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

• US 8,793,771 B2
• Filed: 06/22/2012
• Issued: 07/29/2014
• 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:
  US13/531,048
• Publication Number:
  US 20120274865A1
• Time in Patent Office: 767 Days
• Field of Search: 709204-207, 726/4, 713/169
• US Class Current: 726/4
• 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 projector comprising:

a projection controller;

a communication control unit configured to connect to a network;

a password-checkup section; and

a stored program directing the following operations;

the projection controller to visibly project an image, which is a combination of a password image of a first password and another image of a portion of presentation data,

the communication control unit to receive a second password from a computer connected to the network, and

the password-checkup section to determine if the second password matches the first password, wherein

if the received second password from the computer matches the first password, the stored program directs the communication control unit of the projector to transmit the presentation data that was in the projected image to the computer;

wherein the projection controller, the password-checkup section, and the communication control unit are executed by a processor of the projector.

2. The projector according to claim 1, wherein the stored program of the projector directs the password-checkup section to extract the first password from the combined password image and the image of the portion of presentation.

3. A method of controlling a projector comprising the steps of:

receiving presentation data from a computer of a presenter;

visibly projecting a password image of a first password combined with an image of a portion of the presentation data;

determining whether a second password sent from a client computer matches the first password;

transmitting the presentation that was projected with the password image to the client computer when it is determined that second password sent from the client computer matches the first password.

4. The method according to claim 3, further comprising the steps of:

receiving delivery permission data before receiving the presentation data; and

determining whether the delivery permission data indicates that delivery of the presentation data is permissible,

wherein, when the delivery permission data indicates that delivery of the presentation data is permissible, the projector visibly projects the password image combined with the image of the portion of the presentation.

5. The method according to claim 3, further comprising the steps of:

receiving delivery permission data before receiving the presentation data; and

determining whether the delivery permission data indicates that delivery of the presentation data is permissible or prohibited,

wherein, when the delivery permission data indicates that delivery of the image data is prohibited;

the projector does not visibly project the password image combined with the image of the portion of the presentation data.

6. The method according to claim 3, further comprising:

extracting the first password from the combined password image and the other image of the portion of presentation data.