KR-20260063743-A - TOUCH DISPLAY DEVICE

KR20260063743AKR 20260063743 AKR20260063743 AKR 20260063743AKR-20260063743-A

Abstract

A touch display device according to embodiments of the present disclosure comprises a substrate including a display area and a non-display area surrounding the outer edge of the display area, a pixel electrode disposed on the substrate, a common electrode disposed on the pixel electrode, a first inorganic encapsulation layer disposed on the common electrode, an organic encapsulation layer disposed on the first inorganic encapsulation layer, a second inorganic encapsulation layer disposed on the organic encapsulation layer, and a touch sensor disposed on the second inorganic encapsulation layer, wherein the dielectric constant of the first inorganic encapsulation layer is smaller than the dielectric constant of the second inorganic encapsulation layer, and the dielectric constant of the organic encapsulation layer may be smaller than the dielectric constant of the first inorganic encapsulation layer.

Inventors

이진숙
오민호

Assignees

엘지디스플레이 주식회사

Dates

Publication Date: 20260507
Application Date: 20241031

Claims (18)

A substrate comprising a display area and a non-display area surrounding the outer edge of the display area; Pixel electrodes disposed on the above substrate; A common electrode disposed on the pixel electrode above; A first inorganic encapsulation layer disposed on the above common electrode; An organic encapsulation layer disposed on the first inorganic encapsulation layer; A second inorganic encapsulation layer disposed on the above organic encapsulation layer; and It includes a plurality of touch sensors disposed on the second inorganic encapsulation layer, and The dielectric constant of the first inorganic encapsulation layer is smaller than the dielectric constant of the second inorganic encapsulation layer, and A touch display device in which the dielectric constant of the organic encapsulation layer is smaller than the dielectric constant of the first inorganic encapsulation layer.
In paragraph 1, It further includes the pixel electrode and a bank disposed between the pixel electrode and another pixel electrode adjacent to it, A touch display device in which the thickness of the organic encapsulation layer overlapping the plurality of touch sensors is smaller than the thickness of the organic encapsulation layer not overlapping the bank.
In paragraph 1, A touch display device comprising a plurality of inorganic layers having different dielectric constants, wherein the first inorganic encapsulation layer comprises a plurality of inorganic layers.
In paragraph 3, A touch display device having a dielectric constant that is larger the inorganic layer among the plurality of inorganic layers that is closer to the substrate.
In paragraph 3, The dielectric constant of the inorganic layer closest to the substrate among the plurality of inorganic layers is less than or equal to the dielectric constant of the second inorganic encapsulation layer, and A touch display device in which the dielectric constant of the inorganic layer furthest from the substrate among the plurality of inorganic layers is greater than the dielectric constant of the organic encapsulation layer.
In paragraph 1, The above-mentioned first inorganic encapsulation layer is, A first inorganic layer having a first dielectric constant; A second inorganic layer disposed on the first inorganic layer and having a second dielectric constant smaller than the first dielectric constant; A third inorganic layer disposed on the second inorganic layer and having a third dielectric constant smaller than the second dielectric constant; and A touch display device comprising a fourth inorganic layer disposed on the third inorganic layer and having a fourth dielectric constant smaller than the third dielectric constant.
In paragraph 6, A touch display device in which the second dielectric constant is the geometric mean of the first dielectric constant and the third dielectric constant.
In paragraph 6, The above organic encapsulation layer has a fifth dielectric constant smaller than the fourth dielectric constant, and A touch display device in which the difference between the fourth dielectric constant and the fifth dielectric constant is 1.0 or greater.
In paragraph 6, A touch display device having a sixth dielectric constant greater than or equal to the first dielectric constant, the second inorganic encapsulation layer.
In paragraph 6, A touch display device comprising the same inorganic material having different physical properties from each other, wherein the second inorganic layer and the third inorganic layer are
In paragraph 6, A touch display device comprising the same inorganic material having different physical properties, wherein the first inorganic layer and the second inorganic encapsulation layer.
In paragraph 6, It further includes a first dam located near the edge of the second sealing layer, and A touch display device in which the first to fourth inorganic layers and the second inorganic encapsulation layer extend from the display area along the upper part of the first dam to the outer edge of the first dam.
In paragraph 6, It further includes an inner dam that overlaps with the second bag layer above, and A touch display device in which the first to fourth inorganic layers extend from the display area along the upper part of the inner dam to the outer edge of the inner dam.
In paragraph 1, It further includes a light-emitting part disposed between the pixel electrode and the common electrode, and A touch display device in which the region with the thickest thickness of the organic encapsulation layer in the above display area overlaps with a part of the light-emitting part.
A substrate comprising a display area and a non-display area surrounding the outer edge of the display area; Pixel electrodes disposed on the above substrate; A common electrode disposed on the pixel electrode above; A sealing layer disposed on the above common electrode; and It includes a plurality of touch sensors disposed on the above-mentioned packaging layer, and The above-mentioned bag layer is, A first inorganic encapsulation layer comprising a plurality of inorganic layers; An organic encapsulation layer disposed on the first inorganic encapsulation layer; A second inorganic encapsulation layer disposed on the above organic encapsulation layer; comprising A touch display device having a dielectric constant that is smaller the inorganic layer among the plurality of inorganic layers that is closer to the touch sensor.
In paragraph 15, A touch display device in which the second inorganic encapsulation layer has the largest dielectric constant within the encapsulation layer.
In paragraph 15, The first inorganic encapsulation layer includes the first inorganic layer among the plurality of inorganic layers that has the smallest separation distance from the substrate, and A touch display device in which the dielectric constant of the first inorganic layer is less than or equal to the dielectric constant of the second inorganic encapsulation layer.
In paragraph 15, The above-mentioned first inorganic encapsulation layer is, A first inorganic layer having a first dielectric constant; A second inorganic layer disposed on the first inorganic layer and having a second dielectric constant smaller than the first dielectric constant; A third inorganic layer disposed on the second inorganic layer and having a third dielectric constant smaller than the second dielectric constant; and A touch display device comprising a fourth inorganic layer disposed on the third inorganic layer and having a fourth dielectric constant smaller than the third dielectric constant.

Description

Touch Display Device The embodiments of the present disclosure relate to a touch display device. Nowadays, among display devices, there are touch display devices that offer a touch-based input method, moving away from conventional input methods such as buttons, keyboards, and mice, and enabling users to easily and intuitively input information or commands. A touch display device may include a plurality of touch electrodes for touch sensing and a plurality of touch routing wires for connecting the plurality of touch electrodes to a pad portion. A plurality of touch metals for constituting the plurality of touch electrodes and the plurality of touch routing wires may be disposed on an encapsulation layer for protecting an organic-based light-emitting element within a display panel from physical shock, oxygen, and/or moisture. FIG. 1 shows a touch display device according to embodiments of the present disclosure. FIG. 2 shows a display panel according to embodiments of the present disclosure. FIG. 3 is a cross-sectional view of a display panel according to embodiments of the present disclosure. FIG. 4 is a cross-sectional view showing a portion of the display area in a display panel according to embodiments of the present disclosure. FIG. 5 is a cross-sectional view showing the detailed configuration of the encapsulation layer in a display panel according to embodiments of the present disclosure. FIG. 6 is a cross-sectional view showing a portion of the display area in a display panel according to embodiments of the present disclosure. FIG. 7 is a display touch noise simulation result according to an embodiment and a comparative example of the present disclosure. FIG. 8 is a cross-sectional view showing a portion of a non-display area in a display panel according to embodiments of the present disclosure. Hereinafter, some embodiments of the present disclosure will be described in detail with reference to the exemplary drawings. In assigning reference numerals to the components of each drawing, the same components may have the same reference numeral as much as possible, even if they are shown in different drawings. Furthermore, in describing the present disclosure, if it is determined that a detailed description of related known components or functions may obscure the essence of the present disclosure, such detailed description may be omitted. Where terms such as "comprising," "having," or "consisting of" are used in this specification, other parts may be added unless "only" is used. Where a component is expressed in the singular, it may include a plural unless there is a special explicit description otherwise. Additionally, terms such as first, second, A, B, (a), (b), etc., may be used to describe the components of the present disclosure. These terms are used merely to distinguish the components from other components, and the nature, order, sequence, or number of the components are not limited by such terms. In describing the positional relationship of components, where it is stated that two or more components are "connected," "combined," or "joined," it should be understood that while the two or more components may be directly "connected," "combined," or "joined," they may also be "connected," "combined," or "joined" with other components "intervened." Here, the other components may be included in one or more of the two or more components that are "connected," "combined," or "joined" with one another. In describing the temporal flow relationship regarding components, methods of operation, or methods of production, for example, when the temporal or sequential relationship is described using "after," "following," "next," or "before," it may include cases where the relationship is not continuous unless "immediately" or "directly" is used. Meanwhile, where numerical values or corresponding information regarding a component (e.g., levels, etc.) are mentioned, even without separate explicit notation, the numerical values or corresponding information may be interpreted as including a range of error that may occur due to various factors (e.g., process factors, internal or external shocks, noise, etc.). Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the attached drawings. FIG. 1 is a system configuration diagram of a touch display device (100) according to embodiments of the present disclosure. Referring to FIG. 1, a touch display device (100) according to embodiments of the present disclosure may include a display panel (110) and a display driving circuit as components for displaying an image. The display driving circuit may be a circuit for driving the display panel (110). The display driving circuit may include a data driving circuit (120), a gate driving circuit (130), and a controller (140), but embodiments of the present disclosure are not limited thereto. The display panel (110) may include a substrate (111) and a plurality of subpixels (SP) disposed on