| 摘要 |
The invention relates to white-light sources based on semiconductor light-emitting diodes with remote photoluminescent converters. Essence of the invention: a lamp comprises a heat-dissipating base with a radiation exit opening, LEDs secured about the periphery of the opening and emitting a primary radiation, and, at a distance from said LEDS, a primary radiation converter in the form of a concave layer of photoluminescent material and a light reflector with a concave light-reflecting surface arranged consecutively on one side of the opening such that the concavities of the radiation converter and the light reflector are oriented towards the LEDs and the exit opening, wherein the lamp further comprises a second radiation converter which is situated on the other side of the opening and is flat or convex. Secondary radiation, generated as the primary radiation strikes the surface of the converter, exits via the opening in the heat-dissipating base and excites the photoluminescent material of the second radiation converter, causing the emission of tertiary radiation, and white light, generated as a result of the combination of the secondary and tertiary radiation, exits the second converter. |
