US 9,324,286 B2 · Multiple primary color liquid crystal display device and signal conversion circuit

Abstract

The viewing angle characteristics of a multiprimary liquid crystal display device in which a plurality of red subpixels are provided in each pixel are improved. A multiprimary liquid crystal display device according to the present invention includes a pixel defined by a plurality of subpixels, and performs multicolor display by using four or more primary colors to be displayed by the plurality of subpixels. The plurality of subpixels of the multiprimary liquid crystal display device according to the present invention include first and second red subpixels R1 and R2 for displaying red, a green subpixel G for displaying green, a blue subpixel B for displaying blue, and a cyan subpixel C for displaying cyan. When a color having a hue which is within a predetermined first range is displayed by the pixel, the gray scale level of the first red subpixel R1 and the gray scale level of the second red subpixel R2 differ from each other. When a color having a hue which is within a second range different from the first range is displayed by the pixel, the gray scale level of the first red subpixel R1 and the gray scale level of the second red subpixel R2 are equal.

Claims21

Dependent claims

A multiprimary liquid crystal display device comprising a pixel defined by a plurality of subpixels, the multiprimary liquid crystal display device performing multicolor display by using four or more primary colors to be displayed by the plurality of subpixels, wherein,

the plurality of subpixels include first and second red subpixels for displaying red, a green subpixel for displaying green, a blue subpixel for displaying blue, and a cyan subpixel for displaying cyan, there being a greater number of red subpixels in the pixel than any other color of subpixels;
and
when a color having a hue within a predetermined first range is displayed by the pixel, a gray scale level of the first red subpixel and a gray scale level of the second red subpixel differ from each other, and
when a color having a hue within a second range which is different from the first range is displayed by the pixel, the gray scale level of the first red subpixel and the gray scale level of the second red subpixel are equal.

1 more element

A signal conversion circuit for use in a multiprimary liquid crystal display device having a pixel defined by a plurality of subpixels including first and second red subpixels for displaying red, a green subpixel for displaying green, a blue subpixel for displaying blue, and a cyan subpixel for displaying cyan, there being a greater number of red subpixels in the pixel than any other color of subpixels, the multiprimary liquid crystal display device performing multicolor display by using four or more primary colors to be displayed by the plurality of subpixels, the signal conversion circuit comprising:

a multiprimary signal generation circuit for receiving an input video signal corresponding to three primaries and generating a multiprimary signal corresponding to four or more primary colors;
and
a red subpixel independent driving circuit for, depending on a hue of a color represented by the input video signal, determining the gray scale level of the first red subpixel and the gray scale level of the second red subpixel from a red component contained in the multiprimary signal.

A signal conversion circuit for use in a multiprimary liquid crystal display device having a pixel defined by a plurality of subpixels including first and second red subpixels for displaying red, a green subpixel for displaying green, a blue subpixel for displaying blue, and a yellow subpixel for displaying yellow, there being a greater number of red subpixels in the pixel than any other color of subpixels, the multiprimary liquid crystal display device performing multicolor display by using four or more primary colors to be displayed by the plurality of subpixels, the signal conversion circuit comprising:

a multiprimary signal generation circuit for receiving an input video signal corresponding to three primaries and generating a multiprimary signal corresponding to four or more primary colors;
and
a red subpixel independent driving circuit for, depending on a hue of a color represented by the input video signal, determining the gray scale level of the first red subpixel and the gray scale level of the second red subpixel from a red component contained in the multiprimary signal.

Dependencies are inferred from the claim text.

Multiple primary color liquid crystal display device and signal conversion circuit

Life of this patent

Multiple primary color liquid crystal display device and signal conversion circuit

Life of this patent

Abstract

Claims21