ORGANIC LIGHT-EMITTING DEVICE AND ORGANIC DISPLAY APPARATUS

• US 20160190514A1
• Filed: 11/21/2015
• Published: 06/30/2016
• Est. Priority Date: 12/24/2014
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Inventors: MASUDA, HIROYUKI
• Granted Patent: US 9,818,981 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H10K 2102/3026 Top emission
• CPC Class Codes: H10K 2102/351 Thickness
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/846 comprising getter material or desiccants
• CPC Class Codes: H10K 50/854 comprising scattering means
• CPC Class Codes: H10K 50/858 comprising refractive means, e.g. lenses
• CPC Class Codes: H10K 50/86 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/8722 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 59/874 including getter material or desiccant
• CPC Class Codes: H10K 59/877 comprising scattering means
• CPC Class Codes: H10K 59/879 comprising refractive means, e.g. lenses
• CPC Class Codes: H10K 59/8791 Arrangements for improving contrast, e.g. preventing reflection of ambient light

Abstract

A display panel includes an EL panel part, a CP panel part, and a resin layer. Light is extracted from a luminous part including an organic luminous layer in the EL panel part in a direction of an arrow. The CP panel part includes a circular polarizing film. The resin layer is formed to cover an upper surface of the EL panel part, has a layer thickness of 15 μm, and includes a resin part and a plurality of getter particles dispersed in the resin part. The getter particles are dispersed at a density at which the getter particles do not overlap one another in plan view.

Claims

1. An organic light-emitting device comprising:

a first panel;

a second panel disposed to face the first panel with a gap between the first panel and the second panel; and

a coating layer inserted between the first panel and the second panel so as to contact the first panel and the second panel,

wherein

the first panel comprises a first substrate and a luminous part formed on one of main surfaces of the first substrate, the luminous part comprising an organic layer in structure and emitting light opposite to the first substrate,

the second panel comprises a second substrate and a circular polarizing film disposed in a region through which the light emitted from the luminous part of the first panel passes,

the coating layer comprises a resin part that transmits the light emitted from the luminous part and a plurality of particles dispersed in at least some region of the resin part,

each of the plurality of particles is formed of a material selected from the group consisting of synthetic zeolite, aluminum oxide, calcium chloride, calcium oxide, active anhydrous calcium sulfate, magnesium oxide, magnesium perchlorate, magnesium sulfate, phosphorus oxide, potassium carbonate, potassium hydroxide, silica gel, sodium hydroxide, sodium sulfate, and zinc chloride,

when a particle size parameter is plotted on a horizontal axis and scattering efficiency is plotted on a vertical axis, an average particle size D50 of the plurality of particles is set in a range equal to or greater than a value of the particle size parameter at which the scattering efficiency becomes maximum,

a layer thickness of the coating layer is not less than 10 μ

m and not more than 20 μ

m, and

the plurality of particles in the resin part are dispersed at a density at which the particles do not overlap one another when the second panel is viewed in plan view.

2. The organic light-emitting device according to claim 1, wherein the plurality of particles in the coating layer are dispersed in the at least some region at a density at which a total surface area per 1 cm² is 0.2 cm² or less.

3. The organic light-emitting device according to claim 1, wherein the circular polarizing film is disposed to cover a main surface on a first panel side of the second substrate, and comprises a first main surface contacting the second substrate and a second main surface contacting the coating layer.

4. The organic light-emitting device according to claim 1, wherein the average particle size D50 of the plurality of particles satisfies a relationship of 0.4 μ

m≦

D50≦

10 μ

m.

5. The organic light-emitting device according to claim 1, wherein the average particle size D50 of the plurality of particles satisfies a relationship of 3 μ

m≦

D50≦

10 μ

m.

6. The organic light-emitting device according to claim 1, wherein

a refractive-index ratio of the plurality of particles to the resin part is 1.3 or more, and

the average particle size D50 of the plurality of particles is 0.5 μ

m or more.

7. An organic display apparatus comprising:

a display panel; and

a control-drive circuit connected to the display panel,

wherein

the display panel is an organic light-emitting device comprises;

a first panel;

a second panel disposed to face the first panel with a gap between the first panel and the second panel; and

a coating layer inserted between the first panel and the second panel so as to contact the first panel and the second panel,

the first panel comprises a first substrate and a luminous part formed on one of main surfaces of the first substrate, the luminous part comprising an organic layer in structure and emitting light opposite to the first substrate,

the second panel comprises a second substrate and a circular polarizing film disposed in a region through which the light emitted from the luminous part of the first panel passes,

the coating layer comprises a resin part that transmits the light emitted from the luminous part and a plurality of particles dispersed in at least some region of the resin part,

each of the plurality of particles is formed of a material selected from the group consisting of synthetic zeolite, aluminum oxide, calcium chloride, calcium oxide, active anhydrous calcium sulfate, magnesium oxide, magnesium perchlorate, magnesium sulfate, phosphorus oxide, potassium carbonate, potassium hydroxide, silica gel, sodium hydroxide, sodium sulfate, and zinc chloride,

when a particle size parameter is plotted on a horizontal axis and scattering efficiency is plotted on a vertical axis, an average particle size D50 of the plurality of particles is set in a range equal to or greater than a value of the particle size parameter at which the scattering efficiency becomes maximum,

a layer thickness of the coating layer is not less than 10 μ

m and not more than 20 μ

m, and

the plurality of particles in the resin part are dispersed at a density at which the particles do not overlap one another when the second panel is viewed in plan view.