US-12628499-B2 - Display device and method of repairing the same

US12628499B2US 12628499 B2US12628499 B2US 12628499B2US-12628499-B2

Abstract

A display device includes a pixel unit configured to emit light. The display device includes a lower substrate, a plurality of light-emitting devices, an upper substrate, a bank layer, and a functional layer. The plurality of light-emitting devices is on the lower substrate. The upper substrate is on the lower substrate. The plurality of light-emitting devices is between the upper substrate and the lower substrate. The bank layer is on one surface of the upper substrate facing the lower substrate. The bank layer includes partition walls defining a central opening corresponding to the pixel unit and an auxiliary opening adjacent to the central opening. The functional layer fills the central opening. The functional layer includes at least one of quantum dots and scattering particles. The plurality of light-emitting devices includes a main light-emitting device overlapping the central opening and an auxiliary light-emitting device overlapping the auxiliary opening.

Inventors

Jiseong YANG
Gyeongeun Eoh
Myoungjong LEE
Songee LEE
Siwan JEON

Assignees

SAMSUNG DISPLAY CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20220610
Priority Date: 20210923

Claims (11)

1 . A display device comprising a pixel unit configured to emit light, the display device comprising: a lower substrate; a plurality of light-emitting devices on the lower substrate; an upper substrate on the lower substrate, the plurality of light-emitting devices being between the upper substrate and the lower substrate; a bank layer on one surface of the upper substrate facing the lower substrate, the bank layer comprising partition walls defining a central opening corresponding to the pixel unit and an auxiliary opening adjacent to the central opening; a color filter layer between the upper substrate and the bank layer and overlapping the central opening and the auxiliary opening, the color filter layer comprising a plurality of color filters overlapping each other in a thickness direction; and a functional layer filling the central opening, the functional layer comprising at least one of quantum dots and scattering particles, wherein the plurality of light-emitting devices comprises a main light-emitting device overlapping the central opening and an auxiliary light-emitting device overlapping the auxiliary opening, wherein the color filters of the color filter layer comprising a first color filter overlapping a first opening of the central opening, a second color filter overlapping a second opening of the central opening, and a third color filter overlapping a third opening of the central opening, wherein the first color filter, the second color filter, and the third color filter overlap each other in the auxiliary opening.
2 . The display device of claim 1 , wherein, in a plan view, the auxiliary opening has a size less than or equal to a size of the central opening.
3 . The display device of claim 1 , wherein: the pixel unit comprises a first pixel, a second pixel, and a third pixel, the first to third pixels being configured to emit light of different colors than each other; the central opening comprises the first opening corresponding to the first pixel, the second opening corresponding to the second pixel, and the third opening corresponding to the third pixel; the auxiliary opening comprises a plurality of auxiliary openings; and each of the plurality of auxiliary openings is arranged adjacent to at least one of the first opening, the second opening, and the third opening.
4 . The display device of claim 3 , wherein the functional layer comprises a first quantum dot layer filling the first opening, a second quantum dot layer filling the second opening, and a light-transmitting layer filling the third opening.
5 . The display device of claim 4 , wherein: each of the first quantum dot layer, the second quantum dot layer, and the light-transmitting layer comprises scattering particles; the first quantum dot layer further comprises a first quantum dot; and the second quantum dot layer further comprises a second quantum dot.
6 . The display device of claim 1 , wherein a thickness of the color filter layer overlapping the auxiliary opening is greater than 0 μm and less than 10 μm.
7 . The display device of claim 6 , wherein: the first quantum dot layer is configured to convert light having a wavelength belonging to a first wavelength band into light having a wavelength belonging to a second wavelength band; and the second quantum dot layer is configured to convert light having a wavelength belonging to the first wavelength band into light having a wavelength belonging to a third wavelength band.
8 . The display device of claim 1 , wherein each of the plurality of light-emitting devices comprises: a pixel electrode; an opposite electrode on the pixel electrode; and a light-emitting layer between the pixel electrode and the opposite electrode.
9 . A display device comprising a pixel unit configured to emit light, the display device comprising: a lower substrate; a plurality of light-emitting devices on the lower substrate; an upper substrate on the lower substrate, the plurality of light-emitting devices being between the upper substrate and the lower substrate; a bank layer on one surface of the upper substrate facing the lower substrate, the bank layer comprising partition walls defining a central opening corresponding to the pixel unit and an auxiliary opening adjacent to the central opening; a color filter layer between the upper substrate and the bank layer and overlapping the central opening and the auxiliary opening, the color filter layer comprising a plurality of color filters overlapping each other in a thickness direction; a functional layer filling the central opening, the functional layer comprising at least one of quantum dots and scattering particles; and a low refractive index layer between the color filter layer and the functional layer, wherein the plurality of light-emitting devices comprises a main light-emitting device overlapping the central opening and an auxiliary light-emitting device overlapping the auxiliary opening, wherein the color filters of the color filter layer comprising a first color filter overlapping a first opening of the central opening, a second color filter overlapping a second opening of the central opening, and a third color filter overlapping a third opening of the central opening, wherein the first color filter, the second color filter, and the third color filter overlap each other in the auxiliary opening.
10 . The display device of claim 3 , wherein, in a plan view, each of the plurality of auxiliary openings has a size less than or equal to a size of a nearest opening from among the first opening, the second opening, and the third opening.
11 . The display device of claim 1 , wherein the functional layer is not filled in the auxiliary opening.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims priority to and the benefit of Korean Patent Application No. 10-2021-0125915, filed Sep. 23, 2021, which is hereby incorporated by reference for all purposes as if fully set forth herein. BACKGROUND Field One or more embodiments generally relate to a display device and a method of repairing the display device. Discussion A display device is a device for visually displaying data. Display devices are used as display units in small products, such as mobile phones, and large products, such as televisions. A display device may include a plurality of pixels that emit light by receiving an electrical signal to display an image to the outside. For a full-color display device, a plurality of pixels may emit light of different colors. To this end, at least some pixels of the display device may have a filter portion for converting colors. Accordingly, light of a first wavelength band generated by a light-emitting unit of some pixels may be converted into light of a second wavelength band while passing through a corresponding filter portion to be extracted to the outside. The above information disclosed in this section is only for understanding the background of the inventive concepts, and, therefore, may contain information that does not form prior art. SUMMARY One or more embodiments are capable of providing a display device including a structure of a light-emitting display. One or more embodiments are capable of providing a method of repairing a display device including a structure of a light-emitting display. Additional aspects will be set forth in the detailed description which follows, and, in part, will be apparent from the disclosure, or may be learned by practice of the inventive concepts. According to an embodiment, a display device includes a pixel unit configured to emit light. The display device includes a lower substrate, a plurality of light-emitting devices, an upper substrate, a bank layer, and a functional layer. The plurality of light-emitting devices is on the lower substrate. The upper substrate is on the lower substrate. The plurality of light emitting devices is between the upper substrate and the lower substrate. The bank layer is on one surface of the upper substrate facing the lower substrate. The bank layer includes partition walls defining a central opening corresponding to the pixel unit and an auxiliary opening adjacent to the central opening. The functional layer fills the central opening. The functional layer includes at least one of quantum dots and scattering particles. The plurality of light-emitting devices includes a main light-emitting device overlapping the central opening and an auxiliary light-emitting device overlapping the auxiliary opening. According to an embodiment, a method of repairing a display device including a bank layer arranged on an upper substrate, the bank layer including partition walls defining a central opening corresponding to a pixel unit configured to emit light and an auxiliary opening adjacent to the central opening, includes: forming a replacement pixel unit using the auxiliary opening arranged adjacent to the central opening corresponding to the pixel unit including a defect; and replacing the defective pixel unit using the replacement pixel unit. Replacing the defective pixel unit includes: cutting off a path configured to supply power to a light-emitting device overlapping the defective pixel unit; and forming a path configured to supply power to a light-emitting device overlapping the replacement pixel unit. The foregoing general description and the following detailed description are illustrative and explanatory and are intended to provide further explanation of the claimed subject matter. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the inventive concepts, and are incorporated in and constitute a part of this specification, illustrate embodiments of the inventive concepts, and, together with the description, serve to explain principles of the inventive concepts. In the drawings: FIG. 1 is a perspective view of a display device according to an embodiment; FIG. 2 is a cross-sectional view of a portion of a display device according to an embodiment; FIGS. 3A and 3B are plan views of a display device according to an embodiment; FIG. 4 is a cross-sectional view of the display device of FIG. 3A taken along sectional line I-I′ according to an embodiment; FIG. 5 is a plan view of a display device in which a defective pixel is repaired according to an embodiment; FIGS. 6A, 6B, 6C, and 6D are cross-sectional views of a display device at various stages of repair according to an embodiment; FIG. 7 is a cross-sectional view of the display device of FIG. 5 taken along sectional line according to an embodiment; and FIG. 8 is a cross-sectional view of a portion of a display device in which a defective pixel is repaired according to