JP2001091967A - Liquid crystal display device and electronic equipment using the same - Google Patents

Abstract

(57) Abstract: A liquid crystal device capable of forming electrodes relatively easily without increasing the space occupied by a liquid crystal panel even when there are many electrodes to be formed on each substrate. A display device and an electronic device using the same are provided. SOLUTION: The liquid crystal display device according to the present invention comprises a first substrate and a second substrate facing each other, a frame-shaped seal portion interposed between the two substrates, the first substrate, the second substrate and the seal. Liquid crystal sealed in a region surrounded by the portion, wherein the first substrate includes a plurality of first electrodes, and the second substrate includes a plurality of second electrodes in a facing region facing the first substrate. A first drive circuit connected to the plurality of first electrodes, and a second drive circuit connected to the plurality of second electrodes, in a protruding region protruding from an edge of the first substrate. It has.

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 and an electronic apparatus using the same.

[0002]

2. Description of the Related Art FIG. 8 is a plan view showing the structure of a conventional liquid crystal panel. As shown in FIG.
A first substrate 1 and a second substrate 2 which are arranged to face each other;
A sealing portion 3 interposed between the two substrates; a first substrate 1;
The liquid crystal is sealed in a region surrounded by the substrate 2 and the seal portion 3. Here, in a state where the first substrate 1 and the second substrate 2 are bonded to face each other, the first substrate 1 extends from an edge of the second substrate 2 (hereinafter, referred to as “extending region C”). The second substrate 2 has a region (hereinafter, referred to as “extended region D”) that extends from the edge of the first substrate 1. A plurality of data electrodes (data electrodes) 11 are formed inside the first substrate 1 (on the side of the liquid crystal 4), and each data electrode 11 reaches the overhang region C of the first substrate 1 and It is connected to the output terminal of the data electrode drive circuit 5 provided. On the other hand, a plurality of scan electrodes 21 are formed on the inner side (liquid crystal side) of the second substrate 2 so as to be orthogonal to each of the plurality of data electrodes 11.
The overhang area D of the substrate 2 is connected to the output terminals of the scan electrode drive circuit 6 arranged in the area. With such a configuration, each data electrode 11
, An output signal from the data electrode driving circuit 5 and an output signal from the scanning electrode driving circuit 6 to each scanning electrode 21 are supplied.

However, in the case of the above configuration, since each substrate has an area which extends over another substrate,
There is a problem that the space occupied by the liquid crystal panel becomes large.

In order to solve such a problem, a liquid crystal panel having a configuration shown in FIG. 9 has been proposed. In this liquid crystal panel, as shown in the figure, the second substrate 2 is formed larger than the first substrate 1, and a part of the second substrate 2 projects from the edge of the first substrate 1. ing. The data electrode 11 on the first substrate 1 and the second
The liquid crystal driving circuit 7 for supplying a predetermined voltage to the scanning electrodes 21 on the substrate 2 (that is, the data electrode driving circuit 5
And an IC having the function of the scanning electrode driving circuit 6 are also provided. Each output terminal of the liquid crystal driving circuit 7
The data electrodes 11 and the scan electrodes 21 are electrically connected to each other. With such a configuration,
As compared with the liquid crystal panel shown in FIG. 8, the size of the liquid crystal panel can be reduced by the size of the overhang area C. Each of the data electrodes 11 formed on the first substrate 1 is electrically connected to each output terminal of the liquid crystal drive circuit 7 on the second substrate 2 via a conductive material mixed in the sealing material 3. It has become.

[0005]

By the way, in recent years, as the size and resolution of the liquid crystal panel have been required, the number of electrodes formed on each substrate of the liquid crystal panel has increased. Reached. For this reason, a very large number of electrodes must be formed so as to reach one liquid crystal drive circuit without short-circuiting each other, and it has been extremely difficult to form the electrodes.

The present invention has been made in view of the circumstances described above, and even when there are many electrodes to be formed on each substrate, the space occupied by the liquid crystal panel is relatively large without increasing the space occupied by the liquid crystal panel. It is an object to provide a liquid crystal display device in which electrodes can be easily formed, and an electronic device using the same.

[0007]

According to the present invention, a first substrate and a second substrate opposed to each other, a seal portion interposed between the two substrates, and the first substrate, the second substrate and the seal portion are surrounded by the seal portion. A liquid crystal sealed in a region to be sealed, wherein the first substrate includes a plurality of first electrodes, and the second substrate includes a plurality of first electrodes in a region opposed to the first substrate. A first driving circuit connected to the plurality of first electrodes, and a second driving circuit connected to the plurality of second electrodes, in a protruding region that protrudes from an edge of the first substrate and includes two electrodes. And a liquid crystal display device comprising a circuit.

According to such a liquid crystal display device, since the drive circuit is provided only on one substrate, there is an advantage that the size of the liquid crystal display device can be reduced. Further, since the drive circuits connected to the first electrode and the second electrode are separately provided, compared with the case where the first electrode and the second electrode are connected to one drive circuit, The electrodes can be easily formed.

Here, among the first driving circuit and the second driving circuit, the one connected to the larger number of the plurality of first electrodes and the plurality of second electrodes is located at the center of the overhang region. It may be arranged near the part. In this case, a drive circuit connected to the larger one of the first electrode and the second electrode is provided near the center of the overhang area, and the other drive circuit is provided in the other area. It is supposed to be. Therefore, it is possible to preferentially form the larger number of the first electrode and the second electrode, and there is an advantage that the formation of the electrodes becomes easier.

The first drive circuit is disposed near a center of the overhang region, and the first electrode is electrically connected to the first drive circuit via a conductive material in the seal portion. It may be. In this case, there is an advantage that the first electrode can be preferentially formed so that the first electrode and the first drive circuit are reliably conducted.

The present invention is directed to any one of claims 1 to 3.
An electronic device comprising the liquid crystal display device according to the present invention as a display unit. According to such an electronic device, the size of the liquid crystal display device serving as the display unit can be reduced, so that the electronic device itself can be reduced in size. Further, the electrodes of the liquid crystal display device can be easily formed.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. Such an embodiment shows one aspect of the present invention, and does not limit the present invention, and can be arbitrarily changed within the scope of the present invention.

A: Configuration of Embodiment FIG. 1 is a perspective view showing a configuration of a liquid crystal panel 100 according to an embodiment of the present invention, and FIG.
0 is an exploded perspective view. In these drawings and the following drawings, the scale of each layer and each member is made different in order to make each layer and each member a recognizable size in the drawings.

As shown in FIGS. 1 and 2, the liquid crystal panel 100 includes a first substrate 1 and a second substrate 2 which are disposed to face each other, and a rectangular frame-shaped seal inserted between the two substrates. A liquid crystal 4 sealed in a region surrounded by the first substrate 1, the second substrate 2, and the seal portion 3.

The first substrate 1 and the second substrate 2 are plate-like members made of quartz, glass, plastic, or the like, and have a plurality of inner surfaces (on the side of the liquid crystal 4) for applying an electric field to the liquid crystal 4. Electrodes are formed. Specifically, a plurality of first data electrodes 11 are formed in a stripe shape on the inner surface of the first substrate 1. On the other hand, on the inner surface of the second substrate 2, a plurality of scanning electrodes 21 having portions orthogonal to the first data electrodes 11 and the first substrate 1 and the second substrate 2 in a state where the first substrate 2 and the second substrate 2 A plurality of second data electrodes 22 electrically connected to the data electrodes 11 are formed. Each of the first data electrode 11, the scan electrode 21, and the second data electrode 22 is, for example, an ITO (Indium Tin Oxid).
e) It is a transparent electrode formed as described above. In the present embodiment, the number of the first data electrodes 11 is larger than the number of the scanning electrodes 21. Further, each of the second data electrodes 22 corresponds to each of the first data electrodes 11, and is provided in the same number as the number of the first data electrodes 11.

Here, as shown in FIGS. 1 and 2, the second substrate 2 is larger (longer) in one direction than the first substrate 1. Therefore, in a state in which the two substrates are bonded to each other, a part of the second substrate 2 projects from one edge of the first substrate 1 (the edge indicated by A in FIG. 2).
Then, the overhanging area (hereinafter, “overhanging area 2a”)
In the figure, a data electrode driving circuit 5 for supplying a voltage corresponding to an image signal to the plurality of first data electrodes 11 is provided near the center in the X-axis direction. A scan electrode drive circuit 6 for supplying a voltage corresponding to an image signal to the plurality of scan electrodes 21 is provided near an end of the output region 2a (an end in the negative direction of the X axis in FIG. 2). It is arranged. Further, a terminal portion 8 connected to the input terminals of the data electrode drive circuit 5 and the scan electrode drive circuit 6 is formed on the overhang region 2a, and an image signal output from an external device is supplied to this terminal. It is supplied to each drive circuit via the section 8. The data electrode drive circuit 5 and the scan electrode drive circuit 6 correspond to one of a “first drive circuit” and a “second drive circuit” in claims, respectively.

The surface of the first substrate 1 on which the plurality of first data electrodes 11 are formed and the surface of the second substrate 2 on which the plurality of scanning electrodes 21 are formed are covered with an alignment film (not shown). . This alignment film is obtained by subjecting an organic thin film such as polyimide to a uniaxial alignment treatment, for example, a rubbing treatment. When no electric field is applied, the liquid crystal sealed between the two substrates is oriented according to the rubbing direction of the orientation film. On the other hand, the first substrate 1 and the second substrate 2
Polarizing plates (not shown) are attached to the outer surfaces of the substrates, respectively, and the polarizing axes of the respective polarizing plates are set in accordance with the orientation direction of the alignment film covering the inner surface of each substrate.

The seal portion 3 is made of a thermosetting epoxy resin or the like, and contains a spacer material for keeping the gap between the first substrate 1 and the second substrate 2 at a constant thickness. The seal portion 3 has an opening 3a for partially injecting the liquid crystal 4. After the liquid crystal 4 is injected into a region surrounded by the first substrate 1, the second substrate 2, and the seal portion 3, the opening 3a is closed by an adhesive.

The sealing portion 3 contains conductive particles in addition to the spacer material. The conductive particles
The elastic beads are formed by plating the surfaces of elastically deformable plastic beads. Although details will be described later, each of the first data electrodes 11 formed on the first substrate 1 and each of the second data electrodes 22 formed on the second substrate 2 are electrically connected by the conductive particles.

Next, a detailed configuration of each electrode formed on the first substrate 1 and the second substrate 2 will be described with reference to FIGS. Hereinafter, a region of the second substrate 2 other than the projecting region 2a, that is, a region facing the first substrate 1 is referred to as a “facing region 2b”.

FIG. 3 is a plan view showing the detailed structure of the surface of the first substrate 1 on the liquid crystal 4 side. As shown in the figure, a plurality of first data electrodes 11 are formed on the surface of the first substrate 1 on the liquid crystal 4 side. Each first data electrode 11 is formed in a direction parallel to the Y-axis near the edge A of the first substrate 1 and a display electrode 11a formed in a direction parallel to the Y-axis in the figure. It comprises a conduction terminal 11c and an extraction electrode 11b formed in a shape for connecting each display electrode 11a and the conduction terminal 11c. Here, the width of each conduction terminal 11c is smaller than the width of each display electrode 11a. In other words, as a whole,
The plurality of first data electrodes 11 have a shape that converges near the edge A of the first substrate 1 toward the center of the edge A.

FIG. 4 is a plan view showing the detailed structure of the surface of the second substrate 2 on the liquid crystal 4 side. As described above, the plurality of second data electrodes 22 and the plurality of scan electrodes 21 are formed on the surface of the second substrate 2 on the liquid crystal 4 side. Each second data electrode 22 is, as shown in FIG.
b, a terminal 22a for conduction formed in a portion near the overhang region 2a, a first input terminal 22c, and each terminal 2c for conduction.
2a and an extraction electrode 22b formed in a shape connecting the first input terminals 22c. Each second data electrode 22
The first input terminals 22c are arranged in the X-axis direction near the center of the overhang region 2a in the X-axis direction.

On the other hand, each of the plurality of scanning electrodes 21 formed on the second substrate 2 includes a display electrode 21a extending in a direction parallel to the X axis and an end portion of the overhang region 2a. A second input terminal 21c formed in the vicinity (near the left end in the example shown in FIG. 4) and an extraction electrode 21b formed in a shape connecting one end of each display electrode 21a and each second input terminal 21c. Consists of That is, each extraction electrode 21b is
From one end of the display electrode 21a located in the negative direction of the X axis,
It is formed in a shape extending along one side of the second substrate 2 and reaching one end of the second input terminal 21c. In addition, each scanning electrode 2
The one second input terminal 21c is arranged in the X-axis direction near the end of the overhang region 2a.

Next, FIG. 5 shows a structure in which the first substrate 1 and the second substrate 2 are bonded together with a sealing portion 3 interposed therebetween such that electrodes formed on the respective surfaces face each other. FIG. 3 is a plan view illustrating a detailed configuration when viewed from a first substrate side. As can be seen from FIG. 5 and FIGS. 3 and 4 described above,
In a state where both substrates are bonded to each other, a conduction terminal 11c of each first data electrode 11 formed on the first substrate 1,
The second data electrodes 22 formed on the second substrate 2 face the conduction terminals 22 a with the sealing material 3 interposed therebetween. The conduction terminals 11c and 22a are electrically conducted by the conductive particles mixed in the sealing material 3. As a result, each first data electrode 11 and second data electrode 22 are electrically connected to form one data electrode, and a plurality of data electrodes occupying most of the first substrate 1 as a whole are The shape converges and reaches the vicinity of the center of the overhang region 2a of the second substrate 2.

Here, FIG. 6 shows each of the conduction terminals 11c formed on the first substrate 1 and each of the conduction terminals 22a formed on the second substrate 2, and the sealing portion sandwiched therebetween. FIG. 3 is an enlarged cross-sectional view illustrating a portion near 3 (including conductive particles 3b). As shown in FIG.
When the sealing portion 3 is cured while applying a force to narrow the gap in a state where the conduction terminal 11c and the corresponding conduction terminal 22a are opposed to each other when the substrate 2 is bonded, the sealing portion 3 The conductive particles 3b in the first substrate 1
And the second substrate 2. As a result, the conductive particles 3b located between each conduction terminal 11c and the conduction terminal 22a facing the conduction terminal 11c are connected to the conduction terminal 11c.
And the conduction terminal 22a. On the other hand, since the conductive particles 3b located in a region other than the region where the conduction terminal 11c and the conduction terminal 22a face each other do not participate in the conduction of each part at all, each conductive terminal 11c and the conduction terminal facing the conduction terminal 11c are opposed to each other. Only the connection with the terminal 22a is conducted.

Referring again to FIG. 5, the first input terminal 22c which is one end of each data electrode is connected to the overhang region 2a of the second substrate 2.
Is connected to each output terminal of the data electrode driving circuit 5 arranged near the center of the data electrode driving circuit. Each output terminal of the data electrode drive circuit 5 and each of the first input terminals 22c are, for example, ACF
(Anisotropic Conductive Film) and the like.

On the other hand, the second input terminal 21c of each scanning electrode 21 formed on the second substrate 2 is connected to the scanning electrode driving circuit 6 disposed near the end of the overhang area 2a of the second substrate 2. Connected to each output terminal. Each of these parts is also the same as the ACF described above.
Connected via

In a state where the first substrate 1 and the second substrate 2 are bonded to each other, the display electrodes 11 of the first data electrodes 11
a is orthogonal to the display electrode 21a of each scanning electrode 21, and a pixel is formed by a portion where the display electrodes 11a and 21a intersect and the liquid crystal 4 interposed between the portions. That is, an image is displayed in a region where the display electrodes 11a and 21a intersect. Hereinafter, this area is referred to as an image display area. In the present embodiment,
Each of the first data electrode 11 and the scanning electrode 21 is formed so as to reach a region other than the above-described image display region (that is, a peripheral portion of the image display region or the like). For example, the electrode is formed in a portion surrounded by a broken line in FIGS. The electrodes formed in these areas are
Although it does not play any role in displaying an image, it plays a role in making the thickness of the gap between the two substrates substantially the same in the image display area and the other areas. In other words, if the first data electrode 11 is located only in the image display area of the area surrounded by the seal portion 3 (the area where the liquid crystal 4 is sealed).
When the scanning electrode 21 is formed and no electrode is formed in the other area, the thickness of the gap between the two substrates in the area other than the image display area is larger than the thickness of the gap between the two substrates in the image display area. However, the thickness is increased by the thickness of the electrode. That is, the thickness of the liquid crystal layer in a region other than the image display region is different from the thickness of the liquid crystal layer in the image display region. As a result, there is a problem that the color of each region is different. On the other hand, in the present embodiment, such an inconvenience does not occur because the electrodes are formed in a portion other than the image display area. Hereinafter, the electrodes formed in the area other than the image display area in this manner are referred to as “dummy electrodes”. In the present embodiment, a dummy electrode (indicated by B in FIG. 4) is also provided in a region on the second substrate 2 located between the extraction electrode 11b of the first data electrode 11 and the extraction electrode 21b of the scanning electrode 21. Part) is formed.

The above is the liquid crystal panel 100 according to the present embodiment.
It is a structure of.

As described above, according to this embodiment, since both the data electrode drive circuit 5 and the scan electrode drive circuit 6 are provided on the overhang region 2a of the second substrate 2, 8 has an advantage that the size of the liquid crystal panel can be reduced as compared with the conventional technique shown in FIG. Furthermore, since the driving circuit connected to the data electrode and the driving circuit connected to the scanning electrode are separately provided, the formation of the electrodes is smaller than in the case where each electrode is formed to reach one driving circuit. It can be done easily.

In this embodiment, the data electrodes are converged near the center of the overhang region 2a, and the data electrode driving circuit 5 is also disposed near the center of the overhang region 2a.
Output terminal. Here, when one electrode is converged to the vicinity of the center of the overhang region 2a,
The following advantages are obtained.

First, suppose that each of the data electrodes is connected to the overhang region 2.
a, the angle between the direction in which the extraction electrode 22b of the second data electrode 22 extends and the negative direction of the X axis (the angle α in FIG. 4). 5) is smaller than the case shown in FIG. 5 described above, and the width of the extraction electrode 22b of the second data electrode 22 is reduced as shown in FIG.
Must be made narrower than the case shown in FIG. When the width of the electrode is reduced, there is a problem that disconnection of each electrode or short-circuit between adjacent electrodes is apt to occur. On the other hand, in the present embodiment, since the data electrode is made to converge near the center of the overhang region 2a, the angle α does not become so small. Therefore, the width of the extraction electrode 22b of the second data electrode 22 is not as narrow as when each data electrode is converged to the end of the overhang region 2a, so that the above-described problem can be avoided.

In this embodiment, one of the data electrodes and the scanning electrodes 21 having a larger number of wirings is set to the overhang area 2.
When the light is converged to the vicinity of the center of a, the following advantages are obtained. That is, if the smaller number of electrodes are formed so as to converge near the center of the overhang region 2a,
It is necessary to form a larger number of electrodes so as to avoid the region where the electrodes are formed. On the other hand, when the electrode with the larger number is converged near the center, the electrode is preferentially formed on the substrate, and the electrode with the smaller number is formed so as to avoid the region where the electrode is formed. Therefore, restrictions on electrode formation can be reduced as compared with the above-described case.

In this embodiment, the overhang area 2
The data electrode converged at the center of a is divided into the first substrate 1 and the second substrate 2 and formed to be conductive by the conductive particles in the seal portion 3. As described above, when the electrode converged at the center of the overhang region is made conductive between the substrates, the following advantages are obtained. That is,
As described above, when the electrode with the larger number is made to converge near the center of the overhang region 2a, the electrode can be formed preferentially as compared with the electrode with the smaller number. Therefore, the conduction terminal 11 of the first data electrode 11
c and the shape of the conduction terminal 22a of the second data electrode 22 (the width and interval of each conduction terminal 11c and 22a, etc.)
The shape can be made necessary and sufficient to ensure conduction through the conductive material.

In the above embodiment, a liquid crystal panel having a larger number of data electrodes than the number of scanning electrodes has been described as an example. However, a liquid crystal panel having a larger number of scanning electrodes than the number of data electrodes may be used. The present invention can be applied. In this case, a large number of scan electrodes are converged at the center of the overhang area of the second substrate, and the end of each scan electrode is connected to the output terminal of the scan line drive circuit arranged near the center of the area. What is necessary is just to connect.

B: Application Example Next, a case where the liquid crystal panel 100 according to each of the above embodiments is applied as a display device of various electronic devices will be described. In this case, as illustrated in FIG. 7, the electronic device 300 includes a display information output source 301, a display information processing circuit 302,
It comprises a power supply circuit 303, a timing generator 304 and the above-described liquid crystal panel 100.

The display information output source 301 is a ROM or RAM
And the like, a storage unit such as various disks, a tuning circuit for synchronizing and outputting a digital image signal, and the like, and displaying an image signal in a predetermined format based on various clock signals output by the timing generator 304. The information is output to the display information processing circuit 302. The display information processing circuit 302 includes various known circuits such as an amplification / inversion circuit, a rotation circuit, a gamma correction circuit, and a clamp circuit. The display information processing circuit 302 executes processing of the supplied display information, and outputs the image signal together with the clock signal. It is supplied to the drive circuit of the liquid crystal panel 100. The power supply circuit 303 supplies a predetermined power to each component.

Specific examples of the above electronic equipment include, for example,
Portable personal computers, mobile phones, viewfinder or monitor direct-view video tape recorders, car navigation devices, pagers, electronic notebooks, calculators, word processors, workstations, videophones, POS terminals, various devices with touch panels, etc. Conceivable.

[0039]

As described above, according to the present invention,
Since both the first driving circuit connected to the first electrode and the second driving circuit connected to the second electrode are formed on one substrate, a conventional driving circuit is provided on each substrate. The space occupied by the liquid crystal display device can be reduced as compared with the technique of (1). Furthermore, since each of the electrodes formed on both substrates is connected to a separate drive circuit, the electrodes formed on both substrates may be formed so as to reach one drive circuit. In comparison, the formation of the electrodes is facilitated, and the occurrence of problems such as short-circuiting and disconnection of the electrodes can be suppressed.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a configuration of a liquid crystal panel according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which the liquid crystal panel in the embodiment is disassembled.

FIG. 3 is a plan view showing a configuration on a first substrate of the liquid crystal panel in the same embodiment.

FIG. 4 is a plan view showing a configuration on a second substrate of the liquid crystal panel in the same embodiment.

FIG. 5 is a plan view showing a detailed configuration of each electrode of the liquid crystal panel in the same embodiment.

FIG. 6 is a cross-sectional view for explaining a state of conduction of each conduction terminal in the embodiment.

FIG. 7 is a block diagram illustrating a configuration of an electronic device according to an embodiment of the invention.

FIG. 8 is a plan view showing a configuration of a conventional liquid crystal panel.

FIG. 9 is a plan view showing a configuration of a conventional liquid crystal panel.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... 1st board | substrate 2 ... 2nd board | substrate 2a ... Overhang area | region 2b ... Opposite area 3 ... Seal part 3a ... Opening part 3b ... Conductive particle 4 ... Liquid crystal 5 ... Data electrode drive circuit (1st drive circuit, 2nd drive circuit) 6 ... Scan electrode drive circuit (1st drive circuit, 2nd drive circuit) 11 ... 1st data electrode (1st electrode) 21 ... Scan electrode (2nd electrode) 22) Second data electrode (first electrode) 11a, 21a Display electrode 11b, 21b, 22b Leader electrode 11c, 22a Conducting terminal 21c Second input terminal 22c First Input terminal

Claims (4)

[Claims] A first substrate and a second substrate opposed to each other, a seal portion interposed between the first and second substrates,
A liquid crystal display device comprising: a second substrate and liquid crystal sealed in a region surrounded by a seal portion, wherein the first substrate includes a plurality of first electrodes, and wherein the second substrate includes the first substrate. A first driving circuit connected to the plurality of first electrodes; a first driving circuit connected to the plurality of first electrodes; A liquid crystal display device comprising: a second drive circuit connected to two electrodes. 2. The first drive circuit and the second drive circuit, which is connected to a larger one of the plurality of first electrodes and the plurality of second electrodes, is a central portion of the overhang region. The liquid crystal display device according to claim 1, wherein the liquid crystal display device is arranged near. 3. The first drive circuit is disposed near a central portion of the overhang region, and the first electrode is electrically connected to the first drive circuit via a conductive material in the seal portion. A liquid crystal display device characterized by the above-mentioned. 4. An electronic apparatus comprising the liquid crystal display device according to claim 1 as a display unit.