Iec 62341 6 4 2017

It is recommen ed that the diameter of the integratin sphere is not les than 15 mm so that sp cimen of a re sona le size can b u ed.. When diameter of the integratin sphere is 150 mm an

IEC 62341 - 6- 4

Editio 1.0 2 17-0

Organic l ght emit t ing diode (OLED) displays –

Part 6- 4: Measuring met hods of t ransparent propert ies

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IEC 62341 - 6- 4

Edit io 1.0 2 17-0

Organic l ght emit t ing diode (OLED) displays –

Part 6- 4: Measuring met hods of t ransparent propert ies

FOREWORD 4

1 Sco e 6

2 Normative ref eren es 6

3 Terms an definition 6

4 Me s rin con ition 7

4.1 Stan ard me s rin en ironmental con ition 7

4.2 Stan ard l g tin con ition 7

4.2.1 Darkro m con ition 7

4.2.2 Ambient i umination con ition 7

4.2.3 Ambient i umination sp ctra 8

4 3 Stan ard setup con ition

8 4.3.1 Startin con ition of me s rements 8

4.3.2 Con ition of me s rin eq ipment 9

5 Me s rin method of tran p rent pro erties 10 5.1 Me s rin method of tran mis ion p rf orman e 1

0 5.1.1 Hemispherical tran mitan e factor with sp c lar in lu ed 10 5.1.2 Tran mit ed haze u der hemispherical i umination 12 5.1.3 Directional tran mit an e factor 14 5.1.4 Me s rement method of purity 16 5.1.5 Colour variation cau ed by a tran p rent display 19 5.2 Me s rin method of on-s re n p rf orman e in a darkro m 2

5.2.1 Luminan e an its u iformity 2

5.2.2 Chromaticity an colour non-u iformity 2

5.2.3 Darkro m contrast ratio 2

5.2.4 Grey s ale an gamma c aracteristic 2

5.2.5 Colour gamut 2

5.2.6 Directional o tical c aracteristic 2

6 Me s rin method of eflection pro erties 3

6.1 Hemispherical ref lectan e factor with sp c lar in lu ed 3

6.1.1 Purp se 3

6.1.2 Me s rin con ition 3

6.1.3 Me s rin method 3

6.2 Directional reflectan e factor 31

6.2.1 Purp se 31

6.2.2 Me s rin con ition 31

6.2.3 Me s rin method 31

7 Optical on-s re n p rf orman e u der ambient i umination 31

7.1 Ambient contrast ratio 31

7.1.1 Purp se 31

7.1.2 Me s rin con ition 3

7.1.3 Me s rin method 3

7.2 Display ambient colour me s rement 3

7.2.1 Purp se 3

7.2.2 Me s rin con ition 3

An ex A (normative) Alternative method for me s rin the hemispherical

tran mit an e factor of a tran p rent OLED display 3

A.1 Purp se 3

A.2 Me s rin con ition 3

A.3 Me s rin the tran mitan e 3

Biblogra h 3

Fig re 1 – L yout diagram of me s rement setup 9

Fig re 2 – Side view of me s rin con e t f or the hemispherical tran mit an e f actor me s rement with sp c lar in lu ed or ex lu ed 12 Fig re 3 – Sc ematic ar an ement of haze me s rement 14 Fig re 4 – Side view of me s rin con e t for the hemispherical tran mit an e f actor me s rement with sp c lar in lu ed or ex lu ed 16 Fig re 5 – Me s rin config ration for purity me s rement 18 Fig re 6 – Test p tern for purity me s rement 18 Fig re 7 – Test p tern for 4 % win ow luminan e 21

Fig re 8 – Example of luminan e lo din me s rement 2

Fig re 9 – Me s rement location 2

Fig re 10 – Me s rin p t ern for gamma me s rement 2

Fig re A.1 – Me s rement ge metry u in a sampl n sphere 3

Ta le 1 – Stan ard ambient con ition 8

Ta le 2 –Me s rin con ition of the p rts 14 Ta le 3 – Me s red example for purity 19 Ta le 4 – Workin example for colour variation in ex 2

Ta le 5 – Worked example for luminan e lo din 2

Ta le 6 – Example of luminan e non-u iformity 2

Ta le 7 – Example of colour u if ormity me s rement 2

Ta le 8 – Example of gamma me s rement 2

Ta le 9 – Referen e are s for the colour reprod ction ran e 2

Ta le 10 – Example of me s rement for the colour gamut variation ratio 2

Ta le 1 – Example of me s rement f or the directional electro-o tical c aracteristic 3

INTERNATIONAL ELECTROTECHNICAL COMMISSION

_

ORGA NIC LIGHT EMITTING DIODE (OLED) DISPLA YS –

Part 6-4: Measuring methods of transparent properties

1 Th Intern tio al Ele trote h ic l Commis io (IEC) is a worldwid org niz tio for sta d rdiz tio c mprisin

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International Stan ard IEC 6 3 1-6-4 has b en pre ared by IEC tec nical commite 1 0:

Electronic display devices

The text of this International Stan ard is b sed on the f ol owin doc ments:

Ful inf ormation on the votin for the a proval of this International Stan ard can b fou d in

the re ort on votin in icated in the a ove ta le

This doc ment has b en draf ted in ac ordan e with the ISO/IEC Directives, Part 2

A lst of al p rts in the IEC 6 3 1 series, publ s ed u der the general title Org nic l ight

The commite has decided that the contents of this doc ment wi remain u c an ed u ti the

sta i ty date in icated on the IEC we site u der "htp:/ we store.iec.c " in the data related to

A bi n ual version of this publcation may b is ued at a later date

IMPORTANT – The 'colour inside' logo on the cov r pa e of this publ c tion in ic te

that it contains colours whic are considere to be us f ul f or the cor e t

understa din of its conte ts Us rs s ould th ref ore print this doc me t using a

colour printer

ORGA NIC LIGHT EMITTING DIODE (OLED) DISPLA YS –

Part 6-4: Measuring methods of transparent properties

This p rt of IEC 6 3 1 sp cifies the stan ard me s rement con ition an me s rin

method for determinin the o tical p rf orman e of tran p rent pro erties of organic l g t

emit in diode (OLED) display p nels an mod les This doc ment in lu es the display

p rorman e u der darkro m con ition , an f ont an b c i umination

The fol owin doc ments are refer ed to in the text in s c a way that some or al of their

content con titutes req irements of this doc ment For dated referen es, only the edition

cited a ples For u dated ref eren es, the latest edition of the ref eren ed doc ment (in lu in

an amen ments) a pl es

IEC 6 3 1-1-2, Org nic li ht emitt ing d iod e (OLED) d ispla s – P art 1-2: Terminolo y a d

let ter symb ls

IEC 6 3 1-6-1, Org nic light emitting d iod e (OLED) d isplays – P art 6-1: Measurin methods

of optic l a d electro-o t ical p ramet ers

IEC 6 3 1-6-2, Org nic l ight emitt ing d iod e (OLED) d isplays – Part 6-2: Measurin methods

of visu l q a ty a d ambient p rorma c

ISO 9 41-3 7, Erg n mics ofh ma -system intera tion – Part 3 7: An lysis a d c mp a c

test methods for el ectro ic visu l d isplays

ISO 1 6 4-2, Col orimetry – P art 2: CIE stand ard il lumina ts

• IEC Electro edia: avai a le at ht p:/ www.electro edia.org/

• ISO Onl ne browsin platf orm: avai a le at htp:/ www.iso.org/o p

3.1

tra smit a c fa tor

ratio of the radiant or luminou flu tran mited in the direction delmited by the given sold

an le cone to that tran mit ed in the same direction an sold an le cone by a p rf ect

tran mit in dif fu er identical y ir adiated or i uminated

Note 1 to e try: Wh n th term tra smita c fa tor is u e in this d c me t, it refers to th p oto ic l

y-3.2

spe tral tra smit a c fa tor

ratio of the sp ctral radiant flu tran mit ed in the direction del mited by the given sol d an le

cone to that tran mit ed in the same direction by a p rf ect tran mit in dif fu er identical y

ir adiated

3.3

tra smit e haze

p rcentage of tran mited luminan e, p s ing throu h a sp cimen, whic deviates f om the

in ident l g t by no more than 0,0 4 rad (2,5°) by forward s at erin

3.4

purity

ratio of the luminan e me s red in the 0,2° region to the luminan e of the total tran mit ed

l g t

Note 1 to e try: Th p rity is d fin d a h w cle rly th s e-thro g ima e c uld b s e Th p rity is d riv d

f rom th me s reme t of distorte lg t d e to dif fra tio or ref ra tio

3.5

on-s re n performa c

o tical p rorman e that can b me s red on the tran p rent s re n when viewin an image

on the s re n

4 Measuring conditions

4.1 Sta dard me s ring e vironme tal condition

Me s rements s al b car ied out u der the stan ard en ironmental con ition :

Relative h midity: 2 % RH to 8 % RH

Atmospheric pres ure: 8 kPa to 10 kPa

When diff erent en ironmental con ition are u ed, they s al b noted in the me s rement

re ort

4.2 Sta dard l ghting conditions

4.2.1 Darkroom condition

The luminan e contribution f om the b c grou d i umination reflected of an /or tran mited

throu h the test display s al b les than 0,01 c /m

2

or 1/2 of the display’s blac state

luminan e, whic ever is lower If these con ition are not satis ed, then b c grou d

s btraction is req ired an it s al b noted in the re ort In ad ition, if the sen itivity of the

l g t me s rin device (LMD) is inadeq ate to me s re at these low levels, then the lower

l mit of the LMD s al b noted in the me s rement re ort

4.2.2 Ambie t i lumination conditions

Ambient l g tin con ition can make a large imp ct on the p r orman e of a tran p rent

display For o servers who wi watc a tran p rent display, variou ambient con ition s al

b s g ested b sed on previou rese rc Ta le 1 s ows the stan ard in o r an dayl g t

ambient i umination condition

Unif orm hemispherical diff use i umination wi b u ed to simulate the b c grou d l g tin in

a ro m or the hemispherical s yl g t in ident on the display, with s n oc lu ed The detai

inf ormation to simulate those ambient con ition is des rib d in IEC 6 3 1-6-2 an IDMS [1]

Me ium a s mbly a d d c rativ work, simple in p ctio ,

c u ters, lbrarie , (mo tly) e u atio al are s, c ntrol ro ms

Th d ylg t c ntra t ratio a d c lo r s al b c lc late

u in a c mbin tio of h mis h ric l dif fu e i umin tio (with

s e ular in lu e ) a d dire tio al i umin tio in id nt o a

dis la s ra e in a v rtic l orie tatio [8]9]

150 0 lx h mis h ric l

6 0 0 lx dire tio al at 4 °

4.2.3 Ambie t i lumination spe tra

The ambient p rf orman e of the display can b sig ificantly imp cted by the sp ctral

distribution of the i umination source Unles it is sp cified otherwise, the source i umination

s al closely a proximate CIE Il uminant D6 (se CIE 15) The source i umination u ed f or

me s rin the display ref lection an tran mis ion pro erties s al have a sp ctral y smo th

an bro db n emis ion Sp ctral reflection an tran mis ion me s rements can then b

u ed to predict the ambient display p r orman e f or an desired i umination sp ctra

When evaluatin the display’s ambient in o r p rf orman e, it is recommen ed to u e the

same sp ctral distribution for the hemispherical an directional source i umination Lig t

source sp ctra a proximatin CIE Iluminant A, Il uminant D5 , an Il uminant D6 are

recommen ed for in o r a pl cation For simulatin outdo r a pl cation , Il uminant D5 is

recommen ed f or the directional i umination, an Il uminant D7 is recommen ed f or

hemispherical i umination

4.3 Sta dard setup conditions

4.3.1 Starting conditions of me s reme ts

Stan ard setup con ition are given b low Me s rements s al b started af ter the

tran p rent OLED display an me s rin in truments ac ieve sta i ty Suff i ient warm-up

time has to b al owed for the tran parent OLED display p nels an mod les to re c a

_ _ _ _ _ _

luminan e sta i ty level of les than ± % over the entire me s rement f or a given display

image

4.3.2 Conditions of me s ring e uipme t

The general con ition of this me s rement s al b as f ol ows

1) The stan ard me s rement setup is s own in Fig re 1 The LMD s al b a luminan e

meter, colourimeter, or a sp ctroradiometer ca a le of me s rin sp ctral radian e over

at le st the 3 0 nm to 7 0 nm wavelen th ran e, with a maximum b n width of 10 nm for

smo th bro db n sp ctra F r l g t sources that have s arp sp ctral f eatures, lke LEDs

an f l ores ent lamps, the sp ctroradiometer’s maximum b n width s al b < 5 nm The

sp ctral b n width of the sp ctroradiometer s al b an integer multiple of the sampl n

interval For example, a 5 nm sampl n interval can b u ed f or a 5 nm or 10 nm

b n width Care s al b taken to en ure that the device has enou h sen itivity an

d namic ran e to p r orm the req ired tas

2) The lg t me s rin device s al b foc sed on the image plane of the tran p rent display

for on-s re n p rf orman e an on the image plane of the b c grou d for tran mis ion

p rorman e The LMD wi b al g ed p rp n ic larly to its s rf ace, u les stated

otherwise

3) The relative u certainty an re eata i ty of al the me s rin devices s al b maintained

by fol owin the in trument s p ler’s recommen ed cal bration s hed le

Figure 1 – La out dia ram of me s reme t s tup

4) The LMD integration time s al b an integer n mb r of fame p riod , s n hronized to

the f ame rate, or the integration time s al b gre ter than two h n red f ame p riod

5) When me s rin matrix display , the lg t me s rin devices s al b set to a

me s rement field that in lu es more than 5 0 pixels If smaler me s rement are s are

neces ary, eq ivalen e to 5 0 pixels s al b confirmed

6) The an ular a erture s al b les than or eq al to 5°, an me s rement field an le s al

b les than or eq al to 2° (se Fig re 1) The me s rin distan e an the me s remen

t-f ield an le may b adju ted to ac ieve a me s rement field gre ter than 5 0 pixels if

set in the a ove me s rement- ield an le is dif fic lt

7) Display mod les s al b o erated at their desig field f req en y When u in se arate

drivin sig al eq ipment to o erate a p nel, the drive con ition s al b noted in the

5 Measuring methods of transparent properties

5.1 Me s rin methods of tra smis ion perf orma c

5.1.1 Hemispheric l tra smit a c fa tor with spe ular inclu e

5.1.1.1 Purp s

The purp se of t his met hod is t o me s re t he tran mit ed l g t, in lu in the sp c lar comp nent,

throu h a tran p rent OLED display

5.1.1.2 Me s rin con itions

For this me s rement, the f ol owin con ition s al b a pl ed

a) Ap aratu :

1) l g t me s rin device that can me s re luminan e or sp ctral radian e;

2) drivin p wer source;

3) drivin sig al eq ipment;

4) integratin sphere with p rts an a sta i zed l g t source (se Fig re 2), whic s al

b as fol ows:

i) The l g t source in the integratin sphere s ould have a smo th bro db n

sp ctrum a proximatin CIE stan ard Il uminant D6 , as sp cif ied in ISO 1 6 4-2

The integratin sphere s ould have a photo ic o tical detector whic monitors the

relative luminan e level m in ide the sphere The monitor s al b f ited with

b ff les to prevent l g t f om the l g t source or the sample p rt f om f al n on it

directly The sp ctral c aracteristic of the l g t source s al b ke t con tant

d rin me s rements on a tran p rent OLED display The me s rement

con ition s al b s c that the tran p rent OLED display temp rature do s not

in re se whi e me s rements are made

i ) The integratin sphere may b of any diameter as long as the total p rt are do s

not ex e d 4,0 % of the internal are of the sphere It is recommen ed that the

diameter of the integratin sphere is not les than 15 mm so that sp cimen of a

re sona le size can b u ed When diameter of the integratin sphere is 150 mm

an the diameters of the sample, comp n ation an l g t tra p rts are 3 mm, the

ratio of the total p rt are to the internal are of the sphere is 3,0 % For sp c lar

in lu ed me s rements, a p rt plu or diff use white stan ard with simi ar

ref lectan e to the in er wal can b u ed to f il the p rt A sphere ge metry may

also b u ed in te d f or the config ration i u trated in Fig re 2 (se An ex A) If

the integratin sphere do s not have a comp n ation p rt, an placin the OLED

display at the sample p rt sig ificantly c an es the sp ctral distribution of the lg t

in the sphere, the alternate sphere method in An ex A s al b u ed In ad ition, if

it is neces ary to me s re the hemispherical tran mitan e f actor with the OLED

display on, then the alternate sphere method s al b u ed

i ) It is recommen ed to u e a sample p rt betwe n 3 mm to 7 mm If a

comp n ation p rt is u ed, the sample an comp n ation p rts of the integratin

sphere s al b circ lar an of the same size The comp n ation p rt s al b

p sitioned at an an le of les than 1,5 rad (9 °) fom the sample p rt The

sample p rt, comp n ation p rt an l g t tra p rt s al not l e on the gre t circle

of the sphere The p rts s al b desig ed in s c a way that samples placed at

the p rt wi l e at ne rly the same s race as the in er sphere wal

iv) The s r aces of the interior of the integratin sphere an the b f fles s al b of

s bstantial y eq al luminou ref lectan e whic s al b 9 % or more an s al not

vary by more than ±3 % The sphere wal reflectan e can b determined relative to

v) Usin this in trument, the re e ta i ty stan ard deviation s al b 0,2 % or les

The within-la oratory re rod cibi ty over lon time intervals s al not ex e d the

re e ta i ty by a f actor of more than 3

vi) The flat sample s al b held again t the sample p rt so that the normal of the

sample is within 2

o

of the normal of the sample p rt The sphere interior s ould

provide u if orm i umination on the s re n, with the s re n receivin a con tant

luminan e over its hemispherical in l nation an les This criterion is of ten satisfied

when the sphere’s internal l g t source dominates the i uminan e in ide the

sphere comp red to an sample contribution

vi ) The LMD is al g ed normal to the centre of the sample p rt at an a proximate

distan e of 0,5 m The me s rement field s al b foc sed on the sample p rt

plane

b) Stan ard me s rin en ironmental con ition :

1) darkro m con ition ;

2) stan ard setup con ition

5.1.1.3 Me s ring method

The method is simi ar to ASTM D10 3 [2] an analogou to ISO 13 6 -1 [3] This method

as umes that the tran mis ion pro erties of the tran p rent OLED display are not af fected by

the i umination level on the display

1) If the integratin sphere has a lg t tra p rt, place a p rt plu or diff use white stan ard at

the p rt Turn on the integratin sphere l g t source an al ow the lg t source an LMD to

sta i ze The me s rement con g ration in Fig re 2 s al b set up in a dark ro m, an

in res of external l g t into the integrating sphere s al b prevented

2) If the integratin sphere has a comp n ation p rt, place the b c side of the tran p rent

OLED display again t that p rt The display is turned of f

3) Me s re the luminan e L

ref

or sp ctral radian e at the sample p rt, an record the

monitor detector value m

ref

4) Place the b c side of the tran p rent OLED display again t the sample p rt If the

integratin sphere has a comp n ation p rt, place a lg t tra at that p rt Me s re the

tran mit ed luminan e (or sp ctral radian e) at the sample p rt L

di/0, an record the

monitor detector value m

di/0

5) Calc late the luminou hemispherical tran mit an e factor with sp c lar in lu ed T

di/0

u in Formula (1):

refdi/0

refdi/0

di/0

mm

LL

(1)

6) Re e t the re din s for L

ref, m

ref, L

di/0

di/0, makin ad itional re din s with the

sp cimen in p sition selected to determine u iformity

7) Car y out the proced re thre times, an u e the average of the thre calc lated res lts

as the luminou hemispherical tran mitan e f actor value

8) Al detai s are req ired to b recorded f or identif i ation of the test sp cimen an the

source of the sp cimen ( yp of l g t source u ed, information of tran p rent OLED

display)

If the tran mis ion pro erties of the tran p rent OLED display are diff erent in the of fom the

on state, then the alternate sphere method in An ex A s al b u ed

Fig re 2 – Side view of me s ring conc pt for the h mispheric l tra smit a c

f actor mea ureme t with spe ular in lude or e clu e

5.1.2 Tra smit e haze u der hemispheric l i lumination

5.1.2.1 Purp s

The purp se of this method is to me s re the amou t of haze tran mited to the viewer f om a

tran p rent OLED display b c -i uminated with hemispherical i umination

5.1.2.2 Me s rin conditions

For this me s rement, the fol owin con ition s al b a pled

a) Ap aratu :

1) l g t me s rin device that can me s re luminan e or sp ctral radian e;

2) drivin p wer source;

3) drivin sig al eq ipment;

4) integratin sphere with p rts an a sta i zed l g t source (se Fig re 2), whic s al

b as fol ows:

i) The lg t source in the integratin sphere s ould have a smo th bro db n

sp ctrum a proximatin CIE stan ard Iluminant D6 , as sp cif ied in ISO 1 6 4-2

The integratin sphere s ould have a photo ic o tical detector whic monitors the

relative luminan e level m in ide the sphere The monitor s al b f ited with

b f fles to prevent l g t f rom the l g t source or the sample p rt f rom fal n on it

directly The sp ctral c aracteristic of the l g t source s al b ke t con tant

d rin me s rements on a tran p rent OLED display The me s rement

con ition s al b s c that the tran p rent OLED display temp rature do s not

in re se whi e me s rements are made

i ) The total p rt are of the integratin sphere s ould not ex e d 4,0 % of the

internal are of the sphere It is recommen ed that the diameter of the integratin

sphere is not les than 15 mm so that sp cimen of a re sona le size can b

u ed When the diameter of the integratin sphere is 15 mm an the diameters of

the sample, comp n ation an lg t tra p rts are 3 mm, the ratio of the total p rt

are to the internal are of the sphere is 3,0 % If the integratin sphere do s not

have a comp n ation p rt, an placin the OLED display at the sample p rt do s

not sig if i antly c an e the sp ctral distribution of the l g t in the sphere, the

monitor detector s al b u ed to comp n ate for c an e in the sphere i uminan e

d e to the presen e of the display at the sample p rt

i ) A detai ed i u tration of the sp c lar ex lu ed an tran mited haze ge metry is

iv) The sample p rt and l g t tra p rt s al b centred on the same o tical axis as

the LMD The diameter of the sphere z , an the l g t tra p rt diameter d

the sphere, prod cin a me s rement f ield of diameter d

MD+z ) an d

pmf

is the projected me s rement f ield

diameter at the lg t tra p rt The LMD an sphere s al b set up s c that the

an ular ga (an ulu ) ξ = θ

LT/2 - arctan[d

pmf

2 z )] b twe n the projected

me s rement f ield diameter d

pmf

an the l g t tra p rt diameter s al give

ξ = 1,3° When the a ove req irements are satis ed, the maximum an le φ that

an me s red l g t ray can have relative to the normal is les than 3° En ure that

the LMD me s rement f ield is contained within the image of the l g t tra p rt are

b) Stan ard me s rin en ironmental con ition :

1) darkro m con ition ;

2) stan ard set-up con ition

5.1.2.3 Me s ring method

The method is simi ar to ASTM D10 3 [2] an analogou to ISO 14 8 [4]

NOT 1 This meth d a s me th t th tra smis io pro ertie of th tra s are t OLED dis la are n t af fe te

b th i umin tio le el o th dis la

NOT 2 This meth d als a s me th t th tra smis io pro ertie are in aria t to th re d re c lo r o th

dis la , a d alows th tra smis io pro ertie to b me s re withth dis la turn d of f

1) Place a p rt plu or diff use white stan ard at the l g t tra p rt Turn on the integratin

sphere l g t source an al ow the l g t source an LMD to sta i ze The me s rement

config ration in Fig re 2 s al b set up in a dark ro m, an in res of external l g t into

the integratin sphere s al b prevented

2) If the integratin sphere has a comp n ation p rt, place the b c side of the tran p rent

OLED display again t that p rt The display is turned of f

3) Alg the LMD normal to the sample p rt an f oc s the me s rement f ield at the centre of

the p rt Me s re the luminan e L

1

at the centre of the sample p rt, an record the

monitor detector value m

1

4) Place the b c side of the tran p rent OLED again t the sample p rt If the integratin

sphere has a comp n ation p rt, place a l g t tra at that p rt

5) Me s re the tran mited luminan e L

2

throu h the display at the centre of the sample p rt,

an record the monitor detector value m

2

6) Re lace the p rt plu or diff use white stan ard at the l g t tra p rt with a l g t tra If the

integratin sphere has a comp n ation p rt, place the p rt plu or the diff use white

stan ard at that p rt Me s re the tran mited luminan e L

4

throu h the display at the

centre of the sample p rt, an record the monitor detector value m

4

7) Remove the tran p rent OLED display fom the sample p rt Me s re the luminan e L

3

at

the centre of the sample p rt, an record the monitor detector value m

3

8) The luminou hemispherical tran mit an e f actor with sp c lar ex lu ed T

123

44

d / 0Q,

mLL

mLL

mL

Lm

T

11

(2)

where e c varia le is as ociated with the me s rement config ration l st in Ta le 2

9) The p rcent luminou hemispherical tran mit ed haze H is determined by:

LL

mm

H

31

42

10)Al detais are req ired to b recorded f or identif i ation of the test sp cimen an the

source of the sp cimen , s c as typ of lg t source u ed, inf ormation on tran p rent

OLED display

Figure 3 – Sc ematic ar a g me t of haze me s reme t

5.1.3 Dire tional tra smit a c fa tor

5.1.3.1 Purp s

The purp se of this met hod is t o me s re t he tran mitan e factor of a tran p rent OLED display

that is b c -i uminated with a directional l g t source

5.1.3.2 Me s rin con itions

For this me s rement, the f ol owin con ition s al b a pl ed

a) Ap aratu :

1) l g t me s rin device that can me s re luminan e or sp ctral radian e;

2) drivin p wer source;

3) drivin sig al eq ipment;

4) white reflectan e stan ard;

5) rin l g t with a sta i zed l g t source, whic s al b as folows:

i) Directional i umination s al b simulated by a rin l g t (Fig re 4) centred a out

the display normal A f ibre o tic rin l g t desig ed for a workin distan e that

recommen ed The i umination within the me s rin f ield are on the display s al

b u if orm < 5 %

i ) For the rin l g t, the source s ould have an emit er an ular s bten e of

a proximately 0,5° The rin l g t emit in plane s al b co-planar with the display

s race an centred a out the me s rement are The central cle r a erture of

the rin lg t s al b at le st 3 % larger than the eff ective a erture of the LMD

len

i ) The rin l g t source s ould have a smo th bro db n sp ctrum a proximatin

CIE stan ard Iluminant D6 , as sp cif ied in ISO 1 6 4-2 The sp ctral

c aracteristic of the l g t source s al b ke t con tant d rin me s rements on

a tran p rent OLED display The me s rement con ition s al b s c that the

tran p rent OLED display temp rature do s not in re se whie me s rements are

For this me s rement, the f ol owin method s al b a pled

NOT 1 This meth d a s me th t th s ater pro ertie of th tra s are t OLED dis la are in e e d nt of th

1) Place a white ref lectan e stan ard at the sample plane u ed f or the display

me s rements Unles the viewin distan e is sp cified, p sition the LMD a proximately

0,5 m f rom the sample plane an al g the o tical axis of the LMD centred an normal to

the reflectan e stan ard s rf ace Place the rin l g t facin the reflectan e stan ard,

centred on the o tical axis, an p sitioned at a distan e s c that its l g t is in ident at a

4 ° in l nation an le to the centre of the me s rement field

2) Alow the rin l g t source to sta i ze En ure that the LMD me s rement field is centred

within the u if orm i umination of the rin l g t i umination on the reflectan e stan ard

Me s re the luminan e L

std

or sp ctral radian e L

std(λ) of the lg t ref lected f rom the

reflectan e stan ard

3) Calc late the i uminan e E

dir(or sp ctral ir adian e E

dirλ) of the rin l g t at the sample

plane u in the k own luminou reflectan e f actor R

std(or sp ctral reflectan e factor

E

π

=

(4)

The calc lation of the sp ctral ir adian e has the same f orm

4) Re lace the ref lectan e stan ard with the tran p rent OLED display p sitioned at the

same sample plane, with the b c s rf ace normal of the display p ral el with the LMD

o tical axis The desired me s rement location on the display s al b centred a out the

me s rement f ield of the LMD

5) Move the LMD to the f ront of the tran p rent OLED display, maintainin the same

me s rement distan e, an al g the LMD to the same o tical axis an me s rement field

p sition as in the last me s rement A test p tern may b u ed to p sition the

me s rement f ield to the same location

6) With the display ren erin the desired colour Q, me s re the luminan e L

T,4 /0

or sp ctral

7) Turn of f the rin l g t source an me s re the darkro m emis ion f rom the display L

em

8) The luminou directional tran mit an e factor T

4 /0

E

LL

Figure 4 – Side view of me s ring conc pt for the hemispheric l tra smit a c

f actor me s reme t with spe ular in lude or e clu e

5.1.4 Me s reme t method of purity

2) referen e display device to display the test p tern b hin the tran p rent display;

3) driving p wer source;

For this me s rement, the fol owin method s al b a pl ed

1) Set a ref eren e display device to display the test p t ern as s own in Fig re 5 (a), an

al ow the a p ratu s ff i ient time to re c thermal eq i brium bef ore makin an

me s rements

2) Display the test p tern on the referen e display device an me s re the luminan e of al

the test p tern in Fig re 6 in seq en e at the centre of the s re n u in an LMD havin

a me s rement field of 0,2° The LMD me s rement field s ould b contained completely

IE C Dete tor

Dis la

Rin lg t

L

TL

std

White

sta d rd

me s rement f ield contain fewer than 5 0 display pixels, it s ould b confirmed that the

same luminan e can b o tained with more than 5 0 pixels

3) Calc late the purity referen e value u in F rmula (6), an c ec the val dity of the

me s rement u ing Formula (7) Unles Formula (7) is satis ed, adju t the al g ment of

setup an re e t the me s rement The 2 % in Formula (7) is the maximum luminan e

ac urac flu tuation of the LMD

ref

FK ,ref

FW ,

refFK,ref

CW ,

ref

LL

LL

FW ,

refCK,ref

FK,ref

CW ,ref

FW ,

LL

LL

LL

(7)

where

P

ref

is the ratio of the luminan e ran e with ful s re n p t ern to the p t ern of 0,2°

me s rement field restriction;

is the referen e luminan e of the blac 0,2° circle

4) The tran p rent OLED display s al b mou ted b twe n the me s rin in trument an

the ref eren e display device, an OLED display ex e t the circle sp cified in Fig re 5 (b)

s ould b covered so that l g t f rom ref eren e display p s throu h the circle only (se

Fig re 5(b)

5) With the test p t ern on the OLED display fixed, me s re the luminan e of al the

referen e display test p t ern in Fig re 6 throu h the tran p rent OLED display u in an

LMD havin a me s rement field of 0,2° The LMD s ould sti b foc sed on the

referen e display

6) Calc late the sample value u in Formula (8), an c ec the valdity of the me s rement

u in Formula (9) Unles Formula (9) is satisfied, adju t the al g ment of setup and

re e t the me s rement

sampleFK,sample

FW ,

sample

FK ,sample

CW ,

sample

LL

LL

CW ,sample

FW ,sample

LL

LL

LL

(9)

7) Calc late the purity of the tran p rent OLED display u in F rmula (10)

8) Re ort the res lts of me s rements as s own in the examples in Ta le 3

×

=

refsample

ur

PP

Table 3 – Me s re e ample for purity

1) sp ctroradiometer or eq ivalent lg t me s rin device that can me s re c romaticity

of tran p rent display device;

2) CIE Standard Il uminant A, or a ref eren e display device to display the test p t ern

b hin the tran p rent display

NOT This refere c dis la c n b u e f or e alu tio of c lo r v riatio ; drivin p wer s urc ; a d

drivin sig al e uipme t

b) Stan ard me s rin en ironmental con ition :

1) darkro m con ition;

2) stan ard setup con ition

5.1.5.3 Me s rin method

For this me s rement, the f olowin method s al b a pl ed

1) Set a CIE Stan ard Il uminant A or referen e display device If CIE Stan ard Il uminant A

is c osen as l g t source, me s re the CIE 19 1 c romaticity co rdinates (x, y) of the

i uminant an proce d f rom 10)

2) Turn on the ful s re n white an 4 % win ow sized sig al at a 10 % grey level

3) Me s re the CIE 19 1 c romaticity co rdinates W(x, y) at the centre of the s re n of the

ref eren e display

4) Turn on the ful s re n red an 4 % win ow sized red sig al

5) Me s re the CIE 19 1 c romaticity co rdinates R(x, y) at the centre of the s re n of the

referen e display

6) Turn on the ful s re n gre n an 4 % win ow sized gre n sig al

7) Me s re the CIE 19 1 c romaticity co rdinates G(x, y) at the centre of the s re n of the

ref eren e display

u

12234

v

12239

12)Me s re the c romaticity values f or white, red, gre n, an blue colour p t ern on the

same location with the tran p rent display

13)Calc late the colour variation with an without the tran p rent display f or white an

primary colours Formula (12) is u ed for this calc lation

2

ji2

ji

vvuuvu

14)Re ort the values f or the colour dif feren e f or e c test p t ern (white, red, gre n, an

blue) Ta le 4 s ows the example of the res lts

15)Variou colours can b selected an me s red for this me s rement method s c as the

Mu sel 2 colour referen e

Table 4 – Working e ample f or colour v riation ind x

With ut transparent

5.2 Me s ring methods of on-s re n perf orma c in a d rkroom

5.2.1 Lumina c a d its u iformity

b) Stan ard me s rin en ironmental con ition :

1) darkro m con ition ;

2) stan ard setup con ition

_ _ _ _ _ _

2

Th Mu s l Color s stem is a e ample of a s ita le pro u t a aia le c mmercialy This informatio is giv n