CN1595353A

CN1595353A - Method for changing extended display identification data (EDID) in memory by using software program

Info

Publication number: CN1595353A
Application number: CN 03156574
Authority: CN
Inventors: 庄永顺
Original assignee: AAEON Technology Inc
Current assignee: AAEON Technology Inc
Priority date: 2003-09-09
Filing date: 2003-09-09
Publication date: 2005-03-16

Abstract

The present invention utilizes a software program to change and write EDID (VESA Extended Display Identification Data) into a memory chip through program control. By using the software program, the EDID can be changed without unplugging the chip, so that a video graphics array controller (VGAcontroller) can light up liquid crystal display panels (LCD Panel - Liquid Crystal Display Panel) of different brands.

Description

Use the method for extending display identification data (EDID) in the software program change internal memory

Technical field

The present invention a kind ofly can upgrade (update) a kind of method to the memory chip that write with extending display identification data (EDID).Especially refer to a kind ofly see through that software is program control will to be extended the display identification data renewal and write, and internal memory must not pulled up a kind of method of replacing.

Background technology

Each liquid crystal screen display all has it to extend display identification data (EDID), extending display identification data (EDID) is a kind of industrywide standard that VESA organizes to set up, this identification data is put down in writing all opering characteristics of electric apparatus of relevant display module, its purpose provides a kind of communications protocol of computer system at transmission display data channel (DDC), make identification specification that computer system can be correct, obtain correct signal with the controlling and driving panel of LCD.And extend display identification data in the industry cycle in, normally be stored in the electric current Erasable ﹠Programmable ROM (EEPROMElectrically Erasable Programmable Read-Only Memory), this ROM (read-only memory) then is fixed on the motherboard, that is single motherboard only has single extension display identification data, if when changing different liquid crystal screen display panels, very possible because extend not matching of display identification data, and the situation that causes panel of LCD not light, or can't demonstrate distinctive setting of this label panel of LCD or effect.If not change the motherboard that tool stores the internal memory of the extension display identification data that can mate this moment, be this to be stored the internal memory that extends display identification data take off the burned extension display identification data that mates; If finely tune the thin portion parameter setting of this liquid crystal screen display panel, also internal memory must be taken off burned this internal memory of the extension of displaying identified data file that will edit each parameter setting again, be inconvenient really, and cost of idleness and time.

I think and this invention eventually promptly to this phenomenon thinking solution, can see through program control extension display identification data, to solve the above problems.

Summary of the invention

Fundamental purpose of the present invention provides a kind of method, is to utilize software will extend in the display identification data write memory, and will internal memory does not take off and reach change and extend display identification data.

According to above-mentioned purpose, software program of the present invention is to see through System Management Bus (SMBus SystemManagement Bus or I2C is bus) LCD visual graphic array controller (LCD VGAcontroller) is got in touch, and from electric current Erasable ﹠Programmable ROM (EEPROM ElectricallyErasable Programmable Read-Only Memory) the extension display identification data of the corresponding display device of access (display device), this software has a plurality of default available settings of extension of displaying identified data file, and increase the extension of displaying identified data file that uses other specific standard newly, and make the edit-modify of thin portion parameter at each archives.And can see through this program, and select the extension of displaying identified data file of coupling to be stored in this ROM (read-only memory), make computer system can obtain opering characteristic of electric apparatus data and correct this liquid crystal screen display panel of control.This method comprises the following step:

(1) carry out this software program, test chip also activates writing mechanism;

The extension of displaying identified data file of (2) selection coupling;

(3) carry out write activity, close writing mechanism.

Desire to reach aforementioned purpose for making your juror of office can understand the present invention really, and the required technological means that possesses, describe in detail for an embodiment now as after, sincerely see also.

Description of drawings

Fig. 1 is the hardware environment of the embodiment of the invention.

Fig. 2 is the method flow of the embodiment of the invention.

Fig. 3 is the operation-interface window picture of the embodiment of the invention.

Fig. 4 is the window picture of the embodiment of the invention when updating files.

In the accompanying drawing:

21-judges chipset

23-opens writing mechanism

25-will extend display identification data and write

27-closes writing mechanism

The option of 32-standard 800*600 picture

The option of 34-standard 1024*768 Duel pixel picture

22-reads SMBus and GPIO data

24-selects the extension of displaying identified data file of coupling

The 26-debug

The option of 31-standard 640*480 picture

The option of 33-standard 1024*768 Single pixel picture

Other option of 35-

Embodiment

See also Fig. 1, LCD visual graphic array controller (LCD VGA controller) is the System Management Bus (SMBusor I2CBus) that sees through itself digitized video output interface (Digital Video Output Interface) the extension display identification data that comes the corresponding display module of access obtaining the initialization data lighting suitable panel of LCD, extends display identification data and just can wait each project to control different panel of LCD at the brightness adjustment by changing.

Consult Fig. 2 again, be program control flow process of software of the present invention and operation-interface window, whether this program detecting chipset (chip set) earlier is VIA686B or Intel815 21, read GPIO data (GeneralPurpose Control Register Base) and system management input/output bus data (SMBus I/OBase) 22 then, after obtaining above-mentioned data, can activate writing mechanism 23, select the extension of displaying identified data file 24 of coupling this moment, selected extension of displaying identified data file is write 25, and execution debug 26, correctly then close writing mechanism 27, mistake is then got back to write step 25.

Consult Fig. 3 again, it is the operation-interface window picture of software program of the present invention, there are a plurality of default recognition data files available in this window, comprise standard 640*480 picture 31, standard 800*600 picture 32, standard 1024*768

Single pixel picture

33 and 34, also can select other bin shelves by other option 35, behind the extension of displaying identified data file of selected and liquid crystal screen display coupling, software of the present invention just can be stored in the recognition data file in the internal memory, this moment, the software window picture can show the filename and the storage progress of storage, as shown in Figure 4.

Wherein extend display identification data and comprise many thin portions parameter, can adjust for setting, as address 15h is that maximal value, the address 17h of the horizontal image size of definition then defines and show the Gamma value that transmits etc., these parameter data all are contained in the bin archives, as adjusting each pre-set parameter, after promptly editor revises these bin shelves and stores, can select to write the extension display identification data file that edit-modify is crossed by other option 35 of above-mentioned software interface.

So, need not take off internal memory and can change and extend display identification data and differentiate for computer system and use lighting the panel of LCD of various labels, and carefully portion adjusts each parameter of editor, reaches with slotting promptly apparent (Plug ﹠amp; Display) function.

The above only is preferred embodiment of the present invention, when can not with qualification scope of the invention process, promptly the equalization of being done according to the present patent application claim generally changes and modifies, and all should still belong in the scope that patent of the present invention contains.

Claims

1. A method for using a software program to change the extended display identification data in the internal memory, characterized in that the software program selects a matching data file through the user interface, wherein the selectable files include a plurality of preset extended display identification data Documents and other files that can be added by themselves, this method includes the following steps:

(1) Execute the software program, test the chip and activate the writing mechanism;

(2) Select the matching extended display identification data file;

(3) Execute the writing action and close the writing mechanism.

2. The method for modifying the extended display identification data in the memory by using a software program as claimed in claim 1, characterized in that the optional self-added files are files provided by different brands.

3. The method of using a software program to modify the extended display identification data in the internal memory according to claim 1, wherein the optional self-added file is a file for editing and modifying detailed parameter settings.