JPH11101984A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high performance and high reliability liquid crystal display device wherein electrodes are arranged so as not to be shorted between them in a liquid crystal display device for a high resolution picture. SOLUTION: A liquid crystal display 21 is constituted by the following (1)-(3):(1) Transparent electrodes 2 on a scanning side substrate 4 are extended in a sealer part 7 and brought into conduction, through a conductive spacer 6, to an electrode pattern for external connections 8a formed outside of the sealer part 7 on a signal side substrate 5, and the line width of the electrode pattern 8a for external connections are made narrower than that of the transparent electrodes 2. (2) Dummy electrodes 10a are formed in an arrangement area for the sealer 7 on the scanning side substrate 4, and transparent electrodes 3 on the signal side substrate 5 are extended nearly up to the dummy electrodes 10a, and the line width of these dummy electrodes 10a are made narrower than that of the transparent electrodes 3. (3) Dummy electrodes 10b are formed on the arrangement area for the sealer part 7 on the signal side substrate 5, and the transparent electrodes 2 on the scanning side substrate 4 are extended nearly up to the dummy electrodes 10a, and the line width of these dummy electrodes 10b is made narrower than that of the transparent electrodes 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an improvement in a liquid crystal display device.

[0002]

4 to 6 show a conventional liquid crystal display device 1. FIG. 4 is a plan view thereof, FIG. 5 is a sectional view taken along the line AA of FIG. 4, and FIG. FIG. 3 is a cross-sectional view taken along a line B-B (see Japanese Patent Application Laid-Open No. 6-51332).

According to the liquid crystal display device 1, a scanning-side substrate 4 and a signal-side substrate 5 made of glass having transparent electrodes 2 and 3 formed on the inner surface thereof are opposed to each other, and the transparent electrodes 2 and 3 cross each other. The region is a display region, and an alignment film is provided on each of the transparent electrodes 2 and 3. Further, a sealant of a thermosetting resin containing the conductive spacer 6 is disposed around the display area, and the substrates 4 and 5 are bonded together with the sealant.
The sealing sealer 7 is formed. Further, an external connection electrode pattern 8 for a scanning electrode is formed on the signal side substrate 5, and the transparent electrodes 2 arranged on the scanning side substrate 4 are externally connected through a conductive spacer 6 inside the sealing sealer 7. A signal input to the external connection electrode pattern 8 is transmitted to the transparent electrode 2 through the conductive spacer 6. The liquid crystal 9 is sealed in the sealing sealer 7 between the substrates 4 and 5, and the dummy sealing electrodes 7 are disposed on the scanning side substrate 4 and the signal side substrate 5 at the portions where the sealing sealer 7 is provided. 10 and 11 are formed, whereby the gap between both substrates (the thickness of the liquid crystal 9) is kept uniform. Further, a large amount of non-conductive spacers 12 are dispersed inside the liquid crystal 9, which also makes the liquid crystal 9 have a uniform thickness.

[0004]

However, in the liquid crystal display device 1 having the above-described structure, when the scanning side substrate 4 and the signal side substrate 5 are bonded to each other, poor bonding accuracy or expansion and contraction of the substrates 4 and 5 occur. As a result, the two substrates 4 and 5 are displaced from each other, so that a precise and accurate facing position between the external connection electrode pattern 8 and the transparent electrode 2 and between the transparent electrode 3 and the dummy electrode 10. As a result, the external connection electrode pattern 8 is disposed between the adjacent transparent electrodes 2 and the dummy electrode 10 is present between the adjacent transparent electrodes 3. There is a problem that adjacent transparent electrodes 2 and adjacent transparent electrodes 3 are short-circuited via the conductive spacers 6 inside. Such a problem is remarkably recognized in a liquid crystal display device having a high definition image having an electrode pitch of 80 μm or less.

Accordingly, the present invention has been devised in view of the above circumstances, and a purpose thereof is to provide a high-performance and high-reliability liquid crystal display device in which a short circuit between electrodes is prevented from occurring in a liquid crystal display device of a high definition image. Is to provide.

[0006]

A liquid crystal display device according to the present invention comprises a transparent substrate in which transparent electrode patterns arranged in one direction and an alignment film are sequentially laminated, and a transparent electrode pattern arranged in the other direction. And the other transparent substrate, on which an alignment film is sequentially laminated, are arranged at a predetermined interval to face each other, and the two transparent electrode patterns intersect to form a display area. A conductive area is provided around the display area between the two transparent substrates. A sealing agent including a sealing agent is provided around the sealing substrate, and the transparent electrode pattern on the other transparent substrate is extended to the sealing sealer to seal on one transparent substrate; An electrode pattern for external connection formed outside the sealer portion is made conductive by passing through a conductive spacer, a liquid crystal material is sealed in the sealing sealer portion, and both transparent substrates are bonded together, and The line width of the external connection electrode pattern The transparent electrode pattern on the substrate - is characterized in that narrower than the line width of the emission.

According to another liquid crystal display device of the present invention, there is provided a transparent substrate in which a transparent electrode pattern and an alignment film arranged in one direction are sequentially laminated, and a transparent electrode pattern and an alignment film arranged in the other direction. Are arranged facing each other at a predetermined interval, and the two transparent electrode patterns intersect to form a display area, and a conductive spacer is provided around the display area between the two transparent substrates. A sealing agent is provided around the periphery of the sealing agent, and a dummy electrode is formed in the sealing sealer-provided region on the other transparent substrate, and a transparent electrode pattern on one transparent substrate is formed. Either extend to the vicinity of the dummy electrode, or form a dummy electrode in the area where the sealing sealer is provided on one of the transparent substrates, and extend the transparent electrode pattern on the other transparent substrate to the vicinity of the dummy electrode. Extend the liquid crystal material inside the sealing sealer. And the two transparent substrates are bonded together, and the line width of the dummy electrode is set to the line width of the transparent electrode pattern on one transparent substrate or the line width of the transparent electrode pattern on the other transparent substrate. It is characterized by being narrower than the line width.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A liquid crystal display device 21 of the present invention is shown in FIG.
This will be described with reference to FIG. FIG. 1 is a plan view, and FIG.
3 is a sectional view taken along the line AA of FIG. 1, and FIG. 3 is a sectional view taken along the line BB of FIG. The same parts as those of the conventional liquid crystal display device 1 are denoted by the same reference numerals.

In the liquid crystal display device 21 of the present invention, the glass scanning side substrate 4 as the other transparent substrate and the glass signal side substrate 5 as the one transparent substrate are arranged to face each other. By forming the transparent electrode 3 as a transparent electrode pattern arranged in one direction on the signal side substrate 5 and forming the transparent electrode 2 as a transparent electrode pattern arranged in the other direction on the scanning side substrate 4, The two transparent electrodes 2 and 3 intersect to form a rectangular display area, and the transparent electrode 2 and the transparent electrode 3 are coated with an alignment film of a polyimide resin.

Further, the scanning side substrate 4 and the signal side substrate 5 are sealed with a sealant made of a thermosetting resin such as an epoxy-based, acrylic-based, or silicone-based resin containing a conductive spacer 6. It is fixed via the stop sealer 7. That is, the scanning-side substrate 4 and the signal-side substrate 5 are adhered to each other via the sealing sealer 7, and are further aligned to provide a space surrounded by the sealing sealer 7. To cure them. Moreover, in the display area between the scanning side substrate 4 and the signal side substrate 5, a large number of non-conductive spacers made of resin spheres are dispersed, so that the distance between the two substrates is kept constant, and the liquid crystal 9 is contained therein. It is enclosed.

The liquid crystal display device 21 of the present invention is characterized by the following constitutional requirements (1), (2) or (3). (1) The transparent electrode 2 on the scanning-side substrate 4 extends to the sealing sealer portion 7, and the external connection electrode pattern 8 a formed outside the sealing sealer portion 7 on the signal-side substrate 5 is electrically conductive. And the line width of the external connection electrode pattern 8a is made smaller than the line width of the transparent electrode 2 on the scanning side substrate 4.

(2) A dummy electrode 10a is formed in the area where the sealing sealer 7 is provided on the scanning substrate 4, and the transparent electrode 3 on the signal substrate 5 is extended to the vicinity of the dummy electrode 10a. The line width of the dummy electrode 10a is smaller than the line width of the transparent electrode 3 on the signal-side substrate 5.

(3) A dummy electrode 10b is formed on the signal-side substrate 5 in a region where the sealing sealer 7 is provided, and the transparent electrode 2 on the scanning-side substrate 4 is extended to the vicinity of the dummy electrode 10b. The line width of the dummy electrode 10b is smaller than the line width of the transparent electrode 2 on the scanning side substrate 4.

The transparent electrodes 2 and 3 having a thickness of 500 to 3000.degree. Are formed on the scanning side substrate 4 and the signal side substrate 5 by sputtering or vapor deposition. , Dummy electrode 10
a, a dummy electrode 10b is also provided at the same time.

Thus, in the liquid crystal display device 21 of the present invention, the line width of one electrode is narrower than the line width of the other electrode between the opposing electrodes as described in (1) to (3) above. That is, since the line width of the external connection electrode pattern 8a, the line width of the dummy electrode 10a, and the line width of the dummy electrode 10b are smaller than the line widths of the transparent electrodes 2 and 3, the scanning side substrate 4 Even if a displacement occurs between the substrates when the substrate and the signal side substrate 5 are bonded to each other, short-circuiting does not occur between the adjacent transparent electrodes 2 and between the adjacent transparent electrodes 3 via the conductive spacer 6. Or the degree of short-circuiting has been significantly reduced.

As an example, regarding (2), as shown in FIG. 2, the line width of the dummy electrode 10a is d and the line width of the transparent electrode 3 on the signal side substrate 5 is D (D> d).
Assuming that the amount of deviation of the center between the two patterns of the transparent electrodes 2 and 3 is V, if V <p − {(D + d) / 2} is satisfied, adjacent electrode patterns will not be short-circuited. Note that this relational expression also applies to (1) and (3).

For example, the line width of the transparent electrode 3 is 60 μm,
When the dummy electrode 10a having the same pitch and the same line width is formed with respect to a pattern in which the pitch p of the transparent electrodes 3 is 70 μm, the center of the transparent electrode 3 and the dummy electrode 10a is 10 μm.
If the gap is shifted as described above, the dummy electrode 10a becomes adjacent to the transparent electrode 3
, And a short circuit occurs between the electrode patterns via the conductive spacer 6. Therefore, if the dummy electrodes 10a have a line width of 40 μm at the same pitch and the center of the pattern is shifted by less than 20 μm, no short circuit between the patterns occurs. However, if d becomes too small with respect to D, the gap between the substrates in the seal portion becomes narrower than the gap between the substrates in the display surface.
/ D may be in the range of 0.5 to 0.8.

It should be noted that the present invention is not limited to the above embodiment, and various changes and improvements may be made without departing from the scope of the present invention. For example, in this embodiment, a description has been given of a monochrome liquid crystal display device. However, a color liquid crystal display device provided with a color filter has the same effect.

[0019]

As described above, according to the liquid crystal display device of the present invention, the line width of the external connection electrode pattern and the line width of the dummy electrode are made smaller than the line width of the transparent electrode pattern.
Even if a displacement occurs between the substrates when a pair of transparent substrates are bonded, the short circuit between adjacent transparent electrodes does not occur, or the degree of short circuit is significantly reduced,
As a result, the quality and reliability of a liquid crystal display device having a high-definition image with an electrode pitch of 80 μm or less could be significantly improved.

Further, in the present invention, since the short circuit between the electrodes which occurs during the production is remarkably reduced, the production yield is improved, and the production cost can be reduced. As a result, a low cost liquid crystal display device is provided. did it.

[Brief description of the drawings]

FIG. 1 is a plan view of a liquid crystal display device of the present invention.

FIG. 2 is a cross-sectional view of the liquid crystal display device of the present invention shown in FIG. 1, taken along the line AA.

3 is a cross-sectional view of the liquid crystal display device of the present invention shown in FIG. 1 taken along the line BB.

FIG. 4 is a plan view of a conventional liquid crystal display device.

5 is a cross-sectional view of the conventional liquid crystal display device shown in FIG. 4, taken along the line AA.

6 is a cross-sectional view of the conventional liquid crystal display device shown in FIG. 4, taken along the line BB.

[Explanation of symbols]

 1, 21 Liquid crystal display device 2, 3 Transparent electrode 4 Scanning substrate 5 Signal side substrate 6 Conductive spacer 7 Sealing sealer 8, 8a External connection electrode pattern 9 Liquid crystal 10, 10a, 10b dummy electrode

Claims (2)

[Claims] 1. A transparent substrate in which a transparent electrode pattern and an orientation film arranged in one direction are sequentially laminated, and another transparent substrate in which a transparent electrode pattern and an orientation film arranged in another direction are sequentially laminated. A substrate and a substrate are arranged at a predetermined interval to face each other, a transparent region is formed by crossing both transparent electrode patterns, and a sealant containing a conductive spacer is provided around the display region between the transparent substrates. An external connection electrode in which a sealing sealer is provided, a transparent electrode pattern on the other transparent substrate extends to the sealing sealer, and is formed outside the sealing sealer on the one transparent substrate; Make the pattern conductive through conductive spacers,
Further, a liquid crystal display device in which a liquid crystal material is sealed in a sealing sealer portion and both transparent substrates are bonded to each other, wherein the line width of the external connection electrode pattern is set to the width of the transparent electrode pattern on the other transparent substrate. A liquid crystal display device characterized by being narrower than the line width. 2. A transparent substrate on which a transparent electrode pattern and an alignment film arranged in one direction are sequentially laminated, and another transparent substrate on which a transparent electrode pattern and an alignment film arranged in the other direction are sequentially laminated. A substrate and a substrate are arranged at a predetermined interval to face each other, a transparent region is formed by crossing both transparent electrode patterns, and a sealant containing a conductive spacer is provided around the display region between the transparent substrates. A sealing sealer portion is provided, and a dummy electrode is formed in a region where the sealing sealer portion is provided on the other transparent substrate, and the transparent electrode pattern on one transparent substrate extends to the vicinity of the dummy electrode. Alternatively, a dummy electrode is formed in the sealing sealer arrangement area on one transparent substrate, and the transparent electrode pattern on the other transparent substrate is extended to the vicinity of the dummy electrode. Liquid crystal material and paste both transparent substrates The combined liquid crystal display device, wherein the line width of the dummy electrode is smaller than the line width of the transparent electrode pattern on one transparent substrate or the line width of the transparent electrode pattern on the other transparent substrate. Liquid crystal display device.