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首页> 外文会议>Sixth International Conference on Solid State Lighting >Testing high brightness LEDs relative to application environment
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Testing high brightness LEDs relative to application environment

机译：相对于应用环境测试高亮度LED

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摘要

Application of light emitting diodes is expanding as the luminous output and efficiencies of these devices improve. At the same time, the number of LED package types is increasing, making it challenging to determine the appropriate device for use in lighting product designs. A range of factors should be considered when selecting a LED for an application including color coordinates, luminous efficacy, cost, lumen maintenance, application life, packaging and manufacturability. Additional complexities can be introduced as LED packages become obsolete and replacement parts must be selected. The replacement LED characteristics must be understood and assessed against the parameters of the original device, in order to determine if the change will be relatively simple or will force other end-product changes. While some characteristics are readily measured and compared, other factors, such as lumen maintenance, are difficult to verify. This paper will discuss the characteristics of a LED that should be considered during the design process as well as methods to validate these characteristics, particularly those which are not typically on data sheets or, are critical to the design and warrant additional validation. Particular attention will be given to LED lumen maintenance. While published manufacturer data typically provides temperature versus performance curves, the data may not be useful depending upon the application's operating environment. Models must be created to estimate the LED's junction temperature and degradation curve at the applied temperature in order to develop a more precise life estimate. This paper presents one approach to a LED device life and performance study designed with application environments in mind.
机译：随着这些设备的发光输出和效率的提高，发光二极管的应用正在扩展。同时，LED封装类型的数量在增加，这使得确定用于照明产品设计的合适器件具有挑战性。为应用选择LED时应考虑一系列因素，包括颜色坐标，发光效率，成本，流明维持率，应用寿命，包装和可制造性。随着LED封装的过时和必须选择替换零件，可能会引入其他复杂性。必须了解替换LED的特性，并根据原始设备的参数进行评估，以便确定更改是否相对简单或将迫使其他最终产品更改。尽管容易测量和比较某些特性，但难以验证其他因素，例如流明维持率。本文将讨论在设计过程中应考虑的LED的特性以及验证这些特性的方法，尤其是那些通常不在数据手册中或对于设计至关重要并需要进行额外验证的特性。将特别注意LED流明的维护。尽管已发布的制造商数据通常会提供温度与性能的关系曲线，但根据应用程序的操作环境，该数据可能无用。为了建立更精确的寿命估算，必须创建模型以估算LED的结温和所应用温度下的退化曲线。本文提出了一种针对LED器件寿命和性能研究的方法，该方法的设计考虑了应用环境。

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