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    • 48. 发明授权
    • Non-radiatively pumped wavelength converter
    • 非辐射泵浦波长转换器
    • US08455903B2
    • 2013-06-04
    • US13264817
    • 2010-04-19
    • Catherine A. LeatherdaleCraig R. Schardt
    • Catherine A. LeatherdaleCraig R. Schardt
    • H01L33/00
    • H01L27/156H01L33/502
    • A light source comprises an electroluminescent device that generates pump light and a wavelength converter that includes an absorbing element for absorbing at least some of the pump light. A first layer of light emitting elements is positioned proximate the absorbing element for non-radiative transfer of energy from the absorbing element to the light emitting elements. At least some of the light emitting elements are capable of emitting light having a wavelength longer than the wavelength of the pump light. In some embodiments the electroluminescent device is a light emitting diode (LED) that has a doped semiconductor layer positioned between the LED's active layer and the light emitting elements. The first doped semiconductor layer may have a thickness in excess of 20 nm. A second layer of light emitting elements may be positioned for non-radiative energy transfer from the first layer of light emitting elements.
    • 光源包括产生泵浦光的电致发光器件和包括用于吸收至少一些泵浦光的吸收元件的波长转换器。 第一层发光元件位于吸收元件附近,用于将能量从吸收元件非辐射传递到发光元件。 至少一些发光元件能够发射波长比泵浦光的波长长的光。 在一些实施例中,电致发光器件是发光二极管(LED),其具有位于LED有源层和发光元件之间的掺杂半导体层。 第一掺杂半导体层可以具有超过20nm的厚度。 可以定位第二层发光元件用于从第一层发光元件的非辐射能量传递。
    • 49. 发明授权
    • Light generating device having double-sided wavelength converter
    • 具有双面波长转换器的发光装置
    • US08350462B2
    • 2013-01-08
    • US13141638
    • 2009-12-10
    • Catherine A. LeatherdaleAndrew J. OuderkirkTommie W. Kelley
    • Catherine A. LeatherdaleAndrew J. OuderkirkTommie W. Kelley
    • H05B33/14
    • H01L33/08
    • A light emitting device includes a wavelength converter attached to a light emitting diode (LED). The wavelength converter may have etched patterns on both the first and second sides. In some embodiments the first and second sides of the converter each include a respective structure having a different width at its top than at its base. The wavelength converter may include a first photoluminescent element substantially overlying a first region of the LED without overlying a second region of the LED, while a second photoluminescent element substantially overlies the second region without overlying the first region. In some embodiments a passivation layer is disposed over the etched pattern of the first side. A window layer may be disposed between the first and second photoluminescent elements, with non-epitaxial material disposed on first and second sides of one region of the window layer.
    • 发光器件包括附接到发光二极管(LED)的波长转换器。 波长转换器可以在第一侧和第二侧都具有蚀刻图案。 在一些实施例中,转换器的第一和第二侧各自包括在其顶部具有与其底部不同的宽度的相应结构。 波长转换器可以包括基本上覆盖LED的第一区域而不覆盖LED的第二区域的第一光致发光元件,而第二光致发光元件基本上覆盖第二区域而不覆盖第一区域。 在一些实施例中,钝化层设置在第一侧的蚀刻图案之上。 窗口层可以设置在第一和第二光致发光元件之间,其中非外延材料设置在窗口层的一个区域的第一和第二侧上。