4K TV: understand the technologies used in screens

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QLED, OLED, LED, NanoCell… find out what are the differences in television panels and see the list of 12 smart TV models. Shopping Guide: TVs for Mother’s Day Veronica Medeiros/g1 Choosing a new TV to give as a gift on Mother’s Day (or any other date) means bumping into a bunch of acronyms when searching. All the buyer is looking for is a model with a big screen and great image quality, but they have to decipher terms like LED, QLED or OLED along the way. In addition, manufacturers give names to products that combine different technologies in search of the best image. There appear other terms such as Neo QLED and NanoCell. Other guides: MOTHER’S DAY: 50 gift ideas for up to R$ 150 HOME CINEMA: g1 tests 4 domestic projectors SMART TV 8K: see a list of large and expensive models ALL GUIDES The Shopping Guide helps to unravel a little of this ” alphabet soup” involving the purchase of a 4K smart TV. The technologies used in screens control brightness, contrast and improve image quality. The most adopted by the biggest manufacturers in 4K TVs are: LED, OLED, QLED, Mini LED, Micro LED/Neo QLED and NanoCell. Understand the following terms and know what their pros and cons are. At the end of the report, see a list of 12 models with 4K resolution and smart TV features with access to streaming services. The sizes are 50 and 55 inches, the most popular among the Brazilian consumer, according to the GFK consultancy. Also read what to look out for when buying a new TV. LED 📺 WHAT IS LED: Technology uses light-emitting diodes (called LEDs, in the acronym in English) distributed across the panel to produce bright lighting on the TV screen, with the help of a layer of rear light. It is the most common method used by manufacturers on TVs and computer monitors and for HD, Full HD and 4K resolutions. Because of this, LED televisions with 4K resolution are the models with the best cost/benefit ratio compared to those using other methods, such as OLED and QLED. Some LED TV manufacturers also use the terms DLED (Direct LED) or Edge LED – the difference between them is the type of backlight panel. This panel is more complete on DLED, which represents most LED models, or just around the edges on Edge LED, which tends to appear on cheaper models. ⬆️ PROS: Most common and cheapest models in different screen resolutions. ⬇️ CONS: Less points of light, less color contrast control, thicker screens. 💰 HOW MUCH IT COST: 50″ and 55″ LED TVs were sold between BRL 2,000 and BRL 4,000 in the main online stores at the end of April. OLED 📺 WHAT IS OLED: It is the acronym for organic light-emitting diodes, which produce sharper images, with greater accuracy in color reproduction and with greater contrast compared to LEDs. The technology also allows each point on the screen to be controlled individually. Thus, in a dark scene with a person in the center, only the necessary points light up, leaving the others off, for example. Because they can emit their own light, OLED TVs don’t require an extra layer of backlight like LED panels do. This leads to models with thinner thicknesses – but which are much more expensive compared to LEDs and other technologies. It is only available on TVs with 4K and 8K resolutions. ⬆️ PROS: Every pixel is a point of light, best available contrast, great viewing angle. ⬇️ CONS: Less glare than competitors, TV lifespan may be shorter, price higher than other display technologies. 💰 HOW MUCH IT COST: 55″ OLED TVs were sold for over BRL 8,000 in internet stores in April. QLED 📺 WHAT IS QLED: Also called Quantum Dot or “quantum dots” by the manufacturers, it is formed by small pixels of material semiconductors that absorb light and emit specific colors. These dots are illuminated by LED backlighting, so colors are more saturated and brighter, something that makes a difference in brighter environments. Contrast on QLED screens is also improved. better, with dark colors demonstrated with greater depth and sharper image details. Also only available on 4K and 8K TVs. ⬆️ PROS: More points of light than LED TVs, more accurate colors, brighter than OLED. ⬇️ CONS : Contrast level and viewing angle smaller than OLED. 💰 HOW MUCH IT COST: 55″ QLED models were sold in the range of BRL 5,000 in the online stores consulted in April. Mini LED 📺 WHAT IS MINI LED: also an evolution of LED technology, with a reduction in the size of LEDs. Samsung says that each LED dot is replaced with 40 pixels of Mini LED, to cite one example. The result is a higher level of detail and more accurate color reproduction, according to the manufacturers. Smaller LEDs allow for greater control of light output. Each pixel generates more correct colors, since the lighting point does not “invade” the neighboring pixel and brings more contrast. You can also darken screen locations more precisely. Manufacturers like LG use the term QNED Mini LED to indicate some TVs with the technology. Others, like TCL, use it in conjunction with QLED technology in their models. ⬆️ PROS: More light points than traditional LED TVs, can be combined with QLED technology, high brightness level. ⬇️ CONS: the contrast is still not identical to that of OLED. 💰 HOW MUCH IT COST: TVs with Mini LED technology on the panel were sold between R$ 4,300 and R$ 5,500 in April in online stores. Micro LED/Neo QLED 📺 WHAT IS MICRO LED: Also an evolution of LED, it is a technology with points that emit their own light (red, green and blue) without backlighting or organic compounds on the panel, like OLED. The manufacturing technique is used only by Samsung on TVs in the Neo QLED line with 4K and 8K resolutions. ⬆️ PROS: Much more light points than traditional LED TVs, can be combined with QLED color technology, high brightness level. ⬇️ CONS: Adjustment of black and contrast levels are not as good as OLED, screens can be thicker compared to OLED. 💰 HOW MUCH IT COST: A 55″ TV with Neo QLED screen cost BRL 4,700 in internet stores in April. NanoCell/QNED 📺 WHAT IS NANOCELL: it is a color filter with nanoparticles used by LG in joint brand models with other technologies such as quantum dots and Mini LED, and which may appear under the name QNED. This filter reduces excess light waves, improving color quality. In practice, this generates more vivid and colorful images on screens with 4K resolutions and 8K. ⬆️ PROS: Better colors and viewing angle compared to LED TVs. ⬇️ CONS: Contrast is not as good, picture quality can be comparable to an LCD screen on cheaper models. 💰 HOW MUCH IT COST: A 55 model ” is in the range of BRL 5,000 in the stores consulted in April. See 4K TV options The Shopping Guide selected 12 models of 50″ and 55″ 4K TVs available in the main online stores in April. The prices consulted range from R$ 2,000 to R$ 8,000, depending on the model. AOC 50U6125-78G LG 55QNED7SSQA LG OLED55C2 EVO LG 55QNED80 Philco PTV55G52R2C Roku Philips 50PUG7406 Samsung Crystal BU8000 Samsung NeoQLED 55QN85B Samsung QLED 55Q65C TCL TK50P615B TCL 55C825 Toshiba 50C350L This report was produced with complete editorial independence by our team of journalists and specialized collaborators. If the reader chooses to purchase a product from the links provided, Globo may earn revenue through commercial partnerships. We clarify that Globo does not have any control or responsibility over the possible shopping experience, even from the links provided. Questions or complaints regarding the product purchased and/or the purchase, payment and delivery process should be directed directly to the responsible retailer.

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