TOYOTA synthesis: LED's contribution to environmental protection and its application in backlight

TOYOTA internal and external decoration parts of the business development department of the Takahashi Rinori held in Makuhari Messe "CEATEC JAPAN 2008", with "LED for the earth's environmental contribution and application" in the backlight for the theme of a speech.

During the lecture, Takahashi cited the main contribution of the LED to protect the earth's environment: LED low degree of environmental pollution, can reduce waste and is expected to reduce CO2 emissions. LED is different from the current incandescent lamp, mainly use fluorescent lamps and HID lamps, not to use lead (Pb) and mercury (Hg) and other environmental pollution substances, but also has the characteristics of long service life, so it can reduce the waste caused by changing. In terms of the reduction of CO2 emissions, Takahashi said that if the Japanese traffic signal equipment to replace incandescent LED, then 1 years of CO2 emissions can be reduced by about 378 thousand tons. In addition, 1 years of sales of white lighting appliances LED light source to replace incandescent lamps, the annual energy consumption can be reduced by about 11 billion 100 million kWh. This is also equivalent to a reduction of about 4 million 200 thousand tons of CO2.

In the application of LED backlight, it is necessary to further improve the luminous efficiency with the development of personal computer and other fields. To improve efficiency, must be designed and improved back light chip design and development of fluorescent materials and packaging methods, and to prolong service life, must develop not easy degradation of resin materials and lighting materials, improved heat resistance and stress design etc..

In addition, Takahashi also calculated the car navigator equipped with 8 inch LCD panel backlight will be CCFL (cold cathode fluorescent tube) to replace the power consumption of LED. The results show that although the energy consumption and the life of LED is the same as that of CCFL, the environment is protected by the use of mercury. In the future, by using the panel is configured below the brightness of the LED can be controlled according to the local area of the image signal Dimming (Local) technology, is expected to reduce the overall power consumption of lighting appliances.

In terms of the luminous efficiency of LED, it is expected that the luminous efficiency of LED will exceed that of fluorescent lamp before and after 2010.

Source: Nikkei BP