ASTM F2771-10(2016)
(Test Method)Standard Test Method for Determining the Luminance Curve of an Electroluminescent Lamp at Ambient Conditions (Withdrawn 2023)
Standard Test Method for Determining the Luminance Curve of an Electroluminescent Lamp at Ambient Conditions (Withdrawn 2023)
SIGNIFICANCE AND USE
5.1 To provide a standardized test method that can be used for a valid comparison of luminance time curves, color changes and cosmetic changes between lamps of various designs, fabrication techniques, and sources.
SCOPE
1.1 This test method establishes the procedures for determining the visible performance change, which is defined by luminance, color and cosmetic appearance of an electroluminescent lamp during operation over an extended time.
1.2 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.
WITHDRAWN RATIONALE
This test method establishes the procedures for determining the visible performance change, which is defined by luminance, color and cosmetic appearance of an electroluminescent lamp during operation over an extended time.
Formerly under the jurisdiction of Committee F01 on Electronics, this test method was withdrawn in November 2023. This standard is being withdrawn without replacement because Committee F01 was disbanded.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: F2771 − 10 (Reapproved 2016)
Standard Test Method for
Determining the Luminance Curve of an Electroluminescent
Lamp at Ambient Conditions
This standard is issued under the fixed designation F2771; 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.
1. Scope to escape. Application of an ac voltage across the electrodes
generates a charging field within the phosphor, which causes it
1.1 This test method establishes the procedures for deter-
to emit light.
mining the visible performance change, which is defined by
luminance, color and cosmetic appearance of an electrolumi- 3.1.4 time to half luminance (THL), n—the elapsed operat-
nescent lamp during operation over an extended time. ing time over which the luminance of a lamp maintained under
constant power conditions is reduced to 50 % of its initial
1.2 This standard does not purport to address all of the
value.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3.1.5 membrane switch, n—a momentary switching device,
priate safety and health practices and determine the applica-
in which at least one contact is on, or made of, a flexible
bility of regulatory limitations prior to use.
substrate.
2. Referenced Documents
4. Summary of Test Method
2.1 ASTM Standards:
4.1 This test method includes an initial measurement of the
F1595 Practice forViewing Conditions forVisual Inspection
luminance, color, and appearance of a lamp when powered
of Membrane Switches
with a specified voltage source. After initial characterization,
F2359 Test Method for Determining Color of a Membrane
the lamp is maintained under the same power conditions for an
Switch Backlit with Diffuse Light Source
extended interval in a controlled environment designed to
F2360 Test Method for Determining Luminance of a Mem-
interfere minimally with the operating characteristics of the
brane Switch Backlit with Diffuse Light Source
lamp. The luminance, color and appearance of the lamps under
test are measured and recorded at a predetermined schedule
3. Terminology
throughout the test (initially the intervals are shorter to capture
the rapid rate of change and longer as the test progresses). One
3.1 Definitions:
3.1.1 luminance, n—measure of the brightness or luminous output of the measurement is to identify the time of operation
by which the measured luminance is reduced to half that
intensity of light, usually expressed in units of candelas per
2 2
square metre (cd/m ) or foot lamberts. 1 fL = 3.426 cd/m . recorded at the initial characterization.
3.1.2 luminance curve, n—a graphical representation of the
5. Significance and Use
variation of luminance with time (implicitly under unvarying
operating conditions).
5.1 To provide a standardized test method that can be used
foravalidcomparisonofluminancetimecurves,colorchanges
3.1.3 electroluminescent lamp (EL lamp), n—essentially a
and cosmetic changes between lamps of various designs,
capacitor structure with phosphor and a dielectric sandwiched
fabrication techniques, and sources.
between electrodes, one of which is transparent to allow light
6. Interferences
This test method is under the jurisdiction of ASTM Committee F01 on
6.1 Humidity—Performance characteristics can be skewed
Electronics and is the direct responsibility of Subcommittee F01.18 on Printed
with the change of humidity.
Electronics.
Current edition approved May 1, 2016. Published May 2016. Originally
6.2 Temperature—Performance characteristics can be
approved in 2009. Last edition approved in 2010 as F2771 - 10. DOI: 10.1520/
skewed with the change of temperature.
F2771-10R16.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.3 Power—Performance characteristics can be skewed
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
with variations in the voltage, frequency and waveform of the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. power applied to the lamp.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F2771 − 10 (2016)
7. Apparatus uniformity is sufficient (any such change should be reported in
the results), or (c) cancel the measurement series and begin test
7.1 Power source capable of providing an appropriate ac
again with a new sample. It is recommended that the entire
voltage, frequency and waveform. For example, operation at
series of measurements be made without the inclusion of a
110 6 3 VRMS, at 400 6 10 Hz, square wave which is
discrete blemish in the measurement area.
prevalent in the industry.
11.2.4 Measure and record luminance and color of the
7.2 Luminance measurement equipment as specified in Test
lamps per Test Methods F2360 and F2359 regularly. Before
Method F2360.
each measu
...
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: F2771 − 10 (Reapproved 2016)
Standard Test Method for
Determining the Luminance Curve of an Electroluminescent
Lamp at Ambient Conditions
This standard is issued under the fixed designation F2771; 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.
1. Scope to escape. Application of an ac voltage across the electrodes
generates a charging field within the phosphor, which causes it
1.1 This test method establishes the procedures for deter-
to emit light.
mining the visible performance change, which is defined by
luminance, color and cosmetic appearance of an electrolumi- 3.1.4 time to half luminance (THL), n—the elapsed operat-
nescent lamp during operation over an extended time. ing time over which the luminance of a lamp maintained under
constant power conditions is reduced to 50 % of its initial
1.2 This standard does not purport to address all of the
value.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3.1.5 membrane switch, n—a momentary switching device,
priate safety and health practices and determine the applica-
in which at least one contact is on, or made of, a flexible
bility of regulatory limitations prior to use.
substrate.
2. Referenced Documents
4. Summary of Test Method
2.1 ASTM Standards:
4.1 This test method includes an initial measurement of the
F1595 Practice for Viewing Conditions for Visual Inspection
luminance, color, and appearance of a lamp when powered
of Membrane Switches
with a specified voltage source. After initial characterization,
F2359 Test Method for Determining Color of a Membrane
the lamp is maintained under the same power conditions for an
Switch Backlit with Diffuse Light Source
extended interval in a controlled environment designed to
F2360 Test Method for Determining Luminance of a Mem-
interfere minimally with the operating characteristics of the
brane Switch Backlit with Diffuse Light Source
lamp. The luminance, color and appearance of the lamps under
test are measured and recorded at a predetermined schedule
3. Terminology
throughout the test (initially the intervals are shorter to capture
3.1 Definitions: the rapid rate of change and longer as the test progresses). One
output of the measurement is to identify the time of operation
3.1.1 luminance, n—measure of the brightness or luminous
intensity of light, usually expressed in units of candelas per by which the measured luminance is reduced to half that
2 2
recorded at the initial characterization.
square metre (cd/m ) or foot lamberts. 1 fL = 3.426 cd/m .
3.1.2 luminance curve, n—a graphical representation of the
5. Significance and Use
variation of luminance with time (implicitly under unvarying
operating conditions).
5.1 To provide a standardized test method that can be used
for a valid comparison of luminance time curves, color changes
3.1.3 electroluminescent lamp (EL lamp), n—essentially a
and cosmetic changes between lamps of various designs,
capacitor structure with phosphor and a dielectric sandwiched
fabrication techniques, and sources.
between electrodes, one of which is transparent to allow light
6. Interferences
This test method is under the jurisdiction of ASTM Committee F01 on
6.1 Humidity—Performance characteristics can be skewed
Electronics and is the direct responsibility of Subcommittee F01.18 on Printed
with the change of humidity.
Electronics.
Current edition approved May 1, 2016. Published May 2016. Originally
6.2 Temperature—Performance characteristics can be
approved in 2009. Last edition approved in 2010 as F2771 - 10. DOI: 10.1520/
skewed with the change of temperature.
F2771-10R16.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.3 Power—Performance characteristics can be skewed
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
with variations in the voltage, frequency and waveform of the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. power applied to the lamp.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F2771 − 10 (2016)
7. Apparatus uniformity is sufficient (any such change should be reported in
the results), or (c) cancel the measurement series and begin test
7.1 Power source capable of providing an appropriate ac
again with a new sample. It is recommended that the entire
voltage, frequency and waveform. For example, operation at
series of measurements be made without the inclusion of a
110 6 3 VRMS, at 400 6 10 Hz, square wave which is
discrete blemish in the measurement area.
prevalent in the industry.
11.2.4 Measure and record luminance and color of the
7.2 Luminance measurement equipment as specified in Test
lamps per Test Methods F2360 and F2359 regularly. Before
Method F2360.
each measurement, verify that the power applied remains
7.3 Color measurement equipment as specified in
...
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