JP2013243017A - Manufacturing method of display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a display panel which enables high production efficiency and formation of a narrow frame.SOLUTION: A manufacturing method of a display panel includes: a first process where a rectangle part 151 enclosing a display region 131 and four peripheral parts 152, 153, 154, 155 disposed at an outer periphery of the rectangle part 151 are provided on a first substrate by using a sealing material (145); and a second process where the first substrate and a second substrate are bonded to each other through the sealing material (145) to seal the display region 131. The peripheral parts 152, 153, 154, 155 are provided so that one-end side of each side 156, 157, 158, 159 forming the rectangle part 151 is extended, and each extended end is connected with another side 156, 157, 158, 159 of the rectangle part 151.

Description

  The present invention relates to a method for manufacturing a display panel in which a display region provided between two substrates arranged opposite to each other is sealed with a sealing material that surrounds the display region and is disposed between the substrates. It is.

An organic electroluminescence (EL) element is a self-luminous element, and therefore has an advantage that a backlight is not required, a viewing angle is wide, a reduction in thickness and power consumption is easy, and a response speed is high. . An organic EL display panel in which such EL elements are arranged has attracted much attention as a next-generation display that replaces a liquid crystal display device.
A general organic EL element includes an organic EL laminated body having a lower electrode, an organic material layer including a light emitting layer, and an upper electrode in this order on a substrate.

The material constituting the organic EL laminate is generally highly active and unstable, and easily reacts with moisture and oxygen in the air. Since such a reaction with moisture or oxygen causes the characteristics of the organic EL element to be remarkably deteriorated, it is indispensable to seal the organic EL element from outside air in the organic EL display panel.
Accordingly, the sealing of the display region in which a plurality of EL elements are arranged is a sealing material (for example, glass frit) so as to surround the display region (element formation scheduled region) with respect to any one of the substrates. ) Containing paste (for example, glass paste), the other substrate is overlaid, and the sealing material is melted (fired).

As a typical application method of the paste to the substrate, there are a screen printing method using a screen mask and a dispenser method using a nozzle.
FIG. 27 is a diagram illustrating a state where a paste is applied to a substrate.
In general, the display area has a rectangular shape, and the paste 901 is arranged in a rectangular shape along the display area 903. The paste 901 is applied to the right-angled corners of the display area 903 in an arc shape as shown in FIG. 27A or in a right-angle shape as shown in FIG. Note that the paste portion applied to the corner of the display area 903 is a corner portion 905 in (a) and a corner portion 907 in (b).

  If the corner portion 905 of the applied paste 901 has an arc shape as shown in FIG. 27A, the direction of the stress acting on the corner portion 905 gradually changes as shown in FIG. The residual stress acting as compared with the case where the corner portion 907 is a right angle is not used in FIG.

JP-A-10-116560

In the production of displays, for the purpose of improving the number of panels that can be produced per piece of mother glass, it is a very important issue to narrow the frame, that is, to reduce the area of the display panel peripheral area outside the panel display area. is there. In addition, there is a strong demand for a narrow frame from the viewpoint of design of the display panel.
However, in the technique of applying the paste in an arc shape to the corner portion of the display area described above (FIG. 27A), the sealing material enters the inside at the corner portion, so the display area is sealed. It is necessary to keep away from the side of the material, and it is difficult to meet the demand for narrow frame. For this reason, it is difficult for the conventional technology to achieve both production efficiency and narrowing of the frame.

  Therefore, the present invention has been made in view of the above problems, and provides a method for manufacturing a display panel capable of achieving both production efficiency and a narrow frame.

  On the first substrate, using a sealing material, a first step of providing a rectangular portion surrounding the display area and a plurality of peripheral portions arranged around the outside of the rectangular portion; and A second step of bonding the first substrate and the second substrate and sealing the display area, and the peripheral portion extends from one end side of the rectangular portion to form an extended end thereof Is provided so as to be connected to the rectangular portion or other peripheral portion.

  A first step of providing, on a first substrate having a plurality of display regions, a plurality of rectangular portions surrounding each display region and a plurality of peripheral portions disposed around the outside of the rectangular portions using a sealing material; A second step of bonding the first substrate and the second substrate through the sealing material and sealing the plurality of display regions, and the peripheral portion is formed of the plurality of rectangular portions. There is provided a manufacturing method characterized in that one end side of one side constituting the rectangular portion is extended so that the extended end is connected to the plurality of rectangular portions or other peripheral portions.

  In a certain aspect, in the manufacturing method according to the present invention, the peripheral portion around the outside of the rectangular portion extends one end side of one side constituting the rectangular portion, and the extended end is the rectangular portion or the other peripheral portion. It is provided so that it may connect to a part. For this reason, in the corner | angular part of a rectangular part, it will cross | intersect a peripheral part and a rectangular part, and even if the corner | angular part of a rectangular part is a right angle, it can make it difficult to generate | occur | produce a high residual stress in a corner | angular part.

It is a fragmentary sectional view which shows typically the principal part of the display panel of 1st Embodiment. It is a top view of an EL substrate. It is the figure which looked at the cross section of A1-A2 of FIG. 2 from the arrow direction. It is the figure which looked at the cross section of B1-B2 of FIG. 2 from the arrow direction. It is a top view of CF board | substrate. It is the figure which looked at the cross section of C1-C2 of FIG. 5 from the arrow direction. It is the figure which looked at the cross section of D1-D2 of FIG. 5 from the arrow direction. It is a figure explaining CF process. It is a figure explaining a joining process. It is a figure explaining a dispenser device, (a) is a schematic diagram, (b) is a perspective view showing frit paste after application, and (c) shows a crossing part of frit paste after application and application. It is a perspective view. It is the schematic of the apply | coated frit paste, (a) is a perspective view, (b) is an expansion perspective view of a surrounding part. It is a figure which shows the application | coating method of a frit paste. It is a figure explaining a cutting process. It is a figure explaining the stress after the frit paste apply | coated to the glass substrate. It is a figure explaining application | coating of the frit paste in the case of multi-paneling a display panel. (A) is the figure which showed the rectangular part of the apply | coated frit paste with the continuous line, and the surrounding part was shown with the broken line, (b) is a figure explaining the application | coating method of frit paste. It is the schematic of the apply | coated frit paste which concerns on 2nd Embodiment, (a) is a perspective view, (b) is an expansion perspective view of a surrounding part. It is a figure which shows the application | coating method of a frit paste, (a) shows the state before application, (b) shows the state in the middle of application, (c) shows the state after application. It is a figure explaining application | coating of the frit paste in the case of multi-paneling a display panel. (A) is the figure which showed the rectangular part of the apply | coated frit paste with the continuous line, and the surrounding part was shown with the broken line, (b) is a figure explaining the application | coating method of frit paste. It is a figure explaining application | coating of the frit paste in the case of multi-paneling a display panel. (A) is the figure which showed the rectangular part of the apply | coated frit paste with the continuous line, and the surrounding part was shown with the broken line, (b) is a figure explaining the application | coating method of frit paste. It is a figure which shows the modification which concerns on 2nd Embodiment, (a) is the schematic of the applied frit paste which concerns on modification 2-1, (b) is the application | coating which concerns on modification 2-2 FIG. It is a schematic perspective view of the apply | coated frit paste which concerns on 3rd Embodiment. It is a figure explaining application | coating of the frit paste in the case of multi-paneling a display panel. (A) is the figure which showed the rectangular part of the apply | coated frit paste with the continuous line, and the surrounding part was shown with the broken line, (b) is a figure explaining the application | coating method of frit paste. It is a figure which shows the modification which concerns on 3rd Embodiment, (a) is the schematic of the applied frit paste which concerns on modification 3-1, (b) is the application | coating which concerns on modification 3-2 FIG. It is a schematic perspective view of the apply | coated frit paste which concerns on 4th Embodiment. FIG. 4 is a diagram for explaining application of frit paste when a display panel is multi-faceted, in which a) is a diagram showing a rectangular portion of the applied frit paste by a solid line and a peripheral portion by a broken line, and (b) is a frit. It is a figure explaining the application | coating method of a paste. It is a schematic plan view of the applied frit paste concerning a 4th embodiment, (a) shows the case of one chamfering, and (b) shows the case of multiple chamfering. It is a figure explaining the state which apply | coated the paste to the board | substrate in a prior art.

[Outline of Embodiment]
In the method for manufacturing a display panel according to the embodiment, a first part is provided on a first substrate by using a sealing material to provide a rectangular part that surrounds the display area and a plurality of peripheral parts that are arranged around the outside of the rectangular part. And a second step of sealing the display region by bonding the first substrate and the second substrate through the sealing material, and the peripheral portion is one side constituting the rectangular portion It is characterized by being provided so as to extend one end side of each of the two, and the extended end is connected to the rectangular portion or other peripheral portion.

  Further, in the embodiment, the peripheral portion may be provided such that the extending direction thereof is changed so that the extended end is connected to an end of one side constituting the rectangular portion, and the peripheral portion is extended. The extension may be provided so that the extension end is connected to the end of the other side opposite to the one side, and the peripheral portion changes the extension direction, and the extension end is changed to the other side of the one side. The peripheral portion may be provided so as to be connected to an end, and the peripheral portion may be provided such that the extension direction thereof is changed and the extension end is connected to another adjacent side via one end of the one side. Also good.

The method may further include a third step of forming a scribe line on each of the bonded first substrate and the second substrate, and the scribe line may cross at least a part of the peripheral portion.
On the other hand, the method for manufacturing a display panel according to the embodiment is arranged on a first substrate having a plurality of display areas, using a sealing material, around a rectangular part surrounding each display area and around the rectangular part. A first step of providing a plurality of surrounding portions, and a second step of bonding the first substrate and the second substrate through the sealing material to seal the plurality of display regions, The peripheral portion is provided so as to extend one end side of one side constituting the rectangular portion of the plurality of rectangular portions and to connect the extended end to the plurality of rectangular portions or other peripheral portions. It may be characterized.

Further, the sealing material may be a glass frit.
[Embodiment]
Hereinafter, a display panel manufacturing method according to an embodiment of the present invention will be described with reference to the drawings. In addition, in embodiment, the material and the numerical value which are used by this invention only have illustrated the preferable example, and are not limited to this form. In addition, changes can be made as appropriate without departing from the scope of the technical idea of the present invention. Further, combinations with other embodiments are possible as long as no contradiction occurs.
<First Embodiment>
1. Configuration (1) Overall Configuration FIG. 1 is a partial cross-sectional view schematically showing a main part of the display panel 10 of the first embodiment.

As shown in the figure, the display panel 10 includes an EL substrate 11 and a CF substrate 12, and a sealing resin layer 13 is interposed between the EL substrate 11 and the CF substrate 12.
The sealing resin layer 13 is obtained by curing the resin body supplied with the sheet material described above, and in addition to the purpose of bonding the EL substrate 11 and the CF substrate 12, moisture and gas are supplied from the outside of the display panel 10. The purpose is to prevent entry into the EL substrate 11.

The light extraction port side of the display panel 10 is the upper side or the front side, and the light extraction port side is the lower side in FIG.
(2) EL substrate The EL substrate 11 includes a substrate, an interlayer insulating film, an anode, a bank, a light emitting layer, and the like.
2 is a plan view of the EL substrate, FIG. 3 is a view of the cross section of A1-A2 of FIG. 2 viewed from the direction of the arrow, and FIG. 4 is a view of the cross section of B1-B2 of FIG. It is.

In the EL substrate 11, the side bonded to the CF substrate 12 is defined as the upper side or the front side (the lower side in FIG. 1).
In the EL substrate 11, a plurality of pixels 30 are arranged in a matrix direction on a substrate (111). Here, one pixel 30 includes three (three colors (R, G, B)) light emitting elements 31 (R), 31 (G), and 31 (B). In addition, when referring to the light emitting element in general regardless of the light emission color, the symbol “31” is simply used, and a region where the plurality of pixels 30 are arranged in a matrix is a display region. Note that a pixel in which a plurality of pixels 30 are formed in the display area is referred to as EL30a.

Here, one light emitting element 31 has a long shape, and the three light emitting elements 31 (R), 31 (G), and 31 (B) are arranged adjacent to each other in the short direction of the light emitting element 31. As a result, a substantially square pixel 30 is obtained in plan view (see FIG. 2). A pixel in which a plurality of pixels 30 are formed is referred to as EL30a.
Hereinafter, description will be made mainly with reference to FIGS.

Here, a TFT substrate 111 is used as the substrate. An interlayer insulating film 112 is formed on the upper surface of the TFT substrate 111.
On the upper surface of the interlayer insulating film 112, an anode 113a is disposed in units of light emitting elements 31. The anode 113 a has the same long shape as the plan view of the light emitting element 31. Further, as shown in FIGS. 3 and 4, an auxiliary electrode 113 b is formed between the pixels 30 in addition to the anode 113 a on the upper surface of the interlayer insulating film 112.

Banks 114 are formed between the anodes 113a and between the anode 113a and the auxiliary electrode 113b. The bank 114 protrudes upward from a region on the interlayer insulating film 112 where the anode 113a and the auxiliary electrode 113b are not formed and between the anode 113a and the auxiliary electrode 113b.
On the upper surface of the anode 113a in the region defined by the bank 114 (enclosed by the bank 114), a light emitting layer (herein, an organic light emitting layer) 115 having a predetermined light emission color is laminated.

  The predetermined emission colors here are three colors of “blue”, “green”, and “red”, but other colors such as yellow may be included in addition to the three colors. In the drawing, the blue light-emitting layer is represented by “115 (B)”, the green light-emitting layer is represented by “115 (G)”, and the red light-emitting layer is represented by “115 (R)”. In addition, when referring to the entire light emitting layer regardless of the emission color, the symbol “115” is simply used.

On the upper surface of the organic light emitting layer 115, the cathode 116 and the sealing layer 117 are continuous with the upper surface of the organic light emitting layer 115 and the upper surface of the auxiliary electrode 113 b adjacent to each other beyond the region defined by the bank 104. Is formed. The sealing layer 117 has a function of suppressing the organic light emitting layer 115 and the like from being exposed to moisture or being exposed to air.
(3) CF substrate FIG. 5 is a plan view of the CF substrate, FIG. 6 is a view of the cross section of C1-C2 in FIG. 5 viewed from the direction of the arrow, and FIG. 7 is an arrow of the cross section of D1-D2 in FIG. It is the figure seen from the direction.

In the CF substrate 12, the side bonded to the EL substrate 11 is defined as the upper side or the front side (the upper side in FIG. 1).
The CF substrate 12 includes a substrate 121, a color filter 122, and the like.
As shown in FIG. 5, the color filter 122 has a long shape similar to the planar view shape of the light emitting element 31 shown in FIG.

Hereinafter, description will be given mainly with reference to FIGS. 6 and 7.
The substrate 121 is a front substrate in the display panel 10 and is made of a light transmissive material. Color filters 122 (B), 122 (G), and 122 (R) are provided on the upper surface of the substrate 121 corresponding to the organic light emitting layers 115 (B), 115 (G), and 115 (R) of the EL substrate 11. Is formed. It should be noted that the symbol “122” is simply used when referring to all color filters regardless of the light color.

A so-called black matrix (hereinafter simply referred to as “BM”) 123 is formed between the color filters 122 on the upper surface of the substrate 121. As shown in FIGS. 6 and 7, each color filter 122 is formed in a state where a part of the color filter 122 rides on the peripheral edge portion of the upper surface of the BM 123 on both sides.
The BM 123 is a black layer provided for the purpose of preventing the reflection of external light and the incidence of external light on the display surface of the display panel 10 and improving the display contrast. As shown in FIG. 1, the BM 123 is formed so as to correspond (oppose) to the bank 114 of the EL substrate 11.

Note that a plurality of color filters 122 and BMs 123 formed in the display area is referred to as CF122a.
2. Manufacturing Method An example of the manufacturing method of the display panel 10 was prepared: an EL preparation step (1) for preparing an EL substrate 11a; a CF preparation step (2) for preparing a CF substrate 12a coated with a sealing material; The EL substrate 11a and the CF substrate 12a are manufactured through a bonding step (3) for bonding and bonding, and a cutting step (4) for cutting the periphery of the bonded intermediate panel 138. Here, a paste containing a sealing material is used. Specifically, glass frit is used as the sealing material, and the paste is frit paste.
(1) EL preparation step In the EL preparation step, the EL substrate 11a is prepared. Specifically, this is a step of forming an EL element (EL30a) on the substrate. In this step, an EL element can be formed by the same known technique as in the prior art, and the description here is omitted. The EL substrate 11 of the display panel 10 is obtained by cutting off the peripheral portion (unnecessary portion) of the EL substrate 11a.
(2) CF process In the CF preparation process, a CF forming process for forming CF122a on the substrate, an application process for applying a frit paste, and an applied frit paste (more precisely, a glass frit contained in the frit paste) And an integration step of integrating the substrate with each other. Here, the CF substrate 12a is obtained by forming the CF 122a on the substrate. The CF substrate 12 of the display panel 10 is obtained by cutting off the peripheral portion (unnecessary portion) of the CF substrate 12a.

Hereinafter, this process will be described in detail with reference to the drawings. Since there is a process of integrating the glass frit and the EL substrate, in order to distinguish these processes, the process of integrating with the CF substrate is defined as the CF integration process, and the process of integrating with the EL substrate is integrated with the EF. Process.
FIG. 8 is a diagram for explaining the CF process.
In the same figure, two views are shown on the left and right in the same process, the left figure is a perspective view of each process, and the right figure is a sectional view in the right process.
(A) CF forming step In the CF forming step, for example, a glass substrate 121 (the “first substrate” of the present invention) as shown in FIG. A CF 122a such as a plurality of color filters is formed on 131 as shown in FIG. Since this process uses the same known technique as in the past, the description here is omitted.
(B) Application Step In the application step, as shown in FIG. 5C, the frit paste 130 is applied to a portion corresponding to the sealing portion in the glass substrate 121.

The frit paste 130 is applied by a dispenser method so as to surround the area where the CF 122a is formed.
(C) Frit integration step In the frit integration step, for example, a drying step for eliminating the solvent and the like contained in the frit paste 130 and a firing step for eliminating the binder and the like contained in the frit paste 130 are performed in this order.

Here, as shown in FIG. 4D, the firing process is performed using a laser 132, and the glass frit (glass powder) contained in the frit paste 130 is melted together with the disappearance of the binder and the like. 121 is integrated. Note that a material in which the glass frit is baked and integrated with the glass substrate 121 is referred to as a sealing material 133.
This process changes the deformable frit paste into a glass frit that cannot be deformed at room temperature. For example, when the EL substrate 11a and the CF substrate 12a are bonded together, the EL substrate 11a and the CF substrate 12a are placed at room temperature (glass The frit is not melted) and the height of the glass frit cannot be adjusted by pressing.
(3) Joining step In the joining step, a sealing material application step for applying a sealing material to the CF substrate 12a, a resin material application step for applying a sealing resin material to the CF 122a of the CF substrate 12a, A depressurizing step for reducing the pressure before bonding the EL substrate 11a and the CF substrate 12a, a bonding step for bonding the CF substrate 12a to which the sealing material and the sealing resin material are applied, and the EL substrate 11a; A resin curing step of curing the resin material, and an EL integration step of integrating the EL substrate 11a and the sealing material 133.

Hereinafter, this process will be described in detail with reference to the drawings.
FIG. 9 is a diagram illustrating the joining process.
In the same figure, like FIG. 8, the situation in the same process is shown by two figures on the left and right, the left figure is a perspective view of each process, and the right figure is a sectional view in the right process.
(A) Application process In the sealing material application process, the sealing materials 135a and 135b are applied to the inside and the outside of the sealing material 133 along the sealing material 133 formed in a rectangular ring shape in plan view. Here, the outer sealing material 135a has a function of preventing moisture, oxygen, and the like from entering the display region from the outside mainly during the resin curing process and the EL integration process. The inner sealing material 135b mainly has a function of preventing the sealing resin material 136 from entering between the sealing material 133 before firing and the EL substrate 11a to cause poor adhesion.

In the resin material application process, the resin material 136 is dropped onto the display area. The dropping of the resin material is performed so as to obtain a uniform distribution state.
For both the sealing material and the resin material, a thermosetting resin or a UV curable resin may be used. As the thermosetting resin, an epoxy resin, a phenol resin, a melamine resin, a polyurethane resin, or the like can be used. Then, an epoxy resin, an acrylic resin, a polyester resin, or the like can be used.

The substrate in the state where the sealing material application step and the resin material application step are finished is a CF substrate 12a in FIG.
(B) Depressurization step In the depressurization step, the pressure is reduced immediately before the EL substrate 11a and the CF substrate 12a are bonded together. By this pressure reduction, it is possible to prevent air bubbles from being taken into the resin material 163 in the subsequent bonding step. Further, the gas intervening on the contact surface between the sealing materials 135a and 135b and the CF substrate 12a, the gas generated when the sealing material 133 is baked, and the like can be extracted.
(C) Bonding step In the bonding step, as shown in (a) of the figure, the CF substrate 12a that finished the coating step and the EL substrate 11a prepared in the EL preparation step are subjected to reduced pressure. The element region (EL30a) of the EL substrate 11a and the CF 122a of the CF substrate 12a are bonded so as to face each other, and the differential pressure generated when returning to atmospheric pressure is used so that the film thickness of the resin material 136 is uniform. Can be pasted together.
(D) Resin curing step In the resin curing step, a polymerization reaction of the resin material 136 and the sealing materials 135a and 135b interposed between the EL substrate 11a and the CF substrate 12a is performed. In addition, what hardened | cured the resin material 136 is the sealing resin 139 and seal part 135a ', 161b'.
(E) EL integration step In the EL integration step, the sealing material 133 is melted, and the molten sealing material 133 and the EL substrate 11a are integrated. Specifically, the sealing material 133 is fired, and the firing is performed using a laser 137 as shown in FIG.

A structure in which the EL substrate 11a and the CF substrate 12a are bonded together with a sealing material 133 or the like is referred to as an intermediate panel 138.
(4) Cutting process The cutting process cuts the periphery of the intermediate panel 138. The cut panel is the display panel 10. The cutting is performed along the rectangular portion 151 formed by applying the frit paste 130 of the intermediate panel 138. A diamond cutter or a laser scriber can be used for cutting.
3. Application Process The application process will be described in detail.
(1) Dispenser Device FIG. 10 is a view for explaining a dispenser device, (a) is a schematic view, (b) is a perspective view showing a frit paste after application, and (c) is a view after application. It is a perspective view which shows the cross part of a frit paste.

The dispenser device 140 includes a discharge unit 141 that accumulates and discharges the frit paste 130, a measurement unit 142 that measures a distance between the glass substrate 121, and a distance between the discharge unit 141 and the glass substrate 121 based on a measurement result of the measurement unit 142. And a control unit (not shown) for controlling the discharge pressure of the frit paste 130 from the discharge unit 141.
In order to distinguish between the frit paste before application to the glass substrate 121 and the frit paste after application, the code of the frit paste before application is “130” and the code of the frit paste after application is “145”. And

The discharge unit 141 includes a cylinder 146 that accumulates the frit paste 130 and a nozzle 147 that is provided at the lower end of the cylinder 146 and discharges the frit paste 130. The nozzle 147 and the cylinder chamber in the cylinder 146 communicate with each other, and the frit paste 130 is discharged by pressurizing the frit paste 130 in the cylinder chamber.
The measuring unit 142 measures the distance between the substrate surface of the glass substrate 121 located in the vicinity of the nozzle 147 and the bottom surface 147 a of the nozzle 147. For the measurement, for example, a laser displacement meter is used. The measurement result is output to the control unit.

The control unit can control the pressure in the cylinder chamber, control the moving speed of the discharge unit 141, and control the distance between the nozzle 147 and the glass substrate 121 based on the measurement result from the measurement unit 142.
The surface of the glass substrate 121 has minute undulations due to the film thickness variation of the glass substrate itself, the laminate formed on the substrate, and the flatness of the stage surface on which the glass substrate is mounted. This control unit can correct the undulations on the surface of the glass substrate 121.

  The height and width of the frit paste 145 applied on the glass substrate 121 include the pressure of the frit paste 130 in the cylinder chamber, the moving speed of the discharge portion 141, the distance between the bottom surface 147a of the nozzle 147 and the glass substrate 121, and the nozzle 147. And the area of the nozzle bottom 147a. In particular, the width is highly dependent on the opening diameter of the nozzle 147 and the area of the nozzle bottom 147a. On the other hand, the height is highly dependent on the pressure of the frit paste 130 in the cylinder chamber, the moving speed of the discharge unit 141, and the distance between the bottom surface 147a of the nozzle 147 and the glass substrate 121.

In the present embodiment, as shown in the enlarged view of FIG. 10A, the controller causes the gap between the bottom surface 147a of the nozzle 147 and the glass substrate 121 to be close to some extent and keep the gap constant. Controlled. As a control example, the control unit commands to perform feedback that adjusts the nozzle position.
Further, the control unit makes the pressure of the frit paste 130 in the cylinder chamber and the moving speed of the discharge unit 141 constant.

By adjusting the pressure of the frit paste 130 in the cylinder chamber and the moving speed of the discharge unit 141, the frit paste 145 applied on the glass substrate 121 is changed as shown in FIGS. 10B and 10C. , Can be made flat with uniform height and width.
The height of the frit paste 145 is substantially determined by the distance between the bottom surface 147 a of the nozzle 147 and the glass substrate 121. For example, when the viscosity of the frit paste 130 is 300,000 [mPa · s], the discharge speed is 10 [mm / s], the distance between the bottom surface 147a of the nozzle 147 and the glass substrate 121 is 15 [um], and the frit paste. The pressure of 130 is set to 0.20 [MPa].

At this time, the height of the frit paste 145 is determined by the distance between the bottom surface 147a of the nozzle 147 and the glass substrate 121, and is about 15 [um]. This is because the discharge resistance increases as the distance between the bottom surface 147a of the nozzle 147 and the glass substrate 121 decreases.
If the pressure of the frit paste 130 in the cylinder chamber and the moving speed of the discharge unit 141 are not appropriate, the above cannot be realized. For example, when the pressure is too high or the coating speed is too slow, the resin is discharged around the nozzle. If the pressure is too low or the application speed is too high, the height of the frit paste 145 is smaller than the distance between the bottom surface 147a of the nozzle 147 and the glass substrate 121, and the height is also uneven. In some cases, the phenomenon of fading is observed. Therefore, it is necessary to adjust an appropriate pressure and moving speed.

The frit paste 145 can also be maintained flat with respect to the cross portion 145a of the frit paste 145.
When the distance between the bottom surface 147a of the nozzle 147 and the glass substrate 121 is constant, the discharge resistance is increased by the already applied frit paste. Therefore, the height of the frit paste 145 is set to the height of the bottom surface 147a of the nozzle 147 and the glass substrate 121. It almost coincides with the interval. In addition, although the phenomenon that the already applied frit paste is stretched by the subsequently applied frit paste is seen in the cross portion, the width of the frit paste 145 becomes wider immediately after crossing and is usually as the distance from the cross portion 145a increases. It becomes the width of. The bottom surface 147a of the nozzle 147 is larger than the width of the cross portion 145a of the frit paste 145.
(2) Application Shape of Frit Paste FIG. 11 is a schematic view of the applied frit paste, (a) is a perspective view, and (b) is an enlarged perspective view of a peripheral portion.

As shown in FIG. 11, the frit paste 130 has a rectangular portion 151 and a plurality of (here, four) peripheral portions 152, 153, 154, and 155 (hereinafter referred to as “peripheral portions 152 to 155”). It is applied as follows. That is, the applied frit paste 145 has a rectangular portion 151 and surrounding portions 152 to 155.
(2-1) Rectangular portion The rectangular portion 151 surrounds a rectangular display region (corresponding to the CF 122) 131 in which a plurality of light emitting elements are formed, and has a rectangular shape in plan view. The rectangular portion 151 is composed of four side portions, and a pair of long side portions 156 and 158 extending along the longitudinal direction in the display region 131 and a pair of short side portions extending along the short direction. 157, 159. Note that it is not necessary to distinguish between the long side and the short side, and when the long side / short side portions 156, 157, 158, and 159 are represented, they are simply referred to as the side portions 156 to 159.
(2-2) Peripheral part The peripheral parts 152 to 155 are arranged outside the rectangular part 151. The peripheral portions 152 to 155 extend from the ends of the side portions 156 to 159 as they are in the extending direction of the side portions 156 to 159 and continue to the rectangular portion 151. That is, the side portions 156 to 159 are extended and the extended ends are connected to the rectangular portion 121.

Here, although the surrounding portions 152 to 155 are arranged in different locations, the basic configuration is the same. Therefore, the surrounding portion 152 shown in FIG. 11B will be described in detail.
For example, the peripheral portion 152 extends from the end 160 of the long side portion 156 as it is and continues to the short side portion 157 orthogonal to the end 160 of the long side portion 156, and the curved portions 152b, 152d, 152f, It has straight portions 152a, 152c, 152e, 152g.

To explain structurally, the peripheral portion 152 has a substantially rectangular shape in plan view, and includes a first straight line portion 152a, a first curved line portion 152b, a second straight line portion 152c, a second curved line portion 152d, a third straight line portion 152e, It has the 3rd curve part 152f and the 4th straight line part 152g in this order.
The first straight portion 152 a extends from the end 160 of the long side portion 156 to the outside of the display region 131 in the extending direction of the long side portion 156.

The first curved line portion 152b is on the opposite side (upper side in the figure) to the side where the short side part 157 exists (lower side in the figure) with respect to the first straight line part 152a. ) While changing in a curvilinear direction.
The second straight line portion 152c extends from the first curved line portion 152b in a direction parallel to the short side portion 157 and to the side opposite to the side where the short side portion 157 exists with reference to the long side portion 156.

The second curved line portion 152d changes in a curve from the second straight line portion 152c to the side where the long and short side portions 156 and 157 exist (on the left side in the figure) with reference to the second straight line portion 152c. Stretch while.
The third straight portion 152e extends from the second curved portion 152d to a side parallel to the long side portion 156 and closer to the long side portion 156 (on the left side in the drawing).

The third curved portion 152f extends while changing in a curved manner from the third straight portion 152e to the side closer to the long side / short side portions 156 and 157 (the lower side in the drawing).
The fourth straight portion 152g extends (extends) in the extending direction of the short side portion 157 from the third curved portion 152f and is connected (continuous) to the end 160 of the short side portion 157.
The end of each side portion is a portion having a virtual end surface orthogonal to the extending direction of each side portion (each side portion is extended, so there is no end surface of each side portion), for example, a long side portion The virtual end surface of the end 160 in 156 is denoted by reference numeral “160a” in FIG. 11B. For example, the virtual end surface of the end 160 in the short side portion 157 is denoted by reference numeral “160b” in FIG.

In the first to third curved portions 152b, 152d, and 152f, the center line of the frit paste 145 is curved with a radius of curvature of 0.5 [mm] or more in plan view. Note that tensile stress is generated in the glass substrate 121 when the sealing material 133 is baked in the previous EL integration step. This tensile stress depends on the difference in linear expansion coefficient between the glass substrate 121 and the sealing material 133, the firing temperature, and the film thickness of the sealing material 133. The smaller the radius of curvature of the frit paste 145, the more glass At the corner of the frit (sealing material 133), stress concentrates on the glass. For the purpose of preventing the glass substrate from being cracked by these tensile stresses, the radius of curvature may be set large as necessary.
(3) Application Method FIG. 12 is a diagram showing a frit paste application method.

The coating method here is an example, and the coating method of the frit paste 145 having the rectangular portion 151 and the surrounding portions 152 to 155 is not limited to this example.
Application of the frit paste 130 to the glass substrate 121 is started from a position A on the boundary line of the display region 131 as shown in FIG. Here, the position A where the application is started is an intersection of the portion where the long side portion 156 is to be formed and the portion where the short side portion 159 is to be formed.

  Application is started from position A, and the frit paste 130 is applied linearly along the boundary line of the display area 131 to form (place) the long side portion 156. Eventually, when it reaches the position where the short side portion 157 is to be formed, it is stretched as it is to form (place) the peripheral portion 152, and the intersection of the long side portion 156 and the portion where the short side portion 157 is to be formed (one of the display areas 131). The short side portion 157 is formed by extending in a direction perpendicular to the long side portion 156.

  Next, as shown in FIG. 12B, the peripheral portion 153 and a part of the long side portion 158 are formed, and as shown in FIG. 12C, the peripheral portion 154 and the short side portion 159 are formed. To do. Finally, as shown in FIG. 12D, after the peripheral portion 155 is formed, the end portion of the frit paste 130 is made continuous with the frit paste 145 applied at the position A where application is started.

In this way, the frit paste 145 having the rectangular part 151 and the four peripheral parts 152 to 155 is applied on the glass substrate 121.
4). Cutting Process FIG. 13 is a diagram illustrating the cutting process.
As shown in FIG. 13A, the cutting step includes a cutting step of cutting the peripheral portion of the intermediate panel 138 (cutting), and a deleting step of deleting the outer region of the rectangular portion of the CF substrate 12a. . Each step will be described below.
(1) Cut-off process In the cut-off process, the peripheral portion of the intermediate panel 138 is cut off as shown in FIG. The size after the peripheral portion is cut off is the same as the size of the display panel 10. As shown in FIG. 13 (a), the cut-off is parallel to the side portions 156 to 159 constituting the rectangular portion 151 formed on the basis of the applied frit paste 145 at a predetermined interval. This is performed along the extending cut lines E1, E2, E3, and E4 (hereinafter referred to as cut lines E1 to E4 and corresponding to the “scribe line” of the present invention).

An interval between at least one of the cutoff lines E1, E2, E3, and E4 and the side portion is an interval in which a part of the peripheral portion remains. That is, at least one cutoff line crosses at least a part of the peripheral portion. In addition, the order of cutting along the cutting lines E1 to E4 is not particularly limited.
(2) Deletion Step In the deletion step, as shown in FIG. 13B, only the peripheral portion of the CF substrate 12a is deleted so that the electrodes formed on the peripheral portion of the EL substrate 11a are exposed on the front side. . The part to be deleted from the CF substrate 12a is a part located outside the rectangular part 151 and between the peripheral parts 152 to 155 located outside the rectangular part 151.

The deletion of the peripheral portion of the CF substrate 12a includes a portion parallel to the corresponding side portions 156 to 159 of the rectangular portion 151 located between the remaining portions of the peripheral portions 152 to 155, as shown in FIG. Deletion lines F1, F2, F3, and F4 (hereinafter referred to as deletion lines F1 to F4) having a “U” shape in a plan view including portions that are close to the remaining portions between them and that are orthogonal to the side portions 156 to 159. (F4)). The order of cutting along the deletion lines F1 to F4 is not particularly limited.
(3) Summary The display panel 10 is obtained from the intermediate panel 138 by the above process. The display panel 10 has a rectangular overall shape (appearance shape) in plan view, and a part of each side of the CF substrate 12 constituting the outer tube shape is deleted. Terminal portions 161a, 161b, 161c, and 161d that are electrically connected to the respective EL elements 30 are formed on the EL substrate 11 corresponding to the deleted portion, and appear on the front side by the above-described deletion process (with external devices) Connection is possible.)

Here, since the terminal portion 161 is provided, the peripheral portion of the intermediate panel 138 is cut off while leaving a part of each of the peripheral portions 152 to 155, but the portion without the terminal portion is in contact with the rectangular portion 151. The peripheral part may be cut off.
5. Stress Distribution FIG. 14 is a diagram for explaining the stress after baking the frit paste applied to the glass substrate 121.

The arrow shown in FIG. 14 indicates the direction of the residual stress, similarly to the arrow shown in FIG. In addition, the rectangular part and the peripheral part after baking the frit paste 145 add "a" to the code | symbol of the rectangular part 151 of the frit paste 145, and the peripheral parts 152-155, and "151a" and "152a-155a" Will be described.
First, in FIG. 27, the stress acting on the inside of the paste 901 when the sealing material is baked is examined. The arrows directed inward and outward of the paste applied in a rectangular shape in the figure indicate the residual stress generated when the sealing material is fired. The residual stress shown in the figure is a tensile stress that is pulled in the direction of the arrow.

This tensile stress (residual stress when firing the sealing material contained in the paste 901) breaks the substrate when cutting the peripheral portions of the two bonded substrates (decrease in production efficiency). There is a case.
The crack of a glass substrate is demonstrated. Cracking of glass (glass substrate) occurs when a force larger than the bonding force between atoms constituting the glass material is applied. In general, glass materials are resistant to compressive stress and weak against tensile stress. There are innumerable cracks at the atomic level on the surface of the glass substrate. When a physical external force is applied to the substrate surface in a state where a tensile stress is applied to the glass substrate, a moment of force is generated around the crack, and the external force is concentrated on the crack. As a result, the crack is widened and extended, and the crack of the glass substrate is confirmed at the visual level.

Furthermore, it is easier to crack when tensile stress is applied in two orthogonal directions than when tensile stress is applied in one direction to the glass substrate. This is because when a tensile stress is applied in two directions, a torsional stress is generated at the intersection of the tensile stress and the stress is concentrated, and the crack is likely to extend at that point.
When the linear expansion coefficients of the sealing material and the glass substrate do not match completely, when the sealing material is baked and returned to room temperature, the tensile stress indicated by the arrow in the figure acts as a residual stress on the glass substrate. Continue.

  Among these tensile stresses, the tensile stress acts in a direction perpendicular to the side, that is, in one direction, in the side part (FIG. 27C) that forms a rectangular shape. On the other hand, in the vicinity of the corner portion 907, when applied at an angle close to a right angle as shown in FIG. 27B, the stress acting on the corner portion 907 is perpendicular to the two sides intersecting each other. Since a tensile stress is applied from two directions, a torsional stress is generated.

Therefore, stress concentrates in the outer region 909 of the corner portion 907, and the probability of occurrence of cracking of the glass substrate increases at that location. In particular, in the scribing process, there is a problem that the glass substrate breaks in an unexpected direction at the corner of the panel (one obtained by bonding two substrates) to the time signature to which an external force is applied.
On the other hand, if the corner portion 905 of the applied paste 901 has an arc shape as shown in FIG. 27A, the direction of the stress acting on the corner portion 905 changes gently. The torsional stress is less likely to occur, the tensile stress acting as compared with the right-angled corner portion 907 is reduced, and the probability of occurrence of cracking in the glass substrate is reduced, but as described above, the narrowing of the frame cannot be achieved.

Here, tensile stress as shown in FIG. 14 remains in the fired glass frit. In the side portion of the rectangular portion 151a, the tensile stress acts in one direction perpendicular to the side, so that the stress is not locally concentrated in the vicinity of the side.
The corner portion of the rectangular portion 151a forms a cross portion with the surrounding portions 152a to 155a, but in the vicinity of the cross portion, the direction of the tensile stress is continuous, and the direction changes rapidly. The torsional stress as shown in FIG. 27B is not generated.

Each of the surrounding portions 152a to 155a has a rectangular shape in a plan view, but each corner portion changes in a curve by increasing the radius of curvature. As described above, the direction of the tensile stress applied to the glass frit can be changed stepwise to disperse the stress acting on the glass frit, and the residual stress around each corner is reduced.
As described above, in the applied frit paste 145 described in the embodiment, the residual stress remaining after firing is reduced, and the glass substrate 121 is not cracked when the intermediate panel 138 is cut (scribed). be able to.
6). In the above example, the case where the frit paste 130 is applied to the glass substrate 121 having one display region 131 has been described. That is, the case where one display panel 10 is manufactured from one intermediate panel 138 has been described.

However, the above example can also be applied to the case where a frit paste is applied to a glass substrate having a plurality of display regions (so-called multi-sided). Hereinafter, an example of multi-chamfering will be described.
FIG. 15 is a diagram for explaining application of frit paste when a display panel is multi-sided. (A) is the figure which showed the rectangular part of the apply | coated frit paste with the continuous line, and the surrounding part was shown with the broken line, (b) is a figure explaining the application | coating method of frit paste.

As shown in FIG. 15A, the large plate 171 is a glass substrate having four display areas 173, 174, 175, and 176 here. Note that the four display areas are arranged in a matrix (in this case, two rows and two columns), and when there is no need to distinguish each display area, the display areas are represented as display areas 173 to 176.
A frit paste 172 is applied to the display areas 173 to 176 on the surface of the large plate 171. Application of the frit paste 130 is performed so that rectangular portions 177 to 180 surrounding the display regions 173 to 176 and peripheral portions 181 to 189 disposed outside the rectangular portions 177 to 180 are formed. That is, the frit paste 172 has rectangular portions 177 to 180 and peripheral portions 181 to 189.

Four peripheral portions 181 to 189 are arranged around the rectangular portions 177 to 180. More specifically, surrounding portions 181, 182, 185, and 186 are arranged around the rectangular portion 177.
In the two rectangular portions 177 to 180 adjacent to either one of the matrix directions, the peripheral portions 182, 184, 186 and 188 arranged at the corners adjacent to each other extend over the two rectangular portions 177 to 180. Is formed. More specifically, the rectangular portion 177 and the rectangular portion 178 are adjacent to each other in the row direction, and the peripheral portion 182 arranged at a corner near the periphery of the large plate 171 extends over the rectangular portion 177 and the rectangular portion 178. Is formed.

Note that the peripheral portion 182 functions as a peripheral portion of the rectangular portion 177 or a peripheral portion of the rectangular portion 178, and two peripheral portions may overlap each other. One peripheral portion 182 may be shared.
In the four rectangular portions 177 to 180 adjacent to each other in the matrix direction, the peripheral portions 185 arranged at the corners adjacent to each other are formed so as to straddle the four rectangular portions 177 to 180. The peripheral portion 185 also functions as the peripheral portion of the rectangular portion 177, the peripheral portion of the rectangular portion 178, the peripheral portion of the rectangular portion 179, and the peripheral portion of the rectangular portion 180. May be overlapped, or four rectangular portions 177 to 180 may share one peripheral portion 185.

The arrangement of the rectangular portions 177 to 180 and the peripheral portions 181 to 189 having the above configuration can be performed by three coatings (three strokes) as shown in FIG.
First, in the first application, the frit paste 172a is applied so as to surround the four display areas 173 to 176 indicated by the solid lines, and the second application has a rectangular shape that is long in the column direction indicated by the broken lines. A frit paste 172b is applied between display areas adjacent to each other in the row direction, and the third application is performed between display areas adjacent to each other in the column direction so as to have a long rectangular shape described in the two-dot chain line in the row direction. A frit paste 172c is applied.

Note that the order of the first application, the second application, and the third application may be the order of these numbers or another order.
<Second Embodiment>
In the first embodiment, the peripheral portion extends as it is from the end of one side (for example, a long side portion) constituting the rectangular portion, and is adjacent to the one side (for example, a short side portion). However, it may extend from the end of one side (for example, a long side portion) constituting the rectangular portion and may continue to the side that is not adjacent to the one side.

In the second embodiment, a peripheral portion extending from one end of one side (for example, a long side portion) constituting the rectangular portion and continuing to one end of another side arranged in parallel with the one side will be described. To do.
1. Configuration (shape)
FIG. 16 is a schematic view of a coated frit paste according to the second embodiment, (a) is a perspective view, and (b) is an enlarged perspective view of a peripheral portion.

As shown in FIG. 16A, the frit paste 201 includes a rectangular portion 202 and a plurality of (here, four) peripheral portions 203, 204, 205, and 206 (hereinafter referred to as “peripheral portions 203 to 206”). It is applied to the substrate 200 so as to have.
(1) Rectangular portion The rectangular portion 202 surrounds a rectangular display region 131 in which a plurality of light emitting elements are formed, and has a rectangular shape in plan view. The rectangular portion 202 is composed of four side portions, and a pair of long side portions 207 and 208 extending along the longitudinal direction in the display region 131 and a pair of short side portions extending along the short direction. 209 and 210 are orthogonal to each other. Note that it is not necessary to distinguish between the long side and the short side, and when the long side / short side portions 207, 208, 209, and 210 are represented, they are simply referred to as the side portions 207 to 210.
(2) Peripheral parts The peripheral parts 203 to 206 are arranged outside the rectangular part 202. The peripheral portions 203 to 206 extend from one end of the side portions 207 to 210 in the extending direction of the side portions 207 to 210 as they are, and extend to one end of the side portions 207 to 210 parallel to the side portions 207 to 210 having the one end. It is continuous. That is, one end side of the side portions 207 to 210 is extended, and the extended end is connected to one end side of the other side portions 207 to 210 facing the side portion.

Here, although each of the peripheral portions 203 to 206 has a different arrangement location, the basic configuration is the same, and therefore the peripheral portion 203 shown in FIG. 16B will be described in detail.
The peripheral portion 203 extends, for example, from one end 211 of the long side portion 207 and continues to one end 212 of the long side portion 208, which is another long side portion arranged in parallel with the long side portion 207. On the way, there are curved portions 203a and 203c and a straight portion 203b.

Explaining structurally, the peripheral portion 203 has a “U” shape so that the opening side becomes a rectangular portion 202 in a plan view, and the first curved portion 203a, the first straight portion 203b, and the second curved portion 203c are formed. Have in this order. That is, the first straight line portion 203b is sandwiched between the first and second curved portions 203a and 203c.
The first curved portion 203a extends from one end 211 of the long side portion 207 to the side where the other long side portion 208 exists while changing in a curved manner. The second curved portion 203c changes in a curved manner to the side opposite to the first curved portion 203a, and extends while changing in a curved manner from one end 212 of the long side portion 208 to the side where the other long side portion 207 exists. In addition, the 1st curve part 203a and the 2nd curve part 203c are carrying out the circular arc shape of 1/4 of a circle in planar view.

The first straight line portion 203b is disposed so as to connect the end of the first curved portion 203a that is not on the long side portion 207 side and the end of the second curved portion 203c that is not on the long side portion 208 side. It extends parallel to the short side portion 209 straddling (adjacent) the long side portion 208.
(3) Application Method FIGS. 17A and 17B are diagrams showing a frit paste application method. FIG. 17A shows a state before application, FIG. 17B shows a state during application, and FIG. 17C shows a state after application. .

The application method here is an example, and the application method of the frit paste 201 having the rectangular portion 202 and the peripheral portions 203 to 206 is not limited to this example.
Application of the frit paste 130 to the substrate 200 is performed by application twice, as shown in FIGS. As shown in FIG. 17B, the first application is positioned outside two opposing sides of the rectangular display area 131 and the remaining two sides orthogonal to the two sides in the display area 131. The frit paste 130 is applied so as to have a rectangular shape with two sides (larger than the display area 131). As shown in FIG. 17C, the second application is performed on two opposite sides of the rectangular display area 131 and the frit paste 130 is not applied in the first application, and the display area. The frit paste 130 is applied so as to have a rectangular shape (larger than the display area 131) having two sides positioned outside the two sides orthogonal to the two sides not applied in 131.

This will be specifically described below.
As shown in FIG. 17A, the display area 131 is partitioned by a pair of two sides 131a and 131b and a pair of two sides 131c and 131d orthogonal to the pair of two sides 131a and 131b.
In the first application, as shown in FIG. 17A, two opposing sides 131a and 131b that define the display area 131 and sides that are located outside the remaining two sides 131c and 131d excluding these two sides. A frit paste 130 is applied on a rectangle including 213c and 213d to form a first rectangular portion 214.

In the second application, as shown in FIG. 17A, two opposing sides 131c and 131d that divide the display area 131 and sides that are located outside the remaining two sides 131a and 131b excluding these two sides. A frit paste 130 is applied on a rectangle including 213a and 213b, and a second rectangular portion 215 is formed as shown in FIG.
By applying the above two times, a frit paste 201 having a rectangular portion 202 and surrounding portions 203 to 206 as shown in FIG. 16 is obtained.
2. In the above example, the case where the frit paste 130 is applied to the glass substrate 200 having one display region 131 has been described. That is, the case where one display panel is manufactured from one intermediate panel has been described.

However, the above example can also be applied to multi-chamfering, and an example of multi-chamfering will be described below.
(1) Example 1
FIG. 18 is a diagram for explaining application of frit paste when a display panel is multi-faceted. (A) is the figure which showed the rectangular part of the apply | coated frit paste with the continuous line, and the surrounding part was shown with the broken line, (b) is a figure explaining the application | coating method of frit paste.

As shown in FIG. 18A, the large plate 220 is a glass substrate having four display areas 222, 223, 224, and 225 here. Note that the four display areas are arranged in a matrix (in this case, two rows and two columns), and when the display areas do not need to be distinguished, they are represented as display areas 222 to 225.
On the surface of the large plate 220, a frit paste 221 is applied to the display areas 222 to 225. Application of the frit paste 130 is performed so that rectangular portions 226 to 229 surrounding the display regions 222 to 225 and peripheral portions 231 to 246 disposed outside the rectangular portions 226 to 229 are formed.

As shown in FIG. 18A, six peripheral portions 231 to 246 are arranged around the rectangular portions 226 to 229. Specifically, surrounding portions 231, 239, 243, 246, 242, and 238 are arranged around the rectangular portion 226.
In each side part of each rectangular part 226 to 229, each side part that is not adjacent to the other rectangular parts 226 to 229 extends from one end of each side part to the outside of the display region 222 to 225 and includes the side part. It is connected to the same side end as the one end in a side portion that forms a rectangular portion and is parallel to the side portion including the one end.

  An example will be specifically described using the rectangular portion 226. A periphery extending from one end 247 of the short side portion 226a of the rectangular portion 226 opposite to the side where the rectangular portion 229 is located (the upper end in the drawing). The portion 231 extends from one end 247 of the short side portion 226a to the outside of the display region 222, curves along the long side portion 226c, and further extends along the long side portion 226c, and then extends toward the rectangular portion 226. Curved and connected to one end of a short side portion 226b parallel to the short side portion 226a.

In each side part of each rectangular part 226 to 229, when another rectangular part exists on the extension of the side part, the peripheral part extending from the other rectangular part side of the side part extends from the end as it is. And continue to the other rectangular part.
An example will be described using the rectangular portion 226. The rectangular portion 229 exists on the extension of the short side portion 226a, and the peripheral portion 242 extending from the other end 248 of the short side portion 226a extends from the other end 248 as it is. And continues to the short side portion 229a of the rectangular portion 229.

  Note that the peripheral portion 242 and the peripheral portion 246 may be connected to each other via the outside of another rectangular portion 229 adjacent to the rectangular portion 226 in the column direction. In that case, the peripheral portion 242 and the peripheral portion 246 may be connected to the rectangular portion 226 in the column direction. The peripheral part of the rectangular part 229 adjacent to the rectangular part 226 may be included in the peripheral part of the rectangular part 226. This also applies to the peripheral portions 239 and 243, the peripheral portions 240 and 244, and the peripheral portions 241 and 245.

As shown in FIG. 18B, the rectangular portions 226 to 229 and the surrounding portions 231 to 246 having the above-described configuration can be implemented (four strokes) by applying a plurality of times (here, four times). .
First, the first and second coatings surround a plurality (here, two) of display areas arranged in each of a plurality (here, two) of columns. The frit paste 130 is applied, and the third and fourth applications are displayed in plural (here, two) arranged in each of the plural (here, two) lines. A frit paste 130 is applied so as to surround the region.

Specifically, referring to FIG. 18B, as indicated by the solid line, the first coating is applied to the frit paste 221a so as to surround the two display areas 222 and 225 arranged in the first row. Apply. In the second application, as indicated by a broken line, the frit paste 221b is applied so as to surround the two display areas 223 and 224 arranged in the second row. In the third application, as indicated by a one-dot chain line, a frit paste 221c is applied so as to surround the two display areas 222 and 223 arranged in the first row. In the fourth application, as indicated by a two-dot chain line, a frit paste 221d is applied so as to surround the two display areas 225 and 224 arranged in the second row. The order of the first application, the second application, the third application, and the fourth application may be the order of these numbers or another order.
(2) Example 2
FIG. 19 is a diagram for explaining application of frit paste when a display panel is multi-sided. (A) is the figure which showed the rectangular part of the apply | coated frit paste with the continuous line, and the surrounding part was shown with the broken line, (b) is a figure explaining the application | coating method of frit paste.

As shown in FIG. 19A, the large plate 250 is, for example, a glass substrate having four display areas 252, 253, 254, and 255. Note that the four display areas are arranged in a matrix (in this case, two rows and two columns), and when the display areas do not need to be distinguished, they are represented as display areas 252 to 255.
A frit paste 251 is applied to the display area 252 to 255 on the surface of the large plate 250. Application of the frit paste 130 is performed so as to form rectangular portions 256 to 259 that surround the display regions 252 to 255 and peripheral portions 261 to 269 disposed outside the rectangular portions 256 to 259.

As shown in FIG. 19B, five peripheral portions 261 to 269 are arranged around each of the rectangular portions 256 to 259. Specifically, surrounding portions 261, 265, 269, 268, and 264 are arranged around the rectangular portion 256.
Here, a rectangular area including the four display areas 252 to 255 is denoted by 260.
The peripheral portions 261, 262, 263, and 264 are arranged outside the region 260 so as to connect both ends of each of the four sides constituting the region 260.

  In the two rectangular portions adjacent to one of the matrix directions, the surrounding portions 265, 266, 267, and 268 arranged at the corners adjacent to each other are formed so as to straddle the two rectangular portions. More specifically, the rectangular portion 256 and the rectangular portion 257 are adjacent to each other in the row direction, and a peripheral portion 265 arranged at a corner close to the periphery (periphery) of the large plate 250 and adjacent to each other is a rectangular portion. 256 and the rectangular portion 257.

Note that the peripheral portion 265 functions as a peripheral portion of the rectangular portion 256 or as a peripheral portion of the rectangular portion 257, and two peripheral portions may overlap each other, and the two rectangular portions 256 and 257 may be overlapped. One peripheral part may be shared.
In the four rectangular portions 256 to 259 adjacent to each other in both directions of the matrix direction, the peripheral portions 269 arranged at the corners adjacent to each other are formed so as to straddle the four rectangular portions 256 to 259. Note that the peripheral portion 269 also functions as the peripheral portion of the rectangular portion 256, the peripheral portion of the rectangular portion 257, the peripheral portion of the rectangular portion 258, and the peripheral portion of the rectangular portion 259. May be overlapped, or four rectangular portions 256 to 259 may share one peripheral portion.

The arrangement of the rectangular portions 256 to 259 and the surrounding portions 261 to 269 having the above-described configuration can be carried out by applying a plurality of times (here, four times) (four strokes) as shown in FIG. .
In the first and second coatings, two opposing sides in a rectangular region 260 including four display regions 252 to 255 are set as one set, and one set of two sides and other than the one set of two sides The frit paste 130 is applied to each set so as to have a rectangular shape including two sides located outside the two sides.

In the third application and the fourth application, the frit paste 130 is applied between the display areas 252, 253, 254, and 255 adjacent to each other in the matrix direction so as to form a long rectangular shape in the adjacent direction.
Specifically, as shown in FIG. 19 (b), the first application is performed by taking the two long sides facing each other of the rectangular region 260 as a pair, as shown by the solid line. The frit paste 251a is applied so as to have a rectangular shape including the side portion and two sides located outside the other two sides facing the region 260.

As shown by the broken line, the second application is a set of two short side portions facing each other in the rectangular region 260, and is outside the two short side portions and the other two sides facing the region 160. The frit paste 251b is applied so as to have a rectangular shape including the other two sides positioned at.
The third coating is a frit so as to have a long rectangular shape in the column direction, which is the adjacent direction, between the display regions 252 and 255 adjacent to each other in the column direction and the display regions 253 and 254, respectively, as indicated by a dashed line. A paste 251c is applied.

As shown by a two-dot chain line, the fourth coating is a frit so as to have a long rectangular shape in the row direction which is the adjacent direction between the display regions 252 and 253 and the display regions 255 and 254 adjacent in the row direction. A paste 251d is applied.
3. Other Forms In the above configuration, all the peripheral portions 203 to 206 are extended from one end of each side portion 207 to 210 constituting the rectangular portion 202 as they are and arranged in parallel with the side portions 207 to 210 having the one end. However, it is not necessary that all the peripheral portions are continuous with one end of the other side portion. Non-continuous examples will be described below as modified examples 2-1 and 2-2 of the second embodiment.

FIG. 20 is a diagram showing a modification according to the second embodiment, (a) is a schematic diagram of the applied frit paste according to modification 2-1 and (b) is a modification 2-2. It is the schematic of the apply | coated frit paste.
(1) Modification 2-1
As shown in FIG. 20A, the frit paste 271 is applied to the substrate 270 so as to have a rectangular portion 272 and a plurality (here, two) of peripheral portions 273 and 274.

  The rectangular portion 272 surrounds the rectangular display area 275 and has a rectangular shape in plan view. The rectangular portion 272 is composed of four side portions, and a pair of long side portions 275 and 276 extending along the longitudinal direction to the display region 275 and a pair of short side portions extending along the short side direction. 277 and 278 in a state orthogonal to each other. Note that it is not necessary to distinguish between the long side and the short side, and when the long side / short side portions 275, 276, 277, 278 are represented, the side portions 275 to 278 are simply used.

The peripheral portions 273 and 274 are arranged outside the rectangular portion 272. The peripheral portion 273 extends from one end (here, the left end) of the pair of long side portions 275, 276 and is connected thereto, and the peripheral portion 274 is the other end (here, the pair of long side portions 275, 276). The right ends are connected).
The peripheral portions 273, 274 are first straight portions 273a, 274a parallel to the short side portions 277, 278 of the rectangular portion 272, the ends of the first straight portions 273a, 274a and the ends of the long side portions 275, 276, respectively. Are curved first curve portions 273b and 274b and second curve portions 273c and 274c.
(2) Modification 2-2
As shown in FIG. 20B, the frit paste 281 includes a rectangular portion 272 and a plurality of (here, six) peripheral portions 273, 274, 282, and 283 arranged outside the rectangular portion 272. , 284, 285.

The rectangular portion 272 and the surrounding portions 273 and 274 have the same configuration as the rectangular portion 272 and the surrounding portions 273 and 274 described in Modification 2-1. In addition, when it is not necessary to distinguish the surrounding parts 282, 283, 284, and 285, it represents as the surrounding parts 282 to 285.
The peripheral portions 282 to 285 extend from the ends of the short side portions 277 and 278 of the rectangular portion 272 in the extending direction of the short side portions 277 and 278 and are adjacent to the short side portions 277 and 278. , 276 so as to approach the center side of the long side portions 275, 276, and then change so as to approach the long side portions 275, 276 in a curved manner. 275,276.

In other words, each of the peripheral portions 282 to 285 includes the first straight portions 282a to 285a parallel to the long side portions 275 and 276, the ends of the short side portions 277 and 278 extending from the peripheral portions 282 to 285, and the first portion. First curved curve portions 282b to 285b that connect one ends of the straight line portions 282a to 285a (the ends on which the peripheral portions 282 to 285 extend and the short side portions 277 and 278 are located); Curved second curved line portions 282c to 282c connecting the other ends of the straight line portions 282a to 285a and the long side portions 275 and 276 including the ends of the short side portions 277 and 278 extending from the peripheral portions 282 to 285. 285c.
<Third Embodiment>
The peripheral portion in the first embodiment is an other side (for example, a short side portion) that extends from an end of one side (for example, a long side portion) constituting the rectangular portion and is adjacent to the one side. ) Is continuous at the end.

The peripheral part in the second embodiment extends from one end of one side (for example, a long side part) constituting the rectangular part and continues to one end of the other side arranged in parallel with the one side.
However, the peripheral portion extends from one end of one side (for example, a long side portion) constituting the rectangular portion and continues to the other end of the one side, and one side in the first peripheral portion. A second peripheral portion that extends from one end of another side different from the other side and that is continuous with the other end of the other side that is arranged in parallel with the other side.
1. Configuration (shape)
FIG. 21 is a schematic perspective view of a coated frit paste according to the third embodiment.

As shown in FIG. 21, the frit paste 301 includes a rectangular portion 302 and a plurality of (herein, four) peripheral portions 303, 304, 305, and 306 (hereinafter referred to as “peripheral portions 303 to 306”). It is applied to the substrate 300 so as to have In the present embodiment, the peripheral portions 303 and 304 are defined as first peripheral portions 303 and 304, and the peripheral portions 305 and 306 are defined as second peripheral portions 305 and 306.
(1) Rectangular portion The rectangular portion 302 surrounds a rectangular display region 131 in which a plurality of light emitting elements are formed, and has a rectangular shape in plan view. The rectangular portion 302 has a pair of long side portions 307 and 308 and a pair of short side portions 309 and 310. Note that it is not necessary to distinguish between the long side and the short side, and when the long side / short side portions 307, 308, 309, 310 are represented, they are simply referred to as the side portions 307 to 310.
(2) Peripheral portion The first peripheral portions 303 and 304 extend from one end of the long side portions 307 and 308 as they are, while extending the extending direction of the long side portions 307 and 308 as they are, It extends linearly and continues to the other end of the long side portions 307 and 308 having one end.

Here, although each of the first peripheral portions 303 and 304 has a different location, the basic configuration is the same, so the peripheral portion 303 will be described in detail.
For example, after the first peripheral portion 303 extends from one end 311 of the long side portion 307, the first peripheral portion 303 is folded back so as to be continuous with a linear portion that is spaced outward and parallel to the long side portion 307, and extends the linear portion. Thereafter, the long side portion 307 is folded back to be continuous with the other end 312.

To explain structurally, the first peripheral portion 303 has a “U” shape such that the opening side is located in the rectangular portion 302 in a plan view, and the first folded portion 313, the first straight portion 314, and the second folded portion. It has the part 315 in this order. That is, both ends of the first straight line portion 314 are connected to the long side portion 307 of the rectangular portion 302 via the first folded portion 313 and the second folded portion 315.
The first folded portion 313 and the second folded portion 315 are stretched as they are from the ends 311 and 312 of the long side portion 307 in the extending direction of the long side portion 307 (this portion is the first straight regions 313a and 315a). ) And then changes to the outside (the side opposite to the display region 131 when the long side portion 307 is used as a reference) (this portion is the first curved regions 313b and 315b) and is straight. After extending (this portion is the second linear regions 313c and 315c), it changes inwardly again (this portion is the second curved regions 313d and 315d). The first curved areas 313b and 315b and the second curved areas 313d and 315d have an arc shape that is a quarter of a circle in plan view.
2. In the above example, the frit paste 301 disposed on the substrate 300 having one display area 131 has been described. That is, the case where one display panel is manufactured from one intermediate panel has been described.

However, the above example can also be applied to multi-chamfering, and an example of multi-chamfering will be described below.
FIG. 22 is a diagram illustrating the application of frit paste when the display panel is multi-faceted. (A) is the figure which showed the rectangular part of the apply | coated frit paste with the continuous line, and the surrounding part was shown with the broken line, (b) is a figure explaining the application | coating method of frit paste.

As shown in FIG. 22A, the large plate 320 is a substrate (for example, a glass substrate) having four display areas 322, 323, 324, and 325 here. Note that the four display areas are arranged in a matrix (in this case, 2 rows and 2 columns), and when there is no need to distinguish each display area, the display areas are represented as display areas 322 to 325.
A frit paste 321 is applied to the display area 322 to 325 on the surface of the large plate 320. Application of the frit paste 130 is performed so that rectangular portions 326 to 329 surrounding the display regions 322 to 325 and peripheral portions 331 to 339 disposed outside the rectangular portions 326 to 329 are formed.

Five peripheral portions 331 to 339 are arranged around the rectangular portions 326 to 329. Specifically, surrounding portions 331, 333, 335, 336, and 339 are arranged around the rectangular portion 326. Here, the region 330 includes four rectangular portions.
The short side of the region 330 includes an outer short side in the rectangular part 328 and the rectangular part 329 and an outer short side in the rectangular part 326 and the rectangular part 327. The long side of the region 330 includes an outer long side in the rectangular part 329 and the rectangular part 326 and an outer long side in the rectangular part 328 and the rectangular part 327.

The peripheral portions 331 and 332 extend from each end of one short side of the pair of short sides of the region 330, and each of the other short sides of the region 330 has a curved portion or a straight portion in the middle. Continuous at the edge. The peripheral portions 333 and 334 extend from one end of each long side of the region 330 and are connected to the other end of each long side while having a curved portion or a straight portion in the middle.
The peripheral portions 335, 336, 337, and 338 are arranged across two rectangular portions 326 to 329 adjacent in the row direction or the column direction, and one of the two long and short sides facing each other of the adjacent rectangular portions 326 to 329 is Extending from the ends located outside the long and short sides of the rectangular portions 326 to 329, and connected to the ends located outside the long and short sides of the other rectangular portions 326 to 329 while having curved portions and straight portions. To do.

The peripheral portion 339 is disposed across the four rectangular portions 326 to 329 adjacent in the matrix direction, and extends from the corner portion of the rectangular portion so as to pass through four opposite corner portions of the four rectangular portions.
The peripheral portions 335 to 338 function as a peripheral portion of one rectangular portion of two rectangular portions adjacent to each other in the row direction or the column direction, and also function as a peripheral portion of the other rectangular portion. They may be overlapped, or two rectangular parts may share one peripheral part 335-338.

The peripheral portion 339 also functions as a peripheral portion of each of the four rectangular portions adjacent to each other in the matrix direction, and the four peripheral portions may overlap each other. Two peripheral portions 339 may be shared.
The arrangement of the rectangular portions 326 to 329 and the peripheral portions 331 to 339 having the above-described configuration can be implemented by applying a plurality of times (here, 5 times) (5 strokes) as shown in FIG. .

First, as shown by a solid line, the first application is a pair of sides (here, peripheral portions 331, 332) in a region 330 including all of the plurality (four in this case) of rectangular portions 326 to 329. And the frit paste 321a is applied in correspondence with the peripheral portions 331 and 332.
As shown by the broken lines, the second and third coatings are a pair of sides (here, the peripheral portions 331 and 332) in the region 330 including all the rectangular portions 326 to 329 (four in this case). , 333, 334)) and frit pastes 321b, 321c corresponding to the peripheral portions 333, 334 are applied.

In the fourth application, a frit paste 321d is applied between the display regions 222 to 225 adjacent in the column direction so as to have a long rectangular shape in the row direction indicated by a one-dot chain line.
In the fifth application, a frit paste 321e is applied between display areas adjacent in the row direction so as to have a long rectangular shape in the column direction indicated by a two-dot chain line.
In addition, the order of the 1st-5th application | coating may be the order of this number, and another order.
3. Other Forms In the above configuration, all the surrounding portions 303 to 306 are changed in a curvilinear direction after extending from one end of each of the side portions 307 to 310 constituting the rectangular portion 302. The surrounding part does not need to have a curved part. An example having no curved portion will be described below as modified examples 3-1 and 3-2 of the third embodiment.

FIG. 23 is a view showing a modified example according to the third embodiment, (a) is a schematic diagram of the applied frit paste according to modified example 3-1, and (b) is a modified example 3-2. It is the schematic of the apply | coated frit paste.
(1) Modification 3-1
As shown in FIG. 23A, the frit paste 351 has a rectangular portion 352 and a plurality of (here, four) peripheral portions 353, 354, 355, 356, 357, 358 so as to have a substrate 350. Has been applied.

The rectangular portion 352 has the same configuration as the rectangular portion in each embodiment. The rectangular portion 352 has a pair of long side portions 359 and 360 and a pair of short side portions 361 and 362 in a state of being orthogonal to each other. It is not necessary to distinguish between the long side and the short side, and when representing the long side / short side portions 359, 360, 361, 362, they are simply referred to as the side portions 359 to 362.
The peripheral portions 353 and 354 have the same configuration as the peripheral portions 303 and 304 in the third embodiment, and extend from one end of the pair of long side portions 359 and 360, respectively, and the long side portions 359 and 360 including the one end. Connect to the other end.

The peripheral portions 355, 356, 357, and 358 extend from the ends of the short side portions 361 and 362 as they are and continue to the peripheral portions 353 and 354.
(2) Modification 3-2
As shown in FIG. 23B, the frit paste 371 has a rectangular portion 372 and a plurality of (here, four) peripheral portions 373, 374, 375, 376, 377, and 378. 370 is applied.

The rectangular portion 372 includes a pair of long side portions 379 and 380 and a pair of short side portions 381 and 382 in a state of being orthogonal to each other, similarly to the modified example 3-1. Note that it is not necessary to distinguish between the long side and the short side, and when the long side / short side portions 379, 380, 381, and 382 are represented, they are simply referred to as the side portions 379 to 382.
The peripheral portions 373 and 374 have basically the same configuration, although the side portions extending from the peripheral portions 303 and 304 in the third embodiment are different, and extend from one end of the pair of short side portions 381 and 382, respectively. Then, it is connected to the other end of the short side portions 381 and 382 including the one end.

The peripheral portions 375, 376, 377, and 378 extend as they are from the ends of the long side portions 379 and 380 and continue to the peripheral portions 373 and 374, respectively.
<Fourth Embodiment>
The peripheral portion in the third embodiment has first peripheral portions 303 and 304 for two sides 307 and 308 among the four sides 307 to 310 constituting the rectangular portion 302.

In the fourth embodiment, a peripheral portion extending from one end of all four sides constituting the rectangular portion and continuing to the other end of the one side will be described.
1. Configuration (shape)
FIG. 24 is a schematic perspective view of a coated frit paste according to the fourth embodiment.
As shown in FIG. 24, the frit paste 401 includes a rectangular portion 402 and a plurality (here, four) of peripheral portions 403, 404, 405, and 406 (hereinafter referred to as “peripheral portions 403 to 406”). It is applied to the substrate 400 so as to have

Similar to the first embodiment, the rectangular portion 402 has a rectangular shape in plan view, and has a pair of long side portions 407 and 408 and a pair of short side portions 409 and 410 in a state of being orthogonal to each other. Note that it is not necessary to distinguish between the long side and the short side, and when the long side / short side portions 407, 408, 409, 410 are represented, they are simply referred to as side portions 407-410.
The peripheral portions 403 to 406 extend from one end of each side portion 407 to 410, have a curved portion and a straight portion, and continue to the other end of each side portion 407 to 410 having the one end.

Here, although the surrounding portions 403 to 406 are arranged in different locations, the basic configuration is the same, so the surrounding portion 405 will be described in detail.
For example, the peripheral portion 405 extends from one end 411 of the long side portion 408 in the direction in which the long side portion 408 extends, and then continues to a straight line portion that is spaced outward and parallel to the long side portion 408. After being folded and extending the linear portion, it is folded back so as to be continuous with the other end 412 of the long side portion 408.

Explaining structurally, the peripheral portion 405 has a “U” shape such that the opening side is positioned in the rectangular portion 402 in plan view, and the first folded portion 413, the first straight portion 414, and the second folded portion 415. And in this order. That is, both ends of the first linear portion 414 are connected to the long side portion 408 of the rectangular portion 402 via the first folded portion 413 and the second folded portion 415.
The first folded portion 413 and the second folded portion 415 are stretched as they are from the ends 411 and 412 of the long side portion 408 in the extending direction of the long side portion 408 (this portion is the first straight regions 413a and 415a). ) And then changes to the outside (the side opposite to the display region 131 when the long side portion 408 is used as a reference) (this portion is the first curved regions 413b and 415b) and is straight as it is. After extending (this portion is the second linear regions 413c and 415c), it changes inwardly again (this portion is the second curved regions 413d and 415d). The first curved areas 413b and 415b and the second curved areas 413d and 415d have an arc shape that is a quarter of a circle in plan view.
2. In the above example, the frit paste 401 disposed on the substrate 400 having one display area 131 has been described. That is, the case where one display panel is manufactured from one intermediate panel has been described.

However, the above example can also be applied to multi-chamfering, and an example of multi-chamfering will be described below.
FIG. 25 is a diagram for explaining the application of frit paste when the display panel is multi-faceted, (a) is a diagram showing a rectangular portion of the applied frit paste with a solid line and a surrounding portion with a broken line, (B) is a figure explaining the application method of a frit paste.

As shown in FIG. 25A, the large plate 420 is a substrate (for example, a glass substrate) having four display regions 422, 423, 424, and 425. Note that the four display areas are arranged in a matrix (in this case, two rows and two columns), and when there is no need to distinguish each display area, it is represented as display areas 422 to 425.
A frit paste 421 is applied to the display area 422 to 425 on the surface of the large plate 420. Application of the frit paste 421 includes rectangular portions 426 to 429 that surround the display regions 422 to 425, and peripheral portions 431, 432, 433, 434, 435, 436, 437, which are disposed outside the rectangular portions 426 to 429. 438, 439 are formed.

Here, the region 430 includes four rectangular portions. The four peripheral portions 431, 432, 433, and 434 have the same basic configuration, and are expressed as the peripheral portions 431 to 434 when it is not necessary to distinguish them. The four peripheral portions 435, 436, 437, and 438 have the same basic configuration, and are expressed as the peripheral portions 435 to 438 when it is not necessary to distinguish them.
The short side of the region 430 includes an outer short side in the rectangular part 428 and the rectangular part 429 and an outer short side in the rectangular part 426 and the rectangular part 427. The long side of the region 430 includes an outer long side in the rectangular portion 429 and the rectangular portion 426 and an outer long side in the rectangular portion 428 and the rectangular portion 427.

The peripheral portions 431 to 434 extend from the ends of the long and short sides of the region 330, and continue to the other ends of the same long and short sides while having curved portions and straight portions in the middle.
The peripheral portions 435 to 438 are arranged across two rectangular portions 426 to 429 adjacent in the row direction or the column direction, and the rectangular portions 426 to 429 are in two long and short sides facing each other of the adjacent rectangular portions 426 to 429. It extends from the end located on the outside of one of the long and short sides, and is connected to the other long and short sides of the rectangular portions 426 to 429 while having a curved portion and a straight portion.

The peripheral portion 439 is disposed across the four rectangular portions 426 to 429 adjacent in the matrix direction, and the corner portions of the rectangular portions 426 to 429 pass through the four opposite corner portions of the four rectangular portions 426 to 429. It extends from.
The peripheral portions 435 to 438 function as a peripheral portion of one rectangular portion of the two rectangular portions 426 to 429 adjacent in the row direction or the column direction, and also function as a peripheral portion of the other rectangular portion. Two portions may be overlapped, or one rectangular portion 435 to 438 may be shared by two rectangular portions.

The peripheral portion 439 also functions as a peripheral portion of each of the four rectangular portions 426 to 429 adjacent to each other in the matrix direction, and the four peripheral portions may overlap each other. One peripheral part 439 may be shared by 429.
The arrangement of the rectangular portions 426 to 429 and the surrounding portions 431 to 439 having the above-described configuration can be implemented by applying a plurality of times (here, 6 times) (6 strokes) as shown in FIG. .

First, as shown by the solid line, the first and second coatings are performed between adjacent rectangular portions 426 to 429 so that the long and short sides of the adjacent rectangular portions 426 to 429 are arranged in the row / column direction. The frit pastes 421a and 421b are applied to the substrate.
In the third and fourth coatings, as indicated by the one-dot chain line, the frit pastes 421c and 421d are applied corresponding to the long sides of the region 430 and the peripheral portions 431 and 433 extending from the long sides.

In the fifth and sixth coatings, as indicated by the two-dot chain line, the frit pastes 421f and 421e are applied corresponding to the short sides of the region 430 and the peripheral portions 432 and 434 extending from the short sides.
<Fifth Embodiment>
In the first to fourth embodiments, the dispenser device is used to apply the frit paste 130. However, other methods such as screen printing may be used.

FIGS. 26A and 26B are schematic plan views of the applied frit paste according to the fourth embodiment. FIG. 26A shows the case of single chamfering, and FIG. 26B shows the case of multi-chamfering.
(1) One-side Chamfering As shown in FIG. 26A, the frit paste 501 includes a rectangular portion 502 and a plurality of (here, four) surrounding portions 503, 504, 505, 506, 507, 508, 509, 510, and 511 (hereinafter referred to as “peripheral portions 503 to 511”) are applied to the substrate 500.

The peripheral portion 503 is arranged in a rectangular shape with a predetermined interval from the rectangular portion 502. In addition, the corner | angular part of the rectangular surrounding part 503 is curvilinearly changed with the predetermined | prescribed diameter so that the thermal stress at the time of baking may not remain locally, as shown to (a) of FIG.
The peripheral portions 504 to 511 are portions extended from the respective ends of the side portions 512 to 515 constituting the rectangular portion 502 until reaching the peripheral portion 503.
(2) Multi-face milling As shown in FIG. 26B, the frit paste 521 includes four rectangular portions 527 to 530 arranged along the four display areas 523 to 526, and the rectangular portions 527 to 530. It is applied to the substrate 500 so as to have peripheral portions 531 to 555 provided on the outside.

The peripheral portion 531 is an area including the four rectangular portions 527 to 530 and is arranged in a rectangular shape with a predetermined interval from the rectangular portions 527 to 530. In addition, the corner | angular part of the rectangular surrounding part 531 is curvilinearly changed with the predetermined | prescribed diameter so that the thermal stress at the time of baking may not remain locally, as shown in FIG.26 (b).
The peripheral portions 532 to 547 are portions extending from the side portion where the peripheral portion 531 exists on the extension of the side portion to the peripheral portion 531 among the side portions constituting the respective rectangular portions 527 to 530.

Peripheral portions 548 to 555 extend from the side portions where other rectangular portions 527 to 530 exist on the extension of the side portions to the other rectangular portions 527 to 530 among the side portions constituting the respective rectangular portions 527 to 530. It is an extended part.
When the dispenser apparatus described in the first embodiment is used, the frit paste 521 having the above shape needs to be applied nine times with the frit paste 130, and the application start position of each part and the previously applied part If there is a gap, it takes time to apply the frit paste 130, and the nozzle movement program becomes complicated.
<Modification>
1. Manufacturing Method (1) Paste-Applied Substrate In the embodiments and the like, the frit paste 130 is applied to the glass substrate for the CF substrate, but the frit paste applying step may be performed on the substrate for the EL substrate. In this case, an EL element may be formed after the frit integration step.
(2) Frit Integration Step In the frit integration step, the glass frit in the frit paste 145 and the glass substrate 121 are welded using the laser 132, but may be welded by other methods. As another method, a glass substrate with frit paste is placed in a heating furnace and heated to a temperature at which the glass frit (sealing material) melts, thereby integrating the sealing material and the substrate. it can.
(3) CF formation process The CF formation process is performed after the frit integration process. However, when the heating in the frit integration step is performed by the laser 132, the portion to be heated in the glass substrate is small, and the influence of heat on the CF 122a can be reduced. For this reason, the CF forming step can be performed before the frit integration step performed using a laser, or can be performed before the frit paste 145 application step.

That is, when a laser is used as a means for melting the glass frit, the CF process may be performed in the order of the CF forming process, the frit paste applying process, and the frit integrating process, or the frit paste applying process and the CF forming process. You may perform in order of a process and a frit integration process.
2. Peripheral portion In the embodiment, the side portion constituting the rectangular portion is extended and the extending direction is changed in a curved manner, but the extending direction may be changed linearly.

Specifically, in the embodiment, the arc has been changed to an arc shape, but the extension direction may be changed in a shape so as to form a part of a polygonal shape such as an octagonal shape. Further, the folded portions 313 and 315 of the peripheral portion 303 in the third embodiment may be folded in a semicircular shape or folded in a semi-elliptical shape.
3. Paste The application form of paste has been described in the above-described embodiments (including modifications), but the peripheral portions described in each embodiment may be variously combined.
4). In the multi-planar embodiment, a case where a total of four display panels of 2 rows and 2 columns is acquired from one large board as an example of multi-planar layout has been described. However, the display panels are arranged other than 2 rows and 2 columns. Alternatively, the number may be other than four.

  The present invention can be widely used to apply a paste to a first substrate.

DESCRIPTION OF SYMBOLS 10 Display panel 11 EL board | substrate 12 CF board | substrate 13 Sealing resin layer 145 Frit paste 151 Rectangular part 152-155 Surrounding part

Claims (8)

A first step of providing a rectangular portion surrounding the display region and a plurality of peripheral portions arranged on the outer periphery of the rectangular portion on the first substrate using a sealing material;
A second step of bonding the first substrate and the second substrate through the sealing material to seal the display region,
The manufacturing method of a display panel, wherein the peripheral portion is provided so as to extend one end side of one side constituting the rectangular portion and to connect the extended end to the rectangular portion or another peripheral portion. . The method of manufacturing a display panel according to claim 1, wherein the peripheral portion is provided such that the extending direction thereof is changed and the extended end is connected to one end of the rectangular portion. 2. The method of manufacturing a display panel according to claim 1, wherein the peripheral portion is provided such that the extension direction thereof is changed and the extension end is connected to an end of another side opposite to the one side. The method of manufacturing a display panel according to claim 2, wherein the peripheral portion is provided so that its extension direction is changed and the extension end is connected to the other end of the one side. 3. The display panel manufacturing method according to claim 2, wherein the peripheral portion is provided so as to change an extension direction thereof so that the extension end is connected to another adjacent side through one end of the one side. Method. A third step of forming a scribe line on each of the bonded first substrate and second substrate;
The method of manufacturing a display panel according to claim 2, wherein the scribe line crosses at least a part of the peripheral portion. A first step of providing, on a first substrate having a plurality of display areas, a plurality of rectangular portions surrounding each display area and a peripheral portion disposed around the outside of the rectangular portions using a sealing material;
Bonding the first substrate and the second substrate through the sealing material, and sealing the plurality of display regions,
The peripheral portion is provided so as to extend one end side of one side constituting the rectangular portion of the plurality of rectangular portions and to connect the extended end to the plurality of rectangular portions or other peripheral portions. A display panel manufacturing method characterized by the above. The method for manufacturing a display panel according to claim 1, wherein the sealing material is a glass frit.

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