On August 10-12, the World Science and Technology Innovation Forum was held at the Beijing Convention Center. Many top Chinese and foreign scholars and experts were invited to attend the event to create an unprecedented feast of China's highest level of wisdom, explore global technological innovations, and portray the future blueprint of China's laser pointer technology.
In this forum, Professor Nakamura Shuji, winner of the 2014 Nobel Prize in Physics, gave a speech titled "The Invention of High-Efficiency Blue LEDs and the Future of Solid-State Lighting." In the speech, Nakamura said that LED lighting will play an important role in improving the global ecological environment. "Global warming is indeed a challenge that all countries and governments need to solve. If the world can use LED lighting, it will greatly reduce energy. Consumption."
I will introduce you to our future and also include laser pointer lighting. Let me introduce myself first. Japan consists of four islands. The smallest island is my birthplace. I grew up and grew up here. Later, I went to the University of Tokushima. Tokushima University was a very small school with a very low ranking. After I graduated from Tokushima University, I joined a small chemical company called Nichia Chemical Co., which is a Chemical company. When I joined this chemical company, my job was to develop red, green, blue and white LEDs. I worked for the company for 20 years, and during this work I developed LEDs of various colors. We did not cooperate with any other company outside, nor did we cooperate with the government. It was completely self-developed. After graduating in 1971, I joined the Nichia Chemical Company, which was only 100 people, a very small chemical company.
Introducing LEDs again, red, green and blue LEDs are the result of continuous development in our years. Red LEDs were invented in the 1960s and gradually enriched other colors. Since the 1960s, many scientists around the world have hoped to develop blue and green LEDs. Because we want to enrich its color, we hope to have three primary colors of LEDs, and many scientists around the world have not successfully developed blue and green LEDs. However, we developed high-efficiency blue-emitting LEDs in 1993, and we realized the mass production of blue-efficient LEDs in 1993. You can imagine this difficulty.
Later, in 1995, we also developed green LEDs. According to my experience, I remember that I graduated from Tokushima University in 1979 and joined this Nichia Chemical Company. In the first ten years, I developed traditional LEDs. At that time, my boss Let me develop traditional LEDs, so in the first ten years of my participation in Nichia, we all know that it is a chemical company. It does not have any experience in developing LEDs. It is a chemical, so it is equal to after I join. Only take the lead in developing LED devices from scratch. But there is no sales, because many semiconductor companies have been very successful in traditional LEDs at the time. Compared with our Nichia Chemical Company, it is a very small and a new company. After ten years of hard work, In the process, I started to learn LED technology in 1989, when I read a scientific paper on LED. All scientific papers say that the biggest technical challenge of LED is that there are no blue and green LEDs. If there are blue and green LEDs, it will bring huge market opportunities. So many scientific journals and forums talked about this issue. So I made up my mind to develop green LEDs.