JP2002258308A - Liquid crystal devices and electronic equipment - Google Patents

Abstract

(57) [Problem] To provide a structure of a liquid crystal device capable of reducing a width of a peripheral region existing around a drive region by improving a wiring mode itself of a wiring pattern. SOLUTION: An A electrode group 121A and a C electrode group 121C.
Are electrically connected to extension wirings 122e and 123e belonging to the extension wiring pattern portions 122E and 123E, respectively. The extension wirings 122e and 123e extend linearly in the direction in which the second electrode extends, and are provided with terminations immediately after passing through the sealing material. Extension wirings 122e and 123e and sealing material 13
A plurality of second wirings 122 are located immediately below the intersection with zero.
b, 123b including second wiring patterns 122B, 123b
B is formed. Second wirings 122b and 123b
Is the extension wiring 122 due to the conductive anisotropy of the sealing material 130.
e and 123e.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a liquid crystal device and an electronic apparatus, and more particularly, to a structure of a wiring pattern for supplying a predetermined potential to an electrode for applying an electric field to a liquid crystal.

[0002]

2. Description of the Related Art In general, a liquid crystal device has a liquid crystal panel having a cell structure in which a pair of substrates made of glass, plastic, or the like are bonded together with a sealing material, and liquid crystal is sealed inside the sealing material. A flexible substrate, a TAB substrate, an IC chip, a reflector attached to a liquid crystal panel, a light source, a support frame, and the like.

For example, FIG. 10 shows a planar shape of a liquid crystal display panel 10 constituting a simple matrix type liquid crystal device.
The liquid crystal display panel 10 includes a substrate 11 and a substrate 12 bonded together with a sealant 13 to form a pair of substrates 11 and 1.
A plurality of electrodes 11 made of a transparent conductor or the like
The electrode patterns 11A and 12A including the first and second electrodes a and 12a are formed, and the electrodes 1a and 12a are opposed to each other with the liquid crystal interposed therebetween.
By applying a predetermined voltage between 1a and 12a,
The display is configured to make use of the electro-optic effect of the liquid crystal.

The area where the electrode patterns 11A and 12A face each other (the hatched area in the figure) is a drive area 10A in which pixels formed by the intersections of the electrodes 11 and 12 are arranged in a matrix in a matrix. The electrodes 11a, 12a in the electrode patterns 11A, 12A are formed integrally with the wirings 11b, 12b, 12c drawn out of the driving area 10A, respectively, and the wiring pattern 11 including these wirings is formed.
B, 12B, and 12C pass through the sealing material 13 outside the driving area 10A, and are led out onto the surface of the substrate overhang portion 11T.

[0005] Here, the wiring pattern 11B formed on the substrate 11 passes through the sealing material 13 as it is and is led out onto the above-mentioned substrate overhanging portion 11T, and its tip is connected to the input terminal 11A.
c. On the other hand, the wiring patterns 12B and 12C connected to the electrodes 12a on the substrate 12
It is conductively connected to input terminals 11d and 11e provided on terminal patterns 11D and 11E formed on the surface of T. Specifically, each of the wirings 12c and 12d of the wiring patterns 12B and 12C formed on the substrate 12 is provided with a sealing material 13 for each of the input terminals 11d and 11e of the terminal patterns 11D and 11E formed on the substrate 11. Are electrically conductively connected to each other or in a separately provided upper and lower conductive portion. In this case, the sealing material 13 for securing conduction between the substrates and the upper and lower conducting portions are, for example, those in which conductive particles are dispersed and mixed in a resin.
Can be used that have conductivity anisotropy that exhibits conductivity only in the thickness direction of the panel when pressed against each other.

Normally, when the liquid crystal panel 10 is incorporated in an electronic device or the like, the opening provided in the case body of the electronic device is wider than the driving region 10A and is larger than the inner region of the sealing material 13, that is, the liquid crystal sealing region. The liquid crystal panel 10 is also exposed in a narrow range. Outside the opening range (hereinafter, simply referred to as “exposed region 10B”), there are further provided wiring patterns 11C, 12B, 12C, terminal patterns 11D, 11E, a sealing material 13, a substrate overhang 11T, and the like.

[0007]

However, in the above-mentioned conventional liquid crystal device, the wiring patterns 11B, 12B, and 12C are routed around the driving area 10A as an actual display area capable of substantially displaying images. Since a large peripheral area is required, there is a problem that the entire apparatus becomes large for the actual display area. In particular, in the case of a liquid crystal device mounted on a portable electronic device such as a mobile phone or a portable information terminal, it is necessary to achieve both an increase in display area and a reduction in the size of the device. It is strongly required that the width of the peripheral region, particularly the width of the region further outside the exposed region 10B, be as small as possible.

Japanese Patent Application Laid-Open No. 57-101883 describes a structure in which a wiring connected to an electrode formed on one substrate is conductively connected to a wiring formed on the other substrate. In this structure, the peripheral region outside the drive region cannot be sufficiently narrowed. Therefore, by forming the wiring formed on the other substrate with a metal film, the area occupied by a wiring pattern including a plurality of the wirings is reduced. But,
In this method, a separate step is required to form a part of the wiring pattern with a metal film, which is disadvantageous in manufacturing cost and process control.

Further, Japanese Patent Application Laid-Open No. 59-9689 discloses that a segment electrode and a common electrode in a drive area are alternately formed on both of a pair of substrates, and are electrically connected to the segment electrodes on one of the substrates. A liquid crystal display element is described in which a wiring on one substrate and a wiring on the other substrate conductively connected to a segment electrode on the other substrate are formed in a substantially planar overlapping region. However, in this structure, it is necessary to transfer the common electrode on the other substrate in the driving region, and therefore, it cannot be used for a high-definition liquid crystal device.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to reduce the width of a peripheral region existing around a driving region by improving the layout of wiring patterns. It is an object of the present invention to provide a structure of a liquid crystal device that can be used.

[0011]

In order to solve the above-mentioned problems, a liquid crystal device according to the present invention is a liquid crystal device in which liquid crystal is arranged between a pair of substrates each having a plurality of electrodes. Has one or a plurality of first and second electrodes, respectively, wherein the first electrode is conductively connected to a first wiring formed on the one substrate, and the second electrode is connected to the other substrate It is characterized by being electrically conductively connected to the second wiring formed thereon.

According to the present invention, of the first electrode and the second electrode formed on one substrate, the first electrode is conductively connected to the first wiring formed on the one substrate, and the second electrode Is electrically conductively connected to the second wiring formed on the other substrate, so that the degree of freedom with respect to the routing of the wiring pattern is smaller than in the conventional case where all the wiring patterns are formed only on one substrate. Therefore, the wiring density of the wiring pattern can be increased and the area occupied by the wiring pattern can be reduced, and as a result, the width of the peripheral region outside the driving region can be reduced.

In the present invention, the first wiring and the second wiring
It is preferable that the wiring is formed at a position at least partially overlapping each other in a plane. According to this means, since the first wiring and the second wiring are formed at positions overlapping at least partially in a plane, the entire wiring pattern is occupied even if the wiring pattern is routed in substantially the same manner as the conventional structure. Occupied area can be reduced.

In the present invention, it is preferable that a voltage applied between the first wiring and the second wiring having a region overlapping in a plane is always lower than a pixel off voltage. Since the voltage applied between the first wiring and the second wiring is always equal to or less than the off-state voltage of the pixel, a part of the wiring pattern forming region is arranged in an exposed region exposed as a part of the display surface. Even if there is, the change in the visual recognition mode at the intersection of the first wiring and the second wiring can be made to such an extent that almost no change is observed.

In the present invention, it is preferable that the second electrode is conductively connected to the second wiring via an extension wiring formed on the one substrate. According to this means, since the extension wiring extended from the second electrode on the one substrate is conductively connected to the second wiring, a vertical conduction portion between the extension wiring and the second wiring depends on the form of the extension wiring. Can be set arbitrarily, and routing of the second wiring is facilitated. Further, for example, by providing the upper and lower conductive portions outside the exposed region, the appearance of the exposed region can be improved.

In the present invention, it is preferable that the second wiring and the extension wiring are conductively connected via a sealing material having conductive anisotropy. According to this means, since the second wiring and the extension wiring are conductively connected via the sealing material, the conductive connection can be made outside the exposed region, which may affect the appearance of the exposed region. In addition to the above, there is no need to separately provide upper and lower conducting portions, so that a more compact liquid crystal device can be configured.

In the present invention, it is preferable that the second wiring and the extension wiring are formed at least at positions where they overlap each other in a plane. According to this means, the second wiring and the extension wiring can be provided on substantially the same side (for example, both inside the sealing material) with respect to the upper and lower conductive portions, so that the area occupied by the wiring pattern can be further reduced. .

In the present invention, it is preferable that an applied voltage in a region where the second wiring and the extension wiring overlap in a plane is always equal to or lower than an off voltage of a pixel.

[0019] In the present invention, the number of scanning electrodes n, when the bias ratio expressed by a and b, respectively, that are configured to perform multiplex driving by the voltage averaging method under the condition that b 2 ^-1 becomes less n Is preferred. According to this means, there is a portion where the second electrodes or the first electrode and the second electrode cross each other in a plane, and even if this cross portion is arranged in the exposed area, the cross portion is always driven. Since only a voltage equal to or lower than the off state of the pixels in the region is applied, deterioration of the appearance of the exposed region can be prevented.

In the present invention, the first wiring is conductively connected to a first terminal formed on the other substrate, and the second wiring is conductively connected to a second terminal formed on the other substrate. Is preferred. According to this means, the first terminal and the second terminal are both provided on the other substrate, and the first wiring on the one substrate is connected to the first terminal on the other substrate via the vertical conductive portion, and the other substrate is connected to the first wiring. By electrically connecting the upper second wiring to the second terminal on the other substrate as it is, a power supply path extending from the first terminal to the first electrode via the first wiring, and a second wiring from the second terminal to the second wiring Since the power supply path that travels to the second electrode via the first and second electrodes passes through the upper and lower conducting portions once each, it is easy to maintain the reliability of the power supply path, and also to suppress a decrease in the yield of the manufacturing process. Can be.

As a specific configuration, the first terminal and the second terminal are provided on one substrate, as in the embodiment described later shown in FIG.
Terminals may be provided together, and the first wiring on one substrate may be conductively connected to the first terminal as it is, and the second wiring on the other substrate may be conductively connected to the second terminal via the upper and lower conductive portions. In this case, a potential is supplied to the second electrode via two upper and lower conducting portions. Note that, at this time, the third electrode formed on the other substrate may be connected to the one substrate via a vertical conduction portion.

In the present invention, one or more third electrodes may be formed on the other substrate, and the third electrode may be conductively connected to a third terminal formed on the other substrate. . In this case, it is preferable to form all the input terminals, that is, the first terminal, the second terminal, and the third terminal only on the other substrate in order to simplify the mounting process.

Next, an electronic apparatus according to the present invention includes the liquid crystal device according to any one of the above, and control means for controlling the liquid crystal device. Any electronic device may be used as long as it has a liquid crystal device.In particular, the use of the electronic device in a portable electronic device such as a mobile phone or a portable information terminal may increase the display area. This is effective in that it is compatible with miniaturization of the equipment.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of a liquid crystal device and an electronic apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

[First Embodiment] FIG. 1 is a schematic plan view showing a planar structure of a liquid crystal display panel 100 constituting a main part of the liquid crystal device of the first embodiment, and FIG. FIG. 2 is a schematic longitudinal sectional view schematically showing a state cut along line II-II of FIG.

As shown in FIG. 2, the liquid crystal display panel 100 is formed by laminating a substrate 110 made of glass, plastic, or the like with a sealing material 130 therebetween. 137 is enclosed. The sealing material 130 is obtained by dispersing and mixing spherical conductive particles 135, for example, those obtained by plating metal particles on the outer surfaces of resin particles, in a resin base material such as a thermosetting resin.

On the surface of the substrate 110, an electrode pattern 110A made of a transparent conductor such as ITO (indium tin oxide) is formed. In the electrode pattern 110A, a plurality of strip-shaped third electrodes 111 are arranged in parallel to form a stripe. An alignment film 116 made of a polyimide resin or the like is formed on the third electrode 111, and is subjected to a rubbing process in a predetermined direction.

On the surface of the substrate 120, an electrode pattern 120A made of a transparent conductor such as ITO is formed. A plurality of strip-shaped electrodes 12 are provided in the electrode pattern 120A.
1a, 121b, 121c, and 121d are formed, and an alignment film 116 similar to the above is formed on these electrodes. The spacer 136 is for regulating the substrate interval to a predetermined value (for example, 3 to 10 μm).

As shown in FIG. 1, the electrode pattern 110A
The third electrode 111 is connected to the third wiring 112,
The wiring 112 passes through the sealant 130 as it is, and is drawn out onto the surface of the substrate overhang 110T, in which the substrate 110 extends beyond the outer shape of the substrate 120, and constitutes the input terminal 113.

The electrode pattern 120A includes an A electrode group 121A including a plurality of second electrodes 121a, a B electrode group 121B including a plurality of first electrodes 121b, and a C electrode group including a plurality of second electrodes 121c. Group 121C and a plurality of first
A D electrode group 121D including an electrode 121d is provided. Each of the electrode groups and the first and second electrodes, which are constituent elements thereof, are indicated by different names for the sake of convenience in order to distinguish them according to the difference in the connection mode with the wiring pattern. Only a plurality of electrodes of the same shape are arranged in parallel.

The electrode patterns 110A and 120A face each other, and the plurality of third electrodes 111 intersect the plurality of first electrodes 121a, 121c and the second electrodes 121b, 121d, thereby forming a plurality of pixels. Are provided in a drive area 100A (shown by oblique lines) arranged in a matrix. Each pixel is independently driven in the driving area 100A, so that a predetermined display state can be formed.

The second electrode 121a and the first electrode 121b belonging to the A electrode group 121A and the B electrode group 121B are connected to a wiring pattern arranged on the left side of the driving area 100A in the figure, and the C electrode group 121C and the D electrode group Each of the second electrode 121c and the first electrode 121d belonging to 121D is connected to a wiring pattern arranged on the right side of the driving area 100A in the drawing.

The second electrodes 121a and 121c belonging to the A electrode group 121A and the C electrode group 121C are connected to the extension wiring 1 belonging to the extension wiring pattern parts 122E and 123E, respectively.
It is conductively connected to 22e and 123e. These extension wirings 122e and 123e extend linearly in the extension direction of the second electrode, and are provided with terminations immediately after passing through the sealing material 130.

Immediately below the intersection between the extension wirings 122e and 123e and the sealing material 130, second wiring patterns 122B and 123B including a plurality of second wirings 122b and 123b are formed on the surface of the substrate 110. . The second wirings 122b and 123b are conductively connected to the extension wirings 122e and 123e one-to-one in the regions CC12 and CC14 due to the conductive anisotropy of the sealing material 130. Second wiring patterns 122B and 123B
Extends toward the substrate overhang 110T, and the substrate overhang 110
After passing through the portion of the sealing material 130 facing the T, the substrate 12
0 at the outer edge.

The terminal patterns 110D and 110E formed on the substrate overhang 110T are provided at the terminal ends of the second wiring patterns 122B and 123B so as to be continuous, and these terminal patterns 110D and 110E are provided.
Has a plurality of input terminals 110d and 110e formed in parallel. Each of the second wirings 122b and 123b is conductively connected one-to-one to approximately half of the plurality of input terminals 110d and 110e on the third wiring pattern 110B side.

Next, the first electrodes 121b and 121d belonging to the B electrode group 121B and the D electrode group 121D are connected to the first wiring patterns 122A and 122A formed on the substrate 120.
Each of the first wirings 122a and 123a belonging to 3A is conductively connected. First wiring patterns 122A, 123
A denotes the substrate overhang 11 from the left and right ends of the drive area 100A.
The end is provided after extending toward 0T and passing through the portion of the seal material 130 facing the substrate overhang 110T.

The terminal patterns 110D and 110E are formed immediately below the first wiring patterns 122A and 123A with the sealing material 130 interposed therebetween.
Due to the conductive anisotropy of 0, in the regions CC13 and CC15, each of the first wirings 122a and 123a is connected to about half of the plurality of input terminals on the side opposite to the third wiring pattern 110B among the input terminals 110d and 110e. On the other hand, they are electrically connected one to one.

In the first embodiment, the substrate 120
The A electrode group 121A and the C electrode group 1 of the electrode patterns 120A formed on the inner surface of the substrate (the front substrate in FIG. 1).
The second electrodes 121a and 121c belonging to 21C are formed on the inner surface of the substrate 110 (the substrate on the far side in FIG. 1) via the extension wirings 122e and 123e.
b and the first electrode 1 belonging to the B electrode group 121B and the D electrode group 121D of the electrode pattern 120A.
21b and 121d are the first wirings 1 on the substrate 120 as they are.
22a and 123a are conductively connected. The second wiring patterns 122B and 123B on the substrate 110 and the first wiring patterns 122A and 123A on the substrate 120 partially overlap each other in a plane.

Therefore, the wiring pattern drawn from the electrode pattern 120A is dispersed on the pair of substrates 110 and 120 so that the wiring patterns partially overlap each other, so that the width of the peripheral region outside the driving region 100A is reduced. Can be reduced. Here, the peripheral area is the driving area 1
This is a region from the boundary line of 00A to the outer edge of the substrate. FIG.
The width of the peripheral region can be reduced to almost half as compared with the conventional structure shown in FIG.

The second wiring 122b on the substrate 110,
123b passes through the sealing material 130 as it is and is connected to the terminal patterns 110D and 110E.
The first wirings 122a and 123a extending upward as they are are connected to terminal patterns 110D and 110E formed on the substrate overhang 110T by using the portion of the sealing material 130 adjacent to the substrate overhang 110T as a vertical conductive portion. I have. Therefore, the first electrodes 121a and 121c and the second electrode 121
b, 121d, the input terminals 110d,
Since the wiring pattern is formed such that a predetermined potential is supplied once from the upper and lower conductive portions formed by the sealing material 130 from the terminal 110e, the reliability of the conductive connecting portion can be improved and the manufacturing process can be improved. It is possible to improve the yield.

[Second Embodiment] Next, a second embodiment according to the present invention will be described.
An embodiment will be described with reference to FIG. About this 2nd embodiment, except the name of an individual electrode and wiring,
Since the basic structure is common to that of the first embodiment, the same reference numerals are given to portions corresponding to the first embodiment, and description thereof will be omitted.

In the second embodiment, the A wiring group 12
The second electrodes 121a belonging to the 1A and C wiring groups 121C,
121c is connected to the extension wirings 122e and 123e belonging to the extension wiring patterns 122E and 123E, and the extension wirings 122e and 123e are connected to the area C via the sealing material 130.
In C12 and CC14, the second wiring pattern 122B,
While being connected to the second wirings 122b and 123b belonging to 123B, the first electrodes 121b and 121d belonging to the B electrode group 121B and the D electrode group 121D are directly connected to the first wirings 122a and 122a belonging to the first wiring patterns 122A and 123A.
The point that is conductively connected to 123a, and the second wiring patterns 122B and 123B are directly connected to the terminal pattern 110D,
110E and the first wiring patterns 122A and 122A.
3A is in the region CC16, CC17 via the sealing material 130.
Are connected to the terminal patterns 110D and 110E in the same manner as in the first embodiment.

However, in the second embodiment, the second wiring patterns 122B and 123B are formed of the third wiring pattern 110 out of the terminal patterns 110D and 110E.
B. A plurality of input terminals 110 formed on the half opposite to B
d, 110e, and the first wiring pattern 122A,
123A is opposite to the first embodiment in that it is connected to a plurality of input terminals 110d and 110e formed in half of the terminal patterns 110D and 110E on the third wiring pattern 110B side. I have.

With this configuration,
In the second embodiment, the A electrode groups 121A and C
Terminal patterns 110D and 110E rather than electrode group 121C
B electrode groups 121B and 1 formed closer to the side
The first wiring pattern 122A, 1 drawn out of 21D
23A can be formed longer than in the first embodiment, and conversely, the second wiring patterns 122B and 123B belonging to the A electrode group 121A and the C electrode group 121C can be formed shorter than in the first embodiment. Since it is possible to reduce the variation range of the wiring length between both wiring patterns, it is possible to more easily reduce the variation of the potential supplied to each electrode in the electrode pattern 120A than in the first embodiment. Will be possible. For example, when trying to absorb variations due to the wiring length by changing the wiring width,
In the second embodiment, variations in the wiring width can be reduced as compared with the first embodiment.

[Explanation of Detailed Structure] Next, a detailed structure which can be commonly applied to the first and second embodiments will be described. In each of the above embodiments, FIG. 5 shows a state in which the vicinity of the vertical conductive portion (the seal member 130) between the extension wiring pattern 123E and the second wiring pattern 123B is viewed from the substrate 110 side.

Here, the extension wiring pattern 123E drawn out from the C electrode group 121C passes through the sealing material 130, and the second wiring pattern 123B is formed by the sealing material 130 which is a vertical conductive portion with the extension wiring pattern 123. In the vicinity, each extension wiring 123 of the extension wiring pattern 123E is provided.
The second wiring 123b is formed so as to completely overlap with the plane e. After that, the second wiring 123b is
It is formed so as to bend substantially at a right angle at a position distant to some extent from the corresponding extension wiring 123e and extend toward the above-mentioned terminal pattern.

Between the extension wiring pattern 123E and the second wiring pattern 123B formed as described above, the intersection BE (the square portion, (Shown by oblique lines). Extension wiring 123e and second wiring 123 corresponding to each other
Since b and the supply potential are always the same, even if they intersect across the liquid crystal, almost no voltage is applied to the interposed liquid crystal. On the other hand, at intersections between the extension wiring and the second wiring that do not correspond to each other, a predetermined voltage is applied to the liquid crystal by supplying different potentials to both sides of the liquid crystal. If this voltage is higher than the threshold voltage of the liquid crystal, the liquid crystal molecules leave the initial alignment state by the voltage and shift to a different alignment state, and thus have the same appearance as the on-state pixels arranged in the driving region 100A. Changes. Such a change in appearance is caused by the driving area 1
If it occurs outside 00A and inside exposed area 100B, the appearance of the display surface will be significantly impaired.

FIG. 6 shows a modification of the same part as the detailed structure shown in FIG. In this modification, each second wiring 123 of the second wiring pattern 123B
b is displaced from the position immediately above the corresponding extension wiring 123e in the vicinity of the upper and lower conductive portion and proceeds substantially in parallel with the extension wiring pattern 123E as it is. And extends toward the terminal pattern. In this pattern structure, an ordinary square intersection BE
In addition to the above, although an L-shaped or rectangular intersection portion BE ′ exists depending on the amount of displacement between the second wiring pattern and the extension pattern, the display is basically performed by applying a voltage to the intersection portion in the same manner as described above. The appearance of the surface may be impaired.

Although not shown, similar to the intersections BE and BE 'generated in the overlapping area between the extended wiring pattern and the second wiring pattern, the overlapping area between the first wiring pattern and the second wiring pattern is similar to the above. Also, a similar intersection may be formed, and a voltage may be applied in the same manner as described above to change the display mode.

Note that, unlike the above-described wiring pattern, a second wiring extending obliquely with respect to the extension wiring 123e may be formed as shown by a two-dot chain line in FIG. In this case, the cross section has a different planar shape (for example, a parallelogram).
However, the situation is exactly the same as the above case.

Third Embodiment Next, a liquid crystal device according to a third embodiment of the present invention will be described with reference to FIG.
The liquid crystal display panel 300 in this embodiment includes a substrate 3
The substrate 10 and the substrate 320 are bonded together with a sealant 330, and the substrate 320 is provided with a substrate overhang portion 320 </ b> T that extends outside the outer shape of the substrate 310.

The substrate 310 has an electrode pattern 310A including a plurality of third electrodes 311 and a third wiring pattern 31 including a plurality of third wirings 312 connected to the third electrodes 311.
0B, and a plurality of second wires 322b, 3
Second wiring patterns 322B and 323B including 23b are formed.

On the other hand, the substrate 320 has an A electrode group 321A
A plurality of second electrodes 321a, a plurality of first electrodes 321b of the B electrode group 321B, a plurality of second electrodes 321c of the C electrode group 321C, and a plurality of first electrodes 321d of the D electrode group 321D.
Electrode pattern 320A including the second electrode 321a,
An extension wiring pattern 322E including extension wirings 322e and 323e extending from 21c to the outside of the driving region 300A.
323E and a first wiring pattern 3 including first wirings 322a and 323a connected to the first electrodes 321b and 321d.
22A and 323A are formed.

The third wiring pattern 310B formed on the substrate 310 is connected to the input terminal 320c of the terminal pattern 320C formed on the substrate extension 320T of the substrate 320 in the region CC31 due to the conductive anisotropy of the sealing material 330.
Are electrically conductively connected. Also, the second wiring pattern 322
B and 323B are formed in the areas CC33 and CC33 by the sealing material 330.
The input terminals 320d, 3 of the terminal patterns 320D, 320E formed on the substrate overhang 320T in the CC35.
20e is conductively connected.

The extension wiring patterns 322E and 323E formed on the substrate 320 are conductively connected to the second wiring patterns 322B and 323B on the substrate 310 in the areas CC32 and CC34 by the sealing material 330 as in the above embodiments. I have. Also, the first wiring patterns 322A and 322A, 3
23A are terminal patterns 320D, 3D formed on the substrate overhang 320T by passing under the sealing material 330 as they are.
20E are connected to input terminals 320d and 320e.

In this embodiment, the second electrodes 32 belonging to the A electrode group 321A and the C electrode group 321C on the substrate 320
1a and 321b are extended wiring patterns 322E and 323E.
Through the second wiring patterns 322B and 322B on the substrate 310.
23B, and the second wiring patterns 322B, 3
23B is configured to be connected again to the terminal patterns 320D and 3230E formed on the substrate overhang 320T of the substrate 320. That is, the second electrode 321a,
321c temporarily moves onto the substrate 310 from the input terminals 320d and 320e of the terminal patterns 320D and 320E via the vertical conductive portions of the regions CC33 and CC35, and then returns to the substrate 3 again via the vertical conductive portions of the regions CC32 and CC34.
A predetermined potential is supplied by a power supply path returning to above 20 and passing through two upper and lower conducting portions.

[Driving Method] As described above, the extension wiring pattern and the second wiring pattern, and the first wiring pattern and the second wiring pattern
If there is an overlapping area with the wiring pattern, the non-corresponding wirings face each other via the liquid crystal, and
Since there is a possibility that the display mode changes like E and BE ', in the above embodiments, the display mode of the intersections BE and BE' is prevented from changing as follows.

Next, the liquid crystal display panel of each of the above embodiments and the liquid crystal drive circuit were connected via a flexible substrate, a TAB substrate, or the like, or the liquid crystal drive circuit was formed on the overhanging portion of the liquid crystal display panel. The IC chip was mounted (in the case of the COG method), driven by the multiplex driving method (simple time division driving method), and the potential was supplied by the voltage averaging method. Here, one of the first and second electrodes and the third electrode is a scanning electrode (common electrode),
The other can be used as a signal electrode (segment electrode) to supply potential. Specifically, the first electrode and the second electrode are scanning electrodes (common electrodes), and the third electrode is a signal electrode (segment electrode). ).

Here, the number of scanning electrodes is n and the bias ratio is b.
Then, the effective voltage of the pixel in the on state (lighting state) is as follows: Von = {(b ² + n−1) / (b ² · n)} ^1/2 · V0 (1) The effective voltage of the pixel in the lighting state is as follows: Voff = [{(b−2) ² + n−1} / (b ² · n)] ^1/2 · V0 (2) The effective voltage at the intersection, which corresponds to the potential difference between the two, is as follows: Vbe = [{2 (b-1) ² } / (b ² · n)] ^1/2 · V0 (3)

Therefore, the reason why the effective voltage Vbe at the intersection is equal to the effective voltage Voff of the pixel in the off state is n
= B ² -1 and the effective voltage V at the intersection
In order to make be equal to or lower than the effective voltage Voff of the pixel in the OFF state, b ² −1 may be set to n or lower. In this case, the voltage applied to the intersection of the wiring patterns is always equal to or lower than the voltage applied to the pixel in the off state, and the driving region 1
The appearance in the peripheral area around 00A is less likely to be impaired.

In particular, the ratio (b ² -1) / n between the effective voltage at the intersection and the effective voltage of the pixel in the off state is set to 0.8.
The following is preferable in order to further improve the appearance of the peripheral region. Conditions that should be applied to actual products include:
(B ² -1) / n is desirably 0.7 or less.

For example, when the number of scanning electrodes n = 64 and the bias ratio is set to 6.7, (b ² -1) / n becomes about 0.3.
686. In this case, when the driving voltage V0 of the voltage averaging method is changed, the light of each of the ON-state pixel (A), the OFF-state pixel (B), and the intersection BE (C) in the driving region 100A is changed. FIG. 7 shows a graph (a) showing a change in transmittance and a graph (b) showing a contrast ratio (B / A) when the drive voltage V0 is changed.
Here, an STN-type liquid crystal display panel was used as the liquid crystal panel, and the driving voltage V0 was changed at a frame frequency of 85 Hz. In this panel, a high contrast is obtained when the drive voltage is in the range of 8 to 9V. Further, by using the drive voltage within this range, the curve C in the graph (a) can be obtained.
As shown in (2), a higher light transmittance (in the case of a normally white display panel) is always obtained at the intersection than the pixel in the OFF state, and there is almost no adverse effect on the display mode.

[Electronic Apparatus] Next, an embodiment in which a liquid crystal device including the above liquid crystal panel is used as a display device of an electronic apparatus will be described. FIG. 8 is a schematic configuration diagram illustrating the overall configuration of the present embodiment. The electronic device shown here includes a display information output source 210, a display processing circuit 211, a power supply circuit 212, a timing generator 213, and the same liquid crystal panel 100 as described above. In addition, the liquid crystal panel 1
00 includes a display panel body 150 having a cell structure in which the above-described liquid crystal is sealed, and a drive circuit 160 including the above-described IC chip and the like.

The display information output source 210 has a ROM (Read O
a timing generator 2 comprising a memory such as an nly memory or a random access memory (RAM), a storage unit such as a magnetic recording disk or an optical recording disk, and a tuning circuit for synchronizing and outputting a digital image signal.
The display information is supplied to the display information processing circuit 211 in the form of an image signal of a predetermined format or the like based on various clock signals generated by the control unit 13.

The display information processing circuit 211 includes various known circuits such as a serial-parallel conversion circuit, an amplification / inversion circuit, a rotation circuit, a gamma correction circuit, and a clamp circuit, and executes processing of input display information. The image information is supplied to the drive circuit 160 together with the clock signal CLK. The driving circuit 160 includes a scanning line driving circuit, a signal line driving circuit, and an inspection circuit. The power supply circuit 212 supplies a predetermined voltage to each of the above-described components.

FIG. 9 shows a mobile phone as an embodiment of the electronic apparatus according to the present invention. In this mobile phone 1000, a circuit board 1001 is arranged inside a case body 1010,
The liquid crystal panel 100 described above is
Has been implemented. Operation buttons 1020 are arranged on the front surface of the case body 1010, and the antenna 10
30 is mounted so as to be able to come and go. A speaker is arranged inside the receiver 1040, and a microphone is built inside the transmitter 1050.

The liquid crystal panel 100 installed in the case body 1010 is configured so that the display surface (the above-described exposed area 100B) can be visually recognized through the display window 1060.

It should be noted that the liquid crystal device and the electronic apparatus of the present invention are not limited to the above-described illustrated examples, and it goes without saying that various changes can be made without departing from the spirit of the present invention. For example, the liquid crystal panel 100 shown in FIGS. 1 and 2 has a simple matrix structure,
The present invention can be applied to an active matrix type liquid crystal device.

The liquid crystal panel has been described as a one-screen driving simple matrix type in which a first electrode and a second electrode which are orthogonal to each other extend in a strip shape over the entire driving area. The present invention can also be applied to a liquid crystal display panel having a plurality of screens (driving regions) such as a two-screen driving simple matrix type in which one of the electrode and the second electrode is divided in the middle of the extension direction. Here, since a plurality of sets of drive regions corresponding to a plurality of screens are provided in the panel, the same wirings and terminal portions as described above are formed for each of these drive regions. In this case, the present invention can be applied to the structure and arrangement of these wirings and terminals.

Further, the liquid crystal panel 100 is configured to connect a flexible wiring substrate or a TAB substrate, but is a liquid crystal panel having a so-called COG type structure in which an IC chip is directly mounted. No problem.

[0071]

As described above, according to the present invention,
Compared to the conventional case where all the wiring patterns are formed only on one substrate, the degree of freedom for the wiring pattern can be increased, so that the wiring density of the wiring pattern can be increased or the area occupied by the wiring pattern can be increased. Can be reduced, and as a result, the width of the peripheral region outside the driving region can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing a planar structure of a liquid crystal display panel in a first embodiment of a liquid crystal device according to the present invention.

FIG. 2 is a schematic longitudinal sectional view of the liquid crystal display panel of the first embodiment.

FIG. 3 is a schematic plan view showing a planar structure of a liquid crystal display panel in a liquid crystal device according to a second embodiment of the present invention.

FIG. 4 is a schematic plan view showing a planar structure of a liquid crystal display panel in a third embodiment of the liquid crystal device according to the present invention.

FIG. 5 is an enlarged plan view showing a detailed structure of each embodiment.

FIG. 6 is an enlarged plan view showing a modification of FIG.

FIG. 7 is a graph (a) showing a light transmittance dependency on a drive voltage of a pixel in an ON state, a pixel in an OFF state, and a crossing portion of a wiring pattern in the liquid crystal device according to each of the embodiments, and a contrast ratio dependency on the drive voltage. It is a graph (b) which shows sex.

FIG. 8 is a configuration block diagram illustrating a schematic configuration of a display system when the liquid crystal device is incorporated in an electric device.

FIG. 9 is a schematic perspective view illustrating an appearance of a mobile phone as an example of an electronic apparatus.

FIG. 10 is a schematic plan view showing a planar structure of a conventional liquid crystal display panel.

[Explanation of symbols]

100, 300 Liquid crystal display panel 100A, 300A Drive area 100B, 300B Exposed area 110, 120, 310, 320 Substrate 110A, 120A, 310A, 320A Electrode pattern 110B, 310B Third wiring pattern 110T, 320T Substrate overhang 110D, 110E , 320C, 320D, 320E
Terminal pattern 110d, 110e, 320c, 320d, 320e
Input terminals 111, 311 Third electrodes 112, 312 Third wiring 113 Input terminals 121A, 321A A electrode group 121B, 321B B electrode group 121C, 321C C electrode group 121D, 321D D electrode group 122a, 123a, 322a, 323a First Wiring 122b, 123b, 322b, 323b Second Wiring 122e, 123e, 322e, 323e Extension Wiring 122A, 123A, 322A, 323A First Wiring Pattern 122B, 123B, 322B, 323B Second Wiring Pattern 122E, 123E, 322E, 323E Extension Wiring pattern

Claims (11)

[Claims] 1. A liquid crystal device in which liquid crystal is arranged between a pair of substrates each having a plurality of electrodes, wherein one or a plurality of first and second electrodes are formed on one of the substrates. Wherein the first electrode is conductively connected to a first wiring formed on the one substrate, and the second electrode is conductively connected to a second wiring formed on the other substrate. Liquid crystal device. 2. The liquid crystal device according to claim 1, wherein the first wiring and the second wiring are formed at positions at least partially overlapping each other in a plane. 3. The pixel according to claim 1, wherein a voltage applied between the first wiring and the second wiring having a region overlapping in a plane is always equal to or lower than a pixel off-voltage. Item 3. The liquid crystal device according to item 2. 4. The liquid crystal according to claim 1, wherein the second electrode is conductively connected to the second wiring via an extension wiring formed on the one substrate. apparatus. 5. The liquid crystal device according to claim 4, wherein the second wiring and the extension wiring are conductively connected via a sealing material having conductive anisotropy. 6. The liquid crystal device according to claim 4, wherein the second wiring and the extension wiring are formed at positions at least partially overlapping each other in a plane. 7. The liquid crystal according to claim 6, wherein an applied voltage in a region where the second wiring and the extension wiring overlap in a plane is always equal to or lower than an off voltage of a pixel. apparatus. 8. A multiplex drive by a voltage averaging method under the condition that b ² -1 is n or less, where n is the number of scan electrodes and b is a bias ratio. The liquid crystal device according to any one of claims 1, 2 or 4 to 6. 9. The first wiring is conductively connected to a first terminal formed on the other substrate, and the second wiring is conductively connected to a second terminal formed on the other substrate. The liquid crystal device according to claim 1, wherein: 10. The one or more third substrates are provided on the other substrate.
The liquid crystal device according to claim 9, wherein an electrode is formed, and the third electrode is conductively connected to a third terminal formed on the other substrate. 11. The method according to claim 1, wherein
13. An electronic apparatus comprising: the liquid crystal device according to claim 1; and control means for controlling the liquid crystal device.