ORGANIC EL DISPLAY

• US 20120228603A1
• Filed: 11/17/2009
• Published: 09/13/2012
• Est. Priority Date: 11/17/2009
• Status: Abandoned Application

• Current Assignee: Unified Innovative Technology, LLC (LG Display Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Nakamura, Hideyo
• Application Number:
  US13/510,485
• Publication Number:
  US 20120228603A1
• Time in Patent Office: Days
• US Class Current: 257/40
• CPC Class Codes: H10K 2102/3026 Top emission
• CPC Class Codes: H10K 50/805 Electrodes
• CPC Class Codes: H10K 50/818 Reflective anodes, e.g. ITO combined with thick metallic layers
• CPC Class Codes: H10K 50/822 characterised by their shape
• CPC Class Codes: H10K 50/824 combined with auxiliary electrodes
• CPC Class Codes: H10K 50/828 Transparent cathodes, e.g. comprising thin metal layers
• CPC Class Codes: H10K 50/8428 Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 59/80521 characterised by their shape
• CPC Class Codes: H10K 59/80522 combined with auxiliary electrodes
• CPC Class Codes: H10K 59/80524 Transparent cathodes, e.g. comprising thin metal layers
• CPC Class Codes: H10K 59/8723 Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
• CPC Class Codes: H10K 59/873 Encapsulations
• CPC Class Codes: H10K 71/135 using ink-jet printing

Abstract

An object of the present invention is to provide an organic EL display that has a reduced optical loss and high efficiency, and can be manufactured by an inexpensive method. The organic EL display of the present invention is formed by bonding an organic EL element substrate including a substrate, reflective electrode, organic EL layer, separation wall, barrier layer, transparent electrode, and color conversion layer; and a sealing substrate together, wherein: the reflective electrode includes a plurality of partial electrodes; the organic EL layer is formed on the reflective electrode and includes a plurality of parts separated by the separation wall; the transparent electrode is formed on the organic EL layer; the barrier layer covers the separation wall and the transparent electrode, and has a recessed part in a location corresponding to the reflective electrode; and the color conversion layer is formed in the recessed part.

Claims

1. An organic EL display formed by bonding:

an organic EL element substrate comprising a substrate,

a reflective electrode, an organic EL layer, a separation wall, a barrier layer, a transparent electrode, and a color conversion layer; and

a sealing substrate to each other, wherein;

the reflective electrode is constituted of a plurality of partial electrodes;

the organic EL layer is formed on the reflective electrode and is constituted of a plurality of parts that are separated by the separation wall;

the transparent electrode is formed on the organic EL layer;

the barrier layer covers the separation wall and the transparent electrode, and has a recessed part in a location corresponding to the reflective electrode; and

the color conversion layer is formed in the recessed part.

2. The organic EL display according to claim 1, wherein a refractive index of the color conversion layer is equal to or more than a refractive index of the barrier layer.

3. The organic EL display according to claim 1, wherein the sealing substrate further comprises a color filter.

4. The organic EL display according to claim 1, wherein:

the separation wall has a plurality of openings respectively corresponding to the partial electrodes that constitute the reflective electrode; and

the organic EL layer is formed in the plurality of openings.

5. The organic EL display according to claim 4, further comprising auxiliary wiring for the transparent electrode, wherein the auxiliary wiring is connected to the transparent electrode in an area where the organic EL layer is not formed by the separation wall.

6. The organic EL display according to claim 4, wherein:

the separation wall is formed of a metallic material; and

the transparent electrode is electrically connected to the separation wall.

7. The organic EL display according to claim 1, wherein:

the separation wall is constituted of a plurality of striped parts that are arranged in gaps between the plurality of partial electrodes constituting the reflective electrode and extend in one direction; and

the organic EL layer is formed in a gap of the separation wall.

8. The organic EL display according to claim 7, wherein the transparent electrode is constituted of a plurality of striped parts that are separated by the separation wall.

9. The organic EL display according to claim 8, wherein applied voltage is individually controlled for each of the plurality of striped parts of the transparent electrode.

10. The organic EL display according to claim 8, wherein an electrical characteristic can be measured for each of the plurality of striped parts of the transparent electrode.