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What is the impact of the LED display brightness is too high? And how to control the brightness of the LED display?

May 11, 2021< Back to list

As we all know, the brightness requirements of indoor and outdoor LED displays are different, and the maximum brightness that lights of different qualities' lamps are also different. The higher the brightness of the display media makes it easier for us to see the display content. For the LED display, it is not that the higher the brightness, the better, there should be a limit. Generally, the brightness range of the indoor LED display is recommended to be around 800-1200cd/m2, and it is best not to exceed this range. The brightness range of the outdoor LED display is about 5000-6000cd/m2, which should not be too bright, and in some places to reduce the harm of light pollution, so the brightness of outdoor LED displays has been restricted. 

What are the negative effects of the high brightness of the LED display? Let's briefly explain this problem. 

1. Affect the lifespan of the LED screen 

Because the brightness of the LED display is related to the LED diode, and the LED screen has already set the physical brightness and resistance of the diode before leaving the factory, the higher the brightness, the greater the current of the LED diode, and the LED lamp will work under such overload conditions. If this goes on, it will speed up the life and light attenuation of the LED lamp. 

2. Increase the power consumption of the LED display 

The higher the brightness of the LED display, the higher the module current, which will cause the power of the entire screen to increase, and the more power it consumes. 

3. Harm people's eyeballs 

The brightness of sunlight during the day is 2000cd. Generally, the brightness range of outdoor LED screens is less than 5000cd. If it exceeds 5000cd, it is called light pollution, which will cause greater damage to human eyes. Especially at night, the brightness of the surrounding environment is very low. If the brightness of the LED display is too large, it will stimulate people's eyeballs and make people's eyes unable to open. Just like at night, when the environment around you is very dark, suddenly someone shines your eyes with a flashlight, then your eyes will not open. Then, the LED display is equivalent to a flashlight. If someone is driving by, then It may cause a traffic accident.

high brightness

How to control the brightness of the LED display to reduce the negative impact of the screen brightness on the environment? 

From both the manufacturer and the user, corresponding measures can be taken to adjust and control the impact of high brightness. 

From the manufacturer's side: 

1. Standardize the blue output of LED displays 

Brightness is a parameter based on the perceived characteristics of human eyes. Human eyes have different perceptions of light at different wavelengths. Therefore, brightness alone cannot accurately reflect the intensity of light, and the amount of radiation as a measure of visible light safety energy can reflect light more accurately. The dose for the eye. Therefore, the irradiance measuring device is an effective basis for judging whether the blue light output intensity will cause damage to the eyes. Outdoor LED display manufacturers should reduce the blue light output component of the LED display when the screen is initially set to meet the display conditions.

Blue output

2. Standardize the output frequency of the LED display and express safety measures in the user manual 

LED display screen manufacturers should be strictly in accordance with the requirements of the specification design, display screen output frequency meets specification requirements, avoid the screen flashing bring discomfort to the viewer, and to indicate the use the matters needing attention in the user manual, shows the right way to adjust the LED display brightness and look into the LED display screen for a long time may cause harm to human eyes.

3. Take protective measures during the design and production of LED displays 

Design and production personnel will touch the LED display more frequently than users. It is necessary to test the LED overload operation status during the design and production process. Therefore, design and production personnel are more likely to be exposed to the strong LED light, and they should pay more attention to and take special protective measures for the design and production of LED screens. In the process of outdoor high-brightness LED display production and testing, the relevant staff should wear black sunglasses with brightness attenuation 4-8 times before they can watch the details of the LED display at close range. In the process of indoor LED display production and testing, relevant staff must wear black sunglasses with brightness attenuation by 2-4 times. Especially the staff who test the LED display in the dark environment should pay more attention to safety protection, and they must wear black sunglasses before they can look directly. 

From the user side: 

1. Adjust the brightness of the LED display according to the environment

The main purpose of brightness adjustment is to adjust the brightness of the LED display according to the intensity of the ambient light. When using the screen, the user should adjust the brightness of the entire LED display according to the local sunshine and the actual brightness of the environment, so that the screen looks clear and bright without glare. The ratio of the brightness in the brightest sunny day to the brightness in the darkest period can reach 30,000 to 1, and the corresponding brightness settings vary greatly. However, there is currently no configuration for brightness specification, so users should adjust the brightness of the LED display in a timely manner according to changes in the environment. 

2. Standardize the light distribution and direction of the LED display

When installing and selecting the location of the LED screen, it is necessary to try to consider the rationality of the light distribution of the LED display and the uniform distribution of the light energy output by the LED display in all directions within the range of visual Angle, so as to avoid the strong light of the LED with a small Angle of view from the human eye.  At the same time, the direction and range of LED light exposure should be limited to reduce the pollution of the LED display to the surrounding environment. When the dazzling LED display screen is encountered in the dark environment, do not look directly at the LED electronic display screen for a long time or carefully identify the details of the picture on the LED electronic display screen, try to avoid the formation of bright spots in the fundus of the LED after the eye focus, and burn the retina.

If the user is still not sure about the brightness of the LED display, you can seek the advice of the LED display manufacturer, and adjust the maximum brightness without negatively affecting the LED display. 

Outdoor LED screen

As a manufacturer with many years of experience in LED display production, PREMTECO would choose the suitable type of LED lamps that meets the appropriate brightness according to the needs of different projects, which ensures that the screen is suitable for the actual situation of the project, and we can also provide automatic adjustment of the brightness of the screen to help you solve the problem of LED display brightness adjustment easily.


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