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OLED display device, display substrate and preparation method thereof

A technology for display devices and light-emitting layers, applied in semiconductor/solid-state device manufacturing, semiconductor devices, electric solid-state devices, etc., can solve problems such as heat generated by OLED display devices, color shift of OLED display devices, etc.

Active Publication Date: 2020-05-19
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The inventors found that the existing OLED display device has the following problems: OLED display device itself will generate heat during use, and continuous use for a long time will cause color shift in the white screen of the OLED display device

Method used

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  • OLED display device, display substrate and preparation method thereof
  • OLED display device, display substrate and preparation method thereof
  • OLED display device, display substrate and preparation method thereof

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0037] Such as figure 1 and 2 As shown, this embodiment provides an OLED display device, including: an anode, a cathode, and a light emitting layer 3 located between the cathode and the anode. The material of the light-emitting layer 3 generally includes organic light-emitting materials. The light-emitting principle of OLED display devices is: organic light-emitting materials are driven by an electric field to cause light emission through carrier injection and recombination. Specifically, OLED display devices usually use ITO pixel electrodes and metal electrodes as the anode and cathode of the device, respectively. Under a certain voltage drive, electrons and holes are injected from the cathode and anode into the electron transport layer 7 and the empty transport layer 5 respectively. and holes respectively migrate to the light-emitting layer 3 and meet in the light-emitting layer 3 to form excitons and excite light-emitting molecules, which emit visible light through radiat...

Embodiment 2

[0050] This embodiment provides a display substrate, including a plurality of display devices, at least some of which include any one of the OLED display devices provided in Embodiment 1.

[0051] Display devices of different colors usually need to be provided in the display panel to realize full-color display, for example, OLED display devices of three different colors R (Red; red) G (Green; green) B (Blue; blue) are used to form pixel units. In this embodiment, the display substrate is formed based on the OLED display device provided in Embodiment 1, which can effectively avoid display errors caused by temperature changes of the display substrate and improve the performance of the display substrate.

[0052] The luminescent color of an OLED display device is determined by the material of the organic luminescent layer 3 therein, and the organic luminescent materials in OLED display devices with different luminescent colors are different. The relationship between brightness an...

Embodiment 3

[0059] This embodiment provides a method for preparing an OLED display device, including:

[0060] S1. Forming a first electrode 1 on a substrate.

[0061] In this step, the first electrode layer can be formed on the substrate by evaporation, sputtering, deposition, etc., and then the first electrode layer can be patterned by an etching process, so as to form the first electrode 1 .

[0062] S2 , forming a light emitting layer 3 on the first electrode 1 . Wherein, the material of the light-emitting layer 3 includes at least: an organic light-emitting material and a temperature-induced phase-change material; within the first temperature range, the fluorescence intensity of the temperature-induced phase-change material decreases as the temperature increases; the first electrode 1 and the second electrode 2, one is the anode and the other is the cathode.

[0063] It can be understood that, in this embodiment, when the light-emitting layer 3 of the OLED display device is formed ...

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Abstract

The invention provides an OLED display device, a display substrate and a preparation method thereof, and belongs to the technical field of display. The OLED display device comprises an anode, a cathode and a light-emitting layer located between the cathode and the anode. Materials of the light-emitting layer at least comprise an organic light-emitting material and a temperature-induced phase change material; and in the first temperature range, the fluorescence intensity of the temperature-induced phase change material is reduced along with the temperature rise.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to an OLED display device, a display substrate and a preparation method thereof. Background technique [0002] Organic Light Emitting Display (Organic Light Emitting Display; [0003] OLED) has many advantages such as self-illumination, low driving voltage, high luminous efficiency, short response time, high definition and contrast, nearly 180° viewing angle, wide operating temperature range, and flexible display and large-area full-color display. It is recognized as the display device with the most development potential. [0004] The inventors have found that the existing OLED display devices have the following problems: OLED display devices themselves generate heat during use, and continuous use for a long time will cause color shift in the white screen of the OLED display device. Contents of the invention [0005] The present invention aims to solve at least one ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/54H01L51/56
CPCH10K85/30H10K50/13H10K71/00
Inventor 郑克宁
Owner BOE TECH GRP CO LTD