LCD v/s LED v/s OLED

Similarity Between LCD and LED The LCD television is a flat-panel television which utilizes a Liquid Crystal Display technology. LED TV’s are actually very much like LCD TV’s. They also have a flat-screen which utilizes Liquid Crystal Display technology.

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.

Crystal Display Technology?(Cont..) 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. 

Difference Between LCD and LED 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).

Types of LED Backlightings 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.

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.

Difference Between LED and OLED LED stands for light-emitting diode. These are little solid-state devices that make light because of the movement of electrons through a semi-conductor. LEDs are relatively small compared to compact fluorescent and incandescent light bulbs, but they can get extremely bright. However, LEDs aren’t small enough to be used as the pixels of a television – they’re way too big for that. That’s why LEDs are only used as the backlight for LCD televisions.

Difference Between LED and OLED(Cont..) OLED stands for organic light-emitting diode. Very simply put, an OLED is made with organic compounds that light up when fed electricity. That may not seem like a huge difference when compared to LED, but OLEDs can be made to be extremely thin, small and remarkably flexible. On an OLED TV, each pixel lights itself up independently of the others.

Points to be noted about OLED OLEDs can be made much smaller than typical LEDs. This is achieved through different manufacturing techniques. Typical LEDs are too big and cannot achieve decent resolution in devices like smartphones, laptops, and even small TVs. That is the reason that mobile phones have been using OLED screens in some form or another since 2001. But OLED technology in Television has just been implemented. It’s implementation on big size screens is costlier.

Drawbacks of OLED The major disadvantage that OLED currently has is its relatively short life span. While LEDs and other display technologies have rated lifespans of anywhere between 25,000 to 40,000 hours before its brightness is reduced to half the original level, OLEDs typically reach that state in about 14,000 hours; translating to anywhere between 4-8 years’ typical use.

Final Comparison The production of OLEDs has been aimed mainly at one specific purpose, the creation of displays. In contrast, LEDs have a wide variety of lighting purposes. LEDs are used in indicator lights, backlighting for LCDs, and many more items. LEDs are even used to create extremely big displays like those used in ballparks and stadiums. 

Summary 1.OLED can be made much smaller than LED. 2.LED has a much longer lifespan than OLED. 3.LED has many more applications than OLED. 4.LED is used for very big displays while OLED is used for small ones. 5.LED is cheaper than OLED.

QUIZ TIME….. Next slides you will see simple questions asked about OLED and LED/LCD. You have to declare a winner LED/LCD v/s OLED

Who will win in terms of better brightness? A. LCD/LED B. OLED

Who will win in terms of viewing angle? A. LCD/LED B. OLED

Who will win in terms of size? A. LCD/LED B. OLED

Who will win in terms of lifespan? A. LCD/LED B. OLED

Who will win in terms of weight and power consumption. A. LCD/LED B Who will win in terms of weight and power consumption? A. LCD/LED B. OLED

$$$Last and most imp $$$ Who will win in terms of price. A. LCD/LED B $$$Last and most imp $$$ Who will win in terms of price? A. LCD/LED B. OLED

Thank You !

Answer to Question with explanation Brightness – Winner (by a smidge): LED/LCD When it comes to brightness, LED TVs have a slight advantage. LEDs are just really good at getting extremely bright. OLED TVs can get bright, too, but cranking OLED pixels to maximum brightness for extended periods not only reduces that pixel’s lifespan, but the pixel also takes a little while to return to total black. Viewing angles – Winner: OLED This is a tricky topic right now, because both of the OLED TV’s currently available for purchase in the US are curved. So, while OLED TV’s should offer perfect viewing angles due to the fact that OLEDs produce light rather than attempt to block it as LED/LCD TVs do, the curve introduces a couple of complications. Foremost, the side that is curved away from an off-axis viewer will be less visible than the side curved toward that viewer. Second, because of the curve, anti-glare coatings can tend to tint the image when viewed from extreme angles. With that said, OLED technology is still superior in this regard and a clear winner overall. Size – Winner (for now): LED/LCD One day, in the hopefully-not-too-distant future, we’ll all be dreaming of owning 80-inch OLED TV’s, but for now, that dream is limited to 55-inches. Meanwhile, Sharp produces a mammoth 90-inch LED/LCD TV that you can buy right now, albeit at roughly the same price as an OLED TV. Apparently, scaling OLED up to 55-inches was a hefty challenge. But now that 55-inch sets have been achieved, perhaps moving up in size from there won’t be as tough.

Answer to Question with explanation Lifespan – Winner (for now) LED/LCD OLED is unproven when it comes to lifespan, and there is some cause for concern here because the compound used to create the color blue in OLED televisions is known to have a shorter life span. As one color degrades, the rest will go out of whack. Samsung appears to be battling this issue by using a blue pixel that is twice the size of other colors and reducing the amount of voltage applied to it. LG uses white sub-pixels and lays a color filter over them to create the desired red, green and blue colors. These bandages may very well work, but only time and use in the public arena can tell how OLED will hold up on the long term. For that reason, we have to call LED/LCD the winner, as its lifespan has proven itself to be adequate. weight, power consumption – Winner: OLED, OLED, OLED OLED panels are extremely thin and they require no backlight. As such, OLED TV’s tend to be lighter than LED/LCD TVs and considerably thinner. They also require less power, making them more efficient Price – Winner: LED/LCD Currently, an OLED TV is going to cost you either $9,000 (Samsung) or $15,000 (LG). We would be shocked – shocked! – if LG’s price didn’t come down in the coming months. Either way, $9,000 is a lot to pay for a television. And even though you can spend a little more on a much larger TV, the vast majority of televisions in the 55 – 65-inch price point are half OLED TV’s asking price or less. If affordability is a major consideration, LED/LCD is your best bet, and it probably will be for a few years.