JP2001091957A - Sealing frame and liquid crystal device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enlarge a liquid crystal display plane of an individually divided panel and to provide a frame shape to seal the liquid crystal, which brings about more precise coincidence of the centers of the panel and the liquid crystal display plane, in the liquid crystal device manufactured with division into multiple panels. SOLUTION: The sealing frame shapes of the liquid crystal panels adjacent to each other are characterized by the recessing shape of one sealing frame adjacent to the liquid crystal injection port of the other frame.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal device which is particularly useful in a method of manufacturing a plurality of single liquid crystal panels or liquid crystal display devices from two large substrates facing each other. This is an invention relating to a sealing frame.

[0002]

2. Description of the Related Art A liquid crystal device in which a liquid crystal is sandwiched between two electrode substrates is small in size due to its simple structure.
It is used in a wide range of fields such as televisions, personal computers, clocks, display devices for cameras, input devices for touch panels, and optical shutter devices for printers, which require a thin profile. When manufacturing this liquid crystal panel, it is common to arrange a large number of panels of the same shape on a large-sized substrate in a previous process and to simultaneously produce a large number of panels. In particular, in the case of small-sized panels, a large number of products can be produced at the same time.

[0003] A liquid crystal device to be taken in a large number is composed of a single liquid crystal panel, a single liquid crystal cell, or a single liquid crystal device or a plurality of liquid crystal driving electrodes corresponding to the single panel. , And a plurality of sealing frames sandwiched between the large substrates and enclosing liquid crystal corresponding to each panel. FIG. 3 is a perspective plan view of a multi-cavity liquid crystal device showing a conventional embodiment according to the present invention.
FIG. 4 is a sectional view taken along line AA of FIG. a1, a2, a3
.., c1... are panels separated along scribe lines 31 to 31 and 41 to 45 shown by two-dot chain lines. Electrodes (not shown) are wired inside the large substrates 1 and 2 and are opposed to each other across a plurality of sealing frames represented by 11. The sealing frame has the same shape as each panel, and the panels a1, a2, a3,.
11a1, 11a2... 11b1... 11c1.
・ ・An opening B of the sealing frame is a liquid crystal injection port for injecting liquid crystal, and 20 is a space into which liquid crystal is injected.

[0004] The liquid crystal is first injected into the scribe lines 21 to 21.
This is performed in the state of strips a, b, c, and d separated along the line 25. For example, the strip a includes panels a1 to a4.
The strip is placed in a vacuum environment, and the injection port B is brought into contact with a liquid crystal or a liquid crystal immersion material such as a mat type, so that the liquid crystal is sucked into the vacuum space 20. The liquid crystal is injected into a sealing frame filled with the liquid crystal. After the liquid crystal is injected, the liquid crystal injection port B is sealed with a sealing material, and the liquid crystal is completely contained in the sealing frame. Thereafter, the strip is cut along the scribe lines 41 to 42 and divided into individual panels. . As described above, by forming a large number of panels on a large-sized substrate, many panels can be manufactured at the same time.

[0005] The sealing frame is formed by patterning a sealing material on one of the large substrates by printing and pressing the other large substrate. Since the sealing material is a thermosetting soft material, when press-contacting, the inside of the sealing frame first forms a thick space, which is crushed to a predetermined thickness, so that the trapped air is released. Otherwise, internal pressure is created and there is even a risk of puncture. In order for the liquid crystal injection port to play the role of air escape during pressure welding, the injection port must be open even when it is sandwiched between large substrates before scribing. Is not allowed. That is, a gap must be provided around the inlet.

FIG. 5 is an enlarged view of a portion C in FIG. The sealing frame is indicated by dotted hatching. Sealing frames 11a1 and 11b1
Have the same shape, the frame shape is determined by combining the panel a1 and the panel b1. When the liquid crystal is injected in a strip state, an injection protrusion 12 is formed at the injection port B of the sealing frame 11a1 so that the liquid crystal can be reliably injected from the injection port. When injecting the liquid crystal in a vacuum environment, the liquid crystal injection port may have a cross section of the injection protrusion 12 which is the injection port of the sealing frame formed on the same cross section so that no gap is formed between the liquid crystal injection port and the liquid crystal injection port. desired. Also, at the sealing stage of the injection port after the liquid crystal injection, if there is a gap between the scribe section and the sealing port cross section, it is difficult for the sealing material to completely cover the liquid crystal injection port. It is necessary to cut off the cross section of the injection protrusion. Furthermore, if there is a large gap between the injection port and the scribe section, a gap occurs between the sealing material and the scribe section even after the sealing material for sealing the injection port is sealed by the sealing frame from the scribe section,
At this interval, there is a problem that moisture accumulates and deteriorates the sealing material, and in some cases, deteriorates the pixel electrode and the dummy electrode. Therefore, when patterning the sealing frame 11a1 of the panel a1, it is necessary to form the injection protrusion 12 beyond the scribe line 32. As described above, the sealing frame of the adjacent panel b1 has to be provided with a clearance for air escape.

[0007]

Since the operation surface of the liquid crystal is inside the sealing frame, it is desirable to form the sealing frame on the outer periphery of the panel as much as possible in order to widen the liquid crystal surface. In particular, the requirement is greater as the number of small-sized panels for which multi-cavity manufacturing increases the merits becomes greater. However, conventionally, the position of the sealing frame adjacent to the projection has to be located away from the scribe line. That is, in FIG. 5, the position of the sealing frame 11a1 on the injection port side of the panel a1 can be patterned to the position p from the scribe line 32, whereas the sealing frame 11b1 of the panel b2 adjacent to the injection protrusion 12 is Q greater than p from 32
Was able to be patterned only at the position.

Since the panels a1 and b1 have the same shape, the inlet side of the panel b1 is the same as the inlet side of the panel a1. The problem to be solved by the present invention will be described with reference to FIG. 3 taking panel b1 as an example. Panel b1
Are determined by the scribe lines 32 and 33.
On the other hand, the outer end of the sealing frame on the liquid crystal injection port side adjacent to the panel c1 is p from the scribe line 33, and the panel a1 on the opposite side.
Is adjacent to the outer end of the sealing frame from the scribe line 32 to q
It is located far away. Since p <q, the center line of the liquid crystal surface whose shape is determined by the sealing frame having a uniform frame width does not coincide with the center of the panel. That is, the center of both is (q−
p) / 2, the liquid crystal part becomes asymmetric or the injection port side is covered in order to hide the asymmetry, and the effective surface of the liquid crystal part must be reduced in the device incorporated in the panel standard. This is a problem in appearance, particularly when the panel is used as a display device. The effect becomes more remarkable as the size of the display becomes smaller, and the problem has been solved. The scribe line 4 in FIG.
The reason why there is a difference between the positions of the sealing frames 1 and 42 is that the external terminals of the liquid crystal driving electrodes are arranged in the area between the scribe line 42 and the sealing frame. It will not be described.

The present invention is intended to change the patterning shape of the sealing frame, correct the shift between the center of the panel and the center of the liquid crystal display, and increase the effective area of the liquid crystal unit.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a sealing frame having a plurality of sealing frames having a liquid crystal injection port for injecting liquid crystal sandwiched between two large substrates facing each other. In a liquid crystal device using the same, a portion adjacent to the sealing frame adjacent to the liquid crystal injection port has a concave shape.

2. The sealing frame according to claim 1, wherein the width of the concave portion of the sealing frame is smaller than the width of the continuous frame. Further, the inner shape of the concave portion of the enclosing frame has no step with the inner shape of the continuous frame portion.

Further, in a sealing frame for obtaining a plurality of single liquid crystal devices from two opposing large substrates and a liquid crystal device using the same, the large substrate is cut to at least one single liquid crystal device. The liquid crystal injection port forming one adjacent display device and the other sealing frame are arranged opposite to each other with a scribe line (cut line) for cutting out the liquid crystal device as a boundary. The entrance is characterized by projecting at least beyond the scribe line beyond the scribe line toward the enclosing frame of the other liquid crystal device.

Further, in a sealing frame having a sealing frame having an inlet for injecting liquid crystal and a liquid crystal device using the same, a recess is formed in a part of the side of the sealing frame having no inlet. It is characterized by being arranged. Further, in a sealing frame having a sealing frame having an injection port for injecting liquid crystal and a liquid crystal device using the same, a part of a side of the sealing frame having no injection port has a thickness direction from one side. A feature is that a recess is provided in the sealing frame. Further, in a sealing frame having a sealing frame having an injection port for injecting liquid crystal and a liquid crystal device using the same, a part of a side of the sealing frame having no injection port has a thickness from both sides in a thickness direction. A feature is that a recess is provided in the sealing frame. Further, in a sealing frame having a sealing frame having an injection port for injecting liquid crystal and a liquid crystal device using the same, a part of a side of the sealing frame having no injection port has a thickness direction from one side. It is characterized in that a concave portion is provided, and a sealing frame protrudes substantially opposite to the concave portion on the opposite side in the thickness direction.

Further, in a sealing frame for obtaining a plurality of single liquid crystal devices from two opposing large substrates, and in a liquid crystal device using the same, at least one single substrate is cut by cutting the large substrate. The liquid crystal injection port forming one adjacent display device and the other sealing frame are arranged opposite to each other with a scribe line (cut line) for cutting out the liquid crystal device as a boundary. A sealing frame having a sealing frame having an inlet for injecting liquid crystal, and an entrance projecting at least beyond the scribe line beyond the scribe line to the enclosing frame side of the other liquid crystal device, and a liquid crystal device using the same , Wherein a recess is provided on a part of the side of the sealing frame that does not have an injection port. Further, in a sealing frame having a sealing frame having an injection port for injecting liquid crystal and a liquid crystal device using the same, a part of a side of the sealing frame having no injection port has a thickness direction from one side. A feature is that a recess is provided in the sealing frame. Further, in a sealing frame having a sealing frame having an injection port for injecting liquid crystal and a liquid crystal device using the same, a part of a side of the sealing frame having no injection port has a thickness from both sides in a thickness direction. A feature is that a recess is provided in the sealing frame. Further, in a sealing frame having a sealing frame having an injection port for injecting liquid crystal and a liquid crystal device using the same, a part of a side of the sealing frame having no injection port has a thickness direction from one side. It is characterized in that a concave portion is provided, and a sealing frame protrudes substantially opposite to the concave portion on the opposite side in the thickness direction.

Further, in a sealing frame for obtaining a plurality of single liquid crystal devices from two opposing large substrates and a liquid crystal device using the same, at least one of the sealing substrates is cut by cutting the large substrates.
A liquid crystal injection port forming one adjacent single display device and the other sealing frame are disposed opposite to each other with a scribe line (cut line) for cutting out one single liquid crystal device as a boundary. The surface of the other liquid crystal device on the side of the injection port facing the injection port and the scribe line as a boundary has a recess.

Further, in a sealing frame for obtaining a plurality of single liquid crystal devices from two opposing large substrates, and in a liquid crystal device using the same, at least one
A liquid crystal injection port forming one adjacent single display device and the other sealing frame are disposed opposite to each other with a scribe line (cut line) for cutting out one single liquid crystal device as a boundary. The surface on the injection port side of the portion of the sealing frame of the other liquid crystal device facing the injection port and the scribe line as a boundary forms a recess, and the surface of the sealing frame on the opposite side to the recess projects. Features.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below based on examples with reference to the drawings. FIG. 1 shows a first embodiment of the invention.
FIG. 4 is a partially enlarged view corresponding to a portion C in FIG. 3 in the embodiment. Other configurations of the liquid crystal device according to the present invention are the same as those shown in FIGS. 3 and 4 used in the description of the prior art, and the same components are denoted by the same reference numerals. Further, since the sealing frames of the respective panels are the same, the sealing frames 13a1 and 13b1 have the same shape, and the features of the sealing frame in the present embodiment are shown in the D portion of the panel b1. The periphery of the injection protrusion 12 of the panel a1 secures a clearance for air escape like the part D, and the sealing frame other than the part D has a position r (for example, 200 μm) from the scribe line along the scribe line with p. They were arranged to be equal.
As a result, the shape of the peripheral sealing frame adjacent to the injection protrusion 12 is concave. This means that the position t (for example, 1200 μm) from the scribe line 32 inside the sealing frame.
In m), the same size as the position s in the frame on the liquid crystal injection port side can be obtained, and the center of the liquid crystal surface to be sealed and the center of the panel appear to be coincident with each other, so that a panel having a wide liquid crystal surface can be realized.

In setting the width of the sealing frame, there is a demand that the sealing frame be as wide as possible in view of the mechanical strength for bonding the substrate and the quality conditions for shielding the enclosed liquid crystal from humidity and harmful substances to prevent deterioration. There is a conflicting demand to increase the liquid crystal surface, that is, to reduce the width of the sealing frame, and the width is set as narrow as possible in consideration of these. It has been found that, based on this as a whole, a narrower frame width can be set if it is partial. In the present embodiment, taking advantage of this fact, the width of the D portion is set to be smaller than other reference widths. As a result, the center of the liquid crystal surface and the center of the panel become more coincident with each other, and the application range of a device to which this panel is mounted is expanded. For example, if the width of the D part is 900
From 800μm Other reference width 1000μm ± 100μ
The setting is even narrower than m. By doing so,
The center of the liquid crystal surface and the center of the panel become more coincident with each other, and the application range of the device to which this panel is mounted is expanded.

FIG. 2 shows a second embodiment of the present invention and is a partially enlarged view corresponding to a portion C in FIG. Like FIG. 2, components corresponding to the prior art are denoted by the same reference numerals as in FIGS. 14a1 and 14b1 denote the sealing frames of the present embodiment having the same shape, and 15a1 and 15b1 painted in black denote the print application shapes before forming the sealing frames. In this embodiment,
Using the fact that the frame width of the sealing frame described with reference to FIG. 1 can be reduced if there is a partial portion, the shape of the sealing frame 14b1 in the E portion corresponding to the D portion in FIG. It was done. As a result, the position s inside the sealing frame inside the E portion is
(For example, 1200 μm) is also a position t (for example, 1200 μm) inside the sealing frame on the injection side from the scribe line 32.
The center of the liquid crystal surface and the center of the panel completely coincide with each other, so that a panel having a good balance between left and right and a large effective liquid crystal surface can be provided.

A method for realizing this shape by a printing method will be described. The anisotropic conductive sealing material used as the sealing material is a material in which a conductive material and particles are mixed with a thermosetting insulating material as the main component. It is printed on one of the large substrates, and it is sandwiched between other substrates in a press-contact manner. It is necessary to obtain a predetermined shape while securing a predetermined thickness. The printed sealing material has a wider shape than the application time by the pressure contact of the large substrate due to the pressure contact, so that it must be made narrow at the time of printing in anticipation of the spread. The expansion ratio is determined by the ratio of the gap between the sealing frames of the two large substrates and the thickness of the sealing material at the time of printing. Therefore, the printing shape may be set to be the reciprocal multiple of the spreading magnification with respect to the sealing frame width along the center line of the final sealing frame shape. FIG. 2 shows a printing situation when the spread rate is about twice. 14a for sealing frame
The width of the print encapsulants 15a1 and 15b1 is about half that of the print sealants 15a1 and 15b1. In this way, it is possible to realize a sealing frame shape in which the outer shape of the sealing frame is concave while the inner shape is not uneven.

[0021]

As described above, according to the present invention, when manufacturing a liquid crystal device having a large number of pieces, the sealing frame shape of the panel adjacent to the liquid crystal injection port is made concave, thereby manufacturing the liquid crystal device. Air can be released from the liquid crystal enclosing space necessary for the device, and at the same time, the inside of the sealing frame can be expanded and the effective area of the liquid crystal surface can be expanded, so that the apparent improvement of the center of the liquid crystal surface and the center of the panel is realized .

Also, by partially narrowing the concave portion of the sealing frame from the other frame widths, the liquid crystal surface is also widened, and the center of the liquid crystal surface is brought closer to the center of the panel while ensuring panel quality. Expand the range of use.

Further, the inner shape of the recessed portion of the sealing frame and the inner shape of the continuous sealing frame are eliminated to eliminate a step, whereby the center of the liquid crystal surface and the center of the panel are completely matched, and the balance between the left and right is good, and , A panel having a large liquid crystal surface can be provided.

Further, since the sealing material for closing the injection port substantially matches the scribe, there is no space between the sealing material and the scribe cross section after the sealing, so that the conventional problem that water is accumulated and the sealing material is removed. This has the effect of not causing the problem of deterioration or, in some cases, deterioration of the pixel electrode and the dummy electrode.

[Brief description of the drawings]

FIG. 1 is a partial view of a liquid crystal device in which a sealing frame has a concave shape according to one of the embodiments of the present invention.

FIG. 2 is a partial view of a liquid crystal device according to another embodiment of the present invention, showing a sealing frame shape in which a step inside a concave sealing frame is eliminated.

FIG. 3 is a perspective plan view of a liquid crystal device in which a large number of devices are taken, showing the prior art.

FIG. 4 is a sectional view taken along the line AA in FIG. 3;

FIG. 5 is an enlarged view of a portion C in FIG. 3 showing a conventional sealing frame shape.

[Explanation of symbols]

 1, 2 Large substrate 11, 11a1 to 11c1 Sealing frame 12 Injection protrusion 13a1, 13b1 Sealing frame 14a1, 14b1 Sealing frame 15a1, 15b1 Shape of sealing material 31 to 34, 41 to 45 Scribe line B Liquid crystal injection port D, E concave part

Claims (14)

[Claims] 1. A sealing frame for holding a liquid crystal, said sealing frame having a liquid crystal injection port for injecting a liquid crystal, and said sealing frame is provided between two opposing large substrates. In a sealing frame provided with a plurality of liquid crystal devices and a liquid crystal device using the same, an adjacent portion of the sealing frame adjacent to the liquid crystal injection port has a concave shape. A sealing frame and a liquid crystal device using the same. 2. The sealing frame according to claim 1, wherein the width of the concave portion of the sealing frame is smaller than the width of the continuous frame. 3. The sealing frame according to claim 1, wherein the inner shape of the concave portion of the enclosing frame has no step with the inner shape of the continuous frame portion. apparatus. 4. A sealing frame for obtaining a plurality of single liquid crystal devices from two opposing large substrates, and a liquid crystal device using the same, wherein the large substrate is cut and one or more single substrates are cut. A liquid crystal injection port forming one adjacent liquid crystal device and a second sealing frame are arranged to face each other with a scribe line (cut line) for cutting out the liquid crystal device being opposite to each other. And a liquid crystal device using the sealing frame, wherein at least the scribe line projects beyond the scribe line and beyond the scribe line toward the enclosing frame of the other liquid crystal device. 5. A sealing frame having a sealing frame having an injection port for injecting liquid crystal, and a liquid crystal device using the sealing frame, wherein a recess is formed in a part of a side of the sealing frame which does not have an injection port. A sealing frame and a liquid crystal device using the sealing frame. 6. A sealing frame having a sealing frame having an injection port for injecting liquid crystal and a liquid crystal device using the same, wherein one side of the sealing frame having no injection port has one side. A sealing frame in which a recess is provided in a sealing frame from a thickness direction, and a liquid crystal device using the sealing frame. 7. A sealing frame having a sealing frame having an injection port for injecting liquid crystal and a liquid crystal device using the same, wherein both sides of the sealing frame having no injection port have both sides. A sealing frame in which a recess is provided in a sealing frame from a thickness direction, and a liquid crystal device using the sealing frame. 8. A sealing frame having a sealing frame having an injection port for injecting liquid crystal and a liquid crystal device using the same, wherein one side of the sealing frame having no injection port has one side. A sealing frame and a liquid crystal device using the sealing frame, wherein a concave portion is provided from the thickness direction, and the sealing frame projects substantially opposite to the concave portion on the opposite side in the thickness direction. 9. A sealing frame having a sealing frame having an inlet for injecting liquid crystal and a liquid crystal device using the same, wherein a recess is formed in a part of a side of the sealing frame not having an inlet. The sealing frame according to claim 4, wherein the sealing frame is provided and a liquid crystal device using the sealing frame. 10. A sealing frame having a sealing frame having an injection port for injecting liquid crystal, and a liquid crystal device using the same, wherein one side of the sealing frame having no injection port has one side. 5. The sealing frame according to claim 4, wherein a recess is provided in the sealing frame from a thickness direction. 11. A sealing frame having a sealing frame having an injection port for injecting liquid crystal, and a liquid crystal device using the same, wherein both sides of the sealing frame having no injection port have both sides. 5. The sealing frame according to claim 4, wherein a recess is provided in the sealing frame from a thickness direction. 12. A sealing frame having a sealing frame having an injection port for injecting liquid crystal, and a liquid crystal device using the same, wherein one side of the sealing frame having no injection port has one side. 5. The sealing frame according to claim 4, wherein a recess is provided from the thickness direction, and the sealing frame projects substantially opposite to the recess in a direction opposite to the thickness direction. 13. A sealing frame for obtaining a plurality of single liquid crystal devices from two opposing large substrates, and a liquid crystal device using the same, wherein the large substrate is cut and at least one single liquid device is cut. The liquid crystal injection port forming one adjacent display device and the other sealing frame are arranged to face each other with a scribe line (cut line) for cutting out the liquid crystal device as a boundary. A sealing frame and a liquid crystal device using the sealing frame, characterized in that a surface of the sealing frame of the other liquid crystal device facing the entrance and the scribe line has a recess on the side of the injection port. 14. A sealing frame for obtaining a plurality of single liquid crystal devices from two opposing large substrates, and a liquid crystal device using the same, wherein the large substrate is cut to at least one single single device. The liquid crystal injection port forming one adjacent display device and the other sealing frame are arranged to face each other with a scribe line (cut line) for cutting out the liquid crystal device as a boundary. Sealing characterized in that the surface on the injection port side of the sealing frame portion of the other liquid crystal device facing the entrance and the scribe line as a boundary forms a recess, and the surface of the sealing frame on the opposite side to the recess protrudes. A frame and a liquid crystal device using the same.