Q. What is the difference between OLED, QLED and ULED TVs?
—G.R., San Jose, California
A. OLED is organic light-emitting diode. All the pixels in an OLED display create their own light and color. OLED is the true successor to plasma by virtue of these self-illuminated pixels, and this technology has the best overall image quality among flat-panel television types. This comes at a higher purchase cost and a risk of burn-in. I hate to keep bringing up the issue of burn-in, but the risk is there and it must be stated. OLED TVs in sizes above 70 inches tend to be very expensive. OLED televisions are primarily marketed by LG, Samsung and Sony.
