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US 12,713,801 B2Granted
Display device and method for manufacturing the same
AssigneeLG Display Co., Ltd.
InventorSong-Yi Jeong
Life of this patent
Estimating the term…
Abstract
A display device achieves a high resolution and a low power consumption through provision of subpixels each including a single light emitting layer and subpixels each including a plurality of overlapping light emitting layers. In the display device, it is also unnecessary to increase the number of expensive fine metal masks even for rendering of various grayscales. In addition, in the display device, different light emitting layers overlap with each other, and a charge generation layer is disposed between the overlapping light emitting layers, and, as such, emission of a secondary color can be achieved without necessity of a material for an additional light emitting layer of the secondary color.
Claims18
A display device comprising:
- reference subpixels and a mixed subpixel on a substrate, the reference subpixels including at least first and second subpixels, and the mixed subpixel provided at least between the first and second subpixels;
- a first electrode disposed on each of the first subpixel, the second subpixel and the mixed subpixel;
- a common hole transport layer disposed on the first electrode of each of the first subpixel, the second subpixel and the mixed subpixel;
- at least one functional layer disposed on the common hole transport layer of each of the first subpixel, the second subpixel and the mixed subpixel;
- a second electrode disposed on the reference subpixels and the mixed subpixel;
- a first charge generation layer disposed on the mixed subpixel;
- a first light emitting layer emitting a first color and disposed between the at least one functional layer and the second electrode of the first subpixel and the mixed subpixel;
- a second light emitting layer emitting a second color different from the first color and disposed between the at least one functional layer and the second electrode of the second subpixel and the mixed subpixel;
- and
- a bank between the reference subpixels and between the reference subpixels and the mixed subpixel,
- wherein the first charge generation layer is between the first light emitting layer and the second light emitting layer on the at least one functional layer,
- wherein the mixed subpixel emits a third color different from the first color and the second color,
- wherein a thickness and a number of the at least one functional layer in the second subpixel is different from a thickness and a number of the at least one functional layer in the first subpixel,
- wherein a thickness and a number of the at least one functional layer in the mixed subpixel is the same as the thickness and the number of the at least one functional layer in the first subpixel or the second subpixel, and
- wherein the bank includes a light shieldable material.
12 more elements
A display device comprising:
- reference subpixels and a mixed subpixel on a substrate, the reference subpixels including a first subpixel, a second subpixel and a third subpixel, and the mixed subpixel disposed adjacent to the first subpixel, the second subpixel and the third subpixel;
- a first electrode disposed on each of the first subpixel, the second subpixel, the third subpixel and the mixed subpixel;
- a common hole transport layer disposed on the first electrode of each of the first subpixel, the second subpixel and the mixed subpixel;
- at least one functional layer disposed on the common hole transport layer of each of the first subpixel, the second subpixel and the mixed subpixel;
- a second electrode disposed on the reference subpixels and the mixed subpixel;
- a first charge generation layer disposed on the mixed subpixel;
- a first light emitting layer emitting a first color and disposed between the at least one functional layer and the second electrode of the first subpixel and the mixed subpixel;
- a second light emitting layer emitting a second color different from the first color and disposed between the at least one functional layer and the second electrode of the second subpixel and the mixed subpixel;
- a third light emitting layer emitting a third color different from the first color and the second color, and disposed between the at least one functional layer and the second electrode of the third subpixel and the mixed subpixel;
- and
- a bank between the reference subpixels and between the reference subpixels and the mixed subpixel,
- wherein the first charge generation layer is disposed between the first light emitting layer and at least one of the second light emitting layer and the third light emitting layer on the at least one functional layer,
- wherein the mixed subpixel emits a fourth color different from the first color, the second color and the third color,
- wherein a thickness and a number of the at least one functional layer in the second subpixel is different from a thickness and a number of the at least one functional layer in the first subpixel,
- wherein a thickness and a number of the at least one functional layer in the third subpixel is different from the thickness and the number of the at least one functional layer in the first subpixel and the second subpixel,
- wherein a thickness and a number of the at least one functional layer in the mixed subpixel is the same as the thickness and the number of the at least one functional layer in one of the first subpixel, the second subpixel and the third subpixel, and
- wherein the bank includes a light shieldable material.
14 more elements
Dependencies are inferred from the claim text.