JPH0443911Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a chip-on type liquid crystal panel device in which an integrated circuit chip is mounted on a transparent substrate of the liquid crystal panel.

[Conventional technology]

As a conventional chip-on type liquid crystal panel device, there is one shown in FIG. 4, for example. P is a liquid crystal panel device, which includes two transparent substrates 2a of the liquid crystal panel 2 with a liquid crystal L interposed therebetween.
A chip-type integrated circuit 3 for driving a liquid crystal panel is provided on at least one side (back side in this example) of the transparent substrate 2a.
It consists of one equipped with. Further, 4 is a signal line for taking in measurement data etc. from the outside, 6 is a chip connection part, 7 is a signal line connection part, and the chip connection part 6, the signal line connection part 7, the integrated circuit 3, etc. A moisture-resistant coating 10 is applied over these to protect them from moisture.

[The problem that the idea aims to solve]

However, in such a conventional liquid crystal panel device P, the transparent substrate 2a as a glass plate and the moisture-resistant coating agent 10 are exposed until just before it is attached to a meter unit such as a front panel. When mounted on the meter unit, there is a risk that the light-transmitting substrate 2a on which the integrated circuit 3 is mounted may be cracked due to inadvertent force, and the entire liquid crystal panel device P may be damaged as a light-transmitting substrate 2a. Since it was covered with a glass plate, it had the problem of poor mounting performance. Moreover, if only the moisture-resistant coating 10 is used, the integrated circuit 3 will not be protected against moisture.
There were problems such as insufficient protection of the government.

This invention was made with attention to such conventional problems, and aims to solve the above problems by housing the liquid crystal panel in a watertight manner inside a case excluding the display surface.

[Means to solve the problem]

In the liquid crystal panel device according to this invention, a molding agent injection port is formed on the wall surface, and an opening is formed on the wall surface corresponding to the display surface of the liquid crystal panel, and the tip of the liquid crystal panel is placed in the opening all around the entire circumference. The device has a case equipped with an elastic member that is pressed against the panel surface in a watertight manner, and a molding agent is injected from the molding agent injection port into the space between the case and the liquid crystal panel. be.

[Effect]

The case of this invention protects the part of the liquid crystal panel housed in the case except for the display surface in a water-tight and cushioning manner by means of an elastic member and a molding agent. The translucent substrate is not exposed to the outside, thus preventing this translucent substrate from being easily cracked, and also serves to completely protect the integrated circuit from moisture.

[Example of idea]

This invention will be explained below based on the drawings. FIG. 1 is a diagram showing an embodiment of this invention. First, to explain the structure, 1 is a case having a mounting part 9 to a meter unit, and this is made of a metal plate, synthetic resin, or the like. 1a is case 1
This is a molding agent injection port opened on one side, and a lid 5 for sealing is placed over this. Further, 1b is an opening formed in the wall surface corresponding to the display surface of the liquid crystal panel 2 housed in the case 1, and 1c is an integrated circuit mounting section below the display surface, that is, the integrated circuit 3 and the chip connection section 6. , a circuit protection section that covers the signal line connection section 7 and the like. Reference numeral 11 denotes an elastic member made of rubber or the like attached to the entire circumference of the opening 1b, the tip of which is attached to the liquid crystal panel 2.
It is designed to be pressed against the surface in a watertight manner. As shown in FIG. 3, this elastic member 11 is made thinner on the knife toward the tip edge, and a fitting protrusion 11a is formed at the mounting base at the rear end, which fits into the opening of the case 1. It is fitted into the formed fitting groove 1d and integrated. Further, reference numeral 9 denotes an attachment portion provided on the outer periphery of the case 1 to the meter unit.

Further, in FIG. 2, reference numeral 8 denotes a molding agent, and after the liquid crystal panel 2 is housed in the case 1 as shown in FIG. injected into.
After the molding agent 8 is injected, the molding agent injection port 1a is sealed by the lid 5. In addition, prior to this sealing, in order to prevent airtightness from deteriorating due to twisting of the elastic member 11, the case 1 is
Send air inside. Then, the tip of the elastic member 11 comes into close contact with the surface of the liquid crystal panel 2 evenly over the entire area under air pressure. Note that other components that are the same as those shown in FIG. 4 are designated by the same reference numerals, and redundant explanation thereof will be omitted.

Next, the effect will be explained.

First, when the liquid crystal panel 2 is housed in the case 1 through the molding agent inlet 1a, the elastic member 11 facing the display surface surrounds the display surface of the liquid crystal panel 2.
The light-transmitting substrate 2a is closely attached to the transparent substrate 2a. Here, in order to prevent twisting of the elastic member 11, air is sent into the case 1 as described above. Next, a molding agent 8 is injected into the space between the case 1 and the liquid crystal panel 2, thereby molding the integrated circuit 3, the chip connection part 6,
After wrapping the signal line connection portion 7, the lid 5 is tightly fitted into the molding agent injection port 1a and fixed with adhesive, thereby making the space completely watertight.

In this way, the airtightness and watertightness of the liquid crystal display panel 2 except for the display surface are permanently maintained, so that the life of the integrated circuit is extended. Furthermore, since the liquid crystal display panel 2 is protected by the cover from external forces, it is possible to reliably prevent the display panel 2 from being damaged when it is mounted on a meter unit of a vehicle. Further, since the case 1 is provided with a mounting portion 9 for attaching the meter unit, the mounting efficiency is improved.

[Effect of idea]

As explained above, according to this idea,
The configuration is such that a molding agent inlet is provided on the wall,
An ivy case is provided with an opening in the area corresponding to the display surface of the liquid crystal panel, and also has an elastic member that presses against the liquid crystal panel around the entire circumference of the opening, and a mold is placed in the space between the case and the liquid crystal panel. By injecting the liquid into a sealant, it is possible to prevent damage to the liquid crystal display board when mounting it on the meter unit, and it is also possible to completely protect electrical circuits such as integrated circuits from moisture, making it suitable for use as a liquid crystal panel device. This has the effect of improving the reliability of the system.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing the liquid crystal panel device according to this invention, Fig. 2 is a vertical sectional view showing the internal structure of the liquid crystal panel device, and Fig. 3 is an enlarged sectional view showing the mounting structure of the elastic member to the case opening. 4 are perspective views showing a conventional liquid crystal panel device. 1... Case, 1... is molding agent inlet, 1
b...Opening, 2...Liquid crystal panel, 2a...Transparent substrate, 3...Integrated circuit, 8...Molding agent, 1
1...Elastic member, P...Liquid crystal panel device.

Claims (1)

[Scope of utility model registration request] In a liquid crystal panel device in which an integrated circuit 3 for driving a liquid crystal panel is mounted on the transparent substrate 2a of a liquid crystal panel 2 in which a liquid crystal L is sealed between a pair of transparent substrates 2a, a wall surface A molding agent injection port 1a is formed in the liquid crystal panel 2, and an opening is formed in the wall surface corresponding to the display surface of the liquid crystal panel 2.
The case 1 is provided with an elastic member 11 whose tip end is in pressure contact with the liquid crystal panel surface in a watertight manner over the entire circumference of the opening, and the liquid crystal panel 2
A liquid crystal panel device characterized in that a molding agent is injected into a space formed between the case 1 and the case 1 from the molding agent injection port 1a.