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Composite colour organic electroluminescent display device

A display device and luminescent technology, applied in electroluminescent light sources, electric light sources, lighting devices, etc., can solve problems such as reduced service life, reduced light conversion efficiency, and human eye damage

Inactive Publication Date: 2003-12-31
RITDISPLAY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strong energy of the ultraviolet light generated by this method, it will have a degrading effect on the organic functional materials used in the organic light-emitting diode element and reduce the service life; and the ultraviolet light is also easily absorbed by other materials in the element structure. , so that the light conversion efficiency is reduced; if there is residual ultraviolet light that cannot be fully converted, it will cause damage to the human eye.

Method used

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  • Composite colour organic electroluminescent display device
  • Composite colour organic electroluminescent display device
  • Composite colour organic electroluminescent display device

Examples

Experimental program
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preparation example Construction

[0049] The preparation method of the above-mentioned color conversion layer can be divided into wet process and dry process. One method of the wet process is to weigh and measure the required fluorescent powder and then directly blend it, add an appropriate solvent and mix it with epoxy resin; another method of the wet process is to use sol-gel or co-precipitation After the powder is mixed at the atomic level of the solution, it is then mixed with epoxy resin. After that, it can be spin-coated on the isolation layer or the light-emitting panel by spin coating or printing coating, and then baked to remove the solvent and moisture, and then coat or deposit a protective layer as needed to complete the white light color conversion layer. It is a color conversion layer technology that mixes a single layer of white light microscopically at the original level, so as to overcome the problems of too large a drop in luminous efficiency or poor luminous efficiency in previous technologie...

Embodiment 1

[0053] Example 1 Organic electroluminescence display device

[0054] Please refer to the present invention image 3 , image 3 It is a schematic diagram of a preferred example of the organic electroluminescent display device of the present invention. The organic electroluminescent display device of the present invention is a passive organic electroluminescent display device, comprising: a substrate 300; a cathode (first electrode layer) 352; an anode (second electrode layer) 354; a blue organic electroluminescent display device Light-emitting layer 350; and a phosphor powder color conversion layer 310, the phosphor powder color conversion layer 310 includes a plurality of red phosphors 314, green phosphors 316 and transparent graphics elements 318; dark light absorption cover net 312 ; Isolation layer (overcoating) 340 ; Insulator 360 and a cathodic protection layer 370 .

[0055] Among them, the surface of the substrate 300 is first formed with a dark light-absorbing mask ...

preparation example 2 and 3

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PUM

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Abstract

An all colored organic electroluminescent display device comprising a substrate, a first electrode layer (cathode) at one side of the substrate, a second electrode layer (anode) clamped in the first electrode layer (cathode) and the substrate, an organic electroluminescent layer clamped between the second electrode layer (anode) and the first electrode layer (cathode), and a fluorescent powder color converting layer clamped between the second electrode layer (anode) and the substrate, wherein the organic electroluminescent layer emits the radiation light whose wavelength range covers blue light after current excitation, and the fluorescent powder color converting layer transforms the blue light into red light or green light. The invention also provides a process for making the organic electroluminescent display device.

Description

technical field [0001] The present invention relates to a plane display device, in particular to an organic electroluminescent display device suitable for color display. Background technique [0002] At present, the full-color technology of organic light-emitting displays is roughly two kinds of "three-primary-color light-emitting layer method" and "color filter method". The "three primary color light-emitting layer method" uses red, green, and blue organic light-emitting layers that are independent of each other as light-emitting pixels, while the "color filter method" uses white organic light-emitting layers with color filters as light-emitting pixels. . The three primary color light-emitting layer method of known technology is as figure 1 shown. In this technology, after the anode is formed on the substrate 110 , the red organic light emitter 110 , the green organic light emitter 120 and the blue organic light emitter 130 are evaporated respectively. Afterwards, the c...

Claims

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Application Information

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IPC IPC(8): H05B33/10H05B33/14
Inventor 卢添荣
Owner RITDISPLAY