KR-102962640-B1 - PIXEL AND DISPLAY DEVICE HAVING THE SAME

KR102962640B1KR 102962640 B1KR102962640 B1KR 102962640B1KR-102962640-B1

Abstract

A pixel according to an embodiment of the present invention may include a first subpixel, a second subpixel, and a third subpixel, each arranged along a first direction and including a light-emitting region and a non-light-emitting region, respectively. Each of the first, second, and third subpixels may include: a first alignment electrode extending in the first direction; a second alignment electrode extending in the first direction and spaced apart from the first alignment electrode in a second direction intersecting the first direction; a light-emitting element disposed between the first alignment electrode and the second alignment electrode; and a first electrode and a second electrode electrically connected to the light-emitting element and spaced apart from each other in the second direction. Here, the light-emitting element may have a first end and a second end facing each other in the second direction. The first electrode may overlap with the first end of the light-emitting element, and the second electrode may overlap with the second end of the light-emitting element.

Inventors

신동희
손선권
차나현

Assignees

삼성디스플레이 주식회사

Dates

Publication Date: 20260511
Application Date: 20220314

Claims (20)

A substrate including a display area and a non-display area; and Provided in the above display area, comprising at least one pixel including a first subpixel, a second subpixel, and a third subpixel arranged along a first direction, each including a light-emitting area and a non-light-emitting area, and Each of the above first subpixel, the above second subpixel, and the above third subpixel is, A pixel circuit layer provided on the substrate and comprising at least one transistor and a data line electrically connected to the transistor and receiving a data signal; and It includes a display element layer comprising a light-emitting element provided on the pixel circuit layer and electrically connected to the transistor, and The above-mentioned display element layer is, A first alignment electrode extended in the first direction above; A second alignment electrode extending in the first direction and spaced apart from the first alignment electrode in a second direction different from the first direction; A light-emitting element disposed between the first alignment electrode and the second alignment electrode and extending in a longitudinal direction parallel to the second direction; and It includes a first electrode and a second electrode that are electrically connected to the light-emitting element and spaced apart from each other in the second direction, The light-emitting element includes a first end and a second end formed at both ends based on the length direction, and the length direction is the same as the direction in which the data line extends. The first electrode overlaps with the first end of the light-emitting element and is electrically connected to the first end of the light-emitting element, A display device in which the second electrode overlaps with the second end of the light-emitting element and is electrically connected to the second end of the light-emitting element.
In Article 1, The first electrode of each of the first subpixel, the second subpixel, and the third subpixel is spaced apart from the first electrode of an adjacent subpixel in the first direction, and A display device in which the second electrode of each of the first subpixel, the second subpixel, and the third subpixel is connected to the second electrode of an adjacent subpixel in the first direction.
In Article 2, A display device in which the second electrode of the first subpixel, the second electrode of the second subpixel, and the second electrode of the third subpixel are provided integrally.
In Article 2, A first bank comprising a first opening located in the non-luminous region of each of the first, second, and third subpixels, corresponding to the luminous region of each of the first, second, and third subpixels, and a second opening spaced apart from the first opening; A first connecting wire extending in the second direction from the non-luminescent region of the first subpixel and connected to the first alignment electrode; and A display device further comprising a second connecting wire extending in the second direction from the non-luminous region of the third subpixel and connected to the second alignment electrode.
In Paragraph 4, The first alignment electrode of the first subpixel, the first alignment electrode of the second subpixel, and the first alignment electrode of the third subpixel are connected to each other. A display device in which the second alignment electrode of the first subpixel, the second alignment electrode of the second subpixel, and the second alignment electrode of the third subpixel are connected to each other.
In Article 5, A first bridge pattern located in the non-luminous region of the first subpixel and electrically connected to the second electrode of the first subpixel; A second bridge pattern located in the non-luminescent region of the second subpixel and electrically connected to the second electrode of the second subpixel; and It further includes a third bridge pattern located in the non-luminous region of the third subpixel and electrically connected to the second electrode of the third subpixel, A display device in which the first bridge pattern, the second bridge pattern, and the third bridge pattern are spaced apart from each other.
In Article 6, A display device in which the above third bridge pattern is provided integrally with the above second connecting wiring.
In Article 7, A display device comprising the first alignment electrode, the second alignment electrode, the first bridge pattern, the second bridge pattern, the third bridge pattern, the first connecting wire, and the second connecting wire, provided on the same layer and comprising the same material.
In Article 8, The pixel circuit layer of each of the first subpixel, the second subpixel, and the third subpixel is, A storage capacitor located on the substrate and electrically connected to the first end of the light-emitting element; A first power wiring located on the substrate and electrically connected to the transistor, receiving the voltage of a first driving power supply; A second power wiring located on the substrate and electrically connected to the second end of the light-emitting element and supplied with the voltage of a second driving power source; and The apparatus further comprises a passivation layer located on the transistor, the first power line, and the second power line, and exposing a portion of the storage capacitor, a portion of the first power line, and a portion of the second power line, respectively. The above transistor is electrically connected to the above storage capacitor, and A display device in which the above data line extends in a direction perpendicular to the extension direction of the first and second alignment electrodes.
In Article 9, The second power wiring exposed in the first subpixel is electrically connected to the first bridge pattern, and The second power wiring exposed in the second subpixel is electrically connected to the second bridge pattern, and A display device in which the second power wiring exposed at the third subpixel is electrically connected to the third bridge pattern.
In Article 6, The first alignment electrode comprises a first-1 alignment electrode, a first-2 alignment electrode, a first-3 alignment electrode, a first-4 alignment electrode, and a first-5 alignment electrode, each of which extends in the first direction and is spaced apart in the second direction. The second alignment electrode comprises a second-1 alignment electrode, a second-2 alignment electrode, a second-3 alignment electrode, a second-4 alignment electrode, and a second-5 alignment electrode, each of which extends in the first direction and is spaced apart in the second direction. A display device in which the first alignment electrode and the second alignment electrode are alternately arranged along the second direction.
In Article 11, A display device in which the first electrode of each of the first subpixel, the second subpixel, and the third subpixel overlaps with the second-1 alignment electrode, and the second electrode of the corresponding subpixel overlaps with the first-5 alignment electrode.
In Article 12, Each of the above first subpixel, the above second subpixel, and the above third subpixel is, A first intermediate electrode spaced apart from the first and second electrodes in the second direction between the first electrode and the second electrode, and overlapping with the first-1 alignment electrode and the second-2 alignment electrode; A second intermediate electrode spaced apart from the first intermediate electrode and the second electrode in the second direction between the first intermediate electrode and the second electrode, and overlapping with the first-2 alignment electrode and the second-3 alignment electrode; A third intermediate electrode spaced apart from the second intermediate electrode and the second electrode in the second direction between the second intermediate electrode and the second electrode, and overlapping with the first-third alignment electrode and the second-fourth alignment electrode; and A display device further comprising a fourth intermediate electrode that is spaced apart from the third intermediate electrode and the second electrode in the second direction between the third intermediate electrode and the second electrode, and overlaps with the first-fourth alignment electrode and the second-fifth alignment electrode.
In Article 13, A display device arranged in the order of the first electrode, the first intermediate electrode, the second intermediate electrode, the third intermediate electrode, the fourth intermediate electrode, and the second electrode along the second direction relative to the first electrode of the corresponding subpixel in the light-emitting region of each of the first subpixel, the second subpixel, and the third subpixel.
In Article 14, The first electrode, the second intermediate electrode, and the fourth intermediate electrode are provided on the same layer and contain the same material. A display device wherein the second electrode, the first intermediate electrode, and the third intermediate electrode are provided on the same layer and comprise the same material.
In Article 14, A display device comprising the first electrode, the first intermediate electrode, the second intermediate electrode, the third intermediate electrode, the fourth intermediate electrode, and the second electrode, wherein the first electrode, the first intermediate electrode, the second intermediate electrode, and the second electrode are provided on the same layer and contain the same material.
In Article 14, The light-emitting elements of each of the first subpixel, the second subpixel, and the third subpixel are, A first light-emitting element positioned between the second-1 alignment electrode and the first-1 alignment electrode, comprising a first end electrically connected to the first electrode and a second end electrically connected to the first intermediate electrode; A second light-emitting element positioned between the second-2 alignment electrode and the first-2 alignment electrode, comprising a first end electrically connected to the first intermediate electrode and a second end electrically connected to the second intermediate electrode; A third light-emitting element positioned between the second-third alignment electrode and the first-third alignment electrode, comprising a first end electrically connected to the second intermediate electrode and a second end electrically connected to the third intermediate electrode; A fourth light-emitting element positioned between the second-fourth alignment electrodes and the first-fourth alignment electrodes, comprising a first end electrically connected to the third intermediate electrode and a second end electrically connected to the fourth intermediate electrode; and A display device comprising a fifth light-emitting element positioned between the second-fifth alignment electrodes and the first-fifth alignment electrodes, and including a first end electrically connected to the fourth intermediate electrode and a second end electrically connected to the second electrode.
In Article 17, Each of the first to fifth light-emitting elements comprises a first semiconductor layer, an active layer, and a second semiconductor layer, and The first semiconductor layer comprises an n-type semiconductor layer doped with an n-type dopant, and the second semiconductor layer comprises a p-type semiconductor layer doped with a p-type dopant. A display device in which the second semiconductor layer of each of the first to fifth light-emitting elements is located at the first end of the light-emitting element, and the first semiconductor layer of each of the first to fifth light-emitting elements is located at the second end of the light-emitting element.
In Article 17, Each of the above first subpixel, the above second subpixel, and the above third subpixel is, A second bank located on the first bank in the above non-luminous region; A color conversion layer located above the first to fifth light-emitting elements in the light-emitting region and converting light of a first color emitted from the first to fifth light-emitting elements into light of a second color; and A display device further comprising a color filter located on the color conversion layer and selectively transmitting the light of the second color.
A first subpixel, a second subpixel, and a third subpixel arranged along a first direction, each including a light-emitting region and a non-light-emitting region; comprising, Each of the first subpixel, the second subpixel, and the third subpixel includes a light-emitting region that extends along the first direction and a long side that extends along the second direction different from the first direction. Each of the above first subpixel, the above second subpixel, and the above third subpixel is, A first alignment electrode extended in the first direction above; A second alignment electrode extending in the first direction and spaced apart from the first alignment electrode in the second direction; A light-emitting element disposed between the first alignment electrode and the second alignment electrode; and It includes a first electrode and a second electrode that are electrically connected to the light-emitting element and are spaced apart from each other in the second direction in which the long side extends, and The light-emitting element includes a first end and a second end facing each other in the second direction, and The first electrode is electrically connected to the first end of the light-emitting element, and the second electrode is electrically connected to the second end of the light-emitting element. The above-described light-emitting element comprises a plurality of light-emitting elements that each overlap with the first electrode when viewed on a plane, and the plurality of light-emitting elements are arranged along the first direction in which the short side extends, forming a pixel.

Description

Pixel and display device having the same The present invention relates to a pixel and a display device including the same. With the recent rise in interest in information displays, research and development on display devices is continuously being carried out. Prior art document 1 (U.S. Patent Application Publication US2019/0326348 (published Oct. 24, 2019)) relates to a display device and a method for manufacturing the same. Prior art document 2 (Korean Published Patent Application No. 10-2020-0037911 (published on April 10, 2020)) relates to a display device and a method for manufacturing the same. FIG. 1 is a perspective view schematically illustrating a light-emitting element according to an embodiment. Figure 2 is a schematic cross-sectional view of the light-emitting element of Figure 1. FIG. 3 is a schematic plan view illustrating a display device according to an embodiment. FIG. 4 is a schematic circuit diagram showing the electrical connection relationships of the components included in each of the first to third subpixels shown in FIG. 3 according to an embodiment. FIG. 5 is a schematic plan view illustrating the pixel circuit layer of the pixel shown in FIG. 3. Figure 6 is a schematic cross-sectional view along lines I to I' of Figure 5. FIG. 7 is a plan view schematically illustrating a pixel region including a display element layer of the pixel illustrated in FIG. 3. FIG. 8 is a plan view schematically illustrating only the first and second alignment electrodes and light-emitting elements included in the pixel of FIG. 7. FIG. 9 is a schematic plan view showing the flow of driving current flowing through the light-emitting part of the pixel illustrated in FIG. 7. FIGS. 10 to 12 are schematic cross-sectional views along lines II to II' of FIG. 7. FIG. 13 is a schematic cross-sectional view along lines III to III' of FIG. 7. FIG. 14a is a schematic plan view showing a first mask forming a first electrode, a second intermediate electrode, and a fourth intermediate electrode in a pixel according to an embodiment. FIG. 14b is a schematic plan view showing a second mask forming a first intermediate electrode, a third intermediate electrode, and a second electrode in a pixel according to an embodiment. FIG. 15 is a plan view schematically illustrating a pixel area including an optical layer of the pixel illustrated in FIG. 3. FIGS. 16 to 18 are schematic cross-sectional views along lines IV to IV' of FIG. 15. The present invention is capable of various modifications and may take various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the invention to the specific disclosed forms, and it should be understood that the invention includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention. In describing each drawing, similar reference numerals have been used for similar components. In the attached drawings, the dimensions of the structures are depicted enlarged from their actual size for clarity of the invention. Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the invention, the first component may be named the second component, and similarly, the second component may be named the first component. In this application, terms such as "comprising" or "having" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Furthermore, when a part such as a layer, film, region, or plate is described as being "on" another part, this includes not only cases where it is "immediately above" another part, but also cases where there is another part in between. Additionally, in this specification, when a part such as a layer, film, region, or plate is described as being formed "on" another part, the direction in which it is formed is not limited to the upward direction only, but includes cases where it is formed in the lateral or downward direction. Conversely, when a part such as a layer, film, region, or plate is described as being "below" another part, this includes not only cases where it is "immediately below" another part, but also cases where there is another part in between. In the present application, when it is stated that "a certain component (e.g., 'first component') is (operationally or communicatively) coupled with/to" or "connected to" another component (e.g., 'second component'), it should be understood that the said certain component may be directly connected to the said other