28 May 2004 Polarized back- and frontlights for LCDs
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Abstract
New designs are presented of backlight systems for transmissive and transflective LCD’s based on stretched PET films with a well-defined micro-structure, which emit highly collimated or diffuse and linearly polarized light with a high efficiency. Moreover, edge-lit waveguide systems are discussed equipped slanted phase gratings which combine a range of desirable features such as a high transparency in direct view, a direct emission of light at normal angles to the plane of the waveguide and a purely unidirectional out-coupling of light towards the LCD-side. Moreover, these illumination systems emit colored, linearly polarized light which should contribute significantly to the energy efficiency of transmissive, transflective and reflective LCD displays.
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Chris M. Van Heesch, H. Jagt, Hugo J. Cornelissen, Dirk J. Broer, Cees W. M. Bastiaansen, "Polarized back- and frontlights for LCDs", Proc. SPIE 5289, Liquid Crystal Materials, Devices, and Applications X and Projection Displays X, (28 May 2004); doi: 10.1117/12.549463; https://doi.org/10.1117/12.549463
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KEYWORDS
Waveguides

LCDs

Holography

Scattering

Light scattering

Diffraction gratings

Polarization

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