KR102486470B1 - Power and signal supply of the monitor using DP cable - Google Patents

Abstract

The present invention relates to a power and signal supply apparatus of a monitor using a DP cable. The power and signal supply apparatus of a monitor using a DP cable comprises: a GPU (112) which outputs an image signal; a USB block (114) which outputs a USB signal and a mouse signal into a monitor (200); a mode reading unit (140) which reads a mode of the monitor by a mode set value received from the monitor (200) and outputs a USB switching control signal into a USB DP switching unit (120) to cut off transmission of the image signal through third and fourth image signal lines (L2, L3) and output the USB signal of the USB block (114) into the monitor (200) when the mode of the monitor (200) is in a custom mode; and a USB DP switching unit (120) which is inserted into the third and fourth image signal lines (L2, L3), cuts off connection with the USB block (114) and connects the third and fourth image signal lines (L2, L3) between the GPU (112) and the monitor (200) when not receiving the USB switching control signal from the mode reading unit (140), and cuts off the third and fourth image signal lines (L2, L3) connected between the GPU (112) and the monitor (200) and connects the third and fourth image signal lines (L2, L3) adjacent to the USB block (114) and the monitor (200) when receiving the USB switching control signal from the mode reading unit (140). Accordingly, the present invention has an advantage of transmitting power, a data signal, and an image signal with a single DP cable.

Description

Power and signal supply of the monitor using DP cable}

The present invention relates to a monitor cable connection device, and in particular, a DP cable suitable for transmitting all of power, USB signals, touch input signals, and mouse input signals as well as video signals from a computer body to a monitor using only a general DP cable. It relates to a power supply and signal supply device for a monitor using

In recent POS terminals, the use of products that support touch and card readers along with images on customer monitors is increasing.

1 shows an example of a cable connection diagram for supplying a USB signal and power to support a video signal between a general computer body 10 and a monitor 20 and a touch screen.

1 shows a case in which the computer body 10 is built into the main monitor 20', and the main monitor 20' in which the computer body 10 is built and the auxiliary monitor 20 are connected by three cables (DP, U1, W1). ) is an example of the case of wiring.

The cable connected between the POS terminal body and the monitor 20, which is an example of the computer body 10, is a DP cable (Dp), which is a video cable for transmitting video signals, and transmitting USB signals, touch input signals, and mouse input signals. There is a USB cable (U1) for the monitor, an adapter (Adaptor) and a power cable (w1) for supplying power to the monitor.

Therefore, since the above three cables (Dp, U1, W1) had to be connected between the conventional general computer body 10 (eg POS terminal body) and the monitor 20, the computer body 10 (eg POS terminal body) Since I had to do cable connection work 3 times for each installation of , there was a problem that the cable connection work took time and was inconvenient.

Therefore, since the above three cables (Dp, U1, W1) had to be connected between the conventional general computer body 10 (eg POS terminal body) and the monitor 20, the computer body 10 (eg POS terminal body) Since I had to do cable connection work 3 times for each installation, there was a problem that the cable wiring work took time and was inconvenient.

In addition, even after connecting all these three cables, the three cables connected between the main body of the POS terminal and the monitor of the POS terminal were piled up, and the product appearance of the POS terminal was not good.

Document 1: Patent Registration No. 10-1194365 (Announcement date: 2012.10.25)

The present invention was created to solve the above problems of the prior art, and the purpose of the monitor's power and signal supply device using a DP cable according to the present invention is,

First, data signals (USB signal, touch input signal of the monitor, and mouse input signal) (this In the specification, it is collectively referred to as 'USB signal') and power can be transmitted,

Second, video signals, USB signals, and power can be transmitted with only one video cable, DP cable, so that the number of cables can be reduced from three to one, so that, for example, the configuration of a POS terminal can be simplified, and It makes the POS terminal wiring work (cable wiring work between the POS terminal body and the monitor) faster, simpler, and more convenient.

Third, by implementing the video signal, USB signal and power supply between the computer body (eg POS terminal body) and the monitor (eg POS terminal monitor) with only one DP cable, the cost of the POS terminal can be lowered,

Fourth, even after cable connection is complete, there is only one cable connected between the computer body (POS terminal body) and the monitor (POS terminal monitor), so a clean appearance is formed and the aesthetics of the product is improved, so that it is appropriate to increase product competitiveness. It is to provide power and signal supply devices for monitors using cables.

Power supply and signal supply device for a monitor using a DP cable according to the present invention for achieving the above object is a computer main body for transmitting a video signal to the monitor, a monitor for displaying the video signal transmitted from the computer main body, and the computer main body. A monitor cable connection device comprising a DP cable connected to a computer main body and a monitor for spiritual transmission between the main body and a monitor, wherein the first and second video signal lines among the four video signal lines of the DP cable are used to process the monitor's image processing unit. It is directly connected to and is connected to the video processing unit of the monitor via the USB DP switching unit by the third and fourth video signal lines, which are the remaining two video signal lines among the four video signal lines of the DP cable, and outputs the video signal to the monitor. The GPU (Graphic Processor Unit), the USB block that outputs the USB signal and the mouse signal to the monitor, and the mode setting value received from the monitor are received, and the mode of the monitor is read by the received mode setting value, and the mode of the monitor is determined. When it is determined that it is a custom mode, a mode reading unit outputting a USB transfer control signal to the USB DP transfer unit so that transmission of the video signal through the third and fourth video signal lines is cut off and the USB signal of the USB block is output to the monitor; It is inserted into the 3rd and 4th video signal lines and connected to the output end of the USB block, and when the USB switching control signal is not received from the mode reading unit, the connection with the USB block is disconnected and the 3rd and 4th video signal lines between the GPU and the monitor is connected so that the video signal of the GPU can be transmitted to the monitor through the third and fourth video signal lines, and when the USB transfer control signal is received from the mode reading unit, the third and fourth video signal lines connected between the GPU and the monitor disconnect the USB block and connect the 3rd and 4th video signal lines on the monitor side so that the video signal of the GPU is not transmitted to the monitor through the 3rd and 4th video signal lines, and the USB signal of the USB block is transmitted to the monitor. and the 4 pins of the DP cable Among the phase signal lines, the first and second video signal lines directly connect the GPU and the image processing unit of the monitor, and among the four video signal lines of the DP cable, the third and fourth video signal lines pass through the USB DP switching unit to the GPU and the video processing unit of the monitor. It is characterized in that for connecting.

In the device for power and signal supply of a monitor using a DP cable according to an embodiment of the present invention, the computer body is a POS terminal body, and the monitor is a POS monitor.

The power and signal supply device of the monitor using the DP cable of the present invention having the above configuration has the following effects.

First, data signals (USB signal, touch input signal of the monitor, and mouse input signal) and power are supplied only with the DP cable, which is a video cable that was connected for video transmission between the computer body (eg, POS terminal body) and the monitor (eg, POS terminal monitor). There is an effect that can transmit.

Second, it has the effect of reducing the number of cables from three to one by allowing video signals, USB signals, and power to be transmitted with only one video cable, DP cable, and as a result, for example, the configuration of a POS terminal can be simplified. There is an effect that can be performed, and the POS terminal wiring work (cable wiring work between the POS terminal body and the monitor) can be performed more quickly, simply, and conveniently.

Third, by implementing the video signal, USB signal and power supply between the computer body (eg POS terminal body) and the monitor (eg POS terminal monitor) with only one DP cable, the cost of the POS terminal can be lowered and product competitiveness can be increased It works.

Fourth, since there is only one cable connected between the computer body (POS terminal body) and the monitor (POS terminal monitor) even after the cable connection is completed, a neat appearance is formed and the aesthetics of the product are improved, which has the effect of increasing product competitiveness.

1 is an example of a cable connection diagram for supplying a USB signal and power to support a video signal between a general computer body 100 and a monitor 200 and a touch screen.
2 is a block diagram of a power supply and signal supply device of a monitor using a DP cable according to an embodiment of the present invention.

Next, a preferred embodiment of a monitor power and signal supply device using a DP cable according to the present invention will be described in detail with reference to the accompanying drawings.

The power supply and signal supply device of the monitor using the DP cable according to the present invention can be referred to as a monitor cable connection device.

In addition, the device for supplying power and signals of a monitor using a DP cable according to the present invention may also be referred to as a device for controlling power and signal supply of a monitor using a DP cable.

The 'monitor mode' described in the specification represents the interface type of the cable port (connector) connected to the monitor, and includes a DP mode, a High Definition Multimedia Interface (HDMI) mode, and a custom mode.

'DP mode' is a mode that uses a DP cable (connector),

'HDMI mode' is a mode that uses an HDMI cable (connector).

'Custom mode' is a monitor cable to which the power supply and signal supply device of the monitor using the DP cable according to the present invention is applied. It is used for transmitting video signals, and the remaining two video signal lines are cables (connectors) that can be used for transmitting USB signals, mouse signals, and touch input signals.

An apparatus for supplying power and signal to a monitor using a DP cable according to an embodiment of the present invention includes a computer main body 100 that transmits a video signal to a monitor 200 and a video signal transmitted from the computer main body 100. A monitor cable comprising a monitor 200 for display and a DP cable (Dp) connected to the computer main body 100 and the monitor 200 for Youngsan transmission between the computer main body 100 and the monitor 200. In the connection device, the video processing unit 210 of the monitor 200 is directly connected to the first and second video signal lines L0 and L1 among the four video signal lines L0, L1, L2 and L3 of the DP cable Dp. connected, and the USB DP switching unit 120 is connected by the third and fourth video signal lines (L2, L3), which are the remaining two video signal lines among the four video signal lines (L0, L1, L2. L3) of the DP cable (Dp). It is connected to the image processing unit 210 of the monitor 200 via a GPU (Graphic Processor Unit) 112 that outputs an image signal to the monitor 200, and a USB signal and a mouse signal to the monitor 200. When receiving the output USB block 114 and the mode setting value received from the monitor 200, reading the mode of the monitor based on the received mode setting value, and reading that the mode of the monitor 200 is a custom mode In this case, transmission of the video signal to the monitor 200 through the third and fourth video signal lines L2 and L3 is cut off, and the USB transfer control signal is transmitted to the USB DP so that the USB signal of the USB block 114 is output to the monitor 200. The mode reading unit 140 outputs to the switching unit 120, is inserted into the third and fourth image signal lines L2 and L3, and is connected to the output terminal of the USB block 114, so that the mode reading unit 140 ) If the USB transfer control signal is not received, the connection with the USB block 114 is disconnected and the third and fourth image signal lines L2 and L3 between the GPU 112 and the monitor 200 are connected to connect the third and fourth video signal lines L2 and L3. The video signal of the GPU 112 also through the video signal lines L2 and L3. is transmitted to the monitor 200, and when the USB transfer control signal is received from the mode reading unit 140, the third and fourth video signal lines L2 connected between the GPU 112 and the monitor 200, L3) is disconnected and the USB block 114 and the third and fourth video signal lines L2 and L3 of the monitor 200 are connected, and the video of the GPU 112 is transmitted through the third and fourth video signal lines L2 and L3. It is characterized in that it is configured to include a USB DP switching unit 120 so that the signal is not transmitted to the monitor 200 and the USB signal of the USB block 114 is transmitted to the monitor 200.

And, in the power and signal supply device for a monitor using a DP cable according to an embodiment of the present invention, two first and second out of four video signal lines (L0, L1, L2.L3) of the DP cable (Dp) The video signal lines (L0, L1) directly connect the GPU 112 and the image processing unit 210 of the monitor 200, and the remaining 2 out of the four video signal lines (L0, L1, L2.L3) of the DP cable (Dp). The third and fourth image signal lines (L2, L3) are characterized in that they connect the GPU 112 and the image processing unit 210 of the monitor 200 via the USB DP switching unit 120.

According to this, in order to transmit a USB signal, a touch input signal of a monitor, and a mouse input signal (referred to generically as 'USB signal' in this specification), these signals can be transmitted only with a previously installed DP cable without having to separately prepare a USB cable as in the prior art. be able to transmit.

That is, among the four Youngsan signal lines that transmit video signals in the existing DP cable (Dp), only two video signal lines are used for video signal transmission based on the mode of the monitor, and the remaining two video signal lines are used to transmit USB signals. become available

In the 'custom mode', a mode setting value received from the mode setting unit 230 described below of the monitor 200 may be, for example, a logic signal High, High.

In the DP mode, the mode setting value received from the mode setting unit 230 described below of the monitor 200 is, for example, a logic signal Low, Low.

In the HDMI mode, the mode setting values received from the mode setting unit 230 described below of the monitor 200 are, for example, logic signals High and Low.

In the device for power and signal supply of a monitor using a DP cable according to an embodiment of the present invention, the computer body 100 is a POS terminal body, and the monitor 200 is a POS monitor 200.

Therefore, in this case, the power and signal supply device of the monitor using the DP cable according to an embodiment of the present invention becomes the power and signal supply device of the POS terminal monitor using the DP cable.

In the device for power and signal supply of a monitor using a DP cable according to an embodiment of the present invention, the USB DP switching unit 120 includes signals (USB and mouse output signals) output from the USB block 114 and the monitor In order to switch the touch input signal transmitted from the touch circuit unit 220 of (200), it is connected to the USB block 114 through the USB wire 151.

In the apparatus for supplying power and signal of a monitor using a DP cable according to an embodiment of the present invention, the monitor power supply unit 116 outputs voltage and current for operating the monitor 200 to the monitor 200, and the monitor It is connected to the power supply unit 116 and is branched and connected to the data signal lines C1 and C2 in the DP cable Dp, and is switched on when receiving a power supply control signal from the mode reading unit 140 to monitor power supply unit ( 116) to the monitor 200 through the data signal lines C1 and C2 in the DP cable Dp, the power supply controller 130 is further included.

At this time, the mode reading unit 140 receives the mode setting value received from the monitor 200, reads the mode of the monitor based on the received mode setting value, and sets the mode received from the mode setting unit 230. When it is determined that the mode of the monitor is the custom mode because the values are all logic signals Hihg, a power supply control signal is output to the power supply controller 130 so that the operating voltage and current are supplied to the monitor 200.

Therefore, power can be supplied to the monitor using the existing DP cable (Dp) without a separate adapter and power cable for power supply.

In the device for power and signal supply of a monitor using a DP cable according to an embodiment of the present invention, the DP cable (Dp) is connected to the GPU 112 and the mode setting unit 230 provided in the monitor 200, Data data signal lines (C1, C2) through which setting signals are transmitted are provided, one end is connected to the monitor power supply unit 116, and the other end is branched to the data data signal lines (C1, C2) provided in the DP cable (Dp). The power line 152 connected thereto is further included, and the power supply control unit 130 is inserted into the power line 152 to convert the power output from the monitor power supply unit 116 to data of the DP cable (Dp). It is characterized in that the supply of power to the monitor 200 is controlled through the signal lines C1 and C2.

With a simple configuration, it is possible to control the supply of power to the monitor 200 through the data signal lines C1 and C2 of the DP cable Dp.

Of course, the USB wire 151 and the power line 152 may be implemented by a wire or a copper foil pattern.

In the device for power and signal supply of a monitor using a DP cable according to an embodiment of the present invention, the mode setting values (CONFI 1, 2) set by an external user are set and stored in the monitor 200, for example, A mode setting unit 230 is provided to transmit the stored mode setting value to the mode reading unit 140, and the mode reading unit 140 receives the mode setting value from the mode setting unit 230. It is characterized in that the mode of the monitor is read by the received mode setting value.

The mode of the monitor set by the mode setting unit 230 is, for example, DP mode that can be set to logic signal 0,0, HDMI mode that can be set to logic signal 1,0, for example, and logic signal 1, for example. As described above, there is a custom mode that can be set to ,1.

In the apparatus for supplying power and signals of a monitor using a DP cable according to an embodiment of the present invention, the power supply control unit 130 receives a power supply control signal from the mode reading unit 140 and uses the DP cable (Dp The monitor power (e.g., 12V, 1A) of the monitor power supply unit 116 is supplied to the monitor 200 through the data signal lines C1 and C2 of ), and at this time, the monitor 200 supplied with power performs internal initialization, When the initialization is completed, a HPD (Hot Plug Detect) signal is applied to the computer body 100,

The power supply control unit 130 maintains power supply to the monitor 200 when HPD (Hot Plug Detect) is received from the monitor 200 within a standard time stored therein, and monitors within the standard time ( 200), the monitor power supply unit 116 cuts off the power supplied to the monitor 200 through the data signal lines C1 and C2.

In the apparatus for supplying power and signals of a monitor using a DP cable according to an embodiment of the present invention, when the power supply control unit 130 receives a power supply control signal from the mode reading unit 140, a trigger signal and, after outputting the trigger signal, drives an internal timer, and stops the output of the switching on trigger signal when the HPD signal is not received from the monitor 200 within a reference time set therein ( 131) and a switching unit 132 that is switched on by a trigger signal received from the trigger unit 131 and controls the supply of power output from the monitor power supply unit 116 to the monitor 200. It is characterized in that it is composed of.

In the device for power and signal supply of a monitor using a DP cable according to an embodiment of the present invention, the DP cable (Dp) is connected to the image processing unit 210 and the GPU 112 to transmit the HPD signal HPD signal line (H1 ) is provided, and an HPD branch line H2 branched from the HPD signal line H1 provided in the DP cable Dp and connected to the trigger unit 131 is further included, and the trigger unit 131 ) is characterized in that the HPD signal is received through the HPD branch line (H2).

The mode reading unit 140 is provided by being inserted into the data signal lines C1 and C2 connected between the GPU 112 and the mode setting unit 230, and is received from the mode setting unit 230 of the monitor 200. When it is determined that the mode of the monitor 200 is the DP mode or the HDMI mode because one mode setting value is not, for example, the logic signal High, High, that is, the logic signal Low, Low or High, Low, through the data signal line C1. Characterized in that a mode state signal (logic signal Low, Low or High, Low) is transmitted to the GPU 112.

Therefore, in this case, the mode reading unit 140 does not output a USB transfer control signal to the USB DP transfer unit 120 and does not output a power supply control signal to the power supply control unit 130, specifically, the trigger unit 131. do.

On the other hand, the GPU 112 will process the video signal according to the DP standard when receiving the logic signals Low and Low, and process the video signal according to the HDMI standard when receiving the logic signals High and Low.

In the apparatus for power and signal supply of a monitor using a DP cable according to an embodiment of the present invention, two data signal lines (C1, C2) is connected, and one data signal line is connected between the mode reading unit 140 and the GPU 112, and the power supplied from the monitor power supply unit 116 passes through the two data signal lines C1 and C2. It is characterized in that it is distributed and supplied.

Meanwhile, the monitor 200 includes a touch circuit unit 220 for receiving a USB signal and processing a touch input signal.

In the device for power and signal supply of a monitor using a DP cable according to an embodiment of the present invention, the GPU 112, the USB block 114, the monitor power supply 116, the USB DP switching unit 120 and the power The supply control unit 130 and the mode reading unit 140 are provided in the computer body 100.

In addition, the GPU 112, the USB block 114, and the monitor power supply unit 116 may be mounted on one first PCB board M1, and the USB DP switching unit 120 and the power supply control unit 130 And the mode reading unit 140 may be mounted on another second PCB board (M2) and provided in the computer body (100).

Here, the first PCB board M1 may be referred to as an image processing board on which the GPU 112 is mounted.

Alternatively, depending on the embodiment, the first PCB mode M1 and the second PCB board may be configured as one PCB board, and in any case, it is of course within the technical scope of the present invention.

Thus, preferred embodiments according to the present invention have been reviewed, and it is common knowledge in the art that the present invention can be implemented in other specific forms other than the above-described embodiments without changing its technical spirit or essential characteristics. It is self-evident to those who have Therefore, the foregoing embodiments should be understood as illustrative rather than restrictive.

The scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts thereof should be construed as being included in the scope of the present invention.

Dp: DP cable
L0,L1: 1st and 2nd video signal lines of DP cable
L2,L3: 3rd and 4th video signal lines of DP cable
C1,C2: Data signal line of DP cable
H1: HPD signal line H2: HPD branch line
100: computer body 112: GPU
114: USB block 116: monitor power output unit
120: USB DP switching unit 130: power supply control unit
131: trigger unit 132: switching unit
140: mode reading unit 151: USB lead wire
152: power line 200: monitor
210: image processing unit 220: touch circuit unit
230: mode setting unit

Claims (6)

The computer main body 100 that transmits the video signal to the monitor 200, the monitor 200 that displays the video signal transmitted from the computer main body 100, and the computer main body 100 and the monitor 200 are connected together. In the monitor cable connection device consisting of a DP cable (Dp) connected to the computer body 100 and the monitor 200 for transmission,
Among the four video signal lines (L0, L1, L2. L3) of the DP cable (Dp), the first and second video signal lines (L0, L1) are directly connected to the image processing unit 210 of the monitor 200, and the DP cable (Dp) by way of the 3rd and 4th video signal lines (L2, L3) which are the remaining 2 video signal lines (L0, L1, L2.L3) of the 4 video signal lines (L0, L1, L2. A GPU (Graphic Processor Unit) 112 that is connected to the image processing unit 210 and outputs an image signal to the monitor 200,
A USB block 114 outputting a USB signal and a mouse signal to the monitor 200;
A mode setting value received from the monitor 200 is received, the mode of the monitor is read based on the received mode setting value, and when it is determined that the mode of the monitor 200 is a custom mode, the third and fourth video signal lines ( The transmission of video signals through L2 and L3 is cut off and the mode reading unit 140 outputs the USB transfer control signal to the USB DP switching unit 120 so that the USB signal of the USB block 114 is output to the monitor 200. ,
It is inserted into the third and fourth video signal lines (L2 and L3) and connected to the output terminal of the USB block 114, and when the USB switchover control signal is not received from the mode reading unit 140, the USB block 114 ) is disconnected and the third and fourth video signal lines L2 and L3 between the GPU 112 and the monitor 200 are connected, and the video signal of the GPU 112 is also passed through the third and fourth video signal lines L2 and L3. is transmitted to the monitor 200, and when the USB transfer control signal is received from the mode reading unit 140, the third and fourth video signal lines L2 connected between the GPU 112 and the monitor 200, L3) is disconnected and the USB block 114 and the third and fourth video signal lines L2 and L3 of the monitor 200 are connected, and the video of the GPU 112 is transmitted through the third and fourth video signal lines L2 and L3. It is configured to include a USB DP switching unit 120 so that the signal is not transmitted to the monitor 200 and the USB signal of the USB block 114 is transmitted to the monitor 200,
Among the four video signal lines (L0, L1, L2.L3) of the DP cable (Dp), the first and second video signal lines (L0, L1) directly connect the GPU 112 and the image processing unit 210 of the monitor 200. do,
Of the four video signal lines L0, L1, L2. Power and signal supply device of a monitor using a DP cable, characterized in that for connecting the image processing unit 210 of (200).
The method of claim 1,
A monitor power supply unit 116 outputting voltage and current for operating the monitor 200 to the monitor 200;
It is connected to the monitor power supply unit 116 and is branched and connected to the data signal lines C1 and C2 in the DP cable Dp, and is switched on when receiving a power supply control signal from the mode readout unit 140 to monitor power A power supply controller 130 for supplying power from the supply unit 116 to the monitor 200 through the data signal lines C1 and C2 in the DP cable Dp is further included,
The mode reading unit 140 receives the mode setting value received from the monitor 200, reads the mode of the monitor based on the received mode setting value, and determines that the mode of the monitor 200 is a custom mode. , Power and signal supply device for a monitor using a DP cable, characterized in that for outputting a power supply control signal to the power supply control unit 130 so that the operating voltage and current are supplied to the monitor 200.
The method of claim 2,
The DP cable (Dp) is provided with data signal lines (C1, C2) connected to the mode setting unit 230 provided in the GPU 112 and the monitor 200 and transmitting the mode setting signal,
A power line 152 having one end connected to the monitor power supply unit 116 and the other end branched and connected to the data signal lines C1 and C2 provided in the DP cable Dp is further included.
The power supply control unit 130 is inserted into the power line 152, and transfers the power output from the monitor power supply unit 116 to the monitor 200 through the data signal lines C1 and C2 of the DP cable Dp. Power and signal supply device of the monitor using a DP cable, characterized in that for controlling the supply of.
The method of claim 3,
The monitor 200 has set and stored mode setting values (CONFI 1 and 2), and is provided with a mode setting unit 230 that transmits the stored mode setting values to the mode reading unit 140,
The mode reading unit 140,
Power and signal supply device of a monitor using a DP cable, characterized in that for receiving the mode setting value from the mode setting unit 230, and reading the mode of the monitor by the received mode setting value.
The method of claim 2,
The power supply control unit 130,
By receiving a power supply control signal from the mode reading unit 140
After supplying the monitor power (12V, 1A) of the monitor power supply unit 116 to the monitor 200 through the data signal lines (C1, C2) of the DP cable (Dp),
When a Hot Plug Detect (HPD) is received from the monitor 200 within the internally stored reference time Tc, power supply to the monitor 200 is maintained,
When the HPD signal is not received from the monitor 200 within the reference time (Tc), power supplied from the monitor power supply unit 116 to the monitor 200 through the data signal lines C1 and C2 is cut off. Power and signal supply of monitor using DP cable.
The method of claim 5,
The power supply control unit 130,
When a power supply control signal is received from the mode reading unit 140, a trigger signal is output, and after outputting the trigger signal, an internal timer is driven,
When the HPD signal is not received from the monitor 200 within a reference time set therein, a trigger unit 131 for stopping the output of the switching on trigger signal;
It is switched on by the trigger signal received from the trigger unit 131 and is configured to include a switching unit 132 that controls power output from the monitor power supply unit 116 to the monitor 200. Power and signal supply of monitor using DP cable.

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