本文選題：直下式LED背光模組 + LED背光源�。� 參考：《深圳大學》2015年碩士論文

【摘要】：直下式LED背光模組廣泛應用于液晶電視、平板燈、廣告燈箱、警示牌等領(lǐng)域。高性能的直下式LED背光技術(shù)尚未十分成熟,如何提高LED背光源性能、實現(xiàn)背光模組混光距離的進一步降低、提高背光模組的亮度均勻性等問題十分關(guān)鍵,進行相關(guān)方法的研究具有重要意義。本文對雙晶封裝形式的LED背光源和背光透鏡設(shè)計及優(yōu)化方法進行研究,主要完成的工作如下:(1)對單晶和雙晶封裝形式封裝的背光LED光源器件2835進行穩(wěn)態(tài)熱分析和測試,通過兩者分析結(jié)果的比較,發(fā)現(xiàn)雙晶較單晶封裝形式的2835背光光源具有更好的熱學性能。(2)研究雙晶封裝形式2835背光光源的晶隙對燈珠熱學性能的影響,發(fā)現(xiàn)雙晶封裝形式的2835背光光源可以通過控制晶隙得到器件的熱阻最小值。(3)對雙晶和單晶封裝形式2835燈珠的色溫進行模擬仿真分析,探討在相同色溫條件下,雙晶燈珠的熒光粉特性參數(shù)的變化規(guī)律。模擬結(jié)果顯示,要想獲得與單晶LED光源相同的色溫,雙晶LED光源需要增加熒光粉的粒徑或者提高熒光粉的密度。(4)研究雙晶封裝形式2835背光光源的晶隙對燈珠出光量的影響,發(fā)現(xiàn)雙晶封裝形式的LED燈珠可以通過控制晶隙使得LED器件得到最大的光通量值。(5)基于非成像邊緣光線理論和自由曲面的剪切法設(shè)計原理,設(shè)計并優(yōu)化出一款混光距離為20mm的反射式背光透鏡;基于九點測試法,采用面式成像色度計對該透鏡應用于32寸直下式LED液晶背光模組時的情形進行測試,測試結(jié)果基本滿足背光模組對光學性能的主要要求。(6)設(shè)計實現(xiàn)均勻矩形光斑的背光透鏡,從光形通過透鏡整形前后的空間強度分布關(guān)系入手,以多組曲線對應的旋轉(zhuǎn)對稱透鏡在接收面上形成照度均勻的圓形光斑為優(yōu)化目標,將傳統(tǒng)設(shè)計方法需要對面型上離散點優(yōu)化轉(zhuǎn)化為對多組擬合曲線的優(yōu)化,在一定程度上克服了傳統(tǒng)方法由于面型離散點數(shù)量龐大而難于優(yōu)化的問題。
[Abstract]:Straight-down LED backlight module is widely used in LCD TV, flat-panel lamp, advertisement light box, warning sign and so on. The high performance backlight technology of direct-down LED is not very mature. It is very important to improve the performance of LED backlight source, reduce the distance of backlight module and improve the brightness uniformity of backlight module. It is of great significance to study the relevant methods. In this paper, the design and optimization methods of LED backlight and backlight lens in the form of double crystal packaging are studied. The main work is as follows: 1) the steady-state thermal analysis and test of the backlight LED light source device 2835 packaged in single crystal and double crystal package are carried out. By comparing the two results, it is found that the double crystal 2835 backlight source has better thermal properties than the 2835 backlight source with single crystal package.) the influence of the crystal gap of the double crystal package form 2835 backlight source on the thermal properties of the lamp beads is studied. It is found that the 2835 backlight source with double crystal packaging can obtain the minimum thermal resistance of the device by controlling the crystal gap. (3) the color temperature of the double crystal and single crystal package type 2835 lamp beads can be simulated and analyzed, and the same color temperature conditions are discussed. The change rule of phosphor characteristic parameter of double crystal lamp bead. The simulation results show that in order to obtain the same color temperature as the single crystal LED source, the double crystal LED light source needs to increase the particle size of the phosphor or increase the density of the phosphor. It is found that double crystal packaging LED lamp beads can make LED devices get maximum luminous flux value by controlling crystal gap.) based on the theory of non-imaging edge light and the design principle of shearing method of free-form surface, it is found that, A reflective backlight lens with 20mm optical distance is designed and optimized. Based on the nine-point test method, the application of the lens to the 32-inch straight down LED liquid crystal backlight module is tested by using a plane imaging colorimeter. The test results basically meet the main requirements of the backlight module for optical performance. The backlight lens with uniform rectangular spot is designed and realized. The spatial intensity distribution relationship before and after shaping the light form through the lens is introduced. With the objective of forming circular spot with uniform illumination on the receiving surface of the rotating symmetric lens corresponding to the multi-group curve, the traditional design method needs to transform the discrete point optimization on the surface into the optimization of the multi-group fitting curve. To some extent, it overcomes the problem that the traditional method is difficult to optimize because of the large number of surface discrete points.
【學位授予單位】：深圳大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN312.8

【參考文獻】

相關(guān)期刊論文 前3條

1 隋越;;貼片及引腳式LED芯片連接的熱應力應變對比分析[J];長江大學學報(自然科學版);2011年10期

2 喬中蓮;楊東升;劉飛;;大尺寸超薄背光模組研究及產(chǎn)品可行性分析[J];現(xiàn)代顯示;2010年12期

3 錢可元;馬駿;付偉;羅毅;;基于Mie散射理論的白光發(fā)光二極管熒光粉散射特性研究[J];物理學報;2012年20期

相關(guān)博士學位論文 前2條

1 丁毅;自由曲面光學器件的設(shè)計及其在照明系統(tǒng)中的應用[D];浙江大學;2009年

2 王繪凝;InGaN/GaN多量子阱的結(jié)構(gòu)及其光學特性的研究[D];山東大學;2014年

相關(guān)碩士學位論文 前1條

1 梁德娟;高光效側(cè)入式無導光板LED平板燈的研究[D];華僑大學;2014年

，

本文編號：1848114