JP2001033802A - Liquid crystal display module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a module small in size as a whole by shortening an extending part as much as possible, and also to expand an effective display area. SOLUTION: In this liquid crystal display module, an IC chip 30 is mounted on the back side being the opposite side of the exposed side of an extending part 11. Electrode terminal parts 12a, 22a of the transparent electrode patterns 12, 22 are formed near an edge end 11a on the exposed face side of the extending part 11, while a connection terminal part 14b of an IC chip connection use pattern 14 is formed near an edge end 11b on the back side of the extending part 11 corresponding to the electrode terminal parts 12a, 22a. The electrode terminal parts 12a, 22a are connected to the connection terminal part 14b through a bonding wire, and further, the IC chip 30 is connected to the outside on the back side of the extending part 11, therefore, an outside connection use pattern 13 is formed so that an external connection terminal part 13b is positioned at a prescribed place on the back of the extending part 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a liquid crystal display module on which an IC chip such as a driver IC can be mounted.

[0002]

2. Description of the Related Art For example, a liquid crystal display module is incorporated in a portable information terminal such as a mobile phone. On Glass).

FIG. 20 is a perspective view showing a conventional example of a liquid crystal display module belonging to the COG mode. As shown in FIG. 20, the liquid crystal display module of the COG mode has two glass substrates as a liquid crystal display surface. 100 and 200 are superposed. Of the two glass substrates 100 and 200,
One of the substrates 100 is a side portion 200a of the other substrate 200.
The extension portion 110 is provided so that one side of the extension protrudes.
On the exposed surface of the extension 110, an IC chip is mounted, and transparent electrode patterns 120, 220 are drawn out from the overlapping inner surfaces of the two glass substrates 100, 200 to the mounting position of the IC chip. It is formed.
Further, an external connection pattern 130 is formed on the exposed surface of the extension 110 so as to be drawn out from the mounting location of the IC chip to the vicinity of the edge. One of these transparent electrode patterns 120 and 220 is used as a segment electrode for driving liquid crystal, and the other is used as a common electrode. The external connection pattern 130 is a signal line for supplying an external power supply voltage and various control signals to an IC chip serving as a driver IC.
0 flexible connection board FP
C is connected to perform input / output with the outside.

As described above, the IC chip is mounted on the exposed surface of the extension 110, and the transparent electrode patterns 120 and 220 including a large number of signal lines and the external connection pattern 130 must be formed. No. Therefore, each of the patterns 120, 220, 1
A sufficient space for forming 30 is secured, and its width dimension W needs to be at least about 7 to 9 mm. In particular, the external connection terminal portion 130 of the external connection pattern 130
In the vicinity of “a”, a connection area sufficient to some extent is secured to connect a part of the front end of the flexible wiring board FPC.

Further, both transparent electrode patterns 120, 220
Generate an effective display area in the form of a dot matrix as shown by a broken line in the figure by intersecting at the twisted position with each other at the inner surface portion, of which a transparent electrode pattern denoted by reference numeral 220 is a segment electrode and a common electrode. One of the electrodes must be formed so as to go around both sides of the effective display area. for that reason,
Some wiring area is required on both sides of the effective display area.

[0006]

Recently, while miniaturization of the entire liquid crystal display module has been demanded, it has been demanded to enlarge the effective display area.
On the other hand, in the conventional liquid crystal display module, as described above, the IC chip is mounted on the exposed surface of the extension 110, and each pattern 120 including a large number of signal lines is disposed in a predetermined area other than the effective display area. , 220, 130
Must be formed. In view of these points, in order to meet the above-mentioned demands and requests, it is said that the width dimension W of the extension portion 110 may be reduced.

However, there is a limit in cutting off the extension 110 while securing the mounting location of the IC chip and a predetermined pattern area, due to the configuration of the extension 110. That is, in the extension portion 110, the IC chip and the patterns 120, 220, and 13 are placed on the same exposed surface.
Therefore, it is difficult to reduce the width W of the extension 110 more than just by using only one side of the extension 110 in this way.

In view of the above, the present invention has been conceived in view of the above circumstances, and it is possible to reduce the size of the entire module by cutting down the extension as much as possible, and also to enlarge the effective display area. It is an object to provide a liquid crystal display module.

[0009]

DISCLOSURE OF THE INVENTION In order to solve the above problems, the present invention employs the following technical means.

That is, in the liquid crystal display module provided by the first aspect of the present invention, at least one side of the two transparent substrates superimposed as the liquid crystal display surface is the other substrate. A liquid crystal display module having an integrated extension so as to protrude therefrom, and an IC chip mounted on one of the substrates as a mounting substrate, wherein the IC chip is opposite to an exposed surface of the extended portion. A transparent electrode that is mounted facing the back side that is the side and is continuous from the overlapping inner surface portion of the two transparent substrates and has an electrode terminal portion formed near the exposed surface side edge of the extension portion. An IC connection pattern in which a connection terminal portion is formed near an edge on the back surface side of the extension portion corresponding to the electrode terminal portion while being continuous from a pattern and a mounting portion serving as a connection portion with the IC chip. A connection member connected to both the electrode terminal portion and the connection terminal portion and provided so as to go around the outer edge of the extension portion; and the IC chip on the back surface side of the extension portion. To connect with the outside,
An external connection pattern in which an external connection terminal portion is formed at a predetermined location on the back surface side of the extension portion while being continuous from the mounting location of the IC chip.

Further, the liquid crystal display module provided by the second aspect of the present invention has a structure in which one of the two transparent substrates superposed as the liquid crystal display surface has:
A liquid crystal display module having an integrated portion provided with an integrated portion so that at least one side protrudes from the other substrate, and an IC chip mounted on one of the substrates as a mounting substrate. An electrode terminal portion, which is mounted facing the exposed surface side of the protruding portion and is continuous from the overlapping inner surface portions of the two transparent substrates and is a connection portion with the IC chip, is formed at a mounting portion of the IC chip. A transparent electrode pattern, an external communication pattern in which a connection terminal portion is formed near an edge on the exposed surface side of the extension portion while being continuous from the mounting position of the IC chip, and an exposed surface of the extension portion. An external connection terminal pattern formed in the vicinity of an edge on the back surface side of the extending portion corresponding to the contact terminal portion, in order to connect the IC chip to the outside on the opposite back surface side; Is connected both to the 絡端Ko portion and the external connection terminal pattern is characterized by comprising a connecting member provided in such a way as to wrap around the edge outside of the extending portion.

Further, in the liquid crystal display module provided by the third aspect of the present invention, at least one side of the two transparent substrates superposed as the liquid crystal display surface is the other substrate. A liquid crystal display module in which an integrated portion is provided so as to protrude, and an IC chip is mounted using one of such substrates as a mounting substrate, wherein the IC chip has the integrated integrated portion. The substrate is mounted as a mounting substrate facing the outer surface side, and an electrode terminal portion is formed near the edge on the exposed surface side of the extension portion while continuing from the overlapping inner surface portion of the two transparent substrates. A transparent electrode pattern, a reflective layer formed on the outer surface of the mounting substrate to reflect light from the mounting substrate side to the inner surface portion side, and a reflective layer formed on the surface so as to cover the reflective layer. Formed on the surface of the insulating layer and the surface of the insulating layer, while being continuous from the mounting location of the IC chip serving as a connection site for the IC chip, the extension portion corresponding to the electrode terminal portion. An IC connection pattern in which a connection terminal portion is formed near the edge opposite to the exposed surface, and connected to both the electrode terminal portion and the connection terminal portion so as to go around the edge edge of the extension portion. The connecting member provided is formed on the surface of the insulating layer to connect the IC chip to the outside on the outer surface side of the mounting board, while being continuous from the mounting location of the IC chip, An external connection pattern in which an external connection terminal portion is formed at a predetermined position on the outer surface side of the mounting substrate.

Further, in the liquid crystal display module provided by the fourth aspect of the present invention, at least one side of one of the two transparent substrates superposed as the liquid crystal display surface is the other. A liquid crystal display module having an integrated extension provided so as to protrude from the substrate, and an IC chip mounted on one of the substrates as a mounting substrate, wherein the IC chip is provided separately from the extension. The substrate serving as a mounting substrate is mounted facing the outer surface side as a mounting substrate, and while being continuous from the overlapping inner surface portion of the two transparent substrates, an electrode terminal portion is provided near an edge of the extension portion on the exposed surface side. Formed on the outer surface of the mounting board to reflect light from the mounting board side to the inner surface side, and a reflective layer formed on the outer surface of the mounting board to cover the reflecting layer. The formed insulating layer is formed on the surface of the insulating layer, and is continuous from a mounting portion of the IC chip serving as a connection portion with the IC chip, and corresponds to the electrode terminal portion. An IC connection pattern in which a connection terminal portion was formed near the outer edge was connected to both the electrode terminal portion and the connection terminal portion, and provided so as to connect these terminal portions in a stepped manner. A connection member, formed on the surface of the insulating layer to connect the IC chip to the outside on the outer surface side of the mounting board, and connected to the mounting location of the IC chip, And an external connection pattern in which an external connection terminal portion is formed at a predetermined position on the outer surface side of the electronic device.

What can be said in common to the liquid crystal display modules according to the first to fourth aspects is that the exposed surface of the extension portion on which the transparent electrode pattern is formed and the surface different from the exposed surface are different. A predetermined pattern is connected via a connecting member, and an IC
The chip and the outside are to be connected on a surface other than the exposed surface of the extension.

In particular, a common feature of the liquid crystal display modules according to the first and second aspects is that the IC chip is mounted so as to face the extension part, that is, the inner surface part passes through both transparent substrates. The point is that the IC chip is arranged so as not to block the light guided to the IC chip.

On the other hand, the common feature of the liquid crystal display modules according to the third and fourth aspects is that the IC chip is mounted on the outer surface of the mounting substrate facing the inner surface with the reflection layer and the insulating layer as boundaries. The point is that the IC chip is arranged so as not to disturb the light reflected and guided from the side of the mounting substrate to the inner surface.

In the liquid crystal display module provided by the first aspect in which the above technical measures are taken, only the electrode terminal portion of the transparent electrode pattern is formed on the exposed surface of the extension. On the other hand, an IC chip is mounted and an IC connection pattern and an external connection pattern are formed on the back surface of the extension opposite to the exposed surface. The IC chip on the back side is electrically connected to the transparent electrode pattern on the opposite side via the IC connection pattern and the connection member, and is electrically connected to the outside on the same surface via the external connection pattern. Therefore, according to the liquid crystal display module provided by the first aspect, the back surface opposite to the exposed surface of the extension portion is used for mounting the IC chip and connecting to the outside, and as a region of each pattern. Since the necessary space is appropriately allocated to both sides of the extension, the width of the extension along the extension direction can be reduced accordingly, and the size of the entire module can be reduced. On the other hand, if the overlapping portion of both substrates, that is, the inner surface portion is widened and the extended portion is cut off, the effective display area in the form of a dot matrix generated by intersecting the transparent electrode pattern at such an inner surface portion can be enlarged. Can also.

In the liquid crystal display module provided by the second aspect, an IC chip is mounted on the exposed surface of the extension, and the electrode terminal of the transparent electrode pattern and the contact terminal of the external communication pattern are provided. A part is formed. On the other hand, on the back side of the extension part opposite to the exposed surface,
An external connection terminal pattern is formed corresponding to the contact terminal portion. The IC chip on the exposed surface is electrically connected to the transparent electrode pattern via the electrode terminal portion on the same surface, and is electrically connected to the external connection terminal pattern on the opposite side via the external communication pattern and the connection member. Is done. Thus, the IC chip is electrically connected to the outside via the external connection terminal pattern. Therefore, according to the liquid crystal display module provided by the second aspect, the back surface opposite to the exposed surface of the extension portion is used for connection to the outside, and the space required for connection to the outside is extended. Since it is not necessary to allocate the portion on the exposed surface of the portion, the width dimension along the extension direction of the extension portion can be reduced by that amount, and the size of the entire module can be reduced. On the other hand, if the overlapping portion of the two substrates, that is, the inner surface portion is widened and the extended portion is cut off, the effective display area can be enlarged similarly to the effect of the first aspect.

Further, in the liquid crystal display module provided by the third aspect, only the electrode terminal portion of the transparent electrode pattern is formed on the exposed surface of the extension. On the other hand, on the outer surface of the mounting substrate integrated with the extension, for example, an IC chip is mounted near the center thereof, and an IC connection pattern and an external connection pattern are formed around such a mounting portion. . The IC chip on the outer surface of the mounting substrate is conductively connected to the transparent electrode pattern on the exposed surface of the extension via the IC connection pattern and the connection member, and is also on the same surface via the external connection pattern. Is electrically connected to the outside. Therefore, according to the liquid crystal display module provided by the third aspect, the entire outer surface including the back surface side of the extension is used as the mounting substrate surface for mounting the IC chip and connecting to the outside. The necessary space for the area is largely allocated not only to the exposed surface of the extension part but also to the entire outer surface of the mounting board, so that the width dimension along the extension direction of the extension part can be reduced by that amount, and The size of the entire module can be reduced. On the other hand, if the overlapping portion of the two substrates, that is, the inner surface portion is widened and the extended portion is cut off, the effective display area can be enlarged similarly to the effects of the first and second side surfaces.

Incidentally, the IC chip according to the third aspect is as follows.
It is not directly mounted on the outer surface of the mounting board,
As described above, it was mounted on the reflective layer and the insulating layer formed on the outer surface of the mounting substrate so as not to disturb the light reflected and guided from the side of the mounting substrate to the inner surface. Things. The IC connection pattern and the external connection pattern are also formed on the reflection layer and the insulation layer.

Furthermore, in the liquid crystal display module provided by the fourth aspect, only the electrode terminals of the transparent electrode pattern are formed on the exposed surface of the extension. On the other hand, an IC chip is mounted on the outer surface of the mounting substrate which is separate from the extension portion, for example, near the center thereof, and an IC connection pattern and an external connection pattern are formed around such a mounting portion. Is done. The IC chip on the outer surface of the mounting board is conductively connected to the transparent electrode pattern on the exposed surface of the extending portion via the IC connection pattern and the stepped connection member, and via the external connection pattern. It is electrically connected to the outside on the same plane. Therefore,
According to the liquid crystal display module provided by the fourth aspect, the entire outer surface of the substrate stacked separately from the extension portion is used as the mounting substrate surface for mounting the IC chip and connecting to the outside. Since the space required for each pattern area is largely allocated not only to the exposed surface of the extending portion but also to the entire outer surface of the mounting board, the width dimension along the extending direction of the extending portion can be reduced accordingly. Thus, the size of the entire module can be reduced. On the other hand, if the overlapping portion of the two substrates, that is, the inner surface portion is widened and the extended portion is cut off, the effective display area can be enlarged similarly to the effects of the first, second, and third side surfaces. it can.

The IC chip according to the fourth aspect also
It is not directly mounted on the outer surface of the mounting board,
As described above, it was mounted on the reflective layer and the insulating layer formed on the outer surface of the mounting substrate so as not to disturb the light reflected and guided from the side of the mounting substrate to the inner surface. Things. The IC connection pattern and the external connection pattern are also formed on the reflection layer and the insulation layer.

In a preferred embodiment of the liquid crystal display module according to the third and fourth aspects, the outer surface of the mounting substrate has a rough surface so as to guide the light reflected by the reflective layer toward the inner surface. It is possible to adopt a configuration having a shape.

According to such a configuration, the light reflected by the reflection layer is efficiently guided to the inner surface through the rough outer surface of the substrate, and sufficient light required for liquid crystal display can be obtained.

In a preferred embodiment of the liquid crystal display module according to the first to fourth aspects, the extending portion has an L-shape extending vertically and horizontally by crossing two sides protruding from the other substrate. It has an exposed surface, and it is possible to adopt a configuration in which the electrode terminal portions of the transparent electrode pattern are distributed as segment electrodes and common electrodes on such vertical and horizontal exposed surfaces.

According to such a configuration, for example, the electrode terminals of the transparent electrode pattern serving as the segment electrodes can be formed at equal intervals on the exposed surface along the vertical direction of the extension portion, but on the exposed side along the horizontal direction. On the exposed surface, electrode terminals of a transparent electrode pattern serving as a common electrode can be formed at regular intervals. Each transparent electrode pattern is extended linearly toward the inner surface of each substrate while continuing from the electrode terminal portions formed on each of the vertical and horizontal exposed surfaces. Then,
In the overlapping inner surface portions of the two substrates, each of the transparent electrode patterns is in a twisted position and intersects, thereby generating a dot matrix effective display area. In other words, the effective display area where both transparent electrode patterns intersect is occupied up to the vicinity of the L-shaped extension along the vertical and horizontal directions, so that there is no need to provide a useless area around such an effective display area, which is almost the same as the conventional one. Even in the case of the inner surface having a size, the effective display area may be extended to the vicinity of the periphery of the inner surface.

In another preferred embodiment, the IC chip is bonded to a mounting portion via an anisotropic conductive adhesive, and an anisotropic conductive material is used for connection to the outside. It can be configured.

According to such a configuration, when the IC chip is mounted, the IC chip is electrically connected to the predetermined pattern via the anisotropic conductive adhesive, and the IC chip is securely mounted at the mounting position. It can be in a joined form.
On the other hand, when connecting to the outside, the external connection terminal portion or the external connection terminal pattern of the external connection pattern is connected to an external terminal or the like located outside via an anisotropic conductive material, and the IC chip is securely connected to the external device. Can be electrically connected.

Further, as another preferred embodiment, the connection member may be a wire formed by wire bonding so as to connect between predetermined terminal portions. It is possible to adopt a configuration in which the portion is sealed with an insulating resin near the portion.

According to such a configuration, the wire is formed by wire bonding so as to go around the outside of the edge of the extending portion or as a stepped shape near the extending portion, and is formed on a different surface via such a wire. The predetermined terminals formed can be securely connected to each other. Further, since the wire is sealed with an insulating resin in the vicinity of the extension, protection from the outside air and prevention of breakage of the wire can be achieved.

Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention.
1 is a schematic perspective view showing the front side of the liquid crystal display module according to the embodiment, FIG. 2 is a schematic perspective view showing the back side of the liquid crystal display module shown in FIG. 1, and FIG. 3 is a line II in FIG. FIG. 4 is an enlarged cross-sectional view showing a main part of the cross-section shown in FIG. 3. In addition, in each drawing, some members are omitted in order to clarify the features of the present invention. In some drawings, details cannot be faithfully represented, and some parts are omitted for convenience.

As shown in FIGS. 1 to 4, the liquid crystal display module M1 according to the first embodiment includes two large and small glass substrates 10, 20 as transparent substrates, and a transparent electrode pattern as a segment electrode and a common electrode. 12, 22, an external connection pattern 13, an IC connection pattern 14, a bonding wire 15 as a connection member, two polarizing plates 16, 26, an IC chip 30, and the like. A liquid crystal LC is sealed between the glass substrates 10 and 20.

In brief, the liquid crystal display module M1 basically includes two glass substrates 1 serving as a liquid crystal display surface.
In particular, the liquid crystal display module M1 according to the present embodiment has a so-called COG (Chip On) in which the IC chip 30 is directly mounted on the glass substrate 10.
Glass). The larger glass substrate 10 is provided with an elongated extension 11 such that one side of the glass substrate 10 protrudes from the side 20 a of the other glass substrate 20.
In the extension portion 11, a surface facing the other substrate 20 side is called an exposed surface, and a side opposite to the exposed surface is called a back surface. In addition, a portion where both substrates 10 and 20 overlap with each other is called an inner surface portion.

A transparent electrode pattern 1 composed of a number of signal lines extends from the inner surface to the exposed surface of the extension 11.
2, 22 are formed. On the other hand, the IC chip 30 is mounted on the back surface side of the extension portion 11, and the IC connection pattern 14 and the external connection pattern 13 are formed around the mounting location of the IC chip 30. The IC chip 30 is a driver IC for controlling a liquid crystal display.
And so on. The corresponding signal lines of the transparent electrode patterns 12 and 22 and the IC connection pattern 14 are connected to each other via bonding wires 15. The external connection pattern 13 is formed to connect the IC chip 30 to the outside. The polarizing plates 16 and 26 are bonded on the outer surfaces of the substrates 10 and 20 so as to face the inner surface.

More specifically, the glass substrate 1
As shown in FIGS. 3 and 4, the reference numerals 0 and 20 denote a thin and transparent liquid crystal with an inner surface sealed with liquid crystal LC. A fixed narrow space is formed in a portion along the periphery of the inner surface. The sealing material 40 is sandwiched so as to be formed. A transparent electrode pattern indicated by reference numeral 12 is formed on the inner surface of one substrate 10, and a transparent electrode pattern indicated by reference numeral 22 is formed on the inner surface of the other substrate 20. One of these transparent electrode patterns 12 and 22 functions as a segment electrode, and the other functions as a common electrode. Further, as shown in FIG. 1, the extending portion 11 which becomes a part of the one substrate 10 has a width W1.
However, the shape protrudes from the side portion 20 a of the other substrate 20.

The transparent electrode patterns 12 and 22 are made of ITO.
(Indium Tin Oxide) film etc., each glass substrate 10,
20 are wired so as to intersect with each other on the inner surface portion. One of the transparent electrode patterns 12 is formed continuously from the inner surface of the substrate denoted by reference numeral 10 to the extension 11, and as shown in FIG. It is located near the end 11a. Further, the other transparent electrode pattern 22 is formed on the inner surface of the other substrate 20 which is separate from the extension 11, but is provided outside the sealing material 40 as shown in FIG. The conductive material 50 is guided to the exposed surface of the extension 11 through the conductive material 50. Then, the electrode terminal portion 22a of the transparent electrode pattern 22
Similarly, the transparent electrode pattern 12 is located in the vicinity of the exposed surface edge 11 a of the extension portion 11. The two transparent electrode patterns 12 and 22 are twisted with each other and intersect at the inner surface to generate an effective display area (not shown) in the form of a dot matrix. An alignment film or the like is provided on the inner surfaces of the transparent electrode patterns 12 and 22 and further on the surface thereof, but the alignment film and the like are not particularly illustrated.

The external connection pattern 13 and the IC connection pattern 14 are formed by depositing, etching, or the like the vicinity of the back surface of the extension 11 using, for example, aluminum. As shown in FIG. 4, the base ends 13a and 14a of the patterns 13 and 14 are bumps 30a and 30a of the IC chip 30, respectively.
It is formed at a position corresponding to b. The external connection terminal portion 13b on the other end side of the external connection pattern 13 is located at a predetermined position on the back surface of the extension portion 11, as shown in FIG. On the other hand, the connection terminal portion 14b on the other end side of the IC connection pattern 14 is located near the edge 11b on the rear surface of the extension portion 11 corresponding to the electrode terminal portions 12a and 22a of the transparent electrode patterns 12 and 22. positioned. The external connection pattern 13 is used to supply an external power supply voltage and various control signals to an IC chip 30 as a driver IC. The IC connection pattern 14 is used for electrically connecting the IC chip 30 and the transparent electrode patterns 12 and 22.

The bonding wires 15 connect the electrode terminals 12a, 22a of the transparent electrode patterns 12, 22 and the connection terminals 14b of the IC connection pattern 14 with, for example, gold wires. Therefore, the bonding wires 15 are connected to the edges 11a, 11
b is formed by wire bonding so as to go around the outside. Each of the terminal portions 1 is plated with nickel, gold, or the like so that the bonding wires 15 can be easily connected to the bonding surface and secure the connection.
Bonded to 2a, 22a, 14b. Further, the bonding wires 15 are sealed with an insulating resin 60 covering the entire edges 11a and 11b of the extension portion 11, thereby protecting the wires 15 from the outside air and preventing the wires 15 from being damaged.

Each of the polarizing plates 16 and 26 is made of, for example, a polymer film such as PVA (polyvinyl alcohol) as a polarizer and two TACs (tri-acetyl cellulose).
It is a film material interposed between the substrates and the like, and is bonded to the outer surfaces of both substrates 10 and 20 so that the polarization directions of light intersect. Light from the light source is incident, for example, so as to pass through the polarizing plate 16, the glass substrate 10, the liquid crystal LC on the inner surface, the glass substrate 20, and the polarizing plate 26 in this order. At this time, the liquid crystal LC in the effective display area is controlled. Then, a liquid crystal display is performed. The detailed description of the basic principle of the liquid crystal display is omitted.

As shown in FIG. 4, the IC chip 30 anisotropically aligns the bumps 30a, 30b with the base ends 13a, 14a of the external connection pattern 13 and the IC connection pattern 14, respectively. It is joined to the back surface of the extension 11 by thermocompression bonding or the like via the conductive adhesive 70. That is, the input bumps 30a of the IC chip 30 are connected to the external connection pattern 13 while the output bumps 3a are connected to the external connection pattern 13.
0b is connected to the IC connection pattern 14. The IC connection pattern 14 is a bonding wire 1
5 are connected to the transparent electrode patterns 12 and 22 via the output bumps 30b of the IC chip 30.
Are connected to the transparent electrode patterns 12 and 22. With such a connection form, the IC chip 30 can exchange signals with the outside through the external connection pattern 13, and can transmit the liquid crystal L through the transparent electrode patterns 12 and 22.
C can be controlled.

Next, FIG. 5 is an exploded perspective view shown for explaining the assembled form of the liquid crystal display module M1 shown in FIGS. As shown in this figure, the liquid crystal display module M1 is fixed to the board component 80 via the bezel 81 with the smaller board 20 as the display front side. A light guide plate 82 is arranged between the substrate 10 and the substrate component 80 on the display rear side. A light source such as an LED (not shown) is arranged on the side of the light guide plate 82, and the light guide plate 82 is
The light is guided to the inner surface of the liquid crystal display module M1 through the light source. The light transmitted through the inner surface portion is transmitted through the opening 81 of the bezel 81.
Finally, it is led to the outside through a. In order to connect the liquid crystal display module M1 to the outside, the external terminals 80a... At positions corresponding to the external connection terminal portions 13b of the external connection pattern 13 not shown in FIG. Are formed. The external terminals 80a ...
In the state where the liquid crystal display module M1 is fixed, the external terminals 80a are connected to the external connection patterns 13 via the anisotropic conductive rubber 83 when the liquid crystal display module M1 is fixed. The terminal 13b is electrically connected.

The liquid crystal display module M1 has a configuration in which the IC chip and the outside are connected on the back surface side of the extension portion 11, and both surfaces of the extension portion 11 are used as wiring spaces for each pattern. As can be seen from the comparison with the conventional product shown in FIG. 20, the width dimension W1 of the extension portion 11 is cut short. Therefore, according to the first embodiment, for example, when the inner surface portion of the liquid crystal display module M1 where the effective display area is formed is approximately the same as that of the conventional product, the extension portion 11 is shorter than that of the conventional product. The outer shapes of the display module M1 and the bezel 81 can be made smaller than before, and the liquid crystal display module M1 can be compactly housed in a case of a small device (not shown). On the other hand, when the outer shape of the liquid crystal display module M1 is substantially the same as that of the conventional product, the overlapping inner surface of both substrates 10 and 20 is enlarged and effective because the extension portion 11 is cut shorter than the conventional product. The display area has been expanded,
As a result, the opening area 81a of the bezel 81 can be enlarged to save a display area.

Next, FIG. 6 is a schematic perspective view showing a front side of a liquid crystal display module according to a second embodiment as one embodiment of the present invention, and FIG. 7 is a rear view of the liquid crystal display module shown in FIG. FIG. 9 is a schematic perspective view showing the liquid crystal display module M according to the second embodiment with reference to these drawings.
2 will be described briefly. Note that members having the same functions as those according to the first embodiment are given the same names and the same reference numerals, and detailed description is omitted.

As shown in FIGS. 6 and 7, the liquid crystal display module M2 according to the second embodiment has substantially the same configuration as the liquid crystal display module M1 according to the first embodiment. Are different. In other words, the liquid crystal display module M2 has a configuration in which the adjacent one side portion 11a 'and the other side portion 11a "of the larger substrate 10 protrude from the other substrate 20, and the L-shaped extending portion 1 extends vertically and horizontally.
1 ′, 11 ″. For example, one transparent electrode pattern 12 serving as a segment electrode is
Is formed continuously in a straight line from the inner surface to the exposed surface of one extension 11 ′, and the electrode terminal portion 12a is located near one side 11a ′ near the edge of the exposed surface of the extension 11 ′. It is formed. On the other hand, the other transparent electrode pattern 22 serving as the common electrode is formed in a straight line from the inner surface of the other substrate 20 separate from the extension portions 11 ′ and 11 ″ to the exposed surface of the other extension portion 11 ″. The electrode terminal portion 22a is formed near the other side portion 11a "which is near the exposed surface edge of the extension portion 11". It should be noted that the widths of the extended portions 11 'and 11 "in such a form are substantially the same as those in the first embodiment.

The ICs are positioned so as to correspond to the electrode terminals 12a and 22a of the transparent electrode patterns 12 and 22.
The connection terminal portion 14b of the connection pattern 14 is
The electrode terminals 12a, 22a and the connection terminal 14b are connected to each other via bonding wires 15.

As described above, the transparent electrode pattern 1 which is twisted at the inner surface and is wired so as to cross each other.
2, 22 are formed in a straight line as a segment electrode and a common electrode.
When 2 intersect, an effective display area in the form of a dot matrix is generated on the inner surface. Then, the effective display area in the form of a dot matrix indicated by a broken line in FIG.
0 and a much larger area than the effective display area of the conventional product and the effective display area according to the first embodiment. The reason is that it is not necessary to provide wiring regions on both sides of the effective display area.

Therefore, according to the liquid crystal display module M2 according to the second embodiment, both transparent electrode patterns 12,
The effective display area where 22 intersects reaches the vicinity of the L-shaped extending portions 11 ′ and 11 ″ along the vertical and horizontal directions.
Because it occupies a large part of the entire overlapping inner surface, there is no need to provide an unnecessary wiring area around such an effective display area, and the effective display area is maximized even when the external shape is almost the same as that of the conventional product. Can be extended to near.

FIG. 8 is a schematic perspective view showing a front side of a liquid crystal display module according to a third embodiment as one embodiment of the present invention, and FIG. 9 is a rear side of the liquid crystal display module shown in FIG. FIG. 10 is a schematic perspective view showing
Main part enlarged sectional view showing an enlarged section along the line II-II,
FIG. 11 is an exploded perspective view shown for explaining the assembled form of the liquid crystal display module shown in FIGS. 8 to 10. Hereinafter, the liquid crystal display module M3 according to the third embodiment will be briefly described with reference to these drawings. Note that members having the same functions as those according to the first and second embodiments are given the same names and the same reference numerals, and detailed description is omitted.

As shown in FIGS. 8 to 10, the liquid crystal display module M3 according to the third embodiment has the same configuration as the liquid crystal display module M1 according to the first embodiment, but in the following points. Different. That is, the liquid crystal display module M3 is connected to the outside on the back surface side of the extension portion 11, but the IC chip 30 and the transparent electrode pattern 1 are connected.
2 and 22 are directly connected via an anisotropic conductive adhesive 70 on the exposed surface side of the extension portion 11. Therefore, the extension 11
The bumps 30a for input of the IC chip 30
The external connection pattern 17 is formed so as to correspond to the external communication pattern 17, and the external connection terminal pattern 18 is formed on the rear surface of the extension portion 11 so as to correspond to the external communication pattern 17. The connection terminal portion 17a of the external communication pattern 17 and the external connection terminal pattern 18 are connected to each other via bonding wires 15 as shown in FIG.

According to such a configuration, for the connection with the outside, the extension part 11 is not allocated to the exposed surface of the extension part 11 with a relatively large space unlike the conventional product.
Can be used effectively, so that the width dimension W3 of the extension portion 11 can be reduced somewhat as compared with the conventional product.

Next, FIG. 12 is a schematic perspective view showing a front side of a liquid crystal display module according to a fourth embodiment as one embodiment of the present invention, and FIG. 13 is a rear view of the liquid crystal display module shown in FIG. FIG. 14 is a schematic perspective view showing the side.
FIG. 15 is a sectional view showing a section taken along line III-III in FIG.
FIG. 15 is an enlarged sectional view of a main part of the cross section shown in FIG. 14. Hereinafter, a liquid crystal display module M4 according to the fourth embodiment will be briefly described with reference to these drawings. Members having the same functions as those according to the second embodiment are given the same names and the same reference numerals, and detailed description is omitted.

As shown in FIGS. 12 to 15, the liquid crystal display module M4 according to the fourth embodiment has the same configuration as the liquid crystal display module M2 according to the second embodiment. Are different. That is, in the liquid crystal display module M4, the IC chip 30 is mounted on the back surface side of the extension portions 11 'and 11 ", and the IC chip 30 is located near the center of the outer surface of the substrate 10 facing the inner surface portion. The liquid crystal display module M4 is largely different from the second embodiment in that
The point is that light is guided toward the inner surface while being reflected on the substrate 10 side on which the C chip 30 is mounted, and the reflected light is emitted from the other substrate 20. Therefore, on the outer surface of the substrate 10 on which the IC chip 30 is mounted, as shown in FIGS. 14 and 15, a reflection layer 19a made of, for example, aluminum or the like is formed from above the polarizing plate 16 adhered thereto. . The reflection layer 19a may be formed directly on the outer surface of the substrate 10 without attaching the polarizing plate 16. Further, the reflection layer 19
An insulating layer 19b made of, for example, a polyimide resin is formed on the surface of a. IC connection pattern 14
And the external connection pattern 13 are formed on the surface of the insulating layer 19b. Further, the entire outer surface of the substrate 10 is formed with a rough surface so that the light reflected by the reflective layer 19a is efficiently guided to the inner surface, and the substrate 10 having such a rough outer surface is formed of a conductive material. Serves as a light plate. In short, the IC chip 30 faces the opposite side to the light traveling direction with the boundary between the reflective layer 19a and the insulating layer 19b so as not to block the light guided while being reflected from the side of the substrate 10 to the inner surface. Has been implemented.

Further, FIG. 16 is an exploded perspective view for explaining an assembling mode of the liquid crystal display module M4 shown in FIGS. 12 to 15, and FIG. 17 shows a main part in the assembling mode shown in FIG. It is a principal part sectional view, and as shown in these figures, the liquid crystal display module M4 is fixed to the board component 80 via the bezel 81 without requiring a light guide plate as a separate component. On the side of the place where the liquid crystal display module M4 is fixed in the board component 80,
Light sources 84, such as LEDs, are arranged.
Are reflected by the reflective layer 19a formed on the outer surface of the substrate 10 and guided to the inner surface. A reflection member 81b is provided inside the bezel 81 so as to guide the light from the light sources 84 to the liquid crystal display module M4 side.
Are provided appropriately.

Therefore, according to the liquid crystal display module M4 having the above configuration, the extension portions 11 'and 11 "are not necessarily required.
It is not necessary to mount the IC chip 30 facing the rear surface side of the substrate 10, and the IC chip 30 can be mounted at an arbitrary position on the outer surface of the substrate 10.
1 "is a width dimension enough to join one end of the bonding wire 15 to the transparent electrode patterns 12 and 22, for example, 1 mm.
The width can be made extremely short. Thus, in the liquid crystal display module M4 in which the extension portions 11 'and 11 "are cut off, the effective display area can be further expanded more than the liquid crystal display module M2 according to the second embodiment.

Next, FIG. 18 is a schematic perspective view showing the back side of a liquid crystal display module according to a fifth embodiment as one embodiment of the present invention, and FIG. 19 is taken along the line IV-IV in FIG. It is the principal part expanded sectional view which expanded and showed the cross section. Less than,
The liquid crystal display module M5 according to the fifth embodiment will be briefly described with reference to these drawings. Note that the fourth
Members having the same functions as those according to the first embodiment have the same names and the same reference numerals, and detailed descriptions thereof will be omitted.

As shown in FIGS. 18 and 19, the liquid crystal display module M5 according to the fifth embodiment has the same configuration as the liquid crystal display module M4 according to the fourth embodiment. Are different. That is, the liquid crystal display module M5 mounts the IC chip 30 together with the electronic components such as the chip resistor R and the capacitor C in the vicinity of the center on the outer surface of the substrate 20 which is separate from the extension portions 11 ′ and 11 ″. This liquid crystal display module M5 is largely different from the fourth embodiment in that the smaller substrate 2 on which the IC chip 30 and the like are mounted is mounted.
0 is on the display back side, and the substrate 10 integrated with the extension portions 11 ′ and 11 ″ is on the display front side. Therefore, the outer surface of the substrate 20 on the rear side is shown in FIG. As described above, a reflective layer 19a made of, for example, aluminum is formed from above the polarizing plate 16 adhered thereto, and an insulating layer 19b made of, for example, a polyimide resin is formed on the surface of the reflective layer 19a. The IC connection pattern 14, the external connection pattern 13, and the like are formed on the surface of the insulating layer 19b.

The entire outer surface of the substrate 20 is
The surface is formed in a rough surface so that the light reflected by a is efficiently guided to the inner surface. Furthermore, the connection terminal portion 14b of the IC connection pattern 14 is
The electrode terminals 12a and 22a are formed near the edge of the substrate 20 so as to correspond to the electrode terminals 12a and 22a. The electrode terminals 12a and 22a and the connection terminals 14b are connected via bonding wires 15. It is connected in a step shape.

Therefore, the liquid crystal display module M5 according to the fifth embodiment can greatly expand the effective display area, similarly to the fourth embodiment.

It should be noted that the present invention is not limited to the above-described first to fifth embodiments, but may of course be other embodiments.

In each of the embodiments, the glass substrates 10 and 20 are used. However, if the glass substrates 10 and 20 are thick enough to mount the IC chip 30, they may be replaced with film substrates.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a front side of a liquid crystal display module according to a first embodiment as one embodiment of the present invention.

FIG. 2 is a schematic perspective view showing the back side of the liquid crystal display module shown in FIG.

FIG. 3 is a sectional view showing a section taken along line II of FIG. 1;

FIG. 4 is an enlarged sectional view of a main part of the cross section shown in FIG.

FIG. 5 is an exploded perspective view shown for explaining an assembled form of the liquid crystal display module shown in FIGS. 1 to 4;

FIG. 6 is a schematic perspective view showing a front side of a liquid crystal display module according to a second embodiment as one embodiment of the present invention.

FIG. 7 is a schematic perspective view showing the back side of the liquid crystal display module shown in FIG.

FIG. 8 is a schematic perspective view showing a front side of a liquid crystal display module according to a third embodiment as one embodiment of the present invention.

FIG. 9 is a schematic perspective view showing the back side of the liquid crystal display module shown in FIG.

FIG. 10 is an enlarged cross-sectional view of a main part, showing a cross-section along line II-II of FIG. 8 in an enlarged manner.

FIG. 11 is an exploded perspective view for explaining an assembled form of the liquid crystal display module shown in FIGS. 8 to 10;

FIG. 12 is a schematic perspective view showing a front side of a liquid crystal display module according to a fourth embodiment as one embodiment of the present invention.

FIG. 13 is a schematic perspective view showing the back side of the liquid crystal display module shown in FIG.

FIG. 14 is a sectional view showing a section taken along line III-III in FIG. 12;

FIG. 15 is an enlarged sectional view of a main part of the cross section shown in FIG. 14;

FIG. 16 is an exploded perspective view shown for explaining a built-in mode of the liquid crystal display module shown in FIGS. 12 to 15;

17 is a cross-sectional view of a main part showing a main part in the assembled form shown in FIG. 16;

FIG. 18 is a schematic perspective view showing a rear side of a liquid crystal display module according to a fifth embodiment as one embodiment of the present invention.

19 is an enlarged cross-sectional view of a main part, showing a cross-section along line IV-IV of FIG. 18 in an enlarged manner.

FIG. 20 is a perspective view showing a conventional example of a liquid crystal display module belonging to the COG mode.

[Explanation of symbols]

10, 20 Glass substrate (transparent substrate) 11, 11 ', 11 "extension portion 12, 22 Transparent electrode pattern 13 External connection pattern 14 IC connection pattern 15 Bonding wire (connection member) 16, 26 Polarizing plate 17 External communication Pattern 18 External connection terminal pattern 19a Reflective layer 19b Insulating layer 30 IC chip 60 Insulating resin 70 Anisotropic conductive adhesive 83 Anisotropic conductive rubber (anisotropic conductive material) M1 to M5 Liquid crystal display module

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H092 GA48 GA49 GA50 GA51 GA60 HA04 HA26 NA15 NA18 NA25 PA12 QA10 5G435 AA18 BB12 CC09 EE33 EE36 EE41 EE42 EE45 FF03 FF05 HH02 HH12

Claims (10)

[Claims] 1. One of two transparent substrates superimposed as a liquid crystal display surface is provided with an integrated extending portion such that at least one side protrudes from the other substrate. A liquid crystal display module on which an IC chip is mounted using either one of the above as a mounting substrate, wherein the IC chip is mounted facing a back surface side opposite to an exposed surface of the extension portion; While continuing from the overlapping inner surface of the transparent substrate,
The transparent electrode pattern in which an electrode terminal portion is formed in the vicinity of an edge on the exposed surface side of the extension portion, and the above-mentioned portion corresponding to the electrode terminal portion while being continuous from a mounting portion serving as a connection portion with the IC chip An IC connection pattern in which a connection terminal portion is formed near an edge on the back surface side of the extension portion, and connected to both the electrode terminal portion and the connection terminal portion;
A connection member provided so as to wrap around the outer edge of the extension; and, in order to connect the IC chip to the outside on the back side of the extension, while continuing from the mounting location of the IC chip, A liquid crystal display module comprising: an external connection pattern in which an external connection terminal portion is formed at a predetermined location on the back surface side of the extension portion. 2. One of two transparent substrates superimposed as a liquid crystal display surface is provided with an integrated extending portion so that at least one side protrudes from the other substrate. A liquid crystal display module on which an IC chip is mounted using one of the transparent substrates as a mounting substrate, wherein the IC chip is mounted facing an exposed surface side of the extending portion, and the two transparent substrates overlap each other. While continuing from the inner surface,
An electrode terminal portion serving as a connection portion with the IC chip, a transparent electrode pattern formed at a mounting portion of the IC chip, and a vicinity of an edge on an exposed surface side of the extension portion while continuing from the mounting portion of the IC chip; An external communication pattern in which a communication terminal portion is formed on the back surface side opposite to the exposed surface of the extension portion;
An external connection terminal pattern formed near the edge on the back surface side of the extension corresponding to the connection terminal in order to establish a connection between the C chip and the outside; the connection terminal and the external connection terminal A liquid crystal display module, comprising: a connecting member connected to both the pattern and the outer periphery of the extended portion. 3. One of two transparent substrates superimposed as a liquid crystal display surface is provided with an integrated extending portion such that at least one side of the transparent substrate protrudes from the other substrate. A liquid crystal display module mounted with an IC chip using either one of the above as a mounting substrate, wherein the IC chip is mounted on a substrate integrated with the extension portion as a mounting substrate facing an outer surface thereof. While continuing from the overlapping inner surface of the two transparent substrates,
A transparent electrode pattern in which an electrode terminal portion is formed near an edge on the exposed surface side of the extending portion; and a transparent electrode pattern formed on an outer surface of the mounting substrate to reflect light from the mounting substrate side to the inner surface portion side. Reflective layer, an insulating layer formed on the surface of the insulating layer so as to cover the reflective layer, and an IC chip mounting portion formed on the surface of the insulating layer and serving as a connection portion with the IC chip. And an IC connection pattern in which a connection terminal portion is formed near an edge on the opposite side of the exposed surface of the extension portion corresponding to the electrode terminal portion while continuing from the electrode terminal portion, and the electrode terminal portion and the connection terminal portion. Connected to both
A connection member provided so as to wrap around the outer edge of the extending portion; and a connection member formed on the surface of the insulating layer for connection between the IC chip and the outside on the outer surface side of the mounting substrate. While continuing from the mounting location of the IC chip,
A liquid crystal display module, comprising: an external connection pattern in which an external connection terminal portion is formed at a predetermined position on an outer surface side of the mounting substrate. 4. One of two transparent substrates superimposed as a liquid crystal display surface is provided with an integrated extending portion so that at least one side protrudes from the other substrate. A liquid crystal display module on which an IC chip is mounted using either one of the above as a mounting substrate, wherein the IC chip is mounted on a substrate separate from the extending portion as a mounting substrate facing an outer surface thereof. While continuing from the overlapping inner surface of both transparent substrates,
A transparent electrode pattern in which an electrode terminal portion is formed in the vicinity of an edge on the exposed surface side of the extending portion; and a transparent electrode pattern formed on an outer surface of the mounting substrate to reflect light from the mounting substrate side to the inner surface portion side. Reflective layer, an insulating layer formed on the surface so as to cover the reflective layer, and an IC chip mounting portion formed on the surface of the insulating layer and serving as a connection portion with the IC chip And an IC connection pattern in which a connection terminal portion is formed near an outer edge of the mounting substrate corresponding to the electrode terminal portion, and both the electrode terminal portion and the connection terminal portion. Connected
A connection member provided to connect these terminals in a step-like manner, and formed on the surface of the insulating layer in order to connect the IC chip to the outside on the outer surface side of the mounting board, While continuing from the mounting location of the IC chip,
A liquid crystal display module, comprising: an external connection pattern in which an external connection terminal portion is formed at a predetermined position on an outer surface side of the mounting substrate. 5. The liquid crystal display module according to claim 3, wherein the outer surface of the mounting substrate is roughened so as to guide the light reflected by the reflective layer toward the inner surface. . 6. The extension portion has an L-shaped exposed surface extending in the vertical and horizontal directions when two sides intersecting each other protrude from the other substrate, and the vertical and horizontal exposed surfaces have electrode terminals of the transparent electrode pattern. 6. The liquid crystal display module according to claim 1, wherein the portions are distributed as a segment electrode and a common electrode. 7. The liquid crystal display module according to claim 1, wherein said IC chip is bonded to a mounting portion via an anisotropic conductive adhesive. 8. The liquid crystal display module according to claim 1, wherein an anisotropic conductive material is used for the connection with the outside. 9. The liquid crystal display module according to claim 1, wherein said connection member is a wire formed by wire bonding so as to connect between predetermined terminal portions. 10. The liquid crystal display module according to claim 9, wherein the wire is sealed with an insulating resin near the extension.