Computer screen image displaying method, computer having a vertical display device, and computer program product

• US 8,982,158 B2
• Filed: 12/03/2009
• Issued: 03/17/2015
• Est. Priority Date: 03/27/2009
• Status: Active Grant

• Current Assignee: Wistron Corporation
• Original Assignee: Wistron Corporation
• Inventors: Chen, Yu-Ping, Tsai, Ming-Hung
• Primary Examiner(s): Amini, Javid A
• Application Number:
  US12/630,020
• Publication Number:
  US 20100245391A1
• Time in Patent Office: 1,930 Days
• Field of Search: 345/649
• US Class Current: 345/649
• CPC Class Codes: G06F 3/1415 with means for detecting differences between the image stored in the host and the images displayed on the displays
• CPC Class Codes: G09G 2340/0464 Positioning
• CPC Class Codes: G09G 2370/04 Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller

Abstract

A computer screen image displaying method is executed after power-on of a computer and includes: receiving data associated with a detected default display mode of a BIOS of the computer and a display mode stored in a display device coupled to the computer; and determining if the default display mode of the BIOS and the display mode of the display panel match, and if so, causing a video controller of the computer to output image signals according to the display mode of the display panel, and if not, causing the video controller to output image signals corresponding to the default display mode of the BIOS. Thus, screen orientation can be controlled during BIOS POST to spare the user the trouble of changing screen orientation under an operating system environment, thereby enhancing efficiency and saving system resources.

Claims

1. A computer screen image displaying method, which is executed after power-on of a computer when a central processing unit of the computer reads and executes a basic input/output system (BIOS) stored in a memory device to begin hardware detection and image display, said computer screen image displaying method comprising:

receiving, through a receiving module of the central processing unit, data associated with a default display mode of the BIOS and a display mode stored in a display panel coupled to the computer; and

determining, through a comparison module of the central processing unit, if the default display mode of the BIOS matches the display mode of the display panel;

and if so, causing a control module of the central processing unit to issue via an interface circuit of the control module a control signal, which contains information associated with the display mode of the display panel, to a video controller of the computer to cause the video controller to output image signals according to the display mode stored in the display panel; and

if not, causing the control module to issue a control signal to the video controller to cause the video controller to output image signals corresponding to the default display mode of the BIOS, wherein the control module issues the control signal during a power on self test procedure during a boot-up of the computer and before initiation of an operating system.

2. The computer screen image displaying method of claim 1, wherein the display mode stored in the display panel is determined from supported resolution in extended display identification data (EDID) of the display panel.

3. The computer screen image displaying method of claim 1, wherein, when the display mode of the display panel is a landscape display mode and the default display mode of the BIOS is a portrait display mode, the control module of the central processing unit of the computer issues a command to video BIOS of the video controller to cause the video controller to output image signals corresponding to the default display mode of the BIOS.

4. The computer screen image displaying method of claim 1, wherein the default display mode of the BIOS is recorded in a non-volatile random-access memory using a storage module of the central processing unit and through a first interface circuit.

5. A computer comprising:

a display device including a display panel, said display panel being provided with a display memory device for storing extended display identification data (EDID);

and a computing device including

a computing memory device storing a basic input/output system (BIOS),

a video controller coupled to said display panel of said display device, and

a central processing unit which is configured such that, after power-on and during a power on self test procedure, said central processing unit reads and executes said BIOS stored in said computing memory device, receives, through a receiving module thereof, data associated with a default display mode of said BIOS and said EDID stored in said display panel, determines a display mode of said display panel from said EDID, and determines, through a comparison module thereof, if the default display mode of said BIOS matches the display mode of said display panel, and if so, said central processing unit causes a control module thereof to issue via an interface circuit of the control module a control command, which contains information associated with the display mode of the display panel, to said video controller to cause said video controller to output image signals according to the display mode determined from said EDID, and if not, said central processing unit causes said control module to issue a control signal to said video controller to cause said video controller to output image signals corresponding to the default display mode of said BIOS and before initiation of an operating system.

6. A computer program product comprising a non-transitory computer readable medium having a set of computer readable instructions stored therein which, when executed by a computer, causes the computer to execute a computer screen image displaying method, which comprises:

receiving, through a receiving module of the central processing unit, data associated with a detected default display mode of a BIOS of the computer and a display mode stored in a display panel coupled to the computer;

and determining, through a comparison module of the central processing unit, if the default display mode of the BIOS matches the display mode of the display panel;

and if so, causing a control module of the central processing unit to issue via an interface circuit of the control module a control signal, which contains information associated with the display mode of the display panel, to a video controller of the computer to cause the video controller to output image signals according to the display mode stored in the display panel; and

if not, causing the control module to issue a control signal to the video controller to cause the video controller to output image signals corresponding to the default display mode of the BIOS, wherein the control module issues the control signal during a power on self test procedure during a boot-up of the computer and before initiation of an operating system.

7. The computer program product of claim 6, wherein the display mode stored in the display panel is determined from supported resolution in extended display identification data (EDID) of the display panel.

8. The computer program product of claim 6, wherein, when the display mode of the display panel is a landscape display mode and the default display mode of the BIOS is a portrait display mode, the control module of the central processing unit of the computer issues a command to video BIOS of the video controller to cause the video controller to output image signals corresponding to the default display mode of the BIOS.

9. The computer program product of claim 6, wherein the default display mode of the BIOS is recorded in a non-volatile random-access memory using a storage module of the central processing unit and through a first interface circuit.