Pixel defining layer and its preparation raw material and preparation method, display substrate
A technology of pixel defining layer and defining layer, which is applied in the direction of electric solid devices, electrical components, circuits, etc., to achieve the effect of simplifying the preparation process
Active Publication Date: 2020-08-28
BOE TECH GRP CO LTD +1
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[0004] However, the above preparation method increases the process complexity
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[0028] In order to make the technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0029] It should be noted that, in the display device, the pixel defining layer includes: a bounding area (also called Bank area), and a pixel area (also called pixel opening area) defined by the bounding area. Wherein, the delimiting area is directly formed by the pixel delimiting layer. In order to solve the current process of preparing the pixel definition layer, it is necessary to use two, or even more than two kinds of raw materials with different affinity and lyophobicity, and to form it through multiple patterning processes, resulting in complicated process and raw material limitations, etc. Problem, the embodiment of the present invention provides a raw material that can be used to prepare the upper lyophobic and lower lyophilic pixel defining ...
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Abstract
The invention provides a pixel defining layer, its preparation raw material and preparation method, and a display substrate, and relates to the field of display technology. The raw materials for the preparation of the pixel defining layer include the following components by mass percentage: 5%-30% lyophobic film-forming polymer, 0.5%-1% lyophilic magnetic nanoparticles, 0.5%-2% photoinitiated agent, 0.1%-1% reactive monomer, 0.1%-1% additive and the balance solvent. Through the synergistic effect of the various components composed of the above ratios, a pixel boundary layer showing a gradient change from lyophobic to lyophilic from the top to the bottom can be formed, which can effectively prevent the pixel raw material solution from spreading on the top of the pixel area and contaminating adjacent pixels. The pixel raw material solution can also be evenly spread on the bottom of the pixel area to form a pixel layer with uniform thickness. During the preparation process, the lyophilic magnetic nanoparticles can be induced to the lower part of the defining layer body by an external magnetic field, so as to endow the lower part of the defining layer body with lyophilic properties, which effectively simplifies the preparation process.
Description
technical field [0001] The invention relates to display technology, in particular to a pixel defining layer, its preparation raw material and preparation method, and a display substrate. Background technique [0002] For the preparation of display devices such as Organic Light-Emitting Diode (OLED) and Liquid Crystal Display (LCD), a wet film-forming process, such as an inkjet printing process, is usually used. The organic solution is printed in the pixel area defined by the layer, and the pixel layer is formed after drying. On the one hand, in order to prevent the organic solution from spreading on the top of the pixel area and contaminating adjacent pixels, it is desirable that the upper area of the pixel defining layer is lyophobic; on the other hand, in order to make the organic solution spread evenly at the bottom of the pixel area to form For the pixel layer, it is desirable that the bottom of the pixel defining layer is lyophilic. [0003] At present, in order to ...
Claims
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IPC IPC(8): H01L27/32G02F1/13G02F1/1362
CPCG02F1/1303G02F1/1362H10K59/122C08K5/08C08K5/18C08K5/07C08K2201/011C08K2201/01C08F220/14C08F2438/01C08F292/00C08F293/005C08L23/16C08F220/306C08F220/282C08F220/343C08F220/28C08F220/34C08K3/22C08K5/06C08K5/13C08K5/32C08K2003/2272C08K2201/005C08L33/12C08L33/16C08L83/04C08L2203/206C08L2205/02
Inventor 李伟夏晶晶周斌王东方赵策胡迎宾宋威
Owner BOE TECH GRP CO LTD