OLED display substrate, manufacturing method thereof, and display device
A technology for displaying substrates and manufacturing methods, which is applied in semiconductor/solid-state device manufacturing, semiconductor devices, electrical components, etc., and can solve problems such as small contact area, insignificant effect of reducing voltage drop, and poor uniformity of brightness. Achieve the effect of increasing the contact area, reducing the voltage drop, and good voltage drop
Active Publication Date: 2022-07-26
BOE TECH GRP CO LTD +1
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[0035] In order to make the objectives, technical solutions and advantages of the present disclosure clearer, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.
[0036] figure 1 It is a schematic diagram of a partial structure of an OLED display substrate provided by an embodiment of the present disclosure. like figure 1 As shown, the OLED display substrate includes a substrate 10 , an auxiliary electrode 20 , a pixel defining layer 30 and a first electrode 40 located on the substrate 10 .
[0037] figure 2 Yes figure 1 Schematic diagram of the cross-section comparison at A-A and B-B in . like figure 2 As shown, the illustrated pixel defining layer 30 includes a bank 31 having a top surface 31 a and sidewalls 31 b enclosing a plurality of sub-pixel regions 10 a . The top surface 31 a of the bank 31 has a notch 31 c extending toward the substrate 10 , and the notch 31 c communicates with the ...
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Abstract
The present disclosure provides an OLED display substrate, a manufacturing method thereof, and a display device, and relates to the field of display devices. The OLED display substrate includes a substrate, an auxiliary electrode, a pixel defining layer and a first electrode on the substrate. The pixel defining layer includes a dam, the dam has a top surface and sidewalls enclosing a plurality of sub-pixel regions, and the top surface of the dam is far from the dam. The surface of the substrate, the top surface of the embankment has a notch extending to the substrate, the gap is connected to the sub-pixel area on the side wall of the embankment, the auxiliary electrode is located on the top surface of the embankment or the auxiliary electrode is embedded in the embankment, and the auxiliary electrode has a distance away from the substrate. The upper surface and the side connected to the upper surface, the first electrode covers the pixel defining layer and the auxiliary electrode, and the first electrode is in contact with the upper surface of the auxiliary electrode and the side surface located in the gap, which increases the distance between the first electrode and the auxiliary electrode. The contact area can better reduce the voltage drop and improve the uniformity of the brightness of the display device.
Description
technical field [0001] The present disclosure relates to the field of display devices, and in particular, to an OLED display substrate, a manufacturing method thereof, and a display device. Background technique [0002] The OLED display device includes a bottom emission type structure and a top emission type structure. Since the top emission type structure can significantly increase the aperture ratio of the OLED display device and increase the pixel density (Pixels Per Inch, PPI for short), the top emission type OLED display device is currently a hot spot in the development of display technology. [0003] Since the cathode of the top-emission OLED display device is formed of transparent or semi-transparent conductive materials and has a relatively thin thickness, the resistance value of the cathode is relatively high, which will lead to a serious voltage drop (IR-drop), thus affecting the display of the OLED display device. uniformity of brightness. [0004] In order to r...
Claims
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IPC IPC(8): H01L27/32H01L51/52
CPCH10K59/122H10K59/123H10K50/805
Inventor 陈建宇
Owner BOE TECH GRP CO LTD