Decoupled holographic film and diffuser
First Claim
1. A display device comprising:
- a plurality of display elements;
a light guide configured to propagate light therein by total internal reflection, said light guide comprising a turning film, said turning film comprising a holographic layer configured to turn said light propagating within the light guide by total internal reflection toward said plurality of display elements;
a plurality of scattering features forward said turning film; and
a cladding comprising material disposed between said turning film and said scattering features such that light is guided in said turning film.
3 Assignments
0 Petitions
Accused Products
Abstract
In various embodiments described herein, a display device includes a front illumination device that comprises a light guide disposed forward of an array of display elements, such as an array of interferometric modulators, to distribute light across the array of display elements. The light guide may include a turning film to deliver uniform illumination from a light source to the array of display elements. For many portable display applications, the light guide comprises the substrate used in fabricating the display elements. The display device may include additional films as well. The light guide, for example, may include a diffuser and/or an optical isolation layer to further enhance the optical characteristics of the display.
381 Citations
33 Claims
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1. A display device comprising:
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a plurality of display elements; a light guide configured to propagate light therein by total internal reflection, said light guide comprising a turning film, said turning film comprising a holographic layer configured to turn said light propagating within the light guide by total internal reflection toward said plurality of display elements; a plurality of scattering features forward said turning film; and a cladding comprising material disposed between said turning film and said scattering features such that light is guided in said turning film. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A display device comprising:
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means for displaying an image; means for turning light comprising a holographic means, said light turning means configured to propagate light in the holographic means and to turn light toward the displaying means; means for scattering light disposed forward of said light turning means; and means for redirecting light from said light turning means back into said light turning means such that light is guided in said light turning means, said light redirecting means comprising material being between said light turning means and said light scattering means. - View Dependent Claims (28, 29, 30, 31, 32)
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33. A method of manufacturing a display device comprising:
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providing a plurality of display elements; providing a light guide configured to propagate light therein by total internal reflection, said light guide comprising a turning film, said turning film comprising a holographic layer configured to turn said light propagating within the light guide by total internal reflection toward said plurality of display elements; providing a plurality of scattering features forward said turning film; and disposing a cladding comprising material between said turning film and said scattering features such that light is guided in said turning film.
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Specification