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Light emitting device and manufacturing method thereof

A technology for light-emitting devices and light-emitting layers, which is applied in the direction of lighting devices, electroluminescent light sources, semiconductor/solid-state device manufacturing, etc., and can solve the problems of reducing voltage drop and not being able to fully suppress voltage drop

Active Publication Date: 2016-02-10
JOLED INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the increase in contact resistance, the power supplied to the second electrode decreases, so there is a problem that the voltage drop cannot be sufficiently suppressed

Method used

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  • Light emitting device and manufacturing method thereof
  • Light emitting device and manufacturing method thereof
  • Light emitting device and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0046] A light-emitting device according to one aspect of the present invention includes: a substrate; wiring formed on the substrate for supplying power to a light-emitting layer; and a transition metal oxide layer formed on the substrate across the wiring. a partition wall formed on the transition metal oxide layer and having an opening on the wiring; a blocking layer formed on the transition metal oxide layer exposed from the opening to protect against fluorine moving to block; an organic layer formed on the blocking layer doped with an alkali metal; and an electrode formed on the organic layer through the organic layer, the blocking layer, and the transition The metal oxide layer is electrically connected to the wiring, and supplies electric power supplied from the wiring to the light emitting layer.

[0047] In the light-emitting device according to one aspect of the present invention, a blocking layer is formed on the transition metal oxide layer exposed from the opening...

Embodiment approach 1

[0061] - Overall structure of light emitting device 1 -

[0062] figure 1 It is a block diagram schematically showing the overall configuration of the light emitting device 1 . The light emitting device 1 has an EL display panel 10 and a drive control unit 20 connected thereto. The EL display panel 10 is, for example, a top-emission organic EL display panel that utilizes the electroluminescence phenomenon of organic materials. The drive control unit 20 includes four drive circuits 21 to 24 and a control circuit 25 .

[0063] In addition, the arrangement of the drive control unit 20 with respect to the EL display panel 10 in the actual light emitting device 1 is not limited thereto.

[0064] -Structure of EL display panel 10-

[0065] figure 2 It is a partial cross-sectional view schematically showing the structure of the EL display panel 10 . In addition, in figure 2 In , a part of the EL display panel 10 is extracted and schematically shown. The EL display panel 10...

Deformed example 1

[0144] A modified example in which the formation region of the blocking layer is changed will be described.

[0145] Figure 9 It is a partial cross-sectional view schematically showing the structure of the EL display panel 10a. The EL display panel 10a has the same structure as that of the EL display panel 10 except that the formation region of the blocking layer 108a is different. Thus, in Figure 9 In , the description of the same constituent parts as the EL display panel 10 is omitted, and the different parts are mainly described.

[0146] In Modification 1, the blocking layer 108a is formed on the inner wall 106b1 of the second opening 106b in addition to the region exposed from the second opening 106b on the hole injection layer 105 . With this structure, not only fluorine contained in the residue of the partition wall material can be blocked, but also outgas (fluorine) released from the partition wall 106 can be blocked by the blocking layer 108 a. Therefore, it is ...

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PUM

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Abstract

The invention provides a light-emitting device and a manufacturing method thereof. The light-emitting device has: a substrate (1012); wiring (104), which is formed on the substrate (1012), and is used to supply power to the light-emitting layer; a transition metal oxide layer (105 ), which is formed on the substrate (1012) across the wiring (104); the partition wall (106), which is formed on the transition metal oxide layer (105), has an opening (106b) on the wiring (104); The layer (108), which is formed on the transition metal oxide layer (105) exposed from the opening (106b), blocks the movement of fluorine; the organic layer (109), which is formed on the blocking layer (108), is doped with The electrode (110) is formed on the organic layer (109), and is electrically connected to the wiring (104) through the organic layer (109), the blocking layer (108) and the transition metal oxide layer (105) , the power supplied from the wiring (104) is supplied to the light emitting layer (107).

Description

technical field [0001] The present invention relates to a light emitting device in which a light emitting layer is interposed between a pixel electrode formed for each pixel and a common electrode formed commonly for each pixel. Background technique [0002] As an example of such a device, in a top emission type EL (Electro Luminescence) display device, ITO (Indium Tin Oxide) and IZO (Indium Zinc Oxide) which are transparent conductive materials are generally used as a common electrode. Because they are oxides, their resistance is higher than that of metals such as Al (aluminum) used for pixel electrodes. Therefore, the brightness (brightness) of each light-emitting layer varies due to the voltage drop of the common electrode. [0003] Then, in order to reduce the luminance unevenness of each light-emitting layer, an EL display device having wiring for supplying power to a common electrode (hereinafter, also referred to as “power supply wiring”) has been proposed. Figure 1...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50H05B33/10H05B33/12H05B33/26
CPCH05B33/10H10K50/816H10K50/844H10K59/00
Inventor 佐藤琢也年代健一
Owner JOLED INC