This is the type used in budget computer monitors, cheaper laptops, and very low-cost phones, and it offers poor angled viewing. Perhaps the most basic is twisted nematic (TN). And there are lots of different kinds of LCD panel. Viewing angles are generally worse in LCDs, but this varies hugely depending on the display technology used. For phones, viewing angles are extra important because you don’t tend to hold your hand perfectly parallel to your face. You can walk around an OLED TV or spread out in different spots in your living room, and you won’t lose out on contrast. OLED panels enjoy excellent viewing angles, primarily because the technology is so thin, and the pixels are so close to the surface. In general, OLED screens are best suited for use in darker rooms, and this is certainly the case where TVs are concerned. That means an infinite contrast ratio, although how great it looks will depend on how bright the screen can go. When an OLED screen goes black, its pixels produce no light whatsoever. A decent LCD screen might have a contrast ratio of 1,000:1, which means the whites are a thousand times brighter than the blacks.Ĭontrast on an OLED display is far higher. This tells you how much brighter a display’s whites are compared to its blacks. You’ll often see a contrast ratio quoted in a product’s specification, particularly when it comes to TVs and monitors. Take an LCD screen into a darkened room and you may notice that parts of a purely black image aren’t black, because you can still see the backlighting (or edge lighting) showing through.īeing able to see unwanted backlighting affects a display’s contrast, which is the difference between its brightest highlights and its darkest shadows. The higher the level of brightness, the greater the visual impact. This applies more to TVs, but phones boast credible video performance, and so it matters in that market too. Brightness is important when viewing content in ambient light or sunlight, but also for high dynamic range video. That’s a big deal in the TV world, but even more so for smartphones, which are often used outdoors and in bright sunlight.īrightness is generally measured as ‘nits’ – roughly the light of a candle per square metre. LED LCD screens can go brighter than OLED. The light from these LEDs is fired through a matrix that feeds it through the red, green and blue pixels and into our eyes. ![]() ![]() In cheaper TVs and LCD-screen phones, LED LCD displays tend to use ‘edge lighting’, where LEDs sit to the side of the display, not behind it. This sort of dexterity isn’t possible with an LED LCD – but there are drawbacks to this approach, which we’ll come to later. The light of an OLED display can be controlled on a pixel-by-pixel basis. ![]() You might hear OLED’s pixels called ‘self-emissive’, while LCD tech is ‘transmissive’. In a nutshell, LED LCD screens use a backlight to illuminate their pixels, while OLED’s pixels produce their own light.
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