Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
1998-12-21
2001-07-10
Sikes, William L. (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S106000, C349S108000
Reexamination Certificate
active
06259504
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a liquid crystal display (LCD), and more particularly to a pixel arrangement structure being capable of graphic display with an oblique line.
Typically, the LCD includes a color filter substrate expressing colors according to the subtractive mixture of RGB, a thin film transistor (TFT) substrate for controlling pixels and a liquid crystals (LCs) injected between the TFT substrate and the color filter substrate. There are typically a triangle arrangement, a stripe arrangement and a mosaic arrangement as a pixel arrangement method. The stripe type pixel arrangement method as shown in
FIG.1
is mainly used for OA. Referring to
FIG.1
, the prior LCD having a stripe type pixel arrangement, includes a plurality of gate lines G
11
, G
12
, G
13
. . . and a plurality of data lines D
11
, D
12
, D
13
, . . . The gate lines are elongated in the first direction which is a row direction and are spaced in a predetermined distance to isolate each other. The data lines are elongated in the second direction which is a column direction and are spaced in a predetermined distance to isolate each other.
The gate lines and the data lines are crosses each other to define pixel regions PS
11
-PS
13
. R, G, and B dots are respectively disposed in the pixel regions PS
11
-PS
13
, thereby constituting one pixel. In each of the pixel regions PS
11
-PS
13
, thin film transistors (TFTS) each of which its gate is connected to the corresponding gate line and its source or drain is connected to the corresponding data line, are respectively disposed at an intersections of the gate lines and the date lines. Accordingly, R, G and B dots RD, GD and BD are respectively disposed in the pixel regions PS
11
-PS
13
and the TFTs T
11
-T
13
for driving the R, G and B dots RD, GD and BD are respectively disposed in the pixel region. In pixel arrangement of
FIG. 1
, a red dot R, a green dot G and a blue dot B constituting one pixel are vertically arranged with a vertical stripe type. That is, each of R, G and B dots RD, GD and BD is straight arranged in the column direction which is a first direction along the data line. Which is a first direction. The LCD with a stripe type pixel arrangement is suitable for OA, not for A/V as compared with a triangle type pixel arrangement due to the poor color expression characteristics.
A triangle type pixel arrangement having the good color expression characteristics used in LCDs is shown in FIG.
2
. The prior LCD having a triangle type pixel arrangement, includes a plurality of gate lines G
21
, G
22
, G
23
, . . . and a plurality of data lines D
21
, D
22
, D
23
, . . . The gate lines are elongated in the first direction which is a row direction and are spaced in a predetermined distance to isolate each other. The data lines are elongated with a zig-zag type in the second direction which is a column direction and are spaced in a predetermined distance to isolate each other. The gate lines and the data lines are crosses each other to define pixel regions PS
21
-PS
23
. R, G, and B dots are respectively disposed in the pixel regions PS
11
-PS
13
with a triangle arrangement, thereby constituting one pixel. In each of the pixel regions PS
21
-PS
23
, thin film transistors (TFTs) each of which its gate is connected to the corresponding gate line and its source or drain is connected to the corresponding data line, are respectively disposed at an intersections of the gate lines and the date lines. Accordingly, R, G and B dots RD, GD and BD are respectively disposed in the pixel regions PS
21
-PS
23
and the TFTs T
21
-T
23
for driving the R, G and B dots RD, GD and BD are respectively disposed in the pixel region, in like manner as shown in FIG.
1
. In pixel arrangement of
FIG. 2
, R, G and B dots constituting one pixel are arranged with a triangle arrangement.
The LCDs with a triangular arrangement of
FIG. 1
has a excellent color expression characteristics as compared with the LCDs with a stripe arrangement of FIG.
2
. However, because the data lines are arranged with a zig-zag form, the lengths of the data line become long and the resistances of the data lines become large, as compared with the data lines of the LCDs of FIG.
1
. Furthermore, the open fail becomes increased in the data lines due to a zig-zag arrangement.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a LCD having a redundancy against an open fail in data lines.
An another object of the present invention is to provide a LCD having a redundancy against an open fail in gate lines.
An another object of the present invention is to provide a LCD with a triangular arrangement having an excellent color expression characteristics and being capable of an oblique type graphic display.
A still another object of the present invention is to provide a LCD with a mosaic arrangement having an excellent color expression characteristics and being capable of an oblique type graphic display.
According to an aspect of the present invention, there is provided a liquid crystal display, comprising: a liquid crystal display, comprising: a plurality of gate lines being spaced in a selected distance; a plurality of data lines being spaced in a selected distance, the data lines where a data line driving signal is provided being crossed with the gate lines to define a plurality of R, G and B pixel regions, each of data lines being split into a pair of data lines; a plurality of R, G and B dots disposed in the R, G, and B pixel regions, respectively; and a plurality of switching devices disposed in the R, G, B pixel regions, each being connected to corresponding gate line and data line of a plurality of gate lines and data lines;
wherein by the split data lines, each of the R, G and B pixel regions is divided into a plurality of R, G and B sub pixel regions; and each of the R, G and B dots includes a plurality of R, G and B subdots, each of R, G and B subdots being disposed in each of R, G and B sub pixel regions, respectively.
In accordance with an embodiment of the present invention, each of the R, G and B dots is comprised of a pair of the R, G and B subdots and each of the R, G and B pixel regions is divided into a pair of the R, G and B subpixel regions and first R, G and B subdots of the pair of R, G and B subdots are disposed to correspond to a first data line of the split data lines and second R, G and B subdot of the pair of R, G and subdots are disposed to correspond to a second data line of the split data lines. The R, G and B pixel regions of the plurality of R, G, B pixel regions in adjacent gate lines are left-shifted or right-shifted by one subpixel region along the gate line respectively and the R, G and B dots which are disposed in the R, G are left-shifted or right-shifted by one subdot along the gate line respectively, thereby being arranged with a triangle form.
In accordance with an embodiment of the present invention, when each of R, G and B pixel regions is split into the pair of R, G and B subpixel regions by the pair of data lines, each of the R, G and B pixel regions which are defined by the odd gate lines is divided by the second data line of the split data lines and each of the R, G, B pixel regions which are defined by the even gate lines is divided by the first data line. The pair of the split data lines are arranged in parallel with each other and are simultaneously driven by the same data line driving signal. The R, G and B dots are disposed in the R, G and B subpixel regions with a zig-zag form along the data lines and the first R, G and B subdots of the R, G, B dots are disposed in the first R, G and B sub pixel regions of the R, G, B pixel regions which are formed by the odd lines of the plurality of the gate lines and the first data line of the split data lines and the second R, G and B subdots of the R, G, B dots are disposed in the second R, G and B sub pixel regions of the R, G, B pixel regions which are formed by the even lines of the plurality of the gate lines and the second data line of the split data lines, there
Choi Gyo Un
Shin Jae Hak
Chowdhury Tarifur R.
Hyundai Electronics Industries Co,. Ltd.
Ladas & Parry
Sikes William L.
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