Architectures and methods for outputting different wavelength light out of waveguides
First Claim
1. A display system comprising:
- a display comprising a waveguide stack comprising a plurality waveguides, each waveguide comprising a first major surface and a second major surface, wherein the waveguide stack comprises;
a first waveguide;
a first wavelength selective filter proximate to and on the first major surface of the first waveguide;
a first outcoupling optical element comprising diffractive elements proximate to and on the first wavelength selective filter;
a second waveguide over the first outcoupling optical element;
a second wavelength selective filter proximate to and on the first major surface of the second waveguide;
a second outcoupling optical element comprising diffractive elements proximate to and on the second wavelength selective filter of the second waveguide;
a first incoupling optical element configured to incouple incident light into the first waveguide; and
a second incoupling optical element configured to incouple incident light into the second waveguide;
wherein the first wavelength selective filter has a first rearward surface adjacent the first major surface and a first forward surface opposite the first rearward surface, the first wavelength selective filter configured to;
transmit incoupled light at a first plurality of wavelengths through the first rearward surface and reflect a portion of the transmitted light at the first plurality of wavelengths away from the first forward surface; and
wherein the first outcoupling optical element is configured to outcouple the incoupled light of the first plurality of wavelengths transmitted through the first wavelength selective filter.
3 Assignments
0 Petitions
Accused Products
Abstract
Architectures are provided for selectively outputting light for forming images, the light having different wavelengths and being outputted with low levels of crosstalk. In some embodiments, light is incoupled into a waveguide and deflected to propagate in different directions, depending on wavelength. The incoupled light then outcoupled by outcoupling optical elements that outcouple light based on the direction of propagation of the light. In some other embodiments, color filters are between a waveguide and outcoupling elements. The color filters limit the wavelengths of light that interact with and are outcoupled by the outcoupling elements. In yet other embodiments, a different waveguide is provided for each range of wavelengths to be outputted. Incoupling optical elements selectively incouple light of the appropriate range of wavelengths into a corresponding waveguide, from which the light is outcoupled.
-
Citations
22 Claims
-
1. A display system comprising:
a display comprising a waveguide stack comprising a plurality waveguides, each waveguide comprising a first major surface and a second major surface, wherein the waveguide stack comprises; a first waveguide; a first wavelength selective filter proximate to and on the first major surface of the first waveguide; a first outcoupling optical element comprising diffractive elements proximate to and on the first wavelength selective filter; a second waveguide over the first outcoupling optical element; a second wavelength selective filter proximate to and on the first major surface of the second waveguide; a second outcoupling optical element comprising diffractive elements proximate to and on the second wavelength selective filter of the second waveguide; a first incoupling optical element configured to incouple incident light into the first waveguide; and a second incoupling optical element configured to incouple incident light into the second waveguide; wherein the first wavelength selective filter has a first rearward surface adjacent the first major surface and a first forward surface opposite the first rearward surface, the first wavelength selective filter configured to; transmit incoupled light at a first plurality of wavelengths through the first rearward surface and reflect a portion of the transmitted light at the first plurality of wavelengths away from the first forward surface; and wherein the first outcoupling optical element is configured to outcouple the incoupled light of the first plurality of wavelengths transmitted through the first wavelength selective filter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
Specification