Nanosys Quantum Dots HDR color vs OLED, Speed demo vs KSF phosphor

Posted by Charbax – February 23, 2019

Nanosys shows Vizio P Quantum, with 2,400 nits of peak luminance and full DCI-P3 coverage compared with LG's latest OLED display for using with UltraHD 4K HDR content. Nanosys uses AJA Video Systems’ HDR Analyzer tool that uses color science from Color Front to analyze the luminance and color chromaticity of every pixel in a piece of content real time. Looking at BT.2020 HDR10 content graded at 4,000 nits they are able to observe how the two different TV technologies respond.

Quantum Dots deliver the widest color gamut and highest peak luminance for a lifelike HDR content experience, they are also the fastest wide gamut technology. Nanosys shows a wide color gamut speed shootout comparing the response time of Quantum Dots to KSF phosphor, a competing wide color gamut technology. Quantum dots can be switched on and off in a matter of nanoseconds while KSF phosphor takes milliseconds to respond. While milliseconds sounds pretty fast, it isn’t fast enough for Full Array Local Dimming (FALD) displays when it comes to high frame rate content. Quantum Dots respond in perfect synch with the signal for clear motion and near-perfect black levels. In KSF displays, the red component needs time to warm up and cool down over several milliseconds. In the soccer ball example below this slow response time causes a cyan leading edge and a red trailing edge as the ball moves across LED zones on the display.