高準直導光板及高均勻性發光二極體Light-Bar封裝之研究

The Studies of High Collimation Light Guide and High Uniformity LED Light-Bar Package

楊才賢(Tsai-hsien Yang)

指導教授 ： 張乃元

大同大學/電機資訊學院/光電工程研究所/碩士(2007年)

摘要

LCD需要依賴背光模組提供充足且均勻的光源，因此本研究設計新型的Light-Bar封裝，使得LED光源能夠擴散形成一個擴光結構，分別為Ellipse type及Bat type，並探討在導光板上製作一個圓錐陣列，使其具有高準直性。
經由光學模擬軟體LightTools模擬Ellipse type之後，得知當摻入5um的beads 20000顆時，其擴散角度是71.3542度，得到的擴散角度最大；再經由基因演算法，尋找Bat type的a和d值，其最佳a值為2.828 mm，d值為0.0234 mm，及最大的擴散角度為77.1625度，而出光效率也有達到百分之九十以上。經由光學模擬軟體TracePro模擬之後，得知在導光板上製作圓錐陣列，可以使導光板形成一個具有高準直性的導光板。

關鍵字

背光模組 ； 導光板

並列摘要

Liquid crystal display requires a well light source which is adequate and uniform light, so the backlight of liquid crystal display becomes the significant module. We have new designs for backlight which are LED Light-Bar package design to spread the LED light source and light guide design to collect more output light to be high collimation light guide. Light-Bar designs have two types which are ellipse type and bat type.
We get the maximum extended angle for ellipse type of Light-Bar cell from optical simulation software, LightTools. The maximum extended angle is 71.3542 degrees and the transmission efficiency is over 90 percent when the radius of the beads is 5 um and the number of beads is 20000. We use the Genetic Algorithm and optical simulation software, LightTools, to find the optimum values which are “a” and “d”. We get the maximum of the extended angle to be 77.1625 degrees in the bat type when the optimal value of “a” and “d” are 2.828 and 0.0234 mm, and the transmission efficiency is also over 90 percent. We make high collimation light guide which is grew cone array collect more output light off the normal axis depending on optical simulation software, TracePro, and increase collimation of the exiting angle of light guide.

並列關鍵字

light guide ； Light-Bar ； backlight

參考文獻

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