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LCD真的能减少辐射吗?也许电磁辐射减少,但多了紫外线辐射

youngerbrother(http:fun.to/hongwei)

LCD backlights serve as the illumination source for LCDs. LCD backlights frequently employ fluorescent lamps. Fluorescent lamps consist of a phosphor coated glass cylinder with cathodes at each end. The cylinder is filled with argon gas and mercury. When the proper current is supplied to the cathodes, an arc is formed in the gas. The arc produces ultraviolet light (UV), which excites the phosphor on the glass. The excited phosphor produces visible light which is usually white. The color pixels in an LCD are produced by color filters at each subpixel.

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Last Updated: 2003-3-30
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工作学习 / IT杂谈 / LCD真的能减少辐射吗?也许电磁辐射减少,但多了紫外线辐射 -youngerbrother(http:fun.to/hongwei); 2003-3-30 {556} (#1114721@0)
LCD backlights serve as the illumination source for LCDs. LCD backlights frequently employ fluorescent lamps. Fluorescent lamps consist of a phosphor coated glass cylinder with cathodes at each end. The cylinder is filled with argon gas and mercury. When the proper current is supplied to the cathodes, an arc is formed in the gas. The arc produces ultraviolet light (UV), which excites the phosphor on the glass. The excited phosphor produces visible light which is usually white. The color pixels in an LCD are produced by color filters at each subpixel.

俺只知道，俺的猫猫只认CRT，对LCD视而不见，不知啥原理？ -lazycat(孤独的长跑猫); 2003-3-30 (#1114722@0)
如果我理解有误,请指正 -youngerbrother(http:fun.to/hongwei); 2003-3-30 (#1114724@0)
问题是和正常环境的比较 -tubie(tubie); 2003-4-3 {169} (#1119862@0)
LCD紫外线辐射的增加，不足正常环境（日光照射）的10分之1
CRT电磁辐射的增加，超过正常环境（广电，通讯辐射）10倍以上。当然，如果你生活在电视塔下面，或是正在打手机另当别论。

理论从何而来,有数据证明吗,有的话给LCD供应商们一份,他们正在找呢?他们可以所有压仓的低档LCD一售而空,据说还没有找到. 还有暴露在多强的电磁辐射和紫外线辐射下对人体有多严重的伤害,最好也来一个量化比较.否则比较容易误导(1/10和10倍好象很可怕,但是参照物不同) -bxu2(Bill); 2003-4-3 (#1120371@0)

具体数据我没有测量，不过一些常识是： -tubie(tubie); 2003-4-3 {669} (#1120476@0)
日光照射能量：600w/m^2, 15'LCD电源输入变压器功率36W（如果都用来发光大约500w/m^2）。实际耗电量约5w。至于真正的背光功率，建议显示纯白图案和3w日光灯作比较。

17'CRT显示器实际耗电量约20W，电子枪功率至少5W。由于是集束发射，至少相当于50W的发射天线（普通广播电台的发射能量，大型电视台能达到数百瓦）。假设屏幕把99%转换成光（应该也有紫外线吧，原理和日光灯比较相似，似乎紫外线比例不比LCD低，这我就不再提了）。人距离屏幕半米。这样算下来你收到的电磁辐射大约相当于距离电视塔15米。应该是比平时的电磁辐射量大些的啦，我只是保守的说10倍，而不是10^5倍。要知道收音机接收天线的灵敏度是用毫微瓦做单位的。

至于多大量对人有害，我没有研究，应该都是安全的。我想我只能和平时正常环境比较。

@Hamilton

LCD真的能减少辐射吗?也许电磁辐射减少,但多了紫外线辐射

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