KR100327921B1 - Flexible circuit board and liquid crystal display device incorporating the same - Google Patents

Abstract

A flexible circuit board includes an insulating tape having a pair of long sides and a pair of short sides; A driving IC mounted on the insulating tape; An input terminal for receiving a data signal and a control signal to be transmitted to the driver IC; A first output terminal for outputting a signal from the driver IC; A second output terminal for outputting at least a portion of the data signal and the control signal; And first and second power signal terminals for supplying a voltage to the driving IC, wherein the input terminal, the first output terminal and the second output terminal are provided on one of a pair of long sides, The first power signal terminal is provided on one of the pair of short sides, and the second power signal terminal is provided on the other of the pair of short sides.

Description

FLEXIBLE CIRCUIT BOARD AND LIQUID CRYSTAL DISPLAY DEVICE INCORPORATING THE SAME

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 audiovisual electronic device, a display device of an office automatic (OA) terminal, an advertisement display device, and the like. In particular, the present invention relates to circuit boards (CBs) for supplying signals to liquid crystal panels.

Flexible CBs are used as circuit boards for supplying signals to liquid crystal (LC) panels of LC display devices. For example, Japanese Patent Laid-Open Nos. 4-115228 and 8-28395 disclose a LC display device incorporating flexible CBs.

All of the above-mentioned materials do not disclose any LC display device in which the terminals of the data side substrate are provided in a narrow frame-like peripheral region.

The flexible circuit board according to the present invention includes an insulating tape having a pair of long sides and a pair of short sides; An input terminal for receiving a data signal and a control signal to be transmitted to the driver IC; A first output terminal for outputting a signal from the driver IC; A second output terminal for outputting at least a portion of the data signal and the control signal; And a second power signal terminal for supplying a voltage to the driver IC, wherein one of the pair of long sides is provided with an input terminal, a first output terminal, and a second output terminal, One of the first power signal terminals is provided, and the other of the pair of short sides is provided the second power signal terminal.

In one embodiment of the invention, a notch is provided on the other of the pair of long sides.

On the other hand, the flexible circuit board according to the present invention includes an insulating tape having a pair of long sides and a pair of short sides; A driving IC mounted on an insulating tape; An input terminal for receiving a signal used in the data-side flexible circuit board; A first output terminal for outputting a signal from the driver IC; And a second output terminal for outputting a signal used in the data-side flexible circuit board, wherein the first output terminal and the second output terminal are provided on one of a pair of long sides, and the input terminal is at least one pair. On the other side of the long side and inside the insulating tape.

In one embodiment of the present invention, the signal used for the data side flexible circuit board is at least one of a data signal, a control signal, and a power signal.

A liquid crystal display device according to the present invention comprises: a scanning side glass substrate; A data side glass substrate facing the scanning side glass substrate; A liquid crystal interposed between the scan side glass substrate and the data side glass substrate; An electrode transition portion provided between the scan side glass substrate and the data side glass substrate to transmit a scan signal output from the data side glass substrate to the scan side glass substrate; And a data signal line, a control signal line, and a power supply signal line provided on the data side glass substrate.

Alternatively, the liquid crystal display according to the present invention may include 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; A first input terminal for receiving a data signal and a control signal to be transmitted to the first driver IC; A first output terminal for outputting a signal from the first driver IC; A second output terminal for outputting at least a portion of the data signal and the control signal; And first and second power signal terminals for supplying a voltage to the first driving IC, wherein the first input terminal, the first output terminal and the second output terminal are connected to one of the pair of long sides of the first insulating tape. Provided on one, the first power signal terminal is provided on one of the pair of short sides of the first insulating tape, the second power signal terminal is provided on the other of the pair of short sides of the first insulating tape,

The scanning side flexible circuit board comprises 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 terminal for receiving a signal used on the data side flexible circuit board; A third output terminal for outputting a signal from the second driver IC; A fourth output terminal (the third output terminal and the fourth output terminal is provided on one of a pair of long sides of the second insulating tape, for outputting a signal used in the data-side flexible circuit board, and the second input terminal Is provided inside at least one of the pair of long sides of the second insulating tape and the second insulating tape), a data side glass substrate coupled to the data side flexible circuit board and the scan side flexible circuit board; A scanning side glass substrate facing the data side glass substrate; A liquid crystal interposed between the scan side glass substrate and the data side glass substrate; An electrode transition portion provided between the scan side glass substrate and the data side glass substrate for transmitting the scan signal output from the data side glass substrate to the scan side glass substrate; And a data signal line, a control signal line, and a power supply signal line provided on the data side glass substrate.

On the other hand, the liquid crystal display device according to the present invention is a driver IC; A scanning side glass substrate having a first display driving terminal; A signal side glass substrate having a second display driving terminal; And an electrode transition portion provided between the scanning side glass substrate and the signal side glass substrate, wherein the driving IC is coupled to a second display driving terminal of the signal side glass substrate, and the first display driving terminal of the scanning side glass substrate is an electrode. A signal supplied to the driving IC is received through the transition unit and the second display driving terminal.

In one embodiment of the invention, the signal is at least one of a data signal and a control signal.

In another embodiment of the present invention, the liquid crystal display further includes a scanning side printed circuit board for supplying a signal to the first display driving terminal of the scanning side glass substrate.

In another embodiment of the present invention, a seal region is provided around the scanning side glass substrate and the signal side glass substrate, and the electrode transition portion is formed in the sealing region.

On the other hand, the liquid crystal display according to the present invention comprises: a scanning side glass substrate having a first display driving terminal; A signal side glass substrate having a second display driving terminal and wiring; A first flexible circuit board having a first driving IC; And a second flexible circuit board having a second driving IC, wherein the first flexible circuit board is coupled to the scan side glass substrate, the second flexible circuit board is coupled to the signal side glass substrate, and the first flexible circuit The substrate is electrically coupled to the second flexible circuit board through an electrode transition portion provided between the scanning side glass substrate and the signal side glass substrate.

In addition, the liquid crystal display device according to the present invention includes a data side printed circuit board having a power supply wiring; A signal side glass substrate having a display driving terminal and wiring; And a power supply terminal and a power supply provided on each of the driver IC, an output terminal formed on one side of the flexible circuit board for outputting a signal to the liquid crystal display panel, and a pair of sides positioned at an angle with the one side. A flexible circuit having a terminal, wherein an output terminal of the flexible circuit board is electrically coupled to the display drive terminal of the signal-side glass substrate, and the flexible circuit board is connected to the power supply wiring in a manner that Electrically coupled to the data-side printed circuit board.

In one embodiment of the present invention, the liquid crystal display further comprises a scan side printed circuit board having power supply wiring, which is coupled to the power supply wiring of the data side printed circuit board via an FFC cable.

On the other hand, the liquid crystal display device according to the present invention includes a data side printed circuit board having a power supply wiring; A signal side glass substrate having a display drive terminal and a data side signal / control signal line; A driving IC, an output terminal formed on one side of a flexible circuit board for outputting a signal to a liquid crystal display panel, and an input / output terminal and a power supply terminal provided on each of a pair of sides positioned at an angle with the one side A flexible circuit board having a flexible circuit board, wherein the power supply terminal of the flexible circuit board is electrically coupled to the power supply wiring of the data side printed circuit board, the flexible circuit board has a portion overlapping the signal side glass substrate, and the flexible circuit board is a flexible circuit board. Is coupled to the signal-side glass substrate at the overlapping portion in such a manner that the output terminal of is electrically coupled to the data-side signal / control signal line and the input / output terminal of the flexible circuit board is electrically coupled to the display drive terminal.

In one embodiment of the invention, the signal is a data signal.

In another embodiment of the invention, the signal is a control signal.

In yet another embodiment of the present invention, the first flexible circuit board is coupled in contact with the scanning side glass substrate through the first contact surface, and the second flexible circuit board is coupled in contact with the signal side glass substrate through the second contact surface. These first and second contact surfaces are inserted between the scanning side glass substrate and the signal side glass substrate.

Therefore, in the flexible circuit board of the present invention, an input terminal for receiving a data signal control signal to be transmitted to the driver IC, a first output terminal for outputting a signal from the driver IC, and all or part of the data signal and the control signal The second output terminal for outputting is provided as one line along one of the long sides of the flexible circuit board. As a result, all of these terminals can be simultaneously coupled with the terminals on the data side glass substrate. Most of these terminals are provided on the long side of the flexible circuit board, and the number of terminals provided on the short side of the flexible circuit board is reduced accordingly, so that the dimensions of the short side of the flexible circuit board can be reduced.

The structure according to the invention facilitates the press attachment process. In particular, adjustment to the press tool balance becomes easy. Here, the term "press tool balance" is defined as the balance between the mechanism for the pressed substrates and the substrate to which it is attached. In general, a good "press tool balance" illustrates a state in which such a mechanism is in uniform contact with the substrate to be attached. For example, a bad "press tool balance" in a crimping or soldering connection situation may appear when crimping occurs in a distributed position.

According to the present invention, when a plurality of flexible circuit boards are used so that the flexible circuit boards are arranged around the data side glass substrate, as part of the wiring for transmitting signals to the adjacent flexible circuit boards (at the input / output terminals of the flexible circuit board) It is possible to use the terminals on the data-side glass substrate (combined correspondingly). As a result, the terminal portion on the data side glass substrate electrically couples the input terminal and / or output terminal of the flexible circuit board to, for example, the terminal of the adjacent flexible circuit board where the terminals of the adjacent flexible circuit board are coupled in a straight line. It can also be used as part of the wiring to make it. This helps to erase the redundant area on the data side glass substrate extending in the short side direction of the flexible circuit board.

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 bonding area between the output terminal on the short side of the flexible circuit board of the liquid crystal display panel and the input terminal on the short side of the adjacent flexible circuit board. Can be reduced. As a result, the frame-shaped peripheral area of the LC display device can be effectively narrowed.

In other embodiments of the invention, the flexible circuit board may have notches along other long sides. This makes it possible to visually confirm the attachment state between the flexible circuit board and the data side glass substrate.

A flexible circuit board according to another embodiment of the present invention includes a first output terminal for outputting a signal from a driving IC and a second output terminal for outputting a signal used on the data-side flexible circuit board. And a second output terminal is provided along one of the pair of long sides of the flexible circuit board. As a result, the frame-like peripheral region of the data side glass substrate for joining the flexible circuit board with the data side glass substrate can be narrowed.

In the liquid crystal display according to the present invention, an electrode transition portion for the scan signal line is provided between the scan side glass substrate and the data side glass substrate, so that the scan signal input from the data side glass substrate is scanned on the scan side glass substrate through the electrode transition portion. It can be supplied to the signal line. This eliminates the need for bonding the scan side glass substrate with the data side glass substrate using jumper leads or the like. As a result, wiring designs for data signal lines, control signal lines, power signal lines, and the like are simplified, which facilitates the overall design work for the liquid crystal display device of the present invention.

When the data side flexible circuit board and the scanning side flexible circuit board face in the same direction, it is possible to simultaneously crimp such a flexible circuit board and to simultaneously inject a moisture proof material onto the wiring.

When the data-side flexible circuit board is arranged to be fixed in the data-side glass substrate, it reduces the circuit board and manufacturing costs, and provides reliability and vibration resistance (in terms of the possibility of disconnection of the wiring connected to the input and / or output terminals). Will be improved).

When the data side flexible circuit board or the scanning side flexible circuit board is pressed onto the data side glass substrate by the anisotropic conductive film, the data side or the scanning side flexible circuit board can be peeled off conveniently. This facilitates repair of the liquid crystal display panel.

Therefore, the present invention described above enables the advantage of providing an LC display device in which the terminal portion of the data side glass substrate is provided in the narrow frame-like peripheral region.

These and other advantages of the present invention will become apparent upon reading and understanding the following detailed description by those skilled in the art with reference to the accompanying drawings.

1A is a front view of an LC display device according to an exemplary embodiment of the present invention.

FIG. 1B is a side view of the LC display device of FIG. 1A seen in the direction indicated by X. FIG.

FIG. 1C is a side view of the LC display device of FIG. 1A seen in the direction indicated by Y. FIG.

Fig. 2A is a front view of the data side flexible CB.

FIG. 2B is a side view of the data-side flexible CB of FIG. 2A seen in the direction indicated by Y. FIG.

Fig. 3A is a front view of the data side flexible CB.

FIG. 3B is a side view of the data-side flexible CB of FIG. 3A seen in the direction indicated by Y. FIG.

Fig. 4A is a front view of the scanning side flexible CB.

FIG. 4B is a side view of the scanning side flexible CB of FIG. 4A seen in the direction indicated by Y. FIG.

FIG. 5 illustrates in detail part of the data side glass substrate 2; FIG.

6 is an exemplary view of an LC display device on which an electrode transition portion, a scanning side flexible CBs, and a data side flexible CBs are mounted on a data side glass substrate according to the present invention.

7 is a schematic diagram illustrating a structure of an electrode transition portion.

8 is a plan view illustrating the configuration of an LC display device according to a second embodiment of the present invention;

9 is a plan view illustrating the flexible CB in detail.

10 is a plan view illustrating a part of a signal side glass substrate and a scanning side glass substrate in the vicinity thereof;

11 is an illustration of an electrode transition portion formed between a scanning side glass substrate and a signal side glass substrate.

12 shows an example of a register mark.

13 illustrates in detail the structure of an FPC.

14 is a schematic cross-sectional view illustrating the electrode transition portion.

15 illustrates FFC in detail.

16 illustrates a flexible CB.

17 is a plan view illustrating a part of a signal side glass substrate and a scanning side glass substrate in the vicinity thereof;

18 shows an electrode transition portion formed between a scanning side glass substrate and a signal side glass substrate.

19 shows an example of a register mark.

<Explanation of symbols for the main parts of the drawings>

1, 101: scanning side glass substrate

2, 102: signal side glass substrate

3, 116: electrode transition portion

4: data side flexible circuit board

5: scanning side flexible circuit board

6: scanning side printed circuit board

9: LC display panel

27: driving integrated circuit (IC)

(Example 1)

1 (a), 1 (b) and 1 (c) illustrate the configuration of an LC display device according to an embodiment of the present invention. FIG. 1A is a front view of the LC display device, FIG. 1B is a side view of the LC display device seen from the X direction, and FIG. 1C is a side view of the LC display device viewed from the Y direction.

The LC display device of this embodiment includes an LC display panel 9 having a scanning side glass substrate 1 and a data side glass substrate 2; An electrode transition part 3; A plurality of data side flexible CBs 4 which are mutually coupled cascades; A plurality of scanning side flexible CBs 5; Scan-side printing CBs 6; Wiring 16 for transmitting a data signal; A wiring 17 for transmitting a control signal; And a wiring 18 for transmitting a signal from the power supply. Each data side flexible CBs 4 is provided with a driving IC (integrated circuit) 7. Each scanning side flexible CB 5 is provided with a driving IC 27.

The data side glass substrate 2 of the LC display panel 9 is electrically coupled to the scanning side printing CB 6 via the scanning side flexible CBs 5. The data side flexible CBs 4 are provided on the data side glass substrate 2.

The scanning side print CB 6 receives data signals, control signals and power signals from the outside. The data signal, the control signal and the power supply signal are input to each scanning side flexible CB 5 via the scanning side printing CB 6.

The driving IC 27 provided to each scanning side flexible CB 5 processes a data signal according to a control signal in order to generate a scanning side output signal. The power signal is supplied to the driving ICs 27. The scan side output signals are input to the scan side glass substrate 1 through the electrode transition section 3.

All or part of the data signal, the control signal and the power supply signal supplied to the scanning side flexible CB 5 are output from each scanning side flexible CB 5 to the data side flexible CB 4. All or part of the scanning side output signal generated by the driving ICs 27 may be output from each scanning side flexible CB 5 to the data side flexible CBs 4.

All or part of the data signal, control signal and power signal transmitted from each scanning side flexible CB 5 to the data side flexible CBs 4 are sequentially transferred to the other data side flexible CBs 4 via the data side glass substrate 2. Is sent to. The driving ICs 7 on the data side flexible CBs 4 process the data signals in accordance with the control signals to generate the drive signals.

In order to transfer the drive signal from one data side flexible CB 4 to the adjacent data side flexible CB 4, a U-shaped wiring and / or a straight wiring may be provided on the data side glass substrate 2. Extra wiring area on each data side flexible CB 4 by the use of U-shaped wiring and / or straight wiring for transferring the drive signal from one data side flexible CB 4 to the adjacent data side flexible CB 4. Do not need to secure.

In FIG. 1A, the wiring 16 (for transmitting a data signal), the wiring 17 (for transmitting a control signal) and the wiring 18 (for transmitting a power signal) are connected to a data signal, It is shown by an arrow indicating each flow direction of the control signal and the power signal. As indicated by arrows in Fig. 1A, control signals are sequentially transmitted from one data side flexible CB 4 to another CB 4 via a wiring 17 (data side flexible CBs 4 are Note that they are mutually cascaded). Similarly, data signals and power supply signals are also sequentially transmitted from one data side flexible CB 4 to another CB 4.

2 (a) and 2 (b) illustrate the configuration of each data side flexible CB 4. FIG. 2A is a front view of the data side flexible CB 4, and FIG. 2B is a side view of the data side flexible CB 4 of FIG. 2A seen from the Y direction.

The data side flexible CB 4 shown in Fig. 2A includes a driving IC 7; An input terminal a for receiving data signals and control signals; An output terminal b for outputting all or part of the received data signal and control signal; An output terminal c for outputting a drive signal generated by the driver IC 7 in accordance with the data signal and the control signal; And first and second power supply terminals d and e for supplying a voltage to the driver IC 7.

The substrate 10 has a pair of relatively long sides (hereinafter "long sides") and a pair of relatively short sides (hereinafter "short sides"). The substrate 10 also has a positioning mark (register mark) 8 on its surface. By aligning the register mark 8 on the substrate 10 with the register mark 8 'on the data side glass substrate 2, the data side flexible CB 4 is easily positioned relative to the data side glass substrate 2, or The reverse is also possible. As shown in FIG. 2A, the input terminal a, the output terminal b, and the output terminal c are provided on one of the long sides of the substrate 10. As a result, the terminal portion of the data side glass substrate 2 can be provided in the narrow frame-like peripheral region. It is preferable that the board | substrate 10 is a flexible board | substrate. The terminal portion of the data side glass substrate 2 is defined as a medium for transferring data or the like from the scanning side printing CB 6 to the data side glass substrate 2.

As shown in Fig. 2B, the driving IC 7 is bonded to the substrate 10 by resin. The surface of the substrate 10 opposite to the surface on which the driver IC 7 is provided is flattened. As a result, the data side flexible CB 4 can be easily attached to the data side glass substrate 2 by pressure or the like.

3A and 3B illustrate another configuration of each data side flexible CB 4. FIG. 3A is a front view of the data side flexible CB 4, and FIG. 3B is a side view of the data side flexible CB 4 of FIG. 3A seen from the Y direction.

As shown in Fig. 3A, the data side flexible CB 4 is based on the substrate 11 having the notches 13. Alternatively, the data side flexible CB 4 of FIG. 3A has the same structure as that of the data side flexible CB 4 of FIG. 2A. Notch portion 13 is input terminal a; Output terminal b; The output terminal c is provided on the long side of the substrate 11 opposite to the long side provided. The wiring 50 extends to both of the notches 13 on the surface of the data-side flexible CB 4 opposite to the surface on which the driver IC 7 is disposed.

By using the notch 13 of the data side flexible CB 4, the crimping state between the data side glass substrate 2 and the data side flexible CB 4 can be visually confirmed. Specifically, the crimping state of the inside of the data side flexible CB 4 as well as the long side and the short side periphery of the data side flexible CB 4 can be confirmed by the notch part 13 by a microscope etc.

When the data side flexible CB 4 is press-bonded on a somewhat uneven surface, the notch portion 13 of the data side flexible CB 4 expands / expands the data side flexible CB 4 due to the surface irregularities. Absorbing shrinkage allows the data side flexible CB 4 to be flexibly pressed onto the surface.

In addition, slight expansion of the data-side flexible CB 4 that occurs when pressed to the surface by thermal compression is also absorbed by the notch portion 13 so that the data-side flexible CB 4 can be flexibly pressed onto the surface. To be able.

The data side flexible CB 4 shown in FIGS. 2A and 3A may include a switch (not shown) for switching the internal wiring in the substrate 10 or 11. For example, when input terminal a is coupled to the first wiring and output terminal b is coupled to the second line, the switch can be operated to couple input terminal a to the second wiring and output terminal b to the first wiring. have. Similarly, when the first power terminal d is coupled to the third wiring and the second power terminal e is coupled to the fourth wiring, the switch connects the first power terminal d to the fourth wiring and the second power terminal e to the third wiring. Can be operated to couple to a.

In applications in which such a switch is integrated in the data side flexible CB 4, when the data side flexible CB 4 is attached to the data side glass substrate 2, the switch is appropriately operated, for example, up, down, left or right. In the opposite position, the LC display device according to the present embodiment can be properly operated.

4 (a) and 4 (b) illustrate the configuration of each scanning side flexible CB 5. 4A is a front view of the scanning side flexible CB 5, and FIG. 4B is a side view of the scanning side flexible CB 5 of FIG. 4A seen in the Y direction.

The scanning side flexible CB 5 shown in Fig. 4A includes a driver IC 27; Substrate 12; An input terminal a for receiving data signals and control signals; An output terminal b for outputting all or part of the received data signal and control signal; An output terminal c for outputting a drive signal generated by the driver IC 27 in accordance with the data signal and the control signal; And first and second power supply terminals d and e for supplying a voltage to the driver IC 27.

The substrate 12 has a pair of long sides and a pair of short sides. The substrate 12 also has a position alignment mark (register mark) on its surface.

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

5 is a view showing a part of the data side glass substrate 2 in detail. As shown in Fig. 5, the data side glass substrate 2 has a register mark 8 ', terminals a', b ', c', d 'and e'. Terminals a ', b', c ', d' and e 'are the input terminal a, the output terminal b, the output terminal c and the first power supply terminal of the data-side flexible CB 4 and / or the scan-side flexible CB 5; is electrically coupled to d and the second power supply terminal e.

The register mark 8 'is used to align the scanning side flexible CBs 5 and the data side flexible CBs 4 with respect to the data side glass substrate 2. 5 shows a portion of the data side glass substrate 2 overlapping the scanning side flexible CBs 5 and the data side flexible CBs 4.

6 illustrates an LC display device in which an electrode transition portion 3, a scanning side flexible CBs 5 and a data side flexible CBs 4 are mounted on a data side glass substrate 2 according to the present invention. The scanning side flexible CBs 5 and the data side flexible CBs 4 are pressed onto the data side glass substrate 2 through an anisotropic conductive film or the like (not shown). The scanning side flexible CBs 5 is soldered and connected to the scanning side printing CB 6.

7 is a schematic diagram illustrating the structure of the electrode transition section 3. The LC display device of FIG. 7 includes a scan side glass substrate 1, a data side glass substrate 2, a scan electrode 31 (only one is shown), a signal electrode 32 (only one is shown), and a spacer 33 ), A liquid crystal 34, an alignment film 35, a seal 36, and conductive particles 37 (only one is shown).

The electrode transition portion 3 has a scanning electrode 31 having conductive particles 37 (diameter substantially equal to the thickness of the LC layer 34) between the scanning side glass substrate 1 and the data side glass substrate 2. It is electrically coupled to the signal electrode 32 intervening.

The conductive particles 37 are formed by coating a highly conductive metal layer (for example, Au) on the flexible non-conductive particles (for example, plastic) by plating or the like. Electroconductive particle 37 is disperse | distributed to sealing resin, and the electrode transition part 3 is formed simultaneously with formation of a sealing resin.

According to the above structure, the scanning signal can be transmitted from the data side glass substrate 2 to the scanning side glass substrate 1. The relative positions of the scan side glass substrate 1 and the data side glass substrate 2 are opposite to those illustrated in FIG. 7 when the scan signal is transferred from the data side glass substrate 2 to the scan side glass substrate 1. It may be.

(Example 2)

8 is a plan view illustrating a structure of an LC display device according to a second exemplary embodiment of the present invention.

The LC display device shown in FIG. 8 includes an LC display panel 110 having a scanning side glass substrate 101 and a signal side glass substrate 102; Data-side flexible CBs 106 on which driving ICs 108 are mounted; Scan side flexible CBs 117 on which drive ICs 118 are mounted; Scanning side printing CB 103; And data-side printing CB 107. Since the scanning side glass substrate 101 and the signal side glass substrate 102 are attached to each other in the peripheral sealing region, the LC cell in which the liquid crystal is injected is formed.

In FIG. 8, the scanning side printing CB 103 is electrically coupled to the scanning side glass substrate 101 of the LC display panel 110 through the flexible printing CBs (FPC) 104.

The scanning side printing CB 103 includes a plurality of input terminals for receiving data signals and control signals. The scanning side printed CB 103 also includes a plurality of wirings extending from the plurality of input terminals to the FPCs 104.

Data signals and / or control signals input to at least one of the input terminals of the scanning side printing CB 103 are input to the scanning side glass substrate 101 through the FPCs 104. The data signal and / or the control signal flow from the scanning side glass substrate 101 to the signal line on the signal side glass substrate 102 (via an electrode transition portion formed in the non-display area inside the LC display panel such as the corner of the LC display panel). . Data signals and / or control signals are sequentially input to each flexible CBs 106 through signal lines formed on the signal side glass substrate 102.

Arrows in FIG. 8 indicate the flow direction of the data signal and / or control signal or the direction in which the power supply voltage is supplied to the power supply voltage wiring.

The signal side glass substrate 102 includes a terminal (hereinafter referred to as "display driving terminal") for driving a display coupled to the data signal line of the signal side glass substrate 102. The display driving terminal of the signal side glass substrate 102 is coupled to the output terminal of the data side flexible CBs 106.

The flexible CBs 106 are cascaded with each other. Adjacent flexible CBs 106 are electrically connected through signal lines formed on the signal side glass substrate 102 such that signals are sequentially transmitted between adjacent flexible CBs 106 via signal lines.

Flexible CBs 106 are disposed below the data side printing CB 107. Flexible CBs 106 have a power supply voltage line and an input terminal. The power supply voltage line is coupled to the input terminal. The power supply voltage line is also formed on the data side printed CB 107. The input terminals of the flexible CBs 106 are coupled to the power supply voltage line of the data side printed CB 107 so that the power supply voltage is supplied to the flexible CBs 106.

The data side printing CB 107 is coupled to the scanning side printing CB 103 via the FFCs 105. The power supply voltage line of the scanning side printing CB 103 is electrically coupled to the power supply voltage line of the data side printing CB 107 via the FFCs 105. In the LC display device of Fig. 8, driving ICs 108 for the data side are provided at the top and bottom of the device, while driving ICs 118 for the scanning side are provided only at the left end of the device.

9 is a detailed plan view illustrating each flexible CB 106 used in the second embodiment. The data side driving IC 108 is substantially mounted at the center of the flexible CBs 106. The data side driving IC 108 is coupled to the wiring of the flexible CB 106 through wire bonding. The input / output terminals 100a and 100b (including about 8-12 data signal lines and about 4 control signal lines for control signals such as LP, XCK, M, and DISP) are upper left and upper right sides of the flexible CB 106. Are provided for each. Power supply voltage lines (as well as input terminals coupled to power supply voltage lines 100c and 100d, respectively) are also provided on the lower left and lower right sides of the flexible CB 106, respectively.

In addition, on the upper side of the flexible CB 106, an output line of a few dozens of the driving IC 108 as well as the output terminal e coupled to the output line is provided. The flexible CB 106 has a symmetrical structure in form, wiring, and terminals. As a result, the signals are either output or input at the input / output terminals 100a and 100b corresponding to the data signal line and the control signal line. That is, signals may be conveyed from left to right or vice versa of flexible CB 106.

Therefore, the flexible CB 106 according to the present embodiment may be mounted on one of the lower ends or the upper ends of the surface of the signal-side glass substrate 102. Flexible CB 106 may be mounted in the opposite position.

10 is a plan view illustrating part of the signal side glass substrate 102 and the scanning side glass substrate 101 in the vicinity thereof used in the present embodiment. The scanning side glass substrate 101 and the signal side glass substrate 102 are attached to each other in the peripheral seal area to form an LC cell in which liquid crystal is injected therebetween. The LC cell (including the display area 121) is defined as an interspace between the scanning side glass substrate 101 and the signal side glass substrate 102.

The data signal line (not shown) disposed in the display area 121 is coupled to the display driving terminal 100f (about 2 mm wide) through the lead 119. The display drive terminal 100f is shown to be provided at the end of the signal side glass substrate 102. In the display area 121, the leads 119 may be coupled to corresponding display driving terminals 100f (provided at intervals of several hundreds of micrometers μm) to corresponding display driving terminals 100f (provided at intervals of several dozen micrometers). .

In the signal side glass substrate 102, the signal lines 100g to be coupled to the data signal lines of the adjacent flexible CBs 106 and the input / output terminals 100a and 100b of the control signal lines are regions in which the display driving terminals 100f are formed. It is formed between.

Simultaneously with the formation of the data signal line, the lead 119 and the display drive terminal 100f, the signal line 100g is preferably formed of the same material. In this embodiment, the signal line 100g is formed of a conductive material such as ITO (indium tin oxide).

All of the flexible CBs 106 in which the display drive terminal 100f is aligned with the output terminal 100e of the flexible CBs 106 and the signal lines 100g are aligned with the input / output terminals 100a and 100b are either anisotropic conductive sheets or anisotropic materials. It is attached to the signal side glass substrate 102 simultaneously using a conductive adhesive.

As shown in Fig. 12, the register marks 109 (shown in Fig. 9) are each flexible CB 106 in order to increase the accuracy of the crimp in the direction in which the display drive terminals 100f are arranged (the direction indicated by the arrow X). ) Is provided at the top left and top right. The register mark shown in FIG. 9 corresponds to the register mark on the signal side glass substrate 102.

11 illustrates an electrode transition portion 116 formed between the scanning side glass substrate 101 and the signal side glass substrate 102. The data signal and the control signal are supplied from the scanning side glass substrate 101 to the signal side glass substrate 102 through the electrode transition portion 116.

In the embodiment shown in Fig. 11, the scanning side printing CB 103 includes about 8-12 input terminals 103a for inputting a data signal and about 4 input terminals 103b for inputting a control signal. do. The printed wiring 103c extends from the input terminals 103a and 103b to the junction with the FPCs (input cable 104). One junction point (FIG. 13) of each FPC 104 constructed on a substrate of flame retardant vinyl is bonded to the scanning side printed CB 103. The other junction of each FPC 104 is coupled to an input terminal 100h for a data signal line and a control signal line of the scanning side glass substrate 101. The detailed structure of the FPC 104 is shown in FIG.

While the data signal, the lead 119 and the display drive terminal 100f are formed in the display area, the input terminal 100h may be formed of the same material.

The scanning side glass substrate 101 and the FPCs 104 are pressed together; The same applies to the scanning side printing CB 103 and the FPCs 104. The input terminal 100h for the data signal line and the control line of the scanning side glass substrate 101 is an electrode transition portion formed at a corner of a non-display area in the LC display panel, for example, the seal area 120 of the LC display panel. 116 is coupled to the signal line of the signal-side glass substrate 102.

14 schematically illustrates a cross section of an electrode transition 116. The electrode transition portion 116 includes a scan electrode 101a (shown only), a color filter layer 102a, a signal electrode 102b (shown only) and conductive particles (shown only). The color filter layer 102a is formed on the signal side glass substrate 102.

The electrode transition portion 116 is connected to the signal electrode 102b via the conductive particles (the diameter of which is substantially equal to the thickness of the LC layer) between the scan electrode 101a and the signal side electrode 102b. Electrically coupled.

The conductive particles are formed by coating a highly conductive metal layer 116b (eg, Au) on the flexible non-conductive particles 116a (eg, plastic) by plating or the like. Electroconductive particle is disperse | distributed to the seal resin 116c, and the electrode transition part 116 is formed simultaneously with formation of the seal resin 116c. As a result, in the seal area 120, the data side signal line 103a and the control signal line 103b are appropriately coupled to the corresponding wiring of the scanning side glass substrate 102. As shown in FIG.

The power supply voltage for the driving IC 108 is supplied from the scanning side printing CB 103 to the data side printing CB 107 via the FFC cable 105.

As shown in Fig. 11, with respect to the power supply voltage line of the scanning side printed CB 103, five parallel printed wirings 103f extend from the power supply voltage input terminal 103e to the junction with the FFC cable 105. The FFC cable 105 is coupled to the power supply voltage line j. The FFC cable 105 is crimped to the scanning side printing CB 103 and the data side printing CB 107.

15 shows the FFC cable 105 in detail. The FFC cable 105 is composed of a flameproof vinyl substrate, on which printed wirings are formed.

According to Embodiment 2, data signals and / or control signals are input to the scanning side printing CB 103. The data signal and / or control signal input to the scanning side printing CB 103 is supplied to the FPCs 104 and the electrode transition section 116. The data signal and / or control signal supplied to the signal side glass substrate 102 is supplied to the flexible CBs 106 (where the driving ICs are mounted) via the signal line 100g of the signal side glass substrate 102.

The power supply voltage is supplied from the scanning side printing CB 103 to the data side printing CB 107 via the FPC cable 105. The power supply voltage supplied to the data side printing CB 107 is supplied to the flexible CBs 106.

(Example 3)

16, 17, 18 and 19 illustrate an LC display device according to a third embodiment of the present invention.

In the description of this embodiment, the components described with reference to the structure of Embodiment 2 are denoted by the same reference numerals, and description thereof will be omitted. At least the FPCs 104, FFC cables 105 and electrode transitions 106 have the same structure as the corresponding parts described in the second embodiment.

The general structure of the apparatus of Example 3 is similar to the structure illustrated in FIG.

16 illustrates a flexible CB 106. The flexible CB 106 includes several dozen output lines, the output terminals 100e of which are provided in the central portion of the upper side of the flexible CB 106. Input / output terminals 100a 'and 100b' (including about 8-12 data signal lines and about 4 control signal lines for control signals such as LP, XCK, M, and DISP) are placed on the upper side of each of the flexible CBs 106. It is provided at the left and right ends. Power supply voltage lines (as well as input terminals coupled to the power supply voltage lines 100c and 100d respectively) are also provided on the lower left and lower right sides of the flexible CB 106, as in the second embodiment.

17 is a plan view illustrating a portion of the signal side glass substrate 102 and the scanning side glass substrate 101 in the vicinity thereof. The display drive terminal 100f, the signal line 100g ', the input / output terminals 100a' and 100b ', and the like are formed so as to match the structure of the flexible CB 106 shown in FIG.

Specifically, the display drive terminal 100f is formed on the signal side glass substrate 102. The signal line 100g 'to be coupled to the input / output terminals 100a and 100b of the data signal line and the control signal line of the adjacent flexible CBs 106 is formed between the display drive terminals 100f.

The signal line 100g 'extends U-shaped to the seal area. The signal line 100g 'coupled to the electrode transition portion 116 extends into the seal area.

In Embodiments 2 and 3, data signals and control signals are supplied from the scanning side glass substrate 101 to the signal side glass substrate 102 through the electrode transition section 116, and the power supply voltage line is connected to the scanning side printing CB 103. To the data side printing CB 107. Meanwhile, the power supply voltage line may be coupled from the scanning side glass substrate 101 to the signal side glass substrate 102 through the electrode transition unit 116, and the data signal and the control signals are transferred from the scanning side printing CB 103 to the data side. It may be supplied to the printing CB 107.

One of the data signal and the control signals can be supplied from the scanning side glass substrate 101 to the signal side glass substrate 102 through the electrode transition section 116, while the control signal and data signals in addition to the power supply voltage. The other of which may be supplied from the scanning side printing CB 103 to the data side printing CB 107.

In Embodiments 2 and 3, as described above, the data signal and the control signal are supplied from the scanning side glass substrate 101 to the signal side glass substrate 102 through the electrode transition portion 116. Meanwhile, the scan signal may be supplied from the signal side glass substrate 102 to the scan side glass substrate 101 through the electrode transition part 116.

As described above, the flexible CB according to an embodiment of the present invention includes an input terminal for receiving a data signal and a control signal (to be transmitted to the driving IC); A first output terminal for outputting a signal from the driver IC; And a second output terminal for outputting all or part of a data signal and a control signal provided on one line along one of the pair of long sides of the flexible CB. As a result, the frame-shaped peripheral region of the data side glass substrate for joining the flexible CB and the data side glass substrate can be narrowed.

The flexible CB according to another embodiment of the present invention includes a first output terminal for outputting a signal from the driver IC, and a second output terminal for outputting a signal for use in the data-side flexible CB. Second output terminals are provided along one of the pair of long sides of the flexible CB. As a result, the frame-like peripheral region of the data side glass substrate for coupling the flexible CB to the data side glass substrate can be narrowed.

According to the present invention, data signals and / or control signals are transmitted through the scanning side glass substrate and the signal side glass substrate, making it possible to effectively use any redundant regions on these substrates. Therefore, the frame peripheral area of the LC display device can be narrowed. Since the power supply voltage is supplied on the data side printing CB via the power supply voltage line, the structure of the data side printing CB can be simplified. This makes it possible to narrow the frame peripheral area of the LC display device.

Various changes can be made by those skilled in the art without departing from the scope and spirit of the invention and can be made easily. Accordingly, the scope of the appended claims should not be limited to the content as disclosed herein but should be construed broadly.

Claims (17)

In a flexible circuit board, Insulating tape with a pair of long sides and a pair of short sides; A driving IC mounted on the insulating tape; An input terminal for receiving a data signal and a control signal to be transmitted to the driver IC; A first output terminal for outputting a signal from the driver IC; A second output terminal for outputting at least a portion of the data signal and the control signal; And First and second power signal terminals for supplying voltage to the driver IC Including; The input terminal, the first output terminal and the second output terminal are provided on one of the pair of long sides, the first power signal terminal is provided on one of the pair of short sides, and the second A power supply signal terminal is provided on the other of said pair of short sides. The flexible circuit board of claim 1, wherein a notch is provided on the other of the pair of long sides. In a flexible circuit board, Insulating tape with a pair of long sides and a pair of short sides; A driving IC mounted on the insulating tape; An input terminal for receiving a signal used in the data-side flexible circuit board; A first output terminal for outputting a signal from the driver IC; And A second output terminal for outputting the signal used for the data side flexible circuit board Including; The first output terminal and the second output terminal are provided on one of the pair of long sides, and the input terminal is provided on at least one of the other of the pair of long sides and the inside of the insulating tape. Flexible circuit board characterized by the above-mentioned. 4. The flexible circuit board of claim 3, wherein the signal used for the data side flexible circuit board is at least one of a data signal, a control signal, and a power signal. In the liquid crystal display device, Scan-side glass substrates; A data side glass substrate facing the scan side glass substrate; A liquid crystal inserted between the scanning side glass substrate and the data side glass substrate; An electrode transition portion provided between the scan side glass substrate and the data side glass substrate to transfer a scan signal output from the data side glass substrate to the scan side glass substrate; And Data signal lines, control signal lines, and power signal lines provided on the data side glass substrate. Liquid crystal display comprising a. In the liquid crystal display device, A. a) a first insulating tape having a pair of long sides and a pair of short sides, b) a first driving IC mounted on the first insulating tape; c) a first input terminal for receiving a data signal and a control signal to be transmitted to said first driver IC, d) a first output terminal for outputting a signal from the first driver IC, e) a second output terminal for outputting at least a portion of the data signal and the control signal, and f) first and second power signal terminals for supplying voltage to the first driver IC Wherein the first input terminal, the first output terminal, and the second output terminal are provided on one of the pair of long sides of the first insulating tape, and the first power signal terminal is provided with the first input terminal. A data side flexible circuit board provided on one of the pair of short sides of the first insulating tape, the second power signal terminal being provided on the other of the pair of short sides of the first insulating tape; B. a) a second insulating tape having a pair of long sides and a pair of short sides, b) a second driving IC mounted on the second insulating tape, c) a second input terminal for receiving a signal used for said data side flexible circuit board, d) a third output terminal for outputting a signal from the second driver IC, and e) a fourth output terminal for outputting the signal used for the data side flexible circuit board Wherein the third output terminal and the fourth output terminal are provided on one of the pair of long sides of the second insulating tape, and the second input terminal is the pair of long of the second insulating tape. A scanning side flexible circuit board provided on at least one of the other of the sides and the inside of the second insulating tape; C. a data side glass substrate coupled to the data side flexible circuit board and the scan side flexible circuit board; D. a scanning side glass substrate opposite the data side glass substrate; E. liquid crystal inserted between the scanning side glass substrate and the data side glass substrate; F. an electrode transition portion provided between the scan side glass substrate and the data side glass substrate to transmit a scan signal output from the data side glass substrate to the scan side glass substrate; And G. Data signal line, control signal line and power signal line provided on the data side glass substrate Liquid crystal display comprising a. In the liquid crystal display device, Driving IC; A scanning side glass substrate having a first display driving terminal; A signal side glass substrate having a second display driving terminal; And An electrode transition portion provided between the scanning side glass substrate and the signal side glass substrate Including; The driving IC is coupled to the second display driving terminal of the signal side glass substrate, and the first display driving terminal of the scanning side glass substrate is used for the driving through the electrode transition portion and the second display driving terminal. A liquid crystal display device which receives a signal supplied to an IC. The liquid crystal display of claim 7, wherein the signal is at least one of a data signal and a control signal. 8. The liquid crystal display device according to claim 7, further comprising a scanning side printed circuit board for supplying the signal to the first display driving terminal of the scanning side glass substrate. 8. The liquid crystal display device according to claim 7, wherein a seal region is provided around the scan side glass substrate and the signal side glass substrate, and the electrode transition portion is formed in the seal region. In the liquid crystal display device, A scanning side glass substrate having a first display driving terminal; A signal side glass substrate having a second display driving terminal and a line; A first flexible circuit board having a first driving IC; And Second flexible circuit board with second driver IC Including; The first flexible circuit board is coupled to the scan side glass substrate, the second flexible circuit board is coupled to the signal side glass substrate, and the first flexible circuit board is the scan side glass substrate and the signal side glass substrate. And electrically coupled to the second flexible circuit board through an electrode transition portion provided therebetween. In the liquid crystal display device, A data side printed circuit board with a power line; A signal side glass substrate having a display drive terminal and a line; And A flexible circuit board, comprising: a driving IC, an output terminal for outputting a signal to a liquid crystal display panel formed on one side of the flexible circuit board, and provided on each of a pair of sides positioned at an angle with the one side; Flexible circuit board with output terminal and power terminal Including; An output terminal of the flexible circuit board is electrically coupled to the display driving terminal of the signal side glass substrate, The input / output terminal of the flexible circuit board is electrically coupled to the line of the signal-side glass substrate, The flexible circuit board has a portion overlapping with the data side printed circuit board, And the flexible circuit board is coupled to the data side printed circuit board at the overlap portion in such a manner that the power terminal is electrically coupled to the power line. 13. The liquid crystal display device according to claim 12, further comprising a scan side printed circuit board having a power supply line, wherein the power supply line of the scan side printed circuit board is coupled to a power supply line of the data side printed circuit board via an FFC cable. . In the liquid crystal display device, A data side printed circuit board having a power supply line for supplying power; A signal side glass substrate having a display drive terminal and a data side signal / control signal line; And A flexible circuit board comprising: a driving IC, an output terminal for outputting a signal to a liquid crystal display panel on one side of the flexible circuit board, and an input / output provided on each of a pair of sides formed at an angle with the one side; Flexible circuit board with output terminal and power terminal Including; The power supply terminal of the flexible circuit board is electrically coupled to the power supply line of the data side printed circuit board, The flexible circuit board has a portion overlapping with the signal side glass substrate, The flexible circuit board has the overlap portion in such a manner that the output terminal of the flexible circuit board is electrically coupled to the data side signal / control signal line and the input / output terminal of the flexible circuit board is electrically coupled to the display drive terminal. And coupled to the signal side glass substrate. The liquid crystal display of claim 7, wherein the signal is a data signal. The liquid crystal display of claim 7, wherein the signal is a control signal. 12. The method of claim 11, wherein the first flexible circuit board is coupled in contact with the scanning side glass substrate through a first contact surface, and the second flexible circuit board is coupled in contact with the signal side glass substrate through a second contact surface. And the first contact surface and the second contact surface are interposed between the scan side glass substrate and the signal side glass substrate.