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LED and LED LCD are one and the same technology. Older LCD TVs used Cold Cathode Fluorescent lamps (CCFLs) to provide backlighting whereas LED Backlit LCD TVs use an array or smaller more-efficient light-emitting diodes (LEDs) to illuminate the screen. OLED stands for Organic Light Emitting Diode. Each pixel in an OLED display is made of a material that glows when it receives an electrical signal (an effect that is referred to as electroluminance). Each tiny OLED pixel in the screen creates its own light depending on how much electrical current you send it. OLEDs have infinite contrast ratios since OLEDs can produce perfect blacks. It is the only technology capable of perfect blacks and extremely bright whites on a per-pixel basis. LG does not manufacture QLEDs and for an explanation of what QLED is, we recommend you contact the manufacturers of QLEDs...^IFV
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