Iec 61747 20 1 2015

IEC 61 747 20 1 Edition 1 0 201 5 02 INTERNATIONAL STANDARD Liquid crystal display devices – Part 20 1 Visual inspection – Monochrome l iquid crystal display cells (excluding all active matrix l iquid[.]

IEC 61 747- 20- 1

Editio 1.0 2 15-0

Liquid cryst al display devices –

Part 20-1: Visual inspect ion – Monochrome l quid cryst al display cel s

(ex cluding al act ive mat rix l quid cryst al display cel s)

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IEC 61 747- 20- 1

Edit io 1.0 2 15-0

Liquid cryst al display devices –

Part 20-1: V isual inspect ion – Monochrome l quid cryst al display cel s

(excluding al act ive mat rix l quid cryst al display cel s)

INT ER NAT IONAL

ELECT R OT ECHNICAL

®

W arnin ! Mak e s re th t you o tain d this publ c t ion from a a thorize dist ribut or

FOREWORD 3

INTRODUCTION 5

1 Sco e 6

2 Normative ref eren es 6

3 Terms, def i ition an a breviation 6

3.1 Terms an def i ition 6

3 2 Ab reviation

6 4 Vis al in p ction method an criteria 6

4.1 Stan ard in p ction con ition an method 6

4.1.1 Ambient con ition 6

4.1.2 In p ction eq ipment an l q id cry tal display cel s

7 4.1.3 In p ctor an l mit sample f or vis al in p ction 7

4.1.4 In p ction an record of res lt 7

4.2 Vis al in p ction of display 7

4.2.1 Display not activated 7

4.2.2 Display activated 9

4.2.3 Se l in p ction 1

4.2.4 Contact p d are 12 4.2.5 Chip ed material at the b rders an ed es of s p ort plates of cel s 13 Biblogra h 14 Fig re 1 – Defects within the viewin are 8

Fig re 2 – Deviation of dimen ion an s a e e to e4 9

Fig re 3 – Def ects within segments 9

Fig re 4 – Def ects within the se l n are 1

Fig re 5 – Def ects of contact p d are 12 Fig re 6 – Damage of a corner an an ed e 1

3 Ta le 1 – Vis al def ects to b in p cted 8

Ta le 2 – Pro erties of display are to b in p cted 10 Ta le 3 – Defects of display are to b in p cted 1

0 Ta le 4 – Defects of viewin are to b in p cted 10 Ta le 5 – Defects of se l n are to b in p cted 1

Ta le 6 – Vis al def ects of contact p d are to b in p cted 12 Ta le 7 – Defects of pin to b in p cted 1

3

Ta le 8 – Defects of le d to b in p cted 13

Ta le 9 – Defects of s p ort plate to b in p cted 13

INTERNATIONAL ELECTROTECHNICAL COMMISSION

Part 20-1: Visual inspection – Monochrome l quid crystal display

cel s (excluding al active matrix l quid crystal display cel s)

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

al n tio al ele trote h ic l c mmite s (IEC Natio al Commite s) Th o je t of IEC is to promote

intern tio al c -o eratio o al q e tio s c n ernin sta d rdiz tio in th ele tric l a d ele tro ic f i ld To

this e d a d in a ditio to oth r a tivitie , IEC p bls e Intern tio al Sta d rd , Te h ic l Sp cif i atio s,

Te h ic l Re orts, Pu lcly Av ia le Sp cif i atio s (P S) a d Guid s (h re fter refer e to a “IEC

Pu lc tio (s)”) Th ir pre aratio is e tru te to te h ic l c mmite s; a y IEC Natio al Commite intere te

in th s bje t d alt with ma p rticip te in this pre aratory work Intern tio al g v rnme tal a d n n

-g v rnme tal org niz tio s laisin with th IEC als p rticip te in this pre aratio IEC c la orate clo ely

with th Intern tio al Org niz tio f or Sta d rdiz tio (ISO) in a c rd n e with c n itio s d termin d b

a re me t b twe n th two org niz tio s

2) Th f ormal d cisio s or a re me ts of IEC o te h ic l maters e pre s, a n arly a p s ible, a intern tio al

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misinterpretatio b a y e d u er

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th later

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International Stan ard IEC 617 7-2 -1 has b en pre ared by IEC tec nical commite 1 0:

Electronic display devices

This first edition can els an re laces Clau e 6 of the f irst edition of IEC 617 7-5 publ s ed in

19 8 This edition con titutes a tec nical revision

This edition in lu es the fol owin sig if i ant tec nical c an es with resp ct to the previou

edition:

a) The editorial modification were done in ac ordan e with the ISO/IEC Directives, Part 2,

Ed 6.0:2 1

b) The doc ment n mb r was c an ed to al g with the new n mb rin stru ture of the

IEC 617 7 series

NOT It is inte d d th t th oth r cla s s of IEC 617 7-5:19 8 wi b re la e b n w p rts in th IEC 617 7

s rie Th d tais of th inte d d c a g s are giv n in An e D of IEC 617 7-3 - :2 12

The text of this stan ard is b sed on the fol owin doc ments:

Ful inf ormation on the votin f or the a proval of this stan ard can b foun in the re ort on

votin in icated in the a ove ta le

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

A l st of al p rts in the IEC 617 7 series, publs ed u der the general title Liquid cryst al

d ispl ay d evic s, can b f ou d on the IEC we site

The commit e has decided that the contents of this publ cation wi remain u c an ed u ti

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

related to the sp cif i publ cation At this date, the publ cation wi b

• with rawn,

• re laced by a revised edition, or

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

This part of IEC 617 7 faci tates the vis al in p ction of image def ects of monoc rome LCD

cel s by h man eyes s bjectively Vis al in p ction is p rf ormed at sp cified con ition an

criteria The o jective me s rement method of vis al image defect with an in trument wi b

stu ied an stan ardized

LIQUID CR YST AL DISPLAY DEVICES –

Part 20-1: Visual inspection – Monochrome l quid crystal display

cel s (excluding al active matrix l quid crystal display cel s)

This p rt of IEC 617 7 gives the detais of testin an provides general rules for vis al

in p ction of the non-active an active are of monoc rome l q id cry tal display cel s by the

h man eye, if neces ary, throu h an o tical micros o e Furthermore this stan ard in lu es

defect def i ition an the method for vis al def ect in p ction

NOT Re trictio s o d f ect ty e , n mb r, a d siz s are s e if i d in th q alty c ntra t (c stomer a c pta c

s e if i atio a d in omin in p ctio s e if i atio )

The f ol owin doc ments, in whole or in p rt, are normatively ref eren ed in this doc ment an

are in isp n a le f or its a pl cation For dated ref eren es, only the edition cited a ples For

u dated referen es, the latest edition of the referen ed doc ment (in lu in an

amen ments) a pl es

IEC 617 7-1-2:2 14, Liquid cryst al d isplay d evic s – Part 1-2: Ge eric – Terminolo y a d

let ter symb ls

IEC 617 7-10-2:2 14, Liquid cryst al d isplay d evices – Part 10-2: Enviro me tal , e d ura c

a d me h nic l test met hods – Enviro me tal a d e d ura c

3.1 Terms a d def initions

For the purp ses of this doc ment, the terms, def i ition an let er s mb ls given in

IEC 617 7-1-2 an IEC 617 7-10-2 a ply

3.2 Abbre iations

DUT Device u der test

4 Visual inspection method and criteria

4.1 Sta dard inspe tion conditions a d methods

4.1.1 Ambie t conditions

4.1.1.1 Temperature

IEC 617 7-10-2:2 14, Clau e 4

4.1.1.2 Humidity

Al vis al in p ction s al b car ied-out u der sp cified h midity Ref er to IEC 617 7-1

0-2:2 14, Clau e 4

4.1.1.3 I umin nc

Al vis al in p ction s al b car ied out un er i umination levels as sp cif ied in the detai

sp cification The i umination level s al b adju ted in s c a way that it al ows for an

ac urate vis al in p ction

4.1.2 In pe tion e uipme t a d l quid cry tal displa c l s

The DUT wi b in tal ed on a rotata le fixture to ena le c an es in the horizontal an

vertical viewin direction ran e Alternatively, the in p ctor moves arou d an the DUT is

f i ed

Turn on the direct c r ent p wer s p ly an p tern generator an warm up f or sta i zation

Sup ly the drivin voltage an p t ern to the DUT The warm-up time of the DUT s al b

s ff i iently lon to o tain a sta le sig al, neces ary for the vis al in p ction

4.1.3 In pe tor a d l mit s mple f or vis al inspe tion

The in p ctor s al have a (cor ected-to) normal vision, a normal colour vision an s al b

p riodical y trained with sp cif ied l mit samples in order to ac urately car y out the vis al

examination

4.1.4 In pe tion a d re ord of re ult

The in p ctor s al car y out the vis al in p ction b sed on the sp cif ied proced re an

record the res lts on recordin s e ts with the sp cif ied in p ction con ition

4.2 Vis al inspe tion of displa

4.2.1 Displa not a tiv te

4.2.1.1 Te t conditions to be spe ifie in the detai spe ific tion

The test con ition to b sp cified in the detai sp cif i ation are:

The test con ition of the vis al in p ction s al b des rib d for the folowin con ition :

– the viewin direction ran e;

– the i umination fom a ove or throu h the device (de en in on the a plcation);

– the d ration;

– the viewin distan e

4.2.1.2 Proc dure

Devices s al b in p cted f or the f ol owin vis al defects in Ta le 1

Table 1 – Vis al defe ts to be inspe te

Sp ts (s e Fig re 1 , b b le , f oreig p rticle To b s e if i d in th d tai s e if i atio

Scratc e o th lq id cry tal c l a d o th

p lariz r within th s e ifie viewin dire tio ra g

To b s e if i d in th d tai s e if i atio

Me h nic l d ma e o tsid of viewin are (s e

Fig re 5 a d 6)

To b s e if i d in d tai s e if i atio

Ac umulatio of th a o e-lste visible d f ects Refere c s mple

Visible stru ture of th ele tro e within th viewin

are

Refere c s mple

No -u iformity of lumin n e a d c lo rs within th

viewin are of th dis la a d within th s e ifie

viewin dire tio ra g

Refere c s mple

Dirt o s rf ac , e.g fin er prints, a h siv re id e Refere c s mple

Key

A = c nta t p d D = d fe t

B = s aln are h = h ig t

Figure 1 – Def ects within the viewing are

IEC

w

4.2.2 Displa a tivate

4.2.2.1 Ov ral g ometric l a pe t of the displa

The deviation an defects of the display are s own in Fig re 2 an Fig re 3

Figure 2 – De iations of dimen ion a d s ape e1 to e

Key

h = h ig t w = width

Figure 3 – Def ects within s gme ts

4.2.2.1.2 Te t conditions to be spe ifie in the detai spe if ic tion

The test con ition of the vis al in p ction s al b des rib d f or the fol owin con ition :

– the electrical drivin con ition ;

– the i umination;

– the ambient temp rature

4.2.2.1.3 Proc d re

Devices s al b in p cted to b in conf ormity with the detai sp cification in Ta le 2 an

Ta le 3

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w

IEC

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