JP2002250817A - Liquid crystal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal display device of which the front and the rear of the cell for correction can be visually discriminated with ease even when an injection port of the liquid crystal display is formed on a center line of the cell for correction and of which the yield of the single cell for correction is improved even when a specified gap is provided in the vicinity of the injection port formed on a sealant frame of a large sized substrate and a shape of a sealant for the device. SOLUTION: The liquid crystal injection port 14 for the cell for correction 10 is provided on a line of symmetry 15 of a lower side edge 13-3 of the sealant frame 13. A recessed part 17 is formed on a part of an upper side edge 13-1 opposite thereto, in a state that is inclined to a previously determined region out of regions 16R, 16L of a part to be filled with the liquid crystal 16 defining the line of symmetry 15 as a boundary.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

2. Description of the Related Art Conventionally, as a display device used for a portable personal computer, an information device such as a portable TV, and a terminal device such as a mobile phone, a liquid crystal device and a liquid crystal display device suitable for small and thin are marketed. Have been around. The present invention relates to a liquid crystal device used in a liquid crystal printer, a liquid crystal television receiver, and a liquid crystal display device found in a liquid crystal monitor, and particularly to a seal shape thereof.

[0002]

2. Description of the Related Art For example, a liquid crystal display device that drives a liquid crystal of a liquid crystal panel to display an image is different from a liquid crystal display panel using a TN liquid crystal in a liquid crystal display panel using an STN liquid crystal. Electric field driven operation rotation angle is 90 °
From 180 ° to 270 °. As a result, due to the influence of the birefringence of the liquid crystal, the light transmitted through the liquid crystal display panel tends to be colored blue or yellow, and the display quality tends to be significantly deteriorated. To prevent this,
There is a configuration in which a liquid crystal display device is formed by laminating a film-shaped retardation plate or a correction liquid crystal panel for correction on a liquid crystal display panel. On the other hand, in recent years, a liquid crystal display device using a TN liquid crystal has also been provided with a correction liquid crystal panel (hereinafter, referred to as a liquid crystal panel) for the purpose of improving the viewing angle.
Correction cells).

As described above, in a liquid crystal display device using a correction cell, the correction cell can be manufactured in almost the same process as that of the liquid crystal display panel, so that the process management is easy.
There was no electrode pattern, and the dimensions of the upper and lower substrates, which were transparent substrates, were the same, and it was difficult to visually distinguish between the front and back surfaces, making it difficult to distinguish between the front and back surfaces.

A conventional liquid crystal display device which solves the above problem and a configuration of a seal shape thereof will be described with reference to the drawings. FIG. 5 is a schematic exploded perspective view of a conventional liquid crystal display device, and FIG.
Is a plan view showing a state in which the upper substrate of the correction cell is partially broken, FIG. 7 is a plan view showing a state in which a large substrate of the correction cell is partially broken, and FIG. It is an enlarged plan view.

As shown in FIGS. 5 and 6, a liquid crystal display device 100 generally used in the prior art is configured by appropriately stacking a correction cell 110 and a liquid crystal display panel 120. The correction cell 110 is attached with a gap provided between a pair of upper and lower substrates 111 and 112 in which a polarizing plate (not shown) is adhered to an upper substrate 111 via a seal frame 113. In addition, at the lower side of the seal frame 113, the injection port 1 is provided.
After liquid crystal is injected into the above-described gap from the injection port 114, the injection port 114 is sealed with a resin (not shown).

Further, as shown in FIG.
The liquid crystal display panel 120 of FIG. 1 has a gap such that an upper substrate 121 and a lower substrate 122, which are a pair of transparent substrates having a transparent electrode, an alignment film, and a polarizing plate (both not shown), face each other with a seal member 123 interposed therebetween. The liquid crystal is injected into the gap from an injection port (not shown). An IC chip 124 for driving liquid crystal is mounted on the lower substrate 122 by COG or the like.

Further, as shown in FIG. 6, an inlet 1 of a seal frame 113 in which a sealant for the correction cell 110 is formed by printing or the like.
14 is disposed so as to be deviated by the deviation amount L with respect to the symmetry line 115. The amount of displacement L is such that the injection port 114 is, for example,
The deviation amount is set to an appropriate amount that allows the user to easily determine which of the six regions 116R and 116L is located. Then, the front and back of the correction cell 110 are determined based on the direction of the deviation.

[0008]

However, in the above-described correction cell 110 of the conventional liquid crystal display device 100, as shown in FIGS.
13-3, an injection port 1 having a predetermined length S1
From 14, the liquid crystal is injected into the liquid crystal filling portion 116 by vacuum injection and diffuses. Then, the liquid crystal is diffused and filled according to the distance from the injection port 114 in the order of the corners P1, P2, P3, and P4, which are the four corners in the liquid crystal filling portion 116, but the region 116C near the corner P2 to be filled last. In such a case, air bubbles and the like are easily generated, and the display quality is degraded. In the worst case, the product becomes defective and the yield is reduced, leading to an increase in the cost of the product.

Also, as shown in FIG.
Is formed by forming a sealant on one of the large substrates 131 by screen printing or the like, and pressing the other large substrate 132 against the other. The seal frame 113 is made of a thermosetting material such as an epoxy adhesive.
Since the space in the space 13 is pressed to form a predetermined gap, unless the air trapped in the space in the seal frame 113 is allowed to escape, an internal pressure may be generated and the large-sized substrate 130 may even be damaged.

Therefore, as shown in FIGS. 7 and 8, when the injection port 114 is in contact with the seal frame of the adjacent display panel, it plays a role of releasing air from the liquid crystal filling portion when the large substrate 130 is pressed. The large substrate 13 before being divided
The liquid crystal filling portion must be open even at the stage where it is held at 0, which causes a problem if it is in contact with the adjacent upper side 113-1 to form a frame of a blind alley. In the vicinity of the inlet 114,
It is necessary to provide a predetermined interval S3.

That is, as shown in FIGS. 7 and 8, the distance between the first single correction cell 110-1 and the adjacent second single correction cell 110-2 on the large substrate 130 is as follows. S1 shown in FIG. 8 is the first correction cell 11
0-1 is the distance between the seal frame 113-3 and the dividing line X, S2 is the distance between the second correction cell 110-2 and the dividing line X, and S3 is the distance between the first correcting cell 110-1. Inlet 1
14 is the distance between the tip of the seal 14 and the seal frame 113-1. First
The tip of the injection port 114 of the correction cell 110-1 of FIG.
In this case, the tip of the injection port is not located inside the dividing line X. At this time, the tip of the injection port 114 projecting from the sealing frame 1 of the second correction cell 110-2 is formed.
13-1. In this state, the injection port 1 of the first correction cell 110-1 is displaced due to misregistration in printing.
14 and the sealing frame 113-1 are in contact with each other to seal the injection port of the correction cell. When the upper and lower large substrates are thermocompression-bonded using the sealing frame, the air in the seal expands due to heat, and the liquid crystal injection section is expanded. May be destroyed.

The present invention has been made in view of the above problem, and the state of the front and back of the correction cell can be visually checked even if the injection port of the seal frame formed in the correction cell is formed on a symmetrical line. It is an object of the present invention to provide a liquid crystal display device and a seal shape thereof that can be easily distinguished by using. Further, it is an object of the present invention to provide a liquid crystal display device capable of improving the yield (the number of correction cells) of a single correction cell manufactured from a large-sized substrate and a seal shape thereof.

[0013]

According to the liquid crystal device of the present invention, at least two gaps for injecting and sealing liquid crystal are provided.
A liquid crystal device having a configuration in which a plurality of substrates are arranged to face each other, a seal member having an injection port for injecting the liquid crystal is arranged around the gap, and the liquid crystal is sealed by the seal member. A concave portion is formed on a side of the seal member facing the inlet, for determining whether the liquid crystal device is front or back.

Further, the recess has a recess on the left and right with respect to the injection port, and the left and right recesses have a seal shape formed at a position asymmetric with respect to the injection port.

[0015] Further, the present invention is characterized in that the left and right recesses have a seal shape composed of continuous recesses.

Further, the injection port is formed on one side, and is disposed substantially at the center of the side.

The width of the concave portion is wider than the depth of the concave portion, and the width of the concave portion is wider than the width of the inlet.

Further, the concave portion is arranged so as to be biased to one end of the side where the concave portion is provided.

Further, at least corresponding to the first and second liquid crystal devices adjacent to each other, at least an electrode and a sealing member having an injection port are formed by cutting a large substrate having a plurality formed along a cutting line. In the obtained liquid crystal device, the first
A first side provided on the seal member of the second liquid crystal device is disposed so as to face a first inlet of the liquid crystal device, and the first inlet is provided on the first side. Has a recess in the direction opposite to the first inlet so as to cover
A large-sized substrate having a configuration in which the tip of the first injection port protrudes toward the recess on the first side beyond the cutting line is inserted between the first side and the recess. It is obtained by cutting along the cutting line so that the tip of the entrance remains.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a liquid crystal display device which is an example of a liquid crystal device according to the present invention will be described with reference to FIGS.
It will be described based on. FIG. 1 is a schematic exploded perspective view of a liquid crystal display device according to the present invention, FIG. 2 is a plan view showing a state in which the upper substrate of the correction cell is partially broken, and FIG. FIG. 4 is an enlarged plan view of a portion A in FIG.

As shown in FIGS. 1 and 2, a liquid crystal display device 1 according to the present invention comprises a correction cell 10 and a liquid crystal display panel 2.
0 is appropriately laminated. Correction cell 10
Are bonded to each other with a gap provided between a pair of upper substrates 11 and a lower substrate 12 having a polarizing plate (not shown) bonded to the upper substrate 11 with a seal frame 13 interposed therebetween. In addition, an injection port 14 is formed on the lower side 13-3 of the seal frame 13, and after the liquid crystal is injected from the injection port 14 into the gap described above,
The inlet 14 is formed by resin sealing (not shown).

In the liquid crystal display device 1, an upper substrate 21 and a lower substrate 22, which are a pair of transparent substrates having a transparent electrode, an alignment film, and a polarizing plate (both not shown), face each other via a seal frame 23. The gaps are provided with a gap as described above, and the liquid crystal is injected into the gap from an injection port (not shown). On the lower substrate 21, an IC chip 24 for driving liquid crystal is mounted by COG or the like. In some cases, an IC for driving the liquid crystal is not mounted. Also, the upper substrate 21
Alternatively, a flexible circuit board (not shown) for connecting to a circuit board (not shown) provided outside the liquid crystal display device is connected to at least one substrate of the lower substrate 22. To drive the liquid crystal.

Next, as shown in FIG. 2, the correction cell 10 has a seal frame 13 as a seal member formed by screen printing of a sealant. The shape of the seal frame 13 includes a lower side 13-3 facing the upper side 13-1 and a side 1
The injection port 14 is arranged on a symmetrical line 15 which is a center line of the lower side 13-3 of the correction cell 10 in a four-sided frame shape of 3-2 and 13-4. The correction cell 1 is provided in a part of the upper side 13-1 opposite to the lower side 13-3 in which the injection port 14 is provided.
A concave portion 17 for determining the front and back of 0 is formed.
The concave portion 17 is located at the center of the correction cell as shown in FIG.
It is formed asymmetrically. Also, the concave portion 1 of the seal frame 13
Numeral 7 is disposed so as to be deviated to one of a region 16R in which a concave portion on the right side of the liquid crystal filling portion 16 is formed and a region 16L in which a concave portion on the left side is formed with the symmetry line 15 of the correction cell 10 as a boundary. This offset allows the front and back of the correction cell to be easily distinguished visually. In FIG. 2, the region R and the region L are formed by a continuous concave portion. However, the concave portion may not be continuous. The concave portion of the region 16R and the concave portion of the region 16L are formed asymmetrically, and the asymmetry is visually observed. If possible, the object of the present invention is obtained.

After the liquid crystal is injected from the injection port 14 into the space in the liquid crystal filling portion 16 which is the gap, the injection port 14 is sealed with a resin.

FIG. 3 shows a large substrate in which a plurality of cells, called multi-cavity, are formed on a large substrate, and then the large substrate is cut to obtain a single cell.
In a process before being divided into single correction cells 10, a large-sized multi-piece substrate is used. This large substrate 3
0 denotes an injection port 14 for injecting liquid crystal into a single correction cell 10.
One large substrate 31 and the other large substrate 32 in which a plurality of seal frames 13 each having
Are manufactured by a method of obtaining a single correction cell 10 by dividing a large-sized substrate 30 bonded with a thermosetting epoxy adhesive or the like with a gap provided therebetween.

As shown in FIG. 4, the second single correction cell 10-2 has a side 13 of the seal frame 13 in which the injection port 14 of the first single correction cell 10-1 is formed. A concave portion 17 is formed in a part of the side 13-1 facing -3. The concave portion 17 of the second single correction cell 10-2 is provided with the injection port 1 of the first single correction cell 10-1 disposed adjacently.
4 and extend to a position covering the same. Further, the concave portion 17 is formed at a predetermined distance from the corners P1 (FIG. 2) and P2 (FIG. 2), which are the corners of the seal frame 13.

From FIG. 4, S1 is the first correction cell 10-1.
Is the distance between the seal frame 13 and the dividing line X, and S2 is the second
S4 is the distance between the tip of the injection port 14 of the first correction cell 10-1 and the recess 17
Is the distance from the seal frame 13, and S 5 is the concave portion 17.
Is the distance between the seal frame 13 and the dividing line X. on the other hand,
S1 shown in FIG. 8 is the distance between the seal frame 113-3 of the first correction cell 110-1 and the dividing line X, and S2 is the second
Is the distance between the correction cell 110-2 of FIG.
Is the distance between the tip of the inlet 114 of the first correction cell 110-1 and the seal frame 113-1. When FIG. 4 of the embodiment of the present invention is compared with FIG. 8 of the prior art, the interval S4 is wider than the interval S3 having the concave portion. As described above, in the present invention, since the distance between the tip of the injection port 14 of the first correction cell 10-1 and the seal frame of the second correction cell 10-2 is increased, the first correction cell 10-1 The tip of the entrance 14 is made to protrude from the dividing line X, or a seal is printed.
The front end of the first injection port 14 and the seal frame 13-1 come into contact with each other, so that the injection port of the correction cell is sealed and the liquid crystal injection section is not broken. Therefore, as shown in FIG. 4, a single first correction cell 10-1 and a single second correction cell 10
-2 and the side 1 of the second single correction cell 10-2
The end of the recess 17 of 3-1 plays a role of air escape when the seal frame of the large-sized substrate 30 is pressed.

As described above, a plurality of electrodes and a plurality of seal frames 17 having an injection port 14 are formed on the large substrates 30 and 31 which are opposed to each other with a gap therebetween, corresponding to a single correction cell 10. Manufacturing of a liquid crystal device called multi-cavity, comprising a step of cutting the large substrate along a cutting line X, which is a cutting line, to expose the injection port 14 and then injecting liquid crystal and sealing the injection port. In the method, at least a first and a second liquid crystal device, that is, correction cells, are disposed adjacent to each other on the large substrate, and the first injection port 14 of the first correction cell 10-1 is provided at the first injection port 14 of the first correction cell 10-1. The upper side 13-1, which is the second side of the seal frame 17 of the second correction cell 10-2, is disposed to face, and the first inlet 14 is provided on the second side. A recess 17 is provided in a direction opposite to the first inlet so as to cover the first inlet. The concave portion 17 has a concave portion straddling the injection port 14 on the left and right sides, and the left and right concave portions are formed at positions asymmetric with respect to the injection port 14. Further, the first injection port 14
And the second side 13-1 is provided with the dividing line X, and the tip of the first injection port 14 is disposed in the vicinity of the concave portion of the second liquid crystal device beyond the dividing line X. Has been established.
The large-sized substrate having such a configuration is cut along the dividing line to expose the injection port 14, and then liquid crystal is injected, and the correction cell 10 is manufactured by a process of sealing the injection port 14. . By using such a manufacturing method, since the injection port 14 is positioned up to the single surface of the divided substrate,
The problem that the liquid crystal cannot sufficiently contact the injection port due to the single surface of the substrate during the injection process can be prevented, and unnecessary liquid crystal can be prevented from adhering to the single surface of the substrate can be improved, and productivity can be improved and resources can be effectively used.

In the above description of the embodiment, the correction cell and the driving cell are described separately. However, the present invention does not have to be implemented separately for the correction cell and the driving cell. For a liquid crystal cell for which the front and back need to be distinguished, the same effects as those of the present invention described below can be obtained.

[0030]

According to the present invention described above, the correction cell 10
Even if the injection port 14 of the liquid crystal filling portion 1 is disposed on the symmetry line 15 as the center line,
6 is deviated to a preset area of the areas 16R and 16L of FIG. 6, so that the front and back of the correction cell 10 can be easily visually discriminated.

Further, according to the present invention, since the injection port 14 is disposed on the symmetry line 15 which is the center line, the liquid crystal is uniformly diffused into the liquid crystal filling portion 16 from the injection port 14 and injected. Then, the liquid crystal has four corners P1, P2, P in the liquid crystal filling portion 16.
3, the liquid crystal filling portion 1 is almost uniformly diffused and filled in P4.
6 can be prevented, the display quality can be improved, and furthermore, no defective products are generated, the yield is improved, and the cost of the product is reduced.

According to the present invention, as shown in FIG.
Even if the predetermined gaps S0 and S are provided in the vicinity of the injection port 14 as before, the dimension of the recess 17 can be reduced by the step S2, and the yield (number of pieces) of the correction cells 10 manufactured from the large substrate 30 can be improved. Similarly, there is also an effect of reducing the cost of the product.

[Brief description of the drawings]

FIG. 1 is a schematic exploded perspective view of a liquid crystal display device according to the present invention.

FIG. 2 is a plan view showing a partially broken upper substrate of the correction cell of the liquid crystal display device according to the present invention.

FIG. 3 is a plan view showing a state in which a large substrate of a correction cell of the liquid crystal display device according to the present invention is partially broken.

FIG. 4 is an enlarged plan view of a part A in FIG. 3;

FIG. 5 is a schematic exploded perspective view of a conventional liquid crystal display device.

FIG. 6 is a plan view showing a state in which an upper substrate of a correction cell of a conventional liquid crystal display device is partially broken.

FIG. 7 is a plan view showing a state in which a large substrate of a correction cell of a conventional liquid crystal display device is partially broken.

FIG. 8 is an enlarged plan view of a part B in FIG. 7;

[Explanation of symbols]

 Reference Signs List 1 liquid crystal display device 10 correction cell 11 upper substrate 12 lower substrate 13 seal frame 13-1 upper side 13-3 lower side 13-2, 13-4 side 14 inlet 15 symmetry line 16 liquid crystal display filling portion 16R, 16L region 17 recess Reference Signs List 20 liquid crystal display panel 21 upper substrate 22 lower substrate 23 seal frame 24 IC chip 30 large substrate 31 one large substrate 32 the other large substrate P1, P2, P3, P4 corners S, S0, S1, S3 gap S2 step X minute Disconnection

Claims (7)

[Claims] 1. A gap for injecting and sealing liquid crystal is provided, at least two substrates are arranged to face each other, and a seal member having an inlet for injecting the liquid crystal is arranged around the gap. A liquid crystal device configured to seal liquid crystal with the seal member, wherein a concave portion is formed on a side of the seal member facing the injection port to determine whether the liquid crystal device is front or back. Liquid crystal device. 2. The method according to claim 1, wherein the concave portion has a concave portion on the left and right with respect to the inlet, and the left and right concave portions have a seal shape formed at a position asymmetric with respect to the inlet. 2. The liquid crystal device according to 1. 3. The liquid crystal device according to claim 2, wherein the left and right recesses have a seal shape formed by continuous recesses. 4. The liquid crystal device according to claim 1, wherein the inlet is formed on one side, and is disposed substantially at the center of the side. 5. The recess according to claim 1, wherein the width of the recess is wider than the depth of the recess, and the width of the recess is wider than the width of the injection port. Liquid crystal devices. 6. The liquid crystal device according to claim 1, wherein the concave portion is disposed so as to be deviated to one end of a side where the concave portion is disposed. 7. A large substrate in which at least an electrode and a seal member having an injection port are cut along a cutting line corresponding to at least the first and second liquid crystal devices adjacent to each other. In the obtained liquid crystal device, a first side provided on the sealing member of the second liquid crystal device is disposed so as to face a first injection port of the first liquid crystal device, and The side has a concave portion in a direction opposite to the first inlet so as to cover the first inlet, and the tip of the first inlet extends beyond the cutting line. A large-sized substrate having a configuration protruding toward the recess on the first side,
A liquid crystal device obtained by cutting along the cutting line such that the tip of the injection port remains between the first side and the recess.