ORGANIC LIGHT-EMITTING DISPLAY APPARATUS WITH ENHANCED LIGHT OUTPUT EFFICIENCY AND MANUFACTURING METHOD THEREOF

• US 20150162390A1
• Filed: 03/26/2014
• Published: 06/11/2015
• Est. Priority Date: 12/10/2013
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Wang, Seong-Min, Nam, Jung-Gun, Lee, Dae-Young
• Granted Patent: US 9,406,735 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H10K 2102/3026 Top emission
• CPC Class Codes: H10K 50/856 comprising reflective means
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 50/868 Arrangements for polarized light emission H10K50/86 takes precedence
• CPC Class Codes: H10K 59/121 characterised by the geometry or disposition of pixel elements
• CPC Class Codes: H10K 59/352 the areas of the RGB subpixels being different
• CPC Class Codes: H10K 59/353 characterised by the geometrical arrangement of the RGB subpixels
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass

Abstract

An organic light-emitting display apparatus includes: a first substrate; a display unit on the first substrate, the display unit being divided into a pixel unit and a non-pixel unit located around the pixel unit; a first electrode having an island shape to correspond to the pixel unit; a second electrode facing the first electrode and over the pixel unit and the non-pixel unit; an organic light-emitting layer between the first electrode and the second electrode and to emit light toward the second electrode; a second substrate facing the second electrode and bonded with the first substrate; and a light output unit arranged as a part corresponding to the pixel unit and a light reflection unit arranged as a part corresponding to the non-pixel unit, wherein the light output unit and the light reflection unit are on an internal surface of the second substrate facing the second electrode.

Claims

1. An organic light-emitting display apparatus, comprising:

a first substrate;

a display unit on the first substrate, wherein the display unit is divided into a pixel unit to emit light externally and a non-pixel unit located around the pixel unit and to not emitting light;

a first electrode having an island shape to correspond to the pixel unit;

a second electrode facing the first electrode and arranged over the pixel unit and the non-pixel unit;

an organic light-emitting layer arranged between the first electrode and the second electrode and to emit light toward the second electrode;

a second substrate arranged to face the second electrode and bonded with the first substrate; and

a light output unit arranged as a part corresponding to the pixel unit and a light reflection unit arranged as a part corresponding to the non-pixel unit, wherein the light output unit and the light reflection unit are on an internal surface of the second substrate facing the second electrode.

2. The organic light-emitting display apparatus of claim 1, wherein the light reflection unit comprises a plurality of layers sequentially from the internal surface of the second substrate toward the second electrode, and the layers comprise:

a first external light anti-reflective layer arranged on the internal surface of the second substrate and to prevent external light from becoming reflected from an external surface of the second substrate; and

a first light reflection layer arranged on the surface of the first external light anti-reflective layer and to reflect the light emitted toward the second substrate back to the second electrode.

3. The organic light-emitting display apparatus of claim 2, wherein the light output unit comprises a second external light anti-reflective layer laterally integrated with the first external light anti-reflective layer and a second light reflection layer laterally integrated with the first light reflection layer, the second external light anti-reflective layer and the second light reflection layer being formed sequentially from the internal surface of the second substrate toward the second electrode, and

a plurality of slit patterns that enables the light emitted from the organic light-emitting layer to be externally emitted are formed into the second external light anti-reflective layer and the second light reflection layer.

4. The organic light-emitting display apparatus of claim 3, further comprising a protective layer arranged on a surface of the second light reflection layer, being transparent and comprises the slit patterns.

5. The organic light-emitting display apparatus of claim 2, wherein the first external light anti-reflective layer comprises at least one of a black matrix, a metal nitride, and a metal oxide.

6. The organic light-emitting display apparatus of claim 2, wherein the first light reflection layer comprises aluminum.

7. The organic light-emitting display apparatus of claim 2, wherein a surface of the first light reflection layer is planar.

8. The organic light-emitting display apparatus of claim 2, further comprising a diffused reflection layer on a surface of the first light reflection layer, wherein the diffused reflection layer is configured to diffuse a reflection of the light emitted from the organic light-emitting layer.

9. The organic light-emitting display apparatus of claim 1, further comprising a thin film transistor (TFT) arranged on the first substrate, electrically coupled to the first electrode, and overlapped with the first electrode to cover the first electrode.

10. The organic light-emitting display apparatus of claim 1, wherein a surface of the second electrode is spaced from a surface of the light output unit and the light reflection unit.

11. A method of manufacturing an organic light-emitting display apparatus, the method comprising:

providing a first substrate on which a display unit is located, wherein the display unit is divided into a pixel unit to emit light externally and a non-pixel unit located around the pixel unit and to not emit light;

forming a first electrode having an island shape to correspond to the pixel unit;

forming a second electrode facing the first electrode and arranged over the pixel unit and the non-pixel unit;

forming an organic light-emitting layer arranged between the first electrode and the second electrode and to emitting light toward the second electrode;

forming a light reflection unit as a part corresponding to the non-pixel unit and a light output unit as a part corresponding to the pixel unit; and

arranging a second substrate to allow an internal surface of the second substrate to face the second electrode and bonding the second substrate with the first substrate, wherein the light output unit and the light reflection unit are on the internal surface of the second substrate.

12. The method of claim 11, wherein the forming of the light reflection unit and the light output unit comprises:

forming a first external light anti-reflective layer as a part corresponding to the light reflection unit and on the internal surface of the second substrate and forming a second external light anti-reflective layer laterally and integrally with the first external light anti-reflective layer as a part corresponding to the light output unit;

forming a first light reflection layer on a surface of the first external light anti-reflective layer and forming a second light reflection layer laterally and integrally with the first light reflection layer as a part corresponding to the light output unit;

forming a protective layer at least on a surface of second light reflection layer; and

forming a plurality of slit patterns into the second external light anti-reflective layer, the second light reflection layer, and the protective layer.

13. The method of claim 12, wherein the first external light anti-reflective layer and the second external light anti-reflective layer comprises at least one of a black matrix, a metal nitride, and a metal oxide.

14. The method of claim 12, wherein each of the first light reflection layer and the second light reflection layer comprises aluminum.

15. The method of claim 12, further comprising forming a diffused reflection layer on a surface of the first light reflection, wherein the diffused reflection layer is configured to diffuse a reflection of light emitted from the organic light-emitting layer.

16. The method of claim 11, further comprising forming a thin film transistor (TFT) arranged on the first substrate, electrically coupled to the first electrode, and overlapped with the first electrode to cover the first electrode.