Methods for estimating junction temperature of AC LEDs

Jayawardena, Asiri; Liu, Yiwei; Narendran, Nadarajah

doi:10.1117/12.904056

Cited by 7 publications

(2 citation statements)

References 4 publications

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“…Dissipating the heat developed in the junction is a source of concern and the development of high power densities cannot be avoided in the devices due to their smaller size. The lifetime and performance of LEDs decline exponentially with an increase in junction temperature . Heating also increases with higher electrical current, which compromises the lifetime of the LED.…”

Section: Challenges Facedmentioning

confidence: 99%

A perspective perception on the applications of light‐emitting diodes

Nair

2015

Luminescence

103

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Light-emitting diodes (LEDs) continue to penetrate the global market; their pervasiveness clearly being felt in such diverse fields as technological, socio-economic and commercial interests. The multi-billion dollar LED market is shared by various segments, including office and household lighting, street lighting, the automobile industry, traffic signals, backlighting for hand-held devices, indoor and outdoor signs and indicators, medicine, communication systems, crop cultivation using artificial light and many more. The technological development of LEDs has undergone many phases in different parts of the world. From the early discovery of luminescence to the invention of highly efficient organic LEDs, researchers have worked with the prime purpose of improving the performance of luminaires. The need to infuse the market with more efficient and cheaper products has been prevalent from the start. LEDs are a result of this uncontrolled desire of researchers to develop superior products that would displace existing products in the market. To understand what led to the current prominence of LEDs, we give a brief historical overview of the field followed by a thorough discussion of the positive features of LEDs. This work includes the basic requirements, advantages and disadvantages of LEDs in a variety of applications. A brief description of the diverse applications of LED in fields such as lighting, indicators and displays, farming, medicine and communication is given. Considerable importance is placed on discussing the possible difficulties that must be overcome before using LEDs in commercial applications.

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Section: Challenges Facedmentioning

confidence: 99%

A perspective perception on the applications of light‐emitting diodes

Nair

2015

Luminescence

103

View full text Add to dashboard Cite

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“…Other research on AC LEDs include flickering luminescence overcoming through phosphor with appropriately persistent luminescence, controlling junctions' temperature and testing photoelectric and thermal performances etc. (Jang and Shin 2011;Shin and Jang 2012;Jayawardena et al 2011;Hwu et al 2011;Jayawardena et al 2013).…”

Section: Introductionmentioning

confidence: 98%

Method to design alternating current light-emitting diodes luminous flux

et al. 2015

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Fluctuation of current through alternating current operated light-emitting diodes (AC LEDs) make luminous flux simply equivalent to the product of power consumption and luminous efficiency unreasonable, unlike constant current scenario. Based on application model and average luminous efficiency introduced by this paper, relationship between AC LEDs luminous flux and its application circuit parameters, including balance resistor, threshold voltage and equivalent resistor of LED etc. was presented. Then method to design AC LEDs through single LED photoelectric characters to meet luminous flux requirement was given.

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Luminescence properties of alternating current light-emitting diodes (AC LEDs) through operating circuit and electrical characteristics

Gao

Zhang

et al. 2016

Optik

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Methods for estimating junction temperature of AC LEDs

Cited by 7 publications

References 4 publications

A perspective perception on the applications of light‐emitting diodes

A perspective perception on the applications of light‐emitting diodes

Method to design alternating current light-emitting diodes luminous flux

Luminescence properties of alternating current light-emitting diodes (AC LEDs) through operating circuit and electrical characteristics

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