Comparing OLED to plasma and LCD
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OLED TV technology keeps making headlines. Talk around town says OLED televisions are the latest and the greatest—but is that true?
Is OLED really that much better than what you have in your living room? We got up close and personal with OLED TVs from LG and Samsung this summer—but Dr. Raymond Soneira actually got one into a laboratory. His test results indicate that from top to bottom, the rumors really are true: LG's OLED TV outperforms older technology on almost every front.
Below, I've outlined Dr. Ray Soneira's lab results for the LG 55EA9800, to show you just how much better OLED TVs can be. See for yourself:
Minimum Luminance Reading: Perfect.
Dr. Ray measured a true black level, which is to say, the complete absence of light. Even plasmas don't get this dark, and LCDs don't even come close. This is the single most important area of television performance, and LG's OLED knocks it out of the park. With a perfect black reading, a television has a theoretically infinite contrast ratio.
Peak Brightness Reading: 135 cd/m2 to 308 cd/m2
On THX Cinema mode, Dr. Ray noted a reading of 135 cd/m2 . This level is plenty bright for most environments, but the television can actually ramp up even brighter on ISF Expert modes—to a dazzling 308 cd/m2 . A theater-like environment will always render the best-looking picture, though, so dim the lights and pull those shades for optimal quality.
Color Gamut: Displays 99% of the Rec. 709 international standard
This performance is visually indistinguishable from perfect HDTV color accuracy.
Expanded Color Gamut: Capable of 116% of the Rec. 709 international standard
This result means that the OLED TV can handle expanded color gamuts, not just the standard. In fact, this comes close to the Adobe RGB standard used by graphic design professionals.
White: visually indistinguishable from perfect
Red, Green, Blue: visually indistinguishable from perfect
Gamma (Gray Scale): visually indistinguishable from perfect
Total Viewing Angle: visually indistinguishable from perfect within ±30º horizontally
LCDs have the worst performance of the three technologies in question, typically dropping as much as 60% in brightness and 50% in overall contrast at angles of 30º. Plasmas tend not to struggle much in this way, since like OLED TVs they do not use backlights. Nevertheless, this LG boasts the best total viewing angle Dr. Ray has currently ever measured, once again putting OLED TV at the top of the foodchain.
Dr. Ray also addresses the question everyone seems to be pulling their hair out over: What's with the curve? The curvature, he indicates, reduces the screen’s 180-degree opening angle, which removes reflections from ambient lighting on the sides. Additionally, the curve also takes ambient light from behind watchers and directs it away from the line of sight.
Response Time: 0.1ms
By photographing the LG OLED and an LCD with the same motion response times, and comparing the images, Dr. Soneira found that this OLED is "more than a factor of 10 faster than LCDs." LCDs use backlights that shine through liquid crystal to make an image. Since the liquid crystal TVs (LCDs) must twist and untwist to regulate light to form an image, the process is more time consuming than with OLED (organic light emitting diode) displays, which don't use backlights.
What about plasma? Dr. Soneira doesn't discuss this in particular, but it's a well-known fact that plasmas have excellent motion performance; since each plasma cell is individually wired, response times are immediate and precise. OLEDs have the same advantage, and any improvements they make will likely be unappreciable to the human eye.