The TV display these days is powered by new technology and is very different from what it used to be ten years ago. The displays are better with more colors and more pixels. It is quite difficult to make out display technologies these days but if you try understanding some basic concepts, everything starts to get much clearer.
There are many details and differences, but at a very basic level, there are two competing ways of building a display. Once you understand the basics of OLED versus LCD, things begin to make a lot more sense.
All gadgets that have screens from phones to TV’s are either going to have a display based on OLED (Organic Light-Emitting Diode) technology or on LCD (Liquid Crystal Display) technology.
An extra backlight layer on LCD’s help to illuminate the pixels. The light source is usually an LED. LED’s are located on the edges of the display on cheaper displays, leading to brighter edges and a slightly dimmer center. Most LCD-based phones and pricier TVs are completely backlit. Light levels can be controlled better in such cases because the LEDs are across the entire back of the display, giving you better contrast.
OLED is slightly better than the LED. In an OLED screen, the pixels themselves illuminate when an electric current is passed through it. So, the OLED screen can be controlled pixel by pixel. Fewer lit pixels means that less energy consumed. This is a big advantage when it comes to mobile displays. High-end TVs have better control of light which means there is a more realistic rendition of scenes.
One drawback of LEDs is that manufactures are not able to make it cost-effective. That doesn’t matter so much in phones, but when it comes to monitors and larger screens, it makes a big difference. Another issue is that static images sometimes get burned into the display in OLED technologies. Smartphone screens generally manage to turn off after a few seconds, and TV screens show images that are constantly on the move, but for monitors this problem prevails.
On the other hand, LCD screens have a lower power draw when they show colors and are often sharper and easier to see outdoors. They do have small disadvantages, but from a manufacturing point of view LCD displays are cheaper to produce. Repair technicians will understand LED’s but are yet to figure out OLED’s. There is no doubt though that soon enough OLED’s will also not be a problem.