An Overview of DisplayPort Versions and Their Features.
An Overview of DisplayPort Versions and Their Features. - Table of contents:
DisplayPort is a type of digital video connection made for connecting computers to monitors, as well as certain other types of equipment. It is similar to HDMI and DVI but with some additional features, such as better audio support and longer cable lengths. There are several versions of DisplayPort, with the latest Displayport versions being v2.0, which supports 8K resolution at up to 120Hz refresh rate.
Read on to find out everything you need to know about Displayport versions, including how it works and what it can be used for.
What is a DisplayPort?
DisplayPort is a video interface that allows you to connect digital displays, especially computer monitors. This technology was developed in 2006 by the Video Electronics Standards Association, or VESA, with the aim to replace the older standards, VGA (Video Graphics Array) and DVI (Digital Video Interface).
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In the same vein as HDMI, DisplayPort can transmit both video and audio data either separately or simultaneously. These ports come in two form factors, with the first featuring 20 pins on an L-shaped connector. The second, Mini DisplayPort, debuted on Apple devices and is less common than the original, larger option, but it still has the same display output function.
Released May 2006. The bandwidth is 10.8Gbps. The maximum transmission speed of DisplayPort 1.0 is 8.64Gbit/s, and the length is 2 meters. Obsolete.
Released January 2008. DisplayPort 1.1 allows the use of other transmission media (such as optical fiber) to increase the transmission distance but does not standardize other transmission media. At the same time, HDCP is added to DisplayPort Content Protection (DPCP), which is rarely used.
Published December 22, 2009. Its biggest change is that the transmission speed is doubled to 21.6Gbit/s (High Bit Rate 2 (HBR2) mode), and supports 4K (4096X2160) 60Hz, thus supporting the higher resolution, frame rate, and color depth. The Mini DisplayPort designed by Apple is also compatible with this standard. 3D is supported. Multi-streaming is supported.
On May 12, 2012, the Video Electronics Standards Association announced that DisplayPort 1.2a added the technology “Adaptive-Sync” that can dynamically control the update rate of the display screen by the video output end so that the display screen can fully match the instructions of the video output end. Update screen.
On September 15, 2014, the Video Electronics Standards Association released DisplayPort 1.3, with a maximum bandwidth of 32.4 Gbps (HBR3), and an effective bandwidth of 25.92 Gbps after encoding, which can support 4K (3840X2160) 120hz, 5K (5120X2880) 60hz, 8K (7680X4320) 30hz.
The final version of the DP 1.4 communication port specification was in February 2016. The new standard is based on the DP 1.3 specification in September 2014. The bandwidth remains unchanged but Display Stream Compression technology and Forward Error Correction are added. , high dynamic range data package (HDR meta transport), and the sound channel is also increased to 32-channel 1536 KHz sampling rate, which will bring 8K-level (7680×4320) 60Hz output to laptops, smartphones, and AIO all-in-one machines, and 4K Can go up to 120Hz.
The DisplayPort 2.0 interface protocol was launched in 2019. The transmission bandwidth of DP 2.0 is as high as 80Gbps, which is 2.5 times that of the current DP1.4 and 1.6 times that of HDMI 2.1. It can output 16K 60Hz (DSC), 10K 60Hz lossless, 4K 240Hz, and other images on a single screen, supporting dual-screen 4K 144Hz lossless.
How does DisplayPort work?
At a basic level, DisplayPort works just like any other audio and video data connection. You plug one end of the cable into your device, be it a laptop, desktop computer, or external graphics card, and the other into your display.
The devices may detect one another and configure things automatically, but you may need to use a remote or the controls on your monitor to manually select the DisplayPort input. It’s also possible you’ll need to manually set the correct resolution and refresh rate for your display(s).
Once you’ve done that though, DisplayPort should work just fine.
If you want to know how DisplayPort works on a more technical level, it utilizes packetized data transmission in a similar manner to Ethernet cables and PCI-Express ports on a motherboard. It is able to transmit what’s known as micro packets of data, which embed a clock signal within them, thereby making for a more efficient data transfer stream that can, in turn, support higher resolutions and refresh rates.
This is a great advantage over more traditional display standards and technologies like VGA, DVI, and even HDMI. It, and the more open, expandable nature of DisplayPort, which allows it to be added to and iterated upon over time, make it arguably one of the most important display technologies of the past decade.
The benefits of DisplayPort
- Small packet-based protocol
Allows easy expansion of the DisplayPort standard
Allows multiple video streams on a single physical connection
- Designed to support the connection between internal chips
Allows direct access to display function options, enabling the removal of display control loops to produce cheaper and thinner displays. The goal is to replace the LVDS connection inside the laptop panel with a unified link interface.
- Allows backward compatibility with single DVI/HDMI; dual DVI/HDMI to analog VGA connector requires an adapter.
- Support RGB and YCbCr color space (ITU-R BT.601 and BT.709 formats).
- Auxiliary channels can be used for touch panel data, USB links, cameras, microphones, and more.
- Fewer channels and built-in clock frequency reduce radio frequency interference (RFI).
- Supports USB Type-C.
DisplayPort: For PC
DisplayPort looks similar to HDMI but is a connector more common on PCs than TVs. It still allows for high-definition video and (in many cases) audio, but its standards are a bit different.