Update Time:12/3/2009

In the last decade, LEDs have become something more than the electronic components. Retaining its signal and display functions, the new high-brightness LEDs have begun replacing incandescent bulbs and neon lamps. Although bulbs Ilyich more firmly in their cartridges, the prospects for the global lighting market in the coming decades are viewed as a complete replacement of traditional lighting LED lights (led light) over the world. End and edge of this process is not visible, and the only constraint on the transition to LED technology in lighting, is the price issue. Currently, LEDs can achieve the ratio $ 0.1-0.05 dollars per lumen, which is two orders of magnitude higher than for conventional lamps.

LED manufacturers quickly realized that now the main determinant of prices is not the functionality of the LED, and emits its luminous flux. In this regard, they asked the question: how we can improve the efficiency of LEDs and reduce their cost?

 

Increasing efficiency output of light can be realized in various ways: improving the quality of materials, improving the structure of the chip and the technology of its formation, texturing the surface, improving the properties of the substrate, etc.

 

Impairment light can be achieved by increasing the density of current passing through the LED chip. If the dependence of the quantum yield of direct current is very linear up to certain values of current without saturation, the flow of light emanating from a single emitter with the same size chip, can be several times higher at higher currents. Sotovetstvenno ratio dollar / lumen will be less.