Innovative Light Emitting Element Design for Enhanced Display Efficiency
Here’s PatSnap Eureka !
Summary
Problems
Existing display devices using organic light emitting diodes (OLEDs) face challenges in maintaining luminescence properties and efficiency due to the solution process used in forming the light emitting layer, which can lead to a pile-up phenomenon and reduced lifespan.
Innovation solutions
A light emitting element is proposed with a structure where a light emitting layer and a cathode electrode are sequentially stacked on the surface of a conductive ball, along with a manufacturing method that involves forming a base layer with conductive balls, depositing an insulating layer, a light emitting layer, and a metal layer, and then separating the conductive balls.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If a solution process with inkjet device is used to form the light emitting layer, then the manufacturing complexity is reduced, but the luminescence properties deteriorate due to pile-up phenomenon during drying
Why choose this principle:
The light emitting layer is segmented into multiple sub-layers (first light emitting layer and second light emitting layer) with different material compositions and functions. The first layer uses a host material with high glass transition temperature to prevent pile-up, while the second layer contains the actual light emitting dopant. This segmentation allows each layer to perform its specific function optimally without interfering with the other, thus maintaining luminescence properties while using solution process.
Principle concept:
If a solution process with inkjet device is used to form the light emitting layer, then the manufacturing complexity is reduced, but the luminescence properties deteriorate due to pile-up phenomenon during drying
Why choose this principle:
The patent changes the glass transition temperature parameter of the host material to be higher than the drying temperature of the solution process. This parameter change prevents the organic material from softening and piling up during drying, thereby maintaining smooth surface morphology and good luminescence properties while still allowing solution-based manufacturing.
Application Domain
Data Source
AI summary:
A light emitting element is proposed with a structure where a light emitting layer and a cathode electrode are sequentially stacked on the surface of a conductive ball, along with a manufacturing method that involves forming a base layer with conductive balls, depositing an insulating layer, a light emitting layer, and a metal layer, and then separating the conductive balls.
Abstract
A light emitting element include: a spherical conductive ball made of a metal material having conductivity; a light emitting layer covering a portion of a surface of the conductive ball; a metal layer formed on the light emitting layer; and an insulating layer covering at least a portion of a remaining portion of the surface of the conductive ball.