JP3999844B2 - Liquid crystal panel and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connection structure between an input electrode of a driver IC and an FPC electrode of a V-line inversion method (upper and lower data driver) in a COG type liquid crystal display panel.
[0002]
[Prior art]
Of the electric circuits of the liquid crystal display device including the liquid crystal display panel, the signal processing system and the control system are arranged on the printed circuit board, and the driver IC group is mounted on the liquid crystal cell. There is a COG (chip-on-glass) system that is directly attached to the surface. In addition, in the COG mounting method, there is a wiring method in which bus wiring for supplying signals and power to the bare chip is externally provided by FPC.
[0003]
The COG mounting type liquid crystal display device has a large glass plate (first and second large substrates) with electrode exposure, pattern / etching process, color filter attaching, alignment, seal printing process, and liquid crystal injection gap adjusting spacers. Assembling process, swing / break process, liquid crystal display cell created by swing / break process, press-sealing process, polarizing plate attaching process and final inspection process It is manufactured after.
[0004]
In the manufacturing process described above, in an assembled state, the electrode pattern for mounting the driver LSI bare chip is a liquid crystal display panel formed with a frame-shaped adhesive S on an integrated large substrate 32 as shown in FIG. A plurality of portions 7 are formed in a row in the vertical direction and arranged in a plurality of rows in the horizontal direction. And in the liquid crystal display panel part 7 which is an adjacent liquid crystal panel adjacent to the vertical direction, a voltage introduction pattern group which is a first electrode connection part in one liquid crystal display panel part 7-1 which is the first liquid crystal display panel part. 4 and the voltage introduction pattern group 5 which is the second electrode connection portion in the other liquid crystal display panel portion 7-2 which is the second liquid crystal display portion are opposed to each other through the gap 8.
[0005]
As shown in FIG. 5, the voltage introduction pattern group 4 in one electrode includes a first pattern 4A, a second pattern 4B, a third pattern 4C, a fourth pattern 4D, and a fifth pattern 4E from left to right. The first pattern 4A, the third pattern 4C, the fourth pattern 4D, and the fifth pattern 4E have the same width, whereas the second pattern 4B It is wider than the patterns 4A, 4C, 4D, 4E.
[0006]
Further, the voltage introduction pattern group 5 in the other electrode has a pattern arrangement different from that of the voltage introduction pattern group 4 in the one electrode, and is point-symmetric, as shown in FIG. 5A, the second pattern 5B, the third pattern 5C, the fourth pattern 5D, and the fifth pattern 5E. The first pattern 5A, the second pattern 5B, and the fourth pattern 5D While the fifth pattern 5E has the same width, the third pattern 5C is wider than these patterns 5A, 5B, 5D, and 5E.
[0007]
Then, in the swing / break process, the integrated large-sized substrate 32 is laid out by cutting lines U-U 'and Y-Y' as shown in FIG. A plurality of liquid crystal display panels F in which the substrate 2 and the second substrate 3 are integrated are formed.
[0008]
[Problems to be solved by the invention]
However, in the above conventional example, the cutting line U-U 'may be formed at the center of the gap 8 and cut by a scribe break. However, as shown in FIG. 1 and the voltage introduction pattern group 4 in one liquid crystal display panel equivalent portion 7-1 crosses the voltage introduction pattern group 5, as shown in FIG. ) 4B-1 sometimes remained.
[0009]
Further, the FPC 9 is provided with an electrode pattern 10, which is arranged from the right to the left, the first lead pattern 10A, the second lead pattern 10B, the third lead pattern 10C, and the fourth lead pattern. 10D, the fifth lead pattern 10E, and the sixth lead pattern 10F, and the first to sixth lead patterns 10A to 10F all have the same width.
[0010]
Then, an anisotropic conductive film (not shown) is applied to the first to sixth lead patterns 10A to 10F of the FPC 9 and the first to fifth patterns 5A to 5E of the voltage introduction pattern group 5 of the liquid crystal display panel F. 6, when the fourth lead pattern 10D and the fifth lead pattern 10E remain in the voltage introduction pattern group 5, the second voltage introduction of the voltage introduction pattern group 4 as shown in FIG. The fourth lead pattern 10D and the fifth lead pattern 10E are short-circuited via the remaining portion 4B-1 of the second pattern 4B because they are connected to the remaining portion 4B-1 of the pattern 4B. A defective product as a display device appears, and there is a problem that the yield is poor.
[0011]
The present invention has been made paying attention to the above-mentioned problems, and the object is to prevent short-circuiting between patterns when the FPC lead pattern is bonded to the pattern of the voltage introduction pattern group. An object is to provide an electrode connection structure of a liquid crystal display panel that does not reveal defective products and improves the yield.
[0012]
[Means for Solving the Problems]
The present invention provides a liquid crystal panel having a configuration in which liquid crystal is sealed between first and second substrates having electrodes, and the first substrate includes a plurality of electrode terminals for inputting signals to the liquid crystal panel. An electrode terminal group is provided, and the electrode terminal group includes at least two types of electrode terminals, a first electrode terminal having a narrow width and a second electrode terminal having a width wider than the first electrode terminal , An electrode notch portion formed so as to divide the end portion in the width direction is provided at an end portion of the electrode terminal on the first substrate end side.
The second electrode terminal may have a width across two first electrode terminals disposed on the first substrate.
Further, the first and second electrodes have substantially the same width as the first electrode terminal between the end portions of the first and second electrode terminals and the end side of the first substrate adjacent to the end portions. An electrode independent of the terminal may be provided.
In this case, it is preferable that the width of the end portion of the second electrode terminal left adjacent to the electrode notch is substantially the same as the width of the first electrode terminal.
In the present invention, the first large substrate is provided with a first electrode for obtaining a plurality of liquid crystal panels, and the second large substrate is provided with at least a second electrode for obtaining a plurality of liquid crystal panels. The first large substrate and the second large substrate are disposed with a gap so that the electrodes face each other, and a plurality of frame-shaped seals for liquid crystal sealing are disposed in the gap to form an integrated large substrate. In a method of manufacturing a liquid crystal panel obtained by cutting a formed one in a cutting step, a plurality of first electrodes corresponding to adjacent liquid crystal panels on a first large substrate are arranged with electrode ends facing each other. The opposing electrode is composed of at least two kinds of electrodes having a narrow electrode width and a wider electrode width. At the end of the electrode having a wide electrode width, a missing portion of at least one electrode from this end toward the liquid crystal Arranged Is cut in which cutting step and is characterized in that is made between the ends of the adjacent liquid crystal panel electrode facing the electrode having the cut-out portion from the electrode cut-out portion.
[0013]
With such a configuration, when forming a plurality of liquid crystal display panels in which the first substrate and the second substrate are integrated by laying a cutting line on the integrated large substrate and cutting it with a scribe break, the cutting lines are The voltage introduction pattern which is the first electrode connection portion of the liquid crystal display panel corresponding portion which is one liquid crystal display panel portion off the center of the gap between the patterns of the voltage introduction pattern group of the one and other liquid crystal display panel corresponding portions. A part of the voltage introduction pattern group corresponding to one liquid crystal display panel is added to the voltage introduction pattern group corresponding to the second electrode connection portion in the portion corresponding to the liquid crystal display panel which is the other liquid crystal display portion. However, the remaining part is a pattern part and a part of one and the other pattern part, which is a part of the wide pattern. When the FPC lead pattern is bonded to the pattern of the voltage introduction pattern group of the liquid crystal display panel through an anisotropic conductive film, soldering or heat sealing, the FPC lead pattern is Even if the remaining portion is touched, the patterns are not short-circuited. For this reason, a defective product as a liquid crystal display device does not appear and the yield is improved.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view of a liquid crystal display panel to which an FPC for inputting signals and inputting / outputting power using the COG method is connected. FIG. 2 shows a first large substrate with a gap adjusting spacer (not shown). FIG. 3 is a plan view showing a state in which two large glass plates, which are second large substrates, are overlapped to assemble an integrated large substrate, and FIG. 3 shows a second liquid crystal display panel portion corresponding to the other liquid crystal display panel in the integral large substrate. FIG. 4 is an explanatory diagram of a state where the voltage introduction pattern group which is the first electrode connection portion of the portion corresponding to one liquid crystal display panel which is the first liquid crystal display panel unit is matched with the voltage introduction pattern group which is the two electrode connection unit. It is explanatory drawing of the connection state of the voltage introduction pattern group (input electrode of driver IC) and the electrode pattern group of FPC in a display panel.
In the liquid crystal display panel according to the present invention, the same parts and portions as those of the conventional configuration are denoted by the same reference numerals.
[0015]
The liquid crystal display panel F according to the present invention is different from the conventional liquid crystal display panel in the configuration of one and the other voltage introduction pattern groups 4 and 5, and the other configuration is the same as the connection structure of the conventional liquid crystal display panel. Therefore, the description of the same configuration is omitted.
[0016]
That is, the voltage introduction pattern group 4 includes a first pattern 4A, a second pattern 4B, a third pattern 4C, a fourth pattern 4D, and a fourth pattern 4E from left to right as shown in FIG. The first pattern 4A, the third pattern 4C, the fourth pattern 4D, and the fifth pattern 4E have the same width, whereas the second pattern 4B has these patterns. It is wider than 4A, 4C, 4D, 4E. A notch 20 is formed at the center of the edge 4a of the second pattern 4B, and the tip of the second pattern 4B is formed in a bifurcated shape by the notch 20. The other pattern portions 21 and 22 have the same width as the other patterns 4A, 4C, 4D, and 4E.
[0017]
The voltage introduction pattern group 5 includes a first pattern 5A, a second pattern 5B, a third pattern 5C, a fourth pattern 5D, and a fifth pattern 5E from right to left as shown in FIG. Therefore, the first pattern 5A, the second pattern 5B, the fourth pattern 5D, and the fifth pattern 5E have the same width, whereas the third pattern 5C has these patterns 5A. It is wider than 5B, 5D and 5E. A notch 23 is formed at the center of the edge 5a of the third pattern 5C, and the tip of the second pattern 5B is formed in a bifurcated shape by the notch 23. The other pattern portions 24 and 25 have the same width as the other patterns 5A, 5B, 5D, and 5E.
[0018]
In the integrated large-sized substrate 32 formed by overlapping and fixing the first large-sized substrate 30 and the second large-sized substrate 31, the voltage introduction pattern group 4 in one liquid crystal display panel equivalent portion 7-1 and the other liquid crystal The voltage introduction pattern group 5 in the display panel equivalent portion 7-2 faces the gap 8.
[0019]
Then, as described in the conventional example, the integrated large substrate 32 is laid out with the cutting lines U-U 'and Y-Y' and cut by a scribe break, so that the first substrate 2 and the second substrate 3 are integrated. A plurality of the liquid crystal display panels F are formed. The cutting line U-U 'may be formed at the center of the gap 8 and cut by a scribe break. However, as shown in FIG. Is off the center of the gap 8 and crosses the voltage introduction pattern group 4 in one of the liquid crystal display panel equivalent portions 7-1. As shown in FIG. Department remains.
[0020]
In this case, a part of the voltage introduction pattern group 4 remaining in the voltage introduction pattern group 5 includes the first part of the patterns 4A, 4C, and 4D and the first and second pattern parts 21 and 22 that are the front part of the second pattern 4B. Part 21-1, 22-1.
[0021]
Then, the first to sixth lead patterns 10A to 10F of the FPC 9 are bonded to the first to fifth voltage introduction patterns 5A to 5E of the voltage introduction pattern group 5 of the liquid crystal display panel F through an anisotropic conductive film. 4, the first to sixth lead patterns 10A to 10F of the FPC 9 remain in the voltage introduction pattern group 5, and the first to fifth voltage introduction patterns of the voltage introduction pattern group 4 remain. Connected to 4A-4E.
[0022]
In this case, even if the fourth lead pattern 10D of the FPC 9 contacts the pattern unit 25 and the fifth lead pattern 10E of the FPC 9 contacts the fourth voltage introduction pattern 5D, the fourth lead pattern 10D and the fifth lead There is no short circuit with the pattern 10E. For this reason, a defective product as a liquid crystal display device does not appear and the yield is improved.
[0023]
In the above description, the electrode width across the electrode connecting part is between two electrodes and the missing part is one place, but the across electrode width may be between three electrodes and the missing part may be two places, and the across electrode width is n As the (integer), n-1 is very good, and the effect of the present application can be obtained in any case.
[0024]
In the above description, the COG diagram is used to explain, but the present invention is a technique related to the connection between the electrode connection portion of the liquid crystal display panel and the FPC or the substrate, and the substrate to be connected is TAB, TCP, FPC, or other substrate. Even if it uses, this invention is applicable and the effect mentioned below is acquired.
On the other hand, in the electrode connection structure of the liquid crystal display panel according to the present invention, at least a first electrode pattern for obtaining a plurality of single liquid crystal display panels is formed on the first large substrate, and the plurality of second large substrates have a plurality of electrodes. At least a second electrode pattern for obtaining a single liquid crystal display panel is formed, and a first large substrate and a second large substrate are provided with a gap so that the electrodes face each other, and a seal for sealing the liquid crystal And at least a first liquid crystal display panel portion and a second liquid crystal display panel portion constituting a single liquid crystal display panel and forming a single large substrate, and the first liquid crystal display panel portion and the second liquid crystal A display panel unit is formed adjacent to the integrated large-sized substrate, and the first electrode connection unit and the first electrode connection unit are input / output electrode wirings for the first liquid crystal display panel unit. Adjacent to There is a gap between the second electrode connection portions which are input / output wirings of the second liquid crystal display panel portion, and a cutting line for cutting the large integrated substrate into a single liquid crystal panel is an abbreviation of the gap. It is an electrode connection structure of a multi-piece liquid crystal panel that is set at the center and cuts the integrated large substrate into a single liquid crystal display panel, and at least one kind of the first electrode connection part or the second electrode connection part is provided. And the adjacent second electrode connection part or the first electrode connection part has at least one electrode pattern width across the at least two electrodes adjacent to each other. The electrode connection structure is characterized in that the electrode width across the electrode connection portion is n (integer) electrodes and at least n-1 missing portions are arranged.
[0025]
【The invention's effect】
As described above, according to the liquid crystal display panel of the present invention, a liquid crystal display in which an integrated large substrate is laid out with a cutting line and cut by a scribe break, and the first substrate and the second substrate are integrated. When forming a plurality of panels, the cutting line is off the center of the gap between the patterns of the voltage introduction pattern group corresponding to one and the other liquid crystal display panel, and the voltage introduction pattern group corresponding to one liquid crystal display panel The voltage introduction pattern group of one liquid crystal display panel part remains in the voltage introduction pattern group in the other liquid crystal display panel equivalent part, but this remaining part is the front part of the pattern. TAB film lead pattern because it is a part of one and the other pattern part which is the leading part of the wide pattern and each is an independent pattern. Are bonded to the voltage introduction pattern of the voltage introduction pattern group of the liquid crystal display panel via an anisotropic conductive film, the patterns are short-circuited even if the lead pattern of the FPC contacts the remaining portion described above. There is no. For this reason, a defective product as a liquid crystal display device does not appear and the yield is improved.
[Brief description of the drawings]
FIG. 1 is a plan view of a liquid crystal display panel.
FIG. 2 is a plan view of a main part in a state where an integrated large-sized substrate for taking a large number of liquid crystal display panels is assembled.
FIG. 3 is an explanatory diagram of an embodiment in a state in which a voltage introduction pattern group corresponding to one liquid crystal display panel is abutted against a voltage introduction pattern group corresponding to the other liquid crystal display panel in the integrated large-sized substrate.
FIG. 4 is an explanatory diagram of an embodiment of a connection state between a voltage introduction pattern group and an FPC electrode pattern group in a liquid crystal display panel.
FIG. 5 is an explanatory diagram showing a state where a voltage introduction pattern group corresponding to one liquid crystal display panel is abutted against a voltage introduction pattern group corresponding to the other liquid crystal display panel in a conventional integrated large-sized substrate.
FIG. 6 is an explanatory diagram of a connection state between a voltage introduction pattern group and an FPC electrode pattern group in a conventional liquid crystal display panel.
[Explanation of symbols]
2 1st board | substrate 3 2nd board | substrate 4 Voltage introduction pattern group 4A 1st pattern 4B 2nd pattern 4B-1 Remaining part 4C 3rd pattern 4D 4th pattern 4E 5th pattern 5 Voltage introduction pattern group 5A 1st Pattern 5B Second pattern 5C Third pattern 5D Fourth pattern 5E Fifth pattern 7 Liquid crystal display panel equivalent part 7-1 Liquid crystal display panel equivalent part 7-2 Liquid crystal display panel equivalent part 8 Gap 9 FPC
DESCRIPTION OF SYMBOLS 10 Electrode pattern 10A 1st pattern 10B 2nd pattern 10C 3rd pattern 10D 4th pattern 10E 5th pattern 10F 6th pattern 20 Notch part 21 One pattern part 22 The other pattern part 23 Notch part 24 One pattern portion 25 The other pattern portion 30 First large substrate 31 Second large substrate 32 Integrated large substrate

Claims (5)

In a liquid crystal panel having a configuration in which liquid crystal is sealed between first and second substrates having electrodes,
The first substrate is provided with an electrode terminal group including a plurality of electrode terminals for inputting signals to the liquid crystal panel,
The electrode terminal group has at least two types of electrode terminals, a first electrode terminal having a narrow width and a second electrode terminal having a width wider than the first electrode terminal ,
The liquid crystal panel according to claim 1, wherein an electrode notch portion formed so as to divide the end portion in the width direction is provided at an end portion of the second electrode terminal on the first substrate end side.   The liquid crystal panel according to claim 1, wherein the second electrode terminal has a width straddling the two first electrode terminals provided on the first substrate.   Between the end portions of the first and second electrode terminals and the end side of the first substrate adjacent to the end portions, the first and second electrode terminals have substantially the same width, and the first and second electrode terminals have the same width. The liquid crystal panel according to claim 1, wherein an electrode independent from the two-electrode terminal is provided.   4. The liquid crystal panel according to claim 3, wherein a width of an end of the second electrode terminal left adjacent to the electrode notch is substantially the same as a width of the first electrode terminal. 5. A first electrode for obtaining a plurality of liquid crystal panels is formed on the first large substrate, and at least a second electrode for obtaining a plurality of liquid crystal panels is formed on the second large substrate. The second large substrate is disposed with a gap so that the electrodes face each other, and a plurality of frame-shaped seals for sealing the liquid crystal are disposed in the gap to form a single large substrate. In the manufacturing method of the liquid crystal panel obtained by cutting by the process,
A plurality of first electrodes corresponding to adjacent liquid crystal panels on the first large-sized substrate are arranged with their electrode ends facing each other, and the opposing electrodes have at least two types having a narrow electrode width and a wider electrode width. An end portion of the electrode having a wide electrode width is provided with at least one notch portion of the electrode from the end portion toward the liquid crystal, and the cutting in the cutting step starts from the electrode notch portion. A method for manufacturing a liquid crystal panel, comprising: an electrode having a notch and an end portion of the electrode of the adjacent liquid crystal panel facing each other.

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