US-12628702-B2 - Display device

US12628702B2US 12628702 B2US12628702 B2US 12628702B2US-12628702-B2

Abstract

A display device includes a circuit substrate, first to third light-emitting diodes, a bank structure, a color conversion material layer, a first color filter component and a second color filter component. The first to third light-emitting diodes are located above the circuit substrate, wherein the first and third light-emitting diodes are light-emitting diodes of the same color, and the first and second light-emitting diodes are light-emitting diodes of different colors. The bank structure is located above the circuit substrate and has a first opening and a second opening. The first opening is overlapping with the first light-emitting diode, and the second opening is overlapping with the second and third light-emitting diodes. The color conversion material layer is filled into the first opening. The first color filter component is overlapping with the color conversion material layer. The second color filter component is overlapping with the second opening.

Inventors

Yu-Syuan Lin
Chun-Liang Lin
Peng-Yu Chen

Assignees

AUO Corporation

Dates

Publication Date: 20260512
Application Date: 20231204
Priority Date: 20230503

Claims (10)

1 . A display device, comprising: a circuit board; a first light-emitting diode, a second light-emitting diode and a third light-emitting diode, located above the circuit board, wherein the first light-emitting diode and the third light-emitting diode are light-emitting diodes of a same color, and the first light-emitting diode and the second light-emitting diode are light-emitting diodes of different colors; a bank structure, located above the circuit board and having a first opening and a second opening, wherein the first opening is overlapping with the first light-emitting diode, and the second opening is overlapping with the second light-emitting diode and the third light-emitting diode, wherein the first light-emitting diode, the second light-emitting diode and the third light-emitting diode are respectively configured to cause the display device to generate a first light-emitting region, a second light-emitting region and a third light-emitting region, wherein the second light-emitting region is overlapping with the third light-emitting region; a color conversion material layer, filled into the first opening; a first color filter component, overlapping with the color conversion material layer; and a second color filter component, overlapping with the second opening.
2 . The display device of claim 1 , further comprises: a black matrix, located between the first color filter component and the second color filter component, wherein the black matrix defines the first light-emitting region, the second light-emitting region and the third light-emitting region, and the second light-emitting region and the third light-emitting region are located at a same position.
3 . The display device of claim 1 , further comprises: a light-shielding layer, located above the circuit board, wherein the light-shielding layer comprises a first hole and a second hole, wherein the first light-emitting diode is located in the first hole and is surrounded by the light-shielding layer, and the second light-emitting diode and the third light-emitting diode are located in the second hole and are surrounded by the light-shielding layer.
4 . The display device of claim 1 , wherein a first sub-pixel comprises the first light-emitting diode, a second sub-pixel comprises the second light-emitting diode and the third light-emitting diode, and the first sub-pixel and the second sub-pixel constitute a pixel.
5 . The display device of claim 4 , wherein the first sub-pixel further comprises a first placement region and a first repair region, and the second sub-pixel further comprises a second placement region, a second repair region, a third placement region and a third repair region, wherein the first light-emitting diode is disposed in the first placement region or the first repair region, the second light-emitting diode is disposed in the second placement region or the second repair region, and the third light-emitting diode is disposed in the third placement region or the third repair region.
6 . The display device of claim 1 , further comprises: a first protection layer, located between the color conversion material layer and the first color filter component; a second protection layer, located above the first light-emitting diode, the second light-emitting diode and the third light-emitting diode; and an adhesive layer, located between the first light-emitting diode and the second protection layer, between the second light-emitting diode and the second protection layer, and between the third light-emitting diode and the second protection layer.
7 . The display device of claim 1 , further comprises: a scattering material layer, filled in the second opening, wherein the scattering material layer is overlapping with the second light-emitting diode and the third light-emitting diode.
8 . The display device of claim 1 , wherein the color conversion material layer comprises at least one of quantum dot materials, phosphorescent materials, fluorescent materials, dyes and perovskite materials.
9 . The display device of claim 1 , wherein the first light-emitting diode and the third light-emitting diode comprise blue light-emitting diodes, the second light-emitting diode comprises a green light-emitting diode, and the color conversion material layer comprises a color conversion material that emits red light after absorbing blue light, the first color filter component comprises a red color filter component, and the second color filter component comprises a blue-green color filter component.
10 . The display device of claim 1 , wherein the first light-emitting diode and the third light-emitting diode comprise blue light-emitting diodes, the second light-emitting diode comprises a red light-emitting diode, and the color conversion material layer comprises a color conversion material that emits green light after absorbing blue light, the first color filter component comprises a green color filter component, and the second color filter component comprises a purple color filter component.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims the priority benefit of Taiwan application no. 112116499, filed on May 3, 2023. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification. BACKGROUND Technical Field The present invention relates to a display device. Description of Related Art With the advancement of technology, the resolution of display panels is getting higher and higher. In order to increase the resolution of the display panel, the size of various components in the display panel must inevitably be reduced, which greatly increases the difficulty of the process. For example, in light-emitting diode display devices, color conversion materials are usually used to convert the color of the light emitted by the light-emitting diodes. In current technology, inkjet methods can be used to form the color conversion materials. However, when manufacturing high-resolution display panels, because the size of the pixels is very small, it is necessary to place the color conversion material in a very small area, which leads to insufficient yield of the inkjet process. SUMMARY The present invention provides a display device that can improve the manufacturing yield of color conversion material layer. At least one embodiment of the present invention provides a display device, which includes a circuit board, a first light-emitting diode, a second light-emitting diode, a third light-emitting diode, a bank structure, a color conversion material layer, a first color filter component and the second color filter component. The first to third light-emitting diodes are located above the circuit board, wherein the first and third light-emitting diodes are light-emitting diodes of the same color, and the first and second light-emitting diodes are light-emitting diodes of different colors. The bank structure is located above the circuit board and has a first opening and a second opening. The first opening is overlapping with the first light-emitting diode, and the second opening is overlapping with the second light-emitting diode and the third light-emitting diode. The first light-emitting diode, the second light-emitting diode and the third light-emitting diode are respectively configured to cause the display device to generate a first light-emitting region, a second light-emitting region and a third light-emitting region. The second light-emitting region is overlapping with the third light-emitting region. The color conversion material layer is filled in the first opening. The first color filter component is overlapping with the color conversion material layer. The second color filter component is overlapping with the second opening. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is a partial top view of a display device according to an embodiment of the present invention. FIG. 1B is a schematic cross-sectional view of a display device according to an embodiment of the present invention. FIG. 1C is the relationship between the light intensity ratio of the first sub-pixel and the width of the first opening according to some embodiments of the present invention. FIG. 1D is the relationship between the light intensity ratio of the second sub-pixel and the width of the second opening according to some embodiments of the present invention. FIGS. 2A to 2E are schematic cross-sectional views of a manufacturing method of a display device according to an embodiment of the present invention. FIG. 3 is a schematic cross-sectional view of a display device according to an embodiment of the present invention. FIG. 4 is a schematic cross-sectional view of a display device according to an embodiment of the present invention. DESCRIPTION OF THE EMBODIMENTS FIG. 1A is a partial top view of a display device according to an embodiment of the present invention. FIG. 1B is a schematic cross-sectional view of a display device according to an embodiment of the present invention, wherein FIG. 1B corresponds to the position of line A-A′ in FIG. 1A. It should be noted here that the display device 10 may include multiple pixels PX arranged in an array. For ease of explanation, FIG. 1A shows the first light-emitting diode L1, the second light-emitting diode L2, the third light-emitting diode L3, and the bank structure 240 corresponding to one of the pixels PX of the display device 10, and omits other components. In this embodiment, the first sub-pixel SP1 includes the first light-emitting diode L1, the second sub-pixel SP2 includes the second light-emitting diode L2 and the third light-emitting diode L3, and the first sub-pixel SP1 and the second sub-pixel SP2 constitute into a pixel PX. In some embodiments, the first sub-pixel SP1 and the second sub-pixel structure SP2 each have a width (or length) of 20 micrometers to 70 micrometers. Referring to FIG. 1A and FIG. 1B. The display device 10 includes a circuit board 100, the first light-emitting diode L1, the sec