JP2009047758A - Liquid crystal display panel and method for manufacturing liquid crystal display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display panel and a method for manufacturing a liquid crystal display panel with a high production yield. <P>SOLUTION: The liquid crystal display panel comprises an array substrate 10 having a display region R1 and an upper structure, a counter substrate 20 having a display region, a sealing material 60 formed over the whole circumference of an overlapped region R2 and joining the array substrate and the counter substrate, and a liquid crystal layer. The upper structure has a recess portion 6 in the uppermost position in the overlapped region R2 and caving from the counter substrate 20 side to the array substrate 10 side. The sealing material 60 is partially housed in the recess portion 6. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a liquid crystal display panel and a method for manufacturing a liquid crystal display panel.

  Liquid crystal display panels are used in the field of information equipment centered on computers and the field of video equipment centered on televisions. In general, a liquid crystal display panel includes an array substrate, a counter substrate, and a liquid crystal layer sandwiched between the two substrates. The array substrate and the counter substrate have a display area. Between the array substrate and the counter substrate, for example, a plurality of columnar spacers are arranged as a plurality of spacers, and a gap between the two substrates is kept constant. The array substrate and the counter substrate are joined by a rectangular frame-shaped sealing material disposed outside the display area of both substrates.

  The sealing material is applied by a dispenser method. In this case, a liquid crystal inlet is formed in the sealing material. Then, the peripheral portions of the array substrate and the counter substrate are bonded together by this sealing material. Thereafter, the sealing material is heated and cured to fix the array substrate and the counter substrate. Next, liquid crystal is injected into the region surrounded by the array substrate, the counter substrate, and the sealing material from a liquid crystal injection port by a vacuum injection method. After the liquid crystal is injected, the liquid crystal injection port is sealed with a sealing material. Thereby, the liquid crystal is sealed between the array substrate and the counter substrate, and a liquid crystal layer is formed.

In recent years, a drop injection method has been used in a liquid crystal injection process. The dropping injection method is performed by dropping liquid crystal on a substrate surrounded by a sealing material. In this case, if the liquid crystal injection port is formed in the sealing material, the liquid crystal leaks from the liquid crystal injection port. Therefore, it is necessary to connect the sealing material by overlapping the application start portion and the application end portion of the sealing material (for example, Patent Document 1). reference).
JP 2007-65037 A

  Said sealing material has a 1st seal part and a 2nd seal part connected to the 1st seal part, and the application start part and the application end part overlapped. By bonding the array substrate and the counter substrate, the sealing material spreads. In a liquid crystal display panel with a wide frame width, even if the sealing material spreads, the liquid crystal display panel is not adversely affected.

However, in a liquid crystal display panel with a narrow frame width, such as a liquid crystal display panel for a mobile phone, if the sealing material, particularly the second seal portion, spreads, the liquid crystal display panel is adversely affected. For example, when the sealing material protrudes from the display area, display abnormality occurs. When the sealing material protrudes from the peripheral edge of the array substrate and the peripheral edge of the counter substrate, it is difficult to satisfactorily separate the array substrate and the counter substrate from the mother glass.
The present invention has been made in view of the above points, and an object thereof is to provide a liquid crystal display panel having a high product yield and a method for manufacturing the liquid crystal display panel.

In order to solve the above-described problems, a liquid crystal display panel according to an aspect of the present invention includes:
A first substrate having a display region and an upper structure that overlaps the display region and is formed on the substrate outside the display region;
A second substrate having the display area and disposed opposite the first substrate;
A sealing material that is an area outside the display area and is formed over the entire circumference in a frame-shaped overlapping area in which the first substrate and the second substrate overlap, and the first substrate and the second substrate are joined together;
A liquid crystal layer formed in a region surrounded by the first substrate, the second substrate and the sealing material,
The upper structure is located at the uppermost part of the overlapping region and has a recess recessed from the second substrate toward the first substrate,
A part of the sealing material is accommodated in the recess.

In addition, a liquid crystal display panel according to another aspect of the present invention includes:
In the liquid crystal display panel in which the first substrate and the second substrate are regions that are out of the display region and bonded together by a sealing material formed in a frame-shaped overlapping region in which the first substrate and the second substrate overlap each other,
The upper structure is formed in the display area and the overlapping area of the substrate, and is located at the uppermost portion of the overlapping area and has a recess recessed from the second substrate toward the first substrate. The first substrate;
A second substrate disposed opposite the first substrate;
The sealing material applied by a dispenser system over the entire circumference of the overlapping region of the first substrate or the second substrate, and joining the first substrate and the second substrate;
Liquid crystal is dropped on the first substrate or the second substrate surrounded by the sealing material, the first substrate and the second substrate are bonded together, and the region surrounded by the first substrate, the second substrate, and the sealing material A liquid crystal layer formed on
A part of the sealing material is accommodated in the recess.

In addition, a method of manufacturing a liquid crystal display panel according to another aspect of the present invention includes
A method of manufacturing a liquid crystal display panel in which the first substrate and the second substrate are regions that are out of the display region and are bonded together by a sealing material formed in a frame-shaped overlapping region in which the first substrate and the second substrate overlap. In
An upper structure is formed in the display area and the overlapping area of the substrate, and when the upper structure is formed, the upper structure is positioned on the uppermost portion of the overlapping area, and from the second substrate to the second structure. Forming a recess recessed toward one substrate,
Applying the sealing material to the overlapping region of the first substrate or the second substrate over the entire circumference by a dispenser method,
Dropping liquid crystal on the first substrate or the second substrate surrounded by the sealing material;
The first substrate and the second substrate are bonded through the sealing material, and a liquid crystal layer is formed in the region surrounded by the first substrate, the second substrate, and the sealing material by the dropped liquid crystal, When the first substrate and the second substrate are bonded together, a part of the sealing material is accommodated in the recess.

  According to the present invention, it is possible to provide a liquid crystal display panel having a high product yield and a method for manufacturing the liquid crystal display panel.

  Hereinafter, a liquid crystal display panel and a method for manufacturing the liquid crystal display panel according to the first embodiment of the present invention will be described in detail with reference to the drawings. Here, a liquid crystal display device including a liquid crystal display panel and a method for manufacturing the liquid crystal display device will be described.

  As shown in FIGS. 1 to 3, the liquid crystal display device includes a liquid crystal display panel 1, a backlight unit 2, and a bezel 3. The liquid crystal display panel 1 includes an array substrate 10 as a first substrate, a counter substrate 20 as a second substrate, a color filter 40, a plurality of spacers 50, a sealing material 60, a liquid crystal layer 70, a first polarizing plate 80, and a second polarization. A plate 90 is provided.

  The array substrate 10 and the counter substrate 20 are formed in a rectangular shape. The array substrate 10 and the counter substrate 20 are arranged so that the three sides of each of them substantially overlap. On the remaining side of the array substrate 10, the array substrate 10 extends outward from the counter substrate 20. The array substrate 10 and the counter substrate 20 are a rectangular display region R1 where both substrates overlap and a region outside the display region R1, and a rectangular frame overlapping region where the array substrate 10 and the counter substrate 20 overlap. R2.

  The size of the array substrate 10 is 2.5 inches. The array substrate 10 has a glass substrate 11 as a transparent insulating substrate. A gate insulating film 12 is formed on the glass substrate 11. In the display region R1, a plurality of scanning lines 13 and a plurality of signal lines 14 are provided in a grid pattern on the gate insulating film 12 with an insulating film (not shown) interposed therebetween. Two adjacent scanning lines 13 and two adjacent signal lines 14 partition a pixel. An interlayer insulating film 15 is formed on the gate insulating film 12, the scanning line 13, and the signal line 14. The interlayer insulating film 15 is also formed in the overlapping region R2.

  For example, TFTs (thin film transistors) 16 are provided as switching elements near the intersections of the scanning lines 13 and the signal lines 14. The TFT 16 includes a gate electrode 16a extending a part of the scanning line 13, a channel layer 16b facing the gate electrode 16a through the gate insulating film 12, a source electrode 16c connected to one region of the channel layer 16b, and It has a drain electrode 16d connected to the other region. In this embodiment, the channel layer 16b is formed of polysilicon (p-Si). The source electrode 16 c is connected to a pixel electrode 17 described later, and the drain electrode 16 d is connected to the signal line 14.

  A plurality of pixel electrodes 17 are formed in a matrix on the interlayer insulating film 15. The pixel electrode 17 is formed of a transparent conductive film such as ITO (Indium Tin Oxide). The pixel electrode 17 is connected to the source electrode 16 c through a contact hole formed in the interlayer insulating film 15. The pixel electrode 17 forms a pixel.

  Although not all shown, a plurality of spacers 50 are formed at a predetermined density on the glass substrate 11 on which the pixel electrodes 17 are formed. The spacer 50 is a columnar spacer. On the glass substrate 11 on which the spacer 50 is formed, the alignment film 18 is formed so as to overlap the pixel electrode 17.

  As described above, the upper structure 5 is formed on the glass substrate 11. The upper structure 5 includes the gate insulating film 12, the scanning line 13, the signal line 14, the interlayer insulating film 15, the TFT 16, the pixel electrode 17, the alignment film 18, and the like.

  The counter substrate 20 has a glass substrate 21 as a transparent insulating substrate. In the display region R <b> 1, a light shielding layer 31 that overlaps the scanning lines 13 and the signal lines 14 is formed on the glass substrate 21. The light shielding layer 31 has a plurality of openings 32 in a matrix shape.

  In the overlapping region R2 outside the display region R1, a rectangular frame-shaped peripheral light shielding layer 33 is formed on the glass substrate 21 as a light shielding layer. The peripheral light shielding layer 33 is formed over the entire circumference of the overlapping region R2, and contributes to shielding light leaking from between the outside of the display region R1 and the inside of the bezel 3.

  On the glass substrate 21, the light shielding layer 31, and the peripheral light shielding layer 33, a plurality of red colored layers 40R, a plurality of green colored layers 40G, and a plurality of blue colored layers 40B are disposed. These colored layers 40R, 40G, and 40B are adjacent to each other and are arranged alternately to form the color filter 40. The peripheral portions of the colored layers 40R, 40G, and 40B overlap the light shielding layer 31.

  On the colored layers 40R, 40G, and 40B, the counter electrode 22 is formed of a transparent conductive material such as ITO. An alignment film 23 is formed on the counter electrode 22. The counter substrate 20 has a display surface S <b> 1 on the opposite side to the array substrate 10.

  The array substrate 10 and the counter substrate 20 are arranged to face each other with a predetermined gap by a spacer 50. The array substrate 10 and the counter substrate 20 are joined to each other by a sealing material 60 formed over the entire circumference in the overlapping region R2.

  The liquid crystal layer 70 is formed in a region surrounded by the array substrate 10, the counter substrate 20, and the sealing material 60. The array substrate 10 and the counter substrate 20 sandwich the liquid crystal layer 70. The first polarizing plate 80 is disposed on the outer surface of the array substrate 10. The second polarizing plate 90 is disposed on the outer surface of the counter substrate 20. For this reason, in this embodiment, the second polarizing plate 90 includes the display surface S1.

  The backlight unit 2 is disposed on the outer surface side of the array substrate 10. The backlight unit 2 includes a light guide plate 2a disposed to face the first polarizing plate 80, and a light source 2b and a reflection plate 2c disposed to face one side edge of the light guide plate. The light guide plate 2 a has a light emission surface S <b> 2 facing the first polarizing plate 80.

  The bezel 3 is formed in a frame shape, and is disposed on the display surface S1 side and outside the display region R1. The bezel 3 is positioned such that the inner periphery passes through a region facing the peripheral light shielding layer 33.

  As shown in FIGS. 1, 2, and 4, the upper structure 5 has a recess 6. In the upper structure 5, the recess 6 is located at the top of the overlapping region R <b> 2. The recess 6 is recessed from the counter substrate 20 toward the array substrate 10. In this embodiment, in the direction parallel to the plane of the array substrate 10, the length L of the recess 6 is 2.5 mm and the width W is 0.5 mm. The recess 6 is formed in the interlayer insulating film 15.

  The sealing material 60 is formed by being applied to the overlapping region R2 of the array substrate 10 or the counter substrate 20 by the dispenser method over the entire circumference. The sealing material 60 includes a first seal portion 61 and a second seal portion 62 that is connected to the first seal portion 61 and overlaps the application start portion and the application end portion. The second seal portion 62 is disposed to face the recess 6. The second seal part 62 has a cross-sectional area perpendicular to the plane of the array substrate 10 and the plane of the counter substrate 20 larger than the first seal part 61.

  As will be described later, the overlapping region R2 has a sealing material application region R3 to which the sealing material 60 is applied. The sealing material application region R3 includes a first seal portion application region R4 to which the first seal portion 61 is applied and a second seal portion application region R5 to which the second seal portion is applied. The second seal portion application region R5 is close to the recess 6. More specifically, the second seal portion application region R <b> 5 is located inside the recess 6 and is adjacent to the recess 6.

  A part of the sealing material 60 is accommodated in the recess 6. More specifically, a part of the second seal portion 62 is accommodated in the recess 6. The second seal portion 62 is provided in the overlapping region R2. The second seal portion 62 does not protrude into the display region R 1 or protrude outside the array substrate 10 and the counter substrate 20. For this reason, the sealing material 60 can be formed in the overlapping region R2.

Next, a more detailed configuration of the liquid crystal display device will be described together with its manufacturing method.
As shown in FIGS. 1, 2, 4, and 5, first, a mother glass 111 as a mother substrate having a larger dimension than the array substrate 10 is prepared as a transparent insulating substrate. According to this embodiment, the mother glass 111 has six rectangular array substrate formation regions R6 and an ineffective region R7 that is out of the array substrate formation region R6 in order to form the array substrate 10. .

On the prepared mother glass 111, the gate insulating film 12, the scanning line 13, the signal line 14, the interlayer insulating film 15, the TFT 16, the pixel electrode 17, the spacer 50, and the like are formed by normal manufacturing processes such as repeated film formation and patterning. Form. When the interlayer insulating film 15 was formed, the recess 6 was formed at the same time. Thereafter, an alignment film 18 having a thickness of 0.5 μm is formed by printing an alignment film material on the mother glass 111 including the display region R1. The alignment film 18 is subjected to a predetermined alignment process (rubbing).
As a result, six upper structures 5 are formed on the mother glass 111, and six array substrates 10 are completed.

  As shown in FIGS. 1 and 6, on the other hand, in the manufacturing method of the counter substrate 20, first, a mother glass 121 as a mother substrate having a size larger than that of the counter substrate 20 is prepared as a transparent insulating substrate. According to this embodiment, the mother glass 121 has six rectangular counter substrate forming regions R8 and an ineffective region R9 that is out of the counter substrate forming region R8 in order to form the counter substrate 20. .

  The light shielding layer 31 and the peripheral light shielding layer 33 are formed on the prepared mother glass 121. Subsequently, the colored layer 40R is formed on the glass substrate 21, the light shielding layer 31, and the peripheral light shielding layer 33 by using, for example, a photoetching method. Thereafter, similarly to the colored layer 40R, the colored layer 40G and the colored layer 40B are formed using, for example, a photoetching method.

Subsequently, the counter electrode 22 is formed on the colored layers 40R, 40G, and 40B. Next, the alignment film material is printed on the mother glass 121 including the display region R1, thereby forming the alignment film 23 having a thickness of 0.5 μm. The alignment film 23 is subjected to a predetermined alignment process (rubbing).
Thus, six counter substrates 20 are completed using the mother glass 121.

  Next, as shown in FIG. 7, for example, an ultraviolet curable resin is applied as a sealing material 60 on the upper structure 5 over the entire overlapping region R <b> 2 of the array substrate 10 by a dispenser method. As a result, the sealing material 60 is applied in a rectangular frame shape to the rectangular frame-shaped sealing material application region R3. More specifically, the first seal portion 61 is applied to the first seal portion application region R4, and the second seal portion 62 in which the application start portion and the application end portion overlap is applied to the second seal portion application region R5. The second seal portion 62 is applied adjacent to the recess 6.

  Subsequently, the mother glass 111 and the mother glass 121 are carried into a vacuum chamber (not shown). Then, in a vacuum, the liquid crystal is dropped on the upper structure 5 (array substrate 10) surrounded by the sealing material 60.

  As shown in FIGS. 5 to 8, thereafter, the mother glass 111 and the mother glass 121 are arranged to face each other so that the alignment film 18 and the alignment film 23 face each other, and the array substrate 10 and the counter substrate 20 are predetermined by a plurality of spacers 50. The peripheral portions of the array substrate and the counter substrate are bonded to each other by the sealing material 60 while maintaining the gap. As a result, as shown in FIGS. 2, 4 and 9, the first seal portion 61 expands and the width becomes 1 μm, and the second seal portion 62 also expands and the width becomes 1 μm or more. A part of the second seal portion 62 is accommodated in the recess 6. The sealing material 60 is located in the overlapping region R2.

  Thereafter, the bonded array substrate 10 and counter substrate 20 are carried out of the vacuum chamber. Next, the sealing material 60 was irradiated with ultraviolet rays to be cured, and further subjected to a thermosetting treatment. Thereby, the sealing material 60 that joins the array substrate 10 and the counter substrate 20 is formed. In addition, liquid crystal is sealed between the array substrate 10 and the counter substrate 20 to form a liquid crystal layer 70.

  Subsequently, the mother glass 111 is divided along the peripheral edge e1 of the array substrate forming region R6, and the mother glass 121 is divided along the peripheral edge e2 of the counter substrate forming region R8. When dividing, for example, a scribe line is drawn along the peripheral edges e1 and e2. Thereby, the array substrate 10 is cut out from the mother glass 111, and the counter substrate 20 is cut out from the mother glass 121. Thereby, six sets of liquid crystal cells are obtained.

  Next, the first polarizing plate 80 is disposed on the outer surface of the array substrate 10, and the second polarizing plate 90 is disposed on the outer surface of the counter substrate 20. Thereby, each liquid crystal display panel 1 is completed. Then, the backlight unit 2 and the bezel 3 are attached to the liquid crystal display panel 1. Although not shown, a drive circuit is mounted on the array substrate 10 that is removed from the counter substrate 20. As a result, it is assembled into a module. Thereby, each liquid crystal display device is completed.

  According to the liquid crystal display device and the method for manufacturing the liquid crystal display device configured as described above, the upper structure 5 has the concave portion 6 positioned at the uppermost portion of the overlapping region R2. Since the sealing material 60 is applied by a dispenser method, the sealing material 60 spreads by bonding the array substrate 10 and the counter substrate 20, but a part of the second sealing portion 62 is accommodated in the recess 6.

  Since the spread of the sealing material 60 can be suppressed, the sealing material 60 can be formed in the overlapping region R2 even in a liquid crystal display panel having a narrow frame width. Thereby, display abnormality can be prevented, and the array substrate 10 and the counter substrate 20 can be satisfactorily separated from the mother glasses 111 and 121.

Since the recess 6 can be formed simultaneously with the formation of the interlayer insulating film 15, it can be formed without increasing the number of manufacturing steps.
As described above, a liquid crystal display panel with a high product yield and a method for manufacturing the liquid crystal display panel can be obtained, and a liquid crystal display device with a high product yield and a method for manufacturing the liquid crystal display device can be obtained.

  Next, a liquid crystal display panel and a method for manufacturing the liquid crystal display panel according to the second embodiment of the present invention will be described in detail. In this embodiment, the other configuration is the same as that of the first embodiment described above, and different parts of the configuration will be described in detail below.

  As shown in FIG. 10, the upper structure 5 has a recess 6. In this embodiment, the length L of the recess 6 is 2.5 mm and the width W is 1.5 mm in the direction parallel to the plane of the array substrate 10. The recess 6 is formed in the interlayer insulating film 15.

  The sealing material 60 is formed by being applied to the overlapping region R2 of the array substrate 10 or the counter substrate 20 by the dispenser method over the entire circumference. The sealing material 60 has a first seal portion 61 and a second seal portion 62. The second seal portion 62 is disposed to face the recess 6. More specifically, the second seal portion 62 overlaps the recess 6.

  As will be described later, the second seal portion application region R5 is close to the recess 6. More specifically, the second seal portion application region R5 overlaps the recess 6.

  A part of the sealing material 60 is accommodated in the recess 6. More specifically, most of the second seal portion 62 is accommodated in the recess 6. The second seal portion 62 is provided in the overlapping region R2. The second seal portion 62 does not protrude into the display region R 1 or protrude outside the array substrate 10 and the counter substrate 20. For this reason, the sealing material 60 can be formed in the overlapping region R2.

  As shown in FIG. 11, when the sealing material 60 is applied by the dispenser method, the first seal portion 61 is applied to the first seal portion application region R4, and the second seal portion application region R5 that overlaps the recess 6 is applied to the second seal portion. Two seal portions 62 are applied.

  Then, the peripheral portions of the array substrate 10 and the counter substrate 20 are bonded together by the sealing material 60. As shown in FIG. 12, the 1st seal | sticker part 61 spreads, a width | variety will be 1 micrometer, the 2nd seal | sticker part 62 will also spread, and a width | variety will be 1 micrometer or more. Most of the second seal portion 62 is accommodated in the recess 6. The sealing material 60 is located in the overlapping region R2.

  According to the liquid crystal display panel configured as described above and the method for manufacturing the liquid crystal display panel, the upper structure 5 has the recess 6 located at the uppermost part of the overlapping region R2. Since the sealing material 60 is applied by a dispenser method, the sealing material 60 spreads by bonding the array substrate 10 and the counter substrate 20, but most of the second sealing portion 62 is accommodated in the recess 6.

  Since the spread of the sealing material 60 can be suppressed, the sealing material 60 can be formed in the overlapping region R2 even in a liquid crystal display panel having a narrow frame width. Thereby, display abnormality can be prevented, and the array substrate 10 and the counter substrate 20 can be satisfactorily separated from the mother glasses 111 and 121.

Since the recess 6 can be formed simultaneously with the formation of the interlayer insulating film 15, it can be formed without increasing the number of manufacturing steps.
As described above, a liquid crystal display panel with a high product yield and a method for manufacturing the liquid crystal display panel can be obtained, and a liquid crystal display device with a high product yield and a method for manufacturing the liquid crystal display device can be obtained.

  Next, a liquid crystal display panel according to a comparative example of the present invention and a method for manufacturing the liquid crystal display panel will be described in detail. In this comparative example, the other configuration is the same as that of the first embodiment described above, and different parts of the configuration will be described in detail below.

  As shown in FIG. 13, the liquid crystal display panel is formed without providing the recess 6 in the upper structure 5. When the sealing material 60 is applied by the dispenser method, the first seal portion 61 is applied to the first seal portion application region R4, and the second seal portion 62 is applied to the second seal portion application region R5 that overlaps the recess 6.

  Then, the peripheral portions of the array substrate 10 and the counter substrate 20 are bonded together by the sealing material 60. As shown in FIGS. 14 and 15, the first seal portion 61 is expanded and has a width of 1 μm, and the second seal portion 62 is also expanded and has a width of 1 μm or more. The second seal portion 62 was formed so as to protrude beyond the overlapping region R2 and into the display region R1 and the mother glass ineffective regions R7 and R9.

  When formed using the liquid crystal display panel manufacturing method of the comparative example, a defect occurred in 8% of the manufactured liquid crystal display panel due to the spread of the sealing material 60. For this reason, a liquid crystal display panel with a high product yield and a method for manufacturing the liquid crystal display panel could not be obtained.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

  For example, the recess 6 may be formed over the entire circumference in the overlapping region R2. In this case, as shown in FIGS. 16 and 7, the concave portion 6 is connected to the first concave portion 6a and the first concave portion 6a, and is opposed to the first concave portion 6a. And a second recess 6b that is recessed larger than the first recess 6a.

  In addition, when apply | coating the sealing material 60 by a dispenser system, the 1st seal part 61 is apply | coated to 1st seal part application area | region R4 which overlapped with the 1st recessed part 6a, and the 2nd seal part application area | region which overlapped with the 2nd recessed part 6b The second seal portion 62 was applied to R5.

  The upper structure 5 may have a plurality of recesses. For example, as shown in FIGS. 18 and 19, the upper structure 5 has a recess 6 and another recess 7. The concave portion 7 is disposed opposite to the concave portion 6 with a space therebetween, is located at the uppermost portion of the overlapping region R2, and is recessed from the counter substrate 20 toward the array substrate 10. The recess 7 is formed in the interlayer insulating film 15.

  The second seal portion application region R <b> 5 is located between the recess 6 and the recess 7. The second seal portion 62 is disposed between the recess 6 and the recess 7. A part of the second seal portion 62 is accommodated in the recess 6 and the recess 7.

In the first embodiment, the recess 6 is located on the opposite side of the display area R1 with respect to the second seal portion 62, but the recess 6 is located between the second seal portion 62 and the display area R1. May be located.
The recessed parts 6 and 7 and the sealing material 60 should just be located in the superimposition area | region R2.

The recesses 6 and 7 are formed in the interlayer insulating film 15, but the invention is not limited to this. The recesses 6 and 7 may be provided in the upper structure 5 and may be positioned at the uppermost part of the overlapping region R2.
The recesses 6 and 7 may be formed in the counter substrate 20. In this case, the upper structure formed on the glass substrate 21 only needs to have the recesses 6 and 7. For example, the recesses 6 and 7 can be formed in the color filter 40 formed in the overlapping region R2.

1 is a cross-sectional view showing a liquid crystal display device including a liquid crystal display panel according to a first embodiment of the present invention. FIG. 2 is a schematic plan view showing the liquid crystal display panel shown in FIG. 1. FIG. 3 is a schematic plan view showing a wiring structure of the array substrate shown in FIGS. 1 and 2. The enlarged plan view which shows the sealing material and recessed part shown in FIG. The top view which shows the state which formed six array substrates on the mother glass in the manufacturing process of the said liquid crystal display device. The top view which shows the state which formed six counter substrates on the mother glass in the manufacturing process of the said liquid crystal display device. It is a figure which shows a part of mother glass shown in FIG. 5, and is a top view which shows the state which apply | coated the sealing material to the array substrate. Sectional drawing which shows the state which has arrange | positioned two mother glasses shown in FIG.5 and FIG.6 facing each other through the sealing material. Sectional drawing which shows the state which bonded the mother glass shown in FIG. 8 through the sealing material. The enlarged plan view which shows the sealing material and recessed part of a liquid crystal display panel which concern on 2nd Embodiment of this invention. Sectional drawing which shows the state which has arrange | positioned the array board | substrate (mother glass) and counter substrate (mother glass) of the liquid crystal display panel shown in FIG. Sectional drawing which shows the state which bonded together the array substrate and counter substrate which were shown in FIG. 11 through the sealing material. Sectional drawing which shows the state which has arrange | positioned the liquid crystal display panel array substrate (mother glass) and counter substrate (mother glass) of the comparative example of this invention facing each other via the sealing material. FIG. 14 is a cross-sectional view illustrating a state in which the array substrate and the counter substrate illustrated in FIG. 13 are bonded together with a sealant. FIG. 15 is a plan view showing a state in which the array substrate and the counter substrate shown in FIG. 13 are bonded together with a sealing material in the same manner as FIG. 14. It is a figure which shows the modification of the recessed part of the said liquid crystal display panel, and is sectional drawing which shows a 1st recessed part and a 1st seal | sticker part especially. It is a figure which shows the modification of a recessed part similarly to FIG. 16, and is sectional drawing which shows a 2nd recessed part and a 2nd seal | sticker part especially. It is a figure which shows the modification of the upper structure of the said liquid crystal display panel, and especially opposes the array substrate (mother glass) in which the recessed part and the other recessed part were formed, and a counter substrate (mother glass) through a sealing material Sectional drawing which shows the state arrange | positioned. Sectional drawing which shows the state which bonded together the array substrate and counter substrate which were shown in FIG. 18 through the sealing material.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Liquid crystal display panel, 2 ... Backlight unit, 3 ... Bezel, 5 ... Upper structure, 6 ... Recessed part, 6a ... 1st recessed part, 6b ... 2nd recessed part, 7 ... Recessed part, 10 ... Array substrate, 11 ... Glass Substrate, 12 ... gate insulating film, 13 ... scanning line, 14 ... signal line, 15 ... interlayer insulating film, 16 ... TFT, 17 ... pixel electrode, 20 ... counter substrate, 21 ... glass substrate, 22 ... counter electrode, 40 ... Color filter, 50 ... Spacer, 60 ... Sealing material, 61 ... First seal part, 62 ... Second seal part, 70 ... Liquid crystal layer, 111 ... Mother glass, 121 ... Mother glass, R1 ... Display area, R2 ... Overlapping area , R3 ... Sealing material application region, R4 ... First seal portion application region, R5 ... Second seal portion application region, R6 ... Array substrate formation region, R7 ... Ineffective region, R8 ... Opposite substrate formation region, R9 ... Ineffective Area, S1 ... Table Surface.

Claims (8)

A first substrate having a display region and an upper structure that overlaps the display region and is formed on the substrate outside the display region;
A second substrate having the display area and disposed opposite the first substrate;
A sealing material that is an area outside the display area and is formed over the entire circumference in a frame-shaped overlapping area in which the first substrate and the second substrate overlap; and a sealing material that joins the first substrate and the second substrate;
A liquid crystal layer formed in a region surrounded by the first substrate, the second substrate, and a sealing material,
The upper structure is located at the uppermost part of the overlapping region and has a recess recessed from the second substrate toward the first substrate,
A part of the sealing material is a liquid crystal display panel accommodated in the recess. The seal material is connected to the first seal portion and the first seal portion, and is disposed to face the recess, and has a cross-sectional area perpendicular to the plane of the first substrate and the plane of the second substrate. A second seal portion larger than the portion,
The liquid crystal display panel according to claim 1, wherein a part of the second seal portion is accommodated in the recess. The overlapping region has a frame-shaped sealing material application region having a first seal portion application region to which the first seal portion is applied and a second seal portion application region to which the second seal portion is applied,
The liquid crystal display panel according to claim 2, wherein the second seal portion application region is close to the recess. The overlapping region has a frame-shaped sealing material application region having a first seal portion region to which the first seal portion is applied and a second seal portion application region to which the second seal portion is applied,
The liquid crystal display panel according to claim 2, wherein the second seal portion application region is overlapped with the concave portion. The seal material is connected to the first seal portion and the first seal portion, and is disposed to face the recess, and has a cross-sectional area perpendicular to the plane of the first substrate and the plane of the second substrate. A second seal portion larger than the portion,
The concave portion is formed over the entire circumference in the overlapping region, and is connected to the first concave portion and opposed to the first concave portion, and is opposed to the first concave portion, A second recess recessed larger than the first recess,
The liquid crystal display panel according to claim 1, wherein a part of the second seal portion is accommodated in the second recess. The upper structure is opposed to the recess with an interval, and is positioned at the uppermost portion of the overlapping region and has another recess recessed from the second substrate toward the first substrate. And
The seal material is connected to the first seal portion and the first seal portion, and is disposed between the recess and the other recess, and has a cross-sectional area perpendicular to the plane of the first substrate and the plane of the second substrate. A second seal portion larger than the first seal portion,
The liquid crystal display panel according to claim 1, wherein a part of the second seal portion is accommodated in the concave portion and the other concave portion. In the liquid crystal display panel in which the first substrate and the second substrate are regions that are out of the display region and bonded together by a sealing material formed in a frame-shaped overlapping region in which the first substrate and the second substrate overlap each other,
The upper structure is formed in the display area and the overlapping area of the substrate, and is located at the uppermost portion of the overlapping area and has a recess recessed from the second substrate toward the first substrate. The first substrate;
A second substrate disposed opposite the first substrate;
The sealing material applied by a dispenser system over the entire circumference of the overlapping region of the first substrate or the second substrate, and joining the first substrate and the second substrate;
Liquid crystal is dropped on the first substrate or the second substrate surrounded by the sealing material, the first substrate and the second substrate are bonded together, and the region surrounded by the first substrate, the second substrate, and the sealing material A liquid crystal layer formed on
A part of the sealing material is a liquid crystal display panel accommodated in the recess. A method of manufacturing a liquid crystal display panel in which the first substrate and the second substrate are regions that are out of the display region and are bonded together by a sealing material formed in a frame-shaped overlapping region in which the first substrate and the second substrate overlap. In
An upper structure is formed in the display area and the overlapping area of the substrate, and when the upper structure is formed, the upper structure is positioned on the uppermost portion of the overlapping area, and from the second substrate to the second structure. Forming a recess recessed toward one substrate,
Applying the sealing material to the overlapping region of the first substrate or the second substrate over the entire circumference by a dispenser method,
Dropping liquid crystal on the first substrate or the second substrate surrounded by the sealing material;
The first substrate and the second substrate are bonded through the sealing material, and a liquid crystal layer is formed in the region surrounded by the first substrate, the second substrate, and the sealing material by the dropped liquid crystal, A method for manufacturing a liquid crystal display panel, wherein a part of the sealing material is accommodated in the recess when the first substrate and the second substrate are bonded together.

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