| 摘要 |
A uniform high, brightness light source (100) is provided using a plurality of light emitting diode LED chips (102) with slightly different pump wavelengths with a wavelength converting element (110) that includes at least two different wavelength converting materials that convert the light to different colors of light. The intensity of the light produced by the LED chips (102) may be varied to provide a tunable CCT white point. The wavelength converting element (110) may be, e.g., a stack (111, 112, 113) or mixture (114) of phosphor or luminescent ceramics. Moreover, the manufacturing process of the light source (100) is simplified because the LED chips (102) are all manufactured using the same technology eliminating the need to manufacture different types of chips. |
