Organic El Display Device

• US 20090085471A1
• Filed: 03/01/2007
• Published: 04/02/2009
• Est. Priority Date: 03/07/2006
• Status: Abandoned Application

• Current Assignee: ROHM Co., Ltd.
• Original Assignee: ROHM Co., Ltd.
• Inventors: Tsujimura, Hiroki
• Application Number:
  US12/224,530
• Publication Number:
  US 20090085471A1
• Time in Patent Office: Days
• US Class Current: 313/504
• CPC Class Codes: H10K 50/856 comprising reflective means
• 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 59/878 comprising reflective means

Abstract

An organic EL display device (A1) includes a transparent substrate (1), an anode electrode (2) and a cathode electrode (3) laminated on the substrate (1), and a plurality of light emitting layers (5) arranged between the anode electrode (2) and the cathode electrode (3) and made of an organic layer. The light emitting layers (5) are separated from each other by spaces (51) in an in-plane direction of the substrate (1). The organic EL display device further includes a reflective surface (4a) covering at least part of a respective one of the spaces (51) and inclined to come closer to the substrate (1) as proceeding from one of the light emitting layers (5) toward adjacent one of the light emitting layers (5).

Claims

1. An organic EL display device comprising:

a transparent substrate;

an anode electrode and a cathode electrode laminated on the substrate; and

a plurality of light emitting layers disposed between the anode electrode and the cathode electrode and made of an organic material;

wherein the plurality of light emitting layers are separated from each other by spaces in an in-plane direction of the substrate,

wherein each of the spaces is covered at least partially by a reflective surface that is inclined to come closer to the substrate as proceeding from one of the light emitting layers toward an adjacent one of the light emitting layers.

2. The organic EL display device according to claim 1, wherein the reflective surface is made of metal.

3. The organic EL display device according to claim 1, further comprising color conversion layers accommodated in the spaces.

4. The organic EL display device according to claim 1, wherein each of the anode electrode and the cathode electrode is made of an opaque conductor.

5. The organic EL display device according to claim 4, wherein one of the anode electrode and the cathode electrode is closer to the substrate than the other is, the closer one being smaller in size than each of the spaces in the direction in which the light emitting layers are separated from each other.