Evaluating LED lighting solutions

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1 Νοε 2013 (πριν από 3 χρόνια και 11 μήνες)

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Tony Oram, UK Sales Manager
-

Seoul Semiconductor

Evaluating LED lighting solutions

Who/Where are Seoul Semiconductor



3 corporate (Japan/Germany/USA)



25 sales offices



90 distributors

Seoul Semiconductor Europe GmbH

Seoul 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

Detroit

New Jersey

SET

Atlanta

Spain

Italy

Numberg

Pol and

Denmark

UK

Frankfurt

France

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,
h
igh
f
lux LED,
d
eep UV,
n
ear UV
,
Customized module

3) Broad Portfolio

2) Cost competitiveness

Volume production (3.5
b
illion
c
hips per
m
onth)

4) Worldwide production capabilities

Technology
c
enters and
f
actories in USA, Korea and China

1) Vertical integration
f
rom chip to package

EPI
g
rowing


FAB (
f
abrication)


PKG


C
ustom
m
odule
s

Who/Where are Seoul Semiconductor

LED Chips

Package

Module/

Light engine

Fixtures

SSC

Philips, Cree, Osram, Sharp
, …

Citizen, Everlight

Epistar

Focus
component level

S
SC 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 fixtures

From 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

Symbol

Value

Unit

Min

Typ

Max

Luminous Flux


V


80

100

120

lm

Luminous Intensity

I
V

1.0

1.5

2.0

Cd

* Luminous Flux (

V

)

-

Lumen [lm]

* Luminous Intensity (

V

)

-
Candela [Cd] (lm/sr)

Integrating Sphere

Buffer

Detector

LED

LED

Detector

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 not

available 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 Semiconductor

Cree

Osram

Philips

Nichea

Toyoda 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



Cross license

A/C LED lawsuit

Patents and Licensing






White LED Cross License

White and housing patent
cross
-
license agreement

Cross
-
l
icense

agreement

Strategic Cooperation

Patents and Licensing

+

UCSB in USA

And Others

+



Global Leading with over 5,500 patents

Material

Patent

Manufacturing/

Methodology

Patents

Design

Patent

Exclusive

License

Nonexclusive

License

Patents and Licensing

Testing standardisation by market leaders


LM80



Efficiency rating and Minimum values


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 change

Flux (light output) depreciation

Colour Shift

IF=100mA

where




R(t)=

LED

Operating

time

till

“t”


λ

=

Failure

rate


t

=

Lifetime



λ
1

=

Failure

rate

(TJ

=

T
1

)



λ
2

=


Failure

rate

(TJ

=

T
2

)



E
A

=

Vitalization

Energy

(

eV

)



k


=

Boltzmann's

constant

(
8
.
617
×
10
-
5
eV/
°
K)




T

=

Junction

temperature

°
K(
°
K

=



+

273
)

R(t)=exp(
-
ג
t)

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 Certificates

Harmonisation of energy calculations and communication

Carbon creation calculation, offset and trading.

EU ban on traditional incandescent lighting





Fluorescent

Incandescence

Metal Halide

Compact Fluorescent

Halogen

LEDs


Relative Lamp Size

46~95

/W

CRI 62~85

Lifetime 12,000hrs

60~80

/W

CRI 65

Lifetime 9,000~12,000hrs

20~80

/W

CRI 82

Lifetime 10,000hrs

8~15

/W

CRI 100

Lifetime 1,000hrs

16~22

/W

CRI 100

Lifetime 2,000hrs

60
-

120

/W

CRI
70
~
95

Lifetime
50
,
000
hrs

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



Binning



CRI (colour rendering index)




Assessing light quality by bin indexing and CRI

Assessing light quality by bin indexing and CRI

Assessing light quality by bin indexing and CRI



6
sub
-
bins
/ ANSI bin



3
-
Step䵣Adams

Energy Star

A

B

C

D

E

F

G

H

Cold 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 traditionally

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 consumer

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

Assessing light quality by bin indexing and CRI

Assessing light quality by bin indexing and CRI