A kind of oled lighting screen body with light-emitting elements connected in series and preparation method thereof

A technology of light-emitting elements and light-emitting layers, which is applied in the fields of electrical components, semiconductor/solid-state device manufacturing, semiconductor devices, etc., and can solve problems such as high proportion of short-circuit failure current and affecting lighting effects

Active Publication Date: 2021-06-11
GUAN YEOLIGHT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resistance of the anti-short-circuit part is about tens to two thousand ohms, basically it is difficult to exceed two thousand ohms, because the resistance of the anti-short-circuit part is not large enough, the short-circuit failure current occupies a high proportion, and it will be significantly observed on the constant current power supply When the overall brightness decreases, this situation will directly affect the lighting effect in OLED lighting screens

Method used

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  • A kind of oled lighting screen body with light-emitting elements connected in series and preparation method thereof
  • A kind of oled lighting screen body with light-emitting elements connected in series and preparation method thereof
  • A kind of oled lighting screen body with light-emitting elements connected in series and preparation method thereof

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Effect test

Embodiment 1

[0036] This embodiment provides an OLED lighting screen body in which light-emitting elements are connected in series, which includes a substrate and a plurality of light-emitting elements arranged on the substrate. The substrate is divided into N light-emitting areas, and each light-emitting area includes M light-emitting elements connected in series through metal, wherein M and N are both integers and M≥2, N≥50. It is sufficient that the metal can achieve electrical conductivity, preferably a single layer of aluminum material, a single layer of silver material, or a stacked arrangement of an aluminum material layer and a silver material layer.

[0037] by figure 1The screen body shown is taken as an example, in which a plurality of light-emitting elements 1 (2) are arranged on the substrate 3, and the light-emitting element 1 and the light-emitting element 2 are divided into a group in the figure, wherein the first electrode of the light-emitting element 1 and the light-emit...

Embodiment 2

[0056] In the OLED lighting screen body in which the light-emitting elements are connected in series provided in this embodiment, such as Figure 4 As shown, it also includes an auxiliary electrode 7 disposed between the light-emitting elements and electrically connected to the metal; an insulating layer 8 covers the auxiliary electrode 7 . For this reason, the sheet resistance of the auxiliary electrode can be selected to be less than or equal to 2Ω / □. The auxiliary electrode 7 can further play a role of preventing short circuit.

[0057] In addition, the width of the metal in this embodiment satisfies the following condition: when more than a set number of light-emitting elements in the light-emitting region have short-circuit defects, the metal will be fused. That is to say, when multiple light-emitting elements are short-circuited, that is, a severe short-circuit phenomenon, the metal is fused to form an open circuit protection mechanism. For example, if there are two li...

Embodiment 5

[0059] This embodiment provides an OLED lighting screen body and its preparation method. Each light-emitting area of ​​the OLED lighting screen body includes a common type first electrode and a set of separate type first electrodes such as Figure 5a As shown, wherein the number of separated first electrodes is N, the preparation method comprises the following steps:

[0060] Step 1: Prepare a plurality of common-type first electrodes 11 and multiple sets of separate-type first electrodes 12 on the substrate, each set of separate-type first electrodes includes P separate-type first electrodes 12, and P The separate first electrodes 12 are arranged in sequence along the length direction of the common first electrodes 11 . Figure 5a In the diagram, a common type first electrode 11 and a group of separate type first electrodes 12 are taken as an example for schematic illustration. In practical application, more electrodes may be distributed according to this arrangement. The pa...

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Abstract

The present invention provides an OLED lighting screen with series-connected light-emitting elements and a preparation method thereof, wherein the OLED lighting screen is divided into N light-emitting areas, and each light-emitting area includes M light-emitting elements connected in series. When different light-emitting elements in each light-emitting region act as anti-short-circuit resistors for each other, and when a short-circuit defect occurs in one light-emitting element, other light-emitting elements connected in series with it can play a role in preventing short-circuit. When M is greater than or equal to 2 and N is greater than or equal to 50, even if a short-circuit defect point appears in a certain light-emitting area, the current value in this light-emitting area will only decrease by less than 2%, so there is almost no effect on the brightness of the lighting screen. influences. That is to say, through the above solution, a very simple structure can be adopted to ensure that the brightness of the lighting screen body is not affected while achieving the effect of preventing short circuit.

Description

technical field [0001] The invention relates to the technical field of organic light-emitting devices, in particular to an OLED lighting screen with light-emitting elements connected in series and a preparation method. Background technique [0002] OLED (Organic Light-Emitting Diode) and organic photovoltaic devices are representative of organic optoelectronic devices. The OLED device includes a substrate, a first electrode, an organic layer and a second electrode, at least one of the first electrode and the second electrode is made of a transparent or translucent material. Defects such as dust particles, burrs, pinholes, and cracks inevitably exist in the OLED screen manufacturing process. For this reason, the first electrode and the second electrode of the OLED panel may directly contact to cause a defect (called a short circuit point), or the organic layer between the anode and the cathode becomes thinner than other positions. When the OLED screen is working, the curren...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L27/32H01L23/62H01L51/56G09F9/33
Inventor 李育豪谢静胡永岚朱映光于倩倩郭立雪吕勇冯建斌
Owner GUAN YEOLIGHT TECH CO LTD
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