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

• US 9,305,188 B2
• Filed: 06/13/2014
• Issued: 04/05/2016
• Est. Priority Date: 03/24/2003
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Sato, Minoru, Kubota, Shinji, Karasawa, Toru
• Primary Examiner(s): HOANG, HIEU T
• Application Number:
  US14/304,036
• Publication Number:
  US 20140298425A1
• Time in Patent Office: 662 Days
• Field of Search: 709/202, 726/4, 713/169
• US Class Current: 1/1
• CPC Class Codes: G06F 21/606 by securing the transmission between two devices or processes
• CPC Class Codes: G06F 21/82 Protecting input, output or interconnection devices
• CPC Class Codes: G06F 21/84 output devices, e.g. displays or monitors
• CPC Class Codes: G06F 3/1431 using a single graphics controller
• CPC Class Codes: H04N 21/25875 involving end-user authentication restricting access to computer systems by authenticating users using a predetermined code G06F21/33; arrangements for secret or secure communication including means for verifying the identity or authority of a user of the system H04L9/32; networks authentication protocols H04L63/08; authentication in wireless network security H04W12/06
• CPC Class Codes: H04N 21/4122 additional display device, e.g. video projector digital output for controlling a plurality of local displays G06F3/1423
• CPC Class Codes: H04N 21/4143 embedded in a Personal Computer [PC]
• CPC Class Codes: H04N 21/43632 involving a wired protocol, e.g. IEEE 1394 high-speed IEEE 1394 serial bus H04L12/40052
• CPC Class Codes: H04N 21/4753 for user identification, e.g. by entering a PIN or password cryptographic authentication protocols H04L9/32; networks authentication protocols H04L63/08
• CPC Class Codes: H04N 7/17318 Direct or substantially direct transmission and handling of requests

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.

Claims

1. A method of controlling a projector that displays an image based on image data, the method comprising the steps of:

storing a first password in a memory in the projector;

receiving via a controller of the projector a second password sent from a computer;

determining via the controller of the projector whether the second password sent from the computer matches the first password;

transmitting via the controller of the projector the image data from the projector to the computer when it is determined that the second password sent from the computer matches the first password;

receiving delivery permission data via the controller of the projector;

determining via the controller of the projector whether the delivery permission data indicates that delivery of the image data is permissible; and

when the delivery permission data indicates that delivery of the image data is permissible, the controller of the projector visibly projects a password image of the first password combined with the image of the image data.

2. The method according to claim 1, further comprising the steps of:

receiving via the controller of the projector the image data from a computer of a presenter.

3. The method according to claim 1, wherein when the delivery permission data indicates that delivery of the image data is prohibited, the controller of the projector does not visibly project the password image combined with the image of the image data.

4. The method according to claim 1, further comprising:

extracting via the controller of the projector the first password from a combined password image and another image of the image data.

5. A projector that displays an image based on image data, the projector comprising:

a memory that stores a first password; and

a controller that is programmed to;

receive a second password sent from a computer;

determine whether the second password sent from the computer matches the first password;

transmit the image data from the projector to the computer when it is determined that the second password sent from the computer matches the first password;

receive delivery permission data;

determine whether the delivery permission data indicates that delivery of the image data is permissible; and

when the delivery permission data indicates that delivery of the image data is permissible, the controller visibly projects a password image of the first password combined with the image of the image data.

6. The projector according to claim 5, wherein the controller is further programmed to receive the image data from a computer of a presenter.

7. The projector according to claim 5, wherein when the delivery permission data indicates that delivery of the image data is prohibited, the controller does not visibly project the password image combined with the image of the image data.

8. The projector according to claim 5, wherein the controller is further programmed to extract the first password from a combined password image and another image of the image data.