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LED display light pollution: 7 solutions

 - LED display light pollution: 7 solutions

LED display screen prices will fluctuate in 2022. As a result of the overall economic environment, the LED display screen industry will also experience a more challenging market situation. Meanwhile, competition within the industry will intensify. As a result of its high brightness and high refresh rate, LED electronic display screens have gained prominence in the field display screen category. However, the high brightness of LED electronic display screens often causes light pollution, which is often criticized by everyone. Sostron has developed some methods for setting safety brightness parameters and protecting LED electronic displays from light pollution.

LED display light pollution: 7 solutions

1.Adapt the LED screen brightness to the ambient light

A brightness adjustment adjusts the brightness of the entire LED screen according to the intensity of the ambient light so that the LED electronic display screen appears clear, bright, and not obtrusive. LED display screen manufacturers in China have realized this function, but few companies and users actually use it. In one respect, there is a lack of accurate and easy-to-use environmental brightness inspection equipment on the market, and in another, there is a lack of reference conditions for LED electronic displays.

When the human eye is used to 800 candela per square meter ambient brightness, 80-8000 candela per square meter is the scale of brightness that can be clearly seen. To see display content beyond this brightness range clearly, the human eye needs to adjust its ability and habits as much as possible. A display device that is easy to watch is roughly 500-50000 candelas per square meter bright in an outdoor environment with 5000 candelas per square meter. The human eye must adjust for a few seconds before gradually getting used to the 60 candela per square meter environment in order to clearly identify the mobile phone content. This is the reason.

As a result of this theory, we can establish a standard for LED electronic display brightness adjustment. As the ambient brightness changes, adjust the gray scale so that it is comfortable for human eyes to see. The maximum brightness of the electronic screen should be less than 10 times that of the ambient light, especially at night.

2.Distribution and direction of light on a standard LED display

To prevent the strong light of LEDs with small viewing angles from directly shining into the human eye, we should consider the rationality of LED light distribution and make the light energy output by LEDs evenly distributed in all directions within the scope of the visual point of view. The direction and scale of LED light irradiation should be limited to reduce the pollution caused by LED electronic display screens.

 - LED display light pollution: 7 solutions

3.Frequency standard for electronic screens

In order to prevent viewers from feeling uncomfortable due to flashes of the LED electronic display screen, manufacturers should plan the display screen in strict compliance with the requirements of the LED electronic display screen standard, and the output frequency of the display screen should meet those requirements.

4.The LED display screen operation manual should include explicit safety measures

User manuals for LED display screens should include precautions for use, explanations of how to adjust the brightness accurately, and information about the potential damage to human eyes caused by long-term direct viewing. The LED display screen should be closed when the brightness active conditioning equipment is defective.

When encountering eye-catching LED display screen in the dark environment, the self-protection method should be: Don’t look directly at the LED display screen for a long time or carefully identify the details of the image on the LED display screen, and try to prevent bright spots from forming on the fundus of the eye once the LED has gathered through both eyes and burned it.

 - LED display light pollution: 7 solutions

5.Measures to protect LED display screens during the planning and production process

The LED display screen will be touched more frequently by planning and production personnel than by users. The overload operation of LEDs must be tested during the planning and production process. In view of this, the planning and production personnel should pay more attention to and adopt special protection measures for LED display screen planning and production processes.

In order to be able to view the details of LED display screens at a close distance, relevant staff should wear black sunglasses with brightness attenuation of four to eight times during the production and test of LED outdoor high-brightness LED display screens. Black sunglasses with 2-4 times brightness attenuation must be worn during production and testing of indoor LED displays. The staff who test the LED display screen in the dark environment should pay special attention to safety precautions. Black sunglasses must be worn before looking directly at the LED display.

6.The blue output of a standard LED electronic display

    Because brightness is a parameter based on the perception characteristics of the human eye, only brightness cannot accurately reflect the intensity of light. For measuring the safety energy of visible light, the irradiation amount can provide a more accurate reflection of the dose to both eyes. For judging whether the output intensity of blue light will cause damage to both eyes, the measured value of irradiance measuring equipment should be used instead of brightness perception. Under satisfactory display conditions, LED display manufacturers and users should reduce the blue light output component of LED electronic screens.

     - LED display light pollution: 7 solutions

    7.Introducing advanced technology

    LED display screen brightness changes significantly over time and at different locations. In the event that the display’s brightness output exceeds 60% of the ambient brightness, it will cause discomfort to the human eye and light pollution. LED display screens should be equipped with an outdoor brightness acquisition system that collects the ambient brightness in real time and transmits it to the central control room. Based on the received data information, the central control room will calculate the most appropriate output brightness for the display screen, and adjust it accordingly.

    Multi-level gray correction technology should also be introduced into LED display screens to reduce the discomfort caused by the harsh color transition of 8-bit color screens. Using multi-level grayscale correction technology, the original display system can be upgraded to 14 bits for soft color transitions and reduced light stimulation for the human eye.

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