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Display substrate, preparation method thereof and display device

A technology for display substrates and base substrates, applied in semiconductor/solid-state device manufacturing, electrical components, electric solid-state devices, etc., can solve problems such as increasing the uniformity of light emission of display devices, pixel ink climbing, etc., to avoid film formation failures Uniformity and the effect of preventing electrode breakage

Pending Publication Date: 2020-07-03
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the embodiments of the present invention is to provide a display substrate and its preparation method, and a display device, so as to solve the problem of pixel ink climbing in the opening area of ​​the limiting layer, thereby increasing the uniformity of light emission of the display device

Method used

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  • Display substrate, preparation method thereof and display device
  • Display substrate, preparation method thereof and display device
  • Display substrate, preparation method thereof and display device

Examples

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no. 1 example

[0039] image 3 A schematic diagram showing the structure of the substrate according to the first embodiment of the present invention; Figure 4 for image 3 The cross-sectional view of C-C direction in the middle; Figure 5 for image 3 A cross-sectional view in the direction of A-A. Such as image 3 , Figure 4 and Figure 5 As shown, the display substrate of the embodiment of the present invention is an organic light emitting diode display panel, including a base substrate 10 and a pixel defining layer formed on the base substrate 10. The pixel defining layer includes pixels corresponding to the sub-pixel regions of the display substrate. An open area 12 and a dam 11 delimiting the open area 12 . The embankment 11 includes a first side portion 111 extending along the first direction of the base substrate 10 and a second side portion 112 extending along the second direction of the base substrate 10, the height of the first side portion 111 is lower than that of the se...

no. 2 example

[0051] Based on the technical idea of ​​the foregoing embodiments, such as Figure 7 As shown, this embodiment provides a method for preparing a display substrate, including:

[0052] S1. Forming a first pixel defining material layer on the base substrate;

[0053] S2. Form the first pixel defining material layer into an opening area corresponding to the sub-pixel area of ​​the display substrate and a bank defining the opening area. Wherein, the dam includes a first side portion extending along a first direction of the base substrate and a second side portion extending along a second direction of the base substrate, and the height of the first side portion is lower than the height of the second edge.

[0054] Wherein, after step S2, the method for preparing the substrate shown in this embodiment further includes:

[0055] forming a second pixel defining material layer over the base substrate;

[0056] The second pixel defining material layer forms a corner portion connecti...

no. 3 example

[0066] An embodiment of the present invention also provides a display device, including the aforementioned display substrate. The display device can be any product or component with a display function such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, and the like.

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Abstract

The embodiment of the invention provides a display substrate, a preparation method thereof and a display device. The display substrate comprises a substrate body and a pixel defining layer formed on the substrate body. The pixel defining layer comprises an opening area corresponding to a sub-pixel area of the display substrate and a dam for limiting the opening area; the dam comprises a first edgeportion extending in the first direction of the substrate and a second edge portion extending in the second direction of the substrate. the height of the first edge portion is lower than that of thesecond edge portion, and the printing ink in the adjacent opening areas on the two sides of the first edge portion is uniformly spread at the first edge portion; the problem that pixel ink climbs in an opening area of a limiting layer is solved, and therefore the light-emitting uniformity of the display device is improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a display substrate, a preparation method thereof, and a display device. Background technique [0002] Compared with Liquid Crystal Display (LCD), Organic Light-Emitting Diode (OLED) has the advantages of self-luminescence, fast response, wide viewing angle, high brightness, bright color, light and thin, etc., and is considered to be the next generation display technology. . [0003] OLED film-forming methods mainly include evaporation process or solution process. The evaporation process is relatively mature in small-scale applications. At present, this technology has been applied in mass production, but the technical materials are expensive and the material utilization rate is low, which increases the cost of product development. The solution process OLED film-forming methods mainly include inkjet printing, nozzle coating, spin coating, screen printing, etc. Among them, inkje...

Claims

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Application Information

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IPC IPC(8): H01L27/32H01L51/56
CPCH10K59/122H10K71/00
Inventor 胡春静侯文军
Owner BOE TECH GRP CO LTD