Liquid crystal display device

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Technical field to which the invention belongs]

The present invention relates to a liquid crystal display device.

【0002】

[Conventional technology]

A basic schematic configuration of a conventional liquid crystal display device will be described with reference to FIGS. 4 or 5. As shown in FIG. 4, in the conventional liquid crystal display device, the liquid crystal is enclosed in a closed space formed between the array substrate 1 and the common substrate 5 arranged in a facing state. The array substrate 1 is provided with a source bus 3, a gate bus 4, an external extraction terminal group 5 on the source bus 3 side, an external extraction terminal group 6 on the gate bus side, a thin film transistor (TFT), a pixel electrode, etc. (not shown). It has an array pattern to do. Then, the external take-out terminal group 5 on the source bus 3 side is separately arranged at one end 1a and the other end 1b of the array board 1, and the individual terminals 5a forming the terminal group 5 are arranged. The terminal group on the one end 1a side and the terminal group on the other end 1b side of the array substrate 1 are alternately distributed.

【0003】

In such a conventional liquid crystal display device, the terminal arrangement pitch P is wider than when all the terminals forming the external take-out terminal group 5 on the source bus side are arranged in a row. Therefore, as shown in FIG. 5, it becomes easy to connect each terminal 8a of the one-end side connection terminal row 8 provided at one end of the tab (TAB: Tape automated bonding) 7. In FIG. 5, 9 indicates the other end side connection terminal row provided at the other end of the tab 7, 9a indicates the individual terminals forming the other end side connection terminal row 9, and 10 indicates the IC. ..

【0004】

On the other hand, when high resolution is required for liquid crystal display devices as in recent years, it is particularly required to form the source bus 3 at a higher density. Therefore, even if the external take-out terminal group 5 on the source bus side is alternately distributed to the terminal row on the one end 1a side and the terminal row on the other end 1b side of the array substrate 1 as described in FIG. The terminal arrangement pitch P of each terminal row becomes extremely small. On the other hand, the individual terminals 8a forming the one-end side connection terminal row 8 of the tab 7 shown in FIG. 5 are formed by etching the copper foil, so that the arrangement pitch is limited to be small. It is impossible to make it smaller than the limit.

【0005】

By the way, in Japanese Patent Application Laid-Open No. 60-39617, the external extraction terminal group of the liquid crystal display device is divided into two terminal rows, and two terminals adjacent to each other belong to different rows to form an inner terminal row. A technique for expanding the arrangement pitch of terminals belonging to the same terminal row is disclosed by arranging leader wires connected to the individual terminals forming the outer terminal row between the individual terminals. Further, in Japanese Patent No. 3010800, in a liquid crystal display device, leader wires connecting to individual terminals forming a terminal row are alternately arranged on the front side and the back side of the substrate so as to be formed on the same surface of the substrate. A technique for expanding the pitch between the leader lines to be formed is disclosed.

【0006】

[Problems to be Solved by the Invention]

However, in the technique of Japanese Patent Application Laid-Open No. 60-39617, since the terminal rows are arranged in two rows at the same end on the same surface of the substrate, the terminal row forming region is increased as compared with the case where the terminal rows are one row. However, there is a problem that the size of the liquid crystal display device becomes large. Further, in the technique of Japanese Patent No. 3010800, although the pitch between the leader wires on the same surface of the substrate is widened, the terminal arrangement pitch of the individual terminals forming the external take-out terminal group is not widened. There is a problem that it is not possible to cope with the high resolution of the liquid crystal display device as in the case.

【0007】

The present invention has been made in view of the above problems, and an object of the present invention is to provide a liquid crystal display device capable of corresponding to high resolution without causing an increase in size.

【0008】

[Means for solving problems]

In the liquid crystal display device according to the present invention, the external take-out terminal group formed on the front side of the substrate is divided into a first terminal row located inside and a second terminal row located outside the first terminal row. Moreover, the adjacent terminals of the individual terminals forming the external take-out terminal group are arranged so as not to belong to the same row. Therefore, as in the case of the technique of JP-A-60-39617 described above, the arrangement pitch of the terminals belonging to the same terminal row is widened, and therefore, a liquid crystal display device provided with a high-density source bus. Even so, each of the individual terminals forming the one-end connection terminal row of the tab is divided into individual terminals belonging to the same terminal row without increasing the density of the arrangement pitch of the individual terminals. It will be possible to connect without difficulty.

【0009】

Further, in the present invention, the substrate is folded back to the back side at a position between the first terminal row and the second terminal row, and the individual terminals forming the first terminal row are provided with the first tab. The individual connection terminals forming the one-end side connection terminal row provided at one end are connected separately, and the individual terminals forming the second terminal row are connected to the second tab separate from the first tab. The individual connection terminals forming the one-end side connection terminal row provided at one end of the are connected separately. When this configuration is adopted, the first terminal row and the second terminal row are arranged in an overlapping manner, so that the terminal row having only one row is formed with the width of the area forming the terminal row. It becomes possible to suppress the size as much as the case, which helps to avoid the enlargement of the liquid crystal display device.

【0010】

In the present invention, it is possible to adopt a configuration in which the external extraction terminal group is a set of a large number of signal voltage input terminals drawn from the source bus forming the array pattern, and according to this, the beginning. It becomes possible to easily cope with the increase in resolution of the recent liquid crystal display device described in the above.

【0011】

In the present invention, in a state where the connection terminal row forming region of the second tab is folded back to the front side of the second tab, the individual connection terminals forming the connection terminal row form the second terminal row. By connecting to each of the terminals separately, the first tab and the second tab are arranged so that the front and back sides are in the same direction, and the other end side connection terminal row provided at the other end of the first tab and the first tab. It is possible to adopt a configuration in which the other end side connection terminal row provided at the other end of the two tabs is separately connected to the front and back terminal rows of the wiring board. According to this, the first tab and the second tab can be connected to the board in the same state.

【0012】

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 is a schematic plan view showing the initial shape of the array substrate 1 of the liquid crystal display device according to the present invention, FIG. 2 is a schematic perspective view of a main part of the liquid crystal display device, and FIG. 3 is a main part of the liquid crystal display device. It is a side view.

【0013】

As shown in FIG. 1, in this liquid crystal display device, the liquid crystal is enclosed in a closed space formed between the array substrate 1 and the common substrate 5 arranged in a facing state, and the array substrate 1 has a source. It is equipped with an array pattern that includes a bus 3, a gate bus 4, an external extraction terminal group 5 on the source bus 3 side, an external extraction terminal group 6 on the gate bus side, a thin film transistor (TFT), a pixel electrode, etc. (not shown). Point, the external take-out terminal group 5 on the source bus 3 side is separately arranged at one end 1a and the other end 1b of the array board 1, and the individual terminals 5a forming the terminal group 5 are arranged. The points that the terminal group on the one end 1a side and the terminal group on the other end 1b side of the array substrate 1 are alternately distributed are the same as those described in FIG. The external extraction terminal group 5 is a set of a large number of signal voltage input terminals drawn from the source bus 3 forming the array pattern.

【0014】

In the array substrate 1 in the initial state adopted in this embodiment, as shown in FIG. 1, the source bus 3 side external extraction formed on each of the front end 1a and the other end 1b of the array substrate 1 is taken out. The terminal groups 5 and 5 are divided into a first terminal row 51 located inside and a second terminal row 52 located outside the first terminal row 51, and further, the external take-out terminal group 5 is formed. Adjacent terminals 5a are arranged so that they do not belong to the same row. In other words, in a large number of terminals 5a arranged side by side, one of the two adjacent terminals 5a and 5a belongs to the first terminal row 51 and the other belongs to the second terminal row 52. Therefore, the terminal arrangement pitch P1 of the terminal 5a belonging to the first terminal row 51 and the terminal arrangement pitch P2 of the terminal 5a belonging to the second terminal row 52 are set to be twice the terminal arrangement pitch described in FIG. 4 at the maximum. be able to. Therefore, in the arrangement pitch of each connection terminal 8a of the connection terminal row 8 on one end side of the tab 7 described with reference to FIG. 5, the terminal arrangement pitch P1 of the terminal 5a belonging to the first terminal row 51 and the terminal 5a belonging to the second terminal row 52 It becomes easy to match the terminal arrangement pitch P2 of.

【0015】

As shown in FIGS. 2 and 3, in the liquid crystal display device of this embodiment, the array substrate 1 is folded back at a position between the first terminal row 51 and the second terminal row 52. Then, the individual terminals 5a forming the first terminal row 51 form the one-end side connection terminal row 8 (see FIG. 5, the same applies hereinafter) provided at one end of the first tab 71. Connection terminals 8a (see FIG. 5, the same applies hereinafter) are individually connected to each terminal 5a forming the second terminal row 52, and are provided at one end of the second tab 72 separate from the first tab 71. The individual connection terminals 8a (see FIG. 5, the same applies hereinafter) forming the one-end connection terminal row 8 (see FIG. 5, the same applies hereinafter) are connected separately. Although FIG. 2 and FIG. 3 do not show the connection terminal row 8 on each one end side of the first tab 71 and the second tab 72 and the connection terminal 8a thereof, the first tab 71 and the second tab 72 have FIG. 5 The same tab 7 described in is used. Therefore, the connection state between the individual terminals 5a of the first terminal row 51 and the individual connection terminals 8a forming the one-end connection terminal row 8 of the first tab 71, and the individual terminals 5a of the second terminal row 52 The connection state between the two and the individual connection terminals 8a forming the one-end connection terminal row 8 of the second tab 72 can be inferred from FIG.

【0016】

Further, the connection terminal row forming region 73 of the second tab 72 is folded back to the front side of the second tab 72, and the individual connection terminals 8a of the one end side connection terminal row 8 formed in the region 73 are described above. They are separately connected to the individual terminals 5a forming the second terminal row 52. If this configuration is adopted, the first tab 71 and the second tab 72 are arranged so that the front and back sides are in the same direction as shown in FIG. Therefore, the other end side connection terminal row 9 provided at the other end of the first tab 71 (see FIG. 5, the same applies hereinafter) and the other end side connection terminal row 9 provided at the other end of the second tab 72 (see FIG. 5, the same applies hereinafter). (See FIG. 5, the same applies hereinafter) can be separately connected to the terminal rows on the front and back of the wiring board 100 shown in FIGS. 2 and 3.

【0017】

The liquid crystal display devices of FIGS. 2 and 3 can be manufactured by, for example, the following procedure. That is, one end of each of the first tab 71 and the second tab 72 shown in FIGS. 2 and 3 in each of the first terminal row 51 and the second terminal row 52 of the array substrate 1 before folding back shown in FIG. After connecting the side connection terminal rows, the array board 1 is folded back at the position between the first terminal row 51 and the second terminal row 52, and then the connection terminal row formation region 73 of the second tab 72 is seconded. Fold back to the front side of tab 72. Then, the other end side connection terminal row 9 of the first tab 71 and the other end side connection terminal row 9 of the second tab 72 are separately connected to the front and back terminal rows of the wiring board 100.

【0018】

[Effect of the invention]

As described above, according to the present invention, even in a liquid crystal display device provided with a high-density source bus, those connection terminals can be connected without increasing the density of the arrangement pitch of the tab-side connection terminals. It is possible to connect to individual terminals belonging to the same terminal row on the array board side without difficulty. Therefore, a high-resolution liquid crystal display can be inexpensively manufactured using the same tabs as in the conventional case. Further, in the present invention, the substrate is folded back to the back side at the position between the first terminal row and the second terminal row, and the individual terminals forming the first terminal row are individually attached to the first tab. The connection terminals of the second tab are connected separately, and the individual connection terminals of the second tab are individually connected to the individual terminals forming the second terminal row, so the first terminal row And the width of the area forming the second terminal row can be suppressed to the same level as when only one row of terminal rows is formed, which avoids the enlargement of the liquid crystal display device. Useful for.

[Simple explanation of drawings]

[Figure 1]

It is a schematic plan view which showed the initial shape of the array substrate of the liquid crystal display device which concerns on this invention.

[Figure 2]

It is a schematic perspective view of the main part of the liquid crystal display device.

[Fig. 3]

It is a side view of the main part of the liquid crystal display device.

[Fig. 4]

It is a schematic plan view of the array substrate used in the conventional liquid crystal display device.

[Fig. 5]

It is a schematic enlarged view which showed the main part of the conventional liquid crystal display device.

[Explanation of symbols]

1 board (array board) 3 source bus 5 External take-out terminal group 5a terminal 8 One end side connection terminal row 8a connection terminal 51 Terminal 1 row 52 2nd terminal row 71 1st tab 72 2nd tab 73 Connection terminal row formation area