US-20260130067-A1 - DISPLAY DEVICE AND ELECTRONIC DEVICE INCLUDING THE DISPLAY DEVICE

US20260130067A1US 20260130067 A1US20260130067 A1US 20260130067A1US-20260130067-A1

Abstract

Provided a display device which includes a first substrate; a second substrate; a sealing layer; and spacers supporting a gap between the first substrate and the second substrate. The first substrate includes a first support substrate and an element layer including light emitting elements disposed in emission areas. The second substrate includes a second support substrate and a color conversion layer. The color conversion layer includes main conversion portions respectively overlapping the emission areas and having a first thickness; dummy conversion portions arranged side by side with each other in a partial area of a non-display area in contact with a display area; and a partition wall disposed between the main 10 conversion portions and the dummy conversion portions. Each of at least some dummy conversion portions among the dummy conversion portions has a second thickness greater than the first thickness.

Inventors

Yun Mo Chung
Dae Woo Lee
Woo Sik JUN

Assignees

SAMSUNG DISPLAY CO., LTD.

Dates

Publication Date: 20260507
Application Date: 20250725
Priority Date: 20241105

Claims (20)

1 . A display device comprising: a first substrate and a second substrate facing each other; a sealing layer which bonds the first substrate and the second substrate; and spacers supporting a gap between the first substrate and the second substrate, wherein the first substrate comprises: a first support substrate comprising: a display area comprising emission areas arranged side by side with each other, and a non-display area surrounding the display area; and an element layer comprising light emitting elements disposed in the emission areas on the first support substrate, and the second substrate comprises: a second support substrate comprising the display area and the non-display area; and a color conversion layer disposed on a surface of the second support substrate facing the first support substrate, wherein the color conversion layer comprises: main conversion portions respectively overlapping the emission areas and having a first thickness; dummy conversion portions arranged side by side with each other in a partial area of the non-display area in contact with the display area; and a partition wall disposed between the main conversion portions and the dummy conversion portions, wherein each of at least some dummy conversion portions among the dummy conversion portions has a second thickness greater than the first thickness.
2 . The display device of claim 1 , wherein: the element layer comprises: a power supply auxiliary line disposed in the non-display area and overlapping the dummy conversion portions; through holes formed in the power supply auxiliary line and arranged side by side with each other; and hole cap portions covering the through holes and spaced apart from each other, the spacers overlap the partition wall, and at least one spacer, which overlaps the partition wall between the dummy conversion portions among the spacers, overlaps at least one of the hole cap portions.
3 . The display device of claim 2 , wherein: the first substrate further comprises: a circuit layer disposed on the first support substrate; and an encapsulation layer covering the element layer, wherein the element layer is disposed on the circuit layer, the element layer comprises: first light emitting electrodes disposed in the emission areas on the circuit layer; a pixel defining layer which is disposed on the circuit layer, overlaps a non-emission area between the emission areas, and covers an edge of each of the first light emitting electrodes; a light emitting layer disposed on the first light emitting electrodes; and a second light emitting electrode disposed on the light emitting layer, each of the light emitting elements has a structure in which the light emitting layer is sandwiched between a respective first light emitting electrode and the second light emitting electrode, the power supply auxiliary line is disposed in a same layer as the first light emitting electrodes, and the hole cap portions are disposed in a same layer as the pixel defining layer.
4 . The display device of claim 3 , wherein the encapsulation layer comprises: a first encapsulation layer disposed on the second light emitting electrode and comprising an inorganic insulating material; a second encapsulation layer disposed on the first encapsulation layer, overlapping the display area, and comprising an organic insulating material; and a third encapsulation layer covering the second encapsulation layer and comprising the inorganic insulating material, wherein the spacers are in contact with the third encapsulation layer.
5 . The display device of claim 3 , wherein the circuit layer comprises: light emitting pixel drivers electrically connected to the first light emitting electrodes; and a power supply line disposed in the non-display area, wherein the power supply line is electrically connected to the second light emitting electrode and the power supply auxiliary line.
6 . The display device of claim 2 , wherein: one or more dummy conversion portions among the dummy conversion portions are adjacent to corners of the second substrate and have the second thickness, and one or more remaining dummy conversion portions among the dummy conversion portions have the first thickness.
7 . The display device of claim 2 , wherein the dummy conversion portions have the second thickness.
8 . The display device of claim 2 , wherein a difference between the first thickness and the second thickness is about 0.5 μm or more.
9 . The display device of claim 2 , wherein: the emission areas comprise: a first emission area which emits light of a first wavelength band; a second emission area which emits light of a second wavelength band that is lower than the first wavelength band; and a third emission area which emits light of a third wavelength band that is lower than the second wavelength band, the light emitting elements emit light of a fourth wavelength band that is equal to or lower than the third wavelength band, and the main conversion portions comprise: a first color conversion portion which overlaps the first emission area and converts light of the fourth wavelength band into light of the first wavelength band; a second color conversion portion which overlaps the second emission area and converts light of the fourth wavelength band into light of the second wavelength band; and a light transmitting portion which overlaps the third emission area and transmits light of the fourth wavelength band.
10 . The display device of claim 9 , wherein: among the at least some dummy conversion portions, a width of a first dummy conversion portion replacing the first color conversion portion is equal to a width of the first color conversion portion, among the at least some dummy conversion portions, a width of a second dummy conversion portion replacing the second color conversion portion is equal to a width of the second color conversion portion, and among the at least some dummy conversion portions, a width of a third dummy conversion portion replacing the light transmitting portion is equal to a width of the light transmitting portion.
11 . The display device of claim 9 , wherein: among the at least some dummy conversion portions, a width of a first dummy conversion portion replacing the first color conversion portion is smaller than a width of the first color conversion portion, among the at least some dummy conversion portions, a second dummy conversion portion replacing the second color conversion portion is smaller than a width of the second color conversion portion, and among the at least some dummy conversion portions, a third dummy conversion portion replacing the light transmitting portion is smaller than a width of the light transmitting portion.
12 . The display device of claim 9 , wherein: the second substrate further comprises: a color filter layer disposed on a surface of the second support substrate; and a filter capping layer covering the color filter layer, the color conversion layer is disposed on the filter capping layer, and the color filter layer comprises: a first filter portion which overlaps the first emission area and transmits light of the first wavelength band; a second filter portion which overlaps the second emission area and transmits light of the second wavelength band; a third filter portion which overlaps the third emission area and transmits light of the third wavelength band; and a light blocking portion disposed between the first filter portion, the second filter portion, and the third filter portion.
13 . An electronic device comprising: a display device displaying an image, wherein the display device comprises: a first substrate and a second substrate facing each other; a sealing layer which bonds the first substrate and the second substrate; and spacers supporting a gap between the first substrate and the second substrate, wherein the first substrate comprises: a first support substrate comprising: a display area comprising emission areas arranged side by side with each other, and a non-display area surrounding the display area; and a circuit layer disposed on the first support substrate; an element layer comprising light emitting elements disposed in the emission areas on the circuit layer, and an encapsulation layer covering the element layer, the second substrate comprises: a second support substrate comprising the display area and the non-display area; a color conversion layer disposed on a surface of the second support substrate facing the first support substrate; a filter capping layer covering the color filter layer; a color conversion layer disposed on the filter capping layer; and a color conversion capping layer covering the color conversion layer, wherein the color conversion layer comprises: main conversion portions respectively overlapping the emission areas and having a first thickness; dummy conversion portions arranged side by side with each other in a partial area of the non-display area in contact with the display area; and a partition wall disposed between the main conversion portions and the dummy conversion portions, wherein each of at least some dummy conversion portions among the dummy conversion portions has a second thickness greater than the first thickness.
14 . The electronic device of claim 13 , wherein: the element layer comprises: first light emitting electrodes disposed in the emission areas on the circuit layer; a pixel defining layer which is disposed on the circuit layer, overlaps a non-emission area between the emission areas, and covers an edge of each of the first light emitting electrodes; a light emitting layer disposed on the first light emitting electrodes; a second light emitting electrode disposed on the light emitting layer; a power supply auxiliary line disposed in the non-display area on the circuit layer and overlapping the dummy conversion portions; through holes formed in the power supply auxiliary line and arranged side by side with each other; and hole cap portions which are disposed in a same layer as the pixel defining layer, cover the through holes, and are spaced apart from each other, each of the light emitting elements has a structure in which the light emitting layer is sandwiched between a respective first light emitting electrode and the second light emitting electrode, the spacers overlap the partition wall, and at least one spacer, which overlaps the partition wall between the dummy conversion portions among the spacers, overlaps at least one of the hole cap portions.
15 . The electronic device of claim 14 , wherein the encapsulation layer comprises: a first encapsulation layer disposed on the second light emitting electrode and comprising an inorganic insulating material; a second encapsulation layer disposed on the first encapsulation layer, overlapping the display area, and comprising an organic insulating material; and a third encapsulation layer covering the second encapsulation layer and comprising the inorganic insulating material, wherein the spacers are in contact with the third encapsulation layer.
16 . The electronic device of claim 13 , wherein: one or more dummy conversion portions among the dummy conversion portions are adjacent to corners of the second substrate and have the second thickness, and one or more remaining dummy conversion portions among the dummy conversion portions have the first thickness.
17 . The electronic device of claim 13 , wherein the dummy conversion portions have the second thickness.
18 . The electronic device of claim 13 , wherein: the emission areas comprise: a first emission area which emits light of a first wavelength band; a second emission area which emits light of a second wavelength band that is lower than the first wavelength band; and a third emission area which emits light of a third wavelength band that is lower than the second wavelength band, the light emitting elements emit light of a fourth wavelength band that is equal to or lower than the third wavelength band, and the main conversion portions comprise: a first color conversion portion which overlaps the first emission area and converts light of the fourth wavelength band into light of the first wavelength band; a second color conversion portion which overlaps the second emission area and converts light of the fourth wavelength band into light of the second wavelength band; and a light transmitting portion which overlaps the third emission area and transmits light of the fourth wavelength band.
19 . The electronic device of claim 18 , wherein: among the at least some dummy conversion portions, a width of a first dummy conversion portion replacing the first color conversion portion is equal to a width of the first color conversion portion, among the at least some dummy conversion portions, a width of a second dummy conversion portion replacing the second color conversion portion is equal to a width of the second color conversion portion, and among the at least some dummy conversion portions, a width of a third dummy conversion portion replacing the light transmitting portion is equal to a width of the light transmitting portion.
20 . The electronic device of claim 18 , wherein: among the at least some dummy conversion portions, a width of a first dummy conversion portion replacing the first color conversion portion is smaller than a width of the first color conversion portion, among the at least some dummy conversion portions, a width of a second dummy conversion portion replacing the second color conversion portion is smaller than a width of the second color conversion portion, and among the at least some dummy conversion portions, a width of a third dummy conversion portion replacing the light transmitting portion is smaller than a width of the light transmitting portion.

Description

This application claims priority to Korean Patent Application No. 10-2024-0155264, filed on Nov. 5, 2024, and all the benefits accruing therefrom under 35 U.S.C. § 119, the content of which in its entirety is herein incorporated by reference. BACKGROUND 1. Field The present disclosure relates to a display device and an electronic device including the display device. 2. Description of the Related Art With the advance of information-oriented society, the demand is increasing for display devices capable of displaying images in various ways. For example, display devices are employed in various electronic devices such as, for example, smartphones, digital cameras, laptop computers, navigation devices, and smart televisions. The display devices may be a flat panel display device such as, for example, a liquid crystal display device, a field emission display device and a light emitting display device. Examples of the light emitting display device may include an organic light emitting display device including organic light emitting elements, an inorganic light emitting display device including inorganic light emitting elements such as, for example, inorganic semiconductors, and a micro light emitting display device including micro light emitting elements. An organic light emitting display device displays an image using light emitting elements, each including a light emitting layer formed of an organic light emitting material. As described herein, the organic light emitting display device implements image display using a self-light emitting element, and thus may have relatively superior performance in power consumption, response speed, luminous efficiency, luminance, and wide viewing angle compared to other display devices. In some display devices, a display surface from which light is emitted may include a display area in which an image is displayed, and a non-display area around the display area. Emission areas emitting light with respective luminances and colors may be arranged in the display area. SUMMARY The display device may include a first substrate and a second substrate facing each other, and a sealing layer which bonds the first substrate and the second substrate. The first substrate may include light emitting elements disposed in the emission areas arranged in the display area, and may emit light from the emission areas at respective luminances. The second substrate may selectively emit the light from the emission areas emitted from the first substrate to the outside. The display device may further include spacers that support a gap between the first substrate and the second substrate. The spacers may be arranged to be spaced apart from each other in the display area and the non-display area. To improve the reliability of adhesion between each of the first substrate and the second substrate and the sealing layer, physical pressure for bonding the first substrate and the second substrate may be relatively strongly applied partially to the non-display area overlapping or adjacent to the sealing layer. As a result, a pressing defect of the spacers arranged in the non-display area may easily be induced. In some cases, the pressing defect of the spacers may easily cause defects such as, for example, cracks or breakage to an inorganic insulating material of an encapsulation layer, and the cracked or broken inorganic insulating material may be a permeation path for oxygen or moisture. Accordingly, the display quality and lifespan of the display device may be deteriorated. In view of the foregoing, aspects of the present disclosure provide a display device and an electronic device including the same, capable of improving the display quality and lifespan of the display device and the electronic device by reducing the pressing defect of spacers due to physical pressure applied when a first substrate and a second substrate are bonded. However, aspects of the present disclosure are not restricted to the one set forth herein. The above and other aspects of the present disclosure will become more apparent to one of ordinary skill in the art to which the present disclosure pertains by referencing the detailed description of the present disclosure given below. According to an aspect of the present disclosure, a display device includes a first substrate and a second substrate facing each other; a sealing layer which bonds the first substrate and the second substrate; and spacers supporting a gap between the first substrate and the second substrate. The first substrate includes a first support substrate including a display area including emission areas arranged side by side with each other, and a non-display area surrounding the display area; and an element layer including light emitting elements disposed in the emission areas on the first support substrate. The second substrate includes a second support substrate including the display area and the non-display area; and a color conversion layer disposed on a surface of th