LEDs ♦ news digest
Andreas Vogler, Marketing Manager General Illumination at Osram Opto Semiconductors, says, “Downlights are in widespread use in many areas such as shop, office and residential lighting but need high lumen packages between 1500 and 4500 lm to perform their task. We can achieve these high values with just one LED component. This makes it easier to couple the light into external optics and to integrate the light source in the luminaire.”
Both the E 30 and E 45 have a beam angle of 120° and a lamp life of over 50,000 hours. Thermal resistance is 0.38 K/W for the E 30 and 0.25 K/W for the E 45. Both devices also have a metal core board.
Large lumen packages for use in downlights – the new chip-on- board LED Soleriq E
Only one Soleriq E LED is needed to give a luminaire enough light. This makes designing luminaires much easier because only one component has to be integrated instead of multiple LEDs. The individual chips are all under the conversion layer (chip-on-board), giving the impression of a homogeneous light emitting surface.
Ensuring a uniform colour and light appearance in the luminaire and even coupling into external light-guiding optics is very simple. The light generated can be used with much lower optical losses, making the LED lamps and luminaires more efficient. Osram says typical LED benefits such as high energy efficiency and long lifetime have an excellent impact on downlight performance.
The Soleriq E, available in two versions, covers the entire colour spectrum from 2700 to 6500 K. Even at a temperature of 85°C, which corresponds closely to the temperature in the application, the two LEDs offer an impressive efficiency of 103 lm/W at 4000 K. At this temperature the 36 mm x 36 mm x 1.7 mm E 45 achieves a typical brightness of 4000 lm (rated current 880 mA); the 30 mm x 30 mm x 1.7 E 30 produces a lumen output of 2700 lm (at 600 mA).
Good colour homogeneity is achieved by the narrow white grouping of the Soleriq E, corresponding to a range of 4-step MacAdam ellipses. For solutions that need a particularly high level of colour homogeneity, grouping based on 2-step MacAdam ellipses is also available.
Cree’s new lab LED breaks barriers with 254 lumens-per- watt
Based on silicon carbide technology; this milestone exceeds Cree’s previous R&D industry record of 231 lumens per watt
Cree says it has delivered another industry first with a whopping 254 lumen-per-watt white R&D power LED.
Elements of Cree’s SC³ Technology Platform, used in Cree XLamp LEDs, enable this “record-breaking” R&D result. The SC³ Technology Platform, built on Cree’s advanced SiC technology, features advancements in LED chip architecture and phosphor, and boasts a new package design to deliver the most advanced LED components in the industry.
Cree reports that the LED efficacy was measured at 254 lumens per watt, at a correlated colour temperature of 4408 K. Standard room temperature, 350 mA testing, was used to achieve the results.
“The latest innovation from our R&D labs is another game changer for the industry,” says John Edmond, Cree co-founder and director of advanced optoelectronics. “The core of the Cree R&D culture is a relentless focus on innovation that ultimately drives LED adoption. Higher-performance LEDs can enable new and better LED-based applications and drive down the solution cost of LED designs.”
Korean research centre chooses Veeco MOCVD system for LED R&D
The reactor will be used for gallium nitride based green and UV HB-LED research
High colour homogeneity in the application: Soleriq E is grouped by 4-step MacAdam ellipses
LED-IT Fusion Technology Research Centre (LIFTRC) of Korea recently placed an order for one of Veeco’s TurboDisc K465i GaN MOCVD systems. The tool will be used for research and development of high brightness LEDs, including green
April/May 2012
www.compoundsemiconductor.net 73
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90 |
Page 91 |
Page 92 |
Page 93 |
Page 94 |
Page 95 |
Page 96 |
Page 97 |
Page 98 |
Page 99 |
Page 100 |
Page 101 |
Page 102 |
Page 103 |
Page 104 |
Page 105 |
Page 106 |
Page 107 |
Page 108 |
Page 109 |
Page 110 |
Page 111 |
Page 112 |
Page 113 |
Page 114 |
Page 115 |
Page 116 |
Page 117 |
Page 118 |
Page 119 |
Page 120 |
Page 121 |
Page 122 |
Page 123 |
Page 124 |
Page 125 |
Page 126 |
Page 127 |
Page 128 |
Page 129 |
Page 130 |
Page 131 |
Page 132 |
Page 133 |
Page 134 |
Page 135 |
Page 136 |
Page 137 |
Page 138 |
Page 139 |
Page 140 |
Page 141 |
Page 142 |
Page 143 |
Page 144 |
Page 145 |
Page 146 |
Page 147 |
Page 148 |
Page 149 |
Page 150 |
Page 151 |
Page 152 |
Page 153 |
Page 154 |
Page 155 |
Page 156 |
Page 157 |
Page 158 |
Page 159 |
Page 160 |
Page 161 |
Page 162 |
Page 163 |
Page 164 |
Page 165 |
Page 166 |
Page 167 |
Page 168 |
Page 169 |
Page 170 |
Page 171 |
Page 172 |
Page 173 |
Page 174 |
Page 175