If the LED display has poor heat dissipation, there will be many problems, just like dominoes, one falls, followed by a series of troubles. Let’s talk in detail about the chain reactions caused by insufficient heat dissipation.

1). The performance of LED chips is greatly reduced

1.1). Luminosité becomes dim:

LED chips are very sensitive to temperature. Think about it: the chip works well at normal temperature, and the brightness is sufficient.

But if the heat dissipation is not good and the temperature rises, the brightness will become lower and lower.

Par exemple, un écran d'affichage LED extérieur will become gray and dim when the sun shines in the summer, and the heat dissipation cannot keep up.

The original bright picture becomes dim, and the content displayed cannot be seen clearly from a distance.

Data shows that for every 10°C increase in temperature, the luminous efficiency of the LED chip may decrease by 5%-10%. Once the brightness decreases, the effect of the entire display screen will be greatly reduced.

1.2). Color becomes messy:

The high temperature will also make the color of the LED chip deviate. It’s like painting. The color was adjusted well, but when the temperature rose, the pigment changed color.

Red may become orange, blue may become purple, and the color of the entire display screen will be messed up.

In some occasions where color requirements are particularly high, such as LED displays used in organiser performances and art des expositions, if the color is not accurate, the effect will be completely ruined.

1.3). Lifespan is greatly shortened:

LED chips are like people. Their “bodies” will age faster in high-temperature environments. The higher the temperature, the faster the components inside the chip age and the shorter the lifespan.

An LED chip that can be used for 50,000 hours may break down after 20,000 hours if it works at high temperatures for a long time.

This is like a car that can run 200,000 kilometers, but if it often runs in bad road conditions and high temperatures, it may be scrapped after 100,000 kilometers.

2). The drive circuit is in a bad mood

2.1). Components break down at any time:

The resistors and capacitors in the drive circuit are like “little bombs” at high temperatures, and they may break down at any time. For example, electrolytic capacitors are particularly sensitive to temperature.

High temperatures will cause the electrolytes inside them to evaporate, reduce their capacity, and finally fail directly.

Once these components are broken, the drive circuit will not work properly, and the display will have various problems, such as flickering, screen distortion, etc.

2.2). Signal transmission is messed up:

The high temperature will also affect the stability of the drive circuit, making the signal transmission messy.

The image signal that should have been accurately transmitted may be distorted and delayed at high temperatures. Just like when we make a phone call, if the signal is not good, the sound will be intermittent and unclear.

If there is a problem with the signal transmission of the LED display, the picture will be stuck and deformed, seriously affecting the viewing experience.

2.3). Short circuit risk increases greatly:

High temperatures may also melt the solder joints on the circuit board, which is like the foundation of a house, which is loose, and it is easy to have problems. Once the solder joints melt, it may cause a short circuit in the circuit.

At the least, the display cannot work properly, and at the worst, it may cause safety accidents such as fire. Imagine if a large outdoor LED display caught fire due to a short circuit; the consequences would be disastrous.

3). Reduced efficiency of the power module

3.1). Energy consumption is rising:

The power module is like a “lazy man” at high temperatures, and its working efficiency becomes particularly low.

It can efficiently convert the input power into the power required by the display, but when the temperature is high, it consumes more power to maintain the output power.

For example, a power module is 90% efficient at room temperature, but it may only be 85% at high temperatures.

In this way, the energy consumption of the display will increase greatly, which will not only waste electricity but also increase operating costs.

3.2). Frequent triggering of overheating protection:

The power module generally has an overheating protection function. When the temperature is too high, it will automatically shut down to prevent damage.

But if the heat dissipation is not good and the temperature cannot be lowered, the overheating protection will be frequently triggered.

This is like a person who is too tired to work and needs to take a break at any time. If the power module is frequently shut down, the display will frequently restart or fail to start, seriously affecting normal use.

4). The overall performance of the display screen deteriorates

4.1). Uniformity becomes a mess:

Poor heat dissipation will cause different temperatures in different areas of the display screen, which is like a piece of cloth; some places are darker, and some places are lighter.

The temperature of the LED chips in different areas is different, and the luminous effect will be different, resulting in uneven brightness and color differences.

In some occasions where high display effects are required, such as advertising screens in centres commerciaux and scoreboards in stades, poor uniformity will make the entire display screen look particularly ugly.

4.2). Reduced contrast:

The high temperature will also affect the contrast of the LED. Contrast is like the layering of the picture. The higher the contrast, the clearer and more three-dimensional the picture.

However, insufficient heat dissipation will reduce the contrast, and the picture will become blurred and dull, like an ink painting without layers.

Looking at such a display screen will make your eyes tired, and it will be difficult to see the details in the picture.

4.3). Longer response time:

The response time of the LED chip will be longer at high temperatures. The response time is like the reaction speed of a person. The shorter the response time, the smoother the picture.

However, poor heat dissipation will make the response time longer, resulting in ghosting and afterimages in dynamic pictures.

For example, when watching a football game, the players’ movements are very fast, but because the display screen has a long response time, there will be a smear on the screen, just like the players are running in slow motion, which seriously affects the viewing experience.

5). Increased safety hazards

5.1). Increased fire risk:

High temperature is an important factor in causing fire. Poor heat dissipation will cause the insulation material inside the display screen to age.

Once the insulation material fails, a short circuit may occur, generating electric sparks and causing a fire. Especially in some crowded places, such as shopping malls and theaters, once a fire occurs, the consequences are disastrous.

5.2). Increased risk of electric shock:

High temperatures may also melt the outer skin of the wire and expose the metal wire inside. Once the metal wire is exposed, people may get an electric shock if they accidentally touch it.

Electric shock will not only cause harm to people but may also cause other safety accidents.

5.3). Serious electromagnetic interference:

The performance of electronic components is unstable at high temperatures, which may cause electromagnetic interference. Electromagnetic interference is like an invisible “noise” that affects the normal operation of surrounding equipment.

For example, in an office, if the LED display screen has poor heat dissipation and generates electromagnetic interference, it may cause the computer next to it to crash and the printer to fail to work properly.