High contrast display device
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United States of America Patent
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-
Sep 8, 1987
Grant Date -
N/A
app pub date -
Jul 8, 1985
filing date -
Jul 13, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Light-emitting cells of a display device are individually provided with inner walls at least partially covered by white reflectors consisting of glass material containing transparent particles having different refractive index by 5 to 80% by weight, so that extremely high luminous efficiency similar as that of optical integrating sphere can be realized. Also, openings for emitting colored light can be applied with color filters while the front surface other than those openings of the display device is covered with light-absorbing black material, so that the reflectance for incident ambient light can be extremely reduced. According to the multiplexed effect of the above structure, remarkably high display contrast can be readily realized.
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