JP2013242444A - Laminated substrate, display cell, display panel, display device, and method of manufacturing laminated substrate and display cell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminated substrate for a display cell, having an excellent effect of preventing the intrusion of foreign matter into a display cell from a display medium inlet.SOLUTION: In a laminated substrate 2 for a display cell, an inlet 42 without sealant 41 is provided between substrates 10 and 20, a portion of the inlet 42 in at least one substrate is provided with at least one projection member 71 so as to seal a part of the inlet 42, the distance between a the projection member 71 and the opposing substrate is shorter than the distance between the substrates 10 and 20 in an electrode formation part, and the sealant 41 on both sides of the inlet 42 is in contact with a part of at least one projection member.

Description

  The present invention relates to a bonded substrate for a display cell, a display cell including the bonded substrate, a display panel, a display device, and a method for manufacturing the bonded substrate and the display cell.

  A display cell in a display panel has a structure in which a layer made of a display medium such as a liquid crystal that performs display by optical modulation is sandwiched between a pair of substrates.

  In general, such a display cell is formed by injecting a display medium into a so-called empty cell composed of a pair of substrates bonded via a sealing material except for the injection hole of the display medium, and then sealing the injection hole. It is manufactured by sealing with a material (for example, see Patent Documents 1 to 4).

  However, in the above manufacturing method, when the display medium is injected into the empty cell, a minute foreign substance may be mixed from the injection port.

  When the foreign matter mixed from the injection port is a metal, there is a possibility that leakage occurs due to electrical connection between the substrates. At this time, if the display panel is normally white type, it becomes a flashing bright spot, and if it is normally black type, it becomes a flashing black spot.

  Even if the foreign matter is an organic substance, it causes a minute bright spot in a normally black display panel.

  However, since many jigs and tools such as cassettes and various devices are used in the display medium injection process, it is impossible to completely eliminate foreign substances.

  For this reason, various methods for preventing the entry of foreign matter from the inlet have been studied.

  FIG. 18 is a plan view showing a schematic configuration in the vicinity of the liquid crystal injection port in the liquid crystal cell described in Patent Document 1. As shown in FIG.

  As shown in FIG. 18, for example, in Patent Document 1, a protrusion member 302 that prevents entry of foreign matter is formed at a position where a liquid crystal injection port 301 is formed on one of a pair of substrates (not shown). It is disclosed that a liquid crystal injection port 301 is formed by applying a sealing material 303 to an outer periphery excluding a portion where the protruding member 302 is provided on the one substrate.

JP 2008-242150 A (released on October 9, 2008) JP 2001-183683 A (published July 6, 2001) JP 7-110489 A (published on April 25, 1995) JP-A-5-165040 (published on June 29, 1993)

  However, in Patent Document 1, as described above, since the liquid crystal injection port 301 is formed by applying the sealing material 303 to the outer periphery except the portion where the protruding member 302 is provided on the one substrate, the sealing is performed. A gap 304 exists between the material 303 and the protruding member 302.

  For this reason, as shown by a dotted line in FIG. 18, the foreign matter 305 contained in the liquid crystal flows along the sealing material 303 from the gap 304 when the liquid crystal is injected. For this reason, it cannot be said that the effect of preventing the entry of the foreign substance 305 into the liquid crystal cell is sufficient.

  Patent Document 2 discloses that a liquid crystal injection port of an empty panel used for the liquid crystal panel is provided with a protrusion for controlling the flow of liquid crystal material supplied into the empty panel. Patent Document 2 discloses that the protrusion is arranged so that the cross-sectional area of the flow path of the liquid crystal material that flows through the liquid crystal inlet and flows into the empty panel is smaller than the area of the inlet. However, it is not intended to prevent the intrusion of foreign matter, and there is a gap between the sealing material and the protrusion as in Patent Document 1.

  Also, Patent Document 3 discloses that a convex portion is formed in a region of a liquid crystal injection port on a transparent substrate in a liquid crystal display element. It is not effective in the injection process. In the sealing step of sealing the liquid crystal injection port with the sealing material after injecting the liquid crystal, the convex portion has a fixing strength of the sealing material for sealing the liquid crystal injection port in the direction of entering the liquid crystal injection port. In order to prevent air from entering from the outside of the element after sealing with a sealing material, thereby improving airtightness. When the transparent electrode is formed on the transparent substrate, the convex portion is formed of the same material as the transparent electrode at the same time as the transparent electrode. As shown in FIG. have. Therefore, as shown in FIG. 2 of Patent Document 3, the convex portion is lower in height and extremely thin than the surface of the alignment film provided on the transparent substrate on which the convex portion is formed. Therefore, it does not have the effect of preventing the intrusion of foreign matter.

  Further, Patent Document 4 is to prevent the entry of dust or ionic substances into the liquid crystal by washing the liquid crystal cell before injecting the liquid crystal into the liquid crystal cell.

  However, the method of Patent Document 4 can only remove foreign substances adhering to the liquid crystal cell before cleaning the liquid crystal cell. As described above, since many jigs and tools such as cassettes and various devices are used in the display medium injection process, it is impossible to completely eliminate foreign substances. For this reason, the method of Patent Document 4 is not a fundamental solution for preventing foreign substances from entering the liquid crystal cell.

  The present invention has been made in view of the above problems, and its purpose is to provide a display cell bonding substrate excellent in the effect of preventing entry of foreign matter from the display medium inlet into the display cell, and the bonding substrate. Another object is to provide a display cell, a display panel, a display device, and a method for manufacturing the bonded substrate and the display cell.

  In order to solve the above-described problems, a bonded substrate according to the present invention is a bonded substrate for a display cell in which a pair of substrates are bonded to each other with a sealing material at their edges, A display medium injection port not provided with the sealing material is provided between the substrates, and a part of the display medium injection port is formed in a portion of the display medium injection port of at least one of the pair of substrates. At least one protruding member is provided so as to be closed, and an electrode is provided on at least one of the pair of substrates, and the protruding member and a substrate facing the substrate provided with the protruding member Is shorter than the distance between the pair of substrates in the electrode forming portion, and the sealing material on both sides of the display medium injection port is in contact with a part of at least one protruding member. It is characterized by a door.

  Moreover, in order to solve said subject, the manufacturing method of the bonding board | substrate concerning this invention WHEREIN: A pair of board | substrate is mutually bonded by the sealing material in those edge parts, Between the said pair of board | substrates, the said sealing material Is provided with a display medium injection port, and an electrode is provided on at least one of the pair of substrates. A protruding member forming step of forming at least one protruding member at a portion of the display medium injection port in at least one substrate so as to block a part of the display medium injection port; and an edge of one of the pair of substrates Forming a projecting member, comprising: a sealing material forming step of forming a sealing material leaving a display medium inlet in a portion; and a substrate bonding step of bonding the pair of substrates through the sealing material The distance between the protruding member and the substrate facing the substrate provided with the protruding member is shorter than the distance between the pair of substrates in the electrode forming portion between the pair of substrates. The protruding member is formed so that the sealing material on both sides of the display medium inlet contacts a part of at least one protruding member.

  When there is a gap along the sealing material when sealing with the sealing material, the foreign matter contained in the display medium is stuck along the sealing material from the gap at the time of sealing when the display medium is injected. It becomes easy to flow into the substrate. The mixing of foreign matter into the display cell causes quality defects such as bright spots and black spots.

  For this reason, as described above, the sealing material on both sides of the display medium inlet and the projecting member are brought into contact with each other, and a projecting pattern by the projecting member is provided also at the time of sealing. Can be improved.

  Further, the protruding member is formed such that a distance between the protruding member and a substrate facing the substrate provided with the protruding member is shorter than a distance between the pair of substrates in the electrode forming portion. As a result, even if a metal is mixed in as a foreign substance from the display medium injection port that is not blocked by the protruding member, there is no possibility that leakage may occur due to an electrical connection between the substrates, or it is reduced.

  Therefore, according to each of the above-described configurations, a bonded substrate for a display cell, which has an excellent effect of preventing entry of foreign matter from the display medium inlet into the display cell and can produce a high-quality display panel and display device. And a method for manufacturing the same.

  Further, in the bonded substrate, the protruding member is arranged in a direction orthogonal to the display medium injection direction at the display medium injection port so that the sealing materials on both sides of the display medium injection port are in contact with different protruding members. However, it is preferable that a plurality of them are formed apart from each other.

  Therefore, in the projecting member forming step, a plurality of sealing materials on both sides of the display medium inlet are arranged in a direction perpendicular to the injection direction of the display medium at the display medium inlet so as to contact different projecting members. It is preferable that the protruding members are formed apart from each other.

  When the sealing material and the protruding member come into contact, the sealing material flows along the pattern of the protruding member depending on the type (viscosity) of the sealing material.

  Therefore, when the sealing material and the projecting member are brought into contact as described above, the display medium is injected into the display medium inlet so that the sealing materials on both sides of the display medium inlet are in contact with different projecting members. By forming the plurality of projecting members apart from each other in a direction orthogonal to the direction, the continuity between the sealing material and the projecting member can be cut off.

  Therefore, according to each of the above-described configurations, the sealing material by contact between the sealing material and the protruding member can be remarkably enhanced when sealing, as compared with the case where there is a gap along the sealing material. Flow can be prevented.

  Further, the plurality of protruding members are formed so as to be spaced apart from each other in the direction orthogonal to the injection direction of the display medium at the display medium injection port, thereby displaying the display at the display medium injection port in the sealing region by the sealing material. When there is a gap (opening) in a direction orthogonal to the medium injection direction, the protruding member is preferably formed at a position spaced apart from the ends of the pair of substrates at the display medium injection port.

  Therefore, in the protruding member forming step, it is preferable that the protruding member is formed at a position separated from the ends of the pair of substrates at the display medium inlet.

  According to each of the above configurations, the penetration of the sealing material is not disturbed, the sealing material penetrates uniformly and stably into the display medium inlet, and the sealing material does not contain bubbles, so that there is no sealing failure. Does not occur.

  In addition, the protruding member other than the protruding member that contacts the sealing material extends longer in the direction perpendicular to the injection direction of the display medium at the display medium inlet than the protruding member that contacts the sealing material. It is preferable that it contains.

  Therefore, in the projecting member forming step, the projecting member other than the projecting member that contacts the sealing material is perpendicular to the injection direction of the display medium at the display medium injection port, rather than the projecting member that contacts the sealing material. It is preferable that the protruding member is formed so as to include a protruding member extending long.

  According to the above configuration, the continuity between the sealing material and the protruding member is cut off in the vicinity of the sealing material, while the protruding member that does not contact the sealing material extends in a direction orthogonal to the display medium injection direction at the display medium injection port. By forming a continuous projection pattern, the projection pattern has a higher foreign substance intrusion effect than when the projection pattern has a plurality of gaps (openings) in a direction orthogonal to the display medium injection direction at the display medium injection port. While being able to obtain, a sealant flow can be prevented.

  In the bonded substrate, the protruding member extends in a direction orthogonal to the display medium injection direction at the display medium injection port, and the sealing material on both sides of the display medium injection port includes the protrusion. The member is in contact with each end of the member in the direction perpendicular to the injection direction of the display medium at the display medium inlet, and the seal member is brought into contact with the end of the protruding member by contact with the protruding member. It is preferable that a concave portion that blocks the flow of water is formed.

  Therefore, in the projecting member forming step, the projecting members are arranged so that the end portions of the projecting member in the direction perpendicular to the injection direction of the display medium at the display medium inlet are on both sides of the display medium inlet. And extending in a direction orthogonal to the injection direction of the display medium at the display medium injection port so as to come into contact with each of the sealing materials, and at the respective end portions of the protruding member, It is preferable to form a recess that blocks the flow of the sealing material by contact.

  Further, in this case, in the projecting member forming step, the end portions of the projecting member have a portion that does not contact the sealing material on the downstream side in the display medium injection direction of the display medium injection port. It is preferable to form the protruding member and to form the concave portion in a portion of the protruding member including a portion that does not contact the sealing material.

  As described above, when the recess is formed in the projecting member, when the projecting member is brought into contact with the seal material, the seal material that has flowed by the contact flows into the recess and stays in the recess. Can be blocked.

  At this time, by forming the concave portion in a portion where the protruding member contacts the sealing material, a seal flow in a direction perpendicular to the injection direction of the display medium at the display medium injection port can be prevented. By forming the concave portion in a portion including a portion not in contact with the sealing material, a seal flow toward the display region side can be prevented.

  In the bonded substrate, the protruding member extends in a direction orthogonal to the display medium injection direction at the display medium injection port, and the sealing material on both sides of the display medium injection port includes the protrusion. The member is in contact with each end of the display medium injection port in the direction perpendicular to the display medium injection direction, and the projecting member of the display medium injection port on the downstream side of the display medium injection direction of the display medium In addition, a recess may be formed to block the flow of the sealing material by contact with the protruding member.

  In this case, in the projecting member forming step, the projecting member is formed so that the respective end portions of the projecting member are located in the sealing region by the sealing material, and the display medium inlet in the projecting member is formed. The recess is formed at the downstream end of the display medium in the injection direction.

  Also in this case, when the protruding member is brought into contact with the sealing material, the sealing material that has flowed by the contact flows into the concave portion and stays in the concave portion, so that the sealing material can be blocked from flowing. The seal flow toward the display area side can be prevented.

  In addition, the projection member is formed so that the respective end portions of the projection member are located in the sealing region by the sealing material, thereby orthogonal to the injection direction of the display medium at the display medium inlet. When there is no gap (opening) in the direction, the protruding member is preferably formed at the end of the substrate at the display medium inlet.

  Therefore, in this case, in the projecting member forming step, the projecting member is preferably formed at the end portions of the pair of substrates at the display medium inlet.

  According to each of the above configurations, there is no gap (opening) in the direction orthogonal to the injection direction of the display medium at the display medium injection port, and the projection pattern by the projection member is flat. Even if the protruding member is provided in the portion, the penetration of the sealing material is not inhibited, and stable penetration can be performed.

  Further, in this case, since the protruding member is provided at the end of the substrate, the gap of the entire display medium injection port portion is narrow and faces the protruding member and the substrate on which the protruding member is provided. Foreign matter having a size larger than the gap between the substrates does not enter the bonded substrate. For this reason, invasion of a foreign substance can be prevented outside the bonded substrate.

  The distance between the protruding member and the substrate facing the substrate provided with the protruding member is preferably set to be equal to or less than a value obtained by subtracting 1 μm from the cell thickness between the pair of substrates. In the projecting member forming step, a distance between the projecting member and a substrate facing the substrate on which the projecting member is provided is equal to or less than a value obtained by subtracting 1 μm from a cell thickness between the pair of substrates. It is preferable to form the protruding member.

  Furthermore, the distance between the protruding member and the substrate facing the substrate provided with the protruding member is preferably set to 70% or less of the cell thickness between the pair of substrates. In the projecting member forming step, the projecting member is set such that a distance between the projecting member and a substrate facing the substrate provided with the projecting member is 70% or less of a cell thickness between the pair of substrates. Is preferably formed.

  According to each of the above configurations, the distance between the protruding member and the substrate facing the substrate on which the protruding member is provided can be shorter than the distance between the pair of substrates in the electrode forming portion. . For this reason, according to each of the above-described configurations, even if a metal is mixed as a foreign substance from the display medium injection port that is not blocked by the protruding member, there is no possibility that leakage occurs due to electrical connection between the substrates. Or reduced.

  The display cell according to the present invention is characterized in that a display medium is sealed in the bonded substrate according to the present invention, and the display medium inlet is sealed with a sealing material.

  Therefore, the method for manufacturing a display cell according to the present invention includes a step of injecting a display medium from the display medium injection port into the bonded substrate obtained by the method for manufacturing a bonded substrate according to the present invention described above, And a step of sealing the display medium inlet with a sealing material.

  For this reason, according to each of the above-described configurations, a display cell that is excellent in the effect of preventing foreign matter from entering the display cell through the display medium inlet and that can manufacture a high-quality display panel and display device, and a method for manufacturing the display cell. Can be provided.

  A display panel according to the present invention includes the display cell according to the present invention. A display device according to the present invention includes the display cell according to the present invention.

  For this reason, the display panel and the display device can provide a high-quality display panel and display device since the invasion of foreign matter from the display medium inlet into the display cell is much less than in the past.

  According to the bonded substrate, the display cell, the display panel, the display device of the present invention, and the method for manufacturing the bonded substrate and the display cell, in the portion of the display medium inlet in at least one of the pair of substrates, At least one projecting member is formed so as to block a part of the display medium injection port, and the distance between the projecting member and the substrate opposite to the substrate provided with the projecting member is The protrusion member is formed so that the sealant is shorter than the distance between the pair of substrates and the sealing material on both sides of the display medium inlet contacts a part of at least one protrusion member.

  For this reason, a projection pattern by the projection member is also provided when sealing with the sealing material, and since there is no gap along the sealing material when sealing, as in the past, Highly effective in preventing foreign objects from entering.

  Further, the protruding member is formed such that a distance between the protruding member and a substrate facing the substrate provided with the protruding member is shorter than a distance between the pair of substrates in the electrode forming portion. As a result, even if a metal is mixed in as a foreign substance from the display medium injection port that is not blocked by the protruding member, there is no possibility that leakage may occur due to an electrical connection between the substrates, or it is reduced.

  For this reason, it is possible to suppress / prevent quality defects such as bright spots and black spots due to the inclusion of foreign matter in the display cells.

  Therefore, according to the present invention, a bonded substrate for a display cell excellent in the effect of preventing the entry of foreign matter from the display medium inlet into the display cell, a display cell including the bonded substrate, a display panel, a display device, In addition, a method for manufacturing the bonded substrate and the display cell can be provided.

(A) is sectional drawing which shows schematic structure of the bonding board | substrate concerning Embodiment 1 of this invention, (b) is a plane which shows schematic structure of the injection hole vicinity in the bonding board | substrate shown to (a). FIG. (A) is sectional drawing which shows schematic structure of the principal part of the display cell which comprises a display panel in the display apparatus concerning Embodiment 1 of this invention, (b) is a display cell shown to (a). It is a top view which shows schematic structure of the principal part. It is a graph which shows the relationship between the size of each foreign material in the foreign material mixed in the bonding board | substrate in the display panel of a model with a cell thickness of 4.7 micrometers, and the ratio for which the foreign material of each size accounts. It is a top view which shows schematic structure of the injection hole of this display cell when the projection member of the same pattern as patent document 1 is provided in the display cell shown to (a) * (b) of FIG. It is a top view which shows schematic structure of the injection hole vicinity in the bonding board | substrate used for the comparison which has a clearance gap at the time of sealing. It is a top view which shows schematic structure of the injection hole vicinity in the other bonded substrate used for the comparison which has a clearance gap at the time of sealing. It is a top view which shows schematic structure of the injection hole vicinity in the bonding board | substrate concerning Embodiment 2 of this invention. It is a top view which shows schematic structure of the injection hole vicinity in the other bonding substrate used for the comparison which has a clearance gap at the time of sealing. It is a top view which shows an example of schematic structure of the injection port vicinity when the projection member formed in the injection port part is made to contact the sealing material of the both sides of an injection port. It is a top view which shows schematic structure of the injection port vicinity of the display cell concerning the modification 1 in Embodiment 2 of this invention. It is a top view which shows schematic structure of the injection port vicinity of the display cell concerning the modification 2 in Embodiment 2 of this invention. It is a top view which shows schematic structure of the injection hole vicinity in the display cell concerning Embodiment 3 of this invention. It is a top view which shows schematic structure of the injection hole vicinity in the display cell concerning Embodiment 4 of this invention. It is sectional drawing which shows schematic structure of the injection hole vicinity in the bonding board | substrate concerning Embodiment 4 of this invention. FIG. 14 is a plan view showing a flow of the sealing material when the protruding member shown in FIG. 13 is not formed with a notch including a recess and the protruding member is brought into contact with the sealing material. FIG. 14 is a plan view showing how the sealing material flows when the protruding member shown in FIG. 13 is brought into contact with the sealing material. It is a top view which shows schematic structure of the principal part of the injection hole vicinity in the display cell concerning Embodiment 5 of this invention. 6 is a plan view showing a schematic configuration in the vicinity of a liquid crystal injection port in a liquid crystal cell described in Patent Document 1.

  Hereinafter, embodiments of the present invention will be described in detail.

[Embodiment 1]
An embodiment according to the present invention will be described with reference to FIGS. 1A and 1B to FIG.

<Schematic configuration of display device>
FIG. 2A is a cross-sectional view showing a schematic configuration of a main part of the display cell 1 constituting the display panel in the display device according to the present embodiment, and FIG. It is a top view which shows schematic structure of the principal part of 1. FIG.

  The display device according to the present embodiment includes a display panel, a drive circuit (not shown) that drives the display panel, and an illumination device such as a backlight that emits light to the display panel as necessary. . Note that the configurations of the drive circuit and the illumination device are the same as those of the prior art. Therefore, illustration and description of these drive circuits and lighting devices are omitted.

  Further, the display panel includes a display cell 1 shown in FIGS. 1A and 1B and a polarizing plate and a retardation plate (not shown) as necessary. For example, when the display panel is a liquid crystal panel, a polarizing plate is bonded to the outside of the display cell 1. In addition, a retardation plate is bonded between the display cell 1 and the polarizing plate as necessary. In addition, the structure of these polarizing plates and phase difference plates is the same as the conventional one. Therefore, illustration and description of these polarizing plates and retardation plates are also omitted.

  In addition, the display method and driving method of the display device and display panel according to the present embodiment are not particularly limited, and the display device and display panel according to the present embodiment include a TN (Twisted Nematic) mode, Examples include display devices and display panels that use various display methods such as MVA (Multi-domain Vertical Alignment) mode, IPS (In-Plain Switching) mode, OCB (Optically Compensated Birefringence) mode, and FFS (Fringe Field Switching) mode. .

<Schematic configuration of display cell 1>
Next, a schematic configuration of the display cell 1 will be described.

  As shown in FIGS. 2A and 2B, the display cell 1 includes a pair of substrates 10 and 20, a display medium 30, a sealing material 41, a sealing material 51, and a spacer 61 (in FIG. 1). (See (a)).

  The substrates 10 and 20 are arranged to face each other, and the display medium 30 is sandwiched between the substrates 10 and 20.

  The display medium 30 is used as an optical modulation layer that performs display by optical modulation. Examples of the display medium 30 include, but are not limited to, a liquid crystal, an organic EL (electroluminescence) element, a dielectric liquid, an electrochromic, and the like.

  These substrates 10 and 20 are bonded to each other by a sealing material 41 at their edges. The sealing material 41 is provided at the edge between the substrates 10 and 20 along the outer periphery of the substrates 10 and 20, and is displayed in the gap between the substrates 10 and 20 surrounded by the sealing material 41. Medium 30 is injected.

  As shown in FIGS. 2A and 2B, the sealing material 41 is provided on the edge of the substrates 10 and 20 in an open curve shape except for the inlet 42 (display medium inlet) of the display medium 30. It has been. Thereby, the injection port 42 not provided with the sealing material 41 is provided between the substrates 10 and 20, and the sealing material 51 is provided so as to close the injection port 42.

  Further, a spacer 61 is provided between the substrates 10 and 20 to keep the gap between the substrates 10 and 20 at a certain size. The spacer 61 may be columnar or spherical.

  Various conventionally known spacers can be used for the spacer 61. Similarly, the material and the forming method of the sealing material 41 and the sealing material 51 are the same as the conventional one. Therefore, the description thereof is omitted here.

  The substrates 10 and 20 are bonded to each other by aligning and overlapping each other and curing the sealing material 41.

  The display cell 1 injects the display medium 30 into the bonded substrate 2 (empty cell) composed of the pair of substrates 10 and 20 bonded together through the sealing material 41 except for the injection port 42 of the display medium 30 in this way. Thereafter, the injection port 42 is manufactured by sealing with a sealing material 51.

<Schematic configuration of bonded substrate 2>
Next, a schematic configuration of the bonded substrate 2 will be described.

  1A is a cross-sectional view illustrating a schematic configuration of the bonded substrate 2, and FIG. 1B is a plan view illustrating a schematic configuration in the vicinity of the inlet 42 in the bonded substrate 2.

  As the substrates 10 and 20 constituting the bonded substrate 2, for example, an array substrate such as a TFT (thin film transistor) substrate or a counter substrate such as a color filter substrate is used.

  The configuration of the substrates 10 and 20 other than the portion of the injection port 42 is the same as the conventional one. As the substrates 10 and 20, a known array substrate and counter substrate can be used.

  1A shows an example in which an array substrate is used as the substrate 10 on the back side when viewed from the observer, and a counter substrate is provided on the substrate 20 on the observer side that is on the display surface side. However, the arrangement of the substrate 10 and the substrate 20 may be reversed.

  As shown in FIG. 1A, the substrate 10 includes an insulating substrate 11 such as a glass substrate. Similarly, the substrate 20 includes an insulating substrate 21 such as a glass substrate. Needless to say, if the substrate on the display surface side has a light-transmitting property, the substrate on the back surface side may not have a light-transmitting property.

  The substrate 10 includes, for example, a driving element (switching element) such as a TFT (not shown), a signal wiring (not shown) such as a gate signal line and a data signal line, and an interlayer insulating film 12 covering the driving element and the signal wiring on the insulating substrate 11. And an insulating film such as a gate insulating film (not shown), a pixel electrode (not shown), and an alignment film (not shown) as necessary.

  On the other hand, the substrate 20 has a color filter 22, a black matrix 23, a common electrode 24 (counter electrode) made of a transparent electrode such as ITO (indium tin oxide), an alignment film (not shown) if necessary, etc. Is provided.

  A black matrix 23 is formed in an area other than the pixel area on the substrate 20. In FIG. 1A, the black matrix 23 in the frame area is indicated by a black matrix 23a, and the black matrix 23 in the pixel area (display area) is indicated by a black matrix 23b.

  Between the substrates 10 and 20, a first spacer 61a and a second spacer 61b are arranged as spacers 61 for maintaining a gap between the substrates 10 and 20 at a constant size. The substrate 10 and the substrate 20 are held by a first spacer 61a arranged in the frame region and a second spacer 61b arranged in the display region.

  In FIG. 1A, the case where the common electrode 24 is provided on the substrate 20 which is the counter substrate is illustrated as an example, but the configuration of the substrates 10 and 20 is limited to this. is not. As described above, the display method (driving method) of the display device and the display panel according to the present embodiment is not particularly limited, and the substrates 10 and 20 are substantially the same as the substrate such as the IPS mode and the FFS mode. You may have a structure suitable for the display system using a parallel horizontal electric field. That is, the substrates 10 and 20 may have a configuration in which the pixel electrode and the common electrode are provided on the same substrate. For example, when the substrate 10 is an array substrate, an electrode may be provided only on the substrate 10, and electrodes for applying a lateral electric field may be provided on the substrates 10 and 20, respectively. The substrate 10 may be provided with first and second electrodes for applying a lateral electric field, while the substrate 20 may be provided with a third electrode.

  In addition, at least one projection member 71 that prevents entry of foreign matter is provided at a portion of the inlet 42 of at least one of the substrates 10 and 20 so as to block a part of the inlet 42. Yes. In FIGS. 1A and 1B and FIGS. 2A and 2B, a plate-like protruding member 71 joined to the substrate 20 at one end face is formed on the substrate 10. -The case where it hangs down plurally between 20 is mentioned as an example.

<Protruding member 71>
Next, the protruding member 71 will be described in more detail.

(Configuration of the protruding member 71)
As shown in FIGS. 1B and 2A and 2B, the sealing material 41 has a terminal portion that terminates toward one peripheral edge of the substrates 10 and 20. That is, the sealing material 41 is parallel to the edge of the substrates 10 and 20, and a frame-like portion 41 a that is partially opened, and extends from the frame-like portion 41 a toward the edge of the substrates 10 and 20. And an inlet forming portion 41b (terminal portion).

  When viewed from the normal direction of the substrate, that is, in a plan view, the protruding member 71 is an injection direction of the display medium 30 at the injection port 42 (a direction indicated by an arrow X in FIG. ”) (In FIG. 1B, the direction indicated by the arrow Y, hereinafter referred to as“ Y ”direction). The sealing material 41, that is, the inlet forming portion 41 b in the sealing material 41 is in contact.

  In the example shown in FIGS. 1A and 1B, the sealing material 41 on both sides of the injection port 42 is extended in the Y direction so as to contact the respective end portions in the Y direction of the protruding members 71. A plurality of protruding members 71 are provided in a stripe shape in the X direction.

  In FIG. 1B and FIG. 2A and FIG. 2B, the number of the protruding members 71 is omitted for convenience of illustration, but the number of the protruding members 71 is particularly limited. It is not something.

  The protruding member 71 is provided on at least one of the substrates 10 and 20. Between the protruding member 71 and the substrate opposite to the substrate on which the protruding member 71 is provided (FIG. As shown in a), a gap (gap d1) is provided.

  In the present embodiment, the display medium 30 is injected between the substrates 10 and 20 in the bonded substrate 2 through the gap d1.

  According to the present embodiment, as described above, by providing the protruding member 71 at the injection port 42 in the bonded substrate 2, it is possible to suppress entry of foreign matter from the injection port 42 into the bonded substrate 2. it can.

  As described with reference to FIG. 18, if there is a gap between the sealing material and the projecting member, foreign matter is likely to enter. This is because when there is a gap along the seal material between the seal material and the projecting member, particularly when sealing with the seal material, the foreign matter contained in the display medium is injected into the display medium when the display medium is injected. This is because it becomes easy to flow into the bonded substrate along the sealing material from the gap at the time of sealing. The mixing of foreign matter into the display cell causes quality defects such as bright spots and black spots.

  For this reason, as shown in FIG. 1B or the like, the projection pattern by the projection member 71 is put on the sealing material 41, and the sealing material 41 of the inlet forming portion 41b and the projection member 71 are brought into contact with each other when sealing. Also, by providing the projection pattern, it is possible to improve the effect of preventing foreign substances from entering. Thereby, a high quality display panel and display device can be manufactured.

(Material of protruding member 71)
The material of the protruding member 71 is not particularly limited, but the same material as the spacer 61 such as a photo spacer material can be used. Thereby, the protrusion member 71 can be formed simultaneously with the spacer 61 when the spacer 61 is formed.

  Further, as the material of the protruding member 71, for example, the same material as the color material of the color filter 22 such as acrylic resin may be used. In this case, the protruding member 71 may be formed simultaneously with the spacer 61 when the color filter 22 is formed.

(Relationship between the size of the gap between the protruding member 71 and the inlet 42)
In the present embodiment, as an example, the case where the protruding member 71 is provided on the substrate 20 is illustrated as an example. However, the protruding member 71 may be provided on the substrate 10, for example, The protrusion members 71 may be alternately provided on the substrate 10 and the substrate 20.

  In the bonded substrate board 2, the gap between the injection ports 42 not blocked by the projecting member 71 is larger than the distance between the substrates 10 and 20 in the electrode forming part (minimum part gap, hereinafter referred to as “gap d11”). It is formed to be shorter. For this reason, in this Embodiment, the protrusion member 71 is formed so that the clearance gap d1 may become shorter than the clearance gap d11.

  In the process of injecting the display medium 30 into the bonded substrate 2, many jigs and tools such as cassettes and various devices are generally used. For this reason, as described above, by eliminating the gap at the time of sealing with the sealing material 41, it is possible to greatly suppress the entry of foreign matter from the inlet 42 into the bonded substrate 2, but the foreign matter is completely mixed. It is no exaggeration to say that it is impossible to lose.

  However, as described above, the gap of the injection port 42 not blocked by the projecting member 71 is formed so as to be shorter than the gap d11, so that metal is mixed as a foreign substance from the injection port 42. However, there is no possibility that leakage occurs due to electrical connection between the substrates 10 and 20.

  The gap d1 is preferably set to be equal to or less than a value obtained by subtracting 1 μm from the cell thickness d12 (cell gap) between the substrates 10 and 20.

  The gap d1 is preferably set to 70% or less of the cell thickness d12 (cell gap) between the substrates 10 and 20.

  Note that the gap d11 in the bonded substrate 2 of the display panel of the cell thickness d12 = 4.7 μm is 3.8 μm, and the gap d11 in the bonded substrate 2 of the display panel of the cell thickness d12 = 3.0 μm is 2.1 μm.

  Therefore, for example, in a model having a cell thickness d12 = 4.7 μm, the gap d1 is 3.7 μm or less obtained by subtracting 1 μm from the cell thickness d12, or 3.3 μm or less (3.29 μm) which is 70% of the cell thickness d12. Or less).

  In consideration of these results, the gap d1 is preferably set to 3 μm or less in a model having a cell thickness d12 = 4.7 μm.

  FIG. 3 is a graph showing the relationship between the size of each foreign substance and the proportion of the foreign substance of each size in the foreign substance mixed in the bonded substrate in the display panel of the model having a cell thickness of d12 = 4.7 μm. .

  As shown in FIG. 3, the particle size of the foreign matter mixed in the bonded substrate is distributed around 4 to 5 μm, and by setting it to 3 μm or less, 95% of the foreign matter to be removed can be supplemented. Become.

(Relationship between substrate edge at injection port 42 and arrangement of protruding member 71)
As shown in FIGS. 1A and 1B and the like, in this embodiment, the protruding member 71 is formed at a position spaced apart from the ends (substrate edges) of the substrates 10 and 20 at the injection port 42. ing.

  The reason for this will be described below with reference to FIG. FIG. 4 is a plan view showing a schematic configuration of the inlet 42 of the display cell 1 when the display cell 1 is provided with the protruding member 71 having the same pattern as that of Patent Document 1. Here, a problem different from the prevention of entry of the foreign matter 305 in the liquid crystal cell described in Patent Document 1 will be described.

  In Patent Document 1, a large first mother substrate for a TFT substrate and a second mother substrate for a CF (color filter) substrate are bonded together, and then divided into individual liquid crystal cells.

  In Patent Document 1, a protruding member 302 is also provided on the dividing edges of the first and second mother substrates, that is, the substrate edges.

  However, as shown in FIG. 4, when there is a gap in the sealing region by the sealing material 51, particularly in the Y direction at the injection port 42, the protruding members 71 are also arranged on the substrate edges of the substrates 10 and 20 at the injection port 42. Then, dispersion occurs in the penetration of the sealing material 51 into the injection port 42, and stable penetration cannot be performed. Further, it is easy to bite the bubbles, for example, bubbles remain in the stepped portion 81 between the substrate edge and the protruding member 71. For this reason, defective sealing occurs.

  For this reason, when there is a gap in the sealing region by the sealing material 51, the sealing region by the sealing material 51, specifically, the minimum permeation region of the sealing material 51 is projected to the substrate edge. It is desirable not to form a pattern.

  For this reason, in the present embodiment, the protruding member 71 is formed at a position separated from the substrate edge in the injection port 42, specifically, a position separated from the permeation region of the sealing material 51. Thereby, the penetration of the sealing material 51 is not disturbed, the sealing material 51 penetrates uniformly and stably into the inlet 42, and the sealing material 51 does not contain bubbles, so that no sealing failure occurs.

  In addition, it is sufficient if the distance d51 between the substrate edge of the substrates 10 and 20 and the protruding member 71 at the injection port 42 shown in FIG. 1B is 50 μm or more.

<Laminated substrate 2, display cell 1, display panel, and manufacturing method of display device>
Next, an example of a method for manufacturing a display panel according to this embodiment will be described.

  In the following description, as shown in FIG. 1A, a case where the protruding member 71 is formed on the counter substrate will be described as an example. However, the protruding member 71 may be formed on the array substrate. Further, the protruding members 71 may be formed on the array substrate by shifting the positions.

  The counter substrate is manufactured by forming a black matrix 23 made of a light-shielding material on the insulating substrate 21 and then forming a color filter 22, a common electrode 24, and a spacer 61 made of a photo spacer in the display region. .

  In the present embodiment, at the time of forming the spacer 61 (or color filter 22), for example, by changing the mask pattern used in photolithography, the spacer 61 (or color filter 22) is formed in the display region, A protruding member 71 is formed on the counter substrate in the region where the injection port 42 is to be formed using the same material as the spacer 61 (or the color filter 22).

  At this time, in the above process (projection member forming process), a part of the projection member 71 on the application area of the seal material 41 so that the seal material 41 on both sides of the injection port 42 contacts a part of the projection member 71. The protrusion member 71 is formed so as to be positioned, and the protrusion member 71 is formed at a position spaced apart from the ends of the substrates 10 and 20 at the injection port 42.

  At this time, the projection member 71 is set so that the gap d1 of the injection port 42 not blocked by the projection member 71 is shorter than the gap d11 between the substrates 10 and 20, which is the minimum inter-substrate distance. Form.

  For example, in the above process, the distance (gap d1) between the protruding member 71 and the substrate facing the substrate on which the protruding member 71 is provided is 1 μm less than the cell thickness d12 between the substrates 10 and 20. The protruding member 71 is formed so as to be less than or equal to the value. Alternatively, the protruding member 71 is formed so that the gap d1 is 70% or less of the cell thickness between the substrates 10 and 20.

  On the other hand, an array substrate provided with drive elements, signal wirings, an interlayer insulating film 12 covering these drive elements and signal wirings, pixel electrodes, and the like on the insulating substrate 11 is manufactured in the same manner as in the past.

  The array substrate and the counter substrate may be manufactured as a large mother substrate, or may be divided into individual substrates.

  Next, the sealing material 41 is applied to the edge of one of the array substrate and the counter substrate, leaving a portion that becomes the injection port 42 (sealing material forming step). At this time, the sealing material 41 is applied so as to be in direct contact with the protruding member 71 or to overlap a part of the protruding member 71 when the array substrate and the counter substrate are overlapped.

  As the sealing material 41, a known material such as an ultraviolet curable resin, a thermosetting resin, an ultraviolet ray, and a thermosetting resin can be used.

  For the application of the sealing material 41, various conventionally known methods such as screen printing and pattern drawing using a seal dispenser device can be used.

  The array substrate and the counter substrate formed in this manner are aligned, overlapped with each other, and bonded to each other via the sealing material 41 by curing the sealing material 41 by ultraviolet irradiation or heating (substrate bonding) Combining step).

  Thereby, the bonded substrate 2 in which the injection port 42 is formed between the array substrate and the counter substrate, that is, between the substrates 10 and 20, is obtained by the terminal portion of the sealing material 41.

  Then, after injecting the display medium 30 into the bonded substrate 2 from the injection port 42, the injection cell 42 is sealed with a sealing material 51, whereby the display cell 1 is manufactured.

  For example, when the display medium 30 is a liquid crystal in the display cell 1, a display panel is manufactured by disposing a polarizing plate or the like outside the display cell 1. Further, the display panel is manufactured by mounting a drive circuit, a power supply circuit, and a backlight or the like in the case of a transmissive type, for example.

<Verification of foreign substance intrusion prevention effect>
Next, regarding the intrusion prevention effect in the display cell 1 obtained in this way, the intrusion prevention effect of foreign matter using the projection member 71 having the plan view pattern shown in FIG. 1B, FIG. 5 and FIG. The results of comparative verification of the differences are shown below.

  FIG. 5 and FIG. 6 are plan views each showing a schematic configuration in the vicinity of the inlet 42 in the bonded substrate 2 used for comparison, which has a gap at the time of sealing.

  In the following description, the gap (distance in the Z direction, which is the normal direction of the substrate) between the protruding member 71 and the substrate on which the protruding member 71 is provided is d1, and the inlet 42 The gap between the centers of the sealing materials 41 is d21. Further, the height (length in the Z direction) of the protruding member 71 is d31, the length in the X direction of the protruding member 71 is d32, and the length of the protruding member 71 in the Y direction is d33. In addition, the pitch (center distance) between the protrusion members 71 adjacent in the X direction is d41, and the pitch (center distance) between the protrusion members 71 adjacent in the Y direction when the protrusion members 71 adjacent in the Y direction are present. d42. The distance between the substrate edge of the substrates 10 and 20 at the injection port 42 and the most upstream projection member 71 in the display medium injection direction at the injection port 42 (distance in the X direction) is d51.

  In the above verification, the same conditions were used except that the pattern of the projection member 71 in plan view was changed as shown in FIG. 1 (b), FIG. 5, and FIG. Therefore, in all of FIGS. 1A and 1B, FIG. 5 and FIG. 6, d1 = 2.4 μm, d11 = 3.8 μm, d12 = 4.7 μm, d21 = 5 mm, d31 = 4. The thickness was 35 μm. Further, the same photospacer material was used for the projecting member 71.

  In FIG. 1A, d32 = 50 μm, d33 = 4.6 mm, d41 = 217 μm, and d51 = 417 μm. In FIG. 5, d32 = d33 = 50 μm, d41 = d42 = 217 μm, and d51 = 417 μm. In FIG. 6, d32 = 50 μm, d33 = 3.9 mm, d41 = 217 μm, and d51 = 417 μm.

  For the above verification, a panel inspection device was used, the bright spot occurrence locations were marked by lighting inspection, and the number of occurrences was counted. In the verification, three display cells under the same conditions were prepared, and the average number of foreign particles entering and the injection rate were used.

  In addition, on the basis of the average injection | pouring speed | rate of the display medium 30 in the bonding substrate 2 using the projection member 71 which has the planar view pattern shown in FIG. The average injection speed of the display medium 30 in the bonded substrate 2 using the protruding member 71 having the planar view pattern shown took 1.6 times as long.

  Further, assuming that the average number of invading foreign substances in the bonded substrate 2 using the projecting member 71 having the plan view pattern shown in FIG. 5 is 1, the projecting member 71 having the plan view pattern shown in FIG. The average number of intruding foreign substances (the number relative to the above reference) in the bonded substrate 2 using 0.5 is 0.56, and the bonded substrate 2 using the protruding member 71 having a plan view pattern shown in FIG. The average number of invading foreign bodies (the number relative to the above standard) was 0 (zero).

  From the above results, it is understood that the foreign matter intrusion prevention effect is remarkably improved by eliminating the gap at the time of sealing as shown in the present embodiment.

[Embodiment 2]
The following will describe another embodiment of the present invention with reference to FIGS.

  In the following description, differences from the first embodiment will be mainly described, and components having the same functions as the components described in the first embodiment are denoted by the same reference numerals. The description is omitted.

<Schematic configuration of bonded substrate 2>
FIG. 7 is a plan view showing a schematic configuration in the vicinity of the inlet 42 in the bonded substrate 2 according to the present embodiment.

  The bonded substrate 2 in the display cell 1 according to the present embodiment is the same as the bonded substrate 2 according to the first embodiment, except that the pattern of the projection member 71 in plan view is changed as shown in FIG. is there.

  As shown in FIG. 7, the bonded substrate 2 according to the present embodiment includes a plurality of small pieces having a predetermined height so that the sealing materials 41 on both sides of the injection port 42 are in contact with different projecting members 71. A plurality of projecting (rod-shaped) projecting members 71 are formed apart from each other in the X direction and the Y direction.

  In the present embodiment, the protruding members 71 adjacent in the X direction are formed so as to be displaced from each other in the Y direction. That is, the row of the protrusion members 71 arranged in the Y direction (hereinafter referred to as “protrusion row”) is the first protrusion sequentially from the injection port 42 side (that is, the injection medium 42 in the injection direction of the display medium 30). Assuming that the row 71L1, the second projection row 71L2, the third projection row 71L3, the fourth projection row 71L4, and the fifth projection row 71L5, for example, the second projection row 71L1 has a second gap between the projection members 71 adjacent in the Y direction. Each protrusion member 71 is formed so that the protrusion member 71 in the protrusion row 71L2 is positioned. Similarly, the protrusion member 71 in the third protrusion row 71L3 is positioned between the protrusion members 71 adjacent in the Y direction in the second protrusion row 71L2.

  Thereby, the protrusion members 71 adjacent in the X direction are arranged in a staggered manner in the X direction. For this reason, the display medium 30 that has collided with the projection member 71 of each projection row is branched by the projection member 71, proceeds in a zigzag manner, and is injected into the bonded substrate 2.

  Also in this embodiment, in the bonded substrate board 2, the gap d1 in the Z direction (see FIG. 1A) is formed to be shorter than the gap d11 (see FIG. 1A). The

  However, in the present embodiment, a gap also exists between the protruding members 71 adjacent in the Y direction. For this reason, it is desirable that the gap between the protruding members 71 adjacent in the Y direction is also shorter than the gap d11. The gap between the protruding members 71 adjacent in the Y direction can be easily calculated by d42− (d33 / 2 × 2).

  In this embodiment, the protruding member 71 may be provided on the substrate 20 or may be provided on the substrate 10. Further, the protruding members 71 may be alternately provided on the substrate 10 and the substrate 20.

<Verification of foreign substance intrusion prevention effect>
Next, regarding the intrusion prevention effect in the display cell 1 provided with the projection member 71 having the plan view pattern shown in FIG. 7, foreign matter intrusion prevention using the projection member 71 having the plan view pattern shown in FIGS. The results of comparative verification of the difference in effect are shown below.

  FIG. 8 is a plan view showing a schematic configuration in the vicinity of the injection port in the bonded substrate 2 used for comparison, which has a gap at the time of sealing.

  In the verification, the same conditions were used except that the pattern of the projection member 71 in plan view was changed as shown in FIGS. 5, 7, and 8. Therefore, in all of FIGS. 5, 7, and 8, d1 = 2.4 μm, d11 = 3.8 μm, d12 = 4.7 μm, d21 = 5 mm, and d31 = 4.35 μm. Further, the same photospacer material was used for the projecting member 71.

  7 and 8, d32 = d33 = 50 μm, d41 = d42 = 72.5 μm, and d51 = 417 μm. That is, the gap between the protruding members 71 adjacent in the Y direction was 22.5 μm.

  The conditions in FIG. 5 are as described in the first embodiment, and the verification apparatus and the verification method are the same as those in the first embodiment.

  As a result, when the average number of invading foreign substances in the bonded substrate 2 using the projecting member 71 having the plan view pattern shown in FIG. 5 is defined as 1, the projecting member having the plan view pattern shown in FIG. The average number of invading foreign substances in the bonded substrate 2 using 71 is 1.08, and the average number of invading foreign substances in the bonded substrate 2 using the projection member 71 having the plan view pattern shown in FIG. .6.

<Effect>
As described above, from the verification results when the projection patterns shown in FIGS. 5, 7, and 8 are used, the foreign matter intrusion prevention effect is remarkably improved by eliminating the gap at the time of sealing in this embodiment as well. I understand that.

  However, from the comparison between the verification result shown in Embodiment 1 and the above verification result, the gap in the Y direction in the protrusion pattern is eliminated as shown in FIG. It can be seen that a higher foreign matter intrusion preventing effect can be obtained as compared with the case where the pattern has a plurality of gaps (openings) in the Y direction.

  However, as shown in FIG. 7, the display medium 30 in the bonded substrate 2 using the projecting member 71 having the plan view pattern shown in FIG. 5 is present due to a gap serving as a flow path of the display medium 30 in the Y direction. The average injection rate of the display medium 30 in the bonded substrate 2 using the projection member 71 having the plan view pattern shown in FIGS. 7 and 8 is 1 The injection is completed in a shorter time than the average injection speed of the display medium 30 in the bonded substrate 2 using the protruding member 71 having the planar view pattern shown in FIG. There is.

  In the above verification, the gap between the protruding members 71 adjacent in the Y direction was set to 22.5 μm as described above for comparison with the protruding pattern shown in FIG. From the above verification results, according to the present embodiment, it is possible to obtain a large foreign matter intrusion prevention effect even when such a gap as described above exists between the protruding members 71 adjacent in the Y direction. I understand. However, it is desirable that the gap of the injection port 42 not blocked by the protruding member 71 is formed to be shorter than the gap d11. From the above verification, there is no gap between the protruding members 71 adjacent in the Y direction. As can be seen from the fact that the foreign matter intrusion prevention effect is higher in the case where there is no foreign matter, by forming the gap between the projection members 71 adjacent in the Y direction to be shorter than the gap d11 in the projection pattern shown in FIG. The intrusion prevention effect can be further improved.

  Incidentally, in Patent Document 1, by using the protruding member 71 having a plan view pattern as shown in FIG. 8, the flow path of liquid crystal injection becomes long, and even if dust such as metal pieces is mixed in the liquid crystal, It is disclosed that intrusion is prevented in the middle of the elongated flow path, and foreign matter does not enter.

  However, as can be seen from the above verification results, it is not possible to increase the effect of preventing the intrusion of foreign matter only by lengthening the flow path. By using the protruding member 71 having a plan view pattern as shown in FIG. Compared with the case where the projection member 71 having the planar view pattern shown in FIG.

  However, according to the present embodiment, by using the protruding member 71 having a plan view pattern as shown in FIG. 7, an effect unique to the present embodiment, which is different from the effect of preventing the entry of foreign matter, can be obtained. Hereinafter, this effect will be described.

  FIG. 9 is a plan view showing an example of a schematic configuration in the vicinity of the injection port 42 when the protruding member 71 is brought into contact with the sealing material 41 on both sides of the injection port 42.

  As shown in FIG. 9, when the sealing material 41 and the protruding member 71 come into contact with each other, the sealing material 41 flows along the pattern of the protruding member 71 depending on the type (viscosity) of the sealing material 41.

  For this reason, when the sealing material 41 and the projecting member 71 are brought into contact with each other, the opening of the projecting pattern formed by the projecting member 71 is partially provided so that the continuity between the sealing material 41 and the projecting member 71 is cut off. Can be stopped (prevented).

  That is, according to the present embodiment, a plurality of protruding members 71 are formed apart from each other in the Y direction so that the sealing materials 41 on both sides of the injection port 42 are in contact with different protruding members 71, respectively. Since the protruding member 71 is also arranged at the time of sealing, the foreign substance intrusion effect can be remarkably enhanced as compared with the case where there is a gap along the sealing material 41 at the time of sealing. Seal material flow due to contact with the member 71 can be prevented.

<Modification 1>
FIG. 10 is a plan view showing a schematic configuration in the vicinity of the inlet 42 in the display cell 1 according to this modification.

  In this modification as well, as shown in FIG. 10, like the first embodiment and the bonded substrate 2 shown in FIG. 7, the protruding member 71 is connected to the inlet so that the protruding member 71 does not contact the sealing material 51. 42 is formed at a position separated from the substrate edge, specifically, at a position separated from the permeation region of the sealing material 51.

  The projection pattern according to this modification is different from the projection pattern shown in FIG. 7 in that projection members 71 adjacent in the X direction are arranged in a straight line in the X direction. That is, in this modification, the plurality of projecting members 71 are arranged in a matrix in the X direction and the Y direction.

  Also in this case, a plurality of projecting members 71 are formed apart from each other in the Y direction so that the sealing materials 41 on both sides of the injection port 42 are in contact with different projecting members 71, so that when sealing, Compared with the case where there is a gap along the sealing material 41, the foreign substance intrusion effect can be remarkably enhanced, and the flow of the sealing material due to the contact between the sealing material 41 and the protruding member 71 can be prevented.

  In this modification, as an example, the protrusion rows composed of the protrusion members 71 arranged in the Y direction are provided from the first protrusion row 71L1 to the sixth protrusion row 71L6 as shown in FIG. Are shown. However, the number of protrusion rows is not particularly limited.

<Modification 2>
FIG. 11 is a plan view showing a schematic configuration in the vicinity of the inlet 42 in the display cell 1 according to this modification.

  In this modification, as shown in FIG. 11, the protruding members 71 adjacent in the X direction are arranged in a staggered manner in the X direction, and among the first protruding row 71L1 to the sixth protruding row 71L6, the X direction Are different from the projection pattern shown in the first modification in that the odd-numbered projection rows and the even-numbered projection rows adjacent to each other are in contact with each other so as to form a pair.

  That is, in this modification, the first protrusion row 71L1 and the second protrusion row 71L2 are in contact with each other, and the third protrusion row 71L3 and the fourth protrusion row 71L4, the fifth protrusion row 71L5, and the sixth protrusion row 71L6. Are in contact.

  Also in this case, the sealing material 41 on both sides of the injection port 42 is in contact with different protruding members 71, and in each protruding row composed of protruding members 71 arranged in the Y direction, each protruding member 71 is: The projections in the Y direction are spaced apart from each other in the Y direction, and there are openings (that is, regions where the projection members 71 are not provided in the Y direction). For this reason, it is possible to remarkably enhance the foreign substance intrusion effect as compared with the case where there is a gap along the sealing material 41 at the time of sealing, and to prevent the flow of the sealing material due to the contact between the sealing material 41 and the protruding member 71. be able to.

[Embodiment 3]
The following will describe still another embodiment of the present invention with reference to FIG.

  In the following description, differences from the first and second embodiments are mainly described, and the same components as those described in the first and second embodiments have the same functions. A number is assigned and description thereof is omitted.

<Schematic configuration of bonded substrate 2>
FIG. 12 is a plan view showing a schematic configuration in the vicinity of the inlet 42 in the display cell 1 according to the present embodiment.

  The bonded substrate 2 in the display cell 1 according to the present embodiment is the same as the bonded substrate 2 according to the first and second embodiments, except that the pattern of the projection member 71 in plan view is changed as shown in FIG. The same.

  As shown in FIG. 12, the bonded substrate 2 according to the present embodiment includes a plurality of protrusions having a predetermined height so that the sealing materials 41 on both sides of the injection port 42 are in contact with different protrusion members 71, respectively. A plurality of members 71 are formed apart from each other in the X direction and the Y direction.

  However, in the projection pattern according to the present embodiment, the projection member 71 other than the projection member 71 that contacts the seal material 41 is longer than the projection member 71 that contacts the seal material 41 in the Y direction. To 71a3.

  As shown in FIG. 12, the projection pattern according to the present embodiment has four types of projection members 71a1 to 71a3 and 71b, and each projection row composed of projection members 71 arranged in the Y direction. Each of the first projection row 71L1 to the third projection row 71L3 has two types of projection members 71 having different lengths in the Y direction. The first protrusion row 71L1 to the third protrusion row 71L3 sandwich the protrusion members 71a1 to 71a3 extending in the Y direction longer than the protrusion member 71b contacting the seal material 41, respectively. A protruding member 71b having a shorter length in the Y direction than 71a3 is provided.

  In FIG. 12, as described above, the first protrusion row 71L1 to the third protrusion row 71L3 each have two types of protrusion members 71 having different lengths in the Y direction. The first protrusion row 71L1 to the third protrusion row 71L3 may include three or more types of protrusion members 71 having different lengths in the Y direction.

<Effect>
As described in the second embodiment, by eliminating gaps in the Y direction in the projection pattern, it is possible to prevent foreign matters from entering, compared to the case where the projection pattern has a plurality of gaps (openings) in the Y direction. An effect can be obtained.

  Therefore, as shown in FIG. 12, the first protrusion row 71L1 to the third protrusion row 71L3 forming the protrusion pattern in the Y direction are partially provided in the vicinity of the seal material 41 so that the seal material 41 and the protrusion member 71 As shown in the second embodiment, the protruding member 71 that does not contact the sealing material 41 is extended in the Y direction to form a continuous pattern that does not have a gap (opening) in the Y direction while cutting off the continuity. In addition, a higher foreign substance intrusion effect can be obtained than when the protrusion pattern has a plurality of gaps (openings) in the Y direction, and the seal material flow can be prevented.

  According to the present embodiment, when the same verification as in the first and second embodiments is performed based on the verification results described in the first and second embodiments, the average foreign object intrusion due to the protrusion pattern in the first embodiment It is obvious that a value between the value of the number and the average value of the number of entering foreign objects by the protrusion pattern in the second embodiment can be obtained.

  In the present embodiment also, in the bonded substrate board 2, the gap d1 (see FIG. 1A) is formed to be shorter than the gap d11 (see FIG. 1A). However, as described above, it is desirable that the gap of the injection port 42 not blocked by the protruding member 71 is formed to be shorter than the gap d11. For this reason, also in this embodiment, it is desirable that the protruding member 71 is formed so that both d1 and d42 are shorter than the gap d11. In addition, the gap between the protruding member 71 in contact with the sealing material 41 and the protruding member 71 adjacent to the protruding member 71 in the Y direction is larger than the protruding member from the viewpoint of the foreign matter intrusion preventing effect described above. It is desirable that the distance between the 71 and 71 is kept to a minimum size.

  Also in this embodiment, as shown in FIG. 12, like the bonded substrate 2 shown in the first and second embodiments, the protruding member 71 is connected to the inlet so that the protruding member 71 does not contact the sealing material 51. It is desirable to form at a position away from the substrate edge in 42, specifically at a position away from the permeation region of the sealing material 51.

  Also in this embodiment, the protruding member 71 may be provided on the substrate 20 or may be provided on the substrate 10. Further, the protruding members 71 may be alternately provided on the substrate 10 and the substrate 20.

[Embodiment 4]
The following will describe still another embodiment of the present invention with reference to FIGS.

  In the following description, differences from the first to third embodiments will be mainly described, and the same components as those described in the first to third embodiments have the same functions. A number is assigned and description thereof is omitted.

<Schematic configuration of bonded substrate 2>
FIG. 13 is a plan view showing a schematic configuration in the vicinity of the injection port 42 in the display cell 1 according to the present embodiment, and FIG. 14 shows a schematic configuration in the vicinity of the injection port 42 in the bonded substrate 2 according to the present embodiment. FIG.

  The bonded substrate 2 in the display cell 1 according to the present embodiment is the same as the bonded substrate 2 according to the first to third embodiments, except that the pattern of the projection member 71 in plan view is changed as shown in FIG. The same.

  As shown in FIG. 13 and FIG. 14, the bonded substrate 2 according to the present embodiment has a sealing material 51 in a plan view so as to block a part of the inlet 42 in the inlet 42 part. Only one block-like projecting member 71 (solid projecting member 71 in plan view) having a predetermined height is provided to cover the entire sealing region.

  FIG. 14 shows an example in which the protruding member 71 joined to the substrate 20 at one end surface is suspended between the substrates 10 and 20, but the protruding member 71 is disposed on the substrate 10 side. It may be provided. That is, the protruding member 71 may be erected on the surface of the substrate 10. In any case, it goes without saying that the gap d1 (see FIG. 1A) is shorter than the gap d11 (see FIG. 1A).

  As shown in FIG. 13, the protruding member 71 extends in the Y direction in plan view, and a part of the protruding member 71 forms the sealing material 41 on both sides of the injection port 42, that is, the injection port formation in the sealing material 41. It is in contact with the portion 41b. In other words, the sealing material 41 on both sides of the inlet 42 is in contact with both ends of the protruding member 71 in the Y direction.

  Further, in the present embodiment, as shown in FIGS. 13 and 14, the protruding member 71 is formed up to the substrate edge at the inlet 42.

  According to the present embodiment, as described above, the projection member 71 covers the entire sealing region by the sealing material 51 in plan view, so that the pattern is flat and the projection member is formed on the substrate edge. Even if 71 is provided, the penetration of the sealing material 51 is not inhibited, and stable penetration can be performed.

  In addition, according to the present embodiment, since the protruding member 71 that covers the entire sealing region in a plan view is provided on the substrate edge in the injection port 42 in this way, the gap in the entire injection port 42 portion is formed. The foreign material 305 that is narrow and has a size larger than the gap d1 does not enter the bonded substrate 2. For this reason, as shown in FIG. 14, intrusion of the foreign material 305 can be prevented outside the bonded substrate 2.

  Moreover, the protrusion pattern concerning this Embodiment does not have a clearance gap in the Y direction like the protrusion pattern shown in FIG. For this reason, according to this Embodiment, the high foreign-material intrusion prevention effect can be acquired.

  In the present embodiment, each end portion in the Y direction of the projecting member 71 (that is, an end surface parallel to the X direction in the projecting member 71) is partially cut out. A recess 72 a that blocks the flow of the sealing material 41 due to the contact between the protruding member 71 and the sealing material 41 is formed in the notched portion 72.

  In the present embodiment, both end portions in the Y direction of the protruding member 71 have non-contact regions 73 that do not contact the sealing material 41 on the downstream side of the injection port 42 in the display medium injection direction (X direction). The protrusion member 71 is formed on the surface. The recess 72 a (notch portion 72) is formed in a portion including the non-contact region 73 in the protruding member 71.

  In the present embodiment, as shown in FIG. 13, the recess 72 a is provided at the boundary portion between the frame-like portion 41 a of the sealing material 41 and the inlet forming portion 41 b on the end surface of the protruding member 71 parallel to the X direction. In addition, the length of the end surface on the downstream side in the X direction from the concave portion 72a is such that the length in the Y direction of the protruding member 71 in the portion is the Y direction of the protruding member 71 in the portion on the upstream side in the X direction from the concave portion 72a. Notched to be shorter than the length of.

  In the present embodiment, the protruding member 71 is formed so that a contact portion and a non-contact portion with the sealing material 41 exist on each end face of the protruding member 71 parallel to the Y direction.

  Specifically, both end portions in the Y direction of the protruding member 71 have non-contact areas 73 that do not contact the sealing material 41 on the downstream side of the injection port 42 in the injection direction (X direction) of the display medium 30. The protruding member 71 is formed. The recess 72 a (notch portion 72) is formed in a portion including the non-contact region 73 in the protruding member 71.

  In the present embodiment, as shown in FIG. 13, the recess 72 a is provided at the boundary portion between the frame-like portion 41 a and the inlet forming portion 41 b in the sealing material 41.

  The notch 72 and the recess 72a (notch pattern) can be easily formed by changing the mask pattern used in photolithography when the protruding member 71 is formed.

<Effects of the above notches>
Here, the difference in the flow of the sealing material 41 between the case where the cutout portion 72 including the recess 72a is formed and the case where the cutout portion 72 is not formed as described above will be described with reference to FIGS. 15 and 16. In the following description, it is assumed that the sealing material 41 has fluidity.

  FIG. 15 shows the flow of the sealing material 41 when the protruding member 71 is brought into contact with the sealing material 41 when the protruding member 71 shown in FIG. FIG. 16 is a plan view showing how the sealing material 41 flows when the protruding member 71 shown in FIG. 13 is brought into contact with the sealing material 41.

  Here, “when the protruding member 71 is brought into contact with the sealing material 41” means, for example, when the sealing material 41 is applied to the substrate 20 provided with the protruding member 71 or when the protruding member 71 is provided. Is brought into contact with the substrate 10 provided with the sealing material 41.

  As shown in FIG. 15, when the recess 72a is not formed in the protruding member 71, when the protruding member 71 is brought into contact with the sealing material 41, the sealing material 41 flows toward the display area along the protruding pattern.

  On the other hand, when the recess 72a is formed in the protruding member 71 as shown in FIG. 16, when the protruding member 71 is brought into contact with the sealing material 41, the flowed sealing material 41 flows into the recessed portion 72a and stays in the recessed portion 72a. Thus, the flow of the sealing material 41 can be blocked.

  For this reason, according to this Embodiment, it can prevent that the sealing material 41 flows into the display area side by providing the recessed part 72a in the projection member 71 as mentioned above.

  At this time, as described above, the notched portion 72 is formed in the protruding member 71 so as to include the concave portion 72 a, so that the distance between the protruding member 71 and the sealing material 41 in the non-contact region 73. Can be increased. As a result, the sealing material 41 that has flowed into the concave portion 72a contacts and is connected to the sealing material 41 in the sealing region, so that the sealing material 41 does not flow downstream in the X direction from the concave portion 72a. It can prevent more reliably that it flows to the display area side.

  However, it suffices that the end face parallel to the X direction of the protruding member 71 is provided with a recess 72a, and a portion of the end face on the downstream side of the recess 72a in the X direction is the Y of the protruding member 71 in this part. It is not always necessary to cut out the length in the direction so as to be shorter than the length in the Y direction of the protruding member 71 in the portion upstream of the recess 72a in the X direction. The end face parallel to the X direction of the protruding member 71 may be formed flush with the exception of the recess 72a.

  Further, the size of the recess 72a is not particularly limited as long as the seal member 41 that has flowed due to the contact between the protruding member 71 and the seal member 41 is formed in a size that can be retained in the recess 72a. .

  As described above, in the present embodiment, in the protruding member forming step, each end portion in the Y direction (end surface parallel to the X direction) of the protruding member 71 is a portion that does not contact the sealing material 41 on the downstream side in the X direction. The projecting member 71 is formed so as to have the (non-contact region 73), and the recess 72a is formed in a portion of the projecting member 71 including the non-contact region 73 on the downstream side in the direction in which the sealing material 41 flows. Form.

  At this time, if the concave portion 72a is formed in the portion that contacts the sealing material 41, the seal flow in the Y direction is prevented. By forming the concave portion 72a in the portion including the non-contact region 73, the seal flow toward the display region side is prevented. Is prevented.

[Embodiment 5]
The following will describe still another embodiment of the present invention with reference to FIG.

  In the following description, differences from the fourth embodiment will be mainly described, and components having the same functions as the components described in the first to fourth embodiments are denoted by the same reference numerals. A description thereof will be omitted.

<Schematic configuration of bonded substrate 2>
FIG. 17 is a plan view showing a schematic configuration of a main part in the vicinity of the inlet 42 in the display cell 1 according to the present embodiment. In FIG. 17, illustration is omitted except for a part of the protruding member 71 and the sealing material 41.

  In the present embodiment, as shown in FIG. 17, each end portion in the Y direction (end surface parallel to the X direction) of the projecting member 71 is within the seal region by the seal material 41 (specifically, the seal material 41 The protrusion member 71 is formed so as to be located in the injection port forming portion 41b of the protrusion member 71, and the recess 72a is formed as the notch portion 70 at the downstream end of the protrusion member 71 in the X direction (that is, the Y in the protrusion member 71). Of the end faces parallel to the direction, the display face side end face is located on the downstream side in the X direction. Other configurations are the same as those in the fourth embodiment.

  As described above, also in the present embodiment, the concave portion that blocks the flow of the sealing material 41 due to the contact between the projecting member 71 and the sealing material 41 in the downstream portion of the projecting member 71 in the direction in which the sealing material 41 flows. By forming 72a, a seal flow toward the display area can be prevented.

  In particular, as described above, when the end surface parallel to the X direction of the protrusion member 71 is in contact with the sealing material 41 over the entire X direction, the protrusion is connected to the end surface of the protrusion member 71 parallel to the X direction. A seal material flow is generated along an end surface of the member 71 parallel to the Y direction.

  Therefore, in this case, as shown in FIG. 17, the sealing material is brought into contact with the projecting member 71 and the sealing material 41 on the end surface parallel to the Y direction of the projecting member 71 on the downstream side in the flow direction of the sealing material 41. By forming the recess 72a that blocks the flow of 41, the seal flow toward the display area can be prevented.

  Even in the present embodiment, the size of the concave portion 72a is not particularly limited as long as the sealing material 41 that has flowed due to the contact between the protruding member 71 and the sealing material 41 can be retained in the concave portion 72a. It is not limited.

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

  The bonded substrate of the present invention is excellent in the effect of preventing entry of foreign matter from the display medium inlet into the display cell, and is suitably used as a bonded substrate for a display cell constituting a display panel in a display device such as a liquid crystal display device. Can be used.

DESCRIPTION OF SYMBOLS 1 Display cell 2 Bonding board | substrate 10 Board | substrate 11 Insulation board | substrate 12 Interlayer insulation film 20 Board | substrate 21 Insulation board | substrate 22 Color filter 23, 23a, 23b Black matrix 24 Common electrode 30 Display medium 41 Sealing material 41a Frame-shaped part 41b Inlet formation part 42 Inlet 51 Sealing material 61 Spacer 61a First spacer 61b Second spacer 71 Projection member 71L1 First projection row 71L2 Second projection row 71L3 Third projection row 71L4 Fourth projection row 71L5 Fifth projection row 71L6 Sixth projection Row 71a1, 71a2, 71a3 Projection member 71b Projection member 72a Concave portion 73 Non-contact region 81 Stepped portion 305 Foreign matter

Claims (23)

A pair of substrates is a bonded substrate for a display cell, which is bonded to each other by a sealing material at their edges,
Between the pair of substrates, a display medium injection port not provided with the sealing material is provided,
At least one projection member is provided in a portion of the display medium injection port in at least one of the pair of substrates so as to block a part of the display medium injection port,
An electrode is provided on at least one of the pair of substrates, and the distance between the protruding member and the substrate facing the substrate provided with the protruding member is determined by the pair of electrodes in the electrode forming portion. Shorter than the distance between the substrates, and
A bonded substrate, wherein the sealing material on both sides of the display medium inlet is in contact with a part of at least one protruding member.   A plurality of protruding members are formed apart from each other in a direction perpendicular to the injection direction of the display medium at the display medium inlet so that the sealing materials on both sides of the display medium inlet are in contact with different protruding members. The bonded substrate according to claim 1, wherein the bonded substrate board is formed.   The bonded substrate according to claim 2, wherein the protruding member is formed at a position spaced apart from the ends of the pair of substrates at the display medium inlet.   The protruding members other than the protruding member that contacts the sealing material include a protruding member that extends longer in the direction perpendicular to the injection direction of the display medium at the display medium injection port than the protruding member that contacts the sealing material. The bonded substrate according to claim 2 or 3, wherein The projecting member extends in a direction perpendicular to the injection direction of the display medium at the display medium injection port,
The sealing material on both sides of the display medium inlet is in contact with each end of the projecting member in a direction perpendicular to the direction of injection of the display medium at the display medium inlet,
The bonded substrate according to claim 1, wherein a concave portion is formed at each of the end portions of the protruding member to block the flow of the sealing material due to contact with the protruding member. The projecting member extends in a direction perpendicular to the injection direction of the display medium at the display medium injection port,
The sealing material on both sides of the display medium inlet is in contact with each end of the projecting member in a direction perpendicular to the direction of injection of the display medium at the display medium inlet,
A concave portion for blocking the flow of the sealing material due to contact with the projection member is formed at an end of the projection member on the downstream side in the injection direction of the display medium at the display medium inlet. The laminated substrate according to claim 1.   The bonded substrate according to claim 5 or 6, wherein the protruding member is formed at an end of the substrate in the display medium inlet.   The distance between the protruding member and the substrate facing the substrate provided with the protruding member is set to be equal to or less than a value obtained by subtracting 1 μm from the cell thickness between the pair of substrates. Item 8. The bonded substrate according to any one of items 1 to 7.   The distance between the protruding member and the substrate facing the substrate on which the protruding member is provided is set to 70% or less of the cell thickness between the pair of substrates. 8. The laminated substrate according to any one of 7 above. A display medium is sealed in the bonded substrate according to any one of claims 1 to 9,
A display cell, wherein the display medium inlet is sealed with a sealing material.   A display panel comprising the display cell according to claim 10.   A display device comprising the display cell according to claim 10. A pair of substrates are bonded to each other by a sealing material at their edges, a display medium injection port without the sealing material is provided between the pair of substrates, and at least one of the pair of substrates A method for producing a bonded substrate for a display cell, in which an electrode is provided,
A projecting member forming step of forming at least one projecting member at a portion of the display medium injection port in at least one of the pair of substrates so as to block a part of the display medium injection port;
A sealing material forming step of forming a sealing material leaving a display medium inlet at the edge of one of the pair of substrates;
Including a substrate laminating step of laminating the pair of substrates via the sealing material,
In the protruding member forming step, the distance between the protruding member and the substrate facing the substrate on which the protruding member is provided is greater than the distance between the pair of substrates in the electrode forming portion between the pair of substrates. And the protruding member is formed so that the sealing material on both sides of the display medium inlet is in contact with a part of at least one protruding member.   In the protruding member forming step, a plurality of protruding members are arranged in a direction orthogonal to the injection direction of the display medium at the display medium inlet so that the sealing materials on both sides of the display medium inlet are in contact with different protruding members. The method for producing a bonded substrate according to claim 13, wherein the substrates are formed apart from each other.   The method for producing a bonded substrate according to claim 14, wherein, in the projecting member forming step, the projecting member is formed at a position spaced apart from the ends of the pair of substrates at the display medium inlet. .   In the projecting member forming step, projecting members other than the projecting member that contacts the sealing material extend longer in the direction perpendicular to the injection direction of the display medium at the display medium inlet than the projecting member that contacts the sealing material. The method for manufacturing a bonded substrate according to claim 14, wherein the protruding member is formed so as to include the protruding member provided. In the protruding member forming step,
The projecting member is arranged so that the end portions of the projecting member in the direction perpendicular to the injection direction of the display medium at the display medium inlet are in contact with the sealing materials on both sides of the display medium inlet, respectively. While extending in the direction perpendicular to the injection direction of the display medium at the display medium injection port,
The method for manufacturing a bonded substrate according to claim 13, wherein a recess is formed at each of the end portions of the protruding member to block the flow of the sealing material by contact with the protruding member. In the protruding member forming step,
The protruding member is formed so that each end of the protruding member has a portion that does not contact the sealing material on the downstream side in the display medium injection direction at the display medium injection port.
The method for producing a bonded substrate according to claim 17, wherein the recess is formed in a portion of the protruding member including a portion that does not contact the sealing material. In the protruding member forming step,
Forming the protruding member such that the respective end portions of the protruding member are located within a sealing region by the sealing material;
The method for manufacturing a bonded substrate according to claim 17, wherein the concave portion is formed at an end of the protruding member on the downstream side in the injection direction of the display medium at the display medium inlet.   The method for manufacturing a bonded substrate according to claim 18 or 19, wherein, in the protruding member forming step, the protruding member is formed at an end of the pair of substrates at the display medium inlet.   In the projecting member forming step, a distance between the projecting member and a substrate facing the substrate on which the projecting member is provided is equal to or less than a value obtained by subtracting 1 μm from a cell thickness between the pair of substrates. The method for producing a bonded substrate according to any one of claims 13 to 20, wherein the protruding member is formed.   In the projecting member forming step, the projecting member is set such that a distance between the projecting member and a substrate facing the substrate provided with the projecting member is 70% or less of a cell thickness between the pair of substrates. The method for producing a bonded substrate according to any one of claims 13 to 20, wherein: is formed. Injecting a display medium from the display medium inlet into the bonded substrate obtained by the method for manufacturing a bonded substrate according to any one of claims 13 to 22,
And a step of sealing the display medium inlet with a sealing material.