JP3025764B2 - Liquid crystal display - 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
The present invention relates to a mounting structure including a CP and a circuit board.

[0002]

2. Description of the Related Art Conventionally, mounting structures of a liquid crystal panel and a driving IC in a liquid crystal display device are roughly classified into TCP (Tape).
Carrier Package) and COG (Ch)
(IP On Glass) method.

In the case of the TCP system, a liquid crystal driving IC 1 and a liquid crystal driving IC
An output signal line 2 for outputting an output from the LCD 1 to a liquid crystal panel 7 and an input signal line 3 for inputting an external signal to the liquid crystal driving IC 1 are provided.

The input signal wiring 3 of the flexible substrate 6 is electrically connected to a terminal of a circuit board 5 outside the liquid crystal panel 1, and an external signal is supplied from the terminal of the circuit board 5 to a liquid crystal driving IC.
To one.

Further, in order to obtain a highly reliable liquid crystal display device having a high drop margin of a counter electrode of a liquid crystal panel,
The counter voltage wiring 4 is formed on the liquid crystal panel 1, the flexible substrate 6, and the circuit substrate 5.

Therefore, the circuit board 5 of the TCP system requires a very large number of input wirings to supply signals to the input signal wirings 3 of the flexible substrate 6, so that four to eight conductor layers are required. Using a multilayer laminate consisting of
Its size requires a width of 5 mm to 10 mm and a thickness of 0.6 mm to 1 mm.

On the other hand, in the COG system, as shown in FIG. 6, a liquid crystal driving IC 1 is provided on a glass substrate around a liquid crystal panel 7.
And an output signal wiring 2 for outputting an output from the liquid crystal driving IC 1 to the liquid crystal panel 7, and an input signal wiring 3 for inputting an external signal to the liquid crystal driving IC 1, and a circuit outside the liquid crystal panel 7. A substrate 5 is provided, and an input signal is sent from the circuit board 5 to the input signal wiring 3 of each liquid crystal drive IC 1.

Further, in order to obtain a highly reliable liquid crystal display device having a high drop margin of a counter electrode of a liquid crystal panel,
The counter voltage wiring 4 is formed on the liquid crystal panel 7 and the circuit board 5.

As another example of the COG method, there is a method of forming a wiring for inputting a signal for the input signal wiring 3 of the liquid crystal driving IC 1 on a peripheral portion of the liquid crystal panel 7.
Wiring at the periphery of the liquid crystal panel 7 is increased, and the liquid crystal panel 7
Of the liquid crystal panel 7 becomes a multi-layered wiring, and the connection reliability is reduced.

[0010]

The circuit board 5 of the conventional TCP type liquid crystal display device has a large number of wirings for supplying an input signal to the liquid crystal driving IC 1 of the flexible substrate 6 and a signal to the counter voltage wiring 4. It is necessary to form the circuit board 5, the size of the circuit board 5 needs to be increased, and it is necessary to use a technique such as multilayer wiring, and it has been difficult to reduce the cost.

Therefore, as shown in FIG.
A wiring 8 for electrically connecting a wiring between the flexible substrates 6 adjacent to the periphery of the liquid crystal driving IC 1 is formed, and an output wiring from one liquid crystal driving IC 1 is adjacent to the other liquid crystal driving IC.
By connecting to one input wiring, the number of wirings on the circuit board can be reduced.

However, as shown in FIG.
Since the wiring 8 for electrically connecting the wiring between the adjacent flexible substrates 6 and the wiring 4 for the counter voltage cross (point A), it is necessary to use a multilayer wiring, and the connection reliability is lowered. Manufacturing costs increase.

[0013]

According to the first aspect of the present invention, a liquid crystal is interposed between a pair of substrates, and one of the substrates has a plurality of thin film transistors corresponding to pixels and a plurality of thin film transistors for driving the thin film transistors. A liquid crystal panel on which wiring is formed and a counter electrode is formed on the other substrate; and a plurality of TCPs connected to the liquid crystal panel and provided with a liquid crystal driving IC.
And a circuit board for supplying a signal to the TCP, wherein the circuit board has a first circuit for supplying a signal to the counter electrode without being electrically connected to the liquid crystal driving IC. Wiring and the TCP liquid crystal drive IC
A sixth wiring for supplying necessary signals is formed,
The TCP includes a second wire for being connected to the liquid crystal drive IC for driving a thin film transistor of the liquid crystal panel, the TCP between the adjacent connected to said liquid crystal drive IC
A third wiring provided at both ends of the second wiring for electrical connection, and a third wiring which is not electrically connected to the liquid crystal driving IC.
A fourth wiring provided between the second wiring and the third wiring for supplying a signal to the counter electrode, the liquid crystal driving IC
To provide necessary signals to the liquid crystal driving IC.
And a seventh wiring for supplying the liquid crystal panel.
An eighth wiring for driving the thin film transistors that are collectively drawn out for each corresponding TCP and an eighth wiring for electrically connecting adjacent TCPs to each other.
A fifth wiring provided at both ends of the wiring and the counter electrode;
Provided between the eighth wiring and the fifth wiring to supply a signal
Ninth wiring is formed , and the first wiring and the fourth wiring are formed.
Line, the fourth wiring and the ninth wiring, the sixth wiring and the seventh wiring
The second line and the eighth line, and the third line and the fifth line are electrically connected to each other.

According to a second aspect of the present invention, the seventh wiring is the
It is characterized in that it is formed between the second wiring and the third wiring .

The invention according to claim 3 is characterized in that at least one of the substrates of the liquid crystal panel is covered with an insulating film except at least a connection portion between the wiring of the liquid crystal panel and the wiring of the TCP. I do.

According to a fourth aspect of the present invention, in the TCP, a slit is formed between a connection portion of the liquid crystal panel and a connection portion of the circuit board, and the TCP is bent at the slit portion to form the circuit board. It is characterized by being arranged on the back side of a liquid crystal panel.

The invention according to claim 5 is characterized in that an insulating film is formed on the slit portion of the TCP.

According to a sixth aspect of the present invention, the second wiring, the third wiring, the fourth wiring, and the seventh wiring of the TCP are arranged in a straight line, and the eighth wiring of the liquid crystal panel is provided . Wiring and No.
5 are arranged on a straight line, and these wiring groups are collectively connected.

According to a seventh aspect of the present invention, the liquid crystal driving IC of the TCP is disposed on a panel, and a connection portion between the TCP and the liquid crystal panel is disposed outside the liquid crystal driving IC.

According to an eighth aspect of the present invention, in the TCP, the terminal pitch of the fourth wiring is larger than the terminal pitch of the second wiring by the terminal pitch of the second wiring + the liquid crystal driving IC non-mounting area TCP dimension × 0. .25% <the terminal pitch of the fourth wiring is designed to be wide.

According to a ninth aspect of the present invention, the third wiring in the TCP has a portion where a terminal width is partially increased in a part of an electrical connection portion.

The operation of the present invention will be described below.

According to the liquid crystal display device of the first aspect of the present invention, in the liquid crystal display device in which the wiring which is not electrically connected to the liquid crystal driving IC is formed on the TCP and the wiring is connected to the liquid crystal panel, When the electrical connection of the wiring with the adjacent TCP is connected using the wiring of the liquid crystal panel,
Wiring that is not electrically connected to the liquid crystal driving IC and wiring that electrically connects the TCP and the adjacent TCP can be wired without intersecting.

Also , since the input signal to the liquid crystal driving IC can be obtained from both the liquid crystal panel side and the circuit board side, the input signal lines from the circuit board side to the liquid crystal driving IC are narrowed down to a few power supply lines to prevent voltage drop. More than ten to twenty more input signal lines can be connected to the liquid crystal panel. As a result, the area, the number of wiring layers, the thickness, and the cost of the circuit board can be significantly reduced by 50% or more.

According to the liquid crystal display device according to the third aspect of the present invention, at least the portion of the liquid crystal panel other than the connection with the TCP wiring is covered with the insulating film.
Conventionally, the wiring for driving the thin film transistor, which could only be routed inside the sealing portion of the opposite side glass of the liquid crystal panel, can be extended to the region outside the sealing portion, so that the routing wire angle and the wiring width are widened, The non-defective rate of the wiring forming process on the panel can be improved.

According to the liquid crystal display device according to the fourth aspect of the present invention, since the circuit board can be disposed at the back side of the liquid crystal panel by bending at the slit portion of the TCP, a liquid crystal display device having a small frame can be manufactured.

According to the liquid crystal display device of the present invention, since the insulating film is formed on the slit portion of the TCP, the strength of the bent portion is improved and the conductive foreign matter adheres to the wiring portion from the outside. As a result, a liquid crystal display device having high vibration resistance and high shock resistance free from electrical defects due to the above-mentioned problems can be obtained.

According to the liquid crystal display device of the present invention, the TCP and the liquid crystal, which are necessary for connecting the TCP and the liquid crystal panel, are connected to the liquid crystal driving IC and supply a signal for driving the thin film transistor of the liquid crystal panel. Connection of panel terminal group, connection of TCP not electrically connected to liquid crystal driving IC and connection of terminal group of liquid crystal panel, adjacent T
By arranging these terminal groups on a straight line, the three types of connection, TCP and the terminal group of the liquid crystal panel for electrical connection between CPs, can be connected collectively with a linear crimping tool. , Which reduces man-hours.

According to the liquid crystal display device of the present invention, the TCP which has conventionally been arranged at the periphery of the liquid crystal panel
Since the liquid crystal driving IC is disposed on the panel, the space around the panel can be reduced, and a thin liquid crystal display device can be manufactured. The TC between the panel terminal and the liquid crystal driving IC
In the P wiring, disconnection failures have been seen to some extent in the past,
Since it is arranged on a panel where displacement is small with respect to bending stress, reliability can be improved.

According to the liquid crystal display device of the present invention, when the TCP and the liquid crystal panel are thermocompression-bonded, a dimensional deviation between the panel terminal and the TCP terminal occurs due to thermal expansion and contraction of the TCP, but the IC itself is thermally contracted. Because it is hardly affected by
The second wiring of the TCP, which is arranged near the liquid crystal driving IC of the TCP, has almost no dimensional deviation. On the other hand, the fourth wiring of the TCP, which is arranged at a position separated from the liquid crystal driving IC of the TCP, is the liquid crystal driving IC.
Since it is not affected by C, the amount of heat shrinkage becomes large and easy. Therefore, the night vision pitch of the fourth wiring is set to be larger than the second wiring pitch by the amount of heat shrinkage, so that TC
The non-defective product in the connecting process between the P and the panel can be reduced to improve the non-defective product rate.

According to the liquid crystal display device of the ninth aspect of the present invention, the third wiring of the TCP according to the present invention is connected only to the liquid crystal panel and does not need to be connected to the circuit board. It can be designed at a narrower pitch than the first wiring and the sixth wiring of the substrate. Therefore, in order to reduce the outer size of the TCP, it is desired to reduce the third wiring pitch. However, since it is necessary to conduct an electrical inspection in the TCP manufacturing process, it is necessary to reduce the terminal pitch to the limit. could not. Here, since the terminal width is partially increased in a part of the electrical connection portion of the third wiring, the electrical inspection in the TCP manufacturing process is easily performed, and the third wiring pitch is reduced. The outer size of the TCP can be reduced.

[0032]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A liquid crystal display according to an embodiment of the present invention will be described with reference to FIGS. 1 (a), 1 (b), 1 (c) and 2. FIG. FIG. 1A is a diagram illustrating a peripheral portion of the liquid crystal panel 10, FIG. 1B is a diagram illustrating a TCP 24, and FIG. 1C is a diagram illustrating a circuit board 30. FIG. 2 is a diagram showing a configuration in which the TCP 24 and the circuit board 30 are connected to the liquid crystal panel 10.

The liquid crystal panel 10 shown in FIG. 1A will be described.

In the liquid crystal panel 10, a liquid crystal is interposed between a pair of glass substrates, and one of the glass substrates is an active matrix substrate on which a thin film transistor connected to a pixel electrode and a gate wiring and a source wiring for controlling the thin film transistor are formed. And the other glass substrate is a counter substrate on which a counter electrode is formed.

As shown in FIG. 1A, the periphery of the active matrix substrate is larger than that of the counter substrate, and a region for connecting the wiring of the active matrix substrate and the external wiring is provided.

A plurality of source wirings 11 are formed on the periphery of the liquid crystal panel 10, wirings 12 for the counter voltage of the liquid crystal panel 10 for supplying a counter voltage to the counter electrode are formed on both sides thereof, and adjacent to the outside thereof. The connection wiring 13 for connecting the wirings of the liquid crystal drive IC 20 provided in the two TCPs 24 to each other is formed.

The counter voltage wiring 12 of the liquid crystal panel 10
The liquid crystal panel 10 is electrically connected to a counter electrode formed on a counter substrate by a counter electrode transition portion 14 made of a conductive material provided in a seal portion of the liquid crystal panel 10.

The wiring of the liquid crystal panel 10 and the TCP 24
All portions other than the connection portion with the wiring are covered with an insulating film.

Next, the TCP 24 shown in FIG. 1B will be described.

The source wiring output wiring 21 is formed near the center of one side of the TCP 24 and is a wiring for outputting a signal voltage from the liquid crystal driving IC 20 to the source wiring 11 of the liquid crystal panel 10.

The counter voltage wiring 22 of the TCP 24 is formed at both ends of the source wiring output wiring 21, and is connected to the circuit board 30.
This is a wiring for electrically connecting the counter voltage wiring 32 and the counter voltage wiring 12 of the liquid crystal panel 10, and is not electrically connected to the liquid crystal drive IC 20.

The first input wiring 23 is formed outside the counter voltage wiring 22 of the TCP 24 and is a wiring for inputting a signal necessary for driving the liquid crystal driving IC 20. One end of the first input wiring 23 is connected to the liquid crystal driving IC 20. The other end is connected to the connection terminal 33 of the signal input wiring 31 of the circuit board 30. In the present embodiment, two first input wirings 23 are formed for each TCP, but one or more first input wirings 23 may be provided.

The second input wiring 25 is a wiring for inputting a signal necessary for driving the liquid crystal driving IC 20. One end is connected to the liquid crystal driving IC 20 and the other end is connected to the liquid crystal panel 10. Connected to wiring 13.

The adjacent liquid crystal drive IC output wiring 26 is
This is a wiring for outputting a signal necessary for a liquid crystal driving IC provided in an adjacent TCP, and one end is connected to a liquid crystal driving IC.
The other end is connected to the connection wiring 13 of the liquid crystal panel 10.

Next, the circuit board 30 shown in FIG. 1C will be described.

The signal input wiring 31 is a wiring for sending a voltage to the first input wiring 23 of the TCP 24,
The counter voltage wiring 32 is a wiring for sending a voltage to the counter voltage wiring 12 of the liquid crystal panel 10 via the TCP 24. Since an insulating film is formed on the signal input wiring 31 and the counter voltage wiring 32 of the circuit board 30, the signal input wiring 31 and the TCP wiring are used to electrically connect the wiring of the circuit board and the TCP wiring. A contact hole is formed in the insulating film on the counter voltage wiring 32, and the TCP wiring and the wiring of the circuit board are electrically connected by the connection wirings 33 and 34 formed on the contact hole.

Liquid crystal panel 10, TCP 24 and circuit board 3
The connection method of 0 is shown below. The source line 11 of the liquid crystal panel 10 and the output line 21 for the source line of the TCP 24, the counter voltage line 12 of the liquid crystal panel 10 and the counter voltage line 22 of the TCP 24, the connection line 13 of the liquid crystal panel 10 and the TCP
24, a connection wiring adjacent to the connection wiring 13 via a source wiring, and an output wiring 26 for a liquid crystal driving IC adjacent to the TCP 24 are aligned with each other, and electrically connected with an anisotropic conductive film or the like. Connection.

Here, output wiring 2 for source wiring of TCP
1 (second wiring), adjacent liquid crystal drive IC output terminal 2
6 (third wiring), the counter voltage wiring 22 (fourth wiring), and the first input wiring 23 (seventh wiring) can also be arranged on a straight line. Can be connected.

Next, the counter voltage wiring 22 of the TCP 24 and the connection wiring 34 of the circuit board 30,
4, the first input wiring 23 and the connection wiring 33 are aligned and electrically connected with an anisotropic conductive film or solder.

In this way, the input signal from the signal input wiring 31 of the circuit board 30 to the liquid crystal drive IC 20 is
The adjacent TCP via the connection wiring 13 of the liquid crystal panel 10
Is input.

The counter voltage of the counter electrode of the liquid crystal panel is changed from the counter voltage wiring 32 of the circuit board 30 to the TCP 24.
Is input through the counter voltage wiring 12 of the liquid crystal panel 10.

In the present embodiment, since at least one counter electrode transition portion 14 for applying a counter voltage to the counter electrode of the liquid crystal panel 10 is formed on the periphery of the liquid crystal panel at least one by one with respect to the TCP 24, the voltage drop margin is high. A highly reliable liquid crystal display device can be obtained.

Further, since the counter voltage wiring 12 of the liquid crystal panel 10 connected to one counter electrode transition portion 14 is connected to each counter voltage wiring of the adjacent TCP 24, the counter voltage of sufficient power is provided. Can be applied to the counter electrode,
Further, even if a voltage is not input from the counter voltage wiring of one TCP 24 due to disconnection or poor connection, the counter voltage is applied to the counter electrode by the counter voltage wiring of the TCP 24 connected to the other.

The connection wiring 13 and the like formed on the liquid crystal panel 10 are formed of the same material as the internal wiring and the like of the liquid crystal panel 10 in order to save space at the periphery of the liquid crystal panel and to simplify the process. Since it is difficult to make the resistance value sufficiently small, the input power supply or the like which is disadvantageous to the high resistance among the signals necessary for driving the liquid crystal drive IC 20 is connected to the circuit board 30 and the first input wiring of the TCP 24. And input to the liquid crystal drive IC.

Since the wiring of the circuit board 30 is a separate substrate from the liquid crystal panel 10, there is no particular restriction that the wiring becomes a high-resistance wiring, so that a low-resistance wiring can be formed.

Therefore, the counter voltage applied to the counter electrode is also
If a high resistance wiring formed on the liquid crystal panel 10 is routed and connected to the counter electrode, a voltage drop or a rounded waveform occurs, and a desired counter voltage cannot be applied to the counter electrode.

In the present embodiment, by partially inputting an input signal to the liquid crystal driving IC via the connection wiring 13 of the liquid crystal panel, the number of wirings on the circuit board 30 is reduced.
It is possible to reduce the cost of the circuit board 30 and the mounting area. Actually, in the case of a thin film transistor type liquid crystal display device, the number of input signals is required to be 23 to 25 and the number of input power supplies is required to be about 8 to 10. However, the number of wirings of the circuit board 30 is reduced to 8 to 10 such as input power supplies. By doing so, a double-sided circuit board can be used, and the width of the circuit board can be reduced to half. in addition,
The liquid crystal driving IC of the TCP, which has conventionally been arranged at the periphery of the liquid crystal panel, is arranged on the panel, so that the cost can be reduced and the mounting area can be reduced.

Next, another example of the TCP 24 is shown in FIG.
This is provided with a bending slit 25 in the TCP 24.

FIG. 4 is a side view of a liquid crystal display device using the TCP 24 shown in FIG.

The liquid crystal panel 10 includes an active matrix substrate 40 and a counter substrate 41.

After the TCP 24 is connected to the active matrix substrate 40 and the circuit board 30 of the liquid crystal panel 10, the TCP 24 is bent at the slits 42 to arrange the circuit board 30 on the back side of the active matrix substrate 40.

Further, an insulating film may be formed on the slit portion of the TCP 24.

In the present embodiment, the description has been made on the source wiring side of the active matrix liquid crystal panel. However, the present invention can be applied to the gate wiring side and the same effects can be obtained.

FIG. 8 shows improvement items in the TCP design. Terminal pitch P1 of output terminal group from liquid crystal drive IC
Is almost the same as the bump pitch of the driver IC. On the other hand, the wiring for connection with the adjacent TCP, which is arranged at a position distant from the IC, is designed within a range satisfying P1 + IC non-mounting area TCP dimension (L) × 0.25% <P2. Here, 0.25% can be a stable connection in which no problem due to misalignment occurs in the IC non-mounting area when polyimide is used as the TCP base material.

The wiring for connection to the adjacent TCP has a portion where the terminal width is partially increased at a part of the electrical connection portion. By applying a probe to this bulge,
An electrical inspection is performed in the TCP manufacturing process. Thus, the outer size of the TCP can be reduced.

[0066]

According to the liquid crystal display device of the present invention, the TCP
A wiring that is not electrically connected to the liquid crystal driving IC,
In a liquid crystal display device in which the wiring is connected to a liquid crystal panel, when the electrical connection between the TCP and the adjacent TCP is connected using the wiring of the liquid crystal panel, a liquid crystal driving IC is used.
Wiring not electrically connected to the
Since wiring can be performed without intersecting with wiring for electrically connecting the wiring to P, an inexpensive liquid crystal display device can be obtained without using expensive multilayer wiring or the like.

Further, since the input signal to the liquid crystal driving IC can be obtained from both the liquid crystal panel side and the circuit board side, the input signal lines from the circuit board side to the liquid crystal driving IC are narrowed down to a few power supply lines to prevent voltage drop. More than ten to twenty more input signal lines can be connected to the liquid crystal panel. As a result, the area, the number of wiring layers, the thickness, and the cost of the circuit board can be significantly reduced by 50% or more.

Also, at least T
Since all parts other than the connection part with the CP wiring are covered with the insulating film, the wiring of the wiring for driving the thin film transistor, which could only be drawn inside the sealing part of the glass on the opposite side of the liquid crystal panel in the past, is used as the sealing part. Since the wiring is extended to the outer region, the leading wiring angle and the wiring width can be widened, and the non-defective rate of the wiring forming process on the panel can be improved.

Further, since the circuit board can be arranged on the back side of the liquid crystal panel by bending at the slit portion of the TCP, a liquid crystal display device having a small frame can be manufactured.

Further, by forming an insulating coating on the slit portion of the TCP, it is possible to improve the strength of the bent portion and to achieve high vibration resistance and high shock resistance without electrical trouble due to the attachment of conductive foreign matter from the outside to the wiring portion. A liquid crystal display device is obtained.

[Brief description of the drawings]

FIG. 1A is a diagram illustrating a peripheral portion of a liquid crystal panel 10. FIG. (B) is a diagram showing the TCP 24. (C) is a diagram showing the circuit board 30.

FIG. 2 is a diagram showing a configuration in which a TCP 24 and a circuit board 30 are connected to the liquid crystal panel 10.

FIG. 3 is a diagram illustrating another example of the TCP 24 of the present embodiment.

FIG. 4 is a side view of a liquid crystal display device using the TCP 24 of FIG.

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

FIG. 6 is a diagram showing a conventional COG liquid crystal display device.

FIG. 7 is a diagram showing a liquid crystal display device according to a modification of the conventional TCP system.

FIG. 8 is a diagram showing another example of TCP.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Liquid crystal panel 11 Source wiring 12 Wiring for counter voltage of liquid crystal panel 13 Connection wiring 14 Counter electrode transition part 20 Liquid crystal drive IC 21 Output wiring for source wiring 22 Wiring for counter voltage of TCP 23 First input wiring 24 TCP 25 Second input Wiring 26 Adjacent LCD drive IC output wiring 30 Circuit board 31 Signal input wiring 32 Wiring for counter voltage of circuit board 33, 34 Connection wiring

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-218933 (JP, A) JP-A-6-250199 (JP, A) JP-A-6-301047 (JP, A) JP-A-2- 132418 (JP, A) JP-A-7-36053 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G02F 1/1345

Claims (9)

(57) [Claims] 1. A liquid crystal is interposed between a pair of substrates, a plurality of thin film transistors corresponding to pixels and a plurality of wirings for driving the thin film transistors are formed on one substrate, and a counter electrode is formed on the other substrate. LCD panel,
A plurality of TCP in which the liquid crystal drive IC connected to the liquid crystal panel is provided, in a liquid crystal display device that includes a circuit board supplying a signal to the TCP, the circuit board, the electrically the liquid crystal driving IC A first wiring for supplying a signal to the counter electrode without being connected
And supplies necessary signals to the liquid crystal driving IC of the TCP.
Sixth wiring and is formed for, in the TCP, the liquid crystal driving IC and the connected second wiring for driving the TFT of the liquid crystal panel, TCP between adjacent connected to said liquid crystal drive IC To
A third wiring provided at both ends of the second wiring for electrical connection, and a third wiring which is not electrically connected to the liquid crystal driving IC.
A fourth wiring provided between the second wiring and the third wiring for supplying a signal to the counter electrode, the liquid crystal driving IC
To provide necessary signals to the liquid crystal driving IC.
A seventh wiring for feeding is formed on the liquid crystal panel, eighth and wiring for driving the single TCP summarized in the thin film transistor drawn for each corresponding, the TCP with adjacent Electrically connected
A fifth wiring provided at both ends of the eighth wiring ,
In order to supply a signal to the counter electrode, an eighth wiring and a fifth
A ninth wiring provided between the wirings is formed , and the first wiring and the fourth wiring, the fourth wiring and the ninth wiring,
6, a seventh wiring, a second wiring and an eighth wiring, a third wiring
The liquid crystal display device , wherein the wiring and the fifth wiring are electrically connected to each other. 2. The seventh wiring comprises a second wiring and a third wiring.
The liquid crystal display device according to claim 1, wherein the liquid crystal display device is formed between the two . 3. The liquid crystal panel according to claim 1, wherein one substrate of the liquid crystal panel is entirely covered with an insulating film except for at least a connection portion between the liquid crystal panel wiring and the TCP wiring. 3. The liquid crystal display device according to 2. 4. The TCP has a slit formed between a connection part of the liquid crystal panel and a connection part of the circuit board, and the TCP is bent at the slit part to dispose the circuit board on the back side of the liquid crystal panel. 2. The method according to claim 1, wherein
The liquid crystal display device according to claim 3. 5. The liquid crystal display device according to claim 1, wherein an insulating film is formed on a slit portion of the TCP. 6. A second wiring, a third wiring of the TCP,
The fourth wiring and the seventh wiring are arranged on a straight line, the eighth wiring and the fifth wiring of the liquid crystal panel are arranged on a straight line, and these wiring groups are collectively connected. The liquid crystal display device according to claim 1, wherein: 7. The liquid crystal driving IC of the TCP is disposed on a panel, and a connection portion between the TCP and the liquid crystal panel is a liquid crystal driving IC.
The liquid crystal display device according to claim 6, wherein the liquid crystal display device is arranged outside C. 8. In the TCP, the terminal pitch of the fourth wiring is set to be larger than the terminal pitch of the second wiring by the terminal pitch of the second wiring + the liquid crystal driving IC non-mounting area TC.
8. The liquid crystal display device according to claim 7, wherein the dimension is designed to be broad: P dimension × 0.25% <terminal pitch of fourth wiring. 9. The liquid crystal display according to claim 1, wherein the third wiring in the TCP has a portion where a terminal width is partially increased in a part of an electrical connection portion. apparatus.