Drivers with dimming capability can dim the LED light output over the full range from 100% to 0%. Dimming drivers can dim LEDs by reduction in the forward current, pulse width modulation (PWM) via digital control, or more sophisticated methods. Most dimming drivers operate using the PWM method. With this method, the frequency could range from a hundred modulations per second to as high as hundreds of thousands of modulations per second, so that the LED appears to be continuously lighted without flicker.
At present, the most commonly used LED dimming power: LED thyristor dimming power, LED 0 / 1-10V dimming power, PWM dimming power supply. Other dimming works by controlling the current and voltage, the frequency of the output to achieve the LED dimming function.
0-10V/PWM/RX Dimming Driver 10V Dimmable Led Driver,Led Pwm Driver,Constant Current Driver Dimmable ShenZhen Fahold Electronic Limited , https://www.fahold.com
On September 27th, from 9:30 to 12:00, the "12th High-tech LED Industry Summit Forum and LED Supply Chain Brand Summit--Package and Lighting Special Agenda" was successfully held in Guangzhou Pazhou Canton Fair. The meeting invited Liu Zhen, general manager of Zhaomingxin Technology, Zou Yiming, general manager of Xinyue Optoelectronics, Wang Mengyuan, general manager of Zhonghao Optoelectronics, Wang Pingjin, chairman of Yingluohua Electronics, Chen Xiangdong, chairman of Silan Microelectronics, and Liu Ronghui, director of Rare Earth Research. Explore the transformation and development of the supply chain in the era of LED lighting market growth. 
Liu Ronghui: white phosphor based LED according to a color-regulation and with the application of the white LED <br> <br> accelerate penetration in indoor lighting, white LED lamp performance requirements must be simply pursuing "high brightness" conversion from an initial balance Consider "high quality" of performance parameters such as color rendering performance and color temperature.
Liu Ronghui, director of the Rare Earth Luminescence Division, introduced that the indicator and color temperature of the luminaire are mainly expressed by the characteristics of the spectrum, that is, the spectrum is controlled by changing the combination and performance of the phosphor. To improve the spectral characteristics, we need to improve the quality of the phosphor.
Liu Ronghui said that for LED light sources, even if one or two color samples have a very low special color rendering index, a higher general color rendering index value can be obtained after averaging; likewise, a lower general color rendering index value is obtained. The light source may have a higher specific color rendering index value for one or two color samples.
According to Liu Ronghui, the Ra value is more one-sided than the one-sided surface, and does not contain saturated red. Red is sensitive to color rendering, yellow-green has a large contribution to brightness, and the green color matching package white light device has a color rendering index of 80-82, R9 is 0-5.
Liu Ronghui said, "To achieve high quality of LED products, color rendering Ra has its importance, and improving the light quality of semiconductor lighting from the perspective of phosphors is one of the most effective technical approaches." 
[Text|High-tech LED reporter Gan Qin] In 2014, it was called the first year of lighting in the industry, but in the first half of this year, there is still a phenomenon of running the capital chain breaks. How should LED lighting enterprises optimize the supply chain? How to create differentiated and competitive products? From price wars to quality wars, how do middle and upper reaches companies seize opportunities and how to control supply chain risk?