news digest ♦ LEDs
Consumption of HB-LEDs in other miscellaneous applications will become much more segmented with opportunities and accountable, partially attributed to the fact that the tracking of the product use will be more evident, aided by automated inventory and purchasing management at the retail and other supply levels.
Market forecast data in the report refers to consumption for a particular calendar year, therefore this data is not cumulative.
“During the 2010-2020 timeframe covered in the ElectroniCast study report, decreasing average selling prices (ASPs) are forecast to cause challenging growth patterns in consumption value in some application segments. Therefore competitors need to choose the right “windows of opportunity” to climb through,” said Stephen Montgomery, Director of LED market research at ElectroniCast.
According to the study, use of HB-LEDs in Mobile/ Portable Devices is forecast to remain a strong segment although OLEDs are continuing to take market share. The sector is relatively mature versus other sectors and it already has a substantial consumption value. However, there are some emerging “stars” in the portable device category with a very impressive growth pattern forecast for WLEDS (white HB-LEDS).
In terms of consumption value, the use of HB-LEDs in the vehicle category is forecast to multiply by a factor of 7 times, before eventually slipping in value, since declining average prices will offset rising quantity growth in some LED colour segments.
The use of HB-LEDs in stationary or non-vehicle signals is forecast to increase at an average growth rate of 25.8 % (2010-2015) and the use of HB-LEDs in SSL-General Lighting products is forecast to be explosive between 2010 and 2020.
The use of HB-LEDs in the signage/professional display application is forecast to increase at an impressive growth pattern eventually consuming over $6 billion in 2020.
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www.compoundsemiconductor.net January / February 2011
In the consumer backlighting of TV/desktop monitor category, the number of packaged white light emitting diodes that are required per back lighting unit will decline. This will be due to increased luminous efficacy and improvements in supporting optics such as waveguides, components and packaging.
At the moment, ElectroniCast foresees ideas and eventually concepts about 3-7 years before innovation solutions are announced in the public domain.
“Therefore, as we are looking as far as 10-years, many of the future products for the 2020 marketplace are not even at the idea-stage yet. It is also important to note that we, in effect, forecast lighting demand growth, which will drive demand for increased capability/capacity HB-LEDs,” Montgomery added.
Voids Slash Defect Density in GaN LEDs
Defects in the gallium nitride LED film are drawn to voids and become trapped leaving the portions of the film above the voids with far fewer defects.
Researchers from North Carolina State University have developed a new technique that reduces defects in the gallium nitride (GaN) films used to create LEDs grown on sapphire substrates.
LED lighting relies on GaN thin films to create the diode structure that produces light. The new technique reduces the number of defects in those films by two to three orders of magnitude. “This improves the quality of the material that emits light. So, for a given input of electrical power, the output of light can be increased by a factor of two, which is very big.”,” say the authors of a paper describing the research. This is particularly true for low electrical power input and for LEDs emitting in the
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