Products Knowledge
LED(Light Emitting Diode) is one kind of light-emitting device which is a semiconductor material and may illuminate while the current is passing.
Its chemical element belongs to the III- V series ( such as: GaP, GaAs, …etc.)
The principle of LED light emitting is to change the electric energy to the optic energy. That is to switch on the combination of semiconductor, and the electrons are recombined to the electron holes within the device. This result will bring the surplus energy and release it by the type of photon, in order to the effect of lighting. It is one kind of cold light.
LED lighting is superior to the traditional luminous bodies in the advantages of no need of idling time, fast reaction, small volume for easy usage, ultra-low electricity consumption, almost free of pollution, fitted for mass production, high reliability and wide range applications.
1. Technology Introduction :
The products of this sort is the lower reaches of LED industry. They are including the package, the test and experience, the designing and all the applications.
The LED package means to connect the outer wire to the poles of LED chip and form it as a LED device, and then pack them with silicone & other materials in order to protect the chip and enhance its lighting efficiency.
The processing sequence of LED packaging by the manufacturers is Crystalline grain, Die bond, Die attached, Wire bonding, Silicone curing, Tin plating, Shear pins, Distribute bins and Testing.
The parts and components of high power LED lighting products should be proceeded two optic design before they are finished products.
The firs of stage is to make the LED IC chips into the LED light sources. It have to achieve the first optic design in order to settle on the angle of lighting, the strength of illumination, the volume of luminous flux, the range and distribution of color temperature.
This is called the Optimized Design of the Primary Optical System for LED Packages.
The optimized design of the second optical system is only for high power LED lighting products.
This kind of products will get lens with the covers and their lighting angles are different, from 30˚ to 180˚. The second optical design will change the optic characters by the lens for the LED light Source. Simply speaking, the first optical design is to catch more light from the LED chips, and the second optical design is to make the LED devices illuminate as the demand of design.