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Organic light emitting display device and manufacturing method thereof

A light-emitting display and organic technology, applied in semiconductor/solid-state device manufacturing, electrical components, electric solid-state devices, etc., can solve the problems of low color gamut of organic light-emitting display and cannot meet people's needs, so as to improve color purity and reduce production cost , Improve the effect of display color gamut

Inactive Publication Date: 2018-08-24
YUNGU GUAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the existing organic luminescent display has a low color gamut and cannot meet people's needs.

Method used

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  • Organic light emitting display device and manufacturing method thereof
  • Organic light emitting display device and manufacturing method thereof
  • Organic light emitting display device and manufacturing method thereof

Examples

Experimental program
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Embodiment approach

[0039] As an embodiment of the present invention, in this example, the microcavity optical path L of the green light unit G and luminescence wavelength λ G Satisfy the following formula: L G =n G lambda G , n Gis an integer greater than 2. Setting the first green light compensation layer and the second green light compensation layer can increase the length of the corresponding microcavity, that is, it can increase the distance of light propagating in the microcavity, so that the green light unit can realize a 3rd-order microcavity or a higher-order microcavity , which can effectively narrow the spectrum and increase the color gamut area.

[0040] At the same time, optionally, as another embodiment of the present invention, the microcavity optical path L of the red light unit R and luminescence wavelength λ R Satisfy the following formula: L R =n R lambda R , n G >n R >1,n R is an integer.

[0041] The microcavity optical path L specifically refers to the distance...

Embodiment 1

[0052] This embodiment provides an organic light emitting display device, such as image 3 As shown, it includes a first electrode layer 1 , a light-emitting layer and a second electrode layer 2 stacked up, and the light-emitting layer includes a red light unit 31 , a green light unit 32 , and a blue light unit 33 juxtaposed. The first electrode layer 1 is a reflective electrode layer, and the second electrode layer 2 is a transflective and semitransparent electrode layer. The first electrode layer 1 and the second electrode layer 2 and the space between them form a microcavity structure.

[0053] The organic light emitting display device further includes a first green light compensation layer 4 disposed between the green light unit 32 and the first electrode layer 1 . A hole injection layer 61 and a hole transport layer 62 are sequentially stacked between the first electrode layer 1 and the light emitting layer. The material of the first green light compensation layer 4 is t...

Embodiment 2

[0078] This embodiment provides an organic light-emitting display device, the device structure of which is the same as that of Embodiment 1, except that the second green light compensation layer 52 and the red light compensation layer 53 are not included.

[0079] The device structure of the red organic light-emitting diode in this embodiment is: ITO (10nm) / Ag (100nm) / ITO (10nm) / CuPc (20nm) / TPD (110nm) / CBP:Ir (piq) 3 (3%, 30nm) / TPBi(40nm) / LiF(1nm) / Mg:Ag(20%, 15nm) / NPB(60nm).

[0080]The device structure of the green organic light-emitting diode in this embodiment is: ITO (10nm) / Ag (100nm) / ITO (10nm) / CuPc (20nm) / TPD (110nm) / TPD (80nm) / CBP:Ir (ppy) 3 (10%, 30nm) / TPBi(40nm) / LiF(1nm) / Mg:Ag(20%, 15nm) / NPB(60nm).

[0081] The device structure of the blue light organic light emitting diode in the present embodiment is: ITO (10nm) / Ag (100nm) / ITO (10nm) / CuPc (20nm) / TPD (110nm) / CBP:DPVBi (3%, 30nm) / TPBi ( 40nm) / LiF(1nm) / Mg:Ag(20%, 15nm) / NPB(60nm).

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Abstract

The invention belongs to the technical field of display, and specifically relates to an organic light emitting display device and a manufacturing method thereof. The organic light emitting display device comprises a first electrode layer manufactured by at least a reflecting material, a second electrode layer manufactured by at least a semi-reflecting and semi-transparent material, and a luminouslayer between the first electrode layer and the second electrode layer. The luminous layer comprises a red light unit, a green light unit, and a blue light unit. A first green light compensating layeris arranged between the green light unit and the first electrode layer. In the organic light emitting display device in the structure, the first electrode layer forms a full-reflecting layer, and thesecond electrode layer forms a semi-reflecting and semi-transparent layer, the two layers form a microcavity structure. Through arranging the first green light compensating layer between the green light unit and the first electrode layer, green light optical length is increased, so as to increase the number of interference of the green light in the microcavity, and green light spectrum is narrowed, and purity is improved. The method for the organic light emitting display device is simple, and cost is reduced.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to an organic light-emitting display device and a preparation method thereof. Background technique [0002] Organic electroluminescence display (English full name Organic Light Emitting Display, referred to as OLED) is an active light-emitting display device, due to its advantages of high contrast, wide viewing angle, low power consumption, thinner volume, etc. It is prepared by a roll to roll process and is easy to realize flexible display, which is one of the most concerned technologies in the current flat panel display technology. [0003] With the continuous development of OLED technology, higher and higher requirements are placed on the performance of display devices. For example, increasing the color gamut, etc. The so-called color gamut is a method of encoding a color, and also refers to the sum of colors that a technical system can produce. figure 1 It is a c...

Claims

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Application Information

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IPC IPC(8): H01L27/32H01L51/52H01L51/56
CPCH10K59/35H10K50/852H10K71/00
Inventor 李田田何麟李维维田景文李梦真周小康逄辉
Owner YUNGU GUAN TECH CO LTD
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