Most digital enthusiasts know the type-C interface, and it is estimated that it started with Android phones in 2015.

However, it is estimated that many users do not know that there is also a type-C interface on the computer monitor.

If you are a new friend who wants to buy a monitor, you can take a look at the introduction of the most common interfaces of the monitor. Combined with the equipment you own or are going to buy, you can be more practical in choosing a monitor.

What are the general interfaces on the monitor?

Generally, there are several kinds of interfaces on the new monitors: HDMI, DP, usb-a, usb-c, 3.5mm and power interface. The interfaces of older schools, such as VGA interface and DVI interface, have rarely appeared on the current monitors.

Like USB protocol, HDMI interface has several different protocols: hdmi1.1/1.2, hdmi1.3, hdmi1.4, hdmi2.0, hdmi2.1.

For example, the HDMI interface of newer displays is generally above the standard of hdmi1.4 protocol. Hdmi1.4 can support 3840x2160p / 30Hz or 4096 × 2160p / 24Hz video specifications of 10.2gbps bandwidth at most.

Hdmi2.0 adds 4K / 60Hz video transmission with 18gbps bandwidth, while the latest hdmi2.1 adds 10K / 120Hz video transmission with 48Gbps bandwidth.

Since its birth in 2006, DP interface has evolved seven generations of update iterations. As early as 2009, dp1.2 has supported 21.6gbps dci-4k (4096×2160) 60Hz video.

Dp1.3 supports 4K (3840×2160) 120Hz, 5K (5120×2880) 60Hz and 8K (7680×4320) 30Hz, dp1.4 supports 8K level (7680×4320) 60Hz output.

The latest dp2.0 goes further than the previous generation, supporting full-color 4:4:4 resolution, including 30 bits per pixel (BPP), and hdr-10.

Introduction and application scenarios of the most common interfaces for purchasing computer monitor

Type-C interface is not equal to USB3.0 interface

The first thing to know is that not all type-C interfaces are USB3.0 interfaces.

Type-C interface is an interface form and an external physical form, while USB3.0 is a transport protocol and an internal transport protocol. For example, the type-C interface on many mobile phones still only supports USB2.0 protocol.

Let’s talk about the most common protocols of USB. Since the release of usb1.0 in 1996, the USB interface has gone through 24 years.

Among the iterations of so many versions, the most common ones are USB2.0, USB3.0 and usb3.1. USB2.0 supports 480mbps (now called hi speed, about 57mb / s).

While USB3.0 supports 5Gbps transmission, usb3.1 goes to 10Gbps, and the power supply capacity also reaches 100W, which belongs to fast charging interface. In fact, usb3.1 is divided into GEN1 and Gen2, and the speed will be slightly different. I won’t talk about it here.

With so many interfaces mentioned above, why should we introduce the transmission rate?

Because in addition to the computer output, display terminals such as the monitor and the wire connecting the computer to the monitor must meet the corresponding bandwidth and video specifications, so as to ensure that you have a complete experience.

Since the release of usb-c specification in 2014, many Android mobile phones, laptops, desktops, monitors and even game machines, such as Nintendo swtich, have started to use this interface.

In terms of transmission rate, in addition to the most common USB2.0 and 3.0 mentioned above, the latest usb4.0 supporting 40Gbps bandwidth and lightning 3 protocol with the same 40Gbps bandwidth can also be integrated into the type-C interface.

In addition to using large bandwidth to transfer files, audio and video, it also supports up to 100W (20V / 5A) of charging power, plus small size, pluggable front and back.

So this is a very good solution. At present, many mobile phone and computer manufacturers are also making efforts on this interface. So back to the display, what are the specific application scenarios for the display?

What are the application scenarios of the display’s type-C interface?

The most convenient application scenario should be through the type-C interface of the monitor and connected to the type-C interface of the notebook through a C-C wire. Now, in addition to Apple’s MacBook, many laptops in the windows camp also support 65W charging through the type-C interface.

If you have a monitor with type-C interface at home or in the company, you can buy one less HDMI cable and one less laptop charger when you go home or back to the company.

This is very practical for the pursuit of clean desktop friends, otherwise why so many people are using wireless keyboard and wireless mouse?

One less wire is a contribution to the wireless and simple desktop. Of course, the type-C interface mentioned above needs to be a fully functional interface.

The second application scenario is to transmit video signals and power to the iPad through the type-C interface, so that the iPad can improve its productivity to a certain extent.

When we talk about the iPad as a productivity tool, it is often questioned in terms of product performance, screen size and keyboard touch experience.

If the iPad is extended with a large screen, the productivity will be improved to a certain extent.

The third application scenario can expand a large screen for Android mobile phone through type-C interface and C-C wire. This kind of mobile phone generally has two modes: mobile phone mode and computer mode.

Mobile phone mode means that the screen displayed on the display is consistent with the content on the mobile phone, while computer mode is similar to the “extended mode” in the dual screen of the computer. At this time, you can use the mobile phone screen as the touchpad of the mouse to operate the mobile app just like the computer software.

It is estimated that few people will use this application scenario, but in some large-scale meetings, you can use this to project mobile phone content to the large screen, which is convenient for people in the meeting room to watch. This is an application scenario that I think of.


For a display, the most common types of interfaces are briefly introduced to you. For some high-end or commercial displays, there will also be a full-featured type-C interface.

Whether it’s promoting wireless desktop, or improving the productivity of notebook and iPad, this interface is powerful and small.

For the type-C interface, if you have any application scenarios in mind, you can also leave a message in the comment area.

Editor in charge ajx

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