Method for dynamically identifying and configuring external display

A technology of dynamic identification and display, applied in the direction of digital output to display devices, etc., can solve the problem of inability to detect hot-plugging of VGA monitors, and achieve the effect of hot-plugging detection and dynamic configuration

Active Publication Date: 2012-05-16
CHINA STANDARD SOFTWARE
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Problems solved by technology

[0005] In order to solve the above problems and realize the hot-swapping technology of the VGA display, the present invention proposes a method for dynamically identifying and configuring an external display by regularly obtaining the EDID data of the display. The method obtains the EDID (Extended Display Identification Data , to expand the display iden

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  • Method for dynamically identifying and configuring external display

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[0019] In order to make the objectives, technical solutions, and beneficial effects of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0020] The overall scheme of the present invention is to detect the external VGA display actively and regularly, obtain and reset the working mode of the graphics card according to the best resolution and refresh rate of the current display. Specifically, the present invention regularly detects the EDID (Extended Display Identification Data) data information stored in the current display, and determines whether the current display has been replaced through correctness detection and difference comparison. If it is found that the current display is different from the previous one, immedia...

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Abstract

The invention relates to a method for dynamically identifying and configuring an external display. An external video graphics array (VGA) display is detected actively and regularly, so that a working mode of a display card is reconfigured according to the optimal resolution and the refresh rate of the current display. In the method, extended display identification data (EDID) information stored in the current display is detected regularly, so that whether the current display is changed can be determined through correctness detection and difference comparison; if the current display is different from the previous display, the optimal resolution and the refresh rate which are stored in the EDID of the current display are resolved immediately; and then the working mode of the display card can be reconfigured according to the new resolution and the refresh rate, so that the problem that a user changes the VGA display through hot plug, so that the resolution of the display cannot be automatically adjusted to be the optimal mode or the problem that an output of the display card exceeds a resolution value range, so that the display has a black screen and outputs abnormally can be solved.

Description

technical field [0001] The invention relates to the technical field of display hot plugging, in particular to a method for dynamically identifying and configuring an external display by regularly acquiring EDID data of the display. Background technique [0002] Display hot plug detection HPD (Hot Plugging Detect) is a detection signal output from the display to the computer host. The function of hot plug detection is that when the digital display is connected to or disconnected from the computer host through the HDMI / DVI (High Definition Multimedia Interface / Digital Visual Interface) interface, the computer host can The HPD pin of / DVI detects this event and responds. [0003] However, the early display interface VGA (Video Graphics Array, Video Graphics Array) cannot actively send the HPD signal to the host due to the lack of hot-swappable pins in the hardware structure, resulting in the host being unable to know the connection and disconnection of a VGA display. Unable t...

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Application Information

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IPC IPC(8): G06F3/14
Inventor 张伟
Owner CHINA STANDARD SOFTWARE
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