WEBVTT

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What's the real difference between these different types of TVs and monitors you

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see on sale all the time? You know, LCD, OLED, QLED? You might know some of the

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basics, but there's actually a lot more than meets the eye. In fact, some of the

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most important differences are in the smallest elements that make up the

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picture, the little red, blue, and green sub pixels. And knowing about how these

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sub pixels differ between display types can help you make a smarter buying

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decision. To start, you need to know why most displays use those three specific

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colors: red, green, and blue. They're the primary colors of light. And by

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combining them, you can make just about any color you'd like. But exactly how

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pure those colors are, that makes a big

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difference in how rich and accurate the picture will end up looking. In fact,

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one big advantage current displays have over those old style CRTs is that CRTs

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usually had a hard time accurately hitting up the RGB phosphor dots that

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coated the inside of the screen's glass. These dots created colored lights when

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the display shot a beam of electrons at them, making them a forerunner of what

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we now think of as sub pixels. By contrast, modern sub pixels are placed

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in fixed positions in different patterns that can help with perceived visual

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quality or the display's lifespan. And these fixed positions also make them

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more color accurate than CRTs. But standard LCDs still struggle with color

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purity, at least to some extent. This is because they work by shining a white LED

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backlight through a color filter that makes the sub pixels red, green, or

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blue. But that white backlight is what's

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often called broad spectrum, meaning it's composed of many colors other than

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those three primaries. This, plus the imperfect color filtering, means that

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LCDs aren't exactly perfect at reproducing colors accurately. And even

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many more expensive OLED displays, even with their deeper blacks and superior

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contrast, have a similar issue since they rely on individual white OLEDs with

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color filters on top of them. Although it's possible to have pure red, green,

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and blue OLED sub pixels, the problem is that the blue sub pixels have

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historically tended to degrade faster because blue has a shorter wavelength

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and thus higher energy required than red or green. However, you do commonly see

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actual RGB OLED displays on phones,

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which we tend to replace before we notice the blue sub pixels degrading.

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That being said, we aren't saying you'll have a bad experience with these display

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types, especially as material improvements over the years have led to

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better color quality, but if you want a display with very color accurate sub

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pixels, something with quantum dots might be your answer. We'll tell you why

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right after we thank Delete Me. Online privacy isn't just personal, it's a

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management means peace of mind for all. So check out Delete Me, the link in the

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description, and safeguard your family's digital world today. A quantum dot works

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by emitting a pure single color light

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when another light source hits it. But there are two main types of quantum dot

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displays on the market right now. The first is the standard QLED which

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typically works with a backlight of pure blue LEDs along with red and green

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quantum dots. These three colors combine to make white which then goes through a

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color filter. But this white is composed of purer red, green, and blue than you'd

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get on a conventional LCD, resulting in deeper, more saturated colors. The other

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pricier kind of quantum dot display is the QD OLED, which, as you can likely

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guess, combines the superior contrast and black levels of an OLED with the

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color reproduction of a QLED. These displays also use a blue emitter layer

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along with red and green quantum dots which take the place of a conventional

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color filter, meaning higher brightness and richer colors than a conventional

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OLED. And you also don't have to worry about the blue wearing down faster

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because the whole emitter layer is blue. They also have more accurate colors on

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fastm moving objects than LCDbased displays because quantum dots have very

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fast response times. Something to consider if you watch sports or play

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lots of video games. That's a lot of different ways to combine red, green, and blue, but hopefully this will help

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you decipher that alphabet soup of different TV types a little better on

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your next trip to Best Buy. But if you'd like to know why some displays ship with

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sub pixels that are straight up dead right out of the box, watch this video