High-power LED lights are in working order, The quality of light beads, and high-power LED is directly related to the heat. Now high-power LED lights are the use of natural cooling heat. The results are unsatisfactory. LED high power light from the LED; Thermal structure; drive; lens component. cooling part is a very important part. cooling high-power LED light directly affects the life and conditions.

1. On the metal cooling substrate, there are aluminum plates and copper substrates, as a professional manufacturer of metal substrate manufacturers, propose that we adopt cost-effective aluminum plate. Copper substrate with a lot of price difference between aluminum plates, copper substrate thermal conductivity in the area is better than aluminum, but the cost and weight, much higher than aluminum, and the proposed aluminum substrate. Furthermore now that some high-power LED manufacturers in the high-power LED lamps add a temperature control switch, and set its temperature, when the temperature is higher than the value here would reduce the current. Drawback is that a number of lights will be dark, but the effect does not play, so the solution is feasible
Temperature protection is necessary, the product not only needs but also for the customer. The number of temperature protection that only appropriate? Calculated under the bar. The maximum temperature in summer 40 ℃, light exposure in summer 50 ℃, 50 ℃ ambient temperature is the actual, see the general high-power LED junction temperature specification can bear 120 ℃, the chip to the aluminum plate thermal resistance specifications generally recommended 10-15 ℃, LED board to ensure that 120-15 = 105 ℃. Well, keep temperature taking 50 - 105 ℃ median 77.5 ℃, normal operating temperature of electronic components is reliable at 85 ℃, 77 ℃ is in line with this principle. Started to protect the proposed 77 ℃, 85 ℃ of a significant reduction of current, 90 ℃ completely finished product temperature protection.

A memorable question: Why does not the temperature not rise up when a small current to control? This allows the user will not feel discomfort, while the temperature has not risen very quickly, not even to high temperatures.
I think the lower current to reduce the heat, without reducing the brightness is not realistic. This will have a 1W and 3W high power LED lamp beads Community practice. That is, where the temperature rose to power when a certain high power from 3W to 1W did not let the temperature down to continue to rise, effectively control the temperature of high power LED problem.
Overall: 1. To improve the luminous efficiency. Are now high-power LED has reached the 50-70LM / W, the direction of development will reach 140lm / W so that later. Imagine that this will radically improve the heat problem. 2. To enhance heat dissipation. This is the case of an efficient solution.
I now own an LED lamp with, used in the bedside lighting. But not the high-power type. Is a white LED to do with themselves. The start current is too large total burning lamp Aberdeen. Increase the cooling effect is not very good hole. Calculations found that current reaches 56mA (two routes, each channel is about 28mA). Was re-calculated current, change components, the control current to 15mA or so, greatly changing the heat. Of course not the same brightness.

I have seen the program is to use high-power lamps, mainly using the aluminum plate, copper substrates economy almost, but can increase the copper heat pipe.
Also increase the fan, although fans of life almost, but better late than for cost-effective LED, and have two fans, with temperature protection, over temperature gradually open the 2 sets of fans, and then also the same time again in over temperature shut down part of the LED, to reduce the total power, in fact, a similar effect and reduce the current.
The so-called high-power LED LED only relative to the previous case, the actual power is not large, generally only 1 ~ 2W. Are superimposed in a multi-chip out, many companies are launching this LED, you have to do Electronic Engineering Times search on the website of the LED, you will find the latest new big Dushi high-power LED LED.
When the LED current is less than 150mA for low-power LED (also known as LED). When the current flowing through the LED is called when the power is greater than 150mA LED (HBLED).
Thermal conductivity of heat pipes can also be considered, there is liquid single-phase and liquid / gas two-phase. If the power of big, this will certainly use. CPU cooling has now begun to use. LED cooling also occasionally see someone.