CN103810982B - There is the EDID method for burn-recording of the display of multiple video port - Google Patents
There is the EDID method for burn-recording of the display of multiple video port Download PDFInfo
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Abstract
A kind of EDID method for burn-recording with the display of multiple video port, it is before SMD piece, when display program code is burnt to display flash memory, in the lump by corresponding with each video port and have invalid sequence number and inspection and an EDID be burnt to flash memory.When display MCU receives write EDID order and display sequence number on a production line, each EDID stored in flash memory reads by MCU, first the sequence number received is replaced sequence number invalid in an EDID to produce the 2nd EDID, calculate again each the 2nd EDID inspection and, then by the inspection calculated with to replace in the 2nd EDID invalid inspection and to produce the 3rd EDID, and each the 3rd EDID is burnt to flash memory or EEPROM corresponding to each video port.Therefore, EDID that the present invention expends transmit and modification time shorter, EDID recordable time can be shortened, improve production capacity and reduce costs.
Description
Technical field
The present invention relates to the EDID burning field of display, particularly relate to the EDID method for burn-recording of the display with multiple video port.
Background technology
EDID(ExtendedDisplayIdentificationData, extension of displaying identified data) be a kind of by display be provided for describing the data that it supports video source ability.The information such as EDID includes manufacturer's identification code, product ID, sequence number, manufacturing time, maximum display size, gamma value, color are arranged, the resolution of frequency limitation and support.Computing machine or other external device (ED), after being connected with display, can being learnt by the reading EDID stored in the display and its ability supporting video source make it be able to normal display video to export suitable vision signal to display.If display has multiple video port, then each video port all need burning corresponding EDID in display.Such as, if display has VGA(VideoGraphicsArray, video and graphic array) port, DVI(DigitalVideoInterface, digital visual interface) port and HDMI(HighDefinitionMultimediaInterface, HDMI (High Definition Multimedia Interface)) port, then need burning to have the EDID(corresponding with VGA port in display or be called the EDID of VGA), the EDID(corresponding with DVI port or be called the EDID of DVI) and with HDMI port corresponding EDID(or be called the EDID of HDMI).
For the display with multiple video port, to have the display of VGA port, DVI port and HDMI port, a kind of existing EDID method for burn-recording is connected with VGA port by VGA line by burning device (as being provided with the computing machine of EDID burning program), is connected and is connected with HDMI port by HDMI wire by DVI line with DVI port, and then the EDID of VGA, DVI and HDMI is burnt to display respectively by VGA, DVI and HDMI connecting line by burning device.But this method, when display video port number is many, can expend the too many time in the connection operation of burning device and display video port.
Another kind of existing EDID method for burn-recording is then by means of only the video port connection corresponding with display of a connecting line by burning device (as computing machine), such as be connected with VGA port by VGA line, then the EDID of VGA is burnt to display by VGA line by burning device, burning device also passes through VGA line, to transmit the mode of order, the MCU(MicroControllerUnit of order display, microcontroller) EDID of burning DVI, and the EDID content of DVI is the content after this order, burning device sends EDID content by pen, MCU writes EDID by pen, the EDID of MCU burning HDMI is ordered again after the EDID write completing DVI, writing mode is with the EDID of DVI.Although this method shortens the connection activity duration of burning device and video port, the EDID content being through order transmission DVI and HDMI still needs to expend certain delivery time.
Summary of the invention
Object of the present invention, at a kind of EDID method for burn-recording with the display of multiple video port of proposition, can shorten the time of EDID burning.
The present invention proposes a kind of EDID method for burn-recording with the display of multiple video port, it is at SMD(Surface-MountDevice, surface sticking assembly) before piece, when the program code of display is burnt to the flash memory of display, in the lump an EDID corresponding with each video port is burnt to flash memory, the sequence number in a described EDID is invalid with inspection and (checksum).When the MCU of display receives the sequence number of write EDID order and display on a production line, each EDID stored in flash memory reads by MCU, first the sequence number received is replaced sequence number invalid in an EDID to produce the 2nd EDID, calculate again each the 2nd EDID inspection and, then by invalid inspection in the inspection calculated and replacement the 2nd EDID with to produce the 3rd EDID, and each the 3rd EDID is burnt to flash memory or EEPROM(ElectricallyErasableProgrammableRead-OnlyMemory corresponding to each video port, electrically-erasable programmable read-only memory (EEPROM)).
In an embodiment of the present invention, after the EEPROM that the flash memory or each video port that each the 3rd EDID are burnt to display are corresponding, also can read storage the 3rd EDID in the display to check its correctness by external device (ED).When the MCU of display receives the reading EDID order that the external device (ED) that is connected with display sends, each the 3rd EDID stored in flash memory or EEPROM corresponding to each video port can read by MCU, and be sent to external device (ED) with check sequence number in the 3rd EDID and inspection and correctness.
The present invention is because adopting before SMD piece, when the program code of display is burnt to the flash memory of display, in the lump by an EDID(corresponding with each video port sequence number and inspection wherein and be invalid) be burnt to flash memory, when being then about on a production line carry out EDID burning, only need the sequence number transmitting write EDID order and display to display, therefore the delivery time that an EDID and required sequence number are being sent to spent by display by it is shorter, in addition, when EDID burning, display according to the sequence number received the one EDID modified to generation the 3rd EDID(sequence number and inspection wherein and be effective) after again burning in wherein, therefore it is to revise out the modification time for spent by the 3rd EDID corresponding with each video port of burning shorter, therefore, the present invention can shorten the time of EDID burning, improve production capacity and reduce costs.
In order to allow, the present invention is above-mentioned can be become apparent with other objects, features and advantages, preferred embodiment cited below particularly, and coordinates institute's accompanying drawings, is described in detail below.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram with the display of multiple video port according to one embodiment of the invention.
The process flow diagram of the EDID method for burn-recording that Fig. 2 is display shown in Fig. 1.
Fig. 3 is the circuit block diagram with the display of multiple video port according to another embodiment of the present invention.
The process flow diagram of the EDID method for burn-recording that Fig. 4 is display shown in Fig. 3.
[primary clustering symbol description]
1: display
11：MCU
12: flash memory
13a:VGA port
13b:DVI port
13c:HDMI port
14a～14c：EEPROM
S21, S41: program code and an EDID corresponding with video port are all burnt to flash memory
S22, S42: whether receive write EDID order and sequence number
S23, S43: the sequence number received is kept in variable SN, the numerical value of count value N resets to 1
S24, S44: read an EDID corresponding with N number of video port, replace invalid sequence number in an EDID with variable SN content and produce the 2nd EDID, then calculate this 2nd EDID inspection and to replace in the 2nd EDID invalid inspection and to produce the 3rd EDID
S25: the 3rd EDID is burnt to the EEPROM corresponding with N number of video port, the numerical value of count value N adds 1
S26, S46: the burn job whether having completed the 3rd EDID corresponding to last video port
S45: the 3rd EDID is burnt to flash memory, the numerical value of count value N adds 1.
Embodiment
Fig. 1 is the circuit block diagram with the display of multiple video port according to one embodiment of the invention.Refer to Fig. 1, display 1 comprises MCU11, flash memory 12, multiple video port 13a ~ 13c and multiple EEPROM14a ~ 14c corresponding with video port 13a ~ 13c.MCU11, for controlling the running of display 1, controls its burn job flow process when being included in EDID burning.Flash memory 12 is for storing the program code of display 1, such as hardware drive program code and tool software program code, so that MCU11 load and execution controls the running of display 1, and store an EDID corresponding with each video port 13a ~ 13c, sequence number and inspection in a described EDID and be invalid.Video port 13a ~ 13c is respectively used to receiving video signals.EEPROM14a ~ 14c is respectively used to store three EDID corresponding with video port 13a ~ 13c, sequence number and inspection in described 3rd EDID and be effective.
In the present embodiment, video port 13a ~ 13c is respectively VGA port one 3a, DVI port one 3b and HDMI port one 3c, is respectively used to receive VGA signal, DVI signal and HDMI signal.EEPROM14a ~ 14c is respectively used to store three EDID corresponding with VGA port one 3a, DVI port one 3b and HDMI port one 3c, the following describes and is referred to as with the 3rd VGAEDID, the 3rd DVIEDID and the 3rd HDMIEDID respectively.And be stored in an EDID corresponding with VGA port one 3a, DVI port one 3b and HDMI port one 3c in flash memory 12, the following describes and be referred to as with a VGAEDID, a DVIEDID and a HDMIEDID respectively.
The process flow diagram of the EDID method for burn-recording that Fig. 2 is display 1 shown in Fig. 1.Please simultaneously see Fig. 1 and Fig. 2, in the volume production process of the display 1 of same type, before SMD piece, when the display program code burning stage, operator by IC(IntegratedCircuit, integrated circuit) program code of display 1 is burnt to the flash memory 12(step S21 of display 1 by cd-rom recorder (Fig. 1 does not show) in the lump together with a VGAEDID corresponding with VGA port one 3a, DVI port one 3b and HDMI port one 3c, a DVIEDID and a HDMIEDID).Because display 1 its manufacturer and product type etc. of same type are all identical, to make in its EDID only sequence number and inspection and can be different, therefore when the program code burning stage with in a VGAEDID of program code in the lump burning, a DVIEDID and a HDMIEDID except sequence number and inspection with except all the other contents all identical, and sequence number and inspection wherein and be invalid.In one embodiment, the data in flash memory 12 can only be write position as logical zero by logical one, then must to erase whole block to be become logical one by logical zero, so time the one EDID in sequence number and inspection and each position be all necessary for logical one.
On a production line, when the recording display EDID stage, burning device (as being provided with the computing machine of EDID burning program) is connected with corresponding video port by a connecting line by operator, such as be connected with VGA port one 3a by VGA line, then operator is only needed to operate burning device and sends the sequence number of write EDID order and display 1 to be sent to the MCU11 of display 1 by VGA line.MCU11 is when judging the sequence number receiving write EDID order and display 1 (step S22), and the sequence number received is kept in variable SN by MCU11, and the numerical value of count value N is reset to 1(step S23), then start the burning performing EDID.
In the burn job of EDID, first, the EDID corresponding with N number of video port stored in flash memory 12 reads by MCU11, first variable SN content (it is the sequence number received) is replaced sequence number invalid in an EDID to produce the 2nd EDID, calculate again this 2nd EDID inspection and, then by the inspection calculated with to replace in the 2nd EDID invalid inspection and to produce the 3rd EDID, sequence number and inspection in this 3rd EDID and be effectively (step S24).Then, this 3rd EDID is burnt to the EEPROM corresponding with N number of video port by MCU11, and the numerical value of count value N is added 1(step S25).Finally, MCU11 judges whether according to the numerical value of current count value N the burn job (step S26) completing the 3rd EDID corresponding to last video port, if then terminate the burn job of EDID, then return if not and perform step S24, S25 and S26 again to carry out the burn job of the 3rd EDID corresponding to next video port.
Specifically, display 1 has 3 video ports, and wherein the 1st video port is VGA port one 3a, and the 2nd video port is DVI port one 3b, and the 3rd video port is HDMI port one 3c.In the burn job of EDID, the numerical value of count value N is 1 at the beginning, the VGAEDID corresponding with the 1st video port (i.e. VGA port one 3a) stored in flash memory 12 first reads by MCU11, and the sequence number received is replaced sequence number invalid in a VGAEDID to produce the 2nd VGAEDID, calculate again this 2nd VGAEDID inspection and, then by the inspection calculated and to replace in the 2nd VGAEDID invalid inspection and to produce the 3rd VGAEDID(step S24).Then, this 3rd VGAEDID is burnt to and the 1st EEPROM14a that video port is corresponding by MCU11, and the numerical value of count value N is added 1, and now the numerical value of count value N becomes 2(step S25).Then, MCU11 is 2 burn job (step S26) judging not yet to complete the 3rd EDID corresponding to last video port according to the numerical value of current count value N, therefore returns and perform step S24, S25 and S26 again to carry out the burn job of the 3rd EDID corresponding to next video port (i.e. the 2nd video port).
When carrying out the burn job of the 3rd EDID corresponding to the 2nd video port, the numerical value of count value N is 2, the DVIEDID corresponding with the 2nd video port (i.e. DVI port one 3b) stored in flash memory 12 first reads by MCU11, and the sequence number received is replaced sequence number invalid in a DVIEDID to produce the 2nd DVIEDID, calculate again this 2nd DVIEDID inspection and, then by the inspection calculated and to replace in the 2nd DVIEDID invalid inspection and to produce the 3rd DVIEDID(step S24).Then, this 3rd DVIEDID is burnt to and the 2nd EEPROM14b that video port is corresponding by MCU11, and the numerical value of count value N is added 1, and now the numerical value of count value N becomes 3(step S25).Then, MCU11 is 3 burn job (step S26) judging not yet to complete the 3rd EDID corresponding to last video port according to the numerical value of current count value N, therefore returns and perform step S24, S25 and S26 again to carry out the burn job of the 3rd EDID corresponding to next video port (i.e. the 3rd video port).
When carrying out the burn job of the 3rd EDID corresponding to the 3rd video port, the numerical value of count value N is 3, the HDMIEDID corresponding with the 3rd video port (i.e. HDMI port one 3c) stored in flash memory 12 first reads by MCU11, and the sequence number received is replaced sequence number invalid in a HDMIEDID to produce the 2nd HDMIEDID, calculate again this 2nd HDMIEDID inspection and, then by the inspection calculated and to replace in the 2nd HDMIEDID invalid inspection and to produce the 3rd HDMIEDID(step S24).Then, this 3rd HDMIEDID is burnt to and the 3rd EEPROM14c that video port is corresponding by MCU11, and the numerical value of count value N is added 1, and now the numerical value of count value N becomes 4(step S25).Then, MCU11 is 4 burn job (step S26) judging to complete the 3rd EDID corresponding to last video port according to the numerical value of current count value N, therefore terminates the burn job of EDID.
Fig. 3 is the circuit block diagram with the display of multiple video port according to another embodiment of the present invention.Refer to Fig. 3, with the difference of display 1 shown in Fig. 1, display 3 is that display 3 does not comprise EEPROM14a ~ 14c, this is because the flash memory 12 of display 3 is except the program code for storing display 3 in advance and an EDID corresponding with each video port 13a ~ 13c, its also after EDID burning completes for storing three EDID corresponding with video port 13a ~ 13c to replace an EDID.
The process flow diagram of the EDID method for burn-recording that Fig. 4 is display 3 shown in Fig. 3.Please simultaneously see Fig. 3 and Fig. 4, in the volume production process of the display 3 of same type, before SMD piece, when the display program code burning stage, the program code of display 3 is burnt to the flash memory 12(step S41 of display 3 by IC cd-rom recorder (Fig. 3 does not show) by operator in the lump together with a VGAEDID corresponding with VGA port one 3a, DVI port one 3b and HDMI port one 3c, a DVIEDID and a HDMIEDID).Because display 3 its manufacturer and product type etc. of same type are all identical, to make in its EDID only sequence number and inspection and can be different, therefore when the program code burning stage with in a VGAEDID of program code in the lump burning, a DVIEDID and a HDMIEDID except sequence number and inspection with except all the other contents all identical, and sequence number and inspection wherein and be invalid.
On a production line, when the recording display EDID stage, burning device (as being provided with the computing machine of EDID burning program) is connected with corresponding video port by a connecting line by operator, such as be connected with VGA port one 3a by VGA line, then operator is only needed to operate burning device and sends the sequence number of write EDID order and display 3 to be sent to the MCU11 of display 3 by VGA line.MCU11 is when judging the sequence number receiving write EDID order and display 3 (step S42), and the sequence number received is kept in variable SN by MCU11, and the numerical value of count value N is reset to 1(step S43), then start the burn job performing EDID.
In the burn job of EDID, first, the EDID corresponding with N number of video port stored in flash memory 12 reads by MCU11, first variable SN content (it is the sequence number received) is replaced sequence number invalid in an EDID to produce the 2nd EDID, calculate again this 2nd EDID inspection and, then by the inspection calculated with to replace in the 2nd EDID invalid inspection and to produce the 3rd EDID, sequence number and inspection in this 3rd EDID and be effectively (step S44).Then, this the 3rd EDID is burnt to the flash memory 12 of display 3 by MCU11, preferably, only need invalid sequence number and inspection in the EDID that sequence number effective in the 3rd EDID and inspection and writing respectively is stored in flash memory 12 in advance and position, and the numerical value of count value N is added 1(step S45).Finally, MCU11 judges whether according to the numerical value of current count value N the burn job (step S46) completing the 3rd EDID corresponding to last video port, if then terminate the burn job of EDID, then return if not and perform step S44, S45 and S46 again to carry out the burn job of the 3rd EDID corresponding to next video port.
In addition, after EEPROM14a ~ 14c that each video port 13a ~ 13c of the flash memory 12 or display 1 that each the 3rd EDID are burnt to display 3 is corresponding, also can read the 3rd EDID that is stored in display 3 or 1 to check its correctness by external device (ED) (as being provided with the computing machine of scrutiny program).MCU11 once display 3 or 1 receives the reading EDID order that the external device (ED) that is connected with display 3 or 1 is sent, each the 3rd EDID stored in flash memory 12 or EEPROM14a ~ 14c corresponding to each video port 13a ~ 13c can read by MCU11, and be sent to external device (ED) with check sequence number in the 3rd EDID and inspection and correctness.
Although the present invention discloses as above with preferred embodiment; so it is not intended to limit the present invention, anyly has the knack of this those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little change and retouching, therefore protection scope of the present invention is when being as the criterion depending on those as defined in claim.
Claims (2)
1. there is an EDID method for burn-recording for the display of multiple video port, comprising:
Before SMD piece, when the program code of display is burnt to the flash memory of display, in the lump an EDID corresponding with each video port is burnt to flash memory, sequence number and inspection in a described EDID and be invalid;
On a production line, connected by burning device by a connecting line with the corresponding video port of display, when the MCU of display receives the sequence number of write EDID order and display, MCU starts to perform the following step after the numerical value of count value N is reset to 1:
A, the EDID corresponding with N number of video port stored in flash memory to be read, first the sequence number received is replaced sequence number invalid in an EDID to produce the 2nd EDID, calculate again the 2nd EDID inspection and, then by the inspection calculated with to replace in the 2nd EDID invalid inspection and to produce the 3rd EDID;
B, the 3rd EDID is burnt to flash memory or the EEPROM corresponding with N number of video port, and the numerical value of count value N is added 1; And
C, judge whether according to the numerical value of current count value N the burn job completing the 3rd EDID corresponding to last video port, if then terminate, then return described step a if not.
2. there is the EDID method for burn-recording of the display of multiple video port as claimed in claim 1, more comprise:
When the MCU of display receives the reading EDID order that the external device (ED) that is connected with display sends, each the 3rd EDID stored in flash memory or EEPROM corresponding to each video port reads by MCU, and be sent to external device (ED) with check sequence number in the 3rd EDID and inspection and correctness.
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Effective date of registration: 20171227 Address after: Beijing Beijing economic and Technological Development Zone No. 106 No. three road Patentee after: AOC display technology (China) Co., Ltd. Address before: Chinese No. 108 Wai Yip Street, Kwun Tong Kowloon Hongkong Sibao International Building 12 floor 1208-16 room Patentee before: Guanjie Investment Co., Ltd. |
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