Colored liquid crystal display

Details Colored liquid crystal display Colored liquid crystal display

H - Electricity

01

L

345/8

H01L 33/00 (2006.01) G02F 1/13357 (2006.01)

Patent

CA 1147044

D-3,269 C-3136 COLORED LIQUID CRYSTAL DISPLAY Abstract of the Disclosure A twisted nematic liquid crystal cell is bounded by front and rear polarizers and a partially transmissive fluorescent color filter is placed behind the rear polarizer either as a coating on the polarizer or as a coating on a separate substrate. A light source behind the filter illuminates the display and ambient light incident on the face of the display provides illumination as well. The fluorescent filter enhances the light passing through the filter in a characteristic color band to provide a very bright display affording high contrast. Contrast is heightened by adding a small amount of pleochroic dye to the liquid crystal material. By using a plurality of colors in a predetermined pattern, the filter can provide a display illuminated in a variety of bright colors.

347260

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