LG displays are considered WRGB OLEDs because they use blue and yellow OLED compounds to create white pixels, with red, green and blue sub-pixels created through color filters. Recent OLED TVs also have a fourth unfiltered/white sub-pixel designed to boost brightness, especially for HDR content.
QD-OLEDs change this by emitting blue light through the quantum dots, converting some of the blue to red and green without any color filter, which leads to higher light energy efficiency, since no light is lost to the color filter On a light sheet, QD-OLED TVs should offer higher brightness than previous-generation OLED products. Sony claims that QD-OLED can improve color brightness by 200% compared to conventional TVs.