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GB/T 44390-2024Print display—Measuring method of film uniformity (English PDF)

打印显示薄膜均匀性测试方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

August 23, 2024

Implementation date

March 1, 2025

Scope

GB/T 44390-2024 is the English-translated version of 打印显示薄膜均匀性测试方法.

GB/T 44390-2024 is the Chinese national standard covering the thickness uniformity of a printed display film — the stylus profiler method, the arbitration method when two measurements disagree, and the white light interferometer method, each with its principle, test conditions, measuring steps and result processing; uniformity is taken within a sub-pixel, between adjacent sub-pixels of one colour where the nozzle shows up, and over a short range, on films 5 nm to 105 nm thick. Sub-pixel uniformity follows the ink, the defining layer and the drying, while the adjacent sub-pixel figure follows the nozzle, so the two numbers point at different parts of the printer. First edition, in force from 1 March 2025. Issued on 23 August 2024, it has been in force since 1 March 2025.

Document preview — GB/T 44390-2024

National Standard of the People's Republic of China

ICS: 31.030
Classification: L 90

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

PrefaceIII
1 Scope1
2 Normative references1
3 Terms and Definitions1
4 Step meter method (arbitration method)2
4.1 Test Principle2
4.2 Test Condition2
4.3 Test Step4
4.4 Result processing6
5 White light interferometer method7
5.1 Test Principle7
5.2 Test conditions7
5.3 Test Step9
5.4 Result Processing10
6 Test Report11

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document was proposed and coordinated by the National Technical Committee for Semiconductor Equipment and Materials Standardization (SAC/TC203).

This document was drafted by: BOE Technology Group Co., Ltd., Aoled (Shanghai) Optoelectronic Materials Technology Co., Ltd., Beijing Dingcai Technology Co., Ltd., China Electronics Technology Standardization Institute, Hefei BOE Zhuoyin Technology Co., Ltd., Hefei Dingcai Technology Co., Ltd., TCL Huaxing Optoelectronics Technology Co., Ltd., Jiangyin Runma Electronic Materials Co., Ltd., Guangdong Dongyi New Materials Technology Co., Ltd., Guangdong Ju Hua Printing Display Technology Co., Ltd., Shenzhen Yuguang New Materials Co., Ltd., Quzhou Inter Polymer Materials Co., Ltd., Shaoxing Xuyuan New Materials Technology Co., Ltd.

The main drafters of this document are: Zhang Zhigang, Yang Jinglong, Li Xinguo, Xu Xiaoguang, Ma Xiaoyu, Dai Qing, Bi Yan, Sun Li, Shi Huaiting, Huang Yu, Cao Kewei, Wu Yiran, Zhao Junsha, Wang Kang, Wang Tie, Bao Jinbao, Qiao Juan, Gao Wenzheng, Ge Yeming, He Ke, Zhou Hui, Chen Jianping, Fu Dong, Yu Lei, Huang Weidong, Zhu Longshan, Yuan Peng, and Wang Xia.

Printing display film uniformity test method

1 Scope

This document describes the test method for the uniformity of printed display films, mainly including sub-pixel uniformity, adjacent sub-pixel uniformity, short-range uniformity, Uniformity test method.

This document is applicable to the use of probe-type surface profilers (hereinafter referred to as step profilers) and white light interferometers to measure the thickness of the surface of the sample with a range of 5nm to 105nm.

A print showing the film uniformity test.

2 Normative references

GB/T 20871.12

3 Terms and definitions

The terms and definitions defined in GB/T 20871.12 and the following apply to this document.

3.1 pixel

In a matrix display, the smallest display unit that can perform the necessary display functions.

NOTE For example, in a color display based on red, green, and blue (RGB) vertical stripes, three adjacent RGB dots form a pixel.

[Source. GB/T 20871.12-2024, 3.5.45]

3.2 Subpixel

The individual dots that make up a pixel.

NOTE For example, in a color display based on RGB vertical stripes, each RGB dot is a sub-pixel.

[Source. GB/T 20871.12-2024, 3.5.58]

3.3 Subpixel uniformity

The thickness uniformity of the printed film within a sub-pixel.

Note. It is used to characterize the uniformity of film formation of sub-pixels, which is related to the printing ink, the material and structure of the sub-pixel defining layer or the drying process.

3.4

The uniformity of the thickness of the printed film between adjacent sub-pixels.

Note. It is used to characterize the uniformity of film formation of adjacent sub-pixels of the same color, and is related to the nozzle used.

3.5

The thickness uniformity of the printed film of multiple sub-pixels of the same color within a certain range.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 17 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 20871.12

Editions of GB/T 44390

Edition	Title	Revision	Status
GB/T 44390-2024	Print display - Measuring method of film uniformity	current edition	Current

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