In this work, low-temperature vulcanized, transparent silane modified epoxy resins for LED filament bulb package were prepared. Firstly, transparent silane modified epoxy resins were produced through a controllable so...In this work, low-temperature vulcanized, transparent silane modified epoxy resins for LED filament bulb package were prepared. Firstly, transparent silane modified epoxy resins were produced through a controllable sol-gel method using γ-(2,3-epoxypropoxy)propytrimethoxysilane and dimethyldiethoxylsilane. The features of the reaction were investigated and the products were characterized in detail. Subsequently, various curing agents were explored to prepare transparent silane modified epoxy resins. The silane modified epoxy resins cured by PEA-230 at a fairly low temperature(40 °C/2 h then 60 °C/1 h) exhibited excellent thermal stability with a thermal degradation temperature as high as 316.5 °C and adjustable hardness between 40-60 shore A. The application tests showed the materials obtained were good candidates for LED filament bulb package.展开更多
设计了一款LED三角玻璃灯丝灯,利用艺术造型玻璃作为散热体与灯泡外壳,加长的LED灯丝光源由43颗芯片串联而成,由市电整流后直接驱动。LED灯丝的两个电极置于单端。用ANSYS有限元方法模拟了此款玻璃球泡灯丝灯在不同平均电流下的LED结温...设计了一款LED三角玻璃灯丝灯,利用艺术造型玻璃作为散热体与灯泡外壳,加长的LED灯丝光源由43颗芯片串联而成,由市电整流后直接驱动。LED灯丝的两个电极置于单端。用ANSYS有限元方法模拟了此款玻璃球泡灯丝灯在不同平均电流下的LED结温,采用正向电压法测量了此款玻璃灯的LED结温,结果表明:加长的LED灯丝可采用单端供电纯阻驱动,所设计的三角玻璃灯丝灯推荐使用的平均电流为10 m A,在此电流下结温为91.2℃,在保证使用寿命的前提下功率比传统灯丝球泡灯提高了25%。展开更多
基金financial support from the Zhejiang Provincial Natural Science Foundation of China (No.Y14E030008)the Commonweal Technology Application Research Project of Zhejiang Province (No.2013C31079)
文摘In this work, low-temperature vulcanized, transparent silane modified epoxy resins for LED filament bulb package were prepared. Firstly, transparent silane modified epoxy resins were produced through a controllable sol-gel method using γ-(2,3-epoxypropoxy)propytrimethoxysilane and dimethyldiethoxylsilane. The features of the reaction were investigated and the products were characterized in detail. Subsequently, various curing agents were explored to prepare transparent silane modified epoxy resins. The silane modified epoxy resins cured by PEA-230 at a fairly low temperature(40 °C/2 h then 60 °C/1 h) exhibited excellent thermal stability with a thermal degradation temperature as high as 316.5 °C and adjustable hardness between 40-60 shore A. The application tests showed the materials obtained were good candidates for LED filament bulb package.
文摘设计了一款LED三角玻璃灯丝灯,利用艺术造型玻璃作为散热体与灯泡外壳,加长的LED灯丝光源由43颗芯片串联而成,由市电整流后直接驱动。LED灯丝的两个电极置于单端。用ANSYS有限元方法模拟了此款玻璃球泡灯丝灯在不同平均电流下的LED结温,采用正向电压法测量了此款玻璃灯的LED结温,结果表明:加长的LED灯丝可采用单端供电纯阻驱动,所设计的三角玻璃灯丝灯推荐使用的平均电流为10 m A,在此电流下结温为91.2℃,在保证使用寿命的前提下功率比传统灯丝球泡灯提高了25%。