How to build a LED Display Screen

Do you know everything about LED displays, except how they work? Well, to understand how a device works, one has to discover the components used in its building/manufacturing.

So, when it comes to the effective and advanced working of LED display screens, it’s mainly all about the LED display parts that are used inside. Now don’t worry if you aren’t aware of what these LED display parts may be, as we’re here to help you discover them in detail. So, let’s get to it, shall we?

The Components

  • The Metal Frame

His is the most basic and obvious component of an LED display. Now the inner frame of the indoor LED screen is built with an Al alloy. Whereas, the external frame of the screen is made of either stainless steel or a brown Al alloy tube; which is wrapped with Al alloy or a sheet metal piece.

On the other hand, the frame material of the outdoor LED screens depends upon the screen size and its bearing capability. Commonly, both angle iron and I seal is used in these screens. Moreover, when it comes to the outer frame decoration of both the indoor as well as the outdoor displays; Al or plastic boards are commonly used.

  • The Display Unit

Next is the display unit, which serves as the screen’s main body. This display unit is built with light-emitting materials along with driving circuits.

Now for the indoor screens, the display unit is the unit display panel that comes with various features. However, the outdoor screens have display units as the unit cabinet.

  • The Power Supply

The power supply is certainly an obvious part of any LED display screen that makes the screen work properly by supplying power. Its main working is to transform the alternating current of 220V into different kinds of direct current. This direct current serves in supporting different circuits of the display screen; making it work more effectively.

  • The Host Controller

This component of the LED display screen serves in pushing the input RGB digital video communication signals in the LED screen. As a result, these signals turn into grayscale and are then reorganized to create different kinds of control signals for the display screen.

  • The Scanning Control Board

This control board has to store the data on an LED screen. After this, the control board uses this data to generate different scanning signals as well as the control signals of the duty cycle grayscale.

  • The Transmitting Cables

These transmitting cables are used to transmit the display data as well as all the controlling signals that are generated by the host controller. Here, twisted-pair cables are used to transmit data and signals to the screen.

  • Video Card and Multimedia Card

Next comes the addition of special video cards and multimedia cards on an LED screen. This video card in a full color LED screen can serve in managing the basic computer video card functions, while also outputting the RGB digital signals. Moreover, it also handles the row, field, and blanking signals for the host controller.

Moreover, in terms of the multimedia card in an LED display, this one can also work forth changing the input stimulated video signals and turn it into RGB signals for the LED screen.

  • Addition for External Devices

Lastly, the advanced LED display parts also include sources to attach/link additional external devices to the display screen. This may include sources to attach the computer, TV, DVD, VCD, recorder, and even video cameras.


Most of the advanced and more updated LED screens may include some extra components that take it’s working to the next level. But when it comes to the compulsory LED display parts, you can directly consider seeking solutions from LED display manufacturers, in many customer review, DOIT VISION is a reliable led display supplier.

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