Guide: Strobe is actually a kind of irritating perception of eyes by illumination light source. The human eye's perception of the flicker of a light source mainly depends on the amplitude and frequency of the brightness of the light source. The brightness amplitude of the light source is usually expressed by the modulation percentage of the amplitude and its brightness value.

 LED strobe refers to two concepts

The first is stroboscopic: the depth of fluctuating light flux of the electric light source. The greater the fluctuation depth, the greater the stroboscopic depth.

The second is the strobe effect: the negative effect of electric light strobe on human vision. The greater the stroboscopic depth, the greater the negative effects and the more serious the harm.

Strobe and strobe effect have a direct relationship with the type of electric light source and its technical performance. Different types of electric light sources with different technical performances have different stroboscopic and stroboscopic effects.

Strobe is actually a kind of irritating perception of eyes by illumination light source. The human eye's perception of the flicker of a light source mainly depends on the amplitude and frequency of the brightness of the light source. The brightness amplitude of the light source is usually expressed by the modulation percentage of the amplitude and its brightness value. Experiments have shown that different frequencies of the illumination light source cause the human eye to detect the threshold percentage of stroboscopic amplitude modulation.

We just talked about the strobe effect of LED lighting products, but many people don't know what it means.

The essence of the stroboscopic light source is the fluctuation of the luminous flux. Under the driving of AC or pulsed DC, the luminous flux, illuminance or brightness of the light source changes correspondingly with the periodic change of the current amplitude. Subjective response.

Usually flicker is divided into visible flicker and invisible flicker according to human feeling. When the frequency is greater than 100Hz, the human eye does not feel the flicker phenomenon, but it will still cause eye fatigue, headache, etc. This is the strobe effect. It is generally believed that the effect exists within 500Hz. In this regard, ENERGYSTARlampsV1.0draft4 specifies the conditions that need to be met for flicker in the dimming performance requirements, and is used for all lamps. As shown in the figure below:

The allowed range of the light source strobe is:

1. The frequency is not less than 120Hz;

2. Within the frequency range of 120Hz-800Hz, F1 & lt; 0.001X frequency

3. When the frequency is greater than 800Hz, there is no requirement for F1;

4. When the frequency is uncertain, PF & lt; 30%;

In addition, the output frequency of compact fluorescent light needs to be 20-30KHz, or greater than 40KHz.

The nature of light source strobe is the instability of luminous flux. When detecting the fluctuation of the light source over time, both the change curve of brightness and the change curve of luminous flux or illuminance under the same conditions can be tested.