KR20070079492A - Display identification data managing method and update apparatus thereof - Google Patents

Abstract

A method for managing display ID information and an updating device thereof are provided to store an EDID(Extended Display ID Data) to more than one sub memory through one process without accessing additional equipment or each sub memory by enabling a controller of a sync device to access each sub memory and store the EDID to each sub memory. Each sub memory(141-143), which is an EEPROM(Electronically Erasable Programmable ROM), provides the stored EDID by directly connecting to a source device(200), which is a PC. The controller(110) receives the EDID by connecting to an external device providing the EDID and stores the received EDID to the sub memories while selectively connecting to the sub memories. The sub memories are included as many as the number of supported standard protocols and the EDID stored in each sub memory is different with each other. The standard protocol is a protocol supporting a DDC(Display Data Channel) protocol including D-sub, DVI(Digital Video Interface), and HMDI(High-Definition Multimedia Interface).

Description

Display IDENTIFICATION DATA MANAGING METHOD AND UPDATE APPARATUS THEREOF}

1 is a connection diagram between a source device and a sink device for displaying an image.

2 is a conceptual view illustrating a display unit identification information storage method.

3 is a conceptual diagram illustrating a display unit identification information storage method of a sink device supporting a plurality of communication standards.

Figure 4 is a block diagram showing the configuration of an embodiment of the present invention.

Figure 5 is a block diagram showing the configuration of another embodiment of the present invention.

Figure 6 is a block diagram showing the configuration of another embodiment of the present invention.

7 is a flowchart showing a display unit identification information management method according to an embodiment of the present invention.

8 is a flowchart showing a display unit identification information management method according to another embodiment of the present invention.

9 is a flowchart showing a display unit identification information management method according to another embodiment of the present invention.

*** Explanation of symbols for main parts of drawing ***

300: sink device 310: control unit

320: main memory unit 330: communication unit

340: switch unit 350: sub memory unit

351: first sub memory unit 352: second sub memory unit

353: third sub memory unit 400: source device

500: development equipment

The present invention relates to a display unit identification information management method and an update device, and more particularly, to a display unit identification information management method and an update device for effectively controlling the sub-memories for storing display unit identification information.

Recently, when a video display device such as a monitor or a digital television is connected with a computer or various host devices that can be connected to the video display device, the video display device and the host device communicate with each other through display data channel (DDC) communication. The identification information of the video display device, that is, the EDID (Extended Display IDentification Data) is transmitted so that an optimal screen can be displayed.

The DDC defines a communication channel between the video display device and the computer. In particular, the DDC is a protocol for defining signal lines and the procedures thereof when exchanging data between the video display device and the computer. When the video display device supporting the DDC function is connected to the most representative computer among the hosts supporting the DDC, the computer (more specifically, the computer and the operating system of the computer) is plugged from the video display device through DDC communication. The EDID required for Plug & Play is received, and the EDID is used to realize an optimal screen for a video display device (typically a monitor). The EDID includes information such as display unit specification, manufacturer, maximum resolution, product ID, serial number, and the like.

FIG. 1 illustrates a DDC communication connection state between a source device 10 used as a concept encompassing the host device and a sink device 20 used as a concept encompassing an image display device. As standard, D-Sub (analog RGB), DVI (Digital Video Interactive), HDMI (High-Definition Multimedia Interface), etc. are currently used.

The D-Sub uses analog RGB signals as a communication standard applied to most monitors, and the DVI enables high-speed serial digital video / control signal transmission between a source device operating as a graphics host and a sink device, which is a digital display device. HDMI is a standard that enables high-speed digital video / audio / control signal transmission based on the DVI.

Currently, the EDID is stored in an independent sub memory (mainly using an EEPROM complying with a serial communication protocol in the form of an independent chip) 25 embedded in the sink device 20, and the contents of the memory differ according to the various communication standards. Therefore, separate independent sub-memory should be prepared to support each communication standard, and the EDID conforming to each standard should be recorded in the corresponding sub-memory.

FIG. 2 is a block diagram illustrating a firmware recording method of a conventional general sink device 100. As shown in FIG. 2, the sink device 100, which is a general video display device, is internally provided to the controller 110 and the controller 110. As shown in FIG. An integrated or separated communication unit 130 for receiving firmware recording / update data from the outside and a main memory unit 120 for storing various kinds of information necessary for driving, and an EDID which is identification information of a display unit of the sink device 100. Separately configured sub-memory unit 140 for storing is added. The sub memory unit 140 is configured to be directly connected to the external source device 200 through a dedicated interface so that the external source device 200 can obtain the EDID.

Firmware recording / update of the control unit 110 of the sink device 100 is performed by a dedicated development device 170 connected to the control unit 110 through the communication unit 130. The dedicated development device 170 is generally This refers to a computer that can provide binary data (Hex code) for firmware recording according to a predetermined communication method. After generating program source code for operating the control unit 110 of the corresponding sink device 20 by using the computer, compiling / assembling it to generate binary data for recording, and executing a dedicated download program to execute the control unit 110. The default is to send the binary data.

EDID is stored in the sub-memory unit 140. When it is necessary to store or update the first time, EDID is recorded after accessing the sub-memory unit 140 using the same interface to which the source device 200 is connected. Should be implemented. Therefore, a dedicated jig 150 for interface conversion is required, and the data is written to the sub memory unit 140 after connecting the development device 160 such as a computer to the dedicated jig 150. Provide control commands and EDID related data. That is, since the development device 160 cannot be directly connected to the sub memory unit 140, a jig for converting a communication interface is required. In other words, in order to develop or produce the sink device 100 as shown, two different recording processes are required, and even in the case of updating, separate recording processes are required so that two types of recording processes are applied to all production lines. Will be required.

FIG. 3 illustrates a recent configuration of the sink device 100. As shown in FIG. 3, a case in which a video display device is used by using a digital signal instead of an analog signal is being increased. Is increasing significantly. In this case, as illustrated, an interface (not shown) for supporting each standard and sub memory units 141 to 143 storing EDIDs for individual standards are configured. Therefore, in order to record the EDID therein, it is necessary to use a plurality of types of dedicated jigs or multi dedicated jigs 150 supporting all standards. Therefore, if an EDID update is required during production, all the production lines must be equipped with a dedicated jig 150 to support this, and three different recording processes must be performed. In addition, if the firmware update of the control unit 110 is also required, two different recording systems and four different recording processes must be performed to update information for one sink device 100 so that the yield is extremely low. do.

In order to easily perform an EDID recording requiring a cumbersome method and an additional device for the above reasons, an object of the present invention is to allow the control unit of a sink device to access and store an EDID in a separate sub memory unit storing an EDID. Accordingly, the present invention provides a display unit identification information management method and an update device capable of storing EDIDs in one or more sub-memory units through a single process without additional equipment or individual sub-memory unit accesses.

Another object of the embodiment of the present invention is configured so that the sink device control unit can access the sub memory, and receives EDID information of the sub memory at the time of firmware recording / update of the sink device control unit, and records the EDID information stored in the sub memory. It is to provide a display unit identification information management method and an update device capable of performing all the recording / updating necessary for the operation of the sink device through a single process.

Another object of the embodiment of the present invention is to allow the controller of the sink device to collectively record using a single path even when a plurality of sub memories exist in the sink device so that different EDID information must be recorded in the sub memory. And a display unit identification information management method and an update device capable of greatly reducing used equipment.

Another object of the embodiment of the present invention is to periodically check the integrity and version of the EDID stored in the sub-memory existing in the sink device to automatically recover when it has incorrect information, thereby increasing the reliability of the sink device. It is an object of the present invention to provide a display unit identification information management method and an update device.

Another object of the embodiments of the present invention is to allow the control unit of the sink device to record / remove the EDID information in the sub-memories without collision without using a separate development equipment with minimal hardware change, thereby managing and repairing the production of the sink device. It is an object of the present invention to provide a display unit identification information management method and an update device for reducing the cost.

In order to achieve the above object, the display unit identification information management method according to an embodiment of the present invention comprises the steps of connecting the external device for providing the display unit identification information to the control unit of the sink device in a predetermined standard communication method; And receiving, by the controller, display unit identification information provided from the external device, and writing the identification information to a sub memory connected to the controller and an external source device connection interface.

According to another aspect of the present invention, there is provided a method of managing display unit identification information, comprising: connecting the controller to an external device that provides firmware data to record firmware to a controller included in the sink device; Recording or updating the firmware of the controller by the external device; When the firmware recording or updating of the controller is completed, the controller includes receiving the display unit identification information from the external device and recording the received display unit identification information in a sub memory unit for storing the display unit identification information connected to the control unit.

According to still another aspect of the present invention, there is provided a method of managing display unit identification information, comprising: connecting an external device that provides firmware data to update the firmware of a controller included in a sink device and the controller through a predetermined standard communication method; Receiving, by the controller, firmware data provided from the external device and updating the firmware; And receiving, by the controller, one or more types of display unit identification information from the external device and correspondingly recording the at least one display unit identification information storage sub memory unit connected to the controller.

In addition, the display unit identification information updating apparatus according to an embodiment of the present invention includes a sub-memory unit which provides the display unit identification information stored in direct connection with the source device; And a controller that is selectively connected to the sub memory unit and is connected to an external device that provides display unit identification information and receives display unit identification information and writes the display unit identification information to the sub memory.

Embodiments of the present invention as described above will be described in detail with reference to the accompanying drawings.

4 is a block diagram illustrating a structure of a sink device 300 according to an embodiment of the present invention. As illustrated, the communication unit 330 for connecting to an external development device 500 for instructing firmware update and the communication unit are shown. A control unit 310 connected with the control unit 330, a main memory unit 320 connected with the control unit 310 to store necessary information, a sub memory unit 350 storing display unit identification information EDID, A switch unit 340 for selectively switching between the control unit 310 and the external source device 400 with the sub memory unit 350. The path selection of the switch unit 340 is determined by a control signal provided by the controller 310.

The development device 500 is a computer that simply prepares firmware data and writes / updates the prepared firmware data to the controller 310. The development device 500 uses a general serial communication method or a separate communication method to the controller 310. Record the firmware. Accordingly, the communication unit 330 may include a level converter (eg, RS-232, USB, etc.) or a communication interface (JTAG, dedicated connection unit, etc.) for serial communication included in the control unit 310 or configured externally. Can be. The main memory unit 320 may be a volatile or nonvolatile memory required for driving the controller 310. The sub memory unit 350 is for storing EDID data for supporting the DDC protocol in a communication standard scheme such as HDMI based on D-Sub, DVI, and DVI. According to each of the communication standards, when external source devices are connected to the sink device using a dedicated cable, the EDID data is read out by accessing the sub memory unit 350 directly without using the control unit 310 of the sink device. .

That is, the sub memory unit 350 may be read by the controller 310 but is used in an almost independent state. Therefore, as described above, when recording or updating the EDID, the EDID should be recorded after connecting to the sub memory unit 350 from the outside using a cable according to a connected communication standard. However, in the exemplary embodiment of the present invention, the controller 310 is used as a relay so that a new version of EDID provided by the development device 500 can be directly recorded in the sub memory unit 350. To this end, as illustrated, the switch unit 340 is positioned in the connection path between the sub memory 350, the controller 310, and the sub memory 250 and the source device 400. The switch unit 340 blocks the path between the sub memory unit 350 and the source device 400 while connecting the sub memory unit 350 and the control unit 310 under the control of the controller 310. Alternatively, the path between the sub memory unit 350 and the controller 310 may be blocked while connecting the path between the sub memory unit 350 and the source device 400. Accordingly, the controller 310 can freely access the sub memory 350 at any time without a signal collision with the source device 400.

Since the sub memory unit 350 is an almost independent information storage unit for recording and maintaining EDID information, the sub memory unit 350 mostly uses a single chip EEPROM. The DVI standard applies the flash EEPROM using the IIC communication method, which is the serial communication method proposed by Philips, and HDMI, which has established the AV communication standard by inheriting DVI, which extends only video, extends to the sound transmission function, is also a sub-memory part. Access 350. However, other types of serial EEPROMs are also applicable, so the SPI (Serial Peripheral Interface) or microwire communication method used with the IIC communication method may also be applied. Therefore, the controller 310 must also provide the EDID in the IIC communication method in order to record the EDID in the sub memory unit 350.

Since the method of recording and managing the EDID provided by the external development device 500 to the sub memory unit 350 using the controller 310 as a relay means can be provided in various ways, such EDID management method will be described with reference to FIGS. 7 to 7. Referring to Figure 9 will be described in more detail.

FIG. 5 is a modification of the structure of FIG. 4, in which the controller 310 controls the sub-memory unit 350 to record the EDID only at the time of firmware recording of the controller 310 or at the time of manufacture / repair. In this way, it is a structure that can be used when the control unit 310 limits the time point for accessing the sub memory unit 350. That is, the controller 310 and the source device 400 are configured to directly control the sub memory unit 350 using the same path, and the controller 310 controls the sub memory unit 350 to record the EDID. When the source device 400 is to be guaranteed that the state is not connected to the sub memory unit 350.

Substantially, the connection between the control unit 310 and the sub memory unit 350 is defined between the input / output terminals (2 to 3) of the control unit 310 and the signal terminals of the memory chip forming the sub memory unit 350. The controller 310 may arbitrarily designate an operation method (input / output / floating) of an input / output terminal of the controller 310, and the controller 310 controls the sub memory unit 350. In this case, the operation method of the corresponding input / output terminal is set to an input / output state, and then the EDID is recorded while exchanging signals with the signal terminals of the sub-memory unit 350. Set the status of input / output terminals to floating (or input). When the state of the input / output terminals is set to floating (or input), the input / output terminals of the controller are not damaged by the corresponding signal when the sub memory unit 350 is connected to the source device 400 and transmits and receives a signal.

In this case, although there is almost no hardware change, the controller 310 relays the control unit 310 when the operation method of the controller 310 is properly changed so that the controller 310 can perform the EDID recording of the sub memory unit 350. The operation can be used.

FIG. 6 shows a typical recent sink device 300 configuration, in which a plurality of interfaces for connection standards are installed to use a plurality of DDC protocol support communication standards, and an EDID storage sub for each communication standard is installed in each interface. Memory sections 351 to 353 are configured. A switch unit as shown in FIG. 4 may be further configured between each of the sub memory units 351 to 353 and the controller 310, and as shown in FIG. 5, a path may be commonly used.

In this case, the controller 310 should receive EDID information including a signal for distinguishing a communication standard from the development device 500 and record the EDID information in the corresponding sub memory units 351 to 353.

Now, since the basic hardware configuration of the above-described embodiments of the present invention has been described, a method of managing EDID substantially using the hardware configuration will be described. Most of such management methods are performed by the control unit 310. As shown in FIGS. 5 and 6, even though the hardware connection is similar to the conventional one, since the control unit 310 to which the functions described later are added is substantially different, It must be identified as a structure.

7 to 9 illustrate an EDID management method according to embodiments of the present invention, wherein each control unit is used as a relay unit to write an EDID provided from an external development device into a sub memory so that a separate jig for EDID recording can be obtained. There is a common point that no separate recording process is required. Note, however, that each method has unique features, and that one or more of these methods can be applied in duplicate.

First, FIG. 7 illustrates a method of recording the controller firmware of the sink device and simultaneously recording the EDID in the sub memory. The firmware and EDID information recording for the operation of the sink device is collectively performed through a single communication channel.

As shown, first, a sink device and an external development device providing firmware data and EDID information are interconnected. At this time, if the control unit of the sink device supports the communication function, the communication unit and the communication unit of the external development device (computer) can be directly connected (connection using USB or RS-232), the control unit of the sink device supports the communication function If not, a separate communication unit (RS-232 level conversion element, USB support element, etc.) can be further configured to connect with the communication unit of an external development device (computer). In addition, if separate signals and interfaces (ISP (In circuit Serial Programming), JTAG, dedicated wiring, etc.) are required for the firmware recording, the interface configured in the sink device and the dedicated programmer provided in the development device may be connected. These connection schemes are already determined for the controller firmware recording and updating of the sink device. Here, the EDID is provided using a communication channel configured for the controller firmware recording and updating, and the controller relays and writes the data to the sub memory. Do it.

After updating the firmware of the controller through the above connection, the controller can be driven again with the updated firmware through a reset process. Thereafter, the controller communicates with the external development device to receive the EDID and temporarily stores the EDID. Next, check the version information included in the predetermined position of the received EDID, and check the version information of the EDID stored in a specific address of the sub-memory, and if the versions do not match, the temporary stored EDID is recorded in the sub memory.

The version information may be newly promised for EDID management, and may be configured to receive EDID information from a development device and record it in a sub memory when firmware recording is completed without checking version information, and receive all EDID information. Note that the EDID information may be recorded in the sub memory by receiving EDID information in units of real time and storing the data in the sub memory without receiving the temporary unit.

Most of the recently used controllers have system registers that can be used to determine whether it is restarted by a normal reset, restarted after a firmware update, restarted by a problem, or restarted by a power failure. Since the process of receiving the EDID information can be performed only once after updating the firmware, the process can be adjusted so that the process does not occur every time the controller is reset or the power is applied.

Although the above-described method may be preferred for batch recording, there may be a problem in that recording time is long when the firmware is unconditionally recorded during EDID development, so that the EDID data is separated from the firmware recording for development convenience. Can be updated. That is, the control unit program may be configured to operate the control unit in the EDID recording mode by excluding a portion related to firmware recording in the process and providing a predetermined command to the control unit from an external development device. In this case, the control unit operates normally. While the EDID recording mode is executed by the command of the external development device, the above-described process of receiving the EDID information provided by the external development device and writing it to the sub memory after version checking or unconditionally writing it to the sub memory is performed. Can be performed.

To apply the process to the sink device having the configuration as shown in FIG. 4, the controller controls the switch unit before the controller accesses the sub memory to activate only a path between the controller and the sub memory and between the controller and the sub memory after the sub memory is used. It may be necessary to further control the switch to deactivate the path.

In order to apply to the sink device having the configuration as shown in FIG. 5, only when the control unit accesses the sub memory, the connected input / output pin is used as an input / output, and after the access is completed, the input / output pin is input or floated. You may need to do more to set it up. Since the sink device is an image display device, a warning message may be provided to remove externally connected source devices on the screen before the access.

As the simplest method of simultaneously performing firmware recording / update and EDID recording in addition to the above-described method, when generating firmware data (Hex code) for the sink device controller from an external development device, the EDID information is inserted to be stored in a predetermined memory location. There may be a way to create a single file. That is, instead of receiving the EDID from an external device through a separate process after the firmware recording, the EDID information is recorded in the control unit during the firmware recording. Although there may be a waste of memory in the controller, considering that EDID information is relatively small in size, it is sufficiently feasible. That is, after the firmware update is completed, the controller may be reset and restarted. After that, the controller may check the version match every time the controller is restarted, and if the versions do not match, update the EDID information of the sub memory to the information stored in the controller. .

8 is another embodiment of the present invention to utilize the latest firmware update scheme. Recently, instead of rewriting the entire program of the controller according to the actual programming method to update the firmware of the sink devices from the user's point of view, a basic program called a boot program is recorded in the controller, and the rest of the firmware is stored in a general communication method. A method of receiving and updating firmware is used. The firmware update using such a boot program is a general function that can be performed even at the 8-bit controller level. The boot program includes a general program such as a communication related part and a firmware recording part, and the boot program can be modified. Therefore, after the firmware update is completed when the boot program is created, an EDID information may be added after the EDID information is subsequently received and recorded in the appropriate sub memory, so that the EDID update is collectively performed while the controller is operating in the mode for firmware update. It can be done as an enemy.

FIG. 9 is a flowchart illustrating an EDID management method with enhanced management. After performing firmware recording as shown in the drawing, the EDID information is stored through various methods described above, and then the EDID information is periodically executed when the controller is normally driven. Is to determine whether to update the EDID of the sub memory.

That is, the EDID information may be added to the firmware and recorded in the controller, or may be obtained from an external development device when the controller is restarted after the firmware is recorded. In addition, regardless of the firmware recording, the EDID information may be received by a command of an external development device, and the EDID may be stored in the main memory (the main memory includes nonvolatile memory).

Thereafter, when the controller operates, the controller periodically checks the EDID information stored in the sub memory to determine the validity, and if not, updates the EDID of the sub memory to the stored EDID.

Validation of the EDID may use only the above-described version information, but may also use information for confirming the validity of the entire data, such as a check sum. The checksum may be obtained each time, or may be additionally recorded as version information in a predetermined area within the information of the EDID (when generating EDID information). This can solve problems that may occur due to EDID corruption during operation, version conflicts due to various development environments, or mixing of conventional firmware recording or conventional EDID recording methods.

The aforementioned various methods commonly use a single communication channel for firmware update and EDID update in common, and use the control unit as a subject of the EDID update, thereby enabling a plurality of EDIDs without additional equipment or additional recording process. It can be stored in sub-memory configured according to the communication standard, and the application of these methods can greatly facilitate development, production, and management, and the necessity also increases as sink devices adopting various communication standards gradually emerge. It is expected to be.

Although a single method among the above-described methods may be applied, when a plurality of methods are mixed and used, superior EDID management is possible.

As described above, the display unit identification information management method and the updating apparatus according to the embodiment of the present invention allow the control unit of the sink device to access the individual sub-memory unit storing the display unit identification information and store the display unit identification information. It is possible to store display identification information in one or more sub memory units through a single communication channel and process without additional equipment or individual sub memory unit access, thereby reducing costs and improving yield.

The display unit identification information management method and update apparatus according to the embodiment of the present invention are configured to allow the sink device controller to access the sub memory, and receive EDID information of the sub memory during firmware recording / update of the sink device controller. By allowing the EDID information stored in the sub memory to be recorded / updated, all firmware and data necessary for the operation of the sink device can be recorded / updated through a single process, thereby simplifying the mass production process.

The display unit identification information management method and update apparatus according to an embodiment of the present invention periodically checks the integrity and version of the EDID stored in the sub-memory existing in the sink device so that it can automatically recover when it has incorrect information. Therefore, it has the effect of greatly improving the ease of development, mass production reliability and the reliability of the sink device at the user level.

The display unit identification information management method and update apparatus according to the embodiment of the present invention are configured to allow the sink device controller to access the sub memory, and receive EDID information of the sub memory during firmware recording / update of the sink device controller. By allowing the EDID information stored in the sub memory to be recorded / updated, when the firmware update function is provided by the user, not only the firmware of the controller but also the EDID information can be updated at the user level, thereby improving performance of the sink device. The restriction is relaxed and there is an effect of preventing a version conflict caused by a user mistake.

Claims (21)

Connecting an external device for providing display identification information to a control unit of the sink device in a predetermined standard communication method; And receiving, by the controller, the display unit identification information provided from the external device and writing the display unit identification information to a sub memory connected to the control unit and an external source device connection interface. The method of claim 1, wherein the controlling unit writes display unit identification information to the sub memory. Blocking, by the controller, a path between the external source device connection interface and the sub memory, connecting the path between the controller and the sub memory, and writing the display unit identification information to the sub memory; And after the recording is completed, the control unit blocking the path between the control unit and the sub memory and connecting the path between the external source device connection interface and the sub memory. The method of claim 1, wherein the controlling unit writes display unit identification information to the sub memory. And the control unit recording the display unit identification information while directly operating the sub memory according to a hardware communication method required by the sub memory. The method of claim 3, wherein the hardware communication method required by the sub memory is one of communication methods including a micro wire, an SPI, and an IIC applied to a serial EEPROM. The method of claim 1, wherein the control unit receives the display unit identification information provided from the external device and writes it to a sub memory connected to the interface for connecting the control unit and the external source device. And wherein the external device is a computer, the display identification information is EDID (Extended Display IDentification Data), and the sub memory is an EEPROM in an independent chip state. The method of claim 1, wherein the external source device connection interface is at least one of D-Sub, DVI, and HDMI. The method of claim 1, wherein the control unit receives the display unit identification information provided from the external device and writes it to a sub memory connected to the interface for connecting the control unit and the external source device. Recording / updating the firmware of the controller after including the display unit identification information in the new firmware data for firmware recording / update of the controller; And recording the display unit identification information included in the firmware into the sub memory after the controller which has completed the recording / update of the firmware is restarted. The method of claim 1, wherein the control unit receives the display unit identification information provided from the external device and writes it to a sub memory connected to the interface for connecting the control unit and the external source device. Recording / updating the firmware of the controller after including the display unit identification information in the new firmware data for firmware recording / update of the controller; Checking the validity of the information of the sub-membrane on a predetermined time basis after restarting the controller after the recording / update of the firmware is completed, and writing the display unit identification information included in the firmware to the sub-memory if the information is not valid; Display unit identification information management method comprising a. The method of claim 8, wherein the checking of information validity of the sub memory comprises: And identifying whether the display unit identification information of the corresponding sub memory is intact by using the checksum of the version information of the display unit identification information stored in the sub memory and / or the display unit identification information stored in the sub memory. Information management method. Connecting the controller with an external device that provides firmware data to record firmware in the controller included in the sink device; Recording or updating the firmware of the controller by the external device; And when the firmware recording or updating of the controller is completed, the controller receiving the display unit identification information from the external device and recording the received display unit identification information in a sub memory unit for storing the display unit identification information connected to the controller. The display part identification information management method characterized by the above-mentioned. The method of claim 10, wherein recording the received display unit identification information into the sub memory unit for storing the identification information comprises: And classifying and recording display unit identification information according to different standards into a plurality of connected sub-memory units. 12. The method of claim 11, wherein the display unit identification information according to the different standards is display unit identification information according to standards including D-Sub, DVI, and HDMI. The display apparatus of claim 10, wherein when the firmware recording or updating of the controller is completed, the controller receives display unit identification information from the external device and records the received display unit identification information in a sub memory unit for storing display unit identification information connected to the controller. The steps are Resetting the controller when firmware recording or updating of the controller is completed; And receiving the display unit identification information provided by the external device after the reset, and recording the information by directly controlling the sub memory unit connected to the controller. Connecting the controller to an external device that provides firmware data to update firmware of the controller included in the sink device through a predetermined standard communication method; Receiving, by the controller, firmware data provided from the external device and updating the firmware; And receiving, by the control unit, one or more types of display unit identification information from the external device and correspondingly recording one or more display unit identification information storage sub-memory units connected to the control unit. The method of claim 14, wherein connecting the external device and the control unit through a predetermined standard communication method to update the firmware comprises: And connecting in a standard serial communication method to perform a firmware update by using a boot program provided in the controller. The method of claim 15, wherein the control unit receives one or more types of display unit identification information from the external device and records the identification information corresponding to the one or more display unit identification information storage sub memory units connected to the control unit. Receiving display unit identification information, the type of which is classified, from the external device after firmware storage is completed by a boot program of the controller; And storing, by the boot program of the controller, the received display unit identification information in a corresponding sub-memory storage unit for storing the display unit identification information connected to the control unit. A sub memory unit which is directly connected to a source device and provides display unit identification information stored therein; And a controller which is selectively connected to the sub memory unit and connected to an external device that provides display unit identification information and receives display unit identification information and writes the display unit identification information to the sub memory. 18. The apparatus of claim 17, wherein the sub memory unit has a plurality of communication standard numbers determined to be supported in design, and display unit identification information stored in each sub memory unit is different. 19. The apparatus of claim 18, wherein the communication standard is a communication standard supporting a DDC protocol including D-Sub, DVI, and HDMI. 18. The method of claim 17, wherein the control unit is located between the sub memory unit and the control unit and connected or disconnected while switching a path between the control unit and the sub memory unit and a path between the sub memory unit and the source device by selection of the control unit. And a display unit further comprising a switch unit. 18. The apparatus of claim 17, wherein the external device is a computer, the display identification information is EDID (Extended Display IDentification Data), and the sub memory is an independent chip state EEPROM.

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