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GB/T 42977-2023: Nanotechnology - Nano-enabled optoelectrical display - Optical reliability assessment for quantum dot enabled light conversion film Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 42977-2023: Nanotechnology - Nano-enabled optoelectrical display - Optical reliability assessment for quantum dot enabled light conversion film---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT42977-2023 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 ContentsForeword... 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 film1 ScopeThis 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 referencesThe 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 film3 Terms and definitionsThe 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 equipment4.1 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 conditions5.1 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 high temperature test condition should be set to 85 °C; the transition temperature in the cycle should be set to 25 °C. The maintenance time of a single cycle of high and low temperature test should be 30 minutes; the single heating/cooling time should be less than 5 minutes. The test conditions can also be negotiated with the user. 5.2.4 Light aging test The light aging test can be divided into high temperature light aging test and constant temperature and humidity light aging test. The light test platform (4.1.2) is placed in an appropriate test chamber (4.2) for the test. The temperature conditions of the high temperature light aging test are set according to 5.2.1; the temperature and humidity conditions of the constant temperature and humidity light aging test are set according to 5.2.2.The lighting conditions are set according to the average irradiance on the surface directly exposed to light of the test sample, which should be selected from Table 1. The temperature of the light aging test condition should be 40 °C; the humidity shall be 85% relative humidity; the light intensity should be the light source component 1 in Table 1.6 Test samplesQuantum dot enabled light conversion film test samples shall be selected from products 8.1.2 Test nodes During the optical reliability test, the changes in optical performance shall be recorded. The test nodes shall be 0 h, 24 h, 72 h, 168 h, 336 h, 504 h, 1000 h, 2000 h, 3000 h. The test node setting can also be negotiated with the user. 8.2 Test method 8.2.1 Optical performance test Based on the contents of Chapter 8 and Chapter 9 of GB/T 42976-2023, test brightness L, chromaticity coordinates (x, y), light conversion efficiency LCE. 8.2.2 Invalid edge test 8.2.2.1 Overview After the quantum dot enabled light conversion film has been subjected to the accelerated aging test, the maximum invalid edge can be tested as one aspect of optical reliability evaluation. The invalid edge test method can be divided into the optical microscope test method and the film ruler test method. 8.2.2.2 Optical microscope to measure the maximum invalid edge The optical microscope test steps are as follows. a) Place the test sample flat on the stage of the optical microscope; fix it; b) Find the edge area of the test sample in the field of view; select an objective lens with a suitable magnification; take an image after focusing clearly; c) Measure the maximum width of the invalid edge on the edge of the sample in the image; d) Select more than 3 different areas on the edge of the sample, to repeat the above steps; obtain the maximum value, which is recorded as the maximum invalid edge d of the sample. 8.2.2.3 Film ruler to measure the maximum invalid edge The film ruler test steps are as follows. a) Place the quantum dot enabled light conversion film test sample flat on the stage; b) Irradiate the sample with an ultraviolet light source (see Figure 2); the peak wavelength of the ultraviolet light source should be 395 nm ~ 415 nm; c) Invalid edges can be seen on the edges of the sample with the naked eye; use a10 Measurement uncertaintyDepending on the instrument, experimental conditions, testing personnel's operating specifications, the uncertainty of the optical reliability measurement of quantum dot enabled light conversion film varies to a certain extent. In order to provide an appropriate test background, an uncertainty assessment shall be given in the test report. Identify the important sources of uncertainty (Type A uncertainty and Type B uncertainty) for the various test methods in this document in order of importance. The report should include the evaluation of Type A and Type B uncertainty and how they are combined to give the total expanded uncertainty of the measurement. Any change in the experimental steps changes the composition of the uncertainty. Once the measurement steps are changed, the uncertainty evaluation shall be reviewed. The uncertainty of light conversion efficiency can be found in Chapter 7 of GB/T 37664.1-2019.11 Test reportThe test report shall include but is not limited to the following. a) The standard number based on which the test is based; b) The name and number of the test sample; c) The type, specification, quantity of the test sample; d) The model of the test instrument and equipment; e) Standard measurement conditions and standard setting conditions (test conditions of instruments and equipment); f) Chromaticity and brightness test results; g) Light conversion efficiency test results; h) Maximum invalid edge test results; i) Standard test environment conditions (temperature, humidity, darkroom); j) Test laboratory; k) Test personnel. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. |
