KR100584621B1 - Apparatus and method for outputting display identification data according to connector type - Google Patents

Abstract

The present invention relates to an apparatus and a method for detecting a type of a connector and providing information for a display device recognition according to the type to a system. According to the present invention, the display recognition information output device according to the connector type is analog display recognition. Analog display recognition information storage output unit for storing information and outputting to the system if there is a command, digital display recognition information storage output unit for storing the digital display recognition information and outputting to the system if there is a command, pins of the connector The analog display recognition information storage output unit, or the display recognition information storage output unit, according to the connector type detection unit detecting the type of the connector from the output of Display And a display recognition information output command unit for instructing to output the ray recognition information to the system.

According to the present invention, by detecting three types of DVI connector (DVI-A type, DVI-D type, DVI-I type) and by transmitting information for accurate display device recognition accordingly, the display device is automatically optimized. The effect is that you can implement full plug and play functionality that allows the environment to be set up.

Description

Apparatus and method for outputting display identification data according to connector type}

1 is a block diagram of a conventional display recognition information output device.

2 is a block diagram of a conventional improved display recognition information output device.

3 is a block diagram of a display recognition information output device according to a connector type according to an embodiment of the present invention.

4 is a diagram illustrating an example in which a display recognition information output device according to a connector type according to an embodiment of the present invention is actually implemented.

5 is a front view of a DVI-I type connector.

6 is a signal constellation diagram for the DVI-I type connector pins.

7 is a logical operation table for detecting the type of the DVI connector.

8 is a flowchart illustrating a method of outputting display recognition information according to a connector type according to an embodiment of the present invention.

Fig. 9 is a diagram showing an example of actual use of the DVI-A type connector.

Fig. 10 is a diagram showing an example of actual use of the DVI-D type connector.

Fig. 11 is a diagram showing an example of actual use of the DVI-I type connector.

The present invention relates to an apparatus and method for detecting a type of a connector and providing information to a system for recognition of a display device according to the type.

Nowadays, the DVI (Digital Visual Interface) by the standardization organization DDWG (Digital Display Working Group) protocol is confirmed as a global standard, and is rapidly spreading to various display devices. Conventionally, the EDID information transmission method is unified without distinguishing between three types of DVI input methods, that is, DVI connector types (DVI-A type, DVI-D type, and DVI-I type), thereby providing accurate EDID for the input method. There has been a problem of transmitting EDID information arbitrarily selected among analog or digital rather than information transmission.

1 is a block diagram of a conventional display recognition information output device.

The conventional display recognition information output device is composed of a DVI connector 11 on the system side, a DVI connector 12 on the display device side, and an EEPROM 13.

As soon as power is applied to the system, the system supplies power to the EEPROM (13) on the display device through pins 14 of the DVI connectors (11, 12), pins 6, 7 of the DVI connectors (11, 12). Through pin 1, EDID (Extended Display Identification Data) information for reading the display device stored in the EEPROM 13 is read. Through this process, the system receives the optimal resolution or color information of the display device, that is, the monitor, and sets the optimal environment for the monitor. Conventionally, the system provides a Plug and Play (PNP) function to automatically set a system through a DDC (Display Data Chanel) that the user sets the optimal environment for the monitor.

 The problem is that there are three types of DVI connectors that can be connected between the system and the display device: DVI-A type, DVI-D type, and DVI-I type, whereas the signal line for transmitting EDID information is pin 6 (DDC clock), Since it is unified to pin 7 (DDC data), it is not able to transmit EDID information corresponding to the type of connector connected. In other words, when connected to the system in DVI-D type, the digital EDID information is connected to the system in the DVI-A type, and the analog EDID information in the case of being connected to the system in the DVI-A type. Among the analog EDID information, desired information should be transmitted. However, in the related art, the signal line for DDC for transmitting display device recognition information is unified with pins 6 and 7, so that only one of digital or analog EDID information is used. It was designed to be transportable. Therefore, there is a problem that only one of digital or analog EDID information is transmitted regardless of the connector type, that is, regardless of the type of the display device (because the connector type naturally depends on the type of the display device).

2 is a block diagram of a conventional improved display recognition information output device.

The conventional improved display recognition information output device is composed of a digital / analog video input / output section 25, first and second memory sections 21 and 22, a switching section 23, and a microcomputer 24.

The digital / analog video input / output unit 25 receives a digital or analog video signal from the PC 26 and outputs corresponding display related information to the PC 26. The first and second memory units 21 and 22 store analog display related information and digital display related information, respectively. The switching unit 23 connects any one of the first and second memory units 21 and 22 to the digital / analog video input / output unit 25. The microcomputer 24 grasps the video format (analog / digital) of the PC according to a user's input selection signal or a synchronization signal output from the PC 26, and outputs display related information according to the video format to the PC 26. The switching unit 23 is controlled so as to. The conventional improved display recognition information output device detects an image format (analog / digital) of a PC according to a user's input selection signal or a synchronization signal output from the PC 26, and display related information according to the corresponding image format is displayed on the PC. It is output to (26).

The problem is that, since the connector type is limited to the DVI-I type, the reality is that, for the time being, the majority of analog-only systems are overlooked, and the DVI-A and DVI-D types are actually produced and used. . That is, the conventional technology has a problem in that it is not possible to provide the system with information for proper display device recognition for the display device and the system in which the DVI-A type or the DVI-D type connector is installed.

An object of the present invention is to provide a device and method for detecting a type of a connector and transmitting information for accurate display device recognition to a system based on the type.

The display recognition information output apparatus according to the connector type according to the present invention for solving the above problems stores predetermined analog display recognition information, and when there is an output command for the analog display recognition information, An analog display recognition information storage output unit outputting to a predetermined system; A digital display recognition information storage output unit for storing predetermined digital display recognition information and outputting the digital display recognition information to the system when there is an output command for the digital display recognition information; A connector type detector for detecting a type of the connector from an output of pins of a predetermined connector; And outputting the analog display recognition information or the digital display recognition information to a predetermined system according to the type of the connector detected by the connector type detection unit, or to the display recognition information storage output unit. And a display recognition information output command unit for instructing to do.

According to another aspect of the present invention, there is provided a method of outputting display recognition information according to a connector type, the method including: storing predetermined analog display recognition information; Storing predetermined digital display recognition information; Detecting from the output of the pins of a predetermined connector the type of the connector; Instructing to output the analog display recognition information or the digital display recognition information according to the detected connector type; Outputting the analog display recognition information when there is an output command for the analog display recognition information; And outputting the digital display recognition information when there is an output command for the digital display recognition information.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a block diagram of a display recognition information output device according to a connector type according to an embodiment of the present invention.

The display recognition information output device includes an analog display recognition information storage output unit 34, a digital display recognition information storage output unit 33, a connector type detector unit 31, and a display recognition information output command unit 32.

The analog display recognition information storage output unit 34 stores the analog display recognition information, and outputs the analog display recognition information to the system when there is an output command for the analog display recognition information. The analog display recognition information has a data structure according to the Extended Display Identification Data (EDID) specification of the Video Electronics Standards Association (VESA), which is a standardization organization. The system may be a personal computer (PC) for providing image information. The analog display recognition information is transmitted through a display data channel (DDC). DDC, also defined by VESA, refers to a standard that enables data exchange between a PC's graphics card and monitor. When analog display recognition information is transmitted to the PC through the DDC, for example, when the VGA (Video Graphics Array) board of the PC is transmitted to the PC when information such as horizontal frequency or vertical frequency that is analog display recognition information is transmitted to the PC Sets the optimal monitor environment based on the transmitted information.

The digital display recognition information storage output unit 33 stores the digital display recognition information, and when there is an output command for the digital display recognition information, outputs the digital display recognition information to the system. The digital display recognition information, like analog recognition information, has a data structure conforming to the EDID specification of VESA, a display recognition information standardization organization, and is transmitted to a PC or the like through the DDC.

The connector type detector 31 detects the type of the connector from the output of the pins of the connector. Here, the connector is generally a DVI connector. The connector type detector detects from the outputs of the pins of the DVI connector whether the DVI connector is of the DVI-A type, the DVI-D type, or the DVI-I type.

Specifically, if the output of the TDMS clock ground, pin 22 of the DVI connector, is high impedance and the output of analog ground, pin C5 of the DVI connector, is ground, the DVI connector is detected to be DVI-A type. do. If the output of TDMS clock ground, pin 22 of the DVI connector, is ground, and the output of analog ground, pin C5 of the DVI connector, is high impedance, it is detected that the DVI connector is of type DVI-D. If the output of TDMS clock ground, pin 22 of the DVI connector, is ground, and the output of analog ground, pin C5 of the DVI connector, is ground, the DVI connector is detected to be DVI-I type.

The display recognition information output command unit 32 recognizes the analog display to the analog display recognition information storage output unit 34 or the display recognition information storage output unit 33 according to the type of the connector detected by the connector type detection unit 31. To output the information, or the digital display recognition information, to the system. Specifically, the display recognition information output command unit 32 is connected to the analog display recognition information storage output unit 34 when the type of the DVI connector is detected as the DVI-A type by the connector type detection unit 31. Command to output the analog display recognition information.

When the connector type detection unit 31 detects the type of the DVI connector as the DVI-D type, it instructs the digital display recognition information storage output unit 33 to output the digital display recognition information. When the type of the DVI connector is detected by the connector type detection unit 31 as the DVI-I type, the analog display recognition information storage output unit 34 outputs the analog display recognition information according to predetermined additional information. Command The additional information is information indicating that the analog display recognition information is to be output by the user's selection. That is, when the user selects his monitor to operate in an analog manner by using the On Screen Display (OSD) function, the analog display recognition information will be output to the system through the DDC.

When the type of the DVI connector is detected by the connector type detection unit 31 as the DVI-I type, the digital display recognition information storage output unit is instructed to output the digital display recognition information in accordance with predetermined additional information. The additional information is information indicating that the digital display recognition information is to be output by the user's selection. That is, when the user selects his monitor to operate in a digital manner using the OSD function, the digital display recognition information will be output to the system through the DDC.

4 is a diagram illustrating an example in which a display recognition information output device according to a connector type according to an embodiment of the present invention is actually implemented.

The display recognition information output device according to the connector type of FIG. 4 includes a DVI connector 411 on the system side, a DVI connector 412 on the display device (generally, a monitor), two pull-up resistors 421 and 422, and a MCU. (Micro Controller Unit, 43), NOT gate 44, two buffers 45 and 46, and two EEPROM (Electrically Erasable And Programmable Read Only Mmemory).

When the DVI connector 412 on the display device side is connected to the DVI connector 411 on the system side, the type of the DVI connector can be known from the grounds of pins 22 and C5 of the DVI connector 412. That is, if the output of TDMS clock ground, pin 22 of the DVI connector, is high impedance, and the output of analog ground, pin C5 of the DVI connector, is ground, the type of the DVI connector is DVI-A type. If the output of TDMS clock ground, pin 22, is ground, and the output of analog ground, pin C5 of the DVI connector, is high impedance, the type of DVI connector is DVI-D type, pin 22 of the DVI connector, TDMS. If the output of the clock ground is ground and the output of the analog ground, pin C5 of the DVI connector, is ground, the DVI connector is of type DVI-I.

The two pull-up resistors 421 and 422 are devices for preventing noise or malfunction when the outputs of pins 22 and C5 of the DVI connector 412 on the display device have no signal (high impedance). When the output of pin 22 of the DVI connector 412 on the display side is no signal, high (+ Vcc) is input to the A terminal of the MCU 43, and when the output of pin C5 is no signal When high (+ Vcc) is input to the B terminal of the MCU 43 and the output of pin 22 is ground, low (+ 0V) is input to the A terminal of the MCU 43 and the pin of C5 is When the output is ground, low (+ 0V) is input to the B terminal of the MCU 43.

The MCU (Micro Controller Unit) 43 selects one of the two EEPROMs 47 and 48 based on the signals input to the A terminal and the B terminal. EEPROM 47 stores digital display recognition information, and EEPROM 48 stores analog display recognition information. The operation is as follows.

When the DVI-A type connector 411 is inserted into the DVI connector 412, only pin C5 of the pins 22 and C5 is grounded, so that the high of the A terminal of the MCU 43 and the low of the B terminal are Is entered. The MCU 43 outputs a low signal from the C terminal to select the analog EEPROM 48. The NOT gate 44 receives a low signal from the C terminal, turns off the IC2 buffer 45, and turns on the IC3 buffer 46. Since + 5V power is supplied only to the analog EEPROM 48, the analog display recognition information stored in the analog EEPROM 48 is output to pin 7 of the DVI connector 412 through the DDC.

When the DVI-D type connector 411 is inserted into the DVI connector 412, only pin 22 of pins 22 and C5 is grounded, so that low is applied to the A terminal of the MCU 43, and high to the B terminal. Is entered. The MCU 43 outputs a high signal from the C terminal to select the digital EEPROM 47. The NOT gate 44 receives a high signal from the C terminal, turns on the IC2 buffer 45 and turns off the IC3 buffer 46. Since + 5V power is supplied only to the digital EEPROM 47, the digital display recognition information stored in the digital EEPROM 47 is output to pin 7 of the DVI connector 412 through the DDC.

When the DVI-I type connector 411 is inserted into the DVI connector 412, pin 22 and pin C5 modes are grounded, so that a low is input to the A terminal of the MCU 43 and a low is input to the B terminal. On a PC equipped with an OSD function, the user can select whether to use the monitor in an analog or digital manner, and on a PC with enhanced plug and play function, depending on the format of the input video signal. You can choose analog method, or digital method automatically. When it is determined which of the above-described schemes is to be used as an analog or digital method, the MCU 43 selects the analog EEPROM 48 or the digital EEPROM 47 to select C. Outputs high or low signal to the terminal.

5 is a front view of a DVI-I type connector.

The DVI-I type connector of FIG. 5 is composed of three rows of 29 pins. The DVI-A type connector uses five pins (C1 to C5) and shared pins (6, 7, 8, 14, 15, and 16) for the analog signal only among the 29 pins of the three rows. The DVI-D type connector uses three rows of 24 pins except for five pins (C1 ~ C5) for analog signals only. Among them, one unused pin 8 is included to transmit 23 signals.

6 is a signal constellation diagram for the DVI-I type connector pins.

Pins 1 to 5, pins 9 to 13, and pins 17 to 21 are digital video data transmission channels. They use a digital transmission protocol called Transition Minimized Differential Signaling (TMDS). For both DVI-I and DVI-D types, digital data transmission is done in the TMDS link area. The single link has three data transmission channels (Data 0, Data 1, Data 2), and the dual link has six times its double (Data 0, Data 1, Data 2, Data 3, Data 4, Data 5). If the input pixel data rate is less than 165 MHz, only a single link is active, and if it is higher than that, the dual link is enabled. Pins 22, 23, and 24 are the TDMS clock data.

Pins C1 ~ C5 and 8 are analog video data transmission channels. Pins 6 and 7 are for DDC clock and DDC data with plug and play support. Pins 14 are for controlling power standby.

7 is a logical operation table for detecting the type of the DVI connector.

As described above in FIG. 4, when the DVI-A type connector is inserted into the DVI connector of the monitor, only pin C5 of the 22 pins and the C5 pins is grounded, so that the A terminal of the MCU is high and the B terminal is low. Is input. The MCU outputs a low signal from the C terminal to select an EEPROM for IC5 analog. The NOT gate receives a low signal from the C terminal, turns off the IC2 buffer, and turns on the IC3 buffer. Since + 5V power is supplied only to the IC5 analog EEPROM, the analog display recognition information stored in the IC5 analog EEPROM is output to pin 7 of the DVI connector through the DDC.

When the DVI-D type connector is inserted into the DVI connector of the monitor, only pin 22 of pins 22 and C5 is grounded, so that low is input to the A terminal of the MCU and high to the B terminal. The MCU outputs a high signal from the C terminal to select the IC4 digital EEPROM. The NOT gate receives a high signal from the C terminal, turns on the IC2 buffer, and turns off the IC3 buffer. Since + 5V power is supplied only to IC4 digital EEPROM, digital display recognition information stored in IC4 digital EEPROM is output to pin 7 of DVI connector through DDC.

When the DVI-I type connector is inserted into the DVI connector of the monitor, pin 22 and pin C5 modes are grounded, so that a low is input to the A terminal of the MCU and a low to the B terminal. On a PC equipped with the OSD function, the user can select whether to use the monitor in an analog or digital manner, and on a PC with an enhanced plug and play function, depending on the format of the input video signal, You can choose either analog or digital. If it is determined which of the above-described methods is to be analog or digital, then the MCU selects a high signal, or low, at the C terminal to select IC5 analog EEPROM, or IC4 digital EEPROM. Output the signal.

8 is a flowchart illustrating a method of outputting display recognition information according to a connector type according to an embodiment of the present invention.

First, the analog display recognition information is stored (81). Subsequently, the digital display recognition information is stored (82). Analog display recognition information, and digital display recognition information, have a data structure that conforms to the EDID specification of VESA. Then, from the output of the pins of the connector, the type of the connector is detected (83). Here, the connector refers to the DVI connector. That is, from the outputs of the pins of the DVI connector, it is detected whether the DVI connector is of the DVI-A type, the DVI-D type, or the DVI-I type. Specifically, if the output of the TDMS clock ground, pin 22 of the DVI connector, is high impedance and the output of analog ground, pin C5 of the DVI connector, is ground, the DVI connector is detected to be DVI-A type. If the output of the TDMS clock ground, pin 22 of the DVI connector, is ground, and the output of analog ground, pin C5 of the DVI connector, is high impedance, the DVI connector is detected to be DVI-D type. If the output of TDMS clock ground, pin 22 of the connector, is ground, and the output of analog ground, pin C5 of the DVI connector, is ground, it is detected that the DVI connector is of type DVI-I.

Subsequently, command to output the analog display recognition information or the digital display recognition information according to the detected connector type. That is, when the type of the DVI connector is detected as DVI-A type (84), the command is to output analog display recognition information (87), and when the type of the DVI connector is detected as the DVI-D type (85). Command to output digital display recognition information (88). If the type of the DVI connector is detected as the DVI-I type (86), the analog display recognition information is output (87) or the digital display recognition information is output (88) according to the additional information. . The additional information is information indicating that analog display recognition information or digital display recognition information is to be output by the user's selection.

Subsequently, when there is an output command for analog display recognition information, the analog display recognition information is output (89). Subsequently, when there is an output command for digital display recognition information, the digital display recognition information is output (810).

Fig. 9 is a diagram showing an example of actual use of the DVI-A type connector.

FIG. 9 illustrates a front view, a rear view, and a plan view of an adapter in which a DVI-A type connector plug and a VGA socket are manufactured by Molex, a connector company.

Fig. 10 is a diagram showing an example of actual use of the DVI-D type connector.

FIG. 10 is a diagram illustrating a front view, a rear view, and a plan view of an adapter to which a DVI-D type connector plug manufactured by Molex, a specialized connector company, and a DFP (Digital Flat Panel) socket are fitted.

Fig. 11 is a diagram showing an example of actual use of the DVI-I type connector.

FIG. 11 is a front view, a rear view, and a plan view of an adapter to which a DVI-I type connector plug and a VGA plug, which are manufactured by Molex, a specialized connector company, are fitted.

As described above with reference to FIGS. 9, 10, and 11, unlike the DDWG standard specification in which the DVI-D type and the DVI-I type are presented, considering the reality that most systems only use pure analog methods in the actual industry. DVI-A type is also produced.

Meanwhile, the above-described embodiments of the present invention can be written as a program that can be executed in a computer, and can be implemented in a general-purpose digital computer that operates the program using a computer-readable recording medium.

The computer-readable recording medium may be a magnetic storage medium (for example, a ROM, a floppy disk, a hard disk, etc.), an optical reading medium (for example, a CD-ROM, DVD, etc.) and a carrier wave (for example, the Internet). Storage medium).

So far I looked at the center of the preferred embodiment for the present invention. Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

According to the present invention, it detects three DVI input methods from the system to the display device, that is, three DVI connector types (DVI-A type, DVI-D type, and DVI-I type) and recognizes the correct display device accordingly. By transmitting the information for the user, it is possible to implement a complete plug and play function, so that the optimum environment of the display device is automatically set.

Claims (11)

(a) storing the predetermined analog display recognition information; (b) storing predetermined digital display recognition information; (c) detecting the type of the connector, from the output of the pins of the connector towards the display device; (d) instructing to output the analog display recognition information or the digital display recognition information according to the detected connector type; (e) outputting the analog display recognition information to a system for providing the image information based on the analog display image information to the display apparatus when there is an output command for the analog display recognition information; And and (f) outputting the digital display recognition information to a system for providing image information based on the digital display recognition information to the display device when there is an output command for the digital display recognition information. Display recognition information output method according to the connector type. The method of claim 1, wherein the analog display recognition information and the digital display recognition information have a data structure conforming to the EDID specification of the VESA. The method of claim 1, wherein the connector is a DVI connector. 4. The method of claim 3, wherein step (c) detects whether the DVI connector is a DVI-A type, a DVI-D type, or a DVI-I type from the outputs of the pins of the DVI connector. Display recognition information output method according to the connector type. The method of claim 4, wherein step (c) (c1) When the output of the TDMS clock ground, pin 22 of the DVI connector, is high impedance, and the output of the analog ground, pin C5 of the DVI connector, is ground, it is detected that the type of the DVI connector is DVI-A type. Doing; (c2) When the output of the TDMS clock ground, pin 22 of the DVI connector, is ground, and the output of the analog ground, pin C5 of the DVI connector, is high impedance, it is detected that the type of the DVI connector is DVI-A type. Doing; And (c3) When the output of the TDMS clock ground, pin 22 of the DVI connector, is ground, and the output of analog ground, pin C5 of the DVI connector, is ground, detecting that the type of the DVI connector is DVI-I type. Display recognition information output method according to the connector type characterized in that it comprises a step. The method of claim 4, wherein step (d) (d1) instructing to output the analog display recognition information when the type of the DVI connector is detected as a DVI-A type; And and (d2) if the DVI connector type is detected as a DVI-D type, instructing to output the digital display recognition information. 7. The connector according to claim 6, wherein the step (d1) instructs the analog display recognition information to be output according to predetermined additional information when the type of the DVI connector is detected as a DVI-I type. Display recognition information output method according to the type. The method of claim 7, wherein the additional information is information indicating that the analog display recognition information is to be output by a user's selection. 7. The connector according to claim 6, wherein the step (d2) instructs the digital display recognition information to be output according to predetermined additional information when the type of the DVI connector is detected as a DVI-I type. Display recognition information output method according to the type. The method of claim 9, wherein the additional information is information indicating that the digital display recognition information is to be output by a user's selection. A computer-readable recording medium having recorded thereon a program for executing the method of any one of claims 1 to 10.

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