CAJ | 학술논문

为了提高COB LED的取光率，以1919 COB LED为研究对象，建立阵列式圆锥透镜、半椭球透镜、四棱锥透镜和半圆球透镜封装L ED模型，并利用光学仿真软件进行研究。仿真实验结果表明：在优化条件下，高0．5 mm、直径0．9 mm的阵列圆锥透镜封装LED的光通量由平面封装的67 lm提高至84．3 lm ，即取光率提高25．8％。制作了RGB芯片的多芯片L ED样品，并用直径1 m m的阵列半圆球透镜进行封装，其取光率提高18．8％。
위료제고COB LED적취광솔，이1919 COB LED위연구대상，건립진렬식원추투경、반타구투경、사릉추투경화반원구투경봉장L ED모형，병이용광학방진연건진행연구。방진실험결과표명：재우화조건하，고0．5 mm、직경0．9 mm적진렬원추투경봉장LED적광통량유평면봉장적67 lm제고지84．3 lm ，즉취광솔제고25．8％。제작료RGB심편적다심편L ED양품，병용직경1 m m적진렬반원구투경진행봉장，기취광솔제고18．8％。
Recently ,high power multi‐chip chip on board (COB) LED has become the industrial trends ,duo to its advantages ,such as higher packaging density ,higher thermal stability ,wider irri‐tation angle and etc .However ,low light extraction efficiency of COB LED restricts its application and development .In order to improve the light extraction efficiency of LED ,the models of COB LED packaged by cone arrays ,half‐ellipsoid arrays ,rectangular pyramid arrays and hemisphere array were established and investigated by applying stimulation software .The stimulation result showed that un‐der optimal conditions ,the luminous flux of COB LED with 0 .9 mm height and 0 .5 mm diameter cone array lens increased from 67 lm to 84 .3 lm ,that is ,light extraction efficiency increased by 25 .8% .Finally ,LED samples with RGB multi‐chips were packaged by 1 mm diameter hemisphere array ,and the light extraction efficiency increased by 18 .8% .