KR100291506B1 - Liquid crystal display device - Google Patents

Abstract

PURPOSE: A liquid crystal display apparatus is provided to drive pixel at trouble of a gate line by forming a double gate line in the liquid crystal display, and to improve the yield rate by increasing redundancy with mosaic arrangement of pixels. CONSTITUTION: A liquid crystal display is composed of plural data lines(D31-39) arranged at regular intervals; plural gate lines(G31-35) crossed over data lines, and divided into two gate lines; R,G,B dots divided into plural sub dots(R,G,B) according to a couple of gate lines, and arranged in plural pixel ranges formed by data lines and gate lines; and switching units for driving R,G,B dots arranged in the pixel partition ranges, and connected to data lines and gate lines. The oblique graphic is displayed, and the color display is improved with mosaic pixel arrangement. The yield rate is increased with driving pixel by the other gate line in failure of the gate line with the double gate line structure.

Description

LCD

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a mosaic pixel array structure having an oblique graphic display and having a redundancy function for an open defect of a gate line.

The liquid crystal display device is composed of a color filter substrate expressing color by subtracting mixing of RGB, a TFT substrate for controlling each pixel, and a liquid crystal injected between the color filter substrate and the TFT substrate. The color filter substrate of the liquid crystal display device includes a plurality of pixels arranged in a matrix form of columns and rows. Each pixel consisted of a combination of red, green and blue dots.

Representative pixel array methods for arranging the pixels include a triangular array, a stripe array, and a mosaic array. The vertical stripe arrangement method as shown in FIG. 1 is mainly used for O / A.

Referring to FIG. 1, a plurality of gate lines G11, G12, G13,..., Arranged at a predetermined interval from each other in a vertical stripe array method are formed to extend in a column direction and are insulated from each other. The plurality of data lines D11, D12, D13, ... arranged at a predetermined interval from each other extend in a row direction to intersect the gate line, and are insulated from each other.

Further, in the pixel areas PS11 to PS13 formed by the data lines D11, D12, ... and the gate lines G11, G12, ..., respectively, R, G, B dots RD, GD, BD Are arranged to constitute one pixel.

In the pixel areas PS11 to PAS13, a dot in which a gate and a source or drain electrode are connected to a gate line and a data line at a portion where the data lines D11, D12,..., And the gate lines G11, G12,... The driving TFT switching elements T11, T12, and T13 are arranged respectively. Therefore, each R, G, B dot RD, GD, BD is arranged in one pixel area PS11, PS12, PS13, and each R, G, B dot is placed in each pixel area PS11-PS13. TFTs T11 to T13 for driving are arranged one by one, respectively.

Referring to the pixel array structure of FIG. 1, the R, G, and B dots RD, GD, and BD constituting one pixel are arranged in a vertical direction, respectively. That is, each of the R dots RD, G dots GD, and B dots BD is arranged in a straight line along the data line in the row direction.

The liquid crystal display device having the above vertical stripe array structure is a pixel array structure suitable for O / A, and its color implementation characteristics are not suitable for A / V as compared with the triangle array structure.

A pixel array structure in the form of a triangle or a pixel array structure in the form of a mosaic is proposed as a pixel array structure for improving color implementation characteristics. FIG. 2 illustrates a planar structure of a liquid crystal display device having a triangle array structure. In the liquid crystal display of FIG. 2, a plurality of gate lines G21, G22, G23,... Which are arranged at a predetermined interval from each other are elongated in the column direction, and are insulated from each other. In addition, a plurality of data lines D21, D22, D23, ... arranged at predetermined intervals are insulated from each other so as to cross the gate line, and are twisted in a row direction, that is, in a zig-zag form. Are arranged.

In addition, each of the pixel areas PS21 to PS23 formed by the data lines D21, D22, ..., and the gate lines G21, G22, ... has R, G, and B dots RD, GD, BD. ) Are arranged in triangle form.

Dots in which gates and source or drain electrodes are connected to gate lines and data lines at portions where the data lines D21, D22,..., And gate lines G21, G22,... The driving TFT switching elements T21-T23 are arranged. Also in the liquid crystal display of FIG. 2, as in FIG. 1, each of the R, G, and B dots RD, GD, and BD are arranged in one pixel area PS21, PS22, PS23, and each pixel area PS21-. In PS23, TFTs T21-T23 for driving each of the R, G, and B dots are arranged one by one.

The liquid crystal display device having the triangular pixel array structure of FIG. 2 has an advantage of superior color implementation characteristics as compared to the stripe pixel array structure of FIG. 1.

However, in the liquid crystal display device having a triangular array structure as shown in FIG. 2, since the data lines are arranged in a twisted shape, that is, in a zigzag shape, the data lines are longer than the data lines of FIG. As a result, the resistance of the data line is increased and the incidence of open defects of the data line is increased.

In addition, the conventional liquid crystal display device has a problem in that the yield is reduced because redundancy is not possible when the open defect of the gate line is processed, thereby failing.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object thereof is to provide a pixel array structure of a liquid crystal display device having a redundancy function against an open defect of a gate line.

Another object of the present invention is to provide a liquid crystal display device having a mosaic-like pixel array structure which is excellent in color implementation characteristics and capable of graphic display of diagonal lines.

Another object of the present invention is to provide a liquid crystal display device capable of reducing the RC delay of a data line than a conventional triangle pixel arrangement.

1 is a planar structure diagram of a liquid crystal display device having a pixel array structure of a conventional stripes;

2 is a planar structure diagram of a liquid crystal display device having a pixel array structure of a conventional triangle type;

3 is a planar structure diagram of a liquid crystal display device having a pixel-like pixel array structure according to an embodiment of the present invention;

(Explanation of symbols for the main parts of the drawing)

G11-G17, G21-G27, G31-G35: Gate line

D11-D16, D21-D26, D31-D39: Data Line

PS11-PS13, PS21-PS23, PS31-PS33: Pixel Area

T11-T13, T12-T23, T31-T33: TFT switching element

RD: R dot R: R subdot

GD: G dot G: G subdot

BD: B dot B: B subdot

In order to achieve the above object of the present invention, the present invention comprises a plurality of gate lines and data lines arranged to be spaced apart from each other; R, G, and B dots arranged in the pixel region formed by the data line and the gate line; A liquid crystal display device having R, G, and B dot driving switching elements arranged in a pixel area and connected to the data line and the gate line, wherein the gate line is divided into a pair of gate lines, and each pixel area Is divided into a plurality of pixel division regions along a pair of gate lines, and the R, G, and B dots are divided into subdots and arranged in the pixel division region.

According to an exemplary embodiment of the present invention, different R, G, and B subdots are arranged in the pixel division region of each pixel region, and two neighboring R, G, and B subdots arranged in each gate pair are adjacent to each other. In the data line, the same subdots are arranged diagonally shifted with respect to one of the neighboring data lines to form R, G, and B dots.

According to an exemplary embodiment of the present invention, subdots that are identically arranged in two neighboring data lines are connected to and driven in the same data line. R, G, and B subdots that are identically arranged in the two neighboring data lines are shifted to one of the upper side or the lower side and to one of the left side or the right side by one subdot and sequentially arranged.

According to an embodiment of the present invention, the separated pair of gate lines are arranged in parallel with each other, and the same gate line driving signal is applied and driven simultaneously.

According to an exemplary embodiment of the present invention, each pixel region is divided into two pixel division regions along a second gate line of a pair of gate lines, and the divided pixel division regions of each pixel region are divided among R, G, and B subdots. It is characterized in that different sub-dots are arranged. Two switching elements are arranged in each pixel area, and each switching element is arranged in each of the divided pixel division areas so that one switching device drives one servo dot.

According to the exemplary embodiment of the present invention, the switching elements arranged in two pixel areas are alternately arranged with respect to the gate line. Of the two switching elements arranged in each pixel division region, the switching elements arranged in the first pixel division region may be connected to a first gate line of a corresponding gate line pair among a plurality of gate line pairs and a corresponding data line among a plurality of data lines. The switching elements connected to and arranged in the second pixel division region are connected to the first gate line and the next data line of the next gate pair, respectively.

According to an exemplary embodiment of the present invention, switching elements arranged in the pixel division areas are arranged to be shifted with respect to one of the neighboring two data lines between two adjacent data lines. Switching elements arranged in neighboring data lines are commonly connected to one of the two data lines and simultaneously connected to the corresponding gate line pair among the plurality of gate line pairs and the first gate line of the next gate line pair. It is done.

The present invention also provides a plurality of data lines arranged at regular intervals from each other; A plurality of gate lines arranged at regular intervals to intersect the data lines, each of which is divided into a pair of gate lines; R, G, and B dots each divided into a plurality of subdots along the pair of gate lines, each subdot being arranged in a plurality of pixel division regions of a pixel region formed by the data line and the gate line, respectively. Wow; According to an aspect of the present invention, there is provided a liquid crystal display device including an R, G, and B dot driving switching element arranged in each pixel in the pixel division area and connected to the data line and the gate line.

According to an exemplary embodiment of the present invention, each pixel region is divided into two pixel division regions along a second gate line of a pair of gate lines, and the divided pixel division regions of each pixel region are divided among R, G, and B subdots. It is characterized in that different sub-dots are arranged.

According to an exemplary embodiment of the present invention, in two data lines adjacent to each other among the R, G, and B subdots arranged in each gate pair, the same subdots are alternately arranged with respect to one of the two neighboring data lines to form a mosaic. It characterized by comprising the R, G, B dot.

According to an exemplary embodiment of the present invention, two switching elements are arranged in each pixel region, and each of the switching elements is arranged one by one in a divided pixel division region, and two switching elements are connected to one pair of gate lines, respectively. It is characterized in that one switching device drives the servodots.

According to the exemplary embodiment of the present invention, the switching elements arranged in two pixel areas are alternately arranged with respect to the gate line. Of the two switching elements arranged in each pixel division region, the switching elements arranged in the first pixel division region may be connected to a first gate line of a corresponding gate line pair among a plurality of gate line pairs and a corresponding data line among a plurality of data lines. The switching elements connected to and arranged in the second pixel division region are connected to the first gate line and the next data line of the next gate pair, respectively.

According to an exemplary embodiment of the present invention, switching elements arranged in the pixel division areas are arranged to be shifted with respect to one of the neighboring two data lines between two adjacent data lines. Switching elements arranged in neighboring data lines are commonly connected to one of the two data lines and simultaneously connected to the corresponding gate line pair among the plurality of gate line pairs and the first gate line of the next gate line pair. It is done.

According to an embodiment of the present invention, the separated pair of gate lines are arranged in parallel with each other, and the same gate line driving signal is applied and driven simultaneously.

The liquid crystal display device of the present invention is capable of diagonal graphic display by separating the gate lines into dual gate lines and arranging pixels in a mosaic form, and is excellent in application to A / V liquid crystal display devices. Obtain color implementation characteristics.

In addition, redundancy with respect to open defects in the gate line is possible, thereby improving yield.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 illustrates a liquid crystal display device having a pixel array structure in a mosaic form according to an embodiment of the present invention. Referring to FIG. 3, in the liquid crystal display according to the exemplary embodiment of the present invention, a plurality of gate lines G31, G32, G33,... Which are arranged at regular intervals are extended in the column direction and are insulated from each other. . The plurality of data lines D31, D32, D33, ... arranged at regular intervals from each other extend in a row direction to intersect the gate line and are insulated from each other.

In the present invention, the data lines are twisted as in FIG. 2 so that the data lines are not arranged, but are arranged in parallel with each other as in FIG.

In the present invention, the gate lines G31, G32, ... are each pair of gate lines G31a, G31b, G32a, G32b,. It is separated into a double gate line structure. 1 pair of gate lines G31a and G31b, G32a and G32b,... Each same gate line drive signal is applied to the pair of gate lines to be driven simultaneously.

In the present invention, the gate lines are arranged in a double gate line structure so that each pixel region PS31 to PS33 is divided into two pixel division regions PS31a and PS31b to support the gate lines G31, G32, .... PS33b). At this time, each pixel area PS31 to PS33 is divided into two pixel division areas along the second gate line G31b, G32b, ... of the pair of gate lines G31, G32, ....

Different subdots are arranged in each divided pixel division region, and these are arranged with regularity. Referring to FIG. 3, R, G, and B subdots are regularly arranged with three data lines, and the same subdots are arranged diagonally in neighboring data lines.

For example, in the first data line and the second data lines D31 and D32, the G sub-dots G are arranged in a diagonal direction with respect to the second data line D32, and the second data line and the third data line are arranged. In the data lines D32 and D33, the B subdots B are arranged diagonally with respect to the third data line D33. In addition, R subdots R are arranged in a diagonal direction with respect to the fourth data line D34 in the third data line and the fourth data line D33 and D34.

Accordingly, the G sub-dots G are arranged in a diagonal direction with respect to the second data line D32 in the first data line and the second data lines D31 and D32 to form a zigzag shape. In the second data line and the third data lines D32 and D33, the B subdots B are arranged in a diagonal direction with respect to the third data line D33 to form a zigzag shape. In the third data line and the fourth data lines D33 and D34, the R subdots R are arranged to be diagonally offset with respect to the fourth data line D34 to form a zigzag shape.

In the liquid crystal display element according to the embodiment of the present invention, two dot driving TFT switching elements are arranged per dot. That is, one switching element is arranged per sub dot.

Therefore, in each pixel division region, the pair of gate lines G31a and G31b, G32a and G32b,... At the intersection of the data lines D1, D2, ..., the sub-dot driving TFT switching elements T31a, T31b, T32a, T32b, ..., whose gate and source or drain electrodes are connected to the gate line and the data line, respectively; Is arranged.

At this time, in each pixel region PS31, P32, ..., the first pixel division regions PS31a, T31a, T31b, T32a, T32b, ... which drive the respective R, G, and B subdots. The TFT switching elements T31a, T32a, ... arranged in the PS32a, ... are connected to the first gate line G31a, G32a, ... of the pair of gate lines of the corresponding scanning line and the corresponding data line.

However, the TFT switching elements T31b, T32b, ... arranged in the second pixel division regions PS31b, PS32b, ... are separated from the first gate lines G31a, G32a, ... of the pair of gate lines of the next scan line. It is connected to the next data line. Therefore, the TFT switching elements arranged in each pixel division region of one pixel region are arranged in the opposite direction with respect to the second gate line of the pair of gate lines.

Taking the first pixel region PS31 as an example, in the first pixel division region PS31a, a TFT switching device has a gate connected to the first gate line G31a of the first gate pair G31, and the drain of the first data. Is connected to line D31. In the second pixel division region PS31b, the TFT switching element has a gate connected to the first gate line G32a of the second gate pair G32, and a drain thereof connected to the second data line D2.

Further, TFT switching elements T32a, T31b, T33a, T32b,..., For driving the same subdots arranged among two subdots arranged in two neighboring data lines. Are alternately arranged in opposite directions with respect to one of the two neighboring data lines.

For example, in the first data line and the second data lines D31 and D32, the second pixel of the first pixel area PS31 of the same sub-dots G is arranged in an excellent manner with respect to the second data line D32. The TFT switching element T31b arranged in the pixel division region PS31a has a gate connected to the first gate line G32a of the second gate line pair G32 corresponding to the next scan line, and the drain thereof has the next data line ( D32).

On the other hand, the TFT switching element T32a arranged in the first pixel division region PS32a of the second pixel region PS32 of the same sub-dot G has a gate pair G31 of which the gate corresponds to the current scan line. Is connected to the first gate line G31a and the drain is connected to the corresponding data line D32.

That is, a TFT switching element for driving the same subdots arranged in two neighboring data lines is commonly connected to one of the two neighboring data lines.

In addition, in the present invention, two sub-dots that are identical to two neighboring data lines are shifted along the gate line by one sub-dot and arranged in such a manner that the same two sub-dots arranged in this manner are in the order of R, G, and B sub-dots. Since the pixels are arranged along the gate lines, R, G, and B subdots of different colors are arranged in the pixel division region of one pixel region.

Accordingly, in the liquid crystal display device of the present invention as described above, the sub-dots arranged along each pair of gate lines are driven with two shifted switching elements arranged each time the data lines are sequentially driven. The R, G, and B dots RD, GD, and BD are driven in a mosaic form.

When the sub dots arranged along each gate pair are sequentially driven along the data line, the same two R, G, and B subdots arranged to be offset from the same data line are sequentially driven. The sub dots connected to the same gate line pair are driven in a mosaic form because the sub dots are shifted up or down and left or right whenever the data lines are sequentially driven.

For example, when the second data line D32 is driven, the first and second data line pairs G31 and G32 are driven, and the first gate line G31a, 32a,... The switching elements T31b and T32a connected to the C-D are driven to drive the G-dots arranged in a good manner to drive the G dots, and when the third data line D33 is driven, the data line D33 and the first gate are driven. The switching elements T32b and T33a connected to the lines G31a, G32a, ... are driven to drive the B subdots arranged to be offset. At this time, the B dot is shifted by one sub dot to the right from the G dot.

Subsequently, when the fourth data line D34 is driven, the switching elements T33b and T34a connected to the data line D34 and the first gate lines G31a, 32a, ... are driven to form an excellently arranged R subdot. Is driven to drive the R dot. At this time, the R dot is shifted by one sub dot to the right from the B dot which was driven when the third data line D33 was driven.

As described above, in the present invention, the R, G, and B dots are shifted up or down and left, or right, by one subdot as the data lines are driven aberrationally, so that the R, G, and B subdots are mosaic. Will be driven.

In the liquid crystal display of the present invention, redundancy with respect to the open defect of the gate line is possible, but in the case of the liquid crystal display of FIGS. 1 and 2, redundancy is not possible when an open defect occurs in the gate line. For example, in the liquid crystal display of FIGS. 1 and 2, when an open defect occurs in the gate lines G12 and G22, the driving of the switching element connected to the second gate line in which the open occurs is impossible. As a result, R, G, and B dot driving in the open gate line was not possible, causing a failure.

However, in the liquid crystal display of the present invention, for example, assuming that an open defect occurs in G32a of the pair of gate lines G32a and G32b constituting the second gate line G32, the first gate line ( The sub-dots connected to G32a) are not driven, but the redundancy for the open defect of the gate line is enabled by driving the sub-dots arranged in the remaining pixel division regions by the adjacent first gate pair and the third gate pair.

According to the present invention as described above, the data lines are sequentially arranged by separating the gate lines into a pair of gate lines, arranging one pixel region into two pixel division regions, and arranging the same subdots in two neighboring data lines. As the R, G, and B dots are driven by being shifted up, down, left, and right by one subdot, the pixels may be driven in a mosaic form.

As a result, it is possible to display a graphic in an oblique form as well as to improve the color realization characteristics required in the A / V liquid crystal display device.

In addition, in the liquid crystal display device of the present invention, since the data line is formed to extend in a straight line, the length of the data line is reduced than in the conventional triangle structure to reduce the RC delay.

In addition, the liquid crystal display of the present invention can form a gate line in a double gate line structure so that even if an open defect occurs in one gate line and the pixel can be driven by another gate line, a redundancy function is added to improve the yield. There is an advantage that can be improved.

In addition, this invention can be implemented in various changes within the range which does not deviate from the summary.

Claims (19)

A plurality of gate lines and data lines arranged at regular intervals crossing each other; R, G, and B dots arranged in the pixel region formed by the data line and the gate line; A liquid crystal display device comprising: switching elements for R, G, and B dot driving arranged in a pixel area and connected to the data line and the gate line; The gate line is divided into a pair of gate lines, each pixel region is divided into a plurality of pixel division regions along the pair of gate lines, and the R, G, and B dots are divided into subdots, and the R And, in two data lines adjacent to each other among the G and B subdots, the same subdot is arranged in the pixel division region to be shifted diagonally with respect to one of the neighboring data lines. The liquid crystal display of claim 1, wherein different R, G, and B subdots are arranged in the pixel division region of each pixel region. The liquid crystal display of claim 1, wherein sub-dots arranged in two adjacent data lines are connected to the same data line and driven. The method of claim 3, wherein the R, G, and B subdots that are identically arranged in the two neighboring data lines are sequentially shifted to one of the upper side or the lower side and one of the left side or the right side by one subdot. Liquid crystal display device. The liquid crystal display device according to claim 1, wherein the pair of separated gate lines are arranged in parallel to each other so that the same gate line driving signal is applied and driven simultaneously. 2. The pixel region of claim 1, wherein each pixel region is divided into two pixel division regions along a second gate line of a pair of gate lines, and the divided pixel division regions of each pixel region are different from each other among R, G, and B subdots. A liquid crystal display device, characterized in that the sub-dots are arranged. The liquid crystal display according to claim 6, wherein the switching elements are arranged one by one in the divided pixel division region in which two switching elements are arranged in each pixel area so that one switching element drives one servo dot. device. 8. The liquid crystal display device according to claim 7, wherein the two switching elements arranged in each pixel area are arranged alternately with respect to the gate line. The switching device of claim 8, wherein the switching device arranged in the first pixel division area among the two switching devices arranged in each pixel division area comprises: a first gate line and a plurality of data lines of a corresponding gate line pair among a plurality of gate line pairs; And a switching device connected to a corresponding data line and arranged in a second pixel division region is connected to a first gate line and a next data line of a next gate pair, respectively. 8. The liquid crystal display device according to claim 7, wherein switching elements arranged in the pixel division areas are arranged so as to be shifted with respect to one of the neighboring two data lines between two adjacent data lines. The switching device of claim 10, wherein the switching elements arranged in neighboring data lines are commonly connected to one of the two data lines, and corresponding gate line pairs among the plurality of gate line pairs and first gate lines of the next gate line pair. Liquid crystal display device, characterized in that connected to each. A plurality of data lines arranged at regular intervals from each other; A plurality of gate lines arranged at regular intervals to intersect the data lines, each of which is divided into a pair of gate lines; The sub-dots are respectively divided into a plurality of sub-dots along the pair of gate lines, and each sub-dot is arranged in a plurality of pixel division regions of the pixel region formed by the data line and the gate line, respectively. Two data lines adjacent to each other among the sub-dots in which the same sub-dots are arranged in a diagonally displaced direction with respect to one of the neighboring data lines to form mosaics; And R, G, and B dot driving switching elements arranged in the pixel division area, one for each sub dot and connected to the data line and the gate line. 13. The pixel array of claim 12, wherein each pixel region is divided into two pixel division regions along a second gate line of a pair of gate lines, and the divided pixel division regions of each pixel region are different from each other among R, G, and B subdots. A liquid crystal display device, characterized in that the sub-dots are arranged. The method of claim 12, wherein two switching elements are arranged in each pixel area, and each of the switching elements is arranged one by one in a divided pixel division area, and two switching elements are connected to one pair of gate lines, respectively. A liquid crystal display device characterized in that one switching device drives a dot. 15. The liquid crystal display device according to claim 14, wherein the two switching elements arranged in each pixel area are alternately arranged with respect to the gate line. 16. The switching device of claim 15, wherein the switching elements arranged in the first pixel division region of the two switching elements arranged in each pixel division region are each of the first gate line and the plurality of data lines of the corresponding gate line pair among the plurality of gate line pairs. And a switching device connected to a corresponding data line and arranged in a second pixel division region is connected to a first gate line and a next data line of a next gate pair, respectively. 15. The liquid crystal display device according to claim 14, wherein the switching elements arranged in the pixel division areas are arranged to be shifted with respect to one of the neighboring two data lines between two adjacent data lines. 18. The first gate line of claim 17, wherein the switching elements arranged in neighboring data lines are commonly connected to one of the two data lines, and at the same time, corresponding gate line pairs among the plurality of gate line pairs and first gate lines of the next gate line pair. Liquid crystal display device, characterized in that connected to each. 14. The liquid crystal display device according to claim 13, wherein the separated pair of gate lines are arranged in parallel to each other so that the same gate line driving signal is applied and driven at the same time.

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