Basic Knowledge of Industrial Computers (Display Interfaces)

There are a variety of standards which apply to display interfaces, and it is important to understand the characteristics and differences of each in order to select an appropriate output terminal.
This page explains the characteristics of the main video input interfaces that are installed in embedded computers and industrial PCs.

DisplayPort

This is the video I/O interface standard that was formulated by the standardization organization VESA.
It is the successor standard for DVI that connects computers with LCD displays and other digital display devices. Video, audio, and control signals can be sent and received using a single cable. A latch is included and fastens the cable, so it does not become disconnected. Beginning from version 1.2, multi stream transfer (MST) is supported, and it became possible to connect multiple displays in series.

Version Functions
1.1a Maximum resolution: 4K (3840x2160) @30 Hz
1.2 Maximum resolution: 4K (3840x2160) @75 Hz / 5K (5120x2880) @30 Hz Multi stream transfer (MST)

Single Mode and Dual Mode

Starting from version 1.2, DisplayPort includes Single Mode and Dual Mode. Whether Single Mode or Dual Mode is used depends on the computer.
Dual Mode also supports DVI/HDMI digital signal output and can send video to a DVI/HDMI input device via a passive type converter cable or adapter that does not perform any processing of the signal.
Because Single Mode does not support DVI/HDMI digital signal output, it requires an active type converter cable or adapter that converts the signal to DVI/HDMI when sending video to a DVI/HDMI input device.

DisplayPort Alternate Mode (DP Alt Mode)

This is the standard for output of DisplayPort signals from a USB Type-C port. Devices which comply with this standard can exchange USB signals, DisplayPort signals, and power using a single cable.

DisplayPort

DVI

This is an acronym for Digital Visual Interface and is the video I/O interface standard that was formulated by the standard creation organization DDWG.
It is a standard for connecting computers with LCD displays and other digital/analog display devices. The connector can be fastened with locking screws so that the cable does not become disconnected.

Standard Connector Functions
DVI-I DisplayPort Supports both digital signals and analog signals. When the signal is converted to a 15-pin HD-SUB connector using a DVI-analog RGB adapter, it is possible to also connect to analog RGB input displays.
DVI-D DisplayPort Supports digital signals only.

DisplayPort

Analog RGB

This is the video I/O interface standard for analog signal systems.
This standard was formulated for CRT (cathode ray tube) monitors, and involves sending and receiving a video signal for each RGB (red, green, blue) color, as well as signals for vertical synchronization and horizontal synchronization. Because it has been used as the standard for PC/AT compatible machines that have VGA standard graphics functions, it is also known as “VGA interface.” The connector shape is the D-SUB standard 3 rows of 15 pins (mini D-SUB15).

Analog RGB

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