LED flicker, that is, the LED liquid crystal display screen flickers. The LED liquid crystal display has a backlight strobe in low-brightness mode, similar to the old CRT display. Use your fingers to quickly shake in front of the screen to see smear. 1. LED flicker refers to two concepts: The first is flicker: the depth of fluctuating light flux of the electric light source. The greater the fluctu...
The LM-79 is the North American Lighting Association’s standard for test methods for LED products. The LM-79 is an electrical and photometric method for solid state lighting products. Test methods for all LED products, including test content: electrical parameters, color parameters, luminous flux, luminous efficiency, light intensity distribution, chroma non-uniformity. ENERGY STAR has a lar...
Electromagnetic interference (abbreviated as EMI) refers to the interference phenomenon caused by the interaction of electromagnetic waves and electronic components. There are two types of conducted interference and radiated interference. Conducted interference refers to the coupling (interference) of signals on one electrical network to another electrical network through a conductive medium. Radi...
On 5th, December, 2019, the European Commission officially announced the new ErP Regulation (EU) 2019/2020 and Energy Efficiency Labelling Regulation (EU) 2019/2015 for lighting products, which will replace the current ErP Regulation (EC) No 244/2009, (EC) ) No 245/2009, (EU) No 1194/2012 and Energy Efficiency Labeling Regulation (EU) No 874/2012. The new regulations have been issued for more tha...
Introduction: The TTC-1 Tracking Test Chamber which used for determining the degree of protection against formation of conducting paths in solid insulating materials, due to the electric stress and electrolytic contamination of the surface. This method simulates tracking currents on insulation material by providing drops between electrodes. During the process of normal use, insulating material may...
Abstract The improvement and spreading of the LED filaments lamps requires reliable and accurate methods and instruments for junction temperature measurement. Based on the forward voltage methods, the measurement process and the equipment of LED filaments lamps are introduced. And the dependence of junction temperature on various factors are discussed. General Though the LED filament lamp technolo...
Recently, the General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China and the National Standardization Administration approved and issued the version GB/T 4208-2017 “Enclosure Protection Level (IP Code)”. This version will replace the old GB/T 4208-2008 version and it has been officially implemented on February 1, 2018. We...
IESNA Illuminating Engineering Society of North America and ANSI American National Standards Institute jointly issued ANSI/IES LM-80-15 IES Approved Method On June 26, 2015: Measuring Luminous Flux and Color Maintenance of LED packages, Arrays and Modules. Full Chinese name: LED package, array, module luminous flux and color maintenance test method, and can accept AC constant voltage, DC constant ...
In the field of lighting, fluorescent lamps as a traditional light source have been widely used in the past few decades and have been widely used in commercial and civilian places such as shopping malls, schools, offices, parking garages, and factories. Fluorescent lamp is essentially a low-pressure gas discharge lamp, which exhibits negative resistance characteristics during operation, and requir...
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