JPH11218778A - Method for packaging liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal display(LCD) device packaging method capable of preventing the occurrence of misconnection in connecting a signal driving circuit substrate to a control circuit substrate through a flexible wiring board without increasing cost and the sorts of parts to be used. SOLUTION: Connectors of different types (a male type and a female type) are used for a signal driving circuit substrate side connector 6 and a control circuit substrate side connector 7 to be built in a flexible wiring board 3 for electrically connecting a signal driving circuit substrate 1 to a control circuit substrate 2. Since both the connectors 6, 7 built in the wiring board 3 for electrically connecting the substrate 1 to the substrate 2 are constituted as mutually engaged and electrically connected pair structure (e.g. a male type and a female type), the occurrence of misconnection between both the substrates 1, 2 through the wiring board 3 can easily be prevented without increasing cost and the sorts of parts to be used, the assembling work of the wiring board 3 can easily be executed and the cost of a liquid crystal display device can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mounting a liquid crystal display device, and more particularly to a method for mounting a liquid crystal display device in connecting a drive circuit board and a control circuit board.

[0002]

2. Description of the Related Art FIGS. 4 and 5 are plan views showing a conventional liquid crystal display device. In the liquid crystal display device shown in FIG. 4, a Tape Carrier P having a driving IC 12 for scanning is used.
scanning drive circuit board 11 to which a plurality of packages (hereinafter referred to as TCP) 13 are connected, and signal drive IC 1
Each of the signal drive circuit boards 1 to which a plurality of TCPs 15 having a plurality of TCPs 4 are connected is provided on one side of the liquid crystal display panel 16 (one side of the rectangular liquid crystal display panel 16). In the liquid crystal display device shown in FIG. 5, an upper signal driving circuit in which a plurality of TCPs 15 having signal driving ICs 14 are connected to both sides of the liquid crystal display panel 16 (two opposing sides of the rectangular liquid crystal display panel 16). A substrate 1a and a lower signal drive circuit substrate 1b are provided. In a liquid crystal display device, a TCP having a signal driving IC is bent and mounted as the frame of the module becomes narrower, and the electrical connection between the signal driving circuit board and the control circuit board is made of a flexible wiring. A method using a plate is used.

FIGS. 6, 7 and 8 are views showing a connection structure between a signal drive circuit board 1 and a control circuit board 2 via a flexible wiring board 3. FIG. In FIG. 6, a signal drive circuit board side terminal 17 and a control circuit board side terminal 18 are provided as soldering terminal portions at both ends of the flexible wiring board 3, respectively. 2 shows a method of electrically connecting the signal drive circuit board 1 and the control circuit board 2 by soldering them. In FIG. 7, the flexible wiring board 3
The signal drive circuit board side terminal 17 and the control circuit board side connector 19 are provided, the signal drive circuit board side terminal 17 is soldered to the signal drive circuit board 1, and the control circuit board side connector 19 is connected to the control circuit board. 2 shows a method of electrically connecting the signal drive circuit board 1 and the control circuit board 2 via the flexible wiring board 3 by fitting and connecting to the connector 20 provided in the connector 2. In FIG. 8, a signal drive circuit board side connector 21 and a control circuit board side connector 19 are provided at both ends of the flexible wiring board 3, and the signal drive circuit board side connector 21 is provided on the signal drive circuit board 1. Connector 22
The signal drive circuit board 1 and the control circuit board 2 are electrically connected via the flexible wiring board 3 by fitting and connecting the connector 20 provided on the control circuit board 2 to the control circuit board side connector 19. The method of connecting to is shown.

[0004]

The electrical connection between the signal drive circuit board 1 and the control circuit board 2 in the conventional liquid crystal display device is configured as described above. As shown in FIGS. Solder terminals (signal drive circuit board side terminal 17 and control circuit board side terminal 1) are attached to flexible wiring board 3.
8), when the flexible wiring board 3 is connected to the signal driving circuit board 1 and the flexible wiring board 3 and the control circuit board 2 by soldering, it is difficult to reduce the pitch of the terminals. There is a problem that the area of the circuit board (the signal drive circuit board 1 and the control circuit board 2) becomes large. When the flexible wiring board 3 and the control circuit board 2 are connected by soldering,
When the control circuit board 2 is defective, only the control circuit board 2 cannot be replaced and reworked, so that there is a problem that the yield is reduced and the cost is increased.

[0005] Further, as shown in FIG.
When both the signal drive circuit board 1 and the flexible wiring board 3 and the control circuit board 2 are connected using a connector, the flexible wiring board 3 is connected to the signal drive circuit board 1 and the control circuit board 2. When the external shape and the number of pins of the signal drive circuit board side connector 21 and the control circuit board side connector 19 provided on the flexible wiring board 3 are the same, the signal drive circuit Since there is a possibility of erroneous connection such as connecting the connector 20 on the control circuit board 2 to the board side connector 21 and the connector 22 on the signal drive circuit board 1 to the control circuit board side connector 19, as shown in FIG. Forming a mark 24 for identifying the signal drive circuit board side connector 21 and the control circuit board side connector 19, or using connectors of structurally different types (for example, 21 and 25) as shown in FIG. Drive times For the board 1 and the control circuit board 2, it is necessary to take measures to prevent erroneous connection, such as by using a connector having a structure that can correspond to the connector 21 or 25, thereby increasing costs or increasing the number of types of parts to be used, thereby increasing the cost of direct materials. There was such a problem.

As shown in FIG. 11, an upper signal drive circuit board 1a and a lower signal drive circuit board 1b are arranged on both sides of a liquid crystal display panel (not shown), and an upper flexible wiring board 3a is provided. Alternatively, when connected to the control circuit board 2 via the lower flexible wiring board 3b, the signal drive circuit board side connector 21a provided on the upper flexible wiring board 3a and the lower flexible wiring board 3b. And 21b, and the outer shape and the number of pins of the control circuit board side connectors 19a and 19b, the number of pins, and the wiring pattern formed on the upper flexible wiring board 3a and the lower flexible wiring board 3b. By making the lower flexible wiring board 3a also serve as the lower flexible wiring board 3a, the number of members can be reduced, but the upper flexible wiring board 3a can be reduced.
And a lower flexible wiring board 3b having the same shape and the same number of pins (sometimes referred to as a “plug” due to its structure, but referred to as a “male” as a general name here) type signal drive Circuit board side connector 21a and control circuit board side connector 1
9a is provided, and the signal drive circuit board 1 and the control circuit board 2 are female type connectors (there may be structurally referred to as "recessive", but here are generally referred to as "female") type connectors. 22a and 20a, the signal drive circuit board side connector 21a and the connector 20a on the control circuit board 2, the control circuit board side connector 19a and the connector 22a on the signal drive circuit board 1
As shown in FIG. 9, the signal drive circuit board connector 21 and the control circuit board connector 19 are connected in the same manner as in the case where the signal drive circuit board 1 is arranged on one side. In order to prevent erroneous connection, it is necessary to form a mark 24 for identifying the connection or to use connectors of different structures (for example, 21 and 25) as shown in FIG. There were problems such as an increase in the cost of direct materials.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. When connecting a signal drive circuit board and a control circuit board via a flexible wiring board, the present invention provides a flexible wiring board. Incorrect connection, such as connecting the signal drive circuit board connector on the control board and the connector on the control circuit board, and the control circuit board connector on the signal drive circuit board, increases the cost and increases the types of parts used. It is an object of the present invention to provide a method for mounting a liquid crystal display device, which can reduce the cost of the liquid crystal display device by preventing such a problem.

[0008]

According to a method of mounting a liquid crystal display device according to the present invention, a signal drive circuit board disposed around a liquid crystal display panel is connected to a control circuit board via an independent flexible wiring board. In the method for mounting an electrically connected liquid crystal display device, one and the other of a pair of connectors that are fitted and electrically connected to each other are provided on the flexible wiring board, respectively, and the signal driving circuit board is provided. Is provided with the other or one connector fitted with one or the other connector of the flexible wiring board, and the control circuit board is provided with one or other connector fitted with the other or one connector of the flexible wiring board The other connector is provided, and the flexible wiring board, the signal drive circuit board, and the control circuit board are each connected only via the connector. The pair of connectors is a male type connector and a female type connector. In addition, signal drive circuit boards are respectively arranged on two sides of the liquid crystal display panel, and each signal drive circuit board is electrically connected to the control circuit board via an independent flexible wiring board. The flexible wiring board has the same configuration and arrangement of the respective connectors. Also,
The scanning drive circuit is formed on the control circuit board.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, a method of mounting a liquid crystal display device according to an embodiment of the present invention will be described with reference to the drawings. FIGS. 1A and 1B show a structure of a connecting portion between a signal driving circuit board and a control circuit board of a liquid crystal display device according to a first embodiment of the present invention via a flexible wiring board. FIG. b) is a sectional view. In the figure, 1 is a signal drive circuit board, 2 is a control circuit board, 3 is a flexible wiring board, 4
Is a female connector provided on the signal drive circuit board 1, 5 is a male connector provided on the control circuit board 2, and 6 is a male signal drive circuit provided on the flexible wiring board 3. The board side connector 7 is a female control circuit board side connector provided on the flexible wiring board 3.

In the electrical connection between the signal drive circuit board 1 and the control circuit board 2 using the flexible wiring board 3 according to the present embodiment, the flexible wiring board 3 has a male signal drive. A circuit board side connector 6 and a female control circuit board side connector 7 are provided. The male type signal drive circuit board side connector 6 includes a female type connector 4 provided on the signal drive circuit board 1. The male type connector 5 provided on the control circuit board 2 is connected to the female type control circuit board side connector 7, and the male type connector provided on the control circuit board 2 is provided to the male type signal drive circuit board side connector 6. It is structurally impossible to connect the female connector 4 provided on the signal drive circuit board 1 to the female control circuit board side connector 7 of the female connector 5.

According to the present invention, the signal drive circuit board 1
The type of the signal drive circuit board side connector 6 and the control circuit board side connector 7 provided on the flexible wiring board 3 for electrically connecting the control circuit board 2 to the control circuit board 2 are of a male type and a female type. An erroneous connection between the signal driving circuit board 1 and the control circuit board 2 via the flexible wiring board 3 can be prevented.

Embodiment 2 FIG. FIG. 2 is a plan view showing a structure of a connecting portion between a signal driving circuit board and a control circuit board of a liquid crystal display device according to a second embodiment of the present invention via a flexible wiring board. In the liquid crystal display device according to the present embodiment, signal driving circuit boards are arranged on both sides (two opposing sides of a rectangular liquid crystal display panel) of a liquid crystal display panel (not shown). In the drawing, 1a is a drive circuit board for the upper signal,
1b is a lower signal drive circuit board, 2 is a control circuit board, 3
a is an upper flexible wiring board, 3b is a lower flexible wiring board, 4a
Is a female connector provided on the upper signal drive circuit board 1a; 4b is a male connector provided on the lower signal drive circuit board 1b; 5a is provided on the control circuit board 2; A male connector connected to the circuit board 1a, 5b is provided on the control circuit board 2, and a female connector connected to the lower signal drive circuit board 1b, 6a is provided on the upper flexible wiring board 3a. 6b is a female-type signal drive circuit board side connector provided on the lower flexible wiring board 3b, and 7a is an upper flexible wiring board 3a.
Female type control circuit board side connector provided in
b is a male type control circuit board side connector provided on the lower flexible wiring board 3b. The upper flexible wiring board 3a and the lower flexible wiring board 3b according to the present embodiment
The pin assignment and the wiring pattern of the connector are configured so that the upper flexible wiring board 3a can be slid downward as it is and used as the lower flexible wiring board 3b.

Upper flexible wiring board 3a according to the present embodiment
Signal drive circuit board 1a and control circuit board 2 using
Electrical connection between the upper flexible wiring board 3a and the lower flexible wiring board 3b and the control circuit board 2 using the lower flexible wiring board 3b. Different connectors of a male type and a female type are provided on the flexible wiring board 3b, respectively, and only the female type connector is connected to the male type connector. Therefore, the same effect as in the first embodiment is obtained. can get.

Embodiment 3 In the second embodiment, the upper flexible wiring board 3a can be slid downward as it is to be used as the lower flexible wiring board 3b. However, the signal driving circuit board, the control circuit board, and the like can be used. For convenience in designing the wiring pattern of the flexible wiring board, as shown in FIG. 3, one of the upper flexible wiring board 3a and the lower flexible wiring board 3b may be provided in an inverted form. . In this case, the upper flexible wiring board 3a can be used as the lower flexible wiring board 3b by rotating the upper flexible wiring board 3a by 180 degrees and sliding it downward, and the same effect as in the first embodiment can be obtained.

Embodiment 4 Embodiments 1, 2, and 3
In this embodiment, the signal drive circuit boards 1 are arranged on one side or both sides of the liquid crystal panel, and each signal drive circuit board 1 is electrically connected to the control circuit board 2 via an independent flexible wiring board 3. Although the liquid crystal display device having the configuration has been described, the circuit board on which the control circuit and the scanning drive circuit are both formed is electrically connected to the signal drive circuit board via an independent flexible wiring board. In the liquid crystal display device having the same configuration, the signal drive circuit board side connector and the circuit board side connector provided on the flexible wiring board are of a male type and a female type, respectively. The effect is obtained.

[0016]

As described above, according to the present invention, a signal drive circuit board side connector provided on a flexible wiring board for electrically connecting a signal drive circuit board and a control circuit board is provided. By forming a pair of structures (for example, a male type and a female type) in which the circuit board side connectors are fitted and electrically connected to each other, between the signal drive circuit board and the control circuit board via the flexible wiring board. It is possible to easily prevent erroneous connection of the liquid crystal display device without increasing the cost or increasing the types of components to be used, thereby facilitating the assembling work of the flexible wiring board and reducing the cost of the liquid crystal display device.

[Brief description of the drawings]

FIGS. 1A and 1B are a plan view and a cross-sectional view illustrating a structure of a connection portion between a signal drive circuit board and a control circuit board of a liquid crystal display device according to a first embodiment of the present invention via a flexible wiring board.

FIG. 2 is a plan view showing a structure of a connection portion between a signal driving circuit board and a control circuit board of a liquid crystal display device according to a second embodiment of the present invention via a flexible wiring board.

FIG. 3 is a plan view showing a structure of a connection portion between a signal driving circuit board and a control circuit board of a liquid crystal display device according to a third embodiment of the present invention via a flexible wiring board.

FIG. 4 is a plan view showing a conventional liquid crystal display device of this type.

FIG. 5 is a plan view showing another conventional liquid crystal display device.

FIG. 6 is a plan view showing a structure of a connection portion between a signal drive circuit board and a control circuit board of a conventional liquid crystal display device via a flexible wiring board.

7A and 7B are a plan view and a cross-sectional view illustrating a structure of a connection portion between a signal drive circuit board and a control circuit board of another conventional liquid crystal display device via a flexible wiring board.

8A and 8B are a plan view and a cross-sectional view illustrating a structure of a connection portion between a signal drive circuit board and a control circuit board of another conventional liquid crystal display device via a flexible wiring board.

FIG. 9 is a cross-sectional view and a plan view of a conventional flexible wiring board.

FIG. 10 is a cross-sectional view and a plan view of another conventional flexible wiring board.

FIG. 11 is a plan view showing a structure of a connection portion between a signal drive circuit board and a control circuit board of another conventional liquid crystal display device via a flexible wiring board.

[Explanation of symbols]

Reference Signs List 1 signal drive circuit board, 1a upper signal drive circuit board, 1b lower signal drive circuit board, 2 control circuit board, 3 flexible wiring board, 3a upper flexible wiring board, 3b
Lower flexible wiring board, 4, 4a, 4b, 5, 5a, 5b
Connector, 6, 6a, 6b Connector for signal drive circuit board, 7, 7a, 7b Connector for control circuit board.

Claims (4)

[Claims] 1. A method for mounting a liquid crystal display device in which a signal drive circuit board disposed around a liquid crystal display panel is electrically connected to a control circuit board via an independent flexible wiring board. The flexible wiring board is provided with one and the other of a pair of connectors fitted and electrically connected to each other, and the signal drive circuit board is provided with one or the other connector of the flexible wiring board. The other or one connector to be fitted is provided, and the control circuit board is provided with one or another connector to be fitted to the other or one connector of the flexible wiring board. A method for mounting a liquid crystal display device, wherein a wiring board, a signal drive circuit board, and a control circuit board are respectively connected only via connectors. 2. The method according to claim 1, wherein the pair of connectors are a male type connector and a female type connector. 3. A signal drive circuit board is disposed on each of two sides of a liquid crystal display panel, and each of the signal drive circuit boards is electrically connected to a control circuit board via an independent flexible wiring board. 3. The method of mounting a liquid crystal display device according to claim 1, wherein each of the flexible wiring boards has the same configuration and arrangement of respective connectors. 4. The method for mounting a liquid crystal display device according to claim 1, wherein a scanning drive circuit is formed on the control circuit board.