Patent ID: 9164351
Filing Date: 2015-10-20
Classification: G02B,G02F

Abstract:
1. An imaging panel comprising: first, second, and third emitters configured to emit sequentially, the first emitter configured to emit in a first wavelength band, the second emitter configured to emit in a second wavelength band, the third emitter configured to emit in a third wavelength band; a first waveguide having a first grating electronically switchable between a passive transparent state and an active diffractive state, the first waveguide configured to diffract light from the first emitter when the first emitter is fired and to remain in the passive transparent state when the second or third emitter is fired; a second waveguide having a second grating electronically switchable between a passive transparent state and an active diffractive state, the second waveguide configured to diffract light from the second emitter when the second emitter is fired and to remain in the passive transparent state when the first or third emitter is fired; a third waveguide having a third grating electronically switchable between a passive transparent state and an active diffractive state, the third waveguide configured to diffract light from the third emitter when the third emitter is fired and to remain in the passive transparent state when the first or second emitter is fired; a reflective image-forming array configured to form a display image using light from the first, second, and third waveguides and to reflect the display image back through the first, second, and third waveguides; and a freeform-prism eyepiece configured to receive the display image and to present the display image for viewing, together with an external image transmitted through the freeform-prism eyepiece.