tony oram, uk sales manager - seoul semiconductor evaluating led lighting solutions
Post on 14-Dec-2015
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Who/Where are Seoul Semiconductor
• 3 corporate (Japan/Germany/USA)
• 25 sales offices
• 90 distributors
Seoul Semiconductor Europe GmbHSeoul Semiconductor Inc.
Japan Seoul Semiconductor Co.,Ltd
Outlets Factories Subsidiary (SOC)
HQ (Seoul Semiconductor)
Subsidiary (Seoul Optodevice)
Tian Jin Factory
Ansan Factory
Seoul Factory
Shenzhen
Shanghai
Taiwan
Nagoya
Tokyo LA
DetroitNew Jersey
SET AtlantaSpainItalyNumberg
Poland
DenmarkUK
FrankfurtFrance
Netherlands
Worldwide-
*4th LED manufacturer
3rd White LED manufacture * Strategies unlimited
EPA recognized test lab
Revenue2010: US$ 1019M
Employees: 2932
New Ansan factory , Ramp up May 2011
Who/Where are Seoul Semiconductor
Acriche, Power LED, Side View LED, Top View LED, Radial LED, Chip LED, high flux LED, deep UV, near UV, Customized module
3) Broad Portfolio
2) Cost competitiveness
Volume production (3.5 billion chips per month)
4) Worldwide production capabilities
Technology centers and factories in USA, Korea and China
1) Vertical integration from chip to package
EPI growing → FAB (fabrication) → PKG → Custom modules
Who/Where are Seoul Semiconductor
LED Chips Package
Module/
Light engine Fixtures
SSC
Philips, Cree, Osram, Sharp, …
Citizen, Everlight
Epistar
Focus component level
SSC will not compete with customers
Strategy in LED Value Chain
1. Recent developments within LED industry
2. Testing standardisation by market leaders
3. Assessing light quality by CRI and bin indexing
Presentation Overview
•Lumens per watt current and future
•Package changes and harmonisation
•Patents and licensing
Recent Developments in the LED Industry
Lumens per Watt is a simple ratio of output of luminous flux to input of electrical power
Luminous flux
Electrical power
This measurement can be applied to any light source and finished lighting fixturesFrom this measurement we can also calculate Lux and Candella values
http://www.element-14.com/community/docs/DOC-21394/l/light-conversion-tool
Lumens per Watt
Parameter SymbolValue
UnitMin Typ Max
Luminous Flux V 80 100 120 lm
Luminous Intensity IV 1.0 1.5 2.0 Cd
* Luminous Flux (V )
- Lumen [lm]
* Luminous Intensity (V )-Candela [Cd] (lm/sr)
Integrating Sphere
Buffer
Detector LED
LEDDetector
Measuring Output
Current maximum production values are between 100 – 120 lm/W
Expected values by end of 2011 using existing technology are 150 lm/W
Some press release values are claiming over 200 lm/W however this is notavailable in the market place
Theoretical limit is between 260 and 300 lm/W (dependant on who you talk to)
Steady increase in efficacy from 20 lm/W in 2002
Some leaps in technology needed to get to theoretical limit
For lighting the efficacy levels are now ‘GOOD ENOUGH’
LED Lumens per Watt
Package changes and harmonisation
2010/11 has seen a move away from traditional LED packages
Packages with smaller footprints based around ceramic sub-straights are now becoming standard
There is also and emergence of footprint compatibility between LED manufactures
Patents and Licensing
Apart from a few minor issues, Patent and Licensing agreements amongst the big 6 are now in place.
Collectively they hold over 90% of all LED Patents
Big 6:
Seoul SemiconductorCreeOsramPhilipsNicheaToyoda Gosei
Some issues are still to be resolved on driver and heat management patents.
Beware of non patented product or 2012 could get very nasty for YOU
White LED Cross License
White and housing patent
cross-license agreement
Cross-license agreement
Strategic Cooperation
Patents and Licensing
+ UCSB in USAAnd Others +
Global Leading with over 5,500 patents
Material Patent
Manufacturing/Methodology Patents
Design Patent
Exclusive License
Nonexclusive License
Patents and Licensing
LM80
There is now universal adoption of LM80 testing by the major LED manufactures
LM80 allows direct comparison of expected LED lifetimes and failure rates.
LM80 calls for 6000 hours real time testing and projects when an LED will reach the end of its useful life
LM80 testing completed at 25, 55 and 85 Deg C
Useful life is generally accepted as L70 (70% of original output) for lighting
LM80 gives readings over lifetime for:
Forward Voltage changeFlux (light output) depreciationColour Shift
50 55 60 65 70 75 80 85 90 95 100 105 110
0
10,000
20,000
30,000
40,000
50,000
60,000
70,000
5630 (D:30%)
Degradation graph of Luminous output
Tim
e (
Hr)
Junction Temperature (oC)IF=100mA
where
R(t)= LED Operating time till “t”
λ = Failure rate
t = Lifetime
λ1 = Failure rate (TJ = T1 )
λ2 = Failure rate (TJ = T2 )
EA = Vitalization Energy ( eV )
k = Boltzmann's constant (8.617×10-5eV/°K)
T = Junction temperature °K(°K = + 273)℃
R(t)=exp(-גt)
2112
11
TTk
Eexp A
LM80
Efficiency Rating and minimum values
Direct comparison between LED sources is now possible using LM80. As a result LED manufactures are now quoting minimum vales instead of typical values – This is delivering transparency in the market.
However comparison between lighting types and lighting fixtures is still a problem
UK building regulations in now place for lighting efficiency of 55 lm/W – not just for new build.
Refurbishment threshold covered have been lowered from 1000 M/sq to 100
More standards and legislation will be coming into legislation over the next 12 months possible including:
EPC – improvements to Energy Performance CertificatesHarmonisation of energy calculations and communicationCarbon creation calculation, offset and trading.EU ban on traditional incandescent lighting
Fluorescent
Incandescence
Metal H
alide
Compact Fluorescent
Halogen
LEDs
• Relative Lamp Size
46~95㏐ /WCRI 62~85Lifetime 12,000hrs 60~80㏐ /W
CRI 65Lifetime 9,000~12,000hrs 20~80㏐ /W
CRI 82Lifetime 10,000hrs 8~15㏐ /W
CRI 100Lifetime 1,000hrs
16~22㏐ /WCRI 100Lifetime 2,000hrs
60 - 120㏐ /WCRI 70~95Lifetime 50,000hrs
Efficiency Rating and minimum values
We are all used to seeing Energy rating on electrical goods.
Moves are now underway to classify lamps in a similar way.
This should include lifetime based on LM80 or similar calculation
Will allow a direct comparison between lighting sources and manufactures
Once implemented for lamps it is expected that it will be expanded out to non domestic lighting.
Efficiency Rating and minimum values
aaaaaaa
CRI
Colour temp
85
3000K
175
Lumens/Watt 65
45000 hours lifetime
6 sub-bins/ ANSI bin 3-Step McAdams
0.28 0.30 0.32 0.34 0.36 0.38 0.40 0.42 0.44 0.46 0.48 0.500.28
0.30
0.32
0.34
0.36
0.38
0.40
0.42
0.44
0.46
Z8Z6
Z4Z2
Z9Z7
Z5Z3
Z1
A8
A6A4
A2A0
A7
A5
C7C6
B7B6
C5C4
B5B4
C3
C2
B3B2
C1
C0
B1
B0
A9
A3
A1
B8
B9
C8
C9
D6
D4
D2
D0
D8
D7
D5
D3
D1
D9
E6
E4
E2
E0
E8
E7
E5
E3
E1
E9
F6
F4
F2
F0
F8
F7
F5
F3
F1
F9
G6
G4
G2
G0
H0G8
G7
G5
G1
G9
H6
H4
H2
H1
H8
E
H9
G3H3
H5
H7
7
6
5
4
3
W XV
TS
RQ
PO
NM
LK
J
HG
FE
2600K2700K
2900K3000K
3200K
3500K3700K
4000K
4200K
4500K4700K
5000K
5300K
5600K
6000K
6500K
7000K
7600K
8200K
X
Y
Energy Star
AB
CD
EF
G HCold White
Neutral White
Warm White
Various CRI solutions:
- Minimum CRI 70- Minimum CRI 80- Minimum CRI 90
Assessing light quality by bin indexing and CRI
The Colour rendering index (CRI), is a measure of the ability of a light source to reproduce the colours of various objects faithfully in comparison with an ideal or natural light source.
Light sources with a high CRI value have tradition-ally been desirable in colour critical applications such as photography and cinematography.
High CRI light sources are now been demanded for lighting applications especially for retail and con-sumer lighting.
Assessing light quality by bin indexing and CRI
- sunlight CRI 100 - LED CRI 60~95
Ra = average R1 to R8
Assessing light quality by bin indexing and CRI
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