IMAGE DISPLAY DEVICE AND METHOD OF CHANGING EDID INFORMATION THEREOF

• US 20090058868A1
• Filed: 02/05/2008
• Published: 03/05/2009
• Est. Priority Date: 09/03/2007
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Il-doo, KANG, Ho-woong
• Granted Patent: US 8,069,276 B2
• Time in Patent Office: Days
• US Class Current: 345/581
• CPC Class Codes: G09G 2320/08 Arrangements within a display terminal for setting, manually or automatically, display parameters of the display terminal
• CPC Class Codes: G09G 2370/047 using display data channel standard [DDC] communication
• CPC Class Codes: G09G 5/006 Details of the interface to the display terminal specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04

Abstract

An image display device and method of changing extended display identification data (EDID) information includes a first storage unit which stores extended display identification data (EDID) information to be provided to the source providing device, a second storage unit which stores at least one version of the EDID information which is different from the EDID information stored in the first storage unit, and a control unit which replaces the EDID information stored in the first storage unit with the different version of the EDID information stored in the second storage unit if an EDID information change request signal is input. Accordingly, compatibility of the EDID information between the source providing device and the image display device can be maintained.

Claims

1. An image display device which is connectable to a source providing device, the image display device comprising:

a first storage unit which stores extended display identification data (EDID) information to be provided to the source providing device;

a second storage unit which stores at least one version of the EDID information which is different from the EDID information stored in the first storage unit; and

a control unit which replaces the EDID information stored in the first storage unit with the different version of the EDID information stored in the second storage unit if an EDID information change request signal is input.

2. The image display device of claim 1, further comprising:

an interface unit which supports interfacing between the image display device and the source providing device; and

a switch unit which switches a connection between the interface unit and the first storage unit.

3. The image display device of claim 2, wherein the switch unit disconnects the interface unit from the first storage unit and connects the control unit to the first storage unit if the EDID information change request signal is input.

4. The image display device of claim 3, wherein the switch unit disconnects the control unit to the first storage unit and reconnects the interface unit to the first storage unit if the EDID information stored in the first storage unit is replaced with the different version of the EDID information stored in the second storage unit.

5. The image display device of claim 1, further comprising:

a user interface unit which provides a list of the at least one EDID information stored in the second storage unit so that a user can select one from the list, and receives the EDID information change request signal.

6. The image display device of claim 5, wherein:

the user interface unit provides an EDID information edition menu so that the user can edit the EDID information; and

the control unit stores the EDID information edited using the EDID information edition menu in the first storage unit.

7. The image display device of claim 1, further comprising:

an external communication interface unit which receives a new version of the EDID information through an external communication medium,

wherein the control unit stores the new version of EDID information received through an external communication interface unit in the second storage unit.

8. The image display device of claim 1, further comprising:

a tuner unit which receives a new version of the EDID information in Over the Air (OTA) manner,

wherein the control unit stores the new version of EDID information received through the tuner unit in the second storage unit.

9. The image display device of claim 1, wherein if the EDID information stored in the first storage unit is replaced with the different version of the EDID information stored in the second storage unit, and an error occurs in the replaced EDID information, the control unit restores the replaced EDID information to the previous EDID information.

10. A method of changing extended display identification data (EDID) information in an image display device, the method comprising:

receiving an EDID information change request signal; and

replacing EDID information stored in a first storage unit with a different version of the EDID information stored in a second storage according to the EDID information change request signal.

11. The method of claim 10, further comprising:

disconnecting the source providing device from the first storage unit if the EDID information change request signal is input.

12. The method of claim 11, further comprising:

reconnecting the source providing device to the first storage unit.

13. The method of claim 10, further comprising:

providing a list of the at least one EDID information stored in the second storage unit so that a user selects one from the list.

14. The method of claim 10, further comprising:

providing an EDID information edition menu so that a user edits the EDID information; and

storing the edited EDID information in the first storage unit.

15. The method of claim 10, further comprising:

receiving a new version of the EDID information through an external communication medium; and

storing the received new version of EDID information in the second storage unit.

16. The method of claim 10, further comprising:

receiving a new version of the EDID information in Over the Air (OTA) manner; and

storing the received new version of EDID information in the second storage unit.

17. The method of claim 10, further comprising:

if the EDID information stored in the first storage unit is replaced with the different version of the EDID information stored in the second storage unit and the replaced EDID information includes an error, restoring the replaced EDID to the previous EDID information.

18. A computer-readable medium to contain computer-readable codes as a program to execute a method of an image display device, the method comprising:

receiving an EDID information change request signal; and

replacing EDID information stored in a first storage unit with a different version of the EDID information stored in a second storage according to the EDID information change request signal.

19. An image display device comprising:

a first storage unit to store first EDID information;

a second storage unit to store second EDID information; and

a control unit to control the first storage unit to replace the first EDID information with the second EDID information.

20. The image display device of claim 19, wherein:

the first storage unit is connectable to a first external device and transmits one or the first EDID information and the second EDID information to the first external device; and

the second storage unit is connectable to a second external device and receives the second EDID information from the second external device.

21. The image display device of claim 20, wherein the first external device comprises a source providing device to provide a source to be reproduced in the image display device.

22. The image display device of claim 20, wherein the second external device provides one of a new version and an edited version of the first EDID information to the second storage device as the second EDID information.

23. The image display device of claim 19, wherein the first storage unit is connectable to an external device to transmit the first EDID information to the external device, and is disconnected from the external device and connected to the second storage unit to receive the second EDID information from the first storage unit such that the received second EDID information is transmitted to the external device as the first EDID information when the first storage unit is connected to an external device.

24. The image display device of claim 19, wherein the control unit is connected to the second storage unit when the second EDID information is different from the first EDID information, and is connected to the first storage unit to update the first EDID information with the second EDID information.

25. The image display device of claim 19, wherein the second storage unit stores a list of different EDID information, and the control units controls the second storage unit to output one of the list of different EDID information as the second EDID information.

26. The image display device of claim 19, further comprising:

a switch unit to selectively connect one of the first storage unit and the second storage unit to the control unit such that the second EDID information is transmitted from the second storage unit to the first storage unit.

27. The image display device of claim 19, further comprising:

a first power unit to supply a first power to the first storage unit; and

a second power unit to supply a second power to the second storage unit,

wherein the first storage unit is supplied with the first power when the second storage unit is not supplied with the second power in one of a power off mode and a power saving mode.