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Difference Between LCD and LED Televisions

lcd_amLCD vs LED Televisions

The LCD television is a flat-panel television which utilizes a Liquid Crystal Display technology. It has two layers of glass which are polarized and stuck together. The liquid crystals are held in one of the layers. These liquid crystals pass, or block the light, to produce images on the screen when the electric current passes through it.

However, the crystals do not produce their own light. The light comes from the series of fluorescent lamps at the back of the screen. There are millions of shutters arranged in a grid, which open and close to release and trap some of the light that is not needed to create images. Then each shutter is paired with a colored filter which produces a sub-pixel. These are so small, that when they combine, they create a single pixel, which appears to be a single spot of color on the screen. With the help of the fluorescent lamps, the images created by the liquid crystals become visible to the viewer.

LCD television produces high image quality. They can be made very thin, which makes them less space-consuming, and the user can hang them anywhere. This makes them appealing to buyers.

LED TV’s are actually very much like LCD TV’s. They also have a flat-screen which utilizes Liquid Crystal Display technology. The only difference is their source of light, which is at the back of the screen. The LCD TV uses fluorescent lamps, and the LED TV uses LED (Light Emitting Diodes).

There are two types of LED backlighting. One is referred to as Edge lighting, and the other is called Full-Array lighting. With the Edge lighting, the series of diodes are arranged along the outside edges of the screen. When there is power, the light is distributed across the screen. Alternatively, in Full-Array lighting, there are several rows of diodes behind the entire surface of the screen. They provide more control over brightness and dimming, because the diodes can be turned on and off independently.

LED TV’s are LCD TV’s with a new backlight system. They are newly developed for LCD’s, because Light Emitting Diodes are said to give more balance in color saturation, and use less power than the fluorescent lamps. LED TV’s are the newest version, and that’s why they are currently more expensive than the standard LCD TV’s.

Summary:

LED TV’s are still LCD TV’s. They are just considered to be the newer LCD TV version because of the new backlight system used. The LED TV uses Light Emitting Diodes, while the standard LCD TV uses fluorescent lamps. Although they both still use Liquid Crystal Display technology. The main difference is the part behind their screen, which is the backlight.


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187 Comments

  1. Appreciate the article, author has described the difference which a common person can understand well.

  2. LEDs and LCDs are entirely different. LEDs, as you said are Light Emitting Diodes. The light comes from the pixel elements themselves. LCDs, on the other hand, produce no light. The back light is the source of the light. The applied current simple causes the “windows” making up the three colors of each pixel to pass the light through or prevent it from passing through. A LED display needs no back light.

    • I understand your point of view. We have been fooled, so lets get you un-fooled. Example: A film projector bulb. One is fluorescent the other is an LED backlite, and the film is a pretend LCD layer…

      There is true “Light Emmiting Diode” screens like you say. Go to walgreens and see a sign up close. They use wired LED’s, one color or pyramid of green blue yellow with no back lite.

      I dont know if they could wire up millions of individual LED bulbs (3 color triangle or even one led with 3 color change) to make a TV screen resolution but NOW with new “QLED’s” at atomic level resolution, we will have a true LED with NO backlight and a new choice at the store.

  3. Wonderful article and superb clarification about LCD and LED thank you very much for you calrification.

    srinivas g babu

  4. nice article ,,,it helped me a me a lot ……these are additional information i like to give..

    LED FACTS

    State of the Art Picture Quality
    About 40% Less Energy usage than a same sized LCD TV
    Mercury Free and a VERY Thin Design
    Currently LED TV’s Cost about 20-30% more

    LCD FACTS

    Good Picture Quality, but Images may “burn” in Display
    Energy Costs run Between $150-200 per year to operate an LCD
    Mercury IS used in Manufacturing Process
    Cost is the Cheaper of the Two Choices

  5. article is so simple and clear…even a layman can understand the difference

  6. Concise and deep. I am now better educated to make my choice.

  7. Good site.useful in understanding .

  8. Nice article. Simple and very easy to understand. Very good explanation.

  9. It helps me a lotbut i m confused which brand i have to pick.

    • neeta dont be cofused,go 4 lg

      • Yes, check out Korean LG, who bought out our last “made in America” TV manufacturer, ZENITH. They merged just when Zenith’s engineers won US Gov’t approval for enacting HDTV standards in the states. It may say LG but many zenith quality ideas still inside set before name goes on. LG first TV manufacturer to buy into the very future with QLED invention, which is a True color LED, needing no backlite. Colors are produced by arching electric across gap on a quantum level. New type now to choose from in 2011 is OLED (organicLED). Best picture and color yet, but OLED’s last only 4 to 6 years & can’t replace burn-outs…P.S. INTERNET option is must have for new TV’s as using add-on X box, PlayStation, etc. limits choices like on HULU which licensed most programs for PC only, not thru game, or DVD player. And a TV w/internet is just like a PC. With a Cloud service, all apps/programs and saves are online using TV as a monitor that won’t go outdated so fast like a PC. Even new IE9 made for browsing on TV with buttons simplified. For me internet TV is an infinite selection compared to old cable tuner & appointment schedule viewing.

  10. This article is very simple word to understand. I know about difference between LCD TV & LED TV from this article.

  11. simply awesome

  12. smart explanation

  13. Simple but meaning full

  14. Awesome topic!! Thanks Billions!!!!!!!!!!!!!!

  15. sbton sada article. kuch pata nahin lagya

  16. thank you very much. helped me

  17. led tv is better than lcd……….

  18. Wow… thanx man. Now it’s clear as a crystal.

  19. really very fruitful article

  20. Very informative.
    Salesmen – here i come!

  21. Thanks a lot. Through this article, I’ve known that my purchasing of the 32″ LED TV was the right decision I’ve made. The fact that at first my choice was the LCD TV, Until I’ve had second thought and purchased the LED instead. Again, thank you for this informative article.

  22. Nice Article….Simple and Quick understanding of Diff b/w LED/LCD….

  23. Scott, you can make a TV with millions of LEDs with three different colors. In fact, that’s pretty much what is used on some very large outdoor TV displays. Many signs in Vegas are like that.

  24. Like this article a lot!!

    It is very informative yet not an info-overload especially for those who is not into the whole tech jargons like me. Its simple and easy to understand!

    Hope to find more useful articles here! πŸ™‚

  25. very informative and smart article

  26. thanks for the info. very informative article. now i know what’s the difference of LED and LCD tv’s and i can tell it to anyone who doesn’t know their difference πŸ™‚

  27. it’s very useful .

  28. it’s very useful n like this article alottttttttt

  29. Thank you so much.It was so informative and helpful.

  30. U R explain is marvalous.

  31. which one is more energy-efficient and ‘green’?

  32. The info. was much useful.

  33. THIS IS VERY HELPFULLLLLLLLLLLL.

  34. its very use full

  35. Thank you a bunch!

  36. Hi all,

    Thank you very much for the great clarification. But could any body suggest which brand LED is to purchase, Philips, LG,Samsung, Sony etc

    Srinivas

  37. i was just curious…
    thanks for the helpful and cool info!

  38. very nice article …. very good points have been covered ..

    Thank You

  39. very good article from which we get good information

  40. thanks for the info. very informative article. i was planning to replace my old 21″ CRT and was confused what to buy.now i know what’s the difference of LED and LCD and PLASMA tv’s and i can now make a better choice.

  41. Thanx a lot for the article i want to know which one is more energy efficient LCD or LED TV?

  42. Good article. informative

  43. Good Info. I’ve always wondered why LED TV’s are so high in Price. Guess i’m gonna buy a 42″ from the Holiday season pocket money.

  44. This is, by far, the most clear and understandable explanation of the difference between LCD and LED I have found. Thank you so much.

  45. Good article for those confused by marketing misinformation.

    One thing you could mention though is true LED displays like AMOLED or just OLED (orgranic LED) that are being developed. Each pixel is (or can be) an individual LED, thus producing its own light.
    Of course if you had a cheap OLED, single color (white) display behind a standard LCD display and therefore used it for backlighting, you could call it an “OLED” TV, but that’d be a bit decieving as well πŸ˜›

  46. I have a LCD and have had to replace the flouerscent lamp 3 times (very expensive). Does the LED tv’s have anything that has to be replaced like that?

  47. Thnx for the information
    Very helpful

  48. really helpful

  49. nice explation

  50. Thanx for the information. It is really helpful.

  51. We have samsung LED tv and sony LCD,when we compared the clarity of both the tv’s i found that LCD is more clear, both are on cable network, why?????????????

    • hhey dude ive also hv samsun smart tv ……. [ led 3d full hd ] … you know …led are 10x bettr thn lcd thats why they are more costly… and 1 thing led tvs are best in quality u hv to use a digital connection thn u see the real diffrence …. since lcd are of low capability they show better in cable connection …. 1 fact u already knw when u use crt tv in cable it shows the best no pixelisation so the series and generation matters ….. suppose apke paas ek cycle h aur ek luna … ap dono ko paddle se chala sakte hai par apko luna me dikkat to ayegi hi na…. agar ap use petrol se chalaenge to apko kitna achcha hoga vaise hi digital connectiona r a standard for ur led tv ….. bye …………………………

  52. This is a useful blog.. Thanks.

  53. Thanks a lot

  54. This information is very useful bcoz i have just purchased a LED Monitor and I was confused about why LED so expensive than LCD. This artical has given me right information with description. Thanks πŸ™‚

  55. Thanks a lot info…

  56. i want to know what changes occur on changing position watching LED and LCD TV

  57. Those Marketers have really confused people. The display you’re referring to is actually a LED backlit LCD Television. I see many LED backlit LCD Televisions marketed as LED displays or LED TV’s. They are not, this is a lie, really. It’s a manipulation to get people interested in old technology and confused as to what they are buying. That said, LED backlit TV’s are still better than fluorescent backlit TV’s as LEDs are more efficient and resilient light source than fluorescent tubes and don’t contain the mercury vapor, but they are not LED displays.
    True LED displays (Just because of Marketing, now we have to say ‘True’, how stupid) do not need a backlight because each pixel is a light source.

    http://en.wikipedia.org/wiki/LED_display
    http://en.wikipedia.org/wiki/LED-backlit_LCD_television

    LED’s are more efficient, cleaner and last longer than fluorescent tubes, they are the next generation in home lighting, BTW…

  58. REALY HELPFULL ARTICLE.I WOULD SAY LED IS BEST

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