

Abstract

An image display system comprising an image supply device, a projector, and a network for connecting the image supply device and the projector, and when images are supplied to the projector via the network from the image supply device, the images are projected by the projector. When projecting and displaying a second image having a second image size based on a first image having a first image size in a projection screen of the projector, the image supply device generates supplied image data including first image data for representing the first image, position data for indicating the display position of the second image in the projection screen, and second image size data for indicating the second image size, and also supplies this to the projector via the network. By doing this, an increase in network traffic is suppressed for the image display system noted above.

1 . An image supply device capable of supplying images to a projector via a network, in case of projecting and displaying a second image having a second image size based on a first image having a first image size in the projection screen of the projector, the image supply device generating supplied image data including first image data representing the first image, position data indicating the display position of the second image in the projection screen, and second image size data indicating the second image size, and supplying the supplied image data to the projector via the network.  
   
   
       2 . The image supply device in accordance with  claim 1 , wherein the supplied image data are further included in first image size data indicating the first image size.  
   
   
       3 . The image supply device in accordance with  claim 1 , wherein the supplied image data are further data indicating whether the second image size is an equivalent size or an expanded/reduced size in relation to the first image size.  
   
   
       4 . A projector capable of receiving supply of images from an image supply device via a network, in case of projecting and displaying a second image having a second image size based on a first image having a first image size in a projection screen of the projector, when supplied image data including first image data representing the first image, position data indicating the display position of the second image in the projection screen, and second image size data indicating the second image size is supplied from the image supply device to the projector via the network, the projector generating second image data representing the second image based on the first image data and the second image size data included in the supplied image data, and projecting the second image in the projection screen based on the generated second image data and the position data included in the supplied image data.  
   
   
       5 . The projector in accordance with  claim 4 , wherein the supplied image data are further included in first image size data indicating the first image size.  
   
   
       6 . The projector in accordance with  claim 4 , wherein the supplied image data are further data indicating whether the second image size is an equivalent size or an expanded/reduced size in relation to the first image size.  
   
   
       7 . An image display system comprising an image supply device, a projector, and a network for connecting the image supply device and the projector, supplying images from the image supply device to the projector via the network, and projecting and displaying the images by way of the projector, 
 wherein the image supply device, in case of projecting and displaying a second image having a second image size based on a first image having a first image size in the projection screen of the projector, generates supplied image data including first image data for representing the first image, position data indicating the display position of the second image in the projection screen, and second image size data indicating the second image size, and supplies the supplied image data to the projector via the network.    
   
   
       8 . The image display system in accordance with  claim 7 , wherein the projector generates second image data representing the second image based on the first image data and the second image size data included in the supplied image data, and projects the second image in the projection screen based on the generated second image data and the position data included in the supplied image data.  
   
   
       9 . An image supply method of supplying images to a projector via a network, the image supply method comprising the steps of: 
 (a) in case of projecting and displaying a second image having a second image size based on a first image having a first image size in a projection screen of the projector, generating supplied image data including first image data representing the first image, position data indicating the display position of the second image in the projection screen, and second image size data indicating the second image size; and    (b) supplying the supplied image data to the projector via the network.    
   
   
       10 . An image display method of displaying the images supplied to a projector via a network by way of the projector, the image display method comprising the steps of 
 (a) in case of projecting and displaying a second image having a second image size based on a first image having a first image size in a projection screen of the projector, when supplied image data including first image data for representing the first image, position data indicating the display position of the second image in the projection screen, and second image size data indicating the second image size are supplied to projector via the network, generating second image data representing the second image based on the first image data and the second image size data included in the supplied image data; and    (b) projecting the second image in the projection screen based on the second image data and the position data included in the supplied image data by way of the projector.    
   
   
       11 . A computer program product of supplying images to a projector via a network by way of a computer, the computer program product comprising: 
 a first program code that, in case of projecting and displaying a second image having a second image size based on a first image having a first image size in a projection screen of the projector, generates supplied image data including first image data representing the first image, position data indicating the display position of the second image in the projection screen, and second image size data indicating the second image size;    a second program code that supplies the supplied image data to the projector via the network; and    a computer readable medium for storing the program codes.    
   
   
       12 . A computer program product used for a computer incorporated in a projector capable of receiving supply of images from an image supply device via a network, the computer program product comprising: 
 a first program code that, in case of projecting and displaying a second image having a second image size based on a first image having a first image size in a projection screen of the projector, when supplied image data including first image data representing the first image, position data indicating the display position of the second image in the projection screen, and second image size data indicating the second image size are supplied from the image supply device via the network, generates second image data representing the second image based on the first image data and the second image size data included in the supplied image data;    a second program code that projects the second image in the projection screen based on the generated second image data and the position data included in the supplied image data; and    a computer readable medium for storing the program code.