LED advertising screen lack of standards set into traffic safety risks

"This electronic display is as bright as a searchlight, it's too harsh, and it's almost over my eyes when I drive. A driver drove through the downtown area of Shanghai, a commercial driver told the Legal Daily reporter.

In particular, when the screen flashing blue light, the rearview mirror is also a blue, nothing to see, it is not safe. For the LED advertising screen, a taxi driver in Shanghai is also very good opinion.

With the appearance of the city of Shanghai LED display sprung up, 23000 night was dressed up more and more beautiful. The light pollution, traffic safety and other issues are also increasing. However, the current outdoor advertising management approach, technical specifications for the provision of large LED display slightly behind the provisions. Therefore, the industry believes that it is necessary to make unified planning and management of the LED display, including the area of large screen size, and set up a regional range up to set the number of specified.

Brightness excessive too dazzle too bright

Every night, the lanterns, wall in downtown Shanghai on a high-grade commercial buildings began to play a huge color advertising, to attract the eyes of passers-by. Pudong, Lujiazui business district, a well-known building walls, a large number of thousands of square meters of LED display on the screen, with the frequent appearance of the jump lights, all kinds of patterns also appear from time to time.

With the development of LED technology, some construction developers in Shanghai began to build on the walls of the mosaic LED display, this trend is spreading. Industry insiders estimate that the existing 30 square meters above the display of Shanghai, the largest LED display of up to 6000 square meters, equivalent to the size of the 20 basketball courts, the investment amount of nearly ten million yuan.

Shanghai City Environmental Sanitation Bureau landscape management office director Guo Hua said, this large LED display is gradually popular in the business district building, not only for the relevant formalities of examination and approval of outdoor advertising, and probably imperceptibly pollution to the surrounding environment, the landscape surrounding the harmonious atmosphere or even seriously affected.

According to the chief architect of Shanghai city a famous architectural design company, LED display somewhere in Shanghai until 11 in the evening when the dancing lights, strong and light display screen make the surrounding office buildings of the staff and staff to work overtime does not work, but also to the surrounding residents after 11 at night to sleep.

Shanghai construction engineer Xie Xiaodong Wu Jianchun Academy of engineering, optical engineers building new technology division and the Institute was measured on the LED display in Shanghai downtown district shows: Xujiahui Pacific Digital Plaza upstairs Canon advertising display screen brightness is 556cd/ square meters (cd/ square meters per unit area refers to the luminance brightness); SHARP Shanghai six hundred commercial advertising display on 439cd/ square meters; ruckus hallmark tires advertising display brightness is 499cd/ square meters on the West Hotel; brightness Konica Minolta advertising display of CITIC Bank on higher, up to 755cd/ meters. In the Dapuqiao ASE, LED screen brightness on the square actually reached 2600cd/ square meters; Wuning road I grid square on the electronic display screen brightness up to 2250cd/ meters.

Wu Jianchun said that the measurement of the LED display area is more than 10 square meters. According to the urban environment in Shanghai city in 2004 the implementation of the "standards" (decoration) lighting, commercial advertising light boxes, signs of an area of more than 10 square meters, the maximum brightness should not exceed 400cd/ square meters. If this standard, the brightness of these screens are exceeded.

LED screen glare into light pollution

Shanghai resident Mr. Lu told the "Legal Daily" reporter, last year he was driving through the lotus road huminlu South Mall, with relatively large LED screen face, feel very dazzling. Whether it is color or bright white screen, are dazzling. Especially when the screen background appears bright white when the thorn keep my eyes open, it is easy to distract the driver, a great deal of security risks, and for some driving long drivers, which are more susceptible to interference and influence.

In fact, the human eye is very sensitive to the color light. Professor Yu Wei of the Department of physics of East China University of Science and Technology said that when the LED display with the same frequency to play different advertising, advertising may give people the feeling of dazzling, caused by tourists emotional and psychological discomfort, it should belong to light pollution. "Compared with the day, people's eyes in the evening to put a relatively large, so even if the intensity of light and the same day, but in the evening may make people feel uncomfortable".

Peer competition objectively let LED screen more and more bright, more and more. "A Shanghai City advertising insiders explained that the LED display is expensive, but now many stores do not need to install their own, but by the advertising expense, after advertising companies will regularly to the mall to pay. On the other hand, in order to attract attention, advertisers also require advertising when playing flash, bright, jump ", so the LED screen will adjust the more light, to cause light pollution.

Shanghai ophthalmic excimer laser the Tenth People's hospital director Yu Jing said, the high brightness LED screen may bring two damage to the human eye, one is when the human eye by high brightness glare stimulation, eye pupil, eyes will obviously feel uncomfortable, the other is the screen flashing light, the frequency is too high, will produce serious impact on human retinal macular, long-term damage and even lead to macular degeneration.

Shanghai semiconductor lighting engineering technology research center, said Li Shuzhi, a comprehensive assessment department, in fact, reduce the brightness of the LED screen