LED electronic screens have developed rapidly and have now replaced traditional billboards. Shopping malls are getting bigger and more widely used. With the advantages of LED electronic screens with high brightness and high refresh rate, it has quickly become the category of outdoor advertising screens. The outstanding ones, but it is also the light pollution caused by the high brightness of the LED electronic electronic screen, which is often criticized by us. In order to avoid light pollution very well, we have specially compiled some methods for setting safety brightness parameters and safety protection methods for LED electronic display screens.
1. Adjust the brightness of the LED screen according to the ambient brightness
The primary purpose of brightness adjustment is to adjust the brightness of the entire LED screen according to the intensity of the ambient light, so that the LED electronic screen looks clear and bright without glare. Most of the domestic LED electronic screen manufacturers have completed this function, but there are not many companies and users who really use this skill. On the one hand, there is a lack of accurate and easy-to-use environmental brightness checking equipment in the market. On the other hand, The LED electronic screen lacks scheduling specifications for reference.
When the human eye is used to the ambient brightness of 800 candela per square meter, the brightness plan that can be seen clearly is 80-8000 candela per square meter. Any flashing content beyond this brightness plan requires the human eye to try hard to control talents and habits, and gradually see clearly. For example, in an outdoor brightness environment of 5000 candela per square meter, the brightness plan for easy-to-view display equipment is roughly 500-50000 candela per square meter. In this environment, if you want to clearly identify the content of a mobile phone of 60 candela per square meter, you need to This is the reason why the human eye tries hard to manage talents for a few seconds and gradually gets used to it.
According to this theory, it is possible to establish the specification of the brightness scheduling method of the LED electronic electronic screen. According to the environmental brightness, the gray scale plan falls within the plan suitable for human eyes to watch comfortably. Especially at night, the maximum brightness of the electronic screen should be less than 10 times the ambient brightness.
Second, standardize the light distribution and direction of the LED electronic screen
The reasonableness of the light distribution of the LED should be considered as much as possible, and the light energy output by the LED should be evenly distributed in all directions within the visual angle plan to avoid direct glare from the small viewing angle LED to the human eye. Same as above, the direction and plan of the LED light should be restricted to reduce the pollution of the LED electronic screen to the surrounding environment.
Three, standardize the output frequency of the electronic screen
LED electronic electronic screen manufacturers should strictly plan the flash screen according to the requirements of the LED electronic electronic screen specification, and the output frequency of the flash screen screen meets the requirements of the specification, so as to avoid the discomfort caused by the screen flashing to the viewer.
Four, clearly indicate the safety method in the LED electronic screen operation manual
The user manual of the LED electronic screen should indicate the use of caution, clarify the method of accurately scheduling the brightness of the LED electronic screen, and the hazards that may be caused to the human eye by looking directly at the LED electronic screen for a long time. When the brightness of the automatic scheduling equipment is shortcoming, the manual scheduling method should be adopted or the LED electronic screen should be turned off.
When encountering a dazzling LED electronic screen in a dark environment, the self-maintenance method should be not to look directly at the LED flashing screen for a long time or to carefully identify the details of the screen on the LED electronic screen, try to avoid the LED forming a bright under the eyes after the eyes are assembled Spots, burns the retina.
Five, LED electronic screen plan, production process protection methods
Planning and production personnel will touch LED electronic screens more frequently than users. It is necessary to check the LED overload operation during the planning and production process. Therefore, planners, production personnel and brief exposure to the strong LED light should pay more attention to and adopt special LED electronic screen plans and production process protection methods.
During the production and inspection of outdoor high-brightness LED electronic screens, the relevant staff should wear black sunglasses with a brightness reduction of 4-8 times before they can watch the details of the LED electronic screens up close. During the production and inspection of indoor LED electronic screens, the relevant staff must wear black sunglasses with brightness attenuated by 2-4 times.
Especially the staff who inspect the LED electronic screen in the dark environment should pay more attention to safety protection. It is necessary to wear black sunglasses before looking directly at the LED electronic screen.
Six, standardize the blue output of the LED electronic screen
Human eyes have different ability to perceive light of different wavelengths. Because brightness is a parameter based on the perception characteristics of human eyes, brightness alone cannot accurately reflect the intensity of light. Using the amount of radiation as the guideline for the safety energy measurement of visible light can more accurately reflect the dose of light to the eyes. The measured value of the irradiance measuring device should be used as a basis for judging whether the blue light output intensity is harmful to the eyes, not the brightness perception of the blue light by the eyes. LED electronic screen manufacturers and users should reduce the blue light output component of the LED electronic screen under the conditions of flashing.