JPH10213807A - Liquid crystal display element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the liquid crystal display element which is good in the adhesive strength of a seal material and its sealing property and also reliable by providing a wall body at the border part between the seal material and an electrically conductive material and then setting the seal material and electrically conductive material in an isolated state. SOLUTION: On an array substrate 2, a supply electrode 8 which supplies a voltage to a common electrode on an opposite substrate 1 is arranged, and the common electrode 7 and supply electrode 8 are electrically connected by the electrically conductive material 10. Then, the wall body 12 is arranged at the border part between the seal material 9 and electrically conductive material 10. The wall body 12 is constituted by laminating a blue colored layer 4, a green colored layer 5, and a red colored layer 6 which are different in color from a light shield layer and those colored layers 4 to 6 are formed in the same process with a colored layer arranged on the opposite substrate 1. The colored layers 4 to 6 constituting the wall body 12 become smaller in size in the lamination order. Then when the colored layers 4 to 6 are projected on the substrates 1 and 2, projection areas of all the colored layers 4 to 6 are interposed between the seal material 9 and electrically conductive material 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a liquid crystal display device, and more particularly to an active matrix type liquid crystal display device.

[0002]

2. Description of the Related Art For example, an active matrix type liquid crystal display device has a structure in which a liquid crystal layer is sandwiched between an array substrate and a counter substrate, and the two substrates are bonded to each other by a sealing material arranged in a peripheral region. You are. The supply of voltage to the common electrode on the counter substrate is performed from a supply electrode disposed on the array substrate, and the supply electrode and the common electrode are electrically connected by an electrically conductive material.

In recent years, for the purpose of reducing the size of a liquid crystal display element, it has been desired to reduce the area other than the display area of the liquid crystal display element, that is, to narrow the frame. With the narrowing of the frame, the sealing material and the electric conduction material overlap each other.

[0004]

However, since the sealing material and the electrically conductive material are applied in an uncured state, the adhesion between the substrate and the substrate in a portion where the sealing material and the electrically conductive material overlap and the sealing performance when a liquid crystal display element is formed are deteriorated. And the reliability is impaired.

[0005] The present invention has been made in view of the above circumstances,
Even in a frame-narrowed liquid crystal display element, the adhesion of the sealing material,
It is an object of the present invention to provide a highly reliable liquid crystal display element having good sealing properties of the liquid crystal display element.

[0006]

According to the structure of the present invention,
To provide a wall at the boundary between the sealing material and the electrical conducting material,
When the sealing material and the electrical conductive material are close to each other, the uncured sealing material and the electrical conductive material spread along the wall, so that the sealing material and the electrical conductive material are separated from each other while the sealing material and the electrical conductive material are separated. The conductive material can be cured. This allows
There is no possibility that the sealing material and the electrical conductive material are mixed, and the adhesion of the sealing material and the sealing performance of the liquid crystal display element are not reduced.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is a partial plan view of the liquid crystal display element showing a place where the electrically conductive material is arranged. FIG. 2 includes a partial cross-sectional view taken along line AA ′ in FIG. FIG. 3 is a schematic cross-sectional view of the liquid crystal display element showing a position where the liquid crystal display element is arranged. FIG. 3 is an enlarged sectional view and an enlarged plan view showing the structure of the wall body. FIG. 4 is a plan view showing the positional relationship between the sealing material, the wall body, and the electrical conductive material before the two substrates are bonded together.

As shown in FIGS. 1 and 2, the liquid crystal display device of the present embodiment has a liquid crystal layer between an opposing substrate 1 as a first electrode substrate and an array substrate 2 as a second electrode substrate. 13 is held therebetween, and a spherical spacer 11 is disposed in order to maintain a substrate gap between the opposing substrate 1 and the array substrate 2. The opposing substrate 1 and the array substrate 2 are adhered to each other by a sealing material 9 arranged at a peripheral portion.

On the opposing substrate 1, a lattice-shaped light-shielding layer (not shown) is arranged in the display area, and a frame-shaped light-shielding layer (not shown) is arranged around the substrate. Colored layers (not shown) of a plurality of colors of R (red), G (green), and B (blue) are arranged in the gaps between the layers, and a common first electrode is formed on these light-shielding layers and the colored layers. It has a structure in which the electrodes 7 are arranged.

On the other hand, a plurality of signal lines (not shown) and a plurality of gate lines (not shown) formed on the array substrate 2 so as to cross one main surface, and these signal lines and gate lines Switching element (not shown) formed at each intersection with
And a pixel electrode serving as a second electrode. A supply electrode 8 for supplying a voltage to the common electrode 7 on the counter substrate 1 is disposed on the array substrate 2.
Is electrically conducted by the electric conducting material 10. The wall 1 is located at the boundary between the sealing material 9 and the electrical conduction material 10.
2 are arranged.

As shown in FIG. 3, the wall 12 is
And a blue colored layer 4, a green colored layer 5, and a red colored layer 6 having different colors from each other.
Are formed in the same step as the step of forming the colored layer disposed on the counter substrate 1. The size of the colored layers constituting the wall 12 is reduced in the order of lamination. When each colored layer constituting the wall 12 is projected on the substrate, the projected area of all the colored layers is interposed between the sealing material 9 and the electric conduction material 10 as shown in FIG. Has become. Wall 12
Has a curved shape when the wall 12 is projected onto the opposing substrate 1 or the array substrate 2.
Alternatively, it has a shape that partially surrounds the contour of the projected shape when the electrical conductive material 10 is projected onto the array substrate 2.

Next, a method for manufacturing the liquid crystal display element of the present embodiment will be described. First, a grid-shaped light-shielding layer, a frame-shaped light-shielding layer, and a wall light-shielding layer 3 were formed on a glass substrate using a black resin. Here, the taper angle between the end portion of the wall light shielding layer 3 and the glass substrate was set to θ = 40 °. next,
Colored layers made of three colors of resin were formed in stripes by photolithography so as to fill the gaps between the lattice-shaped light-shielding layers. In the colored layer forming step, the blue colored layer 4
The green coloring layer 5 and the red coloring layer 6 were each formed into a curved shape, and were laminated to form the wall 12. The colored layers 4, 5, and 6 constituting each wall 12 have a taper angle of θ = θ
40 °. At this time, the height of the colored layer portion of the stepped wall was set to about 5.1 μm, and the width of the uppermost red colored layer 6 was set to 10 μm. The taper angle at the end of the wall light-shielding layer 3 and the colored layer constituting the wall is preferably 50 ° or less, more preferably 40 ° or less. This is to prevent the common electrode formed on the entire surface of the counter substrate after the formation of the wall from being disconnected due to the end shape of each layer constituting the wall. Furthermore, in the present embodiment, the light-shielding layer and the coloring layer constituting the wall are configured so that each time the layer is laminated, the next layer is arranged in a region of the previously formed layer projected on the substrate. Thus, a wall body having a tapered shape in which the cross-sectional area cut substantially parallel to the substrate becomes smaller as the distance from the substrate increases. This can reduce the occurrence of disconnection of the electrode due to the presence of the wall. After forming the colored layer and the wall, ITO is applied to the entire surface of the glass substrate.
Was deposited to form a common electrode, an alignment film material was arranged on the common electrode by a printing method, and a rubbing treatment was performed to form an alignment film, thereby forming a counter substrate.

Next, a plurality of signal lines and a plurality of gate lines formed on a glass substrate so as to intersect on one main surface by a known manufacturing method, and for each intersection of these signal lines and gate lines, The formed switching element, the pixel electrode, and the supply electrode for supplying a voltage to the common electrode on the counter substrate 1 are arranged, the alignment film is arranged on the entire surface by a printing method, and the rubbing process is performed to form the alignment film. Thus, an array substrate was formed.

Next, a thermosetting sealing material was applied on the counter substrate so as to be in contact with the blue colored layer 4 outside the curved arc of the wall 12 as shown in FIG. Thereafter, an electrical conductive material was applied to a location B in FIG. 4 that is inside the arc of the curved wall 12. Thereafter, the opposing substrate and the array substrate are bonded together via a spherical spacer so that the electrical conductive material applied on the opposing substrate and the supply electrode arranged on the array substrate overlap, and the pressure is set to 180 ° C. Was left in the furnace for 1 hour to cure the sealing material, thereby forming a liquid crystal display cell. As shown in FIG. 1, the vicinity of the electric conductive material forming region of the liquid crystal display cell in this state is in a state where the sealing material 9 and the electric conductive material 10 are separated from each other with the wall 12 as a boundary.

Thereafter, a liquid crystal composition was injected into the liquid crystal cell by a vacuum injection method to form a liquid crystal layer, thereby obtaining a liquid crystal display device. As described above, in the present invention, since the wall is provided at the boundary between the sealant and the electrical conductive material, the sealant and the electrical conductive material are separated from each other in a state where the sealant and the electrical conductive material are separated by the wall. It can be cured, and does not cause a decrease in the adhesion of the sealing material and the sealing of the liquid crystal display element.

Further, since the wall is formed in the same step as the colored layer disposed on the counter substrate, a separate step for forming the wall is not required, and the number of manufacturing steps does not need to be increased. Further, in the present embodiment, spherical spacers are used to maintain the distance between the substrates, but the spacers may be formed by laminating the colored layers in the same step as the formation of the colored layers. It is possible to reduce the number of steps for dispersing the spherical spacer.

In this embodiment, since the wall is formed in a curved shape so as to surround a part of the outline of the electrical conductive material, the electrical conductive material is formed at the end of the wall when the wall is projected onto the substrate. It can be more reliably prevented from protruding into the sealing material forming region. In the present embodiment, the wall is formed in a curved shape, but may be formed in a key shape as shown in FIG.
As shown in FIG. 5 (b), the shape may be such that it surrounds all the electrically conductive material.

In the case where the common electrode is formed on the wall, when the common electrode is cut substantially parallel to the electrode substrate in order to reduce the occurrence of disconnection of the common electrode on the wall due to the presence of the wall. It is desirable to configure the wall so that the cross-sectional area of the cross section of the wall becomes smaller as the distance from the counter substrate increases.

[0019]

According to the present invention, since a wall is provided at the boundary between the sealing material and the electrical conductive material, the sealing material and the electrical conductive material are separated from each other with the wall separating the sealing material and the electrical conductive material. Can be cured, and the adhesion of the sealing material and the sealing of the liquid crystal display element do not decrease. This makes it possible to provide a highly reliable liquid crystal display element even in a liquid crystal display element with a narrow frame.

[Brief description of the drawings]

FIG. 1 is a partial plan view showing a place where an electrically conductive material of a liquid crystal display element according to an embodiment of the present invention is disposed.

FIG. 2 is a schematic cross-sectional view of a peripheral region including an electric conductive material, including a cross-sectional view taken along line AA ′ of FIG. 1;

FIGS. 3A and 3B are an enlarged sectional view and an enlarged plan view showing a structure of a wall body according to an embodiment of the present invention. FIGS.

FIG. 4 is a plan view showing a positional relationship between a sealing material, a wall, and an electrical conductive material before two substrates of a liquid crystal display element according to an embodiment of the present invention are attached to each other.

FIG. 5 is a schematic plan view showing another embodiment of the liquid crystal display device of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Counter substrate 2 ... Array substrate 3 ... Light shielding layer 4 ... Blue coloring layer 5 ... Green coloring layer 6 ... Red coloring layer 7 ... Common electrode 8 ... Supply electrode 9 ... Sealing material 10 ... Electric conduction material 12 ... wall 13 ... liquid crystal layer 20 ... liquid crystal display element

Claims (5)

[Claims] A first electrode substrate having a first electrode; a second electrode substrate having a second electrode; and a substrate for bonding the first electrode substrate and the second electrode substrate. A sealing material disposed around the first electrode substrate and the second electrode substrate; a liquid crystal layer sandwiched in a gap between the first electrode substrate and the second electrode substrate; A liquid crystal display comprising: a supply electrode configured to supply a voltage to the first electrode disposed on a second electrode substrate; and an electrically conductive material configured to electrically connect the first electrode and the supply electrode. A liquid crystal display element, wherein a wall is disposed at a boundary between the sealing material and the electrical conductive material. 2. A multi-colored layer is disposed on the first electrode substrate or the second electrode substrate, and the wall is formed by laminating two different colors of the colored layer. 2. The liquid crystal display device according to claim 1, wherein: 3. The projection shape when the wall is projected on the first electrode substrate or the second electrode substrate is the first electrode substrate or the second electrode substrate.
The liquid crystal display device according to claim 1, wherein the liquid crystal display device surrounds at least a part of a contour of a projection shape when the electric conductive material is projected on the electrode substrate or the second electrode substrate. 4. The liquid crystal according to claim 1, wherein a projection shape when the wall is projected onto the first electrode substrate or the second electrode substrate has a curved shape. Display element. 5. The wall body is arranged on the first electrode substrate, the first electrode is arranged on the wall body, and the wall body is the first electrode of the wall body. 3. The liquid crystal display device according to claim 1, wherein a cross-sectional area of a cross section when cut substantially parallel to the electrode substrate decreases as the distance from the first electrode substrate increases.