Electroluminescent display panel, preparation method thereof and display device

An electroluminescent display and panel technology, which is applied in the direction of circuits, electrical components, and electrical solid devices, can solve problems such as the coffee ring effect, achieve the effect of improving the uniformity of film thickness and improving the display effect

Active Publication Date: 2018-08-10
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide an electroluminescence display panel, its preparation method, and a display device to solve the problem of the coffee ring effect caused by solvent removal in the prior art

Method used

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  • Electroluminescent display panel, preparation method thereof and display device
  • Electroluminescent display panel, preparation method thereof and display device
  • Electroluminescent display panel, preparation method thereof and display device

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preparation example Construction

[0029] Embodiments of the present invention provide a method for preparing an electroluminescent display panel, such as figure 1 As shown, the preparation method may include the following steps:

[0030] S101, forming a pattern of an anode in each sub-pixel of the base substrate and forming a pattern of a pixel defining layer between each sub-pixel.

[0031] Specifically, a single patterning process is used to form the patterns of the anodes in the sub-pixels of the base substrate. Wherein, the material of the anode may include a transparent conductive material. Wherein, the transparent conductive material may include one or a combination of indium tin oxide (ITO), indium zinc oxide (IZO), carbon nanotubes, graphene, nano gold and nano silver, which is not limited herein.

[0032] A patterning process is used to form the graphics of the pixel defining layer between the sub-pixels.

[0033] S102. Using an inkjet printing process to spray ink and anti-solvent in each sub-pixe...

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Abstract

The invention discloses an electroluminescent display panel, a preparation method thereof and a display device. The preparation method comprises the steps of forming an anode in each sub-pixel of a substrate and a pixel defining layer between the sub-pixels; spraying ink and an anti-solvent on the anode of each sub-pixel by adopting an ink-jet printing process; performing ultrasonic treatment anddrying treatment on the substrate sprayed with the ink and anti-solvent to form an organic electroluminescent layer; and forming a cathode on the organic electroluminescent layer so as to form an electroluminescent display panel. The anode of each sub-pixel is sprayed with the ink and anti-solvent by adopting the ink-jet printing process, and a solute is separated out according to principles thatthe anti-solvent is mutually dissolved with a solvent and that the solute is not dissolved or slightly dissolved in the anti-solvent. The solute is enabled to be uniformly dispersed through the ultrasonic treatment, and then the solvent and the anti-solvent are removed through the drying treatment, so that the uniformity of the film thickness of the prepared organic electroluminescent layer is enabled to be improved, and a coffee-ring effect of the organic electroluminescent layer is avoided.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an electroluminescence display panel, a preparation method thereof and a display device. Background technique [0002] Organic Light Emitting Diode (OLED) display has the advantages of low energy consumption, self-illumination, wide viewing angle and fast response speed. [0003] At present, the film-forming methods of the organic electroluminescent layer in OLED displays mainly include vapor deposition and inkjet printing. Among them, film formation by inkjet printing is considered to be an important way to achieve mass production of large-size OLED displays due to its fast film formation rate, high material utilization rate, and large-scale realization. Usually, when making an organic electroluminescent layer, it is necessary to pre-fabricate the anode and the pixel defining layer used to define the area where each sub-pixel is located on the substrate, and then use the inkje...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/56H01L27/32
CPCH10K59/30H10K71/135H10K50/11
Inventor 范招康
Owner BOE TECH GRP CO LTD
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