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LED lamp dimming method

LED lamp dimming method

  • Categories:Company news
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  • Time of issue:2019-07-02
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(Summary description)The most important and common dimming methods for LED lamps are three. These three dimming techniques are based on the change of LED drive current input. According to different circuit systems, it can also be divided into analog dimming and PWM dimming.

LED lamp dimming method

(Summary description)The most important and common dimming methods for LED lamps are three. These three dimming techniques are based on the change of LED drive current input. According to different circuit systems, it can also be divided into analog dimming and PWM dimming.

  • Categories:Company news
  • Author:
  • Origin:
  • Time of issue:2019-07-02
  • Views:9
The most important and common dimming methods for LED lamps are three. These three dimming techniques are based on the change of LED drive current input. According to different circuit systems, it can also be divided into analog dimming and PWM dimming.
 
The first type: This dimming method is to complete the dimming of the LED lamp by modulating the LED driving current. Since the brightness of the LED chip and the LED driving current are in a certain ratio, the LED driving current can be controlled to control the LED lamp. Light and dark.
 
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Second: This dimming method is called pulse width modulation (PWM). The method is that the driving current is square wave-shaped by conditioning, and the pulse width is variable, and the modulation of the pulse width is converted into the time when the modulated LED lamp is successively lit, and the input power is also converted, thereby achieving energy saving and dimming. aims. The frequency is about 200Hz~10KHz as usual; because of the hysteresis of the human eye, it will not feel the flickering phenomenon caused by the light source during the dimming process. The advantage of this kind of dimming method is that it can improve the heat dissipation function of the LED. The disadvantage is that the overshoot of the driving current must have a certain influence on the life of the LED chip, which has a certain influence on the hometown of Chinese lamps. The brand continues to use new energy-saving and environmentally friendly technologies to develop products to meet market demand.
 
Third: This dimming method is called a dimming method or a linear dimming method. The advantage of this kind of dimming method is that when the driving current is linearly increased or decreased, the influence of the driving current overshoot on the life of the LED chip is reduced, and the anti-noise of the dimming circuit is strong. The disadvantage is that the process of changing the magnitude of the driving current must have a certain influence on the color temperature of the LED chip.
 
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