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
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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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