Saphlux releases red Micro LED solution for AR, with 2 micron pixel color conversion efficiency reaching 67%!

Recently, the Saphlux team from Yale University (Saflux Semiconductor Technology Co., Ltd.) released an NPQD® Micro LED light engine specially designed for AR red light displays. It achieved a red-to-blue light photon conversion efficiency of 67% at a pixel scale of 2 microns, providing a solution to the small-size red light problem that has plagued the industry for a long time.

As we all know, in AR Micro LED display applications, the red light efficiency and three-color integration problems caused by the smaller chip size are currently the main bottlenecks hindering the development of the industry. The luminous efficacy of traditional aluminum indium gallium phosphorus (AlInGaP) red Micro LEDs will drop sharply as the chip size shrinks, resulting in the red used in existing AR applications. Micro LED has many problems such as low efficiency, high heat generation, and insufficient brightness.

Based on unique nanopore quantum dot (NPQD) technology, the Saphlux team released 2 micron full-color NPQD@ Micro LED in October last year, achieving a breakthrough in full-color technology. Recently, the Saphlux team has optimized red NPQD® Micro LEDs smaller than 5 microns in response to market demand, improving efficiency while solving problems such as color crosstalk and color purity, and launched a new generation of red NPQD® Micro LED light engines.

The red NPQD® Micro LED light engine can achieve a brightness of 480,000 nits. The current WPE is 5.4%, and when the brightness is increased to 740,000 and 930,000 nits, the WPE is still maintained at 4.2% and 3.5%. The chip's comprehensive red-to-blue energy color conversion efficiency reaches 48%, and its red-to-blue photon conversion efficiency reaches 67%. It has passed a 3,000-hour third-party on-screen reliability test, truly pushing the high-efficiency, high-brightness, and high-reliability red NPQD Micro LED to the commercial stage.

At the same time, the half-peak width of NPQD® Micro LED red light reaches 23nm, and the color gamut exceeds DCI-P3 and is close to the Rec. 2020 standard. It is reported that Saphlux is currently cooperating with a number of industry leading companies to provide NPQD® red and full-color Micro LED light engine solutions for next-generation AR displays.