System and method for automatically resetting a display information if optionally changed display information is not suitable for extended display information data (EDID) of a monitor

• US 7,366,886 B2
• Filed: 04/14/2004
• Issued: 04/29/2008
• Est. Priority Date: 06/02/2003
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Yoo, Chang-woong
• Primary Examiner(s): SURYAWANSHI, SURESH
• Application Number:
  US10/823,704
• Publication Number:
  US 20040239676A1
• Time in Patent Office: 1,476 Days
• Field of Search: 713/1, 713/100, 345/698, 345/204
• US Class Current: 713/1
• CPC Class Codes: G09G 2370/042 for monitor identification
• 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

A computer system having a computer main body and a monitor displaying a video signal from the computer main body and a control method thereof. The control method includes storing a display information of the video signal displayed on the monitor based on EDID supplied from the monitor in the computer main body; determining whether the display information of an input video signal transmitted from the computer main body to the monitor is suitable for the EDID of the monitor; displaying the input video signal if the display information of the input video signal is suitable for the EDID and supplying an error signal to the computer main body if the display information of the input video signal is not suitable for the EDID; and processing the input video signal according to the display information stored in the computer main body and supplying it to the monitor if the error signal is supplied to the computer main body.

Claims

1. A control method of a computer system including a main body and a monitor displaying a video signal from the main body, the control method of the computer system comprising:

storing a display information of the video signal displayed on the monitor, wherein the display information is based on Extended Display Identification Data (EDID) supplied from the monitor in the main body;

determining whether the display information of the input video signal transmitted from the main body to the monitor is suitable for the EDID of the monitor;

displaying the input video signal if determined that the display information of the input video signal is suitable for the EDID and supplying an error signal to the main body if determined that the display information of the input video signal is not suitable for the EDID;

processing the input video signal according to the display information stored in the main body and supplying the processed video signal to the monitor if the error signal is supplied to the computer main body, wherein a part of the error signal is the same as a part of the EDID; and

updating the storing the display information with an error EDID when the transmitted display information of the input video signal is not suitable for the EDID.

2. The control method of the computer system according to claim 1, further comprising supplying the EDID to the main body if determined that the display information of the input video signal is suitable for the EDID.

3. A computer system including a computer main body and a monitor displaying a video signal from the computer main body, the computer system comprising:

an Extended Display Identification Data (EDID) storing part provided in the monitor to store EDID of the monitor;

a display information storing part provided in the computer main body to store a display information of the video signal displayed on the monitor, the display information being based on the EDID;

a display control part determining whether the display information of the input video signal transmitted from the computer main body to the monitor is suitable for the EDID of the monitor, displaying the input video signal if the display information of the input video signal is suitable for EDID and supplying an error signal to the computer main body if the display information of the input signal is not suitable for the EDID; and

a video control part storing the display information of the video signal displayed on the monitor in the display information storing part, wherein the display information is based on the EDID and processing the input video signal according to the display information stored in the display information storing part and to supply the processed video signal to the monitor if the error signal is supplied from the display control part,

wherein a part of the error signal is the same as a part of the EDID, and

the EDID storing part is updated with an error EDID when the transmitted display information of the input video signal is not suitable for the EDID.

4. The computer system according to claim 3, wherein the display control part supplies the EDID to the computer main body, if the input video signal is suitable for the EDID.

5. A computer system comprising a computer main body and a monitor displaying a video signal from the computer main body, the computer system comprising:

an Extended Display Identification Data (EDID) storing pad provided in the monitor to store EDID of the monitor;

a display control pad determining whether a display information of the input video signal transmitted from the computer main body to the monitor is suitable for the EDID of the monitor, displaying the input video signal if the display information of the input video signal is suitable for the EDID, and supplying an error signal to the computer main body, if the display information of the input video signal is not suitable for the EDID; and

a video control pad calculating a display set-up value lower than the display information transmitted, if the error signal is supplied from the display control part, processing the input video signal according to the set-up value and supplying the processed video signal to the monitor,

wherein a part of the error signal is the same as a pad of the EDID, and

the error signal updates the EDID in the EDID storing part to result in an error EDID when the transmitted display information of the input video signal is not suitable for the EDID.

6. The computer system according to claim 5, wherein the display control pad supplies the EDID to the computer main body, if the input video signal is suitable for the EDID.