Display systems

Details Display systems Display systems

H - Electricity

04

N

375/39, 350/75,

H04N 9/12 (2006.01) G01S 7/06 (2006.01) G02F 1/139 (2006.01) H04N 9/22 (2006.01)

Patent

CA 1056049

Abstract of the Disclosure A colour display system includes an electrically controlled colour filter and a screen for displaying monochrome images in response to inputs of different kinds. The colour transmitted by the filter is controlled so that the colour of an observed image is selected according to its kind. The filter includes between electrode structures, a layer of liquid crystal material having an electrically adjustable optical activity, the layer being arranged in optical combination with at least one polariser and at least one layer of birefringent material. The colour transmitted by the filter may be changed by stopped changes in control voltage or frequency but is stable to control voltage and frequency fluctuation, and is uniform. The system has application to colour television, and to electronic data display.

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