US 4,090,219 A · Liquid crystal sequential color display

Abstract

A liquid crystal field sequential color display is formed by presenting three monochromatic images corresponding to the three primary colors, that is, red, green and blue, consecutively in a repetitive sequence and at a rate greater than the flicker fusion frequency for human vision. Each field contains a monochromatic image showing how the intensity of the primary color to which it corresponds varies over the entire image area. The black and white imaging techniques typically used for forming the intensity pattern for each field are transformed into the required sequential monochromatic image patterns through the use of colored filters in one embodiment or colored light in another embodiment. The novel result is obtained by the combining of flat panel liquid crystal display technology with color display technology. This invention disclosure shows a practical method for combining these techniques into a device that will form a full color image.

Claims5

Dependent claims

A liquid crystal field sequential color display system for receiving an applied video signal from a video data source and providing a color display to an observer comprising:

liquid crystal display panel means having a multiplicity of liquid crystal cells;
addressing means for selectively energizing individual liquid crystal cells with an applied video signal associated with each of a plurality of primary colors to provide a display pattern for each of said plurality of primary colors characterized by variations in the reflectivity of individual cells over the surface of said display panel;
means for displaying the display pattern associated with each of said plurality of primary colors during repetitive intervals, said means for displaying including means for providing illumination of said liquid crystal display panel by each of said primary colors;
and
means for synchronizing the display pattern associated with each of said primary colors with the illumination of said display panel by the associated primary color.

2 more elements

Dependencies are inferred from the claim text.

Liquid crystal sequential color display

Life of this patent

Liquid crystal sequential color display

Life of this patent

Abstract

Claims5