Light Out-Coupling for Reflective Displays: Simple Geometrical Model, MATLAB Simulation, and Experimental Validation

Light out-coupling efficiency is a common issue for light emissive displays and devices, but is rarely discussed for reflective displays (e-Paper). The latest generation of reflective displays include light scattering particles and reflectance that is close to Lambertian (paper-like). However, this...

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Bibliographic Details
Published inJournal of display technology Vol. 7; no. 9; pp. 473 - 477
Main Authors Shu Yang, Hagedon, M., Heikenfeld, J.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.09.2011
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Computer simulation
Display devices
Displays
Light out-coupling
Light scattering
Mathematical model
Mathematical models
Matlab
Optical losses
Optical refraction
Optical scattering
Optical variables control
Pixel
Reflection
Reflectivity
Refractive index
scattering
total- interna l reflection
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Summary:Light out-coupling efficiency is a common issue for light emissive displays and devices, but is rarely discussed for reflective displays (e-Paper). The latest generation of reflective displays include light scattering particles and reflectance that is close to Lambertian (paper-like). However, this light scattering inside a reflective pixel can lead to total-internal reflection and additional light loss. This paper provides both a simple geometrical and a more detailed MATLAB simulation for calculating light out-coupling. Both approaches were found to agree with experimental results that reveal 5%-20% optical loss due to inefficient out-coupling. These out-coupling models improve the accuracy of predicting optical performance in reflective displays.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:1551-319X
1558-9323
DOI:10.1109/JDT.2011.2130510