So use this solution to produce LED lamps like LED light bulbs, the power cost is high, the heat dissipation component cost is also high. At the same time, it also caused the current LED lighting products in use is often droop too quickly.
Now high power chip prices has been reduced to a few cents a, small power chip prices is only a few cents a, companies have completely before there is no need to follow the old way. If work at small current density, lamps and lanterns can low-cost power supply using high voltage, low current, the ac/dc conversion efficiency is high, the chip also has a high luminous efficiency, smaller chip at the same time operating voltage, and temperature become low, high efficiency, good reliability, high phosphor light conversion efficiency. So use this solution to produce LED lamps and lanterns, the power cost is lower, heat dissipation component cost will become low.
Current density lower, of course, to achieve the same lights, need to use more chips. But with the reduction of operating current density of chip light-emitting layer also reduces the number of quantum well demands, chip changes in plants could also reduce the manufacturing cost, it is also a kind of benign circulation. Therefore, which requires the coordinated development of the LED lighting industry chain each link, around a small current density of the technical route of more efforts, appropriate is multi-purpose chip, reduce the demanding requirements of lamps and lanterns of power and heat dissipation. So, in keeping the lamps and lanterns of total manufacturing costs under the condition of little change, LED the luminous efficiency of lamps and lanterns and reliability will be further promoted.