Top-emitting OLED device with light-scattering layer and color-conversion

• US 7,791,271 B2
• Filed: 02/24/2006
• Issued: 09/07/2010
• Est. Priority Date: 02/24/2006
• Status: Active Grant

• Current Assignee: Global OLED Technology LLC (LG Display Co., Ltd.)
• Original Assignee: Global OLED Technology LLC (LG Display Co., Ltd.)
• Inventors: Cok, Ronald S., Arnold, Andrew D., Burberry, Mitchell S.
• Primary Examiner(s): Ton; Toan
• Assistant Examiner(s): Hanley; Britt D
• Application Number:
  US11/361,089
• Publication Number:
  US 20070200492A1
• Time in Patent Office: 1,656 Days
• Field of Search: None
• US Class Current: 313/506
• CPC Class Codes: H10K 2102/3026 Top emission
• 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 50/854 comprising scattering means
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• 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 59/877 comprising scattering means
• CPC Class Codes: H10K 59/8792 comprising light absorbing layers, e.g. black layers

Abstract

A top-emitting OLED device, comprising: one or more OLEDs formed on a substrate; a light-scattering layer formed over the one or more OLEDs; a transparent cover; one or more color filters formed on the transparent cover; a color-conversion material layer formed over the color filters, or formed over or integral with the light-scattering layer; wherein the substrate is aligned and affixed to the transparent cover so that the locations of the color filters and color conversion material correspond to the location of the OLEDs, and the color-conversion material layer, color filters, and the light-scattering layer are between the cover and substrate, and a low-index gap is formed between the light-scattering layer and the color filters, with no light-scattering layer being positioned between the color conversion material layer and the low-index gap.

Claims

1. A top-emitting OLED device, comprising:

one or more OLEDs formed on a substrate, the OLED including a first electrode formed over the substrate, one or more layers of light-emitting organic material formed over the first electrode, and a transparent second electrode formed over the one or more layers of light-emitting organic material;

a light-scattering layer formed over the one or more OLEDs for scattering light emitted by the one or more layers of light-emitting organic material;

a transparent cover having a first refractive index;

one or more color filters formed on the transparent cover;

a color-conversion material layer formed over the color filters, or formed over or integral with the light-scattering layer;

wherein the substrate is aligned and affixed to the transparent cover so that the locations of the color filters and color conversion material correspond to the location of the OLEDs, and the color-conversion material layer, color filters, and the light-scattering layer are between the cover and substrate, and a low-index gap having a second refractive index less than the first refractive index is formed between the light-scattering layer and the color filters, with no light-scattering layer being positioned between the color conversion material layer and the low-index gap and

black-matrix material disposed between the one or more color filters, wherein the black-matrix material is thicker than the color filters and is aligned with non-emissive areas between the OLEDs formed on the substrate and serves as a spacer forming the low-index gap.

2. The OLED device of claim 1 further comprising black-matrix material within at least one emissive areas of at least one OLED.