JPH08320500A - Liquid crystal module and its production - Google Patents

Abstract

PURPOSE: To provide a liquid crystal module which protects the output lines of a TCP type IC by a low-cost and simple method and a producing method of this module. CONSTITUTION: This liquid crystal module has a liquid crystal panel 1 having electrode parts 4, a P board 2 which is a circuit board for supplying driving signals to this liquid crystal panel 1, the TCP type IC3 of which the input lines are connected to the P board 2 and the output lines 8 are connected to the electrode parts 4 and which is mounted on the P board and coating materials which coat both surfaces of output line exposing parts 9 exposed with the output lines 8 existing between the liquid crystal panel 1 and the P board 2. The liquid crystal module described above has an effect of easily and entirely eliminating the shorting defects between the output lines 8 of the TCP type IC3 by the conductive foreign matter at a low cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal module in which a circuit board having a TCP type IC for supplying a drive signal to a liquid crystal panel is connected, and a manufacturing method thereof.

[0002]

2. Description of the Related Art In recent years, TCP has been used as an IC mounting method.
A mounting method using a (tape carrier package) type IC is rapidly spreading. Especially, the mounting method of an IC that supplies a drive signal to a liquid crystal panel is mainly a mounting method using a TCP type IC, which has characteristics such as flexibility and narrow pitch compatibility.

FIG. 2 shows a TCP type I according to a conventional mounting method.
It is a block diagram of the liquid crystal module in which C was mounted. That is,
The liquid crystal panel 1 is a liquid crystal panel. TCP type IC3
It is a tape carrier package type IC. P board 2
Is a circuit board for mounting the TCP type IC 3 and supplying a drive signal to the liquid crystal panel 1. The electrode part 4 is T
It is a glass surface electrode portion of the liquid crystal panel 1 for connecting an input line (not shown) of the CP type IC 3. The resist 5 is a portion where the TCP type IC 3 is covered with a solder resist. The protective material 7 is, for example, a flex resin or a base film of the TCP type IC3. The output line 8 is an output line of the TCP type IC 3. The exposed portion 9 is the exposed portion of the output line 8.

Next, a method of manufacturing the liquid crystal module of this conventional example will be described.

The input line of the TCP type IC 3 is mounted on the P board 2. The output line 8 of the TCP type IC 3 mounted on the P plate 2 is mounted on the electrode portion 4 of the liquid crystal panel 1. At this time, an exposed portion 9 of the output line 8 of the TCP type IC 3 is formed between the P plate 2 and the liquid crystal panel 1. The exposed portion 9 of the electrode portion 4 on the side other than the connection surface is protected by the protective material 7.

[0006]

However, in such a conventional liquid crystal module as shown in FIG. 2, after the product is completed, for example, solder scraps are exposed on the exposed portion 9 of the TCP type IC 3 which is not protected by the protective material 7. A conductive foreign substance 10 such as a solder ball, aluminum, or SUS may be attached, and as a result, there is a problem that a display defect is caused by a line defect defect in which the output lines 8 of the TCP type IC 3 are short-circuited.

As a method for preventing this problem in FIG. 2, the exposed portion 9 is prevented from being generated, the entire liquid crystal module is sealed to prevent the conductive foreign matter 10 from entering and congesting, or the exposed portion 9 is entirely removed. A method of protecting with the protective material 7 may be considered.

In order to prevent the exposed portion 9 from being generated, the dimensional accuracy of the glass and the T relative to the liquid crystal panel 1 and the P plate 2 are set.
The CP type IC 3 is required to have extremely high positioning accuracy.
Considering expansion and contraction of the P plate 2 and the TCP type IC 3 due to temperature, some space is inevitably required.

When the entire liquid crystal module is sealed, the conductive foreign material 10 may be mixed in during the manufacturing process. In addition, there arises a problem of how to handle a connection part such as a connector for external power supply and signal supply. Depending on the sealing method, the conductive foreign substance 1 may be transferred from the connection part such as the connector.
There is a possibility that 0 will enter.

Regarding the method of protecting the entire exposed portion 9 with the protective material 7, one surface of the exposed portion 9 on the side other than the connection surface of the electrode portion 4 is already protected with the protective material 7 by the conventional mounting method. . Therefore, by applying the protective material 7 such as flex resin to not only one surface but also both surfaces thereof, the entire exposed portion 9 can be protected by the protective material 7. However, this method increases man-hours and costs. In addition, in the output line 8 connected to the electrode unit 4,
It is necessary to take measures to prevent the protective material 7 from flowing in. This measure makes it difficult to downsize the TCP type IC 3, which hinders the downsizing of the entire liquid crystal module.

After all, these methods cannot solve the problem, and even if they can be solved, they cause another problem that the cost is increased and the miniaturization of the entire liquid crystal module is hindered.

In view of the above problems of the prior art, it is an object of the present invention to provide a liquid crystal module which protects the output line of a TCP type IC by a low cost and simple method, and a manufacturing method thereof. .

[0013]

According to the present invention of claim 1, a liquid crystal panel having an electrode portion, a circuit board for supplying a drive signal to the liquid crystal panel, and an input line connected to the circuit board, The output line is connected to the electrode portion and covers all or part of both surfaces of the TCP type IC mounted on the circuit board and the exposed output line located between the liquid crystal panel and the circuit board. A liquid crystal module comprising a coating material.

According to the second aspect of the present invention, the coating material is a protective material which is a flex resin or a base film of the TCP type IC and an insulating material containing silicon as a main component, and the protective material is exposed. The liquid crystal module according to claim 1, wherein all or part of one side of the output line is protected, and the insulating material coats all or part of the other side of the exposed output line. is there.

According to the present invention of claim 3, a TCP type IC is mounted on a circuit board for supplying a drive signal to the liquid crystal panel,
The input line of the TCP type IC is connected to the circuit board, the output line of the TCP type IC is connected to the electrode part of the liquid crystal panel, and the exposed output located between the liquid crystal panel and the circuit board. A method for manufacturing a liquid crystal module, characterized in that all or part of both sides of a line is covered with a covering material.

In the present invention of claim 4, the coating material is a protective material which is a flex resin or a base film of the TCP type IC and an insulating material containing silicon as a main component, and the protective material is exposed. The liquid crystal module according to claim 3, wherein all or part of one surface of the output line is protected, and the insulating material coats all or part of the other surface of the exposed output line. It is a manufacturing method.

[0017]

In order to manufacture the liquid crystal module of the present invention, first, the TCP type IC is mounted on the circuit board for supplying the drive signal to the liquid crystal panel, and the input line of the TCP type IC is connected to the circuit board. . The output line of the TCP type IC is connected to the electrode part of the liquid crystal panel. Then, all or a part of both surfaces of the exposed output line located between the liquid crystal panel and the circuit board are covered with a covering material.

As the coating material, a flex resin or the above T
When a protective material that is a base film of a CP type IC and an insulating material containing silicon as a main component are used, the protective material protects all or part of one side of the output line exposed, and the insulating material is used. All or part of the other one side of the exposed output line is coated.

[0019]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of a liquid crystal module of the present invention. That is, the liquid crystal panel 1 is a liquid crystal panel. The TCP type IC3 is a tape carrier package type IC. The P plate 2 is a circuit board for mounting the TCP type IC 3 and supplying a drive signal to the liquid crystal panel 1. The electrode section 4 is a liquid crystal panel 1 for connecting an input line (not shown) of the TCP type IC 3.
It is a glass surface electrode part. Resist 5 is TCP type I
C3 is a portion covered with the solder resist. The insulating material 6 is, for example, Toray SE91, which is determined in consideration of corrosion resistance, low heat stress (softness), quick drying property, and the like.
87L of insulating resin. The protective material 7 is, for example, a flex resin or a base film of the TCP type IC3. The output line 8 is an output line of the TCP type IC 3. The exposed portion 9 is a portion where the output line 8 is exposed unless the insulating material 6 and the protective material 7 are coated.

Next, a method of manufacturing the liquid crystal module of this embodiment will be described.

The input line of the TCP type IC 3 is mounted on the P board 2. Then, the output line 8 of the TCP type IC 3 mounted on the P plate 2 is mounted on the electrode portion 4 of the liquid crystal panel 1. At this time, P
An exposed portion 9 of the output line 8 of the TCP type IC 3 is formed between the plate 2 and the liquid crystal panel 1.

From the electrode portion 4 to the resist 5 of the TCP type IC 3
Clean the area with an air blower so that foreign matter does not adhere to the area covered by. Then, the exposed portion 9 on the side other than the connection surface of the electrode portion 4 is protected by the protective material 7. Further, the exposed portion 9 on the connection surface side of the electrode portion 4 is coated with the insulating material 6.

In this embodiment, the exposed portion 9 of the electrode portion 4 which is not the connecting surface is protected by the protective material 7, and the exposed portion 9 of the electrode portion 4 on the connecting surface side is coated with the insulating material 6. However, not limited to this, the insulating material 6 may be provided on both surfaces of the exposed portion 9.
You may coat by. In short, the liquid crystal panel 1 and P
Both surfaces of the exposed portion 9 of the output wire 8 located between the plate 2 and the plate 2 may be covered with a covering material.

Further, in this embodiment, a part of the exposed portion 9 which is not the connection surface of the electrode portion 4 is protected by the protective material 7, but the exposed portion 9 may be entirely protected.

Further, in the present embodiment, the exposed portion 9 on the connection surface side of the electrode portion 4 is entirely coated, but it is not necessarily the entire portion and may be a part.

[0027]

As is apparent from the above, the present invention has an effect of easily eliminating a short circuit between output lines of a TCP type IC due to a conductive foreign substance at low cost.

The present invention is also extremely useful in practice.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment according to a liquid crystal module of the present invention.

FIG. 2 is a configuration diagram of a liquid crystal module in which a TCP type IC is mounted by a conventional mounting method.

[Explanation of symbols]

 1 ... Liquid crystal panel 2 ... P plate 3 ... TCP type IC 4 ... Electrode part 5 ... Resist 6 ... Insulating material 7 ... Protective material 8 ... Output line 9 ... ..Exposed parts 10 ... Conductive foreign matter

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeshi Ishigame 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (4)

[Claims] 1. A liquid crystal panel having an electrode part, a circuit board for supplying a drive signal to the liquid crystal panel, an input line connected to the circuit board, and an output line connected to the electrode part. TCP type IC mounted on the board
And a coating material that covers all or a part of both surfaces of the exposed output line located between the liquid crystal panel and the circuit board. 2. The covering material is a protective material which is a flex resin or a base film of the TCP type IC and an insulating material containing silicon as a main component, and the protective material is formed on one surface of the exposed output line. The liquid crystal module according to claim 1, wherein all or part of the output line is protected by the insulating material, and the insulating material coats all or part of the other surface of the output line. 3. A TCP type IC is mounted on a circuit board for supplying a drive signal to a liquid crystal panel, an input line of the TCP type IC is connected to the circuit board, and an output line of the TCP type IC is connected to the liquid crystal. A method for manufacturing a liquid crystal module, which is connected to an electrode portion of a panel and covers all or part of both surfaces of the exposed output line located between the liquid crystal panel and the circuit board with a covering material. 4. The covering material is a protective material which is a flex resin or a base film of the TCP type IC and an insulating material containing silicon as a main component, and the protective material covers one side of the exposed output line. The method for manufacturing a liquid crystal module according to claim 3, wherein all or part of the output line is protected, and the insulating material coats all or part of the other surface of the output line that is exposed.