Image-display method, projector, image-display system, projector-control method, image-display program, and projector-control program

Abstract

With a conventional image-display system, a presenter sometimes has difficulty in providing every viewer with an easy-to-see picture. When projecting an image transmitted from a computer operated by the presenter and enabling the viewer to watch the image projected by the projector, the projector receives image data transmitted through two-way communication from the computer operated by the presenter, projects an image represented by the received image data and transmits the received image data to a client computer operated by the viewer through the two-way communication, and the client computer receives the image data transmitted through the two-way communication and displays the image represented by the received image data on its display.

What is claimed is:  
     
         1 . An image-display method of projecting an image transmitted from a computer operated by a presenter on a screen by a projector and enabling a viewer to watch the image projected by the projector, 
 wherein the projector receives image data transmitted from the computer operated by the presenter through two-way communication, projects the image represented by the received image data, and transmits the received image data to a client computer operated by the viewer through the two-way communication, and    wherein the client computer receives the transmitted image data through the two-way communication and displays the image represented by the received image data on its display.    
     
     
         2 . The image-display method according to  claim 1 , wherein the projector receives data indicating permission or prohibition of delivery of the image data transmitted from the computer operated by the presenter through the two-way communication and transmits the image data to the client computer when receiving delivery-permitting data for the image data.  
     
     
         3 . The image-display method according to  claim 2 , wherein the client computer demands connection to the projector and the projector permits the client computer to connect to itself and sends on the image data when receiving the delivery-permitting data for the image data.  
     
     
         4 . The image-display method according to  claim 3;   wherein the client computer accepts a password visible to only the viewer of the image projected on the screen by the projector and sends the accepted password when demanding the connection to the projector, and    wherein the projector receives the password sent from the client computer to find if the password is correct and sends the image data when the password is found correct.    
     
     
         5 . The image-display method according to  claim 1 , wherein the projector transmits the received image data just as they are to the client computer and wherein the client computer decompresses the image data by using the same algorithm as the projector and displays the image on its display.  
     
     
         6 . A projector projecting an image transmitted from a computer operated by a presenter and enabling a viewer to watch the projected image, the projector comprising: 
 a communication-control unit of the projector conducting two-way communication with external computers;    an image data-receiving unit of the projector receiving image data transmitted from the computer operated by the presenter through the communication-control unit of the projector;    an image-projecting unit projecting an image represented by the received image data; and    an image data-transmitting unit transmitting the image data received through the communication-control unit of the projector to a client computer operated by the viewer.    
     
     
         7 . An image-display system capable of having a projector project an image transmitted from a computer operated by a presenter and enabling a viewer to watch the image projected by the projector: 
 wherein the projector comprises    a communication-control unit of the projector conducting two-way communication with external computers,    an image data-receiving unit of the projector receiving image data transmitted from the computer operated by the presenter through the communication-control unit of the projector,    an image-projecting unit projecting an image represented by the received image data, and    an image data-transmitting unit transmitting the image data received through the communication-control unit of the projector to a client computer operated by the viewer; and    wherein the client computer comprises    a communication-control unit of the client computer conducting two-way communication with the projector,    an image data-receiving unit of the client computer receiving the image data transmitted through the communication-control unit of the client computer, and    an image-displaying unit displaying the image represented by the received image data on its display.    
     
     
         8 . A projector-control method of projecting an image transmitted from a computer operated by a presenter and enabling a viewer to watch the projected image; 
 wherein image data transmitted from the computer operated by the presenter are received through two-way communication, an image represented by the received image data is projected, and the received image data are transmitted through the two-way communication to a client computer operated by the viewer.    
     
     
         9 . An image-display program capable of having a projector project an image transmitted from a computer operated by a presenter and enabling a viewer to watch the image projected by the projector: 
 wherein the projector is provided with    a communication-control function of the projector conducting two-way communication with external computers,    an image data-receiving function of the projector receiving image data transmitted from the computer operated by the presenter through the communication-control function of the projector,    an image-projecting function projecting an image represented by the received image data, and    an image data-transmitting function transmitting the image data received through the communication-control function of the projector to a client computer operated by the viewer; and    wherein the client computer is provided with    a communication-control function of the client computer conducting two-way communication with the projector,    an image data-receiving function of the client computer receiving the image data transmitted through the communication-control function of the client computer, and    an image-displaying function displaying the image represented by the received image data on the display.    
     
     
         10 . A projector-control program projecting an image transmitted from a computer operated by a presenter and enabling a viewer to watch the projected images, the projector-control program providing a control computer of a projector with; 
 a communication-control function of the projector conducting two-way communication with external computers,    an image data-receiving function of the projector receiving image data transmitted from the computer operated by the presenter through the communication-control function of the projector,    an image-projecting function projecting an image represented by the received image data, and    an image data-transmitting function transmitting the image data received through the communication-control function of the projector to a client computer operated by the viewer.