BEAM STEERING BACKLIGHT UNIT AND HOLOGRAPHIC DISPLAY APPARATUS INCLUDING THE SAME
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United States of America Patent
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Issued Date -
Jan 25, 2018
app pub date -
Dec 6, 2016
filing date -
Jul 19, 2016
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Abstract
A beam steering backlight unit provides a hologram image to multiple viewing positions and a holographic display apparatus includes the beam steering backlight unit. The backlight unit includes a light source array comprising a plurality of two-dimensionally arranged light sources and a micro lens array arranged to face the light source array and comprising a plurality of two-dimensionally arranged micro lenses. The light source array includes a plurality of light source blocks each corresponding to a respective one of the plurality of micro lenses, wherein a plurality of the light sources are arranged in each of the plurality of light source blocks. The light source array is configured to select and turn on only those light sources of the plurality of light sources respectively disposed in a same position in each of the plurality of light source blocks and turn off the other light sources.
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