Display substrate, manufacturing method thereof, and display device

A technology for display substrates and manufacturing methods, which is applied in the direction of electrical components, electrical solid devices, circuits, etc., can solve the problems of poor uniformity of luminous brightness and poor uniformity of thickness of the luminescent layer, and achieve the effect of improving uniformity

Inactive Publication Date: 2019-06-28
BOE TECH GRP CO LTD
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Problems solved by technology

[0004] However, during the drying process of the luminescent material solution in the pixel area, the luminescent material solution is prone to a "coffee ring effect", resulting in a difference in the thickness of the edge region and the thickness of the central region in the finally formed luminescent layer. The uniformity of the thickness of the layer is poor, resulting in poor uniformity of the luminous brightness of the light-emitting layer

Method used

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

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Embodiment Construction

[0046]In order to make the purpose, technical solution and advantages of the application clearer, the application will be further described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0047] The inkjet printing process is a process in which a solution (also called ink) is printed on a target area (that is, the desired area) through a micron-scale printing nozzle. It has the advantages of simple operation, low cost, simple process, and easy realization of large-size display. With the continuous research and development of high-performance polymer materials and the further improvement of thin-film preparation technology, it is expected to quickly realiz...

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Abstract

The invention discloses a display substrate, a manufacturing method thereof and a display device, and belongs to the technical field of the display. The method comprises a step of forming a flat layeron a base substrate, wherein the flat layer has a protruding structure, a step of forming an anode on the base substrate on which the flat layer is formed, wherein the anode is at least on a side ofthe protruding structure away from the base substrate, a step of forming a pixel defining layer on the base substrate on which the anode is formed, wherein the pixel defining layer comprises a pixel region defined by a retaining wall structure, the orthographic projection of the pixel region on the base substrate covers the orthographic projection of the protruding structure on the base substrate,and an edge region of the pixel region is level with one side of the anode away from the base substrate, and a step of forming a light-emitting layer in the pixel region by an inkjet printing process, wherein the light-emitting layer is connected to the side of the anode away from the base substrate. According to the invention, the problem that the uniformity of the light-emitting luminance of the light-emitting layer is poor is solved, and the uniformity of the light-emitting luminance of the light-emitting layer is improved. The invention is used for manufacturing the display substrate.

Description

technical field [0001] The present application relates to the field of display technology, in particular to a display substrate, a manufacturing method thereof, and a display device. Background technique [0002] Electroluminescent display devices such as polymer light-emitting diodes (English: polymer light-emitting diode; PLED for short) have the advantages of thinness, lightness, low power consumption, high contrast, high color gamut, and flexible display, and are widely used in the display industry. [0003] Electroluminescent display devices mainly rely on electroluminescent display substrates for display. The electroluminescence display substrate usually includes a base substrate and a thin film transistor (English: Thin Film Transistor; abbreviation: TFT) arranged on the base substrate, a flat layer, an anode, and a pixel definition layer (English: Pixel Definition Layer; abbreviation: PDL). ), a luminescent layer and a cathode, the pixel defining layer includes a pi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/32
CPCH10K59/124H10K71/135H10K50/813H10K59/00
Inventor 崔颖
Owner BOE TECH GRP CO LTD
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