Theories About Color Part1: CIE Color Systems
The eye has three types of receptors (cones) on the retina. These differ in their spectral sensitivity. One type reacts with special sensitivity to red-orange (x), the second type to green (y) and the third type to blue (z-). This allows “standard spectral functions” to be assigned to the eye. In order to vividly represent [...]
Importance of LED Test Methods and the Standard of LED
In order to develop the LED lighting technology, developed countries have attached great importance to the test methods and the standard research of LED. For example the American National institute of Standards and Technology (NIST) organized the international well-known test experts to conduct the LED testing research and mainly studied LED lighting characteristics, temperature characteristic [...]
The Development of Multi-chip LED Lamp
In recent years, the development of multi-chip LED lamp or LED lamp with more tube combination have grown very quickly. However there is no domestic and foreign testing method (LED test) which is specific to LED lamp. As a kind of lighting application product, it has the relevant measurement standard set by International Electrotechnical Commission [...]
To Improve the Luminous Efficiency
To improve the luminous efficiency and the power of LED used for lighting is one of the key problems of the industrial development at present. At the same time, the and shell heat dissipation problems are particularly important. Generally we use the led thermal resistance , shell temperature and junction temperature to represent. At present, [...]
