Display panel and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-2017287984-A1
Application number	US-201515508395-A
Country	US
Kind code	A1
Filing date	Aug 27, 2015
Priority date	Sep 3, 2014
Publication date	Oct 5, 2017
Grant date	—

Abstract

A display panel includes an EL panel section, a CF panel section, and a sealing resin layer. In the EL panel section, the surface of a sealing layer has a projected and recessed shape in a Z-axis direction as a whole, wherein a light-emitting region corresponding to a region between banks is a recessed section, and a non-light-emitting region corresponding to a top portion of the bank is a projected section. The sealing resin layer includes a first sealing resin layer and a second sealing resin layer. Prior to performing heating or light irradiation in a step of forming the first and second sealing resin layers, the viscosity of a second non-fluid resin constituting the second sealing resin layer is lower than the viscosity of a first non-fluid resin constituting the first sealing resin layer.

First claim

1 . A method of manufacturing a display panel, comprising:
a step of preparing a first panel section of which a first main surface as a one-side main surface has a projected and recessed shape; a step of preparing a second panel section; a step of disposing a sheet-shaped first non-fluid resin in such a manner that a one-side main surface thereof makes contact with a second main surface as a one-side main surface of the second panel section; a step of disposing a sheet-shaped second non-fluid resin in such a manner that a one-side main surface thereof makes contact with an other-side main surface of the first non-fluid resin; a step of disposing the first panel section in such a manner that the first main surface of the first panel section makes contact with an other-side main surface of the second non-fluid resin; and a step of subjecting the first and second non-fluid resins to heating or light irradiation to impart fluidity to the resins and thereafter curing the resins to thereby form first and second sealing resin layers respectively from the first and second non-fluid resins, wherein prior to performing the heating or light irradiation in the step of forming the first and second sealing resin layers, the viscosity of the second non-fluid resin is lower than the viscosity of the first non-fluid resin.

2 . The method of manufacturing a display panel according to claim 1 ,
wherein the step of disposing the first non-fluid resin and the step of disposing the first panel section are both carried out in a reduced-pressure atmosphere; and after both of the steps are carried out, the second non-fluid resin is in contact with a whole part of the first main surface of the first panel section inclusive of a top portion of a projected section and a bottom portion of a recessed section of the projected and recessed shape of the first main surface, and the first non-fluid resin is in contact with a whole part of the second main surface of the second panel section.

3 . The method of manufacturing a display panel according to claim 1 ,
wherein the difference between the viscosity of the first non-fluid resin and the viscosity of the second non-fluid resin is not less than 1,000 Pas.

4 . The method of manufacturing a display panel according to claim 1 ,
wherein the viscosity of the first non-fluid resin is not more than 35,000 Pas; and the viscosity of the second non-fluid resin is not less than 15,000 Pas.

5 . The method of manufacturing a display panel according to claim 1 ,
wherein the first panel section has a substrate, and a light-emitting region and a non-light-emitting region which are located over the substrate and are adjacent to each other in plan view; and a recessed section of the projected and recessed shape of the first main surface corresponds to the light-emitting region, whereas a projected section of the projected and recessed shape of the first main surface corresponds to the non-light-emitting region.

6 . The method of manufacturing a display panel according to claim 1 ,
wherein the second main surface of the second panel section is flatter than the first main surface of the first panel section.

7 . A method of manufacturing a display panel, comprising:
a step of preparing a first panel section of which a first main surface as a one-side main surface has a projected and recessed shape; a step of preparing a second panel section; a step of disposing a sheet-shaped first non-fluid resin in such a manner that a one-side main surface thereof makes contact with a second main surface as a one-side main surface of the second panel section; a step of disposing a sheet-shaped second non-fluid resin in such a manner that a one-side main surface thereof makes contact with an other-side main surface of the first non-fluid resin; a step of disposing a sheet-shaped third non-fluid resin in such a manner that a one-side main surface thereof makes contact with an other-side main surface of the second non-fluid resin; a step of disposing the first panel section in such a manner that the first main surface thereof makes contact with an other-side main surface of the third non-fluid resin; and a step of subjecting the first, second and third non-fluid resins to heating or light irradiation to impart fluidity to the resins and thereafter curing the resins to thereby form first, second and third sealing resin layers respectively from the first, second and third non-fluid resins, wherein prior to performing the heating or light irradiation in the step of forming the first, second and third sealing resin layers, the viscosity of the second non-fluid resin is higher than the viscosities of the first non-fluid resin and the third non-fluid resin.

8 . The method of manufacturing a display panel according to claim 7 ,
wherein the difference between the viscosity of the second non-fluid resin and the viscosities of the first non-fluid resin and the third non-fluid resin is not less than 1,000 Pas.

9 . The method of manufacturing a display panel according to claim 7 ,
wherein the viscosity of the second non-fluid resin is not more than 35,000 Pas.

10 . The method of manufacturing a display panel according to claim 7 ,
wherein the first panel section has a substrate, and a light-emitting region and a non-light-emitting region which are located over the substrate and are adjacent to each other in plan view; and a recessed section of the projected and recessed shape of the first main surface corresponds to the light-emitting region, whereas a projected section of the projected and recessed shape of the first main surface corresponds to the non-light-emitting region.

11 . A display panel comprising:
a first panel section of which a first main surface as a one-side main surface has a projected and recessed shape; a second panel section disposed to face the first main surface of the first panel section with a gap therebetween; a sheet-shaped second sealing resin layer which is disposed between the first panel section and the second panel section and of which a one-side main surface is in contact with the first main surface of the first panel section; and a sheet-shaped first sealing resin layer which is disposed between the second panel section and the second sealing resin layer and of which a one-side main surface is in contact with at least the second sealing resin layer, wherein the first sealing resin layer and the second sealing resin layer are formed through a state in which the viscosity of the second sealing resin layer is lower than the viscosity of the first sealing resin layer in a form of being disposed between the first panel section and the second panel section.

12 . The display panel according to claim 11 ,
wherein a second main surface as a one-side main surface of the second panel section has a projected and recessed shape in which a top portion of a projected section protrudes toward the first panel section side more than a bottom portion of a recessed section; the display panel further comprises a sheet-shaped third sealing resin layer which is disposed between the first sealing resin layer and the second panel section, a one-side main surface of which is in contact with an other-side main surface of the first sealing resin layer, and an other-side main surface of which is in contact with the second main surface of the second panel section; and the first sealing resin layer, the second sealing resin layer and the third sealing resin layer are formed through a state in which the viscosity of the third sealing resin layer is lower than the viscosity of the first sealing resin layer in a form of being disposed between the first

Assignees

• Joled Inc

Inventors

• Koresawa Kouhei

Classifications

• H01L2227/323

  Electricity · mapped topic

• H01L27/3246

  Electricity · mapped topic

• H01L27/322 Primary

  Electricity · mapped topic

• H10K59/38

  comprising colour filters or colour changing media [CCM] · CPC title

• H05B33/04 Primary

  Sealing arrangements {, e.g. against humidity} · CPC title