Most people think that LCD monitors are low or zero in radiation. That is not true. The backlighting uses thousand voltsfor fluorescence and carries an electromagnetic field. Zero radiation LCD monitors use e.g. clear metallic grating in front of thedisplay viewing area. The main goal of this contribution is optical properties analyze of radiation protected and no protected LCDdisplays. The analyze evaluates the display viewing angle which is one of the most important indicators for graphic informationquality in the Human Computer Interface system.
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