Analysis of some basic points of LED optical design

Introduction: LED is a point light source, different from the current energy-saving lamps or incandescent lamps on the market. As the name suggests is a light point light, this light also has another important feature, that is only one direction of light (all the traditional back reflector for LED itself does not have any meaning). If we want to use this special light to do lighting, there must be some processing in this light, we can achieve our objective and requirement, so we need to add to the optical design, the relative concentration of the point light source into light with a certain angle, this also is the familiar strawhat LED. Strawhat LED is a package for professional lighting design, on the one hand, it can make the light source light into a certain angle from a central point source, on the other hand, it has less attenuation effect, while allowing more light transmission out with us.

Although the strawhat LED has been a qualitative leap in the optical point of view, but we are familiar with the surface light source is relatively speaking, it is still a point light, because the brightness is too concentrated, if the eyes look directly at the light source, or will cause some harm to our eyes. So in LED lighting applications in domestic lighting, we will further into the light treatment, and then increase the optical design, and achieve the purpose of human can be directly observed at the same time, downy light, on the other hand again to enlarge its irradiation angle, although the strawhat LED itself has done 120 degrees, but if applied directly to home lighting, our impression is shown on the roof is a dark, we want to use the outside lighting transparent cover the light once again spread out, so as to adapt to the normal home lighting.

The difference between high power and low power LED

With the continuous development of LED technology, people adapt to large area lighting research and development of a single LED chip power increasing, currently the world's most cutting-edge can already do a single LED power is more than 200W, although the power can be large, but its price is poor. Here we take a few common LED as an example to do an analysis.

Is widely used in the industry is the single 0.06W power, the maximum brightness can be calculated according to the 7LM, we will do the ordinary 6LM, if you want the power of 1W, we need to use the same 17 LED, the total brightness of 17*6=102LM, that can do 100LM/W, if we use a single chip for the power of the 1W, the output of the highest brightness is 80LM. It is commonly used in general about 60LM, this is a major difference between the brightness, thus, for family use, we still have to choose the suitable small power LED.

From the perspective of product cost, high power LED low power cost is higher than the cost of it from two aspects, one is the LED itself cost, two is a high power LED with aluminum fins, small power as long as the ordinary circuit board, and the natural heat can meet the requirements.

From the day after the cost of maintenance products, if our lamp is in trouble, you can find any home appliance repair shop to replace the damaged LED, a 0.06W LED cost up to 1 yuan, plus the maintenance fee is not more than 5 yuan, if the replacement of 1 1W LED, LED cost will be 8 yuan, plus maintenance costs will be around 15 yuan. And relatively speaking, a small power market LED can be purchased on any electronic market, the power is not necessarily where you can buy. LED to power is a trend in the market, but also the future development of the mainstream, but because of the current technology fails to achieve the desired results, from a technical perspective, it is not suitable for home lighting.