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GB/T 18910.64-2025 English PDF

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US$539.00 · In stock
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GB/T 18910.64-2025: Liquid crystal display devices - Part 6-4: Test methods - Liquid crystal displaymodules with dynamic backlight units
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 18910.64-2025	539	Add to Cart	5 days	Liquid crystal display devices - Part 6-4: Test methods - Liquid crystal displaymodules with dynamic backlight units	Valid

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GB/T 43978 GB/T 43979 GB/T 43770 GB/T 18910.103 GB/T 18910.63 GB/T 18910.61

Basic data

Standard ID: GB/T 18910.64-2025 (GB/T18910.64-2025)
Description (Translated English): Liquid crystal display devices - Part 6-4: Test methods - Liquid crystal displaymodules with dynamic backlight units
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: L53
Classification of International Standard: 31.120
Word Count Estimation: 26,259
Date of Issue: 2025-04-25
Date of Implementation: 2025-11-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 18910.64-2025: Liquid crystal display devices - Part 6-4: Test methods - Liquid crystal display modules with dynamic backlight units

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 31.120 CCSL53 National Standard of the People's Republic of China Liquid crystal display devices Part 6-4. Test methods for LCD modules with dynamic backlight Released on 2025-04-25 2025-11-01 Implementation State Administration for Market Regulation The National Standardization Administration issued

Preface III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms, definitions and abbreviations 1 3.1 Terms and Definitions 1 3.2 Abbreviations 1 4 Measuring equipment 2 5 Standard test conditions 2 5.1 Standard atmospheric conditions 2 5.2 Power Supply 2 5.3 Warm-up time 2 5.4 Standard darkroom conditions 2 5.5 Standard installation conditions 3 5.6 Signal Pattern 3 6 Test Methods 6 6.1 Optical performance 6 6.2 Power consumption 15 Appendix A (Informative) Flicker Measurement Example 16 References 19 Figure 1 DUT installation method 3 Figure 2 Full screen pattern 3 Figure 3 Checkerboard pattern 4 Figure 4 Incremental window pattern 4 Figure 5 Stripe pattern 5 Figure 6 Dynamic image 5 Figure 7 Example of the relationship between input signal level and chromaticity 8 Figure 8 Dynamic brightness stability curve 9 Figure 9 Instrument layout 11 Figure 10 Time contrast sensitivity function 12 Figure 11 Example of TCSF weighted brightness waveform 13 Figure 12 Jitter dynamic curve 14 Figure A.1 Brightness and time function L(t) 16 Figure A.2 Fourier transform power spectrum P(F) 16 Figure A.3 Perceptual power spectrum of flicker samples 17 Figure A.4 Flicker brightness of screen samples after weighted TCSF17 Table 1 APL 5 of the incremental window pattern Table 2 TCSF time contrast sensitivity function12 Table A.1 Brightness values of L'(t) 18

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. This document is part 6-4 of GB/T 18910 "Liquid Crystal Display Devices". GB/T 18910 has published the following parts. --- Part 1-1.General specification; --- Part 1-2.Terms and symbols; --- Part 2.Liquid crystal display module specification; --- Part 2-1.Passive matrix monochrome liquid crystal display module blank detail specification; --- Part 2-2.Blank detail specification for color matrix liquid crystal display modules; --- Part 3.Liquid crystal display sub-specification; --- Part 4.Basic ratings and characteristics of liquid crystal display modules and panels; --- Part 4-1.Basic ratings and characteristics of color matrix liquid crystal display modules; --- Part 6-1.Test methods for optoelectronic parameters of liquid crystal display devices; --- Part 6-2.Test methods for liquid crystal display modules, reflective type; --- Part 6-3.Liquid crystal display module test method Active matrix liquid crystal display module motion artifacts; --- Part 6-4.Test methods for liquid crystal display modules with dynamic backlight; --- Part 10-1.Environmental, durability and mechanical test methods Machinery; --- Part 10-2.Environmental, durability and mechanical test methods Environment and durability; --- Part 10-3.Environmental, durability and mechanical test methods for glass strength and reliability; --- Part 20-1.Visual inspection of monochrome liquid crystal displays; --- Part 20-2.Visual inspection of monochrome matrix liquid crystal display modules; --- Part 20-3.Visual inspection of active matrix color liquid crystal display modules. This document is equivalent to IEC 61747-30-4.2016 "Liquid crystal display devices Part 30-4.Measurement methods for liquid crystal display modules" Dynamic Backlight Components. The following minimal editorial changes were made to this document. --- Change the name of the standard to "Liquid Crystal Display Devices Part 6-4.Test Methods for Liquid Crystal Display Modules with Dynamic Backlight"; --- Notes were added to 5.6.2 and 5.6.4; ---6.1.2.4.1b), 6.1.6.4h) add serial numbers to the formulas, and adjust the serial numbers of all subsequent formulas; --- In 6.1.2.4.3, "measure each white rectangle in Figure 3b) and Figure 3d)" is changed to "measure [Figure 3a) and Figure 3b) in Figure 3a) and Figure 3b) Figure 3b) uniform calculation; Figure 3c) and Figure 3d) uniform calculation] each white rectangle "; --- "V" in Table A.1 is changed to "L'min"; --- Add “×100%” to Formula A.1. 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 by the Ministry of Industry and Information Technology of the People's Republic of China. This document is under the jurisdiction of the National Technical Committee for Standardization of Electronic Display Devices (SAC/TC547). This document was drafted by. Zhejiang Sanse Optoelectronic Technology Co., Ltd., Xiamen Metrology Verification and Testing Institute, Hangzhou Santai Testing Technology Co., Ltd. Co., Ltd., China Electronics Technology Standardization Institute, Leyard Optoelectronics Co., Ltd., TCL Huaxing Optoelectronics Technology Co., Ltd., BOE Technology Group Co., Ltd. The main drafters of this document are. Mou Tongsheng, Kang Pinchun, Mou Xi, Ruan Yujiao, Liu Li, Bai Jianjun, Zhang Yuqin, Sun Zhehui, Wang Feixia, Feng Yanli, Dunsom Castle.

Introduction

In order to meet the production, manufacturing, inspection, and import and export trade needs of liquid crystal display device products in my country, a series of standards for liquid crystal display devices are formulated. GB/T 18910 is intended to consist of the following parts. --- Part 1-1.General specification. The purpose is to specify the general procedures for the inspection of liquid crystal display devices and to give the electro-optical characteristics test method. General requirements, requirements for climatic, mechanical and durability tests. --- Part 1-2.Terms and symbols. The purpose is to define the preferred terms, definitions and text symbols for liquid crystal display devices. --- Part 2.Liquid crystal display module section specification. The purpose is to specify the quality assessment procedures and inspection requirements required for evaluating liquid crystal display modules. requirements, screening sequences, sampling requirements, details of tests and test methods. --- Part 2-1.Passive matrix monochrome liquid crystal display module blank detail specification. The purpose is to specify the format and summary page requirements. The minimum requirements and detailed specifications. --- Part 2-2.Blank detail specification for color matrix liquid crystal display modules. The purpose is to specify the requirements for the format and summary page to and the most basic content of detailed specifications. --- Part 3.Liquid crystal display screen specification. The purpose is to specify the quality assessment procedures and inspection requirements required for evaluating liquid crystal display screens. requirements, screening sequences, sampling requirements, tests and test methods. --- Part 3-1.Liquid Crystal Display (LCD) Screen Blank Detailed Specification. The purpose is to define the quality assessment system for LCD screens. --- Part 4.Basic ratings and characteristics of liquid crystal display modules and panels. The purpose is to specify liquid crystal display panels and passive matrix monochrome Basic ratings and characteristic requirements of LCD display modules. --- Part 4-1.Basic ratings and characteristics of color matrix liquid crystal display modules. The purpose is to specify the basic ratings and characteristics of color matrix liquid crystal display modules. Basic ratings and characteristic requirements of the block. --- Part 5.Environmental, durability and mechanical test methods. The purpose is to evaluate the environmental performance of liquid crystal display devices and to determine uniform The preferred test method and preferred value of stress level. --- Part 6-1.Test methods for electro-optical parameters of liquid crystal display devices. The purpose is to specify the standard for electro-optical parameters of liquid crystal display devices. Standard test conditions and test methods. --- Part 6-2.Test method for liquid crystal display module reflective type. The purpose is to specify the detailed quality of reflective liquid crystal display modules Evaluation procedures, inspection requirements, screening procedures, sample requirements, and test and measurement procedure requirements. --- Part 6-3.Liquid crystal display module test method Active matrix liquid crystal display module motion artifacts. The purpose is to specify the transmissive General quality assessment procedure for motion picture performance of thin film transistor liquid crystal display devices. --- Part 6-4.Test methods for active matrix liquid crystal display modules with dynamic backlight. The purpose is to specify the test methods for active matrix liquid crystal display modules with dynamic backlight. Standard test conditions and test methods for the optical performance and power consumption of LCD modules. --- Part 10-1.Environmental, durability and mechanical test methods Mechanical. The purpose is to evaluate the mechanical properties of liquid crystal display devices It is possible to determine a unified optimal test method and optimal value of stress level. --- Part 10-2.Environmental, durability and mechanical test methods Environmental and durability. The purpose is to evaluate the performance of liquid crystal display devices. Environmental performance, determine the unified optimal test method and stress level optimal value. --- Part 10-3.Environmental, durability and mechanical test methods for glass strength and reliability. The purpose is to specify liquid crystal display devices Test methods for strength and reliability of glass. --- Part 20-1.Visual inspection of monochrome liquid crystal displays. The purpose is to specify the visual inspection method for monochrome liquid crystal displays. --- Part 20-2.Visual inspection of monochrome matrix liquid crystal display modules. The purpose is to specify the visual inspection method for monochrome matrix liquid crystal display modules. --- Part 20-3.Visual inspection of active matrix color liquid crystal display modules. The purpose is to give the visual inspection of transmissive active matrix color liquid crystal display modules by the human eye. Detailed requirements and general rules for the quality assessment procedure for visual inspection of liquid crystal display modules. Liquid crystal display devices Part 6-4. Test methods for LCD modules with dynamic backlight

1 Scope

This document specifies standard test conditions and tests for the optical performance and power consumption of active-matrix liquid crystal display modules with dynamic backlights method.

2 Normative references

The contents of the following documents constitute essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. ISO 11664-1 Colorimetry - Part 1.CIE standard colorimetry observer Note. GB/T 18910.12-2024 Liquid crystal display devices Part 1-2.Terms and symbols (IEC 61747-1-2.2014, IDT) IEC 61747-30-1.2012 Liquid crystal display devices Part 30-1.Measurement methods for liquid crystal display modules Transmission type (Liquid sivetype) Note. GB/T 18910.61-2021 Liquid crystal display devices Part 6-1.Test methods for liquid crystal display devices Optoelectronic parameters (IEC 61747-30-1. 2012, NEQ) Note. GB/T 44021 (all parts) Measurement of power consumption of audio, video and related equipment [IEC 62087 (all parts)] 3 Terms, definitions and abbreviations 3.1 Terms and Definitions For the purposes of this document, the terms and definitions defined in IEC 61747-1-2 and the following apply. 3.1.1 Judder Moving images experience momentary instabilities associated with motion. Note. Non-smooth motion refers to hysteresis, discontinuity or other disturbances in smooth motion. 3.2 Abbreviations The following abbreviations apply to this document. ......

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Question 1: How long will the true-PDF of GB/T 18910.64-2025_English be delivered?

Answer: Upon your order, we will start to translate GB/T 18910.64-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 3 ~ 5 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 18910.64-2025_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 18910.64-2025_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.