CN101887703A - Multi-interface structure of liquid crystal display and extended display identification data (EDID) burning method thereof - Google Patents
Multi-interface structure of liquid crystal display and extended display identification data (EDID) burning method thereof Download PDFInfo
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- CN101887703A CN101887703A CN2010102037036A CN201010203703A CN101887703A CN 101887703 A CN101887703 A CN 101887703A CN 2010102037036 A CN2010102037036 A CN 2010102037036A CN 201010203703 A CN201010203703 A CN 201010203703A CN 101887703 A CN101887703 A CN 101887703A
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Abstract
The invention discloses a multi-interface structure of a liquid crystal display and an extended display identification data (EDID) burning method thereof. In the structure, an I/O interface of a master control chip of the liquid crystal display is connected with serial clock lines (SCL) and serial data lines (SDA) of more than two liquid crystal display interface memories; and microcontroller unit (MCU) software in the master control chip directly reads and writes the EDID of the liquid crystal display interface memories through the connection circuit. The EDID burning method for the multi-interface structure comprises the following steps of: electrically connecting one end of a burner and a parallel port of a personal computer (PC), and connecting the other end of the burner and an analogue signal interface of the liquid crystal display through a signal line; and receiving all the EDID from the analogue signal interface, analyzing the EDID of each interface and storing the EDID into the corresponding interface memories respectively by using the MCU software of the liquid crystal display. The EDID burning method has the advantage of finishing the EDID burning of a plurality of interfaces of the liquid crystal display, along with high working efficiency and high burning reliability.
Description
Technical field the present invention relates to field of liquid crystal, relates in particular to a plurality of interface structures of a kind of LCD and EDID data burning method thereof.
The background technology LCD generally comprises analog signal interface or digital signal interface, these interfaces carry out data communication by DDC (Display DataChannel DDC) with main frame, the data of DDC transmission are called EDID (Extended Display IdentificationData extending display identification data), EDID comprises the basic parameter of display device, as data such as manufacturer, name of product, maximum row field frequency, supported resolution.When making LCD, need be in the LCD interface memory with the EDID data burning.
Every LCD all needs by the DDC burning program EDID data to be write in the LCD interface memory, LCD can have VGA (Video Graphics Array analog signal interface), DVI (Digital Visual Interface digital signal interface), HDMI (High-Definition Multimedia Interface high-definition multimedia signaling interface), several different analog signal interfaces and digital signal interfaces such as Display Port signaling interface, the storer of each interface can be EEPROM (Electrically Erasable Programmable Read-Only Memory EEPROM (Electrically Erasable Programmable Read Only Memo)) or FLASH (flash memory) type.
In existing technology, general LCD main control chip and each LCD interface memory directly link to each other, the EDID data that LCD MCU (single-chip microcomputer) software can not direct read burning LCD interface memory.And the EDID burning of the many interfaces of existing LCD generally is to carry out on the production line of LCD packing shop, each interface of LCD needs all that corresponding signal lines links to each other with cd-rom recorder could burning, its cd-rom recorder needs a plurality of interfaces that are complementary, the cd-rom recorder complex structure need take more PC computer parallel port resource; Because each interface is all wanted manual wiring separately, its inefficiency, cost height.
Summary of the invention the object of the invention provides the many interface structures of a kind of LCD, and the EDID data burning method that just can finish these many interface structures by a signal wire and burning program.
The technical solution used in the present invention is: the I/O interface of the main control chip of LCD is connected with the SCL clock line and the SDA data line of two above LCD interface memories in the many interface structures of LCD of the present invention, and the MCU software in the main control chip is by the EDID data of above-mentioned connecting circuit direct read burning LCD interface memory.
The EDID data burning method of many interface structures of the present invention be utilize PC computing machine, cd-rom recorder, burning program with the EDID data burning in the LCD interface memory, cd-rom recorder one end and PC computer parallel port electrically connect, the cd-rom recorder other end links to each other with above-mentioned analog signal interface by a signal wire, LCD MCU software receives all EDID data from analog signal interface, and leaves in respectively in the corresponding interface memory after the EDID data that receive are analyzed.
The process step of the EDID data burning method of many interface structures of the present invention is as follows:
A, burning program send the burning instruction to LCD MCU software and prepare burning EDID data, defining hexadecimal burning order format is: 0x6E 0x51 Length 0x01 0xFE 0xEl 0xA5 0x03 0x00, and wherein Length represents to send the length of data;
B, LCD MCU software is replied the sexadecimal information of 2 bytes of passback, first byte representation LCD analog signal interface type of memory wherein, its type has two kinds of EEPROM and FLASH: definition 0x01 represents EEPROM, 0x02 represents FLASH, second kind of interface and the interface quantity that the byte representation LCD is all, the VGAl of definition hexadecimal code corresponding respectively expression LCD from a high position to the low level, VGA2, DVI1, DVI2, HDMI1, HDMI2, DP1, the DP2 interface, represent in the LCD not this interface with 0, represent that with 1 this interface is arranged in the LCD;
C, burning program are determined the writing mode of EDID data according to 2 byte hexadecimal information of LCD MCU software passback: when LCD analog signal interface storer is the EEPROM type, adopt IIC (Inter-Integrated Circuit is the I2C bus) communication modes direct burning EDID data; When LCD analog signal interface storer is the FLASH type, adopt DDC/CI (DisplayData Channel Command Interface, DDC/CI communication protocol is based on a semiduplex communication protocol of IIC communication protocol) communication modes burning EDID data, its 128 byte EDID data are divided four transmissions, each 32 bytes that send, the order format of its DDCCI communication modes is defined as: 0x6E 0x51 Length 0x03 0xFE 0xEB 0x20 BlockNo Byte1 Data, wherein Length represents that this sends the length of data, BlockNo represents current for which time sends the EDID data, and Byte1 represents the current EDID data will send to which interface of LCD;
After D, LCD analog signal interface storer EDID data burning are finished, burning program receives the LCD back information and judges whether transmission is successful, definition back information ACK is that 0X01 represents to send successfully, and whether the LCD interface memory EDID data that burning program further reads burning when sending are successfully compared the detection burning qualified; ACK is that 0x00 represents that transmission is unsuccessful, and burning program showed defective information when transmission was unsuccessful;
After E, LCD analog signal interface storer EDID data burning are qualified, also has other kinds class interface as LCD, burning program continues to adopt DDCCI communication modes burning EDID data, its 128 byte EDID data are divided four transmissions, each 32 bytes that send, the order format of its DDCCI communication modes is defined as: 0x6E 0x51 Length 0x03 0xFE 0xEB 0x20 BlockNo Byte1 Data, and wherein: BlockNo represents which time sends the EDID data when current; Byte1 represents the current EDID data will send to which interface of LCD; Do not had other kinds class interface as LCD, then finished burning;
After F, all LCD interface memory EDID data burnings are finished, burning program receives the LCD back information and confirms whether burning is successful, definition back information ACK is that 0X01 represents the burning success, and burning program shows qualified information during the burning success; ACK is that 0x00 represents that burning is unsuccessful, and burning program showed defective information when burning was unsuccessful.
The many interface structures of LCD provided by the invention make the LCD MCU software can direct read burning LCD interface memory EDID data, the present invention utilizes a signal wire and burning program just can finish the EDID burning of the many interfaces of LCD, high efficiency; Method for burn-recording provided by the invention defines the communication instruction form, and burning program is the EDID data of each interface of burning accurately, its burning good reliability.
Description of drawings now is further elaborated the present invention in conjunction with the accompanying drawings:
Fig. 1 is LCD main control chip of the present invention and analog signal interface connecting circuit schematic diagram;
Fig. 2 is LCD main control chip of the present invention and digital signal interface connecting circuit schematic diagram;
Fig. 3 is the synoptic diagram of a plurality of interface structure data burning methods of LCD of the present invention.
Embodiment as shown in Figure 1, link to each other with DDC1_SDA pin 422 with the I/O interface DDC1_SCL pin 421 of main control chip 42 behind the SCL clock line 411 resistance in series R101 of the VGA of LCD 4 of the present invention (claiming DSUB again) analog signal interface storer 41, the SDA data line 412 resistance in series R113, main control chip adopts Scalar IC;
As shown in Figure 2, link to each other with DDC2_SDA pin 424 with the I/O interface DDC2_SCL pin 423 of main control chip 42 behind the SCL clock line 431 resistance in series R118 of DVI digital signal interface storer 43, the SDA data line 432 resistance in series R119; DVI digital signal interface storer can adopt the 24C02 chip of eeprom memory type.
After circuit connected, the MCU software in the main control chip 42 can receive the EDID data that burning program 3 sends over and is written in the coupled interface memory 41,42 by SCL clock line 411,431 and SDA data line 412,432.
As shown in Figure 3, the present invention utilizes PC computing machine 1, cd-rom recorder 2, burning program 3 EDID to be burnt in the interface memory 41,42 of LCD 4, the parallel port 11 of cd-rom recorder 2 one ends and PC computing machine 1 electrically connects, cd-rom recorder 2 other ends link to each other with the analog signal interface 41 of LCD 4 by a signal wire 5, MCU in the main control chip 42 (single-chip microcomputer) software receives all EDID data from analog signal interface 41, and leaves in respectively after the EDID data of each interface are analyzed in the corresponding interface memory in 41 or 42.
The process step of many interfaces EDID data burning method of the present invention is as follows:
A, burning program send the burning instruction to LCD MCU software and prepare burning EDID data, defining hexadecimal burning order format is: 0x6E 0x51 Length 0x01 0xFE 0xE1 0xA5 0x03 0x00, and wherein Length represents to send the length of data;
B, LCD MCU software is replied the sexadecimal information of 2 bytes of passback, first byte representation LCD analog signal interface type of memory wherein, its type has two kinds of EEPROM and FLASH: definition 0x01 represents EEPROM, 0x02 represents FLASH, second kind of interface and the interface quantity that the byte representation LCD is all, the VGA1 of definition hexadecimal code corresponding respectively expression LCD from a high position to the low level, VGA2, DVI1, DVI2, HDMI1, HDMI2, DP1 (Display Port), the DP2 interface, represent in the LCD not this interface with 0, represent that with 1 this interface is arranged in the LCD;
C, burning program are determined the writing mode of EDID data according to 2 byte hexadecimal information of LCD MCU software passback: when LCD analog signal interface storer is the EEPROM type, adopt IIC (Inter-Integrated Circuit is the I2C bus) communication modes direct burning EDID data; When LCD analog signal interface storer is the FLASH type, adopt DDC/CI (DisplayData Channel Command Interface, DDC/CI communication protocol is based on a semiduplex communication protocol of IIC communication protocol) communication modes burning EDID data, its 128 byte EDID data are divided four transmissions, each 32 bytes that send, the order format of its DDCCI communication modes is defined as: 0x6E 0x51 Length 0x03 0xFE 0xEB 0x20 BlockNo Byte1 Data, wherein Length represents that this sends the length of data, BlockNo represents current for which time sends the EDID data, and Byte1 represents the current EDID data will send to which interface of LCD;
After D, LCD analog signal interface storer EDID data burning are finished, burning program receives the LCD back information and judges whether transmission is successful, definition back information ACK is that 0X01 represents to send successfully, and whether the LCD interface memory EDID data that burning program further reads burning when sending are successfully compared the detection burning qualified; ACK is that 0x00 represents that transmission is unsuccessful, and burning program showed defective information when transmission was unsuccessful;
After E, LCD analog signal interface storer EDID data burning are qualified, also has other kinds class interface as LCD, burning program continues to adopt DDCCI communication modes burning EDID data, its 128 byte EDID data are divided four transmissions, each 32 bytes that send, the order format of its DDCCI communication modes is defined as: 0x6E 0x51 Length 0x03 0xFE 0xEB 0x20 BlockNo Byte1 Data, and wherein: BlockNo represents which time sends the EDID data when current; Byte1 represents the current EDID data will send to which interface of LCD; Do not had other kinds class interface as LCD, then finished burning;
After F, all LCD interface memory EDID data burnings are finished, burning program receives the LCD back information and confirms whether burning is successful, definition back information ACK is that 0X01 represents the burning success, and burning program shows qualified information during the burning success; ACK is that 0x00 represents that burning is unsuccessful, and burning program showed defective information when burning was unsuccessful.
Claims (3)
1. a plurality of interface structures of LCD, it is characterized in that: the I/O interface of the main control chip of its LCD is connected with the SCL clock line of two above LCD interface memories and SDA data line, and the MCU software in the main control chip is by the EDID data of above-mentioned connecting circuit direct read burning LCD interface memory.
2. the EDID data burning method of a plurality of interface structures of LCD according to claim 1, it is characterized in that: its utilize PC computing machine, cd-rom recorder, burning program with the EDID data burning in the LCD interface memory, cd-rom recorder one end and PC computer parallel port electrically connect, the cd-rom recorder other end links to each other with above-mentioned analog signal interface by a signal wire, LCD MCU software receives all EDID data from analog signal interface, and leaves in respectively in the corresponding interface memory after the EDID data that receive are analyzed.
3. the EDID data burning method of a plurality of interface structures of LCD according to claim 2 is characterized in that: the process step of its burning is as follows:
A, burning program send the burning instruction to LCD MCU software and prepare burning EDID data, defining hexadecimal burning order format is: 0x6E 0x51 Length 0x01 0xFE 0xE1 0xA5 0x03 0x00, and wherein Length represents to send the length of data;
B, LCD MCU software is replied the sexadecimal information of 2 bytes of passback, first byte representation LCD analog signal interface type of memory wherein, its type has two kinds of EEPROM and FLASH: definition 0x01 represents EEPROM, 0x02 represents FLASH, second kind of interface and the interface quantity that the byte representation LCD is all, the VGA1 of definition hexadecimal code corresponding respectively expression LCD from a high position to the low level, VGA2, DVI1, DVI2, HDMI1, HDMI2, DP1, the DP2 interface, represent in the LCD not this interface with 0, represent that with 1 this interface is arranged in the LCD;
C, burning program are determined the writing mode of EDID data according to 2 byte hexadecimal information of LCD MCU software passback: when LCD analog signal interface storer is the EEPROM type, adopt IIC (Inter-Integrated Circuit is the I2C bus) communication modes direct burning EDID data; When LCD analog signal interface storer is the FLASH type, adopt DDC/CI (DisplayData Channel Command Interface, DDC/CI communication protocol is based on a semiduplex communication protocol of IIC communication protocol) communication modes burning EDID data, its 128 byte EDID data are divided four transmissions, each 32 bytes that send, the order format of its DDCCI communication modes is defined as: 0x6E 0x51 Length 0x03 0xFE 0xEB 0x20 BlockNo Byte1 Data, wherein Length represents that this sends the length of data, BlockNo represents current for which time sends the EDID data, and Byte1 represents the current EDID data will send to which interface of LCD;
After D, LCD analog signal interface storer EDID data burning are finished, burning program receives the LCD back information and judges whether transmission is successful, definition back information ACK is that 0X01 represents to send successfully, and whether the LCD interface memory EDID data that burning program further reads burning when sending are successfully compared the detection burning qualified; ACK is that 0x00 represents that transmission is unsuccessful, and burning program showed defective information when transmission was unsuccessful;
After E, LCD analog signal interface storer EDID data burning are qualified, also has other kinds class interface as LCD, burning program continues to adopt DDCCI communication modes burning EDID data, its 128 byte EDID data are divided four transmissions, each 32 bytes that send, the order format of its DDCCI communication modes is defined as: 0x6E 0x51 Length 0x03 0xFE 0xEB 0x20 BlockNo Byte1 Data, and wherein: BlockNo represents which time sends the EDID data when current; Byte1 represents the current EDID data will send to which interface of LCD; Do not had other kinds class interface as LCD, then finished burning;
After F, all LCD interface memory EDID data burnings are finished, burning program receives the LCD back information and confirms whether burning is successful, definition back information ACK is that 0X01 represents the burning success, and burning program shows qualified information during the burning success; ACK is that 0x00 represents that burning is unsuccessful, and burning program showed defective information when burning was unsuccessful.
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| CN102073614A (en) * | 2011-01-20 | 2011-05-25 | 珠海艾派克微电子有限公司 | Interface extending device and control method thereof |
| 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 |
| CN103412831A (en) * | 2013-08-23 | 2013-11-27 | 东莞市阳光信息科技有限公司 | Inspection monitoring system |
| 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 |
| CN104571942A (en) * | 2013-10-25 | 2015-04-29 | 三星电子株式会社 | Data storage system and method analyzing non-signal |
| CN106210588A (en) * | 2016-06-29 | 2016-12-07 | 乐视控股（北京）有限公司 | Interface allocation method and device |
| CN107888978A (en) * | 2017-10-26 | 2018-04-06 | 深圳创维－Rgb电子有限公司 | KEY codes method for burn-recording, device and computer-readable recording medium |
| CN109509416A (en) * | 2018-12-19 | 2019-03-22 | 惠科股份有限公司 | Display drive board and display device |
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| CN107888978A (en) * | 2017-10-26 | 2018-04-06 | 深圳创维－Rgb电子有限公司 | KEY codes method for burn-recording, device and computer-readable recording medium |
| CN107888978B (en) * | 2017-10-26 | 2020-08-28 | 深圳创维－Rgb电子有限公司 | KEY code burning method and device and computer readable storage medium |
| CN109509416A (en) * | 2018-12-19 | 2019-03-22 | 惠科股份有限公司 | Display drive board and display device |
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