JP3066569B2 - 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 device as a liquid crystal display mounted on a portable television, a wall-mounted television, and portable OA equipment.

[0002]

2. Description of the Related Art A liquid crystal display panel is generally configured so that a liquid crystal material is sandwiched between two opposing substrates, and a voltage is selectively applied to the liquid crystal material. For example, on at least one of the substrates, a pixel electrode made of a transparent conductive film arranged in a matrix is provided, and a switching element such as a transistor for selectively applying a voltage is provided for each of the pixel electrodes to increase transmittance. Control is performed for each pixel.

In recent years, the reduction in yield due to line defects has become a problem with the increase in the definition of displays, and it has become important to establish this line defect remedy technique.

FIG. 5 shows, for example, Japanese Patent Application Laid-Open No. 05-203986.
FIG. 6 is a plan view showing a conventional liquid crystal display device described in
FIG. 6 is a sectional view showing a point Q and a peripheral portion thereof in a section taken along line BB in FIG. 5. 5 and 6, 1 is a transparent insulating substrate, 2 is a gate signal line, 23 is a source signal line,
4 is a thin film transistor, 5 is a terminal, 6 is an intersection, 7 is an insulating film, 8 is a display area, 10 is a disconnection defect, and 29 is an auxiliary wiring. The auxiliary wiring 29 is disposed so as to go around the periphery of the display area 8, and forms the intersection 6 as an orthogonal part with the source signal line 23 via the insulating film 7.

In such a liquid crystal display device, the insulating film 7 is broken by irradiating the laser to the intersections 6 formed at both ends of the source signal line 23 where the disconnection 10 has occurred, and the source signal line 23 and the auxiliary wiring The disconnection is repaired by electrically connecting 29.

In such a liquid crystal display device, disconnection of the gate signal line 2 and the source signal line 23 and short circuit between the gate signal line 23 and the source signal line 23 are likely to occur. Disconnection or short circuit may be caused by internal stress of the metal film of the gate signal line 2 or the source signal line 23, introduction of a defect during pattern formation,
This is caused by a defect such as a step coverage of a metal film at a step portion shown in FIG. In any case, a line defect occurs as it is, and a display panel having the line defect cannot be used as a product. Of the above-mentioned defects, short-circuit defects can be repaired by cutting the source signal line 23 with a laser before and after the short-circuit point. However, the cut signal line becomes a disconnection defect. After all, it can be understood from the above that the disconnection defect becomes a problem.
The above-mentioned method using a laser beam has been proposed as a means for repairing this.

In addition, since the auxiliary wiring 29 is formed inside the panel in the above-described method, it is possible to confirm whether or not a line defect has been repaired before mounting a high-value-added external circuit. is there.

[0008]

However, in the liquid crystal display device as shown in FIG. 5, the auxiliary wiring 29 forms the intersection 6 with all the source wirings 23. This intersection 6
In this case, a parasitic capacitance (having a magnitude of about 0.2 pF) is generated, so that the source signal line 23 whose line has been repaired has a larger capacitance than a source signal line having no line break.

In recent years, the number of signal lines has been increasing as a result of advances in high definition and color display. For example, in the SVGA (super video graphic array) class, the number of gate signal lines 2 is 600 and the number of source signal lines 23 is 2400. If a disconnection occurs near the center of the screen, the total capacity of the repaired signal line is 700 pF
And the capacitance of the source signal line 23 alone is about 100 pF, which is seven times as large. The resistance including the output resistance of the external circuit for inputting the signal through the terminal 5 is about 10 kΩ for both the repaired signal line and the unrepaired signal line. Therefore, the time constant of the signal after the repair is 7 times (7 μs).
As a result, the signal delay becomes remarkable and appears as a line defect in an actual display (that is, the line defect cannot be repaired).

In order to suppress the above-mentioned restored signal time constant, that is, the parasitic capacitance of the restored signal line, for example, FIG.
As described above, the configuration described in Japanese Patent Application Laid-Open No. 3-85525 has been proposed. FIG. 7 is a plan view showing a conventional example. In FIG. 7, reference numerals 1 to 8, 23, and 29 indicate the same parts as those shown in FIG. Reference numeral 51 indicates a dummy terminal. FIG. 8 is an explanatory view showing a method of repairing a disconnection defect in a conventional liquid crystal display. In FIG. 8, reference numerals 1 to 10, 23, 29 and 51 indicate the same parts as those shown in FIG. Reference numeral 21 indicates a driver IC circuit board, reference numeral 22 indicates a control circuit circuit board, and 52
Indicates a wiring, and 91 indicates a wiring. In the above-described conventional example, the source signal lines 23 are divided into a group of a group, and the auxiliary wiring 29 is formed so as to form the intersection 6 only with the group of the source signal lines 23.
Are connected to the dummy terminals 51 provided at both ends of the. Then, as shown in FIG. 8, electrical continuity is established through dummy wirings 52 and wirings 91 provided on the driver IC board 21 and the control circuit board 22 mounted on the panel, respectively.

In the conventional example, the number of source signal lines 23 crossing the auxiliary wiring 29, that is, the parasitic capacitance is reduced. Therefore, the signal delay is at a level without any problem. However, the repair cannot be confirmed until the driver IC board 21 and the control circuit board are mounted. Therefore, if the conduction of the connecting portion is insufficient, these expensive substrates are also discarded, which is extremely disadvantageous in cost.

The present invention has been made in order to solve such a problem, and an object of the present invention is to provide a liquid crystal display device capable of suppressing a signal delay and repairing a disconnection advantageous in cost.

[0013]

According to the present invention, there is provided a liquid crystal display device comprising: a plurality of gate signal lines disposed on a transparent insulating substrate in parallel and at equal intervals; and a plurality of gate signal lines orthogonal to and parallel to the gate signal lines. A plurality of source signal lines disposed at equal intervals; a thin film transistor provided at each intersection of the gate signal line and the source signal line; one end of each of the gate signal lines and the source; A terminal provided at one end of each of the signal lines, an insulating film formed to cover the gate signal line and a peripheral portion of the terminal, and a peripheral portion of a display region provided with the thin film transistor and a plurality of auxiliary wires disposed so as to surround a plurality of source signal lines are divided into groups of a plurality present adjacent to each other, the left display region
The opposite end of the source wiring group near the right end on the opposite side
The source does not cross the auxiliary wiring and is located near the center of the display area.
The end of the source wiring group opposite to the terminal crosses the auxiliary wiring on the outside.
And the inner auxiliary wiring is located near the center of the display area.
Do not cross the end of the source wiring group opposite the terminal, and
Intersects with the opposite end of the source wiring group near the right end
As described above , the external extension of the source signal line outside the display area is determined, and the circumference of the auxiliary wiring is determined, whereby the source signal line and the auxiliary wiring are formed.

It is preferable that the insulating film is made of any one of Si ₃ N ₄ , SiO ₂ and Ta ₂ O ₅ because the auxiliary wiring and the source signal line can be electrically connected by thermal spraying by laser irradiation. .

A liquid crystal display device according to the present invention comprises a plurality of gate signal lines disposed on a transparent insulating substrate in parallel and at equal intervals, and a plurality of gate signal lines orthogonal to and parallel to and at equal intervals to the gate signal lines. A plurality of source signal lines, a thin film transistor provided at each intersection of the gate signal line and the source signal line, and one end of each of the gate signal lines and one of the source signal lines A first insulating film formed to cover the gate signal line, a second insulating film formed to cover the peripheral portion of the terminal, and the thin film transistor. is made the peripheral portion of the display area formed by a plurality of auxiliary wires disposed so as to surround the plurality of source signal lines are divided into groups of a plurality of increments that are adjacent to each other, left and right display areas both Anti end of the source line group in the vicinity of
The child side end does not intersect with the outer auxiliary wiring and is in the display area.
The end opposite to the terminal of the group of source wirings near the center is located outside the front.
The auxiliary wiring intersects with the auxiliary wiring and the inner auxiliary wiring
Intersecting with the end of the source wiring group on the opposite side of the terminal near the center
And the opposite ends of the source wiring group near the left and right ends of the display area.
So as to cross the slave end, determines the circumferential length of the auxiliary line with extension length of the source signal line at the outside of the display area is determined, thereby Ru formed source signal line and the auxiliary wiring .

The second insulating film is made of Si ₃ N ₄ and SiO
It is composed of any of the _two is preferred since the auxiliary wiring and the source signal line by spraying by laser irradiation can be electrically connected.

According to the liquid crystal display device of the present invention, there are provided a plurality of gate signal lines disposed on a transparent insulating substrate in parallel and at equal intervals, and a plurality of gate signal lines orthogonal to the gate signal lines and disposed in parallel and at equal intervals. A plurality of source signal lines, a thin film transistor provided at each intersection of the gate signal line and the source signal line, and one end of each of the gate signal lines and one of the source signal lines A terminal provided at an end of the TFT, an insulating film formed to cover the gate signal line and the peripheral portion of the terminal, and a peripheral portion of a display region in which the thin film transistor is disposed. The plurality of source signal lines are divided into a plurality of groups adjacent to each other, and a source signal line belonging to the group is assigned to a specific auxiliary wiring for each of the groups. The length of the source signal line outside the display region is determined and the length of the auxiliary wiring is determined so that the source signal line and the auxiliary signal line may intersect with each other via the insulating film. Wiring is formed, and the metal pattern film extends over the auxiliary wiring so as to be orthogonal to the plurality of auxiliary wirings, and the metal pattern film is positioned on a boundary line for each group, so that the insulation is performed. It is formed via a film.

The insulating film is made of Si ₃ N ₄ , SiO ₂ and T
It is preferable to use any one of a ₂ O ₅ because the auxiliary wiring and the source signal line or the auxiliary wiring and the metal pattern film can be electrically connected by thermal spraying by laser irradiation.

A liquid crystal display device according to the present invention comprises a plurality of gate signal lines disposed on a transparent insulating substrate in parallel and at equal intervals, and a plurality of gate signal lines orthogonal to and parallel to and at equal intervals to the gate signal lines. A plurality of source signal lines, a thin film transistor provided at each intersection of the gate signal line and the source signal line, and one end of each of the gate signal lines and one of the source signal lines A first insulating film formed to cover the gate signal line, a second insulating film formed to cover the peripheral portion of the terminal, and the thin film transistor. And a plurality of auxiliary wirings arranged so as to go around the periphery of the display area. The plurality of source signal lines are divided into a plurality of groups adjacent to each other. The The external extension of the source signal line outside the display region is determined and the peripheral length of the auxiliary line is set so that the source signal line belonging to Is determined, thereby forming a source signal line and an auxiliary wiring,
A metal pattern film is formed via the insulating film such that the metal pattern film extends over the auxiliary wiring so as to be orthogonal to the plurality of auxiliary wirings and the metal pattern film is positioned on a boundary line for each group. It is characterized by the following.

The second insulating film is made of Si ₃ N ₄ and SiO
It is preferable that any one of the _two is used because the auxiliary wiring and the source signal line or the auxiliary wiring and the metal pattern film can be electrically connected by thermal spraying by laser irradiation. Multiple liquid crystal display device of the present invention includes a plurality of gate signal lines disposed in parallel at equal intervals on a transparent insulating substrate, perpendicular to the gate signal line, and arranged in parallel at equal intervals A source signal line, and a thin film transistor provided at each intersection of the gate signal line and the source signal line,
A terminal provided at one end of each of the gate signal lines and one end of each of the source signal lines, and an insulating film formed so as to cover the gate signal line and the peripheral portion of the terminal. A liquid crystal display device comprising: a plurality of auxiliary wirings arranged so as to circumscribe a peripheral portion of a display area in which the thin film transistors are arranged, wherein the plurality of source signal lines are adjacent to each other. In the source wiring group, the one whose end on the opposite terminal side intersects the outer auxiliary wiring intersects only the outer auxiliary wiring, and the source wiring group has the opposite end. The external extension of the source signal line outside the display region is determined and the auxiliary wiring is determined so that the terminal side end crossing the inner auxiliary wiring intersects only the inner auxiliary wiring. Determined circumferential length, whereby the source signal line and the auxiliary line is formed. The liquid crystal display device according to the present invention includes a plurality of gate signal lines arranged on the transparent insulating substrate in parallel and at equal intervals, and a plurality of gate signal lines orthogonal to the gate signal lines and arranged in parallel and at equal intervals. A source signal line, a thin film transistor provided at each intersection of the gate signal line and the source signal line, one end of each of the gate signal lines and one end of each of the source signal lines , A first insulating film formed to cover the gate signal line, a second insulating film formed to cover the periphery of the terminal, and the thin film transistor are provided. A liquid crystal display device comprising a plurality of auxiliary wirings arranged so as to go around a peripheral portion of a display area, wherein the plurality of source signal lines are divided into a plurality of groups adjacent to each other, and In the wiring group, the one whose end opposite to the terminal intersects with the outer auxiliary wiring intersects only the outer auxiliary wiring, and the other end of the source wiring group whose end opposite to the terminal is inside the auxiliary wiring. The outer extension of the source signal line outside the display area is determined and the circumference of the auxiliary wiring is determined so that a line crossing the wiring intersects only the inner auxiliary wiring. And auxiliary wiring are formed.

[0021]

FIG. 1 shows an embodiment of the present invention.
This will be described with reference to FIG. FIG. 1 is a plan view of a liquid crystal display device showing one embodiment of the present invention, and FIG. 2 is a cross-sectional view showing a point P and a peripheral portion thereof along a line AA in FIG. 1 and 2, reference numeral 1 denotes a transparent insulating substrate;
Are gate signal lines arranged at regular intervals and in parallel on the transparent insulating substrate; 3 are source signal lines arranged at regular intervals and in parallel on the transparent insulating substrate and orthogonal to the gate signal lines; Is a thin film transistor provided at each intersection of the gate signal line and the source signal line, 5 is a terminal provided at each end of the gate signal line and one end of the source signal line, 6 is an intersection, and 7b is A second insulating film formed to cover the periphery of the terminal, 8 is a display region where a thin film transistor is provided, 9 is an auxiliary wiring, and 10 is a disconnection defect. Since FIG. 1 is a plan view, the insulating film 7 is not shown. Source signal lines are divided into groups of several source signal lines. In each group, each group is arranged such that the source signal lines include a plurality of source signal lines adjacent to each other. In the insulating film 7, a portion formed in the display region is referred to as a first insulating film 7a (not shown), and a portion formed outside the display region is referred to as a second insulating film 7b.
The two insulating films 7a and 7b are collectively referred to as an insulating film 7. A plurality of the auxiliary wirings 9 are provided so as to go around the periphery of the display area 8, and are orthogonal to the source signal line 3 via the second insulating film 7 b to form an intersection 6.

As shown in FIG. 1, a gate signal line, a source signal line, a thin film transistor, and an auxiliary wiring are formed on a transparent insulating substrate, and a portion of the insulating film inside a display area is a first insulating film. The arrangement in which the portion of the insulating film outside the display region is the second insulating film has the same configuration as the conventional example. In the present invention, the group of source signal lines 3 near the left and right ends of the display area 8 is formed such that the end opposite to the terminal 5 does not intersect the outer auxiliary wiring 9. Therefore, a significant feature is that a connection portion with the auxiliary wiring 9 is not formed. On the other hand, the opposite end intersects the outer auxiliary wiring 9 and the respective end element 5 is a group of the source signal line 3 in the vicinity of the center portion of the display region 8.

Furthermore, the inside of the auxiliary wiring 9 contrary to the outside of the auxiliary wiring, a group of the source signal line 3 in the vicinity of the center portion of the display region 8 is the opposite end does not intersect the respective jacks 5 As described above, the terminal is terminated only by the wiring length L necessary to intersect the group of source signal lines 3 near the left and right ends.

The length of the auxiliary wiring 9 is defined as a circuit length, and the length D or E of the source signal line 3 outside the display area 8 is defined as an external extension. Since the auxiliary wiring is provided in this manner, each group of source signal lines has an intersection with a specific auxiliary wiring.

The number of a group of source signal lines such that the end opposite to the terminal 5 is perpendicular to or not to the auxiliary wiring 9 depends on the number of the auxiliary wirings 9 formed outside the display area 8. (In FIG. 1, the display area 8 is divided into right and left, and each is two.) If a large number of auxiliary wirings 9 can be formed in parallel, the number of groups can be increased and the number of source signal lines in one group can be reduced, so that the parasitic capacitance of the auxiliary wirings can be reduced.

In the case of the SVGA class, for example, it is sufficient that auxiliary wirings are provided separately to the left and right of the display area 8 and five auxiliary wirings 9 are formed. In this case, the number of source signal lines 3 in one group is 240.
The outermost auxiliary wiring 9 is used for repairing the source signal line 3 at the center of the display area. In this case, the number of intersections 6 is reduced to 1440 (240 in the conventional example).
0). Even if an intersection with the gate signal line 2 is added, the time constant can be reduced to 2/3 of the conventional example. With this configuration, a disconnection portion 10 was actually formed in the central source signal line 3, and the source signal line 3 having the disconnection portion 10 was repaired and driven.

Needless to say, the continuity of the intersection 6 and the driving quality of the panel were inspected by an inspection apparatus before mounting the driver IC board and the control circuit board.

In this configuration, the number of auxiliary wirings 9 assigned to a group of source signal lines is substantially one, and the number of source signal lines 3 that can be disconnected and repaired is also limited to one per group. . Therefore, although the possibility is low, if two disconnections occur per group as shown in FIG. 3, the panel is repaired in the above-described configuration in which one auxiliary wiring 9 is provided per group of the source signal lines 3. Impossible. In order to solve this problem, it is sufficient to simply increase the number of auxiliary wirings 9 allocated to the group of source signal lines 3 (for example, to double the number). FIG. 3 shows a second embodiment according to the present invention.
This will be described with reference to FIG. FIG. 3 is a plan view showing another embodiment of the liquid crystal display embodying the present invention. In FIGS. 3 and 4, reference numerals 1 to 9 indicate the same parts as those in FIGS. 1 and 2. Reference numerals 3a and 3b indicate source signal lines, and reference numerals 10a and 10b
Indicates a disconnection defect, reference numeral 11 indicates a metal pattern film,
Reference numerals 12a and 12b indicate intersections.

However, on an actual panel, there is a limit to the space that can be provided. Therefore, as shown in FIG. 3, a configuration is conceivable in which the metal pattern film 11 is disposed across two parallel auxiliary wirings 9 via an insulating film so as to be orthogonal to each other. Here, if the metal pattern film 11 is formed on the same layer as the source signal line 3 with the same material, for example, the insulating film between the metal pattern film 11 and the auxiliary wiring 9 can also serve as the second insulating film 7b. The present configuration can be realized without requiring a new process as compared with the configuration of FIG.

FIG. 4 is a partially enlarged explanatory view of FIG. According to the embodiment, even when two disconnections indicated by the disconnection portions 10a and 10b occur in the source signal lines 3a and 3b near both sides of the display area 8, the laser irradiation can be performed.
At the intersections 12a and 12b indicated by black circles, the metal pattern film 11 and the auxiliary wiring 9 are electrically connected, and the auxiliary wiring 9 is cut at an appropriate location (for example, at 13) by laser irradiation. Signals are transmitted to the source signal lines 3a and 3b as indicated by arrows in FIG.

As shown in FIG. 4, if two source signal lines 3a and 3b near both sides of the display area 8 are repaired, it is impossible to repair the central part of the display area 8; As a result, a further improvement in yield can be expected overall.

As the above-mentioned insulating film 7, for example, silicon nitride (Si ₃ N ₄ ) which is a material of a general insulating film is used. For example, it may be formed of silicon oxide (SiO ₂ ). When formed of silicon oxide, the relative dielectric constant of silicon nitride, which is a material of a general insulating film, is about 7, while the relative dielectric constant of silicon oxide is about 4,
The parasitic capacitance at the intersection 6 can be reduced. When the insulating film 7 is formed of tantalum oxide (Ta ₂ O ₅ ), its relative dielectric constant is about 20 which is much larger than that of silicon nitride. There is no loss of characteristics. Therefore, since the thickness of the insulating film at the intersection 6 can be increased, the occurrence of an interlayer short-circuit defect due to foreign matter or the like at the intersection 6 can be suppressed.

The above-described forming step corresponds to forming the first insulating film 7a and the second insulating film 7b in the same step in the forming step of the insulating film 7. However, the first insulating film 7a and the second insulating film The film 7b may be formed separately in different steps. In this case, the second insulating film 7b may be made of silicon nitride which is a material of a general insulating film, but may be made of silicon oxide which is another different material. Parasitic capacitance can be reduced.

[0034]

According to the liquid crystal display device of the present invention, the number of intersections between the auxiliary signal lines and the source signal lines can be reduced.
An increase in parasitic capacitance can be suppressed. Therefore,
Display failure due to signal delay does not occur. As a result, it is possible to confirm the repair of the disconnection before mounting the driver IC board and the control circuit board, so that a low-cost and high-yield liquid crystal display device can be realized.

[Brief description of the drawings]

FIG. 1 is a plan view of a liquid crystal display according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a point P and a peripheral portion thereof in a cross section taken along line AA of FIG. 1;

FIG. 3 is a plan view of a liquid crystal display according to another embodiment of the present invention.

FIG. 4 is a diagram illustrating a method for repairing a disconnection of a liquid crystal display device according to another embodiment of the present invention.

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

FIG. 6 is a sectional view showing a point Q and a peripheral portion thereof in a section taken along line BB of FIG. 5;

FIG. 7 is a plan view of another conventional liquid crystal display device for solving the problem of the conventional liquid crystal display device shown in FIG.

8 is an explanatory diagram of a method for repairing a disconnection of another conventional liquid crystal display device shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transparent insulating substrate 2 Gate signal line 3 Source signal line 4 Thin film transistor 5 Terminal 9 Auxiliary wiring

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-203986 (JP, A) JP-A-1-142714 (JP, A) JP-A-6-186591 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) G02F 1/1345 G02F 1/1343

Claims (10)

(57) [Claims] 1. A method according to claim 1, wherein the transparent insulating substrate is arranged in parallel and at equal intervals.
A plurality of gate signal lines set, and perpendicular to the gate signal line, and, in parallel and a plurality of source signal lines arranged at regular intervals, at each intersection of the source signal line and the gate signal line The thin film transistors provided respectively cover one end of each of the gate signal lines and the terminal provided at one end of each of the source signal lines, and cover the gate signal lines and the peripheral portions of the terminals. A liquid crystal display device comprising: an insulating film formed on a substrate; and a plurality of auxiliary wirings disposed so as to circumscribe a peripheral portion of a display region in which the thin film transistor is disposed, wherein the plurality of source signal lines are provided. Are divided into a plurality of groups adjacent to each other, and the opposite end of the source wiring group near the left and right ends of the display area does not intersect with the auxiliary wiring on the outside. The near-terminal side end of the nearby source line group intersects with the outside auxiliary line, and the inside auxiliary line does not intersect with the opposite terminal side end of the source line group near the center of the display area, The outer length of the source signal line outside the display area is determined and the circumference of the auxiliary wiring is determined so as to intersect with the opposite end of the source wiring group near the left and right ends of the display area, Accordingly, a source signal line and an auxiliary wiring are formed, so that a liquid crystal display device is provided. 2. The liquid crystal display device according to claim 1, wherein said insulating film is made of any one of Si ₃ N ₄ , SiO ₂ , and Ta ₂ O ₅ . 3. A plurality of gate signal lines arranged on the transparent insulating substrate in parallel and at equal intervals, and a plurality of source signals orthogonal to the gate signal lines and arranged in parallel and at equal intervals. Line, a thin film transistor provided at each intersection of the gate signal line and the source signal line, and a thin film transistor provided at one end of each of the gate signal lines and one end of each of the source signal lines. And a first insulating film formed so as to cover the gate signal line, a second insulating film formed so as to cover a peripheral portion of the terminal, and a display region in which the thin film transistor is provided. A liquid crystal display device comprising a plurality of auxiliary wirings arranged so as to go around a peripheral portion, wherein the plurality of source signal lines are divided into a plurality of groups adjacent to each other, and left and right ends of a display area. The non-terminal side end of the nearby source line group does not intersect with the outside auxiliary line, and the non-terminal side end of the source line group near the center of the display area intersects with the outside auxiliary line, The inner auxiliary wiring does not intersect with the non-terminal end of the source wiring group near the center of the display area, but intersects with the non-terminal end of the source wiring group near the left and right ends of the display area. A liquid crystal display device characterized in that the external extension of the source signal line outside the display area is determined and the length of the circumference of the auxiliary wiring is determined, whereby the source signal line and the auxiliary wiring are formed. 4. The method according to claim 1, wherein the second insulating film is made of Si ₃ N ₄ and SiO 2.
4. The liquid crystal display device according to claim 3, wherein the liquid crystal display device comprises one of the following _two items. 5. Arrangement on a transparent insulating substrate in parallel and at equal intervals.
A plurality of gate signal lines set, and perpendicular to the gate signal line, and, in parallel and a plurality of source signal lines arranged at regular intervals, at each intersection of the source signal line and the gate signal line The thin film transistors provided respectively cover one end of each of the gate signal lines and the terminal provided at one end of each of the source signal lines, and cover the gate signal lines and the peripheral portions of the terminals. A liquid crystal display device comprising: an insulating film formed on a substrate; and a plurality of auxiliary wirings disposed so as to circumscribe a peripheral portion of a display region in which the thin film transistor is disposed, wherein the plurality of source signal lines are provided. Are divided into a plurality of groups adjacent to each other, and each of the groups is displayed such that source signal lines belonging to the groups may have intersections with specific auxiliary wirings and the insulating film via the insulating film. The external extension of the source signal line outside the region is determined, and the circumference of the auxiliary wiring is determined, whereby the source signal line and the auxiliary wiring are formed. A liquid crystal display device which is formed via the insulating film so as to extend over the auxiliary wiring so as to be orthogonal to the auxiliary wiring and to position the metal pattern film on a boundary line of each group. 6. The liquid crystal display device according to claim ₅ , wherein said insulating film is made of any one of Si ₃ N ₄ , SiO ₂ and Ta ₂ O ₅ . 7. Arrangement on a transparent insulating substrate in parallel and at equal intervals.
A plurality of gate signal lines set, and perpendicular to the gate signal line, and, in parallel and a plurality of source signal lines arranged at regular intervals, at each intersection of the source signal line and the gate signal line The thin film transistors provided respectively cover one end of each of the gate signal lines and the terminal provided at one end of each of the source signal lines, and cover the gate signal lines and the peripheral portions of the terminals. A liquid crystal display device comprising: an insulating film formed on a substrate; and a plurality of auxiliary wirings disposed so as to circumscribe a peripheral portion of a display region in which the thin film transistor is disposed, wherein the plurality of source signal lines are provided. Are divided into a plurality of groups adjacent to each other, and for each of the groups, a source signal line belonging to the group may have an intersection with a specific auxiliary wiring via the second insulating film. The external extension of the source signal line outside the display area is determined and the circumference of the auxiliary wiring is determined, whereby the source signal line and the auxiliary wiring are formed, and the metal pattern film is formed. A liquid crystal display device which is formed via the insulating film so as to extend over the auxiliary wiring so as to be orthogonal to the plurality of auxiliary wirings and to position the metal pattern film on a boundary line of each group. . 8. The method according to claim 1, wherein the second insulating film is made of Si ₃ N ₄ and Si
The liquid crystal display device according to claim 7 consisting of any one of O _2. 9. Arranged in parallel and at equal intervals on a transparent insulating substrate.
A plurality of gate signal lines set, and perpendicular to the gate signal line, and, in parallel and a plurality of source signal lines arranged at regular intervals, at each intersection of the source signal line and the gate signal line The thin film transistors provided respectively cover one end of each of the gate signal lines and the terminal provided at one end of each of the source signal lines, and cover the gate signal lines and the peripheral portions of the terminals. A liquid crystal display device comprising: an insulating film formed on a substrate; and a plurality of auxiliary wirings disposed so as to circumscribe a peripheral portion of a display region in which the thin film transistor is disposed, wherein the plurality of source signal lines are provided. Are divided into a plurality of groups adjacent to each other, and in the source wiring group, those whose end on the opposite terminal side intersects with the outer auxiliary wiring only intersect with the outer auxiliary wiring. In the source wiring group,
The external extension of the source signal line outside the display area is determined and the peripheral wiring of the auxiliary wiring is determined so that the one whose end opposite to the terminal intersects the internal auxiliary wiring intersects only the internal auxiliary wiring. A liquid crystal display device, wherein a length is determined, thereby forming a source signal line and an auxiliary wiring. 10. A plurality of gate signal lines disposed on a transparent insulating substrate in parallel and at equal intervals, and a plurality of source signals orthogonal to the gate signal lines and disposed in parallel and at equal intervals. Line, a thin film transistor provided at each intersection of the gate signal line and the source signal line, and a thin film transistor provided at one end of each of the gate signal lines and one end of each of the source signal lines. And a first insulating film formed so as to cover the gate signal line, a second insulating film formed so as to cover a peripheral portion of the terminal, and a display region in which the thin film transistor is provided. A liquid crystal display device comprising a plurality of auxiliary wirings arranged so as to go around a peripheral portion, wherein the plurality of source signal lines are divided into a plurality of groups adjacent to each other, and the source wiring group Among them, those whose counter-terminal end intersects the outside of the auxiliary wiring intersects with only the outside of the auxiliary wiring of the source line group,
The external extension of the source signal line outside the display area is determined and the peripheral wiring of the auxiliary wiring is determined so that the one whose end opposite to the terminal intersects the internal auxiliary wiring intersects only the internal auxiliary wiring. A liquid crystal display device, wherein a length is determined, thereby forming a source signal line and an auxiliary wiring.