KR-20260063123-A - DISPLAY DEVICE

Abstract

A display device according to one embodiment includes a substrate including a display area comprising a plurality of subpixels and a non-display area surrounding the display area; a first electrode disposed for each of the subpixels on the substrate of the display area; and a bank disposed on the first electrode of the display area, located at the boundary between adjacent subpixels, and overlapping with the periphery of the upper surface of the first electrode, wherein the bank comprises a plurality of black particles having different diameters.

Inventors

• 김원래
• 김선우
• 장경국
• 황성한
• 현병관

Assignees

• 엘지디스플레이 주식회사

Dates

Publication Date

20260507

Application Date

20241030

Claims (18)

1. A substrate comprising a display area including a plurality of subpixels and a non-display area surrounding the display area; A first electrode disposed for each of the subpixels on the substrate of the above display area; and It includes a bank disposed on the first electrode of the above-mentioned display area and overlapping with the periphery of the upper surface of the first electrode, The above bank is a display device comprising a plurality of black series particles having different diameters.
2. In Article 1, A display device in which the scattering rate of the above-mentioned plurality of black particles increases as the wavelength of the incident light decreases.
3. In Article 1, The above plurality of black-based particles are a display device having a diameter of 1000 nm or less.
4. In Article 1, A display device comprising a plurality of black particles, the above-mentioned particles including a first particle of a first diameter, a second particle of a second diameter smaller than the first diameter, and a third particle of a third diameter smaller than the second diameter.
5. In Paragraph 4, A display device in which the scattering rate of the first particle for red light, the scattering rate of the second particle for green light, and the scattering rate of the third particle for blue light are the same as each other.
6. In Article 1, The above-mentioned black particles are a display device containing black pigment or black dye.
7. In Article 1, A display device comprising a plurality of subpixels including a first subpixel, a second subpixel, and a third subpixel, further comprising the first electrode and an organic layer on the bank, wherein the organic layer is disposed across the first subpixel to the third subpixel.
8. In Article 7, The above organic layer is a display device comprising a first light-emitting layer on the first subpixel, a second light-emitting layer on the second subpixel, and a third light-emitting layer on the third subpixel.
9. In Article 8, A display device in which, in each of the above subpixels, the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer are each stacked in quantities of two or more.
10. In Article 7, A display device further comprising a second electrode on the organic layer, a color filter on the second electrode, and a black matrix located at the boundary between adjacent subpixels between the second electrode and the color filter, wherein the width of the black matrix is smaller than the width of the bank.
11. In Article 10, A display device in which the end of the black matrix is closer to the boundary between the subpixels adjacent to the end of the bank.
12. In Article 10, A display device further comprising a touch portion between the second electrode and the color filter, wherein the touch portion includes a bridge electrode and a sensor electrode on the bridge electrode, and the black matrix overlaps the bridge electrode and the sensor electrode.
13. In Article 1, A display device further comprising a first transistor between the substrate and the first electrode, and a second transistor between the first transistor and the first electrode, wherein the semiconductor layer of the first transistor comprises polysilicon and the semiconductor layer of the second transistor comprises oxide.
14. A substrate including a display area and a non-display area surrounding the display area; A first electrode on the substrate of the above-mentioned display area; and It includes a bank disposed on the first electrode of the above-mentioned display area and overlapping with the periphery of the upper surface of the first electrode, The above bank includes a plurality of black-based particles, and The above bank is a display device in which the plurality of black particles have a plurality of diameters to form the scattering rate for red light, the scattering rate for green light, and the scattering rate for blue light at the same level.
15. In Article 14, A display device in which the scattering rate of the above-mentioned plurality of black particles increases as the wavelength of the incident light decreases.
16. In Paragraph 4, The above plurality of black-based particles are a display device having a diameter of 1000 nm or less.
17. In Article 14, The above plurality of black-based particles are a display device having at least three diameters.
18. In Article 14, The above-mentioned black particles are a display device containing black pigment or black dye.

Description

Display Device This specification relates to a display device. As the information society develops, there is an increasing demand for display devices that display images, and various types of display devices, such as Liquid Crystal Displays and Organic Light Emitting Diode Displays, are being utilized. The display device includes a plurality of pixels and is equipped with a plurality of switching elements to drive and control the pixels. FIG. 1 is a plan view of a display device according to one embodiment. FIG. 2 is a cross-sectional view showing the bent state of the display panel according to FIG. 1. Figure 3 is a cross-sectional view taken along the line AA' of Figure 1. Figure 4 is a detailed cross-sectional view of the light-emitting part of Figure 3. FIG. 5 is a detailed cross-sectional view of the light-emitting part according to a modified example. Figure 6 is a cross-sectional view of the touch portion according to Figure 3. Figure 7 is an enlarged cross-sectional view of the Q1 region of Figure 3. Figure 8 is a diagram showing the scattering tendency of particles of different diameters for light. Figure 9 is a graph showing the scattering rate of particles of different diameters according to wavelength. Figure 10 is a diagram showing the scattering of light of different wavelengths by the first particle, the second particle, and the third particle. FIG. 11 is a cross-sectional view of a display device according to another embodiment. FIG. 12 is a cross-sectional view of a display device according to another embodiment. FIG. 13 is a perspective view of a display device according to another embodiment. Figure 14 is a cross-sectional view taken along the BB' line of Figure 13. Hereinafter, embodiments will be described with reference to the drawings. Identical reference numerals denote identical components. Additionally, in the drawings, the thickness, proportion, and dimensions of components may be exaggerated to effectively illustrate the technical content. The scale of the components depicted in the drawings differs from the actual scale for the convenience of explanation and is therefore not limited to the scale depicted in the drawings. In this specification, where it is stated that any component (or region, layer, part, etc.) is "on," "connected," or "joined" to another component, it means that it may be directly connected/joined to the other component or that a third component may be placed between them. "And/or" includes all one or more combinations that the associated configurations can define. Terms such as "first," "second," etc., may be used to describe various components, but said components are not 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 present embodiments, the first component may be named the second component, and similarly, the second component may be named the first component. A singular expression includes a plural expression unless the context clearly indicates otherwise. Terms such as "below," "lower," "above," and "upper" are used to describe the relationships between components depicted in the drawings. These terms are relative concepts and are described based on the directions indicated in the drawings. For example, unless "immediately" or "directly" is used, one or more other parts may be located between two parts. Spatially relative terms such as "below" or "beneath," "lower," "above," and "upper" may be used to easily describe the correlation between one element or component and another element or component as depicted in the drawings. Spatially relative terms should be understood as terms that include different directions of the element during use or operation in addition to the directions depicted in the drawings. For example, if an element depicted in the drawings is flipped, an element described as "below" or "beneath" another element may be placed "above" of that other element. Therefore, the exemplary term "below" can include both the downward and upward directions. Terms such as "include" or "have" are intended to indicate 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. The features of each of the various embodiments of this specification may be combined or combined with one another, either partially or wholly, and may technically enable various interlocking and operation. Each embodiment may be implemented independently of one another or may be implemented together in an associated relationship. The display device of this specification is described below through the attached drawings and embodiments. FIG. 1 is a plan view of a display device according to one embodiment. Referring to FIG. 1, a d