US-12622137-B2 - Display device and electronic device having the same

US12622137B2US 12622137 B2US12622137 B2US 12622137B2US-12622137-B2

Abstract

A display device includes a first electrode disposed on a substrate; a pixel defining layer that has an opening exposing the first electrode; a second electrode disposed on the pixel defining layer and the first electrode; an encapsulation layer that covers the second electrode; a color filter disposed on the encapsulation layer; and an upper light blocking layer that has an upper opening corresponding to the color filter, wherein the upper light blocking layer overlaps an overlapping portion where adjacent color filters overlap each other in a plan view.

Inventors

Choong Youl Im
Ha Seok JEON
Hyun Duck CHO
Beohm Rock Choi

Assignees

SAMSUNG DISPLAY CO., LTD.

Dates

Publication Date: 20260505
Application Date: 20230615
Priority Date: 20221111

Claims (20)

1 . A display device comprising: a first electrode disposed on a substrate; a pixel defining layer that has an opening exposing the first electrode; a second electrode disposed on the pixel defining layer and the first electrode; an encapsulation layer that covers the second electrode; a color filter disposed on the encapsulation layer; an upper light blocking layer that has an upper opening corresponding to the color filter; a lower light blocking layer disposed on the encapsulation layer and having a lower opening, wherein the upper light blocking layer overlaps an overlapping portion where adjacent color filters overlap each other in a plan view, a horizontal distance between the pixel defining layer and the upper light blocking layer is in a range of about 6 μm to about 8.5 μm, and the lower opening is filled by a respective one of the color filters.
2 . The display device of claim 1 , wherein a horizontal distance between the lower light blocking layer and the upper light blocking layer is in a range of about 1.7 μm to about 3 μm.
3 . The display device of claim 2 , wherein the lower opening has a smaller area than the upper opening.
4 . The display device of claim 3 , wherein the upper light blocking layer has a thickness in a range of about 1 μm to about 3 μm, and the lower light blocking layer has a thickness of about 1 μm to about 1.5 μm.
5 . The display device of claim 4 , wherein a horizontal distance between the pixel defining layer and the lower light blocking layer is in a range of about 3 μm to about 6.8 μm.
6 . The display device of claim 4 , wherein the lower opening and the upper opening each have a circular shape.
7 . The display device of claim 4 , wherein the upper light blocking layer is formed along the overlapping portion where the adjacent color filters overlap each other in a plan view.
8 . The display device of claim 7 , wherein the upper light blocking layer has a constant width.
9 . A display device comprising: a first electrode disposed on a substrate; a pixel defining layer that has an opening exposing the first electrode; a second electrode disposed on the pixel defining layer and the first electrode; an encapsulation layer that covers the second electrode; a lower light blocking layer disposed on the encapsulation layer and having a lower opening; and a color filter that fills the lower opening, wherein adjacent color filters do not overlap each other in a plan view and are spaced apart at regular intervals, and a horizontal distance between the pixel defining layer and the lower light blocking layer is in a range of about 3 μm to about 6.8 μm.
10 . The display device of claim 9 , wherein portions at which the adjacent color filters spaced apart at the regular intervals overlap the lower light blocking layer in a plan view.
11 . The display device of claim 10 , wherein the lower light blocking layer has a thickness in a range of about 1 μm to about 3 μm.
12 . An electronic device comprising: a housing that has a rear surface and a side surface; a cover window disposed at an upper portion of the housing; and a display panel disposed at a lower portion of the cover window and including a display area, wherein the display panel includes: a first electrode disposed on a substrate; a pixel defining layer that has an opening exposing the first electrode; a second electrode disposed on the pixel defining layer and the first electrode; an encapsulation layer that covers the second electrode; a lower light blocking layer disposed on the encapsulation layer and having a lower opening; a color filter that fills the lower opening; and an upper light blocking layer that has an upper opening corresponding to the color filter, a horizontal distance between the lower light blocking layer and the upper light blocking layer is in a range of about 1.7 μm to about 3 μm.
13 . The electronic device of claim 12 , wherein a horizontal distance between the pixel defining layer and the upper light blocking layer is in a range of about 6 μm to about 8.5 μm, and a horizontal distance between the pixel defining layer and the lower light blocking layer is in a range of about 3 μm to about 6.8 μm.
14 . The electronic device of claim 13 , wherein the lower opening has a smaller area than the upper opening.
15 . The electronic device of claim 14 , wherein the upper light blocking layer has a thickness in a range of about 1 μm to about 3 μm, and the lower light blocking layer has a thickness in a range of about 1 μm to about 1.5 μm.
16 . The electronic device of claim 15 , wherein the lower opening and the upper opening each have a circular shape.
17 . The electronic device of claim 15 , wherein the upper opening is formed along an overlapping portion where adjacent color filters overlap in a plan view.
18 . The electronic device of claim 17 , wherein the upper opening has a constant width.
19 . The electronic device of claim 13 , wherein a polarizer is not disposed on a front surface of the display panel.
20 . The electronic device of claim 13 , wherein the display panel includes: a sensing electrode disposed between the encapsulation layer and the lower light blocking layer and overlapping the lower light blocking layer in a plan view; and a touch sensing layer that includes a sensing insulating layer disposed on at least one side of the sensing electrode.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims priority to and the benefit of Korean Patent Application No. 10-2022-0151009 under 35 U.S.C. § 119, filed in the Korean Intellectual Property Office (KIPO) on Nov. 11, 2022, the entire contents of which are incorporated herein by reference. BACKGROUND 1. Technical Field Embodiments of the disclosure relate to a display device and an electronic device including the same. 2. Description of the Related Art A display device serves to display an image, and includes a liquid crystal display, an organic light emitting diode display, and the like. Such a display device is used in various electronic devices such as mobile phones, navigation units, digital cameras, electronic books, portable game machines, and various terminals. A display device such as an organic light emitting diode display may have a structure in which the display device can be bent or folded using a flexible substrate. An emissive display device is a self-emitting display device and displays an image by emitting light from a light emitting element. On the other hand, the liquid crystal display displays an image by adjusting a degree of blocking light provided by a light unit, and two polarizers are formed on top and bottom as well as on a liquid crystal layer to block light. Accordingly, an emissive display device may generally display an image without including a polarizer unlike a liquid crystal display. The above information disclosed in this Background section is only for enhancement of understanding of the background of the described technology, and therefore, it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art. SUMMARY Embodiments have been made in an effort to reduce undesirable reflection, e.g., a reflection diffraction pattern or reflective diffraction pattern generated in case that external light is reflected. The technical objectives to be achieved by the disclosure are not limited to those described herein, and other technical objectives that are not mentioned herein would be clearly understood by a person skilled in the art from the description of the disclosure. An embodiment of the disclosure provides a display device including a first electrode positioned on a substrate; a pixel defining layer that has an opening exposing the first electrode; a second electrode disposed on the pixel defining layer and the first electrode; an encapsulation layer that covers the second electrode; a color filter disposed on the encapsulation layer; and an upper light blocking layer that has an upper opening corresponding to the color filter, wherein the upper light blocking layer overlaps an overlapping portion where adjacent color filters overlap each other in a plan view, and a horizontal distance between the pixel defining layer and the upper light blocking layer is in a range of about 6 μm to about 8.5 μm. The display device may further include a lower light blocking layer disposed on the encapsulation layer and having a lower opening, the lower opening may be filled by the color filter, and a horizontal distance between the lower light blocking layer and the upper light blocking layer may be in a range of about 1.7 μm to about 3 μm. The lower opening may have a smaller area than the upper opening. The upper light blocking layer may have a thickness in a range of about 1 μm to about 3 μm, and the lower light blocking layer may have a thickness in a range of about 1 μm to about 1.5 μm. A horizontal distance between the pixel defining layer and the lower light blocking layer may be in a range of about 3 μm to about 6.8 μm. The lower opening and the upper opening may each have a circular shape. The upper light blocking layer may be formed along the overlapping portion where the adjacent color filters overlap each other in a plan view. The upper light blocking layer may have a constant width. An embodiment of the disclosure provides a display device including a first electrode positioned on a substrate; a pixel defining layer that has an opening exposing the first electrode; a second electrode disposed on the pixel defining layer and the first electrode; an encapsulation layer that covers the second electrode; a lower light blocking layer disposed on the encapsulation layer and having a lower opening; and a color filter that fills the lower opening, wherein adjacent color filters do not overlap each other in a plan view and are spaced apart at regular intervals, and a horizontal distance between the pixel defining layer and the upper light blocking layer is in a range of about 6 μm to about 8.5 μm. Portions at which the adjacent color filters spaced apart at the regular intervals may overlap the lower light blocking layer in a plan view. The lower light blocking layer may be formed to have a thickness in a range of about 1 μm to about 3 μm. An embodiment provides an electronic device including a housing