As the LED displays in Shanghai's business districts have sprung up, the nights in Shanghai are being dressed up more and more. Some readers have reported that some electronic displays are dazzling and even light pollution affects driving safety at night. A few days ago, the reporter and two engineers from the Shanghai Academy of Science and Technology took a brightness meter to measure 11 led displays in the urban area, and found that the brightest display brightness has exceeded 130 times the nearby light box billboards. The relevant person in charge of the Landscape Management Department of the Shanghai Municipal Greening and City Appearance Bureau said that the relevant regulations only stipulate the brightness of traditional outdoor advertising and signboard lighting, and it is not applicable to LED electronic display screens. However, relevant regulations will be introduced soon.
Doctor: Staring at the glare and hurting the eyes
"Especially at night, the big LED display will definitely blur the line of sight, especially when the screen is flashing blue light, the blue light in the rearview mirror is nothing, and there is no safety hazard." A taxi driver Very opinion.
Yu Jing, director of the Department of Ophthalmology Lasers at the Tenth People's Hospital, told reporters that LED screens with too high brightness may cause two kinds of injuries to the human eye. One is when the human eye is stimulated by high-brightness glare, the pupils of the eyes shrink. The eyes will obviously feel uncomfortable. The other is that the screen flashes and the frequency of the light is too high, which will affect the macula of the human eye, and long-term damage may even cause macular degeneration.
Advertiser: To attract attention
"Peer competition objectively makes LED screens brighter and more and more." An advertising industry insider explained that although LED displays are expensive, many commercial buildings and plazas do not need to pay for their own LED displays. Instead, the advertising company will bear the relevant expenses. After that, the advertising company will pay the fees to the commercial buildings and the plaza regularly. In this context, the commercial buildings and the squares certainly welcome the LED screens. On the other hand, in order to attract attention, the advertiser also requires the advertisement to "flash, light, jump" when playing, so the LED screen will be brighter and brighter until it causes light pollution.
LED advertising screen will be incorporated into the supervision
The relevant person in charge of the Landscape Department of the Shanghai Municipal Greening and Cityscape Bureau said in an interview that there is currently no brightness standard for LED displays in Shanghai. “The Shanghai Urban Environment (Decoration) Lighting Code promulgated in 2004 only stipulates the brightness of traditional outdoor advertising and signboard lighting, and does not apply to LED electronic display screens.†The person in charge said that this embarrassing situation will be break in. The reporter learned that the recent revision of the "Shanghai Urban Environment (Decoration) Lighting Code" is expected to be released, this revised draft will stipulate the brightness standard of LED display. At present, the revised draft has been tentatively drafted. According to reports, after the revised draft is issued, management measures will be taken on the display with excessive brightness. Before the introduction of the standard, the management department will coordinate the settings to reduce the brightness, reduce the strobe, and shorten the opening time for the display that does affect the normal life of the citizens.
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