Solid-state optical modulator
A spatial light modulator comprises a solid-state chiral material disposed between electrodes such that the polarization direction of the polarized light incident thereto can be controlled through an electrical field established between the electrodes.
1. A method of displaying an image, comprising:
providing a spatial light modulator that comprises an array of individually addressable pixels, wherein each pixel comprises:
a solid-state chiral material that is disposed between first and second electrodes such that an electrical field can be established across the solid-state chiral material;
directing a beam of polarized light to the pixels of the spatial light modulator;
modulating the pixels of the spatial light modulator based on the image to be displayed by adjusting the electrical fields applied to the solid-state chiral materials of the pixels;
passing the light from the pixels of the spatial light modulator through a polarizer; and
directing the light after the polarizer onto a display target.
2. The method of claim 1 , wherein the polarized light is incident to the solid-state chiral materials such that the incident polarized light is substantially not-parallel to a primary axis of the solid-state chiral material of the pixels.
3. The method of claim 1 , wherein the step of directing the beam of polarized light to the pixels of the spatial light modulator further comprises:
directing the beam of polarized light to the pixels of the spatial light modulator through another polarizer, wherein said another polarizer has a polarization direction is substantially perpendicular to a polarization direction of said polarizer that is disposed after the spatial light modulator.
4. A display system, comprising:
a light source providing a light;
a spatial light modulator comprising an array of pixels, each pixel comprising:
a solid-state chiral material that is disposed between first and second electrodes such that an electrical field can be established across the solid-state chiral material;
a first polarizer having a first polarization direction; and a second polarizer having a second polarization direction that is substantially perpendicular to the first polarization direction; and
a set of optical elements for directing the light toward the spatial light modulator and for directing the light from the spatial light modulator onto a display target.
5. The system of claim 4 , further comprising:
a half-wave plate disposed between the light source and the spatial light modulator.
6. The system of claim 4 , wherein the first polarizer is disposed between the half-wave plate and the spatial light modulator; and the second polarizer is disposed between the spatial light modulator and the display target.
7. The system of claim 4 , wherein the first electrode is transmissive to the visible light; and wherein the second electrode is reflective to the visible light.
8. The system of claim 7 , wherein the first electrode comprises an indium-titanate-oxide layer; and wherein the solid-state chiral material comprises an inorganic material or an organic material.