SIST EN 62341-1-2:2010

Organic light emitting diode displays - Part 1-2: Terminology and letter symbols (IEC 62341-1-2:2007)

This part of IEC 62341 gives preferred terms, their definitions and symbols for organic light emitting diode (OLED) displays; with the object of using the same terminology when publications are prepared in different countries.

Anzeigen mit organischen Leuchtdioden - Teil 1-2: Begriffe und Buchstabensymbole (IEC 62341-1-2:2007)

Afficheurs à diodes électroluminescentes organiques - Partie 1-2: Terminologie et symboles littéraux (CEI 62341-1-2:2007)

La présente partie de la CEI 62341 fournit les termes préférentiels, leurs définitions et symboles pour les afficheurs à diodes électroluminescentes organiques (OLED, Organic Light Emitting Diode); dans le but d'utiliser la même terminologie lorsque des publications sont établies dans différents pays.

Prikazovalniki z organskimi svetlečimi diodami - 1-2. del: Terminologija in črkovni simboli (IEC 62341-1-2:2007)

Ta del IEC 62341 podaja prednostne izraze, njihove opredelitve in simbole za prikazovalnike z organskimi svetlečimi diodami (OLED); s ciljem uporabe iste terminologije, ko se publikacije pripravljajo v različnih državah.

General Information

• Status: Published
• Publication Date: 17-Jan-2010
• ICS: 01.040.31 - Electronics (Vocabularies)
• ICS: 31.120 - Electronic display devices
• Technical Committee: I11 - Imaginarni 11
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 22-Dec-2009
• Due Date: 26-Feb-2010
• Completion Date: 18-Jan-2010
• Ref Project: EN 62341-1-2:2009 - Organic light emitting diode displays - Part 1-2: Terminology and letter symbols

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 62341-1-2:2010
01-februar-2010
3ULND]RYDOQLNL]RUJDQVNLPLVYHWOHþLPLGLRGDPLGHO7HUPLQRORJLMDLQþUNRYQL
VLPEROL,(&
Organic light emitting diode displays - Part 1-2: Terminology and letter symbols (IEC
62341-1-2:2007)
Anzeigen mit organischen Leuchtdioden - Teil 1-2: Begriffe und Buchstabensymbole
(IEC 62341-1-2:2007)
Afficheurs à diodes électroluminescentes organiques - Partie 1-2: Terminologie et
symboles littéraux (CEI 62341-1-2:2007)
Ta slovenski standard je istoveten z: EN 62341-1-2:2009
ICS:
01.040.31 Elektronika (Slovarji) Electronics (Vocabularies)
31.120 Elektronske prikazovalne Electronic display devices
naprave
SIST EN 62341-1-2:2010 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 62341-1-2:2010

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SIST EN 62341-1-2:2010

EUROPEAN STANDARD
EN 62341-1-2

NORME EUROPÉENNE
December 2009
EUROPÄISCHE NORM

ICS 31.260


English version


Organic light emitting diode displays -
Part 1-2: Terminology and letter symbols
(IEC 62341-1-2:2007)


Afficheurs à diodes électroluminescentes Anzeigen mit organischen Leuchtdioden -
organiques - Teil 1-2: Begriffe und Buchstabensymbole
Partie 1-2: Terminologie et symboles (IEC 62341-1-2:2007)
littéraux
(CEI 62341-1-2:2007)




This European Standard was approved by CENELEC on 2009-12-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: Avenue Marnix 17, B - 1000 Brussels


© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62341-1-2:2009 E

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SIST EN 62341-1-2:2010
EN 62341-1-2:2009 - 2 -
Foreword
The text of document 110/125/FDIS, future edition 1 of IEC 62341-1-2, prepared by IEC TC 110, Flat
panel display devices, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC
as EN 62341-1-2 on 2009-12-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2010-09-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2012-12-01
__________
Endorsement notice
The text of the International Standard IEC 62341-1-2:2007 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 60027 NOTE  Harmonized in EN 60027 series (not modified).
__________

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SIST EN 62341-1-2:2010
IEC 62341-1-2
Edition 1.0 2007-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Organic light emitting diode displays –
Part 1-2: Terminology and letter symbols

Afficheurs à diodes électroluminescentes organiques –
Partie 1-2: Terminologie et symboles littéraux

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
U
CODE PRIX
ICS 31.260 ISBN 2-8318-9433-6

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SIST EN 62341-1-2:2010
– 2 – 62341-1-2 © IEC:2007
CONTENTS
FOREWORD.3

1 Scope.5
2 Terms and definitions .5
2.1 Classification of terms .5
2.2 Fundamental terms.5
2.3 Terms related to physical properties.8
2.4 Terms related to constructive elements .11
2.5 Terms related to performances and specifications .15
2.6 Terms related to production process.23
3 Letter symbols (Quantity symbols / Unit symbols).24
3.1 Classification.24
3.2 Letter symbols.24

Annex A (normative) Supplement of term.26

Bibliography.28

Figure A.1 – Pixel Pitch .26
Figure A.2 – Viewing Direction.27

Table 1 – Fundamental symbols .24
Table 2 – Symbols related to physical properties .25
Table 3 – Symbol related to constructive elements .25
Table 4 – Symbols related to performances and specifications .25

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SIST EN 62341-1-2:2010
62341-1-2 © IEC:2007 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________

ORGANIC LIGHT EMITTING DIODE DISPLAYS –

Part 1-2: Terminology and letter symbols


FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62341-1-2 has been prepared by IEC technical committee 110:
Flat panel display devices.
The text of this standard is based on the following documents:
FDIS Report on voting
110/125/FDIS 110/132/RVD

Full information on the voting for the approval on this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

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SIST EN 62341-1-2:2010
– 4 – 62341-1-2 © IEC:2007
A list of all the parts in the IEC 62341 series, under the general title Organic light emitting
diode displays, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.

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SIST EN 62341-1-2:2010
62341-1-2 © IEC:2007 – 5 –
ORGANIC LIGHT EMITTING DIODE DISPLAYS –

Part 1-2: Terminology and letter symbols



1 Scope
This part of IEC 62341 gives preferred terms, their definitions and symbols for organic light
emitting diode (OLED) displays; with the object of using the same terminology when
publications are prepared in different countries.
2 Terms and definitions
For purposes of this document, the following terms and definitions apply.
2.1 Classification of terms
Terms for organic light emitting diode (OLED) displays are classified as follows.
a) Fundamental terms
b) Terms related to physical properties
c) Terms related to constructive elements
d) Terms related to performances and specifications
e) Terms related to production process
2.2 Fundamental terms
2.2.1
active matrix (addressed) driving
matrix driving method in which each pixel or subpixel has at least one active switching (e.g.
diode or transistor) and storage element
2.2.2
addressing method
method of selecting each pixel or subpixel for activation
2.2.3
alphanumeric display
display that is able to show a limited set of characters comprising at least letters and Arabic
numerals
2.2.4
area-colour display
display in which the display panel is partitioned into several parts, each one shows a colour
different from each other
2.2.5
bottom emission
device structure, in which almost all light emitted passes through a substrate on which organic
electroluminescent layers are made

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SIST EN 62341-1-2:2010
– 6 – 62341-1-2 © IEC:2007
2.2.6
bottom emission display
display using bottom emission structure
2.2.7
constant-current driving
driving method where a constant current is applied to each pixel or subpixel
2.2.8
constant-voltage driving
driving method where a constant voltage is applied to each pixel or subpixel
2.2.9
display with a bright background
display showing dark images on a bright background
2.2.10
display with a dark background
display showing bright images on a dark background
2.2.11
doping method
method of adding a small quantity of different material to host material
NOTE This method is used in order to improve device characteristics or to change the emission spectrum.
2.2.12
driving method
specific method for activating each pixel or subpixel
2.2.13
dual emission display
display in which light is emitted from both sides (top and bottom) of a substrate on which
organic electroluminescent layers are made
2.2.14
emissive display
display with pixels or subpixels that emit light
2.2.15
flexible display
display that is mechanically flexible
2.2.16
full-colour display
display capable of showing at least 3 primary colours, the colour gamut of which includes a
white area (e.g. containing D50, D65, D75) and having at least 64 grey scale per primary
2.2.17
matrix display
display consisting of regularly arranged pixels and/or subpixels, e.g. arranged in rows and
columns
2.2.18
molecular organic light emitting diode display
organic light emitting diode display composed of organic (small) molecules

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SIST EN 62341-1-2:2010
62341-1-2 © IEC:2007 – 7 –
2.2.19
monochrome display
display capable of reproducing only one colour
2.2.20
multi-colour display
display other than monochrome display and full-colour display
2.2.21
multiplex driving
driving method of time-share driving in which one common electrode is addressed to more
than two pixels or subpixels
2.2.22
organic electroluminescence
OEL
emission from organic materials by recombination of negatively and positively charged
carriers when forward electric bias is applied
2.2.23
organic electroluminescent display
OEL display
display showing visual information using organic electroluminescence
2.2.24
organic light emitting diode
OLED
light emitting diode in which light is emitted from organic materials
2.2.25
organic light emitting diode display
OLED display
display incorporating organic light emitting diodes
2.2.26
organic light emitting diode display module
organic light emitting diode display panel, its driving electronics and optical films if used in the
device design
2.2.27
organic light emitting diode (display) panel
display panel of an organic light emitting diode display without external drivers
2.2.28
passive matrix addressing
matrix driving method in which each pixel or subpixel is addressed directly by applied signals
on the addressing and data lines
2.2.29
polymer organic light emitting diode
light emitting diode in which light is emitted from polymeric materials
NOTE The term “polymer light emitting diode” is sometimes used.
2.2.30
segment display
display with symbols built-up by fixed patterns and segments

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SIST EN 62341-1-2:2010
– 8 – 62341-1-2 © IEC:2007
2.2.31
standard atmospheric condition
standard conditions of atmosphere for tests and measurements
NOTE Generic term of "standard reference atmosphere", "standard atmospheres for referee" and "standard
atmospheric conditions for measurements and tests".
2.2.32
standard light source
light source that approximates a defined illuminant, such as CIE illuminant A and D65
2.2.33
standard reference atmosphere
reference atmospheric conditions used for standardizing the data measured under different
atmospheric conditions
2.2.34
standard test condition
all of conditions of the environment for tests and measurements
2.2.35
static driving
method of driving in which all pixels are activated simultaneously and constantly
2.2.36
top emission
device structure, in which almost all light emitted (toward) outside from a (top) side, where
OLED device is formed on, of a substrate
2.2.37
top emission display
display using top emission structure
2.2.38
transparent display
display in which the display area is visibly transparent
2.2.39
zone-colour display
NOTE See area-colour display.
2.3 Terms related to physical properties
2.3.1
charge carrier density
density of mobile electrons and/or holes in a material
-3
NOTE Expressed in cm .
2.3.2
crystallization temperature
temperature at which material changes into crystalline state when it is cooled from liquid state,
molten state or solution form
NOTE In case of amorphous material, the temperature at which material changes into partly or wholly crystalline
state.
2.3.3
electroluminescence spectrum
spectral distribution of the light emitted by the process of electroluminescence

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SIST EN 62341-1-2:2010
62341-1-2 © IEC:2007 – 9 –
2.3.4
electron affinity
energy between the vacuum level and the bottom of the conduction band
NOTE Expressed in eV.
2.3.5
energy level
discrete energy state of the atom or the molecule or the exciton
2.3.6
external quantum efficiency
ratio of the number of the photons emitted from an organic light emitting diode divided by the
number of the injected electrons or holes
NOTE An external quantum efficiency is indicated as a product of an internal quantum efficiency and an external
light out-coupling efficiency.
2.3.7
fluorescence yield (efficiency)
ratio of the number of fluorescent photons divided by the number of photons absorbed into the
material
2.3.8
fluorescence
emission of light from an excited singlet state of materials
2.3.9
glass transition temperature
temperature at which an amorphous material freezes when cooled rapidly to become a
solidified supercooled liquid
NOTE This temperature depends on the cooling rate and is characterized by a change in the expansion
coefficient.
2.3.10
highest occupied molecular orbitals
HOMO
highest molecular orbitals occupied by electrons
2.3.11
injection barrier
energy barrier of the carrier injection at the interface of organic layer and organic layer or at
the interface of organic layer and electrode
2.3.12
internal quantum efficiency
ratio of the number of the photons produced from the electric charges injected from the
electrode divided by the number of the injected electrons or holes
NOTE An internal quantum efficiency is indicated as a product of a recombination probability of electrons and
holes, an efficiency of exciton generation through carrier recombination and an efficiency of photon generation
from exciton.
2.3.13
ionization potential
minimum energy required to remove an electron from a specified atom or molecule to such a
distance that there is no electrostatic interaction between ion and electron
NOTE  Expressed in eV.

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SIST EN 62341-1-2:2010
– 10 – 62341-1-2 © IEC:2007
2.3.14
lowest unoccupied molecular orbitals
LUMO
lowest molecular orbitals unoccupied by electrons
2.3.15
material purity
amount of the desired substance within a material product
NOTE Expressed in wt%.
2.3.16
melting point
temperature at which the solid state material maintains equilibrium between liquid state and
solid state at a certain pressure
NOTE Usually at 1013 hPa.
2.3.17
mobility
proportionality factor between electron (or hole) drift velocity and electric field
-1 -1
2
NOTE Expressed in cm V s .
2.3.18
optical axis
distinguished direction in optically anisotropic materials and elements, e.g. polarizers, wave
plates and retarders
2.3.19
phosphorescence yield (efficiency)
ratio of the number of phosphorescent photons divided by the number of photons absorbed
into the material
2.3.20
phosphorescence
emission of light from an excited triplet state of materials
2.3.21
photoluminescence spectrum
spectral distribution of the light emitted from materials excited by light of wavelengths shorter
than that of the photoluminescent emission
2.3.22
polarization axis
direction of electrical field vector of polarized light
2.3.23
quantum efficiency
ratio of the number of generated photons divided by the number of input photons or injected
electric charges
2.3.24
quantum yield
NOTE See quantum efficiency.
2.3.25
sheet resistance
electrical resistance of a conductive thin film with a square shape; measured from one side of
the square to the opposite side

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SIST EN 62341-1-2:2010
62341-1-2 © IEC:2007 – 11 –
NOTE Defined as Rs=ρ/d, where ρ: resistivity coefficient, d: thickness.
2.3.26
square resistance
NOTE See sheet resistance.
2.3.27
surface roughness
degree of roughness of surface or interface
2
NOTE Usually, expressed in mean square deviation per cm of surface height measured by AFM or similar
method.
2.3.28
work function
minimum energy required to remove an electron from the Fermi level of a material into the
vacuum level
NOTE Expressed in eV.
2.4 Terms related to constructive elements
2.4.1
amorphous silicon
solid-state silicon without distinct crystalline structure
NOTE Carrier mobility is rather low compared with polycrystalline silicon.
2.4.2
anode
electrode, which supplies holes to an organic light emitting diode display panel
2.4.3
anode separator
rib to electrically separate each anode from the adjacent anode in a passive matrix organic
light emitting diode display panel
2.4.4
bank
raised elevation that is fabricated around each pixel or subpixel
NOTE Generally, it is used to prevent overflowing of coated solution.
2.4.5
black matrix
film-like structure that absorbs ambient or internally scattered light
2.4.6
buffer layer
general term used to describe a layer inserted in the device structure which may be used, for
example, to improve current injection or reduce surface roughness
2.4.7
cathode
electrode, which supplies electrons to an organic light emitting diode display panel
2.4.8
cathode separator
rib to electrically separate each cathode from the adjacent cathode in a passive matrix
organic light emitting diode display panel

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SIST EN 62341-1-2:2010
– 12 – 62341-1-2 © IEC:2007
2.4.9
circular polarizer
optical component consisting of a linear polarizer and 1/4-wavelength retarder plate which
transforms the component of incoming light parallel to the polarizer, into circularly polarized
light
2.4.10
colour changing medium
medium containing fluorescent dyes that absorb emission energy of organic electro-
luminescence and re-emit photons with longer wavelength than the absorbed photons
2.4.11
colour filter
material that selectively absorbs, reflects, and transmits light of specific wavelength ranges
NOTE Generally, it is used as 3-primary colour (red, green, blue) filters with white organic light emitting diode for
colour image display or as a filter to improve the colour saturation of an organic light emitting diode.
2.4.12
common electrode
a) electrode connected to all segments in a segment display
b) row- or column scanning electrode in a passive matrix display
c) electrode connecting all pixels in a row and/or a column in an active matrix display
2.4.13
data electrode
electrode driven by the data signal voltage or current synchronized with the scanning signals
in a multiplexed display
2.4.14
dopant
different materials added to host material in small quantity to improve device characteristics
such as enhancement of luminous efficacy, spectrum change of emission, and decreasing of
resistance
2.4.15
dot electrode
discrete electrode for each pixel or subpixel in an active matrix display, which is separated
from the signal electrode line by a switching device such as TFT
2.4.16
driver
circuits that supply signal- and scanning voltages and/or currents to a display panel
NOTE There are two types of drivers, a scanning electrode (row electrode) driver and a signal electrode (column
electrode) driver, in a matrix display.
2.4.17
electron blocking layer
organic layer that blocks the flow of electrons in an organic light emitting diode with multilayer
structure; usually an organic material with smaller electron affinity than the electron
transporting layer
2.4.18
electron injection layer
layer inserted between a cathode and an electron transport layer to efficiently inject electrons
from the cathode into the organic layer in an organic light emitting diode

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SIST EN 62341-1-2:2010
62341-1-2 © IEC:2007 – 13 –
2.4.19
electron transport layer
layer that efficiently transports electrons injected from a cathode into a light emitting layer in
an organic light emitting diode
2.4.20
encapsulation
enclosing device/structure to protect the organic layers and the electrodes from humidity
and/or oxygen
2.4.21
encapsulation/cover glass
glass to protect the organic layer and the electrodes from humidity and/or oxygen
2.4.22
exciton blocking layer
organic layer with a wide energy band gap that blocks exciton diffusion, usually incorporated
in an organic light emitting diode for confining triplet excitons in a light emitting layer
2.4.23
gate electrode
electrode which controls or connects with a gate terminal of a transistor in an active matrix
display
2.4.24
getter
material that helps maintain vacuum by chemically adsorbing gases outgassing from the
surfaces in vacuum
2.4.25
hole blocking layer
layer inserted between an emitting layer and an electron transport layer to increase
probability of recombination of electrons and holes in the emitting layer
2.4.26
hole injection layer
layer inserted between an anode and a hole transport layer to efficiently inject holes from the
anode into the organic layer in an organic light emitting diode
2.4.27
hole transport layer
layer that efficiently transports holes injected from an anode into a light emitting layer in an
organic light emitting diode
2.4.28
host material
material that provides a mechanical/electrical matrix for the dopants
2.4.29
insulating layer
insulator formed below the cathode separator to prevent electrical short between anodes and
cathodes
2.4.30
light emitting layer
layer that emits light by recombination of electrons and holes

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SIST EN 62341-1-2:2010
– 14 – 62341-1-2 © IEC:2007
2.4.31
low temperature polysilicon
poly-crystalline silicon fabricated at substrate temperature below 450 °C
2.4.32
microlens (array)
optical lenses fabricated close to pixels in order to enhance the out-coupling efficiency of
emission
2.4.33
molecular material
organic materials used for an organic light emitting diode, often indicates organic materials
with molecular weight of less than 2 000
NOTE Different molecular materials are used for carrier injection, carrier transport, and emission in a multilayer
form.
2.4.34
multi-layer organic structure
structure that has multiple organic layers to improve emission efficiency
NOTE Each layer has one or more functions, such as electron transport, emission or hole transport.
2.4.35
OLED controller
electric device that supplies control signal voltages, e.g. timing signals, to operate driving ICs
NOTE It may process display signals such as analogue to digital (A/D) and/or digital to analogue (D/A) signal
conversion and an IC for controller is called controller-IC.
2.4.36
panel substrate
supporting material, generally transparent, made of e.g. glass or plastic sheet on which the
electrodes, wiring, and organic layers of an organic light emitting diode display panel are
formed
2.4.37
passivation
method to protect the organic layers and the electrodes from humidity and/or oxygen
2.4.38
polymer material
organic materials used for an organic light emitting diode, this term often indicates organic
materials with molecular weight of higher than 10 000
NOTE Different polymer materials are used for carrier injection, carrier transport, and emission in a multiplayer
form.
2.4.39
protection sheet
plastic sheet that protects a display panel surface from mechanical harm during fabricating
and/or shipping an organic light emitting diode display
2.4.40
scanning electrode
electrode connected to the scanning signal in a matrix display
2.4.41
sealant
adhesive for encapsulation

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