Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

organic electroluminescent device

An electroluminescence device and electroluminescence technology, which are applied in circuits, electrical components, electric solid devices, etc., can solve the problems of color shift, low luminous brightness of red photonic pixels and green photonic pixels, etc.

Active Publication Date: 2021-04-30
YUNGU GUAN TECH CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practical applications, when the blue sub-pixel is turned on, although the voltage is mainly across the blue sub-pixel, due to the better conductivity of the hole injection layer, part of the voltage will migrate to the green sub-pixel through the hole injection layer. And / or in the red sub-pixel, since the turn-on voltages of the red sub-pixel and the green sub-pixel are lower than the turn-on voltage of the blue sub-pixel, the red sub-pixel and / or the green sub-pixel are easy to be turned on at the same time
That is, in the case of low gray scale, the luminous brightness of the red sub-pixel and / or green sub-pixel cannot strictly meet the requirements to achieve the low-brightness display effect, and the low gray scale color cast (reddish) phenomenon occurs

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • organic electroluminescent device
  • organic electroluminescent device
  • organic electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] This embodiment provides an organic electroluminescent device, such as Figure 4 As shown, it includes a pixel defining layer 1 disposed on a substrate 3 , and a groove 11 for accommodating a sub-pixel unit is opened in the pixel defining layer 1 . In the organic electroluminescent device provided in this embodiment,

[0054] The device structure of the red sub-pixel unit is: ITO(10nm) / Ag(100nm) / ITO(10nm) / CuPc(20nm) / TPD(200nm) / CBP:Ir(piq) 3 (3%, 30nm) / TPBi(40nm) / LiF(1nm) / Mg:Ag(20%, 15nm) / NPB(60nm);

[0055] The device structure of the green photosub-pixel unit is: ITO(10nm) / Ag(100nm) / ITO(10nm) / CuPc(20nm) / TPD(150nm) / CBP:Ir(ppy) 3 (10%, 30nm) / TPBi(40nm) / LiF(1nm) / Mg:Ag(20%, 15nm) / NPB(60nm);

[0056] The blue light sub-pixel unit device structure is: ITO(10nm) / Ag(100nm) / ITO(10nm) / CuPc(20nm) / TPD(120nm) / CBP: Firpic(3%,30nm) / TPBi(40nm) / LiF( 1nm) / Mg:Ag(20%,15nm) / NPB(60nm);

[0057] The pixel definition layer 1 is polyvinyl alcohol, and the static contact angle between poly...

Embodiment 2

[0059] This embodiment provides an organic electroluminescent device, the structure of which is the same as that of Embodiment 1, except that figure 2 As shown, the longitudinal section of the pixel defining layer 11 is a regular trapezoid, the side length of the upper and lower bottom surfaces is 22um, the height is 1.5um, and the angle between the bottom surfaces is 150°.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

Abstract

The present invention relates to the field of display technology, and discloses an organic electroluminescence device, which includes a pixel definition layer arranged on a substrate, and a plurality of grooves for accommodating sub-pixel units are opened in the pixel definition layer. The limiting layer is in contact with the sub-pixel unit through a hydrophilic surface. Since the carrier functional layer is usually an organic compound containing lipophilic and hydrophobic groups such as hydrocarbon groups or aromatic groups, the carrier functional layer tends to grow in an island-like pattern on the hydrophilic surface, that is, on the surface of the pixel defining layer The carrier functional layer forms a discontinuous film structure. Therefore, when a sub-pixel unit of a certain light-emitting color is turned on, the carriers applied to the sub-pixel unit will not migrate to adjacent sub-pixel units of other light-emitting colors through the carrier functional layer, avoiding the The sub-pixel units are lit at the same time, effectively solving the problem of color shift at low brightness.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an organic electroluminescent device. Background technique [0002] Organic electroluminescent display (English full name Organic Light Emitting Display, referred to as OLED) is an active light emitting display device, because it has the advantages of simple preparation process, low cost, high contrast, wide viewing angle, low power consumption, etc. Large-screen display, easy to match with integrated circuit drivers, easy to realize flexible display and other advantages, is expected to become the mainstream flat panel display technology of the next generation, and is one of the most concerned technologies in flat panel display technology at present. [0003] figure 1 The voltage-brightness curves of the RGB three-color sub-pixels in the existing full-color display device are shown. It can be seen from the figure that in the existing OLED display device, the turn-on voltages o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01L27/32
CPCH10K59/35H10K59/122
Inventor 周小康李梦真何麟李维维杨鹤刘彬
Owner YUNGU GUAN TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products