Nick Holonyak Jr. invented a visible red-light diode. His 41 patents also included lasers that enabled DVD and CD players. The godfather of LED has died. He was 93.
source https://www.seattletimes.com/business/technology/nick-holonyak-jr-pioneer-of-led-lighting-is-dead-at-93/?utm_source=RSS&utm_medium=Referral&utm_campaign=RSS_technology
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