OLED, why not just LED?

[Edward78]

Why do they need the organic layer for color, they have LEDs with colors. Plus why don't all monitors with LED have them go off for pure black? OLEDs do that?

[Veehxia]

LED in "classic" monitor stands as the type of backlight they use, the panel itself doesnt produce any light, the individual pixel can be black but you'll still have backlight coming thru because the single pixel isnt a single backlight zone too.

Try to look at videos of backlight replacements on LED TVs to better get an idea of what I'm saying.

OLED doesnt need a backlight bc it's the single pixel that produces his own light so when you turn it off you can have pure black, as there is no backlight that can bleed thru.

[Crunchy Dragon]

LED monitors that aren't OLED monitors are just LCDs that use an LED as the backlight because they're more energy efficient than the fluorescent backlights of the past. Because of this, there is still a backlight glow when a screen is displaying something black in a traditional LED monitor.

 

With OLED, each individual diode counts for 1 pixel in the display, and each diode is either on or off. This is why OLEDs have deeper blacks and more vibrant colors, because there is no backlight.

 

If you have an LED display and you display something black on the entire screen and turn off all the lights in your room, there will still be light coming from the monitor. An OLED display showing the same thing will produce no light, because the diodes that make up the pixels are physically turned off.

[mMontana]

LED is a dumb stunt from Marketing teams trying to "refresh" LCD monitors while led-illuminated.

[dilpickle]

What you are talking about is MicroLED. It exists and it is incredibly expensive.

[e22big]

On 9/1/2023 at 8:53 PM, Edward78 said:

Why do they need the organic layer for color, they have LEDs with colors. Plus why don't all monitors with LED have them go off for pure black? OLEDs do that?

They didn't really use organic layer for colours, actually, they don't use any layer at all (especially for WRGB OLED), that's the reason why they are so excel at response time, you are looking the light source of the panel directly, which eliminate time gap between the solid layer and the backlight movement which typical of LCD. 

 

OLED got its name because the LED which formed the individual subpixel themselves are made from organic materials - of which known to most of us as plastic (some form of synthetic polymer.) It's pretty much a plastic or polymer LED that are more common during the last decade.

 

There is a self-lid panel that doesn't use an organic LED, which is the Micro LED that has been anticipated for a long time as well. But they aren't available in number and those that do, were extremely expensive. But OLED atm is pretty much a term to distinguish it from that type of panel technology. 

 

[Stahlmann]

What you're asking for is basically Micro-LED.  Essentially it's similar to the organic OLED technology but it uses non-organic LEDs. The difficult part is making the actual LED's small enough to fit into high resolution panels and also making that process easy and cheap for mass production. The only Micro-LED displays that are available cost tens of thousands or hundreds of thousands of dollars. It's basically a "if you have to ask how much it costs, you can't afford it" quote.