IEC 61 747 20 3 Edition 1 0 201 6 02 INTERNATIONAL STANDARD Liquid crystal display devices – Part 20 3 Visual inspection – Active matrix colour l iquid crystal display modules IE C 6 1 7 4 7 2 0 3 2 0[.]
I EC 61 747-20-3 ® Ed i ti on 201 6-02 I N TERN ATI ON AL STAN DARD colour in sid e Li qu i d crystal di spl ay devi ces – I EC 61 747-20-3: 201 6-02(en ) Part 20-3: Vi su al i n specti on – Acti ve matri x col ou r l i qu i d crystal di spl ay modu l es Copyright International Electrotechnical Commission TH I S P U B L I C ATI O N I S C O P YRI G H T P RO TE C T E D C o p yri g h t © I E C , G e n e va , S w i tze rl a n d Al l or ri g h t s by re s e rv e d an y e i th e r m ean s, I EC c o p y ri g h t yo u r I EC 3, or or l o ca l IEC C e n t l ru e de CH -1 1 I E C's h a ve U n l ess o t h e rwi s e e l e c t ro n i c or m em ber an N a ti o n a l e n q u i ry m em ber s p e c i fi e d , m e ch a n i ca l , abou t N a ti o n a l no p a rt i n cl u d i n g C o m m i tte e o b ta i n i n g C o m m i tte e th e p u b l i ca ti o n c o u n t ry a d d i ti o n a l fo r O ffi c e in o f th i s p h o to co p yi n g fu rt h e r ri g h t s an d o f th e to th i s Te l : +41 22 91 02 1 F a x: +41 22 91 03 00 G e n e va i n fo @ i e c c h 20 be re p ro d u c e d re q u e s t e r If p u b l i ca ti o n , wi t h o u t yo u h a ve pl ease or u ti l i z e d p e rm i s s i o n an y co n ta c t in in q u e s ti o n s th e an y fo rm wri t i n g fro m abou t a d d re s s I EC bel ow or i n fo rm a t i o n V a re m b é S wi t z e rl a n d may m i c ro fi l m , ww w i e c c h Ab ou t th e I E C Th e I n t e rn a t i o n a l I n t e rn a t i o n a l E l e c t ro t e c h n i c a l S t a n d a rd s fo r al l Com m i ssi on e l e c t ri c a l , (I E C) e l e c t ro n i c and is th e re l a t e d l ead i n g g l obal o rg a n i z a t i o n th a t p re p a re s an d pu bl i sh es te ch n o l o g i e s Ab o u t I E C p u b l i c a ti o n s Th e te c h n i ca l l a te s t e d i ti o n , co n te n t a of IEC c o rri g e n d a p u b l i ca ti o n s or an is ke p t amend ment u n d er might co n s ta n t h a ve been I E C C atal og u e - webs tore i ec ch /catal og u e Th e s ta n d - a l o n e b i b l i o g p h i ca l Te ch n i ca l a p p l i ca ti o n i n fo rm a ti o n on S p e ci fi ca ti o n s , d o cu m e n ts Ava i l a b l e fo r fo r I EC PC, M ac th e I n te rn a ti o n a l An d ro i d e n ti re S ta n d a rd s , Re p o rts OS , an d o th e r Ta b l e ts an d i Pad a d va n ce d va ri e ty of s e a rch en abl es cri te ri a co m m i tte e , … ) an d th e Th e wo rl d ' s e l e ctri ca l wi th d wn It to ( re fe re n ce al so g i ve s fi n d I EC i n fo rm a ti o n on Pl ease m a ke s u re th a t yo u h a ve th e E n g l i sh an d l an g u ag es on l i n e co n ta i n i n g F re n ch , Al s o wi th kn o wn as d i cti o n a ry 20 000 e q u i va l e n t th e of te rm s e l e ctro n i c an d te rm s I n te rn a ti o n a l an d d e fi n i ti o n s in in a d d i ti o n a l E l e ctro te ch n i ca l on l i n e I E C G l os s ary - s td i ec ch /g l os s ary p u b l i ca ti o n s n u m b e r, I E C l ead i n g te rm s Vo ca b u l a ry ( I E V) I E C pu bl i cati on s s earch - www i ec ch /s earch pu b Th e by E l ectroped i a - www el ectroped i a org co n s u l ti n g Te ch n i ca l re v i e w pu bl i sh ed te xt, by a te ch n i ca l p ro j e cts , re p l a ce d 65 000 F re n ch I EC e l e ctro te ch n i ca l e xtra cte d p u b l i ca ti o n s co l l e cte d p u b l i ca ti o n s fro m fro m i ssu ed e a rl i e r te rm i n o l o g y th e Te rm s s i n ce 2002 p u b l i ca ti o n s e n tri e s an d S om e of in E n g l i sh D e fi n i ti o n s I EC e n tri e s TC 37, an d cl a u s e h a ve 77, of been 86 an d C I S P R I E C J u s t P u bl i s h ed - webs tore i ec ch /j u s u bl i s h ed S ta y up d e ta i l s al so to al l o n ce d a te n ew a on al l n ew p u b l i ca ti o n s m o n th by em l I EC p u b l i ca ti o n s re l e a s e d J u st Ava i l a b l e Pu bl i sh ed on l i n e an d I E C C u s to m er S ervi ce C en tre - web s tore i ec ch /cs c If yo u n eed wi s h fu rth e r C e n tre : Copyright International Electrotechnical Commission to g i ve us a s s i s ta n ce , cs c@ i e c ch yo u r fe e d b a ck pl ease co n ta ct on th e th i s p u b l i ca ti o n or C u s to m e r S e rvi ce I E C 61 747 -2 -3 ® Ed i ti on 201 6-02 I N TE RN ATI ON AL S TAN D ARD colour in sid e Li q u i d crystal d i spl ay d evi ces – Part 0-3: Vi su al i n specti on – Acti ve m atri x col ou r l i q u i d crystal d i spl ay m od u l es I N TERN ATI ON AL ELECTROTECH N I CAL COM M I SSI ON I CS 31 20 I SBN 978-2 -832 2-321 0-1 Warn i n g ! M ake s u re th at you obtai n ed th i s pu bl i cati on from an au th ori zed d i stri bu tor ® Reg i stered trad em ark of th e I n tern ati on al El ectrotech n i cal Com m i ssi on Copyright International Electrotechnical Commission – – I EC 61 74 7-2 -3 : 01 © IEC 201 C O N TE N TS F O RE WO RD I N TRO D U C TI O N S co p e N o rm a t i v e T e rm s , re fe re n c e s d e fi n i t i o n s and a b b re v i a t i o n s G e n e l 3 Ab b re v i a t i o n s 1 Vi s u a l i n s p e cti o n S t a n d a rd 1 m e th o d i n s p e c ti o n Vi s u a l E l e c t ri c a l S t a n d a rd co n d i ti o n s 1 i n s p e cti o n d ri v i n g i n s p e cti o n 2.1 S e tu p 2.2 I n s p e c to r a n d 2.3 I n s p e cti o n c ri t e ri a 1 Am b i e n t c o n d i t i o n s 1 4 an d C ri t e ri a co n d i ti o n s co n d i ti o n s m e th o d o f i n s p e c ti o n eq u i pmen t an d l im i t sampl e an d re c o rd liquid fo r v i s u a l c ry s t a l i n s p e cti o n d i spl ay mod u l es o f re s u l t B ri g h t s u b p i x e l d e fe c t s D a rk s u b p i x e l 3 I n t e rm e d i a t e 4 C l u s te r s u b p i xe l d e fe c t s s u b p i xe l B ri g h t l i n e D a rk l i n e S c t c h an d F o re i g n m a t e ri a l L i g h t l e a ka g e d e fe c t s d e fe c t s d e fe c t s d e fe c t s d e n t d e fe c t s and bu bbl e d e fe c t s d e fe c t s B i b l i o g p h y F i g u re – C l a s s i fi c a t i o n F i g u re – E xa m p l e s RG B o f d e fe c t s b y vi s u a l o f b ri g h t s u b p i x e l and i n s p e cti o n a d j a ce n t s u b p i xe l d e fe c t s in ca s e of an p ri m a ry c o l o u r d i s p l a y F i g u re – E xa m p l e s o f d a rk s u b p i x e l and a d j a ce n t s u b p i xe l d e fe c t s in ca s e o f RG B p ri m a ry c o l o u r d i s p l a y F i g u re – E xa m p l e s of mi n i mu m F i g u re – E xa m p l e F i g u re – Sh ape o f s c t c h F i g u re – Sh ape o f fo re i g n o f l i g h t l e a ka g e an d – C ri t e ri a fo r s c t c h Ta b l e – C ri t e ri a fo r fo re i g n b e twe e n b e twe e n th e s u b p i xe l to p ca s e d e fe c t s an d o u t e r b l a c k m a t ri x 1 d e n t d e fe c t s m a t e ri a l Ta b l e Copyright International Electrotechnical Commission d i s ta n ce an d an d bu bble d e fe c t s d e n t d e fe c t s m a t e ri a l an d bu bbl e d e fe c t s I E C 61 74 7-20 -3 : 01 © I E C 01 – – I N TE RN ATI O N AL E L E C TRO TE C H N I C AL C O M M I S S I O N LI QU I D C RYS TAL D I S P LAY D E VI C E S – P a rt -3 : Vi s u al i n s p e cti o n – Acti ve m a tri x co l o u r l i q u i d crys tal d i s p l a y m o d u l e s F O RE WO RD 1) T h e I n t e rn a ti o n a l E l e c tro te c h n i c a l C o m m i s s i o n ( I E C ) i s a wo rl d wi d e o rg a n i z a t i o n fo r s ta n d a rd i z a ti o n c o m p ri s i n g all n a ti o n a l e l e c tro te c h n i c a l c o m m i tte e s (I E C N a ti o n a l C o m m i t te e s ) Th e o b j e ct of IEC is to p ro m o te i n t e rn a ti o n a l c o - o p e ti o n o n a l l q u e s ti o n s c o n c e rn i n g s ta n d a rd i z a ti o n i n th e e l e c t ri c a l a n d e l e c t ro n i c fi e l d s T o th i s end an d Te ch n i ca l in a d d i ti o n R e p o rts , to o th e r a c ti v i ti e s , P u b l i cl y Av a i l a b l e IEC pu bl i sh es S p e c i fi c a t i o n s I n te rn a t i o n a l ( P AS ) and S ta n d a rd s , Gu i d es Te ch n i ca l ( h e re a fte r S p e c i fi c a ti o n s , re fe rre d to as “I EC P u b l i c a ti o n ( s ) ” ) T h e i r p re p a ti o n i s e n tru s te d t o te c h n i c a l co m m i tt e e s ; a n y I E C N a ti o n a l C o m m i tt e e i n te re s te d in th e s u b j e ct d eal t wi t h may p a rti c i p a t e in th i s p re p a to ry wo rk I n te rn a ti o n a l , g o v e rn m e n ta l o rg a n i z a t i o n s l i a i s i n g wi th th e I E C a l s o p a rti c i p a te i n t h i s p re p a ti o n wi t h th e I n t e rn a t i o n a l O rg a n i z a ti o n fo r S t a n d a rd i z a t i o n (I S O) in a c c o rd a n c e wi th g o v e rn m e n t a l and n on - I E C c o l l a b o t e s c l o s e l y co n d i ti o n s d e te rm i n e d by a g re e m e n t b e twe e n th e two o rg a n i z a ti o n s 2) T h e fo rm a l d e c i s i o n s o r a g re e m e n ts o f I E C o n te c h n i c a l m a tte rs e xp re s s , a s n e a rl y a s p o s s i b l e , a n i n te rn a ti o n a l co n s e n s u s of opi ni on on th e re l e v a n t s u b j e c ts s i n ce e a ch te ch n i ca l c o m m i tt e e h as re p re s e n t a ti o n fro m all i n te re s te d I E C N a ti o n a l C o m m i tt e e s 3) I E C P u b l i c a ti o n s h a v e th e fo rm C o m m i tte e s i n th a t s e n s e P u b l i c a ti o n s is a c c u te , o f re c o m m e n d a ti o n s fo r i n te rn a ti o n a l u se an d a re a c ce p te d b y I E C N a ti o n a l W h i l e a l l re a s o n a b l e e ffo rts a re m a d e to e n s u re t h a t th e te c h n i c a l c o n te n t o f I E C IEC can n o t be h el d re s p o n s i b l e fo r th e wa y in wh i c h th e y a re used or fo r an y m i s i n te rp re ta ti o n b y a n y e n d u s e r 4) In o rd e r to p ro m o te tra n s p a re n tl y to i n t e rn a ti o n a l th e m a xi m u m u n i fo rm i ty, e xte n t IEC possi bl e in N a ti o n a l th ei r C o m m i tte e s n a ti on a l and u n d e rta k e re g i o n a l to appl y IEC p u b l i c a ti o n s P u b l i c a ti o n s An y d i v e rg e n c e b e twe e n a n y I E C P u b l i c a t i o n a n d th e c o rre s p o n d i n g n a ti o n a l o r re g i o n a l p u b l i c a ti o n s h a l l b e c l e a rl y i n d i c a t e d i n th e l a tte r 5) I E C i ts e l f d o e s n o t p ro v i d e a n y a tte s ta ti o n o f c o n fo rm i ty a s s e s s m e n t s e rv i c e s a n d , i n s o m e a re a s , I n d e p e n d e n t c e rt i fi c a ti o n b o d i e s p ro v i d e co n fo rm i t y a c c e s s to I E C m a rks o f c o n fo rm i t y I E C i s n o t re s p o n s i b l e fo r a n y s e rv i c e s c a rri e d o u t b y i n d e p e n d e n t c e rti fi c a ti o n b o d i e s 6) Al l u s e rs s h o u l d e n s u re th a t th e y h a v e t h e l a t e s t e d i ti o n o f th i s p u b l i c a ti o n 7) N o l i a b i l i ty s h a l l a tt a c h to I E C o r i ts d i re c t o rs , e m p l o ye e s , s e rv a n ts o r a g e n t s i n c l u d i n g i n d i v i d u a l e xp e rts a n d m e m b e rs o f i ts te c h n i c a l c o m m i tt e e s a n d I E C N a ti o n a l C o m m i tte e s fo r a n y p e rs o n a l i n j u ry, p ro p e rty d a m a g e o r o th e r d a m a g e e xp e n s e s of an y a ri s i n g ou t n a tu re wh a ts o e v e r, wh e t h e r d i re c t of p u b l i c a ti o n , use th e o f, or o r i n d i re c t, re l i a n c e u pon, o r fo r c o s ts th i s I EC (i n cl u d i n g P u b l i c a ti o n or l eg al fe e s ) and an y o th e r IEC P u b l i c a ti o n s 8) Att e n t i o n i s d wn to t h e N o rm a ti v e re fe re n c e s ci t e d i n t h i s p u b l i c a ti o n U s e o f t h e re fe re n c e d p u b l i c a ti o n s i s i n d i s p e n s a b l e fo r th e c o rre c t a p p l i c a ti o n o f th i s p u b l i c a ti o n 9) Att e n ti o n i s d wn t o th e p o s s i b i l i ty t h a t s o m e o f t h e e l e m e n ts o f th i s I E C P u b l i c a ti o n m a y b e th e s u b j e c t o f p a t e n t ri g h ts I E C s h a l l n o t b e h e l d re s p o n s i b l e fo r i d e n ti fyi n g a n y o r a l l s u ch p a te n t ri g h ts I n te rn a ti o n a l S ta n d a rd I E C 7 - - h a s b e e n p re p a re d b y I E C te ch n i ca l co m m i tte e 1 : E l e c tro n i c d i s p l a y d e vi ce s Th i s fi rs t e d i ti o n ca n ce l s a n d re p l a ce s th e fi rs t e d i ti o n o f I E C 7 - - p u b l i s h e d i n 1 Th i s e d i ti o n co n s ti tu te s a te ch n i ca l re vi s i o n Th i s e d i ti o n i n cl u d e s th e fo l l o wi n g s i g n i fi ca n t te ch n i ca l ch a n g e s wi th re s p e ct to th e p re vi o u s e d i ti o n : a) d o cu m e n t n u m b e ri n g wa s ch a n g e d to a l i g n wi th th e n e w n u m b e ri n g o f I E C 7 Copyright International Electrotechnical Commission – – I E C 61 74 7-2 -3 : 01 © I E C 01 Th e te xt o f th i s s ta n d a rd i s b a s e d o n th e fo l l o wi n g d o cu m e n ts : FDI S R e p o rt o n vo ti n g 1 /7 /F D I S 1 /7 /R V D F u l l i n fo rm a ti o n o n th e vo ti n g fo r th e a p p ro va l o f th i s s ta n d a rd ca n b e fo u n d i n th e re p o rt o n vo ti n g i n d i ca te d i n th e a b o ve ta b l e Th i s p u b l i ca ti o n h a s b e e n d fte d i n a cco rd a n ce wi th th e I S O /I E C D i re cti ve s , P a rt A l i s t o f a l l p a rts o f th e I E C 7 s e ri e s , u n d e r th e g e n e l ti tl e Liquid crystal display devices , ca n b e fo u n d o n th e I E C we b s i te Th e co m m i tte e h a s d e ci d e d th a t th e co n te n ts o f th i s p u b l i ca ti o n wi l l re m a i n u n ch a n g e d u n ti l th e s ta b i l i ty d a te i n d i ca te d on th e I EC we b s i te u nd er " h ttp : //we b s to re i e c ch " in th e d a ta re l a te d to th e s p e ci fi c p u b l i ca ti o n At th i s d a te , th e p u b l i ca ti o n wi l l b e • re co n fi rm e d , • wi th d wn , • re p l a ce d b y a re vi s e d e d i ti o n , o r • d ed A b i l i n g u a l ve rs i o n o f th i s p u b l i ca ti o n m a y b e i s s u e d a t a l a te r d a te I M P O RT AN T th a t it – Th e c o n ta i n s u n d e rs t a n d i n g c o l o u r p ri n t e r Copyright International Electrotechnical Commission of 'col ou r i n s i d e' c o l o u rs i ts wh i ch c o n te n ts l og o a re U s e rs on th e c o ve r p a g e c o n s i d e re d shou l d to t h e re fo re of th i s be p u bl i cati on u s e fu l p ri n t th i s fo r i n d i c a te s th e d o cu m e n t c o rre c t using a I E C 61 74 7-20 -3 : 01 © I E C 01 – – I N TRO D U C TI O N Th i s p a rt o f I E C 7 fa ci l i ta te s th e vi s u a l i n s p e cti o n o f th e i m a g e d e fe ct o f L C D m o d u l e s b y h u m a n e ye s s u b j e cti ve l y Vi s u a l i n s p e cti o n i s p e rfo rm e d a t s p e ci fi e d co n d i ti o n s a n d cri te ri a Th e o b j e cti ve m e a s u re m e n t m e th o d o f vi s u a l i m a g e d e fe cts wi th a n i n s tru m e n t wi l l b e s tu d i e d a n d s ta n d a rd i z e d Copyright International Electrotechnical Commission – – I E C 61 74 7-2 -3 : 01 © I E C 01 L I Q U I D C RYS T AL D I S P L AY D E VI C E S – P a rt - : Vi s u a l liquid i n s p e c t i o n – Ac t i v e m a t ri x c o l o u r c ry s t a l d i spl ay m od u l es Scope Th i s p a rt o f I E C 7 g i ve s th e d e ta i l s o f th e q u a l i ty a s s e s s m e n t p ro ce d u re s a n d p ro vi d e s g e n e l ru l e s fo r vi s u a l i n s p e cti o n o f th e a cti ve a re a o f tra n s m i s s i ve typ e a cti ve m a tri x co l o u r l i q u i d crys ta l d i s p l a y m o d u l e s b y th e h u m a n e ye F u rth e rm o re , th i s s ta n d a rd i n cl u d e s d e fe ct d e fi n i ti o n s a n d th e m e th o d fo r vi s u a l d e fe ct i n s p e cti o n N O TE M u i s e xc l u d e d fro m th i s s t a n d a rd b e c a u s e i t wa s n o t c l e a rl y s p e c i fi e d a t th e ti m e t h i s s t a n d a rd wa s d e vel op ed N O TE R e s tri ct i o n s on d e fe c t typ e s , n u m b e r, and si zes a re s p e ci fi e d in th e q u a l i ty c o n t c t ( c u s to m e r a c c e p t a n c e s p e c i fi c a ti o n a n d i n c o m i n g i n s p e c ti o n s p e c i fi ca ti o n ) N o rm a t i v e re fe re n c e s Th e fo l l o wi n g d o cu m e n ts , i n wh o l e o r i n p a rt, a re n o rm a ti ve l y re fe re n ce d i n th i s d o cu m e n t a n d a re i n d i s p e n s a b l e fo r i ts a p p l i ca ti o n F o r d a te d re fe re n ce s , o n l y th e e d i ti o n ci te d a p p l i e s F o r u n d a te d re fe re n ce s , th e l a te s t e d i ti o n of th e re fe re n ce d d o cu m e n t ( i n cl u d i n g an y a m e n d m e n ts ) a p p l i e s I E C 61 74 7-1 -2 : 01 , L iq uid a n d m e ch a n ica l te s t m e th o ds T e rm s , crys ta l – d e fi n i t i o n s a n d dis p la y de vice s – Pa rt 0-2 : En viro n m e n ta l, e n dura n ce En viro n m e n ta l a n d e n dura n ce a b b re v i a t i o n s F o r th e p u rp o s e s o f th i s d o cu m e n t, th e fo l l o wi n g te rm s , d e fi n i ti o n s a n d a b b re vi a ti o n s a p p l y G e n e l vi s u a l i n s p e cti o n m e th o d o f ch e cki n g d i s p l a y d e fe cts wi th th e h u m a n e ye N o te to e n try: T h e l i m i ta t i o n o n d i s p l a y d e fe ct s d e p e n d s o n s u p p l i e r a n d c u s t o m e r Th e re fo re a l i m i t s a m p l e , wi th we l l - d e fi n e d o b s e rv a ti o n a n d o p e t i o n a l c o n d i ti o n s , c a n b e u s e d a s a re fe re n c e fo r th e d e fe c t l e v e l d e fe c t a n y o b s e rva b l e a b n o rm a l p h e n o m e n o n a p p e a ri n g i n th e a cti ve d i s p l a y a re a E X AM P L E d e fe c ts wi t h F i g u re s h o ws a a c l e a r b o u n d a ry, l a tte r c a te g o ry is n ot ye t we l l c l a s s i fi c a ti o n an d d e fi n e d , and c a te g o ry a re e xc l u d e d fro m th i s s ta n d a rd Copyright International Electrotechnical Commission of th e s e c o n d d e fe c ts i n to two c a t e g o ri e s c a t e g o ry i s c l a s s i fi e d h e n ce d i ffi c u l t to Th e fi rs t a s d e fe c t s wi t h eva l u a te F o r th i s c a t e g o ry an re a s o n , is cl a s s i fi e d u n c l e a r b o u n d a ry d e fe c ts in th e as Th e s e d IEC 61 747-20-3:201 © IEC 201 –7– small Bright Clear bou ndary Su bpixel defect Single I ntermediate Dark Plural Adjacent bright Point defect Adjacent dark Foreign material Bubble Line defect Scratch & dent d efect Defect U nclear boundary F i g u re large Mura – C l a s s i fi c a t i o n IEC o f d e fe c t s b y v i s u a l i n s p e c t i o n 2.1 s u b p i xe l d e fe c t defect in the smallest pixel element when it appears in a state different from the intended one EXAMPLE Bright subpixels appear on a d ark pattern, and d ark su bpixels appear on a bright pattern 2.2 b ri g h t s u b p i x e l d e fe c t defect which appears bright on the screen when a dark pattern is displayed EXAMPLE Figure a) shows a single subpixel bright defect of red, green, and blue respectively Figure b) shows two ad jacent bright su bpixel d efects connected or disconnected in a horizontal and/or vertical one-pixel area Figure c) shows three adjacent bright subpixel defects connected in three horizontal and/or vertical subpixel areas Copyright International Electrotechnical Commission – – R I E C 61 74 7-2 -3 : 01 © I E C 01 B G IEC F i g u re a ) – E x a m p l e s o f o n e b ri g h t s u b p i x e l d e fe c t BR G B G B B R G G R B IEC F i g u re b ) – E x a m p l e s o f two a d j a c e n t b ri g h t s u b p i x e l d e fe c t s GB R G B B R GB B G GB R B IEC F i g u re c ) – E x a m p l e s o f t h re e a d j a c e n t b ri g h t s u b p i x e l d e fe c t s F i g u re – E xa m p l e s o f b ri g h t s u b p i xe l a n d a d j a c e n t s u b p i xe l d e fe c ts i n c a s e o f a n RG B p ri m a ry c o l o u r d i s p l a y 3.2.3 d a rk s u b p i xe l d e fe c t d e fe ct wh i ch a p p e a rs d a rk o n th e s cre e n wh e n a b ri g h t p a tte rn i s d i s p l a ye d E X AM P L E F i g u re a ) s h o ws a s i n g l e s u b p i xe l d e fe c t o f th e d a rk - typ e o f re d , g re e n , b l u e , re s p e c ti v e l y F i g u re b ) s h o ws two a d j a c e n t d a rk s u b p i xe l d e fe c ts c o n n e c te d o r d i s c o n n e c t e d i n a h o ri z o n t a l a n d /o r v e rti c a l o n e - p i xe l a re a F i g u re c ) s h o ws th re e a d j a c e n t d a rk s u b p i xe l d e fe c ts c o n n e c t e d i n th re e h o ri z o n ta l a n d /o r v e rti c a l s u b p i xe l a re a s Copyright International Electrotechnical Commission I E C 61 74 7-20 -3 : 01 © I E C 01 RGB – – GB RG RGB RG RGB IEC F i g u re a ) – O n e d a rk s u b p i x e l d e fe c t RG GB R B GB RG RGB R B R GB RG RGB RG RG R R B RGB RGB R GB B GB IEC F i g u re b ) – T w o a d j a c e n t d a rk s u b p i xe l d e fe c t s GB R R RGB R B RGB R RG RGB RGB RG RGB GB RG RGB RG GB RGB R B RGB R GB RGB IEC F i g u re c ) – T h re e a d j a c e n t d a rk s u b p i xe l d e fe c t s F i g u re – E xa m p l e s o f d a rk s u b p i xe l a n d a d j a c e n t s u b p i xe l d e fe c t s i n c a s e o f RG B p ri m a ry c o l o u r d i s p l a y 2.4 i n te rm e d i a te s u b p i xe l d e fe c t d e fe ct wh i ch a p p e a rs wi th a n i n te rm e d i a te l u m i n a n ce l e ve l o n th e s cre e n wh e n a b ri g h t o r d a rk p a tte rn i s d i s p l a ye d 3.2.5 c l u s te r s u b p i xe l d e fe c t a t l e a s t two s u b p i xe l d e fe cts in a s p e ci fi e d a re a o r wi th i n a s p e ci fi e d d i s ta n ce wi th man y s u b p i xe l d e fe cts E X AM P L E F i g u re a ) a n d F i g u re b ) s h o w a n e xa m p l e o f b ri g h t a n d d a rk c l u s te r s u b p i xe l d e fe c ts i n wh i c h t h e m i n i m u m d i s t a n c e b e twe e n th e d e fe c ts i s s p e c i fi e d “ Copyright International Electrotechnical Commission d h ” and “ d v ” s ta n d fo r h o ri z o n ta l a n d v e rti ca l m i n i m u m d i s ta n c e h I E C 61 74 7-2 -3 : 01 © I E C 01 < m i n i m u m d i stan ce d > m i n i m u m d i s ta n c e d h < m i n i m u m d i s ta n c e Fail d d v Pass v > m i n i m u m d i stan ce – 10 – IEC < m i n i m u m d i stan ce h > m i n i m u m d i s ta n c e Pass d h < m i n i m u m d i s ta n c e Fail v d d d v > mi n i mu m d i stan ce F i g u re a ) – B ri g h t s u b p i x e l d e fe c t t o b ri g h t s u b p i x e l d e fe c t IEC F i g u re b ) – D a rk s u b p i x e l d e fe c t t o d a rk s u b p i x e l d e fe c t F i g u re – E xa m p l e s o f m i n i m u m d i s ta n c e b e twe e n s u b p i xe l d e fe c t s 2.6 l i n e d e fe c t ve rti ca l o r h o ri z o n ta l line wh i ch a p p e a rs in th e b ri g h t o r d a rk s ta te wh e n a d a rk o r b ri g h t p a tte rn i s d i s p l a ye d 3.2.7 b ri g h t l i n e d e fe c t l i n e th a t a p p e a rs b ri g h t o n th e s cre e n wh e n a d a rk p a tte rn i s d i s p l a ye d 3.2.8 d a rk l i n e d e fe c t l i n e th a t a p p e a rs d a rk o n th e s cre e n wh e n a b ri g h t p a tte rn i s d i s p l a ye d 2.9 s c tc h a n d d e n t d e fe c t d e fe ct o n to p o f o r u n d e rn e a th th e p o l a ri z e r o r o th e r o p ti ca l co m p o n e n ts i n th e a cti ve d i s p l a y a re a 3.2.1 s c tc h d e fe c t l i g h t ( wh i te ) l i n e th a t ca n b e s e e n o ve r a d a rke r b a ckg ro u n d a n d d o e s n o t va ry i n s i z e 3.2.1 d e n t d e fe ct l i g h t ( wh i te ) s p o t th a t ca n b e s e e n o ve r a d a rke r b a ckg ro u n d a n d d o e s n o t va ry i n s i z e 2.1 fo re i g n m a te ri a l d e fe c t d e fe ct th a t i s l o ca te d b e twe e n th e p a n e l a n d b a ckl i g h t u n i t Copyright International Electrotechnical Commission I E C 61 74 7-20 -3 : 01 © I E C 01 – 11 – 2.1 b u b b l e d e fe c t d e fe ct th a t i s ca u s e d by a ca vi ty o r g a s in th e liquid crys ta l m a te ri a l in th e p a s te o f th e p o l a ri z e r/re fl e cto r 2.1 l i g h t l e a ka g e d e fe ct l i g h t th a t i s vi s i b l e b e twe e n th e to p ca s e ( ch a s s i s ) a n d o u te r b l a ck m a tri x i n a b e z e l o p e n a re a E X AM P L E F i g u re s h o ws a n e xa m p l e o f a l i g h t l e a k a g e d e fe c t B ezel O u te r b l a ck m a tri x Acti ve a re a L i g h t l e a ka g e IEC F i g u re – E xa m p l e o f l i g h t l e a ka g e b e twe e n th e to p c a s e a n d o u te r b l a ck m a tri x 3.2.1 m u n o n -u n i fo rm i ty vi s u a l i m p e rfe cti o n i n l u m i n a n ce o r ch ro m a ti ci ty [S O U RC E : I E C 7 - - : , ] 3.3 Ab b re vi a ti o n s DU T d e vi ce u n d e r te s t Vi s u a l i n s p e c ti o n m e th o d a n d cri te ri a S ta n d a rd i n s p e cti o n co n d i ti o n s Am b i e n t co n d i ti o n s Te m p e tu re a n d h u m i d i ty Al l vi s u a l i n s p e cti o n s h a l l b e ca rri e d o u t a t th e te m p e tu re s p e ci fi e d i n I E C 7 - - : , Clau se Al l vi s u a l i n s p e cti o n s h a l l b e ca rri e d o u t a t th e h u m i d i ty s p e ci fi e d in I E C 74 7-1 0-2 : 01 4, Clau se 4 I l l u m i n a n ce Al l vi s u a l i n s p e cti o n s h a l l b e ca rri e d o u t a t th e i l l u m i n a ti o n l e ve l s a s s p e ci fi e d i n th e d e ta i l s p e ci fi ca ti o n Th e i l l u m i n a ti o n a ccu te vi s u a l i n s p e cti o n Copyright International Electrotechnical Commission l e ve l sh al l be a d j u s te d in s u ch a wa y th a t it a l l o ws fo r a n – 12 – Vi s u a l Th e i n s p e cti o n Vi e w i n g i n s p e cti o n I E C 61 74 7-2 -3 : 01 © I E C 01 c o n d i ti o n s a n g l e n g e sh al l be co n d u cte d wi th i n th e s p e ci fi e d vi e wi n g ang l e n g e o f th e liquid crys ta l d i s p l a y m o d u l e s Vi e w i n g d i s ta n c e Th e d i s ta n ce b e twe e n th e D U T a n d th e i n s p e cto r’ s e ye s s h o u l d b e s e t a t o p ti m u m d i s ta n ce Th e o p ti m u m d i s ta n ce d e p e n d s o n p i xe l s i z e , d i s p l a y s i z e , a p p l i ca ti o n typ e , a n d d e fe ct s i z e E l e c t ri c a l d ri vi n g c o n d i ti o n s D ri v i n g s u p p l y vo l t a g e o r c u rre n t o f D U T Th e s p e ci fi e d vo l ta g e a n d /o r cu rre n t s h a l l b e s u p p l i e d to th e D U T T e s t p a t t e rn Te s t p a tte rn s s h a l l b e s p e ci fi e d i n th e d e ta i l s p e ci fi ca ti o n F o r e xa m p l e , th e te s t p a tte rn s fo r vi s u a l i n s p e cti o n a re th e fu l l s te r o f wh i te , b l a ck, g re y a n d a l l p ri m a ry co l o u r p a tte rn s u n d e r th e s p e ci fi e d l u m i n a n ce n g e S t a n d a rd Th e i n s p e cti o n m e th o d S e tu p o f i n s p e cti o n DU T ve rti ca l wi l l be vi e wi n g i n s ta l l e d d i re cti o n eq u i pm en t an d on a n g e ro ta ta b l e liquid fi xtu re Al te rn a ti ve l y, c ry s t a l d i s p l a y m o d u l e s to en abl e ch a n g e s in th e th e i n s p e cto r m o ve s a ro u n d h o ri z o n ta l an d an d th e D U T i s fi xe d Tu rn o n th e d i re ct cu rre n t p o we r s u p p l y a n d p a tte rn g e n e to r a n d wa rm u p fo r s ta b i l i z a ti o n S u p p l y th e d ri vi n g vo l ta g e a n d p a tte rn to th e D U T Th e wa rm - u p ti m e o f th e D U T s h a l l b e s u ffi ci e n tl y l o n g to o b ta i n a s ta b l e s i g n a l , n e ce s s a ry fo r th e vi s u a l i n s p e cti o n Th e I n s p e ctor an d i n s p e cto r shall p e ri o d i ca l l y tra i n e d l i m i t s a m p l e fo r vi s u a l h a ve wi th ( co rre cte d - to ) s p e ci fi e d i n s p e cti o n n o rm a l l i m i t sam pl es vi s i o n , in n o rm a l o rd e r to co l o u r vi s i o n and sh al l a ccu te l y ca rry o u t th e be vi s u a l e xa m i n a ti o n Th e I n s p e cti o n i n s p e cto r s h a l l an d re c o rd o f re s u l t ca rry o u t th e vi s u a l i n s p e cti o n based on th e s p e ci fi e d re co rd th e re s u l t o n re co rd i n g s h e e ts wi th th e s p e ci fi e d i n s p e cti o n co n d i ti o n s C ri t e ri a B ri g h t s u b p i x e l d e fe c t s Th e m a xi m u m n u m b e r o f b ri g h t d e fe cts s h a l l b e s p e ci fi e d i n th e s p e ci fi ca ti o n – O n e s u b p i xe l : To b e s p e ci fi e d i n th e d e ta i l s p e c i fi ca ti o n – Ad j a ce n t s u b p i xe l s : To b e s p e ci fi e d i n th e d e ta i l s p e ci fi ca ti o n – To ta l a m o u n t o f b ri g h t s u b p i xe l s : To b e s p e ci fi e d i n th e d e ta i l s p e ci fi ca ti o n D a rk s u b p i x e l d e fe c t s Th e m a xi m u m n u m b e r o f d a rk d e fe cts s h a l l b e s p e ci fi e d i n th e s p e ci fi ca ti o n Copyright International Electrotechnical Commission p ro ce d u re and I E C 61 74 7-20 -3 : 01 © I E C 01 – 13 – – O n e s u b p i xe l : To b e s p e ci fi e d i n th e d e ta i l s p e ci fi ca ti o n – Ad j a ce n t s u b p i xe l s : To b e s p e ci fi e d i n th e d e ta i l s p e ci fi ca ti o n – T o ta l a m o u n t o f d a rk s u b p i xe l s : T o b e s p e ci fi e d i n th e d e ta i l s p e ci fi ca ti o n I n t e rm e d i a t e s u b p i x e l d e fe c t s Th e m a xi m u m n u m b e r o f i n te rm e d i a te d e fe cts s h a l l b e s p e ci fi e d i n th e s p e ci fi ca ti o n – O n e s u b p i xe l : To b e s p e ci fi e d i n th e d e ta i l s p e ci fi ca ti o n – Ad j a ce n t s u b p i xe l s : To b e s p e ci fi e d i n th e d e ta i l s p e ci fi ca ti o n – T o ta l a m o u n t o f s u b p i xe l s : To b e s p e ci fi e d i n th e d e ta i l s p e ci fi ca ti o n C l u s te r s u b p i xe l d e fe c t s Th e m a xi m u m n u m b e r o f cl u s te r d e fe cts s h a l l b e s p e ci fi e d i n s p e ci fi ca ti o n Th e minimum d i s ta n ce b e twe e n s u b p i xe l d e fe cts ( d v an d d h , see F i g u re 4) sh al l al so be s p e ci fi e d – C l u s te r s u b p i xe l s : To b e s p e ci fi e d i n th e d e ta i l s p e ci fi ca ti o n B ri g h t l i n e d e fe c t s Al l typ e s o f b ri g h t l i n e d e fe cts s u ch a s ve rti ca l , h o ri z o n ta l o r cro s s a re n o t a l l o we d D a rk l i n e d e fe c t s Al l typ e s o f d a rk l i n e d e fe cts s u ch a s ve rti ca l , h o ri z o n ta l o r cro s s a re n o t a l l o we d S c t c h an d d e n t d e fe c t s Th e cri te ri a fo r s cra tch a n d d e n t d e fe cts a re p ro vi d e d i n Ta b l e a n d F i g u re Th e s ym b o l o f “ a ” an d “ b ” i n d i ca te s th e m aj or a xi s an d mi nor a xi s of th e p o l a ri z e r d e fe ct E xtra n e o u s s u b s ta n ce s wh i ch ca n b e wi p e d o u t, s u ch a s fi n g e rp ri n ts o r p a rti cl e s , a re n o t co n s i d e re d a d e fe ct S cra tch e s a n d d e n ts l o ca te d o n th e b l a ck m a tri x ( o u ts i d e o f th e a cti ve a re a ) a re n o t co n s i d e re d d e fe cts Tab l e – C ri t e ri a fo r s c t c h an d I te m d e n t d e fe c t s C ri t e ri a a> b Li n ear ( D e n ts C i rc u l a r ( Minimum ) a≤ b ≤ wi d th [ m m ] ( n u m b e r o f d e fe c ts ) ) ≤ ≤ m a xi m u m , m i n i m u m ≤ a v e g e d i a m e te r, ≤ m a xi m u m Minimum d e fe c ts ) ≤ l e n g th [m m ] ≤ m a xi m u m , ≤ m a xi m u m , N m a xi m u m ( a + b ) /2 [ m m ] N (n u m ber of b S c tc h e s a IEC F i g u re – S h a p e o f s c t c h F o re i g n m a t e ri a l an d an d d e n t d e fe c t s b u b b l e d e fe c t s T h e cri te ri a fo r fo re i g n m a te ri a l s u ch a s d u s t, th re a d , e tc, l o ca te d i n s i d e th e D U T , a n d b u b b l e s s u ch a s a i r, g a s , e tc , a re p ro vi d e d i n Ta b l e a n d F i g u re Copyright International Electrotechnical Commission – 14 – T a b l e – C ri t e ri a fo r fo re i g n m a t e ri a l a n d I te m F o re i g n m a te ri a l b u b b l e d e fe c t s C ri t e ri a N N ( n u m b e r o f d e fe c t s ) : m a xi m u m s i z e o f d e fe c ts < max [ ( n u m b e r o f d e fe c t s ) : m a xi m u m s i z e o f d e fe c ts < max [ a b a b , ] , ] b B u bbl es I E C 61 74 7-2 -3 : 01 © I E C 01 a I EC F i g u re – S h a p e o f fo re i g n m a t e ri a l a n d b u b b l e d e fe c t s L i g h t l e a k a g e d e fe c t s Th e re s h a l l b e n o vi s i b l e l i g h t fro m th e b a ckl i g h t u n i t a ro u n d th e e d g e s o f th e s cre e n Copyright International Electrotechnical Commission I EC 61 74 7-20 -3 : 01 © I EC 201 – – B i b l i o g p h y I EC 61 74 7-1 -2 : , Liquid crystal display devices – Part -2: Generic – Terminology and letter symbols 7 - - , Liquid crystal display devices – Part 20-1 : Visual inspection – Monochrome liquid crystal display cells (excluding all active matrix liquid crystal display cells) I EC I E C 7 - - , Liquid crystal display devices – Part 20-2: Visual inspection – Monochrome matrix liquid crystal display modules (excluding all active matrix liquid crystal display modules) 61 74 7-30 -1 , Liquid crystal display devices – Part 30-1 : Measuring methods for liquid crystal display modules – Transmissive type I EC I S O - , Ergonomics of human-system interaction- Part 307: A nalysis and compliance test methods for electronic visual displays _ Copyright International Electrotechnical Commission Copyright International Electrotechnical Commission Copyright International Electrotechnical Commission INTERNATIONAL ELECTROTECHNICAL COMMISSION 3, rue de Varembé PO Box 31 CH-1 21 Geneva 20 Switzerland Tel: + 41 22 91 02 1 Fax: + 41 22 91 03 00 info@iec.ch www.iec.ch Copyright International Electrotechnical Commission