OPTICAL FILMS FOR CONTROLLING ANGULAR CHARACTERISTICS OF DISPLAYS
First Claim
1. A display device comprising:
- a light-modulating array comprising a plurality of light-modulating elements including first and second optical surfaces, the second optical surface movable with respect to the first optical surface; and
a diffuser element disposed forward of the array, the diffuser element being configured to collimate light incident on the diffuser element and direct the collimated light to the light-modulating elements.
3 Assignments
0 Petitions
Accused Products
Abstract
In various embodiments of the invention, an interferometric display device is provided having an external film with a plurality of structures that reduce the field-of-view of the display. These structures may comprise, for example, baffles or non-imaging optical elements such as compound parabolic collectors. The baffles may comprise a plurality of vertically aligned surfaces arranged, e.g., in a grid. In certain preferred embodiments these baffles are opaque or reflective. These vertical surfaces, therefore, can substantially block light from exiting the interferometric display device in a substantially non-perpendicular direction. These vertical surfaces may, however, permit light directed in a substantially vertical direction to exit the display. The non-imaging optical elements, e.g., compound parabolic collectors, redirect light from large incident angles into more normal angles towards the display. As a result, the light reflected by the display to the user is also at a more normal angle.
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Citations
26 Claims
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1. A display device comprising:
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a light-modulating array comprising a plurality of light-modulating elements including first and second optical surfaces, the second optical surface movable with respect to the first optical surface; and a diffuser element disposed forward of the array, the diffuser element being configured to collimate light incident on the diffuser element and direct the collimated light to the light-modulating elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A display device comprising:
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a means for modulating light comprising a plurality of light-modulating elements including first and second optical surfaces, the second optical surface movable with respect to the first optical surface; and a means for diffusing light comprising a diffuser element configured to receive, collimate, and direct light to the light modulating elements. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A display device comprising:
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a light-modulating array comprising a plurality of light-modulating elements including first and second optical surfaces, the second optical surface movable with respect to the first optical surface; and a diffuser element forward of the light-modulating array configured to receive light incident and direct the light incident into the light-modulating elements. - View Dependent Claims (22, 23, 24, 25, 26)
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Specification