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Jade Bird Display Reports Efficiency of Red and Green Micro LEDs to be 10% 7.5% of Blue, Respectively
We have often opined on the difference in efficacy between blue, red and green LEDs and how the efficiency degrades as the size decreases. The following charts give a representation of the status of efficiency by size by color.
We have often opined on the difference in efficacy between blue, red and green LEDs and how the efficiency degrades as the size decreases. The following charts give a representation of the status of efficiency by size by color.
These reports tend to be theoretical or at best lab experiments. However, recently, DSCC’s Dr. Guillaume Chansin reported that Jade Bird Display (JBD) confirmed the availability of a 0.13” (3.3 mm) microLED display with a 4 μm pixel pitch to be released in November in monochrome red, green and blue. It features a resolution of 640×480. JBD claims the world’s smallest and brightest VGA display panel ever made. The size and resolution translate to 6,154 dpi, although the company did not specify an exact value. Chasin’s report is available at: https://www.displaysupplychain.com/blog/jade-bird-display-starts-mass-production-of-0-13-microled-display
JDB appears to be the first company to provide commercial differences in LED RGB performance.: Luminance for blue is 2m nits, red is 200K nits and green 150K nits all at 4um. Based on the Jade announcement, which put blue luminance at 2m nits, red at 200k nits and green at 150k nits and assuming the manufacturing process is the same for each color, the efficacy of red is 10% and green is 7.5% of blue, which if the blue had an EQE of 40%, would put the EQE of red and green at 4% and 3%, respectively.
JDB appears to be the first company to provide commercial differences in LED RGB performance.: Luminance for blue is 2m nits, red is 200K nits and green 150K nits all at 4um. Based on the Jade announcement, which put blue luminance at 2m nits, red at 200k nits and green at 150k nits and assuming the manufacturing process is the same for each color, the efficacy of red is 10% and green is 7.5% of blue, which if the blue had an EQE of 40%, would put the EQE of red and green at 4% and 3%, respectively.
