KR100244877B1 - Integrated interface module - Google Patents

Abstract

The present invention relates to a display data channel (DDC) interface of a monitor utilized for communication between various control / inspection systems and a monitor in production in a monitor production line, in particular, all monitor communication methods, that is, RS232C, DDC1, Communication interface of DDC2B, DDC2AB is divided into one interface to enable one interface module. RS232C, DDC1, DDC2B, and DDC2AB communication interfaces are distinguished in the conventional monitor communication method. In order to store DDC1, DDC2B, and DDC2AB data under such a system, since there is no interface module for DDC2AB communication and DDC2AB data is checked on the monitor screen through a DDC2AB support card. The problem of reducing time and work efficiency according to the process as the production line and manufacturing process are divided It is possible.

The present invention integrates all communication methods (DDC1, DDC2B, DDC2AB, RS232C), which distinguishes the communication interface of the monitor, to enable one interface module. Integrate to shorten production lines and manufacturing processes.

Description

Integrated interface module of all monitor communication methods

In the present invention, in the communication method between the monitor and the PC, an interface module capable of using one interface, which is classified as an interface such as RS232C, DDC1, DDC2B, DDC2AB, etc., is divided into three processes in the case of the monitor manufacturing process. It's about the entire interface module that allows you to integrate it into one process.

In general, DDC (Display Data Channel) is a method of storing information such as the specification, manufacturing date, or serial number of the monitor so that the user can display the stored information on the screen of the monitor if necessary.

Currently, DC has DDC1 mode and DDC2 mode.

DDC1 mode displays the information entered at the time of manufacture of the monitor by simply reading it and displays it on the monitor screen. DDC2 mode not only displays the information entered at the time of manufacture of the monitor on the monitor screen, In this mode, DDC2B mode is a simple way to read the memory data stored in the ROM (24LC21 chip) in the monitor, and the DDC2AB mode is used by the host computer and the monitor to form the ACCESS BUS format. It is a communication method to save and change data in the microcomputer.

A method of communicating with a conventional monitor and a PC will be described with reference to FIGS. 1 and 2 as follows.

A communication mode control signal is applied to the mode sensing unit 2 and the switch unit 3 through the parallel port and the serial port of the PC 1, and the parallel port of the PC 1 In the mode detection unit 2 connected to the DDC1 / DDC2B mode switching to configure the line, and the switch (3) Toggle from the switch (3) connected through the serial port of the PC (1) RS232C communication and the mode It is configured to enable the DDC1 / DDC2B communication method switched in the sensing unit 2, and to output the data stored in the monitor manufacturing in the monitor 4 and display on the screen according to the communication mode,

)에 접속되어 수직동기신호(VCLK)를 제어하여 모드절환이 되도록 하고, 상기 모드절환에 따라 디디씨부(2A)는 시리얼 데이터(SDA)를 통해 모니터에 대한 정보를 입출력하도록 구성된다.The mode detecting unit 2 receives the vertical synchronizing signal VCLK from the signals VCLK, SCL, and SDA applied from the terminals P1, P2, and P3 of the PC 1 through the buffer B1. To the terminal D1 of 2A, the serial clock SCL is applied to the terminal D2 of the DC unit 2A, and the terminal of the buffer B1 through the inverter X1.

Is connected to the control unit to control the vertical synchronizing signal VCLK, so that the mode switching is performed, and according to the mode switching, the DC unit 2A is configured to input / output information about the monitor through the serial data SDA.

Reference numerals R1 and R2 are resistors.

The operation of the conventional monitor and PC communication configured as described above will be described with reference to FIGS. 1 and 3.

First, as shown in FIG. 1, data stored in the monitor production by the mode detecting unit 2 and the switch unit 3 connected through the serial port and the parallel port of the PC 1 to be displayed or outputted on the screen. For controlling the monitor 3,

The mode sensing unit 2 enables the DDC1 / DDC2B mode switching by a signal applied to the parallel port, and the switched DDC1 / DDC2B mode is a toggle method and a signal applied through the serial port from the switch unit 3. This enables RS232C communication and DDC2B communication interface.

Therefore, by controlling the monitor 4 from the PC 1 by DDC1 / DDC2B and RS232C communication, the data stored when the monitor is manufactured is displayed on the output or the screen.

That is, as described above, RS232C communication with the DDC1 / DDC2B is enabled, so that the PC 4 receives information about the monitor 4 stored at the time of manufacture from the monitor 4 and displays it on the screen of the monitor 4. do.

Here, the mode switching of the DDC1 and DDC2 by the mode sensing unit 2 is shown in FIG.

)에 인가된다.The VCLK (V-sync), SCL (serial clock), and SDA (serial data) signals applied from the terminals P1, P2, and P3 of the PC 1 are connected to the respective terminals D1 and D2 of the DC unit 2A. When the vertical synchronization signal VCLK as shown in FIG. 3C is applied from the terminal P1 of the PC 1 to the buffer B1, the terminal P2 of the PC 1 is connected to D3). The serial clock SCL output as shown in (a) of FIG. 3 is applied to the DC unit 2 and the terminal (B1) of the buffer B1 through the inverter X1.

Is applied.

)를 디스에이블(Disable)시켜 PC(1)의 단자(P1)로 부터 버퍼(B1)로 부터 인가된 신호를 하이(H)로 만들어 디디씨부(2A)에 인가되도록 하므로서, 도 3에서와 같이 DDC1모드에서 DDC2모드로 전환된다.Here, when the serial clock (SCL) output from the PC (1) is in the high (H) state, the buffer (B1) is enabled (enable), as shown in Figure 3 because the monitor operates in the DDC1 mode Saved information is displayed on the screen when the monitor is manufactured. In the DDC1 mode, when the serial clock SCL drops from the high H to the low L as shown in FIG. 3A, the serial clock SCL is driven high through the inverter X1. Terminal H of the buffer B1

By disabling (), the signal applied from the buffer (B1) from the terminal (P1) of the PC (1) is made high (H) to be applied to the DC unit 2A, as shown in FIG. Likewise, it switches from DDC1 mode to DDC2 mode.

When the DDC1 is switched to the DDC2 mode, information stored in the monitor is output to the PC 1 through serial data SDA.

That is, when the serial clock SCL is high, the serial clock is enabled in the DDC1 mode in which the vertical synchronization signal VCLK output from the PC 1 is transmitted to the monitor by enabling the buffer B1. When (SCL) falls to low (L), disables the buffer (B1) to make the signal (VCLK) output from the PC (1) is always high (H) to enable the DDC2B communication, monitor manufacturing In addition to displaying the information entered on the screen, the new information can be transmitted to the monitor through the serial data (SDA) through the PC (1) under the control of the user.

However, since DDC2AB communication does not exist a module to interface the DDC2AB communication method, the DDC2AB data is reconfirmed through the monitor screen through the DDC2AB support card.

The interface between the conventional monitor and the PC is divided into DDC1, DDC2B, DDC2AB, and RS232C communication, and there is no module to interface the DDC2AB communication method, and the data is reconfirmed through the screen of the monitor through the DDC2AB support card. In the manufacturing process of the monitor for storing the data according to the DDC1, DDC2B, DDC2AB communication mode under the same system, the process of inputting and inspecting the DDC1, DDC2B data, the process of inputting the DDC2AB data, and the card of the DDC2AB data As it is divided into a total of three processes, such as the process of inspecting by the window screen, there is a problem that the work efficiency decreases over time as the production line and processes are divided.

In order to solve the above problems, the present invention configures the interface unit to enable all communication at the interface of the monitor, and integrates the DDC1, DDC2B, DDC2AB, and RS232C communication into one interface module to transfer to a single board. It is possible to improve the workability by shortening the production line and the manufacturing process by integrating what is divided into three processes so that the monitor manufacturing process can be communicated.

1 is a block diagram showing the communication between the conventional monitor and the PC

2 is a detailed circuit diagram of a mode sensing unit in a conventional monitor and PC communication.

3 is an output waveform diagram according to a communication mode of a conventional monitor and a PC

Figure 4 is a block diagram showing the entire communication method of the present invention monitor and PC

5 is a detailed block diagram of the communication interface of the present invention monitor and PC

6 and 7 is a signal output waveform diagram according to the communication mode in the communication interface of the present invention monitor and PC

The configuration of the integrated interface module apparatus of all the monitor type communication method of the present invention will be described with reference to FIGS. 4 and 5 as follows.

A PC 10 that outputs a vertical synchronization signal (V-Sync) and receives information about the monitor 30 and outputs a control signal for displaying the same, and a control signal applied from the PC 10. The interface unit 20 enables all communication methods by the serial clock SCL and the serial data SDA connected to the monitor 30, and is output from the PC 10 through the interface unit 20. The 24LC21 unit 31 of the monitor 30 outputs the data input during the monitor manufacture according to the control signal, and the data input during the monitor manufacture according to the DDC2AB communication method, and the data can be modified by the PC 10. It is composed of a microcomputer 32,

As shown in FIG. 5, the interface unit 20 is connected to an input / output buffer 21 for inputting / outputting SCL, SDA, and VCLK signals, and to the SCL and VCLK signal lines of the input / output buffer 21. The line control relay 22 for controlling the signal line and the data output from the monitor 30 for DDC2AB communication are read to generate a recognition signal ACK to generate an input / output card of the PC 10. (11) a data read and recognition signal (ACK) generator 23 in the DDC2AB mode for applying read data, a video input unit 24 for applying a video signal to the monitor 30, and RS232C for RS232C communication. It consists of a connector 25.

Referring to Figures 4 to 7 with respect to the pre-monitor communication method configured as described above are as follows.

First, as shown in FIG. 4, when a vertical synchronizing signal (V-sync) and a control signal are applied to the interface unit 20 from the PC 10 in a state where power is applied, the interface unit 20 All communication methods (DDC1, DDC2B) through the microcomputer 32 and the 24LC21 unit 31 of the monitor 30 connected to the serial clock (SCL) and serial data (SDA) lines while applying the vertical synchronization signal to the monitor (30). , DDC2AB, RS232C).

As shown in FIG. 5, when the power is turned on, the interface unit 20 is connected to the input / output buffer of the interface unit 20 through the digital input / output (I / O) card 11. When the vertical synchronization signal V-sync of VCLK is applied to the signal 21, the vertical synchronization signal is applied to the 24LC21 part 31 of the monitor 30 by the line control relay 22 through the input / output buffer 21. Done.

The 24LC21 unit 31 of the monitor 30 outputs information about the monitor 30 input at the time of monitor manufacture by the control signal applied from the PC 10.

To this end, the line control relay 22 that controls the VCLK and SCL lines initially connects the VCLK signal to the vertical synchronization signal V-sync of the video input unit 24 by default and inputs and outputs the SCL signal. When the power is turned on after connecting to the (21), the VCLK signal is connected to the input / output buffer 21 so that the PC 10 can control the serial clock (SCL) to high impedance, that is, high (H). Up) enables the DDC1 mode as shown in FIG.

Herein, when the operation of the DDC1 mode is completed, the PC 10 automatically outputs a serial clock signal SCL for the state of the DDC2 mode. If the monitor 30 operates only in the DDC1 mode, all operations are performed in the DDC1 mode. Is over, and if it is possible to operate in DDC2 mode, it operates accordingly.

If the monitor 30 operates in two modes (DDC1, DDC2) and three communication methods (DDC1, DDC2B, and DDC2AB), the PC 10 automatically switches to the serial clock (SCL) at the same time as the DDC1 mode operation is finished. ) Is outputted as low (L) as shown in (a) of FIG. 7 to switch to the DDC2 mode.

In this case, the line control relay 22 of the interface unit 20 connects the VCLK and SCL signals through the input / output buffer 21 to control the monitor 30 from the PC 10.

When the DDC2AB mode is switched, the mode control signal is applied by the line control relay 22 controlling the SCL and VCLK signal lines from the PC 10 to the monitor 30 through the input / output buffer 21. While outputting data to the monitor 30 as a serial data (SDA) signal,

When data is output from the monitor 30, the serial data SDA corresponding to the eighth serial clock SCL is loaded through the data read and recognition signal generator 23 in the DDC2AB mode. Parallel data is converted, and a recognition signal ACK is generated at the ninth clock SCL of the serial clock SCL to read the data output from the monitor 30 through the serial data SDA.

The read data read from the data read and recognition signal generator 23 in the DDC2AB mode is input through the input / output card 11 of the PC 10, so that the PC 10 and the monitor 30 DDC2AB communication is used to store and change data in the microcomputer 32 using the ACESS BUS form.

When inputting / outputting data through RS232C communication, the communication is performed through the connector 25 for RS232C communication.

As described above, the present invention enables the communication between the monitor and the PC to be integrated into one interface module such as RS232C, DDC1, DDC2B, DDC2AB, etc., so that one interface module can be used for various adjustments / inspections in the monitor production line. It can be utilized for communication between the system and the monitor being produced, which shortens the production line and shortens the production process.

Claims (2)

In the monitor connected to the PC and interfacing in the DD1, DDC2B, DDC2AB communication mode, A PC 10 for outputting a vertical synchronization signal and applying a control signal for receiving and displaying information about the monitor 30; An interface unit 20 connected between the PC 10 and the monitor 30 to enable all communication methods (DDC1, DDC2B, DDC2AB, RS232C); 24LC21 unit 31 for outputting information on the monitor input during the monitor manufacturing by the control signal output from the PC 10, and outputs the data input during the monitor manufacturing and modify the data in the PC (10) Integrated interface module of the whole monitor communication method, characterized in that composed of a microcomputer 32 to enable The control unit of claim 1, wherein the interface unit 20 is connected to an input / output card 11, a line signal relay 12, and a monitor 30 of the PC 10 by SCL, SDA, and VCLK signals. An input / output buffer 21 for input / output and a line for controlling the SCL and VCLK signal lines through the input / output buffer 21 to control the monitor 30 from the PC 10 according to the mode switching. The control relay 22 and the DDC2AB mode data output from the microcomputer 32 of the monitor 30 are read and a recognition signal ACK is generated to read through the input / output card 11 of the PC 10 ( Read) A data lead and signal generator 23 in DDC2AB mode for applying data, a video signal input 24 for applying a video signal to the monitor 30, and an RS232C connector 25 for RS232C communication. Integrated interface module of all monitor communication method

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