WO2000028373A1

WO2000028373A1 - Liquid crystal display device

Info

Publication number: WO2000028373A1
Application number: PCT/JP1999/006190
Authority: WO
Inventors: Hiroki Nakahara; Masaru Ito; Takeshi Nakamura; Keiichi Suehiro
Original assignee: Seiko Epson Corporation
Priority date: 1998-11-11
Filing date: 1999-11-05
Publication date: 2000-05-18
Also published as: CN1149438C; JP3508723B2; KR100473456B1; KR20010033956A; CN1288527A

Abstract

A liquid crystal panel (1), wherein signals are directly input from a second external input terminal (82) to a second electrode pattern (50) which is routed to both sides on a second substrate (20) so as to avoid a first electrode pattern (40) formed on a first substrate (10), and signals are input by substrate-to-substrate conduction to the first electrode pattern (40) which can form straight substrate-to-substrate conduction terminals (60, 70) when signals are input by that conduction. Therefore, a substrate-to-substrate conduction is not necessary in portions where patterns must be extended slantly and a second electrode pattern (50) that can narrow a pattern-to-pattern distance need only be formed in those portions.

Description

Description Liquid crystal display device Technical field

The present invention relates to a liquid crystal display device. More specifically, the present invention relates to an electrode structure on each substrate of a liquid crystal panel constituting a liquid crystal display device. Background art

FIG. 11 is an exploded perspective view of a conventional liquid crystal panel. FIG. 12 is an enlarged plan view showing electrode patterns and terminals formed on the first substrate 10X of the liquid crystal panel shown in FIG. FIG. 12 is an enlarged plan view showing an electrode pattern and terminals formed on the second substrate 20Y of the liquid crystal panel shown in FIG. FIG. 14 is an enlarged plan view showing an electrode pattern and a terminal when the first substrate 10X shown in FIG. 12 and the second substrate shown in FIG. 13 are bonded to each other. It is.

FIG. 11 shows a substrate 10 X on which a first electrode pattern 40 X is formed and a substrate 20 Y on which a second electrode pattern 50 Y is formed. It shows a passive matrix type liquid crystal display device that drives a liquid crystal sandwiched between electrode patterns. Such a passive matrix type liquid crystal display device is disassembled in FIG. 11, and as shown in a schematic diagram 旳, a sealing material is provided between a pair of substrates bonded by a sealing material 30 with a predetermined gap therebetween. The liquid crystal sealing area 35 is defined by 30, and liquid crystal is sealed in the liquid crystal sealing area 35.

In the liquid crystal panel 1 having such a configuration, the second electrode pattern 50 Y and the external input terminal 82 X are connected to the first inter-substrate conduction—terminal 60 X and the second inter-substrate conduction terminal. It is electrically connected by arranging a conducting material between the Y and Y. Therefore, a signal for driving the liquid crystal can be applied from the external input terminal 82X formed on the first substrate to the second electrode pattern 50Y formed on the second substrate 20Y. . This In such a liquid crystal panel 1, external input terminals 8 IX and 8 2, both formed on a first substrate, are connected to first electrode patterns 40 formed on different substrates. A signal for driving the liquid crystal can be input to X and the second electrode pattern 50Y.

In the liquid crystal panel shown in FIG. 11, the external input terminals 81 X and 82 X are formed in a first terminal formation region near the substrate side 101 X of the first substrate. The conduction between the first inter-substrate conduction terminal 60 X and the second inter-substrate conduction terminal 70 Y is determined by the first terminal formation region and the vicinity of the substrate side 201 X of the second substrate. This is performed in the second terminal formation region 21Y. Here, since the board sides 101 X and 201 Y are sides extending in the same direction, the external input terminals 81 X and 82 X are connected to a flexible board (not shown), a rubber connector, or the like. One end of the first terminal formation region 11 X is not overlapped with the substrate 20 Y, that is, the second substrate 20 Y It is formed on a protruding portion 15 X protruding from the substrate side 201 Y. The external input terminals 8 1 X and 8 2 X formed there are close to the substrate side 101 X, through a flexible substrate (not shown), a rubber connector, or directly driven by a liquid crystal. Connected to an external circuit such as a driver. On the other hand, in order to make the first inter-substrate conduction terminal 60 X and the second inter-substrate conduction terminal 70 Y conduct, the other end of the first terminal formation region 1 IX is The second terminal forming region 21Y of the substrate 20Y is formed so as to extend to a region that planarly overlaps the second terminal forming region 21Y.

FIGS. 12 and 13 respectively show a part of each terminal forming area formed on the first substrate 10X and the second substrate 20Y used for the conventional liquid crystal panel 1. It is a top view which expands and shows.

In FIGS. 11 and 12, the first terminal forming region 11 X formed along the substrate side 101 X of the first substrate 10 X includes the substrate side 101 A plurality of first external input terminals 81 X arranged in the central region of X are formed. In addition, a plurality of second external input terminals 8 2 arranged along the substrate side 101 X in regions corresponding to both sides (both ends) of the region where the first external input terminals 81 X are formed. X is formed. Soshi From the first external input terminal 81X, a plurality of rows of first electrode patterns 40X for driving liquid crystal are formed, and from the second external input terminal 82X, the second substrate 20Y is formed. The first inter-substrate conduction terminal 60X extends to a position overlapping the second terminal formation region 21Y. The first electrode pattern 40X, the first external input terminal 8IX, the second external input terminal 82X, and the first inter-substrate conduction terminal 60X are all IT〇 films (Indium film). (Tin oxide / transparent conductive film).

On the other hand, in the second substrate 20Y, as can be seen from FIGS. 11 and 13, of the second terminal formation region 21Y, the first inter-substrate of the first substrate 10X is connected. At a position corresponding to the common terminal 60X, a plurality of second inter-substrate conduction terminals 70Y are formed along the substrate side 201Y. From these second inter-substrate conduction terminals 70Y, the area corresponding to both sides of the formation area of the first electrode pattern 40X is wrapped around and intersects with the first electrode pattern 40X in the liquid crystal sealing area 35. A plurality of rows of second electrode patterns 50Y for driving a liquid crystal are formed so as to extend. The second electrode pattern 50Y and the second inter-substrate conduction terminal 70 # are also formed of an ITO film or the like. As described above, on the second substrate 20Y, the second electrode pattern is formed so as to go around the area corresponding to both sides of the first electrode pattern 40X formed on the first substrate 10X while avoiding the area where the first electrode pattern 40X is formed. It is necessary to extend 50Y from the second inter-substrate conduction terminal 70Y. Therefore, the second inter-substrate conduction terminal 70Y is located in a region near the end of the first electrode pattern 40X formation region formed on the first substrate 10X (the center region side of the substrate side 201Y). Is formed in a straight line, but the farther away from it, the more dogs occupy the diagonally extending part (diagonal part 702 Y). However, unlike the normal wiring part, the second inter-substrate conduction terminal 70Y is for conducting conductive connection with the first inter-substrate conduction terminal 60X with a conductive material sandwiched between the substrates. Therefore, a short circuit is likely to occur between adjacent terminals. Therefore, in order to surely prevent such a short circuit between terminals, it is necessary to secure a sufficiently wide interval between adjacent terminals. For this reason, the second inter-substrate conductor formed in a region (both ends of substrate side 201Y) distant from the end of the region where first electrode pattern 40X is formed. Four

In the common terminal 70 Y, a large difference is made in the length dimension of the straight part 70 1 Y between the adjacent terminals, and from there, diagonally toward the sides 103 X of both sides of the substrate 100 mm. By forming the wiring by bending, a wide interval between the oblique portions 70 2 Υ of the second inter-substrate conduction terminals 70 Υ is ensured. Therefore, as can be seen from FIG. 13, the line を connecting the boundary between the linear portion 70 1 Υ and the oblique portion 70 2 Υ at the second terminal 70 間 for inter-substrate conduction is the substrate side 200 1 The angle formed by Υ is quite large.

On the other hand, in a portion where the second inter-substrate conduction terminal 70 Υ extends straight toward a region near the region where the first electrode pattern 40 X is formed, the second electrode extending therefrom extends. Even if the pattern 50Υ is oblique, the conduction between the substrates by the conductive material is not performed in the oblique portion 502 2, so that the interval between adjacent patterns can be considerably reduced. Therefore, in the second electrode pattern 50 °, the angle formed by the line connecting the boundary between the linear portion 501 ′ and the slanted portion 502 ′ with the substrate side 201Y is considerably small. ing.

In configuring the liquid crystal panel 1 using the first substrate 10X and the second substrate 20 # thus configured, as shown in FIGS. 11 and 14, When bonding the substrate 10 Χ of the second substrate 20 Χ and the second substrate 20 して via the sealing material 30, the gap material and the conductive material are compounded in the sealing material 30, and the sealing material 3 0 is also formed by coating or printing in a region where the first inter-substrate conduction terminal 60 X and the second inter-substrate conduction terminal 70 # overlap. Therefore, when the first substrate 10Χ and the second substrate 20Υ are pasted together via the seal material 30Υ, the first substrate 10 により is bonded by the conductive material contained in the seal material 30 0. The conduction terminal 60 X and the second inter-substrate conduction terminal 70 7 conduct. Further, when the first substrate 10Χ and the second substrate 20Υ are bonded together, the pixels 5 are arranged in a matrix by the intersection of the first electrode pattern 40Χ and the second electrode pattern 50Υ. It is formed in a shape. -For this reason, after mounting the flexible substrate at a position near the substrate side 101X of the first terminal formation area 11X of the first substrate 10X using an anisotropic conductive material or the like, When signals are input to the first external input terminal 8 1 X and the second external input terminal 8 2 の of the first substrate 10 X through this flexible substrate, Image data can be applied to the first electrode pattern 40 X formed on the first substrate 10 X via the first external input terminal 81 X, and the second electrode pattern The second electrode pattern 50 Y formed on the substrate 20 Y includes a first external input terminal 82 X, a first inter-substrate conduction terminal 60 X, a conductive material, and a second substrate. A scanning signal can be applied through the inter-connection terminal 70Y. However, in the above-described conventional technique, conduction is performed using the second inter-substrate conduction terminal 70Y that extends obliquely. Therefore, if the terminal width of the inter-substrate conduction terminal or the width between adjacent terminals is to be ensured to ensure the reliability of the inter-substrate conduction, a straight line portion between adjacent terminals is obtained. By making a large difference in the length dimension of the gap, it is necessary to secure a fairly sufficient interval in the oblique portion 70 2 Y. That is, there is a problem that this area outside the display area is wasted. For this reason, in the conventional electrode structure, the outermost pattern of the first electrode pattern 40X formed on the first substrate 10X has a corner portion bent near the display area, and (The width of the area indicated by arrow B) between the second terminal formation area 21 1 Y and the base end of the outermost terminal (the width of the area indicated by arrow B). There is a problem that the number of conductive terminals 70 Y cannot be increased much. If the number of second electrode patterns 50 Y and the number of second inter-substrate conduction terminals 70 Y are increased, as shown in FIG. 14, the second electrode patterns 5 There is a problem in that Y overlaps the first electrode pattern 40X, and the probability that a short circuit occurs between the substrates increases. In order to increase the number of the second electrode patterns 50 Y and the number of the second inter-substrate conduction terminals 70 Y, the oblique portion 70 0 2 of the second inter-substrate conduction terminals 70 Y is used. If the area for adding the second electrode pattern 50Y is secured by reducing the interval of Y, the probability that a short circuit will occur between adjacent terminals increases. Furthermore, the area width indicated by the arrow B is reduced by reducing the line width and the interval of the second electrode pattern 50Y and the second inter-substrate conduction terminal 70Y, thereby forming the second electrode pattern 50Y. If an additional area is secured, the electric resistance (wiring resistance) increases and the display quality deteriorates.

Therefore, an object of the present invention is to form one of a pair of substrates holding a liquid crystal on a substrate. -

6 In the liquid crystal panel of the type that inputs signals from the external input terminals that are formed and conducts signals between the substrates by using a conductive material sandwiched between the substrates to input signals to the other substrate, An object of the present invention is to provide a configuration that can increase the number of electrode patterns for driving a liquid crystal without deteriorating reliability and display quality by effectively using a wiring region of the region. Disclosure of the invention

In order to solve the above-mentioned problem, the present invention provides a first inter-substrate conduction terminal disposed adjacent to a side of a substrate, and the first inter-substrate conduction terminal, A first substrate having a first electrode pattern disposed so that the first inter-substrate conduction terminal extends toward a side facing an adjacent side; and a first substrate disposed adjacent to the side of the substrate. A first external input terminal; a second inter-substrate conduction terminal electrically connected to the first external input terminal; and a second external input terminal disposed on both sides of the first external input terminal. A second substrate having two external input terminals, and a second electrode pattern electrically connected to the second external input terminal, wherein the first substrate and the second substrate are provided. The substrate is paired so that the first electrode pattern and the second electrode pattern extend in a direction crossing each other. The first inter-substrate conduction terminal and the second inter-substrate conduction terminal are arranged by a conductive material sandwiched between the first substrate and the second substrate. It is characterized by being electrically connected.

In the first liquid crystal display device of the present invention, the first inter-substrate conduction terminal formed on the first substrate and the second inter-substrate conduction terminal formed on the second substrate are connected by a conductive material. , So-called inter-substrate conduction is performed to electrically connect the first electrode pattern on the first substrate to the first external input terminal on the second substrate. . In the present invention, in performing the inter-substrate conduction, the first electrode pattern formed so as to extend toward the opposite side of the side on which the first inter-substrate conduction terminal is formed is attached to the second substrate. It is connected to the formed first external input terminal. Also, a second electrode pattern formed to extend in a direction intersecting with the first electrode pattern. Are connected to the second external input terminals arranged on both sides of the first external input terminals without conducting between the substrates. According to this configuration, since the first electrode pattern is used for inter-substrate conduction, the number of second electrode patterns can be increased without concern for reliability of inter-substrate conduction. . This is because even if the number of patterns in the part where the pattern must be extended obliquely (for example, A in Fig. 4) increases, this pattern is not a pattern used for inter-substrate conduction. This is because it can be narrow. Therefore, even if the number of the second electrode patterns is increased, it is not necessary to reduce the interval between the inter-substrate conduction terminals, and it is not necessary to reduce the line width of the first pattern. Therefore, according to the present invention, the number of electrode patterns for driving a liquid crystal can be increased without lowering the reliability and display quality. Also, even if the number of second electrode patterns is not increased so much, it is possible to narrow the portion where the pattern must be extended diagonally, so that a liquid crystal panel whose external dimensions are the same as the conventional size can be obtained. The display area can be expanded.

Further, in the present invention, it is preferable that the first inter-substrate conduction terminal and the second inter-substrate conduction terminal are linearly arranged toward a side facing an adjacent side. In other words, a sufficient distance between the terminals can be ensured by not forming the first conductive terminal and the second conductive terminal between the substrates in a region where the conductive between the substrates is performed. This improves the reliability of conduction between the substrates.

In the present invention, it is preferable that image data is supplied to the first electrode pattern, and a scanning signal is supplied to the second electrode pattern. In the liquid crystal device having such a configuration, the first electrode pattern includes, for example, the first external input terminal, the second inter-substrate conduction terminal, the conduction material, and the first inter-substrate conduction. Used as a data electrode pattern to which image data is supplied via a terminal, and the second electrode pattern is used as a scan electrode pattern to which a scan signal is applied via the second external input terminal. Become.

A second liquid crystal display device according to the present invention is a liquid crystal display device comprising: A conduction terminal, electrically connected to the first inter-substrate conduction terminal, and arranged such that the first inter-substrate conduction terminal extends toward a side facing an adjacent side; A first substrate having a first electrode pattern, an external input terminal disposed adjacent to a side of the substrate, a second inter-substrate conduction terminal, and a second electrode pattern. A second substrate, which is disposed so as to face the first electrode pattern and the second electrode pattern so as to extend in a direction intersecting each other, and is mounted on the second substrate, and an input terminal is provided. A drive IC electrically connected to the external input terminal, and an output terminal electrically connected to the second inter-substrate conduction terminal and the second electrode pattern. The inter-substrate conduction terminal and the second inter-substrate conduction terminal are disposed in front of the first substrate. Characterized in that it is electrically connected by a conducting material sandwiched between the second substrate.

In the second liquid crystal display device of the present invention, a first inter-substrate conduction terminal formed on the first substrate and a second inter-substrate conduction terminal formed on the second substrate are connected by a conductive material. A so-called inter-substrate continuity is established. Therefore, the first electrode pattern on the first substrate is connected to the output terminal of the driver IC mounted on the second substrate via the first and second terminals for conduction between the substrates. . In performing the inter-substrate conduction in the present invention, the first electrode pattern formed so as to extend toward the side opposite to the side on which the first inter-substrate conduction terminal is formed is used. Further, a second electrode pattern arranged so as to extend in a direction intersecting with the first electrode pattern is connected to an output terminal of the driving IC without conducting between the substrates. According to this configuration, since the first electrode pattern is used for inter-substrate conduction, the number of second electrode patterns can be increased without concern for the reliability of inter-substrate conduction. This is because even if the number of patterns in a portion where the pattern must be extended obliquely (for example, A in FIG. 4) increases, this pattern is not a pattern used for inter-substrate conduction, so that a pattern between adjacent patterns is used. This is because the width can be reduced. Therefore, even if the number of the second electrode pads is increased, it is not necessary to reduce the distance between the inter-substrate conduction terminals, and it is not necessary to reduce the line width of the first pattern. Therefore, according to the present invention, reliability -

9

It is possible to increase the number of electrode patterns for driving the liquid crystal without deteriorating the display quality.

Further, in the second liquid crystal display device of the present invention, various configurations used for the above-described first liquid crystal display device can be adopted.

(1) The first conduction terminal and the second inter-substrate conduction terminal are formed linearly toward the side opposite to the side on which they are formed.

(2) Image data is supplied to the first electrode pattern, and a scanning signal is supplied to the second electrode pattern.

Various configurations such as can be adopted.

The functions and effects of the above (1) and (2) are equivalent to those of the above-described first liquid crystal display device according to the present invention, and a description thereof will not be repeated. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing the appearance of a liquid crystal panel used in a liquid crystal display device according to Embodiment 1 of the present invention.

FIG. 2 is a perspective view schematically showing a state in which the liquid crystal panel shown in FIG. 1 is disassembled.

FIG. 3 is an enlarged plan view showing an electrode pattern and terminals formed on a first substrate of the liquid crystal panel shown in FIG.

FIG. 4 is an enlarged plan view showing an electrode pattern and terminals formed on a second substrate of the liquid crystal panel shown in FIG.

FIG. 5 is an enlarged plan view showing electrode patterns and terminals when the first substrate shown in FIG. 3 and the second substrate shown in FIG. 4 are bonded together.

FIG. 6 is a perspective view showing an appearance of a liquid crystal panel used in a liquid crystal display device according to Embodiment 2 of the present invention.

FIG. 7 is a perspective view schematically showing a state in which the liquid crystal panel shown in FIG. 6 is disassembled. Ten

FIG. 8 is an enlarged plan view showing an electrode pattern and terminals formed on a first substrate of the liquid crystal panel shown in FIG.

FIG. 9 is an enlarged plan view showing an electrode pattern and terminals formed on a second substrate of the liquid crystal panel shown in FIG.

FIG. 10 is an enlarged plan view showing an electrode pattern and terminals when the first substrate shown in FIG. 8 and the second substrate shown in FIG. 9 are bonded together.

FIG. 11 is an exploded perspective view of a conventional liquid crystal panel.

FIG. 12 is an enlarged plan view showing an electrode pattern and terminals formed on a first substrate of the liquid crystal panel shown in FIG.

FIG. 13 is an enlarged plan view showing electrode patterns and terminals formed on a second substrate of the liquid crystal panel shown in FIG.

FIG. 14 is an enlarged plan view showing an electrode pattern and terminals when the first substrate shown in FIG. 12 and the second substrate shown in FIG. 13 are bonded together. BEST MODE FOR CARRYING OUT THE INVENTION

Embodiments of the present invention will be described with reference to the accompanying drawings.

[Embodiment 1]

(overall structure)

FIG. 1 is a perspective view showing the appearance of a liquid crystal panel used in the liquid crystal display device of the present embodiment, and FIG. 2 is a perspective view schematically showing an exploded state of the liquid crystal panel. FIG. 3 is an enlarged plan view showing electrode patterns and terminals formed on a first substrate of the liquid crystal panel shown in FIG. FIG. 4 is an enlarged plan view showing an electrode pattern and terminals formed on a second substrate of the liquid crystal panel shown in FIG. Note that FIGS. 1 and 2 only schematically show the electrode patterns and terminals and the like. This will be described later with reference to FIG. In FIGS. 1 and 2, a liquid crystal panel 1 used in a passive matrix type liquid crystal display device mounted on an electronic device such as a mobile phone is made of glass or plastic through a predetermined gap. The first substrate 10 and the second substrate 20 are bonded to each other with the sealant 30 interposed therebetween. Liquid crystal is sealed in a liquid crystal sealed area 35 partitioned by the sealing material 30. The first substrate 10 has a plurality of rows of first electrode patterns 40 extending in the vertical direction in the liquid crystal enclosing area 35, and the second substrate 20 has a liquid crystal encapsulating area 35. The second electrode pattern 50 extending in the horizontal direction is formed in a plurality of rows.

In the liquid crystal panel 1 shown here, a polarizing plate 5 is attached to the outer surface of the second substrate 20 with an adhesive or the like, and the polarizing plate 6 is also attached to the outer surface of the first substrate 10 with an adhesive or the like. ing. When the liquid crystal panel 1 is configured as a reflection type, a reflection plate (not shown) is attached to the outside of the polarization plates 5 and 6, or instead of the polarization plates 5 and 6.

In the liquid crystal panel 1 configured as described above, the first and second external input terminals 81 and 82 are formed in the second terminal formation region near the substrate side 201 of the second substrate. The conduction between the first inter-substrate conduction terminal 60 and the second inter-substrate conduction terminal 70 is determined by the first terminal formation region 11 near the substrate side 101 of the first substrate and the second This is performed in the terminal formation area 21. Here, since the first substrate sides 101, 102 extend in the same direction, the first and second external input terminals 81, 82 are connected to a flexible substrate (not shown). One end of the second terminal formation region 21 does not overlap with the substrate 10, that is, the first substrate, for connection to an external circuit such as a driver for driving a liquid crystal, or via a rubber connector or directly. It is formed at the portion protruding from the substrate side 101 of 10. Therefore, a substrate larger than the first substrate 10 is used as the second substrate 20. On the other hand, in order to make the first inter-substrate conduction terminal 60 and the second inter-substrate conduction terminal 70 conduct, the other end of the second terminal formation region 21 is connected to the first substrate 1 The first terminal formation region 11 of 0 is formed so as to extend to a region overlapping with the first surface. In this embodiment, as shown in FIG. 2 and FIG. 3, the first terminal formation region 11 is formed along the central portion of the substrate side 101 of the first substrate 10, Terminal formation c

1 2

In the region 11, a plurality of first inter-substrate conduction terminals 60 are arranged at predetermined intervals along the substrate side 101. In the first substrate 10, a plurality of rows of first electrode patterns 40 for driving liquid crystal are arranged on both sides from the first inter-substrate conduction terminal 60 toward the opposing substrate side 102. After spreading and extending obliquely, it extends in a direction perpendicular to the substrate sides 101 and 102 in the liquid crystal sealing region 35. Here, the first electrode pattern 40 and the first inter-substrate conduction terminal 60 are formed of an ITO film formed in a predetermined pattern.

As shown in FIGS. 2 and 4, in the second substrate 20, the second terminal formation region 21 is also formed along the substrate side 201, and the second terminal formation region 21 is formed over a relatively wide range excluding both ends of the substrate side 201. The second terminal forming region 21 has a plurality of first external input terminals 81 arranged at predetermined intervals along the substrate side 201 in a central region thereof, and these first external input terminals 81. A plurality of second external input terminals 82 are formed at two locations on both sides of the region where the terminals 81 are formed and are arranged at a predetermined interval along the substrate side 201. Here, the first external input terminal 81 and the second external input terminal 82 are both opposed to the substrate side 202 in the second terminal formation region 21 (see FIG. 2). ).

Further, in the second substrate 20, the first external input terminal 81 provides a first inter-substrate conduction when the first substrate 10 and the second substrate 20 are bonded to each other. A plurality of second inter-substrate conduction terminals 70 overlapping the terminals 60 extend linearly toward the substrate side 202.

Further, in the second substrate 20, the second external input terminal 82 allows the first electrode pattern 40 to be formed when the first substrate 10 and the second substrate 20 are bonded to each other. A plurality of rows of liquid crystal driving second electrode patterns 50 are formed so as to go around the area corresponding to both sides of the formation area. These second electrode patterns 50 extend so as to intersect with the first electrode patterns 40 in the liquid crystal sealing region 35. That is, the wiring of the second electrode pattern 50 formed on the second substrate 20 is When the first substrate 10 and the second substrate 20 are bonded to each other, each region corresponding to a plane on both sides of the region where the first electrode pattern 40 is formed on the first substrate 10 After extending obliquely toward the side 203 on each of the two sides, along the liquid crystal filled area 35 (or the side 203 of the substrate 20), facing the opposite substrate side 202 And then extend in parallel with the substrate sides 201 and 202 in the liquid crystal filled area 35. Here, the second electrode pattern 50, the first external input terminal 81, the second external input terminal 82, and the second inter-substrate conduction terminal 70 are all formed in a predetermined pattern. It is formed by the formed IT 0 film.

In configuring the liquid crystal panel 1 using the first substrate 10 and the second substrate 20 configured as described above, in the present embodiment, the first substrate 10 and the second substrate 20 are sealed. When bonding via the material 30, a gap material and a conductive material are compounded in the seal material 30, and the seal material 30 is connected to the first board-to-board conductive terminal 60 and the second board. It is also formed in a region where the conduction terminals 70 overlap. Here, the conductive material contained in the seal material 304 is, for example, a metal particle or a particle obtained by plating the surface of an elastically deformable plastic bead, and plating is performed on the surface of the elastically deformable plastic bead. In the case of the applied particles, the particle size is about 6.6 / m. On the other hand, the particle size of the gap material included in the sealing material 304 is about 5.6 μm. Therefore, when the sealing material 30 is melted and cured while applying a pressing force to narrow the gap in a state where the first substrate 10 and the second substrate 20 are overlapped, the conductive material becomes The first inter-substrate conduction terminal 60 and the second inter-substrate conduction terminal 70 are conducted in a state of being crushed between the first substrate 10 and the second substrate 20.

As shown in FIG. 5, when the first substrate 10 and the second substrate 20 are pasted together via the sealing material 30, the first electrode pattern 40 and the second electrode pattern 50 Pixels 5 are formed in a matrix by the intersection with. For this reason, the flexible substrate 9 is attached to the edge of the second terminal formation region 21 of the second substrate 20 on the substrate side 201 side. 0 is mounted using an anisotropic conductive material or the like, and then the first external input terminal 81 and the second external input terminal of the second substrate 20 are passed through an external circuit such as the flexible substrate 90. When a signal is input to the terminal 82, a scanning signal can be applied to the second electrode pattern 50 formed on the second substrate 20 via the second external input terminal 82. The first electrode pattern 40 formed on the first substrate 10 includes a first external input terminal 81, a second inter-substrate conduction terminal 70, a conductive material, Image data can be input as a signal via one substrate-to-substrate conduction terminal 60. Therefore, the first electrode pattern is formed at each pixel 5 by these image data and scanning signals.

Since the alignment state of the liquid crystal positioned between 40 and the second electrode pattern 50 can be controlled, a predetermined image can be displayed.

Conventionally, for the first electrode pattern 40 in the vertical direction, a signal is directly input from the external input terminal without going through the vertical conduction between the substrates, and the first electrode pattern 40 is avoided. As described above, signals are input to the second electrode patterns 50 in the horizontal direction that are routed to both sides through the obliquely extending inter-substrate conduction terminals. On the other hand, in the present embodiment, the second external electrode pattern 50 extended to both sides so as to avoid the first electrode pattern 40 has the second external input without passing through the vertical conduction between the substrates. Input signal directly from input terminal 82. On the other hand, a signal is input to the first electrode pattern 40 in the vertical direction from the external input terminal 81 via conduction between the substrates. Therefore, it is not necessary to form the inter-substrate conduction terminals obliquely, so that the first inter-substrate conduction terminals 60 and the second inter-substrate conduction terminals 70 can be formed straight. In other words, the pattern must be extended diagonally (the second electrode pattern

The pattern must be formed obliquely between the corner where the innermost pattern of 50 is bent near the display area and the corner of the outermost pattern of the second electrode pattern 50. Since there is no need to conduct between the substrates in an area where the area cannot be obtained (the area width indicated by the arrow A), stable connection is ensured and connection reliability is improved. In addition, the distance (pitch interval) between the patterns can be reduced in a portion where the pattern must be obliquely extended, and the second electrode pattern 50 having a reduced pitch is formed. For this reason In the second electrode pattern 50, the linear portion 501 may be bent obliquely with a small difference in length between adjacent patterns, and the oblique portion of the second electrode pattern 50 may be formed. The interval between 502 can be reduced. Therefore, as can be seen from FIG. 4, the angle す formed by the line F connecting the boundary between the linear portion 501 and the oblique portion 502 in the second electrode pattern 50 with the substrate side 201 is small. For this reason, a large number of patterns can be formed even in such a region having a large layout constraint. Therefore, even when the number of patterns formed in such a region with a large restriction on the layout is increased, the distance between the first inter-substrate conduction terminal 60 and the second inter-substrate conduction terminal 70 is reduced. There is no need to reduce the line width of the pattern. Therefore, according to the present embodiment, it is possible to increase the number of electrode patterns for driving the liquid crystal without deteriorating reliability or display quality. In addition, liquids that require vertical conduction between substrates

According to the panel, if the number of patterns is equal, the portion where the pattern must be extended obliquely on the second substrate 20 can be made narrower than before, so that the external dimensions can be reduced and the external dimensions are equal In the liquid crystal panel 1 having a size, an extended and wider display area can be secured. Furthermore, if the portion of the second substrate 20 where the pattern must be extended obliquely can be made smaller than before, the outer dimensions of the liquid crystal panel 1 having the same display area as the conventional one can be reduced. Can be smaller.

[Embodiment 2]

In the LCD panel 1, the driving IC may be mounted on the substrate by COG (Chipon 1 ass) or COP (Chipon P lastic Panel). In this case, the driving IC is externally mounted. Inputs signals and outputs image data signals and scanning signals from the driving IC to each electrode pattern. The case where the present invention is applied to such a type of liquid crystal panel will be described with reference to FIGS. 6, 7, 8, 9, and 10. FIG.

FIG. 6 is a perspective view showing the appearance of a liquid crystal panel used in the liquid crystal display device of the present embodiment. FIG. 7 is a perspective view schematically showing a disassembled state of the liquid crystal panel. FIG. 8 is an enlarged plan view showing electrode patterns and terminals formed on a first substrate of the liquid crystal panel shown in FIG. FIG. 9 is an enlarged plan view showing an electrode pattern and terminals formed on a second substrate of the liquid crystal panel shown in FIG. FIGS. 6 and 7 only schematically show the electrode patterns and terminals, etc. For details, FIG. 8 and FIG. It will be described later with reference to FIG.

6 and 7, in the liquid crystal panel 1 of the present embodiment, a first substrate 10 and a second substrate 20 made of glass, plastic, or the like are interposed via a predetermined gap. And are bonded to face each other. Liquid crystal is sealed in a liquid crystal sealing area 35 partitioned by the sealing material 30. On the first substrate 10, a plurality of rows of first electrode patterns 40 extending in the vertical direction in the liquid crystal sealing region 35 are formed, and on the second substrate 20, the first electrode pattern 40 is formed in the liquid crystal sealing region 35. The second electrode pattern 50 extending in the horizontal direction is formed in a plurality of rows. In the liquid crystal panel 1 shown here, a polarizing plate 5 is stuck on the outer surface of the second substrate 20, and a polarizing plate 6 is stuck on the outer surface of the first substrate 10. When the liquid crystal panel 1 is configured as a reflection type, a reflection plate (not shown) is attached to the outside of the polarization plates 5 and 6, or instead of the polarization plates 5 and 6.

In the liquid crystal panel 1 configured as described above, the first substrate formed on each of the first substrate 10 and the second substrate 20 is used for both external signal input and conduction between the substrates. The terminal forming region 11 and the second terminal forming region 21 are used. Therefore, as the second substrate 20, a substrate larger than the first substrate 10 is used, and when the first substrate 10 and the second substrate 20 are bonded and superimposed, the first substrate The flexible board 90 or a rubber connector (not shown) such as a conductive rubber is used by using a protruding portion where the second board 20 extends from the board side 101 of the board 10. Connection is made.

In constructing such a connection structure, in the present embodiment, as shown in FIGS. 7 and 8, in the first substrate 1 ◦, the first terminal formation region 11 is formed by the first substrate The first terminal formation region 11 is formed along the center portion of the substrate side 101 of the substrate 10. In the first terminal formation region 11, a plurality of first inter-substrate conduction terminals 60 are predetermined along the substrate side 101. Are arranged at intervals of. Further, in the first substrate 10, a plurality of rows of first electrode patterns 40 for driving liquid crystal spread on both sides from the first inter-substrate conduction terminal 60 to the opposing substrate side 102. After extending obliquely, it is formed to extend in a direction orthogonal to the substrate sides 101 and 102 in the liquid crystal sealing region 35.

As shown in FIGS. 7 and 9, in the second substrate 20, the second terminal formation region 21 is also formed along the substrate side 201, and this second terminal formation region 21 is formed over a relatively wide range excluding both ends of the board side 201, and the second terminal formation region includes a plurality of external input terminals arranged at a predetermined interval along the board side 201. 80 are formed. The external input terminal 80 extends linearly toward the opposing substrate side 202 (see FIG. 7) in the second terminal formation region 21. A driving IC 8 that supplies image data to the first electrode pattern 40 and supplies a second electrode pattern 50 is mounted on the overhang portion 25. The input terminal of the driving IC 8 is connected to the external input terminal 80 (the connection between the external input terminal 80 and the driving IC is omitted.). Is input to the driving IC 8 from the driving terminal 80. The output terminal of the driving IC is connected to the first electrode pattern 40 via the second electrode pattern 50 and the first and second inter-substrate conduction terminals 60 and 70. ing.

In the present embodiment, a semiconductor (IC) mounting area 7 is formed on the second substrate 20 in an area adjacent to the external input terminal 80 on the liquid crystal enclosing area 35 side. IC) The driving IC 8 is mounted in the mounting area 7. From the output terminals of the driving IC 8 (terminals located in the central area of the second terminal forming area 21) located in the central area in the longitudinal direction of the IC mounting area 7, the first substrate 10 When the second substrate 20 and the second substrate 20 are bonded to each other, the wiring is linearly routed toward the substrate side 202 until a portion corresponding to the first inter-substrate conduction terminal 60 overlaps, and a plurality of second An inter-substrate conduction terminal 70 is formed. (Second inter-substrate conduction terminal 70 and second electrode pattern 50 The connection between the linear part 501 and the driving IC is omitted. Also, the output terminals of the driving IC (terminals located on both sides of the second terminal formation area 21) arranged on both sides in the length direction of the semiconductor (IC) mounting area 7 When the substrate 10 and the second substrate 20 are bonded to each other, the straight line portion 501 and the oblique line portion 50 extend around the regions corresponding to both sides of the formation region of the first electrode pattern 40. A plurality of rows of second electrode patterns 50 for driving the liquid crystal are formed via the second electrode pattern 50, and these second electrode patterns 50 are connected to the first electrode patterns 4 in the liquid crystal sealing area 35. It extends to intersect zero.

In configuring the liquid crystal panel 1 using the first substrate 10 and the second substrate 20 configured as described above, the first substrate 10 and the second substrate 20 are combined in this embodiment. When bonding via the sealing material 30, a gap material and a conductive material are compounded in the sealing material 30, and the sealing material 30 is used as the first inter-substrate conduction terminal 60 and the second substrate. It is also formed in an area where the inter-terminal terminals 70 overlap. Therefore, when the sealing material 30 is melted and hardened while applying a force to narrow the gap in a state where the first substrate 10 and the second substrate 20 are overlapped, the conductive material becomes The first inter-substrate conduction terminal 60 and the second inter-substrate conduction terminal 70 are conducted in a state of being pressed or crushed between the first substrate 10 and the second substrate 20. .

As shown in FIG. 10, when the first substrate 10 and the second substrate 20 are bonded together via the sealing material 30, the first electrode pattern 40 and the second electrode pattern Pixels 5 are formed in a matrix at the intersection with 50. For this reason, after mounting the flexible substrate 90 to the end of the second terminal forming region 21 of the second substrate 20 on the substrate side 201 side using an anisotropic conductive material or the like, When a signal is input to the external input terminal 80 via the flexible substrate 90, a scanning signal can be applied to the second electrode pattern 50 from the driving IC 8, and the first substrate The first electrode pattern 40 formed on the substrate 10 is electrically connected to the second IC between the driving IC 8 and the second substrate. Image data can be input as a signal through the terminal 70, the conductive material, and the first inter-substrate conductive terminal 60. Therefore, the alignment state of the liquid crystal positioned between the first electrode pattern 40 and the second electrode pattern 50 in each pixel 5 can be controlled by the image data and the scanning signal. A predetermined image can be displayed.

As described above, in the related art, for the first electrode pattern 40 in the vertical direction, a signal is directly input from the external input terminal, and the signal is pulled to both sides so as to avoid the first electrode pattern 40. Regarding the rotated second electrode pattern 50 in the horizontal direction, a signal input via an obliquely extending inter-substrate conduction terminal is performed, but in the present embodiment, the first electrode pattern 40 is avoided. Regarding the second horizontal electrode pattern 50 that is routed to both sides, the signal is directly input from the driving IC 8, and when the signal is input by the inter-substrate conduction, the second inter-substrate conduction is performed. The first inter-substrate conduction terminal 60 and the second inter-substrate conduction terminal 70 can be formed straight. As described above, since the signal is input to the first electrode pattern 40 in the vertical direction by inter-substrate conduction via the second substrate 2, the pattern must be obliquely extended (the The pattern is inclined diagonally between the corner where the innermost pattern of the second electrode pattern 50 is bent near the display area and the corner of the outermost pattern of the second electrode pattern 50. It is not necessary to carry out inter-substrate conduction in the area where the formation is inevitable (the area width indicated by arrow A). Can be formed. For this reason, in the second electrode pattern 50, the linear portion 501 may be bent obliquely from the adjacent pattern with a small difference in the length dimension, and the second electrode pattern 50 The interval between the oblique portions 502 can be narrowed. Therefore, as can be seen from FIG. 9, the angle /? Formed by the line F connecting the boundary between the linear portion 501 and the oblique portion 502 in the second electrode pattern 50 with the substrate side 201 is small. For this reason, a large number of patterns can be formed even in such a region having a large layout constraint. Therefore, the number of patterns to be formed in such a region with a large layout constraint It is not necessary to reduce the distance between the first inter-substrate conduction terminal 60 and the second inter-substrate conduction terminal 70 even when the number of components increases. Further, it is not necessary to reduce the line width of the pattern. Therefore, according to the present embodiment, it is possible to increase the number of electrode patterns for driving the liquid crystal without deteriorating reliability or display quality. Conversely, if the number of patterns is equal, the portion of the second substrate 20 where the pattern must be obliquely extended can be narrower than before, so that the liquid crystal panel 1 having the same external dimensions can be used. To expand the display area. Furthermore, if the portion of the second substrate 20 which has to extend the pattern obliquely can be made smaller than before, the outer dimensions of the liquid crystal panel 1 having the same display area as the conventional one can be reduced. .

[Other embodiments]

In the first embodiment, both the first electrode pattern 40 and the second electrode pattern 50 are connected to an external input terminal 81 and an external drive IC provided outside the liquid crystal panel. In the second embodiment, both the first electrode pattern 40 and the second electrode pattern 50 are configured so that an image data or a scanning signal is supplied and applied via the second electrode pattern 82. However, the configuration is such that the image data and the scanning signal are applied from the driving IC 8 mounted on the second substrate, but the first electrode pattern receives the signal using the inter-substrate conduction. If it is a configuration, the first embodiment and the second embodiment may be combined. That is, the first electrode pattern 40 is applied with image data from a driving IC mounted on a glass substrate or a plastic substrate using inter-substrate conduction, while the other second electrode pattern 50 is applied to the other second electrode pattern 50. The configuration may be such that a scanning signal is applied from an external driving IC external to the liquid crystal panel.

Although the flexible board 90 is connected to the external input terminals 80, 81, and 82, other circuit boards are connected via a rubber connector or the like. You may.

Claims

2 1 Scope of request

1. The first inter-substrate conduction terminal disposed adjacent to a side of the substrate, and electrically connected to the first inter-substrate conduction terminal, the first inter-substrate conduction terminal A first substrate having a first electrode pattern disposed so as to extend toward a side opposite to an adjacent side, and

A first external input terminal arranged adjacent to a side of the substrate, a second inter-substrate conduction terminal electrically connected to the first external input terminal, and the first external input A second substrate having a second external input terminal disposed on both sides of the second external input terminal, and a second electrode pattern electrically connected to the second external input terminal. The first substrate and the second substrate are disposed so as to face each other such that the first electrode pattern and the second electrode pattern extend in a direction intersecting each other, and the first inter-substrate conductor is provided. A liquid crystal display device, wherein the common terminal and the second inter-substrate conduction terminal are electrically connected by a conduction material sandwiched between the first substrate and the second substrate. .

2. The liquid crystal display device according to claim 1,

The liquid crystal display device, wherein the first inter-substrate conduction terminal and the second inter-substrate conduction terminal are linearly arranged toward a side facing an adjacent side.

3. The liquid crystal display device according to claim 1,

A liquid crystal display device, wherein an image data is supplied to the first electrode pattern, and a scanning signal is supplied to the second electrode pattern.

4. The first inter-substrate conduction terminal disposed adjacent to the side of the substrate, and the first inter-substrate conduction terminal is electrically connected to the first inter-substrate conduction terminal. Adjacent A first substrate having a first electrode pattern arranged so as to extend toward a side opposite to the side opposite to the first side;

A second substrate having: an external input terminal disposed adjacent to a side of the substrate; a second inter-substrate conduction terminal; and a second electrode pattern. The second electrode patterns are arranged facing each other so as to extend in a direction intersecting with each other,

An input terminal is electrically connected to the external input terminal, and an output terminal is electrically connected to the second inter-substrate conduction terminal and the second electrode pattern. Drive IC

The first inter-substrate conduction terminal and the second inter-substrate conduction terminal are electrically connected by a conductive material sandwiched between the first substrate and the second substrate. A liquid crystal display device characterized by the above-mentioned.

5. The liquid crystal display device according to claim 4,

The liquid, wherein the first inter-substrate conduction terminal and the second inter-substrate conduction terminal are linearly arranged toward a side opposite to a side on which they are formed.

6. The liquid crystal display device according to claim 4,

A liquid crystal display device, wherein image data is supplied to the first electrode pattern, and a scanning signal is supplied to the second electrode pattern.