JP2002318548A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the wirings in the periphery of a liquid crystal display device by downsizing the frame in the periphery of a display area in the liquid crystal display device constituted so as to drive a plurality of scanning lines dividedly. SOLUTION: In the liquid crystal display device X, which is provided with a 1st substrate 1, a plurality of scanning lines 3 extending in the main scanning direction A and arranged on the 1st substrate, a 2nd substrate 2, a plurality of scanning lines 4 extending in the subordinate scanning direction B and arranged on the 2nd substrate 2, and a plurality of driving ICs 60, 61 for individually driving the plurality of scanning lines 4 divided into a plurality of groups for every group and in which the display area 34 is constituted of a plurality of pixels arranged in a matrix form, a plurality of external connection terminals 45, 46 connected in conduction to a plurality of the driving ICs 60, 61 are arranged to be gathered in one place on either one of the 1st and the 2nd substrates 1, 2. Preferably, all of the external connection terminals 45, 46 are connected in conduction to a single connector cable 8 patterned with a plurality of patterned wiring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device which can be driven by dividing a plurality of scanning lines.

[0002]

2. Description of the Related Art FIGS. 6 and 7 show a liquid crystal display device.
As shown in FIG. The liquid crystal display device Y shown in this figure is configured for monochrome display, and includes a polarizing plate 90 and first and second rectangular substrates 91 and 92. The polarizing plate 90 is disposed on one surface 91a of the first substrate 91, and transmits only light that vibrates in a specific direction, restricts light incident on the first substrate 91 from outside, Alternatively, the light emitted from the first substrate 91 to the outside is restricted.

On the other surface 91b of the first substrate 91, a plurality of strip-shaped transparent electrodes 93 extending in the main scanning direction A are formed. On one surface 92a of the second substrate 92, each transparent electrode 93 is formed.
A plurality of strip-shaped reflective electrodes 94 extending in the sub-scanning direction B orthogonal to the above are formed. A liquid crystal 95 is sealed between these substrates 91 and 92, and a plurality of pixels are specified by an intersecting region between the transparent electrode 93 and the reflective electrode 94, and these pixels are arranged in a matrix to form a display area. 96
Is composed. Orientation films 97A and 97B are arranged on the surfaces of the transparent electrode 93 and the reflection electrode 94, respectively, and the twisted state of the liquid crystal (liquid crystal molecules) 95 is defined by the orientation films 97A and 97B.

[0006] In the liquid crystal display device Y shown in FIG. 6, half of the reflective electrodes 94 arranged on the upper side of FIG.
It is configured to be driven separately by 8A and 98B. On the other hand, various signals and the like are supplied to each transparent electrode 93 by two drive ICs 98C and 98D arranged on the upper and lower sides in FIG.

The input to each of the drive ICs 98A to 98D and the output from each of the drive ICs 98A to 98D are
A plurality of external connection terminals 98 electrically connected to C98A to 98D
a, 98b, 98c, 98d. The external connection terminals 98a to 98d are formed on the peripheral portion of the second substrate 92, and each of the drive ICs 98A, 98B, 98C,
A plurality of terminal groups 98 are collected for each 98D.
A ', 98B', 98C ', 98D'. Each of the terminal groups 98A 'to 98D' includes connector cables 99A, 99B, 99 on which wiring (not shown) is formed in a pattern.
C and 99D.

[0006]

In the liquid crystal display device Y,
As clearly shown in FIG. 6, two driving ICs 98A to 98D, two for the transparent electrode and two for the reflective electrode, are arranged along three sides of the second substrate 92, and A group 98A'-98D 'of a plurality of external connection terminals 98a-98d corresponding to the respective drive ICs 98A-98D is formed on the second substrate 9.
2 are provided along the three sides. Therefore, in the conventional liquid crystal display device Y, it is necessary to secure a relatively large area (frame) around the display area 96. Therefore, if the area of the display area 96 is standardized, the size of the liquid crystal display device Y is increased, or the size of the second substrate 9 is reduced.
Standardizing the size of 2 results in the display area 96 being narrowed.

Further, if connector cables 99A to 99D are used in correspondence with the respective drive ICs 98A to 98D, when the liquid crystal display device Y is incorporated in a housing or the like, the surroundings of the liquid crystal display device Y become crowded. Become. In particular, in a liquid crystal display device Y incorporated in a relatively small housing such as a mobile phone housing, it is not preferable from the viewpoint of space efficiency that the periphery of the liquid crystal display device Y be crowded.

The present invention has been made under such circumstances, and in a liquid crystal display device configured to drive by dividing a plurality of scanning lines, a frame around a display area is formed. It is an object to reduce the size and to simplify the wiring around the liquid crystal display device.

[0009]

DISCLOSURE OF THE INVENTION The present invention employs the following technical means to solve the above-mentioned problems.

[0010] A liquid crystal display device provided by the present invention comprises a first substrate, a plurality of signal lines extending in the main scanning direction and provided on the first substrate, and a plurality of signal lines facing the first substrate. A second substrate, a plurality of scanning lines extending in the sub-scanning direction and provided on a surface of the second substrate facing the first substrate, and a plurality of scanning lines between the first substrate and the second substrate. And a plurality of driving ICs that individually drive the plurality of scanning lines divided into a plurality of groups for each group, and are displayed by a plurality of pixels arranged in a matrix. A liquid crystal display device having an area, wherein a plurality of external connection terminals electrically connected to the plurality of drive ICs are collected at one of the first substrate and the second substrate. It is characterized by being provided in the state It is.

In this configuration, a plurality of external connection terminals are gathered in one place. For this reason, in the present invention, the area to be secured around the display area (as compared to the case where the plurality of external connection terminals are provided on the first or second substrate as a plurality of terminal groups dispersed in the peripheral portion). Frame) can be reduced. For example, when the first or second substrate has a rectangular shape, a plurality of terminal portions can be provided along one side thereof. In this case, a plurality of regions for external connection terminals are provided on the first or second substrate. It may be provided only in a region along one side of the first or second substrate. Therefore, compared to the conventional case where a plurality of terminal groups are provided along a plurality of sides,
The frame can be reduced.

In addition, by providing a plurality of external connection terminals at one location, all of the plurality of external connection terminals are electrically connected to one connector cable on which a plurality of wirings are formed in a pattern, and a plurality of drive ICs are provided. Can be driven by one connector cable. In this case, since the number of connector cables to be used can be minimized, wiring around the liquid crystal display device is simplified, and space efficiency in a housing in which the liquid crystal display device is incorporated is improved. Will be able to

The liquid crystal display device of the present invention can enjoy the above-mentioned effects irrespective of the passive drive system or the active drive system, or of the transmission type or the reflection type. . Of course, in order to obtain such effects, it does not matter whether the liquid crystal display device is configured for monochrome display or for liquid crystal display.

When the liquid crystal display device of the present invention is of a reflection type and employs a passive driving method, it is preferable that a plurality of signal lines are formed as transparent electrodes and a plurality of scanning lines are formed as reflection electrodes. . In this configuration, the intersection of the transparent electrode and the reflective electrode forms one pixel. The reflective electrode is preferably formed of a material having a low specific resistance, such as aluminum or silver.

In a preferred embodiment, the plurality of scanning lines are divided into two groups, a first group and a second group, which are groups of scanning lines adjacent to each other, and the first group is a first driving IC. As a result, the second
The group is configured to be driven by being divided into two by the second drive IC. In this case, the first drive IC and the second drive IC each have, for example, a long rectangular main surface and a plurality of signal line output terminals and a plurality of scans along one longitudinal edge of the main surface. One provided with both line output terminals is used. These drive ICs are arranged, for example, in parallel with the display area in the direction in which the plurality of scanning lines extend.

In this configuration, since a plurality of signal lines and scanning lines are driven by only two driving ICs, even when a plurality of scanning lines are divided and driven, a space for mounting the driving ICs is reduced. It is possible to further reduce the frame by reducing the size.

Half or substantially half of the scanning lines forming the first group and the second group are drawn out of the display area from one end of the scanning lines, for example, and the periphery of the display area. The remaining scanning lines which are electrically connected to the scanning line output terminal of the first driving IC or the second driving IC via the scanning line wiring extending along the first group and the second group constitute the first group and the second group. Scans the first driving IC or the second driving IC via a scanning line extending from the other end of the scanning line to the outside of the display area and extending along the periphery of the display area. Conducted with the line output terminal.

In this configuration, compared to the case where the wiring of each group is pulled out from the same side of the display area, the layout of the ends of the scanning line wiring for conducting with the drive IC and the wiring leading to these ends are provided. Can be simplified, and the frame can be narrowed from this point as well.

In order to realize such a wiring pattern, in the first and second drive ICs, a plurality of signal line output terminals are provided, for example, at the center of one longitudinal edge of the main surface, A plurality of scanning line output terminals are provided, for example, at both ends of one longitudinal edge.

In order to more reliably enjoy the effects of simplification of wiring and narrowing of the frame, a plurality of input terminals are provided on the other longitudinal edges of the main surfaces of the first drive IC and the second drive IC. And the plurality of external connection terminals are provided in a row along a second longitudinal edge of the second drive IC, and the plurality of external connection terminals and the first drive IC are provided.
It is preferable that the input wiring for the drive IC, which is electrically connected to the input terminal, is formed so as to surround the scanning wiring.

In this case, the scanning line wiring and the driving I
It is preferable that the input wiring for C is formed of a good conductor such as aluminum or silver so that the sheet resistance at a thickness of 0.5 μm is 5Ω or less. The transparent electrode is, for example, I
It is made of TO and has a large sheet resistance of 20Ω at a thickness of 0.5 μm, whereas the scanning line wiring and the drive IC input wiring of the present invention have remarkably low specific resistance. Therefore, even if the wiring width is reduced, the wiring width can be sufficient to transmit and receive power and signals, and this also promotes narrowing of the frame.

An IC having a memory function and a logical operation function may be mounted on the connector cable so as to conduct with a plurality of drive ICs. If the memory function and the logical operation function are assigned to other ICs, the structure of the drive IC can be simplified and the drive IC can be downsized. As a result, the area for mounting the drive IC can be further reduced, and the frame can be narrowed. Will be able to do it.

Also, for example, 15
While it is necessary to supply a voltage of about V, an IC having a memory function and a logic function can be driven at about 5 V, for example. For this reason, if the driving IC itself has a memory function and a logic function that can be driven at a low voltage, the driving IC becomes expensive, but if the function that can be driven at a low potential is realized by another IC, the driving IC Costs are reduced,
The degree of the reduction is based on ICs with memory functions and logic functions.
Greater than the cost of a single unit. Therefore, if the memory function and the logic function are assigned to an IC different from the driving IC,
The cost can be reduced.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be specifically described below with reference to FIGS.
Here, FIG. 1 is a perspective plan view showing an example of the liquid crystal display device according to the present invention, FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1, FIG. 3 is a bottom view of the first substrate, and FIG. FIG. 5 is an exploded perspective view of a main part of the connector cable.

The liquid crystal display device X shown in FIGS. 1 and 2
Is a reflection type configured for monochrome display, and adopts a passive drive system. The liquid crystal display device X has a first substrate 1 and a second substrate 2 which are formed in a rectangular shape by, for example, an acrylic resin or glass.

A plurality of strip-shaped transparent electrodes (signal lines) 3 are provided on a surface 10 of the first substrate 1 facing the second substrate 2 so as to extend in the main scanning direction A. Each transparent electrode 3 is divided in the middle in the longitudinal direction, and is constituted by a first transparent electrode 3A and a second transparent electrode 3B.
These transparent electrodes 3 are formed by, for example, forming a film of indium oxide (ITO) to which a trace amount of tin is added by sputtering or the like, and then performing an etching process.

On the surface 20 of the second substrate 2 facing the first substrate 1, a strip-shaped reflective electrode (scanning line) 4 extends in the width direction of each transparent electrode 3 (sub-scanning direction B). A plurality is provided. The surface of these reflective electrodes 4 functions as a reflective surface, and is formed by performing an etching process after depositing a good electrical material such as aluminum or silver. A region where the transparent electrode 3 and the reflective electrode 4 intersect constitutes one pixel, a plurality of pixels are arranged in a matrix, and a rectangular display area 34 is set by these pixels.

As shown in FIG. 2, in the liquid crystal display device X, alignment films 50 and 51 are provided so as to cover each transparent electrode 3 and each reflective electrode 4. These alignment films 50 and 51 are provided to impart twist to liquid crystal molecules, and are formed by rubbing a polyimide film or the like. A nematic liquid crystal is sealed between these alignment films 50 and 51 to form a liquid crystal layer 52, and liquid crystal molecules constituting the liquid crystal layer 52 are twisted by the alignment films 50 and 51.

A polarizing plate 53 is laminated on the non-opposite surface 11 of the first substrate 1 opposite to the opposing surface 10. Polarizing plate 5
Reference numeral 3 indicates that only light that vibrates in a specific direction is transmitted, and for example, polarization selectivity is given by stretching a transparent resin to which iodine or a dye is added.

A plurality of transparent electrode wirings 40 and 41 are formed on the second substrate 2 so as to be arranged along the upper side and the lower side of the display area 34 in FIG. 1, and the first and second lines are formed along the upper side and the lower side. Two drive ICs 60 and 61 are arranged.

As is clearly shown in FIG. 2, one end portions 40a and 41a of the plurality of transparent electrode wirings 40 and 41 are disposed immediately below the end portions 3a of the plurality of transparent electrodes 3 and extend in the sub-scanning direction B. It is lined up along the line. Wiring 40, 4 for transparent electrode
On one end 40a, 41a of one, a bump 41A is formed. End 3a of transparent electrode 3 and wiring 4 for transparent electrode
The bumps 41 are provided between the first ends 40a and 41a.
A and conductive connection via the conductive ball 70.

The conductive balls 70 are caused by the anisotropic conductive adhesive 7. This anisotropic conductive adhesive 7 is
The conductive balls 70 are dispersed in a resin component 71 made of a thermosetting resin or the like. In the conductive adhesive 7, the anisotropic conductive adhesive 7 was interposed between the region of the first substrate 1 where the transparent electrode wiring 40 was formed and the region of the second substrate 2 where the transparent electrode 3 was formed. If a force is applied between the substrates 1 and 2 in the compression direction in this state, the end 3a of the transparent electrode 3
The conductive ball 70 is selectively interposed between the transparent electrode wires 40 and 41 and one end portions 40a and 41a of the transparent electrode wires 41 and 41, respectively. In this state, if the resin component 71 is thermally cured, the end portions 3a of the transparent electrode 3 and the one end portions 40a, 41 of the transparent electrode wirings 40, 41 are formed.
a is fixed in a state where it is selectively conducted.

On the other hand, the other end portions 40b and 41b of the plurality of transparent electrode wirings 40 and 41 are also arranged in a row along the sub-scanning direction B. These other end portions 40b, 41b
Are electrically connected to the driving ICs 60 and 61.

The first and second driving ICs 60 and 61 are arranged so as to be parallel to each other along the upper side and the lower side of the display area 34 in FIG. First drive IC 6
0 is responsible for driving the upper half of the reflective electrodes 4 and the first transparent electrodes 3A in FIG.
61 is a lower half number of the reflective electrode 4 and the second transparent electrode 3B
, And the plurality of transparent electrodes 3 and the reflective electrodes 4 are driven by being divided into two groups.

Each of the drive ICs 60 and 61 has a rod-like shape as a whole as shown in FIG. 4, and has a long rectangular main surface 60A (61A). Main surface 60A
The output terminal 60a (61) for a transparent electrode (signal line) is provided at the center of one longitudinal edge 60B (61B) of the (61A).
a) are provided in a row, and a portion from a short end thereof is provided with a reflective electrode (scanning line) output terminal 60b.
A plurality of (61b) are provided in a line. Main surface 6
0A (61A) has a plurality of input terminals 60c arranged in a row at the center at the other longitudinal edge 60C (61C).
(61c) are provided, and a plurality of dummy terminals 60d (61d) are provided at a portion from the short end thereof. Output terminals 60a (61a), 60b (61b),
Input terminal 60c (61c) and dummy terminal 60d
(61d) is formed in the shape of a bump whose height is uniformly arranged. These bumps, for example,
The wafers 60 and 61 can be collectively formed by performing a plating process in a wafer process.

As expected from FIGS. 1 and 4, the output terminals 60b (61) for the reflective electrodes of the driving ICs 60 and 61 are provided.
b) shows the reflection electrode wirings 42A, 42B, 43A, 43
It is electrically connected to the corresponding reflection electrode 4 via B.
The reflective electrode wirings 42A and 43A for the upper half of the reflective electrodes 4 forming each group are drawn out from the left side of FIG. 1, and the reflective electrode wirings 42B and 43B for the lower half of the reflective electrodes forming each group are shown in FIG. After extending from the right side of the display area 1, it extends along the left side or right side of the display area. Wiring 42A, 42B, 43A, 43 for each reflective electrode
The ends 42a, 42b, 43a, 43b of B are formed so as to be aligned with the other ends 40b, 41b of the plurality of transparent electrode wirings 40, 41. Wiring for transparent electrode 4
0, 41 and the end portions 42a, 42b of the reflective electrode wirings 42A, 42B, 43A, 43B.
In the columns b, 43a and 43b, the reflective electrode wirings 42A,
Ends 42a, 42b, 43 of 42B, 43A, 43B
a and 43b are arranged so as to be located at both ends.

The reflective electrode wirings 42A, 42 of each group
B, 43A, and 43B are drawn from the left side and the right side of the display area 34, respectively.
The frame can be narrowed as compared with the case where the wiring is drawn out from one side. The wirings 42A, 42B, 43A, 43 for the reflection electrodes are formed from two opposing sides of the display area.
It is better to draw B out of the reflective electrode wirings 42A, 42B, 43A, 43B for conducting with the driving ICs 60, 61.
Of the end portions 42a, 42b, 43a, 43b, and the wirings 42A, 42B, 43A, 43A for the reflective electrodes up to the end portions 42a, 42b, 43a, 43b.
This is because the routing of B can be simplified.

The reflective electrode wirings 42A, 42B, 43A,
The ends 42a, 42b, 43a, 43b of 43B are not clearly shown in the drawing, but the transparent electrode wirings 40, 41
Similarly to the other end portions 40b and 41b of the anisotropic conductive adhesive 7,
Are electrically connected to each other via the conductive ball 70 of the first embodiment. Output terminals 60a for the transparent electrodes of the driving ICs 60 and 61,
61a and the output terminals 60b and 61b for the reflective electrode are formed in the shape of a bump.
Conductive connection can be selectively made between the end portions 42a, 42b, 43a, and 43b (the reflective electrode 4) of the 3B.

The wirings 42A, 42B for the reflection electrodes
Like the reflective electrode 4, 43A and 43B are formed by depositing a good electric body such as aluminum or silver and then performing an etching process. Therefore, the reflection electrode wiring 4
2A, 42B, 43A, 43B can be formed simultaneously with the reflection electrode 4. The reflective electrode wiring 42A,
42B, 43A, 43B are formed such that the sheet resistance at a thickness of, for example, 0.5 μm is 5Ω or less.

If the wirings 42A, 42B, 43A, 43B for the reflective electrodes are formed of a good electrical material in this manner, even if the width of each wiring is sufficiently small, it can be sufficient for supplying signals and electrodes. Yes, the wirings 42A, 42B, 43A, 4
The width of the entire bundle of 3B can be reduced. As a result, the area (frame) to be secured for the reflective electrode wirings 42A, 42B, 43A, 43B around the display area 34 can be reduced, and the liquid crystal display device X
Can achieve a small size.

Input terminals 60c of the driving ICs 60 and 61
(61c) is connected to a plurality of external connection terminals 45, 46 (see FIG. 1) gathered at one place on the lower edge of the second substrate 2 via drive IC input wirings 47, 48. I have.
Bumps 45A (46A) are provided on these external connection terminals 45 and 46, as best seen in FIG.

As shown in FIG. 1, the input wiring 47 for one driving IC is connected to the display area 34 and the wiring 4 for the reflective electrode.
It is formed so as to surround 2A, 42B, 43A, 43B. The end portion 47A of the drive IC input wiring 47 is formed of a row gathered at the upper edge of the second substrate 2 so as to be electrically connected to the input terminal 60c when the drive IC 60 is mounted on the second substrate 2. It is arranged in a shape. The other drive IC wiring 48 extends linearly, and when the drive IC 61 is mounted on the second substrate 2 at the end 48a, the input terminal 6
They are arranged in rows so as to be able to conduct with 1c. Drive I
Between the end portions 47a and 48a of the C input wirings 47 and 48 and the input terminals 60c and 61c of the driving ICs 60 and 61,
They are electrically conductively connected via conductive balls 70 caused by the anisotropic conductive adhesive 7 (see FIG. 2).

As can be seen from FIGS. 1 and 2, all of the plurality of external connection terminals 45 and 46 are electrically connected to one connector cable 8. Connector cable 8
5, the same number of wires 80 as the external connection terminals 45 and 46 are formed as shown in FIG. 5, and the ends 80a of the wires 80 are arranged in a line along the edge of the connector cable 8. Are located. These ends 80a are provided at a pitch corresponding to the external connection terminals 45 and 46, and are shown in FIG.
Are electrically connected to the external connection terminals 45 and 46 via the conductive balls 70 of the anisotropic conductive adhesive 7.

Clock signals, image data, voltages, and the like are input to the external connection terminals 45 and 46 via the connector cable 8, and these are supplied to the drive IC wiring 42.
A, 42B, 43A, 43B via the driving ICs 60, 6
1 is supplied. The drive ICs 60 and 61 supply a voltage of a pulse width synchronized with the clock signal input from the external connection terminals 45 and 46 to the transparent electrode 3 and the reflective electrode 4 as a voltage value based on image data, and A state in which the twisted state of the constituent liquid crystal is released and a state in which the twisted state is maintained are selected.

If a single connector cable 8 is connected to drive the transparent electrodes 3 and the reflective electrodes 4 by a plurality of drive ICs 60 and 61, wiring (connector cables) around the liquid crystal display device X can be arranged. Is simplified.
As a result, space efficiency when the liquid crystal display device X is incorporated in the housing is improved, and the housing can be downsized. Further, the area to be secured for the connector cable 8 (the external connection terminals 45 and 46) can be reduced with respect to the second substrate 2, and the frame can be further narrowed.

As shown in FIG. 5, the connector cable 8
Has an IC 81 having a memory function and a logical operation function.
May be implemented. The IC 81 calculates a voltage and a timing to be supplied to the transparent electrode 3 and the reflective electrode 4 according to display contents. This IC 81 can be driven at, for example, about 5V. On the other hand, it is necessary to supply a voltage of, for example, about 15 V at the maximum to the transparent electrode 3 and the reflective electrode 4. For this reason, if the drive ICs 60 and 61 themselves have a memory function and a logical operation function that can be driven at a low voltage, the drive IC becomes expensive. However, if the function that can be driven at a low potential is realized by another IC 81, the drive IC becomes more expensive. Only drive IC6
The cost of the IC 81 having the memory function and the logical operation function is greater than that of the IC 81 having the memory function and the logical operation function. Therefore, if the memory function and the logical operation function are borne by the IC 81 different from the driving ICs 60 and 61,
Cost can be reduced. Further, if the memory function and the logical operation function are borne by another IC 81, the driving IC 6
The configuration of the driving ICs 60 and 61 can be reduced by simplifying the configuration of the driving ICs 60 and 61. As a result, the area for mounting the drive ICs 60 and 61 can be further reduced, and the frame can be narrowed.

In the liquid crystal display device X, as shown in FIG. 2, only the light component that oscillates in the characteristic direction of the light that has reached the polarizing plate 53 is transmitted through the polarizing plate 53 and becomes polarized.
The light enters the first substrate 1. This light enters the liquid crystal layer 52 after passing through the transparent electrode 3 and the alignment film 50. Then, when light enters a portion (pixel) where the twisted state of the liquid crystal molecules is released, the light passes through the alignment film 51 and then enters the reflective electrode 4 without changing the vibration direction. On the other hand, when light is incident on a portion (pixel) where the twisted state of the liquid crystal molecules is maintained, the light is incident on the reflective electrode 4 after the vibration direction is changed. The light incident on the reflective electrode 4 is reflected on the surface thereof and is incident on the polarizing plate 53 along a path opposite to the above. At this time, the light passing through the portion to which the voltage is applied cannot change its vibration direction, while the light passing through the portion to which no voltage is applied has its vibration direction changed.

Then, of the light incident on the polarizing plate 53,
Those whose vibration direction was not changed by the liquid crystal layer 52 pass through the polarizing plate 53, and those whose vibration direction was changed do not pass through the polarizing plate 53. Therefore, the pixel in which the twisted state of the liquid crystal molecules is maintained is displayed as black, and the pixel in which the twisted state of the liquid crystal molecules is released is displayed as white.
As a result, a desired image can be displayed by appropriately selecting a pixel to be displayed in black and a pixel to be displayed in white.

In the present embodiment, the liquid crystal display device which is configured as a reflection type and employs a passive drive system has been described. An active drive system may be adopted. Needless to say, a color filter may be arranged between the first substrate and the second substrate, or a dichroic dye may be dispersed in the liquid crystal layer to be configured for color display.

[Brief description of the drawings]

FIG. 1 is a perspective plan view showing an example of a liquid crystal display device according to the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a bottom view of the first substrate.

FIG. 4 is an overall perspective view of a driving IC.

FIG. 5 is an exploded perspective view of a main part of the connector cable.

FIG. 6 is a perspective plan view showing an example of a conventional liquid crystal display device.

FIG. 7 is a sectional view taken along line VII-VII in FIG.

[Explanation of symbols]

 X liquid crystal display device 1 first substrate 2 second substrate 3 transparent electrode (signal line) 34 display area 4 reflective electrode (scanning line) 40, 41 transparent electrode wiring 42A, 42B, 43A, 43B reflective electrode wiring 45 , 46 External connection terminals 47, 48 Input wiring for drive IC 52 Liquid crystal layer 60, 61 Drive IC 60A, 61A Main surface (of drive IC) 60a, 61a Output terminal for transparent electrode 60b, 61b Output terminal for reflective electrode 60c, 61c Input terminal 8 Connector cable 81 IC A Main scanning direction B Sub scanning direction

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Norihiro Imamura, Inventor No. 21 Saito Mizozaki-cho, Ukyo-ku, Kyoto City F-term (reference) 2H092 GA06 GA33 GA46 GA54 GA60 HA03 HA05 MA31 NA25 5C094 AA15 AA45 BA43 CA19 DB01 DB02 DB03 EA04 EA05 EA06 EA07 EB02 FB12 5G435 AA17 AA18 BB12 EE33 EE37 EE41 HH12 HH14

Claims (9)

[Claims] A first substrate; a plurality of signal lines extending in the main scanning direction and provided on the first substrate; a second substrate facing the first substrate; A plurality of scanning lines extending and provided on a surface of the second substrate facing the first substrate; a plurality of liquid crystal layers provided between the first substrate and the second substrate; And a plurality of driving ICs for individually driving the plurality of scanning lines divided into groups, and a plurality of driving ICs for each group, and a display area configured by a plurality of pixels arranged in a matrix. A plurality of external connection terminals electrically connected to the plurality of drive ICs are provided on one of the first substrate and the second substrate in a state of being gathered at one place. Characteristic liquid crystal display device. 2. The liquid crystal display device according to claim 1, wherein all of the plurality of external connection terminals are electrically connected to one connector cable in which a plurality of wirings are formed in a pattern. 3. The plurality of signal lines are transparent electrodes,
3. The liquid crystal display device according to claim 1, wherein the plurality of scanning lines are reflection electrodes. 4. The scanning line according to claim 1, wherein the plurality of scanning lines are a first group and a second group of a group of scanning lines adjacent to each other.
The first group is driven by a first driver IC, and the second group is driven by a second driver IC. The first driver IC and the second driver Each of the ICs has a long rectangular main surface, and is provided with both a plurality of signal line output terminals and a plurality of scanning line output terminals along one longitudinal edge of the main surface. There are
4. The liquid crystal display device according to claim 1, wherein the liquid crystal display device is arranged parallel to the display area along a direction in which the plurality of scanning lines extend. 5. 5. Half or substantially half of the scanning lines constituting the first group and the second group are drawn out of the display area from one end of these scanning lines, and The first group and the second group are electrically connected to a scanning line output terminal of the first driving IC or the second driving IC via a scanning line wiring extending along a peripheral edge of the display area. The remaining scanning lines are drawn out of the other end of these scanning lines to the outside of the display area, and are connected to the first drive IC via scanning line wiring extending along the periphery of the display area. 5. The liquid crystal display device according to claim 4, wherein said liquid crystal display device is electrically connected to a scanning line output terminal of said second drive IC. 6. The plurality of signal line input terminals are provided at the center of a longitudinal edge of the main surface, and the plurality of scanning line input terminals are provided at both ends of the longitudinal edge. The liquid crystal display device according to claim 4, wherein the liquid crystal display device is provided. 7. The first driving IC and the second driving IC.
A plurality of input terminals are provided on the other longitudinal edge of the main surface of C, and the plurality of external connection terminals are arranged in a row along the other longitudinal edge of the second drive IC. 6. The driving IC input wiring, which is provided and is electrically connected to the plurality of external connection terminals and the input terminal of the first driving IC, is formed in a pattern so as to surround the scanning line wiring. Or the liquid crystal display device according to 6. 8. The liquid crystal display device according to claim 7, wherein the scanning line wiring and the driving IC input wiring are formed of a good electrical material having a thickness of 0.5 μm and a sheet resistance of 5Ω or less. . 9. The connector cable includes an IC having a memory function and a logical operation function, wherein the plurality of drive I / Os are provided.
9. The semiconductor device according to claim 2, which is mounted so as to conduct with C.
The liquid crystal display device according to any one of the above.