| 摘要 |
A white LED(light emitting diode) light source module is provided to improve color repeatability and efficiency of phosphor by using a red phosphor and blue and green LED chips having a peak wavelength of a specific range. Blue light, green light and red light are mixed to output white light. The peak wavelength of the blue light is 449-465 nm, the peak wavelength of the green light is 525-540 nm, and the peak wavelength of the red light is 600-700 nm. The red phosphor is nitride-based phosphor of CaAlSiN3:Eu or Ca2Si5N8:Eu or a sulfide phosphor of (Ca,Sr)S:Eu. The blue and green light can be emitted from blue and green LED chips(102,104), respectively. The red phosphor can be included a resin package part(103) for encapsulating the blue LED chip.
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