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A kind of organic light-emitting diode substrate and its preparation method, display panel

A technology of light-emitting diodes and substrates, applied in semiconductor devices, electrical components, circuits, etc., can solve problems such as poor uniformity of film morphology, achieve balanced redistribution process, slow down solvent evaporation, improve life and display effects

Active Publication Date: 2020-11-27
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the embodiments of the present invention is to provide a substrate and its preparation method, and a display panel, so as to solve the technical problem of poor uniformity of the morphology of the film formed by the inkjet printing process in the direction of the major axis and the minor axis

Method used

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  • A kind of organic light-emitting diode substrate and its preparation method, display panel
  • A kind of organic light-emitting diode substrate and its preparation method, display panel
  • A kind of organic light-emitting diode substrate and its preparation method, display panel

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no. 1 example

[0049] figure 2 It is a schematic structural view of the organic light emitting diode substrate according to the first embodiment of the present invention. image 3 for figure 2 Schematic diagram of the A-A cross-sectional structure. Figure 4 for figure 2 Schematic diagram of the B-B cross-sectional structure. The substrate includes a base 10 and a pixel defining layer 30 disposed on the base 10 to define a plurality of pixel regions 20 . from figure 2 It can be seen from the figure that the pixel area 20 is in the shape of a rectangle, A-A is along the short axis of the pixel area 20 ie the first direction, and B-B is along the long axis of the pixel area 20 ie the second direction. In the first direction, the width of the bottom of the cross section of the pixel defining layer 30 is smaller than the width of the top, such as image 3 shown. In the second direction, the width of the bottom of the cross section of the pixel defining layer 30 is greater than the wid...

no. 2 example

[0066] The main structure of the substrate of the second embodiment of the present invention is the same as that of the first embodiment. The difference is that, in the first direction, the two sides of the cross-section of the pixel defining layer protrude toward the pixel area. curve, such as Image 6 as shown, Image 6 It is a schematic diagram of the A-A cross-sectional structure of the substrate of the second embodiment of the present invention. from Image 6It can be seen from the figure that, in the first direction, the two sides of the cross-section of the pixel defining layer 30 are curves protruding toward the pixel area 20 , and it is easy to understand that the curve can be a parabola. Compared with a straight line, such a side shape is easier to cover the solution at the bottom of the pixel region 20, further slowing down the solvent evaporation, further reducing the airflow loss velocity in the first direction, and further improving the organic light-emitting l...

no. 3 example

[0083] Figure 9 It is a schematic diagram of the A-A cross-sectional structure of the substrate of the third embodiment of the present invention. The main structure of the substrate of the third embodiment of the present invention is the same as that of the first embodiment. The difference is that, in the first direction, one side of the cross-section of the pixel defining layer is a straight line, and is connected to the pixel defining layer. The angle formed by the bottom edge of the cross-section is 105°-135°, and the other side is a straight line, which is perpendicular to the bottom edge of the cross-section of the pixel defining layer. like Figure 9 As shown, in the first direction, the side 31 of the cross-section of the pixel defining layer 30 is a straight line, and the angle formed by the side 31 and the bottom is α, α is greater than 90°, preferably α is 105°˜135°. The other side 31' is also a straight line, and the angle between the side 31' and the bottom is α...

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Abstract

The invention discloses an organic light emitting diode substrate, a preparation method thereof, and a display panel. The substrate includes a base and a pixel defining layer arranged on the base to define a plurality of pixel regions. In the first direction, the width of the bottom of the cross section of the pixel defining layer is smaller than the width of the top. In the second direction, the cross section of the pixel defining layer The width of the bottom is greater than the width of the top. For such a substrate, when the organic light-emitting material solution is printed on the pixel area, during the drying process, the airflow loss in the pixel area is relatively slow in the first direction, while the airflow loss in the second direction is relatively fast, thereby offsetting the microaction and migration. The effect of distance on drying balances the redistribution process of the organic light-emitting material in the pixel area, improves the uniformity of the morphology of the organic light-emitting layer in the first direction and the second direction, and improves the lifespan and display effect of the OLED device. The invention also proposes a preparation method of the substrate and a display panel comprising the substrate.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an organic light emitting diode substrate, a preparation method thereof, and a display panel. Background technique [0002] Organic Light-Emitting Diode (OLED) is hailed as a new generation of display technology, and is considered to have broad application prospects due to its advantages of high response, high contrast, and flexibility. The inkjet printing technology in the OLED film formation technology is considered to be an important way to realize the mass production of large-size OLEDs due to its high material utilization rate. [0003] In the process of inkjet printing and film formation of OLEDs, the solvent needs to be removed through a subsequent process, so that the solute is dried to form the required organic light-emitting layer. Therefore, the drying process for solvent removal has a crucial impact on the morphology of the organic light-emitting layer. For optoele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L27/32
CPCH10K59/122H10K59/1201
Inventor 罗程远
Owner BOE TECH GRP CO LTD
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