US-20260130095-A1 - DISPLAY DEVICE AND ELECTRONIC DEVICE

Abstract

A display device includes: a substrate; a transistor layer on an upper surface of the substrate; a display element layer on the transistor layer; an encapsulation layer on the display element layer; a polarizing layer on the encapsulation layer; a substrate cover layer on a lower surface of the substrate; and a through hole penetrating the substrate cover layer, the substrate, the transistor layer, the display element layer, the encapsulation layer, and the polarizing layer in a display area of the substrate, wherein a thickness of the substrate cover layer is constant throughout an entire area of the substrate cover layer.

Inventors

• Oh June Kwon
• Dae Il Kim
• Woo Yong Sung

Assignees

• SAMSUNG DISPLAY CO., LTD.

Dates

Publication Date

20260507

Application Date

20250714

Priority Date

20241104

Claims (20)

1. 1 . A display device comprising: a substrate; a transistor layer on an upper surface of the substrate; a display element layer on the transistor layer; an encapsulation layer on the display element layer; a polarizing layer on the encapsulation layer; a substrate cover layer on a lower surface of the substrate; and a through hole penetrating the substrate cover layer, the substrate, the transistor layer, the display element layer, the encapsulation layer, and the polarizing layer in a display area of the substrate, wherein a thickness of the substrate cover layer is constant throughout an entire area of the substrate cover layer.
2. 2 . The display device of claim 1 , wherein the substrate cover layer comprises: an upper surface contacts the lower surface of the substrate; a lower surface opposite the upper surface of the substrate cover layer; and an inner surface defining an inner wall of the through hole.
3. 3 . The display device of claim 2 , wherein the upper surface of the substrate cover layer and the lower surface of the substrate cover layer are parallel to each other.
4. 4 . The display device of claim 2 , wherein an internal angle between the upper surface of the substrate cover layer and the inner surface of the substrate cover layer is 90 degrees, and an internal angle between the lower surface of the substrate cover layer and the inner surface of the substrate cover layer is 90 degrees.
5. 5 . The display device of claim 1 , wherein the through hole comprises a plurality of sub-through holes having different diameters.
6. 6 . The display device of claim 5 , wherein the through hole comprises: a first sub-through hole penetrating the substrate; a second sub-through hole having a diameter larger than that of the first sub-through hole and penetrating the transistor layer, the display element layer, the encapsulation layer and the polarizing layer; and a third sub-through hole having a diameter larger than that of the second sub-through hole and penetrating the substrate cover layer.
7. 7 . The display device of claim 6 , wherein the second sub-through hole surrounds the first sub-through hole in a plan view.
8. 8 . The display device of claim 6 , wherein the third sub-through hole surrounds the first sub-through hole and the second sub-through hole in a plan view.
9. 9 . The display device of claim 5 , wherein the through hole comprises: a first sub-through hole penetrating the substrate cover layer and the substrate; and a second sub-through hole having a diameter larger than that of the first sub-through hole and penetrating the transistor layer, the display element layer, the encapsulation layer and the polarizing layer.
10. 10 . The display device of claim 9 , wherein the second sub-through hole surrounds the first sub-through hole in a plan view.
11. 11 . The display device of claim 1 , further comprising: a functional layer on the lower surface of the substrate cover layer.
12. 12 . The display device of claim 11 , wherein the through hole further penetrates the functional layer in the display area of the substrate.
13. 13 . The display device of claim 12 , wherein the through hole comprises: a first sub-through hole penetrating the substrate; a second sub-through hole having a diameter larger than that of the first sub-through hole and penetrating the transistor layer, the display element layer, the encapsulation layer, and the polarizing layer; a third sub-through hole having a diameter larger than that of the second sub-through hole and penetrating the substrate cover layer; and a fourth sub-through hole having a diameter larger than that of the third sub-through hole and penetrating the functional layer.
14. 14 . The display device of claim 1 , further comprising: an optical module inserted into the through hole.
15. 15 . A display device comprising: a substrate; a transistor layer on an upper surface of the substrate; a display element layer on the transistor layer; an encapsulation layer on the display element layer; a polarizing layer on the encapsulation layer; a substrate cover layer on a lower surface of the substrate; and a through hole penetrating the substrate cover layer, the substrate, the transistor layer, the display element layer, the encapsulation layer, and the polarizing layer in a display area of the substrate, wherein the substrate cover layer comprises: an upper surface contacting the lower surface of the substrate; a lower surface opposite the upper surface of the substrate cover layer; and an inner surface defining an inner wall of the through hole, and wherein an inclination of the inner surface of the substrate cover layer is different from an inclination of the lower surface of the substrate cover layer.
16. 16 . The display device of claim 15 , wherein the inclination of the inner surface of the substrate cover layer is greater than the inclination of the lower surface of the substrate cover layer.
17. 17 . The display device of claim 15 , wherein the through hole comprises a plurality of sub-through holes having different diameters.
18. 18 . The display device of claim 17 , wherein the through hole comprises: a first sub-through hole penetrating the substrate; a second sub-through hole having a diameter larger than that of the first sub-through hole and penetrating the transistor layer, the display element layer, the encapsulation layer and the polarizing layer; and a third sub-through hole having a diameter larger than that of the second sub-through hole and penetrating the substrate cover layer.
19. 19 . The display device of claim 18 , wherein the second sub-through hole surrounds the first sub-through hole in a plan view.
20. 20 . An electronic device comprising: a display device providing a screen, wherein the display device comprising: a substrate; a transistor layer on an upper surface of the substrate; a display element layer on the transistor layer; an encapsulation layer on the display element layer; a polarizing layer on the encapsulation layer; a substrate cover layer on a lower surface of the substrate; and a through hole penetrating the substrate cover layer, the substrate, the transistor layer, the display element layer, the encapsulation layer, and the polarizing layer in a display area of the substrate, and wherein a thickness of the substrate cover layer is constant throughout an entire area of the substrate cover layer.

Description

CROSS-REFERENCE TO RELATED APPLICATION The present application claims priority to and the benefit of Korean Patent Application No. 10-2024-0154360, filed on Nov. 4, 2024, in the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference. BACKGROUND 1. Field Aspects of some embodiments of the present disclosure relate to a display device. 2. Description of the Related Art In order to provide image information, a variety of types of electronic devices, including display modules, are being used. Such an electronic device may include an electronic module that receives an external signal or provides an output signal to the outside. For example, an electronic module may include a camera module, etc. There is an increasing demand for display devices that can capture high-quality images. The above information disclosed in this Background section is only for enhancement of understanding of the background and therefore the information discussed in this Background section does not necessarily constitute prior art. SUMMARY Aspects of some embodiments of the present disclosure relate to a display device, and for example to a display device that can maintain a constant efficiency of blocking light throughout the entire area of a substrate, and an electronic device including the same. Aspects of some embodiments of the present disclosure include a display device that can maintain a constant efficiency of blocking light throughout the entire area of a substrate, and an electronic device including the same. According to some embodiments of the present disclosure, there is provided a display device including: a substrate; a transistor layer on an upper surface of the substrate; a display element layer on the transistor layer; an encapsulation layer on the display element layer; a polarizing layer on the encapsulation layer; a substrate cover layer on a lower surface of the substrate; and a through hole penetrating the substrate cover layer, the substrate, the transistor layer, the display element layer, the encapsulation layer, and the polarizing layer in a display area of the substrate. According to some embodiments, the thickness of the substrate cover layer may be constant (or substantially constant) throughout an entire area of the substrate cover layer. According to some embodiments of the present disclosure, there is provided a display device including: a substrate; a transistor layer on an upper surface of the substrate; a display element layer on the transistor layer; an encapsulation layer on the display element layer; a polarizing layer on the encapsulation layer; a substrate cover layer on a lower surface of the substrate; and a through hole penetrating the substrate cover layer, the substrate, the transistor layer, the display element layer, the encapsulation layer, and the polarizing layer in a display area of the substrate. According to some embodiments, the substrate cover layer may include: an upper surface in contact with the lower surface of the substrate; a lower surface opposite the upper surface of the substrate cover layer; and an inner surface defining an inner wall of the through hole. According to some embodiments, the inclination of the inner surface of the substrate cover layer may be different from the inclination of the lower surface of the substrate cover layer. According to some embodiments of the present disclosure, there is provided an electronic device including: a display device providing a screen. According to some embodiments, the display device may include a substrate; a transistor layer on an upper surface of the substrate; a display element layer on the transistor layer; an encapsulation layer on the display element layer; a polarizing layer on the encapsulation layer; a substrate cover layer on a lower surface of the substrate; and a through hole penetrating the substrate cover layer, the substrate, the transistor layer, the display element layer, the encapsulation layer, and the polarizing layer in a display area of the substrate. According to some embodiments, the thickness of the substrate cover layer may be constant (or substantially constant) throughout an entire area of the substrate cover layer. According to some embodiments of the present disclosure, it may be possible to achieve a constant efficiency of blocking light throughout the entire substrate of a display device. For example, according to some embodiments, because the thickness of a substrate cover layer is maintained to be uniform (or substantially uniform over the entire area of the substrate cover layer, the efficiency of blocking light can be maintained uniformly throughout the entire area of the substrate. Accordingly, according to some embodiments, the image quality of the display device and electronic device may be relatively improved. The characteristics of embodiments according to the present disclosure are not limited to the above-described characteristics and othe