IEC 62908-22-10:2024

Touch and interactive displays - Part 22-10: Measuring methods of fingerprint recognition performance - Under-display optical imaging fingerprint sensing

IEC 62908-22-10:2024 specifies the standard measuring conditions and measurement methods for determining the performance of fingerprint recognition systems with under-display optical imaging fingerprint sensing. This document is applicable to use displays as illumination sources of optical imaging fingerprint sensing.

General Information

• Status: Published
• Publication Date: 18-Nov-2024
• ICS: 31.120 - Electronic display devices
• Technical Committee: TC 110 - Electronic displays
• Drafting Committee: WG 9 - TC 110/WG 9
• Current Stage: PPUB - Publication issued
• Start Date: 19-Nov-2024
• Completion Date: 20-Dec-2024

Overview

IEC 62908-22-10:2024 - "Touch and interactive displays - Part 22-10: Measuring methods of fingerprint recognition performance - Under‑display optical imaging fingerprint sensing" specifies standardized measuring conditions and methods for evaluating the performance of fingerprint recognition systems where the optical imaging sensor is located beneath a display. The standard is applicable when the display itself is used as the illumination source for the optical fingerprint capture.

Key topics

This standard defines practical, repeatable test methods and reporting requirements focused on under‑display optical fingerprint sensing. Major technical topics include:

• Measuring conditions and starting conditions - standard environmental and setup conditions for consistent measurements (darkroom, ambient illumination, equipment state).
• Measuring system and test setup - required configuration for the under‑display optical fingerprint recognition system and standard equipment layout.
• Fingerprint recognition system resolution - measurement using the contrast transfer function (CTF) to quantify image resolution of ridge/valley patterns.
• Signal‑to‑noise ratio (SNR) - methods to measure image quality relevant to reliable recognition.
• Authentication metrics - procedures for measuring False Acceptance Rate (FAR) and False Rejection Rate (FRR) for performance evaluation.
• Optical parameters (Annex A) - standardized methods for measuring display optical characteristics that affect sensing, such as luminance, extinction ratio, light leakage ratio, and luminous transmittance.
• Reporting requirements - clear presentation of test conditions, measurement methods and outcomes to support reproducibility and comparison.

Applications and who uses it

IEC 62908-22-10:2024 is intended for professionals involved in design, validation and certification of in‑display fingerprint biometric systems, including:

• Display manufacturers integrating optical sensors beneath LCD or OLED panels.
• Biometric sensor and module developers tuning imaging and matching algorithms.
• Product R&D and quality assurance teams validating authentication performance on smartphones, tablets, laptops and other interactive displays.
• Independent test laboratories and certification bodies performing standardized performance assessments.
• Security and compliance engineers assessing biometric reliability for user authentication.

Using this standard helps manufacturers reduce variability between test labs, compare sensor performance objectively, and optimize display and sensor co‑design for improved biometric accuracy.

Related standards

Relevant references cited in the document:

• IEC 61747-30-5 - LCD optical measuring methods
• IEC 62341-6-1 and IEC 62341-6-4 - OLED optical and transparent properties measurement methods

Keywords: IEC 62908-22-10:2024, under‑display optical imaging fingerprint sensing, fingerprint recognition performance, measuring methods, contrast transfer function, SNR, FAR, FRR, touch and interactive displays.

Standards Content (Sample)

IEC 62908-22-10 ®
Edition 1.0 2024-11
INTERNATIONAL
STANDARD
colour
inside
Touch and interactive displays –
Part 22-10: Measuring methods of fingerprint recognition performance – Under-
display optical imaging fingerprint sensing

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Secretariat Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews, graphical symbols and the glossary.
committee, …). It also gives information on projects, replaced With a subscription you will always have access to up to date
and withdrawn publications. content tailored to your needs.

IEC Just Published - webstore.iec.ch/justpublished
Electropedia - www.electropedia.org
Stay up to date on all new IEC publications. Just Published
The world's leading online dictionary on electrotechnology,
details all new publications released. Available online and once
containing more than 22 500 terminological entries in English
a month by email.
and French, with equivalent terms in 25 additional languages.

Also known as the International Electrotechnical Vocabulary
IEC Customer Service Centre - webstore.iec.ch/csc
(IEV) online.
If you wish to give us your feedback on this publication or need

further assistance, please contact the Customer Service
Centre: [e-mail].
IEC 62908-22-10 ®
Edition 1.0 2024-11
INTERNATIONAL
STANDARD
colour
inside
Touch and interactive displays –

Part 22-10: Measuring methods of fingerprint recognition performance – Under-

display optical imaging fingerprint sensing

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.120  ISBN 978-2-8327-0031-0

– 2 – IEC 62908-22-10:2024 © IEC 2024
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions, and abbreviated terms . 6
3.1 Terms and definitions . 6
3.2 Abbreviated terms . 7
4 Measuring conditions . 7
4.1 Standard measuring environmental conditions . 7
4.2 Starting conditions of measurements . 8
5 Measuring system . 8
5.1 Under-display optical fingerprint recognition system . 8
5.2 Standard equipment and setup . 8
6 Measurement method of fingerprint recognition performance . 9
6.1 Fingerprint recognition system resolution . 9
6.1.1 Purpose . 9
6.1.2 Measuring conditions . 9
6.1.3 Measurement method . 10
6.1.4 Reporting . 11
6.2 SNR . 11
6.2.1 Purpose . 11
6.2.2 Measurement method . 11
6.2.3 Reporting . 12
6.3 FAR and FRR . 12
6.3.1 Purpose . 12
6.3.2 Measurement method . 12
6.3.3 Reporting . 13
Annex A (normative) Measurement method for optical parameters . 14
A.1 General . 14
A.2 Standard lighting conditions . 14
A.2.1 Darkroom conditions . 14
A.2.2 Ambient illumination conditions . 14
A.2.3 Ambient illumination spectra . 14
A.3 Standard setup conditions . 14
A.3.1 Starting conditions of measurements . 14
A.3.2 Conditions of measuring equipment . 15
A.4 Luminance . 15
A.4.1 Purpose . 15
A.4.2 Measuring equipment . 15
A.4.3 Measurement method . 16
A.4.4 Reporting . 16
A.5 Extinction ratio . 16
A.5.1 Purpose . 16
A.5.2 Measuring equipment . 16
A.5.3 Measurement method . 16
A.5.4 Reporting . 17
A.6 Light leakage ratio . 17

A.6.1 Purpose . 17
A.6.2 Measuring equipment . 17
A.6.3 Measurement method . 18
A.6.4 Reporting . 18
A.7 Luminous transmittance . 18
A.7.1 Purpose . 18
A.7.2 Measuring equipment . 19
A.7.3 Measurement method . 19
A.7.4 Reporting . 19
Bibliography . 20

Figure 1 – Structure diagram of under-display optical imaging fingerprint recognition
system . 8
Figure 2 – Flow chart of measuring system . 9
Figure 3 – Concept of performance measurement . 9
Figure 4 – Example of test target . 10
Figure 5 – Test pattern for resolution measurement . 11
Figure 6 – Example of n × n pixels block in the valley and ridge region [1] . 12
Figure A.1 – Layout diagram of measurement setup . 15
Figure A.2 – Measuring configuration for extinction ratio measurement . 17
Figure A.3 – Measuring configuration for light leakage ratio measurement . 18
Figure A.4 – Measurement configuration with light source . 19

– 4 – IEC 62908-22-10:2024 © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TOUCH AND INTERACTIVE DISPLAYS –

Part 22-10: Measurement methods of fingerprint recognition
performance – Under-display optical imaging fingerprint sensing

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 itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 62908-22-10 has been prepared by IEC technical committee 110: Electronic displays. It is
an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
110/1692/FDIS 110/1713/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.

This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 62908 series, published under the general title Touch and interactive
displays, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.

– 6 – IEC 62908-22-10:2024 © IEC 2024
TOUCH AND INTERACTIVE DISPLAYS –

Part 22-10: Measurement methods of fingerprint recognition
performance – Under-display optical imaging fingerprint sensing

1 Scope
This part of IEC 62908 specifies the standard measuring conditions and measurement methods
for determining the performance of fingerprint recognition systems with under-display optical
imaging fingerprint sensing. This document is applicable to use displays as illumination sources
of optical imaging fingerprint sensing.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 61747-30-5, Liquid crystal display devices – Part 30-5: Optical measuring methods of
transmissive transparent LCD modules
IEC 62341-6-1, Organic light emitting diode (OLED) displays – Part 6-1: Measuring methods of
optical and electro-optical parameters
IEC 62341-6-4, Organic light emitting diode (OLED) displays – Part 6-4: Measuring methods of
transparent properties
3 Terms, definitions, and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1.1
optical imaging fingerprint recognition
recognition method of fingerprint by optical
image sensor located beneath the display
3.1.2
fingerprint recognition system resolution
degree of resolution of a fingerprint image
acquired by an under-display optical fingerprint recognition system, which is calculated using
the contrast transfer function (CTF)

3.1.3
contrast transfer function
CTF
ratio of the final to the initial signal
amplitude as a function of the spatial frequency of the initial signal
3.1.4
fingerprint ridge
convex part on the skin of the fingers, which makes contact with an incident surface under
normal touch
Note 1 to entry: On the fingers, the unique patterns formed by the ridges make up fingerprints.
3.1.5
fingerprint valley
area between two fingerprint ridges that does not make contact with an incident surface under
normal touch
3.1.6
signal-to-noise ratio
SNR
ratio of the required grey level of fingerprint
image to the noise grey level
3.1.7
false reject rate
FRR
proportion of verification transaction with
...