JPH0728080A - Mounting structure of liquid crystal panel module - Google Patents

Abstract

PURPOSE:To simply build a liq. crystal panel into a housing case, to reduce the mounting cost and to eliminate the restriction on the part of a user by pressure-welding the panel on the case integrated with a connector through a conductive rubber. CONSTITUTION:A case 101 for housing a liq. crystal panel 104 is integrated with a power source from an external circuit and a connector 102 for receiving inlet and outlet signals. The power source and input-output terminal of the panel 104 and the terminal of the connector 102 are pressure-welded through an anisotropic conductive rubber 103. Namely, a plate 105 for pressing the rubber 103 is fixed to the case 101 by a springy metallic clip 106. Consequently, the panel 104 and the connector 102 are connected only by press-clamping the rubber 103 with one end of the terminal of the connector 102 and the terminal of the panel 104.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for a liquid crystal display device.

[0002]

2. Description of the Related Art Conventional liquid crystal panel modules have been manufactured by various methods, of which typical ones are shown below.

1) A flexible printed circuit board (hereinafter referred to as FPC) for connecting an external circuit is connected to an input / output terminal of a liquid crystal panel with an anisotropic conductive resin, which is housed in a resin or metal case to form a module. .

2) A liquid crystal panel is fixed to a rigid board on which an electric circuit pattern is formed, and the input / output terminals of the panel and the terminals of the rigid board are connected by wire bonding. In addition, an F for external circuit connection is attached to the board.
PC or flexible flat cable (hereinafter FF
It is referred to as C) and is connected by solder or the like to form a module. At this time, the rigid board also serves as a case.

[0005]

However, the prior art has the following problems.

1) In order to make a module, taking a wire bonding method as an example, a die attaching step for fixing a panel to a rigid board, a wire bonding step for connecting a panel terminal and a board terminal, and a wire protecting step There are at least four steps, a molding step of applying the resin and a step of soldering the FPC to the rigid board, and a dedicated mounting line must be drawn. Also,
If a defective panel is found after mounting, the entire module must be discarded, leading to an increase in F cost.

2) In a device equipped with a liquid crystal panel module, the positional relationship between the liquid crystal panel module and an external circuit is determined by the length of the FPC or FFC. Alternatively, modules having different FFC lengths must be manufactured. This complicates the manufacturing and inventory management of the module and leads to an increase in manufacturing cost. In addition, the manufacturer is FPC and FF
If the length of C is unified, the user is restricted in designing the device in which the panel module is mounted.

The present invention solves such a problem, and an object of the present invention is to provide a liquid crystal panel module which has a low mounting cost and is not restricted by the design on the user side.

[0009]

In a liquid crystal panel module of the present invention, a case for accommodating the liquid crystal panel is integrated with a connector for receiving power and input / output signals from an external circuit. The power supply and input / output terminals and the terminals of the connector are mechanically pressure-contacted via an anisotropic conductive material.

[0010]

According to the above configuration of the present invention, the liquid crystal panel and the connector can be formed by sandwiching and pressing the anisotropic conductive material between one end of the connector terminal and the liquid crystal panel terminal which are integrated in the case for housing the liquid crystal panel. Can be connected.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a sectional view showing an outline of a mounting structure of the present invention. A case (hereinafter abbreviated as case) 101 for housing a liquid crystal panel with an integrated connector
A liquid crystal panel 104 is connected to the connector terminal 102 of FIG. Further, the plate 105 for uniformly pressing the anisotropic conductive rubber is the case 1.
It is fixed to 01 by a metal clip 106 having a spring property. At this time, the terminals of the connector and the terminals of the liquid crystal panel correspond one to one, and the minimum pitch between the terminals was 0.5 mm. The connector is for FPC, and the connection structure on the FPC side is the same as that which is generally commercially available. The anisotropic conductive rubber used was a type in which thin metal wires were embedded in silicone rubber. At this time, the pressure on the anisotropic conductive rubber was 2 kg / cm ² . Here, any method may be used to fix the pressure plate 105 made of anisotropic conductive rubber without sticking to the above method. For example, if the case is resin, thermal caulking may be performed.

(Embodiment 2) In the structure of FIG. 1, as the anisotropic conductive rubber 103, one in which conductive layers and insulating layers are alternately laminated is used. Here, the stacking pitch is 0.03 〓, but any stacking pitch corresponding to the terminal pitch may be used. At this time, the pressure on the anisotropic conductive rubber is 3 kg /
It was cm ² .

(Embodiment 3) FIG. 2 is an enlarged view of a contact portion between a liquid crystal panel terminal and a connector terminal. In the structure of FIG. 1, as shown in FIG. 2, the connector-side terminal 203 is made to have a spring property, and the anisotropic conductive sheet 202 is pressed against the terminal 201 of the liquid crystal panel. The anisotropic conductive sheet is a silicone resin sheet in which conductive particles 204 are dispersed,
This time, nickel particles were used as conductive particles. The pressure at this time was 200 g per terminal.

Example 4 As shown in FIG. 2, as the anisotropic conductive sheet 202, a silicon sheet in which carbon-based conductive fibers are oriented in the thickness direction instead of the conductive particles 204 is used. The pressure applied was 6 kg / cm ² . Metallic fibers may be used as the conductive fibers.

If the conductive sheet is made of an elastic material such as silicone rubber, the connector terminal 203 need not have a spring property as shown in FIG. 2, and the connector terminal 1 as shown in FIG.
The shape of 02 may be sufficient.

[0017]

According to the present invention, a connector for receiving a power source and an input or output signal (a signal from the liquid crystal panel side is a monitor signal or the like) from an external circuit is integrated in the case for accommodating the liquid crystal panel. The power and input / output terminals of the panel and the terminals of the connector are mechanically pressure-contacted via an anisotropic conductive material,
It has the following effects. The panel can be installed in the case very easily by the throw-in method, and the mounting cost can be reduced. Since the defective liquid crystal panel can be replaced, the F cost can be reduced. Since the module is completed in one process, there is no need to draw a large-scale mounting line, and capital investment can be suppressed.
By making the connector for FPC, the user can use F
It became possible to set the length of the PC and realize a liquid crystal panel module that is not restricted by the design of the user side. As a liquid crystal panel module maker, inventory management became easier and the mounting cost was reduced.

[Brief description of drawings]

FIG. 1 is a sectional view showing an outline of a mounting structure of the present invention.

FIG. 2 is an enlarged view of a contact portion between a liquid crystal panel terminal and a connector terminal of the mounting structure of the present invention.

[Explanation of symbols]

 101 Case 102 Connector Terminal 103 Anisotropic Conductive Rubber 104 Liquid Crystal Panel 105 Plate 106 Metal Clip 201 Liquid Crystal Panel Terminal 202 Anisotropic Conductive Sheet 203 Connector Terminal 204 Conductive Particles

Claims (3)

[Claims] 1. A case for accommodating a liquid crystal panel is integrated with a connector for receiving power and input / output signals from an external circuit, and the power and input / output terminals of the panel and the terminals of the connector are integrated. A mounting structure for a liquid crystal panel module, which is mechanically pressure-contacted via an anisotropic conductive material. 2. The liquid crystal panel is a driver built-in type liquid crystal panel in which a driver for driving liquid crystal and a pixel switching element on at least one of the X side and the Y side are built on the same substrate. Item 1. A mounting structure for a liquid crystal panel module according to item 1. 3. The liquid crystal panel module mounting structure according to claim 1, wherein the liquid crystal panel is a chip-on-glass liquid crystal panel having a liquid crystal driving IC mounted thereon.