JPH0415561A - Connecting terminal device - Google Patents

Abstract

PURPOSE:To miniaturize the device by constituting it of plural second connecting terminals placed between plural first connecting terminals, a third connecting terminal connected to a first connected to a first conductor connected in common, and a fourth connecting terminal connected separately. CONSTITUTION:On one surface opposed to a connecting terminal 15 of a first substrate 23 having an electric insulating property, plural first connecting terminals 24 and second connecting terminals 25 are subjected to printed wiring. A first connecting terminal 24 and a second connecting terminal 25 can come into contact and can be separated separately with and from an odd number scanning line 14a of a liquid crystal display element 12 and an even number scanning line 14b, respectively. A first connecting terminal 24 is connected in common to a first conductor 26 formed on a first substrate 23, and also, on a first substrate 23, a third connecting terminal 27 and a fourth connecting terminal 28 are formed. A third connecting terminal 27, and a fourth connecting terminal 28 are connected separately and electrically to a first connecting terminal 24 and a first conductor 26, and a second connecting terminal 25, respectively. Accordingly, the device can be miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a connection terminal device that can be used for testing, for example, a rinse-type liquid crystal display device.

BACKGROUND OF THE INVENTION Among the row and column electrodes of an active matrix liquid crystal display element, for example, in order to easily check the conduction/blocking state between the row electrodes, that is, the leakage state, odd-numbered row electrodes are commonly connected, Alternatively, even-numbered row electrodes may be connected in common, and the electrical resistances of the odd-numbered row electrodes and even-numbered row electrodes that are commonly connected to each other may be measured. This makes it easy to find out whether a leak is occurring in the row electrodes.

Conventionally, probe pins were brought into contact with each row electrode individually.
In the test circuit connected to this probe pin, the leakage state described above is tested.

In the prior art using such probe pins, the structure becomes obviously large and the wiring process for the lead wires for individually connecting each probe pin becomes complicated.

Another prior art solution to this problem is shown in FIG. On the glass substrate 2 of the Actidama 1 helical liquid crystal display element 1, there are provided terminals 3 that are connected to row electrodes or column electrodes of the liquid crystal display element. A connecting terminal device 4 is connected to this terminal 3 to measure the electric resistance between the commonly connected odd-numbered and even-numbered row electrodes. In the conventional tangled connection terminal device 4, a terminal 6 which is overlapped and contacted with the connection terminal 3 is formed on a flexible wiring board 5 made of an electrically insulating material.
are individually connected to conductors 7 formed on a rigid electrically insulating substrate 6, for example via an anisotropic conductive adhesive layer.

Among the many connection terminals 3, the conductor connected to the odd-numbered connection terminal through the aforementioned connection terminal 6 is indicated by reference numeral 7a in FIG. The conductor connected via 6 is indicated by reference numeral 7b. Conductor 7a is commonly connected to conductor 8. In order to connect the conductors 7b in common, the wiring board 6 is provided with through holes 9, and these through holes 9 are commonly connected by a printed conductor on the lower surface of the wiring board 6 in FIG. , and further connected to the conductor 10 via the through hole 9a. In this way, the electrical resistance between the conductors 8 and 10 is measured by the test circuit, leakage between odd-numbered electrodes and even-numbered electrodes is tested, and the transparent electrodes of the liquid crystal display element 1 can be tested.

Furthermore, by using the flexible substrate 5, the connecting terminals 6 can be pressed against the connecting terminals 3 to easily bring them into contact with each other, which is convenient. Since this flexible substrate 5 is thin and flexible as described above, it is difficult to form through holes. Therefore, the wiring substrate 4 is used to form through holes 9 on a rigid substrate 6. The through holes 9 of the two are connected in common to the conductor 10 as described above.

Problem to be Solved by the Invention The prior art shown in FIG.
Since the through hole 9 is connected to the through hole 9, there is a problem that the structure becomes large.

An object of the present invention is to provide a connection terminal device with a reduced size.

Means for Solving the Problems The present invention provides the following features: (a>first connection member, the first connection member is formed on one surface of an electrically insulating first substrate at a distance from each other).
a plurality of first connection terminals that are arranged vertically and are connected to an external connection terminal so as to be able to come into contact with and be detached; Possible to connect multiple second
a connecting terminal, a first conductor that commonly connects the first connecting terminal, a third connecting terminal that is connected to the first connecting terminal and the first conductor, and a fourth connecting terminal that is individually connected to the second connecting terminal. a first connecting member formed with a connecting terminal; and (l) a second connecting member, the second connecting member comprising an electrically insulating second connecting member.
The second substrate has a substrate, and the second substrate is partially overlapped with the first substrate, and a third conductor is overlapped and connected to one surface of the second substrate opposite to the one surface of the first substrate. A second conductor configured by forming a fifth connecting terminal, a sixth connecting terminal that is individually stacked and connected to each of the fourth connecting terminals, and a second conductor that commonly connects the sixth connecting terminals. (c) an electric circuit is connected between the fifth connection terminal of the second connection member and the second conductor;

According to the present invention, the plurality of first and second connection terminals formed on one surface of the electrically insulating first substrate of the first connection member are connected to, for example, a row or row of an Actidama 1 liquid crystal square type liquid crystal display element. The second connection terminal is arranged between the first connection terminals, in other words, every one or more of the first connection terminals is electrically connected by contacting the connection terminals connected to the electrodes of the column. One or more second connection terminals are arranged alternately, the first connection terminals are commonly connected by the first conductor, and the first substrate is further provided with the first connection terminals and the first conductor. A third connection terminal to be connected and a fourth connection terminal to be individually connected to the second connection terminal are formed.
One surface of the electrically insulating second substrate of the connection member is opposite to the one surface of the first substrate, and a fifth electrode is provided on the one surface of the second substrate to overlap and connect to the third connection terminal. A connecting terminal is formed, and thus this fifth connecting terminal is electrically connected in common to the first connecting terminal, and each fourth connecting terminal of the first substrate is formed on the one surface of the second substrate. A sixth connection terminal is formed which is individually superposed and connected to the terminal, and the sixth connection terminal is connected in common by the second conductor. In this way, the second connection terminals formed on the first substrate are commonly connected by the second conductor,
Therefore, by connecting an electric circuit, such as a test circuit for measuring resistance, between the fifth connection terminal and the second conductor, it is possible to measure the electric resistance between the first and second connection terminals. become able to.

By using the first and second connecting members in this manner, it is possible to
It is no longer necessary to form the first and second connection terminals, and the first and second connection terminals can be connected in common, making it possible to downsize the configuration.

Example FIG. 1 is a perspective view of one embodiment of the present invention.

A plurality of scanning lines 14, which are, for example, row electrodes, are formed on the actidama 1 - one of the glass substrates 3 of the liquid crystal display element 12, and a connection terminal 15 is formed on each scanning line 14. The connection terminal device 16 according to the present invention is used to check whether the scanning lines 14 are mutually erroneously connected, that is, whether there is a leak.

FIG. 2 is a simplified electrical circuit diagram of the liquid crystal display element 12. Scanning line] Odd numbered scanning line among 4], 4
a is commonly connected by the present connection terminal device 16 as shown by reference numeral 26, and is connected to even-numbered scanning lines 1-4.
1:l is commonly connected as shown by reference mark]8,
These odd-numbered scanning lines 14a and even-numbered scanning lines]
, 4 b by one test circuit to measure the electrical resistance between these scanning lines], 4. The presence or absence of leakage between a and 14b can be easily inspected. Reference mark 1
4a, 1.41] may be collectively referred to as 14. Similarly, regarding the signal lines 20 which are the column electrodes of the liquid crystal display element 12, the odd-numbered and even-numbered signal lines 20
The presence or absence of leakage can be tested using one test circuit for each test circuit.

The connection terminal device 16 basically includes a first connection member 21 and a second connection member 22.

3 is a bottom view of the first connecting member 3 seen from below in FIG. 1, and FIG. 4 is a sectional view taken from the section line IVIV in FIG. 3. This first connecting member 16 is a so-called FPC (Flexible Preferred Circular).
A plurality of first connection terminals 24 and a plurality of second connection terminals 25 are printed and wired on one surface of an electrically insulating first substrate 23 facing the connection terminals 15. The first connection terminals 24 can individually contact and detach from the connection terminals 15 corresponding to the odd-numbered scanning lines 1-4a of the liquid crystal display element 12.

The second connection terminals 25 can individually contact and detach from the connection terminals 15 of the even-numbered scanning lines 14b.

The first connection terminals 24 are arranged at intervals on the left and right sides of FIG. 3, and between these first connection terminals 24,
A second connection terminal 25 is arranged. The first connection terminal 24 is
The first conductor 26 formed on the one surface of the first substrate 23
are commonly connected. Further, on the one surface of the first substrate 23, third connecting terminals 27 and fourth connecting terminals 28 arranged between the third connecting terminals 27 are formed. The third connection terminal 27 connects the first connection terminal 24 with the first
It is electrically connected to the conductor 26. 4th connection terminal 2
8 are individually electrically connected to the second connection terminal 25.

The first substrate 23 is made of an electrically insulating material such as polyimide and is flexible, and the first to fourth connection terminals 2425, 27, 28 and the conductor 26 formed on the one surface thereof are made of copper. , first and second connection terminals 24.
The width of 25 is 010 mm and its pitch is 0.2
0 mm, and the same applies to the third and fourth connection terminals 27,28. First and third connection terminals 24. ．． 27 are connected by two conductors, and the second and fourth connection terminals 25 and 28 are also connected in the same way. Covering layer 30,
3] is two such conductors and the first conductor 26 described above.
The covering layers 30 and 31 are made of electrically insulating synthetic resin, such as polyimide, and prevent erroneous electrical contact with the outside. In FIG. 3, the first to fourth connection terminals 24, 25°27.28 are shown with diagonal lines for convenience of illustration.

FIG. 5 is a plan view of the second connecting member 22. FIG.

This second connection member 22 has a fifth connection terminal 34, a sixth connection terminal 35, and a second conductor 36 that commonly connects the sixth connection terminal 35 on one surface of an electrically insulating second substrate 33. is formed. The one surface of the second substrate 33 faces the one surface of the first substrate 21 . The second substrate 33 is made of an electrically insulating material such as glass epoxy. A conductor 37 is connected to the fifth connection terminal 34 . A conductor 38 is connected to the second conductor 36 . A test circuit 19 is connected to these conductors 37, 38 to measure the electrical resistance between them. The fifth connection terminal 34, the sixth connection terminal 35, the second conductor 36, and the conductors 37, 38 are made of a material such as copper. In FIG. 5, each of these components 34 and 35 is shown for convenience of illustration.
, 36, 37, and 38 are shown with diagonal lines.

FIG. 6 is a sectional view taken along the section line ■--■ in FIG. 1. The three anisotropic conductive adhesive layers are composed of a conductive material 40 dispersed in a binder 41. The conductive material 40 may have a structure in which a metal plating layer is formed on, for example, metal particles such as carbon or Ni, or synthetic resin particles6.
The binder 41 may be a thermosetting synthetic resin such as epoxy, or a thermoplastic synthetic resin such as ester. Three anisotropic conductive adhesive layers are interposed between the first connecting member] 6 and the second connecting member 22, and pressure is applied without applying heat. As a result, one of the third connecting terminals 27 27a and the fifth connecting terminal 34 are electrically connected via the conductive material 40, and the fourth connecting terminal 28 and the sixth connecting terminal 35 are connected to each other via the conductive material 40. connected via. The area to which this anisotropic conductive adhesive layer 39 is applied is indicated by reference numeral W in FIGS. 3 and 5. In this way, the first connecting member 1G having the FPC structure and the PWB (I'rinte
d Wiring l1oad) structure is connected to the second connection part 22 through three anisotropic conductive adhesive layers,
The conductor 37 of the second connecting member 22 is commonly connected to the odd-numbered scanning line 14a of the liquid crystal display element 12, and the conductor 38 is connected to the even-numbered scanning line 1.4b, thus connecting the odd-numbered scanning line 14a and Even-numbered scanning lines 141] can be inspected for leakage.

Such first and second connection members 16, 22 can be constructed by printed wiring or the like, and there is no need to form through holes as described in connection with the prior art described above, which allows for miniaturization of the construction. Moreover, the productivity is good.

The width of the fifth and sixth connection terminals 34.35 is 0], Om
m, and the pitch of the connection terminals 35 is the same as that of the fourth connection terminal 2.
8. Corresponding to the pitch between each other, it is set to 0.40 mm.

As another embodiment of the present invention, not only one fourth connecting terminal 28 may be arranged between the third connecting terminals 27, but also a plurality of fourth connecting terminals 28 may be arranged between the fourth connecting terminals 28. In addition, a plurality of third connection terminals 27 may also be arranged, and fifth and sixth connection terminals 34 and 35 are formed corresponding to these third and fourth connection terminals 27 and 28. .

The first connecting member 16 may be made of PWBI,
Further, the second connecting member 22 may be made of FP]lJ,
Furthermore, these first and second connecting members], 6.2
2 may have other structures.

In addition, in liquid crystal display elements with a simple 7-trix structure in which supertwisted nematic liquid crystal is used as the liquid crystal, although indium tin oxide (TTO) is used for the scanning lines and signal lines, each pixel is In a liquid crystal display element with an active matrix structure, which uses a scanning line and a signal line 14.20 for supplying signals to a thin film transistor (abbreviated as TPT) or a nonlinear element 7- (abbreviated as MTM) as a switching element, the scanning line and signal line], Ta as 4.20, Te Mo Ap
Opaque metals such as Cr, Tj, CLl are used.

The connection terminal device of the present invention is not only suitable for testing the actuators 1 to 12 but also can be used in a wide range of applications for connection with other external connection terminals.

According to the present invention, the plurality of first connection terminals formed on one surface of the first substrate of the first connection member are connected in common by the first conductor, and the first connection terminals are connected in common by the first conductor. A third connecting terminal is connected to the terminal and the first conductor, and a fourth connecting terminal is further connected to the second connecting terminal on the one surface of the first substrate of the first connecting terminal. is formed,
A fifth connection terminal is formed on the second substrate of the second connection member, and the fifth connection terminal is stacked and connected to the third connection terminal, and the sixth connection terminal is stacked and connected to each of the fourth connection terminals individually. terminals are formed, these sixth connecting terminals are connected in common by the second conductor, so that the sixth connecting terminals are
The second conductor is commonly electrically connected to the plurality of first connection terminals, and the second conductor is commonly connected to the plurality of second connection terminals. Therefore, by connecting an electric circuit, such as a test circuit for measuring electrical resistance, between the fifth connection terminal and the second conductor, the electric characteristics between the first and second connection terminals, for example, the electric It becomes possible to measure resistance, and with such a configuration, the Surpol 9 described in the prior art described above is not required, and therefore miniaturization is possible.
Such first and second connection members can be easily realized by, for example, printed wiring, and have excellent productivity.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a simplified electrical circuit diagram for testing an active matrix liquid crystal display element 12, and FIG. 3 is a bottom view of the first connecting member 16. , FIG. 4 is a sectional view taken from the section line IV-IV in FIG. 3, FIG. 5 is a plan view of the second connecting member 22, and FIG.
FIG. 7 is a cross-sectional view taken along the section line ■■ in the figure, and a perspective view of the prior art. 12.Actituma 1-LCD liquid crystal display element, 14-
Transparent electrode, 1.4 a Odd number transparent electrode, 141
] Even-numbered transparent electrodes, 15 connection terminals,] 6. 1st
Connection member, 1... Inspection circuit, 23... First board, 2
4-first connection terminal, 25...second connection terminal, 26-first
Conductor, 27/3rd connection terminal, 28 4th connection terminal, 33-
・-Second board, 34・5th connection terminal, 35 6th connection terminal, 37・2nd conductor agent patent attorney stroke number Keiichi

Claims (1)

[Scope of Claims] (a) A first connection member, which is arranged on one surface of an electrically insulating first substrate at a distance from each other and connected to an external connection terminal. a plurality of first connection terminals to be connected in a contactable and detachable manner; and a plurality of first connection terminals arranged between these first connection terminals and connected in a contactable and detachable manner to other external connection terminals. 2 connection terminals, a first conductor that commonly connects the first connection terminals, a third connection terminal that is connected to the first connection terminal and the first conductor, and a third connection terminal that is individually connected to the second connection terminals. (b) a second connection member, the second connection member having an electrically insulating second substrate; is partially overlapped with the first substrate, and on one surface of the second substrate opposite to the one surface of the first substrate, a fifth connection terminal overlapped and connected to the third conductor, and each fourth (c) a second connection member configured by forming a sixth connection terminal that is individually overlapped and connected to the connection terminal, and a second conductor that commonly connects the sixth connection terminal; A connection terminal device characterized in that an electric circuit is connected between the fifth connection terminal and the second conductor of the two connection members.