Appeal No. 2000-1201 Page 2
Application No. 08/817,825
light beams; and transmits the latter beams in different
directions. A liquid crystal display (“LCD”) screen features
a plurality of pixels. Each pixel comprises a red sub-pixel,
a blue sub-pixel, and a green sub-pixel. A chromatic
modulator, positioned between the light source and the LCD
screen, is tuned to a predetermined wavelength so as to
transmit a predetermined portion of light energy that it
receives at the predetermined wavelength to the LCD screen.
Claim 10, which is representative for present purposes,
follows:
10. An illumination system for an electrooptic
colour display screen, comprising:
a polychrome light source;
a spatio-chromatic separation system receiving a
polychrome light beam coming from said polychrome
light source and transmitting a plurality of
illuminating light beams having different wavelength
ranges and in different directions;
an electrooptic display screen having a
plurality of image elements, each one of said
plurality of image elements having a plurality of
display elements; and
at least one chromatic modulation device
provided between said polychrome light source and
said display screen, said at least one chromatic
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Last modified: November 3, 2007