CN1763705A - EDID data format switching device for image display - Google Patents
EDID data format switching device for image display Download PDFInfo
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- CN1763705A CN1763705A CN 200410083782 CN200410083782A CN1763705A CN 1763705 A CN1763705 A CN 1763705A CN 200410083782 CN200410083782 CN 200410083782 CN 200410083782 A CN200410083782 A CN 200410083782A CN 1763705 A CN1763705 A CN 1763705A
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Abstract
The invention discloses a display EDID data pattern switching device with DVI-I connecter, which comprises the following parts: first storage of digital EDID data, second storage of analog EDID data, communication channel, data pattern switching part and microcomputer, wherein the device reacts certain signal of microcomputer to select one data pattern from the first or second storage, which sends the result to the data pattern switching part in connection with the communication channel.
Description
Technical field
The present invention relates to a kind of image data presented form switching device shifter, specifically have the EDID data format switching device in the display of DVI-I connector.
Background technology
In general, when image player such as display are connected with computing machine, computing machine is by DDC (data playback channel (display data channel)) communication, receive display EDID (Extended Display Identification) data transmission, according to the EDID information that receives to the display output image frame of suitable display.
DDC is the communications conduit that is used to define between image player and the computing machine, special provision signal wire and the level thereof when between image player and computing machine, carrying out exchanges data.When the image player of supporting the DDC function was connected with computing machine, computing machine received image player by DDC and carries out plug and play (plug ﹠amp; Play) necessary EDID data the time, and the picture of optimum efficiency is provided to display according to these data.Record the information such as ID, sequence number of the style of playing display device, manufacturer, ultimate resolution, product in the above-mentioned EDID data message.
Fig. 1 is the formation block scheme of the display of the existing DVI-I of having connector.
With reference to Fig. 1, aforementioned display device 20 is the DVI-I connectors 21 that couple together by interface by with the data communication between display and the outer computer 10; The microcomputer 23 of the DDC communication of control linkage on above-mentioned DVI-I connector 21; Storing EDID memory of data 25 constitutes.
In above-mentioned this structure, when display 20 couples together with computing machine 10, communicate by letter with DDC between the computing machine 10 by microcomputer 23 control displays, be stored in the video card of EDID data transmission in the computing machine 10 in the above-mentioned storer 25, transmitted image by the video effect of suitable display to display afterwards.Here, as shown in Figure 1, DDC realizes its communications conduit function with two-wire (double line) form.
But the video signal input interface place on the DVI-I connector exists digital channel and analog channel respectively, and the passage of DDC has only one.Therefore, on existing display with DVI-I connector, a kind of data storage can only be arranged in storer 25 in simulation EDID data and the digital EDID data, and transmission in the computing machine 10 that connects afterwards.
Therefore, when if stored data layout is connected with the computing machine of supporting other categorical data form in the display memory 25, this computing machine is stored data layout in the interpretation display memory normally, and the environment for use of display can only be set by the basic style of display.For example, support simulation EDID data computing machine to be connected, or support digital EDID data computing machine to be connected with the display of only having stored simulation EDID data with the display of only having stored digital EDID data.
As mentioned above, in the prior art, data layout of supporting when computing machine and display stored data layout because computing machine interpretation normally goes out the data layout in the display, has caused the computing machine can not be to the display transmission best video picture of suitable display not simultaneously.
Summary of the invention
For solving existing problem in the above-mentioned prior art, the invention provides a kind of EDID data format switching device and changing method of video display, aim to provide a kind of device that the stored data layout of the data layout supported to the computing machine of display transmission and display is complementary.
Simultaneously, another object of the present invention is by this device provided by the invention, can transmit the best video image to display, and is not subjected to the constraint of the data layout that computing machine supports.
By the following elaboration detailed, can understand other purpose and advantage of the present invention to the present invention.
To achieve these goals, comprise according to video display EDID data format switching device provided by the present invention: the 1st storer of store digital EDID data; Store the 2nd storer of simulation EDID data; According to the data layout that outer computer is supported, the certain microcomputer of selecting signal of output; Certain selection signal of exporting is reacted a kind of in the data layout of selecting to be stored in above-mentioned the 1st storer or the 2nd storer, and the data layout switching part that is connected with the DDC communication port of the result that will select from above-mentioned microcomputer.
According to feature of the present invention, also comprise the DVI-I connector that computing machine and image display are linked to each other by interface in the preferred embodiment of the invention.
Simultaneously, according to feature of the present invention, in the preferred embodiment of the invention, above-mentioned EDID data layout switching part also should comprise reacts to certain selection signal of being exported from above-mentioned microcomputer, and output is selected the 1st storer or is selected the switch control part of the selection control signal of the 2nd memory data form to reach reacting from the selection control signal of above-mentioned switch control part output in view of the above, from the 1st storer and the 2nd storer, select a kind of data layout, and the switch portion that selected form is linked to each other with the DDC order wire.
In addition, according to feature of the present invention, in the preferred embodiment of the invention, above-mentioned switch portion comprises the 1st switch (SW1) that the 1st storer is connected with the DDC line; The 2nd switch (SW2) that the 2nd storer is connected with the DDC line.Above-mentioned the 1st switch and the 2nd switch are carried out the order that opens or closes to reacting from the selection signal of above-mentioned switch control part output.
According to the present invention, can realize not being subjected to the constraint of the data layout that the computing machine that is connected with the display with DVI-I connector supports, to the suitable EDID data layout of computing machine transmission.
Therefore, the above-mentioned computing machine that is connected with display can correctly be discerned the data of display EDID in any environment, to the video pictures of display transmission optimum efficiency.
Description of drawings
Fig. 1 is existing formation block scheme with display of DVI-I connector.
Fig. 2 is according in the preferred embodiment provided by the present invention, has the formation block scheme of the display of DVI-I connector.
Accompanying drawing major part symbol description:
10: computing machine
100: display
The 101:DVI-I connector
102: microcomputer
104: the 1 storeies
106: the 2 storeies
110: the data layout switching part
112: switch portion
114: the switch control part
Embodiment
Below with reference to accompanying drawings the preferred embodiment of the invention is elaborated.
Fig. 2 is according in the preferred embodiment provided by the present invention, has the formation block scheme of the display of DVI-I connector.
With reference to Fig. 2, aforementioned display device 100 comprises and adapts to the numerical data that outer computer 10 supported and the DVI-I connector 101 of simulated data; By above-mentioned DVI-I connector be connected with computing machine with the DDC communication port, control computer 10 communicates by letter with DDC, and according to user's setting output A D select the microcomputer 102 of signal; The 1st storer 104 of store digital EDID data; Store the 2nd storer 106 of simulation EDID data; According to from the A of above-mentioned microcomputer 102 outputs D select signal, from the 1st storer 104 and the 2nd storer 106, select a kind of data layout and the data layout switching part 110 that it is connected with the DDC communication port.
Storage recommendations among the present invention is used EEPROM non-volatility memorizers such as (electricallyerasable ROM (EEROM)s).
Above-mentioned A D to select signal be to decide according to the data layout that computing machine is supported.In the present embodiment, the user sets by the particular key input.
Above-mentioned data layout switching part 110 is by the switch portion 112 of the 2nd switch 112b that comprises the 1st switch 112a that the 1st storer 104 is connected with the DDC passage and the 2nd storer 106 is connected with the DDC passage; According to the A of input from above-mentioned microcomputer 102 D select signal, open or close the switch control part 114 of the 1st switch 112a or the 2nd switch 112b and form.According to the switch situation of above-mentioned the 1st switch 112a and the 2nd switch 112b, select above-mentioned the 1st storer 104 or the 2nd storer 106, and above-mentioned the 1st storer 104 that will select or the 2nd storer 106 are connected with above-mentioned DDC passage.
Above-mentioned switch control part 114 is made of the 1st impedance R1, the 2nd impedance R2, transistor Q.Wherein an end of the 1st impedance is connecting the 2nd switch 112b in above-mentioned microcomputer 102 and the above-mentioned switch portion; The base stage B of above-mentioned transistor links to each other with the other end of above-mentioned the 1st impedance, and the 1st a switch 112a in the collector C of transistor and the above-mentioned switch portion and an end of above-mentioned the 2nd impedance are connected the emitter E ground connection of transistor; The other end of the 2nd impedance is answered input high level, as 5 volts of voltages.
Below the principle of work of the display 100 that just as above constituted describe.
At first the data format information that the computing machine 10 that links to each other with display 100 of input is supported in above-mentioned microcomputer 102 promptly is transmission of digital data form or simulated data form.The data layout of aforementioned calculation machine 10 is to decide according to the style that the video card of built-in computer is supported.
After the computer data format information is imported above-mentioned microcomputer 102, if computing machine 10 and display 100 are connected by cable, carry out the SCL of DDC communication so, the SDA signal is by in the DDC passage input microcomputer 102.
If the aforementioned calculation machine is supported digital data format, above-mentioned microcomputer 102 just will export " low level (L) " A D select signal, according to this " low level (L) " A D select signal, the 2nd switch 112b in the switch portion closes, while is via the base stage of the 1st impedance R1 input crystal triode Q, at this moment, transistor Q closes, and to collector C output " high level (H) " signal, the 1st switch 112a in the switch portion opens like this, the DDC order wire is just connected with the 1st storer 104, the numerical data that stores in the 1st storer 104 is just transmitted to above-mentioned computing machine 10 by DVI-I connector 101, computing machine 10 just according to input digit EDID data message to the display transmission video pictures of suitable display, for display is set out best playing environment.
If aforementioned calculation machine 10 is supported the simulated data form, above-mentioned microcomputer 102 just will export " high level (H) " A D select signal, selection signal according to this " high level (H) ", the 2nd switch 112b in the switch portion opens, while is via the base stage of the 1st impedance R1 input crystal triode Q, at this moment, transistor Q opens, and to collector C output " low level (L) " signal, the 1st switch 112a in the switch portion closes like this, the DDC order wire is just connected with the 2nd storer 106, the simulated data that stores in the 2nd storer 106 just transfers to aforementioned calculation machine 10 by DVI-I connector 101, computing machine just according to input simulation EDID data message to the display transmission video pictures of suitable display, for display is set out best playing environment.
In an embodiment of the present invention, switch control part 114 has adopted the structure of two impedances and a transistor.But those of ordinary skill in the art can be formed in the identical scope the circuit of trickle part and make corresponding modification.
Those of ordinary skill in the art can carry out various change and modification fully in the scope that does not depart from this invention technological thought.Therefore, the technical scope of this invention is not limited to the content on the instructions, must determine its technical scope according to interest field.
Claims (4)
1, a kind of EDID data format switching device of video display comprises with the lower part:
The 1st storer of store digital EDID data;
Store the 2nd storer of simulation EDID data;
According to the data layout that outer computer is supported, the certain microcomputer of selecting signal of output;
Certain selection signal of exporting is reacted a kind of in the data layout of selecting to be stored in above-mentioned the 1st storer or the 2nd storer, and the data layout switching part that is connected with the DDC communication port of the result that will select from above-mentioned microcomputer.
2, the EDID data format switching device of video display as claimed in claim 1 is characterized in that, in the interface junction of above-mentioned video display and computing machine the DVI-I connector is arranged.
3, the EDID data format switching device of video display as claimed in claim 1, it is characterized in that, above-mentioned data layout switching part comprises reacts to certain selection signal of being exported from above-mentioned microcomputer, and exports the switch control part of selecting the 1st storer or selecting the selection control signal of the 2nd memory data form in view of the above; With to reacting from the selection control signal of above-mentioned switch control part output, from the 1st storer and the 2nd storer, select a kind of data layout, and the switch portion that selected form is linked to each other with the DDC order wire.
4, the EDID data format switching device of video display as claimed in claim 3 is characterized in that, above-mentioned switch portion comprises the 1st switch that the 1st storer is connected with the DDC line; With the 2nd switch that the 2nd storer is connected with the DDC line, above-mentioned the 1st switch and the 2nd switch are carried out the order that opens or closes to reacting from the selection signal of above-mentioned switch control part output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410083782 CN1763705A (en) | 2004-10-19 | 2004-10-19 | EDID data format switching device for image display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410083782 CN1763705A (en) | 2004-10-19 | 2004-10-19 | EDID data format switching device for image display |
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| Publication Number | Publication Date |
|---|---|
| CN1763705A true CN1763705A (en) | 2006-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410083782 Pending CN1763705A (en) | 2004-10-19 | 2004-10-19 | EDID data format switching device for image display |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329853B (en) * | 2007-06-20 | 2010-07-14 | 大同股份有限公司 | Portable recorder for EDID |
| CN101799503A (en) * | 2010-04-06 | 2010-08-11 | 福建捷联电子有限公司 | Method for uniformly testing DDC, HDCP and full screen picture on display |
| CN101393732B (en) * | 2007-09-18 | 2010-09-01 | 中强光电股份有限公司 | Interface device and method for writing spreading display recognition data |
| US8269785B2 (en) | 2007-07-27 | 2012-09-18 | Coretronic Corporation | Interface apparatus and method of writing extended display identification data |
| CN104464668A (en) * | 2014-12-09 | 2015-03-25 | 昆山龙腾光电有限公司 | Control circuit used for displayer |
| CN107728972A (en) * | 2016-08-12 | 2018-02-23 | 晨星半导体股份有限公司 | Display controller and its operating method |
| 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 |
| CN116074461A (en) * | 2023-03-01 | 2023-05-05 | 南京芯驰半导体科技有限公司 | Image frame sending and displaying method, device, component and traffic equipment |
-
2004
- 2004-10-19 CN CN 200410083782 patent/CN1763705A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329853B (en) * | 2007-06-20 | 2010-07-14 | 大同股份有限公司 | Portable recorder for EDID |
| US8269785B2 (en) | 2007-07-27 | 2012-09-18 | Coretronic Corporation | Interface apparatus and method of writing extended display identification data |
| CN101393732B (en) * | 2007-09-18 | 2010-09-01 | 中强光电股份有限公司 | Interface device and method for writing spreading display recognition data |
| CN101799503A (en) * | 2010-04-06 | 2010-08-11 | 福建捷联电子有限公司 | Method for uniformly testing DDC, HDCP and full screen picture on display |
| CN104464668A (en) * | 2014-12-09 | 2015-03-25 | 昆山龙腾光电有限公司 | Control circuit used for displayer |
| CN107728972A (en) * | 2016-08-12 | 2018-02-23 | 晨星半导体股份有限公司 | Display controller and its operating method |
| 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 |
| CN116074461A (en) * | 2023-03-01 | 2023-05-05 | 南京芯驰半导体科技有限公司 | Image frame sending and displaying method, device, component and traffic equipment |
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