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United States of America Patent
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Issued Date -
Mar 17, 2011
app pub date -
Sep 15, 2009
filing date -
Sep 15, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Disclosed is a display element that includes a display screen and a transparent cover overlying the display screen. The output from the display screen is magnified to occupy at least some of the transparent cover. The display element includes an arrangement of diffractive and refractive elements disposed between the display screen and the transparent cover that provide significant magnification without adding significant thickness to the display element. In some embodiments, the diffractive and refractive elements are embodied in a number of optical microelements, in some cases at least one optical microelement per pixel of the display screen. Some embodiments include microlenses that collimate the light emitted by the display screen. The display element can be “anamorphotic,” that is, the magnification in one direction differs from that in another. Some embodiments provide at least two levels of magnification. Liquid matching switches can be used to control the level of magnification.
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