What is the difference between OLED and QLED?

Although both QLED and OLED share similar properties, OLED is still widely considered to be the better display technology overall. This is due to the self-illuminating pixels of OLED which leads to better contrast, viewing angles, and color depth. QLED does have the advantage however when it comes to brightness and price, QLED is brighter than OLED and is noticably better in well-lit areas. OLED is also more expensive and is not as widely available compared to QLED panels.