JPH05121854A - Connection structure of display apparatus - Google Patents

Abstract

PURPOSE:To electrically detect the connection state of a connector by measuring the electric value between the terminals for detection of displacement. CONSTITUTION:In the case that the first input terminals 4... and the second input terminals 11... are connected normally, input-side displacement detecting patterns 12a and 12b get completely in the displacement detection holes 6a and 6b provided at input-side displacement detecting terminals 5a and 5b, and do not lie upon the input-side displacement detecting terminals 5a and 5b. On the other hand, in the case that the first input terminals 4... and the second input terminals 11... are connected abnormally, the input-side displacement detecting patterns 12a and 12b slips out of the displacement detection holes 6a and 6b, and lie upon the input-side displacement detecting terminals 5a and 5b. Accordingly, the connection state between the first input terminals 4... and the second input terminals 11... can be detected by performing the continuity test while applying probes to the input-side displacement detecting terminals 5a and 5b, using a tester at the point of time of positioning or after completion of connection.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device connection structure, for example, a tape carrier package and a printed circuit board on which an IC device for driving a liquid crystal display panel in a liquid crystal display device is mounted, or the above tape carrier package. And a liquid crystal display panel connection structure.

[0002]

2. Description of the Related Art Generally, in a liquid crystal display device, a liquid crystal display panel, which is a glass substrate, and a printed circuit board, which is a rigid substrate, are mounted via a tape carrier package which is a flexible substrate on which an IC device for driving the liquid crystal display panel is mounted. It is connected.

The connection between the liquid crystal display panel and the tape carrier package and the connection between the tape carrier package and the printed circuit board will be described below with reference to FIG.
This will be described with reference to FIGS. 2, 4, 8, and 9.

The tape carrier package 1 is shown in FIG.
As shown in FIG. 3, the flexible substrate 2 is provided, and the IC device 3 is provided on the flexible substrate 2. An opening 2a is formed at one end of the tape carrier package 1, and the opening 2a is formed.
A plurality of first input terminals 4 are arranged side by side in a shape crossing a, and a plurality of first output terminals 7 are arranged side by side on the other end side.

As shown in FIG. 4, the printed circuit board 9 has a hard base material 10. On one end side of the hard base material 10, a connection area 10a is formed and the connection area 10a is formed. A plurality of second input terminals 1 having a shape crossing 10a
1 are formed at predetermined intervals so as to correspond to the first input terminals 4 provided on the tape carrier package 1, respectively.

On the other hand, the liquid crystal display panel 13 has a glass base material 16 as shown in FIG. 8, and a plurality of second output terminals 14 ... Are provided on one end side of the glass base material 16. The tape carrier package 1 is formed at predetermined intervals so as to correspond to the first output terminals 7 ...

The tape carrier package 1 and the printed circuit board 9 are connected to each other via solder. As shown in FIG. 1, the opening 2a of the tape carrier package 1 is provided at the end of the printed circuit board 9 where the connection region 10a is formed.
The end portion side where the mark is formed is placed with the end portions overlapped with each other, and the first input terminal 4 of the tape carrier package 1 and the second input terminal 11 of the printed circuit board 9 are aligned with each other. After that, an automatic soldering device (not shown) is used to solder and electrically connect each of the openings 2a.

On the other hand, the tape carrier package 1 and the liquid crystal display panel 13 are connected to each other by, for example, an anisotropic conductive film. As shown in FIG. 9, the end portion side of the liquid crystal display panel 13 on which the second output terminals 14 are formed and the end portion side of the tape carrier package 1 on which the first output terminals 11 are formed are anisotropic. The first output terminal 11 ... And the second output terminal 14 ... are aligned with each other through the conductive conductive film, and then they are heated and pressurized to be electrically connected.

However, as described above, the terminals facing each other,
For example, even when the first input terminals 4 ... And the second input terminals 11 ... Are connected while being aligned, a positional deviation may occur between the opposing terminals. Therefore, conventionally, the positional deviation between the opposing terminals is mainly detected visually after the connection.

[0010]

As described above, in the above-mentioned connection structure, it is necessary to rely on visual detection for detecting the positional deviation between the terminals facing each other. Therefore, detection omission is likely to occur, defective products flow out to the next process, the defective rate of the product increases, and the manufacturing cost increases. Further, since it requires visual detection, there is a problem that it is difficult to realize complete automation of the process.

It is an object of the present invention to provide a display device connection structure capable of automatically detecting a positional deviation during or after connection, and predicting the connection state.

[0012]

In order to solve the above-mentioned problems, a connection structure of a display device according to the present invention has a structure in which both connection terminal portions of a pair of substrates are arranged in a plurality of connection terminal portions. In a connection structure of a display device in which they are connected to each other so as to be connected to each other, a plurality of positional deviation detection terminals are provided in a connection terminal portion of one of the pair of substrates. , The degree of overlap with the position deviation detection terminal changes in the connection terminal portion of the other board of the pair of boards according to the overlapping state of both connection terminal portions, and the electrical resistance between the position deviation detection terminals is increased. It is characterized in that a misregistration detection pattern for changing the value is provided.

[0013]

According to the above structure, when the connection terminal portions of the pair of substrates are connected in a state of being overlapped with each other, the connection terminal portions are connected by measuring the electric resistance value between the position deviation detection terminals. The state can be detected electrically.

For example, the misregistration detection terminals are provided on both ends of the connection terminal portion of one board, and the misregistration detection pattern which is an electrically closed circuit is provided at the connection terminal portion of the other board. .. When both connection terminal portions are connected without positional displacement, the positional displacement detection terminals and the positional displacement detection patterns corresponding to these terminals do not overlap each other. When the connection is made in a position shifted state, the position shift detecting terminal and the position shift detecting pattern overlap each other. At the time of connection or after the connection, a probe such as a tester is applied to each of the displacement detecting terminals to check whether or not there is continuity between the displacement detecting terminals. If there is continuity, there is a displacement, and if there is no continuity,
It can be determined that the connection is made without any displacement.

[0015]

[Embodiment 1] FIG. 1 shows an embodiment of the present invention.
The following is a description with reference to FIG.

In the liquid crystal display device of this embodiment, as shown in FIG. 6, a liquid crystal display panel 13 and a printed circuit board 9 are mounted via a tape carrier package 1 on which an IC device 3 for driving the liquid crystal display panel 13 is mounted. The connection structure of the display device of the present invention is applied to the connection between the tape carrier package 1 and the printed board 9.

The tape carrier package 1 is shown in FIG.
As shown in FIG. 3, the flexible base material 2 made of a flexible material is provided, and the IC device 3 is provided on the flexible base material 2. An opening 2a is formed at one end of the flexible base material 2,
A plurality of first input terminals (connection terminal portions) 4 ... Are provided in the opening 2a, for example, a line width of 0.6 mm and a pitch dimension of 1.2 mm.
Thus, they are juxtaposed so as to cross the opening 2a. Each tip of the first input terminals 4 extends to the opening 2a, and the other end is connected to each terminal of the IC device 3.

As shown in FIG. 3, the input side positional deviation detection terminals 5a and 5b are provided on both ends of the first input terminals 4 ...
(Position detecting terminals) are provided, and the input side position detecting terminals 5a, 5b are provided with position detecting holes 6a, 6b, respectively. The shapes of the position shift detection holes 6a and 6b will be described later.

On the other hand, as shown in FIG. 4, the printed circuit board 9 has a hard base material 10 made of a hard base material, and one end side of the hard base material 10 is provided on the tape carrier package 1. A connection region 10a corresponding to the opening 2a is formed.

In this connection region 10a, a plurality of second input terminals (connection terminal portions) 11 ... Are provided with a line width of 0..0 so as to correspond to the first input terminals 4 ... provided on the tape carrier package 1. It has a size of 6 mm and a pitch dimension of 1.2 mm, and is formed in a shape crossing the connection region 10a.

On both sides of the second input terminals 11 ...
Position shift detection holes 6a and 6b provided in the input side position shift detection terminals 5a and 5b of the tape carrier package 1.
Corresponding to the electrically closed circular input side position deviation detection patterns 12a and 12b (position deviation detection patterns).

In this embodiment, the mutual positional deviation limit amounts of the first input terminal 4 and the second input terminal 11, which are opposed to each other, are
For example, it is set to 1/2 of the line width of each terminal. Therefore, the input side positional deviation detection patterns 12a and 12b are provided.
When the diameter of the input side positional deviation detection pattern is set to 0.6 mm, the diameter of the positional deviation detection holes 6a and 6b formed in the corresponding input side positional deviation detection terminals 5a and 5b is the same as that of the input side positional deviation detection pattern. The size is set to 1.2 mm, which is the size of the diameter of 12a and 12b plus twice the displacement limit amount.

As shown in FIG. 1, the tape carrier package 1 and the printed circuit board 9 are connected to each other on the end side where the connection area 10a of the printed circuit board 9 is formed and the opening 2a of the tape carrier package 1. The formed end portion side is placed with the printed circuit board 9 facing downward and the end portions are overlapped with each other, and provided on the printed circuit board 9 and the first input terminals 4 provided on the tape carrier package 1. Second
The input terminals 11 ... Are aligned so as to face a predetermined partner, and are soldered by using an automatic soldering device (not shown).

When the first input terminals 4 and the second input terminals 11 are normally connected, that is, when the amount of positional deviation between the opposing terminals is less than half the line width of the terminals. As shown in FIG. 1, the input side positional deviation detection patterns 12a and 12b are connected to the input side positional deviation detection terminals 5a and 5b.
In the position deviation detecting holes 6a and 6b provided in b, the terminals 5a and 6b are completely inserted, and the input side position deviation detecting terminal 5a.
・ Does not overlap with 5b.

On the other hand, the first input terminal 4 ... And the second input terminal 1
1 is abnormally connected to each other, that is, when the positional deviation amount between the opposing terminals is larger than 1/2 of the line width of the terminals, as shown in FIG. Patterns 12a and 12b are holes 6a
6a, the input side position deviation detection terminals 5a, 5
It will overlap with b.

Therefore, in the above configuration, the first
The connection state between the input terminals 4 ... And the second input terminals 11 ... At the time of performing the alignment or after the connection is completed, for example, using a tester or the like, the input side positional deviation detection terminal 5a.
By applying a probe to 5b and conducting a continuity test,
It is possible to detect that the connection is abnormal if the connection is conducted and the connection is normal if the connection is not conducted.

As described above, since the connection state can be detected by checking the presence or absence of conduction, the connection state of the first input terminals 4 ... And the second input terminals 11 ... Can be easily managed. Further, the input side position deviation detection terminals 5a, 5
the diameters of the positional deviation detection holes 6a and 6b provided in b,
By appropriately setting the ratio to the diameters of the input side positional deviation detection patterns 12a and 12b, it is possible to perform detection corresponding to the positional deviation limit amount. As a result, as in the past, outflow of defective products to the next process due to detection omission is suppressed and the defect rate is reduced, and complete automation of the process is possible, which reduces manufacturing costs and improves product reliability. The effect of doing is obtained.

In this embodiment, the input side position deviation detecting terminals 5a and 5b and the input side position deviation detecting patterns 12a and 12b are provided at both ends of the first input terminal 4 and the second input terminal 11. However, the present invention is not limited to this. For example, three terminals are provided between the first input terminal 4 ... And the second input terminal 11. May be.

[Embodiment 2] Another embodiment of the present invention is shown in FIG.
The following is a description with reference to FIGS. 6 to 11. For convenience of explanation, members having the same functions as the members shown in the drawings of the above-described embodiments are designated by the same reference numerals, and the description thereof will be omitted.

The connection structure of the display device of the present invention is also applied to the connection between the liquid crystal display panel 13 and the tape carrier package 1 in the liquid crystal display device of the above embodiment shown in FIG.

A plurality of first output terminals (connection terminal portions) 7 ... Are provided on one end side opposite to the opening 2a of the tape carrier package 1 shown in FIG. 2, for example, a line width of 0.15 mm and a pitch dimension of 0. It is formed with 0.3 mm. This first output terminal 7
One end of each of ... Is connected to each terminal of the IC device 3, respectively.

As shown in FIG. 7, on both ends of the first output terminals 7 ...
8 are provided respectively. These output side positional deviation detection pattern portions 8 and 8 are respectively composed of output side positional deviation detection patterns 8a and 8b (positional deviation detection patterns). These output-side positional deviation detection patterns 8a and 8b are electrically closed circuits, and their wiring resistances are negligible.

On the other hand, as shown in FIG. 8, the liquid crystal display panel 13 has a glass base material 16 made of glass or the like, and one end of the glass base material 16 is provided with the tape carrier package 1. The second output terminals (connection terminal portions) 14 ... Corresponding to the provided first output terminals 7 ...
It is formed with a pitch of 5 mm and a pitch of 0.3 mm. On both end sides of the second output terminals 14, output side positional deviation detection terminal portions 15.1 corresponding to the output side positional deviation detection pattern portions 8 provided on the tape carrier package 1.
5 are provided respectively. These output side positional deviation detection terminal portions 15 and 15 are respectively composed of two terminals of output side positional deviation detection terminals (positional deviation detection terminals) 15a and 15b. The total wiring resistance of 15a and 15b is about 20Ω.

The tape carrier package 1 and the liquid crystal display panel 13 are connected via an anisotropic conductive film. This anisotropic conductive film is made of conductive particles (Ni particles, solder particles, or plastic-plated particles obtained by plating the surface of Ni particles, solder particles, or plastic particles with a predetermined thickness) in a thermoplastic or thermosetting resin that is an electrical insulator. Are dispersed uniformly, and the connection resistance is about 10Ω.

As shown in FIG. 9, the first output terminals 7 formed on the tape carrier package 1 and the second output terminals 14 formed on the liquid crystal display panel 13 are formed of an anisotropic conductive film (not shown). Are placed so as to face a predetermined partner via the tape carrier package 1 and are heated and pressurized from the side of the tape carrier package 1 to face the second output terminal 14 ...
Are connected via conductive particles of the anisotropic conductive film.

When the first output terminal 7 and the second output terminal 14 are connected without displacement, the output side displacement detection patterns 8a and 8b and the output side displacement detection terminal 15a.・ 15b is, as shown in FIG.
It will be completely overlapped.

On the other hand, the first output terminal 7 ... And the second output terminal 1
As the amount of positional deviation with 4 increases, the overlapping area between the output side positional deviation detection patterns 8a and 8b and the output side positional deviation detection terminals 15a and 15b decreases, and the positional deviation exceeds the line width of the terminal. If the error occurs, as shown in FIG.
It has no overlapping area.

Therefore, in the above-described structure, the output side positional deviation detecting terminal 15a of one output side positional deviation detecting terminal portion 15a is used by using, for example, a tester at the time of performing the alignment or after the connection is completed. The connection state can be detected by applying a probe to each of 15b and measuring the resistance value.

For example, the mutual positional deviation limit amount of the first output terminal 7 and the second output terminal 14 which are opposed to each other can be calculated as 2 of the line width of the terminal.
When set to / 3, when the positional displacement amount between the terminals is zero, the resistance value is the output side positional displacement detection terminal 15a.
The total wiring resistance of 5b is about 20Ω and the connection resistance of the anisotropic conductive film is about 10Ω, which is about 30Ω. Then, as the amount of positional deviation increases, the output side positional deviation detection terminals 15a and 15b and the output side positional deviation detection pattern 8 are formed.
The overlapping area with a · 8b decreases and increases from 30Ω. When the amount of displacement is larger than 2/3 of the line width of the terminal, the resistance value is 120Ω or more. Therefore, the resistance value between the output side positional deviation detection terminals 15a and 15b is 1
Those with 20Ω or more may be regarded as an abnormal connection.

As described above, since the connection state can be detected by measuring the resistance value, the first
The connection state between the output terminals 7 and the second output terminals 14 can be managed. Therefore, the same effect as that of the first embodiment can be obtained.

In this embodiment, the output side positional deviation detection pattern portions 8 and the output side positional deviation detection terminal portions 15 and 15 are connected to the first output terminal 7 ... And the second output terminal 14 ... However, the present invention is not limited to this, and may be formed only on one end side, or may be provided at several places to facilitate detection.

[0042]

As described above, the display device connection structure according to the present invention is provided with a plurality of positional deviation detection terminals in the connection terminal portion of one of the pair of substrates. In the connection terminal portion of the other board of the pair of boards, the degree of overlap with the position deviation detection terminal changes according to the overlapping state of both connection parts, and the electric resistance value between the position deviation detection terminals is changed. This is a configuration in which a misregistration detection pattern that gives a change is provided.

Therefore, it is possible to electrically detect the positional deviation of both connection terminal portions, so that the detection omission is suppressed as compared with the conventional case where the detection is visually performed, and the next step Defective products are prevented from flowing out. Therefore, the defect rate and the manufacturing cost can be reduced, and the process can be fully automated.

[Brief description of drawings]

FIG. 1 is a schematic plan view of relevant parts showing a connection state between a tape carrier package and a printed circuit board of a liquid crystal display device according to a first embodiment of the present invention.

FIG. 2 is a schematic plan view of the tape carrier package.

FIG. 3 is a schematic plan view of relevant parts of a portion of the tape carrier package involved in connection with a printed circuit board.

FIG. 4 is a schematic plan view of relevant parts of a portion of the printed circuit board, which is involved in connection with the tape carrier package.

FIG. 5 is a schematic plan view of essential parts showing a connection state between the tape carrier package and a printed circuit board.

FIG. 6 is a schematic plan view showing a main part of the liquid crystal display device.

FIG. 7 is a schematic plan view of relevant parts of a portion related to connection with a liquid crystal display panel of a tape carrier package of a liquid crystal display device according to a second embodiment of the present invention.

FIG. 8 is a schematic plan view of relevant parts of a portion of the liquid crystal display panel involved in connection with the tape carrier package.

FIG. 9 is a schematic plan view of relevant parts showing a connection state between the tape carrier package and a liquid crystal display panel.

FIG. 10 is an enlarged view showing a connection state between the output side positional deviation detection terminal and the output side positional deviation detection pattern in the liquid crystal display device.

FIG. 11 is an enlarged view showing a connection state between the output side positional deviation detection terminal and the output side positional deviation detection pattern in the liquid crystal display device.

[Explanation of symbols]

1 Tape Carrier Package (Substrate) 4 1st Input Terminal (Connecting Terminal) 5a Input Side Misregistration Detection Terminal (Position Detection Terminal) 5b Input Side Misregistration Detection Terminal (Position Detection Terminal) 7 1st Output terminal (connection terminal portion) 8a Output side positional deviation detection pattern (positional deviation detection pattern) 8b Output side positional deviation detection pattern (positional deviation detection pattern) 9 Printed circuit board (board) 11 Second input terminal (connection) Terminal part) 12a Input side position deviation detection pattern (position deviation detection pattern) 12b Input side position deviation detection pattern (position deviation detection pattern) 13 Liquid crystal display panel (board) 14 Second output terminal (connection terminal part) 15a Output side positional deviation detection terminal (positional deviation detection terminal) 15b Output side positional deviation detection terminal (positional deviation detection terminal)

Claims (1)

[Claims] 1. A connection structure of a display device, wherein both connection terminal portions of a pair of substrates are connected to each other so that a plurality of terminals arranged in each connection terminal portion are connected to each other, wherein In the connection terminal part of one of the
A plurality of misregistration detection terminals are provided, and the degree of overlap with the misregistration detection terminals is determined by the connection terminal portion of the other substrate of the pair of substrates, depending on the overlapping state of both connection terminal portions. A connection structure of a display device, wherein a position deviation detection pattern is provided which changes and changes the electric resistance value between the position deviation detection terminals.