KR100465025B1 - liquid crystal display devices - Google Patents

Abstract

The present invention relates to a pixel array structure of a liquid crystal display device.

In the conventional liquid crystal display device, since the number of data wirings is larger than the number of gate wirings, the number of data driving circuits is larger than the number of gate driving circuits. In general, the price of the data driving circuit is relatively higher than that of the gate driving circuit. Since it is expensive, the manufacturing cost has a big disadvantage.

In the liquid crystal display according to the present invention, a pixel region is formed by crossing a horizontal gate line and a data line in a vertical direction, and one pixel has three subpixels. The cost of manufacturing can be reduced by reducing the number of furnaces.

Description

Liquid crystal display devices

The present invention relates to a liquid crystal display device, and more particularly, to a pixel array structure of a liquid crystal display device.

In general, a liquid crystal display device is formed by arranging two substrates having electrodes formed on one surface thereof so that the surfaces on which the two electrodes are formed face each other, injecting a liquid crystal material between the two substrates, and then applying voltage to the two electrodes. By moving the liquid crystal molecules by the electric field, it is a device that represents the image by controlling the transmittance of the light is changed accordingly.

The liquid crystal display may be formed in various forms. Currently, an active matrix LCD (AM-LCD) in which a thin film transistor and pixel electrodes connected to the thin film transistor are arranged in a matrix manner has excellent resolution and video performance. It is most noticed.

Hereinafter, a conventional liquid crystal display device will be described with reference to the accompanying drawings.

FIG. 1 is a diagram illustrating a pixel structure of a general liquid crystal display, and as illustrated, gate wirings 21, 22, ..., and data wirings 31, 32, 33, 34, 35, 36, ... ) Intersect to define the pixel area, one pixel 40 is composed of red, green, and blue sub-pixels (41, 42, 43). Here, the array of pixels forms a vertical stripe structure in which the sub pixels 41, 42, and 43 are sequentially arranged in the horizontal direction, and the vertical stripe method is most used. In addition, the pixel array may form a delta method in which the sub pixels 41, 42, and 43 are arranged in a triangular shape, and a quad method in which four sub pixels form one pixel.

At this time, each of the sub-pixels 41, 42, and 43 is formed such that the pitch in the vertical direction is three times the pitch in the horizontal direction, so that one pixel 40 has the same pitch horizontally and vertically.

The structure of one sub pixel in the conventional liquid crystal display is shown in FIG. 2. As shown in the figure, a portion where the gate line 41 extending in the horizontal direction and the data line 42 extending in the vertical direction cross each other to define a pixel area, and the portion where the gate line 41 and the data line 42 intersect. The thin film transistor T is formed. Subsequently, a pixel electrode 43 is formed in the pixel area. The pixel electrode 43 is connected to the thin film transistor T and overlaps the gate line 41 to form a storage capacitor Cst. As mentioned above, since the sub-pixel has a ratio of 1: 3 in the horizontal pitch and the vertical pitch, the pixel electrode 43 is formed such that the length in the vertical direction is three times the length in the horizontal direction.

When the resolution of the liquid crystal display device is M × N, each pixel includes three sub pixels in the horizontal direction, so the number of sub pixels is (M × 3) × N. Therefore, the number of data wirings (31, 32, 33, 34, 35, 36, ... in FIG. 2) becomes (Mx3), and the number of gate wirings (21, 22, ... in FIG. The number is N.

An array substrate structure of such a liquid crystal display device is schematically illustrated in FIG. 3.

As shown in FIG. 3, there is an array panel 50 that implements an image and includes a plurality of thin film transistors and pixel electrodes (not shown), and a thin film transistor is provided on the left side of the array panel 50. A gate driver circuit 51 is disposed to transfer a gate signal to the gate driver circuit 51, which is a tape carrier package (hereinafter referred to as TCP) (not shown). Are connected by Subsequently, a data driving circuit 52 for transmitting a data signal is connected to the upper side of the array panel 50 by TCP (not shown).

Here, the number of gate driving circuits and data driving circuits 51 and 52 is a value obtained by dividing the number of wirings by the number of channels of TCP, that is, the number of wirings connected to one TCP. Therefore, the number of uses of the gate driving circuit 51 is N / (number of TCP channels), and the number of uses of the data driving circuit 52 is (M × 3) / (number of TCP channels).

As described above, in the conventional liquid crystal display device, since the number of data wirings is larger than the number of gate wirings, the number of data driving circuits is larger than the number of gate driving circuits. In general, the price of the data driving circuit 52 is higher than that of the gate driving circuits. Since it is relatively expensive compared to 51), the manufacturing cost is large.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an arrangement structure of a liquid crystal display device which can reduce manufacturing costs by reducing the number of data driving circuits.

1 is a diagram illustrating a pixel structure of a general liquid crystal display device.

2 is a diagram showing the structure of one sub-pixel in a conventional liquid crystal display.

3 is a view schematically showing an array substrate structure of a conventional liquid crystal display device.

4 is a diagram illustrating a pixel array structure of a liquid crystal display according to a first exemplary embodiment of the present invention.

5 is a diagram illustrating one pixel structure of a liquid crystal display according to a first embodiment of the present invention.

FIG. 6 is a diagram schematically showing an array substrate structure of a liquid crystal display device according to a first embodiment of the present invention. FIG.

7 is a diagram illustrating a pixel array structure of a liquid crystal display according to a second exemplary embodiment of the present invention.

FIG. 8 is a diagram schematically showing an array substrate structure of a liquid crystal display according to a second embodiment of the present invention. FIG.

9 is a diagram illustrating a pixel array structure according to a third embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

Gate wiring: 121, 122, 123, 124, 125, 126, ...

131, 132, ...: data wiring

140: pixels

141, 142, 143: sub pixel

In the liquid crystal display according to the present invention for achieving the above object, a plurality of gate wires extend in the horizontal direction, and a plurality of data wires extend in the vertical direction to intersect the gate wires to define the sub-pixels. Subsequently, M × N pixels (M and N are integers) of sub pixels arranged in the vertical direction and implementing red, green, and blue colors, respectively, are arranged in a gate driving circuit for applying a signal to the gate wiring. Data driving circuits for applying signals to the furnace and data wirings are arranged.

Here, the sub-pixels may have a pitch in the horizontal direction three times that of the vertical direction.

The number of gate wirings may be N × 3, and the number of data wirings may be M.

In another liquid crystal display according to the present invention, a plurality of gate lines extend in a horizontal direction, and a plurality of data lines extend in a vertical direction to intersect the gate lines to define a sub pixel. Subsequently, M × N (M) is formed of the first and second sub-pixels adjacent to each other in the vertical direction and the third sub-pixels adjacent to the first and second sub-pixels in the vertical direction. , N is an integer number of pixels, and a gate driving circuit for applying a signal to the gate wiring and a data driving circuit for applying a signal to the data wiring are arranged.

Here, the number of gate lines may be N × 2, and the number of data lines may be M × 2.

Meanwhile, the third sub pixel may implement blue, and the first and second sub pixels may implement red and green, respectively. In this case, the first and second sub-pixels of the pixel adjacent to the third sub-pixel may implement green and red, respectively.

As described above, in the liquid crystal display according to the present invention, the gate lines in the horizontal direction and the data lines in the vertical direction cross each other to form a pixel area, and one pixel has three sub pixels, so that the sub pixels are arranged in the vertical direction. As a result, the number of data driving circuits can be reduced, thereby reducing manufacturing costs.

Hereinafter, a liquid crystal display according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, FIG. 4 is a diagram illustrating a pixel array structure of a liquid crystal display according to a first embodiment of the present invention.

As illustrated, the gate wirings 121, 122, 123, 124, 125, 126, ... extending in the horizontal direction and the data wirings 131, 132, ... extending in the vertical direction intersect the pixel. To define an area, one pixel 140 includes first to third sub-pixels 141, 142, and 143 that implement red, green, and blue colors, respectively. Here, the first to third sub pixels 141, 142, and 143 are sequentially arranged in the vertical direction. In this case, each of the sub pixels 141, 142, and 143 has a horizontal pitch and a vertical pitch of 3: 1, and one pixel 140 has the same horizontal and vertical pitch.

One pixel structure of the liquid crystal display according to the first exemplary embodiment of the present invention is illustrated in FIG. 5. As shown in the drawing, the horizontal gate lines 151 and the vertical data lines 152 intersect to define pixel regions, and the gate lines 151 and the data lines 152 intersect with each other. The thin film transistor T1 is formed to switch the image signal from the data line 152. Subsequently, a pixel electrode 153 connected to the thin film transistor T1 is formed in the pixel region, and the pixel electrode 153 overlaps the gate wiring 151 to form a storage capacitor Cst1. Here, the pixel electrode 153 is formed such that the length in the horizontal direction is three times the length in the vertical direction.

When the resolution of the liquid crystal display according to the present invention is M × N, each pixel includes three sub pixels in the vertical direction, so the number of sub pixels is M × (N × 3) and the number of gate wirings is (N x 3), and the number of data wires is N.

6 illustrates an array substrate structure of a liquid crystal display device according to a first exemplary embodiment of the present invention. As illustrated, a gate driving circuit 161 for transmitting a gate signal to the thin film transistor is provided on the left side of the array panel 160 including a plurality of gate lines, data lines, thin film transistors, and pixel electrodes (not shown). Although arranged, the gate driving circuit 161 is connected to the gate wiring of the array panel 160 by TCP (not shown). Subsequently, a data driving circuit 162 for transmitting a data signal is disposed above the array panel 160, and the data driving circuit 162 is connected to the data wiring of the array panel 160 by TCP.

In the present invention, since the number of gate wirings is (N × 3) and the number of data wirings is M, the number of uses of the gate driving circuit 161 is (N × 3) / (number of TCP channels), and the data driving circuit The number of uses of 162 is M / (number of TCP channels).

Therefore, the number of gate driving circuits 161 increases and the number of data driving circuits 162 decreases. At this time, the number of relatively expensive data driving circuits 162 is reduced to 1/3, thereby reducing manufacturing costs. Can be.

Meanwhile, in the first embodiment, since one pixel has three gate wires, the gate charging time of one pixel is reduced by one third. Accordingly, to compensate for this, the sub-pixels may be mixed with the vertical array and the horizontal array. The pixel array structure of the liquid crystal display according to the second exemplary embodiment of the present invention is illustrated in FIG. 7.

As shown, in the second embodiment of the present invention, the horizontal gate wirings 221, 222, 223, 224, ... and the vertical data wirings 231, 232, 233, 234, ... The intersections define pixel regions, and one pixel 240 includes first to third sub-pixels 241, 242, and 243 for implementing red, green, and blue colors, respectively. In this case, the first and second sub pixels 241 and 242 are adjacent in the vertical direction, and the third sub pixel 243 is adjacent to the first and second sub pixels 241 and 242 in the horizontal direction.

Therefore, since one pixel 240 includes two gate wires and two data wires, when the resolution of the liquid crystal display device is M × N, the number of gate wires becomes N × 2, and the number of data wires Becomes M × 2.

8 illustrates an array substrate structure of a liquid crystal display device having a pixel array structure according to a second exemplary embodiment of the present invention. As shown, a gate driving circuit 251 is disposed on the left side of the array panel 250 including a plurality of gate wirings, data wirings, thin film transistors, and pixel electrodes (not shown), and the array panel 250 ), A data driver circuit 252 is disposed above.

Since the number of gate wirings is (N × 2) and the number of data wirings is (M × 2), the number of gate driving circuits 251 is (N × 2) / (number of TCP channels), and the data The number of driving circuits 252 is (M × 2) / (number of TCP channels).

Therefore, in the second embodiment of the present invention, while the number of data driving circuits is reduced to 1/2 compared to the conventional one, the number of gate wirings is reduced to 2/3 compared to the first embodiment, so that the gate wiring is charged. The time can be increased by about 17%.

Meanwhile, in the second embodiment of the present invention, the colors of the first and second sub-pixels are the same for each pixel, but they may be formed differently.

The pixel array structure according to the third embodiment of the present invention is illustrated in FIG. 9, and as shown, the gate wirings 321, 322, 323, 324, ... and the data wirings 331, 32, 333, 334. ) Cross each other to form a pixel area, and each pixel 340 and 350 includes first to third sub pixels 341, 351, 342, 352, 343, and 353. Here, the third sub pixels 343 and 353 implement blue, the first and second sub pixels 341 and 342 of the first pixel 340 implement red and green, respectively, and the first pixel 340. ) And the first and second sub pixels 351 and 352 of the second pixel 350 horizontally adjacent to each other implement green and red colors, respectively.

The present invention is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit of the present invention.

In the liquid crystal display according to the present invention, a pixel region is formed by crossing a horizontal gate line and a data line in a vertical direction, and one pixel has three subpixels. The cost of manufacturing can be reduced by reducing the number of furnaces.

Meanwhile, the first and second sub pixels are adjacent in the vertical direction, and the third sub pixel is adjacent in the horizontal direction, thereby reducing the charge time of the gate wiring while reducing the number of data driving circuits. Deterioration can also be prevented.

Claims (10)

delete delete delete delete A plurality of gate wires extending in a horizontal direction; A plurality of data lines extending in a vertical direction and crossing the gate lines to define sub-pixels; Colors of red, green, and blue are respectively implemented, and M × N (M, wherein the first and second sub-pixels adjacent in the vertical direction and the third sub-pixels adjacent in the horizontal direction are adjacent to the first and second sub-pixels. N is an integer) pixels; A gate driving circuit for applying a signal to the gate wiring; A data driving circuit for applying a signal to the data line Liquid crystal display comprising a. The method of claim 5, wherein And the number of gate wirings is N × 2. The method of claim 6, The number of said data wiring is Mx2, The liquid crystal display device. The method of claim 5, wherein The third sub pixel implements blue. The method of claim 8, The first and second sub pixels may implement red and green colors, respectively. The method of claim 9, The first and second sub-pixels of the pixel adjacent to the third sub-pixel implement green and red, respectively.