52.4L: <i>Late‐News Paper</i>: Ultra‐Low‐Power Reflective Display with World's Best Color

Liu, Brad Benson Qin; Koch, Tim; Mabeck, Jeff; Hoffman, Randy; Mourey, Devin A.; Combs, Gregg; Zhou, Zhang‐Lin; Henze, Dick

doi:10.1002/j.2168-0159.2012.tb05881.x

“…Another interesting technology based on Interferometric Modulation (IMOD) is microelectromechanical sytems (MEMS) [39], whose potential has been demonstrated through several prototypes (trademarked Mirasol [40]) developed by Qualcomm. Some other remarkable developments are the in-plane electrophoretics (IPE) patented by Canon [41] and HP's Electrokinetic (EKD) [42], although they are at least several years away from a general market uptake [43].…”

Section: Electronic Paper (E-paper)mentioning

confidence: 99%

Review of Display Technologies Focusing on Power Consumption

Fernández

¹

,

Zalama

²

,

Alonso

³

2015

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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.

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“…Another interesting technology based on Interferometric Modulation (IMOD) is microelectromechanical sytems (MEMS) [39], whose potential has been demonstrated through several prototypes (trademarked Mirasol [40]) developed by Qualcomm. Some other remarkable developments are the in-plane electrophoretics (IPE) patented by Canon [41] and HP's Electrokinetic (EKD) [42], although they are at least several years away from a general market uptake [43].…”

Section: Electronic Paper (E-paper)mentioning

confidence: 99%

Nuevas tecnologías para la mejora de la eficiencia energética en el contexto del hogar digital y la smart grid

Fernández¹

1

0

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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.

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“…Reprinted by permission from Cambridge University Press: [MRS Bulletin Online Proceedings Library] ([51, 52]), copyrighted (2011). first low-power, paint-like, color reflective display utilizing their electrokinetic display technology.Figure 12illustrates color electronic paper displays using electrokinetic technology[53].…”

mentioning

confidence: 99%

Effect of nanodroplet ink concentration on image contrast for reverse-emulsion electrophoretic displays

Wang¹

0

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Reverse-emulsion electrophoretic display technology is based on an electro-responsive ink comprised of self-assembled nanodroplets dispersed in a non-polar liquid. The dye-containing nanodroplets are selectively driven toward or away from the viewing plane of a display by electric fields. The hypothesis of this study is that image contrast in a nanodroplet electrophoretic display is governed by concentration and steric effects that limit the intensity of the dark state. Simultaneously, steric effects as well as electrostatic screening can diminish whiteness in the light state. This hypothesis has been tested by multiphysics simulation of dilute species in electrostatic fields and experimental measurements of relative luminance in test displays. Concentration level was varied in a range of dilutions from full concentration (100%) to one-eighth (12.5%) and the highest contrast ratio was achieved at 25%. The test devices exhibited behavior that was similar to the saturation effects predicted by simulation, accounting for steric effects. Ink concentration showed little effect on switching time, reaching steady-state within approximately 2 seconds for all concentration levels. The hypothesis was further tested by experimentally observing the effect of driving voltage between 1 V to 8 V. The results showed no significant improvement of contrast even at higher voltage, further suggesting that concentration and steric effects dictate maximum contrast. me the opportunity to conduct research within his group but also taught me the meaning of professionalism. This thesis would not be possible without his encouragement and direction. I would also like to thank Dr. Bryning for his friendly nature, immense knowledge, and valuable discussions. He was the Ironman that provided me with the tools to make data acquisition possible. Our constant laughter was what kept my dreams and spirits high. Next, I would like to thank Dr. Maryam Mobed-Miremadi. She is one of the kindest professors. She constantly provided new ideas, guidance, and encouragement to pursue a higher education degree. To my loving friends, it has been a great journey. I enjoyed our laughter, joy, and overnight projects with less than healthy food. A very special thanks to Will Schulkins for his invaluable assistance with dynamic light scattering measurements. I offer my sincere appreciation to Remy Cromer for giving me the opportunity to work with his nanodroplet ink. Finally, I would like to dedicate this work to my parents, Danny and Viola. This thesis is tangible evidence of my appreciation for my friends and family. Thank you for never doubting my ability, for your constant support, and for your unconditional love. It has provided me strength and willpower to complete this challenge and has helped me become a better person. v

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52.4L: Late‐News Paper: Ultra‐Low‐Power Reflective Display with World's Best Color

Cited by 7 publications

References 2 publications

Review of Display Technologies Focusing on Power Consumption

Review of Display Technologies Focusing on Power Consumption

Nuevas tecnologías para la mejora de la eficiencia energética en el contexto del hogar digital y la smart grid

Effect of nanodroplet ink concentration on image contrast for reverse-emulsion electrophoretic displays

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