AUGMENTED REALITY DEVICE WITH ADJUSTABLE ELECTROACTIVE BEAM SPLITTER

Bright ambient light can wash out a virtual image in a conventional augmented reality device. Fortunately, this problem can be prevented with a variable electro-active beam splitter whose reflect/transmit ratio can be varied or switched on and off rapidly at a duty cycle based on the ambient level....

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Bibliographic Details
Main Authors MILTON HARRY, VAN HEUGTEN ANTHONY, TRAJKOVSKA-BROACH ANITA
Format Patent
LanguageChinese
English
Published 18.05.2021
Subjects
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Summary:Bright ambient light can wash out a virtual image in a conventional augmented reality device. Fortunately, this problem can be prevented with a variable electro-active beam splitter whose reflect/transmit ratio can be varied or switched on and off rapidly at a duty cycle based on the ambient level. As the ambient light gets brighter, the beam splitter's transmit/reflect ratio can be shifted so that the beam splitter reflects more light from the display and transmits less ambient light to the user's eye. The beam splitter can also be switched between a highly reflective state and a highly transmissive state at a duty cycle selected so that the eye spends more time integrating reflected display light than integrating transmitted ambient light. The splitting ratio and/or duty cycle can be adjusted as the ambient light level changes to provide the optimum experience for the user. 在常规增强现实装置中，明亮的环境光可冲淡虚拟图像。幸而可通过可变电活性分束器来防止此问题，所述可变电活性分束器的反射/透射比可基于环境水平而在一定占空比下快速变化或接通和切断。当所述环境光变得较亮时，所述分束器的透射/反射比可转变以使得所述分束器反射更多来自显示器的光并
Bibliography:Application Number: CN201980064914