JP3096009B2 - LCD panel - 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 panel.

[0002]

2. Description of the Related Art As shown in FIG. 14, a liquid crystal display panel is soft and has a sheet resistance of about 0.2 .OMEGA ./. Quadrature. Al or Al, which is about 3% of Ta (tantalum) or Ti (titanium). Containing high melting point metal such as
It is composed of a plurality of scanning signal lines 3 and a plurality of video signal lines 2 formed of a system alloy, and a pixel electrode 6 formed of a transparent conductive film (ITO) at a position where the lines intersect. A TFT is provided in each liquid crystal cell of the pixel electrode 6.
An image is displayed by controlling the voltage applied by the transistor. In the manufacturing process of such a liquid crystal display panel, defects occur due to various causes such as abnormal patterning due to dust and destruction of the element due to static electricity or the like. Therefore, the inspection probe electrodes are brought into contact with all the electrodes mounted on the liquid crystal driving LSI. In addition, inspection is performed a plurality of times in the manufacturing process, and manufacturing is performed.

However, in recent years, high definition has been promoted to improve display quality, and the number of pixels tends to increase. Therefore, the distance between the mounting electrodes of the LSI for driving the liquid crystal becomes narrower, the contact distance between the probe electrodes for inspection for performing the inspection plural times in the above-mentioned manufacturing process becomes narrower, and one of the video signal wiring and the scanning signal wiring becomes smaller. Contacting a single probe electrode
The manufacturing cost is very expensive, the manufacturing period is long, and the stability of the contact of the probe electrode and the maintenance of the probe electrode are very difficult. In particular, a liquid crystal display panel using a chip-on-glass method in which an LSI driver for driving a liquid crystal is directly mounted on a glass substrate 7 cannot directly contact an electrode pad. Therefore, it is desired that the development cost of a probe or the like be reduced, the development period be shortened, and a simple signal and a simple probe be used for inspection.

Therefore, as a simple inspection method, as shown in FIG. 14, an inspection electrode terminal 9 is connected to a common bus line 1 connected to at least one of a plurality of video signal lines 2 and a plurality of scanning signal lines 3 of a liquid crystal display panel. An inspection probe is set up at the terminal 9 and an inspection signal 13 is supplied to inspect the liquid crystal display panel to judge pass / fail. Thereafter, a portion 11 in which at least one of the video signal wiring 2 and the scanning signal wiring 3 connected to the common bus wiring 1 provided outside the liquid crystal screen 8 is cut by laser light as shown in FIG. 15 is cut. Thus, the final form of the liquid crystal display panel is obtained. FIG. 15 is an enlarged view of a portion cut by laser light, and a step of cutting by laser light will be described. When cutting with a laser beam, the line pattern from the side of the first line pattern of the repetitive line pattern to the end line pattern is continuously cut all at once.

Until now, the line pattern 10 has been made of Al which is a low resistance metal or Ta (tantalum), T
It was formed of a material containing a high melting point metal such as i (titanium). When the line pattern 10 is cut with a laser beam, the Al scatters and short-circuits adjacently. Al is very susceptible to corrosion, so corrosion occurs from the end face cut with the laser beam, and electrostatic breakdown due to low resistance. Problems occurred, and the address of the line defect could not be found. Therefore, recently, the line pattern 10 has a higher hardness than Al and is formed of a high-resistance transparent conductive film (ITO) or the like forming a pixel electrode. The step of cutting the line pattern 10 with a laser beam as shown in FIGS. 14 and 15 is the last step, and is a particularly important part to be performed after the image display inspection is performed. Here, it is indispensable to prevent the occurrence of defective panels in order to reduce loss costs and improve productivity. 4 is a gate mounting electrode and 5 is a source mounting electrode.

[0006]

However, the line pattern 10 having a sheet resistance of 10 Ω / □ or more is almost transparent, transmits laser light, is not absorbed, and can be evaporated without generating heat energy. There is no uncut part. For this reason, laser cutting may have to be performed again, leading to a decrease in productivity. Also, if the resistance of the line pattern 10 is low, the address of the line defect cannot be found as described above,
Insulation breakdown occurs due to an externally generated surge voltage.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned conventional problems, and to provide a liquid crystal display panel in which a decrease in productivity due to a cutting defect or adjacent defect when cutting with a laser beam is minimized. It is.

[0008]

According to a first aspect of the present invention, there is provided a liquid crystal display panel, wherein at least one of a plurality of video signal wirings and a plurality of scanning signal wirings and a common bus wiring provided outside the liquid crystal screen are provided outside the screen. A liquid crystal display panel in which signal lines can be inspected by connecting with the provided line pattern and the line pattern is cut by laser light after the inspection, wherein the line pattern has a shape having a bent portion.

[0009] According to the above configuration, after the inspection, the laser beam is cut using the bent portion of the line pattern.
At this time, since the laser beam is absorbed by the bent portion and the line pattern is evaporated by the absorbed heat energy, it is possible to prevent a breakage when cutting with the laser beam. in this way,
Laser beam breakage can be suppressed, leading to an improvement in productivity. In addition, by having a bent portion, the resistance increases,
In the image inspection process, the location of the line defect can be easily found, and the high resistance leads to prevention of dielectric breakdown.

According to a second aspect of the present invention, in the liquid crystal display panel according to the first aspect, the bent portion is bent in a U-shape, and the opposing sides thereof are arranged in parallel to the direction of travel of the laser beam. As described above, since the opposite sides of the U-shaped bent portion are arranged in parallel with the traveling direction of the laser light, the irradiation time of the laser light can be secured at the opposite sides, and the absorption efficiency of the laser light is improved.

According to a third aspect of the present invention, in the liquid crystal display panel according to the first aspect, the bent portion is bent in a U-shape, and the opposite side thereof is disposed so as to intersect the path of the laser beam. As described above, since the opposite sides of the U-shaped bent portion are arranged so as to intersect with the path of the laser beam, not only cutting using the bent portion, but also a plurality of What is necessary is just to cut | disconnect one of the opposing sides arrange | positioned by a laser beam.

According to a fourth aspect of the present invention, at least one of the plurality of video signal lines and the plurality of scanning signal lines is connected to a common bus line provided outside the liquid crystal screen by a line pattern provided outside the screen. A liquid crystal display panel in which a line pattern is cut by a laser beam after the inspection, wherein an opaque or translucent unconnected pattern is arranged near the line pattern.

According to the above arrangement, the opaque or translucent unconnected pattern is cut by the laser beam after the inspection, so that the line pattern is cut by the cut heat energy. In this case, when an opaque or translucent pattern is cut with a laser beam, the laser beam absorption efficiency in the line pattern increases due to the cut edge, rough surface condition due to the cut, cut scattered objects, etc. Line patterns can be reliably cut. Also in this configuration, breakage by laser light can be prevented, leading to an improvement in productivity.

According to a fifth aspect of the present invention, at least one of the plurality of video signal wirings and the plurality of scanning signal wirings is connected to a common bus wiring provided outside the liquid crystal screen by a line pattern provided outside the screen. A liquid crystal display panel in which a line pattern is cut by a laser beam after the test, and a concave structure pattern is formed in an insulating film layer deposited near the line pattern. Features. According to the above configuration, after the inspection, the absorption efficiency of the laser beam is further increased at the step portion of the concave structure pattern which can be formed larger than the step portion of the line pattern having the bent portion according to claim 1, and the transparent line pattern can be reliably formed. Can be cut into Further, according to the above configuration, the material sublimated at the time of cutting is easily concentrated in the concave portion, and adjacent short-circuit can be prevented.

A liquid crystal display panel according to a sixth aspect of the present invention is the liquid crystal display panel according to the fourth or fifth aspect, wherein the opaque or translucent pattern or the concave structure pattern overlaps the line pattern. By thus overlapping the opaque or translucent pattern or the concave structure pattern with the line pattern, a rough surface state or a larger step portion is provided, and the laser beam absorption efficiency at the step portion increases.

According to a seventh aspect of the present invention, in the liquid crystal display panel according to the first, second, third, fourth or fifth aspect, the line pattern is a transparent conductive film (ITO). As described above, since the line pattern is a transparent conductive film, the use of the transparent conductive film forming the pixel electrode leads to simplification of the process. The liquid crystal display panel according to claim 8 is a liquid crystal display panel.
In 3, 4, 5, 6, or 7, the liquid crystal display panel is manufactured by a chip-on-glass method (COG). As described above, when the liquid crystal display panel is manufactured by the chip-on-glass method in which the liquid crystal driving LSI driver IC is directly mounted on the glass substrate, the mounting interval of the liquid crystal driving LSI is further reduced, and the direct IC mounting is performed. Therefore, the probe shape becomes complicated, and the mounting portion is damaged, so that the needle of the inspection probe cannot be directly placed. Therefore, it is necessary to adopt a configuration in which connection is made by a line pattern as described above. In such a case, the present invention is effective, and the above-described effects can be obtained.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A liquid crystal display panel according to a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is an enlarged view of a portion of the liquid crystal display panel according to the first embodiment of the present invention, which is cut by a laser beam. The same components as those of the liquid crystal display panel shown in FIGS. did.

This liquid crystal display panel is shown in FIGS.
Similarly to the liquid crystal display panel shown in FIG. 5, at least one of the plurality of video signal wirings 2 and the plurality of scanning signal wirings 3 and the common bus wiring 1 provided outside the liquid crystal screen 8 are provided outside the screen 8. They are connected by a line pattern. The line pattern 14a has a U-shaped bent portion 20 as shown in FIG. Here line pattern 1
Explaining the portion 4a and the portion 11 cut by the laser beam, the line pattern 14a connected to the common bus wiring 1 by the connection portion 12 has a sheet resistance of 10Ω / □ or more and is bent in a U-shape in the same configuration line. Bending part 2
The shape is such that 0 alternates with each other. The line pattern 14a is configured such that the opposing sides 20a of the U-shaped bent portion 20 are arranged along the path of the laser beam in FIG.

The common bus wiring connected to at least one of the plurality of video signal wirings 2 and the plurality of scanning signal wirings 3 of the liquid crystal display panel as shown in FIG. 14 by the line pattern 14a configured as described above. 1, an inspection electrode terminal 9 is formed, an inspection probe is set up on this terminal 9 and an inspection signal 13 is supplied to inspect the liquid crystal display panel, and then the video signal wiring 2 connected to the common bus wiring 1 is formed. The final form of the liquid crystal display panel is obtained by cutting the portion 11 where at least one of the scanning signal wiring 3 and the scanning signal wiring 3 is cut by a laser beam. At this time, the line pattern 14a is set to 5
Line pattern 1 with a laser beam width of 0 to 100 μm
4a is continuously cut from the extreme end to the opposite end.
Next, the part 200 to 300 μm away is continuously cut from that place to the first place. If you cut twice in this way, even if there are parts that cannot be cut in the first time,
Can be cut a second time.

The laser beam for cutting the line pattern 14a uses a YAG laser and has a starting wavelength of 1.06 μm.
m is infrared light. The material forming the line pattern 14a and having a sheet resistance of 10 Ω / □ or more is almost transparent, almost transmits infrared and visible laser light, and does not absorb laser light, so that it is difficult to cut. However, when the bent portion 20 is formed, the laser beam is absorbed at the bent portion, and the laser beam is evaporated by the absorbed heat energy, so that the laser beam can be surely cut, so that the cutout can be prevented.

According to this embodiment, the line pattern 14a cut by the laser beam has a shape having the bent portion 20, so that the laser beam is absorbed by the bent portion 20 and the line pattern 14a is melted by the absorbed heat energy. Can be cut securely. Further, since the opposite side 20a of the U-shaped bent portion 20 is arranged in parallel with the traveling direction of the laser light, the irradiation time of the laser light can be secured at the opposite side 20a, and the absorption efficiency of the laser light is improved. . Therefore, it is possible to prevent breakage when cutting with laser light, leading to an improvement in productivity. In addition, the presence of the bent portion 20 increases the resistance, so that the location of a line defect can be easily found in the image inspection process, and the high resistance leads to prevention of dielectric breakdown due to an external surge voltage.

If a transparent conductive film forming the pixel electrode 6 is used as the line pattern 14a, the process can be simplified. The liquid crystal display panel is a liquid crystal driving L
If the SI driver IC is manufactured by the chip-on-glass method (COG) in which the IC is directly mounted on the glass substrate 7, the mounting interval of the LSI for driving the liquid crystal becomes even narrower, and the probe shape becomes complicated because the IC is directly mounted. Further, since the mounting portion is damaged, the needle of the inspection probe cannot be directly placed, and the connection must be made by the line pattern as described above. In such a case, the present invention is effective, and the above-described effects can be obtained.

FIG. 2 is an enlarged view of a portion of the liquid crystal display panel according to the second embodiment, which is cut by laser light. In this case, the opposite side 22a of the U-shaped bent portion 22 is formed so that the line pattern 14b intersects the path of the laser light in FIG.
Are arranged and configured. At this time, not only the cut using the bent portion, but also one of the plurality of opposed sides 22a arranged according to the number of the bent portions 22 may be cut by the laser beam. Other configuration effects are the same as those of the first embodiment.

FIG. 3 shows a liquid crystal display panel according to a third embodiment.
It will be described based on. FIG. 3 is an enlarged view of the portion 11 cut by the laser beam in FIG. The line pattern 10 of this liquid crystal display panel is similar to that of FIG.
An opaque or translucent unconnected pattern 15 is arranged near the line pattern 10. In this case, the line pattern 10 connected to the common bus wiring 1 by the connection unit 12
An opaque or translucent pattern 15 is provided between them.

The opaque or translucent pattern 15 absorbs a laser beam when the line pattern 10 is cut, evaporates the opaque or translucent pattern 15 with the absorbed heat energy, and cuts the cut edge. As a result, the absorption efficiency of the laser light in the line pattern 10 increases due to the rough surface state, cut scattered objects, etc.
The transparent line pattern 10 can also be reliably cut.

The opaque or translucent pattern 15
If a semiconductor pattern constituting a liquid crystal display panel is used as the translucent pattern among them, it can be easily formed in a process. Also, if a source / drain material and a gate material constituting the liquid crystal display panel are used as the opaque pattern, it can be easily formed in the process also in this case. Other configurations are the same as those of the first embodiment.

According to this embodiment, since the opaque or translucent pattern 15 is disposed near the line pattern 10 cut by the laser light, the opaque or translucent pattern 15 absorbs the laser light, The pattern 15 is evaporated by the absorbed heat energy, and the cut edge, the roughened surface state due to the cut, the cut scattering material, etc., increase the laser beam absorption efficiency of the line pattern 10, resulting in a transparent line pattern. 10 can also be reliably cut. Also in this configuration, breakage by laser light can be prevented, leading to an improvement in productivity.

FIG. 4 shows a liquid crystal display panel according to a fourth embodiment.
Explanation will be made based on FIG. FIG. 5 is aa 'of FIG.
It is sectional drawing of the part cut | disconnected by the laser beam cut | disconnected by the line. In the manufacturing process of the liquid crystal display panel, a line pattern 10 is formed on a transparent glass substrate 7 as shown in FIG. Next, an insulating film layer 17 is formed. The insulating film layer 17 includes an insulating film layer deposited on a transparent electrode for driving liquid crystal and an insulating film layer deposited on a gate electrode. On the other hand, a contact hole must be opened in the insulating film layer deposited on the transparent electrode to expose a part of the transparent electrode. Then, the source and drain materials and the transparent electrode are formed so as to be connected through the contact holes. The insulating film layer 1 is formed on or near the line pattern 10 by the above manufacturing process.
7 will be deposited. Therefore, a contact hole is also formed in the vicinity of the line pattern 10 in the above-described contact hole processing step so that the concave structure pattern 16 is formed.

The step 23a of the concave structure pattern 16 forms a step about several times larger than the step of the opaque or translucent pattern. The stepped portion 23a further increases the absorption efficiency of the laser light, so that the line pattern 10 can be cut more reliably. Other configurations are first
This is the same as the embodiment. According to this embodiment,
Since the concave structure pattern 16 is arranged in the vicinity of the line pattern 10 to be cut by the laser beam, the larger step portion 23 is formed.
a is formed, and the laser beam absorption efficiency is further increased at the step portion 23a, so that the line pattern 10 can be cut more reliably. In addition, scattered objects of the line pattern 10 fall into the concave portions of the concave structure pattern 16, which leads to prevention of laser cutting failure and the like. Also in this configuration, breakage by laser light can be prevented, leading to an improvement in productivity.

FIG. 6 is an enlarged view of a portion cut by a laser beam showing the liquid crystal display panel of the fifth embodiment. As the frame of the liquid crystal panel becomes narrower, it may not be possible to arrange line patterns at equal pitches. At this time, the line pattern 10 may be divided into several blocks. Also,
By forming the blocks, marks and study pads can be arranged in empty spaces. In this case, since it is difficult to arrange the opaque or translucent pattern 15 or the concave structure pattern 16 between the line patterns 10, some opaque or translucent patterns 1
5 or concave structure pattern 16 is arranged. In this case, the same effect as in the third or fourth embodiment can be obtained.

FIG. 7 is an enlarged view of a portion cut by a laser beam, showing a liquid crystal display panel according to a sixth embodiment. This liquid crystal display panel has a configuration obtained by combining the third or fourth embodiment and the fifth embodiment, and is a horizontal block in which opaque or translucent patterns 15 or concave structure patterns 16 are repeatedly formed into one block in which line patterns are arranged. And line pattern 10
It is located between them. In this case, the number of opaque or translucent patterns 15 or concave structure patterns 16 increases, so that the laser beam absorption efficiency in the line pattern 10 increases, and cutting can be performed more reliably.

FIG. 8 is an enlarged view of a portion cut by laser light showing the liquid crystal display panel of the seventh embodiment. This liquid crystal display panel has a configuration in which the first and third or fourth embodiments are combined, and an opaque or translucent pattern 15 or a concave structure pattern 16 is arranged between line patterns 14 a having a bent portion 20. ing. In this case, the bent portion 2
The opposing side 20a and the opaque or translucent pattern 15 or the concave structure pattern 16 further increase the absorption efficiency, so that the line pattern 14a can be cut more reliably.

FIG. 9 is an enlarged view of a portion cut by a laser beam showing the liquid crystal display panel of the eighth embodiment. This liquid crystal display panel has a configuration obtained by combining the first and fifth embodiments, and has a block-shaped laterally opaque or translucent pattern 15 or a concave structure pattern 16 in which a line pattern 14a having a bent portion 20 is arranged. Is provided. In this case, the same effect as in the sixth embodiment can be obtained.

FIG. 10 is an enlarged view of a portion of the liquid crystal display panel according to the ninth embodiment cut by a laser beam. This liquid crystal display panel has a configuration in which the seventh and eighth embodiments are combined, and an opaque or translucent pattern 15 or a concave structure pattern is formed between the blocked horizontal line patterns 14a of the line patterns 14a having the bent portions 20. 16 are arranged. In this case, the line pattern 14a can be cut more effectively.

FIG. 11 is an enlarged view of a portion cut by a laser beam showing the liquid crystal display panel of the tenth embodiment.
FIG. 12 is a cross-sectional view when the line pattern 10 cut along the line bb 'in FIG. 11 and the opaque or translucent pattern 15 overlap. FIG. 13 is a line pattern 10 cut along the line bb' in FIG. FIG. 5 is a cross-sectional view when the and the concave structure pattern 16 overlap. 11, the line pattern 10 and the opaque or translucent pattern 15 or the concave structure pattern 16
Are arranged so as to cover the line pattern 10 at the portion to be cut by the laser beam so that the lines overlap. In this case, since the pattern 15 or 16 is disposed on the line pattern 10 to be cut, the surface state becomes rough or a large step is formed, so that the laser beam absorption efficiency in the line pattern 10 increases and the line pattern 10 increases. Can be cut into

That is, as shown in FIG. 12, a line pattern 10 is formed on a glass substrate 7 and an insulating film layer 17 composed of an insulating film deposited on a transparent electrode and an insulating film deposited on a gate electrode is formed on the glass substrate 7. An opaque or translucent pattern 15 is formed so as to overlap the line pattern 10. In this case, a large step portion 23b is formed, and the absorption efficiency of laser light increases. Further, as shown in FIG. 13, a line pattern 10 is formed on a glass substrate 7 and a line pattern 1 is formed.
The concave structure pattern 16 is formed so as to overlap with zero. The step portion 23c of the concave structure pattern 16 is formed by the same forming method as in the fourth embodiment. In this case, the rough surface state and the large step 23c are formed on the line pattern 10, and the heat energy absorbed by the laser beam can be transmitted without loss, and the line pattern 10 can be cut more reliably. can do.

In the third, fourth, fifth, sixth, seventh, eighth and ninth embodiments, the line pattern 1
The opaque or translucent pattern 15 or the concave structure pattern 16 according to the tenth embodiment may be arranged so as to overlap the zeros and the line pattern 14a, and the arrangement location may partially overlap the line patterns 10 and 14a. It may be arranged.

In the seventh, eighth, and ninth embodiments, the line pattern 14b of the second embodiment may be provided in place of the line pattern 14a of the first embodiment, or may be bent. The portion may have another shape such as a hook shape other than the U-shape. In addition, the cutting was performed twice when cutting with the laser light. However, with the above configuration, the cutting with the laser light may be performed once.

[0039]

According to the liquid crystal display panel of the first aspect of the present invention, the line pattern cut by the laser beam has a line pattern shape having a bent portion, so that the laser beam is absorbed and absorbed at the bent portion. The line pattern can be melted by the heat energy and cut reliably. Therefore, it is possible to prevent breakage when cutting with laser light, which has the effect of improving productivity. In addition, the formation of the bent portion increases the resistance, so that the location of a line defect can be easily found in the image inspection process, and the high resistance leads to prevention of dielectric breakdown due to an external surge voltage.

In the second aspect, the opposite sides of the U-shaped bent portion are arranged in parallel to the traveling direction of the laser beam.
The irradiation time of the laser light can be secured on the opposite side, and the absorption efficiency of the laser light is improved. According to the third aspect, since the opposite sides of the U-shaped bent portion are arranged so as to intersect the path of the laser beam, not only cutting using the bent portion, but also according to the number of bent portions. One of the plurality of opposed sides may be cut by the laser beam.

According to the liquid crystal display panel of the present invention, since the opaque or translucent pattern is arranged near the line pattern cut by the laser light, the opaque or translucent pattern applies the laser light. Absorbs and evaporates the pattern with the absorbed heat energy, the cut edge, the rough surface state due to the cut, the cut scattering material, etc., increase the laser beam absorption efficiency in the line pattern, The line pattern can also be reliably cut. Also in this configuration, breakage by laser light can be prevented, leading to an improvement in productivity.

According to the liquid crystal display panel of the present invention, since the concave structure pattern is arranged near the line pattern cut by the laser light, a large step is formed by the concave structure pattern, And the transparent line pattern can be surely cut. Further, the transparent line pattern cut by the laser beam is melted and scattered by heat, but is easily concentrated in the concave portion of the concave structure pattern, and the adjacent short circuit can be prevented. Therefore, defects due to laser light can be suppressed, leading to an improvement in productivity.

According to the sixth aspect, a transparent line pattern;
An opaque or translucent line pattern or a concave structure pattern is overlapped, and rough surface conditions and large steps are formed on the transparent line pattern, so that the thermal energy absorbed by the laser beam can be transmitted without loss. It can be reliably dissolved, and in this case also, it can be reliably cut.

According to the seventh aspect, since the line pattern is a transparent conductive film, the use of the transparent conductive film forming the pixel electrode allows easy formation in a process and leads to cost reduction. According to claim 8, the liquid crystal display panel is a liquid crystal driving L.
When manufactured by the chip-on-glass method of mounting the SI driver IC directly on a glass substrate, the LSI for driving a liquid crystal
The mounting interval becomes even narrower, the probe shape becomes complicated because the IC is directly mounted, and the needle of the inspection probe cannot be placed directly because the mounting part is damaged. There must be. In such a case, the present invention is effective, and the above-described effects can be obtained.

[Brief description of the drawings]

FIG. 1 is an enlarged view of a portion of a liquid crystal display panel cut by a laser beam according to a first embodiment of the present invention.

FIG. 2 is an enlarged view of a portion cut by a laser beam of a liquid crystal display panel according to a second embodiment of the present invention.

FIG. 3 is an enlarged view of a portion cut by a laser beam of a liquid crystal display panel according to a third embodiment of the present invention.

FIG. 4 is an enlarged view of a portion cut by a laser beam of a liquid crystal display panel according to a fourth embodiment of the present invention.

FIG. 5 is a sectional view taken along line aa ′ of FIG. 4;

FIG. 6 is an enlarged view of a portion cut by laser light of a liquid crystal display panel according to a fifth embodiment of the present invention.

FIG. 7 is an enlarged view of a portion cut by laser light of a liquid crystal display panel according to a sixth embodiment of the present invention.

FIG. 8 is an enlarged view of a portion cut by laser light of a liquid crystal display panel according to a seventh embodiment of the present invention.

FIG. 9 is an enlarged view of a portion cut by laser light of a liquid crystal display panel according to an eighth embodiment of the present invention.

FIG. 10 is an enlarged view of a portion cut by laser light of a liquid crystal display panel according to a ninth embodiment of the present invention.

FIG. 11 is an enlarged view of a portion cut by laser light of a liquid crystal display panel according to a tenth embodiment of the present invention.

FIG. 12 is a sectional view taken along the line bb 'of FIG.

FIG. 13 is a sectional view taken along the line bb 'of another configuration of FIG.

FIG. 14 is a configuration diagram of a conventional liquid crystal display panel.

FIG. 15 is an enlarged view of a portion of a conventional liquid crystal display panel cut by a laser beam.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Common bus wiring 2 Video signal wiring 3 Scanning signal wiring 4 Gate mounting electrode (gate driver) 5 Source mounting electrode (source driver) 6 Pixel electrode 7 Glass substrate 8 Liquid crystal screen 9 Inspection electrode terminal 10 Line pattern 11 Cutting by laser light Part 12 Connection part 13 Inspection signal 14a, 14b Line pattern 15 Opaque or translucent pattern 16 Concave structure pattern 17 Insulating film layer 20, 22, Bent part 20a, 22a Opposite side 23a, 23b, 23c Step part

──────────────────────────────────────────────────の Continued on the front page (72) Inventor Hideyuki Imura 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Takeshi Nakagawa 1006 Odaka Kadoma Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (56) References JP-A-5-45655 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G02F 1/1343 G02F 1/1345

Claims (8)

(57) [Claims] At least one of a plurality of video signal wirings and a plurality of scanning signal wirings and a common bus wiring provided outside a liquid crystal screen are connected by a line pattern provided outside the screen to inspect the signal wirings. A liquid crystal display panel, wherein the line pattern is cut by a laser beam after inspection, wherein the line pattern has a shape having a bent portion. 2. The liquid crystal display panel according to claim 1, wherein the bent portion is bent in a U-shape, and opposite sides thereof are arranged in parallel to a traveling direction of the laser light. 3. The liquid crystal display panel according to claim 1, wherein the bent portion is bent in a U-shape, and the opposite side thereof is arranged to intersect the path of the laser light. 4. An inspection of the signal wiring by connecting at least one of a plurality of video signal wirings and a plurality of scanning signal wirings to a common bus wiring provided outside the liquid crystal screen by a line pattern provided outside the screen. A liquid crystal display panel in which the line pattern is cut by a laser beam after inspection, wherein an opaque or translucent unconnected pattern is arranged near the line pattern. 5. An inspection of the signal wiring by connecting at least one of a plurality of video signal wirings and a plurality of scanning signal wirings to a common bus wiring provided outside the liquid crystal screen by a line pattern provided outside the screen. A liquid crystal display panel wherein the line pattern is cut by a laser beam after inspection, wherein a concave structure pattern is formed in an insulating film layer deposited near the line pattern. panel. 6. The liquid crystal display panel according to claim 4, wherein the opaque or translucent pattern or the concave structure pattern overlaps the line pattern. 7. A transparent conductive film (ITO) having a line pattern.
The liquid crystal display panel according to claim 1, 2, 3, 4, 5, or 6. 8. A liquid crystal display panel manufactured by a chip-on-glass method (COG).
Or the liquid crystal display panel of 7.