IMAGE-DISPLAY METHOD, PROJECTOR, IMAGE-DISPLAY SYSTEM, PROJECTOR-CONTROL METHOD, IMAGE-DISPLAY PROGRAM, AND PROJECTOR-CONTROL PROGRAM

• US 20090284667A1
• Filed: 06/29/2009
• Published: 11/19/2009
• 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, Karasawa, Toru, Kubota, Shinji
• Granted Patent: US 8,230,000 B2
• Time in Patent Office: Days
• US Class Current: 348/744
• 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. An image projection system for use with a network, comprising:

a projector for projecting a first image based on inputted image data, the projector including;

a projection controller that controls a projection of the first image produced by adding a password image to a second image corresponding to the image data;

a communication control unit of the projector; and

a password-checkup section that determines whether a password received from the computer is correct; and

the computer including;

a communication control unit of the computer that communicates with the projector via the network;

a displaying unit; and

an input device,

wherein the communication control unit of the computer sends a password inputted by the input device to the projector,

wherein, if the password-checkup section determines that the received password sent from the computer is correct, the communication control unit of the projector transmits the image data to the computer that sent the correct password such that the communication control unit of the computer receives the transmitted image data from the projector and the displaying unit displays the second image corresponding to the transmitted image data, and

wherein the communication control unit of the projector communicates with the computer via the network.

6. The image projection system of claim 1, wherein the image data can be designated as delivery-permitted data for delivery to the computer or as delivery-prohibited data for withholding from and not delivering to the computer.

2. A projector for projecting an image represented by image data inputted therein, comprising:

a projection controller that controls a projection of the image produced by adding a password image on the image data;

a communication control unit of the projector that communicates with a computer via a network; and

a password-checkup section that determines whether a password received from the computer is correct,

wherein, if the password-checkup section determines that the received password from the computer is correct, the communication control unit of the projector transmits the image data to the computer that sent the correct password.

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

receiving image data from a computer of a presenter;

projecting a password image with an image corresponding to the image data;

determining a correctness of a password sent from a client computer;

transmitting the image data to the client computer when it is determined that the client computer sent the correct password.

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

receiving delivery permission data before receiving the image data; and

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

wherein, when the delivery permission data indicates that delivery of the image data is permissible, the projector projects a password image with an image corresponding to the received image data.

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

receiving delivery permission data before receiving the image data; and

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

wherein, when the delivery permission data indicates that delivery of the image data is prohibited, the projector does not project a password image with an image corresponding to the received image data.