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Organic light emitting display device

A light-emitting display and equipment technology, which is applied to organic light-emitting devices, organic light-emitting device parameters, organic semiconductor devices, etc., and can solve the problems of low color purity and reliability of organic light-emitting display devices

Active Publication Date: 2014-06-18
LG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, a color shift phenomenon according to a viewing angle occurs, and thus conventional organic light emitting display devices have lower reliability in terms of color purity.

Method used

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Embodiment Construction

[0049]Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

[0050] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and the following examples.

[0051] figure 2 is a cross-sectional view of the organic light emitting display device of the present invention.

[0052] like figure 2 As shown, the organic light emitting display device includes a red light emitting unit, a green light emitting unit and a blue light emitting unit formed on a substrate 101 .

[0053] Each of the red light emitting unit, the green light emitting unit and the blue light emitting unit includes a first electrode 102, a hole injection layer (HIL) 112, a first hole transport layer (HTL) 114 sequentially formed...

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Abstract

An organic light emitting display device with enhanced color purity according to viewing angle is disclosed. The organic light emitting display device includes a first electrode formed on a substrate and being a reflective electrode, a second electrode facing the first electrode and being a semi-transparent electrode, and red, green and blue emission layers formed between the first and second electrodes, wherein a maximum electroluminescent peak of each of the red, green and blue emission layers and a maximum photoluminescence peak of a host included in each emission layer satisfy Equations 1 to 3 below: wherein RED EL max is a maximum electroluminescent peak of the red emission layer, and RH PL max is a maximum photoluminescence peak of a red host included in the red emission layer, wherein GREEN EL max is a maximum electroluminescent peak of the green emission layer, and GH PL max is a maximum photoluminescence peak of a green host included in the green emission layer, and wherein BLUE EL max is a maximum electroluminescent peak of the blue emission layer, and BH PL max is a maximum photoluminescence peak of a blue host included in the blue emission layer.

Description

[0001] This application claims priority from Korean Patent Application No. 10-2012-0148822 filed on December 18, 2012, which is incorporated herein by reference as if fully set forth herein. technical field [0002] The present invention relates to an organic light emitting display device having enhanced color purity according to a viewing angle. Background technique [0003] An organic light emitting display device, which is a form of a flat panel display device, is a self-luminous device and has faster response speed, higher luminous efficiency, higher brightness, and wider viewing angle than other flat panel display devices. An organic light emitting display device includes an anode, a cathode opposite to the anode, and an organic light emitting layer (EML) disposed between the anode and the cathode. Holes injected from the anode and electrons injected from the cathode are recombined in the organic EML to form excitons as electron-hole pairs, and the excitons return to a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/32H01L51/50H01L51/54
CPCH01L51/5064H01L51/5265H01L27/3211H01L51/0077H01L2251/5384H01L51/5012H01L51/504H01L51/5218H01L51/0072H01L51/0058H01L51/0081H01L51/5234H10K59/35H10K85/626H10K85/30H10K85/6572H10K85/324H10K50/156H10K50/11H10K2101/90H10K59/80518H10K59/80524H10K50/13H10K50/852H10K50/818H10K50/828
Inventor 李世熙金官洙李锡宗朴镇镐权纯甲
Owner LG DISPLAY CO LTD
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