GB/T 42976-2023 (English Version)

Standard No.: GB/T 42976-2023
Language: Chinese, Available in English version
Release Date: 2023
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 42976-2023

Scope: This document describes the test method for the optical properties of quantum dot light conversion films, including the principle of the method, instruments and equipment, test samples, test procedures, data processing, test reports, etc. This document is applicable to the measurement of the optical properties of quantum dot light conversion films for liquid crystal display devices, and the measurement of the optical properties of other types of light conversion films is carried out by reference.

Introduction

Analysis of the core content of the standard

GB/T 42976-2023 is my country's first special test standard for quantum dot light conversion films. It systematically standardizes the performance indicators (wavelength error ≤ 0.5nm) and the nine-equal-division measurement method of key equipment such as spectral radiance meter, and realizes the accurate calculation of light conversion efficiency through the photon number integral formula:

$$ n=\frac{1}{h\times c}{\int}_{\lambda_{1}}^{\lambda_{2}}S(\lambda)\times\lambda\mathrm{d}\lambda $$

Comparison of key technical parameters

Parameter type	Test method	Allowable fluctuation range	Core equipment
Brightness uniformity	Nine-point measurement method	≤2%	Spectral radiance meter
Chromaticity non-uniformity	CIE1931 chromaticity coordinates	Δxy≤0.002	Color luminance meter
Light conversion efficiency	Photon number integration method	±1.5%	Integrating sphere system

Key points for test platform construction

The standard requires that the test platform must meet the following requirements:

Ambient temperature 23±5℃, humidity 25%-85%
The backlight source uses 447.5±2.5nm blue light LED
Sample size ≥18cm×18cm, parallel samples ≥3 pieces
No-load brightness uniformity ≥90%

The example shows: In the test of 55-inch quantum dot film, the measured brightness uniformity reached 88%, and the light conversion efficiency was 62.5%, which met the standard requirements.

Industrial Application Value

This standard solves the three major pain points in the quantum dot display industry chain:

It unifies the measurement benchmark for light conversion efficiency
It standardizes the test methods for key parameters such as haze (≤5%)
It establishes a full-chain evaluation system from materials to modules

GB/T 42976-2023 Referenced Document

GB 19510.1-2009 Lamp controlgear-Part 1:General and safety requirements
GB/T 20147 CIE standard colorimetric observers
GB/T 2410 Determination of light transmittance and haze of transparent plastics
GB/T 37664.1-2019 Nanomanufacturing—Key control characteristics—Luminescent nanomaterials—Part 1:Quantum efficiency

GB/T 42976-2023 history

2023 GB/T 42976-2023 Nanotechnology nano-photoelectric display quantum dot light conversion film optical performance testing method