Transparent Slanted Phase Gratings in Emissive Waveguides


  • The authors express their gratitude to the Dutch Polymer Institute for financial support.


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A new front-illumination principle is demonstrated for use in energy efficient and bright reflective liquid crystal displays (LCDs). The new emissive waveguide principle presented is based on Bragg diffraction of waveguided light at a tuned holographic grating. The frontlight exhibits negligible image deterioration due to an excellent transparency and a high preference for (linearly polarized) light emission towards the display.