An optical teardown, or reverse engineering, of an Amazon Kindle Paperwhite electrophoretic display was performed by Optical Coherence Tomography at 1060 nm. The display incorporates an optical diffuser, lightguide and scattering layers for white light illumination, capacitive touch sensing, and an electrophoretic display. All these layers can be imaged by OCT as well as the thin film transistor array on the back side for driving the pixels. Phase sensitive OCT is used to measure motion of the pigment particles as the display changes between black and white.
@article{arxiv.1605.05174,
title = {Optical teardown of a Kindle Paperwhite display by OCT},
author = {Bart Johnson and Walid Atia and Mark Kuznetsov and Noble Larson and Eric McKenzie and Vaibhav Mathur and Brian Goldberg and Peter Whitney},
journal= {arXiv preprint arXiv:1605.05174},
year = {2016}
}