LED lighting has received wide attention as a new generation of lighting. Simply relying on LED packaging does not make good lighting fixtures. This article mainly introduces LED lighting from electronic circuit, thermal analysis and optics. Firstly, it introduces LED lighting design .
With the increasing attention to the environment in recent years, LED lighting has received extensive attention as a new generation of lighting. At the exhibition, as long as the booths related to LED lighting are crowded, LED lighting is also appearing in our daily lives. LED lamps that can be consumed by ordinary households are bulb-type LED lamps sold by major lighting manufacturers. In addition, many companies have also developed fluorescent LED lamps. In this case, more companies are bound to participate in the LED lighting industry.
LED lights have different characteristics from traditional light sources such as incandescent lamps and fluorescent lamps. Simply relying on LED packaging does not make good lighting fixtures. In order to design a better LED lighting fixture, the correct optical design of the LED must be distinguished from the conventional light source.
This article introduces the design of LED lighting fixtures. Specifically, it is mainly explained from the aspects of electronic circuits, thermal analysis, and optics. The first is the outline of LED lighting and its difference from the light source to date.
LED lighting
The LEDs used for illumination are mostly white. LED lighting relies heavily on the invention of blue LED chips and improved luminous efficiency.
There are two main ways to implement white LEDs. One is to use LED chips and phosphors, and the other is to use RGB 3-color LED chips. At present, the first method is mainly adopted.
The use of phosphors is generally done by coating a yellow phosphor on a blue LED chip. When the blue light emitted from the LED chip encounters the phosphor, part of the light is converted into yellow light. This part of the converted yellow and blue light is mixed together and becomes white light. The color temperature of the white LED can be controlled by adjusting the amount of the phosphor, so the color of the light is determined at the time of production, and cannot be adjusted later.
At the same time, if the blue light and the yellow light are mixed, the color rendering property is poor due to insufficient red and green components. In this way, color rendering can be improved by mixing red and green phosphors in the blue LED chip or RGB phosphors in the ultraviolet LED chip.
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