JP2003167234A - Connection structure of chip for driving liquid crystal display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the connection structure of a chip for driving a liquid crystal display panel which can cope with a design change quickly and easily and also which can reduce the manufacturing cost even when the design change such as the changing of the laying of wirings and the changing of the pitch of electrodes is performed. <P>SOLUTION: In this connection structure, a wiring pattern is formed on the transparent middle substrate 4 made of glass or the like and a driving chip 5 which is to be connected to the wiring pattern is mounted on the middle substrate 4 and the wiring pattern of the middle substrate 4 are electrically connected to electrode terminals 3 of a liquid crystal display panel 1 with a flat cable 7 for connecting the panel. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive chip connection structure for a liquid crystal display panel, and more particularly to a liquid crystal display panel for connecting a drive chip made of a semiconductor to an electrode terminal portion of a transparent substrate of the liquid crystal display panel. The present invention relates to a drive chip connection structure.

[0002]

2. Description of the Related Art Generally, a liquid crystal display panel for displaying information such as specific figures or characters by selectively applying an electric field to a predetermined portion of two transparent substrates filled with liquid crystal in the middle is used as a computer or a computer. It is often used as a display device for mobile phones and the like.

In such a liquid crystal display panel, a pair of transparent substrates made of glass or the like are formed with transparent electrodes made of indium tin oxide (hereinafter referred to as ITO) or the like on their surfaces facing each other. It is configured by sealing a liquid crystal in between.

Conventionally, in such a liquid crystal display panel, at least one transparent substrate of a pair of transparent substrates is formed larger than the other transparent substrate, and a transparent portion is formed on a protruding portion of the large formed transparent substrate. The electrode terminal portion of the electrode is pulled out.

A driving chip made of a semiconductor element such as an FET or an IC is connected to the electrode terminal portion of such a transparent substrate. As a method of connecting the driving chip, a TCP has been conventionally used. (Tape carri
A connection method called "er package" is often used.

FIG. 3 and FIG. 4 show the connection structure of a general driving chip by such a TCP. For example, a tape member 20 made of polyimide tape or the like is provided. A panel connection terminal 24 connected to an electrode terminal portion 23 formed on one transparent substrate 22 of the liquid crystal display panel 21 is formed at one end edge. An external circuit connection terminal 25 connected to an external circuit (not shown) is formed on the other end of the tape member 20. The tape member 20 has the panel connection terminal 24 and the external circuit connection terminal 25. A wiring pattern (not shown) connected to the terminal 25 with a predetermined pattern is formed. A driving chip 26 electrically connected to the wiring pattern is mounted on the central portion of the tape member 20.

[0007]

However, in the above-described conventional driving chip connection structure for a liquid crystal display panel, for example, when the external circuit is arranged on the back surface side of the liquid crystal display panel 21, the tape member 20 is used. Although it is necessary to bend, in such a case, a slit 27 for bending is formed in advance at the bending position of the tape member 20, and the tape member 20 is bent at this slit 27 portion to route the wiring. It is like this.

However, in such a case, for example,
When a design change such as disposing a backlight unit on the back surface side of the liquid crystal display panel 21 is made, the bending position of the tape member 20 may be changed. In this case, the position of the slit 27 and the wiring are changed. Since it is necessary to change the design of the pattern and the like, it is extremely troublesome, and there is a problem that the manufacturing cost accompanying the design change increases.

Further, for example, when the electrode pitch is changed or the number of electrode terminals is changed in accordance with the high definition of the electrode terminal portion 23, it is necessary to similarly change the design. There is a problem that the change cannot be dealt with promptly and the manufacturing cost is increased.

The present invention has been made in view of the above points, and it is possible to quickly and easily cope with a case where a design change such as wiring arrangement or electrode pitch change is made. Moreover, it is an object of the present invention to provide a drive chip connection structure for a liquid crystal display panel, which can reduce the manufacturing cost.

[0011]

In order to achieve the above-mentioned object, a driving chip connection structure for a liquid crystal display panel according to a first aspect of the present invention is characterized in that an electrode terminal portion of the liquid crystal display panel and a driving chip are electrically connected. In a driving chip connection structure of a liquid crystal display panel for electrically connecting, a wiring pattern is formed on a transparent intermediate substrate, and a driving chip connected to the wiring pattern is mounted on the intermediate substrate, The wiring pattern and the electrode terminal portion of the liquid crystal display panel are electrically connected via a flat cable for panel connection.

According to the invention described in claim 1, the intermediate substrate on which the driving chip is mounted and the electrode terminal portion of the liquid crystal display panel are connected to each other through the flat cable for panel connection. Since these flat cables for panel connection have flexibility, the flat cable for panel connection can be bent at any position, and the wiring can be extremely easily routed. In addition, even if the design is changed and the bending position or the routing position of the wiring is changed, simply changing the length dimension of the flat cable for panel connection does not require a large design change and can be done quickly and easily. Can respond and, in addition,
Even if the pitch of the electrode terminal portion changes or the number of electrode terminals changes, it is possible to quickly and easily cope with the change by changing the wiring pitch or the number of wirings of the flat cable for panel connection.

The invention described in claim 2 is the same as claim 1
In the above, the wiring pattern of the intermediate substrate and the external circuit are electrically connected via a flat cable for external circuit connection.

According to the second aspect of the present invention, the intermediate substrate on which the driving chip is mounted and the external circuit are connected via the flexible flat cable for external circuit connection. Therefore, the flat cable for external circuit connection can be bent at any position, and the wiring can be extremely easily routed. Even if the design changes such as the bending position of the wiring or the routing position or the pitch of the electrode terminals are changed, the length of the flat cable for external circuit connection, the wiring pitch, and the number of wirings. By changing, it is possible to respond quickly and easily without requiring a major design change.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS.

1 and 2 show an embodiment of a driving chip connection structure of a liquid crystal display panel according to the present invention. The liquid crystal display panel 1 is made of glass or the like and is arranged to face each other. The transparent substrate 2 has a pair of transparent substrates 2 and 2.
A transparent electrode (not shown) made of O or the like is formed.
The liquid crystal display panel 1 is configured by sealing liquid crystal (not shown) between the transparent substrates 2.

In such a liquid crystal display panel 1,
One transparent substrate 2 of the liquid crystal display panel 1 is formed to be larger than the other transparent substrate 2, and an electrode drawn from a transparent electrode of the liquid crystal display unit is provided on a protruding portion of the one transparent substrate 2. The terminal portion 3 is formed.

Further, in this embodiment, a transparent intermediate substrate 4 made of glass is provided, and a wiring pattern (not shown) having a predetermined pattern is formed on the intermediate substrate 4. A driving chip 5 made of a semiconductor element such as an FET or an IC, which is electrically connected to the wiring pattern, is mounted on the center portion of the intermediate substrate 4.

Further, in this embodiment, a panel cable terminal portion 6 connected to the wiring pattern is formed at one end edge of the intermediate substrate 4, and the panel cable terminal portion 6 is One end of a flat cable 7 for panel connection whose other end is connected to the electrode terminal part 3 of the liquid crystal display panel 1 is electrically connected. Further, an external circuit cable terminal portion 8 connected to the wiring pattern is formed on the other end edge of the intermediate substrate 4, and the other end portion of the external circuit cable terminal portion 8 is connected to an external circuit. One end of the external circuit connecting flat cable 9 connected to is electrically connected.

Next, the operation of this embodiment will be described.

In this embodiment, the flat cable 7 for panel connection is connected to the electrode terminal portion 3 of the liquid crystal display panel 1, and the flat cable 9 for external circuit connection is connected to an external circuit. Thus, the driving terminal 5 is electrically connected to the electrode terminal portion 3 and the external circuit of the liquid crystal display panel 1.

In this case, in the present embodiment, the intermediate substrate 4 on which the driving chip 5 is mounted, the electrode terminal portion 3 of the liquid crystal display panel 1 and the external circuit are connected to the flat cable 7 for connecting the panel and the external circuit. The flat cables 9 for connection are connected through the flat cable 9 for connection, and since the flat cable 7 for panel connection and the flat cable 9 for external circuit connection have flexibility, for example, the intermediate substrate 4 is connected to the liquid crystal display panel. Even when it is arranged on the back surface side of No. 1, it can be bent at an arbitrary position, and the wiring can be laid out very easily.

Further, for example, even when a design change such as arranging a backlight unit is made and a bending position or a routing position of wiring is changed, the flat cable 7 for panel connection or the flat cable 9 for external circuit connection is changed. By simply changing the length dimension, it is possible to respond quickly and easily without requiring a large design change. Furthermore, even if the pitch of the electrode terminal portions 3 changes or the number of electrode terminals changes, by changing the wiring pitch and the number of wiring of the flat cable 7 for panel connection and the flat cable 9 for external circuit connection, It can be dealt with easily.

Therefore, in the present embodiment, the intermediate substrate 4 on which the driving chip 5 is mounted, the electrode terminal portion 3 of the liquid crystal display panel 1 and the external circuit are connected to the flat cable 7 for panel connection and the external circuit connection. Since the connection is made via the flat cable 9, it is possible to quickly and easily deal with design changes such as wiring arrangement and the pitch of the electrode terminal portions 3, and the cost required for the design change. Can be significantly reduced.

Further, since the intermediate substrate on which the driving chip 5 is mounted is transparent, an ultraviolet curable resin can be used as a connecting material for connecting the driving chip 5 and the wiring pattern, which is more than that of a thermosetting resin. , The thermal stress becomes small, and the connection part becomes stable. Further, since the connecting portion can be visually recognized from the side opposite to the side where the driving chip 5 is mounted, the connection work can be managed easily.

The present invention is not limited to the above-described embodiment, but various modifications can be made if necessary.

[0027]

As described above, according to the driving chip connection structure of the liquid crystal display panel according to the invention described in claim 1, the transparent intermediate substrate on which the driving chip is mounted and the electrode of the liquid crystal display panel are mounted. The terminal part is connected via a flat cable for panel connection. Since these flat cables for panel connection have flexibility, it is possible to bend the flat cable for panel connection at any position. The wiring can be routed very easily. In addition, even if the design is changed and the bending position or the routing position of the wiring is changed, simply changing the length dimension of the flat cable for panel connection does not require a large design change and can be done quickly and easily. Even if the pitch of the electrode terminals changes or the number of electrode terminals changes, it is possible to respond quickly and easily by changing the wiring pitch and the number of wiring of the flat cable for panel connection. Therefore, the cost required for the design change can be significantly reduced.

According to the second aspect of the present invention, the intermediate substrate on which the driving chip is mounted and the external circuit are connected via the flexible flat cable for external circuit connection. Since the external circuit connecting flat cable can be bent at any position, the wiring can be routed very easily. Even if the design changes such as the bending position of the wiring or the routing position or the pitch of the electrode terminals are changed, the length of the flat cable for external circuit connection, the wiring pitch, and the number of wirings. By changing the above, there is an effect that a large design change is not required, it can be dealt with quickly and easily, and the cost required for the design change can be remarkably reduced.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a driving chip connection structure of a liquid crystal display panel according to the present invention.

FIG. 2 is a side view of the driving chip connection structure shown in FIG.

FIG. 3 is a plan view showing a driving chip connection structure of a conventional liquid crystal display panel.

FIG. 4 is a side view of the driving chip connection structure shown in FIG.

[Explanation of symbols]

1 Liquid crystal display panel 2 transparent substrate 3 electrode terminals 4 Intermediate board 5 Drive chip Flat cable for 7 panel connection 9 Flat cable for external circuit connection

Continued front page    F term (reference) 2H089 KA17 QA12 QA16 TA03 TA07                 2H092 GA50 NA25 PA06                 5C094 AA43 AA44 BA43 DB01 DB02                       DB08 HA08                 5G435 AA17 BB12 EE34 EE37 EE42                       EE47 LL07 LL08

Claims (2)

[Claims] 1. A drive chip connection structure for a liquid crystal display panel for electrically connecting an electrode terminal portion of a liquid crystal display panel and a drive chip, wherein a wiring pattern is formed on a transparent intermediate substrate, and the intermediate substrate is formed. A driving chip connected to the wiring pattern is mounted on the wiring pattern, and the wiring pattern of the intermediate substrate and the electrode terminal portion of the liquid crystal display panel are electrically connected via a flat cable for panel connection. This is a chip connection structure for driving a liquid crystal display panel. 2. The driving chip for a liquid crystal display panel according to claim 1, wherein the wiring pattern of the intermediate substrate and an external circuit are electrically connected via a flat cable for connecting an external circuit. Connection structure.