Display device having wavelength-dependent birefringence compens

Details Display device having wavelength-dependent birefringence compens Display device having wavelength-dependent birefringence compens

1991-04-18

1992-10-20

Howell, Janice A.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

G02F 11335

Patent

active

051575299

ABSTRACT:
By a suitable choice of a retardation foil with a specific value of .DELTA.n (.lambda.) it is possible to make the transmission/voltage characteristic curves for, for example, red, green and blue light extend parallel in an ECB display. The same type of display can then be used for modulating three colors, with modulation voltages shifted for each color.

REFERENCES:
patent: 4080046 (1978-03-01), Nishizaki
patent: 4239349 (1980-12-01), Scheffer
patent: 4385806 (1983-05-01), Fergason
patent: 4957349 (1990-09-01), Clerc et al.
patent: 4973137 (1990-11-01), Kozaki

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