According to the Daily Mail on June 30th, bright lights make it difficult to see the stars in the sky and disturb people's sleep patterns. Most people living in cities are aware of the effects of light pollution, but the latest research It shows that light pollution has other side effects, which is to make the spring come one week earlier. This is the thrilling conclusion that volunteers across the UK have helped scientists at the University of Exeter to record the germination of trees for thirteen years. The researchers also said that the light pollution generated by artificial lighting at night is increasing at a rate of 6% per year, which makes the Xiaobian as a LED person even more shocked.
As we all know, the LED industry is a "light-making" industry, LED display is one of the "manufacturers" of light, the city's light pollution, has a great relationship with LED. Although, in recent years, the government has introduced a number of related policies, such as June 17, 2013, the mandatory local standard of Shanghai, "Maximum visible brightness limit and measurement method for LED display in public places" was officially released; In November 2014, Guangzhou issued the “Regulations on the Management of Optical Radiation Environment in Guangzhou†(Draft); on November 5, 2015, the Shenzhen Municipal Urban Administration publicized the “Special Plan for Outdoor LED Display Setup in Shenzhenâ€. However, light pollution has caused disturbances and traffic safety to occur from time to time, and even repeated prohibitions. Nowadays, with the wide application of LED display screens, it is difficult for cities to find out where there is no LED display. Urban light pollution is everywhere. Therefore, it is extremely urgent to rectify light pollution. But how should the LED display be responsible for this? Xiao Bian believes that to solve the problem, it is necessary to ring the bell to control the light pollution, and it is necessary for the LED display manufacturer and the display operator to join hands.
Firstly, according to the distance of viewing, the surrounding environment and the viewing angle, the display area and position are reasonably planned, so that the installation of the LED display screen maintains a certain inclination and a certain height, which can effectively reduce the direct light and the scattered light of the LED display screen. Environmental impact. The LED display is installed at a height within 10m from the ground, which can also reduce the influence of the escape light and direct light on the surrounding environment;
Secondly, the brightness of the LED display screen is reduced by the brightness adjustment technology, and the design brightness is restored during the day; the automatic brightness adjustment system automatically converts the brightness of the environment suitable for the environment to avoid light pollution; when designing the video, it is necessary to use high-purity colors and use more. Mixed colors, use low-purity, high-brightness colors as the main color as much as possible; the transfer between the previous video and the next video should be slower; do not use too much flickering.
In addition to the above methods, it is also possible to reduce the problem of light pollution of the LED display by improving the packaged device. For example, the in-line device has an asymmetric optical design. We know that according to the view of most viewers, the upper viewing angle of the LED display is the invalid display range of the LED display. Therefore, the package manufacturer can perform the asymmetric optical design on the in-line device, and the upper viewing angle is Part of the energy is transferred to the visible range of the lower viewing angle to improve the effective brightness, thereby avoiding light pollution caused by invalid visual areas such as residential buildings and night sky.
For the surface mount manufacturer, because the human eye feels more about the color than the bright and dark feeling, the high brightness caused by the blind pursuit in the outdoor environment may cause light pollution, and may increase the contrast of the LED display to improve the image. Recognizability is a more feasible approach. At present, Osram, Guoxing Optoelectronics, Xinguangtai, Jingtai and other packaging companies have increased their efforts to promote SMD black light, reducing the problem of light pollution of outdoor LED displays from the device.
LED display screen is not guilty, but let the LED display become a light pollution emitter when updating information and screen output. LED display manufacturers and operators bear unshirkable responsibility, so how to make LED display harmoniously integrate In the city, the realization of the artistic integration of the city and the light will be the top priority for the development of the LED display industry in the next few years. I hope that the screen enterprises will advocate more energy conservation and environmental protection, and we will have a normal spring.
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