JP2002318388A - Liquid crystal display panel and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal display panel into which a liquid crystal is injected in a short time without leaving air bubbles and without mechanically controlling start time of liquid crystal injection from a plurality of injection ports and a method for manufacturing the same. SOLUTION: In the liquid crystal display panel containing two sheets of electrode substrates placed opposite to each other and a liquid crystal layer comprising the liquid crystal injected into the space sandwiched by the electrode substrates and forming a display region, the liquid crystal display panel is provided with at least one exhaust hole 1 to exhaust air inside the space and a plurality of the injection ports 2, 3, 4 to inject the liquid crystal into the space on the outer circumferential part of the display region. The liquid crystal is simultaneously injected from the all injection ports by setting opening widths to be narrower toward the exhaust hole 1 from the injection port 2 to 3, 4 or by setting intervals between the neighboring injection ports to be wider toward the exhaust hole 1 along the outer circumference of the display region.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display panel in which liquid crystal is sealed in a space between two opposing electrode substrates, and a liquid crystal display panel in which liquid crystal is injected into the space by a vacuum injection method. About the method.

[0002]

2. Description of the Related Art Conventionally, liquid crystal display panels 2
When injecting a liquid crystal into a space serving as a liquid crystal layer sandwiched between a plurality of electrode substrates, the interval between the panels is usually very small, 5 μm or less, so that the injection time becomes long due to the pressure loss between the substrates and the liquid crystal alignment force. Therefore, as the injection of the liquid crystal proceeds, the injection permeation speed becomes slower, and there is a problem that it takes too much time to inject the liquid crystal particularly in a large panel.

[0003] In recent years, there is a panel structure in which a liquid crystal display panel has an exhaust port and a plurality of injection ports to reduce the injection time. There is a liquid crystal injection method in which liquid crystal is injected into the panel through an injection port formed at one end of the liquid crystal panel, while the liquid crystal is exhausted through an exhaust port formed at the end in addition to the liquid crystal panel.

FIG. 12 is a view for explaining a liquid crystal permeation state when a plurality of injection ports are simultaneously injected into a liquid crystal display panel having the same width. FIG. 12A is a diagram showing the liquid crystal permeation state immediately after the start of the injection, and FIG. 12B is a diagram showing the liquid crystal permeation state during the injection, and FIG.
FIG. 4 is a view showing a liquid crystal permeation state after the injection is completed. The liquid crystal 111 is injected into the space between the two electrode substrates constituting the panel 109 by the exhaust / injection switching connector 113 attached to the inlet 102, and the exhaust / injection switching connector 113 attached to the exhaust port 101. Air is exhausted from the space to promote the injection of the liquid crystal 111. When the liquid crystal 111 is injected simultaneously from all the injection ports 102,
The injection is completed in the liquid crystal permeation state shown in FIG. 12C from the liquid crystal permeation state shown in FIG. 12A through the liquid crystal permeation state shown in FIG. As the liquid crystal 111 permeates,
First, immediately after the start of the injection shown in FIG.
The unfilled space 115 of the liquid crystal 111 is formed at the corner of FIG.
Since the liquid crystal goes through the liquid crystal permeation state shown in FIG.
A non-injection space 115 is also formed at the center of the panel 109 as shown in FIG. Thus, the non-injected space 115 surrounded by the liquid crystal 111 is formed by the permeation state of the liquid crystal 111, and the uninjected space 115 remains as a bubble after the liquid crystal is injected.

In order to prevent a non-injection space from being formed in a liquid crystal panel having a plurality of injection ports as described above, for example, a liquid crystal injection method described in Japanese Patent Application Laid-Open No. 9-5761 is used. is necessary. In the publication, an intermediate injection port is formed at an intermediate portion between the exhaust port and the injection port, and after the liquid crystal injected from the injection port at one end of the liquid crystal panel passes through the intermediate injection port, the liquid crystal panel is inserted from the intermediate injection port. There is described an injection method in which liquid crystal is injected into the inside of the panel so that a space where liquid crystal is not injected is formed near a corner or a center of the panel.

FIG. 13 is a view for explaining a liquid crystal permeation state in a case where a plurality of injection ports are set to have the same width and the injection is performed by adjusting the injection timing from each injection port. FIG. 13A is a diagram showing a liquid crystal permeation state immediately after the start of injection, FIG. 13B is a diagram showing a liquid crystal permeation state during the injection, and FIG. It is a figure which shows a liquid crystal permeation state. That is, FIG.
In the liquid crystal display panel shown in FIG. 7, the liquid crystal 111 is connected to the exhaust / injection switching connector 113 attached to the injection port 102.
1 shows a liquid crystal display panel provided with an on-off valve 108 for adjusting the supply of liquid crystal, so that liquid crystal 111 is injected or not injected from each injection port 102 by opening and closing the on-off valve 108.

First, an exhaust / injection switching connector 113 attached to three injection ports 102a at one end of a liquid crystal panel.
The on / off valve 108 of the liquid crystal supply pipe connected to the panel is opened, and supply of liquid crystal into the panel 109 is started. Then, Panel 1
Immediately after the liquid crystal 111 has permeated into 09 and passed through the two injection ports 102b, which are intermediate injection ports, the on-off valve 108 connected to the exhaust / injection switching connector 113 attached to the injection port 102b is set in FIG. ) And the liquid crystal 111 is further injected. Then, immediately after the liquid crystal 111 has passed through the injection port 102c, which is another intermediate injection port, the on-off valve 108 connected to the injection port 102c is set to the position shown in FIG.
The liquid crystal 111 is further opened and injected as shown in FIG. Finally, immediately after the liquid crystal 111 has passed through the inlet 102d, which is another intermediate inlet, the on-off valve 108 connected to the inlet 102d is opened as shown in FIG.
The liquid crystal 111 is further injected.

By shifting the opening timing of the on-off valve 108 connected to each injection port 102 in this manner, the panel 1
Since it is possible to adjust the permeation state of the liquid crystal 111 injected into the liquid crystal panel 09, it is possible to prevent bubbles from being generated in the liquid crystal panel as described above.

[0009]

As described above, in the liquid crystal display panel having a plurality of injection ports, in order to inject the liquid crystal so as not to generate bubbles, the injection of the liquid crystal from the intermediate injection port is controlled. It is necessary to mechanically control the timing of starting the injection from each injection port by using an on-off valve connected to each injection port.

An object of the present invention is to provide a liquid crystal display panel in which liquid crystal is injected in a short time and no bubbles remain without mechanically controlling the timing of starting liquid crystal injection from a plurality of injection ports, and a method of manufacturing the same. That is.

[0011]

The present invention provides a liquid crystal display panel including two opposing electrode substrates and a liquid crystal layer in which liquid crystal is injected into a space between the electrode substrates to form a display area. A peripheral portion of the display area, at least one exhaust port for exhausting the space, and a plurality of liquid crystal injection ports for injecting liquid crystal into the space; The liquid crystal display panel is characterized in that the opening width is set narrower toward the entrance.

According to the present invention, at least one exhaust port and inlets are provided at at least one location in the outer peripheral portion of the display area, and the opening width is narrower as the inlet is closer to the exhaust port. In addition, the amount of liquid crystal injected from the injection port into the space serving as the liquid crystal layer can be controlled to be smaller as the injection port is closer to the exhaust port. As a result, the liquid crystal can be injected from a plurality of injection ports, thereby shortening the liquid crystal injection time, and preventing the panel from having a liquid crystal non-injection space therein without using a complicated mechanism as a device. It is possible to provide a liquid crystal display panel in which the liquid crystal permeation state in the panel is controlled so that no air bubbles remain due to the liquid crystal non-injected portion in the panel.

The present invention also provides a liquid crystal display panel including two opposing electrode substrates and a liquid crystal layer in which a liquid crystal is injected into a space between the electrode substrates to form a display area. The outer peripheral portion of the region has at least one exhaust port for exhausting the space, and a plurality of liquid crystal injection ports for injecting liquid crystal into the space. The liquid crystal display panel is characterized in that the distance between adjacent liquid crystal injection ports is set wider as the distance is shorter.

According to the present invention, at least one exhaust port and an inlet having the same opening width are provided at at least one position on the outer peripheral portion of the display area. By designing the space between the inlet and the inlet to be wider, the amount of liquid crystal that penetrates into the panel is
The smaller the area in the panel, the closer the gap between the inlets adjacent to the exhaust port is, the smaller the control can be made. by this,
Injection of liquid crystal from multiple injection ports not only shortens the liquid crystal injection time, but also prevents the liquid crystal uninjected space from being generated in the panel. By controlling the liquid crystal permeation state, it is possible to provide a liquid crystal display panel in which no air bubbles remain due to a portion where liquid crystal has not been injected in the panel.

According to the present invention, there is provided a method of manufacturing a liquid crystal display panel according to claim 1 or 2, wherein an exhaust connector is attached to the exhaust port, and a liquid crystal inject connector is attached to a plurality of liquid crystal inlets, and exhaust is performed. A method for manufacturing a liquid crystal display panel, characterized by injecting liquid crystal.

According to the present invention, in the liquid crystal display panel, the liquid crystal is injected from the plurality of injection ports by the connector connection method together with the exhaust from the exhaust port. In addition to shortening the liquid crystal display, the liquid crystal permeation state in the panel is controlled so that no unfilled space of liquid crystal is generated in the panel even when the injection is started at the same time, and the liquid crystal display with no bubbles remaining in the panel Panels can be manufactured.

According to the present invention, there is provided a method for manufacturing a liquid crystal display panel according to claim 1 or 2, wherein the plurality of liquid crystal injection ports are immersed in the liquid crystal, and the liquid crystal is injected by exhausting from the exhaust port. This is a method for manufacturing a liquid crystal display panel characterized by the following.

According to the present invention, in the liquid crystal display panel, the liquid crystal is injected from the plurality of injection ports by the dip method together with the exhaust from the exhaust port. Not only can the length be reduced, but also the liquid crystal display panel in which the air bubbles remain in the panel can be manufactured by controlling the liquid crystal permeation state in the panel.

According to the present invention, there is provided a method of manufacturing a liquid crystal display panel according to claim 1 or 2, wherein when exhausting the liquid crystal from the exhaust port and injecting the liquid crystal, the liquid crystal is dropped and supplied to the liquid crystal injection port. A method for manufacturing a liquid crystal display panel.

According to the present invention, in the liquid crystal display panel, the liquid crystal is injected from the plurality of injection ports by the liquid crystal drop supply method together with the exhaust from the exhaust port. Not only the time can be shortened, but also the liquid crystal permeation state in the panel can be controlled even when the injection is started at the same time, so that a liquid crystal display panel having no air bubbles remaining in the panel can be manufactured.

[0021]

Hereinafter, a liquid crystal display panel according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a plan view showing an example of the configuration of the liquid crystal display panel according to the first embodiment of the present invention. The liquid crystal display panel is characterized by having an inlet pattern in which the opening width is narrowed toward the inlets 2, 3, and 4 including the intermediate inlet near the exhaust port 1. The liquid crystal display panel is configured such that two rectangular glass substrates on which electrodes are formed are adhered to each other with a sealing agent surrounding the periphery thereof at a predetermined gap. When the liquid crystal is injected into the space in the panel 9 formed by the gap surrounded by the sealant, it becomes the display area of the liquid crystal display panel. The sealant surrounding the periphery of the liquid crystal display panel is not drawn around the periphery of the liquid crystal display panel, and the inlets 2, 3, and 4 for injecting liquid crystal and the outlet 1 for exhausting air in the space in the panel 9 are provided. Are formed.

The liquid crystal display panel has, for example, a long side 360
In a rectangular panel 9 of mm × short side 275 mm, an exhaust port 1 is provided near the center of one long side, and injection ports 2 are provided at a plurality of locations on the other long side at substantially equal intervals. The exhaust port 1 and the plurality of injection ports 2 provided on these long sides are all set to the same opening width, for example, 15 mm. When four injection ports 2 are provided, the injection ports 2 are, for example, separated by 30 mm from the panel corners at both ends, and the injection ports 2 are provided at equal intervals. On both short sides, intermediate injection ports 3 and 4 are provided at two positions that divide each short side into three equal parts. The intermediate inlet 4 near the outlet is provided with a smaller opening width than the intermediate inlet 3 far from the outlet 1, and the intermediate inlet 3 is narrower than the inlet 2 farther from the outlet 1. I have. For example, from the long side where the injection port 2 is provided, an intermediate injection port 3 having an opening width of 5 mm is provided at a 1/3 position and an intermediate injection port 4 having an opening width of 3 mm is provided at a 2/3 position.
Is provided. The installation locations of the intermediate injection ports 3 and 4 can be set based on the following Table 1, which shows the relationship between the opening width and the amount of liquid crystal permeated for each injection time. The permeation amount in Table 1 is
Shown as a linear distance (mm) from the inlet.

[0024]

[Table 1]

Next, a method of manufacturing the liquid crystal display panel shown in FIG. 1 will be described. First, a liquid crystal driving electrode and the like are formed on a glass substrate. In order to determine the cell thickness of the panel 9 on the glass substrate on which the electrodes are formed, spacers made of, for example, 5 μm plastic beads are sprayed. Next, an electrode and the like are formed also on a glass substrate to be another color filter. On the glass substrate, a sealant made of, for example, an epoxy resin is drawn on an outer peripheral portion of a portion to be a display region of the liquid crystal display panel so as to surround the portion to be a display region. A portion serving as an inlet 2 for injecting liquid crystal and a portion serving as an outlet 1 for exhausting air in the panel 9 are formed by the seal pattern when drawing the sealant. Next, the glass substrate on which the spacers are scattered and the substrate on which the sealant is drawn are bonded together with a gap provided by the spacers, thereby forming a liquid crystal display panel before liquid crystal injection.

Next, liquid crystal is injected into the liquid crystal display panel by a connector connection injection method. The method of injecting liquid crystal will be described with reference to FIGS. 2 and 3 based on an example in which liquid crystal is injected into a liquid crystal display panel having the above-described size. This embodiment is referred to as a first embodiment.

FIG. 2 is a plan view showing a liquid crystal permeation state in the liquid crystal display panel of FIG. 1 at a lapse of 16 minutes after the start of injection. FIG. 3 is a plan view showing a liquid crystal permeation state in the liquid crystal display panel of FIG. 1 at a lapse of 30 minutes after the start of injection.

First, in the exemplified liquid crystal display panel having a long side of 360 mm and a short side of 275 mm without liquid crystal, an exhaust connector 7 for exhausting air in the panel 9 is attached to the exhaust port 1, and the four injection ports 2 and 4 are provided. Three middle inlets 3, 4
Was equipped with an injection connector 8 for supplying the liquid crystal 11.
Next, the air in the panel 9 is discharged from the exhaust connector 7 by 1 Pa.
And the injection of the liquid crystal 11 was started from all the injection connectors 8 in the panel 9. After 16 minutes from the start of the injection, the liquid crystal permeates as shown in FIG.
The liquid crystal 11 penetrating from the intermediate injection port 3 having an opening width of 3 mm is in contact with the liquid crystal 11 penetrating from the intermediate injection port 3 having a width of 3 mm.
Had not yet contacted. No unfilled space was generated at the panel corner. 30 minutes after the start of injection
At the elapse of the minute, the liquid crystal enters a state shown in FIG. 3, and the liquid crystal 11 injected from the injection port 2 and the intermediate injection port 3 penetrates to about half of the panel 9 from the long side where the injection port 2 is provided. It came into contact with the liquid crystal 11 penetrating from the intermediate injection port 4 having an opening width of 3 mm. Further, the liquid crystal injection was completed in about 75 minutes from the start of the injection, no non-injection space was generated at the center of the panel 9 from the exhaust port 1, and no air bubbles remained in the panel 9.

As described above, it was confirmed that the injection amount of the liquid crystal 11 can be controlled by narrowing the opening width of the injection port 2 or the intermediate injection ports 3 and 4 closer to the exhaust port 1.

As Comparative Example 1, the same long side 36 as in Example 1 was used.
In a panel of 0 mm × short side 275 mm, an exhaust port was provided on one long side and an inlet was provided on the other long side as in Example 1, and a liquid crystal display panel not provided with an intermediate inlet on the short side was manufactured. Liquid crystal was injected into the liquid crystal display panel in the same manner as in Example 1. That is, exhaust was performed at 1 Pa from the exhaust connector attached to the exhaust port, injection connectors were attached to four injection ports having an opening width of 15 mm, and liquid crystal injection was started simultaneously from all these injection connectors. The liquid crystal permeated up to 1/3 of the panel from the long side provided with the injection port in about 20 minutes, penetrated to 2/3 in about 60 minutes, and the liquid crystal injection was completed in about 110 minutes.

In Example 1, not only the liquid crystal injection time was reduced by 32% than in Comparative Example 1, but no air bubbles remained in the panel. Regarding the shortening of the injection time, it is not simply shortened by the liquid crystal injected from the intermediate injection port,
Since the boundary surface where the liquid crystal non-injection portion in the panel and the liquid crystal from the intermediate injection port contact each other is drawn in an arc, the permeation area is smaller than in the case where the permeation proceeds only linearly as in Comparative Example 1. It is thought that penetration has been promoted by being widely available. That is, the liquid crystal from the intermediate injection port does not come into contact with the liquid crystal from the adjacent injection port immediately after the start of injection, unlike the liquid crystal from the injection port, and the penetration of the liquid crystal is promoted for each intermediate injection port. It is considered that the effect of having a plurality of inlets has appeared.

FIG. 4 is a plan view showing the configuration of another example of the liquid crystal display panel according to the first embodiment of the present invention. The liquid crystal display panel is different from the liquid crystal display panel of the example of the first embodiment shown in FIG. Are formed adjacent to each other to form an inlet or an intermediate inlet, and the inlet or intermediate inlet closer to the exhaust port has a pattern of inlets in which the number of adjacent inlets is reduced. Therefore, the configuration other than the injection port and the intermediate injection port is the same as that of the liquid crystal display panel of the first embodiment, and the description of the configuration is omitted.

In the liquid crystal display panel, an inlet 12 is provided adjacent to three inlets 10 having an opening width of 5 mm, for example, at a position corresponding to the inlet 2 in FIG.
The intermediate inlet 13 is provided adjacent to two inlets 10 having an opening width of 5 mm at a position corresponding to the above, and one inlet 10 having an opening width of 5 mm is provided at a position corresponding to the intermediate inlet 4 in FIG. Only the intermediate injection port 14 is provided.

Therefore, the method of manufacturing the liquid crystal display panel shown in FIG. 4 is the same as the method of manufacturing the liquid crystal display panel of the first embodiment described above. That is, the liquid crystal injection is started simultaneously from each of the injection port portions 12 and the intermediate injection port portions 13 and 14, so that the liquid crystal injection can be completed in a short time similarly to the liquid crystal display panel of the example of the first embodiment. No air bubbles remain in the panel 19.

As described above, the injection amount of the liquid crystal can be controlled by reducing the number of the injection ports in the injection port 2 or the intermediate injection ports 3 and 4 as being closer to the exhaust port.

FIG. 5 is a plan view showing the structure of the liquid crystal display panel according to the second embodiment of the present invention. The liquid crystal display panel has an inlet pattern in which the distance between the inlets is increased as the distance to the exhaust port along the outer periphery of the display area becomes shorter. In the liquid crystal display panel, similarly to the liquid crystal display panel according to the first embodiment, two rectangular glass substrates on which electrodes are formed are adhered with a sealant surrounding a periphery of a display region while keeping a predetermined gap. .

As in the first embodiment, the liquid crystal display panel has a rectangular panel 29 having an exhaust port 1 near the center of one long side and an inlet 22 at a plurality of other long sides. , Intermediate injection ports 23, 24 at a plurality of locations on both short sides.
Are provided. Unlike the first embodiment, not only the exhaust port 1 and the injection port 22 but also the intermediate injection ports 23 and 24 are set to have the same opening width. Further, the inlet 22 and the intermediate inlets 23 and 24 are formed along the outer periphery of the display area from the center of the long side farthest from the exhaust port 1 to the panel corner at the end of the long side and the other of the panel corner to the short side. At the end, the spacing between the inlets located there is set to be progressively wider. That is, the distance between the injection ports 22 located at the center of the long side is defined as a, and the distance is sequentially set to b from the center to the other end of the short side through the panel corner at the end of the long side. , C, d, a <b <c <d
Set so that For example, in the case of the rectangular panel 29 having a long side of 360 mm and a short side of 275 mm as in Example 1 of the first embodiment, the distance a between the inlets 22 located at the center of the long side is 60 mm, and the distance a between the inlets is 60 mm. Is set to 75 mm between the injection ports 22. Further, the interval c between the adjacent inlet 22 and the intermediate inlet 23, that is, the interval c that is the sum of the distance from the inlet 22 to the panel corner and the distance from the panel corner to the intermediate inlet 23 is 85 mm, The distance d between the adjacent intermediate injection port 23 and the intermediate injection port is set to 90 mm.

The method for manufacturing the liquid crystal display panel according to the second embodiment is the same as the method for manufacturing the liquid crystal display panel according to the first embodiment. That is, a liquid crystal display panel before liquid crystal injection is formed in exactly the same manner as in the first embodiment except that a portion where a sealant is drawn is different. The method of forming a liquid crystal display panel by injecting liquid crystal into the liquid crystal display panel is also the same as that of the first embodiment. However, since the liquid crystal permeation state in the liquid crystal display panel is slightly different, the liquid crystal display panel having the above-mentioned size is used. A description will be given with reference to FIGS. 6 and 7 based on an example in which liquid crystal is injected. This embodiment is a second embodiment.

FIG. 6 is a plan view showing the state of liquid crystal penetration in the liquid crystal display panel of FIG. FIG. 7 is a plan view showing a liquid crystal permeation state in the liquid crystal display panel of FIG. 1 at a lapse of 30 minutes after the start of injection.

As in Example 1 of the first embodiment, in the above-described liquid crystal display panel having a long side of 360 mm × short side of 275 mm without liquid crystal, the exhaust connector 7 is attached to the exhaust port 1, and the injection port 22 and the intermediate injection port are connected. The injection connectors 8 were attached to the inlets 23 and 24, and the air was exhausted at 1 Pa from the exhaust connector 7 and the injection of the liquid crystal 11 was started from all the injection connectors 8 in the panel 29. At the elapse of 7 minutes after the start of the injection, the liquid crystal was in a permeated state shown in FIG. 6, and the liquid crystal 11 permeating from the intermediate injection port 23 and the liquid crystal 11 permeating from the four injection ports 22 on the long side were in contact. No unfilled space was generated at the panel corner. Further, at the lapse of 30 minutes after the start of the injection, the liquid crystal permeated state shown in FIG.
2 and the liquid crystal 11 injected from the intermediate injection port 23 penetrated to about half of the inside of the panel 29 from the long side where the injection port 22 was provided, and came into contact with the liquid crystal 11 penetrated from the intermediate injection port 24. Further, the liquid crystal injection was completed in about 73 minutes from the start of the injection, and no uninjected space was generated in the center of the panel 29 from the exhaust port 1, and no air bubbles remained in the panel 29.

As described above, the exhaust port 1 along the outer periphery of the display area
As the distance to the inlet is shorter, the gap between the inlets is made wider, so that the injection time is shortened and bubbles are formed in the panel as in Example 1 of the first embodiment in which the opening width of the inlet is narrowed. It has been confirmed that the injection amount of the liquid crystal 11 can be controlled so as not to leave any.

FIG. 8 is a plan view showing the structure of the liquid crystal display panel according to the third embodiment of the present invention. As in the liquid crystal display panel according to the first embodiment, the liquid crystal display panel has a pattern of an injection port in which an opening width is narrower as an injection port is closer to an exhaust port. Also, the liquid crystal display panel according to the first embodiment has an injection hole pattern suitable for liquid crystal injection by a connector connection injection method, whereas the liquid crystal display panel according to the third embodiment is suitable for a liquid crystal injection by a dip method. It is an entrance pattern. In the liquid crystal display panel according to the third embodiment, like the liquid crystal display panel according to the first embodiment, a sealant surrounding the periphery of the display region is formed by keeping two rectangular glass substrates on which electrodes are formed at a predetermined interval. Are pasted together.

The liquid crystal display panel according to the third embodiment is, for example, a rectangular panel 39 having a long side of 360 mm × short side 275 mm of the same size as the liquid crystal display panel of the first embodiment, and one end of one short side. Exhaust port 31 nearby
In addition, at a plurality of locations on the long side that is in contact with the other end of the short side where the exhaust port 31 is provided, there are provided the inlets 32 whose opening width is narrower as being closer to the exhaust port 31. That is, the opening widths e, f, g, h, and i are set in order from the side closer to the exhaust port 1 on the long side.
And j, it is set so that e <f <g <h <i <j. For example, the exhaust port 31 has an opening width of 15 mm.
The number of the inlets 32 is six, and the opening widths of the inlets 32 are set to 5, 6, 8, 11, 15 and 20 mm in order from the side closer to the outlet 31. Further, the distance k from the panel corner near the exhaust port 31 to the nearest inlet 32 on the long side where the inlet 32 is provided is 40 mm, and the inlet 32
Is set to 45 mm at all five locations.

Next, the method for fabricating the liquid crystal display panel according to the present embodiment will be explained. A liquid crystal injection method will be described with reference to FIG. 9 based on an embodiment in which liquid crystal is injected into a liquid crystal display panel having the above-described size. This embodiment is a third embodiment.

FIG. 9 is a plan view showing a liquid crystal permeation state in the liquid crystal display panel of FIG. 8 during injection by the dip method, and the liquid crystal dish 30 is shown in cross section.

The liquid crystal display panel before liquid crystal injection is formed in the same manner as the liquid crystal display panel according to the first embodiment, except that the sealant is drawn in accordance with the pattern of the injection port of the third embodiment. Next, a liquid crystal dish 30 that fills the liquid crystal 11 is prepared. The formed liquid crystal display panel is placed in the liquid crystal dish 30 such that the long side of the liquid crystal panel where the injection port 32 is provided is slightly immersed (dipped) in the liquid crystal 11. Then
An exhaust connector 7 is connected to the exhaust port 1, and the panel 3 is set at 1 Pa.
The liquid in the liquid crystal 11 was started to be injected from the injection port 32 by evacuating the air in 9. During the injection, the liquid crystal shown in FIG.
1 penetrated more from closer to exhaust vent 31 and further away. That is, a larger amount of liquid crystal was injected from the injection port 32 closer to the exhaust port 31 and having a narrower opening width, and from the injection port 32 farther from the exhaust port 31 and having a wider opening width. The injection was completed in about 95 minutes from the start of the injection, no uninjected space was generated in the panel 39, and no residual air bubbles were generated.

As described above, in the pattern of the injection port suitable for the liquid crystal injection method using the dip method, the injection port closer to the exhaust port has a narrower opening width. It was confirmed that the injection amount of the liquid crystal 11 could be controlled so as not to leave air bubbles in the panel.

The same effect can be obtained by providing the pattern of the injection port of the liquid crystal display panel shown in FIG. 5 as the second embodiment so as to be suitable for the dip type liquid crystal injection method. That is, similarly to the liquid crystal display panel according to the third embodiment shown in FIG. 8, an exhaust port is provided near one end of one short side of a rectangular liquid crystal display panel, and a plurality of long sides in contact with the other end of the short side are provided. An injection port is provided at each location. However, the opening widths of the inlets are all the same, and instead, the distance between the inlets is increased as the distance from the outlet increases. With such a configuration, the injection amount is small where the interval is wide, and the injection amount is large where the interval is small. Therefore, the same liquid crystal permeation state as the liquid crystal display panel according to the third embodiment can be obtained. Therefore, even when injecting liquid crystal by the dipping method into a liquid crystal display panel in which the distance between the inlets is set wider as being closer to the exhaust port, bubbles are not left in the panel while shortening the injection time. Thus, the injection amount of the liquid crystal can be controlled.

FIG. 10 is a plan view showing the structure of the liquid crystal display panel according to the fourth embodiment of the present invention. As in the liquid crystal display panel according to the first embodiment, the liquid crystal display panel has a pattern of an injection port in which an opening width is narrower as an injection port is closer to an exhaust port. However, the liquid crystal display panel according to the first embodiment has a configuration suitable for liquid crystal injection by a connector connection method, whereas the liquid crystal display panel according to the fourth embodiment has a liquid crystal drop supply for injecting liquid crystal dropped into an injection port. The configuration is suitable for the system. In particular,
On the side of the liquid crystal display panel where the injection port is provided, the liquid crystal driving substrate 45 is set wider than the other color filter substrate 46, and a dropping area 48 for dropping the liquid crystal 11 from the dispenser 47 is secured. For example, the long side is 360 mm and the short side is 275 m which is the same size as the liquid crystal display panel according to the first embodiment.
In the rectangular panel 49 of m, the inlet 4 is similar to the inlet 2, the intermediate inlets 3, 4 of the first embodiment shown in FIG.
At three sides where 2, 43 and 44 are provided, the liquid crystal driving substrate 45 is made 5 mm wider than the color filter substrate 46.
Except that the liquid crystal driving substrate 45 is set wider than the color filter 46, it is completely the same as the liquid crystal display panel according to the first embodiment, and the description of the other components is omitted.

Next, the method for fabricating the liquid crystal display panel according to the present embodiment will be explained. The liquid crystal injection method will be described with reference to FIG. 11 based on an example in which liquid crystal is injected into a liquid crystal display panel having the above-described size. This embodiment is a fourth embodiment.

FIG. 11 is a plan view showing a liquid crystal infiltration state during injection in the liquid crystal display panel of FIG. 10 by the liquid crystal drop supply method.

The liquid crystal display panel according to the first embodiment is the same as the liquid crystal display panel according to the first embodiment except that the substrates are bonded such that the liquid crystal driving substrate 45 is 5 mm wider than the color filter substrate 46 on the side where the injection ports 42, 43, and 44 are provided. Thus, a liquid crystal display panel before liquid crystal injection is formed. Next, the formed liquid crystal display panel is fixed horizontally, and the liquid crystal
A dispenser 47 for dropping 1 is installed. Next, the liquid crystal 11 is dropped from the dispenser 47 into the dropping area 48 on the liquid crystal driving substrate 45 corresponding to all the injection ports 42, 43, and 44, and the exhaust connector 7 is connected to the exhaust port 1, and the panel is set at 1 Pa. The liquid in the liquid crystal 11 was started to be injected from all the injection ports 42, 43, and 44 by exhausting the air in 49. Shortly after injection, FIG.
And the liquid crystal 11 penetrates through the injection ports 42, 43, and 44 as in Example 1 of the first embodiment.
It was regulated according to the width of the inlets 42, 43, 44.
That is, the penetration of the liquid crystal injected from the inlet 42 having an opening width of 15 mm was the highest, the penetration from the inlet 43 having an opening width of 5 mm was medium, and the penetration from the inlet 44 having an opening width of 3 mm was the lowest. Thereafter, the liquid crystal 11 penetrates into the panel 49 similarly to the permeation state of the first embodiment shown in FIGS. 2 and 3, and the injection is completed in about 70 minutes. I never did.

As described above, by making the opening width narrower as the injection port is closer to the exhaust port, the liquid crystal injection method of the liquid crystal drop supply method also has the same panel structure as that of the first embodiment in which the liquid crystal is injected by the connector connection injection method. Similarly,
It was confirmed that the injection amount of the liquid crystal 11 can be controlled so that the injection time is shortened and air bubbles are not left in the panel.

It should be noted that, instead of the injection port pattern shown in FIG. 10, the injection port pattern of the liquid crystal display panel shown in FIG. 5 may be employed as the second embodiment. In other words, the opening widths of the injection ports are all the same, and an injection port pattern in which the distance between the injection ports is increased as the distance to the exhaust port along the outer periphery of the display area becomes shorter, and the liquid crystal driving substrate is formed of the other color. Set wider than the filter substrate. With such a configuration, even in the liquid crystal injection method of the liquid crystal drop supply method, the liquid crystal permeation state can be made similar to that of the liquid crystal display panel according to the second embodiment, and the injection time can be shortened as in the second embodiment. In addition, the injection amount of liquid crystal can be controlled so as not to leave air bubbles in the panel.

[0055]

As described above, according to the present invention, at least one exhaust port and inlets are provided at a plurality of locations on the outer peripheral portion of the display area, and the opening closer to the exhaust port has a smaller opening width. In this manner, the liquid crystal is injected from a plurality of injection ports to reduce the liquid crystal injection time by designing such that the distance between the adjacent injection ports becomes larger as the distance to the exhaust port along the outer periphery of the display area becomes shorter. It is possible to provide a liquid crystal display panel which can not only reduce the time but also control the liquid crystal permeation state in the panel without using a complicated control mechanism and which does not generate bubbles due to no liquid crystal injection.

Further, according to the present invention, the liquid crystal display panel having the above-described injection port structure can inject liquid crystal by any of the liquid crystal injection methods of the connector connection method, the dip method, and the liquid crystal drop supply method. No bubbles are generated while shortening the injection time.

[Brief description of the drawings]

FIG. 1 is a plan view showing a configuration of an example of a liquid crystal display panel according to a first embodiment of the present invention.

FIG. 2 shows a state after the start of injection in the liquid crystal display panel of FIG.
It is a top view which shows the liquid crystal permeation state at the time of minute passage.

FIG. 3 shows a state 30 after the start of injection in the liquid crystal display panel of FIG.
It is a top view which shows the liquid crystal permeation state at the time of minute passage.

FIG. 4 is a plan view showing a configuration of another example of the liquid crystal display panel according to the first embodiment of the present invention.

FIG. 5 is a plan view illustrating a configuration of a liquid crystal display panel according to a second embodiment of the present invention.

FIG. 6 is a plan view showing a liquid crystal permeation state in the liquid crystal display panel of FIG. 5 after a lapse of 7 minutes from the start of injection.

FIG. 7 shows a state 30 after the start of injection in the liquid crystal display panel of FIG.
It is a top view which shows the liquid crystal permeation state at the time of minute passage.

FIG. 8 is a plan view illustrating a configuration of a liquid crystal display panel according to a third embodiment of the present invention.

9 is a plan view showing a liquid crystal infiltration state during injection in a dip method in the liquid crystal display panel of FIG. 8;

FIG. 10 is a plan view illustrating a configuration of a liquid crystal display panel according to a fourth embodiment of the present invention.

11 is a plan view showing a liquid crystal permeation state during injection in the liquid crystal display panel of FIG. 10 by a liquid crystal drop supply method.

FIG. 12 is a view for explaining a liquid crystal permeation state when a plurality of injection ports are simultaneously injected into a liquid crystal display panel having the same width.

FIG. 13 is a diagram for explaining a liquid crystal permeation state in a case where the liquid crystal display panel in which a plurality of injection ports are set to have the same width and the injection is performed by adjusting the injection timing from each injection port.

[Explanation of symbols]

 1, 31, 101 Exhaust port 2, 10, 22, 32, 42, 102 Inlet 3, 4, 23, 24, 43, 44 Intermediate inlet 7 Exhaust connector 8 Injection connector 9, 19, 29, 39, 49, 109 Panel 11, 111 Liquid crystal 12 Dispenser 13, 14 Intermediate injection port 30 Liquid crystal dish 47 Dispenser 48 Dropping area 113 Exhaust / injection switching connector 115 Non-injection space

Claims (5)

[Claims] 1. A liquid crystal display panel comprising: two opposing electrode substrates; and a liquid crystal layer in which a liquid crystal is injected into a space between the electrode substrates to form a display region, wherein an outer peripheral portion of the display region is provided. And a plurality of liquid crystal inlets for injecting liquid crystal into the space, and a liquid crystal inlet closer to the outlet has a narrower opening width. A liquid crystal display panel characterized by being set. 2. A liquid crystal display panel comprising: two opposing electrode substrates; and a liquid crystal layer in which a liquid crystal is injected into a space between the electrode substrates to form a display region. The unit has at least one exhaust port for exhausting the space and a plurality of liquid crystal injection ports for injecting liquid crystal into the space, and the distance to the exhaust port along the outer periphery of the display area is short. A liquid crystal display panel wherein the distance between adjacent liquid crystal injection ports is set wider. 3. The method for manufacturing a liquid crystal display panel according to claim 1, wherein an exhaust connector is attached to the exhaust port, a liquid crystal injection connector is attached to a plurality of liquid crystal injection ports, and the liquid crystal is injected while exhausting. A method of manufacturing a liquid crystal display panel. 4. The method for manufacturing a liquid crystal display panel according to claim 1, wherein the plurality of liquid crystal injection ports are immersed in liquid crystal, and exhausted from an exhaust port to inject the liquid crystal. A method for manufacturing a liquid crystal display panel. 5. The method for manufacturing a liquid crystal display panel according to claim 1, wherein the liquid crystal is dropped and supplied to the liquid crystal injection port when exhausting the liquid crystal from the exhaust port and injecting the liquid crystal. Characteristic liquid crystal display panel manufacturing method.