Display device comprising fluorescent enhanced reflective holographic illumination
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United States of America Patent
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Jan 14, 1997
Grant Date -
N/A
app pub date -
Mar 7, 1994
filing date -
Mar 7, 1994
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Abstract
A display device (10) includes a display panel, such as a liquid crystal panel (12), in combination with a reflective holographic optical element (14) that redirects ambient light for illuminating the display. The light redirected by the holographic element is limited to a predetermined spectral band. Fluorescent film (16) is included for absorbing light outside the spectral band of the holographic element and re-emitting light within the spectral band to increase the light redirected by the holographic element and thus increase the apparent brightness of the display.
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