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11 Applications of LEDs
11.1.1 LED Lighting Technology Background
Saving energy, protecting the environment, and developing green lighting products
have been the focus of China’s lighting industry since the early 1990s. Therefore,
when high-efficiency LEDs appeared, they immediately attracted the attention of
relevant domestic funding agencies. In 2003, Ministry of Science and Technology
of China established the “National Semiconductor Lighting Project Coordination
Leading Group”, which started the domestic LED lighting industry. At the beginning
of 2009, Ministry of Science and Technology of China launched the pilot project of
SSL application, which set off the development climax of domestic LED road lamps.
In 2009, in view of the development process of domestic LED lighting, the National
Development and Reform Commission, together with the Ministry of Housing and
Construction and other six ministries and commissions, issued the “opinions on the
development of LED lighting energy-saving industry”, which clarified the development goal of China’s LED lighting industry by 2015. In 2010, the National Development and Reform Commission (NDRC), together with the Ministry of Housing and
Urban-rural Development and the Ministry of Transportation, launched bidding for
50 LED demonstration projects. The relevant ministries and commissions of China
have carried out a series of promotion activities and relevant policies for LED lighting
products. Such activities greatly accelerated the development pace of Chinese SSL
industry and encouraged the application of LEDs.
At present, major application fields of SSL include (1) outdoor lighting, such as
street lamps, tunnel lights, etc. These have been widely used, and energy saving is
remarkable; (2) indoor lighting such as bulbs, and flat panel lamps. Tube lamps have
also been widely used. Other applications, such as buildings and landscape lighting,
which are easy to install, adjustable and design, have considerable influence on the
lighting technique. It can be combined with streets, leisure space in urban lighting.
LED-based signal or indicator with comfortable and flexible surface brightness can
be used for signs where space is limited. In display lighting, such as museum lighting
and shopping mall lighting, the use of LED lamps has great value since it has no
ultraviolet infrared radiation. Its spectrum can be adjusted as well. Stage lighting
and display screen, thanks to the dynamic and digital control ability of LED, open
up new lighting forms for these places. SSL also has great application potential in
vehicle, thanks to the higher efficacy and low consumption of electricity.
11.1.2 Basic Principles of LED Lighting
LED lighting system is the LED application carrier. With the expansion of LED
lighting products and acceleration of industrialization, LED lighting systems are
also evolving. It is one of the development trends to further simplify the function of
the lighting system. In LED lighting systems, luminaire construction, heat dissipation, secondary optics, driver, intelligent control, reliability and cost control are key
technical elements.
11 Applications of LEDs
11.1.1 LED Lighting Technology Background
Saving energy, protecting the environment, and developing green lighting products
have been the focus of China’s lighting industry since the early 1990s. Therefore,
when high-efficiency LEDs appeared, they immediately attracted the attention of
relevant domestic funding agencies. In 2003, Ministry of Science and Technology
of China established the “National Semiconductor Lighting Project Coordination
Leading Group”, which started the domestic LED lighting industry. At the beginning
of 2009, Ministry of Science and Technology of China launched the pilot project of
SSL application, which set off the development climax of domestic LED road lamps.
In 2009, in view of the development process of domestic LED lighting, the National
Development and Reform Commission, together with the Ministry of Housing and
Construction and other six ministries and commissions, issued the “opinions on the
development of LED lighting energy-saving industry”, which clarified the development goal of China’s LED lighting industry by 2015. In 2010, the National Development and Reform Commission (NDRC), together with the Ministry of Housing and
Urban-rural Development and the Ministry of Transportation, launched bidding for
50 LED demonstration projects. The relevant ministries and commissions of China
have carried out a series of promotion activities and relevant policies for LED lighting
products. Such activities greatly accelerated the development pace of Chinese SSL
industry and encouraged the application of LEDs.
At present, major application fields of SSL include (1) outdoor lighting, such as
street lamps, tunnel lights, etc. These have been widely used, and energy saving is
remarkable; (2) indoor lighting such as bulbs, and flat panel lamps. Tube lamps have
also been widely used. Other applications, such as buildings and landscape lighting,
which are easy to install, adjustable and design, have considerable influence on the
lighting technique. It can be combined with streets, leisure space in urban lighting.
LED-based signal or indicator with comfortable and flexible surface brightness can
be used for signs where space is limited. In display lighting, such as museum lighting
and shopping mall lighting, the use of LED lamps has great value since it has no
ultraviolet infrared radiation. Its spectrum can be adjusted as well. Stage lighting
and display screen, thanks to the dynamic and digital control ability of LED, open
up new lighting forms for these places. SSL also has great application potential in
vehicle, thanks to the higher efficacy and low consumption of electricity.
11.1.2 Basic Principles of LED Lighting
LED lighting system is the LED application carrier. With the expansion of LED
lighting products and acceleration of industrialization, LED lighting systems are
also evolving. It is one of the development trends to further simplify the function of
the lighting system. In LED lighting systems, luminaire construction, heat dissipation, secondary optics, driver, intelligent control, reliability and cost control are key
technical elements.