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Organic electroluminescent display panel and method for manufacturing same

A display panel and electroluminescence technology, applied in electroluminescence light sources, electric light sources, organic semiconductor devices, etc., can solve the problems of eye-catching anode wiring and poor transparency.

Inactive Publication Date: 2014-06-25
TOPPAN PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In this way, in any conventional technology, there are technical problems that the anode wiring becomes conspicuous and poor in transparency when light is not emitted.

Method used

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  • Organic electroluminescent display panel and method for manufacturing same
  • Organic electroluminescent display panel and method for manufacturing same
  • Organic electroluminescent display panel and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] Hereinafter, examples of the present invention will be described.

[0115] As a transparent substrate, alkali-free glass OA-10 manufactured by NEC Glass Co., Ltd. was prepared. The size of the substrate is 200 mm x 200 mm, in which the diagonal is 5 inches, and the display part of the display is arranged in the center.

[0116] This substrate was set in a sputter deposition apparatus equipped with ITO (indium tin oxide), and formed on the entire surface so as to have a thickness of 50 nm.

[0117] Next, after forming a positive resist TFR790PL manufactured by Ohka Co., Ltd. on the entire surface of the substrate with a thickness of 2 μm by a spin coater, the anode is retained by photolithography, the anode is removed from the wiring, and the light transmittance adjustment layer is used. Ferric chloride aqueous solution Wet etching is performed to form an anode, an anode extraction wiring, and a light transmittance adjustment layer. In addition, the distance between th...

Embodiment 2

[0129] After forming ITO on the entire surface of the transparent substrate by the same method as in Example 1, use a spin coater to form a positive resist TFR790PL made by Ohka on the entire surface of the substrate with a thickness of 2 μm, and leave the anode and anode by photolithography. The wiring is taken out, and wet etching is performed with an aqueous solution of ferric chloride to form an anode, and the wiring for taking out the anode.

[0130] Thereafter, SiN was formed on the entire surface by plasma CVD to have a film thickness of 50 nm, and the transmittance adjustment layer made of SiN was patterned by the same photolithography and dry etching as above.

[0131] Hereinafter, an organic EL display panel was produced in the same manner as in Example 1.

[0132] The thus-obtained organic EL display panel exhibited favorable light emission characteristics and was normally driven.

[0133] In addition, as a result of measuring the light transmittance when not emitt...

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PUM

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Abstract

The present invention provides a transparent organic EL display panel wherein transparency is not deteriorated even when light is not emitted. In order to provide the transparent organic electroluminescent display panel, the panel is characterized in being provided with: a transparent first electrode formed on a transparent substrate; a transmittance adjusting layer, which is formed on the transparent substrate by being spaced apart from the transparent first electrode; barrier ribs, which are formed on the transparent substrate and the transmittance adjusting layer such that the transparent first electrode is partitioned; a light emitting medium layer, which is formed on the transparent first electrode, and includes at least an organic light emitting layer; and a transparent second electrode, which is formed on the light emitting medium layer.

Description

technical field [0001] The invention relates to an organic electroluminescence display panel and a manufacturing method thereof. Background technique [0002] Organic electroluminescent elements (hereinafter, organic EL elements) form an organic light-emitting layer composed of organic light-emitting materials between two opposing electrodes. When a voltage is applied between the two electrodes, holes are injected from the anode and holes are injected from the cathode. Electrons and current flow through the organic light-emitting layer, and the holes and electrons recombine in the organic light-emitting layer to emit light. [0003] Generally, as a substrate for a display panel, a substrate in which patterned photosensitive polyimide is formed in a partition shape to partition light-emitting pixels is used. At this time, the partition pattern is formed so as to cover the edge portion of the transparent electrode formed as an anode. [0004] A carrier injection layer (also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/02G09F9/30H01L27/32H01L51/50H05B33/10
CPCH01L27/3244H05B33/10H05B33/28H01L27/3288H01L2251/5323H01L51/5012H01L51/5262H01L51/5203H01L51/5234H10K59/179H10K2102/3031H10K59/875H10K59/80524H10K50/805H10K50/11H10K59/12H10K50/85H10K50/828
Inventor 正田亮
Owner TOPPAN PRINTING CO LTD