LED dimming method and system

A technology for dimming and brightness adjustment, which is applied in the field of LED dimming methods and systems, can solve problems such as poor linear effect, and achieve the effect of simple operation and high dimming efficiency

Active Publication Date: 2018-02-09
SHENZHEN INST OF ADVANCED TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a LED dimming method, aiming to solve the problem of poor linear effect in the prior art

Method used

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Embodiment Construction

[0018] In order to make the object, technical solution and beneficial effects of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0019] An LED dimming method provided by a specific embodiment of the present invention is completed by an LED dimming system. The method is as follows: figure 1 shown, including:

[0020] S11. Receive an LED dimming request signal;

[0021] S12. Adjust the brightness of the LED according to the level of the LED dimming request signal and the brightness corresponding to the LED input current.

[0022] The specific embodiment of the present invention adjusts the brightness of the LED according to the level of the LED dimming request signal and the brightness corresponding to the LED inp...

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Abstract

The invention is applied to the field of communications, and provides an LED light modulation method and system. The method comprises: receiving LED light modulation request signals; and according to the grade of the LED light modulation request signals and the corresponding brightness of LED input currents, adjusting the brightness of an LED; if the grade of the LED light modulation request signals is smaller than a corresponding brightness of a first current threshold a, adjusting the brightness of the LED by use of a constant conduction time mode; if the grade of the LED light modulation request signals is higher than the corresponding brightness of the first current threshold a and is smaller than the corresponding brightness of a second current threshold b, adjusting the brightness of the LED by use of a PWM mode; and if the grade of the LED light modulation request signals is higher than the corresponding brightness of the second current threshold b, adjusting the brightness of the LED by use of the input current value of the LED. According to the technical scheme provided by the invention, the LED light modulation method and system have the advantages of high light modulation efficiency and simple operation.

Description

technical field [0001] The invention belongs to the field of LEDs, in particular to an LED dimming method and system. Background technique [0002] Energy saving is one of the most prominent advantages of LED, and it is also an important basis for the government to issue policies to promote the application of this technology. At present, there are many LED dimming methods, mainly including: (1) linear dimming, (2) thyristor dimming, (3) pulse width modulation (English: Pulse Width Modulation, referred to as: PWM) dimming. Each of the three dimming technologies has advantages and disadvantages. Linear dimming is based on a simple voltage division principle, which is easy to apply and has no interference, but its application is inflexible and inefficient. Thyristor dimming is a widely used dimming method in the application of energy-saving lamps. Its advantage lies in high working efficiency and stable performance, but its defect is rooted in the need for current to keep on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
CPCY02B20/40
Inventor 周翊民徐国卿刘云
Owner SHENZHEN INST OF ADVANCED TECH
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