5050 LED beads white light advantages and disadvantages

5050LED lamp beads to achieve white light there are three main methods, ZBL for you to analyze one by one.

1. through the LED lamp beads red, green and blue three primary color multi-chip group and luminous synthesis of white light.
Advantages: high efficiency, color temperature control, color rendering is better.
Disadvantages: different light decay of the three primary colors lead to unstable color temperature, control circuit is more complex, the cost is higher.

2. blue LED beads chip excitation yellow phosphor, LED blue light and phosphor issued by the yellow-green light synthesis of white light, in order to improve color performance can also add a small amount of red phosphor or at the same time add the right amount of green, red phosphor.
Advantages: high efficiency, simple preparation, better temperature stability, better color rendering.
Disadvantages: poor consistency, color temperature changes with the angle.

3. UV LED chip excitation phosphor emits three-color synthetic white light.
Advantages: good color rendering, simple preparation.
Disadvantages: at present, 5050LED chip efficiency is low, there is a UV leakage problem, phosphor temperature stability problems to be solved.

Features of UV LED + RGB tricolor fluorescent solution
Advantages: the white coordinate point is only determined by the phosphor itself, independent of the excitation wafer (the discrete nature of the LED wafer can be tolerated). Very high color reproduction index RI is possible, theoretically the simplest manufacturing solution. The stability of the color light depends only on the phosphor and can be very stable.
Disadvantages: Leaking UV light can damage the LED sealant and lead to device life problems. The light conversion efficiency is not high, its own absorption, light transmission, etc.

Features of 5050 LED(Blue)+Phosphor(Yellow) solution
Advantages: Only a single phosphor, relatively simple to manufacture. The phosphor for blue light alone is mature and abundant. The color reproduction of the white light is moderate (RI?75%). The stability of the phosphor can already meet the requirements of color reproduction.
Disadvantages: light conversion efficiency is not high, its own absorption, light transmission, etc.. Color reproduction is not high enough. The stability of the color is greatly affected by the temperature and driving current. The color will change with the observation angle change.

Features of 5050 RGB triple primary color LED color mixing scheme
Advantages: Highest photoelectric efficiency. From the long-term development point of view, this solution will be the mainstream solution. Arbitrary color adjustment is possible. Excellent color rendering ability (RI). Very wide color gamut range.
Disadvantages: complex color-light feedback control is required to compensate for the changing characteristics of the LED5050 material properties with temperature, as well as the light decay characteristics of the LED. The color adjustment is very weird and variable. Thus, the 5050 LED lamp beads white light to achieve the method.

ZBL is engaged in the LED industry for 11 years, has a wealth of experience in LED technology, specializing in the production of a variety of SMD LED beads, high brightness, high-display finger light band, mass production quality assurance and the price is quite affordable, welcome to contact us!