LED general lighting market will be eliminated

The reason why the LED general lighting market is full of people's appetites is due to the following three aspects. First, its market is large enough. Second, at the end of this year or early next year, the first year of the LED general lighting market will come. That is, the ratio of LED lighting fixtures to total lighting fixtures will exceed 10%. Third, the market for incandescent, fluorescent and energy-saving lamps is basically monopolized by a few suppliers. LED lighting fixtures produced by these large fixture suppliers today are different. Only about 10% of the total lighting market, that is, LED general lighting market is not yet a monopoly market, we all have the opportunity to play inside.

However, most LED chip suppliers today are in danger of going out of business because the low-voltage LED chips they produce today will be increasingly difficult to sell into the LED general lighting market. Why? Because high-voltage LEDs appear, high-voltage LEDs have two distinct competitive advantages over low-voltage LEDs:

First, at the same output power, high-voltage LEDs require much lower drive current than low-voltage LEDs. For example, Epistar's high-voltage, blue light 1W LED has a forward voltage drop of up to 50V, which means that it can output 1W with only 20mA of drive current, while a 1W LED with a normal forward voltage drop of 3V requires 350mA of drive current. Can output 1W power, so the output power of the high-voltage LED in the work of power dissipation is much lower than the low-voltage LED, which means that the cost of aluminum heat sink can be greatly reduced.

Second, high-voltage LEDs can significantly reduce the loss of AC-DC conversion efficiency. Taking 10W output power as an example, if a 1W high voltage LED with a forward voltage drop of 50V is used, the output can be configured with 2 and 4 strings, and the forward voltage drop of 4 series LEDs is 200V, which means that only from the city Electricity 220V AC (AC) using bridge rectifier and drop 20V on it. However, if we use a 1W low voltage LED with a forward voltage drop of 3V, even if the forward voltage drop of 10 strings is not more than 30V, it means that we need to step down from 220VAC to 30VDC. We know that the lower the differential pressure between input and output, the higher the conversion efficiency from AC to DC. It can be seen that if a high voltage LED is used, the efficiency of the transformer can be greatly improved, which can greatly reduce the power loss during AC-DC conversion. A reduction in heat consumption can further reduce the cost of the heat sink.

Therefore, if high-voltage LEDs are used to develop LED general lighting products, the overall power consumption can be greatly reduced, thereby greatly reducing the design requirements for heat-dissipating housings. For example, we can meet the heat dissipation requirements of LED lamps with a thinner, lighter aluminum housing. Since the cost of the heat-dissipating aluminum housing is one of the major cost components of the LED lighting, the cost reduction of the aluminum housing also means that the overall cost of the LED lighting is effectively reduced.

It can be seen that high-voltage LEDs can bring about an effective reduction in the cost and weight of LED lighting fixtures, but its more important significance is to significantly reduce the design requirements of the cooling system, which effectively clears the largest LED lighting fixtures into the indoor lighting market. Technical obstacles. Therefore, high-voltage LEDs will dominate the future of the LED general lighting market.