Temperature behavior and compensation of light-emitting diode

被引：20

作者：

Bera, SC ^{[1
]}

Singh, RV ^{[1
]}

Garg, VK ^{[1
]}

机构：

[1] Indian Space Res Org, Ctr Space Applicat, Ahmedabad 380015, Gujarat, India

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2005年 / 17卷 / 11期

关键词：

equiintensity curve; light-emitting diode (LED); light intensity; load line; temperature compensation;

D O I：

10.1109/LPT.2005.858154

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This letter offers a fresh insight into the behavior of light-emitting diode (LED) over temperature. Theoretically and by measurement, it has been shown that equiintensity curves in the diodes current-voltage plane are nearly a straight line over a very wide range of temperatures. Based on this property, bias voltage and resistance value of a bias circuit have been realized and practical measurement shows the peak-to-peak light intensity variation decreases from 99% (in case of fixed current bias) to 6% over the temperature range of -20 degrees C to +80 degrees C for the LED 1N6092. This circuit uses no separate temperature sensor or compensating mechanism, but responds directly to the junction temperature of the diodes. This prevents any error caused by temperature gradient, or by self-heating due to power dissipation in the diode.

引用

页码：2286 / 2288

页数：3