JPS63157186A - Electric connector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a liquid crystal electrical connection snow-making device in which the electrode terminals of a cell and the terminals of a printed board are conductively connected by an elastic connector. .

(Prior Art) Among electrical connection devices, for example, a liquid crystal display device includes a liquid crystal cell 11 having a display function using liquid crystal, as shown in FIG.
, a printed board 12 on which a drive circuit for this cell 11 is formed, and an elastic connector 13 that conductively connects these two.
It is roughly constructed by

As shown in FIG. 6, the cell 11 has two glass plates 15, 16, on which transparent electrodes 17, 18 are formed, for example, of indium oxide. and,
These transparent filis 17 and 18 are combined so as to face each other, and a liquid crystal is sealed between them. Side edges 15a of each glass plate 15,16.

Electrode terminals 17a and 18a are formed on 1f3a, respectively, and the side edges isa and 16a on which the electrode terminals 17a and 18a are formed are closer to the side edges 16b and 15b of the glass plate 16.15 on the other side. It is configured so that it protrudes laterally and can be connected to the outside.

The electrode terminals 18a formed on the side edges 16a of the lower glass plate 16 face upward in the drawing, and are in the same direction as the terminals 12a of the printed board 12 shown in FIG. In other words, the terminal 1 formed on the side edge of the printed board 12
The front surface of 2a faces the back surface of the electrode terminal 18a of the cell 11. Note that the surface of the electrode terminal 17a formed on the side edge 15a of the upper glass plate 15 faces downward in the figure, and the third
The corresponding terminals formed on the upper surface of the printed board 12 shown in the figure are in a state where their surfaces are facing the same direction.

In this way, since the electrode terminals 17a of the upper glass plate 15 and the terminals of the printed board 12 are arranged facing each other, their conductive connection is easy.
Connection can be made without problems using a conductive rubber connector, etc., as added in Japanese Patent No. 101521.

On the other hand, the electrode terminal 18a of the lower glass plate 16 faces upward together with the terminal 12a of the printed board 12 shown in FIG. Body 13 is used.

The elastic connecting body 13 has a rectangular parallelepiped shape as shown, and a U-shaped recess 20 is formed on its negative side (right side in FIG. 4). This recess 20 is formed to closely engage with the side edge 16a of the lower glass plate 16. Further, one end surface (lower surface in the figure) is installed so as to be bonded to the surface of the terminal 12a of the printed board 12. Reference numeral 21 denotes a conductive part made of conductive rubber or the like, which has an inverted shape, and one of which (upper part in the figure) is connected to the upper surface part and side wall in the recess 20 to be connected to the electrode terminal 18a of the lower glass plate 16. exposed as a section. The other end (lower end in the figure) is the terminal 1 of the printed board 12.
It is exposed to be joined to 2a. Other parts are integrally covered with an insulating material 22 such as insulating rubber.

Further, a large number of the conductive parts 21 are arranged in parallel in the longitudinal direction of the elastic connector 13 with an insulating material 22 in between, as shown in FIG. The pitch of this conductive part 21 is the same as that of the electrode terminal 1.
1/3 to 1/10 of the terminal width of terminal 8a and terminal 12a
Set the pitch to . Specifically, it used to be about 01 darkness, but recently the density has increased, and the pitch is 70μ,
The size has become smaller than 50μ, and the number of 30μ bits is increasing. Since the pitch of the conductive portions 21 is set smaller than the electrode terminals 18a and the terminals 12a in this way, ? ! ! Connection is made while maintaining insulation between the electrode terminals 18a and between the terminals 12a.

As shown in FIGS. 3 and 4, the elastic connecting body 13 has one end surface (lower end surface shown) in a state in which the side edge 16a of the glass plate 16 is tightly engaged in the U-shaped recess 20. can be placed on the terminal 12a of the printed board 12. After the conductive part 21 is aligned with the electrode terminal 18a and the terminal 12a, they are fixed together under a pressure of 10 to 20% compression in the vertical direction.

During this compression process, an outward force acts on the elastic connector 13 as shown by the arrow in FIG. Some of it comes into contact with the outside air.

(Problems to be Solved by the Invention) As described above, since a part of the conductive part 21 comes into contact with the outside air,
Used in a high humidity environment with a relative humidity of 90% or more, or
If the ambient temperature suddenly rises during the winter due to entering the space from the outside, moisture will adhere to this area and the insulation performance of the insulating material 22 shown in FIG. 5 will be reduced. In particular, this tendency becomes even stronger as the pitch described above becomes smaller, reducing the insulation resistance between the electrode terminals 18a and between the terminals 12a. When this insulation resistance becomes several tens of ohms or less, drive signal leakage occurs between adjacent electrodes, causing distortion in the drive waveform, resulting in a drop in the liquid crystal drive voltage and a visually perceptible drop in display density.

Since the amount of moisture adhering to the conductive portion 21 described above varies depending on the location due to dirt or foreign matter adhering to the surface, the decrease in insulation resistance also varies depending on the location, which appears as uneven density in the liquid crystal display.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electrical connection device that prevents a decrease in insulation resistance due to moisture adhesion and the occurrence of uneven shading on a liquid crystal display caused by this.

[Structure of the invention]

(Means for Solving the Problems) The electrical connection device according to the present invention is composed of a cell, a printed board for driving the cell, and an elastic connection body that conductively connects these.

The cell has a plate shape, and an electrode terminal is formed on one side edge of the cell.

A terminal is also formed on one side of the side edge of the printed board, and the terminal is arranged so that the front surface of the terminal faces the back surface of the electrode terminal of the cell.

The elastic connecting body has a rectangular parallelepiped shape, and a recess is formed on the lower side. A side edge portion on which an electrode terminal of the cell is formed is tightly engaged with the recessed portion, and one end is joined to the terminal surface of the printed board. Further, the elastic connecting body has a conductive portion that is bonded to the electrode terminal of the recess and the terminal surface of the printed board.

The conductive portion exposed in the recessed portion of the elastic connector is cut off from the outside air.

(Function) In the present invention, the joint portion of the conductive portion constituting the elastic connector with the electrode terminal of the cell is cut off from the outside air.

Therefore, even if condensation occurs when used in high humidity conditions or due to a sudden rise in ambient temperature, condensation will not form on the conductive parts, so the insulation resistance between the conductive parts will not decrease, and the resulting For example, it is possible to prevent unevenness in density on a liquid crystal display.

(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In the embodiment shown in FIG. 1, the basic structure is similar to the conventional structure shown in FIGS. 3 to 6, and the liquid crystal display function consists of two glass plates 15 and 16 on which transparent electrodes are formed. The present invention has a liquid crystal cell 11 having a 3D display panel and a printed circuit board 12 on which a driving circuit for the cell 11 is formed. Side edge 1 of cell 11
An electrode terminal 18a is formed on the printed board 6a, and a terminal 12a is also formed on the side edge of the printed board 12. The printed board 12 is assembled so that the front surface of the terminal 12a faces the back surface of the electrode terminal 18a of the cell 11. Also,
Electrode terminals t8a of these cells 11 and terminals 12a of printed board 12 are electrically connected by elastic connectors 13.

The elastic connector 13 has a rectangular parallelepiped shape like the conventional one, and has a U-shaped recess 20 on its negative side (left side in the figure) that tightly engages with the side edge 16a of the cell 11. One end (lower end in the figure) is placed on the terminal 12a of the printed board 12. Further, this elastic connecting body 13 has a conductive part 21 made of conductive rubber or the like as in the conventional case, but the difference from the conventional case is that this conductive part 21 is connected to the joint surface with the electrode terminal 18a in the recess 20. and terminal 1 of the printed board 12
2a (bottom end in the figure), and all other parts are integrally covered with an insulating material 22 such as silicone rubber and are cut off from the outside air.

In the above configuration, the elastic connector 13 is subjected to a pressure of 10 to 20% compression in the vertical direction during assembly, and is held and fixed together by the bepil 25.

At this time, an outward force is applied to the elastic connector 13 as shown by the arrow, and a gap 20a is created in the U-shaped recess 20 between it and the side edge 16a of the cell 11. However, in the present invention, the conductive part 21 of the elastic connecting body 13 is entirely covered with the insulating material 22 except for the joints with the electrode terminal 18a and the terminal 12a, so that the conductive part 21 of the elastic connecting body 13 is covered with the insulating material 22, unlike the conventional case. Moisture due to dew condensation or the like does not adhere to a portion of the conductive portion 21. Therefore, each conductive portion 21 shown in FIG.
There is no reduction in insulation resistance between the two, and no unevenness in density occurs on the liquid crystal display.

Note that the thickness of the insulating material 22 that covers the conductive portion 21 at the portion corresponding to the recess 20 may be about 0.4 to 0.6 seconds.

Next, the embodiment shown in FIG. 2 has the basic internal structure (blue) is the same as the conventional one shown in FIGS. 3 to 6, but the conductive part 21 of the elastic connector 13 is exposed. U-shaped recess 2
A barrier material 26 made of a moisture-resistant material is coated and solidified on both end surfaces of the recess 20 to shut off the entire recess 20 from the outside air.

With this configuration, as shown in Figures 3 and 4,
A gap 20a is created in the recess 20 by the compression of the elastic connector 13, and even if a part of the conductive part 21 is exposed, this gap 2Oa itself will not cause the upper part of the prlff material 26 to leak. As a result, the conductive part 2
This means that the exposed portion of No. 1 is closed to the outside air.

Therefore, even when used in high humidity conditions or in conditions where there is a sudden rise in outside temperature, moisture will not adhere to the exposed portion of the N-conducting portion 21, and therefore the liquid crystal display will be displayed due to a decrease in insulation resistance. There is no occurrence of uneven shading on the top. The above-mentioned barrier material 26 is preferably one that exhibits water repellency by solidifying after application of silicone varnish or the like.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to prevent a decrease in insulation resistance due to moisture adhering to the conductive portion of an elastic connector and the occurrence of uneven shading on a liquid crystal display due to this, for example.
A stable display condition can always be obtained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of an electrical connection device according to the present invention, FIG. 2 is a perspective view showing another embodiment of the invention, FIG. 3 is a perspective view showing a conventional device, and FIG. The figure is IV of Figure 3.
-IV sectional view, FIG. 5 is a v-v19i plane view of FIG. 3, and FIG. 6 is an exploded perspective view of the cell shown in FIG. 3. 11...Cell, 12...Printed board, 12a...Terminal,
13...Elastic connection body, 16a...Side edge, 18a.
- Electrode terminal, 20... recess, 21... conductive part, 22...
Insulating material, 26...Shiya closing material.

Claims (3)

[Claims] (1) A cell that is plate-shaped and has an electrode terminal formed on one side of the side edge, and a cell that has a drive circuit for this cell and has a terminal formed on one side of the side edge and the surface of this terminal. a printed board which is arranged so as to face the back surface of the electrode terminal of the cell, and a recess formed in the shape of a rectangular parallelepiped and closely engaged with a side edge portion on one side of which the electrode terminal of the cell is formed; is characterized in that it comprises an electrode terminal of a cell of a printed board and an elastic connecting body having a conductive part that joins with the terminal of the printed board, and the conductive part exposed in the recess of the elastic connecting body is cut off from the outside air. Connection device. (2) The conductive part of the elastic connecting body is characterized in that only the joint surface with the electrode terminal of the cell and the joint surface with the terminal of the printed board in the recessed part is exposed, and the other parts are isolated from the outside air by an insulating material. An electrical connection device according to claim 1. (3) The electrical connection device according to claim 1, wherein both end surfaces of the recessed portion of the elastic connection body are covered with a barrier material to be cut off from outside air.