Integrated modulator illumination
View Patent ↗A spatial light modulator includes an array of elements to modulate light in accordance with image data. The modulator has a display panel having first and second surfaces arranged adjacent to the array of elements such that the second surface is directly adjacent the array of elements to allow a viewer to view an image produced by modulation of light The modulator may also include a light source to provide light to the display panel and illumination dots on the first surface of the display panel to reflect light from the source to the array of elements.
1. A spatial light modulator comprising:
a light-modulating array comprising a plurality of light-modulating elements each comprising an optical cavity defined by first and second reflective surfaces that produce optical interference, said optical cavity configured to enable modulation of said optical interference, said plurality of light-modulating elements having a front side for viewing light modulated by said light-modulating array; and
at least one reflecting element, said at least one reflecting element comprising a first layer configured to reflect light propagating from a rear side of the plurality of light-modulating elements into at least one of said optical cavities for modulation,
said at least one reflecting element further comprising a second layer configured to absorb light.
2. The spatial light modulator of claim 1 , wherein said at least one reflecting element is disposed on the front side of said plurality of light-modulating elements.
3. The spatial light modulator of claim 1 , wherein said at least one reflecting elements and said plurality of light-modulating elements are disposed on opposite sides of a substrate.
4. The spatial light modulator of claim 1 , wherein said second reflective surface is movable with respect to the first reflective surface.
5. The spatial light modulator of claim 1 , wherein the light modulating array comprises a plurality of gaps between the light modulating elements and wherein said at least one reflecting element is disposed over the gaps.
6. The spatial light modulator of claim 1 , wherein the reflecting elements are uniformly spaced.
7. A method of manufacturing a spatial light modulator, the method comprising:
providing a plurality of light-modulating elements so as to form a light-modulating array, each light modulating element comprising an optical cavity defined by first and second reflective surfaces, said second reflective surface movable with respect to the first reflective surface, said plurality of light-modulating elements having a front side for viewing light modulated by said light-modulating array, and
printing or embossing at least one reflecting element so as to reflect light propagating from a rear side of the plurality of light-modulating elements into said optical cavity for modulation.
8. The method of claim 7 , further comprising printing or embossing said at least one reflecting element on a substrate.
9. The method of claim 7 , further comprising printing or embossing said at least one reflecting element on a layer of material on a substrate.
10. The method of claim 7 , wherein said at least one reflecting element is printed or embossed on the front side of said plurality of light-modulating elements.
11. The method of claim 7 , wherein said at least one reflecting element and said plurality of light-modulating elements are disposed on opposite sides of a substrate.
12. A spatial light modulator fabricated by the method of claim 7 .
13. The method of claim 7 , wherein the at least one reflecting element is printed.
14. The method of claim 13 , wherein said at least one reflecting element is printed using lithographic printing.
15. The method of claim 13 , wherein said at least one reflecting element is printed using inkjet printing.
16. The method of claim 13 , wherein said at least one reflecting element is printed using screen printing.
17. The method of claim 7 , wherein the at least one reflecting element is embossed.
18. A spatial light modulator comprising:
means for modulating light, the light modulating means having a front side for allowing a viewer to view the modulated light, the light modulating means comprising means for creating an optical resonance, the resonance creating means comprising a first means for reflecting light and a second means for reflecting light that produce optical interference, the resonance creating means configured to enable modulation of the optical interference; and
means for scattering light, said scattering means comprising a third means for reflecting configured to reflect light propagating from a rear side of the light modulating means into the resonance creating means,
said scattering means further comprising a means for absorbing configured to absorb light.
19. The spatial light modulator of claim 18 , wherein the light modulating means comprises a light modulating array including a plurality of light modulating elements.
20. The spatial light modulator of claim 18 , wherein the resonance creating means comprises an optical cavity.
21. The spatial light modulator of claim 18 , wherein the first light reflecting means comprises a first reflective surface.
22. The spatial light modulator of claim 18 , wherein the second light reflecting means comprises a second reflective surface.
23. The spatial light modulator of claim 18 , wherein the scattering means comprises reflecting elements, said third reflecting means comprises a reflecting layer and said absorbing means comprises an absorbing layer.
24. A spatial light modulator comprising:
a light-modulating array comprising a plurality of light-modulating elements each comprising an optical cavity defined by first and second reflective surfaces that produce optical interference, said optical cavity configured to enable modulation of said optical interference;
a transparent substrate having a first side and a second side, wherein light modulated by the plurality of light modulating elements is viewable by a viewer through said first side; and
a plurality of illumination dots disposed on the first side of the substrate and configured to reflect light propagating from a rear side of the plurality of light-modulating elements into at least one of said optical cavities for modulation.
25. The spatial light modulator of claim 24 , wherein the plurality of illumination dots is printed using a printing procedure selected from a group consisting of lithographic printing, inkjet printing and screen printing.
26. The spatial light modulator of claim 24 , wherein the plurality of illumination dots is embossed.
27. The spatial light modulator of claim 24 , wherein the illumination dots have a size below the resolution of a human eye.
28. The spatial light modulator of claim 24 , further comprising a light source disposed rearward of the light-modulating array.
29. A spatial light modulator comprising:
a light-modulating array comprising a plurality of light-modulating elements each comprising an optical cavity defined by first and second reflective surfaces that produce optical interference, said optical cavity configured to enable modulation of said optical interference;
a transparent substrate having a first side and a second side, wherein light modulated by the plurality of light modulating elements is viewable by a viewer through said first side; and
at least one reflecting element disposed on the first side of the substrate and configured to reflect light propagating from a rear side of the plurality of light-modulating elements into at least one of said optical cavities for modulation,
wherein said at least one reflecting element has a size below the resolution of a human eye.