KR19980022931A - Driving chip electrode connection structure of liquid crystal display device - Google Patents

Abstract

Disclosed is a driving chip electrode connection structure of a liquid crystal display device. The driving chip electrode connection structure of the disclosed liquid crystal display device is characterized in that the electrode member for connecting the ITO electrode formed on the ITO glass and the driving chip has a bridge-type structure in which a groove portion is formed so that the center portion of the bottom surface thereof is recessed. According to the characteristic of the structure, the adhesive force with the ITO electrode is increased, and the phenomenon that the driving chip is pushed in the left and right directions after being connected can be prevented, so that short generation can be effectively suppressed.

Description

Driving chip electrode connection structure of liquid crystal display device

The present invention relates to an electrode connection structure of an ITO electrode and a driving chip provided in a glass of a liquid crystal display device.

Liquid crystal displays (hereinafter, LCDs), which have recently been used as flat-panel imaging devices for displaying necessary information such as letters and figures, are less portable and smaller in size than display devices using cathode ray tubes. It has advantages such as low voltage driving type. These LCDs are widely used from small size, such as display of electronic calculator, to large size of notebook computer, and the range of application is expected to expand so that large amount of information can be displayed on one screen as the display screen becomes larger in the future. do.

In general, LCDs arrange glass with ITO electrodes facing each other, inject liquid crystal between a front plate and a back plate on which an ITO electrode on an XY matrix is orthogonal to each other, and seal the liquid crystal, and connect a driving chip to one side of the ITO electrode to drive the LCD. Done.

Meanwhile, as an example of the driving chip electrode connection structure of the LCD, a cross section of the driving chip electrode connection structure of a conventional chip on glass (COG) type LCD is schematically illustrated in FIG. 1.

Referring to FIG. 1, a driving chip electrode connecting structure of a conventional LCD is provided to correspond to one of a plurality of ITO electrodes 11 formed on a glass 10 forming a back plate (or a front plate) of an LCD. The electrode member 21 and the ITO electrode 11 are supported by the driving chip 20 and the anisotropic conductive film 30 is interposed between the glass 10 and the driving chip 20. It has a structure bonded to it.

In the above structure, the electrode member 21 serves as a bumper to compress the anisotropic conductive film 30 to increase the electrical conductivity between the driving chip 20 and the ITO electrode 11.

However, the electrode member 21 is formed in a plane such that the entire bottom surface thereof may come into contact with the entire upper surface of the ITO electrode 11, and thus, a phenomenon in which the electrode member 21 is pushed in the left and right directions after the driving chip is connected often occurs. . This phenomenon has a problem in that short is generated especially when a driving chip having a fine pitch is connected.

Accordingly, an object of the present invention is to improve the problems of the conventional LCD driving chip electrode connection structure as described above, and an object of the present invention is to provide an LCD driving chip electrode connection structure having a high short prevention effect. will be.

1 is a schematic cross-sectional structural view showing a driving chip electrode connection structure of a conventional liquid crystal display device;

2 is a schematic cross-sectional structural view showing a driving chip electrode connection structure of a liquid crystal display according to the present invention.

Explanation of symbols for the main parts of the drawings

10, 100..ITO glass 11, 110..ITO electrode

20, 200. Driving chip 21, 210. Electrode member

211. Grooves 30, 300. Anisotropic conductive film

In order to achieve the above object, the driving chip electrode connection structure of the liquid crystal display according to the present invention includes a front plate and a rear plate, which are provided in parallel with each other and have an ITO electrode on an XY matrix orthogonal to each other, and the back plate. A driving chip electrode connecting structure of a liquid crystal display device in which a driving chip is supported by an electrode member provided to correspond to each one of the ITO electrodes protruding to one side of the back plate, and is electrically connected to the ITO electrode of the back plate. It is characterized in that it has a brittle structure formed with a groove so that the central portion of the surface in contact with the ITO electrode.

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

FIG. 2 is a schematic cross-sectional structural view showing an LCD driving chip electrode connection structure according to the present invention. Referring to this, the LCD driving chip electrode connection structure according to the present invention is a glass (100) forming a back plate (or a front plate) of an LCD. The driving chip 200 is supported by the electrode member 210 provided to correspond to each one of the plurality of ITO electrodes 110 formed on the upper surface of the ITO electrode 110, and the anisotropic conductive film (B) between the glass 100 and the driving chip 200 is provided. It has a structure in which the electrode member 210 and the ITO electrode 110 are bonded to each other through 300.

This structure has the same structure as the whole except for the electrode member 21 in the conventional LCD driving chip electrode connection structure described by FIG. 1, and the components that characterize the present invention are the electrode members. As a reference numeral 210, a bridge-shaped structure in which the groove 211 is formed so that the central portion of the surface in contact with the ITO electrode 110 is recessed.

According to the characteristic of this structure, the adhesive force with the ITO electrode 110 becomes high, it can prevent the phenomenon which pushes to the left-right direction after a drive chip is connected, and can suppress a short generation.

As described above, in the LCD driving chip electrode connection structure according to the present invention, the electrode member for connecting the ITO electrode and the driving chip is formed to have a bridge-shaped structure by forming a groove portion so that the center portion of the bottom surface thereof is recessed. It is possible to suppress the occurrence of a short due to the phenomenon that the position is changed after the driving chip is connected by increasing the adhesive force with the ITO electrode.

Claims (1)

The driving chip is supported by a front plate and a back plate, which are installed in parallel with each other and on which an ITO electrode on an XY matrix is orthogonal to each other, and an electrode member provided to correspond to one ITO electrode protruding to one side of the back plate. In the drive chip electrode connection structure of the liquid crystal display device which is connected to the ITO electrode of the back plate so as to conduct electricity, The electrode member has a bridging structure in which a groove is formed such that a central portion of a surface contacting the ITO electrode is sunk, and has a brittle structure.