Current Density and Irradiance Distribution of Light-emitting-diode-array Device with Divided Pixels

BAO Xing-zhen; LIANG Jing-qiu; LIANG Zhong-zhu; QIN Yu-xin; LYU Jin-guang; WANG Wei-biao

doi:10.3788/fgxb20163711.1399

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Current Density and Irradiance Distribution of Light-emitting-diode-array Device with Divided Pixels

更新时间：2020-08-12

- Current Density and Irradiance Distribution of Light-emitting-diode-array Device with Divided Pixels
- Chinese Journal of Luminescence Vol. 37, Issue 11, Pages: 1399-1407(2016)
- 作者机构：
  
  1. 中国科学院大学, 北京 100049
  2. 中国科学院长春光学精密机械与物理研究所应用光学国家重点实验室, 吉林长春 130033
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20163711.1399
  CLC： O439;TN383+.1
- Received：30 May 2016，
  
  Revised：27 June 2016，
  
  Published：05 November 2016
- 稿件说明：
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包兴臻, 梁静秋, 梁中翥等. 像素分割对LED电流密度及光照度分布的影响[J]. 发光学报, 2016,37(11): 1399-1407

BAO Xing-zhen, LIANG Jing-qiu, LIANG Zhong-zhu etc. Current Density and Irradiance Distribution of Light-emitting-diode-array Device with Divided Pixels[J]. Chinese Journal of Luminescence, 2016,37(11): 1399-1407
包兴臻, 梁静秋, 梁中翥等. 像素分割对LED电流密度及光照度分布的影响[J]. 发光学报, 2016,37(11): 1399-1407 DOI： 10.3788/fgxb20163711.1399.

BAO Xing-zhen, LIANG Jing-qiu, LIANG Zhong-zhu etc. Current Density and Irradiance Distribution of Light-emitting-diode-array Device with Divided Pixels[J]. Chinese Journal of Luminescence, 2016,37(11): 1399-1407 DOI： 10.3788/fgxb20163711.1399.

摘要

将300m300m LED芯片阵列化为间隔为20m的33个80m80m的子单元，阵列化后，总饱和光输出功率是未阵列化前的5.19倍，最大注入电流提高近7倍，表明阵列可以注入更大的电流和输出更高的饱和光功率。此外，采用多颗阵列化后的LED芯片形成的芯片组照明，得知芯片组间距为最大平坦条件

max

时，接收面上照度均匀性最佳；芯片组数越多，接收面上均匀照度的面积越大。同时，9颗300m300m的芯片阵列化为9个80m80m LED芯片后，以

max

排列照明相对于9颗未阵列化的300m300m芯片以

max

排列照明时，接收面上的光照度均匀性不变，照度值提高了3倍。

Abstract

When a 300 m300 m chip is divided into 33 small chips with 20 m adjacent spacing

the total saturated output power enhances up to 5.19 times and the maximum inject current increases 7 times nearly. The consequences indicate LED chip with smaller pixels array can possess greater inject current and higher saturated output power than the primary chip. Meanwhile

the effects of chips number and LED chips distance for irradiance distribution on target plane illuminated by multi-LED chips are studied. The irradiance uniformity reaches its peaks when LED chip-to-chip distance equals to maximum flat condition

max

. In addition

the irradiance uniformity area is increasing when the number of LED chips increasing. When the target plane is illumined by nine 300 m300 m LED chips with distance

max

and each chip is divided into nine 80 m80 m smaller pixels

the irradiance value is 3 times as primary LED chips array while the uniformity of irradiance not changing.

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references

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