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Display substrate and preparation method thereof, and display device

A technology for display substrates and substrate substrates, which is applied in semiconductor/solid-state device manufacturing, semiconductor devices, electrical components, etc. It can solve problems such as large functional film thickness, fast solvent evaporation rate, and uneven film thickness of pixel ink. Achieve the effect of improving resolution and uniform thickness

Active Publication Date: 2022-07-08
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The formation of the pixel film includes the process of droplet falling, spreading, and drying. During the heating and evaporation process after the droplet falls to the pixel area, the saturated vapor pressure of the pixel ink near the edge of the pixel defining layer is small, resulting in The solvent evaporation rate of the pixel ink is fast, and finally the solutes continue to accumulate at the edge of the pixel boundary layer, resulting in a coffee ring effect in which the thickness of the functional film layer in the peripheral part of the sub-pixel area is large, and the thickness of the functional film layer in the middle part is small. The film thickness of the pixel ink is uneven, which has a great impact on the life and display effect of the display device

Method used

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

Examples

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no. 1 example

[0034] figure 2 It is a cross-sectional view of the pixel ink in the display substrate after film formation according to the embodiment of the present invention. like figure 2 As shown, the display substrate of the embodiment of the present invention includes a base substrate 10, a pixel defining layer 11 is disposed on the base substrate 10, a pixel region 12 for accommodating pixel ink is formed between the pixel defining layers 11, and a space between the pixel defining layers 11 is formed. A light-to-heat conversion layer 14 for converting light energy into heat energy is provided thereon.

[0035] like figure 2 As shown, the display substrate in this embodiment drops pixel ink in the pixel area 12, then heats the pixel ink in the pixel area 12, and at the same time, irradiates the light-to-heat conversion layer 14 on the pixel defining layer 11 with light, The light-to-heat conversion layer 14 converts the light energy irradiated on it into heat energy, and uses the...

no. 2 example

[0042] Figure 4 This is a schematic diagram showing the structure of core-shell nanoparticles in a substrate according to an embodiment of the present invention. like Figure 4 As shown, this embodiment is an extension of the aforementioned first embodiment. This embodiment shows that the material of the light-to-heat conversion layer in the substrate includes core-shell nanoparticles 15, and the core-shell nanoparticles 15 includes a light-to-heat conversion material core 151 and A shell 152 of hydrophobic material wrapped on the outer surface of the inner core 151 of the light-to-heat conversion material.

[0043] In the embodiment, the material of the core of the photothermal conversion material and the material of the outer shell of the hydrophobic material are not limited, as long as the material of the inner core of the photothermal conversion material can convert light energy into heat energy, and the material of the outer shell of the hydrophobic material enables the...

no. 3 example

[0046] Based on the technical concepts of the foregoing embodiments, embodiments of the present invention further provide a method for preparing a display substrate, so as to prepare the display substrates of the foregoing embodiments.

[0047] Figure 5 This is a flow chart of a method for preparing a display substrate according to an embodiment of the present invention. like Figure 5 As shown, the preparation method of the display substrate according to the embodiment of the present invention includes:

[0048] 1) forming a pixel definition layer on the base substrate, and a pixel area for accommodating pixel ink is formed between the pixel definition layers;

[0049] 2) forming a light-to-heat conversion layer for converting light energy into heat energy on the pixel defining layer;

[0050] 3) drop pixel ink into the above-mentioned pixel area;

[0051] 4) Heating the pixel ink in the above-mentioned pixel area, and irradiating the above-mentioned light-to-heat conver...

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Abstract

Embodiments of the present invention provide a display substrate, a method for fabricating the same, and a display device. The display substrate includes a base substrate on which a pixel defining layer is provided, and a space for accommodating the pixel defining layer is formed between the pixel defining layers. In the pixel area of ​​the pixel ink, a light-to-heat conversion layer for converting light energy into heat energy is arranged on the pixel defining layer to ensure that the pixel ink has a uniform thickness after film formation and avoids coffee ring effect.

Description

technical field [0001] The present 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 electroluminescent device (Organic Light-Emitting Diode, referred to as: OLED) has the advantages of self-luminescence, fast response, wide viewing angle, high brightness, bright color, light and thin, etc. Next generation display technology. [0003] The film forming method of OLED mainly includes an evaporation process or a solution process. The evaporation process is relatively mature in small-scale applications, and this technology has been used in mass production. The solution process OLED film forming methods mainly include inkjet printing, nozzle coating, spin coating, screen printing, etc. Among them, inkjet printing technology is considered to be a large-scale OLED due to its high material utilization rate a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L27/32H01L51/52H01L51/56
CPCH10K59/60H10K59/12H10K50/87H10K59/1201H10K71/00
Inventor 胡滕滕周波
Owner BOE TECH GRP CO LTD
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