JP3118450B2 - Liquid crystal display using flexible circuit board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device used for a display device of an electronic device for AV, a display device of an OA terminal or an advertisement display device, and more particularly to a circuit board for supplying signals to a liquid crystal panel. About.

[0002]

2. Description of the Related Art A flexible circuit board is used as a circuit board for supplying signals to a liquid crystal panel of a liquid crystal display device. JP-A-4-115228, JP-B-8-2
JP-A-8395 and JP-A-6-258661 disclose a liquid crystal display device using a flexible circuit board.

[0003] In particular, Japanese Patent Laid-Open Publication No.
A liquid crystal display device using the flexible circuit board shown in FIGS. 24 and 25 is disclosed.

FIG. 24A is a top view of a liquid crystal display device using a flexible circuit board.
(B) is an enlarged view of the flexible circuit board. FIG. 25A is a top view of a liquid crystal display device using a flexible circuit board, and FIG.
FIG. 2 is an enlarged view of the flexible circuit board.

The liquid crystal display device shown in FIG. 24A has a data-side flexible board 203 and a data-side circuit board 20.
4, scanning-side flexible board 205, scanning-side circuit board 2
06 and a driving IC 207.

[0006] The data-side flexible substrate 203 shown in FIG. 24B has an input terminal 236 and an output terminal 231 sandwiching the driving IC 207. The input terminal 236 receives a signal from the data-side circuit board 204. Output terminal 23
1 outputs a signal to the liquid crystal display panel.

The flow of signals in the liquid crystal display device is as follows. On the scanning side, an external signal is transmitted to the driving IC 207 via the scanning side circuit board 206 and the scanning side flexible circuit board 205.
And outputs the scanning signal generated by the driving IC 207 to the liquid crystal display panel. At the same time, on the data side, external signals (data signal, control signal, and power supply signal) pass through the data side circuit board and the glass substrate. Driving ICs 207 for data-side flexible circuit boards arranged side by side
The display signal is output from the driving IC 207 to the liquid crystal display panel.

The liquid crystal display device shown in FIG. 25A includes a data-side flexible substrate 203, a scanning-side flexible substrate 205, and a driving IC 207. In this configuration, the internal wiring is arranged in the flexible circuit board without using the data-side circuit board and the scanning-side circuit board.

The data-side flexible substrate 203 shown in FIG. 25B has an input terminal 236 and an output terminal 231 sandwiching the driving IC 207. Flexible circuit board 20
Input terminals 236 for inputting signals to the driving ICs 207 on 3 and 205 are arranged outside the output terminals 231. That is, the input terminal 23
6 and the output terminal 231 are connected to the flexible circuit board 20.
3 and 205 are located on the long sides. When connecting the data-side flexible circuit board 203 to a liquid crystal display panel,
A connection portion with the glass electrode is provided inside the driving IC 207.

[0010] The signal flow in the liquid crystal display device is such that a signal from the outside is transmitted from the scanning side flexible circuit board 2 to the scanning side.
05 received by the driving IC 207
At the same time as outputting the scanning signal generated in 207 to the liquid crystal display panel, on the data side, external signals (data signal, control signal, and power supply signal) are output from the data-side flexible circuit board on which the glass substrate is arranged. Driving IC 20
The display signal is output from the driving IC 207 to the liquid crystal display panel.

[0011]

In the flexible circuit boards shown in FIGS. 24 (b) and 25 (b), the driving IC 2
Since the routing lines are routed from the upper and lower parts of the 07, there is a problem that the length of the flexible circuit board in the vertical direction cannot be shortened accordingly.

Further, when the data side circuit board as shown in FIG. 24 (a) has a multilayer structure for transmitting signals to a plurality of flexible circuit boards in parallel, crimping portions are scattered. For this reason, when performing crimping connection or soldering connection,
A plurality of crimping steps are required, and there is a problem that it is difficult to adjust the balance and temperature of the crimping tool.

Further, in the conventional input wiring on the liquid crystal display panel electrode, since the routing portion is provided at a position where the data side glass substrate and the scanning side glass substrate overlap, the routing between the routing lines as shown in FIG. There has been a problem that W1 becomes narrower and wiring cannot be freely arranged.

The mounting of the conventional liquid crystal display device is as follows:
The process shown in FIG. The anisotropic conductive film is attached to the liquid crystal display panel and temporarily fixed. Position the flexible circuit board on the glass terminals via the anisotropic conductive film, and temporarily press-fit. The flexible circuit board and the glass electrode are fully bonded. A circuit board having an anisotropic conductive film attached to the connection terminal;
Position and temporarily fix the input terminals of the flexible circuit board. Fully crimped flexible circuit board and circuit board.

That is, after aligning the data-side flexible circuit board at the place where the anisotropic conductive film was temporarily pressed on the liquid crystal display panel, and then fixing the data-side flexible circuit board, and then pressing the data-side flexible circuit board to the glass substrate on the circuit board side. After the input terminal side of the side flexible circuit board and the data side circuit board are aligned (temporarily fixed) with a double-sided tape or the like, they are permanently bonded and connected and fixed to the periphery of the liquid crystal display panel.

In the conventional mounting process of a liquid crystal display device, the distance between the respective crimping portions is large, which causes a problem of balance adjustment of the crimping tool and difficulty in uniformity of the temperature of the crimping surface of the tool. It is difficult to perform the crimping operation twice, and a plurality of steps are required. For this reason, the conventional liquid crystal display device has a problem that the number of mounting steps increases.

An object of the present invention is to provide a liquid crystal display device capable of making the width of the data-side glass terminal narrower.

Another object of the present invention is to provide a structure in which a drive signal output terminal of a flexible circuit board is provided outside a display IC with respect to a display section and a flexible circuit board connected to a panel is connected. Accordingly, it is an object of the present invention to provide a liquid crystal display device capable of making the entire display device a narrow frame and reducing the number of steps in manufacturing.

[0019]

[0020]

[0021]

[0022]

[0023]

[0024]

A liquid crystal display device according to the present invention comprises a first insulating tape having a pair of long sides and a pair of short sides, and a first driving tape mounted on the first insulating tape. I
C, a first input wiring terminal for receiving a data signal and a control signal sent to the first driving IC,
A first output wiring terminal for outputting a signal from the driving IC, a second output wiring terminal for outputting a part or all of the data signal and the control signal, and the first driving IC
First and second power signal terminals for supplying a voltage to
And the first input wiring terminal, the first output wiring terminal, and the second output wiring terminal are provided on one long side of the pair of long sides, A plurality of data sides each including the first power signal terminal provided on one of the short sides and the second power signal terminal provided on the other short side of the pair of short sides. A flexible circuit board, a second insulating tape having a pair of long sides and a pair of short sides, and a second insulating tape mounted on the second insulating tape.
A driving IC, a second input wiring terminal for receiving a signal used in the data-side flexible circuit board, a third output wiring terminal for outputting a signal from the second driving IC, And a fourth output wiring terminal for outputting the signal used in the flexible circuit board. The third output wiring terminal and the fourth output wiring terminal are provided on one long side of the pair of long sides. A scanning flexible circuit board provided with the second input wiring terminal on the other long side of the pair of long sides or inside the second insulating tape; and the data-side flexible circuit board. A data-side glass substrate connected to the scanning flexible circuit board; a scanning-side glass substrate facing the data-side glass substrate; a scanning-side glass substrate and the data-side glass substrate Between the scanning glass substrate and the data glass substrate to transmit a scanning signal output from the data glass substrate to the scanning glass substrate. An electrode transition,
A data signal supply wiring, a control signal wiring, and a power signal supply wiring, provided on the data-side glass substrate terminal, and the data-side glass substrate includes a data signal, a control signal, and all or part of a power signal. has a straight line for delivery to said adjacent data-side flexible circuit board, the data side Furekishibu Le circuit board, the data side moth
The glass substrate on the data side so as not to protrude from the glass substrate
The above purpose is achieved by being mounted on the above.

Further , the liquid crystal display device of the present invention has a liquid crystal display panel having a plurality of signal electrodes and a plurality of scanning electrodes opposed to each other in a matrix and having a display section, a driving IC for generating a display signal, and the display device. A liquid crystal display comprising at least one data-side flexible circuit board having an output terminal for supplying a signal to the plurality of signal electrodes, and a scanning-side flexible circuit board for supplying a scanning signal to the plurality of scanning electrodes. An apparatus, wherein the driving IC is
Is located between the output terminals of said data-side flexible circuit board and the display unit, routing of the wiring of the input terminal and said input terminal for inputting the display signal, one data-side flexible the at least The end of the driving IC closer to the circuit board extends under the driving IC to the display section of the liquid crystal display panel, thereby achieving the above object.

The data-side flexible circuit board may further include an input / output wiring terminal for inputting / outputting a signal to / from the driving IC, on a surface where the output terminal is located.

The data-side flexible circuit board further includes an input / output wiring terminal for inputting / outputting a signal to / from the drive IC, and the output terminal of the data-side flexible circuit board includes the drive IC and the input / output terminal. It may be located inside the output wiring terminal.

[0028] A cutout may be provided on a surface of the data-side flexible circuit board on which the output terminal is located.

It is preferable that the driving IC of the data-side flexible circuit board is molded with a resin, and that the resin does not protrude from the insulating film on the back surface of the data-side flexible circuit board.

The liquid crystal display panel has an electrode terminal,
An input terminal for inputting a signal to the liquid crystal display panel and a part of a lead wire connected to the input terminal may be provided on the liquid crystal display panel.

The liquid crystal display device may have an adjacent data-side flexible circuit board, and the adjacent data-side flexible circuit boards may be connected by a relay board.

Hereinafter, the operation will be described.

The flexible circuit board according to the present invention comprises: an input wiring terminal for receiving a data signal and a control signal sent to a driving IC; a first output wiring terminal for outputting a signal from the driving IC; And a second output wiring terminal for outputting a part or all of the control signal is provided along one straight line on one of the long sides. Therefore, these terminals can be collectively connected to the terminals on the data-side glass substrate. Further, since most of these terminals are provided on the long side of the flexible circuit board, the number of terminals provided on the short side of the flexible circuit board can be reduced. As a result, the length of the short side of the flexible circuit board can be reduced.

Adjustment is also easy during crimp connection. In particular, adjustment becomes easy in terms of crimping tool balance. The crimping tool balance means a balance between a tool for crimping a board and a board and a board to be crimped, and a good crimping tool balance means that a board to be crimped and a tool are uniformly contacted. If you say. When the crimping portions are scattered, it is difficult to actually adjust the tool balance when performing crimping connection or soldering connection.

Further, when a plurality of the flexible circuit boards are used and the flexible circuit boards are arranged on the edge of the data-side glass board, the data-side glass connected to the input terminal and the output terminal of the flexible circuit board is connected. The terminals of the board can be used as a part of wiring for sending a signal to an adjacent flexible circuit board. Therefore, when electrically connecting the input terminal and the output terminal of the flexible circuit board and the adjacent flexible circuit board, the terminal of the data-side glass substrate is used as a part of the wiring, and the terminal of the data-side glass substrate is used. They can be connected with straight wiring. For this reason,
There is no need to provide an extra area on the data side glass substrate in the short side direction of the flexible circuit board.

Further, since the input / output terminals of the data signal and the control signal are provided along the long side of the flexible circuit board, the short side of the flexible circuit board adjacent to the output terminal on the short side of the flexible circuit board of the liquid crystal display panel. Of the liquid crystal display device can be formed as a narrow frame.

In the flexible circuit board of the present invention, a notch is provided on the other long side of the pair of long sides. When the flexible circuit board and the data-side glass substrate are crimped, the state of the crimping can be visually confirmed.

Another flexible circuit board of the present invention has a first output wiring terminal for outputting a signal from the driving IC and a second output wiring for outputting the signal used in the data-side flexible circuit board. And a first output wiring terminal and the second output wiring terminal are provided on one of the long sides of the pair of long sides. Therefore, when the flexible circuit board is connected to the data-side glass substrate, the data-side glass substrate can be narrowed.

In the liquid crystal display device of the present invention, an electrode transfer portion of a scanning signal wiring is formed between the scanning glass substrate and the data glass substrate, and the scanning signal input from the data glass substrate is transferred to the electrode transfer glass substrate. It can be supplied to the scanning signal wiring of the scanning side glass substrate via the section. Therefore, it is not necessary to connect the scanning glass substrate and the data glass substrate with jumper lead wires. Data signal supply wiring,
The layout of the control signal wiring and the power signal supply wiring is facilitated, and the design of the liquid crystal display device of the present invention is facilitated.

When both the data-side flexible circuit board and the scanning-side flexible circuit board face in the same direction, these boards can be pressed at once. Further, a moisture-proof material can be applied on the wiring at one time.

When the data-side flexible circuit board is arranged so as to fit on the data-side glass terminals, cost reduction, reliability improvement (disconnection of input / output terminals), and improvement in vibration resistance can be achieved without a circuit board. Becomes

When the data-side flexible circuit board or the scanning-side flexible circuit board is pressed against the data-side glass terminal and the anisotropic conductive film, the data-side flexible circuit board or the scanning-side flexible circuit board can be peeled off. . Therefore, the liquid crystal display device of the present invention can be easily repaired.

In the liquid crystal display device of the present invention, an output terminal for outputting a display signal from the driving IC provided on the data-side flexible circuit board to the display section of the liquid crystal display panel is provided.
It is connected to the electrode terminal of the liquid crystal display panel so as to be located outside the driving IC with respect to the display section of the liquid crystal display panel. When connecting the flexible circuit board on the glass electrode of the liquid crystal display panel, the data-side flexible circuit board is connected outside the driving IC, so the data-side flexible circuit board is clamped more inside the panel side. To connect to the liquid crystal display panel, and the frame of the liquid crystal display device can be narrowed.

The structure of the flexible circuit board is as follows.
Since the structure is such that the input / output terminals can be switched, it can be used even when the mounting position is upside down.

Further, in the liquid crystal display device of the present invention, an input / output wiring terminal for inputting / outputting a signal to / from the driving IC on each of the flexible circuit boards is provided on the output terminal side with respect to the driving IC. By forming them on the surface, the input / output terminal portion of each signal and the output terminal to the panel can be provided in a straight line along the side of the flexible circuit board on the mounting surface, and can be connected by one final press bonding. Can be.

Adjustment is also easy during crimp connection. In particular, adjustment becomes easy in terms of crimping tool balance. If the crimping portions are scattered, it becomes difficult to adjust the balance of the tool in mounting when performing crimping connection or soldering connection.

Further, in the liquid crystal display device of the present invention, the input / output wiring terminals of the flexible circuit board can be provided at positions away from the output terminals with respect to the driving IC. By protruding the wiring terminal portion, when the circuit board is used for relaying the data-side flexible circuit board, the connection with the circuit board can be facilitated.

Further, in the liquid crystal display device of the present invention, by providing a cutout portion on the arrangement surface portion on the surface of the flexible circuit board on the output terminal side, it is possible to visually confirm the crimped state, and it is easy to manufacture. Can be achieved.

In the liquid crystal display device of the present invention, when the flexible circuit board is flattened on the back surface side, the arrangement stability can be enhanced even when the flexible circuit board is connected on a liquid crystal glass terminal.

In the liquid crystal display device according to the present invention, an input terminal for inputting a signal to the panel and a part of a lead line of the terminal are provided on the electrode terminal portion of the liquid crystal display panel, so that a line gap is provided. Can be made larger than that of a conventional line. According to the present invention, a margin can be provided between the leading wires, which is advantageous in design. Further, in the present invention, the mounting accuracy of the liquid crystal display panel and the flexible circuit board can be improved.

Further, in the liquid crystal display device of the present invention, by using a short circuit board and using a short circuit board between adjacent flexible circuit boards, the number of circuits to be manufactured can be increased. Further, in the liquid crystal display device of the present invention, the problem of the warpage of the circuit board can be reduced. Further, in the liquid crystal display device of the present invention, the alignment of the substrate with respect to the liquid crystal display panel is also facilitated.

[0052]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 1 shows a first embodiment of the present invention.
1 shows the configuration of the liquid crystal display device according to the embodiment. FIG. 1A is a diagram of the liquid crystal display device according to the first embodiment of the present invention viewed from the front, and FIG. 1B is a diagram of the liquid crystal display device viewed from the X direction. (c) is a view of the liquid crystal display device viewed from the Y direction.

The liquid crystal display device according to the first embodiment of the present invention comprises a liquid crystal display panel 9 having a scanning side glass substrate 1 and a data side glass substrate 2, an electrode transfer section 3, and a plurality of data side flexible circuit boards 4. , A plurality of scanning-side flexible circuit boards 5, a plurality of scanning-side printed circuit boards 6, a data signal supply line 16, a control signal supply line 17, and a power signal supply line 18. A driving IC 7 is arranged on the data-side flexible circuit board 4, and a driving IC 27 is arranged on the scanning-side flexible circuit board 5.

Data side glass substrate 2 of liquid crystal display panel 9
Are connected to the scanning-side printed circuit board 6 via the scanning-side flexible circuit board 5. A data-side flexible circuit board 4 is disposed on the data-side glass substrate 2. The data signal supply line 16 transmits a data signal, the control signal supply line 17 transmits a control signal, and the power signal supply line 18 transmits a power supply signal.

The scanning printed circuit board 6 receives a data signal, a control signal, and a power supply signal from the outside. The data signal, the control signal, and the power signal are input to the scanning flexible circuit board 5 via the scanning printed circuit board 6.

The driving IC 27 disposed on the scanning-side flexible circuit board 5 processes a data signal based on a control signal to generate a scanning-side output signal. Note that a power signal is supplied to the driving IC 27. The scanning-side output signal is input to the scanning-side glass substrate 1 via the electrode transfer unit 3.

All or a part of the data signal, the control signal, and the power supply signal input to the scanning-side flexible circuit board 5 are output from the scanning-side flexible circuit board 5 to the data-side flexible circuit board 4. Drive IC
All or a part of the scanning-side output signal generated by 27 may be output from the scanning-side flexible circuit board 5 to the data-side flexible circuit board 4.

All or a part of the data signal, control signal and power supply signal sent from the scanning-side flexible circuit board 5 to the data-side flexible circuit board 4 are transferred via the data-side glass substrate 2 to another data-side flexible circuit board. The data is sequentially transmitted to the circuit board 4. The driving IC 7 arranged on the data-side flexible circuit board 4 processes the data signal based on the control signal, and outputs the resulting driving signal.

In order to send all or a part of the data signal, the control signal and the power signal from the data-side flexible circuit board 4 to the adjacent data-side flexible circuit board 4,
The data-side glass substrate 2 is provided with a plurality of U-shaped wirings and at least one straight wiring.
In order to transmit a drive signal from the data-side flexible circuit board 4 to the adjacent data-side flexible circuit board 4, the data-side glass board 2 has at least one of a U-shaped wiring and a straight wiring. May be provided. In order to send a signal from the data-side flexible circuit board 4 to the adjacent data-side flexible circuit board 4, wiring is performed using U-shaped wiring and straight wiring, so that it is necessary to secure an extra wiring area on the board. Absent.

The arrows on the data signal supply wiring 16, the control signal supply wiring 17, and the power signal supply wiring 18 in FIG. 1A indicate the flow of the data signal, the control signal, and the power signal, respectively. Is shown. As shown by the arrows in FIG. 1A, the control signal is sequentially transmitted between the data-side flexible circuit boards 4 cascaded by the control signal supply wiring 17. Similarly, the data signal and the power signal are sequentially transmitted between the data-side flexible circuit boards 4.

FIGS. 2A and 2B are diagrams showing a configuration of the data-side flexible circuit board 4. FIG. 2A is a diagram of the data-side flexible circuit board as viewed from the front, and FIG. 2B is a diagram of the data-side flexible circuit board of FIG. 2A as viewed from the Y direction.

The data-side flexible circuit board 4 shown in FIG. 2A includes a driving IC 7, a board 10, a plurality of input terminals a for receiving data signals and control signals, and all of the received data signals and control signals. Or an output terminal b for outputting a part, an output terminal c for outputting a drive signal generated by the drive IC 7 based on the data signal and the control signal, and a first power supply terminal for supplying a voltage to the drive IC 7 d and a second power supply terminal e.

The substrate 10 has a pair of long sides and a pair of short sides, and an alignment mark (register mark) 8. By aligning the alignment mark 8 of the substrate 10 with the alignment mark 8 'of the data-side glass substrate 2 described later,
Data side flexible circuit board and data side glass substrate 2
It is possible to easily determine the connection position with the connection. The input terminal a, the output terminal b, and the output terminal c are arranged on one of a pair of long sides of the substrate 10. Therefore, the width of the data-side glass terminal can be narrowed. The substrate 1
0 is preferably a flexible substrate. Also,
The data-side glass terminal is a medium for transmitting data and the like from the scanning-side printed circuit board 6 to the data-side glass substrate 2.

As shown in FIG. 2B, the driving IC 7 is connected to the substrate 10 by a resin. The surface of the substrate 10 opposite to the surface to which the driving IC 7 is connected is
It is flat. For this reason, the data-side flexible circuit board 4 and the data-side glass substrate 2 can be easily crimped.

FIGS. 3A and 3B are views showing another example of the data-side flexible circuit board 4. FIG. FIG. 3A is a view of the data-side flexible circuit board as viewed from the front, and FIG. 3B is a view of the data-side flexible circuit board of FIG. 3A as viewed from the Y direction.

In the data-side flexible circuit board 4 shown in FIG. 3A, the board 11 has a notch 13. The data-side flexible circuit board 4 shown in FIG. 3A has the same structure as that of FIG.
It has the same configuration as the data-side flexible circuit board 4 shown in FIG. The cutout portion 13 is provided on a long side opposite to the long side on which the input terminal a, the output terminal b, and the output terminal c are arranged. The wiring is provided on the surface opposite to the surface on which the driving IC 7 is arranged so as to straddle the cutout portion 13.

Since the data-side flexible circuit board has the notch 13, it is possible to visually check the crimping state between the data-side glass substrate 2 and the data-side flexible circuit board having the notch 13. Specifically, using a scope or the like, the crimping state is checked not only around the long side and the short side of the data-side flexible circuit board 4 but also inside the notch 13 of the data-side flexible circuit board 4. can do.

Even if the crimping surface has irregularities, the data-side flexible circuit board has the notch 13 so that the notch 13 absorbs the expansion and contraction of the data-side flexible circuit board due to the irregularity of the crimping surface. The data-side flexible circuit board can be flexibly crimped to the crimping surface.

Further, when the data-side flexible circuit board is press-bonded by thermocompression, the data-side flexible circuit board slightly extends due to heat, but the notch 13 absorbs the extension, and the data-side flexible circuit board is flexibly bent. Can be crimped to the crimping surface.

The data-side flexible circuit board 4 shown in FIGS. 2A and 3A can have a changeover switch (not shown) for switching the internal wiring of the boards 10 and 11. For example, when the input terminal a is connected to the first wiring and the output terminal b is connected to the second wiring, the changeover switch connects the input terminal a to the second wiring and connects the output terminal b to the first wiring. Can be connected. Similarly,
When the first power supply terminal d is connected to the third wiring and the second power supply terminal e is connected to the fourth wiring, the changeover switch connects the first power supply terminal d to the fourth wiring, The second power supply terminal e can be connected to the third wiring.

Since the data-side flexible circuit board 4 has a changeover switch, even if the position where the data-side flexible circuit board 4 is mounted on the data-side glass substrate 2 is turned upside down, left and right, the liquid crystal display device according to the present embodiment will be described. Can operate normally.

FIGS. 4A and 4B are views showing a configuration of the scanning-side flexible circuit board 5. FIG.
4A is a view of the scanning-side flexible circuit board 5 as viewed from the front, and FIG. 4B is a view of the scanning-side flexible circuit board 5 of FIG. 4A as viewed from the Y direction.

The scanning-side flexible circuit board shown in FIG. 4A has a driving IC 27, a board 12, a plurality of input terminals a for receiving data signals and control signals, and all or all of the received data signals and control signals. An output terminal b for outputting a part, an output terminal c for outputting a drive signal generated by the drive IC 27 based on the data signal and the control signal, and a first power supply terminal d for supplying a voltage to the drive IC 27 And a second power supply terminal e. The substrate 12 includes a pair of long sides and a pair of short sides, and an alignment mark (register mark) 8.

The input terminal a and the first power supply terminal d are arranged on one long side of the substrate 12 and / or inside the substrate 12. Further, the output terminal b, the output terminal c and the second
Is disposed on the other long side of the substrate 12.

FIG. 5 is a diagram showing a part of the data-side glass substrate 2 in detail. The data-side glass substrate 2 has an alignment mark 8 'and terminals a', b ', c', d ', and e'. The terminals a ′, b ′, c ′, d ′, and e ′ are connected to the data-side flexible circuit board 4 and / or
Alternatively, the input terminal a of the scanning-side flexible circuit board 5
It is electrically connected to the output terminal b, the output terminal c, the first power terminal d, and the second power terminal e.

The alignment mark 8 ′ is used when aligning the scanning-side flexible circuit board and the data-side flexible circuit board with the data-side glass substrate 2. The hatched portion in FIG. 5 indicates a portion where the data-side glass substrate 2 overlaps with the scanning-side flexible circuit board 5 and the data-side flexible circuit board 4.

FIG. 6 shows a liquid crystal display device in which the electrode transfer section 3, the scanning-side flexible circuit board 5, and the data-side flexible circuit board 4 are mounted on the data-side glass substrate 2. The scanning-side flexible circuit board 5 and the data-side flexible circuit board 4 are pressure-bonded to the data-side glass substrate 2 via an anisotropic conductive film (not shown). The scanning-side flexible circuit board 5 includes a scanning-side printed circuit board 6.
And soldered.

FIG. 7 is a view showing the structure of the electrode transition section 3. As shown in FIG. The liquid crystal display device shown in FIG. 7 includes a scanning glass substrate 1, a data glass substrate 2, a scanning electrode 31, a signal electrode 32, and a spacer 3 provided with a color filter layer (not shown).
3, a liquid crystal 34, an alignment film 35, a seal 36, and conductive particles 37. Note that, depending on the structure of the liquid crystal display device, the scanning glass substrate 1 and the data glass substrate 2 in FIG. 7 may be reversed.

The structure of the electrode transition portion 3 is such that the scanning electrode 31 is provided between the scanning glass substrate 1 and the data glass substrate 2 via conductive particles 37 having a diameter substantially equal to the thickness of the liquid crystal layer. This is a structure that is electrically connected to the signal electrode 32.

The conductive particles 37 are produced by coating a flexible non-conductive particle such as plastic with a highly conductive metal layer such as gold by plating or the like.
The conductive particles 37 are dispersed in the sealing resin, and an electrode transfer portion is formed simultaneously with the formation of the sealing resin.

(Second Embodiment) Hereinafter, a second embodiment will be described with reference to the drawings.

FIG. 8 is a diagram showing a liquid crystal display device 100 according to the second embodiment.

The liquid crystal display device 100 includes a liquid crystal display panel 120 having a scanning side glass substrate 101 and a data side glass substrate 102, a plurality of data side flexible circuit boards 1.
03, a plurality of data-side circuit boards 104, a plurality of scanning-side flexible circuit boards 105, and a scanning-side circuit board 106. The data-side flexible circuit board 103
, A driving IC 107 is arranged, and a driving IC 127 is arranged on the scanning-side flexible circuit board 105.

The data side glass substrate 102 of the liquid crystal display panel 120 is connected to the scanning side circuit board 106 via the scanning side flexible circuit board 105. Further, the data side circuit board 104 is connected to the data side glass substrate 102.

The arrows shown in FIG. 8 indicate the flow of signals on the data side. Here, the signal includes at least one of a data signal, a control signal, and a power signal. The signal output from the connector 133 is sequentially transmitted to the data-side circuit board 104 and the data-side flexible circuit board 103.

In the second embodiment, the data-side circuit board 1
The signal output from 04 is input to the data-side flexible circuit board 103 adjacent thereto, and the signal output from the data-side flexible circuit board 103 is input to the adjacent data-side circuit board 104. That is,
The data side circuit board 104 and the data side flexible circuit board 103 are connected in series. Therefore, the data-side circuit board 104 can be made of a single-layer board.

The data signal is transmitted to the adjacent data-side flexible circuit board 103 via the data-side circuit board 104.
The driving IC 107 of the data-side flexible circuit board 103 processes the data signal, and a display signal 134 as a result is sent to the liquid crystal display panel 120. The scanning signal is output to the liquid crystal display panel 120 via the scanning circuit board 106 and the scanning flexible circuit board 105.

Data side circuit board 10 acting as a relay board
The length of 4 may be short as shown in FIG.

Since the length of the data-side circuit board 104 is short, the data-side circuit board 104 can be efficiently cut from one board, and the number of boards that can be taken from one board can be increased. Also, the data side circuit board 104
Is set on the jig, and the data side flexible circuit board 1
The liquid crystal display panel 120 connected to the liquid crystal display device 03 is also set on the jig, and the liquid crystal display device 100 is completed. In other words, since those substrates are simply applied to the machine, the loss in the process is reduced.

In general, the extension of the circuit board due to heat is proportional to the length of the circuit board. However, since the length of the data-side circuit board 104 is short, the problem that the data-side circuit board 104 warps is reduced. Further, when a plurality of materials having different coefficients of thermal expansion are multi-layered, the degree of warpage due to heat increases as long as they are adhered and fixed to each other.
4, the structure can be made into a single layer, and the problem that the data side circuit board 104 warps is reduced.

In the liquid crystal display device 100 shown in FIG. 8, since the distance between the connection portion of the liquid crystal panel 120 and the connection portion of the data side circuit board 104 is short, the data side glass substrate 102 and the data side Flexible circuit board 10
3 and the data-side flexible circuit board 103 and the data-side circuit board 104 can be simultaneously pressed. In addition, when the crimping portions are scattered, it is difficult to adjust the balance of the tool when mounting by crimping connection or soldering connection. However, in the liquid crystal display device 100 shown in FIG. The balance of the tool can be easily adjusted, and the temperature of the tool surface can be easily adjusted.

The data side circuit board 104 may be a long board as shown in FIG.

FIGS. 10 and 11 are views showing liquid crystal display devices 200 and 300 according to the second embodiment.
In particular, FIGS. 10 and 11 clearly show the configuration of the data-side flexible circuit board of the liquid crystal display device 100. FIG.

FIG. 12A is a front view of the data-side flexible circuit board shown in FIG.
(B) is a diagram of the data-side flexible circuit board viewed from the side.

The data-side flexible circuit board 103a shown in FIG. 12 (a) has an input / output wiring terminal section 130 for inputting and outputting signals, and processes a part or all of the signals received by the input / output wiring terminal section 130 for signal processing. The liquid crystal display panel 120 includes a driving IC 107 that generates a display signal as a result of the operation, and an output terminal unit 131 that outputs the display signal to the liquid crystal display panel 120.

FIG. 13A is a front view of the data-side flexible circuit board shown in FIG.
(B) is a diagram of the data-side flexible circuit board viewed from the side.

The data-side flexible circuit board 103b shown in FIG.
03a, input / output wiring terminal section 130, driving IC
107 and an output terminal section 131. Further, the data-side flexible circuit board 103b has a notch 108 on the long side. Therefore, the data side glass substrate 102 and the data side flexible circuit board 10
The state of pressure bonding with 3b can be confirmed. Further, the input / output wiring terminal section 130 of the data-side flexible circuit board 103b and the output terminal section 131 of the data-side flexible circuit board 103b can be electrically independent from each other.

FIG. 14A is a front view of the data-side flexible circuit board shown in FIG.
(B) is a diagram of the data-side flexible circuit board viewed from the side.

The data-side flexible circuit board 103c shown in FIG.
03a, input / output wiring terminal section 130, driving IC
107 and an output terminal section 131.

FIG. 15A is a front view of the data-side flexible circuit board shown in FIG.
(B) is a diagram of the data-side flexible circuit board viewed from the side.

The data-side flexible circuit board 103d shown in FIG.
03b, the input / output wiring terminal section 130, the driving IC
107, an output terminal 131, and a notch 108.

Therefore, it is possible to check the pressure-bonded state between the data-side glass substrate 102 and the data-side flexible circuit board 103d. Also, the input / output wiring terminal portion 13 which is a short side terminal of the data side flexible circuit board 103d.
0 and the output terminal portion 131 which is a long-side terminal of the data-side flexible circuit board 103d can be electrically independent from each other.

FIG. 16 is a diagram showing a liquid crystal display device 400 according to the second embodiment. The liquid crystal display device 400
The liquid crystal display panel 120 includes a scanning-side glass substrate 101 and a data-side glass substrate 102, a plurality of data-side flexible circuit boards 103, a plurality of scanning-side flexible circuit boards 105, and a scanning-side circuit board 106. Note that the liquid crystal display device 400 does not require a data-side circuit board.

FIG. 17A is a front view of the data-side flexible circuit board shown in FIG.
(B) is a diagram of the data-side flexible circuit board viewed from the side.

The data-side flexible circuit board 103e shown in FIG. 17 (a) has an input / output wiring terminal section 130 for inputting and outputting signals, and processes a part or all of the signals received by the input / output wiring terminal section 130 for signal processing. The liquid crystal display panel 120 includes a driving IC 107 that generates a display signal as a result of the operation, and an output terminal unit 131 that outputs the display signal to the liquid crystal display panel 120.

FIG. 18A is a front view of the data-side flexible circuit board shown in FIG.
(B) is a diagram of the data-side flexible circuit board viewed from the side.

The data-side flexible circuit board 103f shown in FIG.
03e, input / output wiring terminal section 130, driving IC
107 and an output terminal section 131. further,
The data side flexible circuit board 103f has the notch 1
08.

Therefore, it is possible to confirm the pressure-bonded state between the data-side glass substrate 102 and the data-side flexible circuit board 103f. Further, the input / output wiring terminal section 130 of the data-side flexible circuit board 103f and the output terminal section 131 of the data-side flexible circuit board 103f can be electrically independent from each other.

FIGS. 12 (b) to 15 (b), FIG.
As shown in FIG. 18B and FIG. 18B, the back surfaces of the data-side flexible circuit boards 103a to 103f are preferably flattened. For this reason, the accuracy with which the data-side flexible circuit boards 103a to 103f are mounted on the data-side glass substrate 102 can be improved.

The fact that the shorter sides of the data-side flexible circuit boards 103a to 103d shown in FIGS. 12 to 15 are shorter than the conventional data-side flexible circuit boards will be described with reference to FIGS. This will be described with reference to FIG.

FIG. 19A is a diagram showing a data-side flexible circuit board of the present embodiment, and FIG.
It is a figure showing the conventional data side flexible circuit board.

As shown in FIG. 19B, in the conventional data-side flexible circuit board, the wiring from the driving IC 107 extends to both long sides of the data-side flexible circuit board. On the other hand, in the data-side flexible circuit board of the present embodiment, as shown in FIG. 19A, the wiring from the driving IC 107 extends only to one long side of the data-side flexible circuit board. In other words, in the conventional data-side flexible circuit board, the length X, which is the sum of the terminal portion of the driving IC 107 and the wiring portion connected to the terminal portion, is wasted.

It is also shown that the shorter sides of the data-side flexible circuit boards 103e and 103f shown in FIGS. 17 and 18 are shorter than the conventional data-side flexible circuit board shown in FIG. This will be described with reference to FIG. 20A and FIG.

FIG. 20A is a diagram showing a data-side flexible circuit board according to the present embodiment, and FIG.
FIG. 26 is a diagram showing the conventional data-side flexible circuit board shown in FIG. 25 (b).

As shown in FIG. 25B, in the conventional data-side flexible circuit board, wiring from the driving IC 107 is provided on both long sides of the data-side flexible circuit board as shown in FIG. Extending. On the other hand, in the data-side flexible circuit board of the present embodiment, the wiring from the driving IC 107 extends only to one long side of the data-side flexible circuit board. That is, FIG.
In the conventional data-side flexible circuit board shown in (1), the length Y which is the sum of the terminal portion of the driving IC 107 and the wiring portion connected to the terminal portion is wasted.

Hereinafter, the input terminal 141 and the leading line 1 of the data-side glass substrate 102 in this embodiment will be described.
42 will be described with reference to FIGS. 21 and 22.

FIG. 21 and FIG. 22 are diagrams showing the input terminal portion 141 of the data-side glass substrate 102 and the routing wiring 142.

By exposing the glass electrode on the surface of the data-side glass substrate 102, the input terminal portion 141 and the lead-out wiring 142 are formed. The input terminal section 141
Output terminal 13 of data-side flexible circuit board 103
1 is connected. In addition, since the leading wiring is exposed at the end of the data-side glass substrate 102, there is a possibility that a leak between lines may occur. To prevent such line-to-line leakage, the data side glass substrate 102 is coated with a top coat (TC).
It is preferred that the surface be coated.

As shown in FIG. 22, the wiring 14
2 is the driving IC 1 closer to the data-side circuit board 104
07 , extends under the driving IC 107 to the display section of the liquid crystal display panel 120. In other words,
At a portion near the end of the data-side glass substrate 102, the output terminal 131 is connected to the input terminal 141, and
Closest to the driving IC 107, the electrical connections of the drive IC 107 and the output terminal portion 131, wire routing 14
2 is extended.

FIG. 23 is a view showing the conventional wiring 143 and the wiring 142 of the present embodiment. As shown in FIG. 23, for example, a conventional wiring 1
The distance W1 between the lines 43 is 0.052 mm, and the distance W2 between the leads 142 of the present embodiment is 0.074 mm. That is, W1 <W2, and the distance between the lines in the present embodiment is wider by 0.22 mm. For this reason, the degree of freedom in designing the routing of the routing wiring is increased.

In the above-described data-side flexible circuit board of the present embodiment, the input / output terminal of the input / output terminal section can be switched by the setting terminal on the printed circuit board. May be reversed left and right and upside down.

Hereinafter, the pressure bonding step of the liquid crystal display device of the present embodiment will be described.

In order to temporarily fix the anisotropic conductive film, the anisotropic conductive film is attached to the liquid crystal display panel 120. The input terminals of the data-side glass substrate 102 are positioned such that 141 corresponds to the output terminals 131 of the data-side flexible circuit board 103.
02 and the data-side flexible circuit board 103 are temporarily press-bonded via the anisotropic conductive film.

The input / output terminals 130 of the data-side flexible circuit board 103 are positioned so as to correspond to the connection terminals of the data-side circuit board 104 to which the anisotropic conductive film is attached, and 10
3 and the data-side circuit board 104 are temporarily press-bonded via the anisotropic conductive film.

When the length of the data side circuit board 104 is relatively short, the plurality of data side circuit boards 104 and the data side flexible circuit board 103 are temporarily fixed. A plurality of data-side circuit boards 104 are fitted to a jig shaped into the shape of the data-side circuit board, and are set with a plurality of data-side flexible circuit boards 103 via a double-sided tape or the like to perform positioning. The circuit board 104 is temporarily fixed. Also, a data side circuit board 1 which is a relay circuit board
If the length of the circuit board 04 is relatively long, the data side circuit board 10
4 are set, and they are temporarily fixed with a double-sided tape or the like.

Thereafter, the main bonding of the data side glass substrate 102 and the data side flexible circuit board 103 and the data side flexible circuit board 103 and the data side
4 is performed at one time.

The above-described operation can be smoothly performed by attaching the anisotropic conductive film to the data-side circuit board 104 in advance.

In this embodiment, the output terminal for outputting a signal from the driving IC provided on the data-side flexible circuit board to the display section is positioned outside the driving IC with respect to the display section. It can be connected to an electrode terminal of a liquid crystal display panel. As a result, a margin in connection accuracy can be provided, a connection region can be widened, and a frame of the liquid crystal display device can be narrowed.

In the case of manufacturing the liquid crystal display device of the present embodiment, it is possible to use a crimping tool having a wide width, and the thermal conductivity in the tool is improved. In addition, an inexpensive crimping tool can be used.

In the present embodiment, the distance between the polarizing plate on the liquid crystal display surface and the crimp connection can be made large, so that the influence of heat during crimp connection on the polarizing plate can be reduced.

In the present embodiment, since the distance between the connection position on the electrode of the liquid crystal display panel and the connection position on the circuit board is short, the compression bonding step can be completed by one full compression bonding.

In the wiring design on the glass electrode, there is more room between the lead wires than in the conventional example, so that a higher definition liquid crystal display panel can be manufactured.

The glass edge on the electrode of the conventional glass substrate was chamfered because the wiring pattern of the flexible circuit board was sometimes cut off at the glass edge. At the edge of the glass electrode terminal of a liquid crystal display device without a circuit board around the display panel, the data-side flexible circuit board can be connected and arranged inside the display panel. It is not covered and the wiring pattern of the flexible circuit board is not broken. That is, in the present embodiment, since the data-side flexible circuit board does not cover the glass substrate edge, the wiring pattern of the data-side flexible circuit board is not cut by the edge. Further, since the data-side flexible circuit board can be crimped near the edge of the glass substrate, the connection (crimping) area can be widened. Since the influence of stress or the like on the flexible circuit board is eliminated, disconnection of the connection near the output terminal portion is eliminated.

[0135]

According to the present invention, there is provided a flexible circuit board comprising: an input wiring terminal for receiving a data signal and a control signal sent to a driving IC; a first output wiring terminal for outputting a signal from the driving IC; A second output wiring terminal for outputting a part or all of the data signal and the control signal;
One of the pair of long sides is provided along a straight line. Therefore, when the flexible circuit board is connected to the data-side glass substrate, the data-side glass substrate can be narrowed.

Another flexible circuit board according to the present invention comprises a first output wiring terminal for outputting a signal from the driving IC and a second output wiring for outputting the signal used in the data-side flexible circuit board. And a first output wiring terminal and the second output wiring terminal are provided on one of the long sides of the pair of long sides. Therefore, when the flexible circuit board is connected to the data-side glass substrate, the data-side glass substrate can be narrowed.

The liquid crystal display device of the present invention comprises a liquid crystal display panel having a plurality of signal electrodes and a plurality of scanning electrodes arranged in a matrix so as to face each other, having a display section, a driving IC for generating scanning signals, and A liquid crystal display device comprising at least one data-side flexible circuit board having an output terminal for supplying to the plurality of signal electrodes, and a scanning-side flexible circuit board for supplying a scanning signal to the plurality of scanning electrodes. The driving IC is located between the display unit and the output terminal of the data-side flexible circuit board.

Therefore, when the flexible circuit board is connected to the liquid crystal display panel, the data-side flexible circuit board can be connected outside the driving IC. As a result, the data-side flexible circuit board can be packed more inward with respect to the liquid crystal display panel side and connected to the liquid crystal display panel, and the frame of the liquid crystal display device can be narrowed.

[Brief description of the drawings]

FIG. 1A is a diagram of a liquid crystal display device according to a first embodiment of the present invention as viewed from the front, FIG. 1B is a diagram of the liquid crystal display device as viewed from an X direction, and FIG. FIG. 3 is a view of the liquid crystal display device as viewed from a Y direction.

FIG. 2A is a view of the data-side flexible circuit board as viewed from the front, and FIG. 2B is a view of the data-side flexible circuit board shown in FIG.

FIG. 3A is a view of the data-side flexible circuit board as viewed from the front, and FIG. 3B is a view of the data-side flexible circuit board shown in FIG.

4A is a view of the scanning-side flexible circuit board as viewed from the front, and FIG. 4B is a view of the scanning-side flexible circuit board shown in FIG.

FIG. 5 is a diagram showing details of a part of a data-side glass substrate 2;

FIG. 6 shows an electrode transfer unit 3 and a scanning-side flexible circuit board 5
FIG. 2 is a diagram showing a liquid crystal display device in which a data-side flexible circuit board 4 is mounted on a data-side glass substrate 2.

FIG. 7 is a view showing the structure of an electrode transition section 3;

FIG. 8 is a diagram illustrating a liquid crystal display device according to a second embodiment of the present invention.

FIG. 9 is a diagram showing a liquid crystal display device in which a data-side circuit board 104 is a long board.

FIG. 10 is a diagram illustrating a liquid crystal display device 200 according to a second embodiment of the present invention.

FIG. 11 is a diagram illustrating a liquid crystal display device 300 according to a second embodiment of the present invention.

12A is a view of the data-side flexible circuit board shown in FIG. 10 as viewed from the front, and FIG. 12B is a view of the data-side flexible circuit board as viewed from the side.

13A is a view of the data-side flexible circuit board shown in FIG. 10 as viewed from the front, and FIG. 13B is a view of the data-side flexible circuit board as viewed from the side.

14A is a view of the data-side flexible circuit board shown in FIG. 11 as viewed from the front, and FIG. 14B is a view of the data-side flexible circuit board as viewed from the side.

15A is a diagram of the data-side flexible circuit board shown in FIG. 11 viewed from the front, and FIG. 15B is a diagram of the data-side flexible circuit board viewed from the side.

FIG. 16 is a diagram illustrating a liquid crystal display device 400 according to a second embodiment of the present invention.

17A is a view of the data-side flexible circuit board shown in FIG. 16 as viewed from the front, and FIG. 17B is a view of the data-side flexible circuit board as viewed from the side.

18A is a diagram of the data-side flexible circuit board shown in FIG. 16 as viewed from the front, and FIG. 18B is a diagram of the data-side flexible circuit board as viewed from the side.

FIG. 19A is a diagram illustrating a data-side flexible circuit board according to a second embodiment, and FIG. 19B is a diagram illustrating a conventional data-side flexible circuit board.

20A is a diagram illustrating a data-side flexible circuit board according to a second embodiment, and FIG. 20B is a diagram illustrating a conventional data-side flexible circuit board.

FIG. 21 shows an input terminal 14 of the data-side glass substrate 102.
FIG. 5 is a diagram showing 1 and the routing wiring 142.

FIG. 22 shows an input terminal 14 of the data-side glass substrate 102.
FIG. 5 is a diagram showing 1 and the routing wiring 142.

FIG. 23 is a diagram illustrating a conventional wiring 143 and a wiring 142 according to the present embodiment.

24A is a view of a liquid crystal display device using a flexible circuit board as viewed from above, and FIG. 24B is an enlarged view of the flexible circuit board.

FIG. 25A is a top view of a liquid crystal display device using a flexible circuit board, and FIG. 25B is an enlarged view of the flexible circuit board.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 scanning side glass substrate 2 data side glass substrate 3 electrode transition 4 data side flexible circuit board 5 scanning side flexible circuit board 6 scanning side printed circuit board 7 driving IC 8 alignment mark (register mark) 9 liquid crystal display panel 16 data signal Supply wiring 17 Control signal supply wiring 18 Power signal supply wiring a Input terminal b Output terminal c Output terminal d First power terminal e Second power terminal

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-8-320465 (JP, A) JP-A-6-95136 (JP, A) JP-A-4-235530 (JP, A) JP-A-10- 221707 (JP, A) Hikaru Hei 3-114820 (JP, U) Hiko 4-47742 (JP, Y2) (58) Field surveyed (Int. Cl. ⁷ , DB name) H05K 1/11 G02F 1 / 1345 H05K 1/14

Claims (2)

(57) [Claims] A first insulating tape having a pair of long sides and a pair of short sides; a first driving IC mounted on the first insulating tape; and a first driving IC mounted on the first driving IC. A first input wiring terminal for receiving a data signal and a control signal to be supplied, a first output wiring terminal for outputting a signal from the first driving IC, and outputting a part or all of the data signal and the control signal Output wiring terminal and the first driving IC
First and second power signal terminals for supplying a voltage to
The first input wiring terminal, the first output wiring terminal, and the second output wiring terminal are provided on one of the long sides of the pair of long sides. A plurality of data sides each having the first power signal terminal provided on one short side thereof and the second power signal terminal provided on the other short side of the pair of short sides. A flexible circuit board; a second insulating tape having a pair of long sides and a pair of short sides;
A second driving IC mounted on the second insulating tape,
A second input wiring terminal for receiving a signal used in the data-side flexible circuit board, a third output wiring terminal for outputting a signal from the second driving IC, and a third output wiring terminal for use in the data-side flexible circuit board; The fourth output of the signal
The third output wiring terminal and the fourth output wiring terminal are provided on one long side of the pair of long sides, and the other of the pair of long sides is provided. A scanning flexible circuit board provided with the second input wiring terminal on a long side or inside the second insulating tape; a data-side flexible circuit board; and a data-side glass connected to the scanning flexible circuit board. A substrate, a scanning-side glass substrate facing the data-side glass substrate, a liquid crystal interposed between the scanning-side glass substrate and the data-side glass substrate, and a scanning signal output from the data-side glass substrate. An electrode transfer portion provided between the scanning side glass substrate and the data side glass substrate to transmit the data to the scanning side glass substrate; and a data signal supply wiring provided at the data side glass substrate terminal, signal With the line and the power signal supply line, and the data-side glass substrate, data signal, has a straight line to send the data side FPCB contact該隣all or part of the control signal and power signal, The data-side flexible circuit board is used for the data-side glass.
On the data side glass substrate so as not to protrude from the substrate
The mounted liquid crystal display. 2. A method a plurality of signal electrodes and a plurality of scanning electrodes are opposed in matrix, a liquid crystal display panel having a display unit, a driving IC for generating a display signal, the display signal to the signal electrodes of the plurality of A liquid crystal display device comprising at least one data-side flexible circuit board having an output terminal for supplying a scan signal and a scan-side flexible circuit board for supplying a scan signal to the plurality of scan electrodes . The IC includes the display unit and the data-side flexible circuit.
Located between the output terminals of the road substrate, wire routing input terminal and said input terminal for inputting the display signal, one data side Flexi said at least
The liquid crystal display device from the end of the driving IC closer to the table circuit board, extends in the display portion of the liquid crystal display panel through the bottom of the drive processing IC.