Back to results
US 7,443,467 B2Granted
Liquid crystal display device provided with pigmented layers in a pixel
AssigneeToshiba Matsushita Display Technology Co., Ltd.
InventorsHideyuki Takahashi, Sakae Yoshida
Life of this patent
Estimating the term…
Abstract
For the purpose of preventing line defects from occurring on a display screen in consequence of uneven coating of pigmented layers, a first pigmented layer is formed in a pattern obtained by thinning out a portion in an otherwise complete grid every other pixel in a direction of signal lines and also every other pixel in a direction of scanning lines.
Claims3
A liquid crystal display device comprising:
- a plurality of signal lines and a plurality of scanning lines respectively wired in order that each of the signal lines and each of the scanning lines can intersect each other;
- a first pigmented layer, a second pigmented layer and a third pigmented layer, portions of all which are arranged in each of division divided by the signal lines and the scanning lines;
- and
- a pixel formed by combining the portions of the first pigmented layer, the second pigmented layer and the third pigmented layer,
- wherein the first pigmented layer is formed in a grid-like pattern enclosing portions of the second pigment layer and the third pigment layer, the grid-like pattern is obtained by thinning out a portion from an otherwise complete grid in accordance with a specific cycle relating to the second pigmented layer and third pigmented layer in a direction along the scanning lines, and
- wherein, when, among pixels expressed as (nx, ny) by assuming that the pixels are counted as “ny=0, 1, 2, . . . , n” sequentially from a pixel connected to the endmost scanning line and that the pixels are counted as “nx=0, 1, 2, . . . , n” sequentially from a pixel connected to the endmost signal line, the pixels (nx, ny) provided with and without the first pigmented layer 1 extending in the scanning line direction are set as “1” and “0” respectively, presence of the first pigmented layer 1 in a portion corresponding to the second and third pigmented layers 2 and 3 in each pixel is expressed by the following formula:
- f(nx+ax, ny+ay)=a[(((((nx−bx+3)−(nx−bx+3)%3)/3)%2)*2+ny]%4],
- where:
- a[0]=1, a[1]=1, a[2]=0, and a[3]=0;
- (ax, ay) is any integer which determines an offset;
- “bx” is a minimum number of lines pigmented by the first pigmented layer 1 among the lines following the signal lines;
- and “%” means an operation, whereby a residue in integer is found.
9 more elements
A liquid crystal display device comprising:
- a plurality of signal lines and a plurality of scanning lines respectively wired in order that each of the signal lines and each of the scanning lines can intersect each other;
- a first pigmented layer, a second pigmented layer and a third pigmented layer, portions of all which are arranged in each of division divided by the signal lines and the scanning lines;
- and
- a pixel formed by combining the portions of the first pigmented layer, the second pigmented layer and the third pigmented layer,
- wherein the first pigmented layer is formed in a grid-like pattern enclosing portions of the second pigment layer and the third pigment layer, the grid-like pattern is obtained by thinning out a portion from an otherwise complete grid in accordance with a specific cycle relating to the second pigmented layer and third pigmented layer in a direction along the scanning lines, and
- wherein, when, among pixels expressed as (nx, ny) by assuming that the pixels are counted as “ny=0, 1, 2, . . . , n” sequentially from a pixel connected to the endmost scanning line and that the pixels are counted as “nx=0, 1, 2, . . . , n” sequentially from a pixel connected to the endmost signal line, the pixels (nx, ny) provided with and without the first pigmented layer 1 extending in the scanning line direction are set as “1” and as “0” respectively, presence of the first pigmented layer 1 in a portion corresponding to the second and third pigmented layers 2 and 3 in each pixel is expressed by the following formula,
- f(nx+ax, ny+ay)=c[(((nx−bx+3)−(nx−bx+3)%3)/3)%2, ny%3],
- where:
- c[0, 0]=1, c[0, 1]=0, c[0, 2]=0, c[1, 0]=0, c[1, 1]=1, and c[1,2]=1;
- (ax, ay) is any integer which determines an offset;
- “bx” is a minimum number of lines pigmented by the first pigmented layer 1 among the lines following the signal lines;
- and “%” means an operation whereby a residue in integer is found.
9 more elements
A liquid crystal display device composing:
- a plurality of signal lines and a plurality of scanning lines respectively wired in order that each of the signal lines and each of the scanning lines can intersect each other;
- a first pigmented layer, a second pigmented layer and a third pigmented layer, portions of all which are arranged in each of division divided by the signal lines and the scanning lines;
- and
- a pixel formed by combining the portions of the first pigmented layer, the second pigmented layer and the third pigmented layer,
- wherein the first pigmented layer is formed in a grid-like pattern enclosing portions of the second pigment layer and the third pigment layer, the grid-like pattern is obtained by thinning out a portion from an otherwise complete grid in accordance with a specific cycle relating to the second pigmented layer and third pigmented layer in a direction along the scanning lines, and
- wherein, when, among pixels expressed as (nx, ny) by assuming that the pixels are counted as “ny=0, 1, 2, . . . , n” sequentially from a pixel connected to the endmost scanning line and that the pixels are counted as “nx=0, 1, 2, . . . , n” sequentially from a pixel connected to the endmost signal line, the pixels (nx, ny) provided with and without the first pigmented layer 1 extending in the scanning line direction are set as “1” and as “0” respectively, presence of the first pigmented layer 1 in a portion corresponding to the second and third pigmented layers 2 and 3 in each pixel is expressed by the following formula,
- f(nx+ax, ny+ay)=a[(b[(((nx−bx+3)−(nx−bx+3)%3)/3)%6]+ny)%3],
- where:
- a[0]=1, a[1]=1, a[2]=0, b[0]=0, b[1]=1, b[2]=2, b[3]=3, b[4]=2, and b[5]=1;
- (ax, ay) is any integer which determines an offset;
- “bx” is a minimum number of lines pigmented by the first pigmented layer 1 among the lines following the signal lines;
- and “%” means an operation whereby a residue in integer is found.
9 more elements
Dependencies are inferred from the claim text.