GB24850-2020
Minimum allowable values of energy efficiency and energy efficiency grades for flat panel televisions and set-top boxes
平板电视与机顶盒能效限定值及能效等级
GB 24850-2020 is a current mandatory Chinese national standard for Minimum allowable values of energy efficiency and energy efficiency grades for flat panel televisions and set-top boxes. It appears in the Construction compliance cluster with a energy efficiency focus and has an implementation date of Aug 1, 2021.
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 liquid crystal televisions and organic light-emitting diode televisions (collectively referred to as flat panel televisions), as well as general-purpose set-top boxes (cable, terrestrial, satellite, and network) operating under AC220V, 50Hz power supply. It also covers display devices without tuners but marketed as TV products. This standard does not apply to direct broadcast satellite set-top boxes.
Technical requirements
The standard establishes 5 energy efficiency grades for flat panel televisions, with Grade 1 being the highest. The minimum allowable values are determined by screen resolution: ≤1920x1080 must meet Grade 3, >1920x1080 and ≤3840x2160 must meet Grade 4, and >3840x2160 must meet Grade 5. All flat panel televisions must have a passive standby power of ≤0.50W. Devices using external power supplies must also comply with GB 20943. For set-top boxes, the energy efficiency grades are divided into 3 levels, with Grade 1 as the highest. The minimum allowable value corresponds to the Grade 3 requirement. The on-mode power limit is calculated by adding a base power limit to the sum of additional function power consumption factors (ΣPfa). Additional functions include UHD output, internal hard disks, HDMI interfaces, and routing capabilities. The passive standby power for set-top boxes must not exceed 1.0W.
Testing methods
Energy efficiency testing for flat panel televisions is conducted in a dark room using specific dynamic video signals defined in IEC 62087-2:2015 and an eight-grayscale nine-window signal. The testing distance is specified as 3 times the screen height. Passive standby power is measured after the device remains in standby for 10 minutes. For set-top boxes, the testing procedures define specific standard operating conditions based on the type (cable, terrestrial, satellite, or network). On-mode power is measured using a digital integrating power meter for at least 10 minutes, while passive standby power is measured after 5 minutes in standby mode.
FAQs
What products are regulated under GB 24850-2020?
It applies to liquid crystal and organic light-emitting diode flat panel televisions, as well as cable, terrestrial, satellite, and network set-top boxes. It does not apply to direct broadcast satellite set-top boxes.
What are the main changes from the previous versions of GB 24850-2020?
It replaces GB 24850-2013 and GB 25957-2010. Key changes include modifying the flat panel TV energy efficiency grades to 5 levels, updating the evaluation metrics, adding power consumption factors for set-top box additional functions, and introducing specific testing methods for network set-top boxes.
What is the passive standby power limit for flat panel televisions?
Under GB 24850-2020, all flat panel televisions must have a passive standby power of less than or equal to 0.50W.
The summary above provides a high-level overview of GB 24850-2020. 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 24850-2020 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
- Standardization Administration of China
Relationships
Replaces:GB 24850-2013, GB 25957-2010