JPH078838U - Panel assembly for liquid crystal display device - Google Patents

Abstract

(57) [Summary] [Object] To provide a panel assembly for a liquid crystal display capable of improving the display quality while maintaining good flatness of a panel bonded via a sealing material. [Configuration] On one panel 1, a black mask 3,
A lead-out line 3a, a first ground line 18, an insulating film 4, a scanning electrode 5, a second ground line 19 electrically connected to this through a lead 5a, and a metal film 6 disposed on the lead 5a are formed. On the panel 2 of the signal electrode 1
0, dummy electrode pattern 13, lead 1 for signal electrode 10
On the third earth line 20, the lead 10a, and the end portion 13a of the dummy electrode pattern 13 which are electrically connected via 0a.
The metal film 11 to be arranged on the above is formed, the panels 1 and 2 are adhered by the sealing material 17, the gap material 21 is mixed in the sealing material 17, and the drawing line 3a and the end portion 13 are formed.
a are opposed to each other with the sealing material 17 interposed therebetween, and the end portion 13a
The metal film 14 formed on the upper part is cut off at a portion facing the extraction line 3a with the sealing material 17 interposed therebetween.
It has been a.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a panel assembly for obtaining a liquid crystal display device.

[0002]

[Prior art]

 The liquid crystal display element is formed by polymerizing and adhering a pair of transparent substrates on which transparent display electrodes are formed via a frame-shaped sealing material, and enclosing the liquid crystal in the space surrounded by the inside of the sealing material and each substrate. .

In a simple matrix type liquid crystal display element, a display electrode formed on one substrate and a display electrode formed on the other substrate are arranged so as to be orthogonal to each other, and one electrode thereof is arranged. Is used as a scanning electrode, and the other electrode is used as a signal electrode.

Each substrate in such a liquid crystal display device is generally manufactured by a so-called multiple-pickup method in which a plurality of substrates are collectively formed from a large panel. FIG. 7A shows a part of the large-sized panel 1 for collecting one substrate, and FIG. 7B shows a part of the large-sized panel 2 for collecting the other substrate. An area S indicated by a virtual line is a display area for displaying an image.

A black mask 3 made of a metal film of Cr or the like is formed on the display area S of the large-sized panel 1, and the black mask 3 is a transparent insulating film made of SiN or the like as shown in FIG. 4, a scan electrode 5 made of a transparent conductive film such as ITO is arranged as an array on the insulating film 4 as a first display electrode.

One end of the scanning electrode 5 extends outside the display area S as a lead 5a, and a metal film 6 made of Cr or the like is formed on the lead 5a as shown in FIG. The scanning electrode 5 disposed inside S is covered with an alignment film 7 made of polyimide or the like as shown in FIG.

A signal electrode 10 made of a transparent conductive film such as ITO is arrayed and formed as a second display electrode on the display region S of the other large-sized panel 2, and one end of the signal electrode 10 is a lead. As shown in FIG. 11, a metal film 11 made of Cr or the like is formed on the lead 10a outside the display area S, and the signal electrode 10 arranged inside the display area S As shown in FIG. 12, it is covered with an alignment film 12 made of polyimide or the like.

Further, a dummy electrode pattern 13 made of ITO or the like is formed outside the display region S on the large-sized panel 2 in order to flatten the alignment film 12. The area of both ends 13a of the dummy electrode pattern 13 is expanded, and a metal film 14 made of Cr or the like is formed on the expanded end 13a as shown in FIG.

The surfaces of the alignment films 7 and 12 provided on the electrodes 5 and 10 are subjected to an alignment treatment by rubbing or the like, and static electricity is generated during this alignment treatment, and the static electricity causes adjacent scan electrodes to be adjacent to each other. 5 and between the scanning electrode 5 and the black mask 3, or between the adjacent signal electrodes 10, there is a possibility that electrostatic breakdown may occur in the electrodes 5, 10, the black mask 3, or the alignment films 7, 12. .

Therefore, on one of the large-sized panels 1, outside the display area S, there are provided a first ground line 18 electrically connected to the black mask 3 and a second earth line 19 electrically connected to each scanning electrode 5. Has been formed.

The first ground line 18 is formed integrally with the black mask 3 by patterning, and is electrically connected to the black mask 3 via a lead line 3 a extending from the black mask 3. The first ground line 18 and the lead-out line 3a are covered with the insulating film 4.

The second ground line 19 is formed integrally with the scan electrode 5 by patterning, and is electrically connected to the scan electrode 5 via a lead 5 a extending from the scan electrode 5. Then, as shown in FIG. 10, the second ground line 19 overlaps the first ground line 18 with the insulating film 4 interposed therebetween, and a part of the second ground line 19 penetrates the insulating film 4 to penetrate the second ground line 18. It is in contact with 19.

On the other large panel 2, a third ground line 20 is formed outside the display area S so as to communicate with the signal electrode 10. The third ground line 20 is formed integrally with the signal electrode 10 by patterning, and is electrically connected to the signal electrode 10 through a lead 10a extending from the signal electrode 10. A metal film 11 integral with the metal film 11 formed on the lead 10a of the signal electrode 10 is superposed on the third ground line 20.

At the time of the alignment process for the alignment films 7 and 12, the earth lines 18, 19 and 20 are grounded, and the alignment process is performed in this state. According to such a means, even if static electricity is generated during the orientation process, the same potential is maintained between the adjacent scanning electrodes 5, between the scanning electrodes 5 and the black mask 3, or between the adjacent signal electrodes 10. Therefore, the electrodes 5 and 10, the black mask 3, or the alignment films 7 and 12 are prevented from being electrostatically damaged.

After the alignment treatment on the alignment films 7 and 12 is completed, one large panel 1 and the other large panel 2 are polymerized so that their respective display areas S face each other as shown in FIG. The panels 1 and 2 are adhered to each other by a frame-shaped sealing material 17 provided so as to surround the display area S. Inside the sealing material 17, a large number of granular gap materials 21 for maintaining a constant gap between the panels 1 and 2 are mixed.

After the large-sized panels 1 and 2 are adhered to each other via the sealing material 17, the large-sized panels 1 and 2 are cut along the scribe line L outside the sealing material 17 to be separated into individual liquid crystal cells, The liquid crystal is sealed in the space inside the sealing material 17 in the liquid crystal cell to complete the liquid crystal display element.

[0017]

[Problems to be solved by the device]

 By the way, an A portion shown in FIG. 14 is a portion where the lead 5a of the scanning electrode 5 and the sealing material 17 are superposed, a portion B is an portion where the lead 10a of the signal electrode 10 and the sealing material 17 are superposed, and a C portion is a black mask. 15 (A), (3) is a portion where the lead-out line 3a of No. 3, the sealing material 17, and the end portion 13a of the dummy electrode pattern 13 are overlapped, and the cross-sectional structure of these A portion, B portion, and C portion is shown in FIG. As in B) and (C).

In the section A, three layers of the insulating film 4, the lead 5a of the scanning electrode 5 and the metal film 6 overlapping the lead 5a are arranged between the panels 1 and 2, and in the section B, The insulating film 4, the lead 10a of the signal electrode 10 and the metal film 11 overlapping the lead 10a are arranged between the panels 1 and 2 in three layers.

On the other hand, in the C portion, the lead-out line 3a of the black mask 3, the insulating film 4 covering the lead-out line 3a, the end portion 13a of the dummy electrode pattern 13 and the end portion thereof are provided between the panels 1 and 2. Four layers with a metal film 14 that overlaps the portion 13a are arranged.

As described above, since the three layers of films are arranged between the panels 1 and 2 in the parts A and B, the substantial facing distance H1 between the panels 1 and 2 in the part A, The substantially opposing distance between the panels 1 and 2 in the section B is substantially the same as H2.

On the other hand, in the C portion, since four layers of films are arranged between the panels 1 and 2, the substantial opposing distance between the panels 1 and 2 in the C portion is H 3 as described above. It is smaller than H1 and H2.

The gap materials 21 mixed in the seal material 17 have substantially the same diameter, and the gap materials 21 are respectively interposed in the parts A, B, and C. However, in the C portion, the width of the facing interval between the panels 1 and 2 is narrow. Therefore, when the gap material 21 is interposed in the C portion, the gap material 21 locally causes the gap between the panels 1 and 2 of the C portion. A strong pressure is applied in the up and down direction, and as a result, the flatness of the panels 1 and 2 is impaired, which causes deterioration of display quality.

The present invention has been made in view of such a point, and an object thereof is to improve the display quality by keeping the flatness of the panel adhered via the sealing material good. Another object of the present invention is to provide a panel assembly for a liquid crystal display capable of achieving the above.

[0024]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention comprises a pair of transparent panels for assembling a liquid crystal display element, and a black mask is provided on the inside of the display area for displaying an image on one of the panels. A first ground line is formed on the outside of the display area on the black mask through a lead line extending from the black mask, and the black mask, the lead line, and the first ground line are formed of an insulating film. On the insulating film, a first display electrode is formed inside the display area, and a second ground line is formed outside the display area and electrically connected to the first display electrode through a lead. The second ground line is electrically connected to the first ground line, a metal film is formed on the lead of the first display electrode, and the metal film is formed inside the display area. The electrodes are covered with an alignment film, and the second display electrode is provided inside the display region, the dummy electrode pattern is provided outside the display region, and the lead is provided to the second display electrode above the other panel. A third ground line that is electrically connected to each other is formed, and a metal film is formed on the lead of the second display electrode and on the end of the dummy electrode pattern, respectively, inside the display region. The second display electrode to be arranged is covered with a directing film, the one panel and the other panel are polymerized so that their display areas face each other, and both panels are displayed as described above. It is adhered by a frame-shaped sealing material that surrounds the area, and this sealing material contains a gap material for maintaining a constant gap between the two panels, and pulls out the black mask formed on one of the panels. Line and In the panel assembly for a liquid crystal display device, the end of the dummy electrode pattern formed on the other panel and the end of the dummy electrode pattern face each other with the sealing material in between, and are formed on the end of the dummy electrode pattern. A part of the metal film formed, that is, a part facing the extraction line of the black mask with the sealing material sandwiched is cut off.

[0025]

[Action]

 In such a structure, the metal film formed on the end portion of the dummy electrode pattern is cut off at a portion facing the black mask extraction line with the sealing material sandwiched therebetween. A black mask lead line, an insulating film covering the lead line, and an end portion of the dummy electrode pattern are arranged between the two panels.

A portion where three layers of an insulating film, a lead of the first display electrode, and a metal film overlying the lead are arranged between both panels in the other portion where the sealing material is interposed. And an insulating film, a lead of the second display electrode, and a portion where three layers of a metal film which overlaps this lead are arranged, and these portions and the above portion are three layers respectively. Since the film is composed of the above film, the substantially opposing intervals of both panels in each part are equal.

Gap materials mixed in the sealing material are arranged between both panels of the respective parts. However, since the substantially opposing intervals of both panels in the respective parts are equal, the panel is locally formed by the gap materials. Since there is no strong pressure on the panel, the flatness of the panel is maintained.

[0028]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. In addition, the same reference numerals are given to the portions corresponding to the conventional configuration, and the description thereof will be omitted. In this embodiment, the metal film 14 provided on the end portion 13a of the dummy electrode pattern 13 is a part of the metal film 14, that is, the end portion 13a of the dummy electrode pattern 13 sandwiches the sealing material 17 and the lead line of the black mask 3 is formed. 3a is cut off at a portion facing it, and a part of the end portion 13a is exposed by the cutout portion 14a.

Therefore, in this embodiment, in the portion A shown in FIG. 1, as shown in FIG. 3A, the insulating film 4, the lead 5a of the scanning electrode 5 and the lead 5a are provided between the panels 1 and 2. 3 layers with the metal film 6 overlapping therewith are arranged, and in the portion B shown in FIG. 1, as shown in FIG. 3B, the insulating film 4 and the signal electrode 10 are provided between the panels 1 and 2. Three layers of the lead 10a and the metal film 11 which overlaps the lead 10a are arranged. In the portion C shown in FIG. 1, the black mask 3 is provided between the panels 1 and 2 as shown in FIG. Of the lead line 3a, the insulating film 4 covering the lead line 3a, and the end portion 13a of the dummy electrode pattern 13 are arranged.

That is, in each of the parts A, B, and C, three layers of films are arranged between the panels 1 and 2, and therefore, the substantial facing distance H1 between the panels 1 and 2 in the part A, The substantial facing distance H2 between the two panels 1 and 2 in the B portion and the substantial facing distance H3 between the two panels 1 and 2 in the C portion have substantially the same size.

The gap material 21 in the sealing material 17 is interposed between the panels 1 and 2 of these A section, B section, and C section, but since the facing intervals of both panels 1 and 2 are equal in each section, Since the panels 1 and 2 are not locally subjected to strong pressure, the flatness of the panels 1 and 2 can be kept good.

By the way, in this embodiment, when the panels 1 and 2 are polymerized and adhered to each other, the frame-like sealing material 17 is provided in the portion surrounding the display area S, and the panel 1 is further formed. As shown in FIG. 1, a seal material 17a is partially provided between the first ground line 18 formed on the other side and the third ground line 20 formed on the other panel 2 to form the frame-shaped seal. Both panels 1 and 2 are adhered to each other by the material 17 and these partial sealing materials 17a.

This is to increase the adhesive strength between the panels 1 and 2 and to prevent the liquid crystal cells from being separated when the panels 1 and 2 are broken along the slive line L. Is.

FIG. 4 is a cross-sectional view of part D in FIG. 1 in which the first ground line 18 formed on one panel 1 and the third ground line 20 formed on the other panel 2 face each other. It is the street.

As shown in FIG. 4, in the section D, the insulating film 4, the first ground line 18, the third ground line 20, and the third ground line are provided between the panels 1 and 2. Four layers with the metal film 11 overlapping 20 are arranged.

Therefore, the substantial facing distance between the panels 1 and 2 in the A, B, and C portions and the facing distance between the panels 1 and 2 in the D portion are different from each other. If a sealing material 17a is provided between the panels 1 and 2 in the section D, the gap material 21 in the sealing material 17a causes the panels 1 and 2 in the section D to partially receive a strong pressure, and the panel 17 The flatness of 1 and 2 may be impaired.

Therefore, in the present embodiment, in the E portion of FIG. 1 provided with the sealing material 17a, as shown in FIGS. 5 and 6, the widths of the third ground line 20 and the metal film 11 are slightly expanded. In addition, a portion of the metal film 11 facing the first ground line 18 is cut off, a part of the third ground line 18 is exposed through the cut portion 11a, and within the range of the cut portion 11a. The sealing material 17a is provided.

According to such a configuration, as shown in FIG. 5, the first earth line 18 and the earth line 18 are covered between the panels 1 and 2 of the E portion provided with the sealing material 17a. Three layers of the insulating film 4 and the third earth line 20 are arranged, and therefore, the substantial facing distance between the panels 1 and 2 in the E portion where the sealing material 17a is interposed and the frame-shaped sealing material 17 are interposed. The panels 1 and 2 in the section A, B, and C have a substantially equal distance between the panels 1 and 2, so that the gap material 21 in the sealing material 17a causes the panels 1 and 2 in the section E to have a locally strong pressure. Therefore, the flatness of each part of the panels 1 and 2 is kept good.

[0039]

[Effect of device]

 As described above, according to the present invention, both panels adhered by the sealing material are not locally subjected to strong pressure by the gap material mixed in the sealing material, and therefore the flatness of the panel is improved. Therefore, it is possible to improve the display quality when completed as a liquid crystal display element.

[Brief description of drawings]

FIG. 1 is a plan view of a panel assembly for a liquid crystal display device according to an embodiment of the present invention.

FIG. 2 is a plan view of a main part of the panel assembly.

3 is a sectional view of a portion A, a portion B, and a portion C in FIG.

FIG. 4 is a sectional view of a D part in FIG.

5 is a cross-sectional view of a portion E in FIG.

6 is a cross-sectional view taken along the line XX in FIG.

FIG. 7 is a plan view showing one panel and the other panel in a conventional panel assembly for a liquid crystal display device.

FIG. 8 is a sectional view taken along line A1-A1 in FIG.

9 is a sectional view taken along the line A2-A2 in FIG.

10 is a sectional view taken along the line A3-A3 in FIG.

11 is a sectional view taken along line B1-B1 in FIG.

12 is a cross-sectional view taken along the line B2-B2 in FIG.

13 is a sectional view taken along the line B3-B3 in FIG.

FIG. 14 is a plan view of a conventional panel assembly for a liquid crystal display device.

15 is a sectional view of a portion A, a portion B, and a portion C in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Panel 2 ... Panel 3 ... Black mask 4 ... Insulating film 5 ... Scan electrode (1st display electrode) 6 ... Metal film 10 ... Signal electrode 11 ... Metal film 13 ... Dummy electrode pattern 14 ... Metal film 14a ... Excision Part 17 ... Sealing material 18 ... 1st earth line 19 ... 2nd earth line 20 ... 3rd earth line

Claims (1)

[Scope of utility model registration request] 1. A pair of transparent panels for assembling a liquid crystal display device, wherein a black mask is provided inside a display area for displaying an image, and the black mask is provided outside the display area on one panel. A first earth line is formed on the black mask, which is electrically connected via a lead line extending from the black mask.
The first ground line is covered with an insulating film, and a first display electrode is provided inside the display region on the insulating film, and a lead to the first display electrode is provided outside the display region via a lead. A second ground line that conducts is formed, the second ground line conducts to the first ground line, and a metal film is formed on the lead of the first display electrode. The first display electrode arranged inside is covered with an alignment film, and the second display electrode is formed inside the display area on the other panel.
The display electrode is formed with a dummy electrode pattern outside the display area and a third ground line that is electrically connected to the second display electrode via a lead, and is provided on the lead of the second display electrode. A metal film is formed on each end of the dummy electrode pattern, the second display electrode disposed inside the display area is covered with an alignment film, and the one panel and the other panel both have the same structure. Are overlapped so that the display areas face each other, and these two panels are adhered by a frame-shaped sealing material that surrounds the display area, and this sealing material is for maintaining a constant gap between the two panels. The gap material is mixed, and the black mask lead-out line formed on the one panel and the end of the dummy electrode pattern formed on the other panel sandwich the sealing material. In a panel assembly for a liquid crystal display element facing each other, a metal film formed on an end portion of the dummy electrode pattern is provided in a portion facing a lead line of the black mask with the sealing material interposed therebetween. A panel assembly for a liquid crystal display, which is cut off.