Projection displays with transparent screens are a fresh approach that offers enhanced user experiences. However, projection displays suffer from low brightness of reflected light and undesired leakage of transmitted light. This disclosure describes a switchable, dual-layer projection screen that is transparent when off. When turned on, the screen displays a bright, sharp, reflection of the projected image devoid of noisy or background images arising from light leakage.
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Anonymous, "A Dual-Layer, Switchable, Transparent Projection Screen", Technical Disclosure Commons, (October 07, 2020)