LED Screen Cabinet: All the Things You Need to Know

LED screen cabinet is the modular unit of the LED display screen. The area of a led display is generally large. And the LED cabinet is a unit that composes the complete screen.

In other words, you can think of the led cabinet itself as a small-sized LED display. So, as long as you understand the LED cabinet, you will be familiar with the LED display.

This article will take the various components of the LED cabinet as an entry point to introduce the use and function of the LED screen cabinet. If you are interested in this, let’s read together!

1. What is a LED Screen Cabinet?

Like a human is made up of various organs, LED display screens also consist of many parts. LED screen cabinet is an independent module that constitutes a large-area LED display screen.

To facilitate transportation and installation, dividing it into smaller units is the most realistic and feasible solution. When the workers spliced these led cabinets together, you can see a complete led display screen.

As an independent LED display unit, the LED screen cabinets consist of many parts. These components perform their duties, but they cannot work alone. Next, let us take a look at the elements of the LED screen cabinet.

LED screen cabinet-back
LED screen cabinet-back

2. A Complete LED Screen Cabinet

Generally speaking, a complete LED cabinet is mainly composed of seven parts. Among them, the LED module is the most crucial part. It is an essential factor for the LED display to emit light.

(1). LED display module

The LED display module is one of the main components that make up the finished LED display. It mainly consists of led lights, PCB circuit boards, connectors, kits, driver ICs and other parts.

1) LED Light

Types of LED modules usually include DIP and SMD LED modules, in addition to GOB and Mini LED modules.

The pixel pitch is between 3mm and 25mm. The smaller the pixel pitch, the higher the resolution per square meter, and the clearer the picture.

DIP LED module

The direct plug-in LED module is to make three light-emitting tubes together into a pixel point module, which is directly installed on the PCB board and soldered.

The process is relatively simple, and the cost is low. The distinguishing feature of DIP LED is its stability and durability, and it is mainly working outdoors. Compared with SMD LED module, the DIP LED module has high brightness.

SMD LED module

SMD 3IN1 technology refers to the encapsulation and synthesis of three light-emitting points in one light-emitting tube.

This packaging technology has a high requirement for materials and processes in the production process. SMD is currently the packaging technology most inclined to use by LED display manufacturers on the market.

SMD LED module

The lamps used in SMD modules consist of many models. Usually, indoor displays use SMD1515, SMD1010, SMD2020, and outdoor displays use SMD1921, SMD1415, SMD2727, and SMD3535.

For example, the outdoor P10 SMD series uses SMD3535, and its brightness is generally 5500-7000nits.

However, SMD LEDs may have quality problems such as dead LEDs and display mosaics under bad weather conditions.

GOB LED module

GOB LED display module adopts surface glue pouring process. This special surface coating has super high protection ability. Waterproof, dustproof, anti-scratch.

Compared with traditional SMD, it has the characteristics of high protection, moisture-proof, waterproof, anti-collision, and anti-ultraviolet. It can be applied in harsher environments, avoiding dead lights and lights on a large scale.

COB LED module

COB is the abbreviation of Chip-on-board. It refers to the bare LED chip directly contacting with the substrate (such as silicon carbide or sapphire) to produce an LED array.

COB LED display increases the packaging density of the LED array, thereby increasing the lumen density.

At the same time, the use of cob technology has reduced the footprint and energy consumption of the LED, but the light output remains unchanged.

Mimi LED

Mini LED is also called a sub-millimeter light-emitting diode. It uses 100-200 micron LED crystals.

And it is an improved version of the traditional LED backlight. Mini LED technology is considered as a transitional technology between the SMD LED and Micro LED.

Using Mini LED can produce 0.5-1.2 mm pixel particle display screens, and the display effect is much better than traditional LED screens.

2) PCB of LED Module


PCB is the abbreviation of Printed Circuit Board. It is an electronic component and supports electronic components.

The function of the PCB is to realize the interconnection of the circuits between various elements of the LED module.

The PCB consists of an insulating bottom plate, connecting wires, and pads for mounting and soldering electronic components.

3) Kits, Connectors, Cables

The kits mainly include a waterproof rubber ring, a mask, etc. They are used to protect the LED lights. The kits used by UNIT LED come from the first-line brand-Shin Kong.

The connector includes a power connector and a data connector. Wires include module power cables and module data cables.

4) Driver IC

The LED display control system is a system that controls the correct display of a LED screen according to customer needs.

According to the access signal mode, it can be divided into the synchronous system and asynchronous system.

The LED display control card is the core component of the LED display.

In a word, its function is to convert external video input signals or onboard multimedia files into digital signals that are easy to identify on the LED screen.

UNIT LED products mainly use the control cards of the first-line brands of Novastar and Colorlight. Their control effect is good. Special-shaped LED displays use Mosier’s cards.

We will configure a suitable control card for your LED display screen according to your actual project situation and your requirements.

(2). LED Power Supply

The power supply is a device that converts other forms of energy into electrical energy and provides electrical energy to the LED display module.

UNIT LED mainly uses MEANWELL, G-ENERGY, CHUANGLIAN, and other brands of power supply devices.

Many people in the LED industry recognize MEANWELL as the most suitable LED power supply manufacturer. Its input voltage is generally 220V±10%/110V±10%.

(3). LED Display Cabinet

First of all, the cabinet we are referring to here means the frame of the LED screen. As a part of the finished LED display cabinet, its function is to contain all the components.

Secondly, according to the different materials used, it can be divided into the metal cabinet, die-casting aluminum cabinet, aluminum cabinet, magnesium cabinet, and new material cabinet.

Because of the heavyweight of metal cabinets, they are easy to see in indoor and outdoor screens with fixed installation. Die-cast aluminum cabinets and magnesium cabinets are lighter than metal.

So, they are popular in LED rental displays. New materials refer to plastic and resin composite materials. As a new technology, because the risks in its use are not yet known, few LED video wall cabinet manufacturers use new materials.

(4). LED Receiving Card

Receiving card & hub card are the control system of the LED screen. Usually, the sending card is in the PCI-E slot of the control PC, and the data is collected and transmitted to the LED screen. The receiving card is in each cabinet of the LED display. Its task is to receive data from the sending card and run the LED display.

(5). Connector

There are three main categories: power aviation plug, data aviation plug, and internal wiring of the box.

(6). Cooling Fans

The function of the fan is to cool down the heat. There are three main types of fans: oil retaining bearing fans, ball fans, and silent fans. Among them, the quiet fan has the advantages of low noise and a long lifespan.

(7). Cables

There are many types of various wires. For example, there are power cords, CAT-5e network cables, connecting cables between power supplies, receiving card power supply cables, etc.

3. Types of LED Screen Cabinet

According to different working environments, different types of cabinets have their characteristics.

(1). Fixed LED Screen Cabinet

Customized Size Outdoor Fixed LED Display

This style of cabinets has indoor and outdoor two types. Firstly, outdoor display cabinets need to deal with various weather conditions.

Therefore, a double back door design is generally adopted. The iron cabinet is wear-resistant and relatively bulky. The average weight of this cabinet is 40-50kg per square meter.

Secondly, the installation of fixed cabinets installed indoors does not have to consider the influence of the weather.

Therefore, its walls tend to be thinner and have more openings. Meanwhile, their prices are relatively low. So they are favored by shops and shops.

(2). LED Screen Cabinet Used for Renting

Rental LED display screen is easy to see in various activities or exhibition sites. The workplace determines its characteristics: lightweight, easy to transport, and fast to install and disassemble.

The size of this type of cabinet does not support customization, because they are extruded with a mold of a specific size. UNIT rental LED display has two sizes:500×500, 500×1000(mm). You can stitch them together.

4. Maintenance Method of LED Screen Cabinet

There are two maintenance methods for the LED display: front and rear maintenance. As the name implies, the front maintenance is the maintenance and overhaul from the front of the cabinet.

And the rear maintenance is the maintenance and overhaul from the back of the cabinet. These two maintenance methods can exist in a LED cabinet. It is called dual maintenance.

(1). Front maintenance

The magnetic element and the LED screen cabinet are fixed by magnetic adsorption. When disassembling, use the suction cup tool to remove the led module directly from the front of the box to realize the front maintenance of the screen.

With the rise of small-pitch LEDs, front-maintenance indoor LED display products have gradually dominated the market. This front maintenance method can make the screen structure lighter and thinner, blending with the surrounding environment, and highlighting the visual expression effect.

(2). Rear maintenance

Large-scale LED display screens used for building exterior walls adopt rear maintenance and must be designed with maintenance channels.

The purpose is to facilitate maintenance personnel to perform maintenance and repairs from the back of the screen. Installation and disassembly are cumbersome, time-consuming, and laborious.

The rear maintenance method is suitable for installation scenarios such as roof type and column installation, and the maintenance efficiency is high. Customers can choose maintenance methods according to actual needs.

P2.5mm LED screen cabinet front maintenance

5. LED Screen Cabinet Materials

Modular LED display cabinets can be spliced into any size and shape to meet the display needs of scenes of different sizes. Multiple boxes are spliced into a huge LED screen.

The cabinet LED screen structure protects internal components. At the same time, they are easy to disassemble and transport. Below we share with you several commonly used cabinets made of different materials.

(1). Iron LED Display Cabinet

As a widely used indoor/outdoor LED display cabinet, the iron box is very common in the market. Its advantages are cheap price, good sealing, and it is easy of changing in the outer box structure.

Disadvantages: The iron box is heavy and difficult to install and transport.

In addition, the iron box does not have enough strength and precision, and its corrosion resistance is weak. The box is prone to rust if used for a long time.

(2). Die-cast Aluminum Cabinet LED Screen

The die-cast aluminum box has high strength and precision and is light in weight, making it easy to transport and install. 

The die-cast aluminum LED display is molded in one go.

The flatness of the box is more guaranteed, and the tolerance range is effectively controlled. It can ensure the flatness of the screen and basically solve the problem of seams.

(3). Magnesium Alloy Cabinet

Magnesium alloy is an alloy based on magnesium and added with other elements.

Features: low density, high strength, good heat dissipation. Its impact load capacity is better than that of aluminum alloy.

The price of magnesium alloy cabinets is higher than other cabinets. Its high-cost performance and excellent heat dissipation performance give it an advantage in the LED display market.

Therefore, magnesium alloy LED cabinets are mostly used for rental display screens.

The same rental LED panel 500*500mm and 500*1000mm cabinets can be used together. This allows more dimensions to be achieved.

(4). Carbon Fiber LED Screen Cabinet

The carbon fiber LED cabinet is designed to be ultra-thin, light in weight, and high in strength, with a tensile strength of 1500kg, and a weight of only 9.4kg per square meter.

Fully modular design makes maintenance more convenient. The 45-degree right-angled edge can realize a 90-degree splicing installation of the screen body.

The thin and light box brings convenience to the construction of the screen. The carbon fiber rental box reduces the load-bearing load of the stage and meets the needs of changing stage shapes.

led carbon fiber cabinet

(5). Nanopolymer Material LED Cabinet

The nano-polymer material box is shock-proof and anti-fall. It is much lighter than conventional boxes, with a single box weighing only 4.5 kg or 5.1 kg.

Easy to load and unload, light to carry. Truss costs and shipping costs are relatively low.

6. Excellent LED Display Screen Manufacturer——UNIT LED

UNIT LED is your trusted LED display screen manufacturer from Shenzhen, Guangdong, China. Our advantages are high-quality products, competitive prices, and high-quality solutions.

UNIT LED provides the following types of LED display products: rental LED display, energy-saving LED screen, commercial LED display, fine pixel pitch display, soft flexible LED display, transparent LED display, LED poster display, outdoor LED module, indoor LED module.

We have always been committed to serving our customers, and do our best to provide customers with quality products and services. Our products are well-known for their unique creativity, leading industry trends, and competitive prices.

After ten years of precipitation, Shenzhen Unit LED Co., Ltd. has accumulated rich experience in R&D, with first-class automated production equipment, standard clean automated production plants, and anti-static system devices.

The company has established a systematic and professional LED display production process. It provides an effective guarantee for customers to improve stable quality and product cost-effectiveness.

The Bottom Line

This article introduces the LED screen cabinet from components, classification, maintenance methods, and manufacturer selection. If you are interested in a LED screen cabinet, you can contact us. Hoping this article can help you.

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