CN108156398A - A kind of VGA Video Graphics Arrays and its method of work - Google Patents
A kind of VGA Video Graphics Arrays and its method of work Download PDFInfo
- Publication number
- CN108156398A CN108156398A CN201810006109.4A CN201810006109A CN108156398A CN 108156398 A CN108156398 A CN 108156398A CN 201810006109 A CN201810006109 A CN 201810006109A CN 108156398 A CN108156398 A CN 108156398A
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- CN
- China
- Prior art keywords
- edid information
- control unit
- vga
- display
- video
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
The present invention relates to a kind of VGA Video Graphics Arrays and its method of works.VGA Video Graphics Arrays of the present invention, when handling DDC signals, control unit circuit reads the EDID information of two display screens first after the power is turned on, after analyzing and processing, synthesize new EDID information, and put it into the EEPROM of each PC machine DDC signal ports, after PC machine starts, read the EDID information of synthesis.VGA Video Graphics Arrays of the present invention by the comparison and recombination of EDID information, realize any switching laws function of the Video Graphics Array based on VGA signals, and ensureing that PC reads the resolution ratio of output rgb signal after EDID information can be in all display screen display；Monitoring quantity and the flexibility of computer are greatly increased, facilitates the Centralized Monitoring of multicomputer particularly server cluster.
Description
Technical field
The present invention relates to a kind of VGA Video Graphics Arrays and its method of works, belong to the technology neck of VGA vision signals switching
Domain.
Background technology
The development of computer technology forces computer performance index constantly to be promoted, but the development of computer application field is very
It is extremely more swifter and more violent in itself than computer.In many technical fields, single computer has been unable to meet entire computer application system
The needs of system, it usually needs the system that two or more computers form a perfect in shape and function, huge system even need
Tens computers is wanted to build jointly.The multiple of different computer application fields are usually required to the management of computer system
Engineer monitors simultaneously and operation, and in this case, Video Graphics Array plays an important role, and more people can monitor simultaneously
Multiple computer equipments.
Video Graphics Array (English：Video Graphics Array, abbreviation VGA) to be IBM proposed in 1987 one
A computer display standard using analog signal.VGA is the standard that most manufacturers support jointly, and PC is adding
It is downloaded from before oneself unique driver, it is necessary to support the standard of VGA.No matter VGA this term usually its graphics device, and
It is directly used in the resolution ratio of denotion 640 × 480.VGA equipment can store 4 complete EGA color versions simultaneously, and between them
Can real-time discoloration be appeared as on picture with rapid translating.For example, the booting picture of Microsoft's Windows series of products
Face is still using VGA display patterns, this deficiency for also illustrating its resolution ratio and carrying chromatic number.
The array for being currently based on VGA videos shows that the situation about connection display different size is without special effective
Treatment technology, EDID information processings are bad, it is most likely that cause display can not VGA Display video situation, influence client's body
It tests.
Invention content
In view of the deficiencies of the prior art, the present invention provides a kind of VGA Video Graphics Arrays.
The present invention also provides a kind of method of works of above-mentioned VGA Video Graphics Arrays.
Summary of the invention
VGA Video Graphics Arrays of the present invention, when handling DDC signals, control unit circuit is first after the power is turned on
The EDID information of two display screens is first read, after analyzing and processing, synthesizes new EDID information, and put it into each PC machine
In the EEPROM of DDC signal ports, after PC machine starts, the EDID information of synthesis is read.
The technical scheme is that：
A kind of VGA Video Graphics Arrays include, and are provided with four road VGA video inputs and the video of two-way VGA videos output
Antenna array control plate；VGA video inputs pass sequentially through Video Expansion circuit, video switch circuit and display displays and connect；Depending on
Frequency switching circuit is connect with control unit.
A kind of method of work of above-mentioned VGA Video Graphics Arrays is as follows including step：
1) quantity of control unit detection display displays；It is shown when control unit is detected there are one more than display
When showing device connection, the EDID information of display displays is actively read to control unit；
If 2) model of display displays is different, control unit compares the EDID information of different displays
Compared with and recombination, ensure that PC machine is read the resolution ratio of output rgb signal after EDID information and can be shown on all display displays
Show；
The detailed process for comparing and recombinating is that multiple display EDID information of reading are carried out byte level by control unit
Compare one by one, if byte information is different, the EDID information of relatively low specification display of being subject to is recombinated；
3) it will compare and the EEPROM that each PC machine connects be written with EDID information after recombination；
4) the EDID information in EEPROM is read in PC machine start-up course；
5) the synchronous H signal of the rgb signal in PC machine VGA vision signals, row and field synchronization V signal pass through Video Expansion circuit
Carry out the duplication extension of " 1to 2 "；
6) the synchronous H signal of rgb signal, row and field synchronization V signal after extending are output to by video switch circuit
On display displays；Control unit controls the switching of switching circuit, and the switching input of control unit is an externally input.
Beneficial effects of the present invention are：
VGA Video Graphics Arrays of the present invention by the comparison and recombination of EDID information, are realized based on VGA signals
Any switching laws function of Video Graphics Array, ensureing that PC reads the resolution ratio of output rgb signal after EDID information can be all aobvious
Show screen display；Monitoring quantity and the flexibility of computer are greatly increased, facilitates the collection of multicomputer particularly server cluster
Middle monitoring.
Description of the drawings
Fig. 1 is the structure diagram of VGA Video Graphics Arrays of the present invention；
Fig. 2 is the method flow diagram of comparison and recombination that control unit of the present invention carries out EDID information.
Specific embodiment
With reference to embodiment and Figure of description, the present invention will be further described, but not limited to this.
Embodiment 1
As shown in Figure 1.
A kind of VGA Video Graphics Arrays include, and are provided with four road VGA video inputs and the video of two-way VGA videos output
Antenna array control plate；VGA video inputs pass sequentially through Video Expansion circuit, video switch circuit and display displays and connect；Depending on
Frequency switching circuit is connect with control unit.
Embodiment 2
As shown in Figure 2.
A kind of method of work of VGA Video Graphics Arrays as described in Example 1 is as follows including step：
1) quantity of control unit detection display displays；It is shown when control unit is detected there are one more than display
When showing device connection, the EDID information of display displays is actively read to control unit；
If 2) model of display displays is different, control unit compares the EDID information of different displays
Compared with and recombination, ensure that PC machine is read the resolution ratio of output rgb signal after EDID information and can be shown on all display displays
Show；
The detailed process for comparing and recombinating is that multiple display EDID information of reading are carried out byte level by control unit
Compare one by one, if byte information is different, the EDID information of relatively low specification display of being subject to is recombinated；
3) it will compare and the EEPROM that each PC machine connects be written with EDID information after recombination；
4) the EDID information in EEPROM is read in PC machine start-up course；
5) the synchronous H signal of the rgb signal in PC machine VGA vision signals, row and field synchronization V signal pass through Video Expansion circuit
Carry out the duplication extension of " 1 to 2 "；
6) the synchronous H signal of rgb signal, row and field synchronization V signal after extending are output to by video switch circuit
On display displays；Control unit controls the switching of switching circuit, and the switching input of control unit is an externally input.
Claims (2)
1. a kind of VGA Video Graphics Arrays, which is characterized in that defeated including being provided with four road VGA video inputs and two-way VGA videos
The video antenna array control plate gone out；VGA video inputs pass sequentially through Video Expansion circuit, video switch circuit and display and show
Device connects；Video switch circuit is connect with control unit.
2. a kind of method of work of VGA Video Graphics Arrays as described in claim 1, which is characterized in that as follows including step：
1) quantity of control unit detection display displays；When control unit detects that there are one more than display displays
During connection, the EDID information of display displays is actively read to control unit；
If 2) model of display displays is different, control unit the EDID information of different displays is compared and
Recombination ensures that PC machine is read the resolution ratio of output rgb signal after EDID information and can be shown on all display displays；
The detailed process for comparing and recombinating is that multiple display EDID information of reading are carried out byte level one by one by control unit
Compare, if byte information is different, the EDID information of relatively low specification display of being subject to is recombinated；
3) it will compare and the EEPROM that each PC machine connects be written with EDID information after recombination；
4) the EDID information in EEPROM is read in PC machine start-up course；
5) the synchronous H signal of the rgb signal in PC machine VGA vision signals, row and field synchronization V signal are carried out by Video Expansion circuit
The duplication extension of " 1 to 2 "；
6) the synchronous H signal of rgb signal, row and field synchronization V signal after extending are output to display by video switch circuit and show
Show on device；Control unit controls the switching of switching circuit, and the switching input of control unit is an externally input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810006109.4A CN108156398A (en) | 2018-01-03 | 2018-01-03 | A kind of VGA Video Graphics Arrays and its method of work |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810006109.4A CN108156398A (en) | 2018-01-03 | 2018-01-03 | A kind of VGA Video Graphics Arrays and its method of work |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108156398A true CN108156398A (en) | 2018-06-12 |
Family
ID=62460638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810006109.4A Pending CN108156398A (en) | 2018-01-03 | 2018-01-03 | A kind of VGA Video Graphics Arrays and its method of work |
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| CN (1) | CN108156398A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114401367A (en) * | 2022-01-14 | 2022-04-26 | 西安超越申泰信息科技有限公司 | Video switching display method and system based on distributed EDID storage |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060132473A1 (en) * | 2004-12-17 | 2006-06-22 | Microsoft Corporation | System and method for managing computer monitor configurations |
| CN201845327U (en) * | 2010-09-29 | 2011-05-25 | 联想(北京)有限公司 | Display device and computer |
| US20120139973A1 (en) * | 2009-03-11 | 2012-06-07 | Leonard Tsai | Color space matching of video signals |
| CN103295554A (en) * | 2012-02-27 | 2013-09-11 | 冠捷投资有限公司 | Integrated circuit capable of providing extension display sign data based on image signals |
| CN104796626A (en) * | 2015-04-17 | 2015-07-22 | 深圳市东明炬创电子有限公司 | Hybrid matrix dynamic intelligent EDID (extended display identification data) algorithm |
-
2018
- 2018-01-03 CN CN201810006109.4A patent/CN108156398A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060132473A1 (en) * | 2004-12-17 | 2006-06-22 | Microsoft Corporation | System and method for managing computer monitor configurations |
| US20120139973A1 (en) * | 2009-03-11 | 2012-06-07 | Leonard Tsai | Color space matching of video signals |
| CN201845327U (en) * | 2010-09-29 | 2011-05-25 | 联想(北京)有限公司 | Display device and computer |
| CN103295554A (en) * | 2012-02-27 | 2013-09-11 | 冠捷投资有限公司 | Integrated circuit capable of providing extension display sign data based on image signals |
| CN104796626A (en) * | 2015-04-17 | 2015-07-22 | 深圳市东明炬创电子有限公司 | Hybrid matrix dynamic intelligent EDID (extended display identification data) algorithm |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114401367A (en) * | 2022-01-14 | 2022-04-26 | 西安超越申泰信息科技有限公司 | Video switching display method and system based on distributed EDID storage |
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Application publication date: 20180612 |