Abstract
This paper provides an overview of the main manufacturing technologies of displays, focusing on those with low and ultra-low levels of power consumption, which make them suitable for current societal needs. Considering the typified value obtained from the manufacturer’s specifications, four technologies—Liquid Crystal Displays, electronic paper, Organic Light-Emitting Display and Electroluminescent Displays—were selected in a first iteration. For each of them, several features, including size and brightness, were assessed in order to ascertain possible proportional relationships with the rate of consumption. To normalize the comparison between different display types, relative units such as the surface power density and the display frontal intensity efficiency were proposed. Organic light-emitting display had the best results in terms of power density for small display sizes. For larger sizes, it performs less satisfactorily than Liquid Crystal Displays in terms of energy efficiency.
Highlights
The world as a whole is currently in an overshoot condition
The results revealed that some displays show a remarkable increase in power consumption with size
The radar charts allow comparing the relative weight, brightness, viewing angle and contrast ratio values between the different display technology groups. For those categories in which more than one element has been studied, the mentioned features presented uniform outcomes; the average value was taken as a reference to make comparisons with other technologies
Summary
The world as a whole is currently in an overshoot condition. Population size and economic growth contribute significantly to this situation [1]. The steady growth in the use of personal portable devices during the past decade—driven by the development of mobile telecommunications and the incorporation of personal digital assistant devices and electronic books into the market—has considerably increased the per person carbon footprint [2]. The International Energy Agency (IEA), which monitors the demand and supply of energy worldwide, aims to reduce the global consumption level to an acceptable limit. In the Energy Technology Perspectives Study, the IEA points out that technologies can and must play an integral role in transforming the energy system to reduce greenhouse gases [3]
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