OSRAM Opto Semiconductors GmbH developed a 1A green LED with a luminous flux of 191 lm, a luminous efficiency of 48 lm/W and a wavelength of 527 nm, and was held in Las Vegas, USA, in 2007. Released at the exhibition from September 16 to 21 (speech serial number: D1). The chip size is 1mm square. At 350 mA, the luminous flux is 100 lm, the luminous efficiency is 81 lm/W, and the wavelength is 532 nm. In addition, a product having a chip size of 460 μm × 255 μm and a luminous efficiency of 107 lm and an oscillation wavelength of 532 nm when driven by 20 mA was also experimentally produced. Both products are brighter than the company's original products. A light source as an image display device such as an LED projector is conceived.
This time, the brightness has been improved by improving the "Droop" phenomenon. Droop refers to a phenomenon in which the luminous efficiency of an LED having InGaN as a light-emitting layer such as a blue LED or a green LED is lowered when the input current density is increased.
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Shenzhen Ruidian Technology CO., Ltd , https://www.wisonens.com