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What is LED Backlight LCD Monitor

Yout
By Yout
in Displays
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Im looking to buy a monitor and i've seen LED monitors and LED monitors but what does this mean?

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Im looking to buy a monitor and i've seen LED monitors and LED monitors but what does this mean?

 

LED backlight means that the backlight uses LED light panels.  While LED displays are displays where each pixel is a LED.

 

LED displays that use LED diodes are usually found in large billboard displays.  Not consumer home TV or computer displays.  The home TV and computer displays are LED backlit.

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An LCD display is made of a liquid crystal sheet that displays the actual image, and some sort of backlight to make it bright and visible. In LED panels, that backlight is provided by LEDs in a particular arrangement. Other methods include, for example, "hcfl" backlighting.

 

The-Difference-Between-LCD-and-LED-TVs_2

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How they work:

http://www.link-sun.com/Images/Product/tft-intro_lcd-theory.gif

The LED panel is the part at the botom. It emits white light. The liquid crystal as in "LC" of "LCD"  is turned by eletriccal impusles to only let certain colours pass trough. Bam you have a rainbow image.

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It's pretty straightforward: the panel has a back light that is produced from LED lights. Every single monitor I have seen has this "feature", so its not something to worry about. I guess it's to distinguish from CRT monitors. You know, those giant, dinosaur monitors that run at 250 Hertz and weigh like 100 pounds? LCD/LED panels are the normal thin ones. Most every monitor these days is going to fit under the LCD/LED description.

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An LCD display is made of a liquid crystal sheet that displays the actual image, and some sort of backlight to make it bright and visible. In LED panels, that backlight is provided by LEDs in a particular arrangement. Other methods include, for example, "plasma" backlighting.

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 The-Difference-Between-LCD-and-LED-TVs_2

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It's pretty straightforward: the panel has a back light that is produced from LED lights. Every single monitor I have seen has this "feature", so its not something to worry about. I guess it's to distinguish from CRT monitors. You know, those giant, dinosaur monitors that run at 250 Hertz and weigh like 100 pounds? LCD/LED panels are the normal thin ones. Most every monitor these days is going to fit under the LCD/LED description.

 

There was a time when LCD panels did not use LED for back lighting, or used poor quality LEDs.

 

https://en.wikipedia.org/wiki/Backlight

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There was a time when LCD panels did not use LED for back lighting, or used poor quality LEDs.

https://en.wikipedia.org/wiki/Backlight

I figured my explanation would be poop compared to the other ones here. Good point though. I didn't really think of that.

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LCD display panels form an image, but do not generate light. You may have seen simple LCDs on devices like kitchen apppliances or digital watches which aren't lit up and can't be seen in the dark.

For an LCD monitor to light up, you need a light source behind the LCD panel. In modern LCDs, they use strips of LEDs, these are what are sold as "LED displays". Before that, LCDs used CCFL (fluorescent) lamps for light. At the time, there were no other kinds, so we just called those ones "LCD" and the term is still used today.

But make no mistake, "LED" displays are just a sub-type of LCD, not some new type of display. The new "Quantum Dot" displays are the same story, using LEDs enhanced with nanocrystals for a light source instead of regular LEDs.

Plasma is something else entirely and does not have a backlight, let's not get confused here.

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