[Source: Gaogong LED's "LED Good Products" magazine February issue / Long Zonghui]
"LED lamps are not a simple assembly, we are pursuing the LED drive technology to change the light." Zhang Yimin, general manager of Shenzhen Tianxia Ming Power Co., Ltd. (hereinafter referred to as "Tianxia Ming") said that although there are many LED lighting companies, they are really good. There are not many companies. Why are LED lights glaring? Why does the life expectancy not reach the time promised by the manufacturer? These are all technical problems that LED lighting companies need to solve.
Focus on the consumer experience
At present, consumer terminals talk more about LED lighting to replace incandescent lamps, but in recent years, the delisting policies of incandescent lamps issued by various governments have not brought obvious market benefits to LED lighting, and have not brought about the expected market demand explosion. . The reason is mainly limited by the fact that LED lighting itself still has some technical and cost bottlenecks. For example, incandescent lamps have a large illumination angle, and the cost of LEDs is still high under the same conditions, which is difficult for users to accept.
Although LED lighting technology has made great breakthroughs in recent years, many LED lighting manufacturers have not paid attention to the impact of LED lighting on human comfort. For example, when people work under LED lighting for a long time, their eyes will feel very tired. "In these years, everyone has been paying attention to the life of LEDs, ignoring the damage of LEDs to the human body." Zhang Yimin believes that people can only feel comfortable under natural lighting or artificial lighting without electromagnetic radiation.
At present, LED lighting companies mostly use blue chip and yellow phosphor packaging technology, or obtain white light through remote phosphor technology and adding a fluorescent cover. Although LEDs have been able to achieve energy savings, LED lighting effects are still difficult to match traditional lamps.
Everyone knows that the LED's light efficiency is inversely proportional to the index. How to find the most suitable balance point for the human body will be the focus of subsequent LED lighting research and development.
Domestically, neither the industry nor the relevant regulatory authorities have issued strict LED lighting attenuation and scrapping standards. The international practice is to treat the attenuation by more than 50% as scrapped, but in fact, even if the LED is attenuated to 10%, it can still be lit.
Nowadays, everyone judges that the quality of LED lighting stays more in the life of the product. Tianxia Ming has been paying attention to the change of light by LED drive technology. Through the driving of LED power supplies of different specifications, the final light effect of LED lights is obviously different. The optical, power and heat dissipation structures have a great impact on the efficacy of the LED lamp. At present, 30%-50% of LED lamps sold in the domestic market only stay in the stage of lighting for cost.
"We have been paying attention to the development of LED light source and designing the best LED power solution for a variety of light sources." Zhang Yimin said that the LED light source can maximize the brightness of the lamp bead, and then through the unique dynamic control technology, LED can be realized. The brightness is maximized and the electrical performance of the power supply is fully compliant with the relevant technical specifications of the International Electrotechnical Commission.
"We have already cooperated with Sharp and Cree Research Institute to research LED power solutions specifically for Sharp COB and Cree Lamps." Zhang Yimin said.
Breakthrough in intelligent control technology
LED control technology has been developed from the initial single constant current control to the current thyristor dimming, PWM dimming, segment dimming, DMX512, DALI, ZigBee and other protocol dimming. The control mode has also evolved from the earliest wire-controlled technology to IR, FR, Wi-Fi short-range wireless control and cloud control based on IoT technology.
"LED dimming must break through, otherwise there is no way out." Zhang Yimin believes that LED power dimming can be solved in the next 3-5 years, when the existing LED mode will be completely changed, but not necessarily compatible with thyristor. "The thyristor is not a good product after all. The dimming is to save resources, but in fact the current dimming technology will change the power factor during dimming, causing the grid to waste more resources." Only dimming linearity The degree is very uniform to solve the problem of flicker-free during the dimming process. Zhang Yimin believes.
The traditional thyristor dimmer is mainly used for dimming the incandescent lamp, and the energy-saving lamp itself cannot be dimmed because of the boost topology. The appearance of LEDs allows us to see the feasibility of dimming again.
SCR dimming is the inevitable control method in the process of replacing incandescent lamps with LED lighting. LED lighting products can only find ways to be compatible with them in order to successfully complete energy-saving renovation. However, the dimming mode of the thyristor dimmer is that the cut-off portion provides the sinusoidal cross current waveform of the bulb, so that the power factor of the thyristor dimming bulb is often less than 0.5. But power factor is an important indicator of power efficiency and power quality. No other product can cause such serious damage to power factor and current waveform as thyristor dimmer.
From the current cost structure, the cost of LED dimming technology is still too high. From the perspective of material cost, if the purchase price of non-dimming IC is N yuan, the purchase price of domestic IC with dimming function is 3N-5N yuan, while the import IC is as high as 6N-10N yuan. The reason for the deeper cost impact is that there are more peripheral components of the auxiliary dimming IC, and the current market demand for LED power supplies with dimming function is still small. If the IC is calculated at 18%-25% of the total cost of the LED power supply, the cost of the LED power supply that supports dimming can be imagined.
From the reporter's visit, the current application of LED dimming products in the market is mainly concentrated in the sub-lights below 25W, downlights and bulbs, and the dimming of panel lights is between 30-60W. Rising, compatibility, smooth dimming, and certification requirements are even more prominent.
Unfinished: For more information, please refer to the February issue of Gaogong LED's "LED Good Products" magazine.
"LED lamps are not a simple assembly, we are pursuing the LED drive technology to change the light." Zhang Yimin, general manager of Shenzhen Tianxia Ming Power Co., Ltd. (hereinafter referred to as "Tianxia Ming") said that although there are many LED lighting companies, they are really good. There are not many companies. Why are LED lights glaring? Why does the life expectancy not reach the time promised by the manufacturer? These are all technical problems that LED lighting companies need to solve.
Focus on the consumer experience
At present, consumer terminals talk more about LED lighting to replace incandescent lamps, but in recent years, the delisting policies of incandescent lamps issued by various governments have not brought obvious market benefits to LED lighting, and have not brought about the expected market demand explosion. . The reason is mainly limited by the fact that LED lighting itself still has some technical and cost bottlenecks. For example, incandescent lamps have a large illumination angle, and the cost of LEDs is still high under the same conditions, which is difficult for users to accept.
Although LED lighting technology has made great breakthroughs in recent years, many LED lighting manufacturers have not paid attention to the impact of LED lighting on human comfort. For example, when people work under LED lighting for a long time, their eyes will feel very tired. "In these years, everyone has been paying attention to the life of LEDs, ignoring the damage of LEDs to the human body." Zhang Yimin believes that people can only feel comfortable under natural lighting or artificial lighting without electromagnetic radiation.
At present, LED lighting companies mostly use blue chip and yellow phosphor packaging technology, or obtain white light through remote phosphor technology and adding a fluorescent cover. Although LEDs have been able to achieve energy savings, LED lighting effects are still difficult to match traditional lamps.
Everyone knows that the LED's light efficiency is inversely proportional to the index. How to find the most suitable balance point for the human body will be the focus of subsequent LED lighting research and development.
Domestically, neither the industry nor the relevant regulatory authorities have issued strict LED lighting attenuation and scrapping standards. The international practice is to treat the attenuation by more than 50% as scrapped, but in fact, even if the LED is attenuated to 10%, it can still be lit.
Nowadays, everyone judges that the quality of LED lighting stays more in the life of the product. Tianxia Ming has been paying attention to the change of light by LED drive technology. Through the driving of LED power supplies of different specifications, the final light effect of LED lights is obviously different. The optical, power and heat dissipation structures have a great impact on the efficacy of the LED lamp. At present, 30%-50% of LED lamps sold in the domestic market only stay in the stage of lighting for cost.
"We have been paying attention to the development of LED light source and designing the best LED power solution for a variety of light sources." Zhang Yimin said that the LED light source can maximize the brightness of the lamp bead, and then through the unique dynamic control technology, LED can be realized. The brightness is maximized and the electrical performance of the power supply is fully compliant with the relevant technical specifications of the International Electrotechnical Commission.
"We have already cooperated with Sharp and Cree Research Institute to research LED power solutions specifically for Sharp COB and Cree Lamps." Zhang Yimin said.
Breakthrough in intelligent control technology
LED control technology has been developed from the initial single constant current control to the current thyristor dimming, PWM dimming, segment dimming, DMX512, DALI, ZigBee and other protocol dimming. The control mode has also evolved from the earliest wire-controlled technology to IR, FR, Wi-Fi short-range wireless control and cloud control based on IoT technology.
"LED dimming must break through, otherwise there is no way out." Zhang Yimin believes that LED power dimming can be solved in the next 3-5 years, when the existing LED mode will be completely changed, but not necessarily compatible with thyristor. "The thyristor is not a good product after all. The dimming is to save resources, but in fact the current dimming technology will change the power factor during dimming, causing the grid to waste more resources." Only dimming linearity The degree is very uniform to solve the problem of flicker-free during the dimming process. Zhang Yimin believes.
The traditional thyristor dimmer is mainly used for dimming the incandescent lamp, and the energy-saving lamp itself cannot be dimmed because of the boost topology. The appearance of LEDs allows us to see the feasibility of dimming again.
SCR dimming is the inevitable control method in the process of replacing incandescent lamps with LED lighting. LED lighting products can only find ways to be compatible with them in order to successfully complete energy-saving renovation. However, the dimming mode of the thyristor dimmer is that the cut-off portion provides the sinusoidal cross current waveform of the bulb, so that the power factor of the thyristor dimming bulb is often less than 0.5. But power factor is an important indicator of power efficiency and power quality. No other product can cause such serious damage to power factor and current waveform as thyristor dimmer.
From the current cost structure, the cost of LED dimming technology is still too high. From the perspective of material cost, if the purchase price of non-dimming IC is N yuan, the purchase price of domestic IC with dimming function is 3N-5N yuan, while the import IC is as high as 6N-10N yuan. The reason for the deeper cost impact is that there are more peripheral components of the auxiliary dimming IC, and the current market demand for LED power supplies with dimming function is still small. If the IC is calculated at 18%-25% of the total cost of the LED power supply, the cost of the LED power supply that supports dimming can be imagined.
From the reporter's visit, the current application of LED dimming products in the market is mainly concentrated in the sub-lights below 25W, downlights and bulbs, and the dimming of panel lights is between 30-60W. Rising, compatibility, smooth dimming, and certification requirements are even more prominent.
Unfinished: For more information, please refer to the February issue of Gaogong LED's "LED Good Products" magazine.
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