JP2008096836A - Manufacturing method of liquid crystal display panel, and liquid crystal display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a liquid crystal display panel with which the liquid crystal display panel having a distance between its actual liquid crystal display area and its end face less than that of the conventional liquid crystal display panel is manufactured without producing an electroric corrosion problem due to a liquid crystal residing on a canopy part. <P>SOLUTION: The manufacturing method includes: a step to form a sealing material 3 composed of a single material with a shape to completely surround a liquid crystal sealing area on a CF substrate; a step to seal in the liquid crystal by sticking the CF substrate and a TFT substrate to each other in the state in which the liquid crystal has been sealed in the area surrounded by the sealing material 3; and a step to form the end faces by forming at least a part of end faces of the liquid crystal display panel by cutting off the CF substrates, the TFT substrates and the sealing material 3 in areas with the sealing material 3 arranged thereon. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method of manufacturing a liquid crystal display panel in which two substrates are arranged to face each other and liquid crystal is sealed in a gap between the two substrates, and a liquid crystal display panel.

  In general, a liquid crystal panel has a structure in which two glass substrates are overlapped and bonded in parallel with a certain minute gap therebetween, and liquid crystal is filled in the gap. As a method of manufacturing such a liquid crystal panel, a conventional general method will be described with reference to FIGS. 8 (a) to 8 (d).

  First, as shown in FIG. 8A, when a glass substrate 101 as a CF (Color Filter) and a glass substrate 102 as a TFT (Thin Film Transistor) are bonded together, a sealing material is attached to one of these two sheets. 103 is arranged. In the example shown in FIG. 8A, the sealing material 103 is bonded and fixed to the surface of the glass substrate 101.

  The sealing material 103 is arranged in a frame shape so as to define a region to be a space for confining liquid crystal (hereinafter referred to as “liquid crystal cell”), but it is not a completely closed ring shape, but is shown in FIG. As shown, one place is cut off as an inlet 116.

  The glass substrates 101 and 102 are large-sized substrates from which a plurality of liquid crystal panels can be cut out, and a plurality of sealing materials 103 are arranged corresponding to each liquid crystal panel. As the sealing material 103, for example, a thermosetting resin or the like is used.

  These glass substrates 101 and 102 are bonded together by a sealing material 103 and heated to cure the sealing material 103. Thereafter, the glass substrates 101 and 102 are divided at a time for each individual region surrounded by the sealing material 103. Thus, a bonded substrate 114 provided with the liquid crystal cell 115 as shown in FIG. 8B is obtained.

  The bonded substrate 114 is divided, and the inlet 116 that becomes a seal break is exposed on the side surface of the bonded substrate 114. The separated bonded substrate 114 is accommodated in a vacuum apparatus, and the inside and outside of the liquid crystal cell 115 are evacuated. In this state, as shown in FIG. 8C, the inlet 116 formed by the cut of the sealing material 103 is immersed in the liquid crystal 104, and the inside of the vacuum apparatus is gradually returned to atmospheric pressure. Then, the liquid crystal 104 enters the liquid crystal cell 115 due to a pressure difference inside and outside the liquid crystal cell 115 and a capillary phenomenon.

  Thus, after the liquid crystal cell 115 is filled with the liquid crystal 104, the sealing resin 105, which is an ultraviolet curable resin, is applied to the injection port 116. The sealing resin 105 is cured by irradiating ultraviolet rays to obtain a bonded substrate 114 in which the liquid crystal 104 is sealed in the liquid crystal cell 115 as shown in FIG.

  As described above, conventionally, an injection port for injecting liquid crystal is provided in the liquid crystal sealing region, and after the liquid crystal is put therein by using a vacuum injection method or the like, the liquid crystal injection port is sealed and the liquid crystal panel is sealed. It was common to make it.

  In the liquid crystal panel produced by this method, a region (hereinafter referred to as a collar) sandwiched between two glass substrates exists outside the region surrounded by the sealing material. And in the process of injecting the liquid crystal among the processes of the above manufacturing method, there has been a problem that the liquid crystal stays in the flange around the injection port. In recent years, with the demand for thinning liquid crystal panels, the cell gap has been narrowed, and it has become difficult to wash out the liquid crystal staying in the heel. There has also been a problem that electrolytic corrosion occurs on the electrode formed on the glass substrate by the staying liquid crystal.

With respect to this problem, Patent Document 1 discloses a technique characterized in that the flange portion of the panel is eliminated by laser-cutting the seal end or the seal central portion, and at the same time a narrow frame panel is achieved. In addition, for achieving a narrow frame, Patent Document 2 discloses a technique for dividing the seal.
JP 2001-75064 A (published on March 23, 2001) JP 2001-183675 A (published July 6, 2001)

  Here, in the conventional vacuum injection method, as described above, the sealing material 103 is formed in a state where a part of the region in which the liquid crystal is sealed is opened as an injection port, and after the liquid crystal is vacuum-injected, the injection port is sealed with a sealing resin. It is made to close by 105. A bonded substrate board 114 produced in this way is shown in FIG. In the case of this manufacturing method, as shown in the figure, it is conceivable that the sealing resin 105 is formed in a state of protruding inside the liquid crystal cell 115. This is because the sealing resin 105 is formed using a capillary phenomenon with respect to a gap between two substrates, and it is difficult to control the degree of penetration. That is, it is necessary to set the actual liquid crystal display area 121 in consideration of the error range D of the degree of penetration of the sealing resin 105. Therefore, there is a problem that the narrowing of the frame of the liquid crystal display panel is limited.

  In recent years, in mobile devices such as mobile phones, portable information terminal devices, and portable game machines, there has been an increasing demand for compact devices in order to improve portability. That is, in addition to the demand for reducing the external size of the liquid crystal panel and making the pixel region as wide as possible, there is an increasing demand for thin and light weight, and there is a need to reduce the thickness of the substrate.

  Here, Patent Document 1 discloses a technique of laser-cutting a glass substrate. However, when laser cutting a glass substrate of less than 0.3 mm, there is a problem that it is difficult to cut cleanly because the way in which the heat of the laser is transmitted in the portion where the injection port and the seal are not formed is different. .

  On the other hand, Patent Document 2 refers to dividing a glass substrate by scribing using a blade (wheel). In the case of the method of dividing by the wheel, when the wheel moves from a portion where the sealing material is arranged to a portion where the sealing material is not arranged (or vice versa), the following problems occur.

  In FIG. 10, when cutting from the glass substrate 101 side by a wheel 131 as a rotary blade, the wheel 131 passes through a region where the seal material 103 is not formed between regions where the seal material 103 is formed. Indicates the state. As shown in the figure, in a region where the sealing material 103 is not formed, scribing may not be performed properly due to the glass substrate 101 being bent. Therefore, in such a place, cutting may not be performed properly, and cracks and chips may occur.

  Moreover, FIG. 11 has shown the state in case the area | region in which the sealing material is not formed becomes the edge part of a glass substrate. In this case, if the wheel 131 approaches the area where the sealing material is not formed, the glass substrate 101 may be bent by the pressing of the wheel, and a crack may be generated.

  The present invention has been made in view of the above-described problems, and the object thereof is not to cause a problem of electrolytic corrosion due to liquid crystal staying in the buttock, and to provide an actual liquid crystal display region and an end face of the liquid crystal display panel. It is to provide a liquid crystal display panel manufacturing method and a liquid crystal display panel capable of manufacturing a liquid crystal display panel having a smaller distance from the liquid crystal display panel.

  Another object of the present invention is to reduce the distance between the actual liquid crystal display region and the end face of the liquid crystal display panel without causing the problem of electrolytic corrosion due to the liquid crystal staying in the collar, and a thin substrate. It is an object to provide a method for manufacturing a liquid crystal display panel and a liquid crystal display panel that can manufacture a liquid crystal display panel using the liquid crystal display panel.

  The method for manufacturing a liquid crystal display panel according to the present invention is a method for manufacturing a liquid crystal display panel in which two substrates are arranged to face each other, and liquid crystal is sealed in a gap between the two substrates. A sealing material forming step of forming a sealing material made of a single material in a shape completely surrounding the region enclosing the liquid crystal on at least one of the substrates, and encapsulating the liquid crystal in the region surrounded by the sealing material At least one of the liquid crystal display panels is obtained by cutting the two substrates and the sealing material in a liquid crystal sealing step for bonding the two substrates together in a state where the two substrates are bonded, and in the region where the sealing material is disposed. And an end face forming step of forming an end face of the part.

  According to the above method, first, the sealing material is formed of a single material in a shape that completely surrounds the region in which the liquid crystal is enclosed, and two sheets of liquid crystal are enclosed in the region surrounded by the sealing material. The substrates are bonded together. Here, when the liquid crystal is sealed by the vacuum injection method, as described above, it is necessary to set the actual liquid crystal display region in consideration of the error range of the degree of penetration of the sealing resin. On the other hand, as described above, when the sealing material is formed of a single material in a shape that completely surrounds the region enclosing the liquid crystal, the liquid crystal display region is set from just inside the region where the sealing material is formed. It becomes possible.

  Further, in the above method, since the two substrates and the sealing material are cut in the region where the sealing material is disposed, there is no problem due to the formation of the above-described collar portion, and the liquid crystal is sealed. It is possible to reduce the distance between the region to be formed and the end face of the liquid crystal display panel.

  That is, according to the above method, a liquid crystal display panel is manufactured without causing the problem of electrolytic corrosion due to the liquid crystal staying in the collar portion and having a smaller distance between the actual liquid crystal display region and the end face of the liquid crystal display panel. It becomes possible.

  Further, in the method for manufacturing a liquid crystal display panel according to the present invention, in the above method, the liquid crystal encapsulating step bonds the two substrates after the liquid crystal is dropped onto the substrate on which the sealing material is formed. It is good also as the method which is a process.

  According to the above method, the liquid crystal is sealed and the two substrates are bonded by a so-called liquid crystal dropping bonding method. Therefore, the liquid crystal can be accurately sealed even in a state in which the sealing material is formed of a single material in a shape that completely surrounds the region in which the liquid crystal is sealed.

  Further, in the method for manufacturing a liquid crystal display panel according to the present invention, in the above method, in the sealing material forming step, the sealing material is formed in a shape corresponding to four sides of a quadrangle, and the end surface forming step. In the method, the two substrates and the sealing material may be cut in a region corresponding to the three sides in the region where the sealing material is disposed.

  According to the above method, the sealing material forming region is cut at three sides among the four sides of the quadrangle formed by the sealing material, and the end face of the liquid crystal display panel is formed. Here, since it is necessary to form a terminal for driving the liquid crystal display panel in a region corresponding to the remaining one side, it is impossible to cut the sealing material forming region. That is, according to the above method, the frame portion of the liquid crystal display panel other than the terminal formation region can be made smaller.

  Moreover, the manufacturing method of the liquid crystal display panel which concerns on this invention is good also as a method which cut | disconnects the said 2 board | substrate and the said sealing material with the wheel provided with the rotary blade in the said end surface formation process in said method.

  According to said method, even if each thickness of said two board | substrate is about 0.3 mm or less, it becomes possible to perform a cutting process exactly.

  Further, in the method for manufacturing a liquid crystal display panel according to the present invention, in the above method, when cutting is performed in a region where the sealing material is disposed in the end surface forming step, the sealing material is obtained by extending the cutting. A region not disposed is also cut, and the two substrates in the region that is to be cut in the end surface forming step and the sealing material is not disposed before the end surface forming step. Alternatively, a spacer installation step of providing a spacer in at least a part of the gap may be performed.

  According to the above method, in the region where the sealing material is not disposed, the cutting is performed in the region where the spacer is disposed, so that the bending of the substrate due to the pressing of the wheel is suppressed. Therefore, it is possible to accurately perform the cutting in the region where the sealing material is not disposed without causing a crack or the like.

  In addition, the method for manufacturing a liquid crystal display panel according to the present invention is the method for manufacturing a liquid crystal display panel in which two substrates are arranged to face each other, and liquid crystal is sealed in a gap between the two substrates. A sealing material forming step of forming a sealing material for encapsulating the liquid crystal on at least one of the substrates, and bonding the two substrates together with the liquid crystal sealed in a region surrounded by the sealing material. At least a part of the end face of the liquid crystal display panel is cut by cutting the two substrates and the sealing material with a wheel provided with a rotary blade in a region where the sealing material is arranged and a region where the sealing material is disposed. An end face forming step to be formed, and in the end face forming step, when cutting is performed in a region where the seal material is arranged, the seal material is arranged as an extension of the cut. A region that is to be cut in the end surface forming step before the end surface forming step and in which the sealant is not disposed is a gap between the two substrates. In this method, a spacer installation step of providing a spacer at least in part is performed.

  In the above method, since the two substrates and the sealing material are cut in the region where the sealing material is disposed, the liquid crystal is sealed without causing the problem due to the formation of the collar portion described above. It is possible to reduce the distance between the region and the end face of the liquid crystal display panel.

  Further, since the cutting is performed by the wheel, the cutting process can be accurately performed even if the thickness of each of the two substrates is less than 0.3 mm.

  Moreover, in the area | region where the sealing material is not arrange | positioned, since it cut | disconnects in the area | region where the spacer is arrange | positioned, the bending of the board | substrate by the press of a wheel will be suppressed. Therefore, it is possible to accurately perform the cutting in the region where the sealing material is not disposed without causing a crack or the like.

  That is, according to the above-described method, the distance between the actual liquid crystal display region and the end face of the liquid crystal display panel can be reduced and a thin substrate can be formed without causing the problem of electrolytic corrosion due to the liquid crystal staying in the collar. The liquid crystal display panel used can be manufactured.

  Moreover, the manufacturing method of the liquid crystal display panel which concerns on this invention is good also as a method in which a spacer is installed also in the area | region which encloses the said liquid crystal in the said spacer installation process in said method.

  According to the above method, the installation of the spacer for suppressing the bending of the substrate due to the pressing of the wheel and the installation of the spacer for ensuring the gap between the substrates in the region where the liquid crystal is sealed are performed in the same process. It becomes possible. Therefore, it is possible to install the above-mentioned two purpose spacers without increasing the number of manufacturing steps.

  Further, in the case of the liquid crystal display panel manufactured by the method for manufacturing a liquid crystal display panel according to the present invention described above, there is no problem of electrolytic corrosion due to the liquid crystal staying in the buttocks, and the actual liquid crystal display region and the liquid crystal A liquid crystal display panel having a smaller distance from the end face of the display panel can be obtained.

  The liquid crystal display panel according to the present invention includes two substrates disposed opposite to each other, a liquid crystal sandwiched in a gap between the two substrates, and a gap between the two substrates. A sealing material formed of a single material in a shape that completely surrounds a region that encloses liquid crystal, and at least part of the end surfaces of the two substrates, and a region side of the sealing material that encloses the liquid crystal In this configuration, at least a part of the outer surface opposite to the surface is disposed on the same surface.

  According to the above configuration, the sealing material is formed of a single material in a shape that completely surrounds the region that encloses the liquid crystal, and the two substrates are in a state in which the liquid crystal is encapsulated in the region enclosed by the sealing material. Are pasted together. Here, when the liquid crystal is sealed by the vacuum injection method, as described above, it is necessary to set the actual liquid crystal display region in consideration of the error range of the degree of penetration of the sealing resin. On the other hand, as described above, when the sealing material is formed of a single material in a shape that completely surrounds the region enclosing the liquid crystal, the liquid crystal display region is set from just inside the region where the sealing material is formed. It becomes possible.

  In the above configuration, at least part of the end surfaces of the two substrates and at least part of the outer surface opposite to the surface of the sealing material that encloses the liquid crystal are disposed on the same surface. Therefore, there is no problem due to the formation of the above-described collar portion, and the distance between the region where the liquid crystal is sealed and the end face of the liquid crystal display panel can be reduced.

  That is, according to the above configuration, there is provided a liquid crystal display panel in which the problem of electrolytic corrosion due to the liquid crystal staying in the collar portion does not occur and the distance between the actual liquid crystal display region and the end face of the liquid crystal display panel is small. be able to.

  In the liquid crystal display panel according to the present invention, in the configuration described above, at least a part of the end surfaces of the two substrates and an outer surface on the side opposite to the surface on the region side where the liquid crystal is sealed in the sealing material. A spacer may be provided in at least a part of a region where the sealing material is not disposed in the gap between the two substrates on the surface on which at least a part is disposed.

  According to the above configuration, since the spacer is provided in the region where the sealing material is not formed on the end face of the liquid crystal display panel, even in the region where the sealing material is not formed, the two substrates are separated by an external force or the like. It is possible to prevent the vicinity of the end face from being bent. Therefore, generation | occurrence | production of the malfunction accompanying such a bending can be prevented.

  The liquid crystal display panel according to the present invention includes two substrates disposed opposite to each other, a liquid crystal sandwiched in a gap between the two substrates, and a gap between the two substrates. A sealing material formed so as to enclose liquid crystal, and at least part of the end surfaces of the two substrates and at least an outer surface of the sealing material opposite to the region side surface enclosing the liquid crystal Are disposed on the same surface, and at least one of the end surfaces of the two substrates and at least one of the outer surfaces of the sealing material on the side opposite to the surface on which the liquid crystal is sealed. The spacer is provided in at least a part of the region where the sealing material is not disposed in the gap between the two substrates on the surface where both the portions are disposed.

  In the above configuration, since at least part of the end surfaces of the two substrates and at least part of the outer surface on the side opposite to the surface of the sealing material on which the liquid crystal is sealed are disposed on the same surface. In addition, there is no problem due to the formation of the above-described collar portion, and the distance between the region where the liquid crystal is sealed and the end face of the liquid crystal display panel can be reduced.

  Further, since the spacer is provided in the region where the sealing material is not formed on the end surface of the liquid crystal display panel, the vicinity of the end surfaces of the two substrates bends by an external force or the like even in the region where the sealing material is not formed. This can be prevented. Therefore, generation | occurrence | production of the malfunction accompanying such a bending can be prevented.

  As described above, the manufacturing method of the liquid crystal display panel according to the present invention includes a sealing material made of a single material in a shape that completely surrounds the region in which the liquid crystal is sealed on at least one of the two substrates. A sealing material forming step for forming the liquid crystal, a liquid crystal sealing step for bonding the two substrates together in a state where the liquid crystal is sealed in a region surrounded by the sealing material, and a region where the sealing material is disposed, An end face forming step of forming at least a part of the end face of the liquid crystal display panel by cutting the two substrates and the sealing material. Accordingly, it is possible to manufacture a liquid crystal display panel in which the distance between the actual liquid crystal display region and the end face of the liquid crystal display panel is smaller without causing the problem of electrolytic corrosion due to the liquid crystal staying in the collar. There is an effect.

  In addition, as described above, the method for manufacturing a liquid crystal display panel according to the present invention includes a sealing material forming step of forming a sealing material that encloses the liquid crystal on at least one of the two substrates, and the seal. A liquid crystal sealing step in which the two substrates are bonded together in a state where the liquid crystal is sealed in a region surrounded by the material, and the two sheets by a wheel provided with a rotary blade in the region where the sealing material is disposed. Cutting the substrate and the sealing material to form at least a part of the end surface of the liquid crystal display panel. In the end surface forming step, cutting is performed in a region where the sealing material is disposed. When cutting, the region where the sealing material is not disposed by extension of the cutting is also cut and cut in the end face forming step before the end face forming step. A a region, a method of spacer setting step of providing a spacer on at least a portion of the gap between the substrates of the two above in the region where the sealing material is not arranged is made. This reduces the distance between the actual liquid crystal display area and the end face of the liquid crystal display panel without causing the problem of electrolytic corrosion due to the liquid crystal staying in the buttocks, and a liquid crystal display panel using a thin substrate. There exists an effect that it becomes possible to manufacture.

  The liquid crystal display panel according to the present invention includes two substrates disposed opposite to each other, a liquid crystal sandwiched in a gap between the two substrates, and a gap between the two substrates. A sealing material formed of a single material in a shape that completely surrounds a region that encloses liquid crystal, and at least part of the end surfaces of the two substrates, and a region side of the sealing material that encloses the liquid crystal In this configuration, at least a part of the outer surface opposite to the surface is disposed on the same surface. As a result, there is an effect that it is possible to provide a liquid crystal display panel in which the distance between the actual liquid crystal display region and the end face of the liquid crystal display panel is smaller without causing the problem of electrolytic corrosion due to the liquid crystal staying in the collar. Play.

  The liquid crystal display panel according to the present invention includes two substrates disposed opposite to each other, a liquid crystal sandwiched in a gap between the two substrates, and a gap between the two substrates. A sealing material formed so as to enclose liquid crystal, and at least part of the end surfaces of the two substrates and at least an outer surface of the sealing material opposite to the region side surface enclosing the liquid crystal Are disposed on the same surface, and at least one of the end surfaces of the two substrates and at least one of the outer surfaces of the sealing material on the side opposite to the surface on which the liquid crystal is sealed. The spacer is provided in at least a part of the region where the sealing material is not disposed in the gap between the two substrates on the surface where both the portions are disposed. Thereby, there is no problem due to the formation of the above-described collar portion, and there is an effect that the distance between the region where the liquid crystal is sealed and the end face of the liquid crystal display panel can be reduced.

  Further, even in a region where the sealing material is not formed, it is possible to prevent the vicinity of the end surfaces of the two substrates from being bent due to an external force or the like, and thus it is possible to prevent the occurrence of problems associated with such bending. There is an effect.

  An embodiment of the present invention is described below with reference to the drawings.

  First, the configuration of the liquid crystal display panel 10 according to the present embodiment will be described. 4A is a plan view of the liquid crystal display panel 10, FIG. 4B is a side view of FIG. 4A viewed from the lateral direction, and FIG. The side view when a) is seen from the downward direction is shown.

  The liquid crystal display panel 10 has a configuration in which the TFT substrate 2 and the CF substrate 1 are arranged to face each other. The TFT substrate 2 has a plurality of TFTs (Thin Film Transistors), a pixel electrode provided corresponding to each TFT, and a voltage applied to each TFT on a substrate made of a glass substrate or a resin film. For example, a plurality of wirings (gate wiring, source wiring, drain wiring, etc.) are formed. Further, the TFT substrate 2 is formed with a terminal portion 8 provided with a plurality of terminals electrically connected to each wiring. The CF substrate 1 has a configuration in which a counter electrode, a CF (Color Filter), a BM (Black Matrix), and the like are formed on a substrate composed of a glass substrate or the like.

  Liquid crystal is sealed in the gap between the TFT substrate 2 and the CF substrate 1. Then, by applying a voltage to the liquid crystal between the pixel electrode on the TFT substrate 2 and the counter electrode on the CF substrate 1, the alignment state of the liquid crystal is changed, and the liquid crystal display is performed. An area where the liquid crystal display is performed is referred to as a liquid crystal display area 21.

  In the present embodiment, the liquid crystal display panel 10 is assumed to be an active matrix type as described above, but is not limited to this, and display is performed by applying a voltage to the liquid crystal. Any liquid crystal display panel may be used. Further, the arrangement of CF and BM is not particularly limited.

  The liquid crystal is sealed in a space surrounded by the TFT substrate 2 and the CF substrate 1 and the sealing material 3 connecting the two substrates. The sealing material 3 is formed of a single material. In addition, at least a part of the outer surface of the sealing material 3 on the side opposite to the surface on which the liquid crystal is sealed is arranged to be the same surface as at least a part of the end surfaces of the TFT substrate 2 and the CF substrate 1. Has been. This configuration will be described in detail below.

  The TFT substrate 2 has a quadrangular shape, and its end face is formed at locations corresponding to four sides of the quadrilateral. Similarly, the CF substrate 1 also has a quadrangular shape, and its end face is formed at locations corresponding to the four sides of the quadrilateral. The sealing material 3 is also formed in a shape corresponding to the four sides of the quadrangle.

  Of the four end surfaces of the TFT substrate 2, a terminal portion 8 is formed on the substrate surface near one end surface. 4B and 4C, the three end surfaces of the TFT substrate 2 where the terminal portions 8 are not formed, the three end surfaces of the CF substrate 1, and the three end surfaces of the sealing material 3 The outer surface of the region corresponding to the side is arranged in the same plane.

  According to such a configuration, among the four end surfaces of the liquid crystal display panel 10, the sealing material 3 is formed from the same surface as the end surface of the three end surfaces, and the surface of the surface in contact with the liquid crystal sealing region in the sealing material 3. The liquid crystal display region 21 can be formed immediately from the inside. Therefore, the area | region (frame area | region) between the liquid crystal display area 21 and an end surface in the liquid crystal display panel 10 can be made small.

  Further, since the sealing material 3 is formed of a single material, the width of the region where the sealing material 3 is formed (the width when viewed from the direction perpendicular to the substrate surface) is almost uniform at any position. can do. Therefore, for example, the sealing material 3 is made of a different material depending on the location, and the liquid crystal display region 21 can be set larger than a configuration in which the width of the sealing material 3 differs depending on the material.

  In addition, the three end surfaces of the TFT substrate 2 where the terminal portions 8 are not formed, the three end surfaces of the CF substrate 1, and the outer surfaces of the regions corresponding to the three sides of the sealing material 3 are aligned on the same surface. Since the arrangement is made, the above-described collar portion is not formed. Therefore, the problem of the occurrence of electrolytic corrosion due to the liquid crystal staying in the heel can be solved.

  Note that the end surface of the CF substrate 1 is formed so that the end surface on the side where the terminal portion 8 is formed in the TFT substrate 2 is substantially the same as the outer surface of the sealing material 3 or the outer side by a minute width. Has been. This is because, after the TFT substrate 2 and the CF substrate 1 are bonded together, the portion of the CF substrate 1 corresponding to the region where the terminal portion 8 is formed is cut and deleted. That is, if the CF substrate 1 is cut together with the region where the sealing material 3 is formed in this region, the wiring on the TFT substrate 2 together with the sealing material 3 is peeled off when the CF substrate 1 is removed. There is a risk that. In order to prevent this, in the present embodiment, the end face of the CF substrate 1 is formed so as to be substantially the same as the outer face of the sealing material 3 or to be outside by a minute width. That is, since there are few or only very small ridges formed here, there is no problem due to the formation of the ridges as described above.

  Next, the manufacturing method of the liquid crystal display panel in this embodiment is demonstrated. FIG. 3A to FIG. 3C show a process until the TFT substrate 2 and the CF substrate 1 are bonded together and the liquid crystal is sealed. First, as shown in FIG. 3A, a sealing material 3 is formed on one surface of the CF substrate 1. It is assumed that the counter electrode, CF, BM, and the like are formed on the CF substrate 1 in advance.

  Here, the sealing material 3 is formed of a single material in a shape that completely surrounds the region in which the liquid crystal is sealed. In this embodiment, the sealing material 3 is formed as a square pattern. In addition, a pattern of the rectangular sealing material 3 is formed on the plurality of TFT substrates 2. In the example shown in the figure, the pattern of the quadrangular sealing material 3 is formed in an arrangement of 2 rows and 4 columns. The number of the patterns depends on the size of the CF substrate 1 and one CF substrate 1. It is appropriately determined according to the number of liquid crystal display panels 10 to be obtained.

  Next, as shown in FIG. 3 (b), in-cell spacers 7 A and outside-cell spacers 7 B are formed on the CF substrate 1. The in-cell spacers 7 </ b> A are spacers arranged in a region where liquid crystal is sealed by the sealing material 3, and are for maintaining the inter-substrate gap in the liquid crystal sealing region in the liquid crystal display panel 10. The in-cell spacer 7A is not necessarily provided.

  The outside-cell spacer 7B is a spacer arranged in a region where the sealing material 3 is not arranged out of a region to be cut in an end face forming step described later outside the region where the liquid crystal is sealed by the sealing material 3. It is. Although the details will be described later, the outside-cell spacer 7B is for suppressing the bending of the substrate in the region where the sealing material 3 is not disposed in the end face forming step.

  The inner cell spacers 7A and the outer cell spacers 7B are preferably constituted by photo spacers, but may be spherical spacers by fixed point scattering. Further, if the in-cell spacers 7A and the out-cell spacers 7B are formed at the same time, the number of steps can be reduced. However, these may be formed in separate steps.

  Further, as the outside-cell spacer 7B, in this embodiment, a columnar one having a diameter of 100 μm was used. This size is due to the fact that the cutting position accuracy of the wheel used in the end face forming step described later is about 100 μm. That is, it is preferable to set the diameter of the outer-cell spacer 7B and the width of the region where the sealing material 3 is formed to be approximately the same as or higher than the cutting position accuracy of the wheel. However, the diameter of the outer-cell spacer 7B and the width of the region where the sealing material 3 is formed are not limited to this size. Further, the shape of the outside-cell spacer 7B is not limited to a cylindrical shape, and may be, for example, a quadrangular prism shape or other cone shape.

  Next, as shown in FIG. 3C, a required amount of liquid crystal 4 is dropped by a syringe into each region surrounded by the sealing material 3, and the TFT substrate 2 is attached to the CF substrate 1 through the sealing material 3. . That is, liquid crystal is sealed in the gap between the CF substrate 1 and the TFT substrate 2 by a liquid crystal dropping and bonding method. It is assumed that TFT, pixel electrode, terminal portion 8, wiring, etc. are formed on the TFT substrate 2 in advance. Through the above steps, a bonded substrate in which the CF substrate 1 and the TFT substrate 2 are bonded together with the liquid crystal sealed is generated.

  Next, the bonded substrate is cut, and an end face forming step for separating the plurality of liquid crystal display panels 10 is performed. FIG. 1 shows a plan view of the bonded substrate. In the same figure, the broken line has shown the cutting line in an end surface formation process. As shown in the figure, at least a part of the end face of the liquid crystal display panel 10 is formed by cutting the CF substrate 1 and the TFT substrate 2 and the sealing material 3 in the region where the sealing material 3 is disposed. The

  More specifically, among the regions where the sealing material 3 is disposed, the CF substrate 1 and the TFT substrate 2 and the seals in the regions corresponding to the three sides of the TFT substrate 2 where the terminal portion 8 is not formed. The material 3 is cut. In the region corresponding to the three sides, it is preferable that the cutting is performed at a location that is substantially in the center with respect to the width of the region where the sealing material 3 is formed.

  Further, in the region where the sealing material 3 is disposed, the CF substrate 1 is cut in a region corresponding to one side of the TFT substrate 2 where the terminal portion 8 is formed. In the region corresponding to this one side, as described above, the cutting is performed so as to be substantially the same surface as the outer surface of the sealing material 3 or the outer side by a minute width. As described above, if the CF substrate 1 is cut together with the region where the sealing material 3 is formed in this region, the TFT substrate 2 together with the sealing material 3 is removed during the operation of removing the CF substrate 1. This is for preventing the upper wiring from being peeled off. For example, by setting the cutting line so as to be outside from the outer surface of the sealing material 3 by the position accuracy in the cutting process, the outer surface is substantially the same as the outer surface of the sealing material 3 or a minute width. Thus, cutting can be performed.

  In the present embodiment, the cutting process in the end face forming process is performed by a wheel having a rotary blade. The reason for this will be described below. As a method of cutting the glass substrate constituting the CF substrate 1 or the TFT substrate 2, two types of cutting methods using a wheel and a laser cutting method can be considered.

  Here, an experimental result of cutting the CF substrate 1 and the TFT substrate 2 with a laser is shown. FIG. 7 is a table showing experimental results of laser cutting when the substrate thicknesses of the CF substrate 1 and the TFT substrate 2 are changed in units of 0.1 mm between 0.1 mm and 0.5 mm. In the table, the numbers from 0.1 to 0.5 indicate the substrate thicknesses of the CF substrate 1 and the TFT substrate 2, and the unit is mm. In the same table, a circle indicates that the cutting has been performed well, a triangle indicates that the cutting has been performed, but the cutting state has been poor and cannot be used practically, and the cross indicates the cutting. The condition indicates that a completely bad cut was made. Note that, as the cutting condition, the experiment was performed by changing the laser output between 10 W and 200 W and changing the cutting speed between 100 mm / sec and 500 mm / sec. As shown in this result, it can be seen that when both the CF substrate 1 and the TFT substrate 2 have a substrate thickness of less than 0.3 mm, the laser cutting does not provide a good cutting state.

  On the other hand, when cutting with a wheel under conditions of a cutting pressure of 2 N to 8 N and a cutting speed of 30 mm / sec to 150 mm / sec, both CF substrate 1 and TFT substrate 2 are good even if the substrate thickness is less than 0.3 mm It was confirmed that it was possible to cut it. From the above experimental results, in this embodiment, the cutting process in the end face forming process is performed by a wheel having a rotary blade.

  However, when cutting with a wheel, as described above, when the wheel moves from a portion where the sealing material is disposed to a portion where the sealing material is not disposed (or vice versa), the scribe is caused by the bending of the substrate. Is not performed properly, and there is a possibility that cracks and chips may occur. On the other hand, in this embodiment, as described above, the outside-cell spacer 7B is disposed in a region where the sealing material 3 is not disposed in the region to be cut in the end face forming step.

  In FIG. 5, when cutting from the CF substrate 1 side by a wheel 31 as a rotary blade, the wheel 31 passes through a region where the seal material 3 is not formed between regions where the seal material 3 is formed. Indicates the state. As shown in the figure, in the area where the seal material 3 is not formed, the CF substrate 1 is not bent and the scribing is performed accurately by providing the outside-cell spacer 7B. Moreover, FIG. 6 has shown the state in case the area | region in which the sealing material is not formed becomes the edge part of a glass substrate. In this case, even if the wheel 31 approaches the area where the sealing material is not formed, the CF substrate 1 is not bent and the scribing is performed accurately by providing the outside-cell spacer 7B. 5 and 6 show a state where the CF / BM layer 22 is formed on the CF substrate 1.

  That is, in the region where the sealing material 3 is not disposed, the cutting is performed in the region where the outside-cell spacer 7B is disposed, so that the bending of the CF substrate 1 due to the pressing of the wheel 31 is suppressed. Become. Therefore, it is possible to accurately perform the cutting in the region where the sealing material 3 is not disposed without causing a crack or the like.

  In addition, about the parting, the break device which gives an impact along a scribe line was used.

  In this embodiment, assuming that the substrate thickness is less than 0.3 μm as the CF substrate 1 and the TFT substrate 2, the cutting with the wheel is performed as described above. In the case of using a substrate having a substrate thickness, laser cutting may be performed. In this case, the substrate does not bend due to the pressure of the wheel, so that the outside-cell spacer 7B may not be provided.

  In the above example, the sealing material 3 is formed in a square shape on the CF substrate 1 corresponding to each liquid crystal display panel 10, and the region where the sealing material 3 is formed is cut in the rear end face forming step. It has become. That is, the pattern of the sealing material 3 corresponding to each liquid crystal panel 10 is independent, and as shown in FIG. 1, the region between the patterns of the adjacent sealing material 3 is deleted as a dummy region after cutting. It will be. On the other hand, as shown in FIG. 2, each of the liquid crystal display panels 10 is formed by forming the sealing material 3 on the CF substrate 1 as a lattice pattern and cutting the center of the region where the sealing material 3 is formed. You may make it divide into. In this case, since the adjacent liquid crystal display panels 10 share one sealing material 3 formation region, no dummy region is generated. In this case, the utilization efficiency of the CF substrate 1 and the TFT substrate 2 can be improved.

  In the above example, the sealing material 3 is first formed on the CF substrate 1, but it may be formed on the TFT substrate 2 or may be formed and bonded to both.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims. That is, embodiments obtained by combining technical means appropriately changed within the scope of the claims are also included in the technical scope of the present invention.

  The liquid crystal display panel manufacturing method and the liquid crystal display panel according to the present invention can be applied to an active matrix type liquid crystal display panel using a TFT or the like, a passive matrix type liquid crystal display panel, or the like.

In the manufacturing method of the liquid crystal display panel which concerns on one Embodiment of this invention, it is a top view which shows the cut location in the bonding board | substrate with which CF substrate and TFT substrate were bonded together. In the manufacturing method of the liquid crystal display panel which concerns on one Embodiment of this invention, it is a top view which shows the other example of the state of the bonding board | substrate with which CF substrate and TFT substrate were bonded together. (A)-(c) is a perspective view which shows the process until it bonds a TFT substrate and CF board | substrate and encloses a liquid crystal. (A) is a plan view of the liquid crystal display panel, (b) is a side view of FIG. (A) when viewed from the side, and (c) is the same as (a). It is a side view when it sees from a downward direction. It is side surface sectional drawing which shows the state which the wheel has passed through the area | region where the sealing material is not formed between the area | regions in which the sealing material is formed when cut | disconnecting from the CF board | substrate side with the wheel as a rotary blade. It is side surface sectional drawing which shows a state in case the area | region in which the sealing material is not formed becomes the edge part of a glass substrate when cut | disconnecting from the CF board | substrate side with the wheel as a rotary blade. It is a table | surface which shows the experimental result of the cutting | disconnection by a laser at the time of changing the board | substrate thickness of CF board | substrate and TFT board | substrate in 0.1 mm unit between 0.1 mm-0.5 mm. (A)-(d) is a figure which shows the manufacturing process of the liquid crystal panel by the conventional vacuum injection method. It is a top view which shows the liquid crystal panel manufactured by the conventional vacuum injection method. In a conventional method for manufacturing a liquid crystal panel, when cutting from the CF substrate side by a wheel as a rotary blade, the wheel passes through a region where no sealing material is formed between regions where the sealing material is formed. It is side surface sectional drawing which shows a state. Side surface sectional drawing which shows the state when the area | region in which the sealing material is not formed becomes the edge part of a glass substrate when cut | disconnecting from the CF board | substrate side with the wheel as a rotary blade in the manufacturing method of the conventional liquid crystal panel It is.

Explanation of symbols

1 CF substrate (substrate)
2 TFT substrate (substrate)
3 Sealing material 4 Liquid crystal 7A Spacer inside cell 7B Spacer outside cell (spacer)
8 Terminal section 10 Liquid crystal display panel 21 Liquid crystal display area

Claims (11)

In a method of manufacturing a liquid crystal display panel in which two substrates are arranged to face each other and liquid crystal is sealed in a gap between the two substrates,
A sealing material forming step of forming a sealing material made of a single material in a shape completely surrounding the region enclosing the liquid crystal on at least one of the two substrates;
A liquid crystal sealing step of bonding the two substrates together in a state where the liquid crystal is sealed in a region surrounded by the sealing material;
And an end face forming step of forming at least a part of the end face of the liquid crystal display panel by cutting the two substrates and the seal material in a region where the seal material is disposed. A method for manufacturing a liquid crystal display panel.   2. The method of manufacturing a liquid crystal display panel according to claim 1, wherein the liquid crystal sealing step is a step of bonding the two substrates after the liquid crystal is dropped onto the substrate on which the sealing material is formed. . In the sealing material forming step, the sealing material is formed in a shape corresponding to four sides of a quadrangle,
2. The end face forming step, wherein the two substrates and the sealing material are cut in a region corresponding to the three sides among the regions where the sealing material is disposed. Liquid crystal display panel manufacturing method.   2. The method of manufacturing a liquid crystal display panel according to claim 1, wherein in the end face forming step, the two substrates and the sealing material are cut by a wheel having a rotary blade. In the end face forming step, when cutting is performed in the region where the sealing material is disposed, the region where the sealing material is not disposed due to the extension of the cutting is also cut,
A spacer that provides a spacer in at least a part of the gap between the two substrates in the region that is to be cut in the end surface forming step and in which the sealing material is not disposed before the end surface forming step. 5. The method of manufacturing a liquid crystal display panel according to claim 4, wherein an installation step is performed. In a method of manufacturing a liquid crystal display panel in which two substrates are arranged to face each other and liquid crystal is sealed in a gap between the two substrates,
A sealing material forming step of forming a sealing material enclosing the liquid crystal on at least one of the two substrates;
A liquid crystal sealing step of bonding the two substrates together in a state where the liquid crystal is sealed in a region surrounded by the sealing material;
An end face forming step of forming at least a part of the end face of the liquid crystal display panel by cutting the two substrates and the seal material with a wheel having a rotary blade in a region where the seal material is disposed; Including
In the end face forming step, when cutting is performed in the region where the sealing material is disposed, the region where the sealing material is not disposed due to the extension of the cutting is also cut,
A spacer that provides a spacer in at least a part of the gap between the two substrates in the region that is to be cut in the end surface forming step and in which the sealing material is not disposed before the end surface forming step. A method of manufacturing a liquid crystal display panel, wherein an installation step is performed.   The method for manufacturing a liquid crystal display panel according to claim 5 or 6, wherein, in the spacer installation step, a spacer is also installed in a region where the liquid crystal is sealed.   The liquid crystal display panel manufactured by the manufacturing method of the liquid crystal display panel as described in any one of Claims 1 thru | or 7. Two substrates disposed opposite each other;
Liquid crystal sandwiched in the gap between the two substrates,
A gap between the two substrates, and a sealing material formed of a single material in a shape that completely surrounds the region enclosing the liquid crystal,
The end surfaces of at least a part of the two substrates and at least a part of the outer surface of the sealing material opposite to the surface side in which the liquid crystal is sealed are arranged on the same surface. LCD panel.   In the surface on which both the end surfaces of at least a part of the two substrates and at least a part of the outer surface on the opposite side to the surface of the sealing material on the region side enclosing the liquid crystal are disposed, The liquid crystal display panel according to claim 9, wherein a spacer is provided in at least a part of a region where the sealing material is not disposed in a gap between the substrates. Two substrates disposed opposite each other;
Liquid crystal sandwiched in the gap between the two substrates,
A sealing material formed so as to enclose the liquid crystal in a gap between the two substrates;
The end surfaces of at least a part of the two substrates and at least a part of the outer surface on the opposite side to the surface on the region where the liquid crystal is sealed in the sealing material are disposed on the same surface,
In the surface on which both the end surfaces of at least a part of the two substrates and at least a part of the outer surface on the opposite side to the surface of the sealing material on the side of the liquid crystal are disposed, A liquid crystal display panel, wherein a spacer is provided in at least a part of a region where the sealing material is not disposed in a gap between two substrates.

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