In the industrial control industry, we know what is the difference between HDMI and VGA?

A group of people, eat a group of meals. In the industrial control industry, we must understand some common terms for professional hardware facilities. What is the difference between HDMI and VGA, do you understand? Let's follow the industrial computer manufacturers to understand the difference between HDMI and VGA one by one.

VGA is an analog signal, and HDMI is a digital signal, which can transmit audio and video signals at the same time. If the signals transmitted by the two are different, will the display effect be different? Let's take a look at the nomenclature of the two first.

VGA (Video Graphics Array) is the video graphics array, which was introduced by IBM in 1987 with PS/2 (PS/2 originally means "Personal System 2", "Personal System 2", which is a kind of system introduced by IBM in 1987. A video transmission standard that uses analog signals introduced by personal computer) has the advantages of high resolution, fast display rate and rich colors at that time, and has been widely used in the field of color displays. This standard is very outdated for today's PC market. Even so, VGA is still a standard supported by many manufacturers, and PCs must support the VGA standard before loading their own unique drivers. For example, the boot screen of Microsoft Windows series products still use VGA display mode, which also shows its importance and compatibility in display standards.

HDMI interface is High Definition Multimedia Interface, English name is: High Definition Multimedia Interface. HDMI is a digital video/audio interface technology. It is a dedicated digital interface suitable for image transmission. It can transmit audio and video signals at the same time. The highest data transmission speed is 5Gbps. Industrial computer manufacturers simply say that HDMI is connected to a monitor or TV, and is used to receive HDMI output signals on the graphics card.

In the industrial control industry, generally the resolution of the monitors we use does not need to be very high-definition, and it is almost the same to use VAG to simulate information output. In terms of cables, VGA cables are much cheaper than HDMI cables. In addition, on the interface of industrial computer manufacturers, the VGA interface is equipped with double screws, and the signal output in the industrial field is much more stable than HDMI.