KR20080002336A - A liquid crystal display device - Google Patents

Abstract

An LCD(Liquid Crystal Display) is provided to reduce contact errors between output terminals and pad terminals by forming the output terminals, formed in a TCP(Tape Carrier Packages) supply line of a first data TCP, in a side of the first data TCP. An LC(Liquid Crystal) panel has plural gate lines(120) and plural data lines(118) crossing each other. In a PCB(Printed Circuit Board)(112), plural driving circuits for supplying various power and control signals are mounted. Plural TCPs(Tape Carrier Packages)(108) are connected to the PCB through plural input terminals(141,151), and connected to the LC panel through plural output terminals(142,152). The plural output terminals formed on the at least one TCP comprise first and second output terminals. A direction that the first output terminals are arranges is different from a direction that the second output terminals are arranged.

Description

Liquid crystal display device

1 is a view showing a conventional liquid crystal display device

2 is a view showing a liquid crystal display device according to an embodiment of the present invention.

3 is a view showing the first data TCP of FIG.

* Explanation of symbols on the main parts of the drawings

112: data printed circuit board 101: liquid crystal panel

108: data TCP 114: gate TCP

122: TCP supply line 151: input terminal

152: output terminal 141: input terminal

142: output terminal 124: TCP input line

125: TCP output line 120: gate line

118: data line 123: link line

102 thin film transistor array substrate 121 image display area

104: color filter substrate 128: TCP supply line

116: gate driving integrated circuit 130: TCP output line

126: line-on-glass signal line 110: data driving integrated circuit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device capable of preventing poor contact of an output terminal of data TCP.

In general, a liquid crystal display is a thin film transistor array substrate and a color filter substrate facing each other are bonded to maintain a constant cell-gap, the thin film transistor array substrate and It consists of a liquid crystal display panel in which a liquid crystal layer is formed in a certain cell gap of a color filter substrate, and a driving circuit for driving the liquid crystal display panel.

The thin film transistor array substrate has gate lines arranged to be uniformly spaced apart in the lateral direction and data lines arranged to be regularly spaced apart in the longitudinal direction intersect with each other, and are divided by the crossing gate lines and the data lines. Pixels are defined in the rectangular regions. The pixels are arranged on the thin film transistor array substrate in a matrix form.

In addition, a color filter of red, green, and blue is formed at a position corresponding to the pixels on the color filter substrate, and a black matrix for preventing color interference of light passing through the color filter includes the color matrix. A common electrode is formed in a net shape surrounding the outside of the filter and applies an electric field to the liquid crystal layer together with the pixel electrode of the thin film transistor array substrate.

A pixel electrode and a common electrode are provided on an inner surface of the thin film transistor array substrate and the color filter substrate facing each other, and the liquid crystal molecules of the liquid crystal layer are driven by the voltage difference between the pixel electrode and the common electrode and applied to the pixels. The brightness of the image displayed on the liquid crystal display panel changes according to the size of the image information.

Switching elements such as thin film transistors are individually provided in the pixels, wherein a gate electrode of the thin film transistor is electrically connected to the gate lines, a source electrode is electrically connected to the data lines, and a drain electrode. Is electrically connected to a pixel electrode provided in the pixel. Accordingly, the source electrode receives image information through the data lines, and the image information is applied to the pixel electrode through the drain electrode, so that a voltage difference is generated between the pixel electrode and the common electrode. They cause an array change to change the light transmittance of the liquid crystal layer.

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

1 is a view showing a conventional liquid crystal display device.

The liquid crystal display device includes a liquid crystal display panel 1 having a thin film transistor array substrate 2 and a color filter substrate 4 bonded thereon, and a plurality of data connecting the liquid crystal display panel 1 and the data printed circuit board 12 to each other. It consists of TCP8.

A plurality of gate lines 18 and a plurality of data lines 20 intersecting each other are formed in the liquid crystal display panel 1.

The data driving integrated circuit 10 is mounted on the data TCP 8, and TCP input lines 24 and TCP output lines 25 electrically connected to the data driving integrated circuit 10 are formed.

An input terminal 41 is formed at the end of each TCP input line 24, and an output terminal 42 is formed at the end of each TCP output line 25.

In this case, the TCP input lines 24 of the data TCP 10 are electrically connected to output lines (not shown) of the data printed circuit board 12 through the input terminals 41 and the data TCP 10. TCP output lines 25 are electrically connected to the link lines 23 of the pad area through the output terminals 42.

In particular, the first data TCP 8 is further provided with TCP supply lines 22 which are electrically connected to the line-on-glass signal lines 26 on the thin film transistor array substrate 2. An input terminal 51 is formed at one end of each TCP supply line 22, and an output terminal 52 is formed at the other end.

The TCP supply line 22 applies gate driving signals of the timing control unit and the power supply unit applied through the data printed circuit board 12 to the line-on-glass signal lines 26. To this end, the TCP supply line 22 is connected to the data printed circuit board 12 through the input terminals 51 and the line-on-glass signal line 26 through the output terminals 52. Is connected to the field.

The output terminal 52 of the TCP supply line 22 and the output terminal 42 of the TCP output line 25 are formed below the first data TCP 8.

That is, the output terminal 52 of the TCP supply line 22 and the output terminals 42 of the TCP output line 25 are arranged in the same direction as the direction in which the data lines 18 are arranged. In other words, the output terminals 42 are arranged along the X-axis direction of FIG. 1.

As the liquid crystal display becomes larger, the number of data lines 18 formed in the display increases. Accordingly, the number of data driving integrated circuits 10 and data TCP 8 for driving the data lines 18 also increases.

Therefore, as the liquid crystal display device becomes larger, the distance between the output terminals 42 of the data TCP 8 becomes narrower, and the width of each output terminal 42 is inevitably reduced. Then, when the data TCP 8 is attached to the liquid crystal panel 1, the output terminal 42 of the data TCP 8 and the pad terminal (not shown) of the link line 23 are correctly connected. It is difficult to do. Accordingly, contact failure occurs because the output terminal 42 of the data TCP 8 and the pad terminal of the link line 23 corresponding thereto are not correctly connected.

In particular, this problem occurs more frequently in the first data TCP 8 having more output terminals than the other data TCP 8.

The present invention has been made to solve the above problems, by forming an output terminal formed on the TCP supply line of the first data TCP on the side of the first data TCP can reduce the poor contact between the output terminal and the pad terminal It is an object to provide a liquid crystal display device.

According to an aspect of the present invention, there is provided a liquid crystal display device including: a liquid crystal panel having a plurality of gate lines and a plurality of data lines crossing each other; A printed circuit board mounted with a plurality of driving circuits for supplying various power and control signals; A plurality of Tape Carrier Packages (TCPs) connected to the printed circuit board through a plurality of input terminals and connected to the liquid crystal panel through a plurality of output terminals; The plurality of output terminals formed on the at least one TCP are composed of a plurality of first output terminals and second output terminals, and the directions in which the first output terminals are arranged and the directions in which the second output terminals are arranged are different from each other. It is characterized by.

Here, the direction in which the first output terminals are arranged is the same as the direction in which the data lines are arranged.

The first output terminal is connected to the data lines.

The direction in which the second output terminals are arranged is the same as the direction in which the gate lines are arranged.

The second output terminals may be connected to line-on-glass signal lines that transmit signals required to drive the gate line.

The second output terminal is characterized in that formed in the outermost TCP of the TCP.

And a plurality of data driver integrated circuits mounted on each TCP and configured to drive data lines by receiving power and control signals from the driving circuits.

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.

2 is a view showing a liquid crystal display device according to an embodiment of the present invention, Figure 3 is a view showing the first data TCP of FIG.

Referring to FIG. 2, a liquid crystal display device includes a liquid crystal display panel 101 in which a thin film transistor array substrate 102 and a color filter substrate 104 are bonded, the liquid crystal display panel 101, and a data printed circuit board 112. A plurality of data TCPs 108 for connecting each other, a plurality of gate TCPs 114 connected to the liquid crystal display panel 101, and a data driving integrated circuit separately mounted on the data TCPs 108; 110 and gate driving integrated circuits 116 individually mounted on the gate TCPs 114.

The liquid crystal display panel 101 includes an image display area 121 for displaying images by arranging pixels defined by crossing gate lines 118 and data lines 120 in a matrix form.

Since the thin film transistor array substrate 102 has a larger area than the color filter substrate 104, when the thin film transistor array substrate 102 and the color filter substrate 104 are bonded to each other, the thin film transistor array substrate 102 Some, ie edge regions, are exposed to the outside.

In this case, one side and one side of the thin film transistor array substrate 102 exposed to the outside are called pad regions. As shown in the drawing, a gate TCP 114 and a data TCP 108 are connected to the pad area.

The data driving integrated circuit 110 is mounted on the data TCP 108, and TCP input lines 124 and TCP output lines 125 electrically connected to the data driving integrated circuit 110 are formed.

An input terminal 141 is formed at the end of each TCP input line 124, and an output terminal 142 is formed at the end of each TCP output line 125.

In this case, the TCP input lines 124 of the data TCP 110 are electrically connected to output lines (not shown) of the data printed circuit board 112 through the input terminal 141 and the data TCP 110. TCP output lines 125 are connected to the link lines 123 of the pad area through the output terminal 142.

In particular, the first data TCP 108 is further formed with TCP supply lines 122 electrically connected to the line-on-glass signal lines 126 on the thin film transistor array substrate 102. An input terminal 151 is formed at one end of each TCP supply line 122, and an output terminal 152 is formed at the other end.

The TCP supply line 122 applies gate driving signals of the timing control unit and the power supply unit applied through the data printed circuit board 112 to the line-on-glass signal line 126.

To this end, the TCP supply line 122 is connected to the data printed circuit board 112 through the input terminals 151, and the line-on-glass signal line 126 through the output terminals 152. Is connected to the field.

The output terminal 152 of the TCP supply line 122 is formed on the side of the first data TCP 108 as shown in FIG. The output terminal 142 of the TCP output line 125 is formed below the first data TCP 108.

That is, the output terminals 152 of the TCP supply lines 122 are arranged in the same direction as the direction in which the gate lines 120 are arranged, and the output terminals 142 of the TCP output lines 125 are the data line. 118 are arranged in the same direction as the arranged direction.

In other words, as shown in FIG. 2, the output terminals 152 of the TCP supply lines 122 are arranged along the Y-axis direction, and the output terminals 142 of the TCP output lines 125 are arranged in the X-axis direction. Are arranged along.

Therefore, the interval between the output terminals 142 and 152 in the first data TCP 108 can be made wider than before, and the width of each output terminal 142 and 152 can be widened. Accordingly, poor contact between the pad terminals of each output line 142 and the link line 123 can be reduced.

The data driving integrated circuits 110 convert the image information applied in a digital form into image information in an analog form and apply it to the data lines 118 on the liquid crystal display panel 101.

The gate driving integrated circuit 116 is mounted on the gate TCP 114, and the gate driving integrated circuit 116 is electrically connected to the TCP supply lines 128 and the TCP output lines 130. The gate driving integrated circuit 116 receives various control signals through the TCP supply line 128 and applies output signals to the TCP output line 130. That is, the gate driving integrated circuit 116 sequentially applies a scan signal to the gate lines 120 in response to the input control signals. At this time, the low potential scan signal Vgl is supplied to the gate lines 120 in a period other than the period during which the high potential scan signal Vgh is supplied.

The line-on-glass signal lines 126 are typically provided with a high potential scan signal Vgh, a low potential scan signal Vgl, a common voltage signal Vcom, a ground signal GND, and a power supply voltage signal Vcc. The voltage signals supplied from the power supply unit, the gate start pulse (GSP), the gate shift clock signal (GSC), and the gate enable signal (gate output enable, GOE) The gate control signals supplied are applied. The line-on-glass signal lines 126 are formed in a fine pattern in a limited space such as a pad area.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and it is common in the art that various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

The liquid crystal display according to the present invention as described above has the following effects.

In the present invention, an output terminal formed on the TCP supply line of the first data TCP can be formed on the side of the first data TCP, thereby reducing contact failure between the output terminal and the pad terminal.

Claims (7)

A liquid crystal panel having a plurality of gate lines and a plurality of data lines crossing each other; A printed circuit board mounted with a plurality of driving circuits for supplying various power and control signals; A plurality of Tape Carrier Packages (TCPs) connected to the printed circuit board through a plurality of input terminals and connected to the liquid crystal panel through a plurality of output terminals; The plurality of output terminals formed on the at least one TCP are composed of a plurality of first output terminals and second output terminals. A liquid crystal display device. The method of claim 1, And the direction in which the first output terminals are arranged is the same as the direction in which the data lines are arranged. The method of claim 2, And the first output terminal is connected to the data lines. The method of claim 1,  And the direction in which the second output terminals are arranged is the same as the direction in which the gate lines are arranged. The method of claim 4, wherein And the second output terminals are connected to line-on-glass signal lines that transmit a signal required to drive the gate line. The method of claim 4, wherein And the second output terminal is formed on the outermost TCP among the TCPs. The method of claim 1, And a plurality of data driver integrated circuits mounted on each TCP and configured to drive data lines by receiving power and control signals from the driving circuits.

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