It is understood that the complaints about the "light pollution" of outdoor LED advertising screens continue. The Shanghai Afforestation and Appearance Bureau announced at the end of August that it will soon draft a "Shanghai City Landscape Lighting Facilities Management Method" to improve the LED brightness "without evidence."
Too bright advertising screen will bring light pollution
The relevant person in charge of the Shanghai Municipal Greening and City Appearance Bureau told reporters that in 2004, Shanghai issued the "Shanghai City Environment (Decoration) Lighting Specification", but it only regulates the brightness of traditional outdoor advertising and signboards, and is not suitable for LED electronic displays. Screen. "Because there were not many LED advertising screens in Shanghai at that time, now 8 years later, this specification is obviously outdated." The person in charge said that LED brightness is a very flexible indicator. Without hurting the eyes, advertising Businessmen believe that the brightness should be greater to promote the advertising effect, while the public believes that the screen is too bright, it will hurt the eyes, affect travel or affect rest.
"This time, in cooperation with the Shanghai Lighting Society, we will formulate a brightness standard through on-site data collection and detailed analysis as much as possible, give the maximum brightness limit of the LED advertising screen, and will distinguish between day and night standards." This standard is only a minimum standard. If the LED of a building meets the standard, but the public still feels that the screen is too bright and affects their lives, they will still focus on people, conduct field investigations, and coordinate solutions.
Strobe, contrast and other values ​​will be gradually refined
An expert from the Shanghai Lighting Society introduced that the standard of the LED screen will focus on the brightness level. At present, people have reflected problems such as strobe and contrast, which have not yet been included. These indicators will be gradually refined in future research. . This "Management Measures" may be introduced in November.
The reporter learned that, in addition to stipulating the brightness of LED advertising screens, Shanghai will organize the preparation of urban landscape lighting facilities plans based on the urban construction layout, regional functions and cultural features, rationally lay out landscape lighting facilities, control the scale of development, and reduce landscape lighting to the public Light pollution caused by life.
"For some new LED screens, it is easier to adjust the brightness, and it can be operated by setting parameters in the background software, but there are some older models of LED screens that require complicated manual operations." Shanghai Semiconductor Lighting Engineering Technology Research Center Comprehensive Evaluation Li Shuzhi of the Ministry believes that with the standards, whether it is to adjust LED brightness for advertisers and shopping mall buildings, or to implement approval and law enforcement work by relevant government departments, there is an important reference value.
The formulation and implementation of this management method will make LED outdoor display screens more standardized. As long as scientific and rigorous experiments are carried out, the brightness standard of LED display screens will be able to provide a healthy environment for nearby residents while working.
Related Links
"Light pollution" easily damages the cornea and iris
How harmful is light pollution? The reporter interviewed Chen engineer of a photoelectric research institute in our city. "The brightness of sunlight is 2000CD (CD is the brightness parameter). If the brightness exceeds twice the brightness of sunlight, the human eye will be uncomfortable when looking directly, and the brightness of the LED display on the domestic market is generally set at 5000CD or even Higher. In some European and American countries, outdoor display brightness of more than 5000CD is defined as light pollution and will be prosecuted by the local government. "Engineer Chen said," light pollution "sometimes brings derivative hazards, such as glass curtain walls that reflect light more than sunlight The irradiation is more intense and dazzling, increasing the surrounding temperature by an average of 4 to 6 degrees Celsius, causing the heat island effect. Relevant research results also show that "light pollution" is easy to cause damage to the cornea and iris of the human eye, causing visual fatigue and visual loss. Seriously, it may even interfere with the central nervous system of the brain, making people feel dizzy, nausea and vomiting.
Car Power Inverter,Mini Car Power Inverters,Car Power Inverter 200W,Car Power Inverter 600W
GuangZhou HanFong New Energy Technology Co. , Ltd. , https://www.zjgzinverter.com