JP2001117504A - Electro-optical device - Google Patents

Abstract

(57) [Problem] To provide an electro-optical device which has a very small thickness in a vertical direction and can be formed by a simple operation. SOLUTION: Terminal portions 27 of flexible substrates 22a and 22b.
This is an electro-optical device having a board connection structure formed by connecting terminals a and 27b and terminal portions 31a and 31b of the control board 9.
It has anisotropic conductive connectors 36a and 36b in which a plurality of conductive materials 39 are arranged at intervals from each other, and a part of the surfaces of the anisotropic conductive connectors 36a and 36b on which the conductive material 39 is provided. Terminal portions 27a, 2 of flexible substrates 22a, 22b
7b, and the terminal portion 3 of the control board 9 is mounted on another part of the same surface.
1a and 31b are placed, and the flexible boards 22a and 22b and the control board 9 are pressed against the anisotropic conductive connectors 36a and 36b to electrically connect the terminals. Since the connection is in the same plane, the thickness in the vertical direction is very small.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a substrate connection structure in an electro-optical device for displaying an image such as a character or a number.

[0002]

2. Description of the Related Art At present, liquid crystal devices are widely used in electronic devices such as portable telephones and portable information terminals. This liquid crystal device is an example of an electro-optical device.
It is used to display images such as letters, numbers, and figures.

In a liquid crystal device, in general, by controlling the voltage applied to the liquid crystal to control the orientation of the liquid crystal, light passing through the liquid crystal is modulated, thereby displaying an image such as a character, a numeral, or a figure. . In this liquid crystal device, a circuit board for controlling a voltage applied to the liquid crystal is connected to one or both of a pair of substrates holding the liquid crystal. In this case, the circuit board is not limited to a single board, but may be formed by connecting a plurality of boards to each other.

As a conventional structure for connecting a plurality of substrates to each other, for example, as shown in FIG. 6, respective terminal portions 57a and 57 of a pair of substrates 52a and 52b are provided.
7b are arranged to face each other, and the terminal portions 57a and 57b
There is known a connection structure in which the conductive connection is made.

[0005] Appropriate circuits (not shown) are provided on the substrates 52a and 52b, and these circuits are electrically connected to the terminal portions 57a and 57b. Further, the rubber connector 56 is formed by embedding a plurality of conductive members 54 at an interval from each other in a base portion 55 made of, for example, an insulating rubber, and connecting both ends of the conductive member 54 to a pair of terminal portions 57.
By making contact with a and 57b, a conductive connection between them is achieved.

[0006]

However, in the above-mentioned conventional substrate connection structure, the thickness in the vertical direction indicated by the arrow Z is large, and therefore, in the conventional liquid crystal device using this substrate connection structure, the external shape is small. There was a problem that can not be. As a board connection structure to avoid an increase in the thickness in the vertical direction, a structure in which the terminals of a pair of boards are electrically connected by soldering in a state where the terminals of the pair of boards are arranged in a plane can be considered, but the soldering process requires work. There is a problem that it is complicated and time-consuming.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide an electro-optical device which has a very small vertical thickness and can be formed by a simple operation. I do.

[0008]

Means for Solving the Problems (1) In order to achieve the above object, an electro-optical device according to the present invention comprises a plurality of flexible substrates electrically connected to a substrate of an electro-optical element. In an electro-optical device having a control board electrically connected to the plurality of flexible boards via an anisotropic conductive connector, the anisotropic conductive connector includes a plurality of conductive boards arranged at intervals from each other. Material is provided on at least one surface, and the terminal portion of the flexible substrate and the terminal portion of the control substrate are placed on the one surface of the anisotropic conductive connector to achieve the flexibility. It is characterized in that the board and the control board are electrically connected.

According to the electro-optical device of the present invention, the flexible board and the control board can be electrically connected on the same surface of the anisotropic conductive connector. Therefore, the thickness of the conductive connection portion in the vertical direction can be extremely reduced.

Also, the terminal portion of the flexible board and the terminal portion of the control board are connected together by an anisotropic conductive connector,
Since a troublesome operation such as soldering is not required, the operation can be performed easily and in a short time.

(2) In the electro-optical device according to the above (1), as shown in FIG. 4, the anisotropic conductive connector includes a plurality of conductive materials 39 on a surface of a base 38 having elasticity.
Are preferably arranged at intervals D from each other. The conductive material 39 can be formed by, for example, a thin gold wire. The interval D can be set to various dimensions according to the purpose of use, for example, 0.01 μm to 0.5 μm, preferably 0.1 μm to 0.5 μm.
It can be set to 05 μm to 0.2 μm. According to the configuration described in (2), the terminals are connected to each other by the conductive material 39 by the elastic force generated by the elasticity of the base 38, that is, the restoring force.
The conductive connection can be surely performed through.

(3) In the electro-optical device according to the above item (2), the electro-optical element and the control board are arranged so as to overlap with each other via a support member for supporting the anisotropic conductive connector, Desirably, the anisotropic conductive connector is pressed against the control board by the support member. By doing so, the control board and the flexible board are pressed against the anisotropic conductive connector by the pressure applied between the support member and the control board, so that the electrical connection can be ensured. Further, the pressure applied between the support member and the control board fixes the anisotropic conductive connector at a predetermined position.

(4) In the case of the above (3), it is preferable that the support member has a pin for positioning, and the flexible substrate and the control substrate are commonly positioned by the pin.

In this case, the terminals of the flexible board and the terminals of the control board can be accurately conductively connected without shifting each other, and the operation for that can be simplified.

(5) In the electro-optical device according to the above (4), it is preferable that the support member has a concave portion and the anisotropic conductive connector is accommodated in the concave portion. With this configuration, the work can be continued in a state where the anisotropic conductive connector is accommodated in the concave portion, so that the workability for conductive connection can be further simplified.

[0016]

FIG. 1 shows an embodiment of an electro-optical device according to the present invention. In the electro-optical device according to the present embodiment, a liquid crystal device using a liquid crystal panel having a liquid crystal sandwiched between a pair of substrates facing each other as an electro-optical element will be described as an example. The liquid crystal device 1 shown here has a liquid crystal panel 2 on a spacer sheet 8 of a support member 3 in which a flat light guide 6, a sheet-like light diffusion plate 7, and a frame-like spacer sheet 8 are sequentially assembled. A non-flexible PCB (Printed Ci
The liquid crystal panel 2, the support member 3, and the PCB 9 are covered with a cover 11, and the lower end of the cover 11 is crimped to the back surface of the PCB 9.

The cover 11 has an opening at a portion corresponding to the display area of the liquid crystal panel 2, and an image displayed on the liquid crystal panel 2 can be recognized from the outside through the opening. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1 and shows a cross-sectional structure of the liquid crystal device 1 configured as described above.

In FIG. 2, the liquid crystal panel 2 has a first liquid crystal panel substrate 4a and a second liquid crystal panel substrate 4b, which are a pair of substrates facing each other. Joined.

On the surface of the substrate material 13a constituting the first liquid crystal panel substrate 4a facing the second liquid crystal panel substrate 4b,
For example, a first electrode 14a acting as a common electrode is formed in a predetermined pattern, and an overcoat layer 16
is formed, and an alignment film 17a is further formed thereon. A polarizing plate 18a is provided on the outer surface of the substrate material 13a.
Is affixed.

A second electrode 14b acting as a segment electrode, for example, is provided on a surface of the substrate material 13b of the second liquid crystal panel substrate 4b facing the first liquid crystal panel substrate 4a facing the first liquid crystal panel substrate 13a. The overcoat layer 16b is formed thereon, and the alignment film 17b is further formed thereon. Also,
A polarizing plate 18b is attached to the outer surface of the substrate material 13b.

A rubbing process is performed on each of the alignment films 17a and 17b so as to have an orientation. Further, the polarization axis of the polarizing plate 18a and the polarization axis of the polarizing plate 18b are opposed to each other at a predetermined angle in order to obtain the polarization transmittance required for displaying a visible image. When performing color display, a color filter (not shown) is provided on the first liquid crystal panel substrate 4a or the second liquid crystal panel substrate 4b.
Is provided.

The first electrode 14a and the second electrode 14b are formed of a light transmitting material such as ITO (Indium Tin Oxide) to a thickness of about 1000 angstroms, and the overcoat layers 16a and 16b are made of, for example, silicon oxide. 80 with titanium oxide or a mixture thereof
The alignment films 17a and 17b are formed to a thickness of about 800 angstroms using, for example, a polyimide resin.

As shown in FIG. 1, the first electrode 14a is formed in a so-called stripe shape by arranging a plurality of linear patterns in parallel with each other, while the second electrode 14b crosses the first electrode 14a. By arranging a plurality of linear patterns in parallel to each other as described above, they are also formed in a stripe shape. A plurality of points where the electrodes 14a and the electrodes 14b intersect in a dot matrix form pixels for displaying an image. The area defined by the plurality of pixels is a display area for displaying an image such as a character.

As shown in FIG. 2, a plurality of spacers 19 are dispersed on one of the liquid crystal side surfaces of the first liquid crystal panel substrate 4a and the second liquid crystal panel substrate 4b formed as described above. Further, a sealing material 12 is provided in a frame shape on the liquid crystal side surface of one of the substrates by, for example, printing or the like.

A spacer 19 is provided between the substrates 4a and 4b.
A liquid crystal 21 is formed in the cell gap through a liquid crystal filling port (not shown) formed in a part of the sealing material 12. After the injection is completed, the liquid crystal injection port is sealed with a resin or the like.

In FIG. 1, the first liquid crystal panel substrate 4a has a substrate overhanging portion 4c projecting outside the second liquid crystal panel substrate 4b, and the first electrode 14 on the first liquid crystal panel substrate 4a.
“a” directly extends to the substrate overhang portion 4c and serves as a connection terminal. In addition, the second liquid crystal panel substrate 4b has a substrate overhang 4d projecting outside the first liquid crystal panel substrate 4a, and the second electrode 14b on the second liquid crystal panel substrate 4b extends directly to the substrate overhang 4d. It comes out and becomes a connection terminal.

In practice, a large number of electrodes 14a and 14b are formed at very small intervals over almost the entire surface of each of the substrates 4a and 4b, but in FIG. These electrodes and the like are schematically illustrated at wider intervals, and some of the electrodes are not illustrated. Further, the electrodes 14a and 14b are not limited to being formed in a stripe shape, that is, in a straight line shape, and may be formed in an appropriate pattern shape.

In FIG. 1, a first flexible substrate 22a is connected to a substrate extension 4c of a first liquid crystal panel substrate 4a. The first flexible substrate 22a is
And TCP (Tape Carrier Package) connected to it
24, and the heat seal 23 is connected to the substrate overhang portion 4c.

The heat seal 23 is a flexible wiring board having an electrical and mechanical connection function, which is formed by coating a resin for thermocompression bonding on a polymer film on which a wiring pattern is formed, for example, a polyester film. .

The TCP 24 is a TAB (Tape Automated).
This is a flexible wiring board formed by connecting IC chips on a flexible carrier tape collectively by gang bonding or the like using the technology of ated bonding (automated tape mounting). In the present embodiment, this TCP
A liquid crystal driving IC 26a is bonded to the back surface of the substrate 24, and a terminal 27a is formed at an edge of the liquid crystal driving IC 26a. Further, positioning holes 28a are formed on both sides of the terminal portion 27a.

Substrate overhang 4 of second liquid crystal panel substrate 4b
To d, a TCP 22b as a second flexible substrate is connected. A liquid crystal driving IC 26 is provided on the back surface of the TCP 22b.
b is bonded, and a terminal 27
b is formed. In addition, positioning holes 28b are formed on both sides of the terminal portion 27b.

The TCP 22 as the second flexible substrate
In FIG. 1B, a wiring pattern for connecting the terminal of the liquid crystal driving IC 26b, that is, the bump, to the terminal portion 27b, a wiring pattern for connecting the bump of the liquid crystal driving IC 26b, and the second electrode 14b, and the like are formed. So for convenience,
Illustration of those wiring patterns is omitted.

Each of the heat seal 23 and the TCP 24 forming the first flexible substrate 22a has a wiring pattern for connecting the bump of the liquid crystal driving IC 26a and the terminal portion 27a and the bump of the liquid crystal driving IC IC 26a and the first.
Although a wiring pattern for connecting to the electrode 14a is formed, the wiring pattern is not shown in FIG. 1 for convenience.

In FIG. 1, a PCB 9 as a control board
A plurality of LEs as light emission sources
A D (Light Emitting Diode) 29 is provided, and a concave portion 30 for accommodating the LEDs 29 is provided at a corresponding portion of the support member 3. The concave portion 30 has an opening at a portion corresponding to the side surface of the light guide 6. When the PCB 9 is mounted on the lower surface of the support member 3, the LED 29 is accommodated in the concave portion 30, and the light emitting surface of the LED 29 is guided. The side surfaces of the light body 6 face each other through the opening. Thus, the light emitted from the LED 29 can be guided to the inside of the light guide 6 through the side surface of the light guide 6.

A terminal 31a and a terminal 31b are provided at appropriate positions on the surface of the PCB 9 on the support member 3 side. Further, positioning holes 3 are provided on both sides of the terminal portion 31a.
2a are provided, and positioning holes 32b are provided on both sides of the terminal portion 31b.

Each of the liquid crystal driving ICs 26
a, a circuit to assist 26b is mounted, LE
A circuit for driving the D29 is mounted, or a circuit required for an electronic device using the present liquid crystal device 1 is mounted. These circuits are, for example, PCB9 in FIG. Is mounted on the surface opposite to the supporting member 3. And those circuits and the terminal part 3
1a and 31b are electrically connected via a through hole or the like.

FIG. 3 shows the support member 3 according to the arrow A in FIG.
Of the liquid crystal panel 2 according to the arrow B. On the back surface of the support member 3, the liquid crystal panel 2
Is provided with a shallow recess 33 for accommodating the first flexible substrate 22a connected thereto, and a recess 34 for accommodating the liquid crystal driving IC 26a. Also, the recess 33
Is provided with an anisotropic conductive connector 36a at a part of its tip.

The anisotropic conductive connector 36a is adhered or adhered to the support member 3 by, for example, an adhesive or an adhesive, or is mechanically supported by the support member 3 by a hook-shaped projection or the like. At this time, the anisotropic conductive connector 36a
It is preferable that a recess for accommodating the connector 36a is formed in a corresponding portion of the support member 3 in advance in order to securely hold the connector 36a.

Further, at the other portion of the back surface of the support member 3, the second
A shallow concave portion 37 for accommodating the TCP 22b as a flexible substrate is provided, and a concave portion 40 for accommodating the liquid crystal driving IC 26b is provided. An anisotropic conductive connector 36b is provided at a part of the tip of the concave portion 37. The anisotropic conductive connector 36b is also supported by the support member 3 by adhesion, adhesion, mechanical support, or the like.
At this time, it is desirable that a concave portion for securely holding the anisotropic conductive connector 36b is formed in a corresponding portion of the support member 3 in advance.

The above-described anisotropic conductive connectors 36a and 36
b is, for example, an elastic base 3 as shown in FIG.
8 are formed by arranging a plurality of conductive materials 39, for example, conductive wires, for example, gold wires at a distance D from each other. These anisotropic conductive connectors 36a and 36b
Is mounted such that the base 38 comes to the support member 3 side so that the conductive material 39 faces outward.

A pair of pins 41a are provided on both sides of the anisotropic conductive connector 36a on the back surface of the support member 3, and a pair of pins 41b are provided on both sides of the anisotropic conductive connector 36b.

In manufacturing the present liquid crystal device 1, the light guide 6, the light diffusing plate 7 and the spacer sheet 8 are sequentially mounted on the support member 3 in FIG. Place panel 2. At this time, as shown in FIG. 2, an air layer corresponding to the thickness of the spacer sheet 8 is formed between the polarizing plate 18b and the light diffusing plate 7 of the liquid crystal panel 2, so that the polarizing plate 18b The close contact with the plate 7 is prevented, so that the quality of the liquid crystal display by the liquid crystal panel 2 can be favorably maintained.

Further, as shown in FIG.
Is bent toward the back surface of the support member 3, and the positioning holes 28a are inserted into the pins 41a. Thereby, as shown in FIG. 2, the TC of the first flexible substrate 22a is
The terminal portion 27a of P24 is positioned at a part on the near side (left side in FIG. 2) of the anisotropic conductive connector 36a.

Next, in FIG. 3, a TCP 22b as a second flexible substrate constituting the liquid crystal panel 2 is supported by a support member 3.
And the positioning hole 28b is inserted into the pin 41b.
Insert into As a result, similarly to the case of the first flexible substrate 22a, the terminal portion 27b of the TCP 22b is positioned at a part on the near side of the anisotropic conductive connector 36b.

Next, in FIG. 3, P as a control board
The positioning hole 32a of the CB 9 is inserted into the pin 41a of the support member 3.
While simultaneously inserting the positioning holes 32b of the PCB 9 into the pins 41b of the support member 3 and connecting the PCB 9 to the back surface of the support member 3 and the bent first flexible substrate 2
2a and the TCP 22b as the second flexible substrate.

At this time, the terminal 31a on the PCB 9
As shown in FIG. 2, the terminal portion 27 of the first flexible substrate 22a
a is positioned so as to correspond to the remaining part of the same surface as the surface of the anisotropic conductive connector 36a with which a contacts. On the other hand, in FIG. 3, the other terminal portions 31b on the PCB 9 are:
The terminal portion 27b of the TCP 22b, which is the second flexible substrate, is positioned so as to correspond to the remaining part of the same surface as the surface of the anisotropic conductive connector 36b that contacts.

Thereafter, as shown in FIG. 2, the entire liquid crystal panel 2, the support member 3, and the PCB 9 are covered with a cover 11, and a proper portion of the bottom (lower portion in FIG. 2) of the peripheral wall of the cover 11 is placed on the back of the PCB 9. Fold it out and stop it. As a result, in FIG.
The terminal portion 31a of B9 and the terminal portion 27a of the first flexible board 22a are pressed by the PCB 9 to the anisotropic conductive connector 36a with an appropriate pressure. As a result, due to the restoring force or elastic force of the base 38 of the anisotropic conductive connector 36a, the PCB 9, that is, the terminal portion 31a of the control board and the terminal portion 27a of the first flexible board 22a are connected to the terminal portion 27a of the anisotropic conductive connector 36a. Conductive connection is made via conductive material 39.

On the other hand, in FIG. 3, the other anisotropic conductive connector 36b is the same as the case of the above-described anisotropic conductive connector 36a, ie, the PCB 9, ie, the terminal portion 31b of the control board and the second flexible connector 36b. TCP2 as substrate
2b is electrically connected to the terminal 27b via the conductive material 39 on the same surface of the anisotropic conductive connector 36b.

The above-described conductive connection using the anisotropic conductive connectors 36a and 36b
6a and 36b, the vertical dimension of this conductive connection portion, that is, the vertical dimension in FIG. 2, can be made very small, and therefore the vertical dimension of the overall appearance of the liquid crystal device 1 can be reduced. Can be formed very small.

FIG. 5 shows a conductive connection structure using an anisotropic conductive connector 36a according to the line VV in FIG. As shown in the figure, a plurality of terminal portions 31a on the PCB 9 serving as a control board and a plurality of terminal portions 27a on the TCP 24 constituting the first flexible board 22a share a plurality of conductive materials 39 in the embodiment. , Thereby achieving a planar conductive connection between the pair of terminal portions 31a and 27a.

In the liquid crystal device 1 formed as described above, in FIG. 1, light is supplied from the light emitting surface of the light guide 6 to the liquid crystal panel 2 when the LED 29 emits light. Further, the liquid crystal driving ICs 26a and 26b are driven by a circuit mounted on the PCB 9 to operate, and apply a scanning voltage to either one of the first electrode 14a or the second electrode 14b for each row, and furthermore, By applying a data voltage based on a display image to the other of the electrodes for each pixel, light passing through each pixel portion selected by the application of both voltages is modulated, and thus the liquid crystal display surface of the liquid crystal panel 4 is modulated. Images such as letters and numbers are displayed on the side.

As described above, according to the present embodiment, the first
Terminal 27a of flexible substrate 22a and PC as control substrate
Both of the terminal portions 31a of B9 are connected to the anisotropic conductive connector 36a.
, The terminal 27a of the first flexible board 22a and the terminal 31a of the PCB 9 are conductively connected to each other via the conductive material 39 of the anisotropic conductive connector 36a. At this time, the terminal portion 2 of the first flexible substrate 22a is
7a and the terminal portion 31a of the PCB 9 are anisotropic conductive connectors 3
Since the conductive connection is made via the same surface of 6a, the vertical thickness of the conductive connection portion can be made very small.

The conductive connection relationship is such that the terminal portion 27b of the TCP 22b as the second flexible board and the terminal portion 31b of the PCB 9 as the control board are connected to the anisotropic conductive connector 36b.
The same is achieved in the case of conductive connection.

Further, the terminal portion 2 of the first flexible substrate 22a
7a and the terminal portion 31a of the PCB 9 are collectively connected by an anisotropic conductive connector 36a, and the terminal portion 27b of the TCP 22b as a second flexible substrate and the terminal portion 31b of the PCB 9 are connected to the anisotropic conductive connector 36b. Thus, both connecting portions do not require a troublesome operation such as soldering, so that the operation can be performed easily and in a short time.

Further, in this embodiment, the anisotropic conductive connectors 36a and 36b are formed by arranging a plurality of conductive materials 39 formed of gold wires or the like on the surface of an elastic base 38 as shown in FIG. As a result, the terminals can be reliably electrically conductively connected to each other via the conductive material 39 by the elastic force generated by the elasticity of the base 38, that is, the restoring force.

In this embodiment, the pins 41a, 41a are attached to the support member 3 for supporting the anisotropic conductive connectors 36a, 36b.
After the first flexible substrate 22b is provided, the combination of the first flexible substrate 22a and the control substrate PCB9 and the combination of the second flexible substrate TCP22b and the control substrate PCB9 are combined with the pins 41a. , 41b
The terminal 27a of the first flexible substrate 22a and the terminal 31a of the PCB 9
And terminal portion 27b of TCP 22b as a second flexible substrate
And the terminal portions 31b of the PCB 9 can be accurately and conductively connected without shifting, and the work for that can be easily performed.

As described with reference to FIG. 3, in the support member 3, at the position where the anisotropic conductive connectors 36a and 36b are to be arranged, a concave portion for accommodating and positioning those connectors is provided. The member 3 can be provided in advance. In this case, the anisotropic conductive connectors 36a, 36b
Can be determined accurately, so that the workability for conductive connection can be further simplified.

In this embodiment, the support member 3 supports the anisotropic conductive connectors 36a and 36b on one side, supports the control board PCB 9 on the same side, and the liquid crystal panel on the opposite side. 2 was supported. Further, the TCP 22b as the first flexible substrate 22a and the TCP 22b as the second flexible substrate is bent to the back side of the support member 3 so that their terminal portions 27a and 27b are connected to the anisotropic conductive connector 36.
a, terminal part 3 of PCB 9 which is a control board via 36b
1a and 31b. With this configuration, circuits required for the liquid crystal device 1 can be stored in a structure having an area approximately equal to the area of the liquid crystal panel 2 and a small vertical dimension.

(Other Embodiments) The present invention has been described with reference to the preferred embodiments. However, the present invention is not limited to the embodiments, and various modifications may be made within the scope of the invention described in the claims. Can be modified.

For example, the anisotropic conductive connector used in the present invention is not limited to the structure shown in FIG. 4, but has a structure having conductivity in a specific direction and no conductivity in other directions.
That is, if the connector has a structure having anisotropic conductivity,
Any structure can be adopted. For example, a so-called spring connector having a structure in which a plurality of conductive wires formed of an elastic material are arranged at intervals from each other can be used.

The electro-optical device of the present invention uses not only a liquid crystal panel but also a light-emitting element such as an electroluminescence (EL), a plasma display panel (PDP), and a field emission display (FED) as an electro-optical element. It can also be applied to things.

[0062]

According to the electro-optical device of the present invention, the terminal portion of the flexible substrate and the terminal portion of the control substrate are both pressed against the same surface of the anisotropic conductive connector, so that the anisotropic conductive connector is provided. The terminal portion of the flexible board and the terminal portion of the control board are conductively connected to each other via the conductive material. At this time, since the terminal portion of the flexible board and the terminal portion of the control board are conductively connected via the same surface of the anisotropic conductive connector, the vertical thickness of the conductive connecting portion can be extremely reduced.

The terminals of the flexible board and the terminals of the control board are connected together by an anisotropic conductive connector.
Since a troublesome operation such as soldering is not required, the operation can be performed easily and in a short time.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a liquid crystal device according to the present invention.

FIG. 2 is a cross-sectional view illustrating a cross-sectional structure of the liquid crystal device taken along line II-II in FIG.

3 is a perspective view showing a back side structure of a main part of the structure shown in FIG. 1 according to arrows A and B in FIG. 1;

FIG. 4 is a perspective view showing an embodiment of an anisotropic conductive connector.

5 is a cross-sectional view showing an example of use of the anisotropic conductive connector shown in FIG. 4 along the line VV in FIG.

FIG. 6 is a perspective view showing an example of a substrate connection structure used in a conventional liquid crystal device.

[Explanation of symbols]

 Reference Signs List 1 liquid crystal device 2 liquid crystal panel 3 support members 4a, 4b liquid crystal panel substrate 4c, 4d substrate overhanging portion 6 light guide 7 light diffusion plate 8 spacer sheet 9 PCB (control substrate) 11 cover 12 sealing material 13a, 13b substrate material 14a, 14b Electrode 21 Liquid crystal 22a First flexible substrate 22b TCP (second flexible substrate) 23 Heat seal 24 TCP 26a, 26b Liquid crystal driving IC 27a, 27b Terminal 28a, 28b Hole 29 LED 31a, 31b Terminal 32a , 32b hole 33, 34 recess 36a, 36b anisotropic conductive connector 37 recess 38 base 39 conductive material 41a, 41b pin

Continued on the front page (72) Inventor Masashi Miyashita 3-3-5 Yamato, Suwa-shi, Nagano F-term in Seiko Epson Corporation (reference) 2H092 GA05 GA48 GA49 GA50 GA51 GA55 GA57 GA60 HA25 MA32 MA35 MA37 NA15 NA16 NA25 NA27 NA29 PA13 5G435 AA17 AA18 BB12 BB15 EE03 EE04 EE05 EE08 EE13 EE27 EE36 EE40 EE45 FF00 FF06 FF08 GG23 GG26 LL07

Claims (5)

[Claims] A plurality of flexible substrates electrically connected to a substrate of the electro-optical element; and a control substrate electrically connected to the plurality of flexible substrates via an anisotropic conductive connector. In the liquid crystal device having the above, the anisotropic conductive connector includes a plurality of conductive materials arranged at intervals on at least one surface, and a terminal portion of the flexible substrate and a terminal of the control substrate. An electro-optical device, wherein the flexible substrate and the control substrate are electrically connected by placing a portion on the one surface of the anisotropic conductive connector. 2. The electro-optical device according to claim 1, wherein the anisotropic conductive connector comprises a plurality of conductive materials arranged on a surface of an elastic base at an interval. 3. The electro-optical element according to claim 2, wherein the electro-optical element and the control board are arranged so as to overlap with each other via a support member that supports the anisotropic conductive connector. An electro-optical device, wherein the electro-optical device is pressed against the control board by a member. 4. The electro-optical device according to claim 3, wherein the support member has positioning pins, and the flexible substrate and the control substrate are commonly positioned by the pins. 5. The electro-optical device according to claim 2, wherein the support member has a concave portion, and the anisotropic conductive connector is accommodated in the concave portion.