66.4: High Contrast Edgelit Frontlight Solution for Reflective Displays

Bita, Ion; Mienko, Marek; Narayanan, K.K.; Wang, Lai; Li, Kebin; Li, Zhengwu; Rao, Rashmi; Patel, Sapna; Chan, Clayton; Gruhlke, Russel; Ganti, Surya; Gusev, Evgeni

doi:10.1002/j.2168-0159.2012.tb05934.x

Cited by 9 publications

(11 citation statements)

References 4 publications

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“…The ILU consists of a light guide sheet laminated to the EPD front surface. Light from edge‐mounted light‐emitting diodes (LED) is coupled into the front light sheet, carried parallel to its surface by total internal reflection, then directed towards the e‐paper by small light‐turning features (scattering, reflecting, or refracting) spatially distributed to ensure uniform illumination ,…”

Section: Objective and Backgroundmentioning

confidence: 99%

Predicting the viewing direction performance of e-paper displays with front light under ambient lighting conditions

Hertel¹,

Penczek

2015

Jnl Soc Info Display

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The inherent advantages of reflective e‐paper displays (EPD) – wide viewing direction range and excellent readability even under bright sunlight – can be extended into low‐light conditions by the addition of an integrated lighting unit (ILU) such as a front light. A methodology for predicting the viewing direction dependence of ambient contrast and color from display measurements and illumination models is here applied to reflective EPD where the ILU is switched on. The predictions can be used to optimize task lighting. The ILU improves the indoor performance of EPD without compromising their superior daylight performance.

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Section: Objective and Backgroundmentioning

confidence: 99%

Predicting the viewing direction performance of e-paper displays with front light under ambient lighting conditions

Hertel¹,

Penczek

2015

Jnl Soc Info Display

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“…The basic ITSF frontlight architecture is derived from the highcontrast FL architecture QMT previously introduced [4]. It is based on efficient light extraction microstructures coated with a directionally reflective stack comprising a highly reflective metallization on the side facing the display and a low reflection coating on the viewer side.…”

Section: Touch -Frontlight Integrationmentioning

confidence: 99%

51.1: Integrated Touch Sensing and Frontlighting Device and Display Applications

Bita

Elloway

Rao

et al. 2013

Symp Digest of Tech Papers

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A novel device architecture is introduced which enables projected capacitive touch sensing and front illumination in a single substrate configuration.The basic technology for integrating the optical and electrical functions, large area glass fabrication, assembly with mirasol displays, and performance aspects are discussed. This development enables high performance hybrid emissive-reflective display applications.

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“…E Ink e-Paper displays are attracting interest for online retailers like Amazon, B&N and Kobo to replace books, newspapers, and other printed media. Since reflective displays require an external light source for illumination, attempts have been made to develop embedded and flat front light units (FLU) for a convenient and comfortable reading experience in dim light [1][2][3]. However, the distribution of light is not uniform, resulting the spot light and an uncomfortable reading experience.…”

Section: Introductionmentioning

confidence: 99%