Bus station LED screen is too bright

33 new bus shelters were built, a more than and 40 ring seat bus station also finishing a new, installation of the LED display, not only satisfy the masses when the bus demand, also beautify the appearance of the city, streets become a scenery line.

However, when the bus platform LED screen sprung up, the resulting brightness is too high, frequent flashes, glare and other issues, some people criticized.

Excessive brightness too dazzling

Every night, the lights, along the Wuhan Avenue bus station on the LED screen advertising is particularly interesting with the lights, jumping, various patterns from time to time. "The screen is too dazzling, shake my tears. Last night, 7 am, in the east side of the village of Xu Xu Xu east railway station waiting for Mr. Fang said that due to the dark glare of the sun, passengers waiting for the majority of people choose to head down or turn to the other side. "When the screen is facing the cab and suddenly turns white, the eyes are uncomfortable. For the bus station LED advertising screen, a bus driver is also very helpful.

Has many years of driving experience Shengyuan taxi driver master Li said, especially in the evening, he wanted to see if there is no taxi on the platform, advertising screen flashing eyes, can't help be attracted to the past.

Affecting health and endangering safety

"The human eye is very sensitive to high brightness color. Ceng Qingyan, vice president of the Wuhan Ireland Eye Hospital, director of corneal disease, said a short time color jump, easy to produce visual blind spots.

She said, LED screen with the surrounding environment when the dark color, yellow, red and other colors will make the eyes uncomfortable.

Not as large screen advertising LED District hundreds of square meters of the bus station, the electronic screen is closer to human being, causing more harm to the human eye.

The deputy director of the Wuhan General Hospita of Guangzhou Military Region Chen Xiao said, electronic screen flashing for drivers and pedestrians near distance, not the pupil contraction, will cause the loss of retinal photoreceptor cells, can induce or aggravate the disease of cataract. If you encounter a high brightness white light stimulation, and even transient blinding, causing traffic accidents.

Wuhan jinhuasheng science and technology limited company of City Center Engineer Mao Chaojun had a lot of outdoor LED display of field measurements, in order to get better display effect, LED display brightness to 4000cd/ square meters (Candela / m2, the brightness per unit area).

Mao Chaojun said, according to the "Wuhan city outdoor advertising signs set" technical specifications, outdoor advertising in the area between 0.5-2 square metres, the maximum brightness should not exceed 800cd/ square meters. If this standard, these screens are greatly exceeded.

Brightness is still blank

For the design of the bus station, Wuhan city bus management office responsible person has said recently, the bus station pavilion construction investment by the government, but by market operation, investment, construction, advertising company operation and maintenance. Currently, the bus stop advertising by nearly 10 companies.

"Customer requirements are too harsh. "Mao Chaojun said, in order to attract eyeballs, advertisers often require advertising when playing" flash, bright, jump ", LED screen will adjust the more bright.

At present, the international light pollution is generally divided into 3 categories, namely white pollution, artificial daylight and color light pollution. LED display installation settings, broadcast content by the relevant departments for approval and supervision, but there is no uniform standard brightness.

Wuhan Urban Management Bureau official also said that the current Wuhan LED display brightness standards, is indeed a blank. In 2005 the introduction of the "Wuhan outdoor advertising signs set technical specifications" only provides for the traditional outdoor advertising, signs of lighting brightness, does not apply to LED electronic display.

It is understood that due to the presence of large outdoor LED display disturbing phenomenon, Wuhan city since June last year, has temporarily stopped the construction of such displays, but there is no restriction on the bus platform LED screen.

An advertising industry, said the city needs embellishment, LED display, neon lights are a manifestation of urban modernization. The government can revise the special plan, the LED brightness is too bright, flicker frequency speed, color change, such as the color of the re requirements, and guide the healthy development of outdoor advertising.