# US 12,193,279 B2 · Display device including color absorbing layer between capping and bank layers for improving color matching, and method of providing the same

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- Number: US 12,193,279 B2
- Document ID: US12193279B2
- Status: Granted
- Kind: B2
- Application number: 18/520,805
- Filed: 2023-11-28
- Published: 2024-03-21
- Granted: 2025-01-07
- Earliest claimed: 2020-06-22
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., LTD.
- Inventors: Jeong Ki Kim; Won Ji Gu; Jong Hoon Kim; Jea Heon Ahn; Ji Seong Yang; Hwa Yeul Oh
- Web page: https://patentgrep.com/patent/US12193279B2

## CPC

- H10K 59/38: comprising colour filters or colour changing media [CCM]
- H10K 59/122: Pixel-defining structures or layers, e.g. banks
- H10K 59/353: {characterised by the geometrical arrangement of the RGB subpixels}
- H10K 59/8792: {comprising light absorbing layers, e.g. black layers}
- H10K 59/32: Stacked devices having two or more layers, each emitting at different wavelengths
- H10K 59/877: {comprising scattering means}
- H10K 59/878: {comprising reflective means}
- H10K 2102/3026: {Top emission}
- H10K 2102/331: {Nanoparticles used in non-emissive layers, e.g. in packaging layer}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A display device includes a first display substrate including a light emitting element which emits light of a first color or light of a second color different from the first color, a second display substrate including in order toward the first display substrate, a layer including both a bank layer defining an opening and a wavelength control pattern in the opening, a capping layer covering the wavelength control pattern and the bank layer, and a color absorbing layer which corresponds to the bank layer and blocks the light of the first color and the light of the second color. The capping layer includes a first area corresponding to the color absorbing layer, the bank layer includes a second area corresponding to the color absorbing layer, and the first area of the capping layer is between the color absorbing layer and the second area of the bank layer.

## Claims

### Claim 1

A method of providing a display device, comprising:
providing a bank layer defining an opening on a substrate;
providing a color control layer in the opening;
providing a capping layer covering the bank layer and the color control layer;
after providing the capping layer, providing a color absorbing material layer on the capping layer;
patterning the color absorbing material layer on the capping layer, to provide a color absorbing pattern corresponding to the bank layer; and
providing a light emitting element substrate closer to the color absorbing pattern than each of the bank layer and the color control layer,
wherein
the capping layer includes a first area corresponding to the color absorbing pattern,
the bank layer includes a second area corresponding to the color absorbing pattern, and
the first area of the capping layer is between the color absorbing pattern and the second area of the bank layer.

### Claim 2 (depends on 1)

The method of claim 1, wherein the providing of the color absorbing pattern comprises exposing and developing the color absorbing material layer by using a photomask.

### Claim 3 (depends on 1)

The method of claim 1, wherein the color absorbing material layer includes a red pigment or a red dye, blocks blue light and green light, and transmits red light.