Display substrate and display device

Abstract

The invention provides a display substrate and a display device, belongs to the technical field of display, and can solve the problem of poor packaging effect in the prior art. The display substrate is provided with a display area and a non-display area surrounding the display area, and the display substrate comprises a substrate; an organic light-emitting diode arranged on the substrate and located in the display area; a first isolation column and a second isolation column which are arranged on the substrate, located in the non-display area and surround the display area, wherein the first isolation column is located between the second isolation column and the organic light-emitting diode; a first packaging layer, a second packaging layer and a third packaging layer which are sequentially arranged on the side, away from the substrate, of the organic light-emitting diode, wherein the first packaging layer at least covers the organic light-emitting diode, the second packaging layer at least covers the first packaging layer and the first isolation column, and the third packaging layer at least covers the second packaging layer and the second isolation column; and an expansion elastic layer which is arranged on the substrate and is positioned between the first isolation column and the second isolation column.

Description

technical field [0001] The present disclosure belongs to the field of display technology, and in particular relates to a display substrate and a display device. Background technique [0002] OLED (Organic Light-Emitting Diode: Organic Light-Emitting Device, referred to as OLED) is a light-emitting device that uses organic solid-state semiconductors as light-emitting materials. It has the advantages of wide temperature adaptation range and so on, so it has broad application prospects. [0003] At present, thin film encapsulation is a packaging method widely used in the production of OLED display panels, that is, the OLED light-emitting device is covered with a stacked structure of inorganic encapsulation layer and organic encapsulation layer to achieve the purpose of blocking water and oxygen. Among them, the inorganic encapsulation layer is used for water and oxygen barrier function, and the organic encapsulation layer is used for stress release and planarization. Organic ...

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Problems solved by technology

However, due to the strong fluidity of the low-viscosity organic encapsulation layer material, it is easy to cause the edge of the coating to overflow. In order to prevent the overflow of the organic encapsulation layer material, isolation columns are generally set at the edge, and the height of the isolation columns needs to be higher than that of the organic encapsulation layer. In order to achieve the purpose of complete barrier, however, this will cause a height difference, which will affect the barrier effect of the subsequent inorganic encapsulation layer on water and oxygen

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