制造商將專注于LED光質量進一步提高市場份額

　　在其早期的化身，固態照明（SSL）掙扎與傳統照明，因為它是昂貴的，坦率地說，不是很光明。然而，由于制造商提高了他們的設備的輸出和效率和更好的制造技術推低價格，SSL的照明市場份額迅速擴大。

　　今天的質量，從產品的主要供應商提供前所未有的光度和功效，雖然進一步的改進是可能的，當代的產品性能，重點已經轉移到提高“質量”的LED的光。芯片制造商正在研究開發支出美元提高顯色指數（CRI）產品和有限的相關色溫（CCT）與溫度和亮度方差。

　　本文介紹了如何當代LED已經超過傳統照明的功效，而價格差距大幅縮小。然后，文章解釋了制造商如何把注意力轉向光的質量，甚至用戶控制器“顏色調整”，以進一步提高他們的市場份額。

　　A short history of lighting LEDs

　　Many engineers are surprised to learn that the history of the LED stretches back over a century to the discovery of electroluminescence in 1907 when Briton H. J. Round of Marconi Labs experimented with a crystal of silicon carbide and a cat’s-whisker detector.

　　However， the first key discovery that led to today’s high-brightness white LEDs happened in 1962 as a by-product of Nick Holonyak Jr.’s quest to develop a laser diode. Holonyak was employed by Bell Labs and was working with semiconductor diodes comprising gallium arsenide phosphide when he observed that adding more phosphorus to the gallium arsenide material increased its band gap， shortening the wavelength of the emitted light from the infrared to the visible red. Since the light was not coherent， Holonyak’s device was a “light emitting” diode rather than a laser diode.