High-power LED white light application and LED chip cooling solution

In today's high-power LED white light products, we are increasingly worried about the heat dissipation of LED chips .

Today's LED white light products are gradually being put into use in various fields, people are feeling the amazing pleasure brought by their high-power LED white light and are also worried about the practical problems of their existence!

First of all, from the nature of high-power LED white light itself. High-power LEDs still have poor uniformity of illumination, and the life of the sealing materials is not long. Especially, the heat dissipation problem of LED chips is difficult to be solved well, and the application advantages of white LEDs cannot be exerted.

Secondly, from the market price of high-power LED white light. Today's high-power LEDs are still a kind of aristocratic white light products. For example, the average price of 40 high-power LEDs is RMB 1,674. All high-power white LED products are not used by anyone who wants to use them.

In recent years, with the efforts of industry experts, several improvements have been proposed for the heat dissipation of high-power LED chips:

1. Increase the amount of luminescence by increasing the area of ​​the LED chip.

2. Pack several small-area LED chips.

3. Change LED packaging materials and fluorescent materials.

So is it possible to completely improve the heat dissipation problem of high-power LED white light products through the above three methods? It’s awesome! First of all, although we increase the area of ​​the LED chip, we can get more luminous flux (the amount of light per unit area of ​​light per unit area is the luminous flux, the unit of ml), we hope to achieve the white light effect we want, but because of its actual The area is too large, which leads to some counterproductive phenomena in the application process and structure.

So is it true that the high-power LED white light cooling problem can't be solved? Of course it is not impossible to solve. In response to the negative problem of simply increasing the wafer area, LED white light manufacturers have improved from the surface of high-power LED wafers by improving the electrode structure and flip-chip structure by using several small-area LED chips. /W's high luminous flux has low luminous efficiency.

In fact, there is another way to effectively improve the heat dissipation of high-power LED chips. That is to replace the white plastic packaging material with silicone or plexiglass. Replacing the packaging material can not only solve the heat dissipation problem of the LED chip, but also improve the life of the white LED. I want to say that almost all high-power white LED products like high-power LED white light should use silicone as the packaging material.

Of course, in the actual production and life, there will be many problems such as heat dissipation of high-power LED white light chips, because the more widely used applications of high-power LED white light, the more difficult problems will be solved!