Display device having a diffusing display panel and a reflecting polarizer
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United States of America Patent
Stats
-
May 4, 1999
Grant Date -
N/A
app pub date -
May 24, 1995
filing date -
May 31, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Display device (1) comprising an illumination system (3) having a radiation source (17; 31, 35) for supplying a radiation beam. The display device (1) also comprises a diffusing display panel (5). This panel (5) consists of an optically active diffusing medium (7) which is switchable between a transparent, polarization-maintaining state and a diffusing, depolarizing state for the radiation beam. The medium (7) is present between a first polarizer (9) having a first state of polarization and a second polarizer (11) having a second, complementary state of polarization. At least the first polarizer (9) is a reflecting polarizer and polarization-converting means (10) are arranged at a side of the first polarizer (9) facing away from the display panel (5).
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Cited Art Landscape
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