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    • 1. 发明公开
    • LED DOME WITH INNER HIGH INDEX PILLAR
    • LED-KUPPEL MITINNENSÄULEMIT HOHEM BRECHUNGSINDEX
    • EP3033775A1
    • 2016-06-22
    • EP14752409.4
    • 2014-07-02
    • Koninklijke Philips N.V.
    • LOPEZ, ToniVAMPOLA, Kenneth
    • H01L33/54H01L33/58H01L33/00H01L33/56
    • H01L33/58H01L33/0079H01L33/502H01L33/507H01L33/54H01L33/56H01L33/60H01L2933/0058
    • Affixed over a transparent growth substrate (34) of an LED die (30) is a transparent rectangular pillar (40), having a footprint approximately the same size as the LED die. The pillar height is greater than a length of the LED die, and the pillar has an index (n) approximately equal to that of the substrate (e.g., 1.8), so there is virtually no TIR at the interface due to the matched indices. Surrounding the pillar and the LED die is a lens portion (42) having a diameter between 1.5-3 times the length of the LED die. The index of the lens portion is about 0.8 times the index of the substrate. The lens portion may have a dome shape (46). A large portion of the light exiting the substrate is internally reflected off the lateral pillar/cylinder interface and exits the top surface of the pillar. Thus, the emission is narrowed and light extraction efficiency is increased.
    • 贴合在LED管芯(30)的透明生长衬底(34)上的是具有与LED管芯大致相同的尺寸的透明矩形柱(40)。 支柱高度大于LED芯片的长度,并且柱子的折射率(n)大致等于基板的折射率(例如1.8),所以由于匹配的指数,界面上几乎没有TIR。 所述支柱和所述LED模具周围是直径在所述LED芯片的长度的1.5-3倍之间的透镜部分(42)。 透镜部分的折射率是基板指数的0.8倍。 透镜部分可以具有圆顶形状(46)。 离开衬底的大部分光从侧柱/圆柱体界面内部反射离开柱的上表面。 因此,发射变窄,光提取效率提高。
    • 4. 发明公开
    • LED WITH SCATTERING FEATURES IN SUBSTRATE
    • LED在基板上具有散射特性
    • EP2997606A1
    • 2016-03-23
    • EP14726207.5
    • 2014-05-05
    • Koninklijke Philips N.V.Philips GmbH
    • VAMPOLA, KennethBECHTEL, Hans-Helmut
    • H01L33/02H01L33/50
    • H01L33/60H01L33/02H01L33/36H01L33/501H01L33/502H01L33/507H01L33/508H01L2933/0091
    • In one embodiment, the transparent growth substrate (38) of an LED die is formed to have light scattering areas (40A-C), such as voids formed by a laser. In another embodiment, the growth substrate is removed and replaced by another substrate that is formed with light scattering areas. In one embodiment, the light scattering areas are formed over the light absorbing areas of the LED die, to reduce the amount of incident light on those absorbing areas, and over the sides (42A, 42B) of the substrate to reduce light guiding. Another embodiment comprises a replacement substrate may be formed to include reflective particles in selected areas where there are no corresponding light generating areas in the LED semiconductor layers such as—type metal contacts (28). This prevents reabsorption into absorbing regions of the semiconductor layer thereby enhancing external efficiency of the device. A 3D structure may be formed by stacking substrate layers containing the reflective areas. The substrate may be a transparent substrate or a phosphor tile (20) that is affixed to the top of the LED.
    • 在一个实施例中,LED管芯的透明生长衬底(38)形成为具有光散射区域(40A-C),例如由激光形成的空隙。 在另一个实施例中,生长衬底被移除并且被形成有光散射区域的另一衬底替换。 在一个实施例中,光散射区域形成在LED管芯的光吸收区域上方,以减少在这些吸收区域上以及衬底的侧面(42A,42B)上的入射光的量,以减少光引导。 另一个实施例包括替代衬底可以被形成为包括在LED半导体层中没有对应的光产生区域的选定区域中的反射颗粒,例如类型金属触点(28)。 这防止了重吸收到半导体层的吸收区域,从而提高了器件的外部效率。 3D结构可以通过堆叠包含反射区域的衬底层来形成。 衬底可以是固定到LED顶部的透明衬底或磷光体瓦片(20)。
    • 7. 发明授权
    • LED WITH SCATTERING FEATURES IN SUBSTRATE
    • LED MIT STREENCLEMENTEN IN EINEM SUBSTRAT
    • EP2997606B1
    • 2016-07-13
    • EP14726207.5
    • 2014-05-05
    • Koninklijke Philips N.V.Philips GmbH
    • VAMPOLA, KennethBECHTEL, Hans-Helmut
    • H01L33/02H01L33/50
    • H01L33/60H01L33/02H01L33/36H01L33/501H01L33/502H01L33/507H01L33/508H01L2933/0091
    • In one embodiment, the transparent growth substrate (38) of an LED die is formed to have light scattering areas (40A-C), such as voids formed by a laser. In another embodiment, the growth substrate is removed and replaced by another substrate that is formed with light scattering areas. In one embodiment, the light scattering areas are formed over the light absorbing areas of the LED die, to reduce the amount of incident light on those absorbing areas, and over the sides (42A, 42B) of the substrate to reduce light guiding. Another embodiment comprises a replacement substrate may be formed to include reflective particles in selected areas where there are no corresponding light generating areas in the LED semiconductor layers such as—type metal contacts (28). This prevents reabsorption into absorbing regions of the semiconductor layer thereby enhancing external efficiency of the device. A 3D structure may be formed by stacking substrate layers containing the reflective areas. The substrate may be a transparent substrate or a phosphor tile (20) that is affixed to the top of the LED.
    • 在一个实施例中,LED管芯的透明生长衬底形成为具有光散射区域,例如由激光形成的空隙。 在另一个实施方案中,生长衬底被去除,并被由光散射区域形成的另一个衬底代替。 在一个实施例中,光散射区域形成在LED管芯的光吸收区域上方,以减少这些吸收区域上的入射光的量,并且在衬底的两侧以减少光引导。 替代基板可以形成为在选定区域中包括反射粒子。 可以通过堆叠包含反射区域的衬底层来形成3D结构。 衬底可以是固定到LED的顶部的透明衬底或荧光砖。