As one of the important accessories in liquid crystal products, the backlight has developed rapidly in recent years, and new technologies and new products have been introduced. Among them, LED (light-emitting diode) backlight market share is gradually increasing. In notebooks, monitors and televisions and other products, the original has been the use of CCFL (cold cathode fluorescent lamps) backlight, since 2007, notebook and display products in the use of LED backlight has been expanding. Statistics show that in the first quarter of 2015, the number of LED backlight shipments was 10 times times that of the same period in 2007.
At the same time in CCFL dominated LCD TV field, with Hisense launched the first LED backlight TV, the domestic market LED backlit TV products have sprung up in the market. Since 2007, LED backlight has gradually entered the industrialization, the market share continues to expand.
From the beginning of the use of laptops, to now used in monitors, LCD TVs, LED backlight products continue to emerge, market share continues to increase. Compared with the cold cathode lamp, the advantages are manifold. The first is energy-saving, cold cathode lamp photoelectric efficiency in the 60lm/W around, and the current commercial LED efficiency has reached twice times this value, in the laboratory samples can be doubled. Secondly, the LED will bring about a huge change in the mechanical structure design of the backlight.
Because the LED volume is small and the light direction is good, can greatly reduce the traditional backlight light guide plate thickness. In addition, mercury in cold cathode lamps is a substance that has high recovery costs and is very harmful to the environment. From the environmental protection point of view, LED gradually replace the cold cathode lamp will also be an inevitable result. The application of LEDS may bring disruptive changes to the backlight.