CN101719353B - Extended display identification data burning method for Display Port liquid crystal display - Google Patents
Extended display identification data burning method for Display Port liquid crystal display Download PDFInfo
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- CN101719353B CN101719353B CN200910112870A CN200910112870A CN101719353B CN 101719353 B CN101719353 B CN 101719353B CN 200910112870 A CN200910112870 A CN 200910112870A CN 200910112870 A CN200910112870 A CN 200910112870A CN 101719353 B CN101719353 B CN 101719353B
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Abstract
The invention discloses an extended display identification data (EDID) burning method for a Display Port liquid crystal display. In the method, the EDID is burnt onto port storages of the liquid crystal display by a personal computer (PC), a burner, a burning program and liquid crystal display MCU (singlechip) software. In the method, the EDID is first burnt onto VGA and DVI port storages according to an IIC communication protocol and then directly burnt onto a Display Port port storage through the VGA port according to a DDC/CI communication protocol. The method provided by the invention has the advantages that: the EDID data can be burnt onto the VGA, DVI and Display Port ports by simply one burning system; and the burning of the EDID is accurate, convenient, efficient and low in cost.
Description
Technical field the present invention relates to the data burning field of LCD, relates in particular to the method for a kind of liquid crystal display (LCD) DDC off-line burning.
The background technology LCD generally comprises VGA (Video Graphics Array) analog signal interface, DVI (Digital Visual Interface) digital signal interface; These interfaces carry out data communication through DDC (Digital Display Channel DDC) with main frame; The data of DDC transmission are called EDID (Extended Display Identification Data extending display identification data); EDID comprises the basic parameter of display device, like data such as manufacturer, name of product, maximum row field frequency, supported resolution.
Novel LCD also has additional digital signal Display Port interface; DisplayPort is the interface specification by VESA (VESA) approval, and its main advantage is to have very high message transmission rate, connects easily, perfect content protecting and based on the data transfer mode of packet switch.The EDID data length has two kinds of 128 bytes and 256 bytes, and the EDID data of VGA, DVI and Display Port interface memory stored all are 128 bytes at present.
Every LCD all need be write the EDID data in each interface memory through burning program; Existing technology generally is through the homemade cd-rom recorder of manufacturer and supporting burning program each interface of every machine to be carried out burning; Because the structure of VGA, DVI interface is different with the structure of DisplayPort interface; Burning Display Port interface need increase an independent burning of interface card extender, its burning efficient is low, needs the special-purpose programming system of many covers, burning cost height again.
Summary of the invention the object of the invention provides a kind of low cost, high efficiency Display Port liquid crystal display EDID method for burn-recording.
The present invention adopts following technical scheme: the present invention utilizes PC computing machine, cd-rom recorder, burning program and LCD MCU (single-chip microcomputer) software EDID to be burnt in each interface memory of LCD; The present invention according to IIC (Inter-Integrated Circuit is the I2C bus) communication protocol with the EDID data burning in VGA, DVI interface memory, more directly through the VGA interface according to DDC/CI communication protocol with the EDID data burning in Display Port interface memory.DDC/CI communication protocol is based on a semiduplex communication protocol of IIC communication protocol, and each interface memory type is generally EEPROM.
Describedly directly through the VGA interface according to DDC/CI communication protocol with the EDID data burning to the flow process in the Display Port interface memory be: burning program sends the flag of EDID data earlier and gives LCD MCU software; LCD MCU software is prepared to receive after receiving flag; Burning program is divided into 7 transmissions with 128 bytes of the EDID data of LCD Display Port interface; Transmit 20 byte datas to LCD MCU software according to DDC/CI communication protocol is each, every the data that LCD MCU software will receive are again all deposited the corresponding memory location of EDID in the Display Port interface memory.
After described burning program has transmitted data; Burning program check (CRC) (the Cyclic Redundancy Check CRC) flag of redispatching; LCD MCU software calculates the CRC check sign indicating number after receiving flag; Return to burning program to verify whether burning is qualified to the CRC check sign indicating number again, remove flag, show qualified information, just remove flag and show the burning error message as verifying that burning is defective like the qualified back of checking burning.
Adopt method provided by the invention, only need to use the EDID data the writable VGA of cover programming system, DVI interface and Display Port interface, burning EDID data are accurately convenient, efficient is high, the burning cost is low.
Description of drawings combines accompanying drawing that the present invention is done further elaboration at present:
Fig. 1 is a system chart of the present invention;
Fig. 2 is a schematic flow sheet of the present invention.
Embodiment is as shown in Figure 1; The present invention adopts PC computing machine 1, cd-rom recorder 2, burning program 3 and LCD MCU software 4 EDID to be burnt in each interface memory 5 of LCD; The present invention according to IIC communication protocol with the EDID data burning in VGA, DVI interface memory 51, more directly through the VGA interface according to DDC/CI communication protocol with the EDID data burning in Display Port interface memory 52.
As shown in Figure 2; Directly through the VGA interface according to DDC/CI communication protocol with the EDID data burning to the flow process in the Display Port interface memory be: burning program sends the flag of EDID data earlier and gives LCD MCU software; LCD MCU software is prepared to receive after receiving flag; Burning program is divided into 7 transmissions according to DDC/CI communication protocol with 128 bytes of the EDID data of the Display Port interface of LCD; 20 byte datas of each transmission are given LCD MCU software, and LCD MCU software is deposited the corresponding address of Display Port interface memory EEPROM 24C16 with the data that receive.After data transmit and accomplish; Burning program sends the check (CRC) flag; LCD MCU software calculates the CRC check sign indicating number after receiving flag; Return to burning program to verify whether burning is qualified to the CRC check sign indicating number again, remove flag, show qualified information, just remove flag and show the burning error message as verifying that burning is defective like the qualified back of checking burning.
Claims (1)
1. Display Port liquid crystal display EDID method for burn-recording; It is characterized in that: utilize PC computing machine, cd-rom recorder, burning program and LCD MCU software EDID to be burnt in each interface memory of LCD; According to IIC communication protocol with the EDID data burning in VGA, DVI interface memory, more directly through the VGA interface according to DDC/CI communication protocol with the EDID data burning in the DisplayPort interface memory; Describedly directly through the VGA interface according to DDC/CI communication protocol with the EDID data burning to the flow process in the Display Port interface memory be: burning program sends the flag of EDID data earlier and gives LCD MCU software; LCD MCU software is prepared to receive after receiving flag; Burning program is divided into 7 transmissions with 128 bytes of the EDID data of LCD Display Port interface; Transmit 20 byte datas to LCD MCU software according to DDC/CI communication protocol is each, every the data that LCD MCU software will receive are again all deposited the corresponding memory location of EDID in the Display Port interface memory; After described burning program has transmitted data; The burning program check (CRC) flag of redispatching; LCD MCU software calculates the CRC check sign indicating number after receiving flag; Return to burning program to verify whether burning is qualified to the CRC check sign indicating number again, remove flag, show qualified information, just remove flag and show the burning error message as verifying that burning is defective like the qualified back of checking burning.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910112870A CN101719353B (en) | 2009-11-27 | 2009-11-27 | Extended display identification data burning method for Display Port liquid crystal display |
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| CN200910112870A CN101719353B (en) | 2009-11-27 | 2009-11-27 | Extended display identification data burning method for Display Port liquid crystal display |
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| CN101719353A CN101719353A (en) | 2010-06-02 |
| CN101719353B true CN101719353B (en) | 2012-09-05 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102110473B (en) * | 2011-01-05 | 2013-06-26 | 深圳创维－Rgb电子有限公司 | Method and system for programming and checking EDID (Extended Display Identification Data) of display device |
| CN104598325B (en) * | 2015-02-10 | 2018-05-08 | 武汉精测电子集团股份有限公司 | The EDID data recording methods of calibration of display module |
| CN105975419B (en) * | 2016-04-27 | 2019-08-20 | 北京小鸟看看科技有限公司 | A kind of Displayport interface and its method of clock recovery |
| CN106847224A (en) * | 2017-04-06 | 2017-06-13 | 深圳市华星光电技术有限公司 | LCD data recording tool parallel method and system |
| CN110221844A (en) * | 2019-05-13 | 2019-09-10 | 深圳市华星光电技术有限公司 | Display device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1346085A (en) * | 2000-09-26 | 2002-04-24 | 民生科技股份有限公司 | Method for updating program code used for embedded microcontrol unit |
| CN101079247A (en) * | 2007-06-05 | 2007-11-28 | 东莞黄江达裕科技电子厂 | Display apparatus data updating method and device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1346085A (en) * | 2000-09-26 | 2002-04-24 | 民生科技股份有限公司 | Method for updating program code used for embedded microcontrol unit |
| CN101079247A (en) * | 2007-06-05 | 2007-11-28 | 东莞黄江达裕科技电子厂 | Display apparatus data updating method and device |
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Address after: 350300 Fuqing City, Fuzhou, Fujian, the reunification of overseas Chinese economic and Technological Development Zone Patentee after: TPV Electronic Technology (Fujian) Co., Ltd Address before: 350301 Fujian economic and Technological Development Zone, Fuqing Patentee before: Fujian Jielian Electronic Co Ltd |
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