Zhongyou invites you to explain the DisplayPort interface in detail


DisplayPort is also a high-definition digital display interface standard that can connect computers and monitors, as well as computers and home theaters.

In May 2006, the Video Electronics Standards Association (VESA) established version 1.0 of the standard and upgraded it to version 1.1 in 2008, providing support for HDCP. The 1.3 version has increased the total bandwidth to 32.4Gbps (4.05GB/s), with each of the four channels allocated 8.1Gbps. DisplayPort has won support from industry giants such as AMD, Intel, NVIDIA, Dell, HP, Lenovo, Philips, Samsung, AOC, and is free to use.

DP1.1

In terms of performance, DisplayPort 1.1 can support a maximum transmission bandwidth of 10.8Gb/s, while HDMI 1.3 standard can support a bandwidth of 10.2G/s; In addition, DisplayPort can support WQXGA+(2560 × 1600)、QXGA(2048 × 1536) Equal resolution and color depth of 30/36bit (10/12bit per primary color), 1920 × The 1200 resolution color support reaches 120/24Bit, and the ultra-high bandwidth and resolution are fully suitable for the development of display devices.

1. High bandwidth

When DisplayPort was first introduced, it could provide a bandwidth of up to 10.8Gbps, sufficient bandwidth to meet the demand for higher resolution in large-scale display devices in the future.

2. Maximize the integration of peripheral devices

Like HDMI, DisplayPort also allows audio and video signals to share the same cable transmission, supporting a variety of high-quality digital audio. But more advanced than HDMI, DisplayPort can also achieve more functions on a single cable. In addition to the four main transmission channels, DisplayPort also provides a powerful auxiliary channel. The transmission bandwidth of this auxiliary channel is 1Mbps, with a maximum delay of only 500 μ s. It can be directly used as a transmission channel for low bandwidth data such as voice and video, and can also be used for delay free game control. It can be seen that DisplayPort can achieve maximum integration and control of peripheral devices.

3. Integrated internal and external interfaces

There are two types of external connectors for DisplayPort: one is the standard type, similar to USB, HDMI, and other connectors; The other type is low profile, mainly aimed at applications with limited connection area, such as ultra-thin notebook computers. The maximum external distance of both types of connectors can reach 15 meters, and the relevant specifications of connectors and wiring are ready for future upgrades. Even if DisplayPort adopts the new 2X speed standard (21.6Gbps) in the future, there is no need to redesign the connectors and wiring.

In addition to connecting devices, DisplayPort can also be used as an internal interface within the device, and even as a data interface between chips. For example, DisplayPort "conspires" to replace the mainstream interface between the LCD panel and the driver circuit board - LVDS (Low Voltage Differential Signal) interface in LCD. The internal connector of DisplayPort is only 26.3mm wide and 1.1mm high, which is 30% smaller than the LVDS interface, but its transmission rate is 3.8 times that of LVDS.  

DP1.3

The total bandwidth has been increased to 32.4Gbps (4.05GB/s), with each of the four channels allocated 8.1Gbps, an increase of 50% compared to the previous DP 1.2/1.2a and three times the size of the 1.1 standard.

After eliminating various redundancies and losses, DP 1.3 can provide an actual data transmission rate of up to 25.92Gbps (3.24GB/s), which can easily handle lossless high-definition video and audio with just one data cable and support 5120 × 2880 5K level display device.

With the help of DP Multi Stream technology and VESA coordinated video timing technology, the resolution of single connected multiple displays is also supported, with each device reaching 3840 × 2160 4K level.

DP 1.3 continues to accommodate the three traditional output formats of VGA, DVI, and HDMI, and adds support for HDCP 2.2 and HDMI 2.0 CEC (Consumer Electronics Control), allowing DP to be used for playing TV content, including copy protected 4K videos.

4: The 2:0 pixel structure has also arrived, which is a video format typically consumed by digital television and can support future 8K × 4K very high definition display.

The biggest feature of DP output is its versatility and inclusiveness. Now, data transmission, A/V video transmission, and other functions can be integrated into one data line, and the protocol has been redefined. With a high bandwidth of 8.1Gbps per channel, DP 1.3 can connect a 4K ultra high definition display with a 60Hz refresh rate and 24 bit color depth using two channels, while also using the other two channels to handle other data, such as USB 3. x, DockPort base, etc.

Dongguan Zhongyou Electronics Co., Ltd. is a company that provides customers with connection system products (such as SFP/SFP+/MINI-SAS) required for information infrastructure construction, as well as communication cables and optoelectronic products, IT equipment connection cables and related supporting services.

Four major R&D centers have been established in Hangzhou, Taiwan, Hong Kong, and the United States, with first-class R&D teams and independent intellectual property rights.

The company has 5 holding subsidiaries and offices across various regions, with products sold to over 10 countries worldwide. It has cable brands HIBEST and cable assembly and connector brands HISETEC.