ASTM E1455-16
(Practice)Standard Practice for Obtaining Colorimetric Data from a Visual Display Unit Using Tristimulus Colorimeters
Standard Practice for Obtaining Colorimetric Data from a Visual Display Unit Using Tristimulus Colorimeters
SIGNIFICANCE AND USE
5.1 This practice may be applied when tristimulus colorimeters are used to measure the colors produced on self-luminous video display devices such as CRTs and flat-panel displays, including electroluminescent (EL) panels, light emitting diodes (LEDs) field emission displays (FEDs), and back-lit liquid crystal displays (LCDs). This practice is not meant to be a complete description of a procedure to measure the color coordinates of a display. Rather, it provides a method for obtaining more accurate results when certain conditions are met. It may be used by any person engaged in the measurement of color on display devices who has access to the requisite equipment.
5.2 This practice defines a class of tristimulus colorimeters that may be said to be compatible with this practice.
SCOPE
1.1 This practice is intended as an aid for improving the accuracy of colorimetric measurements made with tristimulus colorimeters on visual display units, such as cathode ray tubes (CRTs) and self-luminous flat-panel displays. It explains a useful step in the analysis of colorimetric data that takes advantage of the fact that light from such displays consists of an additive mixture of three primary colored lights. However, it is not a complete specification of how such measurements should be made.
1.2 This practice is limited to display devices and colorimetric instruments that meet linearity criteria as defined in the practice. It is not concerned with effects that might cause measurement bias such as temporal or geometric differences between the instrument being optimized and the instrument used for reference.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: E1455 − 16
Standard Practice for
Obtaining Colorimetric Data from a Visual Display Unit
1
Using Tristimulus Colorimeters
This standard is issued under the fixed designation E1455; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
This practice provides directions for correcting the results obtained with tristimulus colorimeters
when measuring the tristimulus values or chromaticity coordinates of colored displays. Tristimulus
colorimeters approximate the CIE color matching functions x¯(λ), y¯(λ), z¯(λ) to make these measure-
ments. The errors generated in measuring colors on a display may be minimized using this practice.
1. Scope E1336 Test Method for Obtaining Colorimetric Data From a
Visual Display Unit by Spectroradiometry
1.1 This practice is intended as an aid for improving the
E1341 Practice for Obtaining Spectroradiometric Data from
accuracy of colorimetric measurements made with tristimulus
Radiant Sources for Colorimetry
colorimeters on visual display units, such as cathode ray tubes
2.2 ISO/CIE Standard:
(CRTs) and self-luminous flat-panel displays. It explains a
ISO 11664–1:2007(E)/CIE S 014–1/E:2006 Joint Standard
useful step in the analysis of colorimetric data that takes
ISO/CIE Standard: Colorimetry Part 1 – CIE Standard
advantage of the fact that light from such displays consists of
3
Colorimetric Observers
an additive mixture of three primary colored lights. However,
it is not a complete specification of how such measurements
3. Terminology
should be made.
3.1 Definitions—Unless otherwise stated, definitions of ap-
1.2 This practice is limited to display devices and colori-
pearance terms in Terminology E284 are applicable to this
metric instruments that meet linearity criteria as defined in the
practice.
practice. It is not concerned with effects that might cause
measurement bias such as temporal or geometric differences 3.2 Definitions of Terms Specific to This Standard:
between the instrument being optimized and the instrument 3.2.1 calibration, n—in reference to a tristimulus
used for reference. colorimeter, the process performed outside of this practice to
adjust the tristimulus colorimeter to provide the best possible
1.3 This standard does not purport to address all of the
results for average or predefined conditions.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- 3.2.2 optimization, n—in reference to a tristimulus
colorimeter, the process performed pursuant to this practice to
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. adjust the tristimulus colorimeter or to interpret its readings to
provide better results when applied to a particular display
2. Referenced Documents
device.
2
2.1 ASTM Standards: 3.2.3 compatible, adj—in reference to a tristimulus
E284 Terminology of Appearance
colorimeter, one so designed as to automate the procedure
described in this practice.
1
This practice is under the jurisdiction of ASTM Committee E12 on Color and
4. Summary of Practice
Appearance and is the direct responsibility of Subcommittee E12.06 on Display,
4.1 Tristimulus colorimeters comprised of three or four
Imaging and Imaging Colorimetry.
Current edition approved July 1, 2016. Published August 2016. Originally
detector channels are, in general, not amenable to accurate
approved in 1992. Last previous edition approved in 2010 as E1455 – 03 (2010).
calibration that holds for all manner of usage with different
DOI: 10.1520/E1455-16.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Currently available from CIE (Commission International on Illumination),
the ASTM website. http://www.techstreet.com.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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E1455 − 16
illuminated devices and objects. This is because the spectral ISO 11664–1:2007(E)/CIE S 014–1E:2006 and the CIE in its
4
responsivities of their detector channels do not exactly match publication Publ. 015(1). For light with a color stimulus
function Φ(λ),
the defined Commission Internationale de L’Éclairage (CIE)
830 nm
x¯(λ), y¯(λ), z¯(λ) functions. Factory or subsequent calibration
reflects judgments and compromises that may not be readily X 5 k * Φ~λ!x¯~λ!dλ (1)
360 nm
apparent.
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: E1455 − 03 (Reapproved 2010) E1455 − 16
Standard Practice for
Obtaining Colorimetric Data from a Visual Display Unit
1
Using Tristimulus Colorimeters
This standard is issued under the fixed designation E1455; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
This practice provides directions for correcting the results obtained with tristimulus colorimeters
when measuring the tristimulus values or chromaticity coordinates of colored displays. Tristimulus
colorimeters approximate the CIE color matching functions x¯(λ),(λ), y¯(λ),(λ), z¯(λ)(λ) to make these
measurements. The errors generated in measuring colors on a display may be minimized using this
practice.
1. Scope
1.1 This practice is intended as an aid for improving the accuracy of colorimetric measurements made with tristimulus
colorimeters on visual display units, such as cathode ray tubes (CRTs) and self-luminous flat-panel displays. It explains a useful
step in the analysis of colorimetric data that takes advantage of the fact that light from such displays consists of an additive mixture
of three primary colored lights. However, it is not a complete specification of how such measurements should be made.
1.2 This practice is limited to display devices and colorimetric instruments that meet linearity criteria as defined in the practice.
It is not concerned with effects that might cause measurement bias such as temporal or geometric differences between the
instrument being optimized and the instrument used for reference.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
E284 Terminology of Appearance
E1336 Test Method for Obtaining Colorimetric Data From a Visual Display Unit by Spectroradiometry
E1341 Practice for Obtaining Spectroradiometric Data from Radiant Sources for Colorimetry
2.2 ISO/CIE Standard:
CIE Standard Colorimetric Observers, ISO/CIE 10527:ISO 11664–1:2007(E)/CIE S 014–1/E:2006 1991 (E) (International
Organization for Standardization, Geneva, 1991)Joint Standard ISO/CIE Standard: Colorimetry Part 1 – CIE Standard
3
Colorimetric Observers
3. Terminology
3.1 Definitions—Unless otherwise stated, definitions of appearance terms in Terminology E284 are applicable to this practice.
3.2 Definitions of Terms Specific to This Standard:
1
This practice is under the jurisdiction of ASTM Committee E12 on Color and Appearance and is the direct responsibility of Subcommittee E12.06 on Display, Imaging
and Imaging Colorimetry.
Current edition approved March 1, 2010July 1, 2016. Published March 2010August 2016. Originally approved in 1992. Last previous edition approved in 20032010 as
E1455 – 03.E1455 – 03 (2010). DOI: 10.1520/E1455-03R10.10.1520/E1455-16.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Currently available through the U.S. National Committee of the CIE, c/o Mr. Thomas M. Lemons, TLA-Lighting Consultants, Inc., 7 Pond Street, Salem, MA
01970-4819. Also included in from CIE (Commission International ASTM Standards on Color and Appearance,on Illumination), http://www.techstreet.com. Fifth Edition,
1996.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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E1455 − 16
3.2.1 calibration, n—in reference to a tristimulus colorimeter, the process performed outside of this practice to adjust the
tristimulus colorimeter to provide the best possible results for average or predefined conditions.
3.2.2 optimization, n—in reference to a tristimulus colorimeter, the process performed pursuant to this practice to adjust the
tristimulus colorimeter or to interpret its readings to provide better results when applied to a particular display device.
3.2.3 compatible, adj—in reference to a tristimulus colorimeter, one so designed as to automate the procedure descri
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