![]() Samsung and TCL each have multiple QLED series and the most expensive perform a lot better than the cheaper ones. QLED TV picture quality varies more than OLED All OLED TVs worldwide, including those in the US, use panels manufactured by LG Display.īased on my reviews, here are some general comparisons I've made between the two. That difference leads to all kinds of picture quality effects, some of which favor LCD (and QLED), but most of which benefit OLED.Īside from the US brands mentioned above, Panasonic, Philips, Grundig and others sell OLED TVs in Europe. The pixels themselves - tiny dots that compose the image - emit light, which is why it's called an "emissive" display technology. Instead, light is produced by millions of individual OLED subpixels. ![]() OLED is different because it doesn't use an LED backlight to produce light. OLED TVs don't need LED backlights so, in addition to image quality benefits, they can get amazingly thin. It's cheaper than OLED, especially in larger sizes, and numerous panel-makers can manufacture it. LCD is the dominant technology in flat-panel TVs and has been for a long time. Other TV makers also use quantum dots in LCD TVs, including Vizio and Hisense, but don't call those sets QLED TVs. In my experience however, improvements caused by better quantum dots are much less evident than those caused by other image quality factors (see below). Samsung says those quantum dots have evolved over time - that color and light output have improved, for example. Samsung has been using quantum dots to augment its LCD TVs since 2015 and debuted the QLED TV branding in 2017. ![]() The light from the LED source is transmitted through the layers to the screen's surface, which is why we say it's "transmissive."Ī look at the "sandwich" of layers in an LCD TV, where an LED backlight shines through a quantum dot layer (among others) and on to the LCD panel itself. That light then travels through a few other layers inside the TV, including a liquid crystal (LCD) layer, to create the picture. In QLED TVs, the dots are contained in a film, and the light that hits them is provided by an LED backlight. ![]() Quantum dots are microscopic molecules that, when hit by light, emit their own differently colored light. ![]()
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