Array substrate and preparation method thereof, display panel and display device
A technology for array substrates and display panels, which is applied to organic semiconductor devices, electrical components, electrical solid devices, etc., can solve the problems of uneven film formation in pixels and uneven light emission of devices, so as to improve the uniformity of light emission, suppress light emission, and improve the The effect of film formation uniformity
Inactive Publication Date: 2019-06-14
BOE TECH GRP CO LTD
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Problems solved by technology
[0004] During the drying and film formation process of inkjet printing, the solvent vapor evaporates faster at the edge of the droplet, which will cause the solution to flow from the center to the edge of the droplet, and this flow will drive the solute to migrate to the edge of the droplet, and finally to Deposition, forming a deposition morphology with thick edges and thin center, which is called "coffee ring effect", which makes the film formation in the pixel very uneven, which will lead to uneven light emission of the device
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[0035] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. In the drawings, the thickness of regions and layers are exaggerated for clarity. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.
[0036] It should be noted that terms such as upper and lower in the present invention are only relative concepts or refer to the normal use state of the product, and should not be regarded as limiting.
[0037] Such as figure 1 A schematic diagram of an array substrate according to an embodiment of the present invention is shown. Such as figu...
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The invention provides an array substrate. The array substrate comprises a substrate; a flattening layer formed on the substrate; multiple pixel electrodes formed on the flattening layer; and a pixeldefining layer which comprises a first pixel defining layer and a second pixel defining layer, wherein the first pixel defining layer is covered at the periphery of the pixel electrode and a pixel electrode center region is exposed, the second pixel defining layer is formed on the flattening layer between adjacent pixel electrodes, and is provided with multiple openings for limiting various sub-pixel units; the predetermined distance is spaced between the bottom of a dike part of the second pixel defining layer and the bottom of the dike part of the adjacent first pixel defining layer, and thethickness of the second pixel defining layer is greater than that of the first pixel defining layer. The invention further provides a preparation method of the array substrate and a display device containing the array substrate. The array substrate provided by the invention can form a more uniform organic luminescent layer, and the edge of the organic luminescent layer is free from the corresponding pixel electrode, and the luminescence uniformity in the pixel is improved.
Description
technical field [0001] The invention relates to the field of display technology, in particular to an array substrate and a preparation method thereof, a display panel and a display device. Background technique [0002] Inkjet printing polymer electroluminescent display (PLED) technology has the advantages of simple operation, low cost, simple process, and easy realization of large size. With the continuous research and development of high-performance polymer materials and the further improvement of film preparation technology, PLED The technology is expected to achieve rapid industrialization. [0003] Inkjet printing technology is to spray the solution of hole injection material, hole injection material, and red, green, and blue three-color light-emitting materials on the sub-pixels on the pre-patterned ITO substrate through a micron-scale printing nozzle. In the pit, red, green and blue three primary color light-emitting pixel units are formed. The thickness of the film ...
Claims
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IPC IPC(8): H01L27/32H10K99/00
CPCH10K59/122H10K71/135H10K59/1201H10K71/00H10K71/231H10K2102/351
Inventor 崔颖
Owner BOE TECH GRP CO LTD