| 摘要 |
An LED lamp comprises an LED light source module (4) comprising at least one group of LED light source assemblies, and further comprises three driving circuits (701, 702, 703) and a control circuit (6). The LED light source assembly comprises a first LED light source (401), a second LED light source (402) and a third LED light source (403). The first LED light source (401) comprises a first blue light LED chip having a peak wavelength of 445-455nm, green fluorescent powder having a peak wavelength of 500-520nm is coated on the first blue light LED chip, and in the aspect of luminous power, blue light accounts for 0.43-0.57 in the provided blue and green light. The second LED light source (402) comprises a second blue light LED chip having a peak wavelength of 445-455nm, yellow fluorescent powder having a peak wavelength of 557-570nm is coated on the second blue light LED chip, and in the aspect of luminous power, blue light accounts for 0-0.08 in the provided yellow light. The third LED light source (403) comprises a third red light LED chip having a peak wavelength of 624-630nm. The control circuit (6) determines the driving currents of the various LED light sources, and drives the various LED light sources. The LED lamp is adjustable in color temperature, has a special color rendering index R9 of more than 95, and is also low in design and manufacturing costs. |
