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    • 9. 发明申请
    • OPTICAL DEVICE FOR LED-BASED LIGHT-BULB SUBSTITUTE
    • 用于LED灯泡替代品的光学装置
    • WO2004104642A2
    • 2004-12-02
    • PCT/US2004/014938
    • 2004-05-13
    • LIGHT PRESCRIPTIONS INNOVATORS, LLCMINANO, Juan CarlosBENITEZ, PabloPARKYN, William, A.FALICOFF, WaqidiMUNOZ, Fernando
    • MINANO, Juan CarlosBENITEZ, PabloPARKYN, William, A.FALICOFF, WaqidiMUNOZ, Fernando
    • G02B
    • H01L33/54F21K9/232F21K9/233F21K9/61F21V5/04F21V7/0091F21Y2115/10G02B19/0028G02B19/0066G02B19/0071
    • An optical device for coupling the luminous output of a light-emitting diode (LED) to a predominantly spherical pattern comprises a transfer section that receives the LED’s light within it and an ejector atop it that receives light from the transfer section and spreads it spherically. The base of the transfer section is optically coupled to the LED so that the LED’s light goes inside the transfer section, which comprises a compound elliptic concentrator operating via total internal reflection. The ejector section can have a variety of shapes, and can have diffusive features on its surface as well. The device is circularly symmetric, with a height preferably only a few times its diameter. An important application is for use at the focus of the parabolic reflectors in flashlights. This version of the invention further comprises a base-can identical in outer shape and electric contacts to those of flashlight bulbs. Within the can is the current-control circuitry the interfaces the LED with battery voltage. Another version uses half a transfer section at each end of a long cylindrical ejector, illuminated by an LED at both ends. Ejection is via internal scattering by controlled sub-wavelength roughness. In one cylindrical embodiment, diffuse reflectivity varies from one third at the ends to two thirds at center.
    • 用于将发光二极管(LED)的发光输出耦合到主要为球形图案的光学装置包括:接收其内的LED的光的转印部分和在其上方的从喷墨转移部分接收光的喷射器,并将其飞散。 传输部分的基部光学地耦合到LED,使得LED的光进入传输部分内部,传输部分包括通过全内反射操作的复合椭圆聚光器。 喷射器部分可以具有各种形状,并且在其表面上也可以具有扩散特征。 该装置是圆形对称的,其高度优选仅为其直径的几倍。 一个重要的应用是在手电筒抛物面反射器的焦点使用。 本发明的该版本还包括与手电筒灯泡的外形和电接触相同的基座。 电流控制电路中的电流控制电路是LED与电池电压的接口。 另一个版本在长圆柱形喷射器的两端使用半个传输部分,由两端的LED照亮。 喷射是通过受控亚波长粗糙度的内部散射。 在一个圆柱形实施例中,漫反射率从端部的三分之一变化到中心的三分之二。