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TECHNOLOGY / LED
with 5.7% of the global white LED market following the leader Nichia with 32.0% and OSRAM OptoSemiconductor with 7.9%.
OLEDs: The OLED summit demonstrates the roadmaps of efficiency and lifetime moving forward on various substrates such as glass as shown in table 1.
Figure 11: The new Philips Lumileds Rebel production yield for tighter binning (red is new binning and blue previous binning process yields).
The company’s capacity and infrastructure investments over the last several years have enabled it to meet customer needs for high volumes of products, with the company delivering over 750 million LUXEON power LEDs in the past two years to automotive, illumination and consumer electronics customers.
Epistar: announce it has developed a High- Voltage (HV) LED chip that enables 135lm/ W white LED at 1W operation in colour temperature of 5000K. It has developed a High-Voltage monolithically integrated DC multiple-chip array to significantly improve current spreading. Consequently, much lower forward voltage and higher Wall Plug Efficiency (WPE) are achieved at 5.5W operation as compared to normal single power chips.
Cree: announce commercial availability of the new 100+ lumen XLamp MX-3 LED. The MX-3 LED extends Cree’s lighting- class performance to a broader set of applications with enhanced light uniformity and LED-to-LED colour consistency. The MX-3 offers design simplicity and flexibility, sharing a common footprint with Cree’s XLamp MX-6 LED, and is ideal for LED bulbs, retail display lighting and high- flux distributed illumination such as cove lighting and wall washing.
Seoul Semiconductor: take third place in the LED manufacturers market share
2009 Tile Size
Lifetime T70 Efficiency
Complexity Features 150x150
5000 h 12lm/W
7 Layers
Scattering Layer
Nichia: this month sees the publishing of recent results from Nichia that has produced a small-sized white LED driven at 20mA producing 14.4 lumens at a CCT of 4600K providing an enhanced efficiency of 249lm/W or 58.5% wall plug efficiency. In addition a single chip, high-power white LED has been significantly enhanced, to achieve 203 lumens at 350mA with an efficacy of 183lm/W for a CCT of 4700K and a wall plug efficiency of 48.3%. The reason these figures are so impressive compared to say Cree, Philips Lumileds or OSRAM’s current high brightness LED emitters is that the Nichia results are based on a 1mm by 1mm LED die. To put this result into perspective the LED driven at 1A produced 511 lumens with an efficacy of 130lm/W which is equivalent to a 40W-class incandescent lamp or 1.5 times that of a tri-phosphor fluorescent lamp. Finally, the Nichia group fabricate an ultra- high power white LED emitter by connecting four LED dies in series. This produces an LED emitter that delivers 1913 lumens at 1A with an efficacy of 135lm/W at a CCT of 4700K and a wall plug efficiency of 37.1%. This single emitter had a lumen output higher than that of a 20W-class fluorescent lamp and was 1.5 times more efficient than that of a tri-phosphor fluorescent lamp. Thus, a one-package LED can replace a traditional fluorescent lamp.
SEPTEMBER Cree: raises the standard for half-watt LED devices with the commercial availability of its XLamp ML-E LED. The lighting-class XLamp ML-E provides lighting designers with a compact and cost-effective solution for distributed LED arrays. The XLamp ML-E delivers lighting-class performance in a small, affordable package with luminous
2010
150x150 25lm/W
10,000 h 14 Layers
Tandem OLED inc. outcoupling
2011
200x200 40lm/W
25,000 h 14 Layers
Temp Stability
flux of up to 58 lm at 150 mA in cool white (5000 K) and up to 48 lm in warm white (3000 K).
Philips Lumileds: announces that it has increased the light output specifications and top performance bins for virtually every colour of LUXEON Rebel LED manufactured. In addition, significantly lower forward voltage for red and red-orange emitters results in very high efficacy LEDs which is critical as lighting engineers strive to reduce luminaire energy consumption.
OSRAM: introduce small colour light emitting diodes. The powerful 1W LED were available in a range of colours - deep blue, true green, amber, red and hyper red, each offering top performance from a small package thanks to the latest chip technology. Typical brightness is 480 mW (deep blue) and 92 lm (true green) at an operating current of 350 mA and 70 lm (amber), 55 lm (red) and 320 mW (hyper red) at an operating current of 400 mA. Like their white counterparts these powerful LEDs are very small (only 3 x 3 mm) and have a narrow beam angle of 80°. The same low thermal resistance of 7 K/W makes thermal management much easier.
IST: launch the world’s first Digital Signal Processor (DSP) based LED drivers offering high efficiency, long life (no electrolytic capacitors on the output stages) and truly configurable LED power configuration independently on each output. Utilising the Texas Instruments high speed Picollo DSP series the new LED drivers can measure the forward current and LED voltage of any connected array in real-time enabling active dynamic power control. With dynamic power control technology LED power can be shared across multiple LED outputs and instead of power being wasted where it is not used it can be directed to channels where more power is demanded. The first product launched with the eco-DSP platform is the iDrive Force containing 24 independent channels with programmable currents up to 1A per channel and Vf voltages up to 48V. The Force-24 offers the
2012 330x330 50lm/W
50,000 h 7 Layers
Internal Outcoupling Table 1: Product Roadmap for OLEDs on Glass Substrates (* Max tile size, layout depends on customisation, size in mm)
2013 330x330 60lm/W
50,000 h 7 Layers
With TFE
2014 330x330 100lm/W
50,000 h 7 Layers
Fully Phosphorent
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