Organic light emitting display device having at least two pixel areas with a planarization film therebetween, head mounted display including the same, and method for manufacturing the same

• US 10,490,768 B2
• Filed: 10/30/2017
• Issued: 11/26/2019
• Est. Priority Date: 10/31/2016
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Baik, Seung Min, Kim, Jong Sung, Kim, Ho-Jin
• Primary Examiner(s): Henry, Caleb E
• Application Number:
  US15/797,572
• Publication Number:
  US 20180123081A1
• Time in Patent Office: 757 Days
• Field of Search: 257 40
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: H10K 50/813 characterised by their shape
• CPC Class Codes: H10K 50/816 Multilayers, e.g. transparent multilayers
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 50/858 comprising refractive means, e.g. lenses
• CPC Class Codes: H10K 59/1201 Manufacture or treatment
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/124 Insulating layers formed between TFT elements and OLED elements
• CPC Class Codes: H10K 59/32 Stacked devices having two or more layers, each emitting at different wavelengths
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 59/80515 characterised by their shape
• CPC Class Codes: H10K 59/80517 Multilayers, e.g. transparent multilayers
• CPC Class Codes: H10K 59/80518 Reflective anodes, e.g. ITO combined with thick metallic layers
• CPC Class Codes: H10K 59/873 Encapsulations
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass

Abstract

Disclosed is an organic light emitting display device which is capable of preventing an anode electrode from being structurally disconnected with a cathode electrode or a charge generation layer of an organic light emitting layer, and a head mounted display including the same, and a method for manufacturing the same, wherein the organic light emitting display device may include an insulating film, a first electrode and another first electrode on the insulating film, a planarization film filling a space between the first electrode and the another first electrode, an organic light emitting layer on the first electrode and the another first electrode and the planarization film, and a second electrode on the organic light emitting layer.

Claims

1. An organic light emitting display (OLED) device comprising:

an insulating film;

a first pixel area and a second pixel area on the insulating film, the first pixel area and the second pixel area each including a first electrode;

a film filling a space laterally between the first electrode of the first pixel area and the first electrode of the second pixel area;

a trench in the film between the first electrode of the first pixel area and the first electrode of the second pixel area, wherein the trench extends at least partially into the insulating film;

an organic light emitting layer on the first electrodes of the first pixel area and the second pixel area and the film; and

a second electrode on the organic light emitting layer.

2. The organic light emitting display (OLED) device according to claim 1, wherein a height in an edge of the film is substantially equal to or lower than a height of at least one of the first electrodes.

3. The organic light emitting display (OLED) device according to claim 1, wherein a height in an edge of the film is higher than a height of at least one of the first electrodes.

4. The organic light emitting display (OLED) device according to claim 1, wherein each of the first electrodes includes a reflective electrode and a transparent electrode on the reflective electrode.

5. The organic light emitting display (OLED) device according to claim 4, wherein the transparent electrode and the reflective electrode are each formed in one of a vertical structure, a reverse-tapered structure or a forward-tapered structure.

6. The organic light emitting display (OLED) device according to claim 4, wherein a height in an edge of the film is lower than a height of the transparent electrode and higher than a height of the reflective electrode.

7. The organic light emitting display (OLED) device according to claim 5, wherein the transparent electrode and the reflective electrode are each formed in a reverse-tapered structure.

8. The organic light emitting display (OLED) device according to claim 5, wherein the transparent electrode and the reflective electrode are each formed in a forward-tapered structure.

9. The organic light emitting display (OLED) device according to claim 5, wherein the reflective electrode is formed in a reverse-tapered structure, and the transparent electrode is formed in one of a vertical structure or a forward-tapered structure.

10. The organic light emitting display (OLED) device according to claim 1, wherein the organic light emitting layer is disposed on the trench, a thickness of the organic light emitting layer at a sidewall of the trench being smaller than a thickness of the organic light emitting layer at a bottom of the trench.

11. The organic light emitting display (OLED) device according to claim 4, wherein each of the first electrodes further includes a buffer electrode below the reflective electrode.

12. The organic light emitting display (OLED) device according to claim 3, wherein the transparent electrode and the reflective electrode are both formed in a vertical structure.

13. A head mounted display, comprising:

an organic light emitting display (OLED) device, the OLED device including;

an insulating film,

a first pixel area and a second pixel area on the insulating film, the first pixel area and the second pixel area each including a first electrode,

a film filling a space between the first electrode of the first pixel area and the first electrode of the second pixel area,

an organic light emitting layer on the first electrodes of the first pixel area and the second pixel area and the film, and

a second electrode on the organic light emitting layer;

a display receiving case receiving the OLED device therein; and

a lens disposed at one side of the display receiving case, and configured to be provided with an image of the OLED device.

14. The head mounted display according to claim 13, further comprising a hole in the film and between the first electrode of the first pixel area and the first electrode of the second pixel area.

15. The head mounted display according to claim 13, wherein a height in an edge of the film is substantially equal to or lower than a height of at least one of the first electrodes.