EP-4142452-B1 - DISPLAY DEVICE AND METHOD OF MANUFACTURING THE SAME

EP4142452B1EP 4142452 B1EP4142452 B1EP 4142452B1EP-4142452-B1

Inventors

KIM, Inok
LEE, SANGHUN
Kim, Chansu
OH, KEUNCHAN
LEE, GAK SEOK
LEE, Soyun
JANG, JIEUN
JANG, CHANG-SOON

Dates

Publication Date: 20260506
Application Date: 20220726

Claims (4)

A display device, comprising: a transistor substrate (SUB) comprising a driving element and a light emitting element (ED1) connected to the driving element, and having a display area (DA) and a non-display area (NDA) surrounding the display area; a bank layer (BK1) on the non-display area of the transistor substrate, and exposing an outer area (EXA) of the non-display area of the transistor substrate that is opposite to the display area; an inorganic insulating layer (IIL1) covering an upper surface of the bank layer (BK1), a side surface of the bank layer, and the outer area (EXA) of the transistor substrate; a low refractive index layer (LR) on the inorganic insulating layer (IIL1); a first color filter layer (CF1) on the non-display area (NDA) to cover a portion of an upper surface of the inorganic insulating layer (IIL1), and a side surface of the inorganic insulating layer, a color converting layer (CVL1) on the light emitting element (ED1) to overlap the light emitting element; a second color filter layer (CF2), on the first color filter layer on the non-display area; and a third color filter layer (CF3), on the second color filter layer on the non-display area; wherein the low refractive index layer (LR) has a refractive index that is lower than the refractive index of the color converting layer (CVL1), wherein the first color filter layer seals the bank layer, wherein a side surface of the first color filter layer is exposed to an outside of the display device.
The display device of claim 1, wherein the first color filter layer seals the bank layer, and side surfaces of the first to third color filter layers are exposed to the outside of the display device.
The display device of any one of the preceding claims, wherein the low refractive index layer overlaps the bank layer on the upper surface of the inorganic insulating layer.
A method of manufacturing a display device, the method comprising: forming a first bank layer (BK1) on a non-display area of a transistor substrate (SUB) comprising a driving element and a light-emitting element (ED1) connected to the driving element, and a color converting layer (CVL1) on the light emitting element (ED1) to overlap the light emitting element, and having a display area (DA), and the non-display area (NDA) surrounding the display area; removing a portion of the first bank layer (BK1) to form a second bank layer (BK2) spaced apart from the display area and to define a trench; forming a first inorganic insulating layer (IIl1) on the first bank layer, on the second bank layer, and on portions of the first bank layer and the second bank layer defining the trench; forming a low refractive index layer (LR) on the first inorganic insulating layer (IIL1) to overlap at least a portion of the first bank layer, wherein the low refractive index layer (LR) has a refractive index that is lower than the refractive index of the color converting layer (CVL1); forming a first color filter layer (CF1) on the first inorganic insulating layer (IIL1) and filling the trench; forming a second color filter layer (CF2) on the first color filter layer; forming a third color filter layer (CF3) on the second color filter layer; and cutting the display device between the first bank layer and the second bank layer such that a side surface of the first color filter layer (CF1) is exposed to an outside of the display device.

Description

BACKGROUND 1. Field Embodiments relate to a display device capable of displaying an image, and a method of manufacturing the display device. 2. Description of the Related Art A display device is manufactured and used in various ways. The display device may display light to provide visual information to the user. Such a display device may include a liquid crystal display device that emits light using a liquid crystal layer, an inorganic light emitting display device that emits light using an inorganic light emitting material, and an organic light emitting display device that emits light using an organic light emitting material. Light emitting materials may be sensitive to moisture or heat. Accordingly, a sealing member may be located on an outer portion of the display device to protect the light emitting materials. The sealing member may reduce or prevent moisture or heat penetrating into the display device and, at the same time, may serve to protect the display device from external impact. US2018/0182818A1 discloses a display device having a colour filter array. SUMMARY Embodiments may provide a display device with improved durability. Embodiments may provide a method of manufacturing a display device with improved durability. According to the invention, there is provided a display device according to claim 1 and a method of manufacturing a display device according to claim 4. BRIEF DESCRIPTION OF THE DRAWINGS Illustrative, non-limiting embodiments will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings. FIG. 1 is a plan view illustrating a display device according to some embodiments.FIGS. 2A and 2B are cross-sectional views illustrating some embodiments taken along the line I-I' of FIG. 1.FIG. 3 is a cross-sectional view illustrating some embodiments in which a pixel included in the display device of FIG. 1 is cut along the line II-II'.FIGS. 4 to 13 are views illustrating a method of manufacturing the display device of FIG. 1.FIG. 14 is a block view illustrating an electronic device according to some embodiments.FIG. 15 is a view illustrating some embodiments in which the electronic device of FIG. 14 is implemented as a computer monitor.FIG. 16 is a view illustrating some embodiments in which the electronic device of FIG. 14 is implemented as a smartphone. DETAILED DESCRIPTION Aspects of some embodiments of the present disclosure and methods of accomplishing the same may be understood more readily by reference to the detailed description of embodiments and the accompanying drawings. Hereinafter, embodiments will be described in more detail with reference to the accompanying drawings. The described embodiments, however, may have various modifications and may be embodied in various different forms, and should not be construed as being limited to only the illustrated embodiments herein. Accordingly, processes, elements, and techniques that are not necessary to those having ordinary skill in the art for a complete understanding of the aspects of the present disclosure may not be described. Unless otherwise noted, like reference numerals, characters, or combinations thereof denote like elements throughout the attached drawings and the written description, and thus, descriptions thereof will not be repeated. Further, parts that are not related to, or that are irrelevant to, the description of the embodiments might not be shown to make the description clear. In the drawings, the relative sizes of elements, layers, and regions may be exaggerated for clarity. Additionally, the use of cross-hatching and/or shading in the accompanying drawings is generally provided to clarify boundaries between adjacent elements. As such, neither the presence nor the absence of cross-hatching or shading conveys or indicates any preference or requirement for particular materials, material properties, dimensions, proportions, commonalities between illustrated elements, and/or any other characteristic, attribute, property, etc., of the elements, unless specified. Various embodiments are described herein with reference to sectional illustrations that are schematic illustrations of embodiments and/or intermediate structures. As such, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Further, specific structural or functional descriptions disclosed herein are merely illustrative for the purpose of describing embodiments according to the concept of the present disclosure. Thus, embodiments disclosed herein should not be construed as limited to the particular illustrated shapes of regions, but are to include deviations in shapes that result from, for instance, manufacturing. For example, an implanted region illustrated as a rectangle will, typically, have rounded or curved features and/or a gradient of implant concentration at its edges rather than a binary change from implanted to no