GB21520-2023
Minimum allowable values of energy efficiency and energy efficiency grades for displays
显示器能效限定值及能效等级
GB 21520-2023 is a current mandatory Chinese national standard for Minimum allowable values of energy efficiency and energy efficiency grades for displays. It appears in the Construction compliance cluster with a energy efficiency focus and has an implementation date of Jun 1, 2024.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard applies to general and commercial displays with a screen diagonal of no less than 40cm, utilizing LCD and OLED technologies. It also covers LED panel-controller integrated display terminals with specific pixel pitch and brightness criteria. This standard is mandatory for applicable display manufacturers entering the Chinese market, excluding professional monitors, dual-screen devices, and battery-only displays.
Technical requirements
GB 21520-2023 establishes the energy efficiency grades and minimum allowable values for various display technologies. It categorizes energy efficiency into three grades, where Grade 1 represents the highest efficiency. Manufacturers must ensure their products meet the minimum Grade 3 requirements to be compliant. The standard specifies distinct energy efficiency limits for standard and high-performance variants of LCD, OLED, and LED integrated displays. High-performance classifications are determined by criteria such as viewing angle, resolution, color gamut, refresh rate, and HDR peak brightness. In addition to active mode efficiency, the standard sets strict power consumption limits for sleep mode and off mode. External power supplies used with these displays must also comply with the requirements specified in GB 20943.
Testing methods
Energy efficiency and power consumption testing must be conducted in an optical darkroom under specific environmental conditions. The standard outlines procedures using an 8-level grayscale signal and a white window signal to determine standard testing states. Display performance metrics for high-performance models, including viewing angle, contrast, and color gamut, are evaluated according to the detailed methodologies in Annex B and Annex C, referencing standards like SJ/T 11281 and IEC 62087-2:2015.
FAQs
What products are regulated under GB 21520-2023?
It regulates general and commercial LCD and OLED displays (≥40cm diagonal) and specific LED integrated display terminals. It excludes professional broadcast monitors, VR/AR devices, and battery-only displays.
Are there any updates from the previous version of GB 21520?
Yes, the 2023 version replaces the 2015 edition, expanding the scope to include OLED displays and LED integrated terminals, and updating the energy efficiency grades and power limits for sleep and off modes.
How is a high-performance display defined in this standard?
A display is classified as high-performance if it meets at least three out of five specified criteria, which include viewing angle, resolution, NTSC color gamut, refresh rate, and HDR peak brightness.
The summary above provides a high-level overview of GB 21520-2023. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 21520-2023 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Management
- CCS
- F01
- ICS
- 27.010
- Competent department
- Standardization Administration of China
- Technical committee
- National Technical Committee on Energy Fundamentals and Management of Standardization Administration of China
Relationships
Replaces:GB 21520-2015