KR20080037870A - Tape carrier package for liquid crystal display device - Google Patents

Abstract

A TCP(Tape Carrier Package) for an LCD(Liquid Crystal Display) is provided to configure first and second sub electrodes on input and output pads, thereby achieving smooth flow of an electric signal between a driving circuit and an LC panel. An input pad(139) is disposed in one side of an insulating film(113), and first sub electrodes(139a,139b) are configured on the input pad. The input pad is divided into the plural first sub electrodes. An output pad(141) is disposed in the other side of the insulating film. Second sub electrodes(141a,141b) are configured on the output pad. The output pad is divided into the plural second sub electrodes. An IC(Integrated Circuit)(107,111) is configured between the input and output pads.

Description

Tape carrier package for liquid crystal display device

1 is a view schematically showing a liquid crystal panel of a general TAB method.

FIG. 2 is a schematic enlarged view of a portion A of FIG. 1; FIG.

FIG. 3 is a view schematically illustrating a pad configured on a general TCP and a pad configured on a printed circuit board and a liquid crystal panel. FIG.

4 is a view schematically showing a TAB type liquid crystal panel according to an embodiment of the present invention.

FIG. 5 is a view schematically showing a pad formed on a TCP and a pad formed on a printed circuit board and a liquid crystal panel; FIG.

6 is a schematic cross-sectional view of the input and output pads.

<Description of the symbols for the main parts of the drawings>

107, 111: integrated circuit 113: insulating film

139: input pads 139a, 139b: first auxiliary electrode

141: output pads 141a, 141b: second auxiliary electrode

143a: pad formed on a printed circuit board

143b: Gate Pad and Data Pad Configured on Liquid Crystal Panel

The present invention relates to a liquid crystal display device, and more particularly, to a printed circuit board on which a liquid crystal panel and a driving circuit thereof are mounted, and input and output pads of a tape carrier package (TCP) for electrically connecting them.

In general, a liquid crystal display device includes an array substrate, a color filter substrate facing the array substrate, and a liquid crystal panel in which liquid crystal is filled between both substrates.

The array substrate is formed such that a plurality of data lines and a gate line cross each other, and a thin film transistor as a switching element is formed in each cross region.

Such an integrated circuit (D-IC) mounting method for driving a liquid crystal display device is classified into a tape automated bonding (TAB) process and a chip on glass (COG) process. These processes are rapidly developing with increasing use of liquid crystal panels.

The COG method has a simple structure in that the driving circuit is directly mounted on a substrate. However, as the liquid crystal panel becomes higher resolution, it is not easy to mount the driving circuit on the substrate.

On the other hand, the TAB method is a method in which the driving circuit is directly mounted on a tape carrier package (TCP), and the effective area of the panel can be widened and the process is relatively simple. .

The TAB process is formed by bonding an electrode of a driving circuit and a substrate of a liquid crystal panel through an inner lead bonding (ILB) process and an outer lead bonding (OLB) process.

In this case, the ILB process is a process of connecting the pads formed on the TCP and the electrodes of the driving circuit with bumps, and the OLB process is a process of adhering the pads of TCP bonded to the electrodes through the ILB process to the liquid crystal panel.

FIG. 1 is a diagram schematically showing a liquid crystal panel of a general TAB type, and FIG. 2 is a diagram schematically illustrating an enlarged view of A of FIG. 1.

As shown in the drawing, the general liquid crystal panel 10 is bonded to the array substrate 1 and the color filter substrate 3 at predetermined intervals, and a liquid crystal (not shown) is injected between the two substrates.

One surface of the color filter substrate 3 includes a black matrix (not shown) and a color filter (not shown), and one surface of the array substrate 1 vertically crosses each other to define a pixel area P. The wiring DL and the gate wiring GL are configured, and a thin film transistor (not shown) is formed at the intersection of the two wirings.

Data pads (not shown) extending from the data line DL and connected to the data link DLK and gate lines GL in the outer region of the array substrate 1 positioned at the outer portion of the pixel area P. Gate pads (not shown) extending from the first side to be connected to the gate link GLK.

In addition, along the edge thereof, a plurality of TCPs 9 are connected to one or more printed circuit boards 5 on which the gate driver circuit 11 and the data driver circuit 7 are mounted.

On the TCP 9, a pad unit including an integrated circuit (D-IC: 7, 11) and a plurality of input and output pads 39 and 41 is configured, and each of the input and output pads 39 and 41 is configured as described above. The gate and the data pads (not shown) formed on the liquid crystal panel 10 are connected one-to-one with the pads (not shown) of the pad portion formed on the printed circuit board 5.

That is, the control signal input from the printed circuit board 5 is converted into a driving signal through the integrated circuits 7 and 11 configured on the TCP 9, and is supplied to the liquid crystal panel 10.

FIG. 3 is a view schematically illustrating a pad formed on a general TCP and a pad formed on a printed circuit board and a liquid crystal panel.

As illustrated, a plurality of input and output pads 39 and 41 are formed in one direction on the insulating film 13, and the input and output pads 39 and 41 are formed at the center of the input and output pads 39 and 41. Integrated circuits 7 and 11 connected to the 41 are mounted to form one TCP.

In addition, pads 43a or gates and data pads 43b are formed on the printed circuit board and the liquid crystal panel to correspond to the plurality of input and output pads 39 and 41 formed on the TCP.

Therefore, the input pad 39 configured on the TCP is connected to the pads 43a of the printed circuit board to receive a signal from the printed circuit board, and the output pad 41 is connected to the gate and data pad ( 43b) to make direct contact with them.

However, there are frequent problems with the pads 39 and 41, such as the driving signal applied through TCP not being applied to the gate and data pad 43b on the liquid crystal panel. As shown in FIG. This is because a plurality of pads 39 and 41 constituted by the process failure cause problems such as crushing or tearing.

The present invention has been made to solve the above problems, and an object of the present invention is to allow a driving signal to be smoothly applied into the liquid crystal panel through the TCP without a problem due to a failure of a pad configured on the TCP.

In order to achieve the object as described above, the present invention is an insulating film; An input pad positioned on one side of the insulating film, a first auxiliary electrode formed on the input pad, and divided into a plurality; An output pad positioned on the other side of the insulating film, a second auxiliary electrode formed on the output pad and divided into a plurality of parts; The present invention provides a tape carrier package for a liquid crystal display device including an integrated circuit configured between the input and output pads.

The first auxiliary electrode may be arranged in one direction on the input pad, and the second auxiliary electrode may be arranged in one direction on the output pad.

The first auxiliary electrode and the second auxiliary electrode may be configured in various shapes such as a square or a circle, and the first auxiliary electrode and the second auxiliary electrode do not deviate from the input and output pads. It is characterized by.

The present invention also provides a tape carrier package including an input pad having a first auxiliary electrode stacked thereon and an output pad having a second auxiliary electrode stacked thereon; A printed circuit board on which a driving circuit of the liquid crystal panel is mounted, and a pad corresponding to the input pad is formed; And a liquid crystal panel including a gate and a data pad corresponding to the output pad, wherein the first and second auxiliary electrodes are divided into a plurality and provided on the input and output pads, respectively.

The pad configured on the printed circuit board may be in contact with the input pad and the first auxiliary electrode at the same time, and the gate pad and the data pad may be in contact with the output pad and the second auxiliary electrode at the same time. do.

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

4 is a diagram schematically illustrating a TAB type liquid crystal panel according to an exemplary embodiment of the present invention.

As shown, a data pad (not shown) extending from the data wiring DL and connected to the data link DLK in a region outside the pixel region P of the array substrate 101 spaced apart from the color filter substrate 103. And gate pads (not shown) extending from the gate wiring GL and connected to the gate link GLK.

In addition, along the edge thereof, a plurality of TCPs 109 connected to one or more printed circuit boards 105 on which the gate driver circuit 111 and the data driver circuit 107 are mounted are configured.

The TCP 109 includes a pad unit including integrated circuits 107 and 111 and a plurality of input and output pads 139 and 141, and each of the input and output pads 139 and 141 includes the liquid crystal panel (LCD). The gate and data pads (not shown) formed on the 110 and the pads (not shown) formed on the printed circuit board 105 are connected one-to-one.

That is, the control signal input from the printed circuit board 105 is converted into a driving signal through the integrated circuits 107 and 111 configured on the TCP 109 and supplied to the liquid crystal panel 110.

In this case, an input pad 139 configured on the TCP 109 and pads (not shown) configured on the printed circuit board 105, an output pad 141 configured on the TCP 109, and the Gates and data pads (not shown) formed on the liquid crystal panel 110 are configured at equal intervals to correspond one-to-one to each other.

The above-described TAB type liquid crystal panel 110 is similar to a general TAB type liquid crystal panel (10 in FIG. 1), but the present invention particularly includes a plurality of input and output pads 139 and 141 formed on the TCP 109. The first and second auxiliary electrodes 139a and 139b and the second auxiliary electrodes 141a and 141b are further configured to form the plurality of input and output pads 139 and 141. This will be described in detail with reference to FIG. 5.

FIG. 5 is a diagram schematically illustrating a pad configured on a TCP, a pad formed on a printed circuit board, and a liquid crystal panel.

As shown, a plurality of input pads 139 are formed side by side on the insulating film 113 to maintain a minute uniform interval, respectively, the input pads 139 in the center of the insulating film 113 The integrated circuits 107 and 111 are mounted. In addition, the integrated circuits 107 and 111 may be connected to the output pads 141 formed side by side while maintaining minute uniform intervals in one direction to form one TCP.

In addition, the first auxiliary electrodes 139a and 139b are configured on the input pad 139, and the second auxiliary electrodes 141a and 141b are configured on the output pad 141. 139b and the second auxiliary electrodes 141a and 141b are divided into a plurality of forms, and are arranged in one direction on the input and output pads 139 and 141. Accordingly, the input and output pads 139 and 141 may include a plurality of layers including the first auxiliary electrodes 139a and 139b and the second auxiliary electrodes 141a and 141b as illustrated in FIG. 6.

The first auxiliary electrodes 139a and 139b and the second auxiliary electrodes 141a and 141b may be formed of any conductors through which electrical communication flows smoothly, and the first auxiliary electrodes 139a and 139b and the second auxiliary electrodes 139a and 139b may be formed. Although the shape of the auxiliary electrodes 141a and 141b is illustrated as a square quadrangular shape on the drawing, the auxiliary electrodes 141a and 141b may be formed without any limitation in a shape such as a circular shape without departing from the input and output pads 139 and 141.

In this case, the input and output pads 139 and 141 configured on the TCP and the gate and data pad 143b formed on the liquid crystal panel corresponding to the ACF or the pads 143a formed on the printed circuit board are the same as before. In this configuration, each of the pads 143a formed on the printed circuit board is attached to the first auxiliary electrodes 139a and 139b formed on the input pad 139 at the same time. The gate and the data pad 143b are attached to the second auxiliary electrodes 141a and 141b formed on the output pad 141 respectively.

Accordingly, the input pad 139 including the first auxiliary electrodes 139a and 139b is connected to a printed circuit board to receive a signal from the printed circuit board, and includes the second auxiliary electrodes 141a and 141b. The output pad 141 is in direct contact with the gate and the data pad 143b to apply a signal thereto.

In this case, the first auxiliary electrodes 139a and 139b and the second auxiliary electrodes 141a and 141b form the input and output pads 139 and 141 on the insulating film 113 and then the input and output pads 139. By the auxiliary means of the input and output pads (139, 141) on the 141, even if the input and output pads (139, 141) are torn and torn due to a process failure A signal may flow smoothly from the input pad 139 to the output pad 141 through the auxiliary electrodes 139a and 139b and the second auxiliary electrodes 141a and 141b.

As described above, the first and second auxiliary electrodes 139a and 139b and the second and second auxiliary electrodes 141a and 141b are further configured on the input and output pads 139 and 141 configured on TCP. Even if the tearing and tearing of the 139 and 141 occur, the driving circuit is provided through the first auxiliary electrodes 139a and 139b and the second auxiliary electrodes 141a and 141b formed on the input and output pads 139 and 141. The electrical signal between the furnace and the liquid crystal panel can be smoothly flown.

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

As described above, by further configuring the first auxiliary electrode and the second auxiliary electrode on the input and output pads configured on TCP according to the present invention, even if the input and output pads are torn and torn, The first and second auxiliary electrodes formed on the input and output pads have an effect of smoothly flowing an electrical signal between the driving circuit and the liquid crystal panel.

Claims (8)

Insulating film; An input pad positioned on one side of the insulating film, a first auxiliary electrode formed on the input pad, and divided into a plurality; An output pad positioned on the other side of the insulating film, a second auxiliary electrode formed on the output pad and divided into a plurality of parts; An integrated circuit configured between the input and output pads Tape carrier package for a liquid crystal display device comprising a. The method of claim 1, And the first auxiliary electrode is arranged in one direction on the input pad. The method of claim 1, And the second auxiliary electrode is arranged in one direction on the output pad. The method of claim 1, The first auxiliary electrode and the second auxiliary electrode is a tape carrier package for a liquid crystal display device, characterized in that configured in various forms such as square or round. The method of claim 4, wherein And the first auxiliary electrode and the second auxiliary electrode do not leave the input and output pads. A tape carrier package comprising an input pad having a first auxiliary electrode stacked thereon and an output pad having a second auxiliary electrode stacked thereon; A printed circuit board on which a driving circuit of the liquid crystal panel is mounted, and a pad corresponding to the input pad is formed; Liquid crystal panel comprising a gate and a data pad corresponding to the output pad Wherein the first and second auxiliary electrodes are divided into a plurality and configured on the input and output pads, respectively. The method of claim 6, And a pad formed on the printed circuit board is in contact with the input pad and the first auxiliary electrode at the same time. The method of claim 6, And the gate pad and the data pad are in contact with the output pad and the second auxiliary electrode simultaneously.

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