CN-114387877-B - Window member, display device, and method of manufacturing display device

CN114387877BCN 114387877 BCN114387877 BCN 114387877BCN-114387877-B

Abstract

A window member, a display device, and a method of manufacturing the display device are provided. The display device includes a display panel and a window member on the display panel, wherein the window member includes a window substrate including a flexible portion alternately positioned with a first region having a first rigidity and a second region having a second rigidity smaller than the first rigidity, a buffer layer on the window substrate and having a refractive index smaller than that of the window substrate, and a filler layer on the buffer layer and having a refractive index smaller than that of the buffer layer.

Inventors

JIN XIANGXUN
Ju Minxiang
Jin Guiman
Jin Rouli
Cui Minxun
HUANG SHENGZHEN

Assignees

三星显示有限公司

Dates

Publication Date: 20260512
Application Date: 20210902
Priority Date: 20201006

Claims (12)

1. A display device, comprising: display panel, and A window member on the display panel, Wherein the window member comprises: a window substrate comprising a flexible portion in which first regions having a first rigidity and second regions having a second rigidity less than the first rigidity are alternately positioned; A buffer layer on the window substrate and having a refractive index less than that of the window substrate, and A filler layer on the buffer layer and having a refractive index less than the refractive index of the buffer layer, Wherein the buffer layer is located between the window substrate and the filler layer; The second region comprising a plurality of recesses or a plurality of holes through the window substrate; at least a portion of the cushioning layer is located at an inner surface of each of the plurality of recesses or the plurality of holes; The filling layer includes a portion located within the plurality of recesses or the plurality of holes, and Portions of the fill layer located within the plurality of recesses or the plurality of holes are in direct contact with portions of the buffer layer located within the plurality of recesses or the plurality of holes.
2. The display device of claim 1, wherein the window substrate comprises: A first rigid portion located at one side of the flexible portion, and A second rigid portion located at the other side of the flexible portion, Wherein the first region is made of the same material as the first rigid portion and the second rigid portion.
3. The display device according to claim 2, wherein the filler layer overlaps the first rigid portion, the second rigid portion, and the flexible portion.
4. The display device according to claim 1, wherein a difference between the refractive index of the filler layer and the refractive index of the buffer layer is less than or equal to 0.003.
5. The display device of claim 1, wherein the refractive index of the buffer layer is between 1.3 and 1.6.
6. The display device of claim 1, wherein the buffer layer comprises a plurality of layers having different refractive indices.
7. The display device of claim 6, wherein the different refractive indices of the plurality of layers increase in a direction from the filler layer toward the window substrate.
8. The display device according to claim 6, wherein a thickness of each of the plurality of layers is 1/4 to 1/2 of a wavelength of incident light incident on the buffer layer.
9. The display device of claim 1, wherein the buffer layer comprises at least one of Na 3 AlF 6 、MgF 2 、AlF 3 、LiF、CaF 2 、SiO 2 、Al 2 O 3 、SnO 2 、Y 2 O 3 and MgO.
10. A window member, comprising: a window substrate comprising a flexible portion in which first regions having a first rigidity and second regions having a second rigidity less than the first rigidity are alternately positioned; A buffer layer on the window substrate and having a refractive index less than that of the window substrate, and A filler layer on the buffer layer and having a refractive index less than the refractive index of the buffer layer, Wherein the buffer layer is located between the window substrate and the filler layer; The second region comprising a plurality of recesses or a plurality of holes through the window substrate; at least a portion of the cushioning layer is located at an inner surface of each of the plurality of recesses or the plurality of holes; The filling layer includes a portion located within the plurality of recesses or the plurality of holes, and Portions of the fill layer located within the plurality of recesses or the plurality of holes are in direct contact with portions of the buffer layer located within the plurality of recesses or the plurality of holes.
11. The window member of claim 10, wherein the buffer layer includes a plurality of layers having different refractive indices.
12. A method of manufacturing a display device, the method comprising: forming a pattern in a window substrate comprising a first region having a first rigidity and a second region having a second rigidity less than the first rigidity; forming a buffer layer having a refractive index smaller than that of the window substrate on the pattern, and Forming a filling layer on the buffer layer, the filling layer having a refractive index smaller than the refractive index of the buffer layer, Wherein the buffer layer is located between the window substrate and the filler layer; Forming the pattern includes forming holes or recesses in the second region; forming the buffer layer includes forming the buffer layer at an inner surface of the hole or the recess; the filling layer includes a portion located within the hole or the recess, and A portion of the filler layer located within the hole or recess is in direct contact with a portion of the buffer layer located within the hole or recess.

Description

Window member, display device, and method of manufacturing display device Cross Reference to Related Applications The present application claims priority and rights of korean patent application No. 10-2020-0128863, filed on 6 th 10 th 2020, the entire contents of which are incorporated herein by reference. Technical Field The present disclosure relates to a window member, a display device, and a method of manufacturing a display device. Background With the development of multimedia, display devices have become more important. In response to this development, various types (e.g., appropriate kinds) of displays are being used, such as Liquid crystal display (Liquid CRYSTAL DISPLAY, LCD) devices, organic Light-Emitting Diode (OLED) display devices, and the like. Recently, foldable display devices employing flexible display panels have been developed to provide a large screen and improve portability in use. Each component of the flexible display panel is made of a material having flexibility so as to be bendable. The window member applied to the flexible display panel may also have flexibility, allowing such window member to be folded or unfolded together with the flexible display panel to which such window member is applied. For this, a pattern for enhancing flexibility of the window member may be formed in at least a portion of the window member. Disclosure of Invention Aspects of embodiments of the present disclosure relate to a window member that reduces visibility of a pattern formed in the window member, a display device including the window member, and a method of manufacturing the display device. However, it should be noted that aspects of embodiments of the present disclosure are not limited to the above-described aspects of embodiments, and other aspects of embodiments of the present disclosure will be apparent to those skilled in the art from the following description. According to some embodiments of the present disclosure, there is provided a display device including a display panel and a window member located on the display panel, wherein the window member includes a window substrate including a first region having a first rigidity and a second region having a second rigidity smaller than the first rigidity alternately positioned (e.g., the first region has a rigidity smaller than the second region) and a buffer layer located on the window substrate and having a refractive index smaller than a refractive index of the window substrate, and a filler layer located on the buffer layer and having a refractive index smaller than a refractive index of the buffer layer. According to other embodiments of the present disclosure, a window member is provided that includes a window substrate including a flexible portion having a first region of a first rigidity and a second region of a second rigidity that is less than the first rigidity, a buffer layer on the window substrate and having a refractive index that is less than a refractive index of the window substrate, and a filler layer on the buffer layer and having a refractive index that is less than a refractive index of the buffer layer. According to other embodiments of the present disclosure, there is provided a method of manufacturing a display device including forming a pattern including a first region having a first rigidity and a second region having a second rigidity smaller than the first rigidity in a window substrate, forming a buffer layer having a refractive index smaller than that of the window substrate on the pattern, and forming a filling layer having a refractive index smaller than that of the buffer layer on the buffer layer. Drawings The above and other aspects and features of the present invention will become more apparent by describing in detail various aspects thereof with reference to the attached drawings, in which: Fig. 1 is a perspective view illustrating a display device according to some embodiments of the present disclosure; Fig. 2 is a perspective view illustrating an invaginated state of a display device according to some embodiments of the present disclosure; Fig. 3 is a perspective view illustrating an folded-out state of a display device according to some embodiments of the present disclosure; Fig. 4 is a cross-sectional view illustrating a display module of a display device according to some embodiments of the present disclosure; fig. 5 is a cross-sectional view illustrating a display panel of a display device according to some embodiments of the present disclosure; fig. 6 is a perspective view illustrating a window member of a display device according to some embodiments of the present disclosure; FIG. 7 is a cross-sectional view taken along line A-A' of FIG. 6, according to some embodiments of the present disclosure; fig. 8 is an enlarged cross-sectional view illustrating portion P of fig. 7 according to some embodiments of the present disclosure; FIG. 9 is a cross-sectional view illustrating a window member according t