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"News broadcast" tall on the LED screen behind hidden trouble

Published:2014-03-05 Sources: Views:687

      Famous American business magazine "Fast Company" reported that, according to designer Jim Fenhagen will be unveiled this spring, CCTV "news broadcast" new studio will use the latest LED technology, high resolution, only 2.9 mm pixels of high-resolution screen will be a highlight of the new studio, but before that, the highest resolution pixels is 4 mm, this also means that the new operational LED screen will be unprecedented clarity. In addition, CCTV new site will be put into the new news in the studio will be the one and a half open office, this means that the audience through the glass wall can see a newsroom can hold 75 people.

     The new CCTV "news broadcast" the studio is high-end grade, atmosphere, however, the electromagnetic radiation should be how much? Isn't produce harm to human body? Through the electromagnetic radiation detection?


Leds are now ubiquitous, radiation hazard is significant

     May have heard of the story of the invention of the microwave, a radar expert spencer when debugging microwave generator, found himself the chocolate in the pocket, then he made the test such as corn, egg, then finally invented the microwave oven, of course this is a more specific band microwave. But this shows microwave (electromagnetic radiation) how much energy is a kind of power!

     And we don't discuss the LED light source itself have the electromagnetic radiation (LED by the radiation of microwave is our eyes actually able to identify the electromagnetic waves between 380 nm - 760 nm, no other wavelengths of radiation), but it is well known that the LED is a solid-state semiconductor light source, is a kind of low voltage electronic products, 220 volts ac mains through step-down, rectifier can meet the demand of the LED driver, CCTV "news broadcast" hall so that large amount of using LED lighting lamps and lanterns to drive? Every driver produced by electromagnetic radiation may be a little, but within the limited space of the accumulation of electromagnetic radiation, the body's bearing capacity is not more than?

      Have foreign customers are reflected in a concert, every time when open the LED display, wireless mike will be disturbed, so they asked to do the LED display screen through EMC testing certification, this is a very troublesome thing, complicated technology, few of LED display for EMC certification. High density of LED display P2.5 (i.e., LED spacing is 2.5 mm, every square metre 160000 points), such a high density, the refresh rate, according to the formula E = hv (H is Planck's constant, V is the frequency of electromagnetic wave), that is to say the refresh rate, the higher the electromagnetic radiation energy, the greater the LED two pins as radiation antenna (think of every square metre 160000 small antenna is terrible), just the direct work long hours in one of the staff, if no shielding and reduce the radiation, how terrible it is. In this environment, if caused by speakers or intuitive feelings, such as interference, and the effect of distortion will be caused take seriously, has no effect if the sound effects of intuitive feelings, may completely ignore for people, also is the man who work in them without awareness of electromagnetic radiation damage.


     The past traditional lamps and lanterns because is to use power frequency 50 hz (western 60 hz) of 220 v or 110 v mains, so for the effect of radiation is negligible, and now the emergence of LED lighting products, especially the emergence of a large number of inferior LED drive, we whether there is a need to consider the LED products on the health effects of electromagnetic radiation.

      Low density, of course, the application of LED lighting, LED outdoor display screen is not necessary to consider so much, but in the LED application of high density space, electromagnetic radiation detection should be an integral part of.

       Although the influence of electromagnetic waves on the human body is still in the debate, but before there is no final conclusion, controllable electromagnetic radiation, the absolute is inevitable.


                                                                                                                                

Source: the Internet


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