JPS6020103Y2 - liquid crystal display device - Google Patents

Description

[Detailed description of the invention] The present invention relates to transition between upper and lower electrode plates of multiple signal input terminals of liquid crystal display devices with high display density such as dot matrix liquid crystal display devices and display panels for liquid crystal televisions. It is.

As shown in FIG. 1, the function of the vertical conductor in a liquid crystal display device is to connect the signal input terminals of an upper electrode 103 disposed on an upper electrode plate 101 and a lower electrode 104 disposed on a lower electrode plate 102 opposite thereto. In order to transfer the signal to the upper electrode plate, conduction is established between the lower electrode signal input terminal 105 and the lower electrode via the conductive material 106.

Conventional vertical conduction is achieved by placing a paste-like conductive material on one of the upper and lower electrode plates by screen printing, etc., placing a sealant 107 for sealing the liquid crystal on the opposing electrode plate, and pasting the upper and lower electrode plates. Typical examples include a method in which electrical conductivity is obtained by curing the electrode plates together, and a method in which the upper and lower electrode plates are bonded together and then filled with Zolgoo to obtain electrical continuity.

Both of these have the disadvantage that when a plurality of upper and lower conductive members are arranged, they cannot be arranged close to each other.

In other words, in the former case, the paste-like conductive material diffuses when the upper and lower electrode plates are bonded and pressed together, making it difficult to form a fine pattern.

The latter is not suitable for fine patterns because it is difficult to control the solder filling range.

I will explain in more detail.

As shown in FIG. 2a, the paste conductive material is made of granular or flake carbon, silver, or tin powder as a conductive filler 201 and an epoxy, urethane, or silicone binder 202 that binds these powders. It consists of a resin and a solvent 203 such as xylene or thinner for viscosity adjustment.

The paste thickness when placed by screen printing is 2
Since the gap between the upper and lower electrode plates is about 10 Pm, the paste conductive material is compressed and diffused as shown in FIG. 2, except that some of the solvent evaporates.

In addition, solder has good wettability with glass when melted, and if the temperature of the upper and lower electrode plates is maintained, it can be easily filled to a depth of 5 by controlling the solder filling time. It is extremely difficult to precisely control its dimensions.

From the above points, it is not suitable for a multi-digit multiplex drive display device, and has the disadvantage that the size of the display device becomes large in order to secure the area for the upper and lower conductive members.

The present invention eliminates the drawbacks of the conventional structure.In order to improve the arrangement density of the conductive material in high-density liquid crystal display devices, the present invention prevents leakage between adjacent patterns due to the conductive material and also prevents the diffusion of the conductive material. The purpose is to contain it within a certain range.

The structure and features of the present invention will be explained below.

Upper electrode 40 arranged on upper electrode plate 401 as shown in FIG.
3, a lower electrode 404 disposed on the lower electrode plate 402 opposite thereto, a conductive material 406 for transferring the signal input terminal 405 to the upper electrode, and a partition 4 for preventing the conductive material from spreading.
07 and a seal 408 for sealing the liquid crystal.

There are two types of partition materials: inorganic materials such as glass paste, and organic materials such as epoxy resin and polyester resin.

It is easier to handle these partitioning materials if they are made of the same material as the liquid crystal seal.

The viscosity of the partition material is adjusted to 200 to 300 PS, and
Printing was placed on a mesh-sized screen at the same height as the sealing material at a height of 25 μm, and the solvent for viscosity adjustment was left in an atmosphere at a temperature of about 80°C to evaporate in advance to form a surface film. This prevents uneven crimping.

It is more advantageous in terms of positioning to print the conductive material on the side of the electrode plate where the partition is printed.
Since the tension of about 1 kg is applied, if the height of the partition material is large, printing arrangement becomes difficult.

Figure 4 shows an integrated liquid crystal sealing seal and partition, and the viscosity is adjusted to 200 to 300 PS as in Figure 3.
After printing and arranging with a screen of about 0.00 mesh, and pasting the upper and lower electrode plates after brebake, 14
Baking and pressure bonding is carried out at about 0°C, or about 520°C for glass paste.

The present invention can be applied not only to liquid crystal display devices, but also to conductive material arrangement structures of display devices such as EL and ECD, and is particularly applicable to α-N displays with a large number of digits and large-sized image displays.

It has great effects in terms of high quality and size reduction.

As explained above, the present invention has the following advantages: 1. When a plurality of signal input terminals are transferred to one side of the upper and lower electrode plates, the transferred terminals are insulated from each other by forming a partition using a sealant. Input signals are reliably supplied to the display device without leakage from each other, even when a large number of terminals that require top and bottom conduction are arranged side by side on panels with high display density such as matrix liquid crystal panels and liquid crystal televisions. There are special effects that can be achieved.

Further, since the partition is provided, the conductive agent does not protrude from the partition, and the diffusion thereof can be contained within the partition, and the insulation between the plurality of terminals arranged side by side can be maintained reliably.

[Brief explanation of the drawing]

FIG. 1 is a mechanical diagram of a liquid crystal display device using vertical conductive members. Figure 2 shows the constituent countries of the paste-like conductive material. Figure a is a screen-printed state diagram, and figure b is a state diagram when the upper and lower electrode plates are bonded together, showing the diffusion state of the conductive material. be. 101.204... Upper electrode plate, 102,205
...Lower electrode plate, 103,206... Upper electrode plate, 104.207...Lower electrode plate, 105
...Lower electrode signal input terminal, 106...
Conductive material, 107... Sealing material, 201...
...Conductivity filler, 202...Binder, 2
03...Solvent. 3 and 4 are structural diagrams in which a conductive member according to the present invention is provided with a partition. 401... Upper electrode plate, 402... Lower electrode plate, 403... Upper electrode, 404...
Lower electrode, 405...Lower electrode terminal, 406...
... Conductive material, 407... Partition material, 408.
...Sealing material.

Claims (1)

[Scope of utility model registration request] The upper and lower electrode plates are arranged to face each other with a predetermined gap maintained, the peripheral portions are sealed using a liquid crystal sealant, and the signal input terminal is moved to one side of the upper and lower electrode plates. In a liquid crystal display device in which a conductive material is used between the upper and lower electrodes to transfer the input terminals, the transferred signal input terminals are plural, and each of the plurality of terminals is coated with the sealant. A liquid crystal display device characterized in that partitions are formed and the devices are insulated from each other.