JP2002072240A - Wiring board for connecting optoelectronic panel, optoelectronic device, and electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiring board for connecting an optoelectronic panel, an optoelectronic device, and electronic equipment, permitting to connect them in batch with a member for driving the optoelectronic panel. SOLUTION: The wiring board (flexible wiring board) for connecting the optoelectronic panel 400 is to be connected with the optoelectronic panel (liquid crystal display panel) 100 having a pair of opposing substrates 200, 300. The wiring substrate (flexible wiring board) for connecting the optoelectronic panel 400 has a 1st substrate 412 and a 2nd substrate 416, comprising a 1st terminal group 410 arranged on the 1st substrate 412, a 2nd terminal group 420 arranged on the 2nd substrate 416, and a 3rd terminal group 430 arranged on the 1st substrate 412 or the 2nd substrate 416. The 3rd terminal group 430 includes at least terminals conducting to the 1st terminal group 410 and those conducting to the 2nd terminal group 420.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiring substrate for connection to an electro-optical panel, an electro-optical device to which the wiring substrate is applied, and an electronic apparatus to which the electro-optical device is applied.

[0002]

2. Description of the Related Art As a conventional electro-optical panel, for example, a liquid crystal panel can be cited. The liquid crystal panel includes an active matrix type liquid crystal panel and a passive matrix type liquid crystal panel. The active matrix type liquid crystal panel has a switching element provided for each pixel electrode. This switching element is, for example, a thin film diode (TFD).
e) There are elements. A passive matrix liquid crystal panel has no switching element.

[0003] This liquid crystal panel is constructed by bonding a pair of transparent substrates to each other. In the liquid crystal panel, scanning lines are formed on a surface facing one transparent substrate, and data lines are formed on a surface facing the other transparent substrate. That is, the scanning lines and the data lines are formed on separate substrates.

For this reason, in a conventional liquid crystal panel,
On the upper transparent substrate, a first connection wiring substrate (for example, an FPC (Flexible Printed Circuit) substrate) is provided from below.
Is connected. On the other hand, a second connection wiring board is connected to the lower transparent substrate from above. Then, the terminal group of each connection wiring board is inserted into a connector mounted on an external control circuit.

By the way, conventionally, inspection of liquid crystal panels,
When the connection wiring board is connected to the liquid crystal panel for adjustment, various tests, etc., disconnect the terminal of the connection wiring board from the connector of the control circuit board, or conversely, connect to the connector of the control circuit board Often, the terminal of the wiring board is inserted.

However, when the connection wiring board has the above configuration, the following problem occurs.

(1) The control circuit board on which the connectors are mounted requires two connectors for the connection wiring board. That is, two connectors are required for connection between the first and second connection wiring boards and the control circuit board. For this reason, the number of components is increased.

(2) In the two connectors, the terminal group of the connection wiring board must be detached. Therefore, the inspection, adjustment, various tests, and the like of the liquid crystal panel become complicated.

[0009]

SUMMARY OF THE INVENTION An object of the present invention is to provide a wiring board for connecting an electro-optical panel, which can be collectively connected to, for example, a member for driving the electro-optical panel. .

Another object of the present invention is to provide an electro-optical device which can be easily manufactured using the wiring board for connecting an electro-optical panel of the present invention.

Another object of the present invention is to provide an electronic apparatus using the electro-optical device of the present invention.

[0012]

(Wiring board for connection of electro-optical panel) The wiring board for connection of the electro-optical panel of the present invention is connected to an electro-optical panel having a pair of opposed substrates. A wiring board for connection, comprising: a first base member; a second base member; a first terminal group provided on the first base member; and the second base member , A second terminal group, and a third terminal group provided on the first base material or the second base material, the third terminal group, at least, the It includes a terminal that conducts to the first terminal group and a terminal that conducts to the second terminal group.

In the wiring board for connection of an electro-optical panel according to the present invention, the third terminal group includes at least a terminal that conducts to the first terminal group and a terminal that conducts to the second terminal group. Therefore, according to the present invention, for example, the continuity between the first terminal group and the second terminal group and a member (for example, a control circuit board) for driving the electro-optical panel is set to the third terminal group.
Can be achieved collectively by using the terminal group.

The wiring board for connection of an electro-optical panel according to the present invention is preferably at least one of the following embodiments (a) to (j).

(A) The connection wiring board of the electro-optical panel has, at least in part, a laminated structure including the first base material, the wiring, and the second base material. It is an aspect. In the portion where the laminated structure is formed, one of the base materials can function as a protective layer of the wiring formed on the other base material.

(B) It is preferable that the connection surface of the first terminal group and the connection surface of the second terminal group face opposite sides. According to this, for example, it is easy to connect the first terminal group and the second terminal group to the opposing surfaces of the respective substrates of the electro-optical panel.

(C) Preferably, the first terminal group is exposed due to the absence of the second base material. Since the first terminal group is exposed, the connection between the electro-optical panel and the first terminal group becomes easier.

(D) Preferably, the second terminal group is exposed due to the absence of the first base material. Since the second terminal group is exposed, the connection between the electro-optical panel and the second terminal group becomes easier.

(E) The first base material is preferably made of a flexible insulating film. Thereby, when connecting the connection wiring board of the electro-optical panel to the electro-optical panel,
The connection wiring board can be flexibly deformed. Therefore, it is easier to connect the connection wiring board of the electro-optical panel to the electro-optical panel.

(F) Preferably, the second substrate is made of a flexible insulating film. Thereby, when connecting the connection wiring board of the electro-optical panel to the electro-optical panel,
The connection wiring board of the electro-optical panel can be flexibly deformed. Therefore, it is easier to connect the connection wiring board of the electro-optical panel to the electro-optical panel.

(G) The wiring can be made of a material mainly composed of copper, copper alloy (bronze, brass, beryllium copper, etc.), aluminum, aluminum alloy, gold or silver.

(H) The wiring board for connection of an electro-optical panel according to the present invention can take any one of the following modes.

The wiring in the first terminal group and the wiring in the second terminal group are in the same layer. In this case, the first terminal group and the second terminal group can be formed in the same patterning step.

The first base material further includes a fourth terminal group, which is electrically connected to the first terminal group.
The base material of the fifth terminal group is further electrically connected to the third terminal group.
And the fifth terminal group is electrically connected to the fourth terminal group.

In the case of this embodiment, the fourth terminal group and the fifth terminal group
By connecting the first base material on which the wiring is formed and the second base material on which the wiring is formed so that the terminal group is electrically connected to the terminal group, a wiring board for connection of the electro-optical panel is manufactured. be able to. For this reason, a wiring board for connection of an electro-optical panel can be easily manufactured.

(I) An embodiment further comprising a sixth terminal group which is electrically connected to the third terminal group. In this case, for example, the first terminal group or the second terminal group
With the sixth terminal group, signals (for example, scanning signals and data signals) can be input to the electro-optical panel.

(J) The shape of the first base material and the second base material
The shape of the base material is preferably substantially the same except for the terminal groups. According to this, one base material can function as a protective layer of wiring other than each terminal group in the other base material.

(Electro-optical device) The electro-optical device of the present invention is an electro-optical device including an electro-optical panel having a first substrate and a second substrate facing each other, wherein the first substrate is A first connection terminal region that does not overlap with the second substrate, the second substrate has a second connection terminal region that does not overlap with the first substrate, The first connection terminal region and the second connection terminal region are:
The first terminal group is electrically connected to the first connection terminal region, and the second terminal group is electrically connected to the connection wiring board of the electro-optical panel according to the present invention described above. It is electrically connected to the second connection terminal area.

The electro-optical device of the present invention has a wiring board for connecting the electro-optical panel of the present invention. For this reason, the connection of the connection wiring board of the electro-optical panel and a member (for example, a control circuit board) for driving the electro-optical panel can be collectively performed by the third terminal group. Therefore,
The connection wiring board for the electro-optical panel and the member for driving the electro-optical panel can be easily attached and detached. In addition, the electro-optical device can be easily and with high yield,
Can be manufactured.

The electro-optical device according to the present invention is preferably at least one of the following embodiments (a) to (d).

(A) At least one of the connection between the first terminal group and the first connection terminal region and the connection between the second terminal group and the second connection terminal region are anisotropic. It is preferable to use a conductive adhesive. Thus, the above connection step can be simplified.

(B) The electro-optical device is preferably used as a liquid crystal device. When the electro-optical device is used as a liquid crystal device, the function of the electro-optical device can be exhibited more effectively. When the electro-optical device is used as a liquid crystal display device, the function of the electro-optical device can be more effectively exhibited.

(C) The first terminal group is provided with a data line, and the second terminal group is provided with a scanning line. In this case, a data signal can be input from the first terminal group, and a scanning signal can be input from the second terminal group.

(D) A semiconductor device can be mounted on at least one of the first connection terminal region and the second connection terminal region. The semiconductor device is, for example,
A driver IC can be used.

(Electronic Equipment) The electronic equipment of the present invention includes the above-described electro-optical device according to the present invention. Thereby, for example, the convenience of the electronic apparatus is improved from the advantage of the electro-optical device according to the present invention. In addition, with simple and high yield,
Electronic equipment can be manufactured.

Hereinafter, the "wiring board for connection of the electro-optical panel" of the present invention is referred to as "wiring board for connection".

[0037]

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

First Embodiment [Electro-optical Device] First, an electro-optical device according to a first embodiment will be described. The electro-optical device according to the first embodiment is an example applied to an active matrix driving type liquid crystal display device. FIG. 1 is a plan view showing the entire configuration of the liquid crystal display device. FIG. 2 is a sectional view taken along the line AA in FIG.
It is sectional drawing which shows the cross section along the line typically.

The liquid crystal display device 10 has a liquid crystal panel (electro-optical panel) 100, a control circuit board 600, and a flexible wiring board (connection wiring board) 400.

(Liquid Crystal Panel) The liquid crystal panel 100 will be described below.

<Planar Structure> First, the planar structure of the liquid crystal panel 100 will be described.

The liquid crystal panel 100 is an active matrix type panel using a TFD element as a switching element for a pixel electrode. The liquid crystal panel 100 has a first
Substrate (element substrate) 200 and second substrate (counter substrate) 3
00. First substrate 200 and second substrate 300
Is a state in which the surfaces on which the electrodes described later are formed face each other,
Laminated.

First substrate 200 and second substrate 300
Has portions 210 and 310 projecting from each other. First
The lower portion of the substrate 200 (the far side in FIG. 1) protrudes from the second substrate 300 (the near side in FIG. 1),
It has a protrusion 210 that does not overlap with the second substrate.
The left side of the second substrate 300 is the first substrate 200
Projecting portion 31 which projects more and does not overlap with the first substrate
Has zero. In the protruding portion 210 of the first substrate 200, the first connection terminal region 202 is formed on the front side of the first substrate 200 (the side facing the second substrate). In the protruding portion 310 of the second substrate 300, the second connection terminal region 302 is formed on the back side (the side facing the first substrate) of the second substrate 300.

In the first connection terminal area 202, the first
(A semiconductor device having a function of driving data lines, a driver IC) 250 is mounted at a predetermined position. The first bare chip 250 is connected to each data line 212.
Are supplied with data signals. The first bare chip 250 is, for example, a COG (Chip On Glas).
s) Implemented by technology.

In the second connection terminal area 302, a second bare chip (semiconductor device having a function of driving scanning lines, driver IC) 350 is mounted at a predetermined position. The second bare chip 350 supplies a scanning signal to each scanning line 312. The second bare chip 350 is mounted by, for example, COG technology.

<Cross-Sectional Structure> The cross-sectional structure of the liquid crystal display panel 100 will be described below with reference to FIG.

The first bare chip 250 is connected to the input terminal 25
0a and an output terminal 250b. Input terminal 250a
Are electrically connected to the first connection terminal region 202. The output terminal 250b is electrically connected to each data line 212. The connection between the input terminal 250a and the first connection terminal area 202, and the output terminal 250b and each data line 2
12 can be connected by the anisotropic conductive adhesive 500. That is, the input terminal 250a and the first connection terminal region 202 are electrically connected via the conductive particles 500a dispersed in an anisotropic conductive adhesive 500 at an appropriate ratio, and the output terminal 250b And each data line 21
2 can be electrically connected.

The second bare chip 350 is connected to the input terminal 35
0a and an output terminal 350b. Input terminal 350a
Are electrically connected to the second connection terminal region 302. The output terminal 350b is electrically connected to each scanning line 312. The connection between the input terminal 350a and the second connection terminal region 302 can be performed in the same manner as the first bare chip 250. In addition, the connection between the output terminal 350b and each scanning line 312 can be performed in the same manner as the first bare chip 250.

<Internal Configuration> The internal configuration of the liquid crystal panel 100 will be described below. FIG. 3 is a partially cutaway perspective view schematically showing a part of the liquid crystal panel.

Of the first substrate 200, the second substrate 30
A plurality of pixel electrodes 234 arranged in a matrix and data lines (signal lines) extending in the column direction
212 are formed respectively. Each of the pixel electrodes 234 for one column is commonly connected to one data line 212 via a TFD element 220. T
The FD element 220 has a first metal film 22
2 and an oxide film 22 obtained by anodizing the first metal film 222.
4 and a second metal film 226. That is, the TFD element 220 includes the first metal film 222 / the oxide film 2
24 / the second metal film 226 is employed in a sandwich structure. For this reason, the TFD element 220 has positive and negative bidirectional diode switching characteristics.

On the other hand, scanning lines 312 are arranged on the surface of the second substrate 300 facing the first substrate 200. Specifically, the scanning lines 312 extend in a row direction orthogonal to the data lines 212 and are arranged so as to be opposed to the pixel electrodes 234. The color filters are not shown in FIG.
2 and the pixel electrode 234 are provided corresponding to regions where they intersect with each other. Therefore, a liquid crystal layer corresponding to one pixel includes a pixel electrode 234 and a scanning line 312 serving as a counter electrode.
And the liquid crystal filled between the two substrates 200 and 300.

Then, the first substrate 200 and the second substrate 3
In the case of 00, a certain gap is maintained by a sealing material (not shown) applied along the periphery of the substrate and spacers (not shown) appropriately dispersed. That is, a closed space is formed by the first substrate 200, the second substrate 300, the sealant, and the spacer. In this closed space, for example, TN (Twisted Nematic) type, STN (Sup
er Twisted Nematic) type liquid crystal is enclosed.

In the above liquid crystal panel 100, the data lines 212 and the scanning lines 312 are electrically coupled at the intersections. In particular,
The data line 212 and the scanning line 312 are electrically connected to each other via a series connection of the liquid crystal layer and the TFD element 220.

<Driving Principle> Next, the driving principle of the liquid crystal panel 100 will be described.

The scanning signal applied to the scanning line 312 and the data signal applied to the data line 212 cause the TF
A voltage is applied to the D element 220. When a voltage higher than the threshold value is applied to the TFD element 220, the TFD element 2
20 is turned on, and a predetermined charge is accumulated in the liquid crystal layer connected to the TFD element 220. Then, even after the TFD element 220 is turned off after the charge accumulation, if the resistance of the liquid crystal layer is sufficiently high, the charge accumulation in the liquid crystal layer is maintained. When the amount of charge to be stored is controlled by driving the TFD element 220 on and off in this manner, the alignment state of the liquid crystal changes for each pixel, and predetermined information can be displayed. At this time, the charge may be accumulated in each liquid crystal layer in a part of the period. Therefore, by selecting each scanning line in a time division manner, the data line 212 and the scanning line 31 are selected.
2 can be multiplex driven. Here, the multiplex driving refers to driving common to a plurality of pixels.

(Control Circuit Board) Next, the control circuit board 60
0 will be explained.

As shown in FIG. 1, the control circuit board 600 has a wiring circuit on which various electronic components 620 such as a power supply IC are mounted. And the control circuit board 6
00 is the third terminal group 4 of the flexible wiring board 400
30 has a connection part 610 to be joined.

(Wiring Board for Connection) Next, a flexible wiring board (FPC board) 400 which is a wiring board for connection will be described. In the first embodiment, the flexible wiring board 400 is shown as an example of a connection wiring board. FIG. 4A is a plan view schematically showing the first base member in FIG. FIG. 4B is a plan view schematically showing the second base member in FIG.

The flexible wiring board 400 includes a first base material 412 (see FIG. 4A) and a second base material 416 (see FIG. 4A).
(See (b)). The first base material 412 and the second base material 416 are attached with the wiring 414 interposed therebetween (see FIG. 1). That is, the flexible wiring board 40
Numeral 0 has a laminated structure (three-layer structure) of the first base material 412, the wiring 414, and the second base material 416. This wiring 4
14 is bonded to at least one of the first base material 412 and the second base material 416.

The first and second substrates 412, 416
For example, it is made of a flexible insulating film. Examples of the material of the flexible insulating film include polyimide, polyethylene terephthalate, epoxy resin, and polyester. Examples of the material of the wiring 414 include copper, copper alloy (bronze, brass, beryllium copper, and the like), aluminum, aluminum alloy, gold, and silver.

The flexible wiring board 400 includes a first terminal group 410, a second terminal group 420, and a third terminal group 4.
30. The first terminal group 410 includes the first base material 4
12 and is constituted by the wiring 414 exposed by the absence of the second base material 416. The second terminal group 420 is provided on the second base
Wiring 41 exposed due to the absence of base material 412
4. The third terminal group 430 includes a wiring 414 exposed due to the absence of the first base material 412.
It is composed of

The first terminal group 410 includes the second base material 41
6 does not exist. The first base member 412 does not exist in the second terminal group 420. For this reason, the surface (connection surface) of the first terminal group 410 and the surface (connection surface) of the second terminal group 420 are opposite to each other. as a result,
The flexible wiring board 400 can be connected to the liquid crystal panel 100. That is, the first terminal group 410
The second terminal group 4 connected to the first connection terminal area 202
20 can be connected to the second connection terminal area 302.

The third terminal group 430 is connected to the control circuit board 60
0 (connector) 610.

Each wiring 414 in the first terminal group 410
Corresponds to the shape of each wiring in the first connection terminal region 202. That is, the wirings 414 in the first terminal group 410 have substantially the same shape as the wirings in the first connection terminal area 202.

Each wiring 414 in the second terminal group 420
Corresponds to the shape of each wiring in the second connection terminal region 302. That is, the wirings 414 of the second terminal group 420 have substantially the same shape as the wirings of the second connection terminal area 302.

Each wiring 414 in the third terminal group 430
Corresponds to the shape of each wiring in the terminal of the connection portion 610 of the control circuit board 600. That is, the third
Of the terminal group 430 of the control circuit board 600
Is substantially the same as the shape of the terminal of the connection portion 610 in FIG. And, the third terminal group 430 is the first terminal group 4
Each of the ten terminals has a terminal that conducts one-to-one, and each terminal of the second terminal group 420 has a terminal that conducts one-to-one.

The first to third terminal groups 410, 420,
Each wiring 414 in 430 is formed, for example, by patterning a copper foil.

The electrical connection between the first terminal group 410 and the first connection terminal region 202 is made by using the anisotropic conductive adhesive 50.
1 can be performed. Specifically, the connection is
This can be performed via conductive particles 501a dispersed at an appropriate ratio in the anisotropic conductive adhesive 501 (see FIG. 2). Second terminal group 420 and second connection terminal area 302
Can be electrically connected to the first terminal group 410 and the first connection terminal region 202 in the same manner.

When the first base material 412 is made of polyimide, the first base material 412 can be formed by, for example, the following method. That is, the precursor of the polyimide,
It can be formed by patterning by photolithography and imidizing. The second
Even when the base material 416 is made of polyimide, it can be formed in the same manner as the first base material 412.

[Functions and Effects] The liquid crystal display device 10 according to the first embodiment has the following functions and effects, for example.

The liquid crystal display device 10 according to the first embodiment
According to this, the third terminal group 430 in the flexible wiring board 400 is electrically connected to the first terminal group 410 and the second terminal group 420. For this reason, the third terminal group 43
By simply attaching and detaching the control circuit board 600 to and from the connection portion 610 of the control circuit board 600, the connection and disconnection between the control circuit board 600 and the liquid crystal display panel 100 can be achieved. For this reason, the number of steps of connection and disconnection with the control circuit board can be reduced during inspection, adjustment, various tests, and the like of the liquid crystal panel.

The flexible wiring board 400
Has only one layer of wiring. Therefore, the configuration is simplified. In addition, thinning of the flexible wiring board 400 itself,
Further, the ease of patterning can be improved as compared with the case where the wiring has two or more layers.

[Modification] In the embodiment described above,
Third terminal group 430 is exposed by removing first base material 412. However, the third terminal group 43
Conversely, 0 may be a configuration in which the second base material 416 is removed and formed on the lower surface of the first base material 412.

{Second Embodiment} A connection wiring board according to a second embodiment will be described below. In the second embodiment, an example in which a flexible wiring board (FPC board) is applied as a connection wiring board will be described. FIG.
FIG. 5 is an exploded plan view schematically showing a flexible wiring board according to a second embodiment.

The flexible wiring board 400 has a first flexible wiring board 401 and a second flexible wiring board 402. Each of the first and second flexible wiring boards 401 and 402 is a single-sided flexible wiring board in which wiring is provided on one side of a flexible and insulating base material. First flexible wiring board 401
Is formed by forming a wiring 414 on the surface of a first base material 412. Second flexible wiring board 402
Is formed by forming wirings 414 on the surface of a second base material 416. First and second substrates 412, 416
Is made of, for example, polyimide. The wiring 414 is made of, for example, copper.

The first flexible wiring board 401 has a first terminal group 410 and a fourth terminal group 440.
Each terminal of the fourth terminal group 440 is electrically connected to each terminal of the first terminal group 410 on a one-to-one basis.

The second flexible wiring board 402 has a second terminal group 420, a third terminal group 430, and a fifth terminal group 450. Some terminals of the third terminal group 430 are in one-to-one conduction with the respective terminals of the second terminal group 420. Some of the other terminals of the third terminal group 430 are in one-to-one conduction with the fifth terminal group. The shape of each wiring 414 in the fifth terminal group 450 corresponds to the shape of each wiring 414 in the fourth terminal group 440. As described later, the fourth terminal group 440 and the fifth terminal group 450 Is electrically and mechanically connected by solder or anisotropic conductive adhesive. As a result, some of the other terminals of the third terminal group are electrically connected to the respective terminals of the first terminal group on a one-to-one basis.

If the shapes of the first flexible wiring board 401 and the second flexible wiring board 402 are substantially the same except for the first to third terminal groups 410, 420 and 430, the following advantages can be obtained. Have. That is, the relationship is such that one flexible wiring board becomes a coverlay of the other flexible wiring board. Specifically, one flexible wiring board covers the surface of the other flexible wiring board. Therefore, it is not necessary to provide an insulating layer for protecting the wiring 414.

The first flexible wiring board 401 and the second
Of the fourth terminal group 44
The fifth terminal group 450 and the 0th terminal group 450 are attached to each other so as to be in contact with each other. Therefore, the first terminal group 410 and the third terminal group 4
30 will be conductive.

The first flexible wiring board 401 and the second
The bonding with the flexible wiring board 402 can be performed, for example, as follows.

The surface of the first flexible wiring board 401 on which the wiring 414 is formed is opposed to the surface of the second flexible wiring board 402 on which the wiring 414 is formed. a
The first flexible wiring board 401 and the second flexible
Is aligned with the flexible wiring substrate 402 of FIG. Each terminal of the fourth terminal group 440 and each terminal of the fifth terminal group 450 are electrically connected. This junction, for example,
Soldering and anisotropic conductive adhesive can be performed.

[Effects] According to the configuration of the connection wiring board (flexible wiring board) 400 described above, the effect of reducing the number of steps in the inspection, adjustment, and test of the liquid crystal panel is obtained as in the first embodiment. is there. The flexible wiring board 400 includes two single-sided flexible wiring boards 401,
402. Therefore, the flexible wiring substrate 400 can be manufactured by bonding the two single-sided flexible wiring substrates 401 and 402, so that the flexible wiring substrate 400 is easily manufactured.

Third Embodiment An electro-optical device according to a third embodiment will be described below. The electro-optical device according to the third embodiment is an example applied to an active matrix driving type liquid crystal display device. FIG. 6 is a plan view schematically showing the electro-optical device according to the third embodiment. FIG. 7A is a plan view schematically showing the first base member in FIG. FIG. 7 (b) shows the state in FIG.
It is a top view which shows a 2nd base material typically.

The liquid crystal display device 10 according to the third embodiment
Are the configuration of the liquid crystal display panel 100 and the connection wiring board 4
The second embodiment is different from the first embodiment in the configuration of the first embodiment. That is, the liquid crystal display device 10 according to the third embodiment is different from the first embodiment in that a terminal group for inputting a scanning signal is divided.

(Liquid Crystal Display Panel) The liquid crystal display panel 100 will be described below.

Liquid crystal display panel 1 according to third embodiment
00 differs from the first embodiment in the following points. The second substrate 300 has, on both sides thereof (left and right sides in FIG. 6), protrusions 31 protruding outside the first substrate 200
0a and 310b. That is, the second substrate 300
Has two protruding portions 310a and 310b protruding outward from the first substrate 200. One (left), second
The second connection terminal region 302 is formed on the protruding portion 310 a of the substrate 300. On the other (right side) protruding portion 310b of the second substrate 300, the third connection terminal region 3 is provided.
04 is formed.

In the second connection terminal area 302, a second bare chip 350 is formed. A third bare chip 352 is formed in the third connection terminal area 304.

(Connection Wiring Board) Hereinafter, the connection wiring board 400 will be described.

The connection wiring board 4 according to the third embodiment
00 differs from the first embodiment in that it further includes a sixth terminal group 460. That is, the connection wiring board 400 according to the third embodiment includes the second terminal group 420 and the sixth
And the terminal group 460 supplies a scanning signal. Specifically, the connection wiring board 400 according to the third embodiment includes:
It has the following configuration.

The sixth terminal group 460 includes the first base material 412
Is constituted by the wiring 414 exposed due to the absence of. In the sixth terminal group 460, the first base material 4
Due to the absence of 12, the surface of the sixth terminal group 460 and the surface of the first terminal group 410 are opposite to each other. Therefore, the sixth terminal group 460 can be electrically connected to the third connection terminal region 304.

Each wiring 414 in the sixth terminal group 460
The shape of each wiring 4 in the third connection terminal region 304
14 shape. That is, the sixth terminal group 4
Each wiring 414 in 60 is connected to the third connection terminal region 30.
4 has substantially the same shape as each wiring 414.

The electrical connection between the sixth terminal group 460 and the third connection terminal area 304 is made according to the first terminal group 410 and the first connection terminal area 202 described in the first embodiment.
In the same manner as the electrical connection with

(Effects) According to the liquid crystal display device 10 described above, similarly to the first embodiment, there is an effect of reducing the number of steps in the inspection, adjustment, and test of the liquid crystal panel. In addition, according to the liquid crystal display device 10 described above, for example, the scanning signals of the even rows can be supplied to the second bare chip 350, and the scanning signals of the odd rows can be supplied by the third bare chip 352.

(Modification) The liquid crystal display device 10 according to the third embodiment can be modified as follows, for example.

The liquid crystal display device 10 according to the third embodiment
May be a form in which a terminal group for inputting a data signal is divided. That is, the function of the first terminal group 410 may be divided to obtain the sixth terminal group. Specifically, the liquid crystal display device 10 according to the third embodiment may have the following configuration.

Forming connection terminal areas of first substrate 200 on both upper and lower sides, and supplying data signals to bare chips provided in respective connection terminal areas by first terminal group and sixth terminal group It is. In this case, for example, an even-numbered data signal is supplied to the bare chip at the sixth terminal group,
Can supply the odd-numbered column data signals to the bare chip.

{Fourth Embodiment} An electronic apparatus according to a fourth embodiment will be described below. The electronic apparatus according to the fourth embodiment is an example to which the electro-optical device according to the invention is applied. Specifically, an example of an electronic apparatus using a liquid crystal device as an electro-optical device according to the invention will be described.

(1) Projector First, a projector using this liquid crystal device as a light valve will be described. FIG. 8 is a plan view showing a configuration example of the projector.

Inside the projector 1100, a lamp unit 1102 including a white light source such as a halogen lamp is provided. The projection light emitted from the lamp unit 1102 is separated into three primary colors of RGB by four mirrors 1106 and two dichroic mirrors 1108 arranged in the light guide 1104. The projection light separated into the three primary colors is incident on liquid crystal panels 1110R, 1110B and 1110G as light valves corresponding to the respective primary colors. Hereinafter, the liquid crystal panel 1110
R, 1110B and 1110G are collectively referred to as “liquid crystal panel 1110”.

Each of the liquid crystal panels 1110 is constituted by the liquid crystal panel described above. LCD panel 1110
Each has a bare chip (not shown) mounted thereon and a connection wiring board (not shown) connected thereto.
Each of the liquid crystal panels 1110 is driven by the R, G, and B primary color signals supplied from the image signal processing circuit connected to the connection wiring board.

The light modulated by the liquid crystal panel 1100 enters the dichroic prism 1112 from three directions. In the dichroic prism 1112, the R and B lights are refracted at 90 degrees, while the G light travels straight. Therefore, as a result of combining the images of each color, a color image is projected on a screen or the like via the projection lens 1114.

Light corresponding to the primary colors of R, G, and B is incident on each of the liquid crystal panels 1110 by the dichroic mirror 1108. Therefore, the liquid crystal panel 1
It is not necessary to provide a color filter on 100 substrates.

(2) Digital Still Camera Next, a digital still camera using this liquid crystal display device as a finder will be described. FIG. 9 is a perspective view showing the configuration of the digital still camera. Note that FIG. 9 also briefly shows connection with an external device.

A normal camera exposes a film with a light image of a subject. However, digital still camera 1
Reference numeral 200 denotes a CCD (Charge Coupled Dev)
An image pickup signal is generated by photoelectric conversion by an image pickup device such as ice). Here, the liquid crystal panel 1 described above is provided on the back of the case 1202 in the digital still camera 1200.
00 is provided. The liquid crystal panel 100 is configured to perform display based on an imaging signal from a CCD. Therefore, the liquid crystal panel 100 functions as a finder for displaying the subject. An optical lens or a CC is provided on the front side (the rear side in FIG. 9) of the case 1202.
A light receiving unit 1204 including D and the like is provided.

Here, when the photographer confirms the subject image displayed on the liquid crystal panel 100 and presses the shutter button 1206, the image pickup signal of the CCD at that time is transferred and stored in the memory of the circuit board 1208. . In the digital still camera 1200, a video signal output terminal 1212 and a data communication input / output terminal 1214 are provided on the side surface of the case 1202.
As shown in FIG. 9, a television monitor 1300 is connected to the former video signal output terminal 1212 as necessary, and the latter is a data input / output terminal 1212 for data communication.
14 is connected to a personal computer 1400. Further, by a predetermined operation, the imaging signal stored in the memory of the circuit board 1208 is transmitted to the television monitor 1300.
And output to the personal computer 1400.

(3) Cellular Phone and Other Electronic Equipment FIGS. 10A, 10B and 10C show examples of other electronic equipment using a liquid crystal display device as the electro-optical device according to the present invention. FIG. FIG. 10A shows a mobile phone 3000 having a liquid crystal display 100
0 is provided. FIG. 10B 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. 10C illustrates a portable information device 5000 including a display portion including a liquid crystal display device 1000 and an input portion 5100.

[0107] These electronic devices are used in the liquid crystal display device 100.
In addition to 0, although not shown, for example, a display information output source, various circuits such as a display information processing circuit and a clock generation circuit, and a display signal generation unit including a power supply circuit for supplying power to those circuits. . 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, mini-disc 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.

{Modifications} The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention. For example, the present invention allows, for example, the following modifications.

(1) In the above embodiment, an example in which the electro-optical device according to the present invention is applied to a liquid crystal display device of an active matrix driving system has been described. However, the application of the electro-optical device according to the present invention is not limited to an active matrix drive type liquid crystal display device, but may be a passive matrix drive type liquid crystal display device.

Hereinafter, a liquid crystal display device of a passive matrix drive system will be described. FIG. 11 is a plan view showing the overall configuration of a passive matrix drive type liquid crystal display device, in which the connection wiring substrate described in the first embodiment is connected to a passive matrix drive type liquid crystal panel.

The passive matrix driving type liquid crystal display device 10 is different from the active matrix driving type liquid crystal display device in that there is no switching element. The other points are substantially the same as those of the active matrix driving type liquid crystal display device. Hereinafter, the liquid crystal display device 10 of the passive matrix driving method will be described more specifically. Descriptions of the reference numerals indicating substantially the same configuration as in the first embodiment are omitted.

A plurality of data lines 212 are provided on the surface of the first substrate 200 which faces the second substrate 300 (hereinafter, this surface is referred to as the “facing surface of the first substrate”). They are arranged in parallel. The data line 212 is made of a conductive material having transparency to display light, for example, ITO (Indium).
Tin Oxide). These data lines 21
2 is along a predetermined direction (X direction in FIG. 11),
They are arranged at a predetermined interval from each other. On the other hand, a surface of the second substrate 300 that faces the first substrate 200 (hereinafter, this surface is referred to as a “facing surface of the second substrate”).
, A plurality of scanning lines 312 are arranged. These scanning lines 312 are formed of a conductive material that reflects display light or a conductive material such as ITO that is transparent to display light. These scanning lines 312 are arranged in parallel in a predetermined direction (Y direction in FIG. 11) at a predetermined interval from each other. That is, the plurality of data lines 212 formed on the first substrate 200 and the plurality of scanning lines 312 formed on the second substrate 300 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 flexible wiring board connected to the passive matrix drive type liquid crystal panel is not limited to the board described in the first embodiment, but may be the connection wiring board described in the second or third embodiment. May be used.

(2) In the above embodiment, one bare chip is provided on each substrate of the electro-optical panel.
That is, a total of two bare chips were provided on the electro-optical panel. However, the present invention is not limited to this, and three or more bare chips may be mounted according to the driving capability, the number of scanning lines, or the number of data lines.

[Brief description of the drawings]

FIG. 1 is a plan view showing an overall configuration of a liquid crystal display device.

FIG. 2 is a cross-sectional view schematically showing a cross section taken along line AA in FIG.

FIG. 3 is a partially broken perspective view schematically showing a part of the liquid crystal panel.

FIG. 4A is a plan view schematically showing a first base member in FIG. FIG. 3B is a plan view schematically illustrating a second base member in FIG. 2.

FIG. 5 is an exploded plan view schematically showing a flexible wiring board according to a second embodiment.

FIG. 6 is a plan view schematically showing an electro-optical device according to a third embodiment.

FIG. 7A is a plan view schematically showing a first base member in FIG. FIG. 7B is a plan view schematically illustrating a second base member in FIG. 6.

FIG. 8 is a plan view illustrating a configuration example of a projector.

FIG. 9 is a perspective view showing a configuration of a digital still camera.

FIG. 10A is an external view showing a mobile phone,
(B) is an external view showing a wristwatch, and (C) is an external view showing a portable information device.

FIG. 11 is a plan view showing the overall configuration of a passive matrix drive type liquid crystal display device.

[Explanation of symbols]

 Reference Signs List 10 liquid crystal display device 100 liquid crystal panel 200 first substrate 202 first connection terminal region 210 protrusion 212 data line 220 TFD element 234 pixel electrode 300 second substrate 302 second connection terminal region 304 third connection terminal region 310, 310a, 310b Projecting portion 312 Scan line 250 First bare chip 350 Second bare chip 352 Third bare chip 400 Wiring board for connection (flexible wiring board) 401 First flexible wiring board 402 Second flexible wiring board 412 First base material 414 Wiring 416 Second base material 410 First terminal group 420 Second terminal group 430 Third terminal group 440 Fourth terminal group 450 Fifth terminal group 460 Sixth terminal group 500 , 501 Anisotropic conductive adhesive 600 Control circuit board 610 Connection 62 Electronic components

Claims (17)

[Claims] 1. A wiring board for connecting an electro-optical panel, which is connected to an electro-optical panel having a pair of opposing substrates, comprising: a first base material; and a second base material. A first terminal group provided on the first base material; a second terminal group provided on the second base material; provided on the first base material or the second base material. And a third terminal group, wherein the third terminal group includes at least a terminal conducting to the first terminal group and a terminal conducting to the second terminal group. Wiring board for panel connection. 2. The wiring board for connecting an electro-optical panel according to claim 1, wherein at least part of the wiring board has a laminated structure including the first base material, the wiring, and the second base material. . 3. The wiring for connection of an electro-optical panel according to claim 1, wherein the connection surface of the first terminal group and the connection surface of the second terminal group are opposite to each other. substrate. 4. The wiring substrate for an electro-optical panel according to claim 1, wherein the first terminal group is exposed due to the absence of the second base. 5. The wiring board for connecting an electro-optical panel according to claim 1, wherein the second terminal group is exposed due to the absence of the first base member. 6. The wiring board for connecting an electro-optical panel according to claim 1, wherein the first and second substrates are made of a flexible insulating film. 7. The wiring for connecting an electro-optical panel according to claim 1, wherein the wiring is made of a material mainly containing any of copper, copper alloy, aluminum, aluminum alloy, gold, and silver. substrate. 8. The wiring board for connecting an electro-optical panel according to claim 1, wherein the wiring in the first terminal group and the wiring in the second terminal group are in the same layer. 9. The second base material according to claim 1, wherein the first base material is further provided with a fourth terminal group that is electrically connected to the first terminal group. Is further provided with a fifth terminal group that is electrically connected to the third terminal group, wherein the fifth terminal group is electrically connected to the fourth terminal group. 10. The wiring board for connecting an electro-optical panel according to claim 1, further comprising a sixth terminal group that is electrically connected to the third terminal group. 11. The shape of the first base material and the shape of the second base material according to any one of claims 1 to 10,
A wiring board for connecting an electro-optical panel, which has substantially the same shape except for the terminal groups. 12. An electro-optical device including an electro-optical panel having a first substrate and a second substrate facing each other, wherein the first substrate does not overlap with the second substrate. A first connection terminal region, wherein the second substrate has a second connection terminal region that does not overlap with the first substrate, the first connection terminal region and the second connection The terminal region is electrically connected to the connection wiring board of the electro-optical panel according to any one of claims 1 to 12, wherein the first terminal group is electrically connected to the first connection terminal region. The electro-optical device, wherein the second terminal group is electrically connected to the second connection terminal region. 13. The electro-optical device according to claim 12, wherein the electro-optical device further has a control circuit board, and the control circuit board and the third terminal group are electrically connected. 14. The connection according to claim 12, wherein the first terminal group is connected to the first connection terminal region.
An electro-optical device, wherein at least one of the connection between the second terminal group and the second connection terminal region is made with an anisotropic conductive adhesive. 15. The electro-optical device according to claim 12, wherein the electro-optical device is a liquid crystal device. 16. The semiconductor device according to claim 12, wherein a semiconductor device for driving an electro-optical device is mounted on at least one of the first connection terminal region and the second connection terminal region. Electro-optical device. 17. An electronic apparatus comprising the electro-optical device according to claim 12.