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    • 3. 发明授权
    • Light emitting system with high extraction efficency
    • 具有高提取效率的发光系统
    • US07250635B2
    • 2007-07-31
    • US10773943
    • 2004-02-06
    • Ho-Shang LeeAlexander Birman
    • Ho-Shang LeeAlexander Birman
    • H05B33/22
    • H01L33/24H01L33/08H01L2933/0083
    • In an epitaxial structure of a solid state lighting system, electrical current injection into the active layer is used to excite the photon emission. The present invention employs a unique waveguide layer in the epitaxial structure for trapping the light generated by the active layer in the fundamental waveguide mode. Multiple photonic crystal regions located either outside or inside one or more current injection regions extract photons from the waveguide layer(s). This novel design optimizes the interplay of electrical pumping, radiation and optical extraction to increase the optical output to several times that of conventional LEDs. A transparent and conductive ITO layer is added to the surface of an epitaxial structure to reduce the interface reflection in addition to functioning as a current spreading layer. The present invention creates solid state lighting with high optical output and high power efficiency.
    • 在固态照明系统的外延结构中,使用注入有源层的电流来激发光子发射。 本发明在外延结构中采用独特的波导层,用于将有源层产生的光俘获在基波导模式中。 位于一个或多个电流注入区域的外部或内部的多个光子晶体区域从波导层提取光子。 这种新颖的设计优化了电泵浦,辐射和光学提取的相互作用,将光输出增加到常规LED的几倍。 除了用作电流扩散层之外,将透明且导电的ITO层添加到外延结构的表面以减少界面反射。 本发明产生具有高光输出和高功率效率的固态照明。
    • 4. 发明申请
    • Light emitting system with high extraction efficency
    • 具有高提取效率的发光系统
    • US20050173717A1
    • 2005-08-11
    • US10773943
    • 2004-02-06
    • Ho-Shang LeeAlexander Birman
    • Ho-Shang LeeAlexander Birman
    • H01L21/00H01L33/08H01L33/24H01L33/00
    • H01L33/24H01L33/08H01L2933/0083
    • In an epitaxial structure of a solid state lighting system, electrical current injection into the active layer is used to excite the photon emission. The present invention employs a unique waveguide layer in the epitaxial structure for trapping the light generated by the active layer in the fundamental waveguide mode. Multiple photonic crystal regions located either outside or inside one or more current injection regions extract photons from the waveguide layer(s). This novel design optimizes the interplay of electrical pumping, radiation and optical extraction to increase the optical output to several times that of conventional LEDs. A transparent and conductive ITO layer is added to the surface of an epitaxial structure to reduce the interface reflection in addition to functioning as a current spreading layer. The present invention creates solid state lighting with high optical output and high power efficiency.
    • 在固态照明系统的外延结构中,使用注入有源层的电流来激发光子发射。 本发明在外延结构中采用独特的波导层,用于将有源层产生的光俘获在基波导模式中。 位于一个或多个电流注入区域的外部或内部的多个光子晶体区域从波导层提取光子。 这种新颖的设计优化了电泵浦,辐射和光学提取的相互作用,将光输出增加到常规LED的几倍。 除了用作电流扩散层之外,将透明且导电的ITO层添加到外延结构的表面以减少界面反射。 本发明产生具有高光输出和高功率效率的固态照明。