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26 Nov, 2020 1138 Views Author: LISUN

Definition and Test Method of LED Flicker

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 fluctuation depth, the greater the flicker depth.
The second is the flicker effect: the negative effect of electric light strobe on human vision. The greater the flicker depth, the greater the negative effects and the more serious the harm.
flicker and flicker effect have a direct relationship with the type of electric light source and its technical performance. Different types and different technical performances of electric light sources have different flicker effects.

2. LED LCD screen flickers
LED liquid crystal display, with backlight flicker in low-brightness mode, similar to the old CRT display, use your fingers to quickly shake in front of the screen, visible smear.
This flicker can cause eye fatigue. Although it does not flash in the brightest mode, it is also dazzling to the eyes.
The reason for the flicker is that the LED backlight uses PWM (pulse width modulation wave) technology, which reduces the brightness of the LED by reducing the power-on frequency. When it reaches a certain limit, the above-mentioned visible flicker appears. The display technology propagates absolutely without flickering.

LISUN is professional for manufacture LED test equipment and have experience in flicker test equipment for many years. LISUN LSRF-3 Lamp start, Run-up time and flicker test system and LSP-500VARC-Pst AC power supply: Designed in full accordance with BASIC, Energy Star V2.1, IEC-Pst, CA CEC, ASSIST, IECTR61547-1, CIE SVM and IEEE Std 1789 standards.

Lamp Start, Run-up Time and Flicker Test System

Lamp Start, Run-up Time and Flicker Test System

Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

Our main products are Goniophotometer, Surge Generator, EMC Test SystemsESD Simulator, EMI Test Receiver, Electrical Safety Tester, Integrating Sphere, Temperature Chamber, Salt Spray Test, Environmental Test ChamberLED Test Instruments, CFL Test Instruments, Spectroradiometer, Waterproof Test Equipment, Plug and Switch Testing, AC and DC Power Supply.

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