LED has potential but failed to become the main force of lighting

Interview with Professor Chen Dahua, Deputy Secretary General of China Lighting Society

Reporter: Recently, various lighting media have reported on LED lighting technology and products. Some people even said that "high-brightness LED will be one of the greatest inventions after humans invented incandescent bulbs." As a well-known expert in lighting, you Think LED is the most ideal lighting fixture in the future? What is your opinion on its future development?

Professor Chen: LED enters the field of lighting. This is the gospel of scientific and technological progress and humanity. It has many advantages and great potential, but it has not yet become the main force in the field of lighting, and it has to be researched, developed and improved. Now everyone is paying attention, encouragement and full financial and energy investment. It is very necessary and good at LED progress, but it is too high or easy to be rated as the "most" grade. This is hard for Chinese people of our age. Accepted, according to the experience I have experienced in the past, my idea is to be more pragmatic and effective.

Reporter: I read the latest information about LED products and found that their products are mainly used in automotive lighting and outdoor lighting, but not indoor lighting. Do you think there is any difficulty in using LEDs for indoor lighting?

Professor Chen: LED has been widely accepted in decoration, landscape, signal, red and green traffic lights, garden lights, car lights and some special-purpose lighting, but its heat dissipation, optical design, single-frequency power and output luminous flux The price/performance ratio is still unsatisfactory, and of course the light effect needs to be further improved. At present, the luminous efficacy of commercial white LEDs is still 50-60lm/W, and the price of 1W white LEDs is about RMB 30. These need to be improved and improved to make more use of indoor lighting.

Reporter: Saving energy In addition to using low-energy products, the use of renewable energy is also an effective means. Recently, Sharp and other companies have successively launched solar LED lighting products. Can this be seen as a direction for LED development?

Professor Chen: In combination with LED and solar energy and wind energy, due to the low-voltage driving characteristics of LED, it has application advantages, and human existing traditional energy sources such as oil, coal, natural gas and nuclear energy are all within 200 years. To be exhausted, it is effective to promote renewable energy such as solar energy and wind energy. LED lighting is an inevitable trend in this respect, and it also has considerable advantages.

Reporter: The weather in the coastal cities of southern China is cloudy and uncertain. During the rainy season, the sun is not enough, and the wind is not large. Will these factors affect the promotion of solar energy and wind energy?

Professor Chen: These problems can technically solve the problems of insufficient sunshine and limited wind energy, and even adopt a strategy of complementary power supply and renewable energy. The problem is still the practical problem of inefficient use of solar and wind energy and high cost. This issue has yet to be made more by the scientific and technological personnel of renewable energy.

Reporter: You are not only engaged in the research of optical power, but also the tutor of doctoral students. Can you talk about your personal ideas in the training of electric light source talents?

Professor Chen: As a teacher, I think now is the era of information leap development, innovation is the soul of industry development, independent intellectual property rights are the real source of corporate profits, and all of this is determined by talents, training electric light source talents is China's electricity The important and fundamental measures for the manufacture of the largest country in the light source to become a powerful country, "a decade of tree planting, a hundred years of tree people", hope that more people of insight can care about education, I hope that students can study hard, grow up, and truly become The talent of the country. This is also an important duty that the times have given us to be sacred teachers.

Introduction to Professor Chen Dahua:

He graduated from the Physics Department of Fudan University in February 1965 and has been working in the school until now. He studied at Keele University in Germany from 1982-1984 and went to the National Institute of Science, Technology and Standards (NIST) in 1989-1990.

Position:

Deputy Secretary General of China Lighting Society and Deputy Director of Electric Light Source Committee, Vice Chairman of Shanghai Lighting Society

Head of Department of Light Source and Lighting Engineering, Fudan University

International Lighting Commission TC-7 China Representative

Director of Editorial Board of "Lights and Lighting" magazine

Deputy Director of the Editorial Board of China Lighting Appliances Magazine

main experience:

He has been responsible for participating in many research projects, and has passed provincial and ministerial level appraisals and awards, such as "CFL with gallium glass development" (tortor program implementation), "movie screening lamp" (Ministry of Culture Award), "pulse xenon lamp in high-speed photography" Application" (National Science and Technology Commission second prize), electronic ballast tester (Shanghai Science and Technology Progress Third Prize and Shanghai Invention Association Second Prize). In recent years, he has been mainly engaged in low-temperature plasma physics research and its application, and has made breakthroughs in microwave plasma lighting applications, ranking first in China. The microwave sulfur lamp developed by the company won the Silver Medal of the Domestic Invention Expo and the National College Student Challenge Cup Gardener Award of the Ministry of Education. He has published more than 180 papers in domestic and foreign magazines, and has edited and translated more than 10 books, totaling more than 4 million words. He has been teaching undergraduate and postgraduate work for many years and has been well received by students. He has been awarded many awards by the school and the department.

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