JP2013222019A - Liquid crystal panel and liquid crystal display device having the same - Google Patents

Abstract

Disclosed is a liquid crystal panel with high image display quality and a liquid crystal display device having the same, in which a gap between a pair of substrates of a liquid crystal panel is not uniform and impurities are not mixed into a liquid crystal material sealed between the substrates. To do.
A liquid crystal panel is a liquid crystal panel in which liquid crystal is sandwiched between a pair of substrates, an image display area for displaying an image, and a first closed area that surrounds at least the image display area. And bonding the pair of substrates together, the sealing material 5a sandwiching the liquid crystal in the first closed region 12a and the sealing material 5a in the region adjacent to the outside of the first closed region 12a The second closed region 12b is formed, and the auxiliary sealing material 5b that holds the liquid crystal in the second closed region 12b is provided by bonding the pair of substrates.
[Selection] Figure 1

Description

  The present invention relates to a liquid crystal panel and a liquid crystal display device having the same, and more particularly to a liquid crystal panel that sandwiches liquid crystal between a pair of substrates suitable for performing liquid crystal injection by a dropping injection method and a liquid crystal display device having the liquid crystal panel.

  A liquid crystal display device displays characters and images by applying a voltage to liquid crystal held between a pair of substrates of a liquid crystal panel. A liquid crystal display device is used as a display device in many applications because it has a thin and lightweight casing and low power consumption. As a method for enclosing and holding liquid crystal between a pair of substrates, for example, there are a vacuum injection method and a vacuum drop injection method.

  In the injection method using the vacuum injection method, first, a sealing material is arranged on one side of a pair of substrates so as to surround an image display region of a liquid crystal panel, and a cutout is provided in a part of the sealing material. In addition, a spacer for keeping the distance between the substrates constant is also arranged. A gap is formed between the pair of substrates by attaching the substrate on which the sealing material and the spacer are arranged to the other substrate. Next, the liquid crystal panel is placed in a vacuum container to create a vacuum between the pair of substrates, and the liquid crystal panel is returned to atmospheric pressure with the cutout portion of the sealing material immersed in a liquid crystal material. Liquid crystal is injected into the gap between the pair of substrates due to the pressure difference between the inside and outside. Thereafter, the notched portion of the sealing material is sealed to obtain a liquid crystal panel.

  On the other hand, in the injection method by the dropping injection method, a sealing material is arranged on the outer peripheral portion of one substrate, a closed loop, that is, a closed region is formed by the sealing material, and a liquid crystal material is dropped inside the closed region. Next, the liquid crystal panel is assembled by bonding the substrate on which the liquid crystal material is dropped under pressure reduction to the other substrate. In order to keep the distance between the pair of substrates constant, a spherical spacer or a columnar spacer formed by photolithography on one substrate is disposed between the substrates.

  The liquid crystal panel assembled by the dropping injection method is opened to the atmosphere after assembly. At this time, the liquid crystal dropped to the closed region spreads between the substrates due to the atmospheric pressure applied to the surface of the liquid crystal panel, and the distance between the pair of substrates is increased. Is crushed to an interval defined by the height of the spacer disposed between the substrates. Further, the sealing material disposed on the outer peripheral portion of the panel is crushed following the gap between the substrates, so that a state in which the liquid crystal is sandwiched between the pair of substrates is obtained. Next, a liquid crystal panel in which liquid crystal is sealed is obtained by irradiating the sealing material with ultraviolet rays or the like to cure the sealing material.

  The distance between the pair of substrates of the liquid crystal panel is controlled by the height of spherical or columnar spacers arranged in the image display area. However, since the height of the ground on which the spacer is arranged is different in the display area and the area other than the display area, when a spacer having the same height is arranged in these two areas, the area other than the display area and the display area However, since the height of the upper portion of the spacer is different, for example, when the amount of liquid crystal dripping is insufficient, there is a problem that unevenness is likely to occur between the substrates.

  For example, when a color material (also referred to as a color filter) is arranged in an image display area on one substrate and color display is performed, the color material is provided in an area other than the image display area based on the substrate interval of the image display area. Is not arranged, the substrate interval is increased in the region other than the image display region by the difference in the thickness of the color material. Further, when liquid crystal is sealed by a dropping injection method, the liquid crystal is dropped from a sealing material in consideration of the spread of the dropped liquid crystal between the substrates when opened to the atmosphere. For this reason, in the region in the vicinity of the sealing material, the amount of liquid crystal dropped per area is the same as that in the image display region, and the amount of liquid crystal is insufficient. Therefore, in the region around the image display region, the substrate interval is small.

  Even in the area around the image display area, even if a spacer having the same height as the spacer arranged in the image display area is arranged, the image display area and the peripheral area of the image display area Since the height of the upper portion of the spacer is different by the height of the material, a region having a narrow substrate interval is formed between the image display region and the sealing material. In addition, in order to eliminate the distortion in the region where the substrate interval is small, there may be a portion where the interval is larger than the predetermined substrate interval, and unevenness in the substrate interval is generated in the periphery of the image display region and the outer periphery of the image display region. There is a problem that occurs and the display quality of the image is impaired. In particular, when the distance from the image display area to the sealing material is large, the above-described problem is likely to occur because the area where the color material described above is not widened.

  According to the technique described in Patent Document 1, a closed region including an image display region and one or more small spaces independent of the closed region are formed by a sealing material. After bonding the substrates, the small space is filled with vacuum or liquid crystal, and the amount of liquid crystal in the closed region is adjusted by opening the partition between the closed region and the small space according to the amount of liquid crystal in the closed region. To control the substrate spacing.

JP 2006-350144 A

  The method of Patent Document 1 described above is considered to be effective for the problem of an increase in the distance between the substrates due to an excessive amount of liquid crystal in the entire closed region including the image display region. On the other hand, the amount of liquid crystal per unit volume is almost equal to the problem that the distance between the substrates is reduced due to the insufficient amount of liquid crystal, simply by communicating with a small space filled with a liquid crystal material of the same internal pressure. Since it does not increase, the improvement effect cannot be expected so much. That is, when a region having a small substrate interval is generated in a relatively wide region from the image display region to the sealing material, it is considered that the substrate interval in this region cannot be sufficiently increased. Furthermore, a state in which a portion having a large substrate interval and a portion having a small substrate interval are not necessarily caused by excess or deficiency of the liquid crystal material in the closed region, and thus cannot be solved by the method according to Patent Document 1.

  In addition, since the sealing material used in the dropping injection method is uncured when the substrates are bonded together, impurities generated by the contact between the dropped liquid crystal and the uncured sealing material are eluted into the liquid crystal, resulting in image display quality. There were problems such as deterioration and burn-in that left the previous image even when the display was switched.

  The present invention has been made in order to solve the above-described problems. An image in which a gap between a pair of substrates of a liquid crystal panel is not uniform and impurities are not mixed into the liquid crystal sealed between the substrates. An object is to provide a liquid crystal panel having high display quality and a liquid crystal display device having the same.

  A liquid crystal panel according to the present invention is a liquid crystal panel that sandwiches liquid crystal between a pair of substrates, and forms an image display region for displaying an image and a first closed region surrounding at least the image display region. The second closed region is formed by adhering the pair of substrates to each other with a sealing material sandwiching the liquid crystal in the first closed region and the sealing material in a region adjacent to the outside of the first closed region. And an auxiliary sealant for sandwiching the liquid crystal in the second closed region by bonding the pair of substrates.

  According to the present invention, the image display area and the peripheral pattern area formed in the periphery of the image display area and formed with peripheral patterns such as circuits and wirings are separately surrounded by the first closed area and the first closed area, respectively. By setting it as the 2 closed area | region, it becomes possible to make a closed area | region surrounding the very close proximity of an image display area. Therefore, since it becomes possible to drop liquid crystal separately with respect to the first closed region including the image display region and the second closed region, it is easy to adjust the amount of liquid crystal dropped, and an appropriate amount By dropping the liquid crystal, it is possible to reduce the difference in the substrate interval between the first closed region and the second closed region.

  Therefore, it is possible to suppress the unevenness of the substrate interval in the image display area caused by the difference in the substrate interval, and in particular, the unevenness of the substrate interval generated in the outer peripheral portion of the image display area can be suppressed. A reduced high-quality image can be displayed. In addition, the variation in the amount of liquid crystal dripping between individual products is reduced, and the yield of products is improved.

  Alternatively, since the image display area can be surrounded by a sealing material with a minimum closed area, it is possible to minimize the elution of impurities into the liquid crystal caused by the contact between the liquid crystal and the uncured sealing material. Become. Therefore, since the deterioration of liquid crystal quality due to impurity elution can be reduced, it is possible to obtain a highly durable liquid crystal panel with little image burn-in even when the same image is displayed for a long time.

3 is a plan view of the liquid crystal panel according to Embodiment 1. FIG. 4 is a cross-sectional view of the liquid crystal panel according to Embodiment 1. FIG. 1 is a diagram illustrating a configuration of a liquid crystal display device according to Embodiment 1. FIG. 6 is a cross-sectional view of a liquid crystal panel according to Embodiment 2. FIG. 6 is a plan view of a liquid crystal panel according to Embodiment 3. FIG. 6 is a diagram showing another example of a liquid crystal panel according to Embodiment 3. FIG. 6 is a plan view of a liquid crystal panel according to Embodiment 4. FIG.

<Embodiment 1>
<Configuration>
FIG. 1 shows a plan view of a liquid crystal panel according to the present embodiment. FIG. 2 is a cross-sectional view taken along line AB in FIG.

  On the TFT substrate 2, signal wirings (not shown) for applying a voltage to the liquid crystal material are formed in a grid pattern in the image display region 4, and switching of a thin film transistor (TFT) or the like is made at each grid intersection. An element and a transparent pixel electrode are disposed. A black mask (not shown) that blocks unnecessary light between pixels is formed on the CF substrate 1 in correspondence with the arrangement of thin film transistors and the like formed on the TFT substrate 2. Are provided with color materials 3 colored in red, green, and blue for color display. On the color material 3, a transparent electrode (not shown) is formed of ITO (Indium Tin Oxide) or the like. Further, an alignment film (not shown) is formed in a region wider than the image display region 4 of the CF substrate 1 and the TFT substrate 2, and a rubbing process is performed on each substrate. The rubbing direction is set so that when the CF substrate 1 and the TFT substrate 2 are superposed, the liquid crystal orientation is twisted nematic (TN) mode twisted by 90 °.

  Next, a first closed region 12 a is formed by an ultraviolet curable sealant 5 a so as to surround the image display region 4 of the TFT substrate 2. Further, the auxiliary sealing material 5b is arranged so as to surround the area where the peripheral pattern such as the circuit or wiring formed for image display or other control is adjacent to the first closed area 12a, and the second A closed region 12b is formed.

  In the first closed region 12a, columnar spacers 6a and 6b for maintaining the substrate interval are further arranged. Here, as shown in FIG. 1, the columnar spacer 6a is disposed on the color material 3, and the columnar spacer 6b is disposed in a region between the image display region 4 and the sealing material 5a. In addition, the columnar spacer 6b may be omitted by arranging the sealing material 5a very close to the image display region 4.

  Next, the first closed region 12a and the second closed region 12b on the TFT substrate 2 are filled with the liquid crystal 11, and the TFT substrate 2 and the CF substrate 1 are bonded together to obtain a liquid crystal panel. Further, as shown in FIG. 3, polarizing plates 22 are attached to both surfaces of the liquid crystal panel 21, a driving IC 24 for driving each pixel, a circuit board 23, etc. are connected to the terminal take-out unit 7, and a backlight 25 is incorporated to display a liquid crystal display. Device 20 was obtained.

<Manufacturing method>
The formation of grid-like wiring, TFT, transparent pixel electrodes, etc. on the TFT substrate 2 and the formation of the black mask, color material 3, transparent electrodes, etc. on the CF substrate 1 are performed by a conventional method for manufacturing a liquid crystal display panel. Done. The columnar spacers 6a and 6b in the first closed region 12a are formed by, for example, photolithography.

  In forming an alignment film on the TFT substrate 2 and the CF substrate 1, an alignment film material made of an organic polymer is disposed by a printing method or the like, and is formed by a baking process. In this embodiment mode, the rubbing process is performed assuming a TN mode in which an electric field is applied vertically between substrates, but a liquid crystal material includes a VA (Vertical Alignment) mode, an ECB (Electrically Controlled Birefringence) mode, Alternatively, the driving may be performed in an IPS (In Plane Switching) mode or a FFS (Fringe Field Switching) mode in which a parallel electric field is applied on one substrate.

  In the present embodiment, the liquid crystal 11 is sealed by a dropping injection method. The first closed region 12a and the second closed region 12b on the TFT substrate 2 are filled with the liquid crystal 11 by dropping an appropriate amount of liquid crystal.

  The liquid crystal dropping amount to the first closed region 12a is determined from the volume estimated from the area of the first closed region 12a and the height of the spacer 6a. Further, in the present embodiment, since no spacer is disposed in the second closed region 12b, the amount of liquid crystal dripped onto the second closed region 12b depends on the area of the second closed region 12b and the color material 3 high. And the volume estimated from the sum of the heights of the spacers 6 a formed on the color material 3.

  The bonding between the TFT substrate 2 and the CF substrate 1 is performed under reduced pressure, and after the bonding, the pair of substrates is opened to a predetermined interval due to a pressure difference between the inside and outside of the liquid crystal panel. Until crushed.

  Next, the sealing material 5a and the auxiliary sealing material 5b are irradiated with ultraviolet rays, whereby the sealing material is cured and the two substrates are bonded. In order to prevent the liquid crystal 11 in the image display region 4 from being contaminated by contact with the uncured seal material, in particular, for the inner end side of the sealing material 5a surrounding the first closed region 12a including the image display region 4, Ensure that the UV light is sufficiently irradiated and cured quickly. Specifically, for example, in a light-shielding layer such as a black mask or wiring provided on the CF substrate 1, an opening is formed so that ultraviolet light can be transmitted in a portion overlapping the inner end side of the sealing material 5 a surrounding the image display region 4. It is good to provide a part or to detour. On the other hand, since the liquid crystal material 11 that does not include the image display region 4 and is sandwiched between the second closed regions 12b does not perform an operation that contributes to image display, the light shielding layer as described above is not covered with the auxiliary seal material 5b. It is not always necessary to design such as. The reason why the peripheral pattern is sealed in the second closed region 12b surrounded by the auxiliary sealing material 5b together with the liquid crystal 11 is short-circuited by exposing the drive circuit and the wiring material included in the peripheral pattern to the external environment. This is to protect against corrosion, contamination, etc. In the conventional liquid crystal panel, the peripheral pattern is protected by being sealed in a closed region surrounded by a sealing material surrounding the image display region.

  In the present embodiment, a closed region is formed on the TFT substrate 2 using a sealant and a liquid crystal is dropped and bonded to the CF substrate 1, but the closed region is located at a corresponding position on the CF substrate 1. And the liquid crystal may be dropped and bonded to the TFT substrate 2.

<Effect>
The liquid crystal panel in the present embodiment is a liquid crystal panel in which liquid crystal is sandwiched between a pair of substrates, that is, a CF substrate 1 and a TFT substrate 2, and includes an image display region 4 for displaying an image, and at least an image display region. 4, a first closed region 12a is formed, and a pair of substrates are bonded to each other, thereby adjoining the first closed region 12a with the sealant 5a sandwiching the liquid crystal 11 and the outside of the first closed region 12a. A second closed region 12b is formed in the region to be sealed with the sealant 5a, and an auxiliary sealant 5b that holds the liquid crystal 11 in the second closed region 12b is provided by bonding a pair of substrates.

  Accordingly, the image display area 4 and the peripheral pattern area formed around the image display area 4 and formed with peripheral patterns such as circuits and wirings are separately surrounded by the sealing material 5a and the auxiliary sealing material 5b, respectively. By using the closed region 12a and the second closed region 12b, it is possible to surround the region very close to the image display region 4 to be a closed region. Therefore, since it becomes possible to drop liquid crystal separately with respect to the first closed region 12a including the image display region 4 and the second closed region 12b, it is easy to adjust the amount of liquid crystal dropped, By dropping an appropriate amount of liquid crystal, it is possible to reduce the difference in the substrate interval between the first closed region 12a and the second closed region 12b. Therefore, it is possible to suppress the non-uniformity of the substrate interval in the image display area 4 resulting from the above-described difference in the inter-substrate interval. In addition, it is possible to display a high-quality image with reduced display unevenness. Further, as described above, since the liquid crystal dropping amount can be easily adjusted, the variation in the liquid crystal dropping amount among individual products is reduced, and the yield of products is improved.

  Further, since the image display region 4 is surrounded by the sealing material 5a with the minimum closed region, it is possible to minimize the elution of impurities into the liquid crystal 11 caused by the contact between the liquid crystal 11 and the uncured sealing material 5a. It becomes possible. Therefore, since the quality deterioration of the liquid crystal 11 due to impurity elution can be reduced, it is possible to obtain a highly durable liquid crystal panel with little image burn-in even when the same image is displayed for a long time. In addition, even if the auxiliary sealing material 5b before curing elutes into the liquid crystal 11 in the manufacturing process, the image display region 4 is not affected, so that the time restriction in the liquid crystal dropping process and the sealing material curing process is relaxed. The effect of improving product productivity is expected.

  The liquid crystal display device 20 according to the present embodiment includes a liquid crystal panel 21 according to the present embodiment, a circuit board 23 connected to the liquid crystal panel 21, and a backlight disposed on the back side of the liquid crystal panel 21. 25. Therefore, it is possible to display a high-quality image by configuring the liquid crystal display device 20 using the liquid crystal panel 21 according to the present embodiment.

<Embodiment 2>
FIG. 4 shows a cross-sectional view of the liquid crystal panel according to the present embodiment. The difference from the first embodiment (FIG. 2) is that a columnar spacer 6c is also provided in the second closed region 12b surrounded by the auxiliary sealing material 5b. Since the other configuration is the same as that of the first embodiment, the description of the same part is omitted. In FIG. 4, the same parts as those in FIG.

  The columnar spacer 6c arranged in the second closed region 12b is formed at the same timing as the columnar spacers 6a and 6b arranged in the first closed region 12a, for example, by a common photolithography process. . That is, it can be formed without additional manufacturing steps.

<Effect>
The liquid crystal panel in the present embodiment further includes a spacer for maintaining the distance between the pair of substrates in the second closed region 12b.

  Therefore, by arranging the columnar spacers 6c also in the second closed region 12b, the columnar spacers 6c reduce the reduction of the substrate interval even when the amount of liquid crystal dripping with respect to the second closed region 12b is insufficient. be able to. Therefore, by reducing the reduction in the substrate interval in the second closed region 12b, the influence of the change in the substrate interval in the second closed region 12b on the substrate interval in the first closed region 12a can be reduced. Therefore, it is possible to maintain a more uniform substrate interval in the image display region 4 and display a higher quality image.

<Embodiment 3>
FIG. 5 shows a plan view of the liquid crystal panel according to the present embodiment. The difference from the second embodiment is that the second closed region 12b surrounded by the auxiliary seal material 5b is further provided with an independent seal material 5c formed independently of the auxiliary seal material 5b in addition to the columnar spacer 6c. It is a point to prepare. Since the other configuration is the same as that of the second embodiment, the description of the same portion is omitted. Further, in FIG. 5, the same parts as those in FIG.

  As shown in FIGS. 6A and 6B, when there are a plurality of second closed regions 12b surrounded by the auxiliary sealing material 5b, for each of the plurality of second closed regions 12b, An independent sealing material 5c independent from the auxiliary sealing material 5b is disposed.

<Effect>
The liquid crystal panel in the present embodiment further includes an independent sealing material 5c formed independently of the auxiliary sealing material 5b in the second closed region 12b.

  Therefore, even if the liquid crystal dropping amount with respect to the second closed region 12b is insufficient by further disposing the independent sealing material 5c in addition to the columnar spacer 6c in the second closed region 12b, the columnar spacer 6c. And the independent sealing material 5c can further reduce the reduction in the distance between the substrates. Therefore, by reducing the reduction in the substrate interval in the second closed region 12b, the influence of the change in the substrate interval in the second closed region 12b on the substrate interval in the first closed region 12a can be further reduced. Therefore, it is possible to maintain a more uniform substrate interval in the image display region 4 and to display a higher quality image.

<Embodiment 4>
FIG. 7A shows a plan view of the liquid crystal panel according to the present embodiment. As shown in FIG. 7A, peripheral patterns such as circuits and wirings formed for image display or other control are arranged outside the image display area 4 and across a plurality of sides of the image display area 4. In this case, the auxiliary sealing material 5b is arranged so as to surround this peripheral pattern with a single second closed region. Since other configurations are the same as those of the first embodiment (FIG. 1), description thereof is omitted.

  When the peripheral pattern is formed so as to surround all sides of the image display area 4, the second closed area 12b surrounds the peripheral pattern and the first closed area 12a as shown in FIG. 7B. As described above, the auxiliary sealing material 5 b is disposed along the outer periphery of the CF substrate 1.

<Effect>
In the liquid crystal panel in this embodiment, the second closed region 12b is single.

  Accordingly, since the second closed region 12b can be formed by efficiently surrounding the peripheral pattern provided over a plurality of sides with the auxiliary seal material 5, it is possible to reduce the amount of use of the seal material. Further, since the second closed region 12b is formed as one, the excess and deficiency of the liquid crystal dropping amount is made uniform in one closed region, so that the liquid drops in the second closed region 12b. It is relatively easy to adjust the amount of liquid crystal.

  In the liquid crystal panel according to the present embodiment, the second closed region 12b is formed along the outer periphery of the pair of substrates, that is, the outer periphery of the CF substrate 1.

  Therefore, by arranging the auxiliary sealing material 5b along the outer periphery of the CF substrate 1, the peripheral pattern is always included in the second closed region 12b. Therefore, regardless of the position where the peripheral pattern is formed, the peripheral pattern can be sealed in the second closed region 12b surrounded by the auxiliary sealant 5b together with the liquid crystal 11, and the arrangement of the peripheral pattern has changed. Even in such a case, it is not necessary to change the arrangement of the auxiliary seal material 5b, so that it is possible to easily cope with a change in specifications.

<Summary>
Below, it demonstrates, referring FIG. 1 and FIG. When the liquid crystal is sandwiched by only one closed region, the seal material is disposed so as to surround both the image display region 4 and the pattern such as the wiring around the image display region 4. The distance to the material will be separated.

  On the other hand, in the present invention, the first closed region 12a is formed in order to form the two closed regions (the first closed region 12a and the second closed region 12b) by the sealing material 5a and the auxiliary sealing material 5b. The sealing material 5a is not particularly required to enclose and seal a peripheral pattern or the like, and it is only necessary to form the image display area 4 so as to surround the image display area 4 at a minimum. can do. That is, the interval between the seal material 5a and the image display area 4 can be narrowed, and the columnar spacer 6b shown in FIG. 2 can be omitted. On the other hand, the second closed region 12b is formed, for example, along the outer periphery of the CF substrate 1 so as to surround a pattern such as wiring around the image display region 4 (see FIG. 7B).

  Therefore, in the first closed region 12a, the region between the image display region 4 and the sealing material 5a that is not held by the columnar spacers 6a formed in the image display region 4 is almost eliminated, and therefore the outer periphery of the image display region 4 is eliminated. It is possible to significantly reduce the unevenness of the substrate interval.

  The first closed region 12a surrounded by the sealing material 5a has a role of protecting the liquid crystal 11 filled in the image display region 4 from contamination in addition to the role of maintaining the substrate interval. Even if the sealing material 5a is arranged very close to the image display area 4, the liquid crystal 11 sandwiched between the closed areas 12a is managed and filled without contamination, and operates as a liquid crystal contributing to proper image display without any trouble. .

  On the other hand, the liquid crystal 11 held in the second closed region 12b including the peripheral pattern is not considered for the contamination of the liquid crystal, but the liquid crystal 11 in the second closed region 12b does not operate to contribute to image display. There is no particular problem.

  Further, in the case where the liquid crystal is not dropped just by forming the closed region with the auxiliary sealing material 5b for the second closed region 12b, the large size after the bonding step in vacuum in the manufacturing process of the dropping injection method is used. When the atmospheric pressure is released, the second closed region 12b becomes a vacuum state and is crushed to atmospheric pressure. As a result, unevenness in the substrate spacing also occurs around the first closed region 12a including the image display region 4.

  On the other hand, in the present invention, since the second closed region 12b is sealed after the liquid crystal is dropped, an internal pressure is generated by the liquid crystal, and the second closed region 12b is not collapsed to the atmospheric pressure when the atmospheric pressure is released. Further, by dropping an appropriate amount of liquid crystal in the second closed region 12b, the difference in the substrate interval can be reduced in the first closed region 12a and the second closed region.

  For the reasons described above, as described in the first embodiment, it is possible to reduce the unevenness of the substrate interval generated in the outer peripheral portion of the image display area 4 and display a high-quality image, and the first closed area. Contamination of the liquid crystal 11 of 12a is reduced, and image burn-in can be reduced. Further, the second closed region 12b surrounded by the auxiliary sealing material 5b is formed so as to surround at least the circuits and wirings around the image display region 4 and filled with liquid crystal, thereby short-circuiting the circuits and wirings around the image display region 4. It is possible to protect from corrosion, contamination.

  It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

  1 CF substrate, 2 TFT substrate, 3 color material, 4 image display area, 5a seal material, 5b auxiliary seal material, 5c independent seal material, 6a, 6b, 6c columnar spacer, 7 terminal extraction part, 11 liquid crystal, 12a 1st Closed region, 12b second closed region, 20 liquid crystal display device, 21 liquid crystal panel, 22 polarizing plate, 23 circuit board, 24 driving IC, 25 backlight.

Claims (6)

A liquid crystal panel that sandwiches liquid crystal between a pair of substrates,
An image display area for displaying an image;
A sealing material that sandwiches liquid crystal in the first closed region by forming a first closed region surrounding at least the image display region and bonding the pair of substrates;
A second closed region is formed with the sealing material in a region adjacent to the outside of the first closed region, and the pair of substrates are bonded to assist holding the liquid crystal in the second closed region. Sealing material,
Comprising
LCD panel. A spacer for maintaining a distance between the pair of substrates in the second closed region;
The liquid crystal panel according to claim 1. The second closed region further comprises an independent sealing material formed independently of the auxiliary sealing material,
The liquid crystal panel according to claim 1 or 2. The second closed region is single,
The liquid crystal panel according to claim 1. The second closed region is formed along an outer periphery of the pair of substrates,
The liquid crystal panel according to claim 4. A liquid crystal panel according to claim 1;
A circuit board connected to the liquid crystal panel;
A backlight disposed on the back side of the liquid crystal panel;
Comprising
Liquid crystal display device.

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