IEC 63145-1-2:2022

IEC 63145-1-2 ®
Edition 1.0 2022-07
INTERNATIONAL
STANDARD
Eyewear display –
Part 1-2: Generic – Terminology

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IEC 63145-1-2 ®
Edition 1.0 2022-07
INTERNATIONAL
STANDARD
Eyewear display –
Part 1-2: Generic – Terminology

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.120 ISBN 978-2-8322-3983-4

– 2 – IEC 63145-1-2:2022 © IEC 2022
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
3.1 General . 5
3.2 Classification of terms . 5
3.3 Display types . 6
3.4 Computer-generated visual environment . 8
3.5 Display optical system and related terms . 9
3.6 Optical performance related terms . 11
3.7 Performance characteristics . 12
3.8 Visual ergonomics. 13
3.9 Display electronics and related terms . 14
3.10 Terms related to image rendering . 14
Bibliography . 20

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
EYEWEAR DISPLAY –
Part 1-2: Generic – Terminology

FOREWORD
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IEC 63145-1-2 has been prepared by IEC technical committee TC 110: Electronic displays. It
is an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
110/1432/FDIS 110/1443/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/standardsdev/publications.

– 4 – IEC 63145-1-2:2022 © IEC 2022
A list of all parts in the IEC 63145 series, published under the general title Eyewear display,
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• withdrawn,
• replaced by a revised edition, or
• amended.
EYEWEAR DISPLAY –
Part 1-2: Generic – Terminology

1 Scope
This part of IEC 63145 provides terms that are used in the field of eyewear displays for
augmented reality, virtual-reality, mixed reality, and the image or video rendering on these
displays.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
3.1 General
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.2 Classification of terms
Terms for eyewear displays, their optical systems, and image rendering are classified as follows:
• display types (3.3)
• computer-generated visual environment (3.4)
• display optical system and related terms (3.5)
• optical performance related terms (3.6)
• performance characteristics (3.7)
• visual ergonomics (3.8)
• display electronics and related terms (3.9)
• terms related to image rendering (3.10)

– 6 – IEC 63145-1-2:2022 © IEC 2022
3.3 Display types
3.3.1
eyewear display
EWD
display that is worn on the user’s eye or worn close to the eye in order to provide dynamically
addressable visual information to the user
Note 1 to entry: Detailed explanations are given in IEC TR 63145-1-1:2018, 4.1 [1]1.
Note 2 to entry: Eyewear displays include spectacle-mounted, head-mounted and contact lens displays.
Note 3 to entry: The head-mounted display is usually referred to as a headwear. In a few cases, HMD is used for
“helmet-mounted display” or “head-mounted device”.
Note 4 to entry: There are several mount types: head mount, helmet mount, headset, goggle, visor and devices
with similar applications, etc. See IEC TR 63145-1-1:2018, Clause 4 [1].
3.3.2
contact lens display
eyewear display that is worn on the user’s cornea in the same way as a contact lens
3.3.3
virtual-image display
device that optically or holographically forms a virtual-image
Note 1 to entry: In ISO 9241-302:2008 [4], 3.4.52, “virtual-image display” is defined as “device that optically or
holographically forms a virtual-image”; however in this definition “a virtual-image” is ambiguous (see 3.5.1
“virtual-image optical system”).
[SOURCE: ISO 9241-302:2008 [4], 3.4.52, modified – a note has been added.]
3.3.4
head-mounted display
HMD
eyewear display that is mounted on the user’s head, using a mechanical support other than a
spectacle frame
3.3.5
see-through
superimposition of an image(s) or a video onto the whole or part of the user’s real-world field
of view
Note 1 to entry: The superposition is achieved by means of a partially transmissive or reflective optical element.
[SOURCE: ISO 9241-302:2008 [4], 3.5.45, modified – “or a video”, “the whole or part of” and
“real-world” have been added to the definition and a note has been added.]
3.3.6
optical see-through display
transmission or projection virtual-image display that the user can see through in at least part of
the user's real-world field of view
___________
Numbers in square brackets refer to the Bibliography.

3.3.7
video see-through display
immersive HMD that provides a display that combines a video camera view of the real-world
with overlaid computer-generated visual information
Note 1 to entry: See 3.4.7 for the meaning of “immersive”.
3.3.8
monocular display device
device in which the virtual-image is visible to a single eye
[SOURCE: ISO 9241-302:2008 [4], 3.5.38, modified – in the definition, the term “virtual” has
been added and “one eye” has been replaced with “a single eye”.]
3.3.9
binocular display device
device in which different displays or parts of the display are presented to the left and right eyes
via different optical axes
Note 1 to entry: In the context of eyewear displays, the term relates to virtual-image creation due to the close
proximity of the source from the eye.
Note 2 to entry: The binocular display device is sometimes called a dual-view display device.
Note 3 to entry: The images displayed can be the same (as in a single-view binocular display device) or slightly
different, e.g., to provide a stereoscopic view
[SOURCE: ISO 9241-302:2008 [4], 3.5.5, modified – the sentence "a slightly different image of
the same target is " is changed to "different displays or parts of the display are”, and the phrase
"via different optical axes" and the notes have been added.]
3.3.10
single-view binocular display device
device in which the same or slightly different virtual-images are presented to the left and right
eyes via different optical systems
3.3.11
bi-ocular display device
device in which the same image is presented to the left an
...