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US RE51,049 E1Granted
Organic light-emitting display device with spacer between sub-pixels
AssigneeLG Display Co., Ltd.
InventorsEun-Jung Park, Kwan-Soo Kim, Byung-Soo Kim, Han-Byeol Seok, Su-Hyeon Kim, Seok-Hyun Kim
Life of this patent
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Abstract
Disclosed is an organic light-emitting display device, which prevents lateral current leakage by providing a structure on a bank so as to cut off an organic material, which is formed in a subsequent process, around the structure.
Claims35
An organic light-emitting display device comprising:
- a substrate including a plurality of pixels, each pixel comprising a first sub-pixel, a second sub-pixel and a third sub-pixel, each of the first to third sub-pixels having an emission portion and a non-emission portion surrounding the emission portion;
- a first electrode on the emission portion of each of the first to third sub-pixels;
- a bank on the non-emission portion;
- a first spacer having a negatively tapered shape and provided on the bank at least between the first sub-pixel and the second sub-pixel;
- a second spacer placed between the second sub-pixel and the third sub-pixel, wherein the second spacer is higher than the first spacer;
- an organic stack above the first electrode and the first spacer, wherein the organic stack on the first electrode is spaced from sides of the first electrode;
- and
- a second electrode disposed on the organic stack,
- wherein a length of the first spacer in a first direction is shorter than a dimension of the first sub-pixel in the first direction, the second sub-pixel and the third sub-pixel separated from the first sub-pixel in a second direction crossing the first direction, and
- wherein the first spacer is placed to block the emission portion of the second sub-pixel from the emission portion of the first sub-pixel.
7 more elements
An organic light emitting device, comprising:
- a first sub-pixel in a pixel configured to emit light of a first color, the first sub-pixel comprising two first electrodes and a first portion of an organic stack sandwiched between the two first electrodes;
- a second sub-pixel adjacent to and spaced apart from the first sub-pixel in the pixel, the second sub-pixel configured to emit light of a second color, the second sub-pixel comprising two second electrodes and a second portion of the organic stack sandwiched between the two second electrodes;
- a third sub-pixel configured to emit light of a third color, the third sub-pixel comprising two third electrodes and a third portion of the organic stack sandwiched between the two third electrodes, wherein the second sub-pixel and the third sub-pixel are alternately disposed in a first direction, adjacent to the first sub-pixel;
- a first spacer between the first sub-pixel and the second sub-pixel, the first spacer placed to block the second portion of the organic stack of the second sub-pixel from the first portion of the organic stack of the first sub-pixel;
- and
- a second spacer placed between the second sub-pixel and the third sub-pixel, wherein the second spacer is higher than the first spacer,
- wherein a length of the first spacer in the first direction is shorter than a dimension of an emission portion of the first sub-pixel in the first direction, the second sub-pixel separated from the first sub-pixel in a second direction crossing the first direction.
4 more elements
A method of manufacturing an organic light-emitting display device, the method comprising:
- forming a plurality of pixels on a substrate, the plurality of pixels comprising a first sub-pixel, a second sub-pixel and a third sub-pixel, each of the first to third sub-pixels having an emission portion and a non-emission portion;
- forming a first electrode on the emission portion of each of the first to third sub-pixels;
- forming a bank on the non-emission portion;
- forming a first spacer between the emission portion of the first sub-pixel and the emission portion of the second sub-pixel to block the emission portion of the second sub-pixel from the emission portion of the first sub-pixel;
- forming a second spacer between the second sub-pixel and the third sub-pixel, wherein the second spacer is higher in height than the first spacer;
- forming an organic stack above the first electrode and the first spacer, wherein the organic stack has at least two stacks, and a charge generation layer between the stacks;
- and
- forming a second electrode on the organic stack,
- wherein a length of the first spacer is smaller than a length of the emission portion of the first sub-pixel.
6 more elements
Dependencies are inferred from the claim text.