What is a LED 3D TV?

Posted in Tips

Many people want to buy a 3D television but don’t know what is a LED 3D TV and what is the difference between models. The majority of modern 3D devices use a polarized 3D system or an active shutter 3D system to create the illusion of depth. Some use a multi-view display, streoscopic display and autostereoscopic display that is grasses-free. The latest technology such as Visible light communication and WindowWalls are being implemented because of the LED lights that have high frequency flickering images.

But what is a LED 3D TV actually? A LED-backlit LCD display is a screen that replaced the cold cathode fluorescent backlighting with LED backlighting. LED backlighting technology has the same advantages as the cold cathode fluorescent LCDs with greater color range, better contrast, reduced energy consumption and better brightness. The most common LED display used it the white-edge LEDs surrounding the screen, followed by the LED array behind the screen and the Dynamic “local dimming” that allows individual control of the brightness.

Those who in Gothenburg probably know what is a LED 3D TV, because of the 2011 UEFA Champions League Final match bewteen Barcelona and Manchester United displayed on an EKTA screen with a diagonal of 23 ft 3.92 in. The large screen entered the Guinness Book of Records.

A LED-backlit LCD display with local dimming LEDs has photorefractive effects, thus it can show truer black and whites at higher contrast. The backlight can be brightened or dimmed locally, although small, bright objects on a dark background can lose detail.

Unlike pure-LED systems, LED-backlit LCDs are not self-illuminating. They have a longer life than plasma TVs and don’t use any mercury. Instead they use arsenic and gallium to manufacture the emitters. Nanoco Group partnered with a large Japanese company in 2009 to work on quantum dots development for LED devices. Quantum dots render colors in the visible spectrum with more precision and emit light in normal distributions.

Autostereoscopic 3D displays are available on the market today. They use static parallax barrier or s lenticular lens with a limited number of viewpoints. An active parallax barrier can be used to improve the viewpoints and the resolution. A dual layered LCD panel can be used to implement this method, although it has certain limitations. A high-speed LCD has a refresh rate of 120Hz and a brightness of 500cd/m2. An adaptive parallax autostereoscopic display with a high frequency LED panel can solve this problem.