CN103345915A - Method capable of automatically adapting to EDID digital-to-analogue display conversion - Google Patents
Method capable of automatically adapting to EDID digital-to-analogue display conversion Download PDFInfo
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- CN103345915A CN103345915A CN2013101774700A CN201310177470A CN103345915A CN 103345915 A CN103345915 A CN 103345915A CN 2013101774700 A CN2013101774700 A CN 2013101774700A CN 201310177470 A CN201310177470 A CN 201310177470A CN 103345915 A CN103345915 A CN 103345915A
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Abstract
The invention, which belongs to a signal display conversion method field, discloses a method capable of automatically adapting to extended display identification data (EDID) digital-to-analogue display conversion. The structure is characterized in that a digital-to-analogue signal conversion module and a control module are arranged and are connected with each other; and the control module is also connected with an electrically erasable programmable read-only memory (EEPROM). The method comprises the following steps that: firstly, the control module reads EDID data of an analog display and carries out EDID data conversion according to a digital interface type, so that an upper computer can read correct EDID data of the digital interface; secondly, the control module stores the converted EDID data into the EEPROM; and thirdly, the control module controls the digital-to-analogue signal conversion module to carry out conversion from a digital signal to an analog signal by using an D/A algorithm. According to the invention, compared with the prior art, the provided method has characteristics of stable performance and applicability of universality and the like.
Description
Technical field
The present invention relates to the method that a kind of signal shows conversion, specifically a kind of automatic adaptation EDID digital-to-analogue shows the method for conversion.
Background technology
In special computer fields such as industry control, national defence, the demand that exists a large amount of double screens and multi-screen simulation (VGA etc.) to show, and the scheme that the main flow display adapter mainly provides single analog and multiple digital to show can not satisfy the needs in this field.The numeral revolving die is intended showing and is mainly comprised: the visit and the format conversion that 1, show the control number; 2, digital signal is to the conversion of simulating signal; 3, the selection of signal conversion method, control such as enable.
At present, aspect self-adaptation demonstration conversion, also there are not comparatively ripe scheme and method.The method of Shi Xianing mainly contained following several in the past: 1, the fixing data message that shows, the signal conversion that control D/A comparatively fixes.This method can only be applicable to that the display of part and numeral show directly conversion, the possibility that existence can not show.2, have certain adaptive faculty, carry out the conversion of fixed signal form.This method can only be applicable to that a kind of interface is a kind of conversion of digital signal, can not be applicable to multi-purpose computer as a kind of method.
Summary of the invention
Technical assignment of the present invention is at above weak point, a kind of stable performance is provided, is suitable for the method that general a kind of automatic adaptation EDID digital-to-analogue shows conversion.
The technical solution adopted for the present invention to solve the technical problems is: comprise interconnected digital and analogue signals modular converter and control module, control module also connects EEPROM, the digital and analogue signals modular converter is finished the function that digital signal is converted to simulating signal, and control module is finished the function of EDID data-switching and the control function of logarithmic mode signal conversion module; The input end of digital and analogue signals modular converter is that digital signal, output terminal are simulating signal, and the input end of control module is that digital displaying data, output terminal show data for simulation;
The specific implementation step of described method is:
(1), control module surveys output terminal and whether inserts conformable display, if then jump to step (2), inserts state if not continuing the poll conformable display;
(2), control module surveys input end and whether inserts digital interface, if then jump to step (3), inserts state if not continuing the poll digital interface;
(3), control module reads the EDID data of conformable display, carries out the conversion of EDID data according to the type of digital interface, makes host computer can read the EDID data of correct digital interface;
(4), the EDID data after control module will be changed deposit EEPROM in;
(5), control module control digital and analogue signals modular converter adopts the D/A algorithm to carry out digital signal to the conversion of simulating signal.
Inner integrated signal input receiver module, channel selecting module and the TTL that connects successively of digital and analogue signals modular converter changes the VGA module, and signal input receiver module comprises TMDS receiver module, LVDS receiver module, TTL receiver module.
In the step (3), the conversion of EDID data comprises following EDID data: the EDID version information--make host computer adopt correct method to resolve EDID data, resolution information, level, vertical sync information, refresh rate information, proof test value.
In the step (5), digital signal comprises to the conversion of simulating signal:
(1), the TMDS signal changes the VGA signal, can carry out the conversion of DVI, HDMI digital interface signal;
(2), the LVDS signal changes the VGA signal, can use the conversion of LCD interface signal always;
(3), the TTL signal changes the VGA signal, can carry out the conversion of old LCD interface signal.
EDID, English full name Extended Display Identification Data is translated as the extending display identification data.Be a kind of VESA standard data format, wherein comprise the parameter of relevant monitor and performance thereof, comprise that supplier information, maximum image size, color setting, manufacturer pre-set, the character string of the restriction of frequency range and display name and sequence number.
EEPROM, English full name Electrically Erasable Programmable Read-Only Memory is translated as EEPROM (Electrically Erasable Programmable Read Only Memo).The storage chip that data are not lost after a kind of power down.
TMDS--Transition Minimized Differential signal, transition minimized differential signaling.
LVDS--Low-Voltage Differential Signaling low-voltage differential signal.
TTL--Transistor-Transistor Logic, i.e. transistor-transistor logic integrated circuit, mainly containing BJT(Bipolar Junction Transistor is bipolar junction transistor, transistor) and resistance constitute, have fireballing characteristics.
VGA--Video Graphics Array, Video Graphics Array, the computer display standard of use simulating signal.
A kind of automatic adaptation EDID digital-to-analogue of the present invention shows that the method for conversion compares with prior art, has reasonable in design, easy to use, stable performance, is suitable for characteristics such as general, thereby, have good value for applications.
Description of drawings
The present invention is further described below in conjunction with accompanying drawing.
Accompanying drawing 1 is that a kind of automatic adaptation EDID digital-to-analogue shows that the integral body of the method for conversion realizes function logic frame chart;
Accompanying drawing 2 is the digital and analogue signals modular converter internal logic block diagram that a kind of automatic adaptation EDID digital-to-analogue shows the method for conversion.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
A kind of automatic adaptation EDID digital-to-analogue of the present invention shows the method for conversion, its structure comprises interconnected digital and analogue signals modular converter and control module, control module also connects EEPROM, the digital and analogue signals modular converter is finished the function that digital signal is converted to simulating signal, and control module is finished the function of EDID data-switching and the control function of logarithmic mode signal conversion module; The input end of digital and analogue signals modular converter is that digital signal, output terminal are simulating signal, and the input end of control module is that digital displaying data, output terminal show data for simulation;
The specific implementation step of described method is:
(1), control module surveys output terminal and whether inserts conformable display, if then jump to step (2), inserts state if not continuing the poll conformable display;
(2), control module surveys input end and whether inserts digital interface, if then jump to step (3), inserts state if not continuing the poll digital interface;
(3), control module reads the EDID data of conformable display, carries out the conversion of EDID data according to the type of digital interface, makes host computer can read the EDID data of correct digital interface;
(4), the EDID data after control module will be changed deposit EEPROM in;
(5), control module control digital and analogue signals modular converter adopts the D/A algorithm to carry out digital signal to the conversion of simulating signal.
Inner integrated signal input receiver module, channel selecting module and the TTL that connects successively of digital and analogue signals modular converter changes the VGA module, and signal input receiver module comprises TMDS receiver module, LVDS receiver module, TTL receiver module.
In the step (3), the conversion of EDID data comprises following EDID data: the EDID version information--make host computer adopt correct method to resolve EDID data, resolution information, level, vertical sync information, refresh rate information, proof test value.
In the step (5), digital signal comprises to the conversion of simulating signal:
(1), the TMDS signal changes the VGA signal, can carry out the conversion of DVI, HDMI digital interface signal;
(2), the LVDS signal changes the VGA signal, can use the conversion of LCD interface signal always;
(3), the TTL signal changes the VGA signal, can carry out the conversion of old LCD interface signal.
A kind of automatic adaptation EDID digital-to-analogue of the present invention shows the method for conversion, except the described technical characterictic of instructions, is the known technology of those skilled in the art.
Claims (4)
1. one kind adapts to the method that the EDID digital-to-analogue shows conversion automatically, it is characterized in that comprising interconnected digital and analogue signals modular converter and control module, control module also connects EEPROM, the digital and analogue signals modular converter is finished the function that digital signal is converted to simulating signal, and control module is finished the function of EDID data-switching and the control function of logarithmic mode signal conversion module; The input end of digital and analogue signals modular converter is that digital signal, output terminal are simulating signal, and the input end of control module is that digital displaying data, output terminal show data for simulation;
The specific implementation step of described method is:
(1), control module surveys output terminal and whether inserts conformable display, if then jump to step (2), inserts state if not continuing the poll conformable display;
(2), control module surveys input end and whether inserts digital interface, if then jump to step (3), inserts state if not continuing the poll digital interface;
(3), control module reads the EDID data of conformable display, carries out the conversion of EDID data according to the type of digital interface, makes host computer can read the EDID data of correct digital interface;
(4), the EDID data after control module will be changed deposit EEPROM in;
(5), control module control digital and analogue signals modular converter adopts the D/A algorithm to carry out digital signal to the conversion of simulating signal.
2. a kind of automatic adaptation EDID digital-to-analogue according to claim 1 shows the method for conversion, it is characterized in that inner integrated signal input receiver module, channel selecting module and the TTL that connects successively of digital and analogue signals modular converter changes the VGA module, signal input receiver module comprises TMDS receiver module, LVDS receiver module, TTL receiver module.
3. a kind of automatic adaptation EDID digital-to-analogue according to claim 1 shows the method for conversion, it is characterized in that in the step (3), the conversion of EDID data comprises following EDID data: the EDID version information, resolution information, level, vertical sync information, refresh rate information, proof test value.
4. a kind of automatic adaptation EDID digital-to-analogue according to claim 1 shows the method for conversion, it is characterized in that digital signal comprises to the conversion of simulating signal in the step (5):
(1), the TMDS signal changes the VGA signal;
(2), the LVDS signal changes the VGA signal;
(3), the TTL signal changes the VGA signal.
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| CN201310177470.0A CN103345915B (en) | 2013-05-15 | 2013-05-15 | A kind of method of automatic adaptation EDID digital-to-analogue display conversion |
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| CN103345915B CN103345915B (en) | 2016-04-13 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH086683A (en) * | 1994-06-20 | 1996-01-12 | Nec Niigata Ltd | Personal computer |
| US20030090590A1 (en) * | 2001-11-09 | 2003-05-15 | Kazuhiko Yoshizawa | Video processing device |
| CN1592922A (en) * | 2002-09-11 | 2005-03-09 | 索尼株式会社 | Video display |
| 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 |
| CN102420966A (en) * | 2011-11-24 | 2012-04-18 | 中兴通讯股份有限公司 | Conference television video output EDID (Extended Display Identification Data) processing method and system |
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- 2013-05-15 CN CN201310177470.0A patent/CN103345915B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH086683A (en) * | 1994-06-20 | 1996-01-12 | Nec Niigata Ltd | Personal computer |
| US20030090590A1 (en) * | 2001-11-09 | 2003-05-15 | Kazuhiko Yoshizawa | Video processing device |
| CN1592922A (en) * | 2002-09-11 | 2005-03-09 | 索尼株式会社 | Video display |
| 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 |
| CN102420966A (en) * | 2011-11-24 | 2012-04-18 | 中兴通讯股份有限公司 | Conference television video output EDID (Extended Display Identification Data) processing method and system |
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