High contrast display device

Details High contrast display device High contrast display device

1985-07-08

1987-09-08

DeMeo, Palmer C.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313113, 313587, H01J 6135

Patent

active

046926623

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.

REFERENCES:
patent: 3619698 (1971-11-01), Caras
patent: 4065698 (1977-12-01), Owaki et al.
patent: 4224553 (1980-09-01), Hellwig

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