US-12628541-B2 - Display device

US12628541B2US 12628541 B2US12628541 B2US 12628541B2US-12628541-B2

Abstract

A display device includes: a display panel having first and second emission regions, each of the first and second emission regions configured to emit a first source light having a first color and a second source light having a second color; a first partition wall on the display panel and corresponding to the first emission region; a sub-partition wall dividing a region inside the first partition wall into a main region and a sub region in a plane view; a first light conversion pattern inside the main region, the first light conversion pattern configured to convert the first source light into a light having the second color; and a first color filter on the first partition wall and the sub-partition wall, the first color filter being transparent to the second source light that passes through the sub region and to the converted light having the second color.

Inventors

Jang-Il KIM
Jeongki Kim
HYEJUN WOO
Seongyeon LEE
Sujin Lee

Assignees

SAMSUNG DISPLAY CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20230824
Priority Date: 20220921

Claims (20)

1 . A display device comprising: a display panel having a first emission region and a second emission region, each of the first emission region and the second emission region configured to emit a first source light having a first color and a second source light having a second color; a first partition wall on the display panel, the first partition wall corresponding to the first emission region; a sub-partition wall dividing a region inside the first partition wall into a main region and a sub region in a plane view; a first light conversion pattern inside the main region, the first light conversion pattern configured to convert the first source light into a light having the second color; and a first color filter on the first partition wall and the sub-partition wall, the first color filter being transparent to the second source light that passes through the sub region and to the converted light having the second color.
2 . The display device of claim 1 , wherein the sub region includes a corner area of the region inside the first partition wall.
3 . The display device of claim 1 , wherein the sub region completely surrounds the main region in the plane view.
4 . The display device of claim 1 , wherein an area of the main region is greater than an area of the sub region.
5 . The display device of claim 1 , wherein the first light conversion pattern comprises a base resin and a quantum dot mixed in the base resin.
6 . The display device of claim 1 , further comprising a transparent organic material inside the sub region.
7 . The display device of claim 6 , further comprising a scattering particle inside the sub region and mixed in the transparent organic material.
8 . The display device of claim 1 , wherein the first color is blue light, and wherein the second color is green light.
9 . The display device of claim 1 , wherein the first color filter overlaps the main region and the sub region in the plane view.
10 . The display device of claim 1 , further comprising: a second partition wall on the display panel, the second partition wall corresponding to the second emission region; a second light conversion pattern inside the second partition wall, the second light conversion pattern configured to convert the first source light into a light having a third color; and a second color filter on the second partition wall, the second color filter being opaque to the second source light that passes through the second light conversion pattern and transparent to the converted light having the third color.
11 . The display device of claim 1 , further comprising: a second partition wall on the display panel, the second partition wall corresponding to the second emission region; a transparent resin pattern inside the second partition wall, the transparent resin pattern being transparent to the first source light and the second source light; and a second color filter on the second partition wall, the second color filter being opaque to the second source light that passes through the transparent resin pattern and transparent to the first source light that passes through the transparent resin pattern.
12 . The display device of claim 11 , wherein the transparent resin pattern comprises a base resin and a scattering particle mixed in the base resin.
13 . The display device of claim 1 , further comprising a base layer facing the display panel in a thickness direction of the display panel, wherein the first color filter is on a bottom surface of the base layer, and wherein the first partition wall and the sub-partition wall are on a bottom surface of the first color filter.
14 . The display device of claim 1 , wherein the display panel comprises: a first anode in the first emission region; a second anode in the second emission region and spaced apart from the first anode; an emission structure on the first anode and the second anode, the emission structure extending through the first emission region and the second emission region; and a cathode on the emission structure, the cathode extending through the first emission region and the second emission region.
15 . The display device of claim 14 , wherein the emission structure comprises: a first emission layer configured to generate the first source light; a second emission layer configured to generate the second source light; and a charge generation layer between the first emission layer and the second emission layer.
16 . The display device of claim 1 , further comprising: a main dummy partition wall defining a main well that does not overlap the first emission region and the second emission region in the plane view; and a sub-dummy partition wall extending between the main dummy partition wall and the first partition wall and defining a subordinate well.
17 . A display device comprising: a display panel comprising a first light emitting element and a second light emitting element, each of the first light emitting element and the second light emitting element configured to emit a first source light having a first color and a second source light having a second color; and a light conversion panel spaced apart from the display panel in a thickness direction of the display panel, the light conversion panel comprising: a base layer; a partition wall on a bottom surface of the base layer, the partition wall corresponding to the first light emitting element; a sub-partition wall dividing a region inside the partition wall into a main region and a sub region in a plane view; a light conversion pattern inside the main region, the light conversion pattern configured to convert the first source light into a light having the second color; and a color filter between the light conversion pattern and the bottom surface of the base layer, the color filter being transparent to the second source light that passes through the sub region and to the converted light having the second color.
18 . The display device of claim 17 , further comprising a synthetic resin material between the display panel and the light conversion panel, wherein the synthetic resin material is inside the sub region.
19 . A display device comprising: a first light emitting element and a second light emitting element, each of the first light emitting element and the second light emitting element configured to emit a first source light having a first color and a second source light having a second color; a thin encapsulation layer encapsulating the first light emitting element and the second light emitting element; a partition wall on the thin encapsulation layer, the partition wall corresponding to the first light emitting element; a sub-partition wall dividing a region inside the partition wall into a main region and sub region in a plane view; a light conversion pattern inside the main region, the light conversion pattern configured to convert the first source light into a light having the second color; and a color filter on the partition wall and the sub-partition wall, the color filter being transparent to the second source light that passes through the sub region and to the converted light having the second color.
20 . The display device of claim 19 , further comprising: a transparent organic material inside the sub region; and a scattering particle mixed in the transparent organic material.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims priority to and the benefit of Korean Patent Application No. 10-2022-0119577, filed on Sep. 21, 2022, in the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference. BACKGROUND 1. Field Aspects of embodiments of the present disclosure relate to a display device. 2. Description of the Related Art A display device may be classified as a transmissive display device that selectively allows source light to pass therethrough or an emissive display device that generates source light itself. A display device may include different types of functional patterns depending on pixels to create images. A functional pattern may transmit a partial wavelength range of source light or may change a color of source light. SUMMARY An embodiment of the present disclosure provides a display device with increased light emission efficiency. According to an embodiment of the present disclosure, a display device includes: a display panel having a first emission region and a second emission region, each of the first emission region and the second emission region configured to emit a first source light having a first color and a second source light having a second color; a first partition wall on the display panel, the first partition wall corresponding to the first emission region; a sub-partition wall dividing a region inside the first partition wall into a main region and a sub region in a plane view; a first light conversion pattern inside the main region, the first light conversion pattern configured to convert the first source light into a light having the second color; and a first color filter on the first partition wall and the sub-partition wall, the first color filter being transparent to the second source light that passes through the sub region and to the converted light having the second color. The sub region may include a corner area of the region inside the first partition wall. The sub region may completely surround the main region in the plane view. An area of the main region may be greater than an area of the sub region. The first light conversion pattern may include a base resin and a quantum dot mixed in the base resin. The display device may further include a transparent organic material inside the sub region. The display device may further include a scattering particle inside the sub region and mixed in the transparent organic material. The first color may be blue light, and the second color may be green light. The first color filter may overlap the main region and the sub region in the plane view. The display device may further include: a second partition wall on the display panel, the second partition wall corresponding to the second emission region; a second light conversion pattern inside the second partition wall, the second light conversion pattern configured to convert the first source light into a light having a third color; and a second color filter on the second partition wall, the second color filter being opaque to the second source light that passes through the second light conversion pattern and transparent to the converted light having the third color. The display device may further include: a second partition wall on the display panel, the second partition wall corresponding to the second emission region; a transparent resin pattern inside the second partition wall, the transparent resin pattern being transparent to the first source light and the second source light; and a second color filter on the second partition wall, the second color filter being opaque to the second source light that passes through the transparent resin pattern and transparent to the first source light that passes through the transparent resin pattern. The transparent resin pattern may include a base resin and a scattering particle mixed in the base resin. The display device may further include a base layer facing the display panel in a thickness direction of the display panel. The first color filter may be on a bottom surface of the base layer, and the first partition wall and the sub-partition wall may be on a bottom surface of the first color filter. The display panel may include: a first anode in the first emission region; a second anode in the second emission region and spaced apart from the first anode; an emission structure on the first anode and the second anode, the emission structure extending through the first emission region and the second emission region; and a cathode on the emission structure, the cathode extending through the first emission region and the second emission region. The emission structure may include: a first emission layer configured to generate the first source light; a second emission layer configured to generate the second source light; and a charge generation layer between the first emission layer and the second emission layer. The display device may further include: a main dummy part