GB/T 43978-2024 PDF in English
GB/T 43978-2024 (GB/T43978-2024, GBT 43978-2024, GBT43978-2024)
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Evaluation requirements for visual comfort of indoor LED displays
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Standards related to (historical): GB/T 43978-2024
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GB/T 43978-2024: PDF in English (GBT 43978-2024) GB/T 43978-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 31.120
CCS L 53
Evaluation Requirements for Visual Comfort of Indoor LED
Displays
ISSUED ON. APRIL 25, 2024
IMPLEMENTED ON. APRIL 25, 2024
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative References... 4
3 Terms and Definitions... 4
4 Requirements for Light Comfort Evaluation... 5
4.1 Requirements for Structural Characteristics... 5
4.2 Requirements for Functional Characteristics... 5
4.3 Requirements for Optoelectronic Performance... 5
4.4 Evaluation Limits of Light Comfort... 5
4.5 Requirements for Subjective Evaluation... 6
5 Requirements for Use and Maintenance... 7
5.1 Requirements for Use... 7
5.2 Requirements for Maintenance... 7
6 Recommended Watching Conditions... 7
6.1 Watching Distance... 7
6.2 Field Angle of Watching... 8
Foreword
This document was drafted in accordance with the rules provided in GB/T 1.1-2020 Directives
for Standardization - Part 1.Rules for the Structure and Drafting of Standardizing Documents.
Please be noted that certain content of this document may involve patents. The institution
issuing this document does not undertake the responsibility of identifying these patents.
This document was proposed by Ministry of Industry and Information Technology of the
People’s Republic of China.
This document shall be under the jurisdiction of National Technical Committee on Electronic
Displays of Standardization Administration of China (SAC/TC 547).
The drafting organizations of this document. China Electronics Standardization Institute;
Shenzhen ESI Information Technology Co., Ltd.; Guangzhou ESI Standard Testing Research
Institute Co., Ltd.; Leyard Optoelectronics Co., Ltd.; Color Space (Beijing) Technology Co.,
Ltd.; National Institute of Metrology China; TCL China Star Optoelectronics Technology Co.,
Ltd.; Zhejiang Super Technology Co., Ltd.; Shanghai Sansi Electronic Engineering Co., Ltd.;
Hangzhou Hikvision Digital Technology; Xiamen Products Quality Supervision & Inspection
Institute; Shenzhen Unilumin Technology Co., Ltd.; Sichuan NEWSTRONG Ultra HD
Technology Co., Ltd.; Xiamen University of Technology; VTRON Group Co., Ltd.; State Grid
Jiangsu Electric Power Co., Ltd.; Shanxi GKGD Optoelectronics Technology Co., Ltd.;
Sichuan Guangming Electric Power Construction Engineering Co., Ltd.
The main drafters of this document. Liu Xiujuan, Zhao Ying, Zhou Gang, Wu Duxiong, Bai
Jianjun, Chen Ting, Chen Chi, Huang Shenghua, Huang Weidong, Li Junkai, Liu Li, Xiang
Jianyong, Ling Jie, Fu Nuoyi, Cheng Chunjin, Wang Subin, Song Xiaomin, Wang Yingqian,
Jiang Xindong, Liu Keliang, Liu Weijian, Xu Lu, Xu Xiaoyi, Lu Jianping, Jie Xinzhong, Li Yi.
Evaluation Requirements for Visual Comfort of Indoor LED
Displays
1 Scope
This document specifies the evaluation requirements for visual comfort of indoor light emitting
diode (LED) display (hereinafter referred to as “LED display”).
This document is applicable to the evaluation of visual comfort of LED display (excluding
movie theaters, studios and multimedia classrooms).
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB/T 43770-2024 Specification for Indoor LED Displays
GB/T 43979-2024 Evaluation Methods for Visual Comfort of Indoor LED Displays
SJ/T 11141-2017 Generic Specification for LED Displays
SJ/T 11281-2017 Measure Methods of Light Emitting Diode (LED) Displays
3 Terms and Definitions
The terms and definitions defined in GB/T 43770-2024 and SJ/T 11141-2017, and the following
are applicable to this document.
3.1 visual comfort of indoor LED displays
During the viewing of the LED display, the degree of physical and psychological comfort that
the viewer feels.
3.2 ambient contrast ratio
Under the application environment, the ratio of the 100% white field brightness to the black
field brightness of the LED display.
3.3 brightness ratio of displays and ambient
The ratio of the 100% white field brightness of the LED display to the average brightness of
---a burning sensation in the eyes;
---eye pain;
--a feeling of tightness in the eyes;
---eye irritation;
---a tearing sensation in the eyes;
---blurred vision;
---double vision;
---dry eyes.
c) Other feelings
---headache.
5 Requirements for Use and Maintenance
5.1 Requirements for Use
Before use, users shall read the user manual. To ensure the comfort of the LED display, it shall
be used in accordance with the manufacturer’s requirements.
5.2 Requirements for Maintenance
To ensure the comfort of the LED display, the LED display shall be regularly maintained, and
only professional LED display maintenance personnel can maintain or repair it.
6 Recommended Watching Conditions
6.1 Watching Distance
The watching distance is one of the factors that affects the light comfort evaluation of the LED
display. The watching distance should not be less than the minimum range of visibility. The
relations between the minimum range of visibility and the pixel center spacing can be found in
Formula (1).
Where,
DMVD---the minimum range of visibility, expressed in (mm);
P---the pixel center spacing, expressed in (mm).
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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