KR20040015909A - A film with a built-in driver IC and liquid crystal display - Google Patents

Abstract

PURPOSE: A liquid crystal display and a film embedded with a driving chip are provided to prevent the driving chip from being damaged by static electricity. CONSTITUTION: A driving chip(902) is embedded in a film. An input part(904a,904b) includes an input line connected to the driving chip and an input connection part formed on one end of the input line. An output part(906a,906b) includes an output line connected to another end of the driving chip and an output connection part formed on one end of the output line. A dummy pattern(982a,982b,982c) includes a static electricity inducing part and a dummy line and a dummy connection part, and is formed on the film. An insulation film is formed on the input line, the output line, and the dummy line. At least a part of one of the film and the insulation film is removed at a part overlapped with the static electricity inducing part of the dummy pattern.

Description

A film with a built-in driver IC and liquid crystal display

The present invention relates to a film and a liquid crystal display device in which the driving chip is embedded.

Compared to the conventional CRT, the liquid crystal display device can be driven by low power and low voltage, and can be lightly used. Therefore, the liquid crystal display device is widely used in notebooks, mobile phones, and computer monitors.

The liquid crystal display device includes a liquid crystal panel, a plurality of driving chips for applying a gate or data driving signal to the liquid crystal panel, and a printed circuit board for controlling the driving chips.

The assembly of the liquid crystal display device is a process of connecting a chip (Chip on film (COF), tape carrier package (TCP)) in which a driving chip is embedded in a liquid crystal panel, and connecting the film to a printed circuit board (PCB). The process takes place. In the film, a driving chip for driving is formed and an input terminal for inputting an external signal and an output terminal for transmitting a signal from the driving chip to an external terminal.

In addition, a plurality of control circuits are formed on the printed circuit board to transmit various control signals to the driving chip.

Static electricity is generated during this assembly process. In general, the generated static electricity flows into the edge of the liquid crystal panel and is then discharged through the printed circuit board. However, the introduced static electricity may be transferred to the driving chip, and then transferred to the printed circuit board to be discharged. When the static electricity moves in this path, the static electricity transferred to the driving chip may damage the logic of the driving chip, which causes the pixel defect of the liquid crystal panel.

Accordingly, an object of the present invention is to provide a film in which a driving chip is embedded to prevent damage of the driving chip due to static electricity.

1A is a schematic layout view of a liquid crystal display according to a first exemplary embodiment of the present invention.

FIG. 1B is a cross-sectional view taken along line Ib-Ib 'of FIG. 1A.

2 is a cross-sectional view of a portion of a liquid crystal display according to a second exemplary embodiment of the present invention.

3A is a schematic layout view of a liquid crystal display according to a third exemplary embodiment of the present invention.

FIG. 3B is a cross-sectional view taken along line IIIb-IIIb 'of FIG. 3A.

※ Explanation of symbols on main parts of drawing ※

900 thin film 902 driving chip

904a, 904b: Input section 905a, 905b, 905c: Auxiliary signal line

906a, 906b: output 908: insulating film

910: conductor projection

Dummy Patterns: 981a, 981b, 981c, 982a, 982b, 982c

In order to achieve the above object, the film in which the driving chip according to the present invention is embedded includes a driving chip formed in the film and a predetermined region of the film, an input wiring formed to be connected to one end of the driving chip in the predetermined region of the film, An input unit including an input connection unit formed at one end of the input wire, an output wire formed to be connected to the other end of the driving chip in a predetermined region of the film, an output unit including an output connection unit formed at one end of the output wire, and a film A dummy pattern including an electrostatic induction part, a dummy wire, and a dummy connection part, an insulating film formed on an input wire, an output wire, and a dummy wire, wherein at least one of the film and the insulating film is an electrostatic induction part of the dummy pattern; At least a part is removed from the overlapping part.

Here, it may further include an auxiliary signal line which is not connected to the driving chip and transmits an external signal to an external terminal, and may further include a conductor protrusion formed on one surface of the electrostatic induction part.

In addition, the liquid crystal display device according to the present invention for achieving another object of the present invention is connected to a liquid crystal panel, a predetermined region of the liquid crystal panel and connected to a film, a film in which a driving chip for driving the liquid crystal panel is built, A liquid crystal display device comprising a printed circuit board on which an element for controlling is formed, wherein the first and second dummy connection parts and the first dummy connection part and the second dummy connection part are formed in a predetermined region of the film. The dummy pattern includes a metal pattern including a static induction part formed on the liquid crystal panel, wherein the first dummy connection part is joined to a part of the first dummy connection part and is formed of a metal, and is not bonded to the first dummy connection part. . Herein, it is preferable that a conductor protrusion is further formed on the electrostatic induction part.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

It will now be described in detail with reference to the drawings with reference to embodiments of the present invention.

[First Embodiment]

FIG. 1A is a schematic layout view of a liquid crystal display according to an exemplary embodiment of the present invention, and FIG. 1B is a cross-sectional view taken along the line Ib-Ib 'of FIG. 1A.

As illustrated, the liquid crystal panel 300 and the printed circuit board 550 on which various control circuits are formed are connected by a film in which a driving chip is embedded.

The liquid crystal panel 300 is formed by injecting liquid crystal between the thin film transistor substrate and the color filter substrate. The thin film transistor substrate includes a scan signal line or a gate line for transmitting a scan signal and an image signal line or data line for transmitting an image signal, a thin film transistor connected to the gate line and a data line, and a pixel connected to the thin film transistor. A gate insulating layer covering and insulating an electrode, a gate wiring, and an interlayer insulating layer covering and insulating a thin film transistor and a data wiring.

In addition, a black matrix is formed on the color filter substrate to prevent light leakage on the insulating substrate. In addition, red, green, and blue color filters are formed in a region defined by a black matrix, and a reference electrode made of a transparent conductive material such as indium tin oxide (ITO) or indiumzinc oxide (IZO) is formed on the color filter. .

In the film in which the driving chip is embedded, the driving chip 902 is formed on the thin film 900 formed of resin such as polyimide. The driving chip 902 is wrapped in a resin and protected from external magnetic poles.

On the thin film 900, the input units 904a and 904b for transmitting the control signal transmitted from the printed circuit board 550 to the driving chip 902, and the signal passing through the driving chip 902 are transferred to the liquid crystal panel 300. Outputs 906a and 906b are provided for delivery to the device.

The input sections 904a and 904b and the output sections 906a and 906b are formed at one end of each of the input wiring 904b and the output wiring 906b and the input and output wirings 904b and 906b connected to the driving chip 902. And an input connection 904a and an output connection 906a, which are pad portions for connecting with another substrate.

In addition, auxiliary signal lines 905a, 905b, and 905c may be further formed. The auxiliary signal lines 905a, 905b, and 905c have an auxiliary input unit 905a, an auxiliary line 905b, and an auxiliary output unit 905c. The auxiliary line 905b connects the auxiliary input unit 905a and the auxiliary output unit 905c and directly through the auxiliary output unit 905c without transmitting an external signal input to the auxiliary input unit 905a to the driving chip 902. Transfer to the liquid crystal panel 300.

The input units 904a and 904b, the output units 906a and 906b, and the auxiliary signal lines 905a, 905b, and 905c are formed of a metal having high electrical conductivity and bonding property with the thin film 900. For example, it is preferable to use metals, such as copper.

First dummy patterns 981a, 981b, and 981c and second dummy patterns 982a, 982b and 982c are formed adjacent to the output and input connections 904a and 906a. The first and second dummy patterns are formed of the same material as the input part and the output part, and the first and second electrostatic induction parts 981c and 982c capable of inducing static electricity and the first and second static patterns for discharging the introduced static electricity to the outside. The second dummy wirings 981b and 982b and the first and second dummy connecting parts 981a and 982a are formed at one ends of the first and second dummy wirings and are connected to the printed circuit board 550. The first and second dummy wires 981b and 982b and the first and second dummy connection parts 981a and 982a are formed on the thin film 900, but the first and second electrostatic induction parts 981c and 982c are thin films. It is formed outside the film 900 and is exposed to the outside air. As such, exposing the first and second electrostatic induction parts 981c and 982c to the outside air is intended to facilitate the inflow of static electricity.

Hereinafter, a side on which the thin film 900 of the first and second dummy patterns 981a, 981b, 981c, 982a, 982b, and 982c is formed is called a first surface, and an opposite side is called a second surface. Input and output wirings 904a and 906a except for the second surfaces of the first and second electrostatic induction parts 981c and 982c and the connecting portions 904a and 905a of the respective wirings, and the first and second dummy patterns 981b and 982b, An insulating film (SR) 908 is formed directly above 981c and 982c to protect the lower layer and to insulate it from adjacent conductors.

In addition, a conductor protrusion 910 is formed on the first surfaces of the first and second electrostatic induction parts 981a and 982a to accelerate electrostatic induction. It is based on the principle that static electricity is a conductive material and flows into a pointed object, and it can be formed by patterning a metal or by soldering.

Second Embodiment

Fig. 2 is a second embodiment according to the present invention, which is a sectional view at the same position as the first embodiment.

As shown, in the second embodiment, unlike the first embodiment, the thin film 900 is formed on the electrostatic induction part 982a. Therefore, the conductor protrusion 910 is formed on the second surface disposed between the insulating film 908 and the pad portion 97 of the liquid crystal panel.

Third Embodiment

3A is a schematic layout view of a liquid crystal display according to the present invention, and FIG. 3B is a cross-sectional view taken along line IIIb-IIIb 'of FIG. 3A.

As illustrated, the first and second dummy patterns include first dummy connectors 983a and 984a connected to the printed circuit board 550, second dummy connectors 983c and 984c connected to the liquid crystal panel 550, Dummy wirings 984b and 984b for connecting the first dummy connection parts 983a and 984a to the second dummy connection parts 983c and 984c.

In addition, the dummy pad portion of the liquid crystal panel 300 to be bonded to the second dummy connectors 983c and 984c is larger than the second dummy connectors 943c and 984c. Accordingly, the first and second electrostatic induction parts 971 and 972 are areas of the dummy pad except for the area 97 that is joined to the second dummy connection parts 983c and 984c. Conductor protrusions 910 are formed on the first and second electrostatic induction parts 971 and 972 to accelerate electrostatic induction.

When assembling a liquid crystal display using a liquid crystal panel in which an electrostatic induction part is formed or a film in which a driving chip is embedded, static electricity first flows into the electrostatic induction parts 981c, 982c, 971, and 972. Thereafter, the introduced static electricity is moved to the printed circuit board 550 along the dummy wirings 981b, 982b, 983b, and 984b, and then discharged through ground wirings (not shown) formed on the printed circuit board.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

As described above, if a dummy pattern including an electrostatic induction part for inducing static electricity according to the present invention is further formed, it can be completely discharged while preventing static electricity from being transferred to the driving chip. Therefore, the failure rate of the driving chip due to static electricity can be reduced.

Claims (5)

film, A driving chip formed in a predetermined region of the film, An input unit including an input wire formed to be connected to one end of the driving chip in a predetermined region of the film, and an input connection part formed at one end of the input wire; An output part including an output line formed at a predetermined region of the film to be connected to the other end of the driving chip, and an output connection part formed at one end of the output wire; A dummy pattern formed in a predetermined region of the film and including a static electricity induction part, a dummy wire, and a dummy connection part; An insulating film formed on the input wiring, output wiring, and dummy wiring; At least one of the film and the insulating film includes a driving chip in which at least a portion of the film and the insulating layer is overlapped with the electrostatic induction part of the dummy pattern. In claim 1, And a driving chip which is not connected to the driving chip and further includes an auxiliary signal line for transmitting the external signal to the external terminal. In claim 1, A film in which the driving chip further includes a conductor protrusion formed on one surface of the electrostatic induction part. Liquid crystal panel, A film connected to a predetermined region of the liquid crystal panel and including a driving chip for driving the liquid crystal panel; A liquid crystal display device comprising a printed circuit board connected to the film and having an element for controlling the driving chip. A dummy pattern including first and second dummy connection parts formed in a predetermined region of the film, dummy wires connecting the first dummy connection part and the second dummy connection part; A liquid crystal display device including a metal pattern formed on the liquid crystal panel, the portion of which is bonded to the first dummy connection portion and formed of metal, and the portion that is not bonded to the first dummy connection portion includes a metal pattern including an electrostatic induction portion exposed to the outside air. . In claim 4, And a conductive protrusion formed on the electrostatic induction part.