CN101635139A - Method for recording display EDID - Google Patents
Method for recording display EDID Download PDFInfo
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- CN101635139A CN101635139A CN200910305956A CN200910305956A CN101635139A CN 101635139 A CN101635139 A CN 101635139A CN 200910305956 A CN200910305956 A CN 200910305956A CN 200910305956 A CN200910305956 A CN 200910305956A CN 101635139 A CN101635139 A CN 101635139A
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- edid
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- dvi
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Abstract
The invention relates to a method for recording a display EDID, which is characterized in that when the display EDID is recorded, the VGA EDID of a display is transmitted to display MCU software; when an MCU receives the VGA EDID and stores the data in the corresponding storage position, a different byte between the VGA EDID and DVI EDID is modified into DVI EDID, and the modified DVI EDID is copied to the position on a DVI interface, where the EDID is stored. The invention simplifies the EDID recording process and improves the production efficiency and the quality of the display.
Description
Technical field
The method that the present invention relates to a kind of recording display EDID is used and the display production field.
Background technology
Known, if display has a plurality of input source, each source all needs EDID (the ExtendedDisplay Identification Data Standard) data of burning correspondence.As display with VGA and DVI and HDMI, need the EDID data of VGA interface and the equal burning correspondence of DVI interface, its burning flow process is as shown in Figure 1.Give birth at display on the processing procedure of factory, burning EDID needs about time spent 3S.The needed time of a plurality of interfaces is (quantity of 3s* interface), has influence on the production efficiency of producing line.And to guarantee that all the SN number of being exported is consistent during each interface burning.
Summary of the invention
In order to overcome the deficiency of above-mentioned technology, the purpose of this invention is to provide a kind of method of recording display EDID, it can effectively improve the burning flow process of EDID, improves the production efficiency and the quality of display.
The present invention realizes like this, a kind of method for recording display EDID, it is characterized in that: when recording display EDID, VGA EDID data with display sends to display MCU software earlier, the VGA EDID data that receives as MCU, with this file maintenance behind corresponding memory location, again with VGA EDID data and the discrepant byte of DVI EDID data, be revised as the DVIEDID data, and the position that the EDID of amended DVI EDID data copy to DVI interface is deposited.
The present invention with VGA EDID data and the discrepant byte of DVI EDID data, directly is revised as the DVIEDID data by the MCU software, has effectively shortened the burning process, and production efficiency and display quality are provided, and has marketable value preferably.
Description of drawings
Fig. 1 is known recording display EDID schematic flow sheet.
Fig. 2 is a recording display EDID schematic flow sheet of the present invention.
Fig. 3 is the EDID data synoptic diagram of VGA of the present invention and DVI.
Embodiment
Below in conjunction with drawings and Examples the present invention is described further.
As shown in Figure 2, the invention provides a kind of method for recording display EDID, it is characterized in that: when recording display EDID, VGA EDID data with display sends to display MCU software earlier, the VGA EDID data that receives as MCU, with this file maintenance behind corresponding memory location, again with VGA EDID data and the discrepant byte of DVI EDID data, be revised as the DVIEDID data, and the position that the EDID of amended DVI EDID data copy to DVI interface is deposited.
The VGA EDID data of described display is to send to display MCU software by the I2C communication modes.
In preferred embodiment of the present invention, the LCD of this model of PHILIPS 220E1 has VGA and two interfaces of DVI, the EDID data of VGA that the client provides and DVI as shown in Figure 3, as we know from the figure, though be two distinct interfaces of same display, but no matter be VGA or DVI interface, they the EDID data in the relevant date of manufacture, product type, produce sequence number, the frequency of supporting, these essential informations such as production firm must be identical information.Difference is only at this BYTE of 0x14, and defining this port is digital signal or simulating signal, and the checksum difference that calculates at last.According to this rule, revised the mode of burning EDID.That is, as long as the EDID burning program provides the EDID data of VGA to MCU, MCU leaves 128 BYTE of VGA EDID that receive among the EEPROM of VGA EDID in.The data of receiving this BYTE of 0x14 of data are revised as 0x80 by software, and recomputate checksum, revised data are deposited among the EEPROM that 128 BYTE of DVI EDID deposit.Can save and produce the activity duration that line is produced, and simplify flow process.
Correlative code is as follows in the software:
#ifdef?EDID_FROM_A_ONLY
{
unsigned?char*pDigital；
//unsigned?char?check?；
DDC_CTRL_0＝0；
pDigital＝&DDCPtr0；
// give DVI EDID array with the Copy of EDID data elder generation of VGA
for(k＝0；k＜128；k++)
{
*(pDigital+k)＝*(p+k)；
}
* (pDigital+0x14)=0x80; // this BYTE of 0x14 is revised as the data 0x80 of DVI interface
* (pDigital+0x7f)=(unsigned char) * (p+0x7f)+((unsignedchar) (* (p+0x14))-0x80); The checksum of // calculating DVI EDID
For (k=0; K＜128; K=k+16) // DVI EDID is stored in memory location corresponding among the EEPROM
WritePage24C16(DDC_ADDR_DIGITAL+k，k，pDigital，16)；
}
}
#endif
The above only is preferred embodiment of the present invention, and all equalizations of being done according to the present patent application claim change and modify, and all should belong to covering scope of the present invention.
Claims (2)
1. method for recording display EDID, it is characterized in that: when recording display EDID, VGA EDID data with display sends to display MCU software earlier, the VGA EDID data that receives as MCU, after this file maintenance being arrived the memory location of correspondence, with VGA EDID data and the discrepant byte of DVI EDID data, be revised as the DVIEDID data again, and the position that the EDID of amended DVI EDID data copy to DVI interface is deposited.
2. a kind of method for recording display EDID according to claim 1 is characterized in that: the VGA EDID data of described display is to send to display MCU software by the I2C communication modes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103059561A CN101635139B (en) | 2009-08-22 | 2009-08-22 | Method for recording display EDID |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103059561A CN101635139B (en) | 2009-08-22 | 2009-08-22 | Method for recording display EDID |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101635139A true CN101635139A (en) | 2010-01-27 |
| CN101635139B CN101635139B (en) | 2011-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009103059561A Expired - Fee Related CN101635139B (en) | 2009-08-22 | 2009-08-22 | Method for recording display EDID |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101887710A (en) * | 2010-06-30 | 2010-11-17 | 福建捷联电子有限公司 | Display having EDID (Extended Display Identification Data) automatic burning function at first boot |
| CN102385849A (en) * | 2011-11-29 | 2012-03-21 | 黄冈新北环电子科技有限公司 | Intelligent EDID (Extended Display Identification Data) burning method |
| CN103810982A (en) * | 2012-11-09 | 2014-05-21 | 冠捷投资有限公司 | EDID burning method of display with multiple video ports |
| CN106448534A (en) * | 2016-10-09 | 2017-02-22 | 微鲸科技有限公司 | Method and device for configuring and renewing EDID information |
| CN106444102A (en) * | 2016-08-05 | 2017-02-22 | 捷星显示科技（福建）有限公司 | LCD EDID burning method |
| CN110221844A (en) * | 2019-05-13 | 2019-09-10 | 深圳市华星光电技术有限公司 | Display device |
-
2009
- 2009-08-22 CN CN2009103059561A patent/CN101635139B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101887710A (en) * | 2010-06-30 | 2010-11-17 | 福建捷联电子有限公司 | Display having EDID (Extended Display Identification Data) automatic burning function at first boot |
| CN102385849A (en) * | 2011-11-29 | 2012-03-21 | 黄冈新北环电子科技有限公司 | Intelligent EDID (Extended Display Identification Data) burning method |
| CN103810982A (en) * | 2012-11-09 | 2014-05-21 | 冠捷投资有限公司 | EDID burning method of display with multiple video ports |
| CN103810982B (en) * | 2012-11-09 | 2016-03-02 | 冠捷投资有限公司 | There is the EDID method for burn-recording of the display of multiple video port |
| CN106444102A (en) * | 2016-08-05 | 2017-02-22 | 捷星显示科技（福建）有限公司 | LCD EDID burning method |
| CN106448534A (en) * | 2016-10-09 | 2017-02-22 | 微鲸科技有限公司 | Method and device for configuring and renewing EDID information |
| CN110221844A (en) * | 2019-05-13 | 2019-09-10 | 深圳市华星光电技术有限公司 | Display device |
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| Publication number | Publication date |
|---|---|
| CN101635139B (en) | 2011-07-20 |
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