If the consumers to describe the perfect light source characteristics, then you might hear in their description requires the lowest energy light output and color adjustable, long time to use a variety of desirable characteristics. Minimum input energy is efficiently input power is converted to lumen output, called efficacy; adjustment related to the dimming of light output with less light brightness, or may be regulated to increase the color of the lighting equipment, so as to simulate daytime relative to the status of the night; and by adjusting the bias current flowing through the LED light led test output can be maintained in a longer service life during.
Incandescent lamps with energy efficiency is low and the service life is shorter; sodium lamps provide color choices are few and short life; less fluorescent lamps dimmable choice selection, service life is short. High brightness LED lights, which claims to have a good energy efficiency, long service life, easy to choose the color and dimming control and no ultraviolet (UV) rays. Thanks to intelligent control device design or LED driver electronics, the advantages of these claims have now been realized. Intelligent LED driver can be adjusted for brightness decay in use during the period, provides the driving characteristics to adjust the color and alternative sorting (binning) to obtain the desired color and brightness of the LED: the by using spectral tuning for different LED system led test to get the The desired color and brightness.
The spectral tuning mixing several kinds of LED spectral energy distribution, such as the appropriate mix of red, green, and blue LED can produce white light. This RGB combination is also used to generate almost all colors of light. If the LED drive is not designed for adjusting a set of different LEDs, the designer must select from the separation of the LED in order to produce a specific color. Sorting manufacturers based on light-emitting lumens and color LED classification process, the example of Figure 1 shows a group of industry-standard LED classification criteria.
Sort by plotting rectangular area on the chromaticity diagram. A group containing the LED of the same class will be similar in color and brightness characteristics. However, in a large office or factory led test environment contains many lighting equipment, different classes may still result in uneven light color in a group of large-scale lighting equipment is obvious. Separation of LED design does not provide the method of changing the illumination device color; use the feedback to the tuning system and a set of different colors of LED spectral characteristics of the different LED compensating illumination system, it can be established in an office environment, so that the entire space uniform light. Spectral tuning can also compensate for other effects, such as the edge of the room window outward natural light or reflected into the room corridor lighting.
