本文選題：微磨削 + 熱壓微成型�。� 參考：《機(jī)械工程學(xué)報(bào)》2017年23期

【摘要】：薄壁LED照明依賴絲網(wǎng)印刷的微陣列導(dǎo)光板,但其表面油墨點(diǎn)陣易老化,且微結(jié)構(gòu)很難優(yōu)化。因此,在導(dǎo)光板表面設(shè)計(jì)出高斯分布的空間微槽透鏡陣列,并采用數(shù)控微磨削技術(shù)對(duì)其進(jìn)行加工,替代市面絲網(wǎng)印刷的2D微圓陣列。首先,用微光學(xué)原理模擬導(dǎo)光板導(dǎo)光效率和出光均勻度,優(yōu)化微透鏡陣列的形狀、尺寸和分布。利用金剛石砂輪微尖端在PMMA導(dǎo)光板表面精密磨削出微透鏡陣列,檢測(cè)其導(dǎo)光效率及均勻性。最后,利用微磨削加工的微陣列成型鋼模芯開發(fā)微透鏡陣列的快速熱壓微成型工藝。微光學(xué)分析表明,微槽透鏡陣列比微方形透鏡陣列和微半球透鏡陣列分別提高導(dǎo)光效率6%和15%。而且,微槽透鏡陣列變間距高斯分布比等間距分布提高導(dǎo)光效率32%,提高出光均勻度73%。試驗(yàn)結(jié)果顯示,微磨削可以控制微槽透鏡陣列加工的表面質(zhì)量和形狀精度,應(yīng)用于LED導(dǎo)光板后比絲網(wǎng)印刷的導(dǎo)光板提高導(dǎo)光效率7%和出光均勻度9%。此外,開發(fā)3 s的快速熱壓微成型工藝,可以加工出變間距和變深度的微槽透鏡陣列,比絲網(wǎng)印刷的微圓陣列提高照度26%和出光均勻度49%。因此,微空間結(jié)構(gòu)優(yōu)化的微槽透鏡陣列比絲網(wǎng)印刷的2D微圓陣列可附加出更高的微光學(xué)應(yīng)用價(jià)值。
[Abstract]:Thin-walled LED lighting depends on screen printing of microarray light guide, but its surface ink lattice is easy to aging, and the microstructure is difficult to optimize. Therefore, the spatial microgroove lens array with Gao Si distribution is designed on the surface of the light guide plate, and the NC micro-grinding technology is used to process it instead of the 2D microcircular array printed in the market screen. Firstly, the efficiency and uniformity of the light guide plate are simulated by using the principle of low light level (LLL), and the shape, size and distribution of the microlens array are optimized. The microlens array was precisely ground on the surface of PMMA light guide plate by diamond wheel micro tip, and its light conduction efficiency and uniformity were tested. Finally, the rapid hot pressing microforming process of microlens array is developed by using microarray formed steel die core. The results of microoptical analysis show that the light conduction efficiency of microgroove lens array is improved by 6% and 15% than that of microsquare lens array and microhemispherical lens array, respectively. Moreover, the Gao Si distribution of the microgroove lens array with variable spacing improves the light conduction efficiency by 32 and increases the light uniformity by 73 compared with the equal distance distribution. The experimental results show that micro grinding can control the surface quality and shape accuracy of microgroove lens array. The light guide efficiency and uniformity of light are increased by 7% and 9% than that of screen printed light guide plate after being applied to LED light guide plate. In addition, a rapid hot pressing microforming process of 3 s can be used to fabricate microgroove lens arrays with varying spacing and depth, which can increase illumination by 26% and light uniformity by 49% compared with those of silk-screen printed microarrays. Therefore, the microgroove lens array with optimized microspace structure can add higher value of low light level than 2D microcircular array with screen printing.
【作者單位】： 華南理工大學(xué)機(jī)械與汽車工程學(xué)院;
【基金】：國家自然科學(xué)基金(61475046) 廣州市科技計(jì)劃(201508030012) 廣東省科技計(jì)劃(2014B010104003)資助項(xiàng)目
【分類號(hào)】：TG596;TS871.1

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本文編號(hào)：2006651