OLED array substrate and preparation method thereof, display panel and display device
An array substrate and anode technology, which is applied in the field of OLED array substrates and its preparation, can solve the problems of affecting display quality, poor dark spots, and easy formation of sharp discharges, etc., to achieve the effect of ensuring display quality and preventing dark spots
Active Publication Date: 2020-07-17
BOE TECH GRP CO LTD +1
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Problems solved by technology
Wherein, the edge protection layer of the anode 40 only has the pixel defining layer 50. figure 2 In the case of edge warping as shown, since the edge of the anode 40 is warped, the film layer between the edge of the anode 40 and the cathode 80 is relatively thin, and it is very easy to form a tip discharge, which will cause dark spots and affect the display quality.
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[0045] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.
[0046] "On", "formed on" and "arranged on" in the present invention may mean that one layer is directly formed or disposed on another layer, or that one layer is formed indirectly or Set on another layer, that is, there are other layers between the two layers.
[0047] It should be noted that although the terms "first", "second" and the like may be used herein to describe various components, components, elements, regions, layers and / or sections, these components, components, elements, regions, layers and / or parts should n...
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Abstract
The invention discloses an OLED array substrate and a preparation method thereof, a display panel and a display device. A specific embodiment of the OLED array substrate comprises a substrate; an anode formed on the substrate; a pixel defining layer which surrounds and covers the edge of the anode; an OLED light emitting layer formed on the anode; a passivation layer formed on the pixel defining layer, wherein the orthographic projection of the passivation layer on the substrate covers the orthographic projection of the anode edge covered by the pixel defining layer on the substrate; and a cathode which covers the passivation layer and the OLED light-emitting layer. According to the embodiment, the problem of poor dark spots caused by point discharge under the condition that the edge of the anode tilts due to the process reasons, can be effectively prevented.
Description
technical field [0001] The invention relates to the field of display technology. More specifically, it relates to an OLED array substrate and a preparation method thereof, a display panel and a display device. Background technique [0002] Such as figure 1 As shown, the structure of the existing OLED array substrate is: a substrate 10; a thin film transistor layer 20 formed on the substrate 10; a planarization layer (PLN) 30 formed on the thin film transistor layer 20; The anode (Anode) 40 on the top and the pixel definition layer (PDL) 50 surrounding and covering the edge of the anode 40; the OLED light-emitting layer 60 formed on the anode 40; the support layer (PS) 70 formed on the pixel definition layer 50; covering The pixel defining layer 50 , the OLED light emitting layer 60 and the cathode 80 of the supporting layer 70 . Wherein, the edge protection layer of the anode 40 only has the pixel defining layer 50. figure 2 In the case of edge warping shown, the film l...
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IPC IPC(8): H01L21/77H01L51/52H01L27/32
CPCH10K59/12H10K50/844H10K59/1201
Inventor 马玲玲刘亮亮彭利满米红玉闫晓峰高乐
Owner BOE TECH GRP CO LTD