ORGANIC EL ELEMENT, ORGANIC EL DISPLAY PANEL USING SAME, AND ORGANIC EL DISPLAY PANEL MANUFACTURING METHOD

• US 20180286935A1
• Filed: 06/06/2018
• Published: 10/04/2018
• Est. Priority Date: 09/07/2015
• Status: Active Grant

• Current Assignee: JDI Design and Development GK
• Original Assignee: Japan Display Incorporated, JOLED Inc.
• Inventors: KONDO, Tetsuro
• Granted Patent: US 10,707,283 B2
• Time in Patent Office: Days
• CPC Class Codes: H01L 27/1218 with a particular composition or structure of the substrate
• CPC Class Codes: H10K 50/856 comprising reflective means
• CPC Class Codes: H10K 59/00 Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/123 Connection of the pixel electrodes to the thin film transistors [TFT]
• CPC Class Codes: H10K 59/124 Insulating layers formed between TFT elements and OLED elements
• CPC Class Codes: H10K 59/125 including organic TFTs [OTFT]
• CPC Class Codes: H10K 59/126 Shielding, e.g. light-blocking means over the TFTs
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/8792 comprising light absorbing layers, e.g. black layers
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/16 using physical vapour deposition [PVD], e.g. vacuum deposition or sputtering

Abstract

An organic EL display panel in which pixels are arranged in a matrix, including: light-emitting layers disposed above pixel electrode layers in intervals between adjacent ones of column banks; an opposing electrode layer disposed above the light-emitting layers, the opposing electrode layer including a light-transmissive material; column light-shielding layers disposed higher than the pixel electrode layers, extending in the column direction, arranged side-by-side in the row direction, and overlapping row-direction edge portions of the pixel electrode layers in plan view of a substrate; and row light-shielding layers disposed higher than the pixel electrode layers, extending in the row direction, arranged side-by-side in the column direction, overlapping column-direction edge portions of the pixel electrode layers and partially overlapping contact regions in plan view of the substrate.

Claims

1. An organic EL element, comprising:

a substrate;

a thin film transistor disposed in the substrate;

a pixel electrode layer disposed on the substrate, the pixel electrode layer including a light-reflective material;

banks disposed on the substrate and on the pixel electrode layer, covering edge portions of the pixel electrode layer and a portion of a contact region of the pixel electrode layer, the contact region being for electrically connecting the pixel electrode layer;

a light-emitting layer disposed above the pixel electrode layer;

an opposing electrode layer disposed above the light-emitting layer, the opposing electrode layer including a light-transmissive material; and

a light-shielding layer disposed higher than the pixel electrode layer, the light-shielding layer overlapping the edge portions of the pixel electrode layers, wherein

a source or a drain of the thin-film transistor is connected to the pixel electrode layer via a connecting recess in which a portion of the pixel electrode layer is recessed in a direction of the substrate, and

in the plan view of the substrate, the light-shielding layer does not overlap with the connecting recess.

2. The organic EL display panel of claim 1, further comprising:

a plurality of pixels arranged in a row direction and a column direction in a matrix;

a plurality of thin-film transistors arranged in the row direction and the column direction in a matrix in the substrate, in positions corresponding to the pixels, wherein

sources or drains of the thin-film transistors are connected to pixel electrode layers via connecting recesses in which portions of the pixel electrode layers in contact regions are recessed in a direction of the substrate, and

in a plan view of the substrate, row light-shielding layers do not overlap with the connecting recesses.

3. The organic EL display panel of claim 1, wherein

the light-emitting layer extends continuously in a column direction above the banks.

4. The organic EL display panel of claim 1, wherein

the light-emitting layer is interrupted by the banks.

5. The organic EL display panel of claim 4, wherein

the light-emitting layer interrupted by the banks emits a same color of light along a length in a column direction.

6. The organic EL display panel of claim 1, wherein

the light-emitting layer emits light of a different color than adjacent light-emitting layers disposed in adjacent intervals between the banks.

7. The organic EL display panel of claim 1, further comprising:

an upper substrate disposed above the opposing electrode, the upper substrate including a light-transmissive material, wherein

the light-shielding layer is disposed in direct contact with the upper substrate.

8. The organic EL display panel of claim 1, further comprising:

column banks disposed on the substrate and on the pixel electrode layer,

wherein the light-shielding layer is disposed on an upper surface of the column banks.

9. The organic EL display panel of claim 1, wherein

the light-shielding layer is disposed on an upper surface of the banks.