OLED display substrate, manufacturing method thereof, and display device
A display substrate and manufacturing method technology, applied to semiconductor devices, electrical components, circuits, etc., can solve problems such as ink overflow, inkjet droplet volume cannot be accurately controlled, pixel cross-color, etc., to increase film thickness , improve the display quality, and avoid the effect of pixel cross-color
Active Publication Date: 2020-12-22
HEFEI XINSHENG OPTOELECTRONICS TECH CO LTD +1
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Problems solved by technology
[0005] In the process of preparing the OLED display substrate by inkjet printing, the ink is printed into the pixel area defined by the pixel defining layer. If the nozzle shakes, the falling track of the ink deviates from the predetermined track and drops into the adjacent pixel area. It will cause color crossing of pixels; in addition, the amount of inkjet droplets cannot be precisely controlled, which may cause ink overflow in some pixels, and also cause color crossing of pixels
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[0036] In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.
[0037] Such as figure 1 As shown, in the prior art, when inkjet printing is performed, the nozzle 1 has a constriction phenomenon. Necking refers to the phenomenon of local section reduction that may occur in materials under tensile stress. In inkjet printing, the power source for the formation of necking is the liquid's own weight, liquid surface tension, kinetic energy obtained by the liquid flying out of the nozzle, and the state of the nozzle before ejection (including the temperature gradient of the nozzle, such as figure 2 The result of the combined effect of different factors such as the residual liquid in the nozzle shown). The position of the necking is difficult to control precisely, resulting in a certain difference each ...
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The invention provides an OLED display substrate, a manufacturing method thereof, and a display device, belonging to the field of display technology. Wherein, the OLED display substrate includes a pixel defining layer on the base substrate, the pixel defining layer defines a pixel area, and the OLED display substrate further includes an expandable retaining wall, the retaining wall is switchable between a first state and a second state, the height of the retaining wall in the first state is greater than the height of the retaining wall in the second state high. The technical scheme of the invention can avoid the problem of cross-color of pixels.
Description
technical field [0001] The invention relates to the field of display technology, in particular to an OLED display substrate, a manufacturing method thereof, and a display device. Background technique [0002] With the advent of the information age, conventional cathode ray tube (CRT) displays have been replaced by flat panel displays. One of the most used flat panel displays is liquid crystal display (LCD). LCD has the characteristics of mature technology and low price, but Since LCDs are not self-illuminating, there are technical limitations in terms of contrast, viewing angles, flexible displays, and power consumption. Organic light-emitting diodes (OLEDs) have the characteristics of self-illumination, wide viewing angle, short response time, high luminous efficiency, wide color gamut, low operating voltage, thin panels, and the ability to produce large-sized and flexible displays, so they have attracted much attention. An existing OLED display panel mainly includes a sub...
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IPC IPC(8): H01L27/32
CPCH10K59/00H10K59/122
Inventor 李宁宁毛波江昌俊窦义坤李俊徐阳哈朗朗高袁挥杨种波熊先江
Owner HEFEI XINSHENG OPTOELECTRONICS TECH CO LTD