Abstract
Recent years have shown an explosion in different LED–LCD displays, and a corresponding proliferation of LED TVs in the consumers’ living rooms. They offer a great picture, a great styling with a thin-form factor, increased functionality such as 3D and internet access, and great value for money. Likewise, the technical product design of LED–LCD TVs also made great strides in the past years. One of the key aspects of LED TV design is cooling of the LEDs, which also has evolved to cater for steadily increasing power densities in ever thinner product enclosures. In the lighting and computer industry, large finned heat sinks are used to address comparable thermal challenges. In the thin-form factor of a modern TV set, this is not feasible, and the only large surface areas available for cooling are located on the front and the back of the TV set. The role of in-plane heat spreading in LED–LCD thermal management has not been addressed so far. The scope of this subchapter is to clarify the thermal significance of heat spreading in the in-plane direction in the set, especially in relation to cost down initiatives using less LED packages at equal total light output.
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Notes
- 1.
According to IES RP-16-10 Nomenclature and Definitions for Illuminating Engineering, the quantity denoted by LE here is officially known as “luminous efficacy of radiant flux.” CIE S017/E:2011 ILV: International Lighting Vocabulary defines the same quantity under the name “luminous efficacy (of radiation).”
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Acknowledgments
A Thank-you to Philips TV innovation laboratory Eindhoven and Philips TV development site Bruges, whose ongoing support in TV-cooling activities is gratefully acknowledged.
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Luiten, G. (2014). Thermal Challenges in LED-Driven Display Technologies: State-of-the-Art. In: Lasance, C., Poppe, A. (eds) Thermal Management for LED Applications. Solid State Lighting Technology and Application Series, vol 2. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-5091-7_14
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DOI: https://doi.org/10.1007/978-1-4614-5091-7_14
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