If you have read the OLED vs LCD Comparison guide, you will know that OLED is superior to LCD in some very important areas. So how do OLED TVs compare to LED TVs? Read on..
Contrast and Black Levels
If you have researched 'LED TVs' then you will know they are essentially just a slightly different version of LCD, and not true LED as the name suggest. LED TVs using White Edge-LED still need to filter light away from the screen to create dimmed areas, whilst screens using Dynamic RGB backlights have the advantage of being able to turn off the LEDs in the areas that require a dark image. In this way Dynamic RGB LEDs are similar to how OLED TVs create dark areas, they simply stop producting light altogether. This means they also use no energy whilst creating better black levels. OLED TVs will create much better dark areas than White Edge-LED Screens, but the benefit over Dynamic RGB LEDs will not be as profound.
OLED TV's have the ability to create every colour in the spectrum due to the fact they emit all three of the primary colours; red, green and blue. LED TVs using White Edge-LEDs produce white light which the primary colours are then extracted from in different amounts as the light passes through the LCD matrix to produce the required colour. TVs using Dynamic RGB LED backlights are able to produce the primary colours in the same way OLEDs can, but the light still passes through the LCD matrix to produce the image.
OLED TVs therefore use a much simpler process to create the required colour, resulting in much richer and truer colours. In this case OLED again is a clear winner.
Due to the way light is created by OLED TVs, they offer an almost perfect 170 degree viewing angle, as every pixel can be seen clearly. LED TVs still suffer in this department, but do offer an improvement over LCD TVs using CCFL backlights. Once again, OLED TV trumps LEDs in this category.
OLED TVs currently have one major flaw, and this is it! Currently the Blue LED only has around a 10,000-14,000 hour lifespan, although recent developments have gone some way into correcting this. However the 100,000 that standard LED TV manufacturers are quoting are far superior to OLED for the time being.
Cost and other factors
Cost is another area in which OLED TV still has some way to go before the everyday user will seriously consider purchasing one. Prices for the Sony XEL-1 can vary between £1,500 and £3,500 depending on the retailer. LED TVs however, although still expensive when compared to LCD TVs, can retail fur up to £2,000 themsleves, but for this price expect to get a 40"+ screen size compared with the 11" screen on offer with the XEL-1.
LG recently released a 15" OLED TV in Korea which is set to hit Europe in 2010 for around £1,500, shhowing the price is becoming slightly more realistic. LG recenly claimed they would be offering a 40" OLED TV at an affordable price, although I wouldnt be suprised to see this top £3,000 when released. Only time will tell!
A couple of other points worth mentioning are repsonse time and energy consumption. Response time for LCD and LED TVs currently stands at around 2ms, but OLED TVs can have less than 0.01ms response time. Due to the way in which OLED TVs produce colours and also create dark areas, no energy is wasted by polarising filters in the screen meaning they are far mor efficient than LCD and LED.