History of DisplayPort - Semiconductor Business -Macnica

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Basic Interface Parade Technologies

What is DisplayPort?

DisplayPort is a digital interface standard primarily used to transmit high-quality video and audio between computers and video output devices such as displays, televisions, and projectors.

This article details DisplayPort's main features, advantages, and versions.

Main features

1. High Bandwidth:
DisplayPort is designed to transmit 4K and 8K resolution video at high refresh rates, with the latest standards capable of supporting 8K@60Hz and 4K@120Hz.
2. Multi-Stream Transport (MST):
　 DisplayPort allows you to connect multiple displays through a single port, making it possible to connect multiple monitors in series from a single DisplayPort output.
3. Audio Support:
DisplayPort can transmit not only video but also multi-channel audio. Like HDMI, it can transmit video and audio simultaneously over a single cable.
4. Connector type:
DisplayPort comes in different size connectors (standard and mini) to accommodate different devices.
5. Daisy Chain Connection:
By using MST, you can chain multiple displays from a single PC, making it easier to tidy up the cables around your desk.
6. Compatibility:
With the use of adapters, DisplayPort can be made compatible with other interfaces such as HDMI, DVI and VGA.

advantage

1. High image quality:
DisplayPort supports higher resolutions and frame rates, making it ideal for gaming or high-resolution work.
2. Multifunction:
Multi-monitor setup is easy, improving work efficiency.
3. Future Prospects:
DisplayPort is constantly evolving and adapts quickly to new technologies, so it is likely to remain popular for a long time to come.

version

DisplayPort is updated periodically, with each version offering improved functionality and performance. The main versions are as follows:

Version	Overview
DisplayPort 1.0	This is the first version of DisplayPort announced by VESA on May 3, 2006. It allows data transmission at up to 8.64 Gbps, but cable length is limited to 2m.
DisplayPort 1.1	An improved version of DisplayPort announced on April 2, 2007. It allows for the implementation of alternative link layers, including fiber optics, allowing transmission over distances of more than 2m without signal degradation between source and display. This version relaxes the distance constraints.
DisplayPort 1.1a	DisplayPort 1.1a, released on January 11, 2008, was revised to correct errata items and add clarifications to DisplayPort 1.1.
DisplayPort 1.2	DisplayPort 1.2, which became the official standard on December 22, 2009, achieved a maximum transfer speed of 5.4Gbps in total over 4 lanes to support 3D video and a resolution of 3,840 x 2,160 pixels. In addition, the conventional 1Mbps control signal line was made faster, mini connectors were made official, and support for multiple output to multiple monitors was added.
DisplayPort 1.2a	DisplayPort 1.2a, officially announced on May 12, 2012, adds Adaptive-Sync to the specification, which is the difference between DisplayPort 1.2 and DisplayPort 1.2, which does not include Adaptive-Sync.
DisplayPort 1.3	DisplayPort 1.3, officially announced on September 15, 2014, has been expanded from the conventional DisplayPort 1.2's 5.4Gbps x 4 lanes (total 21.6Gbps) to 8.1Gbps x 4 lanes (total 32.4Gbps), achieving a 50% increase in bandwidth. This makes it possible to transmit 5K (5120 x 2880 dots) or dual 4K (3840 x 2160 dots) displays over a single cable. The throughput for uncompressed video is 25.92Gbps.
DisplayPort 1.4	DisplayPort 1.4, officially announced on March 1, 2016, supports the lossy compression Display Stream Compression (DSC) 1.2 and supports signals up to 8K/60Hz, 4K/120Hz, and High Dynamic Range (HDR).
DisplayPort 1.4a	DisplayPort 1.4a, officially announced on April 19, 2018, strengthens and improves the functions of DisplayPort 1.4 and introduces the specification of the "DP8K Certified DisplayPort Cable," a DisplayPort cable guaranteed to support HBR (High Bit Rate) 3. It also includes enhanced functions such as DSC, a data compression technology, FEC, an error correction technology, and MST (Multi-Stream Transport), which enables connection to multiple DisplayPort-equipped displays from a single terminal.
DisplayPort 2.0	DisplayPort 2.0, officially announced on June 26, 2019, is a major evolution from DisplayPort 1.4a, with the maximum bandwidth increased from 25.92Gbps to 77.4Gbps. The maximum refresh rate at 4K HDR resolution is now 144Hz, and the maximum resolution on a single display is now 16K (15,360 x 8,460 pixels) / 60Hz.
DisplayPort 2.1	Officially announced on October 17, 2022, DisplayPort 2.1 improves bandwidth and data transfer efficiency by adopting a more efficient encoding process, raising the maximum bandwidth to 80Gbps. DisplayPort 2.1 uses four UHBR (Ultra-High Bit Rate) data lanes, and such bandwidth enables high resolution, high refresh rate, and deep color depth.
DisplayPort 2.1a	DisplayPort 2.1a, officially announced on January 8, 2024, updates the standard for UHBR (ultra-high bit rate) cables for transmitting high-resolution video, making it possible to transmit "8K4K (7680 x 4320 pixels) / 120Hz" and "8K2K (7680 x 2160 pixels) / 240Hz" videos using a 2m passive cable.