GB/T 42977-2023 English PDF (GBT42977-2023)

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GB/T 42977-2023: Nanotechnology - Nano-enabled optoelectrical display - Optical reliability assessment for quantum dot enabled light conversion film
GB/T 42977-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 31.120
CCS G 31
Nanotechnology - Nano-enabled optoelectrical display -
Optical reliability assessment for quantum dot enabled light
conversion film
ISSUED ON. SEPTEMBER 07, 2023
IMPLEMENTED ON. APRIL 01, 2024
Issued by. State Administration for Market Regulation;
National Standardization Administration.
Table of Contents
Foreword... 3
Introduction... 4
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 6
4 Instruments and equipment... 6
5 Optical reliability test conditions... 9
6 Test samples... 10
7 Optical reliability test operation procedure... 11
8 Optical performance test method and data processing... 11
9 Optical reliability judgment index... 14
10 Measurement uncertainty... 15
11 Test report... 15
Appendix A (Informative) Optical reliability test report template... 17
References... 18
Nanotechnology - Nano-enabled optoelectrical display -
Optical reliability assessment for quantum dot enabled light
conversion film
1 Scope
This document provides a method for measuring the optical reliability and reliability
judgment indicators of quantum dot enabled light conversion film (Q-LCF).
This document is applicable to the optical reliability measurement of quantum dot
enabled light conversion film for liquid crystal display devices; other film materials
with light conversion function shall use this standard as a reference.
2 Normative references
The contents of the following documents constitute essential clauses of this document
through normative references in the text. Among them, for dated references, only the
version corresponding to that date applies to this document; for undated references, the
latest version (including all amendments) applies to this document.
GB/T 2423.1 Environmental testing for electric and electronic products - Part 2.Test
methods - Tests A. Cold
GB/T 2423.2 Environmental testing for electric and electronic products - Part 2.Test
methods - Tests B. Dry heat
GB/T 2423.3 Environmental testing - Part 2.Testing method - Test Cab. Damp heat,
steady state
GB/T 2423.22 Environmental testing - Part 2.Test methods - Test N. Change of
temperature
GB 19510.1-2009 Controlgear for electric light sources - Part 1.General and safety
requirements
GB/T 42976-2023 Nanotechnology - Nano-enabled optoelectrical display -
Measurement of optical performance for quantum dot enabled light conversion film
3 Terms and definitions
The terms and definitions as defined in GB/T 42976-2023, as well as the following
terms and definitions, apply to this document.
3.1
Optical reliability
The ability of a product to achieve specified optical performance under specified
conditions and within a specified time.
[Source. GB/T 33721-2017, 3.2, modified]
3.2
Invalid edge
The edge area where the quantum dot enabled light conversion film fails due to
obvious optical performance degradation.
4 Instruments and equipment
4.1 Reliability test platform equipment
4.1.1 Overview
The optical reliability test of the quantum dot enabled light conversion film is divided
into illumination test and storage test, according to the conditions of accelerated aging
test with or without light irradiation. The illumination test is carried out on the
illumination test platform; the storage test is carried out on the storage test platform.
4.1.2 Illumination test platform
4.1.2.1 Structure
The structure of the illumination test platform is as shown in Figure 1, which consists
of a brightness enhancement film, a sample stage, a backlight system. The brightness
enhancement film, the sample stage, the backlight system are stacked from top to
bottom and have the same normal line.
4.2.3 Hot-cold shock test chamber. Temperature range is -40 °C ~ 100 °C; temperature
accuracy is ≤ 1 °C; the use of the test chamber shall comply with the requirements of
GB/T 2423.22.
4.2.4 Constant temperature and humidity test chamber. Temperature range is 0 °C ~
100 °C; temperature accuracy is ≤ 1 °C; the maximum humidity test range covers at
least 98% relative humidity, at a relative humidity accuracy of ≤ 5%; the use of the test
chamber shall comply with the requirements of GB/T 2423.3.
4.2.5 Room temperature test chamber. It shall be a dark chamber; the illumination
inside the chamber is ≤ 0.1 lx. The atmospheric pressure and temperature inside the
chamber are consistent with those in the storage room. The temperature is required to
be constant at 23 °C ± 2 °C and the relative humidity is 50% ± 10%.
4.3 Optical performance test platform
The optical performance test platform shall meet the requirements of GB/T 42976-2023.
4.4 Film ruler
The film ruler, which has a measuring range of 100 mm or larger and a minimum scale
of ≤ 0.1 mm.
4.5 Optical microscope
The optical microscope shall have its own light source and the test accuracy shall be ≤
0.1 mm.
5 Optical reliability test conditions
5.1 Test type and cycle
The optical reliability test of quantum dot enabled light conversion film can be divided
into constant condition aging test and periodic cycle test. The test cycle of the constant
condition aging test is set according to the accelerated aging test conditions and reached
an agreement with the user. The conventional constant condition aging test cycle should
be 1000 h. The periodic cycle aging test is usually a cold and hot shock test, which
should be carried out 100 cycles.
Note. Only one type of aging test condition is tested for a single sample. If other aging tests are
added, the initial sample that has not undergone reliability tests needs to be taken.
5.2 Accelerated aging test conditions
5.2.1 Constant temperature aging test
The constant temperature aging test determines the optical reliability of the quantum
dot enabled light conversion film, by setting a single acceleration factor of temperature.
It is divided into low temperature test and high temperature test. The low temperature
test is carried out in a low temperature test chamber (4.2.2). The temperature in the
chamber shall be set to -40 °C. The high temperature test is carried out in a high
temperature test chamber (4.2.1). The conventional high temperature test temperature
shall be set to 65 °C. The test conditions can also be negotiated with the user.
5.2.2 Constant temperature and humidity aging test
The constant temperature and humidity aging test determines the optical reliability of
the quantum dot enabled light conversion film, by setting a double acceleration factor
of temperature and humidity. The constant temperature and humidity aging test is
carried out in a constant temperature and humidity test chamber (4.2.4). The
conventional constant temperature and humidity test temperature should be set to 60 °C;
the humidity shall be set to 90% relative humidity. It should not exceed 65 °C and 95%
relative humidity. The test conditions can also be negotiated with the user.
5.2.3 Cold-hot shock aging test
The cold-hot shock aging test determines the optical reliability of the quantum dot
enabled light conversion film, by setting the temperature acceleration factor. It is carried
out in a thermal shock test chamber (4.2.3). The low temperature condition should be
set to -40 °C; the ...