Organic light-emitting diode display device

• US 10,644,253 B2
• Filed: 09/19/2018
• Issued: 05/05/2020
• Est. Priority Date: 09/29/2017
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Park, Mi-Kyung, Kim, Young-Wook, Han, Ji-Su
• Primary Examiner(s): Campbell, Shaun M
• Application Number:
  US16/135,424
• Publication Number:
  US 20190103572A1
• Time in Patent Office: 594 Days
• Field of Search: None
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/81 Anodes
• CPC Class Codes: H10K 50/82 Cathodes
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/854 comprising scattering means
• CPC Class Codes: H10K 50/86 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/1213 the pixel elements being TFTs
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 59/87 Passivation; Containers; Encapsulations
• CPC Class Codes: H10K 59/877 comprising scattering means
• CPC Class Codes: H10K 59/8791 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: Y02E 10/549 Organic PV cells

Abstract

An organic light-emitting diode (OLED) display device includes a substrate; a light-emitting diode including a first electrode, an organic emitting layer and a second electrode and disposed on a first side of the substrate; and a foamed polymer layer disposed on a second side of the substrate and including a polymer resin and an air pocket inside the polymer resin.

Claims

1. An organic light-emitting diode display device, comprising:

a substrate;

a light-emitting diode including a first electrode, an organic emitting layer and a second electrode, and disposed on a first side of the substrate; and

a foamed polymer layer disposed on a second side of the substrate and including a polymer resin and an air pocket inside the polymer resin,

wherein the organic light-emitting diode display device includes a red pixel region, a green pixel region, a blue pixel region and a white pixel region,

wherein the air pocket has a first density in at least one of the red pixel region, the green pixel region, or the blue pixel region, and

wherein the air pocket has a second density in the white pixel region, and the second density is greater than the first density.

2. The organic light-emitting diode display device of claim 1, wherein the polymer resin includes one selected from polyimide, polyacrylate, polyethylene ether phthalate, polyethylene naphthalate, polycarbonate, polyarylate, polyetherimide, polyether sulfone, cellulose triacetate, poly(vinylidene chloride), poly(vinylidene fluoride), an ethylene-vinyl alcohol copolymer, and combinations thereof.

3. The organic light-emitting diode display device of claim 1, wherein the foamed polymer layer has a transmittance of about 89%±

3%.

4. The organic light-emitting diode display device of claim 1, wherein the foamed polymer layer has a thickness of about 6 μ

m to about 10 μ

m.

5. The organic light-emitting diode display device of claim 1, wherein the foamed polymer layer has a form of a film, and an adhesive layer is interposed between the foamed polymer layer and the substrate.

6. The organic light-emitting diode display device of claim 5, wherein the foamed polymer layer and the adhesive layer have a transmittance of about 89%±

3%.

7. The organic light-emitting diode display device of claim 5, wherein the foamed polymer layer and the adhesive layer have a thickness of about 6 μ

m to about 10 μ

m.

8. The organic light-emitting diode display device of claim 1, further comprising a polarizer is disposed outside the foamed polymer layer.

9. The organic light-emitting diode display device of claim 8, wherein a thickness of the foamed polymer layer is smaller than a thickness of the polarizer.

10. The organic light-emitting diode display device of claim 1, wherein the air pocket has the first density in the red pixel region, the green pixel region and the blue pixel region.

11. The organic light-emitting diode display device of claim 1, wherein a refractive index of the foamed polymer layer is same as a refractive index of the substrate.

12. The organic light-emitting diode display device of claim 1, wherein the organic light-emitting diode display device further comprises a red color filter in the red pixel region, a green color filter in the green pixel region, and a blue color filter in the blue pixel region.

13. An organic light-emitting diode display device, comprising:

a substrate;

a light-emitting diode including a first electrode, an organic emitting layer and a second electrode, and disposed on a first side of the substrate; and

a foamed polymer layer disposed on a second side of the substrate and including a polymer resin and an air pocket inside the polymer resin,

wherein the organic light-emitting diode display device includes a red pixel region, a green pixel region and a blue pixel region and a white pixel region,

wherein the organic light-emitting diode display device further comprises a red color filter in the red pixel region, and

wherein the air pocked has a first density in the red pixel region and a second density in the white pixel region, and the second density is greater than the first density.