Detection of LED strobe and strobe effect of the method

- Apr 05, 2017-

LED strobe effect refers to two concepts. First, strobe: that is, the depth of light flux fluctuati-

ons, the greater the depth of the wave, the greater the depth of strobe. Second, the strobe effect:

that is, electric light strobe in the human visual impact on the negative. The greater the strobe

depth, the greater the negative effect, the more serious the harm. Strobe and strobe effect, with

the type of light source, and its technical performance has a direct relationship. Different types

and different technical performance of the electric light source, the strobe and strobe effect is 

also different.


Strobe is actually a kind of stimulating perception of the light source on the eye. The human eye's 

perception of light strobe is mainly dependent on the amplitude and frequency of the brightness of 

the light source. The brightness amplitude of the light source is usually expressed as the percentage

of amplitude modulation and its brightness value. Experiments show that the frequency of the light 

source is different from the human eye can detect the threshold amplitude of the strobe amplitude 

modulation is also different. When the frequency is lower than 15Hz, the amplitude modulation 

degree is higher, even if the smaller amplitude modulation degree will be sensitive to strobe, but 

when the light source oscillation frequency reaches 50Hz above, the human eye is not easy to detect

strobe. Through experiments, the higher the brightness of the light source, the critical flicker 

frequency will be increased accordingly. In addition, if the light source oscillation frequency is 

not easy to detect strobe. But when using a light source to observe a rotating object, the human 

eye can be perceived to light is not to 50Hz limit.


First, the detection and evaluation tools:

Intuitive detection and evaluation of strobe and strobe effect of the tool, usually using strobe 

detection dedicated gyro.


Second, the detection criteria:


Is the sun as the standard. The luminous flux of sunlight is smooth and stable, there is no strobosc-

opic and strobe effect. The luminous flux of the energy-saving lamp is smooth and stable, the closer

to the sunlight, the smaller the strobe depth of the energy-saving lamp, the smaller the stroboscopic

effect. Third, the detection and evaluation methods


1. First in the sun under the selected a plane, the special detection gyro on the plane rotation. 

Dedicated detection of the pattern on the gyroscope, is a multi-channel black and white halo. In 

the whole process of rotation, the pattern on the gyro does not change with the speed of rotation, 

but is stable and fixed. This kind of black and white, and stable fixed halo pattern, color 

phenomenon, indicating that the sun is not stroboscopic and stroboscopic effects of harm.


2. In the room to select a plane, hanging in the top of a vertical high-pressure mercury lamp, and 

more than just different brands of energy-saving lamps, and energy-saving lamps number. For high 

pressure mercury lamps and more than just different brands of energy-saving lamps, the implementation

of independent switch control.


3. Turn on the high pressure mercury lamp, will be dedicated detection gyro, placed under high 

pressure mercury lamp rotation. Dedicated detection gyro will produce a variety of multi-channel 

halo, and the halo of the road, with the gyro rotation speed changes, showing the rotation direction

, rotation speed, color random changes. This pattern, the rich color changes, indicating that high 

pressure mercury lamp strobe and strobe effect is very serious.


4. Turn on the energy-saving lamps, respectively, rotating the dedicated detection gyro. Special 

inspection gyroscope patterns, colors, will produce the following changes in the phenomenon.

A, dedicated detection gyro only produce multi-channel black and white halo, and black and white 

halo, with the gyro rotation speed changes. Its rotation direction, rotation speed, color does not 

change, stable and fixed, similar to the effect in the sun. Indicating that this energy-saving lamps,

no strobe and stroboscopic effects of harm.


B, dedicated detection gyro to produce multi-channel color different halo, and the road aura, with 

the gyro rotation speed changes, showing the rotation direction, rotation speed, color random changes

,only the color color lighter. Indicating that this energy-saving lamps still produce stroboscopic and 

strobe effects.


C, in the still produce stroboscopic and stroboscopic effects of energy-saving lamps. Color color 

is relatively strong energy-saving lamps, strobe and strobe effect is relatively serious damage. 

Color color is relatively light energy-saving lamps, strobe and strobe effect is relatively light.


With the strobe detection dedicated gyroscope, evaluation of energy-saving lamps strobe and strobe 

effect, intuitive cylinder, easy to operate. In the actual lighting energy-saving engineering desig-

n, should use no stroboscopic effect of the green light source, to build a bright, clear and comfort

-able lighting environment.


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