JPH09318968A - Liquid crystal device and electronic equipment using the liquid crystal device - Google Patents

Abstract

(57) Abstract: A liquid crystal device is provided with a compact electronic device in which the liquid crystal device is mounted by reducing the cost through a very simple process that does not use a thermocompression bonding device. SOLUTION: Two substrates are arranged to face each other and a liquid crystal layer is provided between the substrates, a display means, a liquid crystal driving LSI, an FPC for inputting a signal, and the display means are protected. And a rubber connector that holds the display means and the FPC by a restoring force and electrically connects them.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a display device.
In addition, an AV (Audio & Vi) equipped with this liquid crystal device
dual) device, OA device, portable information device, communication device, and other electronic devices.

[0002]

2. Description of the Related Art In recent years, a liquid crystal device is often used as a display device in products such as navigation systems, televisions, palmtop computers, electronic organizers, and mobile phones. Further, there is a demand for a larger screen for the casing and cost reduction. For example, as a panel mounting method capable of coping with an increase in the screen size of a cabinet, COG (C
Hip on Glass) mounting method is widely used. An example of this is shown in FIGS. A frame-shaped shield case 18 made of a metal plate, a display unit 2, and a liquid crystal driving L
An ACF (Anisotropic C) for electrically connecting the display means 2 and the bumps 9 formed on the active surface of the liquid crystal driving LSI 8 by the SI8 and COG mounting method.
onductive film: anisotropic conductive film, COG
ACF 13), an FPC 15 for inputting a signal to the liquid crystal driving LSI 8, an ACF (FPC ACF 14) for electrically connecting the FPC 15 and the external connection electrodes 17 formed on the display means 2, This is a holding member 22 for maintaining strength, and the members are stacked in a vertical arrangement relationship as shown in the drawing to form the liquid crystal device 1.

Further, a display substrate (hereinafter referred to as a first substrate) 3 made of soda glass having a display transparent electrode layer (hereinafter referred to as a first transparent electrode layer) 5 provided on one surface, and a display substrate provided on one surface. A display substrate (hereinafter, second substrate) 4 made of soda glass provided with a transparent electrode layer (hereinafter, second transparent electrode layer) 6;
The first transparent electrode layer 5 and the second transparent electrode layer 6 are attached to each other so as to face each other, and the liquid crystal composition is sealed between them to form the display unit 2.

[0004]

However, in the conventional liquid crystal device 1, the FPC 15 is replaced by the ACF 1 for FPC.
4, the process using the thermocompression bonding device was required to connect to the display means 2.

As a result, when the display means 2 or the liquid crystal driving LSI 8 is broken due to the residual stress of thermocompression bonding,
The ACF 13 for COG may be peeled off by heat, and the temperature of thermocompression bonding needs to be lower than the softening temperature of the ACF 13 for COG that connects the liquid crystal drive LSI 8 and the display unit 2.

Therefore, an object of the present invention is to provide a liquid crystal device 1 which can reduce the cost and has high reliability by a very simple process without using a thermocompression bonding device. Another object of the present invention is to provide an inexpensive electronic device.

[0007]

According to a first aspect of the present invention, there is provided a liquid crystal device comprising a liquid crystal driving LSI, a display means having two substrates arranged to face each other and a liquid crystal layer provided between the substrates. And an FPC for inputting a signal, an enclosure for protecting the display means, and a rubber connector for sandwiching the display means and the FPC by a restoring force and electrically connecting them. Characterize.

According to a second aspect of the present invention, in a liquid crystal device, the first transparent electrode layer of the first substrate having the first transparent electrode layer on one surface and the second transparent electrode layer on the one surface. The second transparent electrode layer of the second substrate having an electrode layer is disposed so as to face each other, and a liquid crystal layer is provided between the first transparent electrode layer and the second transparent electrode layer. Display means provided, liquid crystal driving LSI, and FP for inputting signals
C, protecting the display means, the display means and the FP
A case and a holding member that sandwich C, an external connection electrode that is installed between the display means and the FPC, and is formed on at least one substrate of the display means, and the FPC.
And a rubber connector that clamps and is electrically connected by a restoring force.

In the liquid crystal device according to the first or second aspect of the present invention, the driving I is formed by the COG mounting method.
By using a display means (hereinafter referred to as a COG panel) to which C is connected and an FPC via a rubber connector, an interface with the outside can be realized with a very simple structure. Furthermore, since the thermocompression bonding step is eliminated, productivity is improved, safe production is possible, and cost reduction can be realized. In the above invention, for the rubber connector, for example, Shin-Etsu Interconnector manufactured by Shin-Etsu Polymer Co., Ltd. can be used.

A liquid crystal device according to a third aspect of the present invention is characterized in that a guide for positioning the FPC is provided.

A liquid crystal device according to a fourth aspect of the present invention is characterized in that the case is provided with a guide for positioning the FPC.

According to the third and fourth aspects of the invention, the FPC and the rubber connector can be easily aligned.

A liquid crystal device according to a fifth aspect of the invention is characterized in that a guide for positioning the rubber connector is provided.

A liquid crystal device according to a sixth aspect of the present invention is characterized in that the case is provided with a guide for positioning the rubber connector.

According to a seventh aspect of the invention, the liquid crystal device is characterized in that the guide is a claw formed by bending a part of the case.

According to the invention described in claims 5, 6 and 7, a liquid crystal driving IC is mounted on the liquid crystal panel by the COG mounting method.
This makes it easy to align the FPC with the COG panel with the rubber connector.

Further, a liquid crystal device according to an eighth aspect of the invention is characterized in that a preventing means is provided to prevent the FPC from coming off.

The liquid crystal device according to a ninth aspect of the invention is characterized in that the case is provided with a slit whose opening is smaller than the width of the connecting portion with the rubber connector portion of the FPC.

The liquid crystal device according to a tenth aspect of the present invention is an FPC having a structure in which it does not come out from the opening of the case.
Is provided.

The liquid crystal device according to the invention of claim 11 is characterized in that it is provided with an FPC having a "T" shape.

According to the invention described in claims 8, 9, 10 and 11, it is possible to prevent the FPC from slipping through the case of the liquid crystal device and to improve the connection reliability between the FPC and the display means.

According to a twelfth aspect of the present invention, there is provided an electronic apparatus equipped with the liquid crystal device according to any one of the first to tenth aspects.

[0023]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described below with reference to the drawings.

[Embodiment 1] FIG. 1 shows claims 1, 2, 8,
FIG. 2 is an exploded perspective view of a first embodiment of the liquid crystal device 1 according to the invention described in 9, 10 or 11, FIG. 2 is a sectional view thereof, and FIG. 3 is a detailed view of its essential part.

First, the configuration will be described.

A first substrate 3 made of soda glass having a thickness of 0.7 mm, having a first transparent electrode layer 5 on one surface,
The first transparent electrode layer 5 and the second transparent electrode layer 6 are opposed to each other with the second substrate 4 made of soda glass having a thickness of 0.7 mm provided with the second transparent electrode layer 6 on one surface. As described above, the display means 2 is constituted by encapsulating the liquid crystal composition between them, and the liquid crystal driving LSI 8 is electrically connected to the display means 2 by using the COG ACF 13 by the COG mounting method. .

Next, the FPC 15 is sandwiched between the shield case 18 and the holding member 22 so that the FPC 15 is electrically connected to the external connection electrode 17 formed on the COG panel via the rubber connector 16. Slit 1 in shield case 18
9 is provided, and the FPC 15 is passed through the slit 19.

The rubber connector 16 is not particularly limited as long as it realizes the same function, but, for example, Shin-Etsu Interconnector manufactured by Shin-Etsu Polymer Co., Ltd. can be used.

According to the above-mentioned structure, the liquid crystal device 1 can be realized by a simple process without using the thermocompression bonding process. Also,
Since the FPC15 has a "T" shape,
It is possible to prevent 15 from coming off from the shield case 18. Further, since the rubber connector 16 plays the role of a supporting member, it is possible to prevent the displacement of the display means 2 inside the housing and to diffuse the force applied from the outside of the housing to prevent the display means 2 from being destroyed. You can

[Embodiment 2] FIG.
FIG. 5 is a detailed view of a main part of a second embodiment of the liquid crystal device according to the invention described in 4, 5, 6, 7, 8, 9, 10 or 11, and FIG. 5 is a partially exploded perspective view thereof.

First, the configuration will be described. Although it is similar to the first embodiment, a different point is that a part of the shield case 18 is bent as shown in the drawing so that the FPC 15 and the rubber connector 16 are accommodated, and the claw 20 is provided.

The area surrounded by the claws 20 needs to be slightly larger than the outer shapes of the FPC 15 and the rubber connector 16, but should be determined in consideration of the connection pitch of the FPC 15, the rubber connector 16 and the COG panel. Needless to say. Further, the bending amount (bending height) of the claw is not particularly limited, but it is necessary to make it smaller than the sum of the height of the rubber connector 16 and the thickness of the FPC 15.

The main operation and effect are the same as in the first embodiment, but in this embodiment, the FPC 15, the rubber connector 16 and the COG panel can be easily aligned.

[Embodiment 3] FIG. 6 shows claims 1, 2, 3,
It is a disassembled perspective view of the 2nd Example of the liquid crystal device 1 which concerns on invention of 4, 5, 6, 7, 8, 9, 10 or 11.

First, the structure will be described. It is similar to the first embodiment except that the light guide plate 23 and the cold cathode fluorescent lamp 2 are different.
4. Backlight unit 26 consisting of reflection sheet 25
The liquid crystal device is being configured with the arrangement shown in FIG.

The main operation and effect are the same as in the case of the first embodiment, but in this embodiment, the image from the display means can be seen even in a dark place by the light from the backlight.

[Embodiment 4] FIG. 7 shows claims 1, 2 and 3.
11 is a perspective exploded view of a third embodiment of the liquid crystal device according to the invention described in 3, 4, 5, 6, 7, 8, 9 or 10. FIG. First, the configuration will be described. It is similar to the first embodiment, except that
FP divided into two parts using two rubber connectors 16
I am using C15.

The main operation and effect are the same as those in the first embodiment, but in this embodiment, as compared with the first embodiment,
The liquid crystal device 1 can be made more compact.

[Embodiment 5] FIG.
It is a perspective exploded view of the 4th example of the liquid crystal device concerning the invention of 4, 5, 6, 7, 8, 9, 10, or 11. First, the configuration will be described. Although it is similar to the first embodiment, a different point is that a chip component 27 such as a chip capacitor or a chip resistor necessary for operating the liquid crystal driving IC is mounted on the FPC 15 by soldering. .

Although the main operation and effect are the same as those of the first embodiment, in this embodiment, since the number of signals input to the FPC 15 can be reduced, the user can easily use the liquid crystal device 1.

[Embodiment 6] FIG.
It is a perspective exploded view of the 5th example of the liquid crystal device concerning the invention of 4, 5, 6, 7, 8, 9, 10, or 11. Although it is similar to the first embodiment, a different point is that a bus line for exchanging signals, which is required when using a plurality of liquid crystal driving LSIs 8, is incorporated in the FPC 15.

The main actions and effects are the same as in the first embodiment.

[Embodiment 7] FIG. 10 shows claims 1, 2, 3,
It is isometric view exploded view of the 6th Example of the liquid crystal device which concerns on invention of 4, 5, 6, 7, 8, 9, 10 or 11. Although it is similar to the first embodiment, a different point is that a plurality of liquid crystal driving LSIs 8 are connected by the COG method on two intersecting sides of the display means 2, and signals are exchanged between the adjacent liquid crystal driving LSIs 8. The bus line for this is built in the FPC 5.

The main actions and effects are the same as in the first embodiment.

[Embodiment 8] FIG. 11 shows an electronic device according to a twelfth aspect of the present invention, which is a first electronic device used in a mobile phone 28.
It is a figure showing an example. First, the configuration will be described. The liquid crystal device 1 has the same structure as that described in any one of the first to seventh embodiments, and the liquid crystal device 1 has the same structure as the lower part 3 of the casing of the mobile phone 28.
It is fixed to 0 with a screw 32 and mounted on a control circuit board 31 on which a control LSI or the like is mounted. The cellular phone 26 is constructed by covering the casing upper portion 29 from above.

According to the above-mentioned structure, the inexpensive and highly reliable mobile phone 28 can be provided.

Further, the liquid crystal device 1 constructed according to the first to seventh embodiments is used as a liquid crystal TV, a handy terminal, an electronic notebook,
Personal computer, palmtop computer,
It was installed in electronic devices such as toys and displays for navigation systems. Also in this case, the same effect as the above could be obtained.

As the liquid crystal device 1, Examples 1 to 7 were used.
Of course, other structures can be used.

[0049]

The liquid crystal device according to the first aspect of the invention is
Display means in which two substrates are arranged to face each other and a liquid crystal layer is provided between the substrates, and a liquid crystal driving LSI
An FPC for inputting a signal, an enclosure for protecting the display means, and a rubber connector for sandwiching the display means and the FPC by a restoring force and electrically connecting them. There is.

In the liquid crystal device according to the second aspect of the present invention, the first transparent electrode layer of the first substrate having the first transparent electrode layer on one surface and the second transparent electrode layer on the one surface. The second transparent electrode layer of the second substrate having an electrode layer is disposed so as to face each other, and a liquid crystal layer is provided between the first transparent electrode layer and the second transparent electrode layer. Display means provided, liquid crystal driving LSI, and FP for inputting signals
C, protecting the display means, the display means and the FP
A case and a holding member that sandwich C, an external connection electrode that is installed between the display means and the FPC, and is formed on at least one substrate of the display means, and the FPC.
And a rubber connector for sandwiching them by a restoring force and electrically connecting them.

In the liquid crystal device according to the first or second aspect of the invention, by using the rubber connector for connecting the COG panel and the FPC, the interface with the outside can be realized with a very simple structure. further,
Since the thermocompression bonding step is eliminated, productivity is improved, safe production is possible, and cost reduction can be realized.

The liquid crystal device according to the third aspect of the present invention has a structure in which a guide for positioning the FPC is provided.

The liquid crystal device according to a fourth aspect of the invention has a structure in which a guide for positioning the FPC is provided in the case.

According to the third and fourth aspects of the invention, the FPC and the rubber connector can be easily aligned.

The liquid crystal device according to a fifth aspect of the present invention has a structure in which a guide for positioning the rubber connector is provided.

The liquid crystal device according to a sixth aspect of the invention has a structure in which a guide for positioning the rubber connector is provided in the case.

In the liquid crystal device according to the seventh aspect of the invention, the guide is a claw in which a part of the case is bent.

According to the invention described in claims 5 and 6, C
The OG mounting method facilitates alignment of the COG panel in which the liquid crystal driving IC is mounted on the liquid crystal panel, the rubber connector, and the FPC.

Further, the liquid crystal device according to the invention of claim 8 has a constitution in which a preventing means is provided to prevent the FPC from coming off.

The liquid crystal device according to a ninth aspect of the present invention is configured such that the case has a slit whose opening is smaller than the width of the connection portion with the rubber connector portion of the FPC.

The liquid crystal device according to the tenth aspect of the invention is an FPC having a structure in which it does not come out from the opening of the case.
Is provided.

The liquid crystal device according to the invention of claim 11 is provided with an FPC having a "T" shape.

According to the eighth, ninth, tenth, and eleventh aspects of the present invention, it is possible to prevent the FPC from slipping through the casing of the liquid crystal device and to improve the connection reliability between the FPC and the display means.

An electronic apparatus according to a twelfth aspect of the invention is equipped with the liquid crystal device according to any one of the first to eleventh aspects.

Therefore, the effect of the invention according to any one of claims 1 to 11 is that the space inside the electronic device can be reduced, so that there is an effect that the electronic device can be made lightweight and compact, and the cost is low and the reliability is high. The electronic device can be provided.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing an embodiment of the present invention.

FIG. 3 is a detailed view of a main part of FIG.

FIG. 4 is a detailed view of the essential parts of an embodiment of the present invention.

5 is a partially exploded perspective view of FIG.

FIG. 6 is an exploded perspective view showing an embodiment of the present invention.

FIG. 7 is an exploded perspective view showing an embodiment of the present invention.

FIG. 8 is an exploded perspective view showing an embodiment of the present invention.

FIG. 9 is an exploded perspective view showing an embodiment of the present invention.

FIG. 10 is an exploded perspective view showing an embodiment of the present invention.

FIG. 11 is an exploded perspective view showing an embodiment of the present invention.

FIG. 12 is a sectional view showing a conventional technique.

13 is a detailed view of a main part of FIG.

[Explanation of symbols]

 1. Liquid crystal device 2. Display means 3. First substrate 4. Second substrate 5. First transparent electrode layer 6. Second transparent electrode layer 7. Seal material 8. Liquid crystal drive LSI 9. Bump 10. First polarizing plate 11. Second polarizing plate 12. Reflector 13. ACF for COG 14. ACF for FPC 15. FPC 16. Rubber connector 17. External connection electrode 18. Shield case 19. Slit 20. Claw 21. Lower case 22. Holding member 23. Light guide plate 24. Cold cathode tube 25. Reflective sheet 26. Backlight unit 27. Chip parts 28. Mobile phone 29. Upper case 30. Lower case 31. Control circuit board 32. Screw

Claims (12)

[Claims] 1. A display unit having two substrates arranged to face each other and a liquid crystal layer provided between the substrates, a liquid crystal driving LSI, an FPC for inputting a signal, and the display unit. A liquid crystal device, comprising: a casing to be protected; and a rubber connector that clamps the display unit and the FPC by a restoring force and electrically connects them. 2. A first structure having a first transparent electrode layer on one surface thereof.
The first transparent electrode layer of the substrate and the second transparent electrode layer of the second substrate having a second transparent electrode layer on one surface thereof are arranged to face each other, and Display means having a liquid crystal layer between the first transparent electrode layer and the second transparent electrode layer; a liquid crystal driving LSI; an FPC for inputting a signal; and the display means for protecting the display means. A case and a holding member for sandwiching the FPC, and an external connection electrode, which is installed between the display means and the FPC and is formed on at least one substrate of the display means, and the FPC by a restoring force. And a rubber connector electrically connected to the liquid crystal device. 3. The liquid crystal device according to claim 1 or 2, wherein a guide for positioning the FPC is provided. 4. The liquid crystal device according to claim 3, wherein the case is provided with a guide for positioning the FPC. 5. The liquid crystal device according to claim 1, wherein a guide for positioning the rubber connector is provided. 6. The liquid crystal device according to claim 5, wherein the case is provided with a guide for positioning the rubber connector. 7. The liquid crystal device according to claim 6, wherein the guide is a claw formed by bending a part of a case. 8. The liquid crystal device according to claim 1, further comprising a preventing unit for preventing the FPC from coming off. 9. The liquid crystal device according to claim 8, wherein the case has a slit whose opening is smaller than a width of a connection portion with a rubber connector portion of the FPC. 10. The liquid crystal device according to claim 1, further comprising an FPC having a structure that does not come out from an opening of the case. 11. The liquid crystal device according to claim 10, wherein:
A liquid crystal device comprising a TPC-shaped FPC. 12. An electronic apparatus equipped with the liquid crystal device according to claim 1.