Yuqiang Ding

Guohua Wei

Yun Wang

Shin-Tson Wu

Zhenyi Luo

Fenglin Peng

Systems and methods to improve efficiency of in-coupling into, propagating through, and out-coupling from, electromagnetic waves (e.g., in a visible light wavelength range), a waveguide system arrangement. The waveguide system arrangement includes an illumination assembly; an in-coupler, a waveguide substrate, and a parallelepiped prisms array structure, which efficiently couple electromagnetic waves (e.g., in a visible light wavelength range), horizontally propagating through the waveguide substrate, and the parallelepiped prisms array structure out-couples the electromagnetic waves (e.g., in a visible light wavelength range), from the waveguide substrate. In one implementation, the waveguide system arrangement includes an augmented reality display system and the out-coupled light provides a virtual image that is overlaid on an image of a real object with both images seen by a viewer's eye. An ultracompact liquid-crystal on silicon (LCoS) display system is also disclosed. The LCoS display system exhibits excellent light uniformity, optical efficiency, and contrast ratio.

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Yuqiang Ding