JP2001077484A - Flexible wiring board, electro-optical device, method for manufacturing the same, and electronic device - Google Patents

Abstract

(57) Abstract: An electro-optical device in which an area ratio of a display region of an electro-optical device is enlarged, a method of manufacturing the same, a flexible wiring board suitable for the electro-optical device, and an electronic device including the electro-optical device. Provide equipment. SOLUTION: A flexible wiring board 23 branches from a board main body 234 and the board main body 234, and the board main body 234 is provided.
And a branch wiring portion 235 provided so as to extend in the surface direction of the surface. The flexible wiring board 23
First output terminal area 23 provided on substrate body 234
4A, a second output terminal area 235A provided with the branch wiring portion 235 and formed on the same side as the first output terminal area 234A, and an input terminal area 236A.
including. By bending the branch wiring portion 235 at a predetermined position, the second output-side terminal region 235A is inverted,
The arrangement direction of the wiring in the output side terminal area 235A is the same as the arrangement direction of the wiring in the first output side terminal area 234A. The electro-optical device includes a flexible wiring board 23. The electronic device includes an electro-optical device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an electro-optical device such as a liquid crystal display device and an EL (electroluminescence) display device, a flexible wiring board suitable for these electro-optical devices, and a method of manufacturing an electro-optical device. Further, the present invention relates to an electronic apparatus including the electro-optical device.

[0002]

2. Description of the Related Art In recent years, display devices have been widely used as information display terminals for portable devices, homes, offices / factories, automobiles, and the like. In particular, the liquid crystal display device has features such as thinness, light weight, low voltage, and low power consumption. For example, a liquid crystal display device is a main component of an electronic display, and its application to a PDA (personal portable information terminal) or the like has been increasingly active by utilizing low power consumption.

As a conventional liquid crystal display device, there is, for example, a liquid crystal display device 1 of a passive matrix drive system as shown in FIG. The liquid crystal display device 1 has a liquid crystal display panel 2 and a printed circuit board 3. The liquid crystal display panel 2 and the printed circuit board 3 are electrically connected via first and second flexible wiring boards 4 and 5.

[0004] The liquid crystal display panel 2 has a pair of glass substrates 6 and 7 arranged opposite to each other. Between these glass substrates 6 and 7, a sealing material (not shown) interposed so as to go around the display area is arranged. A liquid crystal is sealed in a gap formed between the glass substrates 6 and 7 and a sealing material. On the surface of the glass substrate 6 that faces the glass substrate 7 (the surface facing the glass substrate 6), a plurality of signal electrodes 8 are formed so as to be parallel. On the other hand, a plurality of scanning electrodes 9 are formed on the surface of the glass substrate 7 facing the glass substrate 6 (the surface facing the glass substrate 7) along a direction orthogonal to the signal electrodes 8.

A predetermined side edge of the liquid crystal display panel 2 (FIG. 10)
At the lower edge), the edge of the glass substrate 6 is set to protrude laterally (downward in the figure) from the edge of the glass substrate 7, and this projection (the glass substrate 6 is 7 does not overlap) constitutes the wiring junction region 6A. Further, at a side edge portion (left side edge portion in the figure) adjacent to the above-described side edge portion of the liquid crystal display panel 2, the edge portion of the other glass substrate 7 is located laterally from the edge portion of the one glass substrate 6 (see FIG. (The left side in the figure) and is set to project to
Construct A. Then, signal driver ICs 10 and 11 are provided in the wiring bonding area 6A on the glass substrate 6 side with COG (Ch).
ip On Glass) has been implemented. These signal driver ICs 10 and 11 are connected to an output terminal portion 8A in which a plurality of signal electrodes 8 extend and an input terminal portion 12 arranged on the edge side of the wiring junction region 6A. In addition, a scanning driver IC 13 is provided in the wiring bonding area 7A of the glass substrate 7.
Are implemented by COG. This scanning driver IC 13
Comprises an output terminal 9A having a plurality of scanning electrodes 9 extended therethrough;
Input terminal portion 14 arranged on the edge side of wiring joint region 7A
And connected to.

The output side terminal portion 4 A of the first flexible wiring board 4 is connected to the wiring bonding area 6 of the glass substrate 6.
It is joined via an anisotropic conductive film (ACF) so as to be electrically connected to the plurality of input terminal portions 12 arranged along the long side of A. Similarly, the output-side terminal portion 5A of the second flexible wiring board 5 is electrically connected to the plurality of input terminal portions 14 arranged along the long side of the wiring bonding region 7A of the glass substrate 7. They are joined via an anisotropic conductive film so as to be connected. The input-side terminal portion 4B of the first flexible wiring board 4 is joined to the output terminal section 15 formed on the printed circuit board 3 via an anisotropic conductive film or a connector. The input terminal portion 5B of the second flexible wiring board 5 is
It is joined to an output terminal portion 16 formed on the printed circuit board 3 via an anisotropic conductive film or a connector. The printed circuit board 3 is provided with predetermined wiring and various electronic components for controlling and driving the liquid crystal display panel 2.

As an electronic apparatus using the liquid crystal display device having the above-described configuration, there is an electronic apparatus having an input unit such as a keyboard and a numeric keypad, and displaying data on a liquid crystal display panel in accordance with an input operation to the input unit. . In such an electronic device, a liquid crystal display panel and a printed circuit board are incorporated in a chassis (panel storage frame). At this time,
Two flexible wiring boards are bent so that the printed board is arranged on the rear side of the liquid crystal display panel.

However, the above-described liquid crystal display device 1 has the following three problems.

(1) First Problem In the liquid crystal display device 1 described above, the signal driver IC 10
Flexible wiring board 4 connected to wiring joint area 6A of one glass substrate 6 on which the substrates 11 and 11 are mounted
And the second flexible wiring substrate 5 connected to the wiring bonding area 7A of the other glass substrate 7 on which the scanning driver IC 13 is mounted, must be connected to the printed circuit board 3 independently. For this reason, there is a problem that the module process is complicated and lacks convenience.

(2) Second Problem Since the respective flexible wiring boards 4 and 5 are separately connected to the printed circuit board 3, it is desirable that the output terminal sections 15 and 16 arranged on the printed circuit board 3 be close to each other. Absent. That is, when the flexible wiring boards 4 and 5 are joined to the printed board 3 using the mounting machine, it is necessary to secure a distance that does not cause interference between the flexible wiring boards. As described above, using a plurality of flexible wiring boards, for example, two,
This is a factor that hinders the miniaturization of the device.

(3) Third Problem In the liquid crystal display device 1 having the above-described configuration, the width x1 for mounting the scanning driver IC 13 in the wiring bonding area 7A of the glass substrate 7 and the output of the flexible wiring substrate 5 Predetermined bonding margin x2 for bonding side terminal portions 5A
And a dimension x3 for separating the scanning driver IC 13 and the output-side terminal portion 5A of the flexible wiring board 5 from each other.
Need to secure. For this reason, as the width dimension of the liquid crystal display panel 2 becomes shorter, the area ratio of the display area to the entire surface of the liquid crystal display panel 2 becomes smaller. Therefore, there is a demand for reducing the wiring area of the liquid crystal display panel to maximize the display area of a housing such as a chassis that accommodates the display device.

As a technique for solving the problem when two flexible wiring boards are used, for example, Japanese Patent Publication No.
The technique disclosed in Japanese Patent Application Laid-Open No. 2-289815 (hereinafter referred to as “prior art”) can be given. Hereinafter, this conventional technique will be described.

FIG. 11 is a structural view of a liquid crystal display device according to the prior art.

The liquid crystal display device 500 includes a liquid crystal display panel 5
10 and a flexible circuit board 530.
The flexible circuit board 530 includes a liquid crystal display panel 510.
Is joined to. The flexible circuit board 530 includes 1
It is folded and joined to the liquid crystal display panel 510. The flexible circuit board 530 specifically has the following configuration.

FIG. 12 is an expanded view of the flexible circuit board 530. The flexible circuit board 530 has a substantially rectangular shape, and has a common output terminal 540 and a segment output terminal 550 formed thereon. Common output terminal 5
40 is formed on the side of one end. The segment output terminal 550 is formed on the side of the other end. Then, the flexible circuit board 530 is made of AA ′
It is joined to the liquid crystal display panel 510 by bending at the portion. With the flexible circuit board 530 joined to the liquid crystal display panel 510, the arrangement direction of the wiring of the common output terminals 540 and the arrangement direction of the wiring of the segment output terminals 550 have a vertical relationship to each other.

Since this flexible wiring board 530 is composed of one board, the flexible wiring board 530 has a structure as shown in FIG.
Problems when using a plurality of flexible wiring boards 530,
Specifically, the above-described first problem and second problem can be solved.

However, in the prior art, both the common output terminal 540 and the segment output terminal 550 of the flexible circuit board 530 are joined to the long sides of the joining regions 514 and 515 of the liquid crystal display panel. For this reason,
The third problem (the problem in the case of joining at long sides) has not been solved yet.

[0018]

SUMMARY OF THE INVENTION An object of the present invention is to provide an electro-optical device in which the area ratio of a display area of the electro-optical device is enlarged, a method of manufacturing the same, a flexible wiring board suitable for the electro-optical device, and It is to provide an electronic device including an electro-optical device.

[0019]

Means for Solving the Problems A flexible wiring board of the present invention is provided with a substrate main body, a branch from the substrate main body, and extending in a surface direction of the substrate main body. A branch wiring portion, a first output terminal region provided on the substrate main body, and a second output terminal region provided on the branch wiring portion and formed on the same side as the first output terminal region. An output-side terminal region and an input-side terminal region, wherein at least a surface on which the second output-side terminal region is formed is inverted by bending the branch wiring portion at a predetermined position; The arrangement direction of the wiring in the side terminal area is the same as the arrangement direction of the wiring in the first output side terminal area.

This flexible wiring board can provide, for example, the following operational effects. According to this flexible wiring board, the surface on which the second output terminal region is formed is inverted by bending the branch wiring portion. Then, after the branch wiring portion is bent, the arrangement direction of the wires in the second output terminal region is the same as the arrangement direction of the wires in the first output terminal region. For this reason, when this flexible wiring board is applied to, for example, an electro-optical device having two substrates facing each other,
The branch wiring portion can be joined to the short sides of the non-overlapping regions on one substrate. That is, a joining margin becomes unnecessary. Therefore, this flexible wiring board
This can contribute to an increase in the area ratio of the display region of the electro-optical device.

The flexible wiring board of the present invention is suitably applied to an electro-optical device. The electro-optical device includes, for example, a first substrate and a second substrate opposed to each other, and a first wiring bonding region is formed in a region of the first substrate that does not overlap with the second substrate. An electro-optical device in which a second wiring bonding region is formed in a region of the second substrate which is formed and does not overlap with the first substrate. A flexible wiring substrate applied to such an electro-optical device includes a substrate main body, a branch wiring portion branched from the substrate main body and provided to extend in a surface direction of the substrate main body, and provided on the substrate main body. A first output-side terminal area provided, a second output-side terminal area provided on the branch wiring portion and formed on the same side as the first output-side terminal area, and an input-side terminal area By bending the branch wiring portion at a predetermined position, at least the surface on which the second output terminal region is formed is inverted, and the arrangement direction of the wiring in the second output terminal region and The arrangement direction of the wiring in the first output terminal area is the same, the first output terminal area is joined to the first wiring joining area, and the second output terminal area is Bonded to the second wiring bonding area. That.

This flexible wiring board can provide, for example, the following operational effects. The flexible wiring board is bent at a predetermined position of the branch wiring section, so that the wiring arrangement direction in the second output terminal area is the same as the wiring arrangement direction in the first output terminal area. Then, the second output side terminal region is joined to the second wiring joining region. Therefore, according to this flexible wiring board, the branch wiring portion can be bonded to the short side of the second wiring bonding region. That is, a joining margin becomes unnecessary. Therefore, even when applied to an electro-optical device, this flexible wiring board can contribute to an increase in the area ratio of the display region.

(Shape / Structure of Flexible Wiring Board) In the flexible wiring board of the present invention, its shape, layer structure and wiring structure are set in accordance with the structure and wiring structure of the joined object. The flexible wiring board of the present invention preferably includes at least one of the following five configurations.

(1) First, the branch wiring portion is configured to bend from the substrate main body in a substantially L-shape and extend. According to this configuration, the flexible wiring board has a simple configuration.

(2) Second, by bending the branch wiring portion at a predetermined position, the second output-side terminal region is positioned at an end of the first output-side terminal region. The configuration is located outside. As an aspect of this configuration, for example, there are the following two aspects. 1) First
An embodiment in which the branch wiring portion is bent to an opposite side to an end side of the first output side terminal region. 2) Second
The branch wiring section is bent to the same side with respect to the end side of the first output side terminal region.

(3) Third, the substrate main body and the branch wiring portion are formed of a single flexible substrate, and the first output terminal area and the second output terminal area are This is a configuration formed on the same surface. Since the first output side terminal region and the second output side terminal region are formed on the same surface, a flexible wiring board can be manufactured by a simple manufacturing process.

(4) Fourth, the branch wiring portion has a fold portion in the middle thereof. Since the branch wiring portion has the fold portion, the branch wiring portion can be easily bent, and can be joined to a predetermined position while accurately and easily positioning the branch wiring portion as compared with the related art. As a configuration of the fold portion, for example, a configuration in which a groove is formed on the surface of the branch wiring portion at a position to be bent can be cited.

(5) Fifth, the branch wiring portion has a knob portion. Since the branch wiring portion is quite flexible, its free end is easy to move and difficult to handle. However, by forming the knob portion on the branch wiring portion, the knob portion can be temporarily fixed by being mechanically or manually supported or sandwiched, thereby facilitating handling. As a result, it is possible to join the branch wiring portion at a predetermined position while accurately and easily positioning the branch wiring portion.

[Electro-optical device of the present invention] The electro-optical device of the present invention is an electro-optical device including an electro-optical panel having an electro-optical material layer between a first substrate and a second substrate facing each other. The first substrate has a first wiring bonding region that does not overlap with the second substrate, and the second substrate has a second wiring bonding region that does not overlap with the first substrate. A wiring connection region, wherein the first wiring bonding region and the second wiring bonding region are connected to the flexible wiring board according to any one of claims 1 to 8, The first output-side terminal region is connected to the first wiring junction region, and the second output-side terminal region of the flexible wiring board is bent at a predetermined position of the branch wiring portion, and Is connected to the wiring junction region of the Output connection between the terminal region and the second wiring connection area of the is done in the short side of the wiring connection area of the second.

According to the configuration of the electro-optical device, since the flexible wiring board of the present invention is applied, the area ratio of the display region can contribute to an increase as compared with the related art.

In the electro-optical device, the material of the electro-optical material layer is not particularly limited, and various electro-optical materials such as liquid crystal and electroluminescence can be selected.

In the electro-optical device, a signal wiring is provided in the first output terminal area provided in the substrate body of the flexible wiring board, and the second wiring provided in the branch wiring portion is provided. It is desirable that a scanning wiring be provided in the output terminal area. This configuration is effective for a color electro-optical device that requires more signal electrodes than scanning electrodes.

Further, in the electro-optical device, a semiconductor device, for example, a driver IC can be mounted on at least one of the first wiring bonding region and the second wiring bonding region.

[Method of Manufacturing Electro-Optical Device of the Present Invention] In a method of manufacturing an electro-optical device of the present invention, an electro-optical panel having an electro-optical material layer between a first substrate and a second substrate facing each other. And comprising the following steps (a) and (b). (A) The first substrate has a first wiring bonding region that does not overlap with the second substrate, and the second substrate does not overlap with the first substrate. 9. A step of forming an electro-optical panel arranged with two wiring bonding regions, (b) the first wiring bonding region and the second wiring bonding region, and any one of claims 1 to 8. Wherein the first output side terminal area of the flexible wiring board is connected to the first wiring bonding area, and thereafter,
A predetermined position of the branch wiring portion is bent to position the branch wiring portion at a predetermined position, and the second output-side terminal region of the flexible wiring board is on a short side of the second wiring bonding region. The process of joining.

According to this method of manufacturing an electro-optical device, it is possible to manufacture an electro-optical device in which the area ratio of the display region is increased by simple steps.

[Electronic Equipment of the Present Invention] The electronic equipment of the present invention includes the electro-optical device according to any one of claims 10 to 12. These electronic devices have the advantages of the flexible wiring board and the electro-optical device according to the present invention described above,
For example, it is possible to reduce the size of an electronic device.

[0037]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, examples of an electro-optical device and an electronic apparatus to which the flexible wiring board according to the present invention is applied will be described with reference to the drawings.

First Embodiment [Electro-Optical Device] FIGS. 1 and 2 show an example in which the electro-optical device according to the present invention is applied to a passive matrix driving type reflection type liquid crystal display device. FIG. 1 is a plan view schematically showing the liquid crystal display device according to the first embodiment, and FIG. 2 is an enlarged plan view showing a part of the liquid crystal display device shown in FIG.

The liquid crystal display device 20 according to the present embodiment
As shown in FIG. 1, a liquid crystal display panel (electro-optical panel)
21, a flexible wiring board 23 connected to the first substrate 25 and the second substrate 26 constituting the liquid crystal display panel 21, and a printed circuit board 24 connected to the flexible wiring board 23.

(Liquid Crystal Display Panel) First, the liquid crystal display panel 2
1 will be described.

The liquid crystal display panel 21 has a first substrate 25 and a second substrate 26 arranged to face each other. A sealing material (not shown) is provided between these first and second substrates 25 and 26 so as to go around the display area.
Is arranged. A liquid crystal layer (not shown) is sealed in a region formed by the first and second substrates 25 and 26 and the sealing material. First and second substrates 2
Reference numerals 5 and 26 are made of, for example, a glass substrate, a plastic substrate, or the like.

The surface of the first substrate 25,
A plurality of signal electrodes 27 are arranged in parallel on a surface facing the substrate 26 (hereinafter referred to as a “facing surface of the first substrate 25”). The signal electrode 27 is made of a conductive material having transparency to display light, for example, ITO (Indium).
Tin Oxide). These signal electrodes 27
Are arranged at a predetermined interval from each other along a predetermined direction (X direction in FIG. 1). On the other hand, a plurality of scanning electrodes 28 are provided on the surface of the second substrate 26 on the side facing the first substrate 25 (hereinafter, this surface is referred to as the “facing surface of the second substrate 26”). Are located. These scanning electrodes 28 are formed of a conductive material that reflects display light, for example, a metal. These scanning electrodes 28 are arranged in parallel in a predetermined direction (Y direction in FIG. 1) at a predetermined interval from each other. That is, the plurality of signal electrodes 27 formed on the first substrate 25 and the plurality of scanning electrodes 28 formed on the second substrate 26 are mutually connected via a liquid crystal layer or the like (including an alignment film not shown). They are orthogonal and form a so-called XY matrix.

The liquid crystal display panel 21 has a first wiring connection area 25A and a second wiring connection area 26A on two adjacent sides thereof. First wiring junction region 2
5A, on the lower side of FIG. 1, the edge of the first substrate 25 protrudes from the edge of the second substrate 26, and the first substrate 25 is formed on the opposing surface that does not overlap with the second substrate 26. Have been. In the second wiring bonding region 26A, on the left side of FIG. 1, the edge of the second substrate 26 protrudes from the edge of the first substrate 25, and the second substrate 26 overlaps the first substrate 25. It is formed on the opposite surface that does not have to be.

A signal driver (X driver) IC2 is provided in the first wiring junction region 25A of the first substrate 25.
9 and 30 are implemented. The mounting method of these signal driver ICs 29 and 30 is not particularly limited, but is mounted by, for example, a COG (Chip On Glass) method. These signal driver ICs 29 and 30 are connected to a terminal 27A that is continuous with the signal electrode 27 and a bonding terminal 31 that is arranged on the long side of the first wiring bonding region 25A of the first substrate 25. ing. The signal driver ICs 29 and 30 are connected to the terminal portions 27 of the signal lines 27, respectively.
A and the bonding terminal 31 are flip-chip mounted by, for example, face-down.

On the other hand, as shown in an enlarged manner in FIG. 2, a scanning driver IC 32 is mounted, for example, by COG on the second wiring joint region 26A of the second substrate 26. The scanning driver IC 32 includes a plurality of terminals 2 of the plurality of scanning electrodes 28.
8A and a plurality of joint terminal portions 33. The scanning driver IC 32 is, for example, flip-chip mounted face down on the terminal portion 28A of the scanning electrode 28 and the joint terminal portion 33. further,
The joining terminal portion 33 is arranged so as to be routed in the second wiring joining region 26 </ b> A so that the input terminal portion 33 </ b> A extends to the end on the flexible wiring board 23 side.

As described above, in the present embodiment, in the second wiring bonding region 26A, the bonding terminal 33 is
It is preferable that the input side terminal portion 33A is arranged so as to extend in a direction orthogonal to the scanning electrodes 28, that is, in a direction parallel to the signal electrodes 27. By arranging the joining terminal portions 33 in this manner, the flexible wiring board 23 is joined on the short side of the second wiring joining region 26A. Therefore, unlike the conventional example shown in FIG. 10, the dimension x3 for separating the scanning driver IC 13 from the output terminal 5A of the flexible substrate 5 and the amount of folding required for bending the flexible substrate 5 are not required. . As a result, the area ratio of the display area to the entire surface of the liquid crystal display panel 1 can be further increased.

(Flexible Wiring Board) Next, the flexible wiring board will be described. FIG. 3 is a plan view schematically showing an example of the flexible wiring board 23 according to the present invention.

The flexible wiring board 23 is one of the features of this embodiment, and has a substrate body 234, a branch wiring section 235, and an input wiring section 236. The substrate main body 234 has a short end portion having a small width dimension (indicated by reference numeral L1 in FIG. 3). The branch wiring portion 235 is provided so as to branch from the substrate main body 234 and extend in the surface direction of the substrate main body 234. That is, the branch wiring section 23
5 is branched from one side of the substrate main body 234 into an L-shape, and has a short width dimension (indicated by reference numeral L2 in FIG. 3). In the present embodiment, the branch wiring portion 235 is formed so as to protrude rearward (to the right in FIG. 3). Specifically, the branch wiring portion 235 is provided on an end side of a first output side terminal region 234A described later. Is formed to be bent to the opposite side. The input wiring portion 236 is formed so as to protrude rearward (to the right in FIG. 3) from the rear portion of the substrate main body 234. And
The front end (left side in FIG. 3) of the substrate main body 234 constitutes a first output terminal area 234A, and the rear end of the branch wiring part 235 constitutes a second output terminal area 235A. An end of the wiring portion 236 forms an input terminal region 236A.

The flexible wiring board 23 is formed on one surface of a flexible board 231 made of, for example, an electrically insulating resin, that is, a plurality of signal wirings 232 and a plurality of scanning wirings 233, as required. And other wiring (not shown).

The signal wiring 232 is formed in a predetermined pattern on the input wiring portion 236 and the substrate main body 234. The scanning wiring 233 is formed in a predetermined pattern in the input wiring part 236, the substrate main body 234, and the branch wiring part 235.

The layer structure of the flexible wiring board 23 is not particularly limited, and may have a known structure. In the present embodiment, the first output terminal area 234A, the second output terminal area 235A, the input terminal area 236A, the signal wiring 232, and the scanning wiring 233 are on the same surface. Is formed. On the upper surface of the flexible substrate 231,
In order to protect the signal wiring 232 and the scanning wiring 233, a flexible and insulating protective layer (not shown) can be formed as necessary. When the protection layer is formed, the protection layer may be provided on the first output terminal region 23 as necessary.
4A and the second output terminal area 235A. The signal wiring 232 is connected to the first substrate 25.
The scanning line 233 is connected to the bonding terminal 31 disposed on the second substrate 26 and is connected to the bonding terminal 31 disposed on the second substrate 26.
3 is connected.

As described above, in the flexible wiring board 23 in the present embodiment, the first output terminal area 234A and the second output terminal area 235A are formed on the same surface of the flexible substrate 231. I have.

Then, as shown in FIG. 1, the first output side terminal region 234A is joined at the first wiring junction region 25A of the first substrate 25, and the second output side terminal region 2
35A is joined in the second wiring joining area 26A of the second substrate 26, and the input terminal area 236A is joined to the printed circuit board 24. The second output terminal area 235A is formed in the first output terminal area 23 by the branch wiring portion 235 being bent at a predetermined position.
It is located outside the substrate body 234 on the end side of 4A. Specifically, the second output-side terminal region 235A is
In the region of the wiring junction region 26A. As a result, the second output side terminal region 235A is
6A. This bending is preferably performed so that the surface on which the wiring is formed is on the outside so that the wiring does not come into contact with the wiring.

With the flexible wiring board 23 having the above configuration, the following functions and effects can be obtained. The branch wiring portion 235 has an X
Since the width in the direction is short and quite flexible, its free end is mobile and difficult to handle and align. However, in the present embodiment, as will be described later, by bending the branch wiring portion 235 at a predetermined position, the tip of the branch wiring portion 235 (the second output side terminal region 235A) is formed in a predetermined region (the second wiring joint 235). Region 26A). Then, when the branch wiring portion 235 is bent, by defining the fold region such that its tip is located in the predetermined region, it is possible to join the branch wiring portion 235 to a predetermined position while accurately positioning it.

As shown in FIG. 3, the branch wiring portion 235 preferably has a fold 235C at a portion indicated by a chain line c. The fold part 235C is for making the branch wiring part 235 easy to bend. The configuration of the fold portion 235C is not particularly limited as long as the configuration allows the branch wiring portion 235 to be easily bent. For example, a configuration in which a groove is formed in the fold region can be given. With the configuration further including the fold portion 235C, the branch wiring portion 235 can be more easily bent at a predetermined position, and can be joined to a predetermined position while positioning the branch wiring portion 235 more accurately.

Also, a first output terminal area 234A,
The second output terminal area 235A and the input terminal area 23
6A, the signal wiring 232, and the scanning line wiring 233 are formed on the same surface. Therefore, the flexible wiring board 23 can be easily manufactured.

As shown in FIG. 3, it is preferable that a knob 235B for handling is formed at the end of the branch wiring portion 235. The knob 235B can be formed so as to protrude to the side opposite to the substrate main body 234. This knob 235B is
In the step of joining the output-side terminal region 235A to the portion to be joined, any size or shape may be used as long as it can be mechanically or manually supported or sandwiched. Further, it is preferable that no wiring is formed on the knob 235B in order to avoid mechanical damage to the wiring. By forming the knob portion 235B on the branch wiring portion 235 in this manner, the knob portion 235B can be temporarily fixed by being mechanically or manually supported or sandwiched, so that the handling of the branch wiring portion 235 can be performed. It will be easier.

(Printed Circuit Board) As shown in FIG. 1, the printed circuit board 24 has a wiring circuit on which various electronic components 241 such as a power supply IC are mounted. The printed board 24 has a connection portion 242 that is joined to the input terminal area 236A of the flexible wiring board 23 and is electrically connected to the signal wiring 232 and the scanning wiring 233.

[Joining Method] Next, an example of a joining method of the flexible wiring board 23 having such a configuration and the liquid crystal display panel 21 will be described.

(A) First, as shown in FIG. 1, the first output terminal area 234A of the flexible wiring board 23 is
The first wiring joint region 25A of the first substrate 25 is joined via an anisotropic conductive film (ACF) (not shown). In this step, the signal wiring 232 of the first output terminal area 234A and the bonding terminal 31 of the first wiring bonding area 25A are electrically connected.

(B) Next, the flexible wiring board 23
The second output side terminal region 235A formed in the branch wiring portion 235 of the second substrate 26 and the second wiring joint region 26 of the second substrate 26
A is joined via an anisotropic conductive film (not shown). At this time, the fold area is defined at a predetermined position of the branch wiring section 235, and the branch wiring section 235 is bent. Specifically, the branch wiring portion 235 is bent at a location indicated by a chain line c in FIG. Then, the second output side terminal area 235A of the branch wiring section 235 is connected to the second wiring joint area 2
6A. As described above, by folding the branch wiring portion 235 by defining the fold region at a predetermined position, the second output-side terminal region 235 of the branch wiring portion 235 is formed.
A can be easily and accurately arranged in the second wiring junction region 26A. In this step, the scanning wiring 233 in the second output side terminal area 235A and the bonding terminal 33 (input side terminal 33A) in the second wiring bonding area 26A are formed.
Are electrically connected.

(C) Next, the flexible wiring board 23
The input terminal area 236A of the input wiring section 236 is connected to the connection section 242 of the printed circuit board 24 via an anisotropic conductive film (not shown).

(D) Next, if necessary, the printed circuit board 24 can be arranged on the back side of the liquid crystal display panel 21 by bending the flexible wiring board 23 at the location indicated by the chain line a in FIG. Also, at a position indicated by a chain line b in FIG.
B can be bent to the back side of the liquid crystal display panel 21 or the knob 235B can be cut. The liquid crystal display panel 21 can be housed in a chassis or the like without sacrificing the display area of the liquid crystal display panel 21 by bending or cutting the knob 235B of the branch wiring portion 235 in this manner. .

[Operation and Effect] Next, main operation and effect of the liquid crystal display device according to the present embodiment will be described.

According to the present embodiment, as described above,
The branch wiring portion 235 of the flexible wiring board 23 can be bent at a predetermined position, and can be joined to a predetermined position while accurately positioning the branch wiring portion 235. Thereby, the flexible wiring board 23 and the liquid crystal display panel 21
It is easy to automate the joining with the substrate.

In this embodiment, the second wiring junction region 2
By joining the second output side terminal area 235A of the flexible printed circuit board 23 and the joining terminal section 33 on the short side of the 6A, the margin for joining and folding of the flexible printed circuit board at least on one side of the liquid crystal display panel 21. Is unnecessary, so that the area ratio of the display area to the entire liquid crystal display panel 21 can be increased. By thus increasing the area ratio of the display region, display visibility can be improved.

Further, according to the present embodiment, the flexible wiring board 23 is disposed in one direction of the liquid crystal display panel 21 (FIG. 1).
(In the Y direction), the terminal connection step can be facilitated. Further, according to the present embodiment, using one flexible wiring substrate 23, first wiring bonding region 25A and second wiring bonding region 26 formed on first and second substrates 25 and 26, respectively.
A can be connected to the flexible wiring board 2
3 can improve the convenience.

Further, since the input wiring portion 236 of the flexible wiring board 23 can be joined to the printed board 24 at one place, the joining process of the flexible wiring board 23 and the printed board 24 can be simplified. it can. Also, the flexible wiring board 23 and the printed circuit board 2
4 can be joined at one place, so that the printed circuit board 24
Can be reduced in size.

Second Embodiment [Electro-Optical Device] FIGS. 4 and 5 show an example in which the electro-optical device according to the present invention is applied to a reflection type liquid crystal display device of a passive matrix drive system. FIG. 4 is a plan view schematically showing the liquid crystal display device according to the second embodiment. FIG. 5 is an enlarged plan view showing a part of the liquid crystal display device shown in FIG. FIG. 6 is a plan view schematically showing a flexible wiring board.

The liquid crystal display device 12 according to the second embodiment
0 differs from the first embodiment in the configuration of the flexible wiring board 123. Otherwise, the first
This is the same as the embodiment. Therefore, portions having substantially the same functions are denoted by the same reference numerals, and detailed description of the liquid crystal display panel and the printed circuit board will be omitted.

Hereinafter, the flexible wiring board 123 will be described.

The flexible wiring board 123 according to the second embodiment is different from the flexible wiring board 2 according to the first embodiment in terms of the configuration of the branch wiring section.
Different from 3. The flexible wiring board 123 according to the second embodiment is the same as the flexible wiring board 23 according to the first embodiment except for the configuration of the branch wiring section 235. For this reason, detailed description of points other than the configuration of the branch wiring unit 235 is omitted.

The branch wiring portion 235 is provided so as to branch from the substrate main body 234 and extend in the surface direction of the substrate main body 234. That is, the branch wiring portion 235 is
An L-shaped branch is formed from one side of 34, and its width dimension (indicated by reference numeral L2 in FIG. 3) is short. In the present embodiment, the branch wiring portion 235 is formed so as to protrude forward (to the left in FIG. 6).
Is bent to the same side with respect to the end side of the output side terminal region 234A. The front end of the branch wiring portion 235 forms a second output terminal area 235A.

The following effects can be achieved by the flexible wiring board 123 having the above configuration. Since the branch wiring portion 235 has a shorter width in the X direction and is considerably more flexible than the substrate body 234, the free end thereof is easy to move, and handling and positioning are difficult. However, in the present embodiment, as described later, by bending the branch wiring portion 235, the tip of the branch wiring portion 235 (the second output terminal region 235) is formed.
A) is bonded to a predetermined region (second wiring bonding region 26A). Then, when the branch wiring portion 235 is bent, by defining the fold region such that its tip is located in the predetermined region, it is possible to join the branch wiring portion 235 to a predetermined position while accurately positioning it.

Further, as shown in FIG. 6, the substrate main body 234 preferably has a fold 234B at a portion indicated by a chain line c. The function, configuration, and operation and effect of the fold portion 234B are the same as those of the first embodiment.

As shown in FIG. 6, the branch wiring portion 235 preferably has a knob 235B for handling. The knob 235 </ b> B can be formed so as to protrude at the base of the branch wiring part 235 on the side opposite to the substrate body 234. Knob part 23
The size, shape, wiring structure and operational effects of 5B are the first.
This is the same as the embodiment.

[Joining Method] Next, an example of a method of joining the flexible wiring board 123 having such a configuration to the liquid crystal display panel 21 will be described.

(A) First, as shown in FIG. 4, the first output side terminal area 234A of the flexible wiring board 123 is formed.
And a first wiring joint region 25A of the first substrate 25,
The bonding is performed via an anisotropic conductive film (ACF) not shown. In this step, the signal wiring 232 of the first output terminal area 234A and the bonding terminal 31 of the first wiring bonding area 25A are electrically connected.

(B) Next, the flexible wiring board 12
The second output side terminal area 235A formed in the third wiring section 235 and the second wiring connection area 2 of the second substrate 26
6A is joined via an anisotropic conductive film (not shown). At this time, the fold area is defined at a predetermined position of the branch wiring section 235, and the branch wiring section 235 is bent. Specifically, the branch wiring portion 235 is bent at a position indicated by a chain line c in FIG. Then, the second output side terminal area 235A of the branch wiring section 235 is connected to the second wiring joint area 2
6A. As described above, by folding the branch wiring portion 235 by defining the fold region at a predetermined position, the second output-side terminal region 235 of the branch wiring portion 235 is formed.
A can be easily and accurately arranged in the second wiring junction region 26A. In this step, the scanning wiring 233 in the second output side terminal area 235A and the bonding terminal 33 (input side terminal 33A) in the second wiring bonding area 26A are formed.
Are electrically connected.

(C) Next, the flexible wiring board 12
The input side terminal area 236A of the third input wiring part 236 and the connection part 242 of the printed circuit board 24 are joined via an anisotropic conductive film (not shown).

(D) Next, if necessary, the printed circuit board 24 can be disposed on the back side of the liquid crystal display panel 21 by bending the flexible wiring board 123 at a location indicated by a chain line a in FIG.

[Operation and Effect] The operation and effect of the liquid crystal display device according to the present embodiment are the same as the operation and effect of the first embodiment, and a description thereof will be omitted.

<< Third Embodiment >> [Modification of Liquid Crystal Display Panel] The liquid crystal display panel 21 is not limited to those shown in the first and second embodiments. Deformation is possible.

FIG. 7 shows a modification of the liquid crystal display panel 21. 7, portions having substantially the same functions as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the liquid crystal display panel shown in FIG. 1, an example is shown in which the flexible wiring board of the present invention is applied to a passive matrix driving type liquid crystal display panel, but the flexible wiring board of the present invention is used as a switching element for a pixel electrode. The present invention is also applicable to an active matrix driving type liquid crystal display panel using a TFD element.

Since the structure of the first bonding region 25A and the second bonding region 26A is the same as that of the liquid crystal display panel of FIG. 1, the structure inside the sealing material is shown in FIG.

The liquid crystal display panel 21 has a first substrate 25 and a second substrate 26 arranged to face each other. A sealing material (not shown) is provided between these first and second substrates 25 and 26 so as to go around the display area.
Is arranged. Then, these first and second substrates 2
A liquid crystal layer (not shown) is sealed in a region formed by the sealing materials 5 and 26 and the sealing material. First and second substrates 2
Reference numerals 5 and 26 are made of, for example, a glass substrate, a plastic substrate, or the like.

Further, the surface of the first substrate 25,
A plurality of pixel electrodes 1034 arranged in a matrix and a signal electrode 27 extending in the X direction are arranged on the surface of the TF is applied to one signal electrode 27, respectively.
They are commonly connected via a D element 1020. The pixel electrode 1034 is formed using a conductive material having transparency with respect to display light,
For example, it is formed of ITO (Indium Tim Oxide). The TFD element 1020 includes a first metal film 1022, an oxide film 1024 obtained by anodizing the first metal film 1022, and a second metal film 1026 when viewed from the substrate 25 side. Adopt a body / metal sandwich structure. For this reason, the TFD element 1020 has positive and negative bidirectional diode switching characteristics.

On the other hand, on the surface of the second substrate 26, the first substrate
A plurality of scan electrodes 28 are provided on the surface of the
Is arranged. These scanning electrodes 28 are arranged in parallel in a predetermined direction (Y direction in FIG. 7) orthogonal to the signal electrodes 27 with a predetermined interval therebetween, and serve as counter electrodes of the pixel electrodes 1034. They are arranged. Although not shown in FIG. 7, the color filters are provided corresponding to regions where the scanning electrodes 28 and the pixel electrodes 1034 cross each other.

Further, the liquid crystal display panel 21 according to the present embodiment has the first wiring junction region 25A on two adjacent sides thereof, similarly to the liquid crystal display panels according to the first and second embodiments. , A second wiring junction region 26A. Further, the liquid crystal display panel 21 according to the present embodiment
The flexible wiring board of the present invention, for example, the flexible wiring boards described in the first and second embodiments can be connected.

Fourth Embodiment (Electronic Apparatus) Hereinafter, an example of an electronic apparatus using a liquid crystal display device as an electro-optical device according to the present invention will be described.

(1) Digital Still Camera A digital still camera using the liquid crystal display device according to the present invention as a finder will be described. FIG. 8 is a perspective view showing the configuration of the digital still camera, and also simply shows the connection with an external device.

In a normal camera, a film is exposed by an optical image of a subject, while a digital still camera 1 is used.
Reference numeral 200 denotes a CCD (Charge Coupled Dev)
In this case, an image pickup signal is generated by photoelectric conversion by an image pickup device such as ice). Here, the digital still camera 1
The liquid crystal display panel of the liquid crystal display device 1000 is provided on the back surface (the front surface side in FIG. 8) of the case 1202 in 200, and is configured to perform display based on an image pickup signal by a CCD. For this reason, the liquid crystal display device 100
0 functions as a finder for displaying the subject. The front side of the case 1202 (the rear side in FIG. 8)
Has a light receiving unit 1 including an optical lens and a CCD
204 is provided.

Here, the photographer checks the subject image displayed on the liquid crystal display device 1000, and presses the shutter button 120
When 6 is depressed, the imaging signal of the CCD at that time is transferred and stored in the memory of the circuit board 1208. Also, in the digital still camera 1200,
A video signal output terminal 1212 is provided on the side of the case 1202.
And an input / output terminal 1214 for data communication. As shown in FIG. 8, a television monitor 13 is connected to the former video signal output terminal 1212 as necessary.
00 is connected, and a personal computer 1400 is connected to the input / output terminal 1214 for data communication. Further, by a predetermined operation, the circuit board 120
8 is stored in the memory of the TV monitor 13
00, and output to the personal computer 1400.

(2) Cellular Phone and Other Electronic Equipment FIGS. 9A, 9B and 9C show examples of other electronic equipment using a liquid crystal display device as the electro-optical device according to the present invention. FIG. FIG. 9A shows the mobile phone 3.
000, and a liquid crystal display device 1000 is provided above the front surface. FIG. 9B illustrates a wristwatch 4000 in which a display portion using a liquid crystal display device 1000 is provided at the center of the front of the main body. FIG. 9C illustrates a portable information device 5000.
And a display unit including the liquid crystal display device 1000 and an input unit 5100.

These electronic devices are composed of a liquid crystal display 100
In addition to 0, although not shown, a configuration including a display signal generation unit including various circuits such as a display information output source, a display information processing circuit, and a clock generation circuit, and a power supply circuit for supplying power to those circuits is included. Is done. For example, in the case of the portable information device 5000, a display image is formed by supplying a display signal generated by the display signal generation unit based on information or the like input from the input unit 5100 to the display unit.

The electronic equipment into which the liquid crystal display device according to the present invention is incorporated is not limited to a digital still camera, a mobile phone, a wristwatch, and a portable information equipment.
Pagers, POS terminals, IC cards, minidisc players, liquid crystal projectors, multimedia-capable personal computers (PCs) and engineering workstations (EWS), notebook personal computers, word processors, televisions, viewfinders or direct-view monitors Various electronic devices such as a video tape recorder, an electronic organizer, an electronic desk calculator, a car navigation device, a device having a touch panel, and a clock can be considered.

In the driving method, a liquid crystal display panel is a simple matrix liquid crystal display panel or a static driving liquid crystal display panel using no switching element in the panel itself, a three-terminal switching element represented by a TFT (thin film transistor), or a liquid crystal display panel. An active matrix liquid crystal display panel using a two-terminal switching element represented by a TFD (thin film diode). In terms of electro-optical characteristics, TN type, STN type, guest host type, phase transition type,
Various types of liquid crystal display panels such as a ferroelectric type can be used.

{Modifications} The embodiments of the present invention have been described above.
Electro-optical device and its manufacturing method, and electronic equipment,
The present invention is not limited to the configuration described above, and various changes can be made within the scope of the present invention.

In terms of the driving method, a liquid crystal display panel can be a simple matrix liquid crystal display panel or a static drive liquid crystal display panel that does not use a switching element in the panel itself.
Also, an active matrix liquid crystal display panel using a three-terminal switching element represented by a TFT or a two-terminal switching element represented by a TFD (Thin Film Diode), and in terms of electro-optical characteristics, a TN type, an STN type,
Various types of liquid crystal display panels such as a guest host type, a phase transition type, and a ferroelectric type can be used.

Further, in the above-described embodiment, an example is shown in which the flexible wiring board is used for connecting the liquid crystal display panel and the circuit board. However, another type of display panel, for example, the connection between the display plasma panel and the circuit board is used. Needless to say, it can also be used in Further, in the above-described embodiment, the signal electrode 27 is formed of a material having transparency with respect to display light, and the first substrate 25 on which the signal electrode 27 is formed is set as the front substrate. May be formed.

In the above-described embodiment, the signal wiring 232 formed on the flexible wiring board 23 is used.
The wiring of the scanning wiring 233 can be changed as appropriate according to the arrangement of the joints of the liquid crystal display panel 21.

Further, in the above-described embodiment,
Wiring joint area 25 of first and second substrates 25 and 26
A, 26A with signal driver ICs 29, 30, 32, C
Although the OG is mounted, the driver IC does not have to be formed on the substrate. For example, a terminal portion of a signal electrode or a scanning electrode is arranged in a wiring junction region, and a driver IC is provided between these terminal portions and a terminal region of a flexible printed wiring board.
May be configured to interpose a tape carrier package on which is mounted.

In the above embodiment, the liquid crystal display device is constituted by the liquid crystal display panel and the circuit board on which the driving circuit and the like are mounted. However, the driving circuit is provided on the transparent substrate constituting the liquid crystal display panel. Etc. are also installed,
Other circuits are formed on the circuit board and the flexible wiring board.

Further, in the above-described embodiment, the case where the LCD display is used as the electro-optical display means has been described. However, the present invention is not limited to this. For example, a thin cathode ray tube or a small-sized Television, electroluminescence, plasma display, CRT display, FED (Field Emissi
Various electro-optical means such as an on-display panel can be used.

[Brief description of the drawings]

FIG. 1 is a plan view schematically showing a liquid crystal display device to which an electro-optical device according to a first embodiment is applied.

FIG. 2 is an enlarged plan view showing a part of the liquid crystal display device shown in FIG.

FIG. 3 is a plan view schematically showing the flexible wiring board according to the first embodiment.

FIG. 4 is a plan view schematically showing a liquid crystal display device to which the electro-optical device according to the second embodiment is applied.

FIG. 5 is an enlarged plan view showing a part of the liquid crystal display device shown in FIG. 4;

FIG. 6 is a plan view schematically showing a flexible wiring board according to a second embodiment.

FIG. 7 is a partially broken perspective view schematically showing a part of a modification of the liquid crystal display panel.

FIG. 8 is an external view showing an electronic apparatus (digital still camera) to which the liquid crystal display device according to the present invention is applied.

9A and 9B are external views illustrating an electronic device using the liquid crystal display device according to the present invention, wherein FIG. 9A is a mobile phone, FIG. 9B is a wristwatch, and FIG. 9C is a mobile information device.

FIG. 10 is a plan view schematically showing an example of a conventional liquid crystal display device.

FIG. 11 is a structural view of a liquid crystal display device according to the related art.

FIG. 12 is a development view of a flexible circuit board according to the related art.

[Explanation of symbols]

 REFERENCE SIGNS LIST 20 liquid crystal display device 21 liquid crystal display panel 23 flexible wiring board 24 printed circuit board 25, 26 substrate 25A, 26A wiring bonding area 27 signal electrode 28 scanning electrode 29, 30 driver IC 31 for signal 31 bonding terminal 32 scanning driver IC 33 bonding terminal Unit 231 Flexible substrate 232 Signal wiring 233 Scanning wiring 234 Substrate body 235 Branch wiring unit 234A, 235A Output side terminal area 236A Input side terminal area 235B Knob 1020 TFD element 1022 First metal film 1024 Anodized film 1026 Second metal Film 1034 Pixel electrode

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 2H092 GA40 GA50 GA60 JA01 NA25 NA27 QA07 QA08 QA10 QA11 QA13 5E338 AA12 AA16 BB54 CC01 CD08 CD12 CD13 CD40 EE32 5E344 AA02 BB02 BB04 CC21 CC23 CD12 DD01 EE21 A05A18 BB21A00 EE33 EE37 EE41 EE47 KK05 LL07 LL10

Claims (14)

[Claims] A first wiring portion provided on the substrate main body; a branch wiring portion branching from the substrate main body and extending in a surface direction of the substrate main body; A second output terminal area provided on the branch wiring section and formed on the same side as the first output terminal area; and an input terminal area. By bending, at least the surface on which the second output terminal region is formed is inverted, and the arrangement direction of the wiring in the second output terminal region and the first
A flexible wiring board, in which the wiring arrangement direction in the output side terminal area is the same. 2. A first wiring joint region is formed in a region of the first substrate that has a first substrate and a second substrate facing each other, and does not overlap with the second substrate. A flexible wiring substrate applied to an electro-optical device in which a second wiring bonding region is formed in a region of the second substrate that does not overlap with the first substrate, comprising: a substrate body; and the substrate body. A branch wiring portion provided so as to extend in a surface direction of the substrate main body; a first output terminal region provided in the substrate main body; A second output-side terminal area formed on the same surface as the first output-side terminal area; and an input-side terminal area, wherein at least the second output-side terminal is formed by bending the branch wiring portion. The formation surface of the region is inverted and the second output terminal region is Direction of the wiring in the region and the first direction
The direction of arrangement of the wirings in the output side terminal area is the same, the first output side terminal area is joined to the first wiring joining area, and the second output side terminal area is the second direction.
Flexible wiring board joined to the wiring joining area of 3. The flexible wiring substrate according to claim 1, wherein the branch wiring portion extends from the substrate body in a substantially L-shaped manner. 4. The terminal according to claim 1, wherein the branch wiring portion is bent at a predetermined position so that the second output terminal region is located at an end of the first output terminal region. And a flexible wiring board located outside the board body. 5. The flexible wiring board according to claim 1, wherein the branch wiring portion is bent to a side opposite to an end of the first output terminal region. 6. The flexible wiring board according to claim 1, wherein the branch wiring portion is bent to the same side with respect to an end portion of the first output terminal region. 7. The device according to claim 1, wherein the substrate main body and the branch wiring portion are formed of a single flexible substrate, and wherein the first output terminal area and the second output are provided. The side terminal area is a flexible wiring board formed on the same surface. 8. The flexible wiring board according to claim 1, wherein the branch wiring part has a fold part in the middle thereof. 9. The flexible wiring board according to claim 1, wherein the branch wiring section has a knob. 10. An electro-optical device including an electro-optical panel having an electro-optical material layer between a first substrate and a second substrate facing each other, wherein the first substrate is provided with the second substrate. A first wiring bonding region that does not overlap with the substrate; the second substrate has a second wiring bonding region that does not overlap with the first substrate; And the second wiring connection region is connected to the flexible wiring board according to any one of claims 1 to 9, wherein the first output-side terminal region of the flexible wiring substrate is the first wiring The second output terminal area of the flexible wiring board is connected to the second wiring connection area by bending the branch wiring portion, and is connected to the second output terminal area of the flexible wiring board. The connection with the second wiring junction region is Made at the short sides of the second wiring connection area,
Electro-optical device. 11. The electro-optical device according to claim 10, wherein a semiconductor device is mounted on at least one of the first wiring bonding region and the second wiring bonding region. 12. The electro-optical device according to claim 10, wherein the semiconductor device is a driver IC. 13. A method for manufacturing an electro-optical device including an electro-optical panel having an electro-optical material layer between a first substrate and a second substrate facing each other, comprising the following step (a):
And (b), a method for manufacturing an electro-optical device. (A) the first substrate has a first wiring bonding region that does not overlap with the second substrate, and the second substrate does not overlap with the first substrate; 10. A step of forming an electro-optical panel arranged with two wiring bonding regions, (b) the first wiring bonding region and the second wiring bonding region, and any one of claims 1 to 9. Wherein the first output-side terminal area of the flexible wiring board is connected to the first wiring joining area, and then the branch wiring section is bent. Positioning the branch wiring portion at a predetermined position, and joining the second output-side terminal region of the flexible wiring board on a short side of the second wiring joining region. 14. An electronic apparatus comprising the electro-optical device according to claim 10.