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发明授权
CN101257014B 改进了颜色表现性的LED白光源 失效 - 权利终止

改进了颜色表现性的LED白光源
摘要：
本发明提供一种光源，其产生具有输出光谱的光。光源包括第一、第二LED和被来自第一LED的光所激发的磷光体层。磷光体层被定位成将来自第一LED的光的一部分转换成具有磷光体光谱的光。第二LED发射第二LED光谱的光。第一LED和第二LED被通电，使得输出光谱包括第一LED光谱、第二LED光谱和磷光体光谱，并且使得与第一LED光谱或第二LED光谱或磷光体光谱相比，输出光谱在450nm和650nm之间随波长变化的强度更加恒定。本发明可以提供改进了颜色表现性的白色LED光源。
摘要（英）：

A light source that generates light having an output optical spectrum is disclosed. The light source includes first and second LEDs and a layer of phosphor that is excited by light from the first LED. The layer of phosphor is positioned to convert a portion of the light from the first LED in a first LED optical spectrum to light having a phosphor spectrum. The second LED emits light in a second LED optical spectrum. The first and second LEDs are powered such that the output optical spectrum includes the first and second optical spectrums and the phosphor spectrum such that the output spectrumis more constant as a function of wavelength at wavelengths between 450 nm to 650 nm than the first or second optical spectrums or the phosphor spectrum. The invention can provide a white LED light source with improved color rendering.

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