Are quantum dots ready for prime time OLED challenge?
The report entitled ‘Phosphors & Quantum Dots 2015: LED Downconverters for Lighting & Displays’ considers the impact of the quantum dots development on the display and traditional phosphors industry.
After the lukewarm reception of 3D and 4K, Yole predicts that the display industry needs a new and disruptive experience improvement to bring consumers back to the store. Image quality perception increases significantly when color gamut and dynamic contrast ratio are improved. Leading movie studios, content providers, distributors and display makers gathered and formed the ‘UHD Alliance’ to promote those features.
“OLED was believed to be the technology of choice for this next generation of displays. But production challenges have delayed the availability of affordable OLED TVs. LCD TVs with LED backlights based on quantum dots downconverters can deliver performance close to, or even better than OLED in some respects, and at a lower cost”, suggested Dr Eric Virey, Senior Analyst, LEDs at Yole.
The report indicates that until OLEDs are ready, QD-LCD have a unique window of opportunity to try to close enough of the performance gap that the majority of the consumers won’t perceive the difference between the two technologies and price would become the driving factor in the purchasing decision. Under this scenario, QD-LCD could establish itself as the dominant technology while OLED would be cornered into the high end of the market. OLED potentially offers more opportunities for differentiation but proponents need to invest massively and still have to resolve manufacturing yield issues. For tier-2 LCD panel makers who can’t invest in OLED, QDs offer an opportunity to boost LCD performance without additional CAPEX on their fabs. Yole pointed out that at the 2015 CES, seven leading TV OEMs including Samsung and LG showed QD-LCD TVs.
With tunable and narrowband emissions, QDs offer design flexibility. But more is needed to enable massive adoption, including the development of further improved Cd-free compositions.
And according to Yole traditional phosphors are not finished. If PFS could further improve in term of stability and decay time and a narrow-band green composition was to emerge, traditional phosphors could also be part of the battle against OLED.
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