How many interfaces does a computer display have?

A monitor that may have display output ports including HDMI, DVI, VGA, DP, and additional ports such as USB, audio, and USB-HUB.?

The VGA interface, a common interface, has been used from the CRT era to the present. It is a color difference analog transmission interface, D-type port, there are 15 holes on it, respectively, transmitting different signals, in addition VGA interface is also known as D-Sub interface.

VGA is currently the most widely used monitor interface, almost the vast majority of low-end monitors with VGA interface, but also because of its shortcomings are more obvious, high resolution can not reach the refresh rate and only image input without sound input, making it difficult to play in the middle and high-end monitors.

DVI (Digital Visual Interface[1]) is the Digital Video Interface. It is 1999 by Silicon Image, Intel (Intel), Compaq (Compaq), IBM, HP (Hewlett-Packard), NEC, Fujitsu (Fujitsu) and other companies *** with the composition of the DDWG (Digital Display Working Group, the Digital Display Working Group) to introduce the interface standard. DVI interface is more complex, mainly divided into three types. The interface is more complex, mainly divided into three kinds, DVI-A, DVI-D and DVI-I. And DVI-D and DVI-I have single-channel and dual-channel points.

DVI transmits digital signals, digital image information does not need to go through any conversion, it will be directly transmitted to the display device, thus reducing the digital ?ú analog ?ú digital cumbersome conversion process, greatly saving time, so it is faster, effectively eliminating the phenomenon of shadow dragging, and the use of DVI for data transmission, the signal does not attenuate, the color is more pure, more realistic, the same currently Widely used.

HDMI interface:

High Definition Multimedia Interface (English: High Definition Multimedia Interface, HDMI) is a digital video/audio interface technology, is suitable for image transmission of the special type of digital interface, which can be simultaneously transmitted audio and video signals, the highest data transfer rate of 2.25GB/s

The DP interface, the successor to DVI, is now available in DisplayPort and Apple's miniDP. DP interfaces are much more advanced than DVI, with qualitative changes in bandwidth and customizability.

Currently, the latest 1.3 standard for the DP interface can reach speeds of up to 21.6Gb/s, and the resolution can directly support up to 4K, which is mainly used in PCs, which is why current 4K displays all use the DP interface.

USB and audio interface:

Now, more and more monitors, also began to configure the USB interface, and still the latest USB3.0 interface, for most of the monitor, the configuration of the USB just let the monitor has a USB HUb function. By connecting the uplink USB port to the PC host, users can easily connect to their computer via the monitor's downlink USB port.