ORGANIC LIGHT-EMITTING DEVICE AND ORGANIC DISPLAY APPARATUS

• US 20160190517A1
• Filed: 11/24/2015
• 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 9,774,007 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H10K 50/846 comprising getter material or desiccants
• CPC Class Codes: H10K 50/854 comprising scattering means
• CPC Class Codes: H10K 59/874 including getter material or desiccant
• CPC Class Codes: H10K 59/877 comprising scattering means

Abstract

A display panel includes a EL panel part, a CF 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 resin layer is formed to cover an upper surface of the EL panel part. Transmittance of the light from the EL panel part is 80% or higher. The resin layer includes a resin part and a plurality of particles dispersed in the resin part. The particles are formed of synthetic zeolite having a refractive-index ratio to the resin part of 1.0 or more and a particle size of 2 μm or more.

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 main surface of the first substrate, the luminous part comprising an organic layer in structure and emitting light opposite to the first substrate,

the coating layer transmits the light from the luminous part,

a plurality of particles are dispersed in at least some region of the coating layer,

each of the plurality of particles is formed of a material selected from the group consisting of synthetic zeolite, aluminum oxide, calcium oxide, calcium chloride, 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, and

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 is maximum.

2. The organic light-emitting device according to claim 1, wherein a relationship of 0.4 μ

m≦

D50≦

10 μ

m is satisfied.

3. The organic light-emitting device according to claim 1, wherein a relationship of 3 μ

m≦

D50≦

10 μ

m is satisfied.

4. The organic light-emitting device according to claim 1, wherein the plurality of particles are included in the at least some region of the coating layer in quantity corresponding to a total surface area per 1 cm² equal to or less than 0.2 cm².

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

the coating layer includes the plurality of particles dispersed in a resin part made of a resin material, and

the average particle size D50 of the plurality of particles is 2 μ

m or more.

6. The organic light-emitting device according to claim 5, wherein a ratio of a refractive index of the particles to a refractive index of the resin part is 0.97 or more.

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

the coating layer includes the plurality of particles dispersed in a resin part made of a resin material,

a ratio of a refractive index of the particles to a refractive index of 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.

8. The organic light-emitting device according to claim 5, wherein,

when the plurality of particles constitute a first particle group,

a plurality of particles that constitute a second particle group are also dispersed in at least some region of the coating layer, the plurality of particles that constitute the second particle group being different from those that constitute the first particle group,

the particles that constitute the second particle group include any of polyethylene, polypropylene, polymethylpentene, polyvinyl chloride, polytetrafluoroethylene, polystyrene, polymethyl methacrylate, polyethylene terephthalate, polybutylene terephthalate, polyamide, polyimide, polysulfone, polyphenylene oxide, polyacetal, an epoxy resin, a phenol resin, a melamine resin, and an unsaturated polyester resin, or a resin that has a bridged structure and is selected from the group consisting of divinylbenzene polymer, divinylbenzene-styrene copolymer, divinylbenzene-acrylic ester copolymer, diallyl phthalate polymer, and triallyl isocyanurate polymer,

when an average particle size of the plurality of particles that constitute the first particle group is defined as D50₍₁₎ and an average particle size of the plurality of particles that constitute the second particle group is defined as D50₍₂₎,

a relationship of D50₍₂₎>

D50₍₁₎ is satisfied.

9. The organic light-emitting device according to claim 8, wherein a difference in a refractive index between each of the particles that constitute the second particle group and the resin part is smaller than a difference in a refractive index between each of the particles that constitute the first particle group and the resin part.

10. The organic light-emitting device according to claim 8, wherein a relationship of 1 μ

m≦

D50₍₂₎≦

100 μ

m is satisfied.

11. The organic light-emitting device according to claim 8, wherein a relationship of 5 μ

m≦

D50₍₂₎≦

30 μ

m is satisfied.

12. The organic light-emitting device according to claim 8, wherein, when a Cv value of the second particle group is defined as Cv₍₂₎, a relationship of Cv₍₂₎≦

3% is satisfied.

13. The organic light-emitting device according to claim 8, wherein each of the particles that constitute the second particle group has 10% compressive modulus of elasticity within a range from not less than 2 GPa to not more than 6 GPa.

14. The organic light-emitting device according to claim 1, wherein transmittance of the light from the luminous part in the coating layer is 98% or more.

15. An organic display apparatus comprising:

a display panel; and

a control-drive circuit connected to the display panel,

wherein

a device structure 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 main surface of the first substrate, the luminous part comprising an organic layer in structure and emitting light opposite to the first substrate,

the coating layer transmits the light from the luminous part,

a plurality of particles are dispersed in at least some region of the coating layer,

each of the plurality of particles is formed of a material selected from the group consisting of synthetic zeolite, aluminum oxide, calcium oxide, calcium chloride, 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, and

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 is maximum.