LED Light Achieves The Colour Rendering Of Sunlight Hubert Ott Technical Marketing Director Lighting EMEA @ Avnet Silica
The Evolution of Light The latest mass market technology is the LED.
Records, Records, Records, For the past 20 years one record about LEDs was chasing another record. Efficiency record Brightness record Smallest package Highest lumen package Whitest white. Will it go on like this?
LED Price & Performance Development Source: DoE MYPP 2006-2013 The annual steps of efficiency increases and price reductions are continuously getting smaller Good for the end customer - A challenge for every company in the lighting industry
How can we differentiate over the next years? One solution to the problem could be the Light Quality, but and LIGHT LIGHT 3000K, CRI90 3000K, CRI90
380 380 420 460 500 540 580 620 620 660 660 700 700 740 740 780 780 Color Mixing and Correlated Color Temperature Yellow Phosphor Red Phosphor 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 Blue pump 0.2 0.1 0.0 wavelength (nm)
Colour Metrics To Evaluate Colour Quality
Understanding TM-30 Decreased Gamut Increased Gamut Tradeoff between fidelity and gamut (Rf vs Rg) 140 Color shift in any direction will reduce fidelity There is a fundamental limiting relationship between fidelity and gamut. Perfect fidelity (Rf=100) can only be obtained when colors exactly match those under the reference illuminant, thus yielding no variation in chroma (Rg =100). 130 120 Color Distortion Graphics Interpretation Shows the shifts in chromaticity from the reference illuminant to the light source being evaluated. Where the light source extends beyond the boundary of the reference illuminant, those hues will be more vivid and saturated Gamut Index, R g 110 100 90 Reduced fidelity Reference Illuminant Spectral Power Distribution Color distortion graphic 80 70 60 Fidelity Index, R f 50 60 70 80 90 100
Examples For Colour Vector Graphics
equal energy GAI=100 Crisp Colour Technology For Saturated And Vivid Colours 2200K CRI90 4000K CRI90 3000K CRI90 3500K Gamut Area for R1 - R8 Reference Sources 0.56 0.54 0.52 0.5 CrispWhite 3000K CRI90 2700K CrispColor 5000K CrispColor 4000K CrispColor 3500K v' 0.48 0.46 CrispColor 3000K CrispColor 2700K 0.56 0.44 CrispColor 0.54 3250K 0.42 0.52 0.4 0.14 0.16 0.18 0.2 0.22 0.24 0.26 0.28 0.30.5 0.32 u' equal energy GAI=100 daylight GAI=93 High GAI 3000K GAI=80 3090 COB GAI=57 3080 COB GAI=53 v' 0.48 0.46 0.44 0.42 Gamut Area for R1 - R8 Reference Sources 0.4 0.14 0.16 0.18 0.2 0.22 0.24 0.26 0.28 0.3 0.32 u'
Standard LED 3000K, CRI90 (Lumileds) Spectral Power Distribution Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10 Q11 Q12 Q13 Q14 Q15 TM-30 Color Vector Graphic 140 Rf / Rg Plot 130 120 110 Color Data CCT 3,061K CRI - Ra, [R9] 93 [58] 10 8 6 CQS (C Test-Ref) Gamut Index, R g 100 90 80 GAI CRI 54 CQS - Qa 92 4 2 0 70 TM-30 Rf 88 TM-30 Rg 96-2 -4 60 50 60 70 80 90 100 Fidelity Index, R f
Crisp Colour LED 3000K, CRI90 (Lumileds) Spectral Power Distribution Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10 Q11 Q12 Q13 Q14 Q15 TM-30 Color Vector Graphic 140 Rf / Rg Plot 130 120 110 Color Data CCT 3,001K CRI - Ra, [R9] 91 [93] 10 8 6 CQS (C Test-Ref) Gamut Index, R g 100 90 80 GAI CRI 80 CQS - Qa 94 4 2 0 70 TM-30 Rf 91 TM-30 Rg 103-2 -4 60 50 60 70 80 90 100 Fidelity Index, R f
Luxeon Stylist Series in COB and MidPower CoB MP NEW! TECHNOLOGY CCT 1202s 1216 3535L (100mA) 2835 (120mA) 2700K 653 lm 5,549 lm 33 lm 41 lm 3000K 700 lm 5,859 lm 35 lm 43 lm 3250K 720 lm 6,102 lm 37 lm 45 lm 3500K 729 lm 6,210 lm 37 lm 46 lm 4000K 767 lm 6,515 lm 38 lm 47 lm 5000K 796 lm 6,766 lm 40 lm 50 lm Typ. Values
SunLike Technology vs Conventional White LEDs
SunLike LEDs CCTs Cover The Full Day
Higher Contrast With SunLike LEDs
SunLike LED: 2700K, CRI97 (Seoul Semiconductor)
SunLike COBs From Seoul Semiconductor
SunLike MidPower From Seoul Semiconductor
Go For Differentiation CCT and CRI do not allow to evaluate the quality of colour renderings when objects become illuminated with LED light. Lumileds and Seoul Semiconductor offer COBs and Mid Power LEDs with better colour rendering quality. COBs and Mid Power LEDs allow spot light luminaires, downlights, linear and area luminaires to be realized in best colour renderings.
Summary Because of the price & performance development of LEDs new differentiation criteria gain importance. The profitability of LED luminaires or LED lighting systems are under pressure. Colour quality becomes a clear differentiation criteria. There is no metrics currently which describes light quality or true colour rendering in a fair and easily understandable way. The best way to evaluate the colour rendering differences of illuminated objects is to physically compare light sources and make up one s mind after individual reviews. The challenge to take on is to find new ways how to market better light qualities without the CRI number.
Thank you. Hubert Ott Tech. Mktg. Director Lighting EMEA hubert.ott@avnet.eu +49 171 876 6283