Uncovering the advantages of LED and the shortcomings of the LED industry: Structural design is seriously lagging behind

LED industry shortcoming: serious lag in structural design

The high price of LED products is an obstacle to popularization. The price factor determines the cost performance. Whether the advantages and prices of lamps can be accepted by the public is one of the important factors affecting the replacement of traditional lamps by LED lamps .

LED chips With the increase in technology and quantity, the use of larger-sized LED wafer manufacturing technology will continue to reduce costs. In recent years, the rate of reduction has been 20% per year. In the price factor of LED chips, the improvement of light efficiency should also be included in the price reduction. The same price buys better products. The proportion of LED chips at 15% is still very reasonable, and it will continue to maintain this level in the future.

LED packaging costs account for a considerable proportion of the price, about 50%, so we must choose a more suitable packaging structure. The existing packaging of Cree , Lumileds, and OSRAM does not meet the design needs of lamps, and the design cost will remain high. Bold innovative design is the way out for product design. Most of us still copy the packaging structure thinking of large companies, with too little innovation and insufficient confidence in our own innovation. COB is the mainstream way of lamp design in the future. COB packaging is required according to the optical requirements of lamps, while reducing the cost of secondary optical design. It is more reasonable for the packaging cost to be 20-30% of the total cost of lamps.

The actual cost of LED chips is only 15%, and the other costs mainly come from packaging, heat dissipation, structural costs, and power supply . From the perspective of cost composition, reducing the cost of lamps is in the manufacturing stage. Simply requiring the LED chips to be reduced will not have much effect. Lamp manufacturing requires a reasonable overall price and reasonable planning. Simply requiring a certain part to be cheap will not have much effect. Instead, the overall structure of the lamp we design must be economical and the most important thing is to optimize it.

At present, the design accounts for about 20% of the cost of the lamp, which is a bit high. With the development of technology, the power supply is about 5-10%, which is the most reasonable. The actual heat dissipation design is very simple, and it focuses on two directions: first, the shorter the path between the LED chip and the LED external heat dissipation device, the better the heat dissipation design; second, the heat dissipation resistance, that is, there must be enough heat dissipation transmission path and also enough "heat dissipation road". This part of the cost is mainly in the structure, and the cost for heat dissipation is not much. The heat dissipation cost should be maintained at 20%. The hardworking people of China have always set prices very low, and 20% of the cost is considered reasonable. The biggest problem is how to be more innovative and design more reasonably. Structural design accounts for about 10% of the LED power supply in the lamp. It is the weakest link of LED lamps, seriously lagging behind the development of LED lamps, and the quality needs to be improved.

What are the advantages of LED compared to other common light sources?

The inherent characteristics of LEDs (light emitting diodes) determine that they have certain advantages.

1. Small size

LED is basically a small chip encapsulated in epoxy resin, so it is very small and very light.

2. Low power consumption LED consumes very little power. Generally speaking, the working voltage of LED is 2-3.6V. The working current is 0.02-0.03A. That is to say, the power

it consumes generally does not exceed 0.1W.

3. Long service life:

Under appropriate current and voltage, the service life of LED can reach 100,000 hours.

4. High brightness , low heat.

Less heat radiation than HID or incandescent lamps.

5. Environmentally friendly

LEDs are made of non-toxic materials, unlike fluorescent lamps that contain mercury and cause pollution. LEDs can also be recycled.

6. Sturdy and durable

LED is completely encapsulated in epoxy resin, which is stronger than light bulbs and fluorescent tubes. There are no loose parts in the lamp body. These characteristics make LED not easy to damage.

7. Strong controllability.

It is easy to achieve color changes and brightness changes, and the response is fast.