FLEXIBLE DISPLAY PANEL AND METHOD OF MANUFACTURING THE SAME

• US 20140374704A1
• Filed: 10/24/2013
• Published: 12/25/2014
• Est. Priority Date: 06/25/2013
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Song, Seung-Yong, Cho, Sang-Hwan, Kim, Seung-Hun, Choi, Chung-Sock, Kim, Hyun-Ho, Kim, Soo-Youn, Park, Sang-Hyun, JANG, Cheol
• Granted Patent: US 9,087,998 B2
• Time in Patent Office: Days
• US Class Current: 257/40
• CPC Class Codes: H10K 2102/311 Flexible OLED
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 50/8445 multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
• CPC Class Codes: H10K 50/85 Arrangements for extracting light from the devices
• CPC Class Codes: H10K 50/86 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/123 Connection of the pixel electrodes to the thin film transistors [TFT]
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens
• CPC Class Codes: H10K 59/8731 multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
• CPC Class Codes: H10K 59/8792 comprising light absorbing layers, e.g. black layers
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 77/111 Flexible substrates
• CPC Class Codes: Y02E 10/549 Organic PV cells
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

A flexible display panel and a method of manufacturing the same. The flexible display panel includes: a flexible panel including a display region and a non-display region, wherein the display region includes an organic light emitting device; a planarization layer disposed on the flexible panel; and a metal-dielectric layer disposed on the planarization layer and including a metal layer and a dielectric layer.

Claims

1. A flexible display panel, comprising:

a flexible panel comprising a display region and a non-display region, the display region comprising an organic light emitting device;

a planarization layer disposed on the flexible panel; and

a metal-dielectric layer disposed on the planarization layer and comprising a metal layer and a dielectric layer.

2. The flexible display panel of claim 1, wherein the metal-dielectric layer comprises a plurality of the metal layers and the dielectric layers, which are alternately stacked.

3. The flexible display panel of claim 1, wherein the metal-dielectric layer further comprises a metal pattern layer disposed directly on the planarization layer and having a thickness equal to or greater than the thicknesses of the metal layer and the dielectric layer, and

wherein the lowest one of the plurality of dielectric layers covers the metal pattern and separates the metal pattern from the metal layer.

4. The flexible display panel of claim 3, wherein the metal pattern layer is disposed directly above a non-emission region in the display region.

5. The flexible display panel of claim 1, further comprising a black matrix layer disposed on the metal-dielectric layer.

6. The flexible display panel of claim 5, wherein the black matrix layer is disposed directly above a non-emission region in the display region.

7. The flexible display panel of claim 1, further comprising a touch screen panel and a window layer disposed on the metal-dielectric layer.

8. The flexible display panel of claim 1, wherein the planarization layer comprises at least one material selected from the group consisting of SiO₂, TiO₂, ZrO₂, Ta₂O₅, HfO₂, Al₂O₃, ZnO, Y₂O₃, BeO, MgO, PbO₂, WO₃, VOX, SiNx, AlNx, ZnS, CdS, SiC, SiCN, LiF, CaF₂, MgF₂, NaF, BaF₂, PbF₂, LaF₃, and GaP.

9. The flexible display panel of claim 1, wherein the planarization layer comprises at least one material selected from the group consisting of an epoxy-based resin, an acryl-based resin, a perylene-based resin, and a polyimide resin.

10. The flexible display panel of claim 1, wherein the metal layer comprises at least one material selected from the group consisting of Al, Ag, Mg, Cr, Ti, Ni, Au, Ta, Cu, Ca, Co, Fe, Mo, W, Pt, and Yb.

11. The flexible display panel of claim 1, wherein the dielectric layer comprises at least one material selected from the group consisting of SiO₂, TiO₂, ZrO₂, Ta₂O5, HfO₂, Al₂O₃, ZnO, Y₂O₃, BeO, MgO, PbO₂, WO₃, VOX, SiNx, AlNx, ZnS, CdS, SiC, SiCN, LiF, CaF₂, MgF₂, NaF, BaF₂, PbF₂, LaF₃, and GaP.

12. The flexible display panel of claim 1, wherein the dielectric layer comprises at least one material selected from the group consisting of an epoxy-based resin, an acryl-based resin, a perylene-based resin, and a polyimide resin.

13. The flexible display panel of claim 1, wherein the display region comprises:

at least one thin film transistor; and

an organic light emitting device electrically connected to the at least one thin film transistor, the organic light emitting device comprising;

a first electrode layer;

a second electrode layer facing the first electrode layer; and

an organic emission layer disposed between the first and second electrode layers.

14. A method of manufacturing a flexible display panel, the method comprising:

forming a thin film transistor comprising an active layer, a gate electrode, a source electrode, and a drain electrode, on a substrate;

forming an organic light emitting device comprising;

a first electrode;

a second electrode disposed adjacent to the first electrode; and

an organic emission layer disposed between the first and second electrodes and in an opening of a pixel defining layer; and

forming an anti-reflective layer on the organic light emitting device, the anti-reflective layer comprising;

a planarization layer;

a metal layer; and

a dielectric layer.

15. The method of claim 14, wherein the forming of the anti-reflection layer comprises:

forming the planarization layer on the organic light emitting device; and

forming a metal-dielectric layer by alternately stacking a plurality of the metal layers and a plurality of the dielectric layers on the planarization layer.

16. The method of claim 14, wherein the forming of the anti-reflection layer comprises forming a metal pattern layer directly above the pixel defining layer.

17. The method of claim 14, further comprising, after the forming of the anti-reflection layer, forming a metal pattern layer on the anti-reflection layer directly above the pixel defining layer.

18. The method of claim 14, further comprising, after the forming of the anti-reflection layer:

forming a touch screen panel; and

forming a window layer on the touch screen panel.

19. A flexible display panel comprising:

a flexible panel comprising an organic light emitting device disposed on a substrate; and

an anti-reflection layer disposed on the flexible panel and having a polarization characteristic,

wherein the anti-reflection layer comprises a plurality of metal layers alternately stacked with a plurality of dielectric layers.

20. The flexible display panel of claim 19, wherein the anti-reflection layer further comprises a planarization layer.