ISO/IEC 21118:2012

Information technology — Office equipment — Information to be included in specification sheets — Data projectors

ISO/IEC 21118:2012 specifies the information to be included in the specification sheets for front projection type data projectors and the form of specification sheets. It is also applicable to data projectors that have a video signal input port as well as a computer signal input port. It is not applicable to units for a rear screen projection or with a video input terminal alone.

Technologies de l'information — Équipements de bureau — Information à inclure dans les feuilles de spécifications — Projecteurs de données

General Information

• Status: Withdrawn
• Publication Date: 03-Dec-2012
• Withdrawal Date: 03-Dec-2012
• ICS: 35.260 - Office machines
• Technical Committee: ISO/IEC JTC 1/SC 28 - Office equipment
• Drafting Committee: ISO/IEC JTC 1/SC 28 - Office equipment
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 03-Feb-2020

Relations

• Revised: ISO/IEC 21118:2020 - Information technology — Office equipment — Information to be included in specification sheets for data projectors
• Effective Date: 14-Oct-2017
• Revises: ISO/IEC 21118:2005 - Information to be included in specification sheets — Data projectors
• Effective Date: 16-Oct-2010

Standards Content (Sample)

INTERNATIONAL ISO/IEC
STANDARD 21118
Second edition
2012-12-01

Information technology — Office
equipment — Information to be included
in specification sheets — Data projectors
Technologies de l'information — Équipements de bureau — Information
à inclure dans les feuilles de spécifications — Projecteurs de données




Reference number
ISO/IEC 21118:2012(E)
©
ISO/IEC 2012

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ISO/IEC 21118:2012(E)

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©  ISO/IEC 2012
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 ISO at the address below or
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Published in Switzerland

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ISO/IEC 21118:2012(E)
Contents Page
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Measuring methods and conditions . 3
5 Items in specification sheets . 3
Annex A (normative) Specification sheets . 7
A.1 General . 7
Annex B (normative) Measuring methods and conditions . 9
B.1 Ambient conditions for measurement . 9
B.2 Light output, contrast ratio (full white/full black), and Center to corner zone ratio
measurement procedures and measuring conditions . 9
B.2.1 Projector adjustment and other conditions . 9
B.2.2 Light output measuring procedure for data projector . 10
B.2.3 Contrast ratio (full white/full black) measuring procedure . 10
B.2.4 Center to corner zone ratio measuring procedure . 11
B.3 Measuring methods and conditions for audio output . 11
B.4 Measuring methods and conditions for acoustic noise/Sound pressure level . 11
B.4.1 Environment condition for acoustic noise measurement . 11
B.4.2 Measuring methods and conditions for acoustic noise . 12
B.5 Maximum power consumption . 13
B.6 Standby mode power consumption . 13
Bibliography . 14

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ISO/IEC 21118:2012(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO/IEC 21118 was prepared by Technical Committee ISO/TC JTC 1, Information technology, Subcommittee
SC 28, Office equipment.
This second edition cancels and replaces the first edition (ISO/IEC 21118:2005), which has been technically
revised.

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INTERNATIONAL STANDARD ISO/IEC 21118:2012(E)

Information technology — Office equipment — Information to
be included in specification sheets — Data projectors
1 Scope
This International Standard specifies the information to be included in the specification sheets for front
projection type data projectors and the form of specification sheets. It is also applicable to data projectors that
have a video signal input port as well as a computer signal input port.
It is not applicable to units for a rear screen projection or with a video input terminal alone.
2 Normative references
The following referenced documents are indispensable for the application 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.
ISO 7779, Acoustics — Measurement of airborne noise emitted by information technology and
telecommunications equipment
ISO 11201, Acoustics — Noise emitted by machinery and equipment — Determination of emission sound
pressure levels at a work station and at other specified positions in an essentially free field over a reflecting
plane with negligible environmental corrections
IEC 61947-1, Electronic projection — Measurement and documentation of key performance criteria — Part 1:
Fixed resolution projectors
IEC 60107-2, Methods of measurement on receivers for television broadcast transmissions — Part 2: Audio
channels — General methods and methods for monophonic channels
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
light valve
light-modulation device (such as a transmissive or reflective liquid crystal display, or a micro mirror device)
used to create an optical image from an external light source that corresponds to an electrical signal
3.2
telephoto end
maximum focal length position of the zoom lens
3.3
wide-angle end
minimum focal length position of the zoom lens
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ISO/IEC 21118:2012(E)
3.4
resize
electronic process which converts an input image from one resolution to a different resolution
3.5
lens shift
vertical or horizontal repositioning of the projection lens relative to the light valve to compensate for projector
to screen alignment differences
3.6
image position
measurement of lens shift
vertical or horizontal distance from the centre of the projected image to the point in which the axis of the
projection lens intersects the screen (expressed as a percentage based on the overall height or width of the
projected image)

NOTE This figure shows an example of the image position with 70 % vertical shift. (20 % + 50 %)
Figure 1 — Example of shifted image position
3.7
front screen projection
image projected on the audience side of a light-reflecting screen
[IEC 61947-1]
3.8
rear screen projection
image projected through a light-transmitting screen to the audience side of the screen
[IEC 61947-1]
3.9
standard outside dimensions
maximum dimensions of the product after removing the packaging, including any protrusions)
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ISO/IEC 21118:2012(E)
4 Measuring methods and conditions
Annex B (normative) describes the measuring methods and conditions in terms of the performance
specification items in Table 1.
5 Items in specification sheets
Table 1 lists the items that should appear in the specification sheets. Items whose properties shall be included
in the specification sheets are marked as “R” (required), while other items whose properties are given for
information are marked as “O” (optional).
Values in the specification of light output, contrast ratio (full white/full black) and Center to corner zone ratio
shall be defined as averages of productions. The lower-limit values of the projector shall be at least 80 % of
the values in specification sheets for these 3 items. The products’ tolerance of lower limit at the time of
shipment shall be clearly stated in the specification sheet.
The specification sheets shall have a statement indicating accordance with this International Standard. The
terminology shown in the “Item” column of Table 1 shall be used in the specification sheets. Items marked as
Optional may be omitted, along with any items that do not apply to the particular projector model. If an item is
omitted; the order of items included in the specification sheets shall maintain the same order as shown in
Table 1.
The form of the specification sheets is given in Annex A (normative).
NOTE The term “Specification Sheets” applies to documents which describe the performance characteristics of the
data projector which may be included in instruction manuals, product catalogues or on websites.
Table 1 — Performance specification item
No. Item R/O Item specification Description example

1 Product number, type name, or R The product name, type name, model numbers,
model number or product numbers shall be indicated.
2 Display system R The light valve type and the display system shall a) LCD, micro mirror, other
be indicated.
b) transmitting, reflecting
c) single panel, 3 panel, other
3 Optical system O The optics for colour separation and a) Dichroic mirror separation-
convergence should be indicated. prism convergence system
b) Time sharing separation/
convergence system
c) other
4 Display device
4.1 Size of effective display area R Diagonal size, number of panels and aspect ratio 33mm × 3 / 1,3” × 3,
shall be indicated.
aspect ratio 4:3
4.2 Number of pixels R Pixel count per display device, pixel dimensions 786 432 pixels (1 024 ×768) ×
and the number of display devices, shall be 3 sheets
indicated.
4.3 Other O Additional features of the display device should without micro lens
be indicated.
5 Projection lens
5.1 Zoom R Zoom magnifications shall be indicated. Power zoom (1,4×)
5.2 Focus R Method of focus adjustment shall be indicated. Manual or powered

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ISO/IEC 21118:2012(E)
Table 1 (continued)
No. Item R/O Item specification Description example
5.3 Lens shift O Image position, fixed/variable, manual/powered Fixed lens shift : xx (%)
should be indicated.
Vertical lens shift range,
Indicate lens shift range, fixed/variable type and
XX%(up)-XX%(down)
manual/powered.
XX%(right)-XX%(left)
Range of single vertical lens shift may be
described as "Lens shift XX% to XX %" (see 3.6)
Image position for fixed lens shift.
Image position for variable shift.
In the case of an optical axis position is
unavailable, an illustration may be used.
5.4 Focal length O f = 52 mm — 73 mm
f/number f/2,5 — 2,9
6 Light source R The light source lamp type (or name), wattage, 300 W high pressure mercury
and quantity shall be indicated. Lamp number lamp
may be omitted if only one lamp is used.
7 Screen size [Projection R The minimum and maximum diagonal sizes of Minimum: 58.4cm / 23 inch to
distance] the projected image shall be indicated. maximum: 762cm / 300 inch
O The associated projection distance should also Projection distance: 1,2 m to
be indicated. For products with an indefinite
11,5 m
measurement, the projection distance should be
indicated using illustrations.
8 Number of colours O The maximum number of reproducible colours 16 700 000 colours
shall be indicated.
9 Light output R The Light output on a projected screen shall be As average value of production
measured and indicated. units.
2 000 lm
(see B.2.2)
10 Contrast ratio (full white/full O The ratio of screen illuminance between the full As average value of production
black) white and full black levels of projected images units
should be indicated. Measurement conditions
2000:1 in high contrast mode for
shall be indicated.
iris ON, standard lens
(see B.2.3)
11 Center to corner zone ratio O The ratio between the center illuminance and 4- As average value of production
peripheral-point average illuminance of a full- units.
white image should be indicated.
85 % (see B.2.4)
12 Speaker R 10 W × 2 stereo (see B.3)
The output power of the speaker shall be
indicated.
O The number of speakers and whether stereo or 2 speakers, stereo
monaural should be indicated as well.
13 Displayable scanning
frequency
13.1 Horizontal R The range of displayable horizontal frequencies 15 kHz to 100 kHz
shall be indicated.
Detail of corresponding frequency may be
indicated in a separate sheet.
13.2 Vertical R The range of displayable vertical frequencies 50 Hz to 120 Hz
shall be indicated.
Detail of corresponding frequency may be
indicated in a separate sheet.

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