Liquid crystal display
AssigneeSharp Kabushiki Kaisha
InventorFumikazu Shimoshikiryo
Life of this patent
Estimating the term…
Abstract
To reduce viewing angle dependence of γ characteristics in a normally black liquid crystal display. Each pixel 10 has a first sub-pixel 10a and a second sub-pixel 10b which can apply mutually different voltages to their respective liquid crystal layers. Relationships ΔV12 (gk)>0 volts and ΔV12 (gk)≧ΔV12 (gk+1) are satisfied at least in a range 0 <gk≦n−1 if it is assumed that ΔV12=V1−V2, where ΔV12 is the difference between root-mean-square voltage V1 applied to the liquid crystal layer of the first sub-pixel 10a and root-mean-square voltage V2 applied to the liquid crystal layer of the second sub-pixel 10b.
Claims32
A liquid crystal display used in normally black mode, comprising a plurality of pixels each of which has a liquid crystal layer and a plurality of electrodes for applying voltage to the liquid crystal layer, wherein:
- each of the plurality of pixels comprises a first sub-pixel and a second sub-pixel which can apply mutually different voltages to their respective liquid crystal layers;
- and
- when each of the plurality of pixels displays a grayscale gk which satisfies 0≦gk≦gn, where gk and gn are integers not less than zero and a larger value of gk corresponds to higher brightness, relationships ΔV12 (gk)>0 volts and ΔV12 (gk)≧ΔV12 (gk+1) are satisfied at least in a range 0<gk≦n−1 if it is assumed that ΔV12 (gk)=V1 (gk)−V2 (gk), where V1 (gk) and V2 (gk) are root-mean-square voltages applied to the liquid crystal layers of the first sub-pixel and the second sub-pixel, respectively.
A liquid crystal display, comprising a plurality of pixels each of which has a liquid crystal layer and a plurality of electrodes for applying an electric field to the liquid crystal layer, wherein:
- the plurality of pixels are arranged in a matrix (rp, cq) with a plurality of rows (1 to rp) and plurality of columns (1 to cq) and each pixel is expressed as P (p, q), where 1≦p≦rp and 1≦q≦cq;
- each of the plurality of pixels has at least two sub-pixels SPa (p, q), SPb (p, q), etc. arranged in the column direction;
- and
- the at least two sub-pixels differ from each other in brightness when displaying an intermediate grayscale, and the position of the brightest of the at least two sub-pixels arranged in the column direction changes periodically in the row direction in the case of a pixel in an arbitrary row, but it is constant in the case of a pixel in an arbitrary column.
Dependencies are inferred from the claim text.